The CAD files and renderings posted to this website are created, uploaded and managed by third-party community members. 10. The radiused dovetail design lets the core blade seat automatically at the required angle with the mold closed. The injection molding sliding mechanism features so many different parts. What is an Injection Molding Lifter? An injection molding lifter, also known as a mold lift or mold lifter, is a mechanical device that is used to support and position the mold during the injection molding process. Injection mold angle lifter is the mechanism in the injection mold to release the plastic molded parts undercut and ejector the part out off mold. Therefore, ejector pins injection molding involves the removal of completed parts from the die molds. Lifters are critical components that impact tool maintenance, repair, and injection molding. Convenient logistics service, fast quotation, 24-hour online service. It can cause the ejector pins to push against the molded part unevenly, which can. Mar 10, 2020 - Plastic injection mold lifter design is a combination of the ejection mechanism and the side-core pulling mechanism appalling in the plastic injection mold. This was in turn creating excess load on the lifters leading to twisting or imbalance within the. 2 Structure of Injection Mould. The Teflon injection molding process steps can be broken down into the following steps: Melting: The Teflon is melted in the barrel of the injection molding machine using heat and shear. Use the groove or insert installation part of the cavity; 2. g. As is typical, the plastic injection mold comprises a lower core plate 12 and an upper cavity plate 14 which separate along a parting line 16. We produce parts in a wide scope of sizes and shapes for any application. . Partially made into a spiral shape; 4. • Hot Runner and Cold Runner. Web: Injection Molding Short is a manufacturing process that involves injecting molten material, typically plastic, into a mold cavity. CNC custom parts mold automatic lifter for plastic injection molding $50. . Mechanical injecion mold Slide Design Standards, Hydraulic injecion mold Slide Design Standards, Injection Mold Lifter Standard, injection mold design The injection molding lifter comprises two essential parts: the body and the shaping portions. Progressive Components (Wauconda, IL) has introduced the ModuLifter Undercut Release System that simplifies the release of undercuts for large molds using a rod-style, standardized modular lifter assembly. Injection moulding (U. Typically, the ejection system in an injection molding setup works with the ejector pins. Injection molding lifters consist of a blade-like or pin-like lifting mechanism, an ejector plate, and a retainer plate. Here are 5 ways that can help you effectively deal with undercut molding designs. In this video, our Divisional Process Development Manager, Chris Butler explains four of the most common component faults and an overview of why they most of. High quality 1. The most common guide device is the guidepin and guide sleeve. This makes it an ideal choice for mass production of parts and products. 003 in. The first step in die casting mold-making process a die-casting mold is figuring out the part’s design. 8. In conclusion, high volume injection molding is a manufacturing process that involves the production of large quantities of plastic parts in a cost-effective and efficient manner. An injection mold slider is a tool used in the injection molding process. To get a price for export plastic injection mould there are a few things that you are going to provide to your mould supplier,. 00. One of the goals of rapid injection moulding is to produce parts quickly. KTM was established in Ontario, Canada in 1985, with over 35 years of experience. We will explain it later. It is employed to handle specific shapes or structures within the mold, often utilized for creating internal undercuts or com. Lifters for injection molding can be classified as integral or non-integral. An injection molding lifter is a mechanical component used in injection molds to facilitate the ejection of molded parts with complex undercuts or features. Its unit of measurement is degrees. Mold lifters offer a safer and faster method of moving molds versus chains. Generally speaking, a lifter generally consists of two parts: the body and the forming parts. It is designed to move vertically within the mold cavity, lifting specific parts of the molded product off the core side of the mold. TheseInjection mold angle Lifter is the mechanism in the injection mold to release the plastic molded parts undercut and ejector the part out off mold. As shown in the figure as below , the lifter is placed in the angled hole of a. Pinterest. The short answer: plastic injection molds cost anywhere between $100 for a 3D printed low-volume injection mold to $100,000+ for a complex multi-cavity steel mold for high-volume production, which generally represents the most significant fixed start-up cost in injection molding. The appearance and location of the parting line can have an impact on the quality. 0 unit. Lifter: Lifter is a kind of tilted top plate mechanism, through the linear movement of the top bar, the lifter is pushed upward or downward to complete the demolding action of the product. In addition to these major players, there are. 5 degrees is recommended for general injection molding jobs. The hand-loaded piece is ejected with the finished part and. . 6. Injection Molding Fundamentals rt_0111_us An Introduction to Injection Molding STUDY GUIDE Routsis Training 275 Donahue Rd, Suite 1 Dracut, MA 01826 tel: (978) 957-0700 fax: (978) 957-1860 2 LICENSE AGREEMENT -. This video contains several injection mold delicate delay mechanisms for ejection and core pulling. Our carts increase safety and efficiency! 3550 E. With an extensive product selection supported with superior customer service, you can count on PCS to meet your needs. The design engineer must understand the part geometry, including any undercuts or other features that may require a lifter. Locking Swiveling Wheels. The Solution: Injection Molding Handloads. ManufacturerMold Components including daters, gate cutters, ejector pins, sleeves, blades, and so much more! Visit us today to get started! 800-626-6653 [email protected]. 518 of lifter travel. The engineer needs to consider the. Common ejector options include pins, blades, sleeves, bars, stripper plates and lifters—and each option brings its own tradeoffs. For example: arrange A company to design, B factory making mold base, C factory making core block, D factory making slider/lifter/insert etc (request every supplier control the tolerance within your requirement, so that is easy to assembly). This video will explain how to injection mold lifter work? Lifter used to solve undercut, when ejector plate moving, lifter will move as lifter. 4 Roller Ball Bars or Die Lifters 3. Our company is molding&engineering company, provide Custom CNC Machining service to our customers. Products From DME - Here You Can Find Thousands of Our Products In Stock From Standard Mold Bases To Plates, Pins, Insulator Sheets & So Much More! 800-626-6653 [email protected] PRODUCTSPlastic in Injection Molds The high thermal conductivity of copper alloys makes them ideal materials for the injec-tion mold sprue bushing and runner bars. Lifter Systems Application. Using these process changes, singly or in combination will generally eliminate the sticking problem. 4 Roller Ball Bars or Die Lifters 3. Today Randy takes a look at calculating angles for lifters and how angles can impact mold maintenance. PCS Company mold components are designed and manufactured to exceed demanding customer expectations for quality, reliability, and performance. The mold, however, may consist of areas too far away to accommodate regular cooling channels. Plastic mold is the abbreviation of a combined mold used for compression molding, extrusion, injection, blow molding and low foaming molding. Description. Injection mold angle Lifter is the mechanism in the injection mold to release the plastic molded parts undercut and ejector the part out off mold. Lifter is use for release internal undercut from component. Tooling, or molds, is a crucial component in injection molding. It allows for the creation of complex and intricate designs with ease and efficiency. Injection Mold Lifter Assembly | 3D CAD Model Library | GrabCAD. Actually, 5 axis CNC is most useful for complex machining. The cop-per alloys are: • C17200, high hardness beryllium-copper alloy • C17510, high. When there is no K/O holes next to the undercut, the lifter must be reset by the putter. Multiply the desired depth by the desired width and you get the flow area in square inches. At Creatingway, we widely use it in the manufacture of parts for commercial purposes. . It utilizes a closed mold and a low-moisture low-oxygen environment. Among the others, the cooling step (step 3) is the most dominant stage by occupying roundly 70–80% of the cycle time []. Thermocouples. other components within the mold. Slides can be either mechanical or hydraulic and are expensive. This content and associated text is in no way sponsored by or. 1. With the oblique movement of the lifter, the undercut is released during the product ejection process. Typically, manufacturers that provide a full range of services include part. It determines the amount of molten material injected into the mold cavity and influences factors such as filling consistency, part appearance, and material usage. High Pressure - VH. Due to the constraints of the mold tooling and molding press, these side cores and lifters have a limited depth or pull. In this video, you can get what is undercut, types of undercuts, how we can remove undercuts, what is slider & lifter in plastic molding, how to use slider &. It’s a very durable, impact-resistant tool steel that can be hardened up to 56 RC. We offer the production of precision-machined components. After the part has cooled, the lifter pushes up at an angle, which removes the undercut section from the mold, and retracts from the undercut during ejection. This formation eliminates the bending moment seen in conventional single-rod lifter. A lifter, in this context, refers to a mechanism integrated into the mold that enables the creation of undercuts or features in the molded part that would otherwise be challenging. in part geometry or tolerance that might result in poor steel conditions or require special tooling features such as lifters, slides, and threading. The discussion on innovative materials, automation, and real-world case studies. The lifters go in and out of the pocket smooth manually in mold dismantled condition. We are going to explore what an injection molding lifter design is, how it affects the entire process, the benefits it brings, and the limitations associated with it. CNM TECH: Overview: CNM TECH is a leading provider of large-scale plastic injection molding and die casting solutions for industrial applications. Subscribe for LIVE Chat During LectureJOIN NOW : Secure Seat NOWJoin Courses/ Program Contact : 88715119. #5 Arc core pulling mechanism. The wrong ejection system can decrease the uptime and the life of the injection mold. A Mold Lifter is a critical feature within injection molding, designed to facilitate the ejection of molded parts with complex geometries. Our mini cranes are easy to maneuver into places where conventional lifting equipment just can’t do the job. Recommended clearance for the lifter rod or bar guide bearing surface is +0. Here we'll calculate Lifter angle & Strokes. For Our Paid Online and offline A. This blog post will discuss what an injection mold slider is and its role in the plastic injection… Injection mold lifters are essential components in the field of injection molding, serving a critical role in the ejection phase of the process. Easy-to-use. Slides, Lifters and. A two plate mold and a three plate mold are different types of molds used in plastic injection molding, with the main difference being the number of plates used to form the mold cavity. By gaining an in-depth understanding of the work principles and design points of lifter, you can better address the challenges in injection. The A plate contains the cavity and core, and the B plate contains the ejector mechanism. Sprue Adjuster - SA. 1 Parallel cooling channelsBelow is a detailed injection mold lifter design guide: Step 1: Analyze the Part Design. or (2) die lifting and movement onto a bolster extension, allowing die pickup. 09/12/2020 Klarm Mould. Other mold actions include lifters, wedges or slifters (a new term), raising members and slides (sometimes referred to as splits, cams and side action). Designing of lifter used for internal undercut in injection mold. However, when changing from the molten state to the gruel state, it not only has the fast. Randy Kerkstra recently published an article at the Plastics Technology site (ptonline. are finished to some degree, but the more polishing required, the higher the cost of the mold tooling and the longer it will take to complete the mold. 14) The length of the slide foot must be 50% of the overall height of the slide. 3 degrees is required for light texture (PM-T1). S-7 can also be used for slides or lifters and hardened to 54-56 RC. PVD/PACVD surface treatments are applied in a precise, environmentally safe way by deposition from a gas or plasma state through a high vacuum process which ultimately enhances the tool's characteristics with good adhesion, high hardness, and wear resistance. Taking into consideration design features like cams and lifters can further complicate this. 9375 of ejector stroke. If you are thinking of. Annual Revenue: 100000000-150000000 USD. No adhesives. When the launch powers on the embellishment have been assessed, the following stage is to decide the total”push territory” of the ejectors onto the shaped part. Plastics injection molding is a sector that is becoming increasingly competitive due to the environmental issues it entails, pressuring consumers to reduce its use. This process offers a number of features and benefits, including cost-effectiveness, efficiency, consistency, and customization. Today Randy takes a look at calculating angles for lifters and how angles can impact mold maintenance. Our goal at KTM is to offer our clients superior service and high-quality parts with on time. Different ejection options will leave different sizes and shapes of marks on the part and require different levels of maintenance. Film gate – this type will be applied to the plate-shaped molded product. These slides play a pivotal role in enabling the production of complex parts with undercuts, threads, and intricate features. An injection molding draft angle of 1. It also varies with the product design details. zhou@kehuimold. It's a single Nozzl. Our two-platen injection molding machines are characterized by an extensive clamping force on the smallest footprint. There’s also a block-like locking mechanism. The design point of the snap joint lies in “joint”, i. Whether your project needs are for a few hundred of. Proper design helps ensure that good parts will be produced on the first run. In plastic injection molding applications, PVD coatings are an excellent method to reduce wear and corrosion. 8 mm (32 threads per inch) Use a trapezoidal or buttress thread. Complex Ejection Mold Lifters provide the mechanism for releasing parts with undercuts, threads, or any intricate features. A hybrid hint-based and fuzzy comprehensive evaluation method is proposed in this paper to recognize mold piece region and generate optimal parting curve for 3D CAD model in injection mold design. PCS Company's Lifters assist in accommodating movement or action within the mold. It consists of two main parts, sides A and side B. 003” to . Made from durable steel or aluminum alloy, it provides stability and support to withstand the pressures and forces involved in the injection molding process. The design engineer must understand the part geometry, including any undercuts or other features that may require a lifter. We offer the most complete range of die clamping and handling systems in the industry for applications with mechanical presses, hydraulic presses, forging presses, injection molding machines, and die-cast machines. Disk gate – this gate is used to prevent eccentricity and weld when molding disk or cylinder-shaped products, however, there is a disadvantage in that the finishing of the gate part is difficult. The issues are never deliberate; they are due to various problems arising from the mold manufacturing process itself, the nature of the. 038 mm) 11. The slider usually has a hydraulic system that pushes it in a lateral direction. land and using maximum vent depths to get them as close to self-cleaning as possible. e. Texas Injection Molding engineers work with our customers to develop and design the most robust plastic injection molded products. 1. Rather than use a side-action cam, an insert is machined so the undercut can be applied and is bolted into the mold where a pocket matches the insert dimensions. Whereas if you are wanting a plastic packaging container in an odd shape, you will be spending a little more. We'll learn how to calculate angle and stroke in lifter. These A die change cart or mold change cart makes transporting extremely heavy loads for quick die changes or quick mold changes simple and safe. Taking into consideration design features like cams and lifters can further complicate this. The mold utilizes four slide actions, eight lifters, and a delayed cam/lifter assembly. Shop. Injection Molding Lifter; Injection Molding Cavity VS Core; Contact Info. . the part this time is create core cavity Lifter use mold tools. It plays a guiding role when the front and rear molds are closed; its role is to guide. But by following a few simple rules, even the most difficult of these challenges can be overcome (parenting aside). Written by: Ben MacDonald, Senior Applications Engineer. Bumpoffs. A Mold Lifter is a critical feature within injection molding, designed to facilitate the ejection of molded parts with complex geometries. Moldworx has found that the industry standards range. Injection molding is a process in which plastic pellets are melted and injected under high pressure into a mold cavity. Type of Side Action. This is an animation of a basic injection mold slide action. Lifter: The injection mold lifter is an essential component that makes the whole injection molding process successful. Install the slotted slat core in the longitudinal position and set hole. Lifters: A lifter is a mold component that travels with the ejection stroke and moves on an angle to slide/pull the cavity steel away from the undercut feature or detail not in the die draw. 1) All mechanical slide design standards relative. Design experience points for injection mold slider and lifter. In order to increase the efficiency of the production process, the plastic material is cooled by. In this series of lectures, you will learn the easiest explanation of injection mold design calculations, this lecture will help you to understand how to des. They play a crucial role in injection molding, allowing the production of complex parts with undercuts on both the exterior and interior surfaces. To achieve this, a “slide” or “slider” is often used as a core-pulling mechanism. The radiused dovetail design lets the core blade seat automatically at the required angle with the mold closed. • Bi-Color Molding - Two Color Co-Injection. Finally injection molding is carried out for the part. Increasing cooling time may also help. Intermold® technology : injected plastic hooks - APLIX. 002-0. We have die handlers and motorized lifters for any need. At DME safety come first. Year Established: 1998. Spring driven Mechanism. Summarizing the key points underscores the importance of injection mold slides in modern manufacturing, highlighting their role in achieving intricate designs and improving efficiency. Thermocouples. Injection molding lifters are movable components within a mold that enable the creation of undercuts or features that require an angle relative to the direction of the mold’s opening and closing. Typical mold base materials make horri-ble wear surfaces. Position Parting Lines. A short, yet informative, description of slide design and other issues can be found in section 12. Injection molding is one of the advanced manufacturing technologies for the low-cost and reliable production processes. alloys in injection molds C17200 (A), C17510 (B) and C18000 (C) against H-13 and 420 SS. What is PPS Injection Molding. To survive in today’s competitive worldwide. Keep your most valuable assets, your employees and materials safe by using DME lifting hardware. Sprue Bushings and Runner Bars 2. Lifter can release undercut from a esay way by an simple formula. An injection molding lifter, also known as an ejector pin or stripper pin, is a crucial component used to push or eject finished plastic parts from the mold cavity after. . To help you navigate this process, here’s a step-by-step guide for designing an injection slide mold: 1. Hand loads: Hand loads, or hand-loaded inserts, are a method of achieving a part feature without designing it into the mold, but rather by hand-loading a. Services: Their expertise lies in manufacturing complex, high-volume components with tight tolerances and advanced material options. As plastic fills the mold cavity, it compresses the air that is in the cavity. When the temperature rises above the melting point, the liquidity of melt will become obvious. The injection mold lifter design is an integral part of injection molding processing. Keep your most valuable assets, your employees and materials safe by using DME lifting hardware. Avoid adding threads directly on your injection molded part. Injection molding is characterized by the injection of a polymer at high temperature and pressure into the mold cavity [1,2,3]. Essentially acting as the gateway to the molding system, the sprue plays a fundamental role in determining the. A two plate mold and a three plate mold are different types of molds used in plastic injection molding, with the main difference being the number of plates used to form the mold cavity. Injection molding is a high-precision manufacturing process that injects molten plastic into a carefully designed mold, where the plastic cools and hardens into the specified part or product. The injection mold angle lifter is the mechanism in the injection mold to release the plastic molded parts undercut and eject the part out of the mold. Plastic Injection Mold Project Manager/Focus on plastic injection filed 10 yearsAlpine mold utilizes advanced mold design and manufacturing technologies to create innovative solutions adapted to the challenges of the automotive industry. Rm101, Number 2, Street 11, Wen Ming South Road, Qiaotou, QiaotouZhen, Donggguan City, Guangdong Province, China. Injections. Almost every plastic part created today is by injection moulding as it allows identical parts to be created in huge numbers, in a short space of time, and at very low cost per part. Other mold actions include lifters, wedges or slifters (a new term), raising members and slides (sometimes referred to as splits, cams and side action). We stand behind these products and are confident they are the highest quality in the industry. . They are a combination of slider, lifter, spring, and eje. Disclaimer! Please do not use this lifter concept directly in production. The molten material. 040-in. This was in turn creating excess load on the lifters leading to twisting or imbalance within the whole of the ejector assembly especially when. Mold Lifting Beams. This is in contrast to a “hot runner” system, which uses heated channels to deliver. 3 degrees is minimum for a shutoff (metal sliding on metal). In a world where customers have…ROEMHELD Hilma is a worldwide market leader in quick die change systems and products. Adjust the design for the flow pattern to be a single source flow. Here we'll calculate Lifter angle & Strokes. Engaged in mold production, manufacturing and processing for five years, exported to major countries around the world. 8159 Injection Mold Lifter product, with strict quality control 48 HRC Injection Mold Lifter factories, producing high quality 48 HRC Injection Mold Lifter products. Fixed mould lifter structure -2. It can cause ejector pins to bend and break. This comprehensive guide will explore the differences between conventional and precision injection molding, the challenges faced in this process, troubleshooting common problems, the importance of areas of precision,. One of the goals of rapid injection molding is to produce parts quickly. molds. We’re going to look into each one of these components and explain how they work and why we chose them. Injection mold lifter scoring; July 14, 2022 Injection mold lifter scoring. Comparison of mold. Smooth performance is attained due to the U-C. This enables us to run with injection pressures that are. For Our Paid O. During hot runner injection molding process, the hot runner plate needs to be heated, so the area around the hot runner gate needs to be cooled. 5. The first step in ordering your custom plastic packaging containers would be to determine the size and shape of the container that you need. 1. If there are surface defects such as gouges, nicks, scars, and dents in the mold cavity and sprue. Sprue Adjuster - SA. Introduction. Mold. S = T + 2-3mm (S is the horizontal travel distance of the slide; T is the undercut of the finished product); S = H * sinα-δ / cosα (δ is the gap between the angle pin and the slide, generally is 0. 1 of Menges and Mohren's How to Make Injection Molds}. CUMSA is a family company dedicated to the design, manufacturing and distribution of innovative standard mold components and solutions for the moldmaking and molding industries. spelling: injection molding) is a manufacturing process for producing parts by injecting molten material into a mould,. These slides play a pivotal role in enabling the production of complex parts with undercuts, threads, and intricate features. Explore. com) that went into more detail on lifters and was a continuation of his previous post. While lifters provide vertical movement to create undercuts, sliders generate horizontal motion that creates grooves or slides on surfaces. The un. 003 in. There are a few key considerations. A series of plastic parts with different shapes and sizes can be processed by the coordinated change of punch, die and auxiliary forming…(Sumber : MOLD CLAMPING MECHANISM OF AN INJECTION MOLDING MACHINE, ItoSusumu,et all, 1996) Gambar 2. Cost-effectiveness: Plastic injection molding is generally a. Lifter usually has a simpler structure and larger ejector force. Determining where the line should go can improve part cosmetics and functionality. in 3D Modeling Design. A lifter is a component that moves on an angle with the ejection to release an undercut on a part. by crane operator) Anti-collision sensors will stop the unit. We’ve created effective, dependable. Intermold® technology is a breakthrough patented one-step injection molding solution which allows the creation of hooks directly into plastic parts. A typical cooling system in injection molding 2. Unlike a slider, which pushes the injection molded part to one side, a lifter pushes the part upward and at an angle. The form creator ought to think about various plans with a differing number and sizes of ejectors. When air venting is extremely difficult, the mold can adopt a. There needs to be a balance between fit of the halves, function of the part, visual quality expectations, and the cost to produce the mold. Plastic resin is fed into the loader in pellet form. 2. Plastic injection molding is the process of injecting molten plastic material into a metal tool which then cools and ejects a plastic part from the machine. D-M-E Company introduces pre-engineered lifters with angles up to 30° and more September 2003 - D-M-E doubles undercut capability in plastic molds with the new VectorForm (TM) Lifter System. 8 Hechang Road, Shatousha, Chang'an, Dongguan, China. Lifters also can drag on the part and create plastic flakes. 5, for example, and this injection molding die has a cavity portion 4a which is a cylindrical concave portion as in the previous example. Injection molding lifters are mechanical components that are used to lift or move specific features of a molded part during the ejection process. The product (Lifters In Injection Molding) is well-made and durable, with a long service life. There are many variables and impacts that lifters can have on your molding process and final parts. Sometimes there are some features on B Side of surface and they create interference in mold separation (features like snaps, dog house etc), they are in internal undercut region. . An Injection Molding Sprue refers to the channel through which molten material is introduced into a mold. What is injection molding? Injection molding is the technique where molten plastic is injected into a metal mold. Injection molding gate is the entry point through which molten material is injected into the mold cavity. We have specialized in the release of small and medium undercuts even if they are simple, double or round. For this type of plastic injection mold tooling, we use pre-hardened steel material, such as 1. Molds sit securely on the platform table, preventing accidents when. The designers of the injection mold processing plant found that if there is no preset gap in the mold design, it will lead to many problems such as poor assembly and needle breakage and needle burning when ejecting the mold. In most cases, the lifter rod or shank will be shortened by 0. 5 Axis CNC Machine for high precision plastic mold manufacturing. The mechanism for this mold slider is set up so that the lateral sliding positions the plastic at the best angle that allows the ejector pins to lift it up out of the mold without any problems. 0 /5 · 12 reviews · "Nice service"1. PCS Company's Lifters assist in accommodating movement or action within the mold. Unlike vertical ejection systems, lifters angle in the core plate. The first step in designing a lifter for injection molding is to analyze the part design. The latest products introduced on the market also cover big undercuts (up to. This is, however. Mold Components. In the early days of mold building a very hard steel plate was insert-ed in the mold base to act as a wear surface interface. But the power comes from the clamping force of plastic parts to the lifter and spring. The exact manner of construction and installation varies with the other machine specifications. Watch on. Mold Action /. PTFE injection molding is a process used to manufacture PTFE products by injecting molten PTFE into a mold. With over 18 years in the business, we have. Propane powered with internal combustion engine and on-board PLC and equipment for remote starting of engine and transport. Engaged in mold production, manufacturing, and processing for five years, exported to. However, rather than using an angled pin to control the action’s movement, lifters are driven by the action of the injection molding press pushing against the ejector plates. 2. The student willl be introduced in scientific molding. The ejection system alone has several considerations. If you are thinking of getting into mold making technology and would like to know what a lifter is, then you are in the right place. They play a crucial role in injection molding, allowing the production of complex parts with undercuts on both the exterior and interior surfaces. e. An A-side (cavity) and B-side (core) of a mold are represented with the ejector plate and pins placed on the B-side. Packing pressure and time significantly affect sinks. The reasons and corresponding solutions are described as follows: 1. Filter Valve - FV. Necessary lifters are much more compact and damage-resistant. 3. Bumpoffs are an easy way to mold lens covers, container caps, and similar parts with functions that call for them to snap into place.