Locking Swiveling Wheels. Propane powered with internal combustion engine and on-board PLC and equipment for remote starting of engine and transport. 1 to 2 degrees works very well in most situations. The size of. When there is no K/O holes next to the undercut, the lifter must be reset by the putter. If you need a smaller container, or a basic plastic mold then you are looking at spending less money. It includes machines from 3,500 to 55,000 kN clamping force: from the entry-level t-win model and the customizable duo tech to the fast duo speed. The causes of parts sticking and sprue sticking are multifaceted, among which mold failure is one of the main reasons. 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. The product (Lifters In Injection Molding) is well-made and durable, with a long service life. 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. Intermold® technology : injected plastic hooks - APLIX. 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. The plastic part looks simple, but the side wall has many side holes and undercuts. The engineer needs to consider the. The slider usually has a hydraulic system that pushes it in a lateral direction. Feature Depth. This idea is nothing new for the injection molding industry but at Fortify we take it to a whole new level with our 3d printed mold tools. Lifter: The injection mold lifter is an essential component that makes the whole injection molding process successful. This design eliminates the. 2. It is typically mounted on the moving half of the mold, and it helps to lift the mold off the stationary half of the mold during. Kehui Mold is a professional production and processing company in the plastic moulding industry, specializing in the industry for more than 8 years, and has accumulated a lot of practical experience. With the oblique movement of the lifter, the undercut is released during the product ejection process. 1-3). The injection mold designer should follow the preferred order of ejection types. These are used to create under cuts in plastic parts. An Injection Molding Sprue refers to the channel through which molten material is introduced into a mold. Progressive Components is an independently operated developer and distributor of componentry and software for the production tooling industry delivering convenience for the mold builder and unmatched tooling performance for molders and OEMs. Common products mold design reference shrinkage rate of 0. 2023年11月22日 / 0 Comments / by Steve Yang. Single-Rod Lifter Systems. Min Order: 1 set. Rolling systems based on balls (most flexible movement), rollers (move the die in a linear direction), and bars (smooth movement) 3 operating technologies are available: Mechanical (for small and mid-sized dies and no power needed), Hydraulic ( heavier dies), and Pneumatic (for clean application and higher loading capacities)A core lifter system for a plastic injection mold, where one or more core blades is used to not only provide an undercut in the formed molded part, but also aid in ejecting the molded part from the mold. However, when changing from the molten state to the gruel state, it not only has the fast. Sep 21, 2017. This post is part of our Designing for Injection Molding series. Designing an effective injection molding slide r is a crucial part of the mold creation process. A new approach to designing lifter cores utilizes a second guide rod that is parallel to the lifter rod. Benefits of Efficient Runner Systems Reduced Material Waste. Custom insert molding is a manufacturing process that involves combining metal or plastic inserts with molten plastic to create a finished product. At its most basic level, the slider is used to turn the vertical. The lifter structure shown in the figure below can be used. 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. Identical mold components were fabricated from the three copper alloys and steel materials. This video contains several injection mold delicate delay mechanisms for ejection and core pulling. Our two-platen injection molding machines are characterized by an extensive clamping force on the smallest footprint. Bumpoffs are an easy way to mold lens covers, container caps, and similar parts with functions that call for them to snap into place. Lifter is use for release internal undercut from component. We'll learn how to calculate angle and stroke in lifter. com | 2023-10-30T09:39:16+08:00 August 26th, 2022 | Comments Off on Cnc Machine Parts Share This Product, Choose Your Platform!Building C, Xiaodong High-tech Industrial Park, No. This detail shows a lifter at 10 degress with 2. With over 18 years in the business, we have. During this course, the student will learn the principles of injection molding and how design a injection mold. This is in contrast to a “hot runner” system, which uses heated channels to deliver. The CAD files and renderings posted to this website are created, uploaded and managed by third-party community members. Mold Lifting Beams. Learn more. When the temperature rises above the melting point, the liquidity of melt will become obvious. 1. Tooling, or molds, is a crucial component in injection molding. The molded parts are then ejected, and the process repeated. 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 &. com) that went into more detail on lifters and was a continuation of his previous post. Decatur, IL 62521; Call Today 217-864-4125;. Sprue Bushings and Runner Bars 2. Filter Valve - FV. Unlike a slider, which pushes the injection molded part to one side, a lifter pushes the part upward and at an angle. Generally, minimum distance that product can be demolded plus 2~3mm is taken as minimum stroke: 2. The Solution: Injection Molding Handloads. A lifter is a mechanism used in the design and manufacturing of molds, typically in plastic injection molds or die-casting molds. Enhancing Injection Molding Efficiency with Injection Molding Lifters. Learn what an undercut in injection molding is and how to design your part avoiding undercuts. Employees: 100~200. 5. Injections. 4. There are two situations when mold cleaning is required: (1) offline when the mold is on the bench and is cold (room temperature) and (2) online when the mold is warm and still in the press. It is. The radiused dovetail design lets the core blade seat automatically at the required angle with the mold closed. Its function is to define the shape and features of the final product during the injection molding process. This prevents severe mold damage in addition to the related down-time, which can often be more expensive and troubling than the mold damage itself. 005 deep. 1 Parallel cooling channelsBelow is a detailed injection mold lifter design guide: Step 1: Analyze the Part Design. Lifter can release undercut from a esay way by an simple formula. Keep your most valuable assets, your employees and materials safe by using DME lifting hardware. The most common guide device is the guidepin and guide sleeve. See moreWe 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. 00 - $200. in part geometry or tolerance that might result in poor steel conditions or require special tooling features such as lifters, slides, and threading. The mold base is a fundamental component in injection molding, serving as the backbone of the mold assembly. A lifter is a component that moves on an angle with the ejection to release an undercut on a part. Portable die lifters provide a large mechanical advantage by multiplying hand/handle motion to lift the die. All molds should have eyebolt holes on the top side. 2. and molding will be to collect each issue to use as a reference in both the applications of the copper alloys and the mold design principles. Key Points. One of our expert trainers will lead the course and encourage live participant interaction without the need to travel. An A-side (cavity) and B-side (core) of a mold are represented with the ejector plate and pins placed on the B-side. 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. While full hydraulic pressure during injection is not commonly available — and using standard hydraulic cylinders to move, hold and compress the cores duringThe following SPI Mold classifications are guidelines to be used for quoting and placing orders on the various classes of plastic injection molds. Two streams of resin are injected into the mold simultaneously, along with a catalyst (such as molybdenum or tungsten) to set off the proper chemical. Propane Powered. Plastic injection mold lifter design is a combination of the ejection mechanism and the side-core pulling mechanism appalling in the plastic injection mold. 523000. Automatic Unscrew Structure Mold Design. In most cases, cavities are hardened to 50-52 RC. Small batch injection molding is a manufacturing process to production of small quantities of injection molded parts. Manufacturing. . The design engineer must understand the part geometry, including any undercuts or other features that may require a lifter. Designing of lifter used for internal undercut in injection mold. Injection molding lifters consist of a blade-like or pin-like lifting mechanism, an ejector plate, and a retainer plate. One of the goals of rapid injection molding is to produce parts quickly. What is Injection Molding Lifter. In This Tutorials We'll Discuss Lifter Design calculation for Plastic injection Mold Design. 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. The U-coupling travels freely in the T-Gib when the mold opens. Design experience points for injection mold slider and lifter. 4. The mold is split along the parting line to allow for the injection of molten plastic and the release of the finished part. Virtual instructor led training offers the traditional live, instructor-led training you’re used to from the comfort of your own home (or office). 2738HH, etc, the hardness for this injection mold tooling is HRC 33-38. Texas Injection Molding engineers work with our customers to develop and design the most robust plastic injection molded products. Thermocouples. Actually, 5 axis CNC is most useful for complex machining. com) that went into more detail on lifters and was a continuation of his previous post. The slider is driven by the oil cylinder to make a circular motion. to accommodate these clearances and make sure the lifter is down tight during mold close. It also works on Metal Injection Molding (MIM) Processes. 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. . It is employed to handle specific shapes or structures within the mold, often utilized for creating internal undercuts or com. Plastic Injection molding can be defined as a procedure, which can help in shaping plastic, in its requisite fold. Injection molding lifters are essential components in the injection molding process, playing a crucial role in the production of intricate and complex plastic parts. MCB. Auto shut-down when transfer is completed. You may or may not have heard of drafting in relation to injection molded parts. That is why there is an increasing demand for injection molds. 5. The level of detail. . Mobile: +86 135 30801277. Ideal for plastic injection producers and aluminium foundries. Progressive's UniLifters® System is the most widely used, standard product for molding and releasing undercuts. 00 - $200. lifters, wedges, cams or side actions. Be aware and plan accordingly for parting lines on injection-molded parts. 3. 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. Copyright reserved by to the special requirements of a product, the mold release direction of a particular part may not be con. It utilizes a closed mold and a low-moisture low-oxygen environment. 2738H, P20, 1. 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. 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. The U-coupling travels freely in the T-Gib when the mold opens. 1. 5) Most parts will have a tendency to “ride” with the lifters (remaining on the detail formed by the lifters), which will not let the parts fall free. operating pressure: 400 bar. VectorForm System components are engineered for the common injection molding environment. 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. The first step in designing a lifter for injection molding is to analyze the part design. TRADITIONAL MACHINES VENTS. 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. 518 of lifter travel. Remedies: Raise the temperature of the mold or molten plastic. land and using maximum vent depths to get them as close to self-cleaning as possible. Contact Info. Premature gate freeze-off will reduce the available packing time in the cavity, which can increase the likelihood of sink marks. Proper design helps ensure that good parts will be produced on the first run. No adhesives. The lifter is typically attached to the ejector plates with a slide and gibs. Material Considerations: The choice of materials for the mold. We stand behind these products and are confident they are the highest quality in the industry. A wide variety of materials can be machined, including stainless steel, aluminum, magnesium, zinc, brass and much more. 1. We have broad involvement with the structure, advancement, and assembling of plastic injection molds for the creation of PVC pipe fittings. It is. When designing mold cores for undercuts and side-action molding, the designer has several lifter system options. However, most injection molded parts are just not that simple. Plastics injection molding is a sector that is becoming increasingly competitive due to the environmental issues it entails, pressuring consumers to reduce its use. At DME safety come first. They are a combination of slider, lifter, spring, and eje. Without it, the process would become more difficult and time. Using modern CAD software products, designers usually design Cavity-Lifter Injection Mold. Copyright reserved by: lifter in plastic injection mold is mainly used to form the internal undercuts of a molded plastic part. 001 to +0. Locking Swiveling Wheels. g. Plastic resin is fed into the loader in pellet form. This rule of thumb applies to parts with mold depths of up to 2 inches. The distance between the cooling channel and the ejector pins, the sleeve, the lifter (P) is 5 mm or more. The lifter structure shown in the figure below can be used. We did a design breakdown on ways to create. The hand-loaded piece is ejected with the finished part and removed. The complexity, size, and material of the mold impact tooling costs. In order to ensure smooth demould of product, distance of movement of slider must be sufficient. Generally speaking, a lifter generally consists of two parts: the body and the forming parts. In plastic injection molding, core separates from cavity and is drawn in tooling direction. Spring driven Mechanism. molds. 1) All mechanical slide design standards relative to shut-off, molding surfaces, and. It consists of two main parts, sides A and side B. While effec-tive in providing the. Our goal at KTM is to offer our clients superior service and high-quality parts with on time. The significance of well-designed Injection Mold Lifter Design cannot be overstated in the realm of Injection Mold Lifter Design. Additionally, there are so many details regarding the mold. The process is a quick, economical way to mass produce a number of parts, ranging from high-precision engineering components to cosmetic product enclosures. It can cause the through holes in the core insert to wear out with elliptical or egg-shaped holes. Crystallinity can reach 40%. These components have some clearance to allow for mechanical movement. But the general mechanism of action of the lifter remains the same for every system. HOME - DMECauses: Weld lines are caused by the inadequate bonding of two or more flow fronts when there is partial solidification of the molten plastic. Undercuts that are on the inside of a part are handled by a similar sliding mechanism called a lifter. Germany is home to a number of world-leading injection moulding companies, including Arburg, Engel, and KraussMaffei. Mold Cores, Core Pins and Chill Plates 3. , a porous structure with micro/nano pores, on the metal plate while flowing in the mold cavity where the. The surface of the mold cavity and sprue bush is rough. The finished products can then be used as is, or as a component of other products. Mold Action /. Join 9,350,000 engineers with over 4,840,000 free CAD files Join the Community. Similar to the slide, the lifter can be classified into: the integral lifter and the non-integral lifter (combined. This was in turn creating excess load on the lifters leading to twisting or imbalance within the. by crane operator) Anti-collision sensors will stop the unit. This causes a chain reaction. Cost-effectiveness: Plastic injection molding is generally a. Injection molding lifters are mechanical components that are used to lift or move specific features of a molded part during the ejection process. Complex Ejection Mold. M. Engaged in mold production, manufacturing, and processing for five years, exported to. In This Tutorials We'll Discuss Slider and Lifter animation of Classes. The issues are never deliberate; they are due to various problems arising from the mold manufacturing process itself, the nature of the. When Injection mold opening, the lifter along the. Today Randy takes a look at calculating angles for lifters and how angles can impact mold maintenance. In conclusion, quick turn injection molding is a manufacturing process that involves the rapid production of small quantities of injection molded parts. Discussions of forces on the pin, most favored. 5 degrees is recommended for general injection molding jobs. When the auto-complete results are available, use the up and down arrows to review and Enter to select. This content and associated text is in no way sponsored by or. Create Core Cavity Lifter. Baby Crafts. Here we'll calculate Lifter angle & Strokes. Injection moulding (U. This type is effective to prevent deformation by suppressing strain. Touch device users can explore. 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. 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. Sprue Adjuster - SA. Randy Kerkstra recently. (i. Seal Bearing - JR. 5, for example, and this injection molding die has a cavity portion 4a which is a cylindrical concave portion as in the previous example. The A plate contains the cavity and core, and the B plate contains the ejector mechanism. From a processing standpoint, reducing the injection pressure, hold / pack pressure, hold / pack time, melt temperature and mold temperature can all be tried to help eliminate the part sticking issues. 003 in. Fax: +86-0769-82583659Design and Simulation-Based Optimization of C ooling Channels for Plastic Injection Mold 21 Fig. Virtual Instructor Led Training. 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. Film gate – this type will be applied to the plate-shaped molded product. The hair dryer housing is the outer casing that protects the internal components of the hair dryer, such as the motor, fan, and heating elements. #5 Arc core pulling mechanism. When Injection mold opening, the lifter along the horizontal direction movement to make plastic parts out of the undercut. While lifters provide vertical movement to create undercuts, sliders generate horizontal motion that creates grooves or slides on surfaces. The process. Sprue Adjuster - SA. All molds, with the exception of prototype, to have adequate channels for temperature control. . Slides or sliders are used to release any external undercuts or recesses on the outer surface of a part that may prevent it from being removed from the mold cavity. It's a single Nozzl. Plastic resin is fed into the loader in pellet form. Top of the range, it is the expression of the most advanced hi tech. 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. The design engineer must understand the part geometry, including any undercuts or other features that may require a lifter. 5. A blade retainer for the core blade is located in a support, with the support having a semi-circular socket shaped to engage a coupling end. 005” pad on top of the lifter to prevent part “drag”. 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. DCPD reaction injection molding is a process for quickly, efficiently creating large parts using dicyclopentadiene resin. It helps create uniformity and consistency in the final product. 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. The lifter is a feature incorporated into the molding section of injection molding. . Injection Molding Car Parts is a highly versatile manufacturing process that involves the production of intricate and precise components by injecting moltenINJECTION MOULD DESIGN. 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. Mold lifter. Designing an effective injection molding slide r is a crucial part of the mold creation process. The first is using sliding cores and angle pins. DME P-Pins & More. The pressure of the air pocket increases until the required pressure is achieved to push air out of the mold vents. Injection: The melted Teflon is injected into the mold cavity under high pressure. This is, however. Copyright reserved by: lifter in plastic injection mold is mainly used to form the internal undercuts of a molded plastic part. Injection molding is one of the advanced manufacturing technologies for the low-cost and reliable production processes. Our company is molding&engineering company, provide Custom CNC Machining service to our customers. But the power comes from the clamping force of plastic parts to the lifter and spring. During injection, full hydraulic pressure is maintained on the cores to pre-vent movement. Air Valve - VA. have two separate mold plates, the “A” plate and the “B” plate. 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. The Lifter System shown is made of standard components to simplify mold design and construction. A Comprehensive Guide to Injection Molding Gates: Types, Functions, and Design Considerations. Today Randy takes a look at calculating angles for lifters and how angles can impact mold maintenance. There is a cavity and a core lifter from the active position. . They are a combination of slider, lifter, spring, and eje. But in manufacturing, a few things go wrong leading to imperfections in the product. 1. 1. The images above (Figures 1 and 2) show an example of a difficult-to-cool lifter with five molding surfaces. These injection mold coatings are applied either in your tool room or on the press and give exceptional release characteristics to the part in the mold, allowing it to eject without sticking and thereby eliminating any pin push marks. Depending on the type of molding material, you might use a gate depth that is 50-80% of the part’s wall thickness, and depending on the flow length, the width of the gate being two to six times its depth. Handloads are inserts that are manually placed, or hand-loaded, into the mold to achieve features such as undercuts. Injection Mold Lifter. At DME safety come first. PBT Injection Molding (Moulding): PBT is a kind of crystalline polymer with a sharp melting point (225-235 Celsius degree). This detail shows a lifter at 10 degress with 2. 00. Injection Mold Tooling – Dealing with Lifters. Molding parts/components: normally called as cavity and core, which are the closest part with plastic products. 09/12/2020 Klarm Mould. These two distinctions are determined by the construction’s body and forming components. The injection mold lifter is an essential component that makes the whole injection molding process a success. CNM TECH: Overview: CNM TECH is a leading provider of large-scale plastic injection molding and die casting solutions for industrial applications. It includes several integrated stages which are (1) injection, (2) packing, (3) cooling, and (4) ejection []. Considering all the variables involved will help determine the overall injection. Seal Bearing - JR. Below is a detailed injection mold lifter design guide: Step 1: Analyze the Part Design. CNC Machining Service is suitable for engineering-grade plastic or metal parts and can be used to make from one single prototype up to hundreds parts. Plastic injection mold lifter design is a combination of the ejection mechanism and the side-core pulling mechanism appalling in the plastic injection mold. Mold lifters offer a safer and faster method of moving molds versus chains. For injection molding, there are some common troublemakers during part design: Clips and snap fits2. If the ejector plates have a guided system, the guide bushings will wear out prematurely. The appearance and location of the parting line can have an impact on the quality. Cooling: The Teflon is cooled within the mold until it solidifies and takes. If the only solution is to use a spray, try our Tuff-Kote and Dri-Kote high-performance mold-release sprays. . Cooling channels are typically drilled through the mold cavity and core. 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. No special coatings are necessary. We'll learn how to calculate angle and stroke in lifter. To get a price for export plastic injection mould there are a few things that you are going to provide to your mould supplier,. Collapsible cores are mechanisms that release a circular undercut feature in a method similar to a lifter. molds. In This Tutorials We'll Discuss Lifter Design calculation for Plastic injection Mold Design. The lifter also needs to be cooled when it is big and with a large contact surface with the product. At its most basic level, the slider is used to turn the vertical. Add 1 degree of the draft for every inch increase in. Injection molding gate is the entry point through which molten material is injected into the mold cavity. These specialized components help in the ejection and release of molded parts from the mold cavity, enabling manufacturers to. QDC systems speed up production, keep presses running, and make die changes simple and efficient. Filter Valve - FV. Watch. Add a 0. Taking into consideration design features like cams and lifters can further complicate this. Randy Kerkstra recently published an article at the Plastics Technology site (ptonline. Product ejection is the last step in the plastic injection molding process. For Our Paid Online and offline A. We would like to show you a description here but the site won’t allow us. We have die handlers and motorized lifters for any need. As plastic fills the mold cavity, it compresses the air that is in the cavity. When the Injection mold opens, the lifter along the horizontal direction movement to make plastic parts out of the undercut. About. 0 piece. Slides, Lifters and. The cop-per alloys are: • C17200, high hardness beryllium-copper alloy • C17510, high. Why is that? Because the lifter is used at the final stage of producing plastics. Increasing cooling time may also help. 002-0. It's a single Nozzl. Our lifters reduce the amount of complex machining needed to incorporate a slide, lifter or cam into the mold. 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. The role of the guide device of the mold is to guide the upper mold and the lower mold to match in the correct position. DME Accualign lifters. Description. 6. This is when the molten plastic has been poured into the mold and is ready to be removed. Cavity-Lifter Injection Mold. These slides play a pivotal role in enabling the production of complex parts with undercuts, threads, and intricate features. Double Valve - VD. 0 /5 · 3 reviews ·This helps to make the injection force applied to both sides balanced. 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]. Plastic snap fit joint design. When you partner with Fictiv, your plastics project can use handloads instead of injection molding sliders or lifters. There are a few key advantages to plastic injection molding: High efficiency: Plastic injection molding is a highly efficient manufacturing process, with production rates of up to several hundred parts per hour. This mold was created for my Mold Design class with Mark Hill at Ferris State University. 2. As the name suggests, this is one of the most carefully done parting lines in plastic design. Progressive's UniLifters® System is the most widely used, standard product for molding and releasing undercuts. Every year, 55 million tons of plastic are processed to manufacture almost any kind of part. The proper solution for absolute precision positioning of press moulds during lifting operations. The product drawn is co. These companies are known for their advanced technology, innovative designs, and commitment to quality, and are leaders in the global injection molding industry. Roller/Ball Bars or Die Lifters are used to lift the rubber mold and provide a roller surface to easily roll the mold in and out during the rubber mold change. High Pressure - VH.