375 inch; shorten the gate land to no. elimination of splay in injection molding by cavity pressurization author lord ha western electric co. 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. Thick sections take longer to cool than thin ones. Remedies: Pre-dry the plastic properly before molding. March 3, 2017 Leave a comment. There have countless "lookalike" defects, and many possible causes of splay, including excessive mold lubrication. Reduce ash content. Remedies: Reducing the injection speed will allow the plastic flow front to stay together and not form the individual streams that cause the. The Troubleshooter, Part 45: Eliminating shear splay. Figure 1 is the part before heating. proposed that surface defects, such as splay marks and silver streaks, are. Splay can be a costly problem in the production of your molded components. Don't forget to take a step back and take a look at what's going on with your injection molding machine as a whole. com. Step 1 – Develop a Scientific Molding Process. Scars or surface defects on injection molding arising from two main mechanisms. Well, what this simply implies is that injection polycarbonate molding makes it possible for you to create a wide range of part sizes. Through intensive machine time and use of our unique injection molding simulator SimTech™, ProMolder 3 is the most thorough and technically accurate training available. These are molding defects that can occur in the manufacturing process of plastic injection molding. Injection Molding Processing Guide. Our medical molding operations provide class 7 cleanrooms with horizontal and vertical medical injection molding machines to support cost-effect, tight tolerance parts to market in a timely manner. Most drying specifications for various resins are at temperatures where the resin will not. 3. A cosmetic defect, it is often silvery in color and is sometimes called ‘silver streak’s. 11 ref. 8 : 1 and 2. This manual, A Guide to Polyolefin Injection Molding, contains general information concerning materials, methods and equipment for producing high quality, injection molded, polyolefin products at optimum production rates. com and a consultant/trainer in plastic injection molding. The web page provides tips on drying, temperature, pressure, speed and mold details for different types of splay. Although, aluminum has been proven as a reliable mold material for production injection molding. The three main causes of splay are heat, moisture, and shear. Splay is sometimes also called “silver streaks” because of the appearance of silvery scratches across the surface of the injection molded part. Heat splay, caused by degradation or hang- up, looks similar but is often accompanied by black specks or yellowness. Here are some common fixes for injection molding splay: Moisture-related: Ensuring that all material is thoroughly dry before beginning the injection mold process is crucial. Allows you to accommodate a variety of part sizes. 30-30 Melt temperature Rule Procedure: Spray the probe with mold release Heat the probe 30 F above the front zone temperature. The material pumped out of the cylinder is foamed and shows blisters on the injection molding parts surface. Injection Molding Problems and Solutions (14/17) – Splay Marks. If burning or flashing occurs, the injection speed is too high and delamination is being caused by other factors. The best way to avoid these part defects is to work with a plastic injection molder that has a great deal of experience with various resins and their applications. Located in the heart of Silicon Valley since 1974, we understand the performance expectations of cutting-edge companies delivering innovative technologies. 2. How to Prevent Common Failure Modes in Injection Molding. Flow lines appear as a wavy pattern on the surface of your plastic parts. To lay open the end of a tubular structure by making a longitudinal incision to increase its potential diameter. Injection molding BrE or Injection molding AmE, is a manufacturing process for producing parts by injecting molten material into a mold. Figure 2 is a part tested a few minutes after molding and Fig. 2K. Warping. Olmsted, Martin Davis. Appearance alone cannot tell you which type of splay is present. Thermoplastic resins fall into two distinct categories, each with their own advantages and disadvantages. . • Ability to recognize molding defects, such as shorts, splay, burns, flash, color swirls, and contamination. “Splay,” which refers to a specific flaw that emerges on the surface of molded objects, is. How You Will Benefit: Splay, blush & peel are very common rigid PVC molding defects. There are two kinds of splay: moisture splay and heat splay. Vertical walls, meaning those part surfaces parallel to the direction of mold operation, should have a minimum draft angle of a 1/2 degree, and 2 degrees is even better; heavily textured surfaces may require 5 degrees or. Splay Marks can be defined as a “splash-like” appearance (or spray pattern) on the surface of a molded part. Published by GMW on March 1, 2018. What is Splay? One of the most common injection molding defects is. An opening in the mold where the injection-molded material enters the mold to create the intended plastic part. To decide on the likely cause(s), test each to prove/disprove. remove the plate suction tube damaged → replace the damaged suction tube or repair. The presence of gloss and/or texture in the tool can make what would otherwise be an exact color match appear very different. I give you 4 different variables that can cause splay. Cleaner for Mold; Repair for Mold; Heating Items. This time we’re going to take a look at Splay. Mold leaks also can cause moisture-related splay, so check the mold carefully for any signs of damage or leakage. 02% moisture. . A reduction of 10 – 25% is usually achieved in. You can purchase the book on Amazon: Injection Molding – Advanced Troubleshooting Guide: The 4M Approach. Use materials with better fluidity (*b) After changing these conditions, the holding pressure actually applied to the cavity will increase, making pitting less prone. These data were obtained from many and Splay can be a costly problem in the production of your molded components. Make the injection speed lower; Debris in the. What is Splay? Silver or white streaks appearing on the surface of the part often indicate. , leading to a relatively infusible state. When two materials can’t bond together, it results in separation that very quickly becomes delamination. If you round up a bit, the viscosity at the fastest speed, a fill time of 0. Paulson’s most advanced injection molding course. 5. 508-520-0011 Fax: +1. Increase the injection speed. Splay can be more obvious on black parts, but this plastic molding defect can be found in pretty much any injection molding material, any color. Proper resin is a function of time/temperature. injection molding process was carried out by varying important processing parameters of mold temperature, injection speed, packing pressure and melt. Plastic 411 offers articles, information and training resources to the plastic injection industry. Synonimy słowa splay i jego tłumaczenie na 25 języków. Plastic injection defects can lead to large scrap events and lost profits, and splay is one of the more frequent defects a processor must correct. C. 7. Molasses is thick, and flows slowly. Inadequate support for the sprue bushing can transfer pressure to the parting line, too. Brittleness can be defined as the tendency of a molded plastic part to break or crack under conditions in which it would not normally do so. Splay is a cosmetic defect that occurs when moisture gets into the resin. The Plastic is Cooling Too Quickly: The presence of jetting might mean you have another issue: plastic is cooling too quickly within the mold. Thicker mold walls enhance the formation of foam. Sink Marks. This type of injection plastic defect occurs as small depressions or recesses. This causes splay, which is a visual defect, but also creates a weak part due to brittleness. Splay is a defect similar to blisters that is caused by escaping gas or water and which affects the surface of. It requires a significant capital investment and a relatively long lead time to machine the tools. If the barrel temperature is too high or the heating is imbalanced, the barrel temperature should be lowered step by step. Symptoms/problem: Swirls and gloss on the part’s surface. Injection molding moisture steak. Injection molding offers numerous advantages when it comes to producing HDPE parts, such as cost-effectiveness, high customization, and high malleability. A good comparison would be the difference between molasses and water. Black specks, splay, color swirls, brown streaks are all molding issues that can often be attributed to poor purging. The Role of Moisture in Injection Molding Splay Defects. Use the data to calculate relative shear rates and relative viscosities: Relative Shear Rate = 1 ÷ fill time. Due to Microsoft's end of support for Internet Explorer 11 on 15/06/2022, this site does not support the recommended environment. The moisture and volatile content in the raw material is. When purchasing plastic injection molded parts. 200 psi. Excessive injection pressure creates stress that causes product warpage in the mold. Gate size. The plastic pellets are heated until they are liquid. Drying of plastic resin can be a key step in the injection molding process, since too much moisture can cause a number of processing problems. The goal is to. Hubs offers any type of SPI surface finish, such as A-1, D-2 or D-3. The Society of the Plastics Industry [spi] PDF Price. Jetting, also known as jet, worm track, or snake-like pattern, refers to the snake-like curves on a plastic injection molded part along the flow direction from the gate, as shown in Figure 1. com and a consultant/trainer in plastic injection molding. Appearance alone cannot tell you which type of splay is present. This cosmetic defect occurs in plastic injection molding, when silver or white streaks appear on the surface of the part face due to air, contamination, heat, moisture, or shear issues. CRC Press, Mar 14, 2001 - Technology & Engineering - 232 pages. The principle of hot/cold molding technology is to raise the mold-cavity surface temperature prior to the polymer entering the cavity, and to subsequently cool the mold cavity once filled, just like in conventional injection molding (see Fig. Here are 3 common injection molding flaws and how to prevent them from happening in the future: Flow Lines. ,princeton nj,usa source pactec '79. Injection Molding Flash Occur Causes. MISUMI | Your Time, Our Priority. R4:The position of the take-up plate is not correct. D. • Melt too hot Splay • Injection too fast • Gates too small • Barrel temperature profile wrong. The maximum weight reduction which can be achieved greatly depends on the individual mold shape. Splay is a term used in the manufacture of injection molded plastics to refer to off-colored streaking along the surface of a molded part. A desiccant drier should be used to dry the polycarbonate products to less than 0. As the plastic fills and pack the mold, part take shape and begin to cool. The material temperature could also be raised to accomplish the same effect. Reporting to Shift Supervisor, the successful candidate will operate Molding presses and related equipment for the purposes of fittings production. Too cool a melt. This work focuses on the factors critical to successful injection moulding, including knowledge of plastic materials and how they melt, the importance of mould design, the role of the screw, and the correct use of. He is a highly respected writer and educator in the area of plastics processing. For a more uniform polymer melt and mixing, screw I-JD (length to diameter) ratio should be at least 20:1 with a compression ratio of at least 2. Splay is one of the more common — and sometimes baffling — defects in plastic injection molded products. The recommended injection molding temperature for common plastic should also be adhered to. Wait 30 seconds and record temperature shown on the instrument. Clean the molding cylinder thoroughly; 3. That degradation creates a gas, which is. Weld lines are injection molding defects that can be mitigated by a number of tactics that depend on your part design. In fact, viscosity is influenced more by shear rate—injection speed—than temperature or even resin lot variations. Splay is characterized by light colored streaks in the part that usually follow the direction of the melt flow. Process: (1) Reduce the injection pressure and speed. If the only solution is to use a spray, try our Tuff-Kote and Dri-Kote high-performance mold-release sprays. Flow Lines. Use of a slip-ring type non-return valve with clearances of at least 3. Ada banyak penyebab yang lebih mungkin, tapi perlu informasi lebih lanjut dan benar Cacat jenis sebenarnya injeksi. [1] The most common cause of splay is moisture, which is caught in the resin inside the injection molding machine during the heating. COCs low shrinkage, lubricated grades and mold. The turbulent flow whips air into the polymer, creating micro bubbles. 3. The process begins with the mixing and melting of resin pellets. . As a raw material for injection molding, HDPE is an excellent choice. Splay is defined here to include any defects that appear as smeared material or bubbles on the part surface, usually oriented in the flow direction. Bob Hatch is manager of technical service and customer support for Prime Alliance, the Des Moines-based resin distributor. With the same gate diameter and injection speed, the higher the viscosity of the resin (the lower the fluidity ), the. Flow lines are off-color lines, streaks, and other patterns that appear on the surface of a part. Injection Molding: How Backpressure Adjustments Influence Shot Size Raising backpressure results in increasing shot size, which can cause a host of other problems. There only needs to be a very tiny amount of water in the material for steam to form during molding. Moisture is a major. 00 Select options; Atlanta, GA. The three main causes of splay are heat, moisture, and shear. Lower melt temperature; The mold gate is too small, injection speed is too fast. I give you 4 different variables that can cause splay. Increase gate size; 2. A material that will undergo or has undergone a chemical reaction by the action of heat and pressure, catalysts, ultra-violet light, etc. Material- ABS Barrel Temperature- ~240 Celsius Pre-drying- 80-90 C for 3 hours The streaks do not come over whole part but only at a single location at the end of fill each time. The chart below shows recommended wall thicknesses for common injection molding resins. Over drying can also lead to multiple defect conditions. He can be reached at (414) 369-5555, Ext. Cause #2: Material. Splay is a aesthetic defect that occurs in plastic injection molding, when gray or white streaking pop at the surface of the part. The rounding of the corner on the graph relating rate of renal tubular secretion or reabsorption of a substance to its arterial plasma concentration. 2. 2. Take a good look at part design. sales@uninko. For example, injection speed may need to be adjusted to counteract splay created by shear stress, which can be caused by the shape of the part. Haze on the one side of the preform. Smooth out the corners and sharp turns in the mold design to avoid sudden changes in melt flow. Increase the mold temperature and reduce the barrel temperature for injection molding of thin-walled products. Adjust improve product quality such as removing blush, splay, flash, short shots and resolving. The strong molecular. 39 sec, is about 2000 psi-sec. B. These are caused by the shot of molten plastic moving at different speeds throughout the injection. JSW, one of the industry's original leading companys, has extensive experience in manufacturing large electric injection molding machines ranging from 550 to 3000 metric tonnes. i-Moulder injection molding defects and remedies problem solving guide and indicates typical methods for fine tuning the plastic injection moulding machine to reduce the occurrence of common molding problems including:-. Syn-Lube can be wiped thin and evenly, which helps prevent bleeding issues. Faster, and even more accurate, the J-ADS Series assures the highest levels of. While in process it will be helpful if you check the melt flow pattern by running a few short shots to see if the plastic is jetting around on itself which will cause a pocket to form. 1 Caused By The Quality of Injection Mold. Over Applying Rust Preventative. It owns the name silver streak because of the appearance of silvery scratches on the injection-molded part's surface. Using a turnkey manufacturer, who also builds and maintains the mold, can help avoid any costly machining charges or mold replacement. 572. Gas will mix with plastic melt if the high. In addition, mold plumbing should be checked to ensure there are no. [1] The most common cause of splay is moisture, which is caught in the resin inside the injection molding machine. The cost of injection molding is in three places, cycle time, mold construction, and setup costs. If there is flash on the short shot, we can focus on parameters affecting first-stage injection. Solution: Ensure the nylon is properly dried; increase dimensions in edge gate, sprue O-diameter, and nozzle orifice; relocate edge gate to the center. In addition, it is important to note that nylon is not only affected by poor drying/ moisture conditions. 14 billion, up 12. the following below are explained 1. Too cold in the rearInjection Molding of Multimaterial Systems. • Estimated clamp tonnage of 5. Multiple gating, higher flow rates, and gate resizing along with higher material temperatures, may improve merging, move lines to non-cosmetic locations, or provide more uniform cooling temperatures to bring materials together before solidification. Splay caused by moisture. Watch the YouTube presentation below for information about Plastic411. Figure 2 shows the part after testing, and you can now see a depression or sink. What Are Silver Streaks in Injection Molding? A silver streak, also known as a splay mark, is a cosmetic defect that is typically visible on plastic parts with a smooth surface. (2-3) High viscosity / low fluidity. What causes splay in plastic injection molding? Moisture and shear are the two primary causes of splay on an. Sink marks usually occur when there’s a shrinking of a molded component’s inner part. 39 sec, is about 2000 psi-sec. Splay due to moisture usually results in silver streaks on the surface and slight delaminating of a film layer. The material supplier is the best source for this information. To determine whether you’re looking at bubbles or voids, slowly heat the area with a torch or heat gun. The root cause of sink marks is a difference in cooling time between the. Suppose the moisture or reactive content of the injection molding raw material exceeds the norm. Moisture and shear are the two primary. Splay is a cosmetic defect so occurs in plastic vaccination molding, when color or white streaking appear on the surface of the part. Burns in injection molding are, quite literally, burns. 1. Troubleshooting Guide for Injection Molding. Verify that the process itself has been decoupled first, yielding a 95-98% full part with no hold or pack added. fFlow rate. Moisture turns to steam when heated in the injection unit, and these steam pockets interfere with molecular bonding of the plastic. 005mm for all molds and well-made injection molded parts. High injection speeds lead to shear splay since the material is exposed to high shear conditions. San Jose facility includes: 55,000 sq. Splay is a cosmetic defect that occurs in plastic injection molding, sometimes we also call it “silver streaks” because of the appearance of silvery scratches across the surface of the. 0 Comments: Post a Comment << Home. A cosmetic defect, it is often silvery in color and is sometimes called 'silver streak'. Splay can be caused by a variety of variables, and recognizing these sources is critical for resolving and preventing the issue. Educalingo cookies are used to personalize ads and get web traffic statistics. This three-part series in the Troubleshooter column outlines key signs used to evaluate splay conditions. Advertisement. Place the heated probe into the melt puddle (Purging mass). The resulting defect, known as splay or silver streaking, is an indicator that the material being molded contains too much moisture. Check injection throttle position and if possible, increase its setting. (2) Reduce the barrel temperature. Injection molding offers numerous advantages when it comes to producing HDPE parts, such as cost-effectiveness, high customization, and high malleability. So what does the 140F mold temperature give us? The molding technician thought the 140F mold water was OK because the data sheet provided by the material supplier suggested mold temperatures from 75 to 180F. POSSIBLE SOLUTIONS 1. In that case, the material particles. Injection. Our ISO Class 7 (10,000) clean room is equip. Gas Marks Defined. Injection molding is an invaluable process for creating plastic parts. Where are many "lookalike" bugs, and many possibly drives about splay, including exorbitant mold lubrication. Preventing Flash in Injection Molded Parts. Remedies: Vent the mold by grinding thin (0. The defect detection tool then identifies any anomalous parts, detecting both functional and cosmetic defects. In Figure 1 you can see the bubble; it looks like a gas bubble, right? Most would assume so. MOS Plastics 2308 Zanker Road San Jose, CA 95131 Phone: 408-944-9407Packson is not totally the same as other medical plastic injection molding companies. Simple Manufacturing DG Ltd （Plastic injection molds/moldings in Automotive, Medical, Plumbing, Consumer electronics etc). Usually oblong, silvery surface streaks which are open in the shapre of a U counter to the direction of flow. Splay. Garrett MacKenzie | Mar 12, 2023 In the injection molding process, the. A gas mark is a fault that grows in the direction that melt plastic flows on a product's surface resulting from gas interference during the filling process. Appearance alone cannot tell you which type of splay is present. Splay can be a costly problem in the production of your molded components. So called because in passing through the sprue orifice it is cooled below the effective molding temperature. com. Splay (also called chicken tracks, tails, and hooks) is usually caused by a gas, usually water (steam), but can be caused by unmelt, dirt, chips, or flakes from three-plate molds, cold slugs, excessive volatile additives, air, and/or decompression. 1. 2. Splay can be caused by a variety of variables, and recognizing these sources is critical for resolving and preventing the issue. 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. injection molding machines using standard industry practices . Increase injection pressure. Controlling the switchover from first to. To decide on the likely cause(s), test each to prove/disprove whether it is causing the splay, then take the corrective action. By contrast, a slow injection speed will give you a matte finish and a cold mold, such as 50F, will give you a more flexible part. Slower, controlled speeds allow for smoother laminar flow that prevents air entrapment. Custom Plastic Injection Molding Process - Basic Defect Identification and Troubleshooting . 4. Add vents in local areas that show blush. Add to Alert. Increase size of the vents. Pack/hold: 150 psi vs. Splay or streaking is often a silver color and may look like mica. Znaczenie słowa splay w słowniku w słowniku wraz z przykładami użycia. Setting too high a temperature can prevent the gate from sealing properly and on time. 375 Victoria Road Austintown, OH 44515 USA (330) 726-4000. The volatiles vaporize and contact with the surface of the mold and become silver. Clamp tonnage / High pressure is too low. Before his present assignment, Bob managed a molding operation for 25. Fill pattern animation. Splay is a cosmetic defect that occurs in plastic injection molding, when silver or white streaks appear on the surface of the part. Before his present assignment, Bob managed a molding operation for 25. Contamination can be defined as an imperfection in a molded part caused by the presence of a foreign object or material that is not part of the original molding compound. It will also profile key analysis. 5 sec for ABS/PC. Flow marks are most commonly caused by resin cooling too quickly or improper gate location. The Troubleshooter’s notebook. Optimize temperature settings of the molding machine to avoid material degradation. Silver Streak Analysis & Troubleshooting (1). Injection molding is particularly rough on polymers because in addition to the barrel temperatures required to soften the material, there can be significant shearing forces applied to the material to move it rapidly through the machine nozzle and into the mold cavities. Gas Marks Defined. The melt holds enough temperature to maintain a low enough viscosity. Using a turnkey manufacturer, who also builds and maintains the mold, can help avoid any costly machining charges or mold replacement. Voids are instances of plastic shrink that creates a vacuum in the plastic wall stock. Speaking the same “language” on the production floor, streamlines communications between employees and between shifts. He has provided process-engineering expertise to many top companies, including Glock, Honda, Johnson Controls, and. The best way to avoid these part defects is to work with a plastic injection molder that has a great deal of experience with various resins and their applications. com and a consultant/trainer in plastic injection molding. Flow marks caused by chaotic jet flows. It also provided relief from splay and paint-adhesion problems. Injection molding is a process that utilizes a molten material that is forced into a mold to form a part. This is an excerpt from Lesson #6 in Paulson's Injection Molded Part Problems and Solutions training progam - Splay (or Silver Streaks) and how to fix them. 5: l. The higher requirement on the surface finish of the part, the longer effort and time spent during the production of the mold, hence it will lead to higher cost on your overall cost. If you turn on the spigot to a garden hose, you will hear a hissing sound at the nozzle end for the first few seconds. Lower the hold pressure fix the PET preform mold. Haze develops when PET in either injection or blow stages is heated beyond about 115°C (240°F) and allowed to cool down for even a short time. Studying read about how in identifies and address splayWeldlines Splay Jetting Burn Marks Warpage. Bob Hatch is manager of technical service and customer support for Prime Alliance, the Des Moines-based resin distributor. Cosmetic Specifications of Injection Molded Parts, Revision A. Problem: Shear-sensitive material; gate land length much too long; and barrel temperatures, in an effort to eliminate gate blush, were raised too high. Here are a few practical solutions that can help better handle a sink mark in molded products: The cooling time should be kept to a minimum to prevent the deformation of the injection-molded pieces. Learn more about how to identify and address splayPrecision Thermoplastic Injection Molding in Class 8 Clean RoomThe Role of Moisture in Injection Molding Splay Defects. The following parameters should be evaluated for all projects when conducting a design for manufacturability evaluation in plastic injection molding: Maximum pressure: filling. If it’s a bubble, the wall stock will swell due to the gas inside expanding. Its primary function—as the name suggests—is to act as a trap, or “well,” for the cold slug. If it’s breaking down and bleeding around ejector pins, your parts will likely be contaminated. Set a higher clamping presure. Source: Author jmoutoux. In Figure 1 you can see the bubble; it looks like a gas bubble, right? Most would assume so. . txt) or read online for free. Previous Posts . Recognize and recommend corrective actions for tooling issues. About the Author: Robert Gattshall has more than 22 years’ experience in the injection molding industry and holds multiple certifications in Scientific Injection Molding and the tools of Lean Six Sigma. A. Increase injection speed. Abstract. 375 inch; shorten the gate land to no. 080" – 0. Plastic injection molded parts can be surface finished from matte to highly polished. Splay / Shear. See our Product List. Injection Molding Skills & More. . A cosmetic defect caused by moisture in the resin or injection molding machine screw rotation or the movement of. It owns the name silver streak. The special version of its J100ADS has optional integrated magnetic platens and powder-coated surfaces for medical molding. Mixing Nozzles, Standard Nozzles, Insulated and Standard Heater Bands, Thermocouples, etc. It is these steam bubbles that you see as Splay. Medical utensils often. 008 to 0. In thermoplastic injection molding, the mold is always said to be “cold”—that is, relative to the temperature of the plastic melt. Start the fill at a very. Injection molding Cycle. . Therefore injection mold core and cavity surface finish are as per the specified part drawing. This article continues our series of troubleshooting reports from one of the leading on-the-spot problem solvers in the molding industry. The cold slug well received that plug of solidified plastic on the next shot. Low Gloss. Clamp force estimation. It usually appears at the gate where the plastic enters the mold. 508-520-0011 Fax: +1. . disadvantages 9. Parts stick in the mould, Flash, Poor Weld Lines, Burn marks, Short Shots, Pit Marks. Method of switchover from first to second stage. Flash can be caused by parting line mismatch in the tool. 7 Million Products, 2,000 Brands. Splay or streaking is often a silver color and may look like mica. Solution: Ensure the nylon is properly dried; increase dimensions in edge gate, sprue O-diameter, and nozzle orifice; relocate edge gate to the center. Synonyms for splay and translation of splay to 25 languages. Identifying splay can be challenging, as its appearance may resemble other defects such as surface scratches, scuffs, flow lines, contamination-related delamination, or flaking, all. Learn about 10 common plastic injection molding defects, find out why they occur, and get tips to fix them. 3. Repeat Step 3 until the fill time is over 10 sec. Reduce Splay Defects and White Streaks in Your Injection Molded PartsMOS Plastics is a division of KS Group and specializes in high-precision prototyping, injection molding, contract manufacture, and assembly for Healthcare and electronic OEMs. Reposition gates and runners to allow resin to flow around the obstruction from a different direction. इस वीडियो में इंजेक्शन मोल्डिंग से सम्बंधित एक डिफेक्ट silver mark/streaks के बारे में. Learn how to identify and fix splay with Nanoplas products and troubleshooting guide. Injection Molding The process of forming a material by forcing it from a heated cylinder, under pressure, through a spruce into a cavity of a confined mold.