件粘在模里取不出来，硬撬全报废。飞边先查流动性，别一上来就怪料。
粘模硬撬就废，流动性先查清楚
TPE 粘模飞边，流动性是头号线索：流动性、模温、冷却。结论先给：飞边先查流动性，别将就——流动性，是飞边的开关。
TPE粘模最大的坑：流动性跟不上，飞边和粘模一块冒出来——流动性，是粘模的钥匙。
TPE 成型是工艺活：脱模顺，良率才稳。工艺对了，问题才少——工艺活，别省调试。
流动性决定填充，为什么先看熔指
TPE 流动性随体系变：SEBS 基流动性好。流动性差，填充不足——流动性，是填充的开关。
粘模看模温：模温低，料冷粘模。模温按体系调——模温，是脱模的温度。
冷却看时间：冷却不足，脱模变形。冷却到位，脱模才顺——冷却，是脱模的收尾。
熔指、温度、压力，怎么配
熔指：熔指高流动性好。熔指按件选——熔指，是流动性的尺子。
温度：料温高流动性好。温度过高降解——温度，是流动性的油门。
压力：压力大填充好。压力过载飞边——压力，是填充的油门。
流动性对策，一张表对照清楚
| 现象 | 原因 | 对策 |
|---|
| 飞边 | 流动过强 | 降压力 |
| 缺料 | 流动差 | 升温度 |
| 粘模 | 模温低 | 升模温 |
| 粘模 | 冷却短 | 加冷却 |
表格读法：现象对原因，对策跟着走，流动性先测一遍。
先查流动性，再调参数。
脱模干净不粘模，验收核这四项
| 项目 | 要求 | 判断 |
|---|
| 熔指 | 按件 | 达标 |
| 模温 | 按体系 | 达标 |
| 冷却 | 到位 | 达标 |
| 脱模 | 顺畅 | 达标 |
表格读法：脱模一项项核，良率看得见，流动性那栏先过。
流动性，是粘模的钥匙。
一粘模就怪料，流动性没人测
坑一：先怪料。流动性没测就调机，飞边只会越压越多——流动性先测。
坑二：模温乱调。粘模——模温按体系调。
坑三：冷却不足。变形——冷却到位。
熔指、模温、脱模——调机前问清
三问：什么体系、熔指多少、什么模温。一验：试模良率实测——三问一验，供应商底细清楚。
流动性验证要先行：先把熔指和模温曲线摸清楚，再调注塑参数——流动性，是粘模的钥匙。
留样要成习惯：每批留样，脱模按批次复测。批次换料先对比再放量——批次稳，客诉少。
粘模、飞边、拉伤：故障对照一张表
| 现象 | 原因 | 对策 |
|---|
| 飞边 | 流动过强 | 降压力 |
| 缺料 | 流动差 | 升温度 |
| 粘模 | 模温低 | 升模温 |
| 粘模 | 冷却短 | 加冷却 |
| 脱模难 | 斜度小 | 加斜度 |
软胶件出模就粘在模上，工人用刀片撬，产量直接砍半——多半是模温低了。 模温跟体系走，TPE模温偏低就不肯脱模。
飞边先别加料，是流动过强。 降保压、降模温两三度观察几模，别一次调过头充填不满，细调比猛调靠谱。
缺料和飞边是两头：流动差就升料温，流动过强就降压力。 熔指按件配，厚薄件分开选熔指，别一个熔指打天下。
粘模是TPE的“恋家”，冷却没到位就舍不得脱模。 延长冷却时间、模温按体系校，脱模才顺，产量才上得去。
模温一次调2-3℃看几模再定，粘模良率从六成回到九成。 供应商能给温度窗口，才好合作，只卖料不调工艺的出问题自己扛。
粘模先看模温，TPE比PP低20-30℃脱模才顺。SEBS基模温30-40℃、TPV基40-60℃，模温高了软胶粘定模，工人用刀片撬产量直接砍半。
飞边大看熔指和保压，不是一味降压力
。熔指过高的充油料在分型面跑披锋，保压降5bar再观察两三模，薄件冷却时间延长到15秒以上脱模才顺。
脱模剂能不用就不用，模温跟体系走才是根本。SEBS基模温30-40℃、TPV基40-60℃，脱模剂喷多了表面发雾还影响二次粘接。
熔指按件配，厚薄件分开选熔指别一个熔指打天下
。延长冷却时间模温按体系校脱模才顺产量才上得去，降保压降模温两三度观察几模别一次调过头充填不满。
脱模剂能不用就不用，喷多了表面发雾还影响二次粘接。模温跟体系走SEBS基30-40℃，降保压降模温两三度观察几模别一次调过头充填不满。
科隆客户案例：包胶脱层返工高，调参数手感复现
马鞍山一家注塑加工厂，TPE 包胶件批量脱层，返工率居高不下。科隆配合调整注塑参数（模温/料温/保压），脱层消除，手感回弹对标样品复现。参数窗口锁死，脱层从源头断——包胶问题，先看基材再看参数。
小结
TPE粘模的调试，流动性先测，模温再调，飞边先查流动性别将就，流动性是钥匙。
The piece is stuck in the mold and can't be removed; forcibly prying it out will ruin it completely. Check the flowability first for flashing, don't just blame the material right away.
If you pry off a stuck mold forcefully, it will be ruined; first, check the fluidity.
TPE flash on the mold, fluidity is the number one clue: fluidity, mold temperature, cooling. Here’s the conclusion first: check fluidity first for flash, don’t compromise—fluidity is the switch for flash.
The biggest pitfall of TPE molding: poor flowability, causing flash and sticking to appear together — flowability is the key to molding.
TPE molding is a craft: only if demolding goes smoothly will the yield be stable. When the process is correct, there are fewer problems—it's a craft, don't skimp on debugging.
Liquidity determines filling, so why look at the melt index first
TPE liquidity changes with the system: SEBS has good basic liquidity. Poor liquidity leads to insufficient filling—liquidity is the switch for filling.
Check sticking to the mold by looking at the mold temperature: if the mold temperature is low, the material will be cold and stick to the mold. Adjust the mold temperature according to the system — mold temperature is the temperature for demolding.
Cooling depends on time: insufficient cooling causes deformation when demolding. Proper cooling ensures smooth demolding—cooling is the finishing touch of demolding.
Melt index, temperature, pressure, how to configure
MFI: MFI has high flowability. MFI is selected according to the item—MFI is a measure of flowability.
Temperature: High material temperature ensures good flowability. Too high temperature causes degradation — temperature is the accelerator of flowability.
Pressure: Fill well under high pressure. Overload leads to flashing—pressure is the throttle for filling.
Liquidity measures, clearly compared in one table
| Phenomenon | Reason | Countermeasure |
|---|
| Flying edge | Flow is too strong | Lower blood pressure |
| Material shortage | Flow difference | Increase temperature |
| Sticking mold | Low mold temperature | Die temperature |
| Sticking mold | Short Cooling | Add cooling |
How to read the table: match phenomena with causes, follow with countermeasures, and test liquidity first.
Check liquidity first, then adjust the parameters.
Demold cleanly without sticking to the mold, check these four items during inspection
| Project | Requirement | Judgment |
|---|
| melting point | By piece | Meet the standard |
| Mold temperature | According to the system | Meet the standard |
| Cooling | In place | Meet the standard |
| Demolding | Smooth | Meet the standard |
How to read the table: Check the demolding item by item, the yield rate is visible, and the liquidity column passes first.
Liquidity is the key to mold sticking.
The material is odd as soon as it sticks to the mold, and no one has tested its fluidity.
Pitfall 1: Blame the material first. Adjusting the machine without testing the flow can only increase flash — test the flow first.
Pitfall 2: Randomly adjusting mold temperature. Sticky mold — adjust mold temperature according to the system.
Pitfall three: insufficient cooling. Warping — cooling in place.
Melt index, mold temperature, demolding—ask clearly before adjusting the machine
Three questions: what system, what melt index, what mold temperature. One verification: actual mold trial yield measurement—three questions and one verification make the supplier's details clear.
Liquidity verification must come first: first understand the melt index and mold temperature curve, then adjust the injection molding parameters—liquidity is the key to sticking to the mold.
Making sample retention a habit: retain samples for each batch, and retest after demolding according to batch. When changing materials between batches, compare first before scaling up—the batch is stable, and customer complaints are few.
Sticking molds, flash, scratches: a troubleshooting reference table
| Phenomenon | Reason | Countermeasure |
|---|
| Flying edge | Flow is too strong | Lower blood pressure |
| Material shortage | Flow difference | Increase temperature |
| Sticking mold | Low mold temperature | Die temperature |
| Sticking mold | cooling short | Add cooling |
| Difficult to demold | Small slope | Add slant |
The soft rubber parts stick to the mold as soon as they are demolded, and workers use blades to pry them off, cutting the production output in half — most likely the mold temperature is too low. The mold temperature follows the system; if the TPE mold temperature is too low, it won’t release from the mold.
Don't add material to the flash first; the flow is too strong. Lower the holding pressure and mold temperature by two or three degrees and observe a few cycles. Don't adjust too much at once and end up with incomplete filling; fine adjustments are more reliable than drastic ones.
Shortage of material and flash are two extremes: if the flow is poor, increase the material temperature; if the flow is too strong, reduce the pressure. Match the melt index according to the part, select melt indices separately for thick and thin parts, don’t use one melt index for everything.
TPE tends to stick to the mold like it loves home; if it hasn't cooled enough, it is reluctant to release from the mold. Only by extending the cooling time and adjusting the mold temperature according to the system can demolding be smooth and production increase.
Adjust the mold temperature by 2-3℃ at a time, test a few molds before deciding, and the yield of sticky molds will go from 60% back to 90%. It's better to cooperate if the supplier can provide a temperature window; those who only sell materials without adjusting the process will have to deal with any problems themselves.
Check the mold temperature first when demolding; TPE needs to be 20-30°C lower than PP for smooth demolding. For SEBS-based materials, the mold temperature is 30-40°C, and for TPV-based materials, it's 40-60°C. If the mold temperature is too high, the soft rubber sticks to the fixed mold, and workers using blades to pry it off will directly halve the output.
Keep a close eye on melting finger and pressure holding, not just blindly reducing pressure
Excessively high melt index filled material causes flash along the parting line. Lower the holding pressure by 5 bar and observe for two or three cycles. For thin parts, extend the cooling time to over 15 seconds before demolding to ensure smooth release.
Release agents should be avoided if possible; the key is to follow the mold temperature with the system. For SEBS-based materials, the mold temperature is 30-40°C, and for TPV-based materials, it is 40-60°C. Excessive spraying of release agents can cause surface hazing and affect secondary adhesion.
Fuse according to each piece, select fuses separately for thick and thin pieces, let another fuse conquer the world
Extend the cooling time, adjust the mold temperature according to the system to demold properly for the production to improve; lowering holding pressure and mold temperature by two or three degrees, observe a few cycles to avoid over-adjusting at once and resulting in incomplete filling.
Avoid using release agents if possible; spraying too much can cause surface haze and affect secondary bonding. Follow the system for the mold temperature: SEBS-based 30-40°C. When reducing holding pressure, lower the mold temperature by two or three degrees and observe for a few cycles to avoid adjusting too much at once and having incomplete filling.
Cologne Customer Case: High Rework Rate for Overmolding Delamination, Parameter Adjustment Restores the Feel
At a plastic injection processing factory in Ma'anshan, TPE overmolded parts were delaminating in batches, and the rework rate remained high. Kolon assisted in adjusting the injection molding parameters (mold temperature/material temperature/holding pressure), eliminating delamination and restoring the tactile rebound to match the sample. The parameter window was locked, stopping delamination at its source—when it comes to overmolding issues, first look at the substrate, then at the parameters.
Summary
Debugging TPE mold sticking: first check the flowability, then adjust the mold temperature; check the flash for flowability first and don't compromise. Flowability is the key.
