一开机就满模银纹，调机师傅熬到半夜。烘料省了这一步，量产全在补漏。
银纹不是模温问题，是料没烘干
TPE注塑成型工艺，参数是一张网：烘料、模温、料温、保压。结论先给：水分没排净，后面全白调——烘料，是成型的地基。
TPE注塑成型最大的坑：烘料这一步，省不得。烘料省了，银纹来了——烘料，是成型的头一关。
TPE注塑是工艺活：银纹、缺料都是问题。工艺对了，良率才稳——工艺活，别省步骤。
水分是银纹的源头，为什么先烘料
TPE 吸湿快，水分是银纹的源头。烘料测试写进工艺——不烘，就是问题。
烘料温度按牌号定：SEBS 基 60-80℃。烘料时间按厚度定：2-4 小时。
烘料不是形式：测含水率验收。水分低于 0.1%，才进料斗——含水率，是烘料的及格线。
模温、料温、保压，参数怎么配
模温：SEBS 基 30-50℃，TPV 40-60℃。模温低，熔接线明显——模温，是外观的线。
料温：SEBS 基 170-200℃，TPV 180-210℃。料温低，缺料——料温，是填充的线。
保压：按件大小调。保压低，缩水——保压，是尺寸的线。
SEBS基对阵TPV，注塑参数差多少
| 参数 | SEBS基 | TPV |
|---|
| 烘料 | 60-80℃ | 70-90℃ |
| 模温 | 30-50℃ | 40-60℃ |
| 料温 | 170-200℃ | 180-210℃ |
| 收缩率 | 1-2% | 1-2.5% |
| 用途 | 通用 | 耐油 |
表格读法：参数按体系分，别拿一套套全部——SEBS 基通用，TPV 耐油。
按体系调，参数才不偏。
开机无银纹，先核这四项工艺
| 项目 | 参数 | 判断 |
|---|
| 含水率 | <0.1% | 达标 |
| 模温 | 按牌号 | 达标 |
| 料温 | 按牌号 | 达标 |
| 保压 | 按件 | 达标 |
表格读法：含水率、温度、时间逐项对，水分一超标银纹飞边一起来——烘料温度时长按体系走，省一步都不行。
烘料，是成型的地基。
省烘料直接干，银纹气纹反复出
坑一：省烘料。颗粒潮着就上机，表面银纹和气泡跟着来——TPE带水成型，良率先掉一截。
坑二：参数乱调。银纹缺料——按牌号调。
坑三：含水率不测。银纹——含水率必测。
含水率、模温、料温——开机前问清
三问：什么体系、件多厚、什么外观要求。一验：试模良率实测——三问一验，供应商底细清楚。
烘料验证要先行：按树脂体系定温度和时长，含水率测到达标再上机。先做烘料，再谈良率——烘料，是成型的地基。
留样要成习惯：每批留样，参数按批次复测。批次换料先对比再放量——批次稳，客诉少。
银纹、气花、缺胶：故障对照一张表
| 现象 | 原因 | 对策 |
|---|
| 银纹 | 水分多 | 加烘料 |
| 缺料 | 料温低 | 升料温 |
| 缩水 | 保压低 | 加保压 |
| 熔接线 | 模温低 | 升模温 |
| 粘模 | 冷却不足 | 加冷却 |
烘料这一步省不得——含水进模，银纹、气泡、发雾全来。 干燥料斗温度按牌号调，烘到含水率达标才注塑；烘好的料密封防潮，吸潮就白烘。
TPE注塑料温比PP低，模温别照PP参数抄。 螺杆按TPE设计压缩比，排气不足制品表面烧焦；脱模斜度不够软胶粘模。
制品表面发花、银纹多，不是料差，是烘料和排气没到位。 工艺每一步都有用，省一步就出问题；参数窗口写进工艺卡按卡执行。
TPE是个“怕水怕烫”的软性子——烘不透她闹银纹，烘过头她降解。 温度按牌号调，冷却要均匀，不均就变形；试模先小批，参数确认再放量。
参数固化后，连续20模外观全过，银纹、烧焦零出现。 工艺参数记录归档，批次可追溯；成型问题记台账，同类先查台账。
TPE 注塑不是温度越高越好，软料粘模、硬料欠注，螺杆和温度窗口都要按体系调。
SEBS 基料温一般 160-200℃，温度过高分解发黏、过低表面发雾；模温偏高脱模爽，料筒残料要清干净再换色，软胶件别用太细浇口。
TPE 出粘模、飞边先别加锁模力，含水率和背压才是根。
TPE 吸潮粒料含水易银纹、易粘模；烘料按牌号，背压够才塑化均匀，软胶脱模斜度留够，小批试模外观和尺寸确认再放量。
TPE 注塑收尾验收：含水率、外观、小试尺寸三项随批走。
每批开机前测含水率，小批试模看银纹飞边和尺寸；参数按牌号锁档，换料先试模确认再放量。
注塑调机说到底，是把料温、烘料、保压三件事一次调顺。
料温按体系定，含水率测准再开机，保压浇口补缩跟上；每批留样看外观尺寸，确认再放量。
TPE 调机稳不稳，小批试模一跑便知。 银纹、飞边、粘模不出，尺寸压住，才把参数写进作业指导书。
科隆客户案例：批次色差被投诉，小批试产7天交付
常州一家注塑加工厂，TPE 注塑件批次色差明显，成品频繁被投诉。科隆配合小批试产验证后再放量，色差稳定，交付周期压缩到 7 天内。小批试产，把色差锁死在放量前——色差问题，先看色粉体系。
小结
TPE注塑成型的工艺，烘料先做，参数再调，烘料这一步省不得，烘料是地基。
三行说清我们是谁：
改性能——改性热塑性弹性体、改性尼龙（PA6 / PA66 / PA46 / PA11 / PA12 / PA6T / PA9T 及尼龙合金）、改性 PPO / PPS；
有货源——各大化工巨头尼龙树脂、副牌料、大包料现货；
给判断——什么件，用什么料。
As soon as it powers on, it's full of silver streaks, and the technician worked until midnight. Skipping this step during material drying means all the leaks have to be fixed during mass production.
Silver streaks are not a temperature control issue; the material wasn't dried.
TPE injection molding process, the parameters are like a net: drying material, mold temperature, material temperature, holding pressure. Here's the conclusion first: if the moisture is not completely removed, everything later turns white-adjusted — drying the material is the foundation of molding.
The biggest pitfall in TPE injection molding: the step of drying the material cannot be skimped. If you skip on drying, silver streaks will appear—the drying step is the very first hurdle in molding.
TPE injection molding is a craft: issues like silver streaks and material shortage are common problems. Only when the process is correct will the yield be stable—it's a craft, don't skip steps.
Moisture is the source of silver streaks; why dry the material first?
TPE absorbs moisture quickly, and water is the source of silver streaks. The drying test should be included in the process—if not dried, it's a problem.
The drying temperature is determined according to the grade: SEBS base 60-80℃. The drying time is determined according to the thickness: 2-4 hours.
Drying material is not just a formality: measure the moisture content for acceptance. Only if the moisture is below 0.1% can it enter the hopper—the moisture content is the pass line for drying material.
Mold temperature, material temperature, holding pressure—how to set the parameters
Mold temperature: SEBS base 30-50°C, TPV 40-60°C. Low mold temperature results in obvious weld lines — mold temperature affects the appearance lines.
Material temperature: SEBS base 170-200°C, TPV 180-210°C. Low material temperature, insufficient material—material temperature is the filling line.
Holding pressure: Adjust according to the size of the piece. If the holding pressure is low, shrinkage occurs—holding pressure is the key to dimensions.
SEBS vs TPV, how different are the injection molding parameters
| Parameter | SEBS-based | TPV |
|---|
| Material drying | 60-80℃ | 70-90℃ |
| Mold temperature | 30-50℃ | 40-60℃ |
| Material temperature | 170-200℃ | 180-210℃ |
| Shrinkage rate | 1-2% | 1-2.5% |
| Purpose | General | Oil-resistant |
Table reading: Parameters are divided by system, don't take all sets together—SEBS is general-purpose, TPV is oil-resistant.
Adjust according to the system, and the parameters won't be off.
No silver lines on startup, first check these four processes
| Project | Parameter | Judgment |
|---|
| Moisture content | <0.1% | Meet the standard |
| Mold temperature | By brand | Meet the standard |
| Material temperature | By brand | Meet the standard |
| Pressure holding | By piece | Meet the standard |
How to read the table: pair the moisture content, temperature, and time item by item. Once the moisture exceeds the limit, silver streaks and flash edges appear together — follow the system for drying temperature and duration; skipping a step is not an option.
Drying the material is the foundation of molding.
Skipping drying the roasted material results in the recurring appearance of silver streaks and air streaks.
Pitfall 1: Saving on drying materials. Running the machine with damp pellets leads to surface silver streaks and bubbles—TPE molding with moisture causes an immediate drop in yield.
Pitfall 2: Messing with parameters. Silver streaks due to lack of material — adjust according to the grade.
Pitfall three: Not measuring moisture content. Silver pattern — moisture content must be measured.
Moisture content, mold temperature, material temperature—ask before starting the machine
Three questions: what system, how thick the parts, what appearance requirements. One inspection: actual measured yield of trial molds—three questions and one inspection, the supplier's details are clear.
Drying verification must be done first: set the temperature and duration according to the resin system, and only put it on the machine after the moisture content meets the standard. Drying first, then talk about yield——drying is the foundation of molding.
Make sample retention a habit: retain samples for each batch and re-test parameters batch by batch. Before scaling up with a new batch of materials, compare first—stable batches mean fewer customer complaints.
Silver Lines, Air Bubbles, Glue Deficiency: A Fault Comparison Table
| Phenomenon | Reason | Countermeasure |
|---|
| Silver streak | Moist | Add roasting material |
| Lack of materials | Material temperature is low | Material temperature rise |
| shrink | Low hold pressure | Increase pressure |
| Fusion line | Low mold temperature | Die temperature |
| Sticking mold | Insufficient cooling | Add cooling |
You can't skip the step of drying the material—if moisture enters the mold, you’ll get silver streaks, bubbles, and hazing. Adjust the drying hopper temperature according to the material grade, and only inject mold when the moisture content meets the standard; store the dried material sealed to prevent moisture absorption, because once it absorbs moisture, you have to dry it all over again.
The molding temperature of TPE is lower than that of PP, and mold temperature should not just copy PP parameters. The screw should be designed for TPE compression ratio; insufficient venting causes burning on the product surface. If the draft angle is insufficient, soft rubber sticks to the mold.
The product surface has mottling and many silver streaks. It is not due to poor material, but because the drying and venting were insufficient. Every step in the process is necessary; skipping a step will cause problems. Process parameters are written into the process card and executed according to the card.
TPE is a 'soft-tempered' material that is 'afraid of water and heat'—if it's not baked enough, it develops silver streaks; if it's overbaked, it degrades. The temperature should be adjusted according to the grade, and cooling must be even; if not, it will deform. Trial molding should start with small batches, and parameters should be confirmed before scaling up.
After the process parameters are fixed, the appearance passes continuously for 20 molds, with no silver streaks or burning observed. Process parameters are recorded and archived, and batches are traceable; molding issues are recorded in a ledger, and similar cases should first be checked in the ledger.
TPE injection molding is not better with higher temperatures; soft materials stick to the mold, and hard materials are underfilled. The screw and temperature window must be adjusted according to the system.
The general temperature for SEBS base material is 160-200℃. If the temperature is too high, it will decompose and become sticky; if too low, the surface will fog. If the mold temperature is slightly high, demolding is easier. The residual material in the barrel must be cleaned thoroughly before changing colors, and soft rubber parts should not use gates that are too small.
For TPE, when experiencing sticking to the mold or flash, do not increase the clamping force first; moisture content and back pressure are the root cause.
TPE moisture-absorbing pellets easily develop silver streaks and stick to the mold; dry the material according to the grade, ensure sufficient back pressure for uniform plasticization, leave enough draft angle for soft rubber demolding, and confirm the appearance and dimensions with a small batch trial before mass production.
TPE injection molding final inspection: moisture content, appearance, and small trial dimensions are checked with each batch.
Measure the moisture content before starting each batch, conduct small batch mold trials to check for silver streaks, flash, and dimensions; lock the parameters according to the grade, and confirm with a trial mold before switching materials and increasing the quantity.
Ultimately, injection molding machine adjustment is about getting the material temperature, drying, and holding pressure all properly set at once.
Set the material temperature according to the system, measure the moisture content accurately before starting the machine, and maintain pressure to follow up on gate shrinkage; keep samples from each batch to check appearance and dimensions, and confirm before increasing the quantity.
Whether the TPE machine runs stably can be known after a small batch test mold. No silver streaks, flash, or sticking to the mold, and dimensions are controlled, only then are the parameters written into the work instructions.
Cologne Customer Case: Batch Color Difference Complaints, Small Trial Production Delivered in 7 Days
A plastic injection processing factory in Changzhou had noticeable color differences in TPE injection parts, and the finished products were frequently complained about. Cologne cooperated on small trial production to verify before mass production, stabilizing the color difference and reducing the delivery cycle to within 7 days. Small trial production locks the color difference before mass production—the color difference issue starts with the pigment system.
Summary
For TPE injection molding, drying the material is done first, then parameters are adjusted. The drying step cannot be skipped, as the drying is the foundation.
Three lines to explain who we are:
Performance modification—Modified thermoplastic elastomers, modified nylon (PA6 / PA66 / PA46 / PA11 / PA12 / PA6T / PA9T and nylon alloys), modified PPO / PPS;
Available supply—Stock of nylon resin from major chemical giants, secondary grade, and bulk materials;
Provide judgment—Which material to use for which part.
