一开机就满模飞边，修边修到天黑。料没烘透，注塑压力再大也压不住。
飞边压不住，不是锁模不够是料没干
TPE 干燥烘料，温度和时长都要对：温度、时间、含水率。结论先给：水分带进料里，银纹气泡一起来——含水率，是烘料的及格线。
TPE干燥烘料最大的坑：注塑压力大，飞边压不住。水分带进料里，飞边银纹一起冒——含水率，是烘料的及格线。
TPE 烘料是工艺活：含水率达标，成型才稳。工艺对了，良率才稳——工艺活，别省步骤。
水分是飞边的源头，为什么先除水
TPE 吸湿快，水分是飞边银纹的源头。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。
注塑压力、保压、飞边，怎么配
注塑压力：压力大填充好，压力过载飞边。压力按件调——压力，是填充的油门。
保压：保压补缩水，保压过高应力。保压按件调——保压，是尺寸的稳定器。
飞边：飞边查锁模力和含水率。锁模不够，飞边压不住——锁模，是飞边的闸门。
烘料参数，一张表对照清楚
| 体系 | 温度 | 时间 |
|---|
| SEBS基 | 60-80℃ | 2-4h |
| TPV | 70-90℃ | 2-4h |
| TPU | 80-100℃ | 3-4h |
| TPEE | 90-110℃ | 3-5h |
表格读法：SEBS基和充油料烘法不同，温度时长逐体系排——含水率不达标，调机也压不住缺陷。
按体系烘，水分才除净。
开机无飞边，先核这四项
| 项目 | 要求 | 判断 |
|---|
| 含水率 | <0.1% | 达标 |
| 温度 | 按体系 | 达标 |
| 时间 | 按厚度 | 达标 |
| 锁模力 | 按件 | 达标 |
表格读法：烘料温度、时间、含水率逐项测，潮气排净再上机——料干不干，决定后面的良率。
含水率，是烘料的及格线。
省烘料直接干，锁模再紧也飞
坑一：省烘料。潮料直接注塑，表面银纹和缩水一起来——烘料这道工序，跳一步都补不回。
坑二：锁模力不够。飞边——锁模必查。
坑三：含水率不测。银纹——含水率必测。
含水率、温度、时间——开机前问清
三问：什么体系、件多厚、什么锁模力。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：按树脂定温度时长，含水率测到达标再开机。先除水分，再谈压力——含水率，是烘料的及格线。
留样要成习惯：每批留样，含水率按批次复测。批次换料先对比再放量——批次稳，客诉少。
飞边、缺胶、银纹：故障对照一张表
| 现象 | 原因 | 对策 |
|---|
| 飞边 | 含水率高 | 加烘料 |
| 飞边 | 锁模力低 | 加锁模 |
| 银纹 | 水分多 | 加烘料 |
| 缺料 | 压力低 | 加压力 |
| 缩水 | 保压低 | 加保压 |
含水率达标才进料——烘不到位，银纹、气泡、水解一起来。 干燥料斗温度按牌号调；烘好的料密封防潮，吸潮就白烘。
烘料写进工艺卡：温度、时间、含水率三步核。 换料先对比烘料窗口再谈价格；料斗密封管好，烘完别敞口放。
烘完再吸潮，等于没烘——问题不在烘料设备，在转运密封。 螺杆按TPE设计压缩比；注塑压力和锁模力平衡，压力大飞边压不住。
TPE“怕水”——烘料是她进模前的醒神，烘不透银纹就找上门。 温度按牌号调；含水率测试按标准做，数据核过才开机。
含水率控制到位后，连续生产银纹零出现。 烘料记录归档；人员操作一致，同类问题先查台账。
TPE 多数本身不吸湿，但充油、吸潮粒料吸了水，注塑就银纹、粘模、发花。
烘料温度按牌号，一般 60-80℃、两到四小时；烘好密封防潮，敞口放一下午等于白烘，料斗带保温才稳。
烘料验收看含水率，不是看烘多久。 含水率测准了再开机；料斗保温管好，换色换料先清料筒；每批留样测外观，银纹、气泡消失再放量。
烘料收尾验收：含水率、料斗保温、换色清筒三项随批走。
含水率测准再开机，料斗保温管好，换色换料先清筒；每批留样看银纹气泡，消失再放量。
烘料说到底，是把含水率、料斗密封、清筒三件事一次管好。 温度按牌号 60-80℃ 烘两到四小时，烘完密封防潮；含水率测准再开机，换色换料先清筒。
科隆客户案例：收缩率不稳尺寸飘，小批试产续三单
重庆一家注塑加工厂，TPE 件收缩率不稳，尺寸波动大。科隆配合小批试产验证后再放量，尺寸稳定，客户连续三个批次续单。小批试产，把尺寸锁死在放量前——尺寸问题，先看烘料再看参数。
小结
TPE干燥烘料的工艺，水分先除，压力再控，注塑压力大飞边压不住，含水率是及格线。
十几年，只做一件事：把尼龙改成能用的样子。
PA6、PA66 是基本盘，PA46、PA6T、PA9T 是耐高温的门槛，PA11、PA12 管水路和油路，尼龙合金补单一树脂给不了的平衡。改性热塑性弹性体、改性尼龙、改性 PPO、PPS 并行，还有各大化工巨头的尼龙树脂、副牌料、大包料现货。
同一块料，用错地方就是事故。所以先问件，再问料。
As soon as it's powered on, the mold is full and the edges fly; repairing the edges continues until dark. The material hasn't been dried through, and no matter how high the injection molding pressure is, it can't be controlled.
The flash cannot be controlled; it's not that the mold clamping is insufficient, but that the material is not dry.
TPE drying and baking: both temperature and duration need to be right—temperature, time, and moisture content. Conclusion first: if moisture gets into the material, silver streaks and bubbles appear together—the moisture content is the passing line for drying the material.
The biggest pitfall of drying TPE before feeding: high injection pressure makes it impossible to control flash. Moisture enters the material, and flash with silver streaks appears together — moisture content is the pass line for drying.
TPE drying is a process task: only when the moisture content meets the standard will the molding be stable. When the process is correct, the yield will be stable—it's a process job, don't skip steps.
Moisture is the source of flash, so why remove the water first?
TPE absorbs moisture quickly, and moisture is the source of flash silver streaks. Including drying tests in the process—if not dried, there will be problems.
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: moisture content must be measured for acceptance. Only when the moisture is below 0.1% can it enter the hopper—moisture content is the passing line for drying material.
How to match injection pressure, holding pressure, and flash
Injection molding pressure: High pressure fills well, excessive pressure causes flash. Adjust the pressure according to the part — pressure is the throttle for filling.
Holding pressure: compensate shrinkage during holding pressure, excessive holding pressure stress. Holding pressure is adjusted item by item—holding pressure is the stabilizer of dimensions.
Flash: Check the clamping force and moisture content for flash. If the clamping force is insufficient, the flash cannot be pressed down—clamping force is the gate of the flash.
Drying parameters, clearly compared in one table
| system | Temperature | Time |
|---|
| SEBS-based | 60-80℃ | 2-4 hours |
| TPV | 70-90℃ | 2-4 hours |
| TPU | 80-100℃ | 3-4 hours |
| TPEE | 90-110℃ | 3-5 hours |
Table reading: The baking methods for SEBS base and filled materials are different, and the temperature and duration are arranged according to each system—if the moisture content does not meet the standard, adjusting the machine also cannot suppress the defects.
Bake according to the system, only then will the moisture be completely removed.
No burrs when starting up, first check these four items
| Project | Requirement | Judgment |
|---|
| Moisture content | <0.1% | Meet the standard |
| Temperature | According to the system | Meet the standard |
| Time | By thickness | Meet the standard |
| clamping force | By piece | Meet the standard |
How to read the table: Measure the drying temperature, time, and moisture content item by item, discharge the damp air completely before loading machine—the dryness of the material determines the subsequent yield.
Moisture content is the passing line for drying materials.
If the drying material is done directly in the barrel, it will foam no matter how tight the mold is.
Pitfall 1: Skipping the drying of material. Using moist material directly for injection molding results in surface silver streaks and shrinkage occurring together—this drying step cannot be compensated for if skipped.
Pitfall 2: Insufficient clamping force. Flash—check the clamping force.
Pitfall three: Not measuring moisture content. Silver pattern — moisture content must be measured.
Moisture content, temperature, time — ask before starting the machine
Three questions: what system, how thick the parts, what clamping force. One check: measured trial mold yield rate—three questions and one check, supplier details are clear.
Drying material verification must be done first: set the temperature and duration according to the resin, and only start the machine when the moisture content meets the standard. Remove the moisture first, then discuss pressure—the moisture content is the pass line for drying materials.
Make sample retention a habit: retain samples from each batch and recheck the moisture content by batch. Before switching materials between batches, compare them first before scaling up—the batch remains stable, and customer complaints are fewer.
Flying edges, missing glue, silver streaks: a table for fault comparison
| Phenomenon | Reason | Countermeasure |
|---|
| Flying edge | High moisture content | Add roasting material |
| Flying edge | Low clamping force | Locking mold |
| Silver streak | Moist | Add roasting material |
| Shortage of materials | Low pressure | Apply pressure |
| shrink | Low hold pressure | Increase pressure |
Only feed materials when the moisture content meets the standard—if drying is inadequate, silver streaks, bubbles, and hydrolysis will occur together. Adjust the temperature of the drying hopper according to the material grade; seal the dried material to prevent moisture, because if it absorbs moisture, all the drying will be wasted.
Write the drying material into the process card: three-step check of temperature, time, and moisture content. Before changing materials, compare the drying window before discussing the price; ensure the hopper is sealed tightly, and do not leave it open after drying.
Drying and then absorbing moisture is equivalent to not drying at all—the problem lies not in the drying equipment, but in the sealing during transportation. The screw should follow the TPE design compression ratio; the injection molding pressure and clamping force should be balanced, otherwise a high pressure will cause flash to escape.
TPE 'afraid of water'—drying the material is her ritual before molding; if the silver streaks are not thoroughly removed, problems arise. The temperature is adjusted according to the grade; moisture content testing is done according to the standard, and only after the data is verified is the machine started.
After the moisture content is properly controlled, continuous production shows no silver streaks. Drying records are archived; personnel operations are consistent, and for similar issues, first check the ledger.
Most TPE itself does not absorb moisture, but if the granules are oil-filled or hygroscopic and absorb water, injection molding will result in splay, sticking to the mold, and surface blemishes.
The drying temperature of the material depends on the grade, generally 60-80°C for two to four hours; after drying, seal it to prevent moisture. Leaving it open for an afternoon is equivalent to drying in vain, and an insulated hopper ensures stability.
Check the moisture content when accepting dried materials, not how long they have been dried. Start the machine only after accurately measuring the moisture content; keep the hopper insulated, and when changing colors or materials, clean the barrel first; keep a sample from each batch to check the appearance, and only increase the production once silver streaks and bubbles have disappeared.
Final inspection of dried material: moisture content, hopper insulation, and color change cleaning of the cylinder are carried out with each batch.
Restart the machine after accurately measuring the moisture content, keep the hopper insulation pipe in good condition, and clean the barrel first when changing color or material; keep a sample from each batch to check for silver streaks and bubbles, and only increase the output once they disappear.
Ultimately, drying the material is about managing three things at once: moisture content, hopper sealing, and barrel cleaning. Set the temperature according to the grade at 60-80℃ and dry for two to four hours. After drying, seal to prevent moisture; measure the moisture content accurately before starting the machine, and clean the barrel first when changing color or material.
Cologne Customer Case: Shrinkage Rate Unstable and Dimensions Fluctuating, Small Batch Trial Production Continues with Three More Orders
An injection molding factory in Chongqing has unstable shrinkage rates for TPE parts, with large dimensional fluctuations. Cologne coordinated small batch trial production for verification before scaling up, achieving stable dimensions, and the customer placed repeat orders for three consecutive batches. During small batch trial production, lock the dimensions before mass production — for dimensional issues, check the drying of the material first, then the parameters.
Summary
The process of drying and heating TPE materials involves removing moisture first, then controlling pressure. If the injection molding pressure is high, flash cannot be controlled, and the moisture content is at the passing line.
For more than ten years, I've focused on just one thing: making nylon usable.
PA6 and PA66 are the basics, PA46, PA6T, and PA9T are the threshold for high temperature resistance, PA11 and PA12 handle water and oil pipelines, and nylon alloys make up for the balance that a single resin can't provide. Modified thermoplastic elastomers, modified nylon, modified PPO, and PPS run in parallel, along with nylon resins, secondary brand materials, and bulk stock from major chemical companies.
Using the same material in the wrong place means accidents. So you ask about the part first, then the material.
