机器人外壳摸着硬邦邦，一碰就磕人。外壳要软内核要稳，软硬得先分开。
一碰就磕人，不是造型硬是没做软
人形机器人外壳包胶是“软硬件”：软壳、硬核、包胶。材料要软硬结合——结论先给：外壳要软，内核要稳——软硬，是包胶的分工。
机器人外壳包胶最大的坑：软硬部位分不清，包胶粘上去也脱——软硬，是包胶的头一关。
机器人件是体验件：手感、耐用都是问题。材料选对，体验才稳——机器人件，别省配方。
软壳硬核，TPE包胶为什么合适
机器人外壳包胶用 TPE 的理由：软壳可做、硬核可做、包胶可做——三条合起来，适合机器人。
软壳是体验：手感柔软有弹性。手感测试写进验收——偏硬，就是问题。
硬核是支撑：内核稳定不晃。硬度测试写进验收——偏软，就是问题。
手感、包胶、耐用，三关各看什么
手感工况：触感柔软。手感数据要验——偏硬，就是问题。
包胶工况：软硬结合。剥离数据要验——脱层，就是问题。
耐用工况：反复使用。耐磨数据要验——磨花，就是问题。
机器人包胶材料，一张表对照清楚
| 部位 | 材料 | 硬度 |
|---|
| 外壳 | TPE | 软 |
| 内核 | PC/ABS | 硬 |
| 关节 | TPU | 中 |
| 足底 | TPE | 中软 |
表格读法：部位分材料，硬度跟着走，接触区和支撑区分开设。
按部位选，软硬才对。
摸着软抗用久，验收测这四项
| 项目 | 要求 | 判断 |
|---|
| 手感 | 盲测 | 达标 |
| 剥离 | 测试 | 达标 |
| 耐磨 | 测试 | 达标 |
| 批次 | 锁定 | 达标 |
表格读法：包胶一项项核，体验看得见，剥离力单独验收。
软硬，是包胶的分工。
软硬不分一股料，磕碰脱层一起来
坑一：软硬不分。该软的地方硬、该硬的地方软，手感立刻露馅——软硬先分。
坑二：剥离漏测。脱层——剥离必测。
坑三：手感不验。偏硬偏软——盲测必做。
硬度、剥离、耐刮——做壳前问清
三问：什么部位、什么硬度、什么剥离力。一验：实际使用实测——三问一验，供应商底细清楚。
软硬验证要先行：先把接触区Shore A和支撑区Shore D定死，再谈包胶工艺——软硬，是包胶的头一关。
留样要成习惯：每批留样，手感剥离按批次复测。批次换料先对比再放量——批次稳，客诉少。
脱层、发粘、磨损：故障对照一张表
| 现象 | 原因 | 对策 |
|---|
| 脱层 | 基材不净 | 清洁基材 |
| 偏硬 | 硬度高 | 调配方 |
| 磨花 | 耐磨差 | 换耐磨料 |
| 开裂 | 应力集中 | 改设计 |
| 批次漂 | 配方波动 | 锁窗口 |
外壳包胶太软，机器人一撞就留印；太硬又像塑料——软壳硬核要配平。 软硬失衡，体验和保护两头不讨好。
包胶脱胶先别怪胶水，基材极性不匹配，胶再多也粘不牢。 硬壳配TPE，剥离力按体系选型，别光靠胶水硬凑。
外壳主流Shore A 60-75，约等于牙刷柄手感，太软没支撑、太硬磨手。 软硬按部位分，外壳软、内核硬，别一个料做整件。
包胶是“软皮包硬骨”，剥离力就是皮和骨的黏合力。 剥离力验收卡到1.0-2.0kN/m，低于0.5别量产，用两周就开胶。
剥离力提到1.8kN/m、弯折5000次零脱胶，外壳包胶手感盲测4.8分。 先测剥离再盲测手感，两步都过才放行。
机器人外壳包胶剥离力按1.0-2.0kN/m验收，低于0.5别量产。硬壳ABS或PC配TPE软胶，基材极性不匹配剥离力再测也上不去，相容剂和前处理要写进工艺卡。
机器人外壳软硬按部位分，别一个料做整件。手掌和防撞区用Shore A 60-70软触，关节和骨架用Shore D 40-55硬弹，同件多料多腔要调熔指匹配。
剥离力验收卡到1.0-2.0kN/m，低于0.5别量产用两周就开胶。硬壳配TPE剥离力按体系选型，别光靠胶水硬凑，软硬按部位分别一个料做整件。
软硬失衡体验和保护两头不讨好。硬壳配TPE剥离力按体系选型别光靠胶水硬凑，软硬按部位分外壳软内核硬别一个料做整件。
机器人外壳包胶剥离力卡到1.0-2.0kN/m低于0.5别量产。硬壳ABS或PC配TPE软胶基材极性不匹配剥离力再测也上不去，相容剂和前处理写进工艺卡。
软硬按部位分别一个料做整件外壳软内核硬。剥离力按1.0-2.0kN/m验收低于0.5别量产，硬壳配TPE别光靠胶水硬凑相容剂和前处理写进工艺卡。
科隆客户案例：交期紧性能对不上，留样数据补认证
泉州一家机器人零部件厂，交期紧，现货牌号性能对不上。科隆配合提供同批次留样与物性数据，性能对齐，通过第三方检测并补齐认证。留样加数据，交期问题一次说清——性能对不上，先看留样数据。
小结
机器人外壳包胶的选型，软硬先分，剥离再测，外壳要软内核要稳，软硬是分工。
The robot's shell feels hard and rigid, and it bumps into people whenever touched. The shell needs to be soft while the core stable; softness and hardness must first be separated.
It hits people as soon as it's touched; either the design is rigid or it hasn't been softened.
The humanoid robot's shell coating is 'software and hardware': soft shell, hard core, coating. The material needs a combination of softness and hardness — here’s the conclusion first: the shell should be soft, the core should be stable — softness and hardness are the division of labor in coating.
The biggest pitfall in robot casing overmolding: not being able to distinguish between soft and hard parts, and even if the overmolding sticks, it comes off — soft and hard are the first hurdle in overmolding.
Robot parts are experience parts: touch and durability are issues. Only by choosing the right materials can the experience be stable—don’t skimp on the formula for robot parts.
Soft exterior, hard core: Why TPE overmolding is suitable
Reasons for using TPE for robot outer shell coating: can make soft shells, can make hard cores, can do coating—combining all three, it is suitable for robots.
The soft shell is an experience: it feels soft and elastic. The tactile test is written into the acceptance—if it's hard, it's a problem.
Hardcore is support: the core is stable and doesn’t wobble. Hardness tests are written into acceptance—if it’s too soft, it’s a problem.
Touch, coating, durability—what should be looked at in each of the three aspects?
Tactile condition: soft to the touch. The tactile data needs to be checked—if it's on the hard side, that's a problem.
Rubber coating working condition: a combination of soft and hard. Peeling data must be checked—delamination is the problem.
Durable working condition: repeated use. Wear resistance data must be tested—scratches are a problem.
Robot coating materials, a table makes it clearly comparable
| Body part | Material | Hardness |
|---|
| Shell | TPE | soft |
| Kernel | PC/ABS | hard |
| joint | TPU | middle |
| Sole of the foot | TPE | ChinaSoft |
Table reading method: divide by material for each part, follow the hardness accordingly, and set the contact area and support area separately.
Choose according to the part, the softness or hardness is right.
Touch to check softness and resilience over time, test these four items during inspection
| Project | Requirement | Judgment |
|---|
| hand feel | Blind test | Meet the standard |
| Peel off | Test | Meet the standard |
| Wear-resistant | Test | Meet the standard |
| Batch | Lock | Meet the standard |
Table reading: Each item of encapsulation is checked, the experience is visible, and the peel strength is tested separately.
Soft and hard refer to the division of labor in rubber coating.
No distinction between soft and hard, all the same material; chipping and delamination happen together
Pitfall 1: Confusing soft and hard. Areas that should be soft are hard, and areas that should be hard are soft. The hand immediately reveals the flaw — distinguish between soft and hard first.
Pitfall 2: Missed detection of delamination. Delamination — peeling must be tested.
Pitfall 3: Ignoring the feel. Too hard or too soft—blind testing is a must.
Hardness, peeling, scratch resistance—ask before making the case
Three questions: which part, what hardness, what peel strength. One test: actual usage measurement — three questions and one test, the supplier's details are clear.
Soft and hard verification must come first: first fix the Shore A of the contact area and the Shore D of the support area, then discuss the overmolding process — softness and hardness are the first hurdle in overmolding.
Making sample retention a habit: retain samples for each batch and re-test the feel and peel by batch. When changing materials for a batch, compare first before scaling up—the more stable the batch, the fewer the customer complaints.
Delamination, Stickiness, Wear: A Fault Comparison Table
| Phenomenon | Reason | Countermeasure |
|---|
| Delamination | The base material is not clean | Clean the substrate |
| Somewhat hard | High hardness | Formulate a prescription |
| frosted | Poor wear resistance | Replace wear-resistant material |
| Cracking | Stress concentration | Redesign |
| Batch bleaching | Formula fluctuation | Lock window |
The outer shell coating is too soft, and the robot leaves marks after a bump; if it's too hard, it feels like plastic—the soft shell and hard core need to be balanced. If the softness and hardness are unbalanced, neither the experience nor the protection is satisfactory.
Don't blame the glue first when the coating peels off; if the substrates' polarity doesn't match, no matter how much glue you use, it won't stick well. For hard shells with TPE, the peel strength should be chosen according to the system, don't just rely on glue to make it work.
The mainstream shell Shore A is 60-75, roughly equivalent to the feel of a toothbrush handle; too soft provides no support, too hard feels rough on the hands. The softness and hardness are divided by parts: soft shell, hard core, not made entirely from one material.
Encapsulation is 'soft skin covering hard bones,' and peel strength is the adhesive force between the skin and the bone. The peel strength acceptance card is set at 1.0-2.0 kN/m; if it is below 0.5, do not mass-produce, as it will start delaminating after two weeks.
The peel strength reached 1.8 kN/m, and after 5000 bending cycles there was no delamination. The touch feel of the coated housing scored 4.8 in a blind test. Peel strength is tested first, then the touch feel is tested blindly; both steps must pass before release.
The peel strength of the robot casing overmold should be accepted at 1.0-2.0 kN/m; if it is below 0.5, do not mass-produce. Hard-shell ABS or PC paired with TPE soft rubber will not achieve sufficient peel strength if the polarity of the substrate is mismatched, even if retested. Compatibilizers and pretreatment must be included in the process card.
The hardness of the robot's outer shell is divided according to different parts, rather than making the entire piece from a single material. The palm and collision protection areas use Shore A 60-70 for a soft touch, while the joints and skeleton use Shore D 40-55 for hard elasticity. For parts with multiple materials and cavities, the melt flow index needs to be matched.
Peel strength acceptance card is 1.0-2.0 kN/m; if it's below 0.5, mass production will start peeling within two weeks. For hard shells with TPE, select the peel strength according to the system; don't just rely on glue to force it. Use separate materials for hard and soft parts to make the whole piece.
Experiencing an imbalance between soft and hard ends up being unappealing to both protection and feel. When pairing a hard shell with TPE, select the delamination force according to the system instead of just forcing it with glue. Separate soft and hard parts according to their positions: a soft outer shell and a hard core, rather than making the whole piece from one material.
The adhesion force of the robot shell overmold is stuck at 1.0-2.0 kN/m, and production should not proceed if it is below 0.5. Hard ABS or PC shells paired with TPE soft rubber substrates have mismatched polarity, and the adhesion force will not increase even after retesting. Compatibilizers and pretreatment should be documented in the process sheet.
Divide the soft and hard parts by area and use one material to make the entire outer shell with a soft interior core and a hard exterior. Accept the peel strength at 1.0-2.0 kN/m, and do not mass-produce if it is below 0.5. For a hard shell with TPE, do not rely solely on glue; record the compatibilizer and pretreatment in the process sheet.
Cologne Customer Case: Tight delivery schedule and mismatched performance, sample data used to supplement certification
A robot parts factory in Quanzhou has tight delivery schedules, and the performance of the available grades does not match. Cologne cooperates by providing samples and physical property data from the same batch, aligning performance, having third-party testing done, and completing the certifications. Samples plus data make the delivery issue clear at once—if the performance does not match, first check the sample data.
Summary
Selection of robot shell coating: first distinguish between soft and hard, then test peel strength. The shell should be soft while the core must be stable; softness and hardness are a matter of division of labor.
