Bess Tooling

🌈 Analysis of the causes of cracking of injection molded products 🚀🚀 🔥🔥 1. Processing: ✅ Excessive processing pressure, too fast speed, too much filling, too long injection and holding time will cause excessive internal stress and cracking.⚡ ⚡ ✅ Adjust the mold opening speed and pressure to prevent rapid strong pulling of the parts from causing demolding cracking. ✅ Properly increase the mold temperature to make the parts easy to demold, and appropriately lower the material temperature to prevent decomposition. ✅ Prevent cracking due to weld marks and plastic degradation causing low mechanical strength. 🔥🔥 2. Mold: ✅ The ejection should be balanced, such as the number of ejector pins and cross-sectional area should be sufficient, the demolding slope should be sufficient, and the cavity surface should be smooth enough to prevent cracking caused by residual ejection stress concentration due to external force. ✅ The structure of the part should not be too thin, and the transition part should use arc transition as much as possible to avoid stress concentration caused by sharp corners and chamfers. ✅ Use as few metal inserts as possible to prevent the internal stress from increasing due to the different shrinkage rates between the inserts and the parts.⚡ ⚡ ✅ For deep-bottomed parts, appropriate demoulding air inlet channels should be set to prevent the formation of vacuum negative pressure. 🔥🔥 3. Materials: ✅ The recycled material content is too high, resulting in low strength of the parts. ✅ Excessive humidity causes some plastics to react chemically with water vapor, reducing strength and causing ejection cracking.⚡ #injection #mold #injectionmolding #molding #ejection #material #process #mould #tooling #plastic #plastic #demoulding #demoulding #cavity #surface

⚡⚡Why do injection molded parts have shrinkage marks? ⚡⚡ The main reasons for shrinkage marks include: ❎ ❌ 1. Uneven wall thickness of injection molded parts: When some parts of the plastic part are thicker than other parts, these thicker parts will shrink more during the cooling process, resulting in surface depression. ❎ ❌ 2. Uneven cooling: If the cooling system of the mold is not designed properly, some areas will cool too quickly while other areas will cool slowly, which will also cause shrinkage marks. ❎ ❌ 3. Insufficient injection and holding time: If the injection and holding time are not enough, the melt is not fully filled and compacted in the mold, which will also cause shrinkage marks. ❎ ❌ 4. Mold design problems: unreasonable gate position, too small runner size or insufficient mold venting will affect the filling and holding process of the melt, resulting in shrinkage marks. ⏪ 🔥 The solutions to shrinkage marks include: 🔥 ✅ 1. Adjust process parameters: appropriately increase the injection pressure and increase the compression density of the melt, and extend the injection and holding time to compensate for the shrinkage of the melt. ✅ 2. Optimize mold design: ensure that the cooling system of the mold is evenly distributed, the gate position should be set at a symmetrical position, and the runner and gate size should be appropriately increased to ensure that the melt can smoothly fill the mold. ✅ 3. Control materials: use resins with low shrinkage, ensure that the material is dry, and avoid gases generated by high hygroscopicity that hinder the flow of the melt. ✅ 4. Adjust wall thickness: try to make the wall thickness of the plastic part uniform. If the wall thickness difference is large, it can be solved by adjusting the structural parameters of the pouring system or changing the wall thickness distribution of the plastic part. #injection #mold #injectionmolding #shrinkage #shrinkage #shrinkage #cooling #system #molddesign #mould #design #tooling #material #material #engineering

⚡⚡How to control the size of injection molded products? ⚡ 🔥 Control of mold design🔥 ✅⏩1. First of all, we must fully understand the technical requirements of users in many aspects, such as mold structure, material, hardness, precision, etc., including whether the shrinkage rate of the molded plastic material is correct, whether the 3D size of the product is complete, and reasonably process and analyze. ✅⏩2. Fully consider all places that affect the appearance of the injection molded product, such as shrinkage holes, flow marks, draft angles, weld lines and cracks. ✅⏩3. Under the premise of not hindering the function and pattern shaping of the injection molded product, simplify the mold processing method as much as possible. ✅⏩4. Whether the selection of the parting surface is appropriate, the mold processing, the molding appearance and the deburring of the molded parts must be carefully selected. ✅⏩5. Whether the ejection method is appropriate, whether to use push rods, unloading plates, ejection sleeves or other methods, and whether the positions of push rods and unloading plates are appropriate. ✅⏩6. Whether the side core pulling mechanism is suitable, the action is flexible and reliable, and there should be no jamming phenomenon. ✅⏩7. Which method of temperature control is more suitable for plastic products, which structure circulation system is used for temperature control oil, temperature control water, coolant, etc., and whether the size, quantity, and position of the coolant hole are appropriate. ✅⏩8. Whether the gate form, the size of the material channel and the feed port, the gate position and size are appropriate. ✅⏩9. Whether the influence of heat treatment deformation of various modules and mold cores and the selection of standard parts are appropriate. ✅⏩10. Whether the injection volume, injection pressure and clamping force of the injection molding machine are sufficient, and whether the nozzle R, gate sleeve aperture, etc. are matched appropriately. #injection #molding #Injectionmolding #mold #design #molddesign #mould #tooling #gate #gate #product #process #hardness #hardness #material #shrinkage

💥Our expertise 💥 💚MOLDFLOW 💚 Moldflow provides simulation tools for injection mold design, plastic part design, and injection molding process validation and optimization. 🧡🚀 Through generational molding simulation, our team can optimize gate location, part appearance, material selection and vent design to achieve the best part quality with the fastest cycle time. 🕙⏳ 💚COMPUTATIONAL FLUID DYNAMICS💚 Shortening the cooling time can significantly affect yield. CFD analysis enables our engineers to simulate multiple cooling design solutions and evaluate each solution independently and against each other. This process can occur in parallel with other engineering activities to streamline the design process while ensuring the most innovative solutions. 💛💛CFD analysis can improve cooling, increase yields, reduce prototyping costs and speed up production times. 🕝 #Moldflow #Moldflow #tool #tooling #injection #mold #design #injectionmold #molddesign #engineering #molding #plastic #process #analysis #mould #production #CFD #quality #quality

At Bess, our expertise in products is informed by our extensive experience in manufacturing technologies such as injection and blow molding. 👈 ✨✨ ⚡🔥 We expertly balance the complexity of tool architecture and incorporate it into design manufacturing, managing complex projects involving numerous components and large assemblies to ensure a functional, aesthetically pleasing and manufacturable solution. 🚀🚀 #injection #injectionmolding #injection #blowmolding #molding #tooling #mold #mould #tool #product #manufacturing #toolingdesign #molddesign #engineering

We will have to establish a clear quality inspection criteria at the initial stage of the project. Then, we will inspect all details of the off-tooling sample to review and confirm all quality inspection criteria. Afterward, we will inspect products by using AQL standards. ⚡ 📝 During master production, we will check and measure the products evey hour to ensure which is same as the original approved sample, to ensure the whole batch products are with same standard. 🔔✅✅ 💡 At Bess we assign on engineer as product leader to control every project our product leaders communicate regularly with our clients to give them regular written reports progressing and we and guarantee customer satisfaction on receipt of a finished part our professional technical involvement gives added value to a poject. our raw materials, testing, inspection and production processes adhere to strict quality control guidelines necessary for regulatory approvals. 📂 🖋 #quality #inspection #AQL #standard #engineering #production #mold #mould #tooling #progressing #processes #product #molddesign #toolingdesign #Injection #molding #Injectionmolding #technical

We summarized the problems of air marks and bubbles in injection molded parts. 👈 👈 We welcome more questions and solutions in the comment area. Thanks! 😋 ❌ Problem 1: The gate size is too small❌ ✅ Solution: The thickness of the gate on the side of the large nozzle should not be too thin, generally not less than 1/2 of the main wall thickness. The latent ribs should be placed into the gate. The ribs should be appropriately widened. The gate can be made into an oval shape to improve air trapping on the surface of the gate. ❌ Problem 2: The location design of the pouring point is unreasonable❌ ✅ Solution: The location of the glue inlet point should be fully considered so that the gas can be smoothly discharged from the cavity and the filling pressure of the cavity should be minimum. ❌ Problem 3: Mold trapped air❌ ✅ Solution: Ventilation needs to be strengthened on the parting surface of the product weekly drawing and the end of the melt. Deep ribs and deep columns exceeding 6-8mm require exhaust inserts. ❌ Problem 4: Unreasonable flow channel design❌ ✅ Solution: Transparent components such as PC and PMMA must make "S" shaped flow channels to prevent cold materials from entering the mold cavity and causing flow marks. ❌ Problem 5: The flow channel diameter is too small❌ ✅ Solution: For medium and large PC and PC+ABS parts, the diameter of the flow channel can be appropriately increased to facilitate glue removal. ❌ Problem 6: The flow channel texture is too thick ❌ ✅ Solution: Generally, use 320# or above sandpaper on the surface of the runner to save light, but the runner of mirror products must use 600# sandpaper to save light. Conducive to melt filling. #texture #plastic #engineering #manufacturing #design #product #manufacturing #gate #manufacturing #processes #Injection #molding #plasticinjectionmoulding #productdesign #tooling #design #mold #mould #air #bubble #material #runner #insert #surface #solutions

Silicone secondary injection molding process 🌈 #Injection #molding #process #mold #mould #tooling #polyethylene #silicone #thickness #material #inject #Molddesign #plastic #polishing #engineering #secondary

Liquid Silicone Rubber Mold 👈 👈 Liquid silicone rubber products are suitable for small injection molded parts, such as connector bushings, spark plug sleeves, O-rings, gaskets, diaphragms, nipples, etc. In addition, it is also suitable for co-extrusion and co-molding with a variety of materials. Manufacturing, producing extruded parts with core materials, such as wires and cables or knitted coatings, etc. 🛩 ✈ ⚡ ⚡ The hardness and tear strength of molded parts and extruded coatings made of liquid silicone rubber products are close to those of molded parts and extruded coatings made of ordinary silicone rubber products, and they have better compression set. and flame retardancy. The final product has all the excellent properties of silicone rubber products, namely voltage resistance, high temperature resistance, low temperature flexibility, chemical inertness, moisture resistance, weather resistance and radiation resistance. 🔔 🌈 #rubber #mold #mould #hardness #silicone #liquidsilicone #Liquidsiliconerubber #tooling #compression #material #molding #engineering #engineering #silicone

 💚 Spring plus nylon buckle fixed mold ejection 💚 If the tightness of the small mold product is not strong, you can directly use the spring to push it out. If there is a sloping top, it is recommended to use a spring and a nylon buckle. The product is left in the movable mold, and the sloping top is in the fixed mold. If the sloping top is If the ejection is not synchronized, the product may be easily damaged. 💥 🚀 If there is ejection, there must be reset. The principle is the same as that of movable mold ejection. Design the reset pin. In addition, it should be noted that if the ejection pin has a lot of inclined ejection, it is necessary to design a middle support to guide the ejection. 🌈 Disadvantages: Nylon buckles are easy to wear and need to be checked and replaced regularly. 🔥 ⚡ #fixed #plastic #engineering #manufacturing #design #product #manufacturing #tightness #manufacturing #processes #drawings #Injection #molding #plasticinjectionmoulding #productdesign #tooling #design #mold #mould #Overmolded #Spring #ejection #nylon