Injection molding products crack no more trouble, now tell you why

　　Injection molding products are plastic injection molding machines that are plasticized and melted by injection molding, and then injected into the cavity of the molding die. After cooling and cooling, the melt is solidified and then released, and the injection molding machine is injection molded, such as Packing Plastic Tube Core.

　　Plastic injection molding machines have a wide variety of injection molding products, and the application range is also wide, especially in textile equipment and automobile manufacturing, there are many shapes of injection molding products as accessories. Medical equipment, cultural and educational supplies, and various containers, turnover boxes, and shoes that can be seen everywhere in people's daily lives. There are also a variety of complex injection molded structural parts, functional parts and special-purpose precision parts. Injection molding products are widely used in transportation, packaging, post and telecommunications, telecommunications, construction, home appliances, computers, aerospace and defense, and other national economies. The field has become an indispensable means of production and consumer goods.
                                                               
                                                                                                                              Packing Plastic Tube Core

　　As an ABS Plastic Tube Core Supplier, share with you when the injection molded product cracks, including filament cracks, micro-cracks, whitening, cracking, and mold sticking, flow channel sticking, or traumatic crisis. The cracking time is divided into demolding cracking and application of cracking. There are mainly the following reasons:

　　1. Processing:

　　(1) If the processing pressure is too large, the speed is too fast, the more filling, the injection and the holding time are too long, the internal stress will be too large and crack.

　　(2) Adjusting the mold opening speed and pressure to prevent demoulding cracking caused by rapid drawing of the workpiece.

　　(3) Appropriately increase the mold temperature, make the parts easy to demould, and appropriately reduce the material temperature to prevent decomposition.

　　(4) Prevention of cracking due to weld line degradation due to plastic degradation caused by plastic degradation.

　　(5) Appropriate use of the release agent, and attention should be paid to the elimination of substances such as aerosols attached to the mold surface.

　　(6) The residual stress of the workpiece can be reduced by eliminating the internal stress by annealing heat treatment immediately after molding to reduce the generation of cracks.

　　2. Mold aspect:

　　(1) The balance should be balanced. For example, if the number of ejector pins and the cross-sectional area are sufficient, the draft angle should be sufficient, and the cavity surface should be sufficiently smooth to prevent cracking due to external force causing residual stress concentration.

　　(2) The structure of the workpiece should not be too thin, and the transition part should adopt the arc transition as much as possible to avoid stress concentration caused by sharp corners and chamfers.

　　(3) Minimize the use of metal inserts to prevent the internal stress from increasing due to the difference in shrinkage between the insert and the part.

　　(4) Appropriate stripping intake passages shall be provided for deep-bottomed parts to prevent vacuum underpressure.

　　(5) The main channel is large enough to release the gate material in the future when it is cured, so that it is easy to demould.

　　(6) The main channel bushing and the nozzle joint should prevent the chilling material from being dragged to make the workpiece stick to the fixed mold.

　　3. Material aspects:

　　(1) The content of recycled materials is too high, resulting in too low strength of the parts.

　　(2) The humidity is too large, causing some plastics to react with water vapor, reducing the strength and causing cracking.

　　(3) The material itself is not suitable for the environment or quality that is being processed, and the pollution will cause cracking.

　　4. Machine side:

　　The plasticizing capacity of the injection molding machine should be appropriate. If the plasticization is too small, it will not be completely mixed and become brittle. When it is too large, it will degrade.

　　Our company PVC Packing Plastic Tube Core is available for sale. Welcome to consult.