Author: MULAN -Plastic Molding Manufacturer
Injection mold processing is a general manufacturing method. There are three main steps to complete the process: product design, mold design, and production process. These three links constitute the three major links of injection mold processing. So what are the basic steps of injection mold processing technology? The following editor of Xingye Plastic Mold Factory will introduce it to you. An important part of injection mold processing is product design.
Proper design is about achieving desirable goals, but this requires great creativity. In general, product design is generally designed using computer-aided design software, and some specific methods are adopted to avoid cost error uniformity in the product design process, and in the case of incorrect thickness, gradually change from one thickness to another A thickness transition. It is also important to avoid building stress, such as below 90 degrees.
The company's team of technical design engineers will have the ability to brainstorm, design and improve various solutions to suit the complexity of a specific project and lay a solid foundation for the successful completion of the injection molding process. For large-scale injection mold processing, mold design cannot be ignored. Like overall product design, mold design is another opportunity to avoid defects in the injection molding production process.
Poor design can result in a lot of wasted time and money. After the product is correctly designed, verified and molded, the actual production can start, which is the basis of injection molding processing. It can also be said that the thermosetting thermoplastic material is granulated and enters the heater through the hopper, and then heated to a predetermined temperature by the large screw, and then passes through the door and the mold by the large screw.
When the particles reach the mold and the proper pressure is applied, the particles will remain in place during the specified cooling time. After reaching a certain time, the mold is opened to form a product. Repeating this cycle can be used to produce a batch of injection molded parts.
In short, the processing of injection molded products needs to be guided by a good solution to create a functional and beautiful production mode. In the design process, through effective communication and transparency, high-quality injection parts can be obtained. Why does the injection mold have a peculiar smell? 1. The injection molding process uses relatively pure resin.
For a large number of plastics, especially PVC, styrene, polyvinyl acetate, acrylate and other plastics, there is a small amount of residual monomers, which will cause odor. Just get rid of those odors with the hard to control monomer residual resin. If you use this odorless resin, the effect will be very poor.
2. Inject changing additives. The tertiary amine catalysts used to make polyurethane foam usually produce very weak odors and, among other things, fog up the interior windows. The solution to this problem is to find alternatives to this amine.
One of these methods is the use of polyols. The residual hydroxyl compounds are not only part of the polyurethane molecular chain, so they also have catalytic activity. Some polyols can also replace half of the tertiary amine catalyst, so the product emits less odor than this.
Stabilizers used for PVC extrusion or calendering are generally replaced by zinc stabilizers with strong fragrance. As a heat stabilizer, tin octoate is also very common in PVC for automobiles due to its strong odor and small atomization. For products, vegetable-derived oils such as erucic and oleic acids (used in polyolefin and styrene food packaging) are much more odorous than amine lubricants.
3. Injection of adsorbent. Adding a small amount of molecular sieve (an aluminosilicate adsorbent) to the polymer can eliminate the odor of the material. Zeolite contains a large number of gaseous particles, which can absorb small molecules of odor.
The invention has been successfully used in polyolefin extruded pipes, injection molding, blow molding containers, packaging materials, extrusion packaging materials, sealing and the like. Molecular adsorption powder can be added to the plastic as a hygroscopic agent. In addition to removing steam, water vapor can also cause plastic smells.
For more information about injection molds, please visit the official website of Xingye: http://www.dgxingyesj.com/.