Thursday, 21 March 2013

Find the Basic Information about Plastic Injection Molding

If you are not aware of the term “plastic injection molding”, then let us understand this term before we move ahead with this.

Custom or plastic injection molding involves manufacturing of different plastic parts in accordance with certain tasks or applications. The components or parts can also be customized according to specifications of customers.

According to the process involved with plastic injection molding, the plastic pellets are disintegrated thereafter the process of injecting to a mold cavity takes place. It is typically processed under extreme pressure. After the injection process is done, the molded part is discharged thus the repetitive process continues till the part is finished to become a product as a component. Apparently, the injection molding is a process of delicacy and therefore it is executed by injection molding machine and die/mold.

The molding machine is usually equipped with clamping unit so that the mold can be opened and closed mechanically. Another part, known as injection unit, has closed mold where the heated materials are plunged into. This means, once the materials are heated, they are plunged to closed mold. Given that injection molding machine consumes high power energy to provide colossal thrust; these machines are apparently operated on electric or hydraulic power. Also, considering that the machine requires high pressure to operate well, the tooling part of the machine is usually designed with aluminum or steel that can withhold extreme pressure impact.

You can also say that the great quality of tooling machine is very conducive to quality plastic injection molding. Custom plastic molds are effective ways of manufacturing different plastic parts.

The plastic injection molding has three distinctive components such as the injection equipments by which the melted plastic are transmitted, molds which are customized, and the third component is clamping which is used to regulate the pressure. The plastic pellets are melted by injection unit and then injection process is carried out by a ram injector or reciprocating screw, which is a part of injecting tiny bits of resin (stuffed in the mold shots) into the shots. Once the injection process is over, the mold cooled continuously till the injected resin is solidified.

Though the injection molding is conducive to handling molding process effectively, it has few “avoidable” complications. For example, if the temperature is increased against the required limit, the tooling parts can be scorched. Usually the time extension depends on the time consuming cycle (usually, the cycle is time consuming). The resin is thus overheated followed by the extended cycle time. Also, the resin gasifies itself under intolerable temperature during melting process.

Plastic injection molding is a process of manufacturing plastic parts for specific applications. The process involves disintegrating plastic granules and injecting them to mold to form a component. There are three components involved with plastic injection molding process.


  1. Sino Mould has made various plastic injection moulds and injection molds for automotive parts, home appliance, packaging, Logistic and for daily use plastic products as well as molding.

  2. I read your post and I really appreciate your Information. I will get good knowledge from there as well. Sino Moldings Company has an Expert Manufacturer & Supplier Team for Home Appliance Moldings including Refrigerator Plastic Parts, Washing Machines, Microwaves, Air Conditioner, Rice Cookers, Fans, Water heaters and Cooler Pastic Moldings.

  3. Your blog is so cool or this blog post very interesting and informative also. DAKUMAR is one of the leading Injection Molding Machine Supplier, focus on Chinese molding machines & equipments with supplying qualified molding machines in China, PET machine & servo injection machine etc.