Mold Manufacturing

Steel is a decisive factor for plastic injection molds quality, and choosing a reasonable steel is the most important thing. The criteria for selecting steel are:
●Requirements for injection molding materials:
Different plastics require different steel, such as requirements for high polish, corrosion resistance, and so on;

●Steel Price:
Steel performance should be sufficient for use, not necessarily the more expensive, the better. Considering the cost factor of the plastic injection molds, the mold steel should be chosen according to the corresponding mold lifespan to avoid unnecessary waste. Generally, P20 has a lifespan of around 300,000 cycles; 1.2738 can handle 500,000 cycles without issues, while H13/1.2344 usually lasts above 800,000 to 1,000,000 cycles. The selection can be made based on the specific situation.

●Heat Treatment:
The surface treatment of the plastic injection molds is also very important.
Nitriding can enhance the surface hardness of the steel, effectively extend the life of the mold;
Plating can be effective modification of the mold steel, some of the need for high brightness and corrosion-resistant plastic parts can use plating to enhance and improve the performance of steel.

Mature plastic injection mold structure not only consider the product material properties, shrinkage, molding temperature, elasticity and tensile deformation coefficient, etc., but also take into account the cooling water circuit, the speed of opening and closing the mold.
Reasonable plastic injection mold structure can effectively extend the mold life and ensure the smooth production of the mold. Improve efficiency and reduce costs.

The arrangement of the plastic injection molds manufacturing process is especially important, reasonable manufacturing process arrangement can speed up the manufacturing cycle, shorten the manufacturing time, effective cost savings.
And more importantly, accurate and reasonable manufacturing process can ensure the stability of the plastic injection molds in the plastic injection molding process and extend the mold life.

It is the lowest bar that determines the capacity of the bucket. This truth is understood by everyone, but it is often unnoticed when doing so. The same goes for plastic injection molds.
Although plastic injection mold standard components are not directly involved in plastic injection molding, But they control the operation of the whole mold.

Good mold standard components should be able to wear-resistant, hard enough, high precision, should not be deformed. Different brands of mold standard components price difference is very large, so do not cut the price so much when you purchase plastic injection molds, cut to cut, your plastic injection molds from Mercedes-Benz straight down to the Volkswagen.

Fit mold depends on the experience of mold fitter, seemingly simple work is the most technical work. Complex molds mainly depends on this work.

Flat mold is the simplest, as long as there are no flash, mistake at the parting line surfaces, Like auto parts mold is more complex, not only the parting line surface is relatively irregular, and often includes more than one sliders, Lifters etc.

At the same time, other problems of the plastic injection mold can be improved and perfected by fiting mold. So it is a comprehensive work.

Polishing is the final stage in plastic injection molds manufacturing. It directly reflects on the plastic parts, making it a critical aspect of the mold manufacturing process.
Polishing also help and complements the mold’s functionality, especially in the demolding process. Often, production issues arise from inadequate polishing, leading to excessive resistance, difficulty in demolding, and even part defects like whitening or cracking.

Plastic injection mold assembly is like assembling a machine; every component, every screw must be error-free, as the consequences can be severe. Minor mistakes can lead to product defects and production issues, while major errors can irreparably damage the mold, rendering it useless. Therefore, assembly work must be meticulous.

During the assembly process, particular attention should be given to mold cleanliness, especially in the water channels and screw holes. It is crucial to blow away any iron debris inside; otherwise, it can upset customers greatly.

Experienced plastic injection mold professionals know that cooling is crucial for plastic injection molds.

Due to the increase in commodity prices and labor wages, in large-scale injection molding production, every second reduction in the injection cycle can bring unimaginable profits. However, speeding up the production cycle can also lead to a rise in mold temperature. If not effectively controlled, it can cause the mold to become too hot and unable to continue working, even leading to mold deformation and scrapping.

Therefore, excellent cooling system design is crucial, including the layout density, diameter, and interconnections of the cooling systems.

Venting System is a structure for exhausting the gas trapped inside the mold during plastic injection molding.

During plastic injection molding, the time for plastic to fill the cavity is extremely short, in order to quickly remove the air inside the cavity and the volatile gases of the plastic, the plastic injection mold must have a good exhaust function. If the exhaust is not good, it will easily cause the product is not full of mold, uneven filling, bubbles, or cause local carbonization of the plastic part burns and other defects.

Mold maintenance mainly involves upkeep during the plastic injection molding process. Similar to cars, molds can be scrapped if they are not used and maintained regularly.

Therefore, comprehensive maintenance is essential after each mold use, especially rust prevention for the forming parts and critical moving components. Since molds come into contact with water during production and may get wet during installation or disassembly, it is crucial to ensure the mold’s dryness before applying rust preventive agent