Injection mold maintenance: reduce mold deformation

author: Universe plastic

2024-04-08

During the manufacturing and use of injection molds, mold deformation may occur. Mold deformation will lead to inaccurate dimensions and poor appearance of injection molded products, and even affect the life and stability of the mold.

In order to avoid mold deformation, relevant requirements need to be followed during manufacturing and use. This article will detail how to avoid mold deformation:

How to avoid deformation when making molds:

1. Mold material selection

Material selection is the key to reducing mold deformation. Select materials with good mechanical properties and thermal stability to withstand the high temperatures and pressures during injection molding.

Use homogeneous materials to ensure the consistency of the internal structure of the material and reduce the possibility of deformation. You can consult a professional injection mold manufacturing company for advice.

2. Material heat treatment

Preheat the material before processing to eliminate the internal stress of the material. Carry out appropriate hardening treatment (such as quenching, tempering) to ensure the hardness and toughness of the mold. Cooling should be done slowly after heat treatment to prevent deformation and cracking caused by rapid cooling

3. Optimize mold design

Excellent mold design can reduce deformation, maintain the symmetry of the mold design, and reduce uneven stress caused by asymmetric structures.

In the mold structural design, add reinforcing ribs to increase structural support and avoid excessively thin wall thickness and sharp transition design. To improve the stability and rigidity of the mold.

In the design of the mold cooling system, reasonable arrangement of cooling channels and apertures can improve the cooling effect of the mold, reduce temperature differences, and thereby reduce the occurrence of deformation.

4. Precise processing of equipment

Use reasonable processing techniques and sequences to avoid material stress concentration caused by excessive local processing. For parts with high precision requirements, multiple light cutting processes are used to gradually reduce stress.

5. Eliminate material stress

Eliminate residual stress inside the material through vibration aging treatment. After the processing is completed, stress relief annealing is performed to eliminate the internal stress generated during the processing.

6. Control the processing environment

Processing is carried out in a constant temperature environment to avoid deformation caused by thermal expansion and contraction caused by temperature changes. Control the humidity of the processing environment to prevent material deformation due to hygroscopic expansion or drying shrinkage.

How to avoid deformation when using molds for injection molding:

1. Pay attention to manual assembly

When the mold parts are manufactured, whether it is mold assembly or injection molding machine installation, it must be operated by professional engineers to avoid mold assembly errors and deformation caused by mechanical forces.

2. Set reasonable injection molding parameters

The injection molding machine should set the injection force and parameters from small to large, and operate the mold correctly for injection molding production. Avoid excessive mechanical impact and improper operation during the injection molding process, which may cause mold deformation.

Universe Plastic Injection Molding Machine

3. Maintain uniform cooling

Set the cooling time of the injection molding machine reasonably to avoid mold deformation caused by too fast or too slow cooling.

4. Control mold temperature

The control of mold temperature is very important to reduce deformation. The temperature of the mold will affect the thermal expansion and contraction of the material, thereby affecting the dimensional stability of the mold.

How to avoid deformation when not using a mold:

1. Inspection and maintenance

Regularly check the status of the mold to detect and repair potential deformation problems in a timely manner. Carry out maintenance and upkeep of the mold in accordance with regulations to ensure its long-term stable operation.

Summarize

Through the above reasonable measures and precautions, the possibility of mold deformation can be effectively reduced, ensuring stable product quality and extending the service life of the mold.

Dongguan Universe Plastic Co., Ltd. has more than 15 years of mold manufacturing services and has rich manufacturing experience in reducing mold deformation. If you have problems with mold deformation, please feel free to leave a message for consultation.

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