What is the difference between precision molds and ordinary molds?

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Time of issue:2020-12-22
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(Summary description)What are the differences between precision molds and ordinary molds?

Now we first understand the six characteristics of precision mold forming:

1. The dimensional accuracy of the product is high, and the tolerance is small, that is, there is a high-precision dimensional boundary;

Second, the repeatability of the product is required to be high, and the dimensional stability of the day, month, and year is required;

3. The material of the mold is good, the rigidity is sufficient, the dimensional accuracy of the cavity, the smoothness and the positioning accuracy between the templates are high;

Fourth, use precision injection molding machines to replace conventional injection molding machines;

5. Adopt precision molding technology;

6. Choose materials suitable for precision molding.

Secondly, the drawings must be comprehensive, complete and accurate, use inserts as much as possible, consider processing, and rely on the machine to ensure the dimensions as much as possible. Strict design tolerances, not only the working part of the cavity and core, but also the relevant dimensions of the installation position of all inserts must be strictly limited. Generally controlled at +/-0.005

What is the difference between precision molds and ordinary molds?

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What is the difference between precision molds and ordinary molds?

Categories:Company News
Author:
Origin:
Time of issue:2020-12-22
Views:0

Information

What are the differences between precision molds and ordinary molds?

Now we first understand the six characteristics of precision mold forming:

1. The dimensional accuracy of the product is high, and the tolerance is small, that is, there is a high-precision dimensional boundary;

Second, the repeatability of the product is required to be high, and the dimensional stability of the day, month, and year is required;

3. The material of the mold is good, the rigidity is sufficient, the dimensional accuracy of the cavity, the smoothness and the positioning accuracy between the templates are high;

Fourth, use precision injection molding machines to replace conventional injection molding machines;

5. Adopt precision molding technology;

6. Choose materials suitable for precision molding.

Secondly, the drawings must be comprehensive, complete and accurate, use inserts as much as possible, consider processing, and rely on the machine to ensure the dimensions as much as possible. Strict design tolerances, not only the working part of the cavity and core, but also the relevant dimensions of the installation position of all inserts must be strictly limited. Generally controlled at +/-0.005

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Mould 1

Silicone molds are one of the simplest methods in rapid molds. Generally, the prototype is re-molded with silicone. Generally, about 10-30 pieces can be copied! Silicone molds have good flexibility and replication performance, so you don’t need to consider the draft angle. It does not affect the dimensional accuracy, and has good partitionability. It can be directly poured as a whole without dividing the upper and lower molds. Then cut along the predetermined parting line and take out the master mold! Regarding the production of silicone molds, the mold is opened The choice of form and mold line are very important. First, it is convenient to take the mold. Second, the mold line should be selected so as not to affect the overall effect of the product. Third, it does not affect the product quality. For example, the mold line position of the waterscape series products is too high. When the mold sealing line requires a lot of materials, the product cracks are prone to occur; the fourth is to reduce the process operation procedures, such as opening half of the mold.

Mold 2

In order to prevent silica gel from flowing around, the molds are fixed in a regular range with wood or wooden boards, and the first part of the mold is separated by wood and sludge when opening the die. There is no gap between the sludge and the mold, and the surface of the sludge is smooth and flat. After the above work is prepared, then apply petroleum jelly or spray release agent on the plaster mold or the mold. For smooth products, use a clean cotton cloth dipped in petroleum jelly and apply it evenly on the mold. Keep it for 30 minutes to make the mold. The product fully absorbs the petroleum jelly, and then wipes the surface of the mold with a clean cotton cloth, and the surface is required to be bright; and the textured product only needs to be evenly coated with the petroleum jelly to adjust the silica gel according to the formula. When mixing the silica gel, stir in irregular directions to make the curing agent and silica gel fully mix to minimize air mixing into the rubber. For smooth products, it is best to vacuum once when the first layer of rubber is applied, and keep the vacuum at -0.1Mpa. 7-8 seconds.

Mold 3

Mold manufacturing refers to the manufacturing of molds for metal casting, molds for mineral materials, molds for rubber or plastics, and molds for other purposes. The mold industry is commonly known as the "mother of industry". From focusing on single workshop production to nowadays with many brands, the quality and quantity of molds in my country have made a very big leap. In recent years, with the rapid development of my country’s national economy and the increase in people’s income, the consumer market’s demand for consumer goods such as automobiles, communications, electronics, and home appliances has increased rapidly, making these industries enter a stage of rapid development, which has also become the rapid development of my country’s mold industry. An important driving force for development. According to statistics, the total output value of my country's mold industry from 2010 to 2019 is on the rise. In 2019, the total output value of my country's mold industry is about 290 billion yuan, an increase of 4.92% year-on-year. It is expected that by 2020, the total output value of my country's mold industry can reach 3043 100 million yuan.

Mold 4

Technology Highlights (1) The hardness of the laser hardened layer reaches HV800～1100, and it has excellent wear resistance and tensile resistance. The service life after one-time mold repair is 5-50 times longer than that of flame quenching. (2) The laser quenching layer has uniform hardness and layer depth, and has a strong bonding force with the substrate. (3) The amount of deformation after laser quenching is extremely small, and there is no need for any correction and processing. (4) Laser fusion welding technology can repair damaged parts such as local strain on the surface of the mold, and the repair effect is significantly better than other welding methods. (5) It has a high processing speed, usually up to 0.5m2/h. (6) It is only necessary to carry out targeted treatment on the worn parts of the mold, and it is not necessary to treat all the surface of the mold. (7) Significantly improve the surface quality of the drawn parts.