Principle of mold design(1)

Release time :

2023-03-21

In this issue, I will tell you about the design principle of the mold. Because different forming molds have been used in many fields, and the manufacturing technology of professional molds has also undergone certain changes and developments in these years, so in this part, the general design rules of vacuum forming molds are summarized. The design of vacuum forming molds includes batch size, molding equipment, precision conditions, geometric shape design, dimensional stability and surface quality, etc. 1.The size of the batch is used for experiments, the output of the mold is small, and it can be made of wood or resin. However, if the experimental mold is used to obtain data on shrinkage, dimensional stability, and cycle time of the product, a single-cavity mold should be used for the experiment, and it can be guaranteed to be used under production conditions. Molds are generally made of plaster, copper, aluminum or aluminum-steel alloys, and aluminum-resin is rarely used. 2.Geometric shape design, when designing, it is often necessary to comprehensively consider dimensional stability and surface quality. For example, product design and dimensional stability require the use of female molds (concave molds). However, products with higher gloss on the surface require the use of male molds (convex molds). In this way, the purchaser of plastic parts will take these two points into consideration so that the product can be produced under this condition. Experience has proved that the design that does not meet the actual processing conditions is often a failure. 3.Dimensional stability. During the molding process, the surface of the plastic part in contact with the mold has better dimensional stability than the part leaving the mold. If the material thickness needs to be changed due to the material stiffness in the future, it may lead to the conversion of the male mold to the female mold. The dimensional tolerance of the plastic part cannot be lower than 10% of the shrinkage rate. The first part of the mold design principle has been explained to everyone, and the next issue will continue to explain the design principle of the mold.We welcome more people to pay attention to our company, ZHUHAI BAOLI FOAM SPRAY PUMP CO.,LTD.

In this issue, I will tell you about the design principle of the mold.

Because different forming molds have been used in many fields, and the manufacturing technology of professional molds has also undergone certain changes and developments in these years, so in this part, the general design rules of vacuum forming molds are summarized.

The design of vacuum forming molds includes batch size, molding equipment, precision conditions, geometric shape design, dimensional stability and surface quality, etc.

1.The size of the batch is used for experiments, the output of the mold is small, and it can be made of wood or resin. However, if the experimental mold is used to obtain data on shrinkage, dimensional stability, and cycle time of the product, a single-cavity mold should be used for the experiment, and it can be guaranteed to be used under production conditions. Molds are generally made of plaster, copper, aluminum or aluminum-steel alloys, and aluminum-resin is rarely used.

2.Geometric shape design, when designing, it is often necessary to comprehensively consider dimensional stability and surface quality. For example, product design and dimensional stability require the use of female molds (concave molds). However, products with higher gloss on the surface require the use of male molds (convex molds). In this way, the purchaser of plastic parts will take these two points into consideration so that the product can be produced under this condition. Experience has proved that the design that does not meet the actual processing conditions is often a failure.

3.Dimensional stability. During the molding process, the surface of the plastic part in contact with the mold has better dimensional stability than the part leaving the mold. If the material thickness needs to be changed due to the material stiffness in the future, it may lead to the conversion of the male mold to the female mold. The dimensional tolerance of the plastic part cannot be lower than 10% of the shrinkage rate.

The first part of the mold design principle has been explained to everyone, and the next issue will continue to explain the design principle of the mold.We welcome more people to pay attention to our company, ZHUHAI BAOLI FOAM SPRAY PUMP CO.,LTD.