Because different molds have been applied in many areas, coupled with the professional mold manufacturing technology in these years have also been a certain change in development, so in this part, summed up the vacuum design of the general design of the mold.
Vacuum Blister Mold design includes batch size, molding equipment, precision conditions, geometric design, dimensional stability and surface quality and so on.
1, the size of the experimental use, mold production hours, 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 article, it is necessary to use a single cavity mold to experiment and to ensure that it can be used in production conditions. Molds are generally made of gypsum, copper, aluminum or aluminum-steel alloys, and are rarely used with aluminum-resin.
2, geometric design, design, often to consider the dimensional stability and surface quality. For example, product design and dimensional stability require the use of female mold (die), but the surface requirements of high gloss products are required to use the male model (punch), so that the plastic parts will be taken into account the two parties So that the product can be produced under optimum conditions. Experience has proved that designs that do not meet the actual processing conditions are often failing.
3, dimensional stability, in the molding process, the plastic parts and mold contact with the surface than the part of the mold to maintain the stability of the better. If you want to change the thickness of the material due to the need for material stiffness in the future, it may lead to the conversion of the male mold to the female mold. The dimensional tolerances of the plastic parts shall not be less than 10% of the shrinkage.
4, plastic surface, the molding material can be wrapped in the scope of the plastic parts can be seen in the surface structure should be in contact with the mold forming. If possible, do not clean the plastic parts with the mold surface. Like the use of female mold manufacturing tub and laundry basin situation.