The plastic mold design and manufacturer tells you that the maintenance and protection of injection molding molds are more important. The more repairs, the shorter the mold life. Conversely, the better the maintenance, the longer the mold life. Injection molding molds are like human bodies. If they are not regularly or unreasonably maintained, various problems will appear during production, leading to no guarantee of product quality, except for the maintenance of injection molding molds, We also need to learn more about the maintenance of injection molding abrasives;

Generally, the protection of injection molds is divided into three categories:

1. Protection of injection mold when not in production

2. Protection during production of injection molds

3. Protection of injection mold after production.

Plastic mold design and manufacturing

The following plastic mold design and manufacturing manufacturers mainly introduce how to maintain injection molds after production. Due to the fact that in some injection mold factories, many masters believe that the molds will be good after injection molding. After the injection mold is produced, it is important to remember to spray a layer of anti rust oil on the inner cavity of the mold, which looks like a small action. If it is ignored, the mold will rust and corrode due to the long storage time during the next production, The protection of injection molds is also one of the important factors that directly affect the life of the molds. As long as the injection molds are well maintained, the service life of the molds will be longer.

Analysis of the causes of warpage and deformation during injection molding by plastic mold design and manufacturer

Analysis of the causes of warpage of injection molded products:

1) Mold aspect:

(1) The thickness and quality of the finished product should be uniform.

(2) The design of the cooling system should ensure that the temperature of each part of the mold cavity is uniform, and the pouring system should ensure that the material flows symmetrically to prevent warping due to different flow directions and shrinkage rates. The branch channels and main channels of difficult to form parts should be appropriately thickened to eliminate the density, pressure, and temperature differences in the mold cavity as much as possible.

(3) The transition areas and corners of the part thickness should meet lubrication requirements and have excellent demoulding performance, such as adding demoulding redundancy, improving the polishing of the mold surface, and maintaining a balanced ejection system.

(4) Exhaust should be outstanding.

(5) Add the wall thickness or anti warping direction of the part, and strengthen the anti warping ability of the part through reinforcing ribs.

(6) The strength of the material used for the mold is lacking.

2. Plastic:

Crystalline plastics are more prone to warpage than amorphous plastics. In addition, crystalline plastics can undergo a crystallization process to correct warpage, where crystallinity decreases with the addition of a cooling rate, and shrinkage also decreases.

3. Treatment:

(1) If the injection pressure is too high, the holding time is too long, and the melt temperature is too low, the melt speed is too fast, internal stress will be added, causing warpage.

(2) The mold temperature is too high and the cooling time is too short, resulting in overheating and deformation of the parts during demolding.

(3) Reduce the screw rotation speed and back pressure to reduce the density, thereby restricting the occurrence of internal stress while maintaining a minimum filling amount.

(4) If necessary, parts prone to warpage and deformation can be soft molded or milled after demolding.