Dip Molders vs Injection Molders
Many products can be made both by dip molders and injection molders. Both molding types have advantages and disadvantages, and it can be a difficult choice for a manufacturer to choose which kind of mold to use. However, dip molders have a variety of advantages over injection molders. In most cases, if a dip molding machine can be used instead of a injection molding machine, the dip molding machine is the better choice for the following reasons:
Cost: In general, the cost of dip molding is much less than that of injection molding. This is due to lower equipment costs for the molders themselves, the reduced expense of mold-making, and the lower cost of the plastics used for dip molding.
Faster prototypes: Making the mold for a dip molding machine is a simple process of creating the reverse of the object that you want to make. In dip molding, the mold is dipped into the plastic and the plastic hardens around the mold. Making an injection mold takes longer because it takes several mold prototypes to achieve the final, usable mold.
Many texturing options: With a dip molding machine, it is easy to change the material or texture of the object on the production line. Simply by dipping the same mold into different materials, a company can quickly create different textures and strengths of materials for different uses.
Simple, one-step construction: The dipping process is extremely simple. All the machine has to do is dip the mold into the plastic. Once the plastic hardens, the product is finished. There is no extra tripping, shaping, or fusing multiple parts of the object together.
No joining stress: Injection molds usually have a seam where the two pieces of the mold connect. This seam weakens the bond between the halves of the mold. Dip molding has no seams, and creates a product that can withstand stress from every angle, without any spots that are weaker than others.