News

Can The Single Color Injection Molding Machine Produce The Dual Color Products?

In the field of injection molding, two-color products are increasingly favored by the market due to their unique appearance and functionality. However, two-color products usually require specialized two-color injection molding machines to produce, which confuses many companies that use monochrome injection molding machines: can monochrome injection molding machines really make two-color products? Actually, the answer is yes! Although some clever methods and additional equipment support are required, monochrome injection molding machines can also achieve dual color effects.

Firstly, the core idea of producing two-color products with a monochrome injection molding machine is step-by-step molding. Simply put, it is achieved through two injection molding processes to achieve a dual color effect. The specific operation is to first use a monochrome injection molding machine to produce the first color of the product, and then place this part of the product into another mold for injection molding of the second color. Although this method increases the production steps, it can achieve dual color effects without replacing the equipment.

Secondly, in order to achieve step-by-step molding, it is usually necessary to use turntable molds or rotating molds. Rotary mold is a special mold design that can rotate 180 degrees after a single injection molding to transfer semi-finished products to another mold cavity for a second injection molding. Although this design increases the complexity of the mold, it can significantly improve production efficiency and reduce manual operations.

In practical operation, when producing two-color products with a monochrome injection molding machine, the following points should be noted:

Firstly, in terms of mold design, the precision requirements for rotary or rotating molds are high, and it is necessary to ensure that the two injection molded cavities can be accurately aligned to avoid misalignment or burrs.

Next is material selection. The two colors of plastic materials need to have good compatibility to ensure the strength and appearance quality of the bonding area. In addition, injection molding process parameters also need to be adjusted, such as injection pressure, temperature, and time, to meet the needs of two injection molding processes.

Although monochrome injection molding machines can produce two-color products, there are still some limitations compared to specialized two-color injection molding machines. For example, lower production efficiency, higher mold costs, and higher technical requirements for operators. Therefore, if a company needs to mass produce two-color products, it is recommended to invest in two-color injection molding machines as it is more cost-effective.  

Single color injection molding machines can produce two-color products through step-by-step molding and special mold design. Although this method increases production steps and costs, it is still a feasible solution for certain small batches or special requirements.