Two kinds of plastic materials are injected on the same injection molding machine and molded in two times, but the product is only molded once. This forming technique, also commonly known as two-material injection, is usually done with one mold and requires a dedicated two-color forming machine.Suzhou two-color moldAt present, it is becoming more and more popular in the market, but this technology makes the product more beautiful in appearance, easy to change color, and can be used without painting, but the cost is high and the technical requirements are high. Then, let's learn about the difference between Suzhou two-color mold and plastic-coated mold!

Advantages of Suzhou two-color mold: Suzhou two-color mold can make two different characteristics of resin and color into a two-color product, thereby reducing the assembly and post-processing of plastic parts. Save melting and printing costs, improve the visual effect of the product, and improve the grade and added value of the product. It not only has the function of non-slip and improving friction, but also conforms to ergonomics through the soft resin material and makes it feel better. Two-color molding has high quality stability, controllable product deformation, short molding cycle, high output, 7% lower loss than plastic package injection molding, and 20%-30% lower product manufacturing cost than plastic package.

Two-color forming principle: Suzhou two-color mold forming usually refers to two-color or different types of plastic molding, but because the two sets of injection units and injection nozzles of the two-color machine are independently separated, the color of the finished product is mostly two-color clear and not mixed. The biggest difference between the two-color mold forming machine and the ordinary injection molding machine is the design of the movable template of the injection unit machine. In general, the two-color mold has two sets of independent injection units, and the general injection machine has only one set of injection units. The configuration of the two groups of injection units has various forms according to the design of each manufacturer. However, for the design of the movable mounting template, a rotating mechanism must be provided. Generally, the common design includes adding a turntable and a rotating shaft mechanism, etc., providing a 180 reciprocating rotation function, and performing cyclic action on the mold. In addition, there are also special two-color types that do not require a turntable and a rotating shaft mechanism and rotate alternately or horizontally through mold sliding.

Production process characteristics of Suzhou two-color mold products

1 Suzhou two-color mold forming machine consists of two sets of plasticizing injection devices with exactly the same structure and specifications. For different production methods, the nozzle must have a special structure, or have two sets of molds with the same structure that can be rotated and displaced. When plasticizing injection, it is required that the melt temperature, injection pressure, injection melt volume and other process parameters in the two plasticizing injection devices are the same, and the fluctuation difference of the process parameters in the two devices must be minimized.

2. Compared with ordinary injection plastic products, the melt temperature and injection pressure of injection molding adopt higher parameter values. The main reason is that the two-color injection molding mold runner is longer, the structure is more complex, and the flow resistance of the injection melt is large.

3. Two-color mold molding plastic products, to choose good thermal stability, low melt viscosity of raw materials, so as to avoid high melt temperature, long residence time in the flow path and decomposition. Commonly used plastics are polyolefin resin, polystyrene, ABS materials. Dichroic plastic injection molding, in order to ensure that the two different colors of the melt in the molding mold fully welded, to ensure the quality of injection molding products, should be used high melt temperature, high mold temperature, high injection pressure and injection speed.

Suzhou two-color mold structure form

The traditional two-color die has two forms of "punch movement" and "punch rotation.

The "convex translation" die has two concave and one convex. When the first cylinder is injected with rubber, the male die and the first female die are closed. Complete the first plastic injection. After the first plastic solidifies, the concave mold and the convex mold are separated, and the semi-finished product made of the first plastic stays on the convex mold and moves together with the convex mold to the position corresponding to the second concave mold. After the injection molding machine is closed, the second cylinder performs the injection of the second plastic. After the second plastic solidifies, the injection molding machine opens the mold and takes out the complete product.

The two-color die in the form of "convex rotation" has two concave and two convex forms combined back to back, which can be rotated. Both two-color molds have two cylinders, and the second cylinder is preferably designed to be perpendicular to the direction of movement of the injection molding machine. Two different plastics can be injected at the same time. After the incident two kinds of plastic solidify, the injection molding machine is opened and the complete product is automatically extruded. After removing the product, the "rotatable punch" is rotated 180 degrees. The injection molding machine is closed for the next cycle.

The above introduction is the difference between Suzhou two-color mold and plastic-coated mold, if you need to know moreSuzhou plastic mold making, remote control mold, Suzhou two-color injection molding,, can contact us at any time!