The production process of the injection molded cap is as follows:
The suction machine sucks the mixed material into the barrel of the injection molding machine, heats it in the barrel until melted and plasticized, and then injects it into the mold
Cavity, cooling and shaping in the cavity, demoulding, and then cutting the ring and adding pads to complete the production of injection molded caps.
The production process of compression plastic cap is:
The suction machine sucks the mixed material into the barrel of the compression molding machine, and after heating it to a semi-molten plastic state in the barrel, it is extruded quantitatively.
Out into the mold cavity, the upper and lower molds are closed, compression molded and cooled to shape, demolded, and then cut rings and pads to complete the compression molding
cover production.
Compare:
⑴. The injection molding cap needs to heat the material to a molten flow state, and the temperature is about 250°C; the compression molding only needs to be heated to
At about 180°C, the energy consumption of the injection molded cover is higher than that of the pressure injection cover;
⑵, the compression molding processing temperature is low, the shrinkage is small, and the size of the cover is more accurate;
⑶. Injection molding fills all the mold cavities at one time, and compression molding extrudes one bottle cap material at a time. The extrusion pressure of compression molding is very small, and the injection
The pressure required for molding is relatively high;
⑷. The injection mold is large in size, and it is troublesome to replace a single cavity; each cavity of compression molding is relatively independent and can be replaced separately;
⑸. The compression molding cap making machine is a special machine for bottle caps, and has a demoulding design specially for bottle caps; bottle cap injection molding machines basically have no needles.
The special design for the bottle cap, so the compression molded cap can be made into a bell mouth, the cap hanging rate is high, and the user likes to use it.
Post time: Feb-08-2023