Technical parameters of the plastic cap mould

  Technical parameters of the mold clamping device part of the plastic mold

•   1. The clamping force (clamping force) refers to the clamping force (KN) that the clamping mechanism of the injection machine can apply to the mold.
•   2. Clamping speed (m / s) The highest speed of moving mold.
•   3. Mould opening force (KN) To take out the product, the max.
•   4. Mold opening speed (M / S) The speed of moving the mold when the mold is opened.
•   5. Ejection force (KN) The maximum thrust of the ejection device.
•   6, mold temperature control parameters (℃), the mold requires a constant temperature value.
•   7. The basic dimensions of the clamping device.

Introduction to the technical development of plastic bottle cap trays mould

The classification of plastic bottle cap mould manufacturing technology

        Generally divided into forms: can be divided into single-piece caps and double-piece caps; single-piece caps: there is no gasket inside the bottle cap, and the entire cap material is the same, which is sealed by folding or inner plugs; Cap: There is a gasket inside the bottle cap, the gasket material is soft, and it depends on the rebound force of the compressed gasket to maintain the seal; Comparison: ⑴, single-chip caps have no pads and do not need a pad machine, so the equipment investment is more than two Cover less. Moreover, the price of gasket material is more than twice that of the cover material, and the cost of a single-piece cap is lower than that of a double-piece cap; The rebound force presses the outer edge and the end surface of the bottle mouth to seal; the inner plug type single piece cap is sealed by the interference fit between the outer diameter of the inner plug and the inner diameter of the bottle mouth. The gasket of the two-piece cap is relatively soft, and has a large tolerance for bottle mouth defects.
        The production process of injection cap is as follows: the suction machine sucks the mixed material into the barrel of the injection molding machine, heats it in the barrel to melt and plasticize, and injects it into the mold cavity, cools the mold in the cavity, molds out, and then passes Cut rings and pads to complete the production of injection caps. The production process of the compression molding cap is: the suction machine sucks the mixed material into the barrel of the compression molding machine, and after heating in the barrel to a semi-melted plastic state, it is quantitatively extruded into the mold cavity, the upper and lower molds are closed, Compression molding, cooling and shaping, demoulding, and then cutting the ring and padding, complete the production of compression molding caps. 
        Comparison between injection molding and compression molding: ⑴, injection caps need to heat the material to a melt flow state at a temperature of about 250 ° C; compression molding only needs to be heated to about 180 ° C, and the energy consumption of the injection cap is higher than that of the injection cap; The temperature of compression molding is relatively low, the shrinkage is small, and the size of the cap is more accurate. ⑶ Fill all the cavities at one time by injection molding, and extrude one bottle cap at a time by compression molding. Compression molding extrusion pressure is small, while injection molding requires high pressure; ⑷, the injection mold is large, and the replacement of a single cavity is troublesome; each cavity of the compression molding is relatively independent and can be replaced independently; ⑸, the compression molding cap making machine is The bottle cap special machine has a mold release design specifically for the bottle cap; the bottle cap injection molding machine basically has no special design for the bottle cap, so the compression molded cap can be made into a bell mouth, and the cap hanging rate is high.