Bottle cap factory talks about the working principle of mold
When the mold is opened, the injection machine moving template of the bottle cap factory drives the movable mold part to move downwards. Due to the action of the mold opening spring 25, the mold is first divided along the I-I surface, and the pull rod 27 pulls the condensate at the breaking point. At the same time, the oblique guide post 18 drives the sliding block 19 to move outwards, so that the side core 16 is drawn out to a position that does not hinder the product from coming out. When the fixed template 26 is in contact with the shoulder of the fixed-distance tie rod 23, the fixed-distance tie rod 23 drives the stripper 33 to move downward, and the mold is divided along the II-II surface. The stripper 33 makes the point gate pouring system condensate from The main runner bushing 28 and the pull rod 27 are removed from the top.
When the shaft shoulder of the fixed distance tie rod 23 contacts the fixed mold seat plate 17, the parting of the II-II surface stops; the movable mold continues to move downwards, and the mold moves the fixed mold main parting surface PL surface for the third parting, The cavity plate 36 escapes and stays on the side of the movable mold, and is pushed out by the ejection mechanism. Ouming 36 cavity capping machine is worthy to use.
In short, the structure of the bottle cap injection mold is complicated. The mold flow analysis software Moldflow is used to determine the position of the point gate, the pouring system and the lateral core-pulling mechanism are reasonably designed, and the mold structure for motorized extraction of complete (continuous) internal threads is adopted, which avoids the efficiency of removing the condensate of the casting system and manual threading. Low, labor intensity and other shortcomings. Proved by production practice, the mold structure is reasonable, the movement is stable and reliable, the appearance quality of the plastic parts is good, and the production efficiency is high.
The mold ejection mechanism of the bottle cap is unique. It uses an automatic thread ejection mechanism to pull out the internal thread, and the push plate pushes out the plastic part.
In this structure, a motor is used as power. The motor drives the chain 44 to rotate the gear shaft 46, and then drives the threaded core 32 to rotate through the gear 45 and the gear 48. Because the end face of the plastic part has a non-rotating groove with a height of 1 mm (see Figure 1), as shown in Figure 6. The plastic part cannot rotate with the thread core, forcing the plastic part to be pushed upward with the pusher plate 13, so that the internal thread is automatically released.