Introduction to the production-related knowledge of shenzhen Optical lens mould too!
Release time:
2021-07-08 16:34
Source:
shenzhen Optical lens mould too includes a mold core, the mold core includes an upper mold and a lower mold, the end surface of the lower mold forms a top surface, the outer edge of the top surface is an edge, and the center of the top surface is provided with a concave A mold cavity, the edge of the mold cavity is provided with a flow channel toward the edge portion, and the edge portion is provided with a gate toward the flow channel. The intersecting edge of the mold cavity and the flow channel is close to the flow channel. The side walls of the mold cavity on both sides of the channel are surrounded by a cross-sectional area, and the runner and the gate are connected by a continuous channel; the bottom surface of the cross-sectional area and the bottom surface of the mold cavity form a step at the intersection , And at the step, the level of the bottom surface of the cavity is lower than the level of the bottom surface of the cross section area. Preferably, the bottom surface of the cross-sectional area and the bottom surface of the mold cavity are an inclined transitional step at the intersection.
Further, the vertical distance between the bottom surface of the cross-sectional area and the top surface of the lower mold is greater than the vertical distance between the flow channel and the top surface of the lower mold. Further, the size of the connecting channel gradually increases from the runner to the gate. The side walls of the mold cavity at both sides of the cut-off area near the flow channel are inclined walls, and the top end of the inclined wall is inclined to the end close to the flow channel. Two opposite gates and runners are respectively provided on the edge of the top surface of the lower mold. In the processed mold core structure, a fan-shaped connecting channel is added between the runner and the gate. The purpose is to make the plastic flow more smoothly in the mold during the injection molding process. Because there are multiple mold cavities in the entire set of molds, It is necessary to make each lens in the mold cavity molding process, so that the plastic can be evenly filled in each mold cavity, and the product in each mold cavity can maintain consistency, which can improve the yield rate. The lens mold is used as a double-injection structure. An additional injection point is added on the opposite side of the original injection, and an ejector pin is added under the new runner to balance the ejection force of the product during the ejection process and improve the product during the ejection process. The deformation of the lens increases the qualification rate of the product and improves the problem of poor lens release. At the same time, the edge of the original mold cavity is set in an inclined shape near the flow channel, so that when the mold is ejected on one side, it is not squeezed by the side wall and saves effort without damaging the product.
The above is an introduction to the relevant knowledge of shenzhen Optical lens mould too.
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