JPS61105124U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of a mold having a slide core showing the mold in a closed state in a normal state in an example. FIG. 2 is a cross-sectional view taken along the line A--A in FIG. 1, and shows the cross-sectional state of the peripheral portion of the parallel surface portion. 3, 4, and 5 are cross-sectional views showing the periphery of the parallel type surface portion showing other aspects, and in FIG. 3, the tip of the push-up pin is the first split type. Fig. 4 shows a state in which the push-up pin has a predetermined concave portion on its tip surface, and Fig. 5 shows a state in which the push-up pin has a predetermined convex portion on its tip surface. . FIG. 6 is a cross-sectional view of a main part showing a state in which the rear push-up pin and the slide core formed by molding the resin molded product in the example are driven. FIG. 7 is a plan view of a main part schematically showing the state of the force applied to the resin molded product when the push-up pin and the slide core are driven after the resin molded product is molded in the example. FIG. 8 is a perspective view of the main parts of the resin molded product manufactured in the example. FIG. 9 is a perspective view of a main part of a resin molded product molded by a conventional mold having a slide core. FIG. 10 is an explanatory sectional view showing a state in which an undercut portion of a resin molded product molded by a conventional mold having a slide core contracts and comes into close contact with the slide core. FIG. 11 is an explanatory sectional view showing a state in which a resin molded product follows a slide core and slides in a conventional mold having a slide core. 1... Push-up pin, 2... Slide core, 3... First split type (movable type), 4... Second split type (fixed type), 5
...Cavity, 51...Undercut forming part, 6
... Parallel surface portion, 7... Resin molded product, 71... Undercut portion, 72... Rib, 8... Concave portion or convex portion.

Claims (1)

[Claims for Utility Model Registration] (1) A push-up pin, a slide core that is driven in synchronization with the push-up pin and non-parallel to the push-up pin, and a first division that holds the push-up pin and the slide core so that they can move relative to each other. a mold; and at least one second split mold that forms a mold surface that partitions a cavity together with the push-up pin, the slide core, and the first split mold, and a mold surface that partitions the cavity of the push-up pin. has a configuration including a parallel surface portion substantially parallel to the direction in which the push-up pin is driven, and the molded product molded in the cavity is moved from the first split mold by driving the push-up pin and the slide core. When separating, the movement of the molded product urged by the movement of the slide core in a direction perpendicular to the driving direction of the push-up pin is blocked by the parallel surface portion substantially parallel to the drive direction of the push-up pin; A mold having a slide core, characterized in that the slide core is movable relative to the molded product. (2) A mold having a slide core according to claim 1, wherein the tip of the push-up pin protrudes from the mold surface of the first split mold, and the circumferential surface of the tip of the push-up pin constitutes the mold surface. (3) A utility model in which the tip surface of the push-up pin and the mold surface of the first split mold are substantially on the same level, and the first split mold has a recess defined by a part of the circumferential side of the tip of the push-up pin. A mold having a slide core according to claim 1. (4) A molded product having a slide core according to claim 1, wherein the tip end surface of the push-up pin has at least one of a concave portion and a convex portion including a surface substantially parallel to the direction in which the push-up pin is driven. Type.