JPH0743609U - Molding die - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] A narrow space is shared with an extrusion pin in a molding die having a squeeze pin that presses the molten metal immediately before it solidifies. [Structure] A sleeve-shaped ejector member 12 is adjacent to the outer periphery of a squeeze pin 11 that pushes forward and backward to press molten metal on the basis of a die holder, and the ejector member is provided independently by being connected to an ejector plate 4 by a connecting rod. Same operation as other ejector pins.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of a molding die.

[0002]

[Prior art]

 Generally, as shown in FIG. 1, a product of a molding die is extruded by an ejector pin 5 by an operation of an ejector plate 4 located at a rear portion of a movable die 3 against a fixed die 2 attached to a molding machine 1. It is done after opening. Further, in high-pressure casting having a squeeze pin (not shown), the positions of the squeeze pin and the ejector pin 5 are limited depending on the shape of the product, and the squeeze pin and the ejector pin 5 interfere with each other. In such a case, if the squeeze pin is omitted, a healthy product cannot be obtained. On the contrary, if the ejector pin 5 is omitted, the product will be distorted when extruding the product. Therefore, it is common to give priority to the ejector pin 5 and the quality is low. Become.

[0003]

[Problems to be solved by the device]

 Therefore, it is a problem to be solved by the present invention to combine the above-mentioned matters, that is, to configure the role of the squeeze pin and the role of the ejector pin in the mold in close proximity.

[0004]

[Means for Solving the Problems]

 For this reason, a squeeze pin that advances and retreats into and from the cavity on the basis of the holder of the mold and a sleeve-shaped ejector member that holds the squeeze pin are slidably assembled, and the ejector member is connected to the ejector plate located behind the holder of the mold. Tie.

[0005]

[Action]

 Then, the squeeze pin and the sleeve-shaped ejector member having a concentric circle around the limited point can be configured to operate independently, producing a sound product and after mold opening. It is possible to realize that distortion does not occur during product extrusion in a limited space.

[0006]

【Example】

 First, an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, a fixed mold 2 and a movable mold 3 are attached to a vertical molding machine 1, and an ejector plate 4 is formed inside an ejector box 6. Then, the cross member 7 which is an aluminum alloy automobile part of the product shown in FIG. 2 is produced by the above equipment. Reference numerals 8 and 8 are thick portions of the product, which are solidified relatively later than the surroundings. 9 and 9 are the proper product extrusion positions due to the mold structure.

FIG. 3 shows a mold structure of the present invention, and is a vertical cross-sectional view of a cavity 10 formed in a space sandwiched between a fixed mold 2 and a movable mold 3 and across a thick portion 8. . A squeeze pin 11 penetrates the thick portion 8 through a sleeve-shaped ejector member (hereinafter referred to as a sleeve ejector) 12, and the sleeve ejector 12 penetrates a bush 14 fitted to the movable core 13. Further, the squeeze pin 11 can be moved back and forth by the hydraulic cylinder 16 via the plate 15. On the other hand, the sleeve ejector 12 is connected to the ejector plate 4 in the ejector box 6 via the plate 17 and can be moved forward and backward independently of the squeeze pin 11 by a pushing device (not shown) of the vertical molding machine 1.

Next, the operation of the present invention will be described with reference to the above drawings. First, the fixed mold 2 and the movable mold 3 are closed by the operation of the vertical molding machine 1, and then a molten aluminum alloy (not shown) is pushed up into the cavity 10 and press-fitted into the mold. Loses heat and solidifies. Since the amount of heat is large in the process, the squeeze pin 11 moves forward immediately before solidifying the thick portion 7 expected to be the final solidified portion to replenish the molten metal to form a recess and prevent shrinkage cavities. After the mold is opened, a product tray (not shown) advances between the molds, and the ejector plate 4 advances to push down the position where the sleeve ejector 12 does not cause product distortion, and the solidified product falls onto the product tray. .

[0009]

[Effect of device]

 In this way, the sleeve ejector 12 is formed on the outer periphery of the squeeze pin 11 at the limited position, and each of them can move forward and backward independently, so that the roles can be simultaneously fulfilled in a narrow space.

[Brief description of drawings]

FIG. 1 is a view in which a molding die is attached to a molding machine.

[Figure 2] Product drawing.

FIG. 3 is a structural diagram of a mold of the present invention.

[Explanation of symbols]

 1 Molding Machine 2 Fixed Mold 3 Movable Mold 4 Ejector Plate 5 Ejector Pin 6 Ejector Box 7 Cross Member 8 Thick Part 9 Extrusion Position 10 Cavity 11 Squeeze Pin 12 Sleeve Ejector 13 Movable Core 14 Bush 15 Plate 16 Hydraulic Cylinder 17 plates

Claims (1)

[Scope of utility model registration request] 1. A molding die having a squeeze pin for pressing the molten metal pressed into the cavity of the molding die immediately before completion of solidification, wherein a sleeve-shaped ejector member holding the squeeze pin in an inner diameter is used as a product. Molding die characterized by extruding.