JPH0743610U - Squeeze pin - Google Patents

Abstract

(57) [Summary] [Purpose] The extrusion sleeve and squeeze pin are replaced from the cavity side. [Structure] A pushing sleeve having a through hole for a squeeze pin is screwed to a plate member, and the plate member is connected to an ejector plate by a connecting rod, and the squeeze pin is screwed to a rotation preventing member in contact with a wall surface of a holder recess. And go back and forth,
The connecting rod is a mold structure that penetrates the rotation preventing member and is regulated in the pushing direction to advance and retreat.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of an injection molding die, and more particularly, to a replacement structure of a squeeze pin.

[0002]

[Prior art]

 Generally, a squeeze pin that presses the meat-pressure portion just before solidification is provided in an injection mold for a product having the meat-pressure portion. Extrusion pins are also provided to extrude products. In that case, the squeeze pin and the push pin must be configured in the same part due to the mold space problem, the size of the product area, etc., and the utility model registration filed on May 27, 1993 by the applicant. Although the mold structure disclosed in the application was adopted, the following problems were encountered in practical use. That is, in the structure of the applicant's earlier application, when the squeeze pin is replaced, the cavity core and the holder must be separated and replaced, and during molding, the mold is removed from the molding machine and the above separation is performed. This was a very labor-intensive task. The same applies to the extrusion sleeve.

[0003]

[Problems to be solved by the device]

 Therefore, the problem to be solved by the present application is to allow the squeeze pin to be pushed out and the sleeve to be replaced without separating the cavity core and the holder.

[0004]

[Means for Solving the Problems]

 To this end, a square recess is provided on the back of the mold, and an extrusion sleeve with a through hole for advancing and retracting the squeeze pin is screwed from the cavity side to connect the ejector plate with the plate member located in the recess and in contact with the recess wall surface. The anti-rotation member in which the squeeze pin is screwed from the cavity side is connected by a member, and is pushed and driven so that the anti-rotation member slides while being restricted only in the advancing and retracting direction by the wall surface of the holder recess or the connecting member. Then, the cavity surface of the extrusion sleeve is provided with irregularities for rotation, and the squeeze pin is processed for rotation.

[0005]

[Action]

 By doing so, the cavity surface of the pushing sleeve and the squeeze pin is formed with concavities and convexities due to screwing or untwisting, so that each can be rotated by a jig and exchange can be performed from the cavity surface.

[0006]

【Example】

 Now, an embodiment of the present invention will be described with reference to the drawings. First, referring to the drawings, FIG. 1 shows a movable die base including a movable core 4 in which a movable mold 1 forms a cavity 3 facing a cavity core 2, a movable holder 5, and an ejector plate 6. 7 is attached. A pushing sleeve 10 having a through hole 9 on the outer circumference of the bush 8 is screwed into a plate member 11, and the plate member 11 is connected to the ejector plate 6 by a connecting rod 12. Further, the squeeze pin 14 having the inclined hole 13 is screwed into the rotation preventing member 17 which is in contact with the wall surface 16 of the recess 15 of the holder 5 through the through hole 9, and the rotation preventing member 17 is a hydraulic cylinder fixed to the holder 5. It is designed to be moved back and forth by 18.

FIG. 2 is a single-part view of the pushing sleeve 10 of FIG. 1, showing a screw portion 19 to be screwed and a hole 20 for rotation. And FIG. 3 is a view on arrow A of FIG. Further, FIG. 4 is a single part view of the bush 8 of FIG. 1, and shows a screw portion 21 screwed to the movable holder 5 and a tool hole 22 for rotating. Further, FIG. 5 shows a tool 23, 24 is a protrusion facing the hole 20, 25 and 26 are end portions facing the tool hole 22, and 27 is a stopper.

Subsequently, the operation will be described. First, the operation of replacing the squeeze pin 14 and the extruded through sleeve 10 with the movable die 1 attached to the die base 7 will be described. First, the die base 7 is moved to separate the cavity core 2 from the movable core 4, and then the protrusion 24 of the tool 23 is inserted into the hole 20 of the pushing sleeve 10 and the tool 23 is rotated. Since it penetrates through, the screw portion 19 is easily unscrewed and the pushing sleeve 10 can be removed from the plate member 11. Next, when a tool bar (not shown) is inserted into the inclined hole 13 of the squeeze pin 14 and rotated, the anti-rotation member 15 is in contact with the wall surface 17 of the recess 16, so that only the squeeze pin 14 can be rotated and screwed. Yes, the squeeze pin 14 can be easily removed. Then, if necessary, the end 25 of the tool 23 is inserted into the tool hole 22 of the bush 8 first, and the end 26 is inserted. When the tool 23 is rotated while being urged toward the stopper 27, the bush 8 can be removed. Then, a new push-out sleeve or squeeze pin can be attached in the reverse order of the above.

[0009]

[Effect of device]

 In this way, it is possible to easily remove the mold from the side of the cavity 3 without disassembling it, which is a light work and is superior to the structure previously filed by the applicant.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a single-piece drawing of an extrusion sleeve.

FIG. 3 is a view on arrow A of FIG.

FIG. 4 is a sectional view of a bush.

FIG. 5 is a plan view of a tool.

[Explanation of symbols]

 1 Movable Mold 1 2 Cavity Core 3 Cavity 4 Movable Core 5 Movable Holder 6 Ejector Plate 7 Movable Die Base 7 8 Bushing 9 Through Hole 10 Extrusion Sleeve 11 Plate Member 12 Connecting Rod 13 Sloping Hole 14 Squeeze Pin 15 Recess 16 16 Wall Surface 17 Anti-rotation member 18 Hydraulic cylinder 19 Screw part 20 Hole 21 Screw part 22 Tool hole 23 Tool 24 Projection part 25 End part 26 End part 27 Stopper

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location B29C 45/40 7639-4F

Claims (1)

[Scope of utility model registration request] 1. A molding die having a fixed die or a movable die composed of a cavity core and a holder, and having a push-out sleeve sliding on the outer circumference of a squeeze pin for pushing a material on the verge of solidification, wherein the squeeze pin penetrates. A plate member contacting the wall surface of the holder recess is screwed into the ejector plate by a connecting member, and the rotation preventing member screwed with the squeeze pin is restricted in the forward or backward direction by the holder or the connecting member. And a sliding die, and the rotation preventing member is driven so as to move back and forth from behind the holder.