JPH0549327U - Injection mold - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] Extrusion plates 3 and 3A provided on movable mold 1A.
Thus, an injection mold can be obtained in which the position where the extrusion rod 8 abuts can be adjusted easily and appropriately. [Structure] An extruding plate 3A that abuts against an extruding rod 8 by a mold opening and is extruded forward to separate a molded product from the movable side mold 1A, is provided at the abutting portion of the extruding plate 3A with the extruding rod 8. An abutting member 9 is provided which is held via an abutting position adjusting means A capable of moving the abutting position of the back and forth.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an injection molding die capable of extremely easily moving and adjusting a position at which an extrusion plate for releasing a molded product from a molding die contacts an extrusion rod to a desired position.

[0002]

[Prior Art]

 FIG. 2 shows a sectional side view of a main part of a conventional injection molding die. In FIG. 2, 1 is a movable side mold of an injection molding die, 2 is a movable side mounting plate, 2a is a hole in the movable side mounting plate 2 through which a pushing rod 8 is inserted, 3 is an extrusion plate, 4 is a spacer block. 5 is a receiving plate, 6 is a mold plate of the movable side mold 1, 7 is an extruding pin which is planted in the extruding plate 3 and ejects a molded product (not shown) to release it, and the extruding rod 8 opens the mold. Accordingly, the push plate 3 is brought into contact with the push plate 3, and the push plate 3 is moved forward, that is, in the direction A of FIG.

In the above structure, when the movable side mold 1 is opened, the push rod 8 is inserted into the hole 2a and the tip thereof contacts the back surface B of the push plate 3. The extruding rod 8 further extrudes a predetermined stroke extruding plate 3, and the extruding plate 3 moves in the direction of arrow A. In response to this movement, the tip of the extruding pin 7 protrudes the molded product, and the extruding pin 7 protrudes. Thus, the molded product is released from the mold plate 6 of the movable side mold 1.

[0004]

[Problems to be solved by the device]

 Since the conventional example is configured as described above, since the pushing rod 8 comes into contact with the pushing plate 3 after being inserted through the hole 2a of the movable side mounting plate 2, depending on the thickness of the movable side mounting plate 2, The tip position, that is, the length of the extruding rod 8 must be adjusted, and it is technically difficult to adjust the position, and if the adjustment is insufficient, the moving stroke of the extruding plate 3 becomes insufficient. When the length of the extruding rod 8 is shortly adjusted, the mold release of the deep container-shaped molded product becomes insufficient, and when the length of the extruding rod 8 is too large, the extruding plate 3 is excessively protruded to cause the extruding rod 8 to protrude. 8 and the extruded plate 3 may be damaged. In addition, there is also a problem that the separation type stroke in which the pushing rod 8 is inserted through the hole 2a becomes long, and the mold release cycle time becomes long.

The present invention has been made in order to solve the problems of the conventional example as described above, and it is very easy to adjust the position where the extruding plate abuts against the extruding rod and to make the extruding stroke of the extruding rod constant. The purpose of the present invention is to provide an injection mold that can be used.

[0006]

[Means for Solving the Problems]

 Therefore, the injection molding die according to the present invention is pushed forward by being brought into contact with the extrusion rod by the mold opening, and the extrusion plate for releasing the molded product from the movable side die is brought into contact with the extrusion rod. It is intended to achieve the above-mentioned object by disposing a contact member which is held via a contact position adjusting means capable of moving and adjusting the position of contact with the pushing rod back and forth.

[0007]

[Action]

 In the injection molding die according to the present invention configured as described above, the abutting position of the abutting member arranged at the rod abutting portion of the extruding plate is adjusted to a desired position by the abutting position adjusting means. By holding and fixing the abutting member, the extrusion stroke of the extrusion plate by the extrusion rod is kept constant without being affected by the fluctuation of the thickness of the movable side mounting plate. Is performed accurately.

As a result, the extrusion stroke can be adjusted extremely easily and in a short time, damage to the molding die caused by insufficient mold release, and the extrusion plate or extrusion rod due to excessive extrusion. Such damages are sufficiently prevented, and the mold release cycle time is reduced.

[0009]

Embodiment An embodiment of the present invention will be described below with reference to the drawings. (Structure) FIG. 1 is a partial side sectional view of an injection molding die showing an embodiment of the present invention. Note that the same or corresponding parts as those of the conventional example are represented by the same reference numerals.

In FIG. 1, 1A is a movable die of an injection molding die, 3A is an extrusion plate, 9 is a contact member that abuts the extrusion rod 8 when the die is opened, and this abutting member 9 is a contact surface. It is provided with a cylindrical hole 9a that opens to S and a screw hole 9b that is formed by penetrating from the bottom surface of the hole 9a to the back surface of the contact member 9. Reference numeral 10 is a screw for adjusting the contact position, and this screw 10 is screwed into a screw hole 3a provided at the center of the contact portion of the extrusion plate 3A with the extrusion rod 8 and fixed to the extrusion plate 3A. There is. Reference numerals 11 and 11 denote lock nuts. One lock nut 11 holds and fixes the screw 10 on the pushing plate 3A, and the other lock nut 11 adjusts the contact position of the contact member 9 and then the contact member 9 Lock the position by holding and fixing. In this case, the length of the tip of the screw 10 is set so that it does not always project from the contact surface S 1 of the contact member 9. The screw holes 3a and 9b, the contact member 9, the screw 10 and the lock nuts 11 and 11 constitute contact position adjusting means A for the contact member 9. B ₁ is the back surface of the movable side mounting plate 2.

(Operation) The operation will be described based on the above configuration. The screw 10 is preliminarily screwed into the screw hole 3a of the extrusion plate 3A, and is securely fixed to the extrusion plate 3A by the lock nut 11 for preventing loosening. Next, the hole 9a of the contact member 9 is directed toward the pushing rod 8 and the screw hole 9b is screwed into the screw 10, so that the contact surface S ₁ of the contact member 9 is flush with the back surface B ₁ of the movable side mounting plate 2. The lock member 11 is used to fix and hold the contact member 9 in the adjusted position.

As a result, the contact surface S _{1 of the} contact member 9 is fixed and held flush with the back surface B ₁ of the movable side mounting plate 2 regardless of the variation in the thickness of the movable side mounting plate 2. The eight extrusion strokes can always be set to the desired length and the release cycle time can be minimized. Therefore, the proper extrusion stroke is always maintained, the molded product is accurately released from the mold, and the injection mold can be sufficiently prevented from being damaged.

The structure of the contact position adjusting means A is not limited to the above embodiment, and when the adjusting range of the pushing stroke is long and the tip of the screw projects from the back surface B _{1 of the} movable side mounting plate, the pushing rod 8 side An escape hole may be appropriately formed in the. Further, the adjustment position of the contact surface S is not limited to being flush with the back surface B ₁ of the movable side mounting plate, and may be positioned at a desired contact position.

[0014]

[Effect of the device]

 As described above, according to the present invention, the contact member is provided at the position where the extrusion plate that releases the molded product by opening the mold contacts the extrusion rod through the contact position adjusting means that adjusts the contact position. Since it is arranged, the proper contact position can be adjusted and set very easily without adjusting the length of the extrusion rod.

Accordingly, it is possible to sufficiently prevent damage to the injection molding die caused by the excess or deficiency of the extrusion stroke due to the variation in the thickness of the movable side mounting plate. Further, since there is no unnecessary extrusion stroke for releasing the molded product, the mold release cycle time can be reduced and the operation rate of the injection molding machine can be improved.

[Brief description of drawings]

FIG. 1 is a partial side sectional view of an essential part of an injection molding die showing an embodiment of the present invention.

FIG. 2 is a side sectional view of a main part of a conventional injection molding die.

[Explanation of symbols]

 1A Movable mold 3A Extrusion plate 8 Extrusion rod 9 Contact member A Contact position adjusting means In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] 1. A position where an extruding plate that abuts against the extruding rod and is extruded forward by mold opening to release a molded product from the movable-side die is in contact with the extruding rod at a position where the extruding plate is in contact with the extruding rod. An injection-molding die, comprising an abutting member that is held via an abutting position adjusting means that can be moved back and forth.