JPS6350098Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention is directed to an injection molding machine, in which a nozzle part that contacts the joined mold during injection at a substantially right angle to the direction of movement of the mold is applied to the mold. This invention relates to a device for finely adjusting the abutment position of.

[Prior art and its drawbacks]

To explain the conventional example with reference to FIGS. 5 and 6, reference numeral 21 denotes a fixed platen to which a fixed mold 23 fixed to a machine base 22 is attached, and a movable platen 2 to which a movable mold 24 is attached.
5 moves forward and backward with respect to the fixed plate 21, and both molds 23
and 24 come into contact with each other and separate from each other. Reference numeral 26 denotes an injection unit attached to the machine base 22, which is arranged parallel to the movable direction of the movable platen 25, and comes into contact with the fixed mold 23 by means of a nozzle touch actuator (not shown) to inject molten resin into the cavity. ing. 27 is fixed plate 2
An arm 28 is rotatably attached to the support member 1 via a pivot shaft 29.

An injection unit 30 is fixed to the arm 28, and the injection unit 30 performs injection from a direction perpendicular to the direction of movement of the mold, and except during the injection process, as shown by a chain line 30a, the injection unit 30 performs injection from a direction perpendicular to the direction of movement of the mold. However, it returns to a nearly parallel position. The rotation of the arm 28, that is, the rotation of the injection unit 30, is performed by a hydraulic cylinder 31 provided between the support member 27 and the arm 28.

A nozzle 32 is attached to the tip of the injection unit 30 so that the injection material is ejected substantially perpendicularly to the direction of movement of the mold during injection. 33 is a spacer provided between the fixed platen 21 and the support member 27, and is provided between the molds 23 and 24 of the injection unit 30.
This is to adjust the nozzle touch position.

It is constructed as described above, and its operation will be explained next. During injection, the movable platen 25 is moved to the fixed platen 2 by a mold clamping actuator (not shown).
1, the hydraulic cylinder 31
Pressure oil acts on the molding machine, and the molding machine begins to move toward the inside of the molding machine from the position indicated by the chain line 30a. When the molds 23 and 24 come into contact, the nozzle 32 at the tip of the injection unit 30 touches the molds 23 and 24 from a direction perpendicular to the direction of mold movement, and the hydraulic cylinder 3
1, a nozzle touch force is applied, and the nozzle touch is performed on the injection unit 26 from the direction in which the mold moves. Then each injection unit 26 and 3
A pre-metered amount of molten resin is injected into the cavity.

When the molds are opened, as the molds 23 and 24 are opened, the injection unit 30 is moved back from the nozzle touch position shown in the figure to 30a shown by the chain line by pressure oil acting on the hydraulic cylinder 31.

With the above structure, injection can be performed into the mold cavity from, for example, the mold parting surface. In addition, since the support member 27 is easy to install and its position can be adjusted using the spacer 33, etc., the nozzle touch position can be greatly changed (adjusted) even when the mold thickness is changed or the mold thickness is different. , it can give a great degree of freedom in mold design.

However, with this conventional device, it has been difficult to finely adjust the nozzle touch position, particularly in the mold opening/closing direction.

Put a liner in the spacer 33 and adjust it, or
Although there are methods such as cutting the spacer slightly, it requires removing and adjusting various parts each time, which requires a large amount of man-hours, and improvements are needed.

[Purpose of invention]

This invention was developed to solve this conventional problem, and allows fine adjustment of the mold contact position of an injection molding machine, where the nozzle contacts at a substantially right angle to the direction of mold movement during injection. The purpose is to do so.

[Structure of the idea]

In order to achieve the above-mentioned object, the configuration of the nozzle position adjustment position of the present invention is to move the movable mold forward and backward with respect to the fixed mold of the injection molding machine, and when the two molds are joined, the nozzle position adjustment number position is adjusted. A support member having an insertion hole for a pivot shaft is attached to a fixed plate or machine stand for mounting a fixed mold of an injection molding machine that injects molten resin into the cavity to be formed and molds a molded product, and An injection unit for injecting molten resin is rotatably mounted, and a nozzle portion is formed at the tip of the injection unit so as to contact the joined mold at a substantially right angle to the direction of movement of the mold during injection; An actuator for rotating the injection unit with respect to the support member has one end attached to the injection molding machine rotatably fitted into a shaft insertion hole formed in the support member, and the other end is connected to the rotation shaft. an eccentric shaft that is a cylindrical part eccentric to the other, one end is rotatably locked to the eccentric cylindrical part of the eccentric shaft, and the other end is rotatable to a pivot shaft hole provided in the support member. A link A is rotatably locked to a pivot shaft fitted into the link A, and is rotatably connected to one end of link B, which will be described later. The other end is rotatably attached to a fulcrum shaft fixed to a support member, and the injection unit is rotatably attached to the support member. It is characterized by consisting of a fixed arm.

〔Example〕

One embodiment of the present invention will be explained with reference to FIGS. 1 to 4. Since the present invention is an improvement of the "A" part of the conventional apparatus shown in FIGS. 5 and 6, explanations of the same parts as the conventional apparatus will be omitted.

Reference numeral 51 denotes an eccentric shaft, and as shown in FIG. 3, the cylindrical portion 52 is eccentric by a dimension δ with respect to the rotation axis S. The cylindrical portion 52 is rotatably fitted into a hole provided at one end of the link A53, and the head 54 of the eccentric shaft 51 is fitted into a hole provided at one end of the link A53.
When rotated with a spanner or the like, one end moves on a circumference t with a radius δ centered on the rotation axis S, as shown in the schematic diagram of FIG.

On the other hand, the other end of the link A53 is rotatably connected to one end of the link B57 via a pivot shaft 56 inserted into a shaft insertion hole 55 provided in the support member 27. It is rotatably attached to a fulcrum shaft 58 fixed to.

[Effect of the invention] With the above configuration, when the eccentric shaft rotates about the shaft center S as a fulcrum as described above, one end of the link A has a circumference t with a radius δ centered on the rotation axis S. Move up and one end of link A is A, B, C, D
When the other ends of the link B are at the points F, G, and H on the arc U having the fulcrum shaft 58 as the center and the radius of the link B, the arm 28 to which the injection unit is attached is located. The center of the rotation axis is at position F→G
The nozzle position at the tip of the injection unit also moved at the same time, allowing for fine adjustment.

[Brief explanation of the drawing]

1 to 4 are views showing one embodiment of the present invention, and FIG. 1 is a plan view. Figure 2 is a cross section of Figure 1.
figure. FIG. 3 is a cross-sectional view of FIG. 1. FIG. 4 is a schematic diagram illustrating that the present invention allows for quick adjustment. 5 and 6 are views showing an example of a conventional injection molding machine, and FIG. 5 is a plan view. Figure 6 is a side view.
Touch the injection nozzle from a direction approximately perpendicular to the direction in which the mold moves. 27...Supporting member, 28...Arm, 51...
Eccentric shaft, 53...link A, 56...swivel axis, 5
7... Link B, 58... Fulcrum shaft.

Claims (1)

[Scope of Claim for Utility Model Registration] When a movable mold is moved back and forth with respect to a fixed mold of an injection molding machine and the two molds are joined, molten resin is injected into a cavity formed by both molds, and a molded product is produced. A support member having an insertion hole for a pivot shaft is attached to a fixed mold mounting fixed platen or a machine stand of an injection molding machine for molding, and an injection unit for molten resin injection is attached to the support member so as to be able to rotate. an actuator for rotating the injection unit relative to the support part, the nozzle part being formed in the unit tip member so as to come into contact with the joined mold at a substantially right angle to the direction of movement of the mold during injection; an eccentric shaft, one end of which is attached to the injection molding machine, is rotatably fitted into the shaft insertion hole formed in the support member, and the other end is a cylindrical part eccentric with respect to the rotating shaft; The eccentric shaft is rotatably engaged with an eccentric cylindrical portion, and the other end is rotatably engaged with a pivot shaft that is rotatably fitted into a pivot shaft hole provided in the support member. In addition, a link A is rotatably connected to one end of a link B, which will be described later, and one end is rotatably attached to the other end of the link A via a pivot shaft, and the other end is fixed to a support member. A nozzle position adjustment device comprising: a link B rotatably attached to a fulcrum shaft; and an arm to which an injection unit is attached and rotatably attached to the support member via a pivot shaft.