JP2529291Y2 - Injection equipment for injection molding equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an injection molding apparatus such as a die kamato machine or an injection molding machine in which the injection position can be changed in the vertical direction in accordance with the injection conditions of a mold to be used. The present invention relates to an injection device of a molding device.

[0002]

2. Description of the Related Art Conventionally, when changing the injection position in a die casting machine, for example, an apparatus as shown in FIG. 6 has been used. 6, reference numeral 1 denotes a fixed plate on which a fixed die is mounted, 2 denotes a C-shaped frame fixed to a rear end surface of the fixed plate 1 with bolts 3, and 4 denotes a bolt on a rear end surface of the C-shaped frame 2 on the side opposite the fixed plate 1. An injection cylinder fixed at 5, an auxiliary device such as a valve or an accumulator attached to the rear of the injection cylinder 4, an injection sleeve 7, and a piston rod 9 of the injection cylinder 4 coaxially integrated with a piston rod 9 via a coupling 10. An injection plunger 11 is provided below the center of gravity of the injection cylinder 4 and is a single hydraulic cylinder for raising and lowering the injection cylinder 1, and 12 is a machine base. To change the injection position, the coupling 10 is removed, the injection sleeve 7 and the injection plunger 8 are moved to desired positions, the bolt 5 is removed, and the connection between the injection cylinder 4 and the C-shaped frame 2 is cut off. Cylinder 1
1 is operated to move the injection cylinder 4 up and down to a desired position. After that, the injection cylinder 4 is attached to the C-shaped frame 2 with the bolt 5 and the coupling 10
Attach the injection plunger 8 to the piston rod 9.

[0003]

In order to change the injection position up and down in such a device, one hydraulic cylinder 11 moves the entire injection cylinder 4 up and down.
Poor stability, time required for setup work. When the injection position is changed, the injection cylinder 4 and the injection plunger 8 are changed.
And the accuracy of centering between the injection sleeve 7 mounted on the fixed board is deteriorated. As a result, troublesome and difficult centering work is required.

In such an apparatus, when the front portion of the injection cylinder 4 is fixed to the rear end face of the C-shaped frame 2, the flange portion 4a at the front end of the injection cylinder 4 is attached to the C-shaped frame 2 with bolts 5. As a result, a large injection reaction force is applied to the bolt 5 during injection. Therefore, not only was a large-sized bolt necessary, but also it was difficult to remove and attach the bolt.

[0005]

In order to solve such a problem, in the present invention, a holding plate for holding an injection cylinder is provided in a vertical state around a front end of the injection cylinder.
The holding plate and the fixed plate for fixing the fixed mold are connected by several tie rods, and the holding plate is provided with a guide portion for guiding the elevation of the injection cylinder. A hydraulic cylinder for raising and lowering the injection cylinder is provided below the center of gravity of the injection cylinder, and a guide member for raising and lowering is provided below the rear end of the injection cylinder.

[0006]

When the injection position is to be changed in the vertical direction, the portion of the injection cylinder attached to the front of the holding plate is removed from the holding plate, and the hydraulic cylinder is operated to move the injection cylinder to a desired position. After moving the injection cylinder, attach it to the holding plate. In the injection state, since the injection reaction force acts on the front surface of the holding plate via the portion of the injection cylinder that is in front of the holding plate, a large force is applied to the bolts that attach the injection cylinder to the holding plate. Does not work.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a front view (a longitudinal sectional view of a part) of an injection device of a die casting machine, FIG. 2 is a plan view, and FIG.
4 is a sectional view taken along line BB of FIG. 3, and FIG. 5 is a sectional view taken along line CC of FIG.

In FIGS. 1 to 5, reference numeral 1 denotes a fixed plate for mounting a fixed mold, 1a denotes an injection sleeve mounting hole provided at several positions in the vertical direction, 1b denotes a column, 4 denotes an injection cylinder, and 6 denotes an injection cylinder. Attached devices such as valves, manifolds, and accumulators mounted on the cylinder 4, 7 is an injection sleep, 8 is an injection plunger, 9 is a piston rod of the injection cylinder 4, and 10 connects the piston rod 9 and the injection plunger 8. 12 is machine-based.

Around the front end of the injection cylinder 4, a holding plate 20 for holding the injection cylinder is mounted on the machine base 12 in a vertical state. The holding plate 20 is mounted on the machine base 12 as shown in FIG.
This is performed by inserting a part of the hook-shaped holder 21 into the grooves 20a on both sides of the lower end of the, and pushing the holder 21 with adjustment bolts 22. The holding plate 20 is provided at a predetermined distance from the fixed plate 1 and in parallel with the fixed plate 1, and between the holding plate 20 and the fixed plate 1 is an upper central portion 1.
It is connected to the book by two tie rods 23 on both lower sides.

At the center of the holding plate 20, an injection cylinder 4 is provided.
A square hole 24 of an appropriate size is provided so that the main body can move up and down. On the front side of the holding plate 20, a rectangular flange portion 4a is provided so as to protrude from both sides of the main body of the injection cylinder 4 on both sides. 25
Is a guide plate having a hook-shaped cross section which is vertically attached to both sides of the front surface of the holding plate 20 with a plurality of bolts 25a. The portion of the guide plate 25 which projects forward from the holding plate 20 of the injection cylinder 4. That is, the vertical portion 4b on both sides of the flange portion 4a and the front and rear surfaces near both sides are guided so as to be slidable up and down. The flange portion 4a is detachably attached to a part of the holding plate 20 with a plurality of bolts 4c. At the time of injection, an injection reaction force acts rearward on the body of the injection cylinder 4, but the flange portion 4a is located on the front surface of the holding plate 20, and the flange portion 4a is pressed against the holding plate 20 at the time of injection. No injection reaction force acts on the bolt 4c. Therefore, the bolt 4c has a very small size. Reference numeral 26 denotes a spacer to be inserted into the hole 24 of the holding plate 20.
0 is attached. As shown in FIGS. 1 and 3, when the injection position is on the lower side, the spacer 26 is above the injection cylinder 4, and when the injection position is moved upward, the spacer 26 is on the lower side of the injection cylinder 4. To be charged.
Due to the presence of the spacer 26, the injection cylinder 4 can be accurately positioned at the injection position.

Below the center of gravity of the injection cylinder 4, a hydraulic cylinder 27 for raising and lowering the injection cylinder is provided facing upward. That is, the hydraulic cylinder 27 is
The front end of the piston rod of the hydraulic cylinder 27 is attached to the lower surface of the center of gravity of the injection cylinder 4. Reference numeral 29 denotes an elevating / lowering guide rod provided at a lower portion on the rear end side of the injection cylinder 4. The vertical guide rod 29 is a vertical cylindrical guide 3 provided on the machine base 12 side.
0 slidably provided.

In the above embodiment, the injection position is vertically
Although FIG. 1 to FIG. 5 show the case where the injection position is on the lower side, the case where the injection position is shifted to the upper side is performed as follows. First, the bolt 26a is removed to remove the spacer 26 from the hole 24 of the holding plate 20, and the bolt 4c is removed so that the injection cylinder 4 can be moved upward, and the coupling 9 is removed to remove the piston rod. The connection between 9 and the injection plunger 8 is cut off.

In this state, the hydraulic cylinder 27 is operated to lift the injection cylinder 4 upward, thereby moving the injection position to the upper stage. During this ascent, the hydraulic cylinder 27 is located below the center of gravity of the injection cylinder 4, and the guide plate 25 guides the flange 4 a at the front end of the injection cylinder 4, and the rear end of the injection cylinder 4. As the guide 30 guides the guide rod 29, the injection cylinder 4 rises smoothly. When the injection cylinder 4 moves to the upper side,
The spacer 26 is mounted in the hole 24 of the holding plate 20, and the flange 4a of the injection cylinder 4 is fixed to the holding plate 20 with the bolt 4C. Then, naturally, the injection cylinder 4 is positioned at the upper position, and the core comes out. On the other hand, the injection sleeve 7 and the injection plunger 8 also
After being moved to the upper position a, the injection plunger 8 is connected to the piston rod 9 of the injection syringe 4 by the coupling 10. When the injection position is moved from the upper stage to the lower stage, the same procedure is used.

At the time of injection, the molten metal is put in the injection sleeve 7 and the piston rod 9 of the injection cylinder 4 is
Is advanced and the molten metal is injected into a mold (not shown) by the advancing operation of the injection plunger 8, and at this time, a very large injection force acts. Naturally, a very large injection reaction force acts on the main body of the injection cylinder 4 rearward. However, in the present invention, the flange portion 4a of the injection cylinder 4 is located on the front side of the holding plate 20, and the rear surface of the flange portion 4a is in direct contact with the front surface of the holding plate 20 and is held in a pressed state. The plate 4a is held by the holding plate 20
The injection reaction force does not act on the bolt 4c attached to.
Therefore, the bolt 4c may have a very small size because it only needs to have a function of positioning. The injection reaction force is absorbed by the holding plate 20, the tie rods 23, and the fixed platen 1.

[0015]

[Effect of the Invention] In the present invention, a holding plate for holding the injection cylinder is provided vertically around the front end of the injection cylinder, and this holding plate and a fixed plate for mounting the fixed mold are connected by several tie rods. In addition, the holding plate is provided with a guide part for the injection cylinder lifting guide, and the part protruding from the front of the holding plate of the injection cylinder is mounted on the front of the holding plate so that it can be detached and injected below the center of gravity of the injection cylinder. Hydraulic cylinder for raising and lowering the cylinder is provided, and a guide member for raising and lowering is provided at the lower part on the rear end side of the injection cylinder, so that the vertical movement of the injection cylinder is balanced and the work of changing the injection position is performed easily and smoothly. Alignment of injection can be performed with high accuracy. In addition, since a portion protruding from the front surface of the holding plate of the injection cylinder is provided on the front surface of the holding plate, a large injection reaction force at the time of injection comes out of the front surface of the holding plate including the flange portion of the injection cylinder. The state is transmitted directly from the rear surface of the portion to the front surface of the holding plate, and the injection reaction force applied to the injection cylinder is directly received by the holding plate. As a result, the injection reaction force does not act on the bolt for holding the injection cylinder on the holding plate, and naturally a large tensile force unlike the conventional one does not act. Only small things are needed. In addition, as a result, the apparatus becomes simple, the work of attaching and detaching the attachment member becomes easy, and the work efficiency is improved.

[Brief description of the drawings]

FIG. 1 is a front view of a part of a device showing an embodiment of the present invention.

FIG. 2 is a plan view of the device showing one embodiment of the present invention.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a sectional view taken along line BB of FIG. 3;

FIG. 5 is a sectional view taken along line CC of FIG. 3;

FIG. 6 is a front view showing an example of a conventional device similar to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixed board 4 Injection cylinder 4c Flange part 4c Bolt 7 Injection sleeve 8 Injection plunger 20 Holding plate 23 Tie rod 24 Hole 25 Guide plate 26 Spacer 27 Hydraulic cylinder 29 Guide rod 30 Guide

Claims (1)

(57) [Scope of request for utility model registration] 1. A holding plate for holding an injection cylinder is provided vertically around a front end portion of an injection cylinder, and the holding plate and a fixing plate for attaching a fixed mold are connected by several tie rods. A guide portion for the injection cylinder elevating guide is provided, and a portion protruding from the front surface of the injection cylinder holding plate is detachably provided on the front surface of the holding plate, and a hydraulic pressure for raising and lowering the injection cylinder is provided below the center of gravity of the injection cylinder. Shi
The provided Linda, injection unit of an injection molding apparatus provided with guide members for lifting the rear end lower portion of the injection cylinder.