JP3395089B2 - Horizontal clamping, vertical injection device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal die clamping and vertical injection device for a die casting machine, and more particularly to a support system for the injection device.

[0002]

2. Description of the Related Art A die-casting machine equipped with a horizontal die clamping vertical injection device has an injection sleeve mounted on an extension below a joining surface of a fixed die and a movable die which are horizontally clamped, and a plunger tip of the injection sleeve. It is a die casting machine in which the molten metal is pressed to fill the cavity. For example, in the conventional technique disclosed in Japanese Patent Application Laid-Open No. 4-251649 by the applicant of the present invention, an injection device for driving a plunger chip has a concave end formed at one end between the joint surfaces of a fixed die and a movable die. The tie rod is engaged with the joint portion and is suspended via a tie rod having a convex portion formed at the tip end clamped by the joint surface, and the tie rod directly receives the ejection force of the injection cylinder.

Further, in the application of Japanese Patent Application Laid- Open No. 7-51828 , this injection device is one in which a convex portion and a tie rod are integrally formed, and a vertical injection device provided with two tie rods is suspended for left and right objects. Then, if the convex portion was worn or damaged, the tie rod had to be replaced.

[0004]

However, in the case of a large-sized machine, the injection device itself suspended by the tie rods is large and becomes a considerable heavy object. Further, in Japanese Patent Application Laid- Open No. 7-51828, the distance between the center of the injection sleeve and the center of the tie rod cannot be shortened, and in the case of a large-sized and heavy-weight injection device due to space restrictions, the strength of the tie rod is improved. Therefore, it has been desired to improve a vertical injection device including a tie rod that suspends the injection device.

The present invention has been made in view of the problems of the prior art. An object of the present invention is to provide a tie rod structure capable of withstanding a large ejection force of a large die casting machine using a die for a large casting. An object of the present invention is to provide a horizontal mold clamping and vertical injection device provided.

[0006]

In order to solve the above problems, the horizontal mold clamping and vertical injection device of the present invention has the following means. By moving the movable die plate with respect to the fixed die plate and clamping the mold in the lateral direction, by a tie rod formed with a concave portion engraved on the joining surface of the mold and a convex portion that is detachably provided in the concave portion A horizontal mold clamping and vertical injection device configured to retain the ejection force of a vertical injection device and to inject molten metal into a cavity of a mold, in which a tie rod is vertically slidably inserted. A member for supporting the member on the machine frame so as to be movable in the mold opening and closing direction, and supporting the injection device from the support member through an elevating means for moving the injection device up and down, and moving means for moving the injection device in the mold opening and closing direction. An adapter provided with the convex portion that can be engaged with and disengaged from a concave portion provided on the joint surface of the mold, and a plurality of tie rods that suspend the vertical injection device with the adapter fixed at one end.

Further, the cross-sectional area and the material are selected so that the total tensile strength of the adapter is equal to or more than the total tensile strength of the plurality of tie rods.

[0008]

The operation of the horizontal mold clamping and vertical injection device of the present invention constructed as described above will be described below.

First, the movable die plate is moved to separate the joining surfaces of the fixed mold and the movable mold by an appropriate distance, and then the elevating means and the moving means are operated so that the tip portion of the tie rod is moved to the metal mold. Evacuate to a position that does not interfere with the mold. During die replacement, the moving cylinder and the lifting cylinder are sequentially driven to engage the adapter with the convex portion with the concave portion provided on the joining surface of the die, and the moving die plate is clamped. Hold the tie rod. At the time of casting, with the convex part of the adapter at the tip of the tie rod fitted into the concave part of the joining surface of the fixed mold without using moving means or elevating means, the vertical injection device applies molten metal to the cavity of the mold. Is injected, and by supporting the adapter and the concave portion of the mold, the ejection force of the injection device is maintained and casting is performed. After the casting operation is completed, the moving die plate is retracted and the product is taken out of the mold.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a sectional view showing a main part of a horizontal die clamping vertical injection die casting machine. The die 1 of this die casting machine includes a fixed die 2 and a movable die 3 whose opening and closing directions are horizontal.
The fixed mold 2 is held by a fixed die plate 5 fixed to the machine frame 4. On the other hand, the moving die 3 is attached to the moving die plate 7 placed on the moving table 6. The movable die plate 7 is guided and moved by the tie bar 8 by a mold clamping mechanism (not shown) that moves the movable die plate 7, and the mold is opened and closed.

The cavity 9 has a fixed mold 2 and a movable mold 3.
And one end of the injection sleeve 10 is fitted to the joint surface of the mold. In the case of this embodiment, the injection sleeve 10 is divided into two parts on the joint surface, but an integral type may be used. A hot water supply port 12 is opened on the side surface of such an injection sleeve 10, and the hot water supply port 1
A hot water pipe 14 is connected to 2 via a mouthpiece 13. The molten metal is supplied from the electromagnetic pump 15 or the like into the injection sleeve 10 through the hot water distribution pipe 14, and is pressed from below by the plunger tip 11 of the injection device to fill the cavity 9. In FIG. 1, reference numeral 16 indicates an extruding pin for taking out the product after the mold is opened.

Next, FIGS. 2 and 3 are views showing the mounting structure of the injection device 18 to the mold. This injection device 18
Is suspended in the vertical direction from the mold 2 via a tie rod 22 that engages with the joint surface of the fixed mold 2 and the movable mold 3, and is accommodated in the space 19 inside the machine frame 4. That is, as shown in FIG. 4, a holding frame 21 is attached to the injection cylinder 20 of the injection device 18, and a pair of two tie rods 22 are connected to the holding frame 21 with a nut 23 at one end side as two sets. ing. At the other end of the tie rod 22, a threaded portion 22b is screwed into a convex portion 23 of the adapter 22a, and a concave portion 24 with which the adapter 22a engages is formed symmetrically on the mating surface of the mold 3. . If the distance from the center of the injection cylinder 20 to the center of the tie rod 22 is l and the distance between the tie rods 22 is L, then l = L / 2cos α, so l> L / 2
Therefore, the conventional holding frame 21 can be made smaller, and space saving can be achieved. The tie rod 22 is provided with stoppers 35 and 36 on the upper and lower sides with the support member 26 interposed therebetween, and regulates the upper limit and the lower limit of the moving stroke of the injection cylinder 24. The cross-sectional area and material were selected so that the tensile strengths of the adapter 22a and the plurality of tie rods 22 would be approximately the same.

The vertical position of the injection cylinder 20 is regulated by the hydraulic cylinder 26. A support member 26 fixed to the tie rod 22 is movable along a pair of guide members 28 by a hydraulic cylinder 33 provided in the die casting machine body 5, and is movable in the moving direction of the moving die plate 5.

In this embodiment, the tie rod 22 is slidably inserted into the through hole 25 of the supporting member 26, and the supporting member 26 projects into the machine frame 4 from the shoulder portion 2.
The guide member 28 is attached so as to be movable with respect to the guide member 28 only in the mold opening / closing direction. Further, as shown in FIG. 3, the support member 26 supports the injection cylinder 20 via the first hydraulic cylinder 30. The first hydraulic cylinder 30 constitutes an elevating means for elevating the injection cylinder 20 in the vertical direction, and its piston rod 30 a is connected to the holding frame 21 via a connecting member 31. On the other hand, a second hydraulic cylinder 33, which constitutes a moving means for moving the injection cylinder 20 in the horizontal direction, is installed on the mount 32 fixed to the wall surface. Like the first hydraulic cylinder 30, the first hydraulic cylinder 33 is connected to the support member 26 at the tip end portion (not shown) of the piston rod 33a.

In the above embodiments, hydraulic cylinders are used as the elevating means and moving means, but the present invention is not limited to this. For example, a servo cylinder or a servo motor and a ball screw are assembled. It goes without saying that a driving means such as a combined linear movement mechanism can be used. Further, in order to detect the displacement amount of the injection device 18 in the mold opening / closing direction by the moving means, a displacement amount detection device such as a magnetic scale or a potentiometer is provided, and the injection device 18 is positioned based on the position detection so as to form a mold. Interference can also be prevented.

The present embodiment is configured as described above, and the operation of the present embodiment will be described in the order of the die casting work.

First, the mold apparatus 1 is lifted by a crane or the like and carried into a predetermined position. After that, by using positioning pins and positioning blocks not shown,
The fixed mold 2 is fixed to the fixed die plate 5 and the movable mold 3 is fixed to the movable die plate 7 at correct positions. Then, after the mold is clamped, the fixed mold 2 and the movable mold 3 are clamped to the fixed die plate 5 and the movable die plate 7 by a mold clamping device (not shown).

Next, as shown in FIG. 3, the movable die plate 7 is moved to open the die, and the joining surfaces of the fixed die 2 and the movable die 3 are separated from each other by an appropriate distance. By operating the first hydraulic cylinder 30 and the second hydraulic cylinder 33,
The tip of the tie rod 22 is previously retracted to a position where it does not interfere with the mold.

In this way, when the piston rod of the first hydraulic cylinder 30 retracts, the tie rod 22 rises and eventually the stopper collar 35 attached to the tie rod 22 comes into contact with the lower surface of the support member 26 at a predetermined position. Since the tie rod 22 is prevented from rising, the upper limit of the height position of the tie rod can be positioned.

When the mold is replaced, the first hydraulic cylinder 3
By retracting the piston rod 33a of No. 3 as shown in FIG. 3, the supporting member 26 for supporting the vertical injection device is moved along the pair of guide members 28 provided in the die casting machine body 4 to form the mold for the fixed die plate 5. 3, the convex portion of the adapter 22a at the tip of the tie rod 22 is fitted into the concave portion 24 of the joining surface of the fixed mold 2.

At the time of casting, the moving die plate is used with the convex portion of the adapter 22a at the tip of the tie rod 22 fitted in the concave portion 24 of the joining surface of the fixed mold 2 without using moving means or elevating means. 7 is moved to bring the moving die 3 of the moving die plate 7 into contact with the adapter 22a and the fixed die 2 of the fixed die plate 1 to clamp the die. Then, the injection cylinder 20 injects into the cavities 9 of the molds 2 and 3 to perform die casting. After the die casting is completed, the moving die plate 2 is retracted, and the cast product is separated from the mold 3 and taken out.

As described above, since a plurality of tie rods are detachably coupled to the rectangular adapter in pairs to support the load of the vertical injection device, even if a large mold is used, It can withstand the blast output.

[0024]

According to the present invention, a plurality of tie rods are detachably coupled to a rectangular adapter so as to support a load of a vertical injection device, and therefore a large mold is used. Can withstand the radiant output. Even if the adapter is damaged, it can be easily replaced.

[Brief description of drawings]

FIG. 1 is a side view showing a main part of a horizontal mold clamping and vertical injection device.

FIG. 2 is a cross-sectional view showing a cross section taken along the line AA of FIG.

FIG. 3 is a sectional view showing a BB section in FIG. 2;

FIG. 4 is a cross-sectional view showing a CC cross section in FIG.

[Explanation of symbols]

2 Fixed mold 3 moving mold 5 Fixed die plate 7 Mobile die plate 20 injection cylinder 22 Tie rod 22a adapter

Claims (2)

(57) [Claims] 1. A movable die plate is moved with respect to a fixed die plate to perform lateral mold clamping, and a concave portion engraved on a joining surface of a die and a convex portion detachably provided in the concave portion. The tie rod that formed the
A horizontal mold clamping and vertical injection device configured to inject molten metal into a cavity of a mold, in which a support member having a tie rod slidably inserted in a vertical direction is movable in a mold opening / closing direction. Support means for supporting the injection device from the support member via an elevating means for elevating and lowering the injection device, and moving means for moving the injection device in the mold opening and closing direction, and a recess provided on the joining surface of the mold. A horizontal mold clamping and vertical injection device comprising an adapter having the convex portion detachable from the shape part and a plurality of tie rods for fixing the adapter at one end and suspending the vertical injection device. 2. The horizontal mold clamping according to claim 1, wherein the cross-sectional area and the material are selected such that the total tensile strength of the adapter is equal to or more than the total tensile strength of the plurality of tie rods. Vertical injection device.