JPH091605A - Mold opening device for injection mold - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a mold opening device for an injection mold which can reduce the number of steps of mold disassembly maintenance work, prevent the occurrence of mold accidents, and have good work efficiency. . [Structure] A movable side mold 3 and a fixed side mold 4 that form back plates 7 and 11 on opposite sides to opposed surfaces 1 and 2 that are connected to face each other are separated from the connected state, and both molds are separated. This is a mold opening device for an injection molding die in which the dies 3, 4 are disassembled and maintained, and the two dies 3, 4 are connected again. The back plate abutting portion 14 and the hydraulic chuck 12 for fixing the back plate 7 of the movable mold 3 and the back plate abutting portion 15 and the hydraulic chuck 13 for fixing the back plate 11 of the fixed mold 4 are provided. Side-by-side abutting parts 1 installed side by side in the horizontal direction
The hydraulic cylinders 21 and 22 for slides capable of moving the distances 4 and 15 close to and away from each other are provided, and the back plate contact portions 14 and 15 are further provided.
Inverting hydraulic cylinders 23, 24 for rotating the back plate fixing surfaces 14a, 15a of the above are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold opening device for an injection molding die which is mainly used for disassembly, inspection and maintenance of the injection molding die.

[0002]

2. Description of the Related Art As a conventional mold opening device for this type of injection molding die, for example, one shown in FIG. 3 is known.

In such a mold opening device for an injection molding die, as shown in FIG. 3 (a), the movable side die 3 and the fixed side die 4 which connect the facing surfaces 1 and 2 to each other face to face. Is lifted by the crane 5 and placed on the reversing machine 6.

The reversing machine 6 is formed integrally with a back plate receiving surface 8 against which the back plate 7 of the movable mold 3 is abutted, and is orthogonal to the back plate receiving surface 8. Both molds 3,
4 has a base-side receiving surface 9 to be placed first, and a rotary shaft 10 for reversing the back plate receiving surface 8 and the base-side receiving surface 9 by 90 ° at the same time.

Then, as shown in FIG. 3 (b), when the back plate receiving surface 8 and the base side receiving surface 9 are inverted by 90 ° about the rotary shaft 10 at the same time, the fixed side metal The back plate 11 of the mold 4 faces upward.

Next, as shown in FIG. 3C, the molds are opened, and the back plate 11 of the fixed mold 4 is lifted by the crane 5 to move the movable mold 3. Perform dismantling maintenance work.

After the dismantling and maintenance work, the crane 5 is used again.
The fixed mold 4 is lowered and the mold is closed.

In order to perform the dismantling maintenance work of the fixed side mold 4, the back plate receiving surface 8 and the back plate receiving surface 8 from the state shown in FIG. 3B to the state shown in FIG. At the same time, the base-side receiving surface 9 is reversed by 90 ° in the opposite direction.

Then, the crane 5 is lifted to bring the back plate 11 of the fixed mold 4 into contact with the back plate receiving surface 8,
It was placed again and the above steps were repeated.

[0010]

However, in such a conventional mold opening device for an injection mold, the crane 5 is used several times to lift the molds 3 and 4 and to re-mount them. There were many dismantling work steps and the work efficiency was not good.

When the mold is opened and hoisted by the crane 5, if the mold has a poor weight balance, the mold cannot be opened due to the inclination of the mold, or the movable side is moved when the mold is opened and closed. There is a problem that the mold 3 and the fixed-side mold 4 may come into contact with each other and be deformed, causing a so-called mold accident.

Further, when the fixed side mold 4 as shown in FIG. 3 (c) is lifted by the crane 5 and the movable side mold 3 is disassembled and maintained, the fixed side mold 4 is positioned above the head. If there is, it is dangerous, so once from above the movable mold 3,
I was evacuating. For this reason, the number of working steps is further increased, and in this respect as well, there is a problem that working efficiency is not good.

Therefore, the present invention provides a mold opening device for an injection mold, which can reduce the number of steps of the mold disassembly maintenance work, prevent the occurrence of mold accidents, and have good working efficiency. That is the issue.

[0014]

In order to solve the above-mentioned problems, according to a first aspect of the present invention, a movable side metal forming a back plate on the opposite side to the facing surfaces connected to each other. A mold opening device for an injection molding mold, in which a mold and a fixed-side mold are separated from the connected state, disassembly maintenance of the both molds is performed, and the both molds are connected again. A movable side mold fixing means for fixing the back plate of the mold and a fixed side mold fixing means for fixing the back plate of the fixed side mold are horizontally arranged side by side, and between the both mold fixing means. Of an injection molding die provided with a horizontal movement means capable of approaching and separating a distance, and further provided with a back plate fixing surface rotating means for rotating the back plate fixing surface of each of the mold fixing means so as to face upward. It features a mold opening device.

[0015]

[Operation] According to the claim 1 having such a configuration,
In the mold closed state, the movable side mold fixing means fixes the back plate of the movable side mold, and the fixed side mold fixing means fixes the back plate of the fixed side mold.

After the mold is opened, the horizontal moving means separates the horizontal distance between the two mold fixing means, and the back plate fixing surface rotating means is used to make the back plate of each mold fixing means. Rotate so that the fixed surface faces upward.

Therefore, the movable side mold and the fixed side mold can be disassembled and maintained at the same time, and the work steps can be reduced.

Further, unlike the prior art, it is not necessary to retract the lifted die for avoiding danger, and the work can be performed safely and efficiently.

After the dismantling and maintenance work, the back plate fixing surfaces are rotated in the opposite direction by using the back plate fixing surface rotating means so that the both back plate fixing surfaces face each other.

Then, using the horizontal moving means,
The horizontal distance between the two mold fixing means is reduced.
Both dies do not require the work of suspending them with a crane as in the conventional process. Therefore, without being affected by the weight balance, it matches at the same position as when the mold is opened,
The mold can be closed and there is no risk of mold accident such as contact.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show a first embodiment of the present invention. It should be noted that the same or equivalent parts as those of the conventional mold opening device of the injection molding die will be described with the same reference numerals.

First, the construction will be described. In the mold opening device of the injection molding die according to the first embodiment, the back plates 7 and 11 are formed on the opposite sides of the facing surfaces 1 and 2 which are connected to face each other. The movable side mold 3 and the fixed side mold 4 are separated from the connected state, disassembly maintenance of the both molds 3 and 4 is performed, and the both molds 3 and 4 are connected again.

This mold opening device includes back plate abutting portions 14, 1
5 are provided. The back plate abutting portions 14 and 15 have flat plate-like back plate fixing surfaces 14 with which the back plates 7 and 11 abut.
a and 15a are formed respectively. Further, a plurality of hydraulic chucks 12 serving as movable side mold fixing means for fixing the back plate 7 of the movable side mold 3 in a contact state to the back plate contact portions 14 and 15, and the fixed side. A hydraulic chuck 13 as fixed die fixing means for fixing the back plate 11 of the die 4 in a contact state is provided.

The back plate abutting portions 14 and 15 are mounted on the carriages 16 and 17 which are arranged side by side so as to be slidable in the horizontal direction, and the rotary shaft 1 is provided.
It is rotatably supported around 8 and 19 as the center of rotation.

The carriages 16 and 17 are arranged on the rail 20 and slide on the rail 20 by the action of the hydraulic cylinders 21 and 22 for sliding as horizontal moving means to contact the back plates. The portions 14 and 15 are configured so that the distance between the portions 14 and 15 can approach and separate from each other.

Further, one end 23a, 24a is connected to each of the back plate abutting portions 14, 15 of each of the carriages 16, 17 to rotate the back plate fixing surfaces 14a, 15a upward. Inverting hydraulic cylinder 2 as a plate fixing surface rotating means
3, 24 are provided.

Then, each of the carriages 16 and 17 has
A back plate support member is provided which supports the back plate contact portions 14 and 15 which are rotated upward.

Further, in this embodiment, the back plate contact portion 1 is
On the back side of the back plate fixing surface 14a of No. 4, as an ejector device for confirming the operation of the mold, the movable side mold 3 fixed to the back plate fixing surface 14a by the hydraulic chucks 12 ... An extruding pin cylinder 25 for extruding with a pin is provided.

Next, the operation of this embodiment will be described with reference to the process flow chart of FIG.

First, as shown in FIG. 2 (a), the movable mold 3 and the fixed mold 4 are lifted up by the crane 5 in a mold closed state, and the back plate abutting portions 14, 15 are lifted. Insert it in between and move the carriages 16 and 17 along the rails,
On the back plates 7 and 11 of the movable mold 3 and the fixed mold 4,
The back plate fixing surfaces 14a and 15a are brought into contact with each other.

Next, as shown in FIG. 2 (b), hydraulic fluid is supplied to the hydraulic chucks 12 ... And 13 ... to clamp the back plates 7 and 11 to move the movable side mold 3. The back plate 7 is fixed to the back plate fixing surface 14a, and the back plate 11 of the fixed mold 4 is fixed to the back plate fixing surface 15a. In this embodiment, each hydraulic chuck 12 ... And 13
Since the respective dies 3 and 4 are fixed by using ..., The fixing can be performed with one touch by simply supplying the hydraulic oil, and the dies can be immediately opened.

After the mold is opened, as shown in FIG. 2 (c), the carriage 16 is moved by the slide hydraulic cylinders 21 and 22.
17 is moved along the rail 20 to separate the horizontal distance between the back plate fixing surfaces 14a and 15a.
At this time, since the molds 3 and 4 move in the horizontal direction,
There is no risk of causing a mold accident by linearly opening the mold without being affected by weight balance as in the conventional case.

Next, as shown in FIG. 2D, the back plate fixing surface 14 is formed by using the reversing hydraulic cylinders 23 and 24.
Rotate a and 15a so as to face upward. The back plate contact portions 14 and 15 rotate about the rotation shafts 18 and 19 and contact the back plate support members 16a and 17a, respectively, and the facing surfaces 1 of the respective molds 3 and 4. , 2 each point upwards and stop.

Therefore, the movable side mold 3 and the fixed side mold 4 can be simultaneously disassembled and maintained, and the number of working steps can be reduced.

Further, unlike the prior art, it is not necessary to retract the lifted mold for avoiding danger, and the molds 3,
4 with the facing surfaces 1 and 2 facing upward, and the back plate contact portion 1
Since it is placed on top of Nos. 4 and 15, work can be performed safely and efficiently.

After the dismantling maintenance work, as shown in FIG. 2 (e), by using the reversing hydraulic cylinders 23 and 24, the back plate fixing surfaces 14a and 15a are arranged so as to face each other. Rotate the fixed surface in the opposite direction.

Then, as shown in FIG. 2F, the carriage 1 is constructed by using the sliding hydraulic cylinders 21 and 22.
6 and 17 are moved along the rail 20 to bring the back plate contact portions 14 and 15 closer to each other in the horizontal direction. Since the two dies 3 and 4 do not have the work of suspending them with the crane 5 in the process after they are fixed, unlike the conventional case, they are not affected by the weight balance, and are kept at the same position as when the dies are opened. , Can be matched, and mold closing can be performed. For this reason,
There is no risk of mold accidents such as contact.

In this embodiment, after the mold is closed, it is possible to confirm the operation of the mold by using the push pin cylinder 25. Therefore, as compared with the conventional method in which the crane is temporarily lifted from the reversing machine 6 and mounted on the main body of the injection molding machine to confirm the operation, after the disassembly maintenance, the operation is confirmed on the spot and the trouble is corrected. In this respect as well, the step of returning to the reversing machine 6 again after the defect is found can be omitted,
Good work efficiency.

After the mold is closed, the hydraulic chucks 12 ...
2 is released, and the molds 3 and 4 are lifted off the back plate fixing surfaces 14a and 15a using the crane 5 as shown in FIG. 2 (g), and mounted on the injection molding machine body. Then, molding is performed.

The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific structure is not limited to this embodiment, and the present invention can be applied even if there is a design change or the like within the scope not departing from the gist of the present invention. include.

For example, in the above-mentioned embodiment, the carriages 16 and 17 are moved in the horizontal direction in the drawing by using the sliding hydraulic cylinders 21 and 22 as the horizontal moving means, but the invention is not limited to this. For example, only the carriage 17 is moved using the slide hydraulic cylinder 22, or the carriages 16 and 17 are moved using a rack and pinion mechanism or the like instead of the slide hydraulic cylinders 21 and 22. Also, the back plate fixing surfaces 14a, 15a
Any element may be used as long as it is moved in and out in the horizontal direction.

Further, in the above embodiment, the hydraulic chucks 12 ... And 13 ... Are used as the respective die fixing means so that they can be fixed with one touch, but the invention is not particularly limited to this, and a manual clamper or a bolt can be used. As long as the back plates 7 and 11 of the respective dies 3 and 4 can be fixed such as tightening, any type may be used.

[0044]

As described above, according to the first aspect of the present invention, the back plate of the movable side mold is fixed by the movable side mold fixing means in the mold closed state. In addition, the back plate of the fixed side mold is fixed by the fixed side mold fixing means.

After the mold is opened, the horizontal moving means separates the horizontal distance between the two mold fixing means, and the back plate fixing surface rotating means is used to move the back plates of the respective mold fixing means. Rotate so that the fixed surface faces upward.

Therefore, the movable side mold and the fixed side mold can be disassembled and maintained at the same time, and the work steps can be reduced.

Further, unlike the prior art, it is not necessary to retract the lifted die for avoiding danger, and it is possible to work safely and efficiently.

After the dismantling and maintenance work, both back plate fixing surfaces are rotated in the opposite direction by using the back plate fixing surface rotating means so that the both back plate fixing surfaces face each other.

Then, using the horizontal moving means,
The horizontal distance between the two mold fixing means is reduced.
Both dies do not require the work of suspending them with a crane as in the conventional process. Therefore, without being affected by the weight balance, it matches at the same position as when the mold is opened,
The mold can be closed, and there is no possibility of causing a mold accident such as contact, which is a practically useful effect.

[Brief description of the drawings]

FIG. 1 is a side view illustrating a configuration of a main part of a mold opening device for an injection molding die according to an embodiment of the present invention.

FIG. 2 is a conceptual diagram for explaining main work steps in the mold opening device for the injection molding die of the same embodiment.

FIG. 3 is a conceptual diagram showing a reversing machine of a conventional example and explaining main work steps.

[Explanation of symbols]

 1, 2 Opposing surface 3 Movable mold 4 Fixed mold 7, 11 Back plate Movable mold fixing means 12 Hydraulic chuck 14 Back plate abutting part 14a Back plate fixing surface Fixed mold fixing means 13 Hydraulic chuck 15 Back plate contacting part 15a Back plate fixing surface Horizontal moving means 16,17 Bogie 20 Rails 21,22 Hydraulic cylinder for sliding Back plate fixing surface rotating means 23,24 Reversing hydraulic cylinder

Claims (1)

[Claims] 1. A disassembly maintenance of both molds by separating a movable side mold and a fixed side mold, which form a back plate on the opposite side to the facing surfaces which are connected to face each other, from the connected state. And so on,
Again, a mold opening device for an injection molding die that connects both dies, wherein a movable side die fixing means for fixing the back plate of the movable side die and a back plate of the fixed side die are fixed. The fixed-side mold fixing means is arranged in parallel in the horizontal direction, and horizontal moving means capable of approaching and separating the distance between the two mold fixing means is provided, and further, the back plate fixing surface of each mold fixing means is provided. A mold opening device for an injection molding die, comprising a back plate fixing surface rotating means for rotating so as to face upward.