JPS60245525A - Molding die - Google Patents

Abstract

PURPOSE:To replace a die core very easily by a method wherein a molding die is a polygon with a compression surface to compress a die core into the specified corner section in a die cavity to set the die core, a fixing tool is made reciprocative freely toward the die core and a tool to connect a thermal medium circuit in the die core is provided in the fixing tool. CONSTITUTION:The fixing tool 3 to compress and fix the die core into the cavity 1b is made reciprocative freely by the hydraulic cylinder 3a set to the molding die body 1 turning the open section of the molding die body 1 toward the die core 2. The fixing tool 3 is retracted downward, the die core 2 is inserted into the concave section 1b so that the compression surface 2a is located down on the right side, then, when the fixing tool 3 is elevated by the hydraulic cylinder 3a the compression section 3b of the fixing tool 3 compresses the compression surface 2a of the die insert 2, the die core 2 is compressed and fixed to the left, upper corner of the concave section 1b, the fixing tool 3 and the connecting tools 3a and 2c are connected with each other, the thermal medium is circulated in the temperature adjusting circuit 2b to adjust the temperature of the die core 2 only.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a molding die, and more particularly, the present invention relates to a mold for molding, and more particularly, it is capable of fixing an insert in a fixed position with high precision, easily and reliably, and is capable of fixing the insert and controlling heat release inside the insert. The present invention relates to a molding die that can be connected to a circuit at the same time and that allows automatic replacement of inserts.

In recent years, with the diversification of the uses of molded products and the reduction in the amount of molded product inventory, there has been a need for high-variety, low-volume production. The aim is to shorten the time, reduce mold costs, and use mold stock space efficiently by downsizing the mold.

In the conventional molding die in which only the insert is replaced, as shown in JP-A-54-137433, the insert and the insert insertion recess of the mold body are square-shaped, and the mold body is replaced with a rectangular shape. Some bolts are inserted into the insert and fixed to the insert by pulling the insert to a predetermined corner of the insert insertion recess.

In such a molding die, the insert is fixed with its two surfaces in contact with the mold body, so the positioning accuracy is improved, and the cavities, runners, etc. formed in the insert are fixed with the two surfaces as the reference plane. It has the advantage of being easy to process.

However, in this mold, the insert is positioned and fixed with bolts, and when replacing the insert, the bolt must be turned and removed each time.As mentioned above, inserts must be replaced frequently in high-mix, low-volume production. G1 has the drawback that it is extremely troublesome when it is done in advance, and it is also difficult to automatically perform the nest exchange.

In addition, conventionally, the temperature control circuit was installed inside the insert because the insert was small and had a small heat capacity, so it could follow the temperature of the mold body in a relatively short time. If a circuit is provided, it is not generally done because the temperature control exhaust circuit must be connected each time a nested conversion is performed.

However, as mentioned above, inserts have to be replaced frequently, and when changing the temperature depending on the shape and material of the molded product, the conventional method of changing the temperature of the mold body is time consuming and inconvenient. Therefore, there is a need to directly control the temperature of the insert, and it is desired to develop a mold that can easily connect a temperature controller to the temperature control circuit provided inside the insert. Ta.

The present invention has been made in view of the above circumstances, and its purpose is to accurately fix the insert in a fixed position.
Moreover, it is possible to provide a molding die which can be easily and reliably fixed, and which can simultaneously perform the fixing of the insert and the connection of the temperature control supply/exhaust circuit to the thermal open circuit inside the insert. A mold body is formed with a polygonal insert insertion recess, a cavity is formed, a polygonal insert is inserted into the insert insertion recess, and the insert is inserted into a predetermined corner of the insert insertion recess. and a fixture for positioning and fixing the insert by pressing it against the insert and bringing two of the outer wall surfaces of the insert into contact with two of the inner wall surfaces of the insert insertion recess. A pressing surface for pressing the insert into a predetermined corner of the insert insertion recess is formed on the outer wall surface of the insert opposite to the corner, and a temperature control circuit is provided inside the insert. The exit of the circuit is set on the outer wall surface of the insert, and the inner wall surface of the four insert insert parts facing the pressing surface and the input/output eye placement surface of the insert is removed, and the pressing surface that comes into contact with the pressing surface of the insert is removed. The fixing device is provided with a connecting portion for connecting the heat medium supply/discharge port to the inlet/outlet, and the fixing device is configured to be able to freely move forward and backward toward the insert from the open portion of the mold body, and It was around this time that the fixing of the heating medium and the connection of the heat medium supply and discharge to the thermal open circuit inside the insert were performed at the same time.

Hereinafter, preferred embodiments of the present invention will be described in detail based on the accompanying drawings.

FIG. 1 is a plan view showing the mating surface of one of the split molds, and the other mold is constructed in the same manner.

2 is the mold body, and 1a is the guide hole.

The parting surface of the mold body 1 is formed with four substantially square parts 1b into which inserts to be described later are inserted.

Also, among the inner walls of this recessed portion 1b, the lower inner wall in FIG. serves as a reference surface when fixing the nest.

Reference numeral 2 denotes a nest, which is formed into a substantially square shape that is slightly smaller than the recess 1b, and has a cutout at the lower right corner of FIG. 1 to press the insert 2 against the reference surface of the recess 1b. A pressing surface 2a is formed for this purpose. Moreover, this pressing surface 2a is an inclined surface that spreads outward from the parting surface toward the bottom surface, and prevents the insert 2 from lifting off from the parting surface when pressing this pressing surface 2a.

Note that this pressing surface 2a is preferably formed so that the bisectors of the interior angle formed by the reference surface intersect at right angles, but this is not necessarily the case.1. It is fine as long as it is on the side you are facing.

Inside the insert 2, there is a temperature control circuit 2 which is a flow path for the heat medium.
b is formed, and a connecting tool 2C for supplying and discharging a heat medium to the temperature control circuit 2b is provided protruding from the lower side surface of the insert 2 in FIG.

3 is a fixture for pressing and fixing the insert 2 into the recess 1b, and is a hydraulic cylinder 3 attached to the mold body 1.
a allows the open portion of the mold body 1 to move forward and backward toward the insert 2. On the surface of the fixture 3 facing the insert 2, there is a pressing part 3b that is located corresponding to the pressing surface 2a and comes into contact with the pressing surface 2a, and a heating section provided externally that is located corresponding to the connecting tool 2C. A connecting tool 3c for connecting a regulating machine (not shown) is provided.

Reference numeral 4 denotes a heat insulating layer made of ashest or the like, and as shown in FIG. 2, it is provided on each mold body 1 of the split mold. This heat insulation N4 is formed in the mold body 1 by a block 4b fixed to the mold body 1 with a pole 4a so that the insert 2 does not form a direct groove. Note that the four parts 1b are formed by the inner wall surface of the block 4b.

Therefore, the fixing tool 3 is moved back downward, and the recess 1b
Insert the insert 2 into the inside so that its pressing surface 2a is at the lower right position, and then press the fixture 3 with the hydraulic cylinder 1 under 3a.
When raised, the pressing part 3b of the fixture 3 presses the pressing surface 2a of the insert 2, pressing and fixing the insert 2 to the upper left corner of the recess 1b, and the connecting tool between the fixture 3 and the insert 2 3c and 2
c is connected, the heat medium circulates in the temperature control circuit 2b, and the temperature of only the insert 2 is controlled.

When the insert, which is extremely easy to fix, is removed from the mold body and stored or pre-temperature controlled,
It is preferable to connect the movable side insert and the fixed side insert to each other.

3 and 4 show a mechanism for connecting the movable side insert and the fixed side insert, and to explain this, 10 is the movable side insert, 11 is the fixed side insert, respectively. A temperature control circuit is disposed inside, and connecting portions 10a and 11a for connecting a heat medium circuit such as a temperature control device are provided protruding from the lower side of each. Further, on the side wall surfaces of the movable side insert 10 and the fixed side insert 11, a pressing surface 10b and a pressure surface 10b for pressing and fixing each insert to a predetermined corner of the insert insertion recess formed in the respective mold body. llb is formed.

Reference numeral 12 denotes a guide pin, the base end of which is fixed to the stationary insert 11, the tip protrudes from the parting surface, and is inserted into the guide hole 10C drilled in the movable insert 10 during mold clamping, and is re-inserted. Guide the relative position of the nest to be constant.

Of the guide pins 12, the guide pin 12a located near the pressing surface Job has a narrow diameter portion 12 in the middle of its circumferential surface.
b is formed.

Reference numeral 13 denotes a plate-shaped stopper, which is positioned corresponding to the narrow diameter portion 12b during mold clamping by inserting the guide pin 12a through a through hole 13a bored with an inner diameter slightly larger than the outer diameter of the guide pin 12a. protrudes from the pressing surface tob, and its base end is biased by the compression knife 14 in the direction of protrusion from the pressing surface 10b, and is disposed on the movable insert 10. Note that when the tip of the stopper 13 is pushed against the bias of the compression spring 14 to the same level as the pressing surface 10b, the center of the through hole 13a coincides with the axis of the guide pin 12a, and the center of the through hole 13a coincides with the axis of the guide pin 12a. The strike collar 13 can be inserted freely.

Therefore, in order to attach the re-inserted member connected by the stopper 13 and the guide pin 12a to the mold body, first,
The stationary insert 11 is inserted into the insert insertion recess of the stationary mold body, and the fixture 3 is raised from below to fix the re-insert to the stationary mold body.

When the movable mold body is moved to the mold clamping position, the movable insert 10 is positioned in the insert insertion recess of the movable mold body. After that, by raising the fixture 3, the movable side insert is pressed against the pressing surface 10b by the pressing part 3b of the fixture 3.
When the pressing part 3b is pressed and fixed, the pressing part 3b is simultaneously pressed against the stopper 1.
3 will be pushed in, and the connection of the re-entrant will be released.

In addition, in order to remove the re-inserted member from the mold body, the operations may be performed in the reverse order as described above.

Next, FIGS. 5 and 6 show a mold in which the re-inserted member connected as described above is automatically removed from or attached to the mold body, and this is explained below. To explain, reference numeral 15 denotes handling holes bored in two vertically vertical wall surfaces on both sides of the movable insert 10.

This handling hole 15 is provided in the insert on which the stopper 13 is disposed, and as described above, the insert on which the stopper 13 is disposed is connected to the mold body. This is suitable because it is exposed from the other mold body during installation.

16 is the arm of the mold exchange robot, and the movable side insert 1
It consists of a finger 168 that moves forward and backward toward the vertical wall surface of 0, and a claw 16b that protrudes from the inner surface of this finger 168 and fits into the handling hole 15. The mold changing robot (not shown) moves the arm 16 back and forth with respect to the molding machine.

It moves left and right, up and down, and moves the connected re-entrant between the mold stocker outside the molding machine and the mold body of the molding machine.

In this way, according to the present invention, the insert is formed into a polygonal shape having a pressing surface for pressing it into a predetermined corner of the insert insertion recess of the mold body, and the insert is pressed by pressing this pressing surface. A fixing device for fixing the insert is made to move forward and backward toward the insert, and a connecting device is provided on the fixing device for connecting a heat medium circuit such as an external temperature controller to a temperature control circuit inside the insert. Therefore, not only is it extremely easy to replace the insert, but the positioning accuracy of the insert is improved, and it is also possible to fix the insert and connect the external temperature control heat medium circuit to the insert temperature control circuit at the same time. This has the great effect of making it possible to automatically replace the insert.

Although the present invention has been variously explained above with reference to preferred embodiments, the present invention is not limited to these embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. That's true.

[Brief explanation of drawings]

Fig. 1 is a plan view showing the molding surface of the molding die according to the present invention, Fig. 2 is a sectional view taken along line A-A, and Fig. 3 is a rear view showing a state in which the split mold re-insertion member is connected. Figure 4 is part B.
-B sectional view, Figure 5 is a side view of the insert with a handling hole for lifting the connected re-entrant, Figure 6 is the 'c, -c sectional view of Figure 5 and the plane of the handling arm. It is a diagram. 1...Mold body, la...Guide bar. 1b... recess, lc... upper inner wall, Id...
Left inner wall, 2... Insert, 2a... Pressing surface, 2b
...Temperature control circuit, 2c...Connection tool, 3...Fixing tool, 3a...Hydraulic cylinder, 3b...Pushing part,
3c... Connection tool. 4... Heat insulation layer, 4a... Bolt, 4b... Block, 10... Movable side insert, 10a... Connection part,
10b...pressing surface, 10c...guide hole, 11...
・Fixed side insert. 11a... Connection portion, 11b... Pressing surface. 12.12a...Guide pin, 12''b...Small diameter part, 13...S'r soba, 13a...Through hole, 14.
... Compression spring, 15 ... Handling hole, 16 ...
Arm, 16a...finger, 16b...claw. Patent Applicant Nichiyo Resin Kogyo Co., Ltd. Representative Yoshiharu Shima Agent (7762) Patent Attorney Figure 3 I]-m-1 Akebono Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] 1. A mold body in which a polygonal insert insertion recess is formed;
A polygonal insert is inserted into the insert insertion recess, and the insert is pressed to a predetermined corner of the insert insertion recess, and two of the outer wall surfaces of the insert are inserted into the cavity. In a molding die consisting of a fixture for positioning and fixing the insert by abutting against the two inner walls of the inner wall surface of the insert recess, the insert is for pressing the insert into the predetermined corners of the four insert inserting parts. A pressing surface is formed on the outer wall surface of the insert opposite to the corner, a temperature control circuit is provided inside the insert, and an exit of this temperature control circuit is provided on the outer wall surface of the insert. The inner wall surface of the insert insertion recess facing the pressing surface and the input/output eye placement surface is removed, and a connecting portion connects the pressing portion that comes into contact with the pressing surface of the insert and the heating medium supply/discharge port to the input/outlet. is provided on the fixture, and the fixture is configured to be able to move forward and backward toward the insert from the open portion of the mold body, and to fix the insert and connect the heat medium supply and discharge to the thermal open circuit inside the insert. A mold that performs both at the same time.