JPH0733041B2 - Nesting mold and mounting method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a nesting mold and a nesting die mounting method.

(Prior Art) In a plastic injection molding die, there is a demand that a plurality of insert dies for various molded products can be selectively replaced with a base die. There is a technology that was previously filed as Japanese Patent Application No. 62-241139 (Japanese Patent Publication No. 4-22411). According to this technique, the reference planes are located on the outer sides of the reference lines so that the reference planes are along orthogonal reference lines on the attachment surface of the base die, and the reference blocks attached on the die attachment surface are orthogonal to each other. The surface is mounted on the mold mounting surface so as to contact the reference block, and the corners in the diagonal direction with respect to the corner formed by the two surfaces contacting the reference block have a narrow angle with the parting surface. And a metal mold having a nesting die formed on an inclined surface with an obtuse angle and a fixing means provided on the die mounting surface and pressing the inclined surface of the nesting die with a clamp piece to fix the triaxial direction. In order to use a nesting die that shares a base die with a different outer size, both reference blocks and clamp pieces must be of a size corresponding to the size of the nesting die. Can be dealt with by rearranging To have.

(Problems to be Solved by the Invention) However, the mold apparatus has the following problems.

The reference block is clamped and fixed to the base mold by a plurality of bolts.

When the insert molds having different outer sizes are used by sharing the base mold, the reference block must be replaced.

At the time of replacement, if the reference block is left attached to the molding machine, the worker will work through the molding machine depending on the side direction of the mold device attached to the molding machine.
The efficiency of replacement work is not good and there is a problem that it is difficult to assemble the reference block with high accuracy.

Therefore, if the reference block is removed from the molding machine, it is easy to check the assembly accuracy of the reference block, but it takes time to adjust and the setup process of removing and mounting the base mold from the molding machine occurs. There is a problem that the simple and quick exchange, which is the original feature of the child die, cannot be performed.

Therefore, it is an object of the present invention to provide a nesting type molding die in which nesting dies having different sizes can be easily exchanged, and a nesting die mounting method.

(Means for Solving the Problems) The present invention, which has solved the above problems, has the following configuration.

That is, the nesting type molding die is provided with a nesting die for resin molding, a base die for mounting the nesting die, a predetermined position of the base die, and a mounting position of the nesting die. By pressing a right-angled reference means serving as a reference and a pressed portion formed at a corner located diagonally to a corner where two orthogonal surfaces corresponding to the nesting-type reference means intersect. A nesting type molding die comprising a fixing member for fixing the nesting die to the base die, wherein the reference means and / or the nesting die are formed between the reference means and the nesting die. It is characterized in that a spacer is provided to eliminate the gap.

In the above-mentioned nesting type molding die, in order to eliminate the gap between the pressed portion of the nesting die and the fixing member, a second spacer may be provided on the pressed portion and / or the fixing member, The spacer and / or the second spacer may be removable.

On the other hand, the method of attaching the insert die is such that when the insert die is provided and a gap is created between the reference means and the insert die when the insert die is attached to the base die. The insert die is attached to the base die after the spacer is attached to eliminate the gap. Further, a nesting type molding die including a second spacer is provided, and when the nesting die is attached to the base mold, a gap is generated between the pressed portion of the nesting die and the fixing member. In this case, the insert die may be attached to the base die after attaching the second spacer so as to eliminate the gap.

(Operation) The operation will be described.

Even if there is a gap between the insert mold and the fixing mold when attaching the insert mold to the base mold, the gap can be eliminated by inserting the spacer and / or the second spacer, which is simple. It is possible to easily attach various insert molds to a common base mold by various means.

(Examples) Hereinafter, preferred examples of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a front view showing a parting surface on the movable side of a telescopic molding die according to this embodiment, and FIG. 2 is a partially cutaway plan view showing the main part thereof.

In both figures, 10 is a movable type, and the contacting / separating mechanism (not shown) makes contact / separation in the direction of the fixed mold 12.

Reference numeral 14 denotes a movable base, which is a movable 10-type base mold, and is fixed to a movable platen 16.

On the other hand, 18 is a fixed mold base which is a base mold on the fixed mold 12 side, and is fixed to a fixed platen 20.

The movable base 14 is fitted with a movable nesting mold 22 which is a nesting type, and the fixed base 18 is fitted with a fixed nesting mold 24 which is a nesting type. When the movable insert mold 22 and the fixed insert mold 24 are closed (second state), a resin molding cavity (not shown) is formed between the insert molds 22 and 24, and the injection device
Molten resin is injected into the cavity by 26 and molding is performed. After molding, the movable mold 10 moves in the direction of arrow A and opens the mold. At that time, the projecting rod 28 pushes a projecting pin (not shown) to project a molded product (not shown) from the inside of the cavity.

Next, a mechanism for attaching the insert die to the base die will be described with reference to FIG. Here, only the movable die 10 side of the insert die and the base die will be described. Fixed type 12
Since the structure of the side is the same as that of the movable side, the description is omitted here.

Reference numerals 30 and 32 are reference blocks which are reference means, and the inner surface 3
Reference numerals 4 and 36 serve as reference surfaces when the movable insert mold 22 is attached to the movable mold base 14. The reference blocks 30 and 32 are the inner surfaces 34 and 36.
Are fixed to the movable base 14 at predetermined positions by bolts so that they are at right angles to each other. It should be noted that the reference block may be a single member having an L-shape without providing the two reference blocks 30 and 32.

The movable insert die 22 has inclined surfaces 46 corresponding to the reference blocks 30 and 32, which are the pressed portions at the corners 42 and diagonal corners 44 of the two surfaces 38 and 40 which are orthogonal to each other. The inclined surface 46 is formed in the corner portion 44 because the clamp piece 50 movable along the inclined groove 48 formed in the movable base 14 presses the inclined surface 46, and the tightening tool includes a bolt or the like. This is because the movable insert mold 22 is fixed to the movable mold base 14 by fixing the clamp piece 52 with 52. The clamp piece 50 and the fastener 52 constitute a fixing member.

54 and 56 are spacers, which can be mounted and fixed by the fixing members such as the reference blocks 30 and 32 and the clamp pieces 50 if the movable insert die 22 has a size of 22a shown by the alternate long and short dash line. When the insert mold 22 is small, a gap is created between the center blocks and the reference blocks 30 and 32. Therefore, the spacer 5 is provided between the inner surfaces 34, 36 of the reference blocks 30, 32 and the two surfaces 38, 40 of the movable insert mold 22 corresponding to the inner surfaces 34, 36.
By inserting 4 and 56, the gap between the reference blocks 30 and 32 and the movable insert mold 22 is eliminated. Spacers 54, 56
As shown in FIG. 3, the spacer 54 is detachably fitted into the dovetail groove 58 provided on the side surface of the movable insert die 22. The spacer 54 shown in FIG. 4 is fixed to the side surface of the movable insert mold 22 through a bolt 60, and the bolt 60 is removed when the spacer 54 is attached or detached. 3 and 4, the spacer 54 is provided on the movable insert mold 22, but the spacer 54 may be provided on the reference block 30 side. The example of FIG. 5 is an example in which the spacer 54 is detachably fitted in the dovetail groove 62 formed in the reference block 30, and the example of FIG.
This is an example of fixing with a bolt 64.

Although not shown, the spacer may be formed to have a half thickness and provided on both the insert mold and the reference block. In FIG. 1, reference numeral 66 denotes a second spacer, which is used when the movable insert mold 22 has a small size and the clamp piece 50 cannot reach the inclined surface 46.
It is inserted between 46 and the clamp piece 50, and is provided to eliminate the gap between them. Therefore, if the stroke of the clamp piece 50 is sufficient and the inclined surface 46 can be pressed by the clamp piece 50, the second spacer 66 is unnecessary. Second spacer
66 is a dovetail groove formed in the clamp piece 50 as shown in FIG.
It may be detachably fitted to 68, or may be detachably fitted to a dovetail groove 70 formed in the movable insert mold 22 as shown in FIG. Further, although not shown, the second spacer may be fixed to the clamp piece 50 or the insert type through a bolt, or the second spacer may be formed to have a half thickness so that both the clamp piece and the insert type are formed. It may be fixed to.

When using the telescoping mold configured in this way,
If the movable insert mold 22 has a predetermined size (the size shown by the chain line 22a in FIG. 1), it is not necessary to mount the spacers 54 and 56 and the second spacer 66. Further, if either the vertical or horizontal dimension of the movable insert mold 22 is the predetermined size, one of the spacers 54 or 56 is not necessary, but if the movable insert mold 22 is a small size, the spacer 54, By attaching 56 to the reference blocks 30, 32 and / or the movable insert mold 22, the reference block 30,
The gap between the 32 and the insert die 22 is eliminated, and if there is a gap between the clamp piece 50 and the inclined surface 46, the second spacer is formed.
66 to the clamp piece 50 and / or the inclined surface of the movable insert mold 22
The movable insert die 22 is attached to the movable die base 14 after fixing the movable insert die 22 to the movable die base 14 by fixing the movable insert die 22 to the movable die base 14 by fixing the movable insert die 22 to the movable die base 14 by fixing it to the movable die base 14. Of course, the fixed insert type 24 of the fixed type 12 and the fixed type base 18 are also 2
Two spacers 72 (one not shown) for two reference blocks
The second spacer 76 may be interposed between the clamp piece 78 and the inclined surface 80 of the fixed insert mold 24 between 74 (one is not shown) and the fixed insert mold 24.

Although various preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. is there.

(Effect of the Invention) By using the insert molding die and the insert die attaching method according to the present invention, a small insert die can be easily attached to the base die by a simple method of only attaching the spacer. Becomes This also improved the problem of efficiency and precision in the work of replacing the reference block, and made it possible to efficiently select a nesting type that matches the product size. Can be exchanged. Furthermore, the versatility of the base mold is increased, and it is economically effective.

[Brief description of drawings]

FIG. 1 is a front view showing a parting surface on a movable side of a telescoping mold according to the present invention, FIG. 2 is a partially cutaway plan view showing a main part thereof, and FIGS. 3 to 6 are spacers. And FIG. 7 and FIG. 8 are partial cross-sectional views showing a mounting example of the second spacer. 10 …… Movable type, 12 …… Fixed type, 14 …… Movable type base, 18
...... Fixed type base, 22 ...... Movable insert type, 24 ...... Fixed insert type, 30, 32 ...... Reference block, 50 ...... Clamp piece, 52 ...
... Fasteners, 54, 56 ... Spacers, 66 ... Second spacers, 72 ... Spacers, 74 ... Reference blocks, 76 ... Second
Spacer, 78 …… Clamp piece, 80 …… Inclined surface.

Claims (5)

[Claims] 1. An insert mold for resin molding, a base mold for mounting the insert mold, and a right-angled mold provided at a predetermined position of the base mold and serving as a reference for a mounting position of the insert mold. The nesting type base is formed by pressing the reference means and a pressed portion formed at a corner located diagonally to a corner where two orthogonal surfaces corresponding to the reference means of the nesting type intersect. In a nesting type molding die having a fixing member for fixing to a die, in order to eliminate a gap between the reference means and the nesting die in the reference means and / or the nesting die. The insertable molding die is characterized in that the spacer is provided. 2. A second spacer is provided on the pressed portion and / or the fixing member in order to eliminate a gap between the insertion type pressed portion and the fixing member.
Nesting mold described. 3. The insertable molding die according to claim 1, wherein the spacer and / or the second spacer is detachably provided. 4. The insert type molding die according to claim 1, wherein when a gap is created between the reference means and the insert die when the insert die is attached to the base die, A nesting die mounting method characterized in that the nesting die is attached to a base die after the spacer is attached to eliminate a gap. 5. The insert-type molding die according to claim 2 or 3 is provided, and when the insert die is attached to the base die, it is between a pressed portion of the insert die and the fixing member. When a gap is created, the insert mold is attached to the base mold after attaching the second spacer so as to eliminate the gap.