JPH0723225Y2 - Mold for molding - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is a molding comprising a nesting die in which a cavity is formed according to a molded product, and a die holder for detachably holding the nesting die. The present invention relates to a molding die, and more particularly to a molding die that can be easily dealt with even when the shape of the ejector means of the insert die and the ejector method are changed according to the type of molding.

[Conventional technology]

In recent years, with the progress of small-lot production of many kinds of products, the number of times of mold replacement for a molding machine is increasing. At the same time, the number of molded products produced from one mold has decreased, and the mold manufacturing cost for each molded product has increased.

Among them, as one method to further reduce the die manufacturing cost and shorten the die manufacturing time, a molding die is attached to a molding machine, and a cavity part is formed according to the molding product. And a mold in which the mold is detachably attached to the mold holder have been devised and partially put into practical use.

Conventionally, this type of molding die has a fixed side holder attached to a fixed side platen of a molding machine and a movable side platen of the molding machine, as disclosed in, for example, Japanese Patent Laid-Open No. 1-283119. And a movable holder attached to the. More specifically, the fixed-side holder excludes the fixed-side mounting plate attached to the movable-side platen, the fixed-side template for positioning and holding the insert die, and the runner from the molded product depending on the type of molding. It has a runner stripper plate. In addition, the movable-side holder is formed of a movable-side mounting plate mounted on the movable-side platen, a spacer block, and a movable-side template for positioning and holding the insert die.

The insert die is mounted in the insert insertion recesses formed in the fixed holder and the movable holder.

On the other hand, the insert mold has a mounting means for the mold holder, a mold plate forming a cavity, and an ejector means for taking out a molded product molded in the cavity. As the insert type ejector means, ejector pins and ejector sleeves for ejecting molded products, ejector plates holding these, bolts for holding the ejector plate in communication with the insert mold, ejectors after ejecting molded products It consists of a return pin and a spring that holds the plate in its original position.

[Problems to be solved by the device]

By the way, in this type of molding die, the shape of the cavity of the insert mold differs depending on the shape of the molded product, and the ejector means of the insert mold also differs depending on the shape of the molded product.

That is, if the shape of the molded product is different, the ejector pin placement position, the amount of movement required to eject the molded product, or the core pin that forms a part of the cavity and the ejector sleeve that is fitted to this There are various ejector means, such as those for taking out goods.

However, in the molding die disclosed in, for example, the specification of JP-A 1-283119, the ejector plate is brought into contact with or engaged with the movable side mounting plate of the movable side holder,
When the ejector plate is positioned and the ejector plate is returned, the ejector plate is always in the same position, and the stroke amount of the ejector plate is always the same and becomes the maximum. Therefore, even if the stroke amount of the ejector plate may be short, the stroke amount cannot be changed, so that the molding cycle cannot be shortened,
Further, since the ejector pin is long, there is a problem that an ejector pin which is unnecessarily expensive must be used.

Further, it is possible to change the stroke amount of the ejector plate by floating the ejector plate from the movable side mounting plate of the movable side holder using a bolt that holds the ejector plate in a telescopic type and changing the length of the bolt. However, since the tip of the ejector pin faces the cavity and constitutes a part of the outer shape of the molded product, the ejector plate that holds the ejector pin must also be positioned with high accuracy during mold clamping, and the ejector pin must be positioned with high accuracy. Accurate positioning is difficult.

Further, when the ejector sleeve is used as the ejector means, the core pin that constitutes a part of the cavity and slidably fits with the ejector sleeve is planted in the core pin plate located outside the ejector plate. Since it constitutes a part of the cavity, the core pin plate must be pressed or fixed to the movable side mounting plate and positioned with high precision.

However, the conventional die holder does not have a means for pressing or fixing the core pin plate to the movable side mounting plate, and it is not possible to cope with this type of molding, or even if it is possible, it is possible to finish the molded product with high accuracy. There was a problem that I could not.

The present invention has been made in view of the above-mentioned problems, and it is possible to change the stroke amount of the insert-type ejector plate, and at the same time, to perform highly accurate positioning when the ejector plate is returned to the mold holder. An object of the present invention is to provide a molding die having In addition, the mold holder is a nesting mold, part of the cavity of the nesting mold is formed by the core pin, and it can be used when ejecting a molded product with an ejector sleeve that slidably fits with the core pin. The purpose is to provide.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the structure of the present invention has a mold holder having a movable side holder and a fixed side holder attached to a platen of a molding machine, and a mold holder having a nest insertion recess for each holder, and a molded product. A molding die having one or a plurality of insert dies each having a corresponding cavity and ejector means, and the insert dies are removably attached to the respective insert insertion recesses of the die holder. The movable holder includes a movable mold plate in which a nest insertion recess is formed, and a pair of spacer blocks located between the movable mold plate and the movable mounting plate and facing each other. A groove portion formed between the spacer block and the movable side mounting plate, an adapter plate having both ends attached to the groove portion, and a clamp means arranged in the spacer block for fixing the adapter plate to the movable side mounting plate. Having at least one in which the ejector plate insert mold forms part of the insert mold ejector means when mounted to the movable side holder, characterized in that it abuts against the adapter plate.

Further, as another configuration, it has a movable side holder and a fixed side holder that are attached to the platen of the molding machine, and each holder has a nest insertion recess that opens at least in the mold opening / closing direction and in a direction orthogonal to the mold opening / closing direction. A mold holder, and one or a plurality of insert dies each having a cavity and an ejector means corresponding to a molded product are formed. In a molding die in which a nesting die is detachably mounted, the nesting die includes, in addition to a mold plate in which a cavity is formed, an ejector plate provided with a cylindrical ejector sleeve for taking out a molded product. A core pin plate in which a tip part constitutes a part of a cavity and a core pin slidably fitted in the ejector sleeve is disposed. The movable side holder is disposed between the movable side template having a nest insertion recess formed therein, the movable side mounting plate mounted on the molding machine, and between the movable side template and the movable side mounting plate so as to face each other. A pair of spacer blocks to be installed, and formed between the spacer blocks and the movable side mounting plate so as to extend in the insertion direction of the nest type, and when the nest type is mounted on the movable side holder, A groove in which the core pin plate is mounted,
Clamping means may be provided in the spacer block for fixing the core pin plate to the movable side mounting plate.

[Action]

With the above structure, the molding die of the present invention is
Since the adapter plate can be replaced, the stroke amount of the insertable ejector plate can be adjusted to an optimum amount. Also remove the adapter plate,
Alternatively, when the molded product is taken out by the ejector sleeve, the core pin plate to which the core pin is attached can be fixed to the movable holder.

〔Example〕

 Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an example of the molding die of the present invention. The basic structure of the molding die is the same as that of the molding die disclosed in the specification of JP-A 1-283119.

The molding die is roughly divided into a die holder and a nest die. Specifically, the mold holder is composed of a fixed side holder A mounted on the fixed side platen of the molding machine and a movable side holder B mounted on the movable side platen of the molding machine.

The fixed-side holder A is composed of a fixed-side mounting plate 1 mounted on the molding machine, a runner stripper plate 2, and fixed-side mold plates 3 and 4. Further, the fixed-side mold plates 3 and 4 are formed with a mold insertion opening concave portion a in the mold opening / closing direction and in a direction orthogonal to the mold opening / closing direction, and are configured to be fitted with a mold insert described later.

On the other hand, the movable side holder B includes a movable side mold plate 5, a pair of spacer blocks 6, and a movable side mold mounting plate 7.
Then, the mold plates are integrally fixed to each other, and the movable mold mounting plate 7 is mounted on the movable platen of the molding machine, whereby the movable holder B is mounted on the molding machine. Further, the movable holder B has a mold insertion opening concave portion b formed in the mold opening / closing direction and a direction orthogonal to the mold opening / closing direction, and is configured to be fitted with a mold insert described later. Furthermore, in the movable holder B, a groove 6a is formed between the spacer block 6 and the movable die mounting plate 7 along the insertion direction of the insert die. Further, the spacer block 6 is formed with a clamp means E which is configured to be retractable in the groove 6a, and the clamp means E may be an adapter plate 20 with which a nested ejector plate abuts or a nested type having a core pin. If
The core pin plate on which the core pin is mounted is pressed and fixed to the movable side mounting plate 7.

In addition, the mold holder includes means such as a guide post for guiding the opening and closing of the fixed holder A and the movable holder B, the opening and closing order of each mold plate of the fixed holder A, and the stroke when opening the mold. Means or the like for regulating the amount are provided. Further, although not shown, the fixed-side holder A and the movable-side holder B are respectively provided with means for positioning and fixing the insert type.

Next, the nesting type will be described. The insert mold includes a fixed insert mold C that is installed in the insert insertion recess a of the fixed holder A and a movable insert mold D that is installed in the insert insertion recess b of the movable holder B. ing.

The fixed insert mold C is composed of a insert mold mounting plate 11 that is positioned and fixed to the fixed holder A and a insert mold plate 12 formed integrally with the insert mount plate 11. On the other hand, movable side insert type D
Is a mold that is formed in correspondence with the insert mold plate 12 and in which a cavity corresponding to a molded product is formed, and is integrally formed with the insert mold plate 13. It has a nesting type mounting plate 14 which is positioned and fixed to. In addition, the movable-side insert die D has ejector plates 15 and 16 as ejector means for molded products, a return pin 17 for returning the ejector plates 15 and 16, an ejector pin 18 for ejecting the molded product, and the like. ing. Also ejector plate 1
5 and 16 are integrally formed with screws and the like, and in the nesting type single body, they are integrally held with the nesting type mounting plate 14 by plastic bolts and the like, and when mounted on the movable side holder B, the adapter plate It is configured to abut 20.

Further, the nesting die is provided with guide means for guiding the die opening / closing of the movable-side nesting die C and the fixed-side nesting die D, means for regulating the die opening / closing order, and the like.

Next, the clamp means E formed on the spacer block 6 will be described.

2 (a) and 2 (b) are side sectional views of the clamp means E as seen from a direction orthogonal to the insert direction of the insert die, and FIG. 2 (a) shows the clamp means E in a non-operating state. 2 (b) is a diagram showing the time when the clamp means E is in the operating state.

Inside the spacer block 6, which is horizontally long in the insertion direction,
Grooves formed between the spacer block 6 and the movable side mounting plate 7
A storage portion 6b is formed which opens to 6a. The clamp means E is disposed in the storage portion 6b, and extends in a direction orthogonal to the insertion direction of the insert mold with a pressing member 21 having a substantially rectangular shape and a D-shaped cross section, and the pressing member 21 is provided. A rotation shaft 22 for rotatably holding the housing, and the storage portion from the same direction as the insertion direction of the insert mold.
A bolt 23 that is disposed so as to penetrate through the inside of 6b and is screwed to the rotating shaft 22.
And a space ring 24 for return.

As shown in FIG. 2 (a), the clamp means E is a bolt 23
When the pressing member 21 is loose, the abutting portion 21b of the pressing member 21 is in contact with the adapter plate 20 or is slightly separated. In this state, the adapter plate 20 can be easily attached and detached.

On the other hand, as shown in FIG. 2 (b), when the bolt 23 is tightened, the pressing member 21 is gradually drawn, and the engaging recess 21a of the pressing member 21 is formed in the storage portion 6b. It abuts on the compound convex portion 6c. Then, the pressing member 21 starts to rotate around the engaging convex portion 6c as the rotation center. At this time, the contact portion 21b is eccentric with respect to the engaging recess 21a, the eccentric amount increases as the bolt 23 is tightened, the adapter plate 20 is pressed by the contact portion 21b, the movable side mounting plate. It can be fixed to 7.

As described above, the adapter plate 20 can be easily attached and detached by the clamp means E, while the adapter plate 20 is in contact with the ejector plate 16, so that the adapter plate 20 regulates the returning positions of the ejector plates 15 and 16. be able to.

Therefore, as shown in FIG. 3, when the thickness of the adapter plate 31 is increased, the return positions of the ejector plates 15 and 16 are closer to the nesting mold plate 14 by that amount, so that the stroke amount of the ejector plates 15 and 16 is reduced. can do. On the contrary, by removing the adapter plate 31 or using an adapter plate in which the contact portion of the ejector plate 16 is drilled, the return position of the ejector platens 15, 16 is on the movable side mounting plate 7 or in the vicinity thereof. As a result, the stroke amount of the ejector plates 15 and 16 can be increased. Then, the return positions of the ejector plates 15 and 16 can be accurately positioned by the adapter plates 20 and 31 or the movable side mounting plate 7.

Further, FIG. 4 shows another example of the molding die, and is a partially cutaway sectional view seen from the insertion direction of the insert die. The ejection of the molded product is performed by the ejector sleeve.

The ejector sleeve 43 is mounted between the ejector plates 15 and 16, and is configured to move in conjunction with the ejector plates 15 and 16. On the other hand, the core pin 42 whose tip portion forms a part of the cavity is mounted on the core pin plates 40 and 41. The core pin 42 is slidably engaged with the inner circumference of the ejector sleeve 43.

Although not shown, the ejector plates 15 and 16 contact the ejector rod of the molding machine when the mold is opened, move toward the insert mold mounting plate 14, and eject the molded product F by the ejector sleeve 43. .

The tip of the core pin 42 forms a part of the cavity and must be positioned at an accurate position in order to produce a molded product with high accuracy. Therefore, the core pin 42 can be accurately positioned by inserting the core pin plates 40 and 41 into the groove 6a of the spacer block 6 and pressing and fixing them to the movable side mounting plate 7 by the clamp means E. Further, the ejector plates 15 and 16 can accurately position their return positions by contacting the core pin plates 40 and 41.

In the previous embodiment, the insert insertion recess of the mold holder is shown as an example in which the mold opening / closing direction and the direction orthogonal to the mold opening / closing direction are opened. Applicable to molding dies of the type in which the insertion recess is opened only in the mold opening / closing direction and the insert mold is attached / detached from the mold opening / closing direction, if there is enough space to install the adapter plate in the direction orthogonal to the mold opening / closing direction. You can

The clamping means for the adapter plate or the core pin plate is, for example, provided with an inclined surface on the spacer block, and a wedge-shaped pressing piece is brought into contact with the inclined surface to obtain a pressing force, in addition to the above-mentioned embodiment. Various modifications can be made as long as each plate can be pressed toward the movable side mounting plate.

〔effect〕

As described above, the molding die of the present invention is a molding die in which the insert die is detachably attached to the mold holder including the fixed side holder and the movable side holder. A movable side mold plate in which a nest insertion recess is formed, a movable side mount plate attached to a molding machine, and a pair disposed between the movable side mold plate and the movable side mold plate and facing each other. Spacer blocks, a groove formed between each spacer block and the movable side mounting plate, an adapter plate with both ends attached to the groove, and a spacer block disposed in the spacer block. At least clamping means for fixing is provided, and when the insert die is mounted on the movable side holder, an ejector plate forming a part of the insert ejector means comes into contact with the adapter plate. Also It is. In addition, as another configuration, in addition to the template in which the cavity is formed, the insert die has an ejector plate on which a cylindrical ejector sleeve for taking out a molded product is arranged, and a tip portion constitutes a part of the cavity. While having at least a core pin plate in which a core pin slidably fitted in the ejector sleeve is disposed, the movable side holder is mounted on a molding machine and a movable side template in which a nest insertion recess is formed. Movable side mounting plate, a pair of spacer blocks located between the movable side mold plate and the movable side mounting plate and facing each other, and a nesting type insertion direction between each spacer block and the movable side mounting plate. And is formed in the spacer block and the groove portion into which the insert type core pin plate is attached when the insert type is attached to the movable side holder. Serial and has a clamping means for fixing to the movable side mounting plate.

Therefore, the return position of the ejector plate can be changed by sequentially replacing and using the adapter plates with different thicknesses of the contact surface of the ejector plate, and by freely attaching or detaching the adapter plate, the stroke amount of the ejector plate can be freely adjusted. Can be adjusted. Further, the return position of the ejector plate can be accurately positioned by the adapter plate and the movable side mounting plate.

Further, even when the molded product is taken out by the ejector sleeve, the core pin plate on which the core pin is mounted is pressed and fixed to the movable side mounting plate by the clamp means,
The core pin forming a part of the cavity can be accurately positioned. Further, the ejector plate can accurately position its return position by contacting the core pin plate.

[Brief description of drawings]

FIG. 1 is a view showing a molding die of the present invention.
FIGS. (A) and (b) are views showing a clamping means of a molding die of the present invention, and FIGS. 3 and 4 are views showing an example of mounting another insert die. A: Fixed side holder, B: Movable side holder C: Fixed side insert type, D: Movable side insert type E ... Clamping means, 6 ... Spacer block 6a ... Grooves 15, 16 ... Ejector plate 40, 41 …… Core pin plate 42 …… Core pin, 43 …… Ejector sleeve

Claims (2)

[Scope of utility model registration request] 1. A mold holder having a movable side holder and a fixed side holder attached to a platen of a molding machine, each holder having a recess for inserting a nest, a cavity and an ejector means corresponding to a molded product are formed. In a molding die having one or a plurality of insert dies, the insert dies are detachably attached to the respective insert insertion recesses of the die holder, the movable holder is A movable side mold plate having an insertion recess formed therein, a movable side mount plate mounted on the molding machine, and a pair of spacer blocks located between the movable side mold plate and the movable side mount plate and arranged to face each other. , A groove portion formed between each spacer block and the movable side mounting plate, an adapter plate having both ends attached to the groove portion, and a clamp arranged in the spacer block for fixing the adapter plate to the movable side mounting plate. A molding metal having at least a step and characterized in that, when the insert mold is mounted on the movable side holder, an ejector plate constituting a part of the inserter ejector means abuts on the adapter plate. Type. 2. A movable-side holder and a fixed-side holder that are attached to a platen of a molding machine, and each of the holders has a nest insertion concave portion that opens at least in a mold opening / closing direction and a direction orthogonal to the mold opening / closing direction. A mold holder, and one or a plurality of insert dies each having a cavity and an ejector means corresponding to a molded product are formed. In a molding die in which a nesting die is detachably mounted, the nesting die includes, in addition to a mold plate in which a cavity is formed, an ejector plate provided with a cylindrical ejector sleeve for taking out a molded product. , At least one of which has a core pin plate in which a tip portion forms a part of a cavity and in which a core pin slidably fitted in the ejector sleeve is disposed, The movable-side holder is located between the movable-side mold plate in which the nest insertion concave portion is formed, the movable-side mount plate mounted on the molding machine, the movable-side mold plate and the movable-side mount plate, and is arranged to face each other. Is formed between the spacer blocks and each of the spacer blocks and the movable side mounting plate so as to extend in the insertion direction of the nest type, and when the nest type is attached to the movable side holder, A molding die, comprising: a groove portion into which a core pin plate is mounted; and a clamp means which is disposed in a spacer block and fixes the core pin plate to a movable side mounting plate.