JPH0692138B2 - Ferrule molding equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ferrule molding apparatus, and more particularly, it can prevent breakage of a core that occurs during mold closing and mold opening, and prevent damage to a molded product that occurs during demolding work. The present invention relates to a ferrule molding apparatus formed so that the yield of molded products can be improved.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 9, a device of this type conventionally has a core 1 mounted orthogonally on a side surface thereof, a mounting plate 3 on a fixed side on which a sprue 2 is formed, and this mounting plate. 3, a movable mold plate 4 formed to move toward and away from the mold 3 so that the mold can be opened and closed, and a molded product mold provided with the movable mold plate 4 and a pin 5 for ejecting the molded product. And the mechanism 6. And in this conventional product,
When the mold is closed, a cavity 7 into which the core 1 is inserted at the axial center position is formed in the movable side mold plate 4, and a pore 8 for supporting the tip of the core 1 is formed in the bottom of the cavity 7. Was there.

[0003]

In the above conventional product, however, as shown in FIG. 9B, the core is mounted on the mounting plate in a state where the entire core is exposed. The core is apt to be swung by the generated vibration or the like, and the movable side mold plate is moved toward the above-mentioned mounting plate under such a state to close the mold. Therefore, when the conventional device of this kind is used, for example, at the time of mold closing, the core is not accurately and smoothly inserted into the pores, and there is an adverse effect that the ultrafine and expensive core is easily broken. However, there is a problem that the maintenance cost of the device is high because the life of the core is short and the replacement of the core requires a lot of labor and time.

By the way, in the case of this type of molded product, due to its nature, it is impossible to form a draft for facilitating the die cutting. However, in the conventional device, as shown in the figure, a pin for ejecting a molded product is arranged at a location such as a runner and the runner is projected to release the molded product. When used, there is a problem that the molded product is difficult to release from the mold, and as a result, the molded product is easily damaged during the die cutting operation.

The present invention is intended to solve the problems of such conventional products. Therefore, the technical problem of the present invention is that it is possible to prevent the core from being broken during the molding operation, to keep the maintenance cost of the device at a low cost, and to facilitate the release of the molded product to improve the yield. It is to provide a molding device for a ferrule formed as described above.

[0006]

The present invention employs the following technical means in order to solve the above problems. That is, according to the present invention, in the ferrule molding apparatus which has been conventionally formed as described above, the fixed side mold having the insertion hole 11 of the core 1 and the tapered through hole 12 communicating with the sprue 2 is formed. With respect to the mounting plate 3, the plate 10 is provided between the mounting plate 3 and the movable side mold plate 4 with a space a from the mounting plate 3 for the length of the core 1 inserted into the cavity 7. It is provided so that it can be moved in and out freely. The cavity 7 formed in the movable side mold plate 4 is formed in the shape of a through hole, and the molded product release mechanism 6 is formed by the core 1 described above.
Cavity forming rod 1 which is formed with a core supporting hole 19a for supporting
9 and a return pin 14 which returns the cavity forming rod 19 and the pin 5 to the original position when the mold closing is completed. In the device of the present invention, the core 1 is set to have a length such that the tip is arranged at the outlet portion 11a of the insertion hole 11, and the fixed-side mold plate 10 has a pin 5 for ejecting a molded product. The insertion hole 13 and the insertion hole 15 of the return pin 14 are formed in a penetrating manner. Further, when the fixed-side mold plate 10 moves toward and away from the mounting plate 3, the fixed-side mold plate 10 is inserted into the insertion hole 13 to prevent resin from flowing into the insertion hole 13, and An insertion pin 16 for preventing swinging during movement is provided on the side surface of the mounting plate 3 in an orthogonal manner.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the accompanying drawings. As described above, in the device of the present invention, the core 1 is attached to the side surface in an orthogonal manner, and the fixed-side mounting plate 3 on which the sprue 2 is formed, and the mold closing mold opening operation by contacting and separating with respect to the mounting plate 3. The movable mold plate 4 is formed so as to be movable, and the molded product release mechanism 6 provided on the movable mold plate 4 and provided with a pin 5 for ejecting the molded product. In the present embodiment, the core 1 is formed in an extended shape at the tip of the core supporting rod 9 and is attached to the side surface of the mounting plate 3 via the core supporting rod 9. Reference numeral 5a is a runner projecting pin as the molded product projecting pin 5, and 5b is a sprue projecting pin as the molded product projecting pin 5.

Reference numeral 7 is a cavity into which the core 1 is inserted in the axial center position when the mold is closed. This cavity 7
Are formed in the movable mold plate 4 in the shape of through holes.

Further, 10 is the mounting plate 3 and the movable side mold plate 4 described above.
It is a fixed side template provided between and. The fixed-side mold plate 10 is provided so as to be movable in and out of contact with the mounting plate 3 with a distance a from the mounting plate 3 corresponding to the length of the core 1 inserted into the cavity 7. Fixed side template 10
An insertion hole 11 for the core 1 is formed therein, and a tapered through hole 12 that communicates with the sprue 2 is formed therein. The core 1 has the insertion hole 11 at the tip.
The length is set to be arranged at the outlet 11a. In addition, the fixed-side mold plate 10 is formed with an insertion hole 13 for the pin 5 for ejecting the molded product and an insertion hole 15 for the return pin 14 in a penetrating manner. In this embodiment, the insertion hole 13 is transparently provided at a position of the fixed-side template 10 facing the tip of the runner projecting pin 5a, and the runner projecting pin 5a is inserted therein.

When the fixed-side mold plate 10 is moved toward and away from the mounting plate 3, the reference numeral 16 is fitted into the insertion hole 13 to prevent the resin from flowing into the insertion hole 13. At the same time, it is an insertion pin that prevents the fixed-side mold plate 10 from swinging during movement. The insertion pin 16 is provided on the side surface of the mounting plate 3 in an orthogonal manner. It should be noted that the protruding length of the inserting pin 16 is such that the side surface of the fixed side mold plate 10 with which the movable side mold plate 4 abuts and the tip of the inserting pin 16 are flush with each other when the mold closing is completed. Is set.

Reference numeral 17 is a support pin for guiding the fixed mold plate 10 and the movable mold plate 4 described above. Reference numeral 18 denotes a stopper provided on the support pin 17, and the fixed-side template 10 is restricted by the stopper 18 so that it can be moved only within the range of the distance a.

Reference numeral 19 denotes a core support hole 19 for supporting the core 1.
It is a cavity forming rod in which a is formed and is slidably inserted in the cavity 7 so that the molded product 20 can be projected together with the pin 5. The molded product release mechanism 6 includes the cavity forming rod 19, and the return pin 14 that returns the cavity forming rod 19 and the pin 5 to the original position when the mold closing is completed. There is. Reference numeral 21 is an ejector plate to which the base ends of the pin 5, the return pin 14, and the cavity forming rod 19 are fixed. Reference numeral 22 is a protruding rod that moves the ejector plate 21 forward and backward.

Next, the operation of this embodiment will be described. First,
When the mold is closed, the movable mold plate 4 is guided from the state shown in FIG. 2 by the support pins 17 and moved to the mounting plate 3 side. Then, the tips of the runner projecting pins 5a, 5a are inserted into the insertion holes 13, the return pins 14 are inserted through the insertion holes 15, and the movable side mold plate 4 contacts the fixed side mold plate 10 (see FIG. 3). Therefore, by this, the tip of the cavity forming rod 19 is arranged face-to-face with the tip of the core 1 at a close distance. In this case, the return pin 14
Is dimensioned so that its tip contacts the side surface of the mounting plate 3. In the case of this embodiment, the tip of the sprue projecting pin 5b is configured to be inserted into the through hole 12.

Next, in this state, the movable side mold plate 4 moves to the mounting plate 3 side together with the fixed side mold plate 10. Then, the ejector plate 21 moves leftward in the drawing and moves backward in accordance with the moving distance between the movable side mold plate 4 and the fixed side mold plate 10,
Further, the insertion pin 16 is inserted into the insertion hole 13. Immediately before the mold closing is completed, the tip of the core 1 is inserted into the core support hole 19a of the cavity forming rod 19 (see FIG. 4).

After the mold closing operation is completed in this way,
Injection of resin is started via the sprue 2, and the injected resin flows into the runner and then is filled in the cavity 7 (see FIG. 5). In this case, since the inside of the insertion hole 13 is closed by the insertion pin 16, the resin does not flow into the insertion hole 13 from the runner.

Thus, the resin is cooled and hardened in the mold,
When the molded product 20 can be taken out, first, the movable side mold plate 4 and the fixed side mold plate 10 are separated from the mounting plate 3 while being integrated. The fixed-side mold plate 10 is restricted from moving by the stopper 18, and the moving distance is the distance a which is the insertion length of the core 1. Therefore, the movable-side mold plate 4 and the fixed-side mold plate 10 are separated from the mounting plate 3. When separated, the core 1 is moved to the core support hole 19a.
And, it is removed from the molded product 20 (see FIG. 6).

Thereafter, the movable side mold plate 4 is further retracted,
It is separated from the stationary mold plate 10 (see FIG. 7). Then, in this state, the projecting rod 22 is advanced (see FIG. 1). As a result, the ejector plate 21 is advanced and the runner projecting pin 5a, the sprue projecting pin 5b, and the cavity forming rod 19 are respectively projected, so that the molded product 20 is released from the mold. As shown in FIG. 8, the molded product 20 is one in which the sprue portion 20a and the runner portion 20b are integrally taken out.

In the above, in the case of the present invention, the above-mentioned interval a may be appropriately selected according to the length of the molded product 20.

[0019]

As described above, in the device of the present invention,
The fixed-side mold plate with the core insertion hole is mounted between the fixed-side mounting plate and the movable-side mold plate with a gap from the mounting plate for the length of the core inserted into the cavity. The core is provided so as to be movable in and out of contact with the plate, and in this case, the core is set to have a length such that the tip of the core is arranged at the outlet of the insertion hole. In addition, the fixed side mold plate is formed with a through hole for a pin for ejecting a molded product and a through hole for a return pin, and is inserted into the above-mentioned insertion hole to prevent resin from flowing into this insertion hole. In addition, insertion pins that prevent the fixed-side mold plate from swinging during movement are provided orthogonally to the side surface of the mounting plate.

Therefore, in the case of the present invention, the core is protected by the fixed side mold plate and is not easily affected by vibration and the like, and moreover, the core can be inserted in a state very close to the above-mentioned core support hole. The core can be inserted well, and in the present invention, when the mold is opened, the core can be pulled out by separating the movable side mold plate and the fixed side mold plate from the above mounting plate while keeping them in close contact with each other. It is possible to reduce vibrations and the like that sometimes occur. Further, in the device of the present invention, especially when these mold closing molds are opened, the fixed side mold plate can be moved in a stable state by the above-mentioned return pin and insertion pin. The swinging that occurs when the closed mold is opened can be greatly reduced. As a result, by using the device of the present invention, it is possible to prevent the situation where the core is broken at the time of mold closing or mold opening, so that the life of the core can be extended and the time and effort required for replacing the core can be reduced. It has an excellent effect that the maintenance cost can be reduced.

Further, in the apparatus of the present invention, the cavity forming rod is slidably fitted in the cavity so that the molded product can be freely projected together with the pin. Therefore, when the present invention is used, since the molded product can be directly projected by the cavity forming rod, it is possible to easily remove the molded product from the mold, and as a result, it is possible to prevent damage to the molded product that occurs during the mold releasing work. There is an advantage that the yield of molded products can be improved.

[Brief description of drawings]

FIG. 1 is an operation explanatory view when a molded product is projected showing a preferred example of the present invention.

FIG. 2 is an operation explanatory view showing a state before a mold closing operation.

FIG. 3 is an operation explanatory view during a mold closing operation.

FIG. 4 is an operation explanatory diagram when the mold closing is completed.

FIG. 5 is an operation explanatory diagram when resin injection is completed.

FIG. 6 is an operation explanatory view when the mold opening is started and the core is pulled out.

FIG. 7 is an operation explanatory diagram when the mold opening is completed.

FIG. 8 is a perspective view showing a state of a molded product.

9A and 9B show a conventional device, A is an operation explanatory view when a mold is closed, B is an operation explanatory view showing a state after a mold is opened and before a molded product is projected, and C is an enlarged view of a main part when the mold is closed.

[Explanation of symbols]

 1 core 2 sprue 3 mounting plate on fixed side 4 movable side mold plate 5 pin for ejecting molded product 6 molded product release mechanism 7 cavity 10 fixed side mold plate 11 insertion hole 11a outlet 12 through hole 13 for protruding molded product Pin insertion hole 14 Return pin 15 Return pin insertion hole 16 Insertion pin 19 Cavity forming rod 19a Core support hole 20 Molded product a Interval

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location // B29L 31:28 4F

Claims (1)

[Claims] 1. A fixed side mounting plate on which a core is mounted orthogonally on a side surface and a sprue, and a movable side which is formed so as to be movable toward and away from the mounting plate so that a mold closing mold opening operation is possible. A mold plate and a mold release mechanism provided on the movable mold plate and provided with pins for projecting the molded product, and the cavity into which the core is inserted at the axial center position when the mold is closed is In a ferrule molding apparatus formed on a movable side mold plate, a fixed side mold plate having a through hole for the core and a tapered through hole communicating with the sprue is formed on the mounting plate and the movable side. Formed on the movable side mold plate so that it can be moved toward and away from the mounting plate with a gap of the length of the core inserted into the cavity from the mounting plate. The cavity is formed in the shape of a through hole, Further, in the above-described molded product release mechanism, a core support hole for supporting the above core is formed, and a cavity is formed so that the molded product can be projected together with the above pin by being slidably inserted into the above cavity. A rod, a return pin that returns the cavity forming rod and the pin to the original position when the mold closing is completed, and the core is set to a length such that the tip is arranged at the outlet of the insertion hole.
In addition, the fixed-side template is provided with a through hole for a pin for ejecting a molded product and a through-hole for the return pin, and the fixed-side template is moved toward and away from the mounting plate. In doing so, an insertion pin that is fitted into the insertion hole to prevent the resin from flowing into the insertion hole and to prevent the fixed-side mold plate from swinging when moving is formed orthogonal to the side surface of the mounting plate. The ferrule molding device provided.