JPH0736729Y2 - Cassette type resin mold - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a resin molding die used for injection molding or the like, and more particularly, to a structure of a mold plate or the like for mounting a cassette whose only molding space is replaceable.

[0002]

2. Description of the Related Art For example, in injection molding, since only a core and a cavity forming a molding space are the ultimate essential constituents, there is an idea that only this part should be formed into a cassette. In the present age of high-mix low-volume production, problems such as the time and effort required for exchanging molds, maintenance of various molding conditions, mold manufacturing period and cost, and maintenance including storage location are problems.

In order to solve this, JP-A-59-17
No. 4331 discloses the technical idea of an exchanging device for sliding a cassette from an upper opening of a mold.

[0004]

By the way, in the cassette to the movable mold plate, it is necessary to mount the ejector cassette plate and the ejector pin at the same time in addition to the movable side cassette plate. In the above-mentioned JP-A-59-174331. No such specific mounting structure was disclosed, and it was not practical on the movable side.

In order to solve the above-mentioned drawbacks, the applicant of the present invention, in Japanese Utility Model Laid-Open No. 63-163923, provides a template with a mounting hole which is opened in a substantially U-shape from the outside of the upper surface intersecting the parting surface. We proposed a structure that attaches a cassette to the hole. Mounting of the ejector cassette plate to the ejector plate has a structure in which the entire ejector plate is inserted into a mounting hole formed in the ejector plate, and there is a problem of ease of mounting, and from the viewpoint of thinning the ejector plate. There was a problem with downsizing or downsizing.

Therefore, an object of the present invention is to provide a resin molding die which can easily mount a cassette on the movable side and can contribute to downsizing by thinning the ejector plate.

[0007]

[MEANS FOR SOLVING THE PROBLEMS] A resin molding die according to the present invention for achieving the above object comprises a fixed mold plate, a movable mold plate, an ejector plate and the like, and only the molding space is exchanged in the mold plate. It is equipped with a cassette that enables it.

The mold is characterized in that the movable cassette is integrally assembled from the movable cassette plate, the ejector cassette plate and the ejector pins between them, and the movable cassette can be mounted on the movable mold plate. Is provided with a mounting hole that is opened in a substantially U-shape from one outside, and the ejector plate is formed with a vertically long mounting hole, and a rear surface of the ejector cassette plate is engaged with the vertically long mounting hole. The stop member is projected.

Further, according to the present invention, the vertically long mounting hole is formed in a retaining structure having a step portion on the front side, and the locking members are provided at two positions with a space in the vertical direction. The head may be located in the vertically long mounting hole and the neck may be located in the step.

[0010]

According to the present invention, the portion of the cassette corresponding to the movable mold plate is aligned with the substantially U-shaped mounting hole of the movable mold plate, and the locking member of the ejector cassette plate is aligned with the vertically long mounting hole of the ejector plate. The cassette is locked and attached to the bottom wall of the movable template by its own weight to mount the cassette.

Since it is only necessary to form the mounting hole corresponding to the locking member in the ejector plate, it is possible to make the ejector plate thin.

[0012]

1 to 3 show an embodiment of a cassette type resin molding die according to the present invention, and a movable die plate is exemplified as the die.

A movable mold plate 2 is attached to the movable side mounting plate 1 via spacer blocks 3 and 3, and an ejector plate 4 is provided between the spacer blocks 3 and 3 so as to be movable back and forth. Further, a fixed mold plate 5 is provided on the fixed side. Between the movable mold plate 2 and the ejector plate 4, the cassette plate 11 and the ejector pins 12. ． Mounting hole 13 that opens in a substantially U shape so that and can be mounted
~ 15 are provided.

More specifically, the movable mold plates 2 and 2 have bottom portions 2a,
2a is divided into left and right in a substantially L-shape, and the bottom surfaces 2a, 2a are formed with a small projection surface. The movable mold plates 2 and 2 are provided with a wide mounting hole 13 on the parting surface side and a narrow mounting hole 14 on the spacer block side. On the left and right side walls 16, 16 of the mounting hole 13, there are ridges 1 as pressing portions.
9 and 19 are projected, and the rear wall 17 is formed in a step shape. The ridge 19 extends from a holding seat 21 which is fixed to a hole 22 which intersects with the mounting hole 13 and is bored from the parting surface side, and the rear surface is preferably formed into a tapered surface 20.
The presser seat 21 is located substantially in the middle of the vertical direction and is screwed with a bolt 23. Reference numeral 24 in the figure denotes a guide pin hole (not shown).

Next, the side end of the ejector plate 4 is notched with a receiving groove 40 on the front side from the middle in the thickness direction, and a retaining piece 41 is formed on the movable die side. A plurality of receiving grooves 40 are formed at the corners of the ejector plate 4, and the retaining pieces 41 have relief portions 42 in the outer diameter dimension of the return pin 6. 4 in the figure
3 is a collar portion of the return pin 6, and 44 is a pin hole of the movable mold plate 2.

Further, the mounting hole 15 of the ejector plate 4 has a vertically long structure and has a retaining structure having step portions 25, 25 on the front side. The ejector cassette plate 11 has a neck 26 on the rear surface.
Locking members 28 having a head portion 27 and a head portion 27 are provided so as to project vertically. The spacer blocks 3 and 3 can be opened upward by being arranged so as to face each other in the vertical direction, and an insertion portion 29 is provided in the middle so as to be recessed.

The movable cassette plate 10 has a core surface 1 on the front surface.
0a, and recesses 30 and 30 are formed on the left and right as pressing portions. The rear surface of the groove 30 can be formed as a tapered surface 31. The movable cassette plate 10 is provided with an ejector cassette plate 11 and ejector pins 1 extending from the ejector cassette plate 11.
2. ． It is assembled and assembled as a set.

When assembling based on the above construction, when the collar portion 43 of the return pin 6 is laterally engaged with the receiving groove 40 of the ejector plate 4, the collar portion 43 is detached by the retaining piece 41 and is prevented from coming off in the front-rear direction. At the same time, the pin rear end portion 6a enters from the escape portion 42 and enters the set state. Next, when the movable mold plates 2 and 2 are attached, the front half portions 6b and 6b of the return pins 6 and 6 are engaged with the pin holes 44 and 44 of the movable mold plates 2 and 2 to complete the process. The movable mold plates 2 and 2 face each other and are substantially U-shaped.
A pair of letter-shaped elements are arranged, and the pair of spacer blocks 3, 3 are fixed in the same manner.

Next, when the cassette die is replaced, the movable cassette plate 10 and the ejector pin 12. ． If the ejector cassette plate 11 and the ejector cassette plate 11 are positioned, the tapered guide portions 13a to 15a are formed.
Will be guided in. In the movable cassette plate 10, the recessed lines 30, 30 are guided by the protrusions 19, 19, and at the same time, the ejector cassette plate 11 is brought into contact with the bottom wall 18 by its own weight by the locking member 28 being guided by the mounting hole 15. You will be involved until you contact them. The movable cassette plate 10 includes side walls 16 and 16 and a rear wall 1.
7 and the bottom wall 18 are mounted in a restricted state. Further, the locking member 28 of the ejector cassette plate 11 is prevented from coming off when the head portion 27 is located in the mounting hole 15 and the neck portion 26 is located in the step portion 25.

At this time, the ejector pin 12. ． From the mounting hole 14 and the openings of the spacer blocks 3 and 3 to the mounting without contacting each other.

The exchange on the fixed side can be performed in the same manner as the exchange on the movable side. That is, the fixed mold plate 6 is provided with the mounting hole 32 opening upward, and the pressing seat 33 having the protrusion 34 is screwed into the mounting hole 32 with the bolt 35. Corresponding to this, when the fixed cassette plate 36 is formed and the concave lines 37, 37 are formed on the side surface thereof, the fixed cassette plate 36 is formed in the mounting hole 32.
Can be installed. At this time, the taper surfaces 34a, 37a of the projections 34 and the recesses 37 are brought into surface contact with each other to perform tightening. In the figure, 36a is the cavity surface side.

When the movable mold plates 2 and 2 are constructed based on the above embodiment, the bottom portion can be reduced by about 1/2.

In this embodiment, the divided structure of the movable mold plates 2 and 2 is illustrated, but the fixed mold plate 5 can be similarly divided.

[0024]

As described above, according to the present invention,
A movable cassette, which is a combination of a movable cassette plate, an ejector cassette plate, and an ejector pin between them, can be easily inserted into a substantially U-shaped mounting hole and a vertically long mounting hole from one direction outside the movable template plate and the ejector plate. Can be installed.

Further, since the mounting hole of the ejector plate need only have a shape corresponding to the locking member, it can be made thin, which contributes to downsizing or downsizing of the die.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a cassette-type resin molding die according to the present invention.

FIG. 2 is a cross-sectional view seen from a plane.

FIG. 3 is a plan view of the same.

[Explanation of symbols]

 2 movable mold plate 4 ejector plate 5 fixed mold plate 10 movable cassette plate 11 ejector cassette plate 12 ejector pin 13, 14 mounting hole 15 vertically long mounting hole 25 step portion 26 neck portion 27 head portion 28 locking member

Claims (2)

[Scope of utility model registration request] 1. A resin molding die comprising a fixed mold plate, a movable mold plate, an ejector plate and the like, and a cassette for mounting only a molding space in the mold plate, wherein the movable mold plate and the ejector cassette are provided. The movable side cassette is integrally assembled from the plate and the ejector pin between them, and the movable mold plate is provided with a mounting hole for opening the movable side cassette in a substantially U-shape from one outside, A vertical mounting hole is formed in the ejector plate, and a locking member for locking the vertical mounting hole is projected on the rear surface of the ejector cassette plate. Mold for resin molding. 2. The vertically-long mounting holes are formed in a retaining structure having a step on the front side, and the locking members are provided at two locations at intervals in the vertical direction and each vertically-long mounting hole. 2. The cassette-type resin molding die according to claim 1, comprising a head located at the step and a neck located at the step.