JPH0985747A - Holding structure for cassette die - Google Patents

Abstract

PROBLEM TO BE SOLVED: To individually insert or remove cassette dies for a holding structure which integrally holds a plurality of cassette dies. SOLUTION: A protubelance (1c) is formed on one edge (1b) of each insertion hole (1a) of an attaching plate 1 which simultaneously holds a plurality of cassette dies 2, and on the other edge (1d) of the insertion hole, a pair of sliding groove parts (1e) are provided in the direction being orthogonal to the edge (1d). By engaging the leading end of a holding apparatus 3 being pinched by each sliding groove, with another lateral groove part 4c on a die plate 4, the cassette die 2 is held in the insertion hole. In this case, an engaging piece 7 is engaged with a gap which is generated between the other edge (1d) on the internal side of the insertion hole and the other edge of the die plate 4, and by sliding the engaging piece 7 along the gap, the advancing/retracting of the holding apparatus 3 can be restricted. When the engaging piece 7 is engaged with the holding apparatus 3, the cassette die is fixed to the attaching plate, and when the engaging piece 7 is removed, the holding apparatus can be retracted, and the cassette dies can be individually inserted/removed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette mold holding structure for simultaneously moving a plurality of cassette molds by an automatic cassette mold changing device or the like.

[0002]

2. Description of the Related Art In recent years, a plastic injection molding die apparatus has a cassette-type main portion of the die in order to facilitate the exchange of the die for obtaining different kinds of molded products. A cassette-type injection molding die device that is designed to be replaced is often used. In general, injection molding often employs a so-called multi-cavity mold in which a plurality of cavities are formed so as to obtain a plurality of molded products at the same time, but when a cassette mold is adopted, one base is used. Injection molding is performed by inserting a plurality of cassette molds into the mold.

By the way, the cassette mold can be replaced manually, but recently, automation of the cassette mold replacement has been attempted, and an automatic cassette mold replacement device has been adopted. In the initial cassette die automatic changer, a plurality of cassette dies were individually gripped using a gripping means and reciprocated between the base mold and the storage rack of the spare mold. However, since this is inefficient, recently, a cassette equipped with a cassette mold holding structure that grips a plurality of cassette molds in a state of being connected by a connecting member, and at the same time can be attached to and detached from a base mold and can be conveyed There is a tendency to adopt an automatic die changer.

Under such circumstances, the present applicant has previously proposed a cassette mold holding structure having a simple structure and facilitating the mounting and dismounting operation of the cassette mold (Japanese Patent Laid-Open No. 6-3.
12440). In this proposal, a cassette mold is inserted into and removed from a base mold in which a plurality of cassette molds are arranged in two rows, two rows in each row. Use the holding plate to engage and hold the lateral grooves provided on both sides of the mold plate of the cassette mold on the inside of the insertion hole, insert the plate between the rows of the cassette mold, and insert all the cassette molds. The mold is held at the same time so that it cannot be removed.

[0005]

It can be said that the above-mentioned applicant's proposal has an advantage that a plurality of cassette molds can be held by an extremely easy operation, and the number of constituent members is small, so that the cost can be reduced. . However, it handles a plurality of cassette molds at the same time, and even when only one of the cassette molds is to be replaced for repair,
Since all the cassette molds have to be released from the holding plate once, there is a problem that the trouble is troublesome.

Further, since a plurality of cassette molds are simultaneously held by a common member (insertion plate), for example, during the operation of the cassette mold automatic changer,
When a problem occurs such that the cassette mold collides somewhere, there is a problem that the adverse effect of the problem spreads to all the cassette molds. This is due to the fact that a common member is used to fix all of the cassette molds to the mounting plate at the same time, and multiple cassette molds can be individually fixed to the mounting plate. For example, it is possible to limit the adverse effect to only the cassette die in which the defect has occurred.

Therefore, an object of the present invention is to make it possible to insert and remove a plurality of cassette molds held by a mounting plate individually and easily.

[0008]

In order to achieve the above-mentioned object, the present invention individually holds a cassette mold in a plurality of insertion holes provided in a mounting plate of the cassette mold so that the cassette mold can be inserted and removed individually. In the structure for holding the cassette mold, a lateral groove that can be engaged with one side of the inner side of the insertion hole is formed on each side of the opposite side of the mold plate of the cassette mold so as to face the one side of the inner side of the insertion hole. On the other side, a pair of slide groove portions extending in a direction orthogonal to the other side are formed, and in each slide groove portion,
When the U-shaped holder is slidably engaged by its legs, and one of the lateral grooves of the template is engaged with one side of the inner side of the insertion hole. Further, the cassette mold can be held on the mounting plate by engaging the tip of the holder with the other of the lateral grooves of the template, and one of the lateral grooves of the template is engaged with one side of the inner side of the insertion hole. When the other side of the horizontal groove of the template is engaged with the tip of the holder, a predetermined size is provided between the other side of the horizontal groove of the template and the other side of the inner side of the insertion hole. As the gap is created, a gap is created in the leg portion of the holder, and a locking piece having locking means can be inserted into and removed from the gap in the leg portion. Of the cassette die that slides or is fixed by inserting and removing it in the gap of the That.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is a holding structure for a cassette mold in which a plurality of cassette molds can be held and moved, and each cassette mold can be attached to and detached from a cassette mold mounting plate. As for the present invention, a description will be given here of one mounting plate 1 as shown in FIG. 2 in which four cassette molds 2 are held.

FIG. 1 illustrates a procedure for attaching / detaching to / from a mounting plate for one of the four cassette molds shown in FIG. As shown in FIG. 1, the insertion hole 1a provided in the mounting plate 1 has a substantially rectangular shape in the embodiment of the present invention, and the cassette mold 2 is provided at both ends of the long side 1b. A pair of protrusions 1c for locking is formed (only one is shown).

A pair of slide groove portions 1e, 1e are formed in the direction orthogonal to the long side of both sides of the other long side 1d opposite to the long side 1b of the insertion hole 1a. . Respective holders 3 and 3 formed in a U shape are engaged with the respective slide groove portions 1e and 1e so as to sandwich both upper and lower surfaces of the slide groove portion 1e. The holder 3 is capable of slidably engaging the upper and lower legs 3a and 3a with the slide groove portion 1e, and moves forward and backward along the slide groove portion 1e, and the tip portion 3b has the other lateral groove portion of the template 4. It is possible to engage with 4c, 4c.

The cassette mold 2 comprises a mold plate 4 having a cavity 4a, a bottom plate 5 and a spacer 6. Template 4
Has a rectangular shape substantially corresponding to the insertion hole 1a of the mounting plate 1, and as described above, at the ends of the long sides,
Lateral groove portions 4b, 4 engageable with the convex portion 1b of the insertion hole, respectively.
c is provided.

The cassette mold 2 is inserted into the insertion hole 1a of the mounting plate 1, and the convex portion 1c provided on one side 1a of the inner side of the insertion hole 1a is engaged with one lateral groove portion 4b of the template. When pressed against, a gap of a predetermined size is formed between the other side of the template 4 and the other side 1d of the inner portion of the insertion hole 1a. A pair of locking pieces 7 having locking means 7a can be slidably fitted in this gap. The holder 3 is pulled out from the slide groove portion 1e so as to traverse this gap, and the tip portion 3b thereof is formed.
Is engaged with the other lateral groove portion 4c of the mold plate 4, the cassette mold 2 is held by the mounting plate 1 in the insertion hole 1a via the convex portion 1c and the holder 3. At this time, a gap is also formed between the concave portion 3c formed between the leg portions 3a of the holder 3 and the other side 1d on the inner side of the insertion hole 1a. In this gap, the locking means 7a of the locking piece 7 for maintaining the engaged state of the holder 3 is provided.
Can be fitted. The locking piece 7 is an arm 7b that elastically clamps the upper leg 3a of the holder 3 together with the locking means 7a.
And the insertion hole 1 formed on the central side of the arm 7b.
It is composed of a knob portion 7c which regulates the depth position of the locking piece 7 to be inserted into the above-mentioned gap by being hooked on the other piece 1d on the inner side of a. The locking means 7a can be inserted into and removed from the gap of the holder 3 by gripping and sliding the knob portion 7c. When the locking piece 7 fitted in this gap is slid along the clearance and the locking means 7a fits in the clearance in the leg portion 3a, the holder 3 cannot be retracted, and the locking means 7a is pulled from this clearance. When the holder 3 is removed, the holder 3 can be retracted, and the cassette mold 2 can be removed by retracting the holder 3.

In the above-mentioned cassette mold holding structure, when the cassette mold 2 is inserted into the insertion hole 1a of the mounting plate 1, one lateral groove portion 4b and one side convex portion 1c of the insertion hole 1a are formed. Engage. Next, the tip portion 3b of the holder 3 is pulled out and engaged with the other lateral groove portion 4c, and the locking piece is formed in the gap formed between the other side of the template 4 and the other side 1d of the inner side of the insertion hole 1a. The locking means 7a of 7 is fitted.
Next, when this is moved to the outside, the locking means 7a engages with the gap formed between the other side 1d of the inner side of the insertion hole 1a and the recess 3c of the holder 3. Here, the locking means 7a
Is regulated by the elastic force of the arm portion 7b so as not to fall off, so that the cassette mold 2 is held by the mounting plate 1 via one side 1a of the inner side of the insertion hole 1a and the holder 3. This inserting operation is performed for each cassette mold.

If any one of the four cassette molds 2 fails, the locking piece 7 and the holder 3 of the corresponding cassette mold 2 are slid and inserted. It can be removed, and the other cassette molds 2 can be held, which is convenient for maintenance and repair of the molds.

FIG. 2 shows a state in which the four cassette molds 2 held by the above-mentioned cassette mold holding structure are about to be housed in the cassette mold housing recess 8 of the base plate B at the same time. As shown in the drawing, the four cassette molds 2 move integrally and are attached to and detached from the base plate B. To move these cassette molds, the grips 1 provided on both sides of the mounting plate 1
It is possible to grip f and 1f with a chuck of an automatic cassette mold exchanging device and insert / remove into / from the cassette mold accommodating recess 8, or to store or take out the cassette mold accommodating shelf.

Although the embodiment of the present invention is described as holding four cassette molds at the same time, the number of cassette molds is not limited. Further, although the operation of attaching / detaching the integrated cassette die to / from the base plate B is performed by a robot, this can of course be performed manually by an operator.

Further, in the embodiment of the present invention, the locking piece 7 is made of plastic resin. Therefore, for example, there occurs some trouble that the cassette mold 2 collides with something during automatic replacement of the plurality of cassette molds 2 integrally held by using the cassette mold automatic changing device. In this case, since the locking pieces 7 of the embodiment of the present invention are made of plastic resin and the cassette molds 2 are individually fixed to the mounting plate 1, the cassette molds 2 that collide with each other are made of plastic. It is possible to protect the cassette mold 2 by absorbing the impact of the collision by breaking the locking piece 7, and in the worst case, even when the cassette mold 2 that collides falls off and breaks, It is possible to limit the adverse effects of defects to only the cassette mold 2. That is, when the cassette mold 2 is integrally held and the automatic replacement device of the cassette mold 2 is used for automatic replacement work, a plurality of cassette molds 2 are held by a common member as in the conventional case. In case of trouble such as collision, all of the integrated cassette molds will fall from the chuck of the automatic changer, or the common member will be removed and the cassette mold 2 will not be held. There was a concern that all of the cassette molds 2 that were disabled and fixed would fall off the mounting plate 1, but they are held integrally as in the embodiment of the present invention. If the cassette molds 2 are held individually, it will only affect the cassette molds 2 that have encountered problems such as collisions, and prevent all cassette molds from being adversely affected. Is possible

[0019]

According to the present invention, in a cassette mold holding structure for simultaneously holding and moving a plurality of cassette molds on a mounting plate, the cassette molds can be individually inserted into and removed from the mounting plate. , When inspecting or repairing individual cassette molds, other cassette molds that do not need to be inserted and removed can be left as they are, and only the target cassette mold can be inserted and removed, eliminating the need for extra insertion and removal operations. Becomes As a result, the maintenance of the cassette mold becomes easy.

Further, according to the present invention, since the cassette mold is held in the insertion hole by using the holder and fixed by the locking piece, the cassette mold can be inserted and removed very easily. .

Further, by individually holding the cassette molds, when a problem such as a collision occurs during the replacement using the cassette mold exchanging device, only the cassette mold which has encountered the problem is adversely affected. It is possible to prevent the other cassette molds from being adversely affected only by the influence of.

[Brief description of drawings]

FIG. 1 is a three-dimensional assembly diagram showing a procedure for inserting and removing a cassette mold according to the present invention.

FIG. 2 is a perspective view showing a state in which a plurality of cassette molds that are integrally held are attached to and detached from an injection molding mold device.

[Explanation of symbols]

 1 Mounting Plate 1a Insertion Hole 1e Slide Groove 2 Cassette Mold 3 Holding Tool 3a Leg 3b Tip 4 Template 4b, 4c Lateral Groove 7 Locking Piece 7a Locking Means

Claims (1)

[Claims] 1. A cassette mold holding structure for individually and detachably holding a cassette mold in a plurality of insertion holes provided in a mounting plate of the cassette mold, wherein: A lateral groove that can be engaged with one side of the inner side of the insertion hole is formed on each side of the opposite side, and the other side facing the one side of the inner side of the insertion hole is orthogonal to the other side. A pair of slide groove portions extending in the direction is formed, and a retainer formed in a U shape is slidably engaged with each of the slide groove portions by its leg portion. When one of the lateral groove portions of the mold plate is engaged with one side of the inner side portion of the insertion hole, the tip end portion of the holder is engaged with the other lateral groove portion of the mold plate to thereby form the cassette mold. Can be held on the mounting plate, and one of the lateral groove portions of the template is When one side of the inner side of the insertion hole is engaged and the other side of the lateral groove of the template is engaged with the tip of the holder, the other side of the lateral groove of the template and the inside of the insertion hole are engaged. A gap of a predetermined size is formed between the other side of the portion and a gap is formed in the leg portion of the holder,
A locking piece having locking means for the leg can be inserted into and removed from the gap in the leg, and the holder is inserted and removed in the gap in the leg to remove the locking piece. A cassette mold holding structure, wherein the cassette molds held on a mounting plate can be individually inserted and removed.