JP2608845B2 - Cassette type mold holding structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plurality of cassette molds that are simultaneously attached to and detached from a mold device for injection molding by using an automatic cassette mold changing device. The present invention relates to a cassette-type mold holding structure for integrally holding a plurality of cassette-type molds when they are stored in or taken out of a storage device.

[0002]

2. Description of the Related Art In an injection molding die apparatus in which a cassette type die is exchanged in response to a change in the type of an injection molded product such as plastic, a cassette type die is generally provided for one base die. The one that mounts more than one is adopted. The exchange of the cassette type mold in such a mold device is performed by gripping each cassette type mold by, for example, a vacuum chuck, and mounting another cassette type mold again on the base mold. I have.

In order to improve the efficiency of the cassette-type mold exchanging process, the present applicant grasps a plurality of cassette-type dies simultaneously by connecting them with a connecting member and can attach / detach to / from the base mold. (Japanese Patent Application No. 4-61921).

The outline of the above proposal is as follows.
That is, as shown in FIG.
A lateral groove 51b for fitting to the connecting member 52 is provided on the side of each of the template portions 51a. The connecting member 52 includes a connecting plate 53 and a pair of fixing plates 54a and 54b,
A plurality of cassette type mold accommodating notches 53a ... Are formed by forming rectangular notches in the connecting plate 53 from the upper and lower ends in the drawing to form a comb tooth shape. Fixed plate 54
Reference numerals a and b denote the upper and lower openings of the notch 53a for closing and fixing the cassette type die housed in the notch.
It is connected to 3.

As shown in FIG. 5, the cassette mold 51 is inserted into the opening of each notch 53a of the connecting member 52 while engaging the inside of the notch 53a with the lateral groove 51b of each cassette mold. Each of the cassette-type dies 51 is integrated by connecting the connecting plate 53 and each of the fixing plates 54 by pressing the pair of fixing plates 54 into the two openings, and connecting the connecting plates 53 and the fixing plates 54 with screws. Things.

A large number of the cassette type molds integrated in this way are simultaneously gripped by a chuck of an automatic cassette type mold exchanging device (not shown) so that the base mold 55 can be simultaneously treated.
The cassette-type mold accommodating recesses 55a are detachable from the cassette-type mold accommodating recesses 55a.

[0007]

When a plurality of cassette molds are individually gripped and replaced by, for example, vacuum chucks, as many chucks as the number of cassette molds to be replaced are provided, or In order to chuck one by one, it is necessary to repeat the operation of moving by that number of times.
For this reason, the time required for attachment / detachment becomes longer, and this is an obstacle to improving work efficiency. Further, when the attachment / detachment operation is automated, there is a problem that the device must have a complicated configuration.

[0008] On the other hand, the above-mentioned problem has been solved in a case where a large number of cassette-type dies can be simultaneously attached and detached via a connecting member. However, one connecting plate and 2
In order to fix the cassette type mold by a connecting member composed of three members with a single fixing plate, for example, in a state where the two cassette type molds 51 shown in FIG. After disposing one fixing plate 54a and screwing it to the connecting plate 53, the lower two cassette-type dies 51 are housed in the cutouts 53a, and the other fixing plate 54b is disposed and screwed. In addition, there are many steps for fixing work, which is troublesome.

In addition, there is a high possibility that a manufacturing error and an assembly error will occur as much as the number of parts increases, and higher accuracy is required. In particular, since the cassette mold 51 is positioned in the left-right direction in FIG. 5 only by the shape of the notch 53a, the notch 53a needs to be formed with extremely high precision.

SUMMARY OF THE INVENTION It is an object of the present invention to stably hold a cassette mold with a simpler structure, and to simplify the connecting / holding operation to improve the efficiency of the attachment / detachment / replacement work of the cassette mold. It is in.

[0011]

In order to achieve the above object, the present invention employs the following means. In a cassette-type mold holding structure for integrally holding a plurality of cassette-type dies using a holding plate, the cassette-type die is perforated in the holding plate, and the cassette is perpendicular to a surface direction of the holding plate. A plurality of insertion holes into which the mold can be inserted with gaps, and engraved on both sides of the cassette-type mold. By being mounted between the transverse grooves facing each other between the cassette-type molds, they engage with the transverse grooves facing each other,
An insertion plate for fixing each cassette type mold so as not to be detachable from each insertion hole.

When the insertion plate is mounted, the opposing lateral grooves engage with the insertion plate, and the opposite lateral groove engages with the inner side of the insertion hole.

[0013]

When the cassette mold is inserted into each of the insertion holes of the holding plate, a gap is formed between the inner side of the insertion hole and the lateral groove of the cassette mold. When the insertion plate is inserted between the opposing lateral grooves of the cassette-type mold inserted in the adjacent insertion holes, the cassette-type mold moves outward, and the lateral grooves engraved on the opposite side of the cassette-type mold However, by engaging with the inner side of the insertion hole, each cassette mold is fixed to the holding plate so as not to be separated from each insertion hole.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the present invention integrally holds a plurality of cassette molds, attaches to and detaches from a base mold of an injection molding machine, and stores them in a cassette mold storage device. Basically, it is composed of the holding plate 1, the lateral grooves provided in the plurality of cassette dies 2, and the insertion plate 3 for fixing these cassette dies to the holding plate.

The holding plate 1 is made of a carbon tool steel plate, and has a thickness of 5 mm, a length of 160 mm and a width of 18 mm as an example of dimensions.
Four corners of a 0 mm rectangle are cut out to form grips 1a, 1a on both sides in the longitudinal direction. The holding plate 1 is given a predetermined hardness and strength by being heat-treated after being processed into a predetermined shape.

The holding plate 1 is provided with four rectangular insertion holes 1b formed so as to penetrate in the thickness direction. Specifically, four insertion holes 1b are formed by drilling holes at four locations of a substantially rectangular plate having a thin center portion. A thin partition portion 1d is provided between the left and right adjacent insertion holes 1b, and one end (upper end portion) of the partition portion 1d is a wide plate fixing portion 1e so that an insertion plate 3 described later is mounted. It has become.

The cassette mold 2 is composed of a rectangular mold plate portion 2b and a main body portion 2c, and the vertical length of the mold plate portion 2b is substantially the same as the vertical length of the insertion hole 1b. A lateral groove 2d is formed on each of the left and right side surfaces of the template 2b. The lateral groove 2d forms the inner peripheral wall of the insertion hole 1b of the holding plate 1 and has a thickness such that the inner side 1c facing the partition 1d can be tightly fitted. In this cassette type mold 2,
A cavity 2a is provided.

The insertion plate 3 is made of a thin plate of carbon tool steel formed in a T shape, and an elongated key portion 3a corresponds to the partition portion 1d of the holding plate 1, and a base portion 3b corresponds to the plate fixing portion 1e. It is formed in a shape. Further, a through hole 3c is provided to face the pin hole 1e of the holding plate 1.

The thickness of the insertion plate 3 is set such that the two insertion plates 3 and the thin partition portion 1d are stacked and can be fitted into the lateral groove 2d of the cassette mold 2 in a state of being stacked. Have been.

As the insertion plate 3, two identical plates are used for the front and rear surfaces of the holding plate 1. A spring pin 4 can be mounted in the pin hole 1e of the holding plate and the through hole 3c of the insertion plate.

Next, the use of the present invention will be described.
First, the holding plate 1 is horizontally fixed at a predetermined height on a surface plate (not shown). Next, the four cassette molds 2 are sequentially inserted into the insertion holes 1b of the holding plate 1. As shown in FIG. 2, at this time, the outer side groove 2d of the cassette-type mold is opposed to the inner side 1c of the holding plate, and the inner side groove is held in a state of facing the partition portion 1d.

Next, the key portions 3a of the pair of insertion plates 3 are advanced in the direction of the cassette type mold 2 above and below the partition portion 1d along the concave portions of the holding plate, and the key portions 3a are connected to the adjacent cassettes. Opposing lateral grooves 2 of a mold
Insert between d and 2d. By this inserting operation, the cassette-type dies 2 and 2 move so as to be pushed outward, and as shown in FIG. 3, the outer lateral groove 2d of the cassette-type die engages with the inner side 1c of the insertion hole. And the inner lateral groove 2d
The two insert plates 3, 3 are engaged, and each cassette type mold is fixed so as not to fall off. The insertion plate 3 is stably held between the front and rear surfaces of the partition 1e and the lateral groove 2d of the cassette mold.

After the insertion plate 3 is further advanced and a pair of cassette-type dies inserted in the insertion holes located ahead of the insertion plate 3 are similarly fixed, the pin holes 1f of the holding plate and the through holes of the insertion plate are fixed. 3c are aligned with each other, the spring pins 4 are inserted into these both holes, and the insertion plate 3
Do not fall out.

When the cassette type molds 2 are to be removed from the holding plate 1, the spring pins 4 are pulled out, the insertion plate 3 is pulled out, and finally, the insertion holes 1b of the holding plate 1 are inserted.
Are removed from the four cassette-type molds 2.

The four cassette type molds 2 ... Fixed to the holding plate 1 are moved by grasping the grips 1a on both sides by the chuck of the cassette type automatic mold exchanging device and moving the four simultaneously. It is attached to and detached from the base mold, or is simultaneously stored in a cassette-type mold storage shelf attached to the automatic exchange device, and is taken out.

In this embodiment, the number of insertion holes and the number of cassette-type dies are four. However, the number is not limited to four and may be any number. Further, the dimensions of the holding plate and the insertion plate are merely examples, and it is desirable to arbitrarily set the dimensions according to the size and number of the cassette molds to be held.

[0027]

As described above, according to the present invention,
Since a large number of cassette-type molds are held by one holding plate, and the number of constituent members is small, a cassette-type mold holding structure can be obtained at low cost. Also, by simply inserting the insertion plate between the cassette-type molds inserted into the insertion holes of the holding plate, the cassette-type molds can be stably and integrally held at the same time by an extremely easy operation. This has the effect of improving the efficiency of automatically attaching and detaching the mold.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a configuration of the present invention.

FIG. 2 is a cross-sectional view showing a state in which a plurality of cassette-type dies are inserted into respective insertion holes of a holding plate.

FIG. 3 is a cross-sectional view showing a state where a plurality of cassette molds are fixed to a holding plate.

FIG. 4 is an explanatory view showing a conventional cassette type mold holding structure.

FIG. 5 is an explanatory view showing an attached state of a conventional cassette mold.

[Explanation of symbols]

 1 Holding Plate 1b Insertion Hole 1c Inner Side 2 Cassette Mold 2d Lateral Groove 3 Insertion Plate

Claims (2)

(57) [Claims] 1. A holding structure for a cassette-type mold for integrally holding a plurality of cassette-type dies using a holding plate, wherein the holding member is provided with a plurality of cassette-type dies. A plurality of insertion holes into which the cassette-type mold can be inserted with a gap; and a lateral groove formed in both sides of the cassette-type mold with which an inner side of the insertion hole can be engaged; By being mounted between the transverse grooves facing each other between the cassette molds inserted into the holes, the cassette molds are respectively engaged with the transverse grooves facing each other and the cassette molds are removed from the respective insertion holes. A cassette type mold holding structure, comprising: an insertion plate which is fixed so as not to be detached. 2. The insert plate according to claim 1, wherein the insertion plate is mounted between the adjacent cassette-type dies to engage with the lateral grooves facing each other, and to connect the opposite lateral groove to the inner side. And a cassette-type mold holding structure.