JPS5829220B2 - Cushioning material molding equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cushioning material molding device, in which the shape of the cushioning material is vertically divided into four or more flocks and placed in a packaging box in the shape of a hollow rectangular housing with a bottom. By having a structure in which one of a pair of uneven molds for molding the cushioning material in the shape of a hollow rectangular case with a bottom is fixed to a corresponding mounting frame as a common mold, and the other is detachably attached to the corresponding mounting frame. An object of the present invention is to provide a cushioning material molding device that can extremely simply and efficiently mold a cushioning material having a constant bottom shape by simply replacing the other mold.

Generally, when storing audio equipment, etc. in a packaging box such as a cardboard box, a cushioning material made of, for example, styrofoam is interposed between the packaging box and the audio equipment to buffer the impact applied to the packaging box.

In that case, conventionally, a pair of cushioning materials are often placed opposite each other over the entire length of a pair of opposing side walls of the packaging box, and therefore, the size and shape of the cushioning materials in that case are different from those of the corrugated pole box, etc. to which it is applied. This makes it difficult to standardize the size of cushioning materials, and furthermore, in the case of cushioning materials applied to large cardboard boxes, etc., the size of each cushioning material becomes large, making it difficult to handle. It had the following drawbacks.

Furthermore, since there are many types of conventional cushioning materials mentioned above, it is necessary to prepare a large number of molds for molding, from small to small size, and even if molds are to be made from one mold frame at a time, only one mold is needed. Since the area of the mold is large, the entire device becomes large.
This method has disadvantages such as requiring a large amount of space to store molds that are not in use.

Furthermore, with the above-mentioned conventional molding machine, the mold must be replaced with the mold mounting frame every time cushioning materials of different sizes and shapes are manufactured. It is very troublesome to install or remove the mold mounting frame, and the molding machine must be stopped for a long time while replacing the mold mounting frame. It had drawbacks such as:

The present invention eliminates the above-mentioned drawbacks, and an embodiment thereof will be described below with reference to the drawings.

FIG. 1 is a perspective view of an example of a cushioning material that can be molded by the cushioning material molding apparatus of the present invention before longitudinal division;
The figure is a perspective view of the cushioning material vertically divided and stored in a packaging box, FIGS. 3A and 3B are longitudinal cross-sectional views of one embodiment of the cushioning material molding apparatus according to the present invention, and FIG. The figure shows an arrow view along the Y-Y line in FIG. 3A.

In Figure 1, 1 is a buffer material that is not vertically divided;
It consists of a hollow rectangular body with a bottom, such as styrofoam.

This cushioning material 1 has a structure in which four blocks la, lb, 1c, and ld with an L-shaped cross section are integrally provided on the bottom surface, and between each block 1a to 1d there is a cross-shaped groove 2a, 2
It is divided by b.

When the cushioning material 1 is placed in a packaging box 3 such as a corrugated pole box shown in FIG. block 1
Vertically divided into a to 1d, each vertically divided block 1
8 to 1d are each fixed to the four corners of the packaging box using an adhesive or the like.

In this way, since the four blocks 1a to 1d only need to occupy a certain size in the four corners of the packaging box 3, the size of each block 1a to 1d can be standardized to some extent regardless of the size of the packaging box 3. can be converted into

Therefore, if cushioning materials 1 having the same bottom area are prepared, they can be applied to packaging boxes 3 of different sizes.

The cushioning material molding device 4 includes a concave unit 4a and a convex unit 4a)
It is roughly composed of 4b.

The concave UNISO) 4a is a frame 6 made of a single metal plate 5.
A mold mounting frame 1 is attached to the mold mounting frame 7, and in this embodiment, for example, four rectangular holes 8 are bored in the mold mounting frame 7.

9 is a concave mold that determines the outer shape of the cushioning material 1 to be molded.Since the bottom shape and size of the cushioning material 1 are standardized, the shape and size of the corresponding convex mold can be adjusted. It can be standardized into a constant shape regardless of the shape.

This concave mold 9 is fixed to the mounting frame 7, for example, by bolting.

Reference numeral 10 denotes a molded material supply pipe connected to the approximate center of the bottom surface of the concave mold 9 fixed to the mounting frame 7, and supplies the molded material such as ethylene beads, which is the raw material for the cushioning material 1, to each concave mold 9. Supply into the recess.

Reference numeral 11 denotes an extrusion pin, which is provided so as to be freely inserted through, for example, four insertion holes formed on the bottom surface of the negative concave mold 9, and is used to extrude the cushioning material 1 after molding.

Here, a molded material supply pipe 10, an extrusion pin 11, etc. are attached to the concave mold 9, but according to the present invention, there is no need to remove the concave mold 9 as described later. , there is no need for troublesome work such as attaching and removing the push-out pin 11 and the like.

The convex unit 4b is disposed opposite to the concave unit 4a so as to be able to approach and separate from it, and is connected to a single metal plate 12.
The mold mounting frame 14 is attached to the frame 13.

The mold mounting frame 14 is provided with four square holes 15 for mounting the mold.

The convex mold 16 is removably attached to the rectangular hole 15 by, for example, bolting, and a corresponding concave mold 9 is fitted thereto to form a mold space during molding.

Among the four square holes 15, the negative square hole (for example, two convex molds 17, 18 are attached by bolts, and each convex mold 17, 18 corresponds to Auxiliary plates 19,20 are interposed between the convex molds 17,18 and the mold mounting frame 14, respectively, so that they can be individually centered on the same concave mold 9.

In addition, when tightening bolts when installing the concave mold 9 and the convex mold 16, 17° 18, all the bolts used are constructed so that they can be inserted from the front side of the mounting frame 1° 14 for easy installation. .

For this reason, the wall thickness of the mounting frames 1 and 14 is sufficiently thin compared to conventional molding equipment, etc., so that a female screw of the length necessary for screwing the mounting frames 7 and 141 bolts can be screwed in. .

Convex molds 16, 17° 18 according to the shape of the cushioning material 1 to be molded are attached to the mounting frame 14 of the convex Uniso) 4a, and each convex mold 16, 17, 18 is replaced with a corresponding concave mold. 9
After centering each, convex unit) 4b
Move the whole to the left in FIG. 3A, and convex mold 16.1
7. is is fitted into the concave mold 9 as shown in FIG. 3B.

At this time, mold spaces 21 for filling the material to be molded are formed between the convex molds 16, 17, and 18 and the corresponding concave molds 9, respectively.

Next, a material to be molded, such as ethylene beads, is supplied to the mold space 21 via the material supply pipe 10 .

Then, the concave unibody 4a and the convex unibody 4b are heated using appropriate heating means, such as steam, to melt the material to be molded in the mold space 21.

Next, cooling water is supplied into the convex unit 4b through the cooling water supply pipe 22 provided inside the concave unit 4a and the convex unit 4b to cool the molded material in the mold space 21. Let it solidify.

Once the material to be molded has solidified to some extent, water cooling is stopped and the material is left to cool.

After cooling for a certain period of time, move on to mold cutting.

First, the convex unit 4b is separated from the concave unit 4a and returned to the position shown in FIG. Push to the right.

The cushioning material 1 molded as the extrusion pin 11 moves,
It is taken out of the concave mold 9.

Here, when molding the cushioning material 1 with different shapes,
For example, the convex mold 16 can be removed from the mounting frame 14, and another convex mold 16 that matches the shape of the cushioning material 1 to be molded can be attached to the mounting frame 14).

In that case, since the above-mentioned configuration device uses a common concave mold 9 regardless of the shape of the cushioning material 1, the concave mold 9 must be replaced every time the shape of the cushioning material 1 to be molded is changed. There's no need to worry about that (J).

Furthermore, instead of replacing all of the four convex molds attached to the mounting frame 14, it is also possible to replace some of them with other molds.

In this case, multiple types of cushioning materials having different shapes and dimensions can be simultaneously molded using the same molding apparatus.

In the above embodiment, the concave mold 9 provided on the concave unit 4a is fixed, and the convex molds 16, 17, 18, etc. on the convex unit 4bl are detachably attached. , conversely, the convex molds 16, 17, 18 are fixed to the convex unit node 4b, and the molded material supply pipe 10, extrusion pin 11, etc. are fixed thereto, and the concave mold 9 is can also be configured to be detachable from the concave unit 4a.

In this case, since the outer shape of the molded cushioning material is determined by the concave mold 9, the cushioning material is molded with a bottom shape corresponding to the size of the concave mold 9 used.

As described above, the cushioning material molding apparatus according to the present invention includes a convex mold, and a hollow square with a bottom that fits into the convex mold and serves as a mold for the cushioning material between the convex mold and the convex mold. It consists of a concave mold that forms a housing-like mold space, and the material to be molded is molded into a bottomed hollow rectangular housing, and after molding, it is vertically divided into at least four or more blocks, and each block is In an apparatus for molding a cushioning material distributed in a packaging box, the convex mold and the concave mold are attached to a mounting frame so that one mold is permanently attached and the other mold is replaceable, A material supply pipe for supplying the material to be molded into the mold space is connected to the permanently attached mold, and when changing the cushioning material to be molded, the other mold must be connected to the mold. Because it is configured to be replaced with another mold that matches the dimensions of the cushioning material and attached to the mounting frame,
Cushioning material can be standardized with the same bottom shape regardless of the size of the packaging box, and can be applied to packaging boxes of different sizes by simply changing the height of the cushioning material depending on the depth of the packaging box. Therefore, by creating a configuration in which the cushioning material is cut out and molded in the height direction, it is of course possible to mold using a common concave mold, and in this case, the concave mold is better. Attach the material supply pipe to be molded, fix the concave mold to the - mounting frame, and then attach the convex mold according to the type of cushioning material to be molded to the corresponding mounting frame. As a result, when molding cushioning materials of different heights, only the convex mold needs to be removed from the mounting frame; for example, when changing molds like in conventional molding equipment, the entire mold mounting frame must be replaced. Therefore, there is no need for a lot of work time, and since the number of molds is small, there is no need for a lot of equipment cost. It has the feature of being suitable for molding.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an example of a cushioning material that can be molded by the cushioning material molding apparatus of the present invention before longitudinal division;
The figure is a perspective view of the cushioning material vertically divided and stored in a packaging box, FIG. 3A. B is a vertical sectional view of one embodiment of the cushioning material molding apparatus according to the present invention, and FIG. 4 is a view taken along the line Y--Y in FIG. 3. 1...Buffer material, 1a to 1d...Block, 2 a t2b...Groove, 3...
Packaging box, 4... Cushioning material molding device, 7...
・Mold mounting frame, 9...Concave mold, 10...
...Molding material supply piping, 11...Extrusion pin,
14...Mold mounting frame, 16,17.18...
... Convex mold, 21 ... Mold space.

Claims (1)

[Claims] 1. A convex mold, and a concave mold that fits into the convex mold and forms a hollow rectangular housing-like mold space with a bottom that serves as a mold for a cushioning material between the convex mold and the convex mold. A cushioning material is molded from a material to be molded into a hollow rectangular casing with a bottom, and after molding, it is vertically divided into a plurality of blocks of at least four or more, and each block is distributed in a packaging box. In the device,
The convex mold and the concave mold are mounted on a mounting frame, with one mold being permanently attached and the other mold being replaceable, and the permanently attached mold is provided with a mold in the mold space. When a molded material supply pipe is connected to supply the mold material, and the cushioning material to be molded is to be changed, the other mold described above must be replaced with another mold that matches the dimensions of the cushioning material. A cushioning material molding device characterized by being configured to be attached to a mounting frame.