JPH06344458A - Method and apparatus for manufacturing cushioning material for package - Google Patents

Abstract

PURPOSE:To obviate the necessity of an adhering or fitting work and facilitate separation during recycling by partitioning a cavity into formation spaces for a cushioning pad and a non-formation space with the use of partition means being in contact with a supporting material provided on the cavity of a mold, following this, forming it integrally of the support material through foaming resin particles filled therein. CONSTITUTION:Both molds 10, 11 are clamped in the form of providing a cracking W between the female mold 10 and the male mold 11, and a support material 92 is secured by the support material securing plates 21, 21 of securing device 20, 20. As a result, the cavity 12 is partitioned into formation spaces 12a, 12a and a non-formation space 12b. Subsequently, a specific quantity of resin particles for cushioning pads 91, 91 are fed from a feeder in order to be charged into the formation spaces 12a, 12a. As a consequence of this process, the cushioning pads 91, 91 and support material 92 are formed integrally of each other, and the resin particles are heated and fused only in the formation spaces 12a, 12a so as to be a foam beads molding, and the non-formation space 12b has no foam beads molding formed therein.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing a cushioning material for packaging used for packaging, for example, packages of electric appliances and parts thereof.

[0002]

2. Description of the Related Art Conventionally, when packing various electric appliances such as radio equipment, audio equipment, air conditioners, television receivers, electric refrigerators and the like, or parts thereof, or packages of other products, foaming is required. A cushioning material for packaging (hereinafter referred to as a cushioning material) made of a resin molding or the like is used. The above-mentioned cushioning material is formed by dividing each corner of the bottom and the top of the package in order to reduce the amount of resin used and facilitate handling and processing after use.
Generally, it is used as a buffer pad such as a corner pad.

However, if the cushioning material is divided and formed at each corner in this way, the number of cushioning pads used when packaging the package is increased, and the workability at the time of packaging is reduced. Therefore, as disclosed in, for example, Japanese Utility Model Publication No. 56-175478, usually, a plurality of cushioning pads are attached to a fixing board such as a corrugated board or a paperboard with an adhesive agent or an adhesive tape to facilitate handling. It is used as a cushioning material.

On the other hand, foamed resin moldings are often reused or reused as recycled resources (hereinafter simply referred to as "reuse") in view of the difficulty of processing and resource saving. In addition, in recent years, based on the Act on Promotion of Utilization of Recycled Resources (Act No. 48 / Article 13 of 1991),
In order to promote the utilization of the foamed resin molded body as a recycled resource, it is specified to facilitate the separation of the foamed resin molded body and the dissimilar material (Ministry of International Trade and Industry Order No. 55, 1991).
That is, in the above-mentioned cushioning material, it is strongly required to devise so that the cushioning pad can be easily separated from the mount. When foreign matter is mixed in the foamed resin to be reused, the quality of the reused product is deteriorated, such as the strength thereof is reduced.

[0005]

However, in the above-mentioned conventional cushioning material, since the cushioning pad made of the foamed resin molded body is adhered to the fixing mount such as the corrugated board or the paperboard with the adhesive or the adhesive tape. However, the cushioning material itself has a low productivity, and the cushioning material has a drawback of high cost. Also,
The above-mentioned conventional cushioning material is difficult to separate from the mount of the cushioning pad after use, and requires extremely troublesome separation work, and the other material or adhesive to the separated cushioning pad or mount, Since the adhesive tape or the like is easily mixed as a foreign substance, there is a problem that it is difficult to reuse.

Further, in order to simplify the above separating work, there has been proposed a cushioning material which is mounted and fixed on the mount by fitting a cushion pad into a notch provided on the mount (Actual Publication 58-58). No. 26940), however, this cushioning material also has the drawback that the cushioning material itself has low productivity, and the cushioning pad may fall off the mount and the cost of the cushioning material becomes high, like the conventional cushioning material. is doing.

The present invention has been made in view of the above problems, and an object thereof is to easily and surely support a cushioning pad on a support member without requiring troublesome bonding work and fitting work. To provide a manufacturing method and a manufacturing apparatus of a cushioning material for packaging, which can maintain a good supporting state at the time of use and can easily separate the cushioning pad from the support material at the time of reuse after use. is there. That is, the present invention is a manufacturing method and a manufacturing method for efficiently and inexpensively manufacturing the packaging cushioning material that the present inventor has already applied for as Japanese Patent Application No. 4-166269 as a solution to the above problems. To provide a device.

[0008]

In order to solve the above-mentioned problems, a method of manufacturing a cushioning material for packaging according to the present invention supports a cushioning pad made of a foamed resin molded body and the cushioning pad. A manufacturing method for manufacturing a cushioning material for packaging comprising a support material, wherein the support material is placed in a cavity of a molding die, and the cushioning pad molds the cavity by a partitioning means abutting against the support material. After being divided into a molding space to be formed and a non-molding space other than that, the foaming resin and the support material are integrally molded by filling the above-mentioned molding space with foamable resin particles for foaming. I am trying.

In order to solve the above-mentioned problems, the apparatus for manufacturing a cushioning material for packaging according to a second aspect of the present invention is a package provided with a cushioning pad made of a foamed resin molded body and a support material for supporting the cushioning pad. A manufacturing apparatus for manufacturing a cushioning material for use in molding, which comprises abutting against the above-mentioned supporting material arranged in a cavity of a molding die to integrally mold the cavity with a foamed resin serving as a cushioning pad and the supporting material. It is characterized in that it is provided with partitioning means for partitioning the space into a non-molding space other than the space.

According to a third aspect of the present invention, there is provided an apparatus for manufacturing a cushioning material for packaging in order to solve the above problems, in the apparatus for producing a cushioning material for packaging according to the second aspect, the partition means is a molding die. It is characterized in that it is provided on the moving mold side.

[0011]

According to the method of claim 1, after partitioning the cavity of the molding die by the partitioning means which is in contact with the support material, the molding space for molding the buffer pad and the other non-molding space are partitioned. The foamed resin and the support material are integrally molded by filling the above-mentioned molding space with the foamable resin particles and foaming them. Therefore, the expandable resin particles are heated and fused only in the molding space to form a foamed resin molded body, and the foamed resin molded body is not formed in the non-molded space.

This eliminates the need for a finishing process for removing burrs, and allows the buffer pad of a desired shape to be easily and surely supported by the support material. Further, the cushioning material for packaging can be efficiently and inexpensively manufactured without requiring a troublesome bonding work or fitting work. still,
The cushioning material for packaging manufactured by the above manufacturing method can maintain a good supporting state during use, is easy to handle during packaging and unpacking, and supports the cushioning pad when reusing after use. Can be easily separated from.

According to the second aspect of the present invention, a molding space that abuts against the supporting material and integrally molds the cavity of the molding die with the foamed resin to serve as the cushioning pad and the supporting material, and other than that. It has a partitioning means for partitioning it into a non-molding space.
Therefore, the foamed resin molded body is heated and fused only in the molding space and molded integrally with the support material, and is not formed in the non-molded space.

This eliminates the need for a finishing process for removing burrs, and allows the buffer pad of a desired shape to be easily and reliably supported by the support material. Further, the cushioning material for packaging can be efficiently and inexpensively manufactured without requiring a troublesome bonding work or fitting work. still,
The cushioning material for packaging manufactured by the above-mentioned manufacturing equipment can maintain a good supporting state during use, is easy to handle during packaging and unpacking, and supports the cushioning pad when reusing after use. Can be easily separated from.

According to the third aspect of the present invention, since the partition means is provided on the movable die side of the molding die, the cavity of the molding die is further defined by the molding space and the non-molding space. It can be reliably partitioned.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIGS.
The explanation is based on the following.

First, a packing cushioning material manufactured by the packing cushioning material manufacturing apparatus according to this embodiment will be described. As shown in FIGS. 8 and 9, a cushioning material for packaging (hereinafter referred to as a cushioning material) 90 includes a cushioning pad 91 and 91 formed by molding synthetic resin foam beads, and these cushioning pads 91 and 91. Supporting plate-shaped support member 92
It consists of The cushioning pad 91 is formed such that a front portion 93 and a back portion 94, which are foamed bead molded bodies (foamed resin molded bodies), are partially continuous with each other so that the corner portions of the support material 92 are sandwiched. The support member 92 is provided with cutout holes 92a in the vicinity of its corners, and the front and back portions 9 of the buffer pad 91 continuous at the cutout holes 92a.
It is attached by 3.94. The cutout hole 92a is formed at a position corresponding to the supply hole 13a of the raw material filler 13 in the manufacturing apparatus described later.

As the resin material constituting the above-mentioned buffer pad 91, a homopolymer of styrene or methylstyrene, and a polystyrene resin such as styrene-maleic anhydride, styrene-acrylonitrile, or styrene-methylmethacrylate copolymer, ethylene. Or a homopolymer of propylene, and a polyolefin resin such as ethylene-propylene and ethylene-vinyl acetate copolymer, a styrene-modified resin obtained by polymerizing a styrene monomer on the polyolefin resin, and a polymethylmethacrylate resin. Resins or other synthetic resins that can be foamed bead molded and have appropriate strength and buffering properties when formed into foamed bead molded products can be used.

Further, the cushioning pad 91 of the cushioning material 90 is used.
Each of them may be made of a different resin material depending on the form of the packaged object. As the different types of resin materials, those having different prefoaming ratios, resin materials, particle sizes, etc.,
Alternatively, one of the resin materials to which an additive or a coloring agent is added may be used.

The foamed bead molding is usually performed by temporarily pre-expanding expandable resin particles obtained by adding a foaming agent such as butane / pentane to the resin particles to a predetermined expansion ratio, and then performing the preliminary expansion. Resin particles (hereinafter, simply referred to as resin particles) are filled in a cavity of a molding die, and heated and expanded by a heating medium such as steam to mold a foamed bead molding.

As the material forming the support member 92, paper materials such as corrugated board, paperboard, corrugated paperboard and paperboard treated with synthetic resin, board materials such as veneer board, fiber reinforced synthetic resin board, foam and Non-foam synthetic resin plate,
A corrugated cardboard made of a synthetic resin, a thin metal plate, or another plate-shaped body having an appropriate strength can be used, and a material made of a reusable or recyclable material is particularly preferable. The shape of the support material 92 is not limited to a flat plate shape, and may be various three-dimensional shapes according to, for example, the form of the packaged object, etc. within a range that does not hinder the foaming bead molding. it can.

Since the buffer pad 91 is engaged with the cutout hole 92a portion of the support member 92, it does not fall off from the support member 92 during use and is properly held in a predetermined clinging state. . Further, the front portion 93 and the back portion 94 of the cushioning pad 91 are continuous only in the cutout hole 92a portion, the continuous portion 91a has a small cross-sectional area, and the cushioning pad 91 is a foamed bead molded body. It is possible to break easily. Moreover, since the buffer pad 91 and the support member 92 are integrally molded and no adhesive or the like is used, the buffer pad 91 and the support member 92 can be easily separated. Therefore, the cushioning material 90 is easy to handle in packing and unpacking work, and after the cushioning material 90 is used, the cushioning material 90 is separated (or twisted) by the front and back portions 93 and 94 of the cushioning pad 91, for example, manually. By applying an external force such as tearing, the front and back portions 93 and 94 are divided by the continuous portion 91a, and the cushioning pad 91 and the support material 92 can be easily separated.

The apparatus for manufacturing the cushioning material for packaging according to this embodiment molds the cushioning material 90 by the so-called outsert molding method. As shown in FIG. 1, the above-mentioned manufacturing apparatus is designed to laterally open the mold, and includes a female frame 2 and a male frame 3 at predetermined positions of the device frames 1a and 1b facing each other. . A female back plate 4 and a male back plate 5 are fixed to predetermined positions of the female frame 2 and the male frame 3, respectively. A female die 10 and a male die 11, which are molding dies, are attached to the female die frame 2 and the male die frame 3 via inner plates 6 and 6, respectively, and as shown in FIG. When the male mold 11 is closed, a cavity 12 which is a molding space for the cushioning material 90 is formed between the female mold 10 and the male mold 11.

In the portions of the female mold 10 and the male mold 11 which face the cavities 12, a large number of vapor holes (not shown) are formed, each of which allows water vapor to pass therethrough but resin particles not to pass therethrough. ing. Further, inside the female frame 2 and inside the male frame 3, a female mold 10 and a male mold 11 are provided.
Steam chambers 7a and 7b for heating are respectively formed. Further, the apparatus frame 1b to which the male mold 11 is attached is movable by the hydraulic cylinder 8 in a mold closing direction (left direction in FIG. 1) and a mold opening direction (right direction in FIG. 1). Therefore, the male die 11 is a moving die.

A raw material filling device (hereinafter referred to as a feeder) 13, 13 for filling the cavity 12 with resin particles so as to penetrate the female mold 10 and the female back plate 4 is provided in the female mold 10. Eject pins 14 are provided to push out the cushioning material 90, which is a foamed bead molded body. The feeders 13 may be filled with resin particles made of the same resin material, or may be filled with resin particles made of different resin materials.

As shown in FIG. 5, each eject pin 14
The tip end portion 14a is located on substantially the same plane as the die surface 10a, which is a portion of the female die 10 for forming the buffer pad 91. In addition, the supply hole 13a of each feeder 13 is provided substantially at the center of the mold surface 10a. And
As described above, the cutout hole 92a of the support member 92 in the cushioning member 90 is provided at a position corresponding to the supply hole 13a of the feeder 13. Therefore, as shown in FIG.
When the support member 92 is arranged on the female mold 10, the feeder 13
The resin particles filled from the supply holes 13a of the
It is also supplied to the surface side of the support material 92 (that is, the side where the front portion 93 of the buffer pad 91 is formed) through the cutout hole 92a. The feeder 13 may be provided on the male die 11 side.

Further, on the mold surface 10b, which is a portion of the female die 10 where the support material 92 is arranged, pins 10c ... Which are locked at a predetermined position by piercing the support material 92 are provided. These pins 10c ... Have a length (for example, about 4 mm) approximately equal to the thickness of the support member 92. The arrangement method for arranging the support material 92 on the mold surface 10b, that is, the supply method for supplying the support material 92 to the manufacturing apparatus is not particularly limited.

As shown in FIGS. 2 and 3, fixing devices 20 and 20 for fixing the support material 92 of the cushioning material 90 at a predetermined position in the cavity 12 are provided at predetermined positions of the male mold 11.
Is provided. As shown in FIG. 4, these fixing devices 20 include a support material fixing plate 21, a shaft 22, a spring 23,
It is composed of a shaft length adjusting nut 24, a guide 25, and a guide length adjusting nut 26, and is housed in the fixing device mounting hole 17 of the male die 11.

The cylindrical guide 25 is provided with a hole 25b into which the shaft 22 can be inserted, and has a male screw 25 on its outer peripheral surface.
a is formed. On the other hand, the male die 11 is formed with a female screw 11a corresponding to the male screw 25a of the guide 25, and the guide 25 is screwed to the male die 11. Also,
A guide length adjusting nut 26 is also screwed to the guide 25. By appropriately changing the screwing position of the guide length adjusting nut 26, the length of the guide 25 protruding to the fixing device mounting hole 17 side can be adjusted. It is supposed to be adjusted.

The cylindrical shaft 22 is slidably inserted into the hole 25b of the guide 25, and the support material fixing plate 21 is fixed to the tip end portion thereof. Further, the shaft 22 is
A male screw 22a is formed on the outer peripheral surface of the terminal portion, and a shaft length adjusting nut 24 is screwed onto the male screw 22a. Then, by appropriately changing the screwing position of the shaft length adjusting nut 24, the length of the shaft 22 protruding toward the fixing device mounting hole 17 side is adjusted.

The support material fixing plate (partitioning means) 21 is shown in FIG.
As shown in Fig. 3, it has a rectangular parallelepiped shape and its side surface 2
1a is a sliding surface 17 of the fixing device mounting hole 17 of the male mold 11.
In the state of being in close contact with a, the direction A ₁ that is the direction protruding from the fixing device mounting hole 17 and the direction A ₂ that is the opposite direction.
It is slidable in any direction.

The springs 23 are inserted in the shaft 22, and both ends of the springs 23 are respectively formed on the back surface 21 of the support material fixing plate 21.
b and the bottom surface 25c of the guide 25. For this reason, the spring 23 constantly urges the support material fixing plate 21 in the A ₁ direction, but the shaft length adjusting nut 24 abuts the upper surface 25d of the guide 25, so that the support material fixing plate 2
1 is held in a state of protruding by a predetermined amount from the fixing device mounting hole 17, so that the entire support material fixing plate 21 does not fall off from the fixing device mounting hole 17.

The spring force of the spring 23 and the protruding amount of the support material fixing plate 21 are adjusted by adjusting the length of the guide 25 or the shaft 22 protruding toward the fixing device mounting hole 17 side with the adjusting nuts 24 and 26. It is supposed to be changed in. Thereby, the front surface 21c of the support material fixing plate 21
Touches the support member 92 of the cushioning member 90 and fixes the support member 92 with an appropriate spring force. The support material fixing plate 21 does not crush the support material 92 when the female die 10 and the male die 11 are closed.

The support material fixing plate 21 slides in the A ₂ direction so that the back surface 21 b is the standing surface 17 of the fixing device mounting hole 17.
The front surface 21c is the mold surface 1 of the male mold 11 when it comes into contact with b.
It is configured to form substantially the same plane as 1b. Also,
As shown in FIG. 3, when the cavity 12 is filled with resin particles, a cracking W having a width of about 1 mm is provided between the female die 10 and the male die 11 in order to allow the air in the cavity 12 to escape. The material fixing plate 21 can fix the support material 92 of the cushioning material 90 with the cracking W provided.

The portion of the side surface 21a of the support material fixing plate 21 projecting from the mold surface 11b of the male mold 11 in the A ₁ direction serves as the partition wall 30, and as shown in FIG. Molding space 12 for molding 91
It is designed to be partitioned into a and the other non-molding space 12b. As a result, it is possible to prevent resin leakage in the cavity 12 during molding from the molding spaces 12a and 12a for molding the buffer pads 91 and 91 to the non-molding space 12b. That is, the expansion pressure during foam molding prevents the heat-softened resin from protruding from the gap to generate burrs, and as a result, a finishing process for removing the burrs becomes unnecessary. The support material fixing plate 21 may have any shape as long as it can prevent resin leakage during molding.
The width, length, etc. are not particularly limited.

A method of manufacturing the cushioning material 90 by the manufacturing apparatus having the above structure will be described below with reference to FIGS. 10 and 11.

First, as shown in FIG. 10A, the female mold 1
0 and the male mold 11 are opened to adjust the spring force of the spring 23 of the fixing device 20/20 and the protrusion amount of the support material fixing plates 21/21, and then the support material 92 is fixed to the cavity 1 of the female mold 10.
It is locked at a predetermined position in step 2 (step 1). Next, as shown in FIG. 3B, both molds 10 and 11 are closed with a cracking W provided between the female mold 10 and the male mold 11, and a supporting material for the fixing devices 20 and 20 is provided. Fixed plate 21, 21
The support material 92 is fixed by (step 2). This allows
The cavity 12 is partitioned into molding spaces 12a and 12a and a non-molding space 12b. Then, the feeder 13
Then, a predetermined amount of resin particles to be the buffer pads 91, 91 are supplied to fill the molding spaces 12a, 12a (step 3).

Thereafter, as shown in FIG.
0 and male mold 11 are closed (step 4), and steam chamber 7a
The female mold 10 and the male mold 11 are heated by passing water vapor through 7b and brought to a predetermined temperature, for example, for 6 seconds (step 5). Next, only the male mold 11 is kept at a predetermined temperature for, for example, 3 seconds to foam the resin particles (step 6), and then the female mold 10 and the male mold 11 are kept at a predetermined temperature, for example, for 12 seconds (step 7), The resin particles are sufficiently heated and foamed to be fused to each other (step 8).

Since the side wall 21a of the support material fixing plate 21 protruding from the mold surface 11b of the male mold 11 becomes the partition wall 30, the non-molding space 12b is filled with the resin particles in the above step 3. There is no fear. In addition, the above steps 6 to
In step 8, the resin particles are heated and fused only in the molding spaces 12a and 12a.

Next, cooling water is passed through the steam chambers 7a and 7b,
The female mold 10 and the male mold 11 are cooled to a predetermined temperature, for example, for 3 seconds (step 9), and are left to cool, for example, for 100 seconds (step 10). After that, as shown in FIG. 11A, the female mold 10 and the male mold 11 are opened (step 1
1), as shown in FIG. 2B, the cushioning material 90 is pressed out by the eject pins 14 ... And taken out (step 12). The cushioning material 90 obtained as described above is the cushioning pad 91.
The resin particles of 91 can be fused well with each other.

In the manufacturing apparatus having the above structure, the cavity 12 is brought into contact with the supporting member 92 of the cushioning member 90 to form the molding space 12a.
A support material fixing plate 21 is provided to partition the space 2a and the non-molding space 12b. After the cavities 12 are partitioned as described above, the molding spaces 12a, 12a are filled with resin particles and foamed to form the cushioning pads 91, 91 and the support member 9.
2 and 1 are molded integrally. For this reason, the resin particles are heated and fused only in the molding spaces 12a and 12a to form foamed bead moldings, and do not form foamed bead moldings in the non-molding space 12b.

As a result, the buffer pad 91 having a desired shape is obtained.
-91 can be easily and reliably supported by the support member 92. Further, the cushioning material 90 can be manufactured efficiently and inexpensively without requiring a troublesome bonding work or fitting work.

In the above embodiment, the fixing device 2
The amount of protrusion of the support material fixing plate 21 of 0 is adjusted by the adjusting nuts 24 and 26 screwed to the guide 25 and the shaft 22.
As shown in FIG. 12, instead of adjusting by 6, the stopper of the support material fixing plate 21 may be provided in the female mold 10 or the male mold 11 to adjust the protrusion amount of the support material fixing plate 21.

That is, as shown in FIG. 12 (a), the male mold 1
1, the stoppers 17e and 17e are formed at predetermined positions on the sliding surface 17a of the fixing device mounting hole 17, while the stopper 17 on the side surface 21a of the support material fixing plate 21 is provided.
The collar portion 21e is provided at a position corresponding to e. This allows
The collar portion 21e of the support material fixing plate 21 abuts the stopper 17e when it slides in the A ₁ direction by a predetermined amount, and is locked in a state where the partition wall 30 having a predetermined height is formed. Therefore, the support material fixing plate 21 does not crush the support material 92 when the female die 10 and the male die 11 are closed. Of course,
The amount of protrusion of the support material fixing plate 21 is adjusted by the stopper 17e.
The locking by 17e and the adjustment by each adjusting nut 24, 26 may be used together.

Further, as shown in FIG.
On both sides of the mold surface 10b in
0e may be formed so that when the support material fixing plate 21 slides in the A ₁ direction by a predetermined amount, the front surface 21c of the support material fixing plate 21 contacts the stoppers 10e and 10e. Also in this case, the support material fixing plate 21 does not crush the support material 92 when the female die 10 and the male die 11 are closed. Of course, the amount of protrusion of the support material fixing plate 21 may be adjusted by using both the stoppers 10e and 10e and the adjustment nuts 24 and 26.

In the above embodiment, the support member fixing plate 21 of the fixing device 20 is biased in the A ₁ direction by the spring 23 passed through the shaft 22. Instead of urging the fixing plate 21, as shown in FIG. 13, an air cylinder 40 for sliding the shaft 22 in the A ₁ -A ₂ direction by air pressure is attached to the end of the shaft 22 and supported by the air cylinder 40. The material fixing plate 21 may be biased in the A ₁ direction. In this case, the protrusion amount of the support material fixing plate 21 can be easily changed by adjusting the air pressure.

Further, in the above embodiment, the female mold 1
0 is provided with pins 10c ... On the mold surface 10b, and the support member 92 is locked at a predetermined position by these pins 10c. Instead, as shown in FIG.
At a predetermined position of 0, a suction pipe 50 ... Connected to a decompression device such as a vacuum pump is attached, and the support member 92 is sucked by engaging the opening of the suction pipe 50. You may stop. Of course, pin 10c ...
It is also possible to use the suction pipe 50 and the suction pipe 50 together.

Moreover, in the above embodiment, the male mold 1
Although the fixing device 20, 20 is provided on the first side, if the width of the cracking W provided when the cavity 12 is filled with the resin particles is narrow enough to be ignored,
Alternatively, when the cracking W is not provided, instead of the fixing devices 20 and 20, as shown in FIG.
You may provide the fixing device 60 * 60 as a partition means at the side.

That is, as shown in FIG.
By providing the fixing device 60/60 on the mold surface 10b of the above, the fixing device 60 portion projecting from the mold surface 10b of the female mold 10 to the male mold 11 side becomes the partition wall 60a, and FIG.
As shown in FIG.
It can be divided into a and the non-molding space 12b. As a result, like the support material fixing plate 21 of the fixing device 20 in the above embodiment, the molding space 12 in the cavity 12 is formed.
It is possible to prevent resin leakage during molding from a.12a to the non-molding space 12b.

In the above description, the manufacturing apparatus for laterally opening the female mold 10 and the male mold 11 has been described as an example, but the mold opening direction of the manufacturing apparatus is limited to the lateral direction. However, the female mold 10 and the male mold 11 may be opened in the vertical direction. In this case, by arranging the female mold 10 on the lower side and the male mold 11 on the upper side, the supporting member 92 can be placed on the mold surface 10b of the female mold 10. When the shape of the support material 92 is formed to be substantially the same as the shape of the cavity 12, the support material 92 can be locked only by placing it on the mold surface 10b.
The locking pins 10c ... and the suction tube 50 ... Can be omitted.

Also, in the above description, the support member 92
The case where the cushioning material 90 in which the two cushioning pads 91 are supported is described as an example.
The number of buffer pads 91 supported by 2 is not particularly limited. Furthermore, the shape of the cushioning material 90, that is, the shapes of the support material 92 and the cushioning pad 91, and the cushioning pad 91.
The supporting position and the number and shape of the cutout holes 92a of the support material are not particularly limited.

[0052]

As described above, in the method for manufacturing the cushioning material for packaging according to the first aspect of the present invention, as described above, the supporting member is arranged in the cavity of the molding die, and the partitioning means for contacting the supporting member is used. The cavity is divided into a molding space in which the cushioning pad is molded and a non-molding space other than that, and then the above-mentioned molding space is filled with foamable resin particles and foamed so that the foamed resin and the support material are integrated. It is a method of forming.

Therefore, the expandable resin particles are heated and fused only in the molding space to form a foamed resin molded body, and the foamed resin molded body is not formed in the non-molded space. This eliminates the need for a finishing process for removing burrs, and allows the buffer pad having a desired shape to be easily and reliably supported by the support material. Further, there is an effect that the cushioning material for packaging can be efficiently and inexpensively manufactured without requiring a troublesome bonding work and a fitting work.

The packing cushioning material manufactured by the above manufacturing method can maintain a good supporting state during use, is easy to handle during packing and unpacking, and is reusable after use. The cushioning pad can be easily separated from the support material.

As described above, the apparatus for manufacturing the cushioning material for packaging according to the second aspect of the present invention is in contact with the supporting material arranged in the cavity of the molding die, and the cavity serves as a foamed resin which serves as a cushioning pad. This is a configuration including partitioning means for partitioning a molding space for integrally molding the mold and the support material into a non-molding space other than the molding space.

Therefore, the foamed resin molded body is heated and fused only in the molding space to be molded integrally with the support material, and is not formed in the non-molded space. This eliminates the need for a finishing process for removing burrs, and allows the buffer pad having a desired shape to be easily and reliably supported by the support material. Further, there is an effect that the cushioning material for packaging can be efficiently and inexpensively manufactured without requiring a troublesome bonding work and a fitting work.

The cushioning material for packaging manufactured by the above manufacturing apparatus can maintain a good supporting state during use, is easy to handle during packing and unpacking, and is reusable after use. The cushioning pad can be easily separated from the support material.

As described above, the apparatus for manufacturing the cushioning material for packaging according to the third aspect of the present invention is configured such that the partition means is provided on the moving die side of the molding die.

As a result, the cavity of the molding die is
It is possible to more reliably partition the molding space and the non-molding space.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a schematic configuration of a manufacturing apparatus according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a configuration of a main part of the manufacturing apparatus.

FIG. 3 is a cross-sectional view showing a configuration of a main part of the above-mentioned manufacturing apparatus and showing a state in which the mold is closed.

FIG. 4 is a cross-sectional view showing a configuration of a fixing device in the above manufacturing apparatus.

FIG. 5 is a front view of a female mold in the above manufacturing apparatus.

6 is a front view showing a state in which a support member is locked to the female die of FIG.

FIG. 7 is a front view of a male mold in the above manufacturing apparatus.

FIG. 8 is a perspective view of a cushioning material.

FIG. 9 is a cross-sectional view of a main part of the cushioning material.

FIG. 10 is an explanatory view showing a part of the manufacturing process of the cushioning material.

FIG. 11 is an explanatory diagram showing a part of the manufacturing process of the cushioning material.

FIG. 12 is a cross-sectional view showing another configuration of the fixing device.

FIG. 13 is a cross-sectional view showing still another configuration of the fixing device.

FIG. 14 is a cross-sectional view showing another configuration of the female die.

FIG. 15 is a cross-sectional view showing still another configuration of the fixing device.

[Explanation of symbols]

 10 Female Mold (Molding Mold) 10a ・ 10b Mold Surface 10c Pin 10e Stopper 11 Male Mold (Molding Mold, Moving Mold) 12 Cavity 12a Molding Space 12b Non-Molding Space 13 Feeder 14 Eject Pin 17e Stopper 20 Fixed Device 21 Support material fixing plate (partitioning means) 23 Spring 30 Partition wall 40 Air cylinder 50 Suction pipe 60 Fixing device (partitioning means) 60a Partition wall 90 Buffer material for packaging 91 Buffer pad 92 Support material

(72) Inventor Tetsuo Wada 4-3-1 Tsunashima Higashi, Kohoku-ku, Yokohama-shi, Kanagawa Matsushita Communication Industrial Co., Ltd. (72) Yutaka Kawasaki 4-cuna Tsunashima-east, Kohoku-ku, Yokohama No. 1 in Matsushita Communication Industry Co., Ltd. (72) Inventor Yasuo Maruyama 4-3 Tsunashima Higashi, Kohoku Ward, Yokohama City, Kanagawa Prefecture Matsushita Communication Industry Co., Ltd. (72) Inventor Masao Harao Sanwa 129-, Furukawa City, Ibaraki Prefecture 1 (72) Inventor Tatsuya Eguchi 20-18-203 Shizu-cho, Koga-shi, Ibaraki Prefecture (72) Inventor Ichiro Horiyama 1266 Shimobemi, Sowa-machi, Sarushima-gun, Ibaraki Prefecture

Claims (3)

[Claims] 1. A manufacturing method for manufacturing a cushioning material for packaging comprising a cushioning pad made of a foamed resin molded body and a supporting material for supporting the cushioning pad, wherein the supporting material is a cavity of a molding die. , And the partitioning means abutting against the support material divides the cavity into a molding space in which the buffer pad is molded and a non-molding space other than that, and then the molding space is filled with expandable resin particles. And a foaming resin and a support material are integrally molded by foaming. 2. A manufacturing apparatus for manufacturing a cushioning material for packaging, which comprises a cushioning pad made of a foamed resin molded body and a support material for supporting the cushioning pad, wherein the cushioning pad is arranged in a cavity of a molding die. And a partitioning means that abuts against the supporting material and partitions the cavity into a molding space for integrally molding the foamed resin that serves as a cushioning pad and the supporting material, and a non-molding space other than the molding space. Equipment for manufacturing cushioning materials for packaging. 3. The manufacturing apparatus according to claim 2, wherein the partition means is provided on the moving die side of the molding die.