JPS5854980Y2 - Cushioning sheet manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an apparatus for manufacturing a cushioning sheet having a large number of protrusions forming independent air chambers.

A cushioning sheet 1 having a large number of protrusions forming independent air chambers is made by placing a flat pack film 4 on the back side of an embossed film 3 having a large number of protrusions 2, as shown in FIG. By gluing them together, independent air chambers 5 are formed between the protrusions 2 of the embossed film 3 and the pack film 4.

Conventionally, when manufacturing the cushioning sheet 1, an embossed cylinder having a large number of independent depressions on the surface and connected to a vacuum device through the bottom of each depression was used. As shown in Publication No. 13782, etc., the emboss cylinder has a complicatedly machined hole for depressurization inside the cylinder, so the emboss cylinder has a complex structure, is difficult to manufacture, and is expensive. was.

In addition, because the structure is complex and difficult to manufacture, only small-diameter embossed cylinders have been manufactured, and it is necessary to form the embossed film in an extremely short time.It is also difficult to control the temperature by heating the film, making it difficult to operate. was difficult.

This invention uses an embossed cylinder that eliminates these drawbacks to ensure that cushioning sheets can be manufactured easily.

For this purpose, in this invention, an emboss cylinder is rotatably mounted on which a flat film is wrapped and an emboss film having a large number of protrusions is formed by external heating and internal vacuum suction. A cushioning sheet manufacturing device is provided that can press a flat pack film onto the outer surface of an embossed film to form a cushioning sheet and then peel it off.The crimping roll can be pressed against an embossing cylinder, and the embossed cylinder is It has a cylindrical shape with side plates on both sides in the direction, and the inside is divided by a number of partition plates provided in the circumferential direction to form a number of first chambers. A thin plate having a large number of small holes is attached to a cylindrical inner peripheral surface provided with through holes, and a hole is provided in the side plate of each first chamber of the embossing cylinder, and a second chamber communicating with each hole is formed. A fixing box with Except for the second chamber of the fixed box corresponding to the adhesive sheet stripping position, second chambers at other positions were connected to a vacuum device.

Next, this invention will be explained with reference to embodiments shown in the drawings.

In FIGS. 2 and 3, numeral 6 denotes a heating device which can be opened and closed vertically with a hinge 7, and the temperature can be adjusted using, for example, electric heating resistance, infrared rays, or hot air.

In the closed heating device 6, an embossing cylinder 8 was provided integrally with a rotary shaft 9 so as to be freely rotatable.

21 is a chain wheel connected to an electric motor (not shown);
22 is a bearing for supporting the rotating shaft 9.

The embossing cylinder 8 has side plates 11 on both sides in the axial direction.
The outer peripheral wall 12 of the embossed cylinder 8 is made into a cylindrical shape with
As shown in FIG. 4, a thin plate 16 having a large number of small holes 15 was attached to the entire inner circumference of a cylindrical plate 14 having a large number of independent through holes 13.

Then, a thin plate 16 having a through hole 13 and a large number of small holes 15
In order to obtain a predetermined cylindrical plate 14 with a large number of recesses 13a formed therein, a large number of through holes 13 may be made in a flat iron plate, and then this may be processed into a cylindrical shape by bending.

As the thin plate 16 having a large number of small holes 15, for example, a thin iron plate having a large number of small holes 15 having a diameter of about 1 mm at predetermined intervals is used.

The surface of the embossing cylinder 8 and the inner surface of the through hole 13 may be coated or applied with a material with good mold releasability, such as silicone or fluorine, or the outer peripheral wall 12 itself may be coated with a material that has good mold release properties. It may be made of a material with good quality.

One side plate 11 of the embossing cylinder 8 is provided with a large number of holes 17 on the same circumference.
a fixing box 18 having a second chamber communicating with each hole 17 of 1;
It was provided in close contact with the side plate 11 of the embossing cylinder 8, and the second chamber of the fixing box 18 was connected to the vacuum device 30.

In that case, the inside of the embossing cylinder 8 is divided into many parts in the circumferential direction by partition plates 20, and at least one hole 17 is provided in the side plate 11 of each first chamber of the embossing cylinder 8, and the side plate of the embossing cylinder 8 is The inside of the fixing box 18 provided in close contact with the embossed cylinder 11 is also divided into multiple parts by partition plates 19 in the circumferential direction, and the fixing box 1 corresponds to the product removal position, which is the peeling position of the cushioning sheet 1 on the outer peripheral surface of the embossing cylinder 8.
The second chamber of the fixed box 18 other than the second chamber of 8 is connected to the vacuum device 30, and only near this product extraction position,
Make sure that the pressure does not decrease from inside the embossing cylinder 8,
The product can be easily peeled off from the surface of the embossing cylinder 8.

The angle formed by the adjacent partition plates 19 and the adjacent partition plates 20 is such that the point where the film 24 contacts the surface of the embossing cylinder 8 and the point where the cushioning sheet 1 is peeled off from the surface of the embossing cylinder 8 are The angle is approximately the same as the angle made with respect to the center of rotation, and only two of the many chambers in the fixed box 18 are not connected to the vacuum device 30.

The reason why the inside of the embossing cylinder 8 is divided by multiple partition plates 20 provided in the circumferential direction is that only the product take-out position is not always connected to the vacuum device 30, and only other positions are connected to the vacuum device 30. This is to prevent the embossing cylinder 8 from being deformed even when the pressure roll 28 is strongly pressed against the outer circumferential surface of the embossing cylinder 8 in order to always connect the pack film 4 to the embossing film 3.

In FIG. 2, 23 is a roll wrapped around a flat film 24 for forming the embossed film 3 having a large number of protrusions 2, 25 is a guide roll for the film 24, and 26
2 is a guide piece for supplying the film 24 to the surface of the embossing cylinder 8; 27 is a roll around which the flat pack film 4 is wound; and 28 is a crimping roll provided at the product take-out position on the outer peripheral surface of the embossing cylinder 8. The pack film 4 can be superimposed and pressed onto the flat part of the engesu film 3 on the surface of the embossing cylinder 8.

The crimping roll 28 is movable from the position shown by the solid line to the position shown by the two-dot chain line so that the film 24 can be easily wrapped around the embossing cynonda 8.

29 is a stopper. The film 24 and the pack film 4 are pulled and moved in the direction shown by the arrow, and the product, the cushioning sheet 1, is pulled and taken out in the direction shown by the arrow.

The crimping roll 28 may be made of a material with good mold release properties, or may be coated with a material with good mold release properties, or may be coated with a material with good mold release properties.
You can also apply it.

When manufacturing the cushioning sheet 1, the roll 23 is applied to the surface of the embossed cynonda 8, which is rotating in the heating device 6, has a large number of depressions 13a on its surface, and is vacuum-suctioned from inside. 25 and a guide piece 26, a flat film 24 at room temperature is continuously supplied in a winding manner, and this film 24 is rotated integrally with the embossing cylinder 8, and the film 24 is rolled on the surface of the embossing cylinder 8.
4 continues to be heated, and the vacuum device 30 continues to draw suction from the internal pressure reduction chamber of the embossing cylinder 8.

Then, the film 24, which had been in close contact with the surface of the embossing cylinder 8 in a flat plate shape, gradually softens as it is rotated and transferred, and at the same time, it gradually dents toward the inside of the recess 13a, and eventually reaches the inside of the recess 13a. The embossed film 3 has a large number of independent protrusions 2 in close contact with the inner surface.

The film 24 is moved together with the embossing cylinder 8,
While rotating, the flat pack film 4 is continuously fed from the roll 27 at room temperature to the embossed film 3 in a predetermined shape, and the overlapping portion is passed to the crimping roll 28. The embossed film 3 and the pack film 4 are crimped together to form a completely integrated material, that is, a cushioning sheet 1 having a large number of protrusions 2 forming independent air chambers 5, and an embossed cylinder is formed. Take it out continuously by peeling it off from the surface of 8.

When the embossing cylinder 8 rotates, the side plate 11 of the embossing cylinder 8 is provided with a number of depressurizing holes 17 on the same circumferential surface according to the number of internal chambers of the embossing cylinder 8 partitioned by the partition plate 20, Since this hole 17 can always be communicated with the vacuum device 30 through the fixing box 18, the depressurization effect can always be performed satisfactorily.

Of course, in the recess 13a on the circumferential surface of the embossing cylinder 8, a thin plate 16 having a large number of small holes 15 is attached to the bottom of the through hole 13, so that the pressure inside the recess 13a is always well reduced from the bottom direction.

Note that the product cushioning sheet 1 is an embossed cylinder 8.
Since the chamber in the fixed box 18 is not connected to the vacuum device at the position corresponding to the part to be peeled off and taken out from the surface of the product, the product removal position is not suctioned from the inside of the embossing cylinder 8. The buffer sheet 1 can always be removed easily and reliably.

The film 24 and the pack film 4 are preferably plastic films made of the same material, such as Botethylene.

That's ゛, embossed film 3 and pack film 4.
is easily crimped with 28 parts of the crimping roll.

In addition, when manufacturing the cushioning sheet 1 using a different type of film, it is preferable to apply an adhesive to the pack film 4 or heat the pack film 4 before sending it to the 28 parts of the pressure roll.

In addition, a chamber in the fixed box 18 located on the surface of the embossing cylinder 8 at a position corresponding to the product take-out position is connected to an air blower, and air is blown to the product take-out position to prevent the temperature of the embossing cylinder 8 etc. from rising more than necessary. It may be possible to prevent this from happening, and also to allow the cushioning sheet 1 to be peeled off more easily.

Of course, in this case, the other chambers in the fixed box 18 are connected to the vacuum device 30.
Connect it to.

In order to make the cushioning sheet 1 breathable, it is possible to make small holes in the area where the flat part of the embossed film 3 and the pack film 4 overlap, but in that case, the circumferential surface of the embossed cylinder 8 A large number of non-penetrating small holes are provided in the part without the recess 13a, and a hole punching roll with a large number of needles arranged on the circumferential surface to fit into the small holes is placed in the embossing cylinder 8 after the crimping roll 28. A roll for taking out the product is rotatably provided in contact with the surface of the embossing cylinder 8 after the perforation is provided on the surface of the embossing cylinder 8.

In addition, in order to make the cushioning sheet 1 stronger, a supplementary material such as a net may be supplied between the embossed film 3 and the pack film 4 on the embossed cylinder 8.

As described above, since this invention has the structure as described in the claims of the utility model registration, the cushioning sheet can be manufactured reliably and easily.

Since the embossing cylinder 8 having a simple structure is used, the embossing cylinder 8 is easy to manufacture and has a reliable function.

Furthermore, since the structure of the embossing cylinder 8 is simple, it is possible to easily manufacture an embossing cylinder 8 with a large diameter, and therefore, the residence time of the film 24 within the heating device 6 can be made relatively long. Emboss cylinder 8
The embossed film 3 can be made by gradually melting and softening the film 24 on the surface.

Therefore, it is not necessary to heat the film 24 before supplying it, and stable supply can be performed at room temperature, making operation easier.

In addition, since the embossing cylinder 8, which has a simple structure, is rotated within a simple heating device 6, it is easy to operate, and manufacturing loss is reduced due to simple labor.Furthermore, the equipment is inexpensive, so manufacturing costs are reduced. It is small in size and can be easily repaired and inspected, making it extremely easy to implement.

Furthermore, in this invention, the embossing cylinder has a cylindrical shape with side plates on both sides in the axial direction, and the inside is divided by a number of partition plates installed in the circumferential direction, so that the pack film can be crimped onto the embossing film. Even if the pressure roll is strongly pressed against the outer peripheral surface of the embossing cylinder, the cylindrical embossing cylinder can be prevented from being deformed by the action of the many partition plates. By not always connecting the buffer sheet to the vacuum device, but by always connecting only the other positions to the vacuum device, it is possible to reliably and easily strip off the buffer sheet and manufacture the embossed film.

In addition, the outer peripheral wall of the embossed cylinder is formed by gluing a thin plate with many small holes to the entire inner periphery of a cylindrical plate with many independent through holes. In addition, a thin plate with many small holes can be reliably attached to the entire inner circumference of a cylindrical plate with many independent through holes, and the inside of the embossing cinder can be easily obtained. It is also possible to sufficiently prevent the thin plate from bending inward or coming off due to the vacuum suction action from.

Further, a hole is provided in each side plate of the winter wool chamber 1 of the embossing cylinder, and a fixing box having a second chamber communicating with each hole is provided in close contact with the side plate of the embossing cylinder, and the inside of the fixing box is arranged in the circumferential direction. The second chambers are divided into multiple sections with partition plates to form the aforementioned multiple second chambers, and the second chambers of the fixing box are divided into multiple chambers at other positions, except for the second chamber of the fixed box corresponding to the position where the cushioning sheet is removed on the outer circumferential surface of the embossing cylinder. Since the second chamber is connected to the vacuum device, the embossed film production department must always ensure that the first depressurizing hole and the second depressurizing hole are in communication with each other, no matter what rotational position the embossing cylinder is in. Therefore, it is possible to reliably and easily manufacture an embossed film in which each protrusion has a sufficient bottom shape in every corner, and of course, it is possible to reliably and easily manufacture a high-quality and well-shaped cushioning sheet.

[Brief explanation of drawings]

Fig. 1 is a partially sectional perspective view showing one side of the product manufactured by this invention, Fig. 2 is a longitudinal sectional view showing one embodiment of this invention,
3 is a sectional view taken along line III--III in FIG. 2, FIG. 4 is an enlarged view of section IV in FIG. 3, and FIG. 5 is a sectional view taken along line V--V in FIG. 1...Buffer sheet, 2...Protrusion, 3
... Embossed film, 4 ... Pack film, 5 ... Air chamber, 6 ... Heating device, 8 ... Emboss cylinder, 9・・・・・・
・Rotating shaft, 11...Side plate, 12...Outer peripheral wall, 13...Through hole, 13a...Recess, 14...Cylinder Board, 15...Small hole,
16... Thin plate, 17... Hole, 18...
...Fixed box, 19.20 ...Partition plate, 23
゜27.28... Roll, 24... Film, 30... Vacuum device.

Claims (1)

[Scope of utility model registration request] An emboss cylinder is rotatably mounted on which a flat film is wrapped, and an embossed film with a large number of protrusions is formed by external heating and internal vacuum suction. This is a cushioning sheet manufacturing apparatus that is capable of pressing a compression roll onto an embossing cylinder, which presses a pack film to form a cushioning sheet and peels it off. The outer peripheral wall of the embossed cylinder is a cylindrical plate with a large number of independent through-holes formed in the outer peripheral wall of the embossed cylinder. A thin plate having a large number of small holes is pasted on the entire inner circumference of the embossed cylinder, and a hole is provided in each of the side plates of the winter hair 1 chamber of the embossed cylinder.
A fixing box having a second chamber communicating with each hole is provided in close contact with the side plate of the embossing cylinder, and the inside of the fixing box is divided into multiple parts in the circumferential direction by partition plates to form the multiple second chambers. An apparatus for manufacturing a cushioning sheet, in which second chambers at other positions other than the second chamber of the fixed box corresponding to the cushioning sheet stripping position on the outer circumferential surface of the embossing cylinder are connected to a vacuum device.