JPH06340008A - Hot edge in case-manufacturing device - Google Patents

Abstract

PURPOSE:To enable a tapered fusion welded case which is strong in intensity of the case and excellent in quality and free from deformation, perforation, etc., to be formed by assembling by a method wherein a tip angle of an edge for forming a bending groove is formed to be smaller than a tip angle of an edge for fusion of a side wall edge part. CONSTITUTION:A tip angle of an edge C deg. of an edge for forming a bending groove 2 is formed to be smaller than a tip angle D deg. of an edge for fusion of a side edge part 3. In a concrete example wherein a side wall upper part of a tapered fusion case is inclined by 10 deg. to 14 deg. outward to a vertical direction of a bottom plate, a tip angle C deg. of the edge for forming the bending groove 2 should be preferably formed into 50 deg.-58 deg., and the tip angle D deg. of the edge for fusion of the side wall edge part 3 should be preferably formed into 63 deg.-69 deg. as the tip angles thereof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot blade in a box making apparatus used for assembling and forming a tapered fusion-bonding box using an original fabric made of a synthetic resin sheet.

[0002]

2. Description of the Related Art Conventionally, in a fusion-bonding box, a bent edge of a box-shaped side wall and a margin of a side wall in a box shape are melt-formed on an original fabric made of a synthetic resin sheet by a hot blade, and a peripheral portion of the original fabric is melted. Are assembled and formed by bending and standing. A box-making device for assembling and forming this fusion-bonding box includes a hot blade for melting and forming a bending groove and a margin of a side wall end into an original fabric, and the original fabric is pushed to bend and raise the peripheral portion. And a molding die for performing fusion bonding.

As a hot blade in this box making apparatus, for example, in order to make a rectangular fusion-bonding box, the whole is formed in a cross beam shape, and its transverse cross section is formed in a wedge shape. Stuff used. A heater is embedded inside the hot blade, and the hot blade is heated by this heater. Among the double-sided hot blades, the bent groove forming blade, which is the central rectangular portion, melts and forms the bent grooves in the original fabric. In addition, the side edge melting blade, which is a V-shaped portion projecting outward from the corner of the rectangular portion of the double girder-shaped hot blade, melts and forms a melt margin at the side edge of the raw material. .

The tip angle of the hot blade used when manufacturing a fusion-bonded box having a side wall perpendicular to the box bottom plate is empirical for both the bent groove forming blade and the side wall end melting blade. Was formed at 63 ° to 69 °. Further, even when manufacturing a tapered fusion-bonded box in which the upper portion of the side wall is inclined with respect to the vertical direction of the box bottom plate, the hot blade has the same tip angle of 6 as above.
What was formed at 3 ° to 69 ° was used, and this was dealt with by replacing the molding die with a molding die that matches the outer shape of the tapered fusion-bonding box.

[0005]

However, when the above-mentioned hot blade is used when assembling and forming the tapered fusion-bonding box, the bent groove melting blade and the side wall end melting blade have the same tip angle. Therefore, the bent groove is formed relatively large in the case of the tapered fusion-bonding box having the inclined side wall. For this reason, when the taper fusion box is assembled and formed by bending and raising the peripheral edge portion of the original fabric, the inclination angle of the side wall is difficult to be formed according to the set value, and the fusion of the side wall end portion and the bending groove However, there is a drawback in that the balance of the fusion bonding becomes poor, and the fusion of the bent groove and the side wall end portion becomes insufficient, resulting in weakening the strength of the box.

Further, since the bending groove is formed relatively large, the side wall of the assembled box is squeezed inward and deformed, and the original fabric is excessively melted by the bending groove forming blade and bent. Since the groove may penetrate the back surface of the original fabric and make a hole in the original fabric, there is a disadvantage that only a tapered fusion-bonding box of poor quality can be obtained. Therefore, an object of the present invention is to provide a hot blade in a box-making apparatus capable of assembling and forming a tapered fusion-bonding box having high box strength and excellent quality without deformation or perforation. is there.

[0007]

In order to solve the above problems, the hot blade in the box making apparatus of the present invention is used when a tape-shaped fusion-bonding box is assembled and formed by using a raw material made of a synthetic resin sheet. The edge angle of the bent groove forming blade that melts and forms the bent groove into the raw fabric is the tip of the side wall end melting blade that melts and forms the melt margin of the side wall end into the raw fabric. It is characterized in that it is formed smaller than the angle.

[0008]

According to the hot blade of the box-making apparatus of the present invention having the above-mentioned structure, by pressing the hot blade against the original fabric, the original fabric is melted at the bent groove of the side wall and the side wall end portion in the box shape. The white space is melted and formed. Further, since the tip angle of the bent groove forming blade of the hot blade is formed smaller than the tip angle of the side wall end melting blade, the bent groove matching the inclined side wall of the taper fusion box is formed by melting. can do. Thus, when the box-shaped side wall is bent and erected, the side wall end portion and the bent groove can be fused in a well-balanced and reliable manner. In addition, the side wall of the tapered fusion-bonding box can be tilted according to the set value, and it is also possible to prevent the bending groove from penetrating and punching the original fabric due to excessive melting.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a plan view of a hot blade in a box making apparatus according to an embodiment of the present invention, and FIG. 2 shows a sectional view of the hot blade of FIG. FIG. 1B is a sectional view of the hot blade of FIG. 1 taken along the line BB ′. Further, FIG. 3 is a perspective view of a raw material before and after the tapered fusion box, the bending groove and the melt margin of the side wall end portion are formed by the hot blade in FIGS. 1 to 3 respectively. .

As shown in FIG. 1, the hot blade 1 in the box making apparatus according to the embodiment of the present invention is formed in a cross beam shape as a whole. In addition, 9 in the figure is a guide for arranging the original fabric S at a fixed position in the box making apparatus described later. The hot blade 1 is a side wall 1 from a synthetic resin sheet material S.
In order to assemble and form the tapered fusion-bonding box T in which 0 is inclined,
Bending groove 1 of side wall 10 in the shape of a box pressed against the original fabric S
3 and the melted portion 12 at the end of the side wall 10 are melted and formed (see FIG. 3C). As the material of the hot blade 1, for example, aluminum, iron, stainless steel, copper, ceramics or other materials having good thermal conductivity are used. As shown in FIG. 2, the hot blade 1 has a cross-sectional shape with a sharp wedge-shaped tip at its tip. An insertion hole 4 is provided inside the thermal blade 1, and a heater (not shown) is embedded in the insertion hole 4. Then, the heater heats the hot blade 1.

The central rectangular portion of the double-sided hot blade 1 is formed as a bent groove forming blade 2 corresponding to the shape of the bottom plate 11 of the tapered fusion-bonding box T. The bending groove forming blade 2 presses against the original fabric S to melt the original fabric S, and bends the peripheral edge portion of the original fabric S that becomes the side wall 10 of the tapered fusion-bonding box T to bend and stand up. 13 is formed. Further, in the double-sided hot blade 1, a portion protruding outward in a V shape from a rectangular corner is formed as a side wall end melting blade 3. The side wall end melting blade 3 melts the side wall end 12 in the box-developed shape in order to melt the adjacent side walls 10 when the tapered fusion box T is assembled and formed.

As shown in FIG. 2, the bent groove forming blade 2 and the side wall end melting blade 3 are formed such that the tip angle of the bent groove forming blade 2 is smaller than that of the bent groove forming blade 2. That is, the same figure (A)
The tip angle C ° of the bent groove forming blade 2 shown in FIG. 2 is smaller than the tip angle D ° of the side wall end melting blade 3 shown in FIG. As the tip angles of these, specifically, the upper portion of the side wall 10 of the tapered fusion-bonding box T is the bottom plate 11
Of the bending groove forming blade 2 having a tip angle C ° of 50 ° to 5 ° with respect to the vertical direction of 10 ° to 14 ° outwardly.
8 °, the tip angle D ° of the side wall end melting blade 3 is 63 ° to
It is preferably formed at 69 °. When the tip angle D ° of the side wall end melting blade 3 is 63 ° to 69 °,
When the tip angle C ° of the bent groove forming blade 2 is less than 50 °, the side wall 10 of the tapered fusion bonding box T may bulge outward, and conversely, the tip angle C ° is 58. If the angle exceeds 50 °, the side wall 10 of the tapered fusion-bonding box T may be squeezed inward and the box may warp, and in any case, the strength of the box becomes weak.

The bending groove forming blade 2 and the side wall end melting blade 3 are divided into left and right with respect to the center line that bisects the tip angle of the blade 3 when the taper fusion box T is assembled. It is preferable that the grooves 12 and the bent grooves 13 are evenly arranged so as to be exactly aligned with each other. Further, the tip of the bending groove forming blade 2 has a tip of the side wall end melting blade 3 in order to reliably prevent the bending groove 13 from being deeply formed when it is pressed against the raw fabric S. It is preferable to withdraw a little more.

The tip of the hot blade 1 may be coated with a silicone resin, a fluorine resin or the like so that the molten resin of the raw fabric S does not adhere to it. Further, the overall shape of the hot blade 1 is formed in a double girder shape because the bottom plate 11 is formed by assembling the tapered fusion box T having a square shape.
It may be formed correspondingly so that a tapered fusion box T having a polygonal shape or a hexagonal shape can be assembled and formed.

Next, the manner of assembling and forming the taper-shaped fusion-bonding box T from the original fabric S by using the hot blade 1 will be described. With reference to FIG. 3, as shown in FIG. 2B, the original fabric S used in this embodiment has four corners 14 of the original fabric S made of a synthetic resin sheet having a rectangular shape, and each has a rhombus shape. The taper fusion box T is formed by trimming in advance and is cut out to form a tapered fusion box T. As the material of the material S, for example,
A foamed or non-foamed resin sheet such as polystyrene, polyethylene, polyvinyl chloride, or styrene-maleic anhydride copolymer is used. The heat roll 1 is pressed from the upper surface of the raw fabric S so that the bent groove forming blade 2 of the hot fabric 1 matches the rectangular dotted line portion shown in FIG.
As a result, as shown in FIG. 3C, the raw fabric S is bent by the bending groove forming blade 2 which is a rectangular portion of the cross pattern forming the hot blade 1 to bend the side wall 10 in the box shape. The groove 13 and the side wall end melting blade 3 which is a V-shaped portion of the cross beam shape forming the hot blade 1 melt-form the box-shaped side wall end 12 melted margin at one time. Next, when the peripheral edge portion of the original fabric S that becomes the side wall 10 of the box is bent and erected, the bending groove 13 and the end portion of the side wall 10 are fused and the tapered fusion box T as shown in FIG. Are assembled and formed. In this tapered fusion-bonding box T, the upper portion of the side wall 10 is inclined outward by E ° with respect to the vertical direction of the rectangular bottom plate 11.

The tip angle C ° of the bent groove forming blade 2 of the hot blade 1
Is formed to be smaller than the tip angle D ° of the side wall end melting blade 3, it is possible to melt-form the bent groove 13 that matches the inclined side wall 10 of the tapered fusion-bonding box T. Thereby, when the box-shaped side wall 10 is bent upright, the side wall end portion 12 and the bent groove 13 can be fusion-bonded in a well-balanced manner. In addition, the side wall 10 of the tapered fusion-bonding box T can be inclined according to the set value, and it is also prevented that the bent groove 13 penetrates and a hole is formed in the original fabric S due to excessive melting. Therefore, the obtained taper fusion box T has high strength and is excellent in quality without deformation or perforation.

Next, a box making apparatus using the hot blade 1 will be described. FIG. 4 shows a side view of a box making apparatus including the hot blade 1 of FIG. As shown in FIG. 4, this box making apparatus includes a box making part A for assembling and forming the taper fusion bonding box T, and a raw fabric supply hopper part B for supplying the raw fabric S to the box making part A.
The box making part A includes a hot blade 1 according to an embodiment of the present invention shown in FIG. 1, a molding die 5 for assembling and forming a tapered fusion-bonding box T from an original fabric S, and the inside of the molding die 5. It has an intermediate pressing plate 6 for pushing in the raw fabric S, and a pushing-up plate 7 for pushing out the taper-shaped fusion-bonded box T formed in the molding die 5. The hot blade 1 is connected to a cylinder rod (not shown) that can move back and forth, and can move up and down. The molding die 5 is composed of a frame-shaped female die, and is arranged below the thermal blade 1. The molding die 5 is formed so that the inner shape thereof matches the outer shape of the taper fusion box T. The middle push plate 6 and the push up plate 7 are respectively connected to cylinder rods (not shown) and can be raised and lowered. The middle pusher plate 6 is mainly used when the original fabric S on the guide plate 8 is pushed into the forming die 5, and the pushing up plate 6 is mainly used to form the assembled taper fusion box T in the forming die 5. Used when discharging from.

The hopper part B feeds a storage part B1 in which the raw fabrics S are stacked and stored in a multi-stage manner, and a lowermost raw fabric S'to the box-making part A through an opening B3 provided in the lower part of the storage part B1. With a kicker B2. In addition, in the figure, 9 is a guide for positioning the original sheet S fed out on the guide plate 8.

In order to manufacture the taper-shaped fusion-bonding box T using the above box-making apparatus, the raw fabric S fed from the hopper B onto the guide plate 8 is sandwiched between the inner push plate 6 and the push-up plate 7 and heated. Blade 1
Is lowered and brought into contact with the original fabric S to form a box-shaped bent groove 13 of the side wall 10 and a melt margin of the side wall end 12 (see FIG. 3C). Then, the hot blade 1 is raised and the intermediate press plate 6
Further, by lowering the push-up plate 7, the original fabric S is pushed into the forming die 5 to bend and stand up the peripheral portion of the original fabric S, and the side wall end portions 12 adjacent to each other are fused to form a box. Next, the inner pressing plate 6 is raised and the lifting plate 7 is raised to take out the tapered fusion-bonding box T assembled from the inside of the molding die 5 and collect it as a product.

The present invention is not limited to the above embodiment, and various design changes can be made without changing the gist of the invention. Next, the following experiment was conducted using the hot blade in the box making apparatus of the present invention. Experimental Example A hot blade having the same shape as that of FIG. 1 with a bent groove forming blade having a tip angle of 54 ° and a side wall end melting blade having a tip angle of 66 ° was attached to the box making device shown in FIG. The fusion-bonding box T was manufactured.

Then, the side wall angle of the obtained taper fusion box T (the inclination of the side wall upper part with respect to the vertical direction of the bottom plate of the box) was measured and found to be 12 ° and within a set value (10 ° to 14 °). Moreover, there was no deformation. Comparative Example 1 A tapered fusion-bonding box T was prepared in the same manner as in the above experimental example except that a hot blade having a bent groove forming blade tip angle of 49 ° and a side wall end melting blade blade tip angle of 66 ° was used. As a result, the side wall angle of the obtained taper fusion box T was 15 °, which was larger than the set value, and the box was swollen and the strength was weak. Comparative Example 2 Except that the tip angle of the bent groove forming blade of the hot blade was 59 °,
When the tapered fusion-bonding box T was manufactured in the same manner as in Comparative Example 1 above, the side wall angle of the obtained tapered fusion-bonding box T was as small as 9 °, the box was warped and the strength was weak, and The groove was too melted and there was a hole. Comparative Example 3 A tapered fusion box T was prepared in the same manner as in the above experimental example except that a hot blade having a bent groove melting blade with a tip angle of 54 ° and a side wall end melting blade with a tip angle of 62 ° was used. As a result, the amount of melting at the end portions of the side wall was reduced, the end portions of the side wall were not well fused to each other, and a box could not be formed. Comparative Example 4 A tapered fusion box T was manufactured in the same manner as in Experiment 3 except that the tip angle of the blade for melting the side wall end of the hot blade was 70 °. There was a hole in the part, and the side wall ends were not well fused to each other, and the box could not be formed.

[0022]

As described above, according to the hot blade in the box making apparatus of the present invention, the tip angle of the bent groove forming blade of the hot blade is formed smaller than the tip angle of the side wall end melting blade. Therefore, when the box-shaped side wall is bent and stood upright, the side wall end portion and the bent groove can be securely welded in a well-balanced manner, and strong welding can be performed. In addition, the side wall can be inclined according to the set value, and the bent groove does not penetrate to form a hole in the original fabric due to excessive melting.
Therefore, it is possible to obtain an assembly capable of assembling a tapered fusion-bonding box having high box strength and excellent quality without deformation or perforation.

[Brief description of drawings]

FIG. 1 is a plan view showing a hot blade in a box manufacturing apparatus according to an embodiment of the present invention.

2A is a view showing a section taken along the line AA ′ of the hot blade of FIG. 1, and FIG. 2B is a view showing a section taken along the line BB ′ of FIG.

FIG. 3 (1) in the figure is a taper fusion box, (2) in the figure is a raw fabric before being pressed against a hot blade, and (3) is a raw fabric after being pressed against a hot blade. It is a perspective view which respectively shows.

FIG. 4 is a side view showing a box manufacturing apparatus using the hot blade of FIG.

[Explanation of symbols]

 T Tapered fusion box 1 Hot blade 2 Bend groove forming blade 3 Side wall end melting blade

Claims (2)

[Claims] 1. A hot blade used for assembling and forming a tapered fusion-bonding box using an original fabric made of a synthetic resin sheet, which is for forming a bent groove by melting and forming the folded groove in the original fabric. A hot blade in a box-making apparatus, wherein a tip angle of the blade is formed smaller than a tip angle of a side wall end melting blade that melts and forms a melted margin of the side wall end into a raw material. 2. The side wall is 10 ° to the vertical direction of the box bottom plate.
Used when assembling and forming a taper-shaped fusion-bonding box inclined at 14 °, the bent groove forming blade has a tip angle of 50 ° to 58 °, and the side wall end melting blade has a tip angle of 63 ° to 69 °. The hot blade in the box manufacturing apparatus according to claim 1, wherein