JPH0556425U - Hot blade for melting used for manufacturing fusion box - Google Patents

Abstract

(57) [Summary] [Structure] The tip upper portion 12 immediately above the tip portion 11 formed in a bilaterally symmetrical V shape is formed at an acute angle from the tip portion 11. [Effect] The symmetrical V-shaped groove 72 can be provided along the step 71 formed on the plate member 7 without any problem in terms of shape.
Therefore, it is possible to easily manufacture the fusion-bonding box 8 having the step 71 and the like at the bottom near the side surface 85.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a hot blade for melting used for manufacturing a fusion box manufactured by bending and melting a plate material made of a thermoplastic resin, and more specifically, a bent V groove on a plate material having a step or a protrusion. The present invention relates to a melting hot blade for setting.

[0002]

[Prior Art]

 BACKGROUND ART Conventionally, as a melting hot blade used for manufacturing a fusion-bonding box made of a thermoplastic resin having a rectangular shape or a rectangular shape, for example, a cross-shaped hot blade is known. In order to manufacture a fusion-bonding box using this hot blade, first, the hot blade is pressed against a plate material made of a thermoplastic resin to form a bent V groove which is melted in the plate material, and the four corners of the plate material are To be resected. Next, this plate material is pushed into the tubular mold according to the outer shape of the fusion box by the pressing plate. As a result, the plate material is bent from the bent V groove formed by the hot blade and heat-bonded to complete the fusion-bonding box. The tip angle of the hot blade is empirically set to about 30 ° to 35 ° so that the angle of the bent V groove after melting is approximately 90 °.

By the way, recently, a fusion-bonding box having protrusions or steps on the bottom or the like has been demanded. There are two types of fusing boxes, one that does not have a protrusion or a step on the bottom near the side surface, and the other that has it near the side surface. In order to manufacture a fusion-bonded box having projections and steps near the side surface at the bottom, the projections and steps are formed on the plate material in advance, and the folding ruled lines are formed. Then, the plate is bent along the folding ruled line, and only the joints for forming the side surfaces of the fusion box are heat-sealed to manufacture the fusion box. In addition, in order to manufacture a fusion box with no protrusions or steps on the bottom near the side surface, after molding the protrusions or steps on the plate material in the same manner as above, the same as in the case of producing a flat bottom fusion box Then, a bent V groove is formed to manufacture a fusion box.

[0004]

[Problems to be Solved by the Invention] However, when manufacturing a fusion-bonding box having steps and protrusions near the side surface on the bottom, since the ruled lines are only formed on the plate material, the side surface of the fusion-bonding box is set to 90 ° It was difficult to stand up. Further, in this fusion bonding box, since only the adjacent side surfaces are heat-sealed to each other, the strength of the fusion bonding box was weak.

Further, the fusion-bonding box could not be manufactured using a hot blade. That is, since the projections or steps contact the hot blade, the projections or steps cannot be formed close to the side surface. Then, it is conceivable to set the tip angle of the hot blade at 30 ° to 35 ° to be smaller and raise the upper part vertically. However, a heater is usually embedded near the tip of the hot blade, and unless the thickness of the hot blade is secured to some extent, the heating capacity for the plate material and the amount of heat possessed by the hot blade itself will be insufficient. There is.

An object of the present invention is to manufacture a fusion box having steps and projections near the side surface at the bottom of the fusion box, so that it is possible to secure the heating capacity for the plate material, the amount of heat possessed by the hot blade itself, etc. It is an object of the present invention to provide a hot-melting blade used for manufacturing a fusion-bonding box in which symmetrically bent V-grooves can be provided in the vicinity of steps and protrusions.

[0007]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the composition of the hot blade for fusion used in the production of the fusion box of the present invention is such that the tip end portion is provided because the bent V groove is provided in the plate material made of thermoplastic resin for producing the fusion box. In the melting hot blade formed in a bilaterally symmetrical V shape, the melting hot blade is characterized in that an upper portion of the tip immediately above the tip portion is formed at an acute angle from the tip portion.

[0008] Of the upper part of the tip of the melting hot blade, the side arranged inward is formed at an acute angle from the tip.

[0009]

With the above structure, since the upper end of the melting hot blade is formed at an acute angle with respect to the distal end, it is possible to provide bilaterally symmetrical V-shaped grooves along the protrusions or steps formed on the plate material. it can. Further, since the upper end of the tip is formed only at an acute angle, the heater can be arranged near the tip as in the conventional case.

[0010]

【Example】

 Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a sectional view of a melting hot blade used for manufacturing a fusion bonding box according to one embodiment of the present invention, and FIG. 2 shows a perspective view of the melting hot blade. FIG. 3 is a perspective view showing a state in which a bent V groove is provided on the plate material by the above-mentioned hot blade for melting, and FIG. 4 is a perspective view of a fusion box in which the plate materials of FIG. 3 are assembled.

As shown in FIGS. 3 and 4, this melting hot blade is for manufacturing the fusion-bonding box 8 from a plate material 7 made of a thermoplastic resin in which a step 71 is formed in advance. Examples of the material of the plate material 7 include thermoplastic foaming resins such as polypropylene, polystyrene, and polyethylene. In order to manufacture the fusion box 8, as shown in FIG. 5, a hot blade for melting is pressed from directly above the plate material 7 having a step 71 formed therein to provide a bent V groove 72 and the plate material 7 The ears 74 at the four corners are cut off. Next, each edge portion 75 of the plate member 7 is bent upright from the bent V groove 72, and the bent V groove 72 and the bonding margins 76 and 77 are fused, and the fusion bonding box 8 is completed.

As shown in FIG. 2, the melting hot blade has a structure in which four hot blades A, B, C, D having a substantially pentagonal cross section are assembled in a cross beam shape. Examples of the material of the hot blades A, B, C and D include aluminum, iron, stainless steel, copper and ceramics. The hot blade for melting is usually attached to an upper mold (not shown) that can be raised and lowered. A heating heater 4 is embedded in each of the hot blades A, B, C, and D.

Each of the hot blades A, B, C, and D has a hot blade portion 1 for melting and forming a bent V groove 72 in the plate material 7, and a corner hot blade portion for melting and cutting off the ears 76 at the four corners of the plate material 7. Have a few. The hot blade portion 1 constitutes the middle portion of the hot blades A, B, C and D, and the corner hot blade portions 2 and 3 constitute both end portions of the hot blades A, B, C and D. As shown in FIGS. 1 and 5, the thermal blade portion 1 has a tip portion 11 formed in a V shape, and corners 11a and 11b are symmetrical with respect to the vertical line Y. The angles of these corners 11a and 11b are set to about 30 ° to 35 ° so that the edge portion 75 of the plate member 7 can stand upright. That is, if the angle is smaller than 30 °, the side surface 85 of the fusion-bonding box 8 is spread outward, and if it is larger than 35 °, the side surface 85 is closed inward. Further, in the tip upper portion 12 just above the tip portion 11, the corners 12a and 12b are asymmetric with respect to the vertical line Y. The corner 12a on the inner side of the thermal blade 1 (on the side facing the step 71 of the plate member 7) is formed to be more acute than the corner 11a of the tip 11. Further, the outer corner 12b of the thermal blade 1 is formed to be equal to the corner 11b of the tip 11. Thereby, the bent V groove 72 can be easily provided from directly above along the step 71 of the plate member 7.

FIG. 5 shows a portion where the tip portion 11 of the thermal blade portion 1 is pressed against the plate material 7, and the corner 12 a of the thermal blade portion 1 is set according to the degree of the step 71. .. 6 shows a cross-sectional view of the bottom of the fusion-bonding box 8 near the side surface 85. The plate member 7 provided with the bent V-groove 72 has its edge 75 raised to form the side surface 85. Meanwhile, the bent V groove 72 is heat-sealed to form the adhesive portion 73.

The corner hot blade portions 2 and 3 are each extended from the hot blade portion 1, as shown in FIG. The tips of the corner hot blade portions 2 and 3 are set to be slightly higher than the hot blade portion 1 so that the ears 74 at the four corners of the plate material 7 can be cut off. The corner hot blade portion 2 is provided with an auxiliary blade 21 in order to accelerate the melting of the adhesive margin 76 on one side of the edge portion 75 of the plate member 7. The tips of these corner hot blades 2 and 3 are also formed in a symmetrical V-shape. As a result, the adhesive margins 76 and 77 of the edge portion 75 of the plate member 7 have the same inclination angle, and the adjacent side surfaces 85 of the fusion-bonding box 8 are arranged at 90 °.

As described above, according to the melting hot blade of the above embodiment, since the corner 12a is formed to be sharper than the corner 11a, the melting hot blades A, B, C, and D are made of the plate material 7. It can be pressed vertically along the step 71 without being disturbed by the step 71, and the bent V groove 72 can be easily provided (see FIG. 5). Therefore, the fusion-bonding box 8 having the step 71 at the bottom along the inner side of the side surface 85 can be easily manufactured in the same manner as the conventional fusion-bonding box having a flat bottom. Further, the step 71 at the bottom of the fusing box 8 may be heat-sealed to the inside of the side surface 81 depending on how to take the corner 12a of the upper tip portion 12.

In the above embodiment, the melting hot blades A, B, C and D are assembled in a cross beam shape to manufacture a rectangular fusion-bonding box. It may be assembled into a shape so as to manufacture fusion-bonded boxes of various shapes. Further, the angle of the corner 12a of the tip upper portion 12 can be appropriately selected to be an acute angle from the angle 11a so that the level of the step 71 of the plate material 7 and the amount of heat retained by the hot blade 1 are not insufficient.

FIG. 7 is a cross-sectional view of another example of the hot blade section 1. In the hot blade shown in FIG. 3A, the corner 12a and the corner 12b of the tip upper portion 12 formed at an acute angle with respect to the tip 11 are equal, and are formed symmetrically with respect to the vertical line Y. This hot blade is preferably used, for example, in a case where projections and the like are formed on the side surface of the fusion box. The hot blade shown in FIG. 6 (b) has an auxiliary heater 41 embedded in the symmetrical upper tip portion 12 of the tip, so that the heat amount of the hot blade and the like are further improved. Similar to the above-mentioned hot blade, this hot blade is also preferably used for a welding box having protrusions formed on the side surface. In the hot blade shown in FIG. 3C, the outer corner 12b of the tip upper portion 12 is formed to be obtuse than the corner 11b of the tip 11. Since this heating blade can bring the heating heater 4 closer to the tip portion 11, the amount of heat possessed by the heating blade itself, the heating capacity for the plate material, and the like can be further improved. In addition, various design changes can be made within the scope of the invention.

Next, FIG. 8 shows a schematic view of a process of manufacturing a fusion-bonding box using the double-blade-shaped hot blade for melting of the above-mentioned embodiment. Referring to FIG. 8 (1), first, the plate member 7 having the step 71 is sandwiched between the pressing plates 5 and 5, and is placed on the upper portion of the cylindrical mold 6. The hot blade portion 1 is arranged above the plate member 7 along the step 71 of the plate member 7.

Referring to FIG. 8 (2), the hot blade portion 1 is lowered and pressed against the plate material 7 to form a bent V groove. Since the corner 12a of the upper end 12 of the hot blade portion 1 is formed to be sharper than the corner 11a, the bent V groove 72 is provided in the plate member 7 without the heat blade portion 1 being obstructed by the step 71 (Fig. 5). Referring to FIG. 8 (3), the plate member 7 provided with the bent V groove 72 is pushed into the tubular mold 6 by the pressing plates 5 and 5 descending. As a result, the edge portion 75 of the plate material 7 is erected from the bent V groove 72 and heat-sealed to form the joint portion 73. At the same time, the adhesive margins 76 and 77 of the respective edge portions 75 of the plate material 7 are heat-sealed to form the side surface 85 of the fusion-sealing box 8. Next, after the pressing plates 5 and 5 have risen, the sandwiching of the fusion-bonding box 8 is released and the fusion-bonding box 8 is taken out.

As described above, the fusion box 8 having the bottom step 71 near the side surface 85 can be easily manufactured as in the case of manufacturing the flat bottom fusion box.

[0022]

[Effect of the device]

 As described above, according to the melting hot blade used for manufacturing the fusion-bonding box of the present invention, since the tip upper portion is formed at an acute angle from the tip portion, the shape along the protrusion or the step formed on the plate material Bilaterally bent V-grooves can be provided without any hindrance, and the heater for heating can be embedded in the same arrangement as the conventional one. Therefore, it is possible to secure the amount of heat possessed by the hot blade itself, the heating capacity for the plate material, etc., and it is possible to easily manufacture the fusion-bonding box having the steps or protrusions at the bottom near the side surface.

[Brief description of drawings]

FIG. 1 is a sectional view showing an outline of a melting hot blade according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the hot blade for melting shown in FIG. 1 assembled in a cross beam shape.

FIG. 3 is a perspective view showing a plate member provided with a bent V groove by using the melting blade of the present invention.

FIG. 4 is a perspective view showing a fusion bonding box in which the plate members of FIG. 3 are assembled.

FIG. 5 is a cross-sectional view schematically showing a state where the melting hot blade of FIG. 1 is pressed against a plate material.

FIG. 6 is a cross-sectional view showing a bent portion of the fusing box.

FIG. 7 is a cross-sectional view showing an outline of a melting hot blade according to another embodiment of the present invention.

FIG. 8 is a schematic view showing a process of manufacturing a fusion-bonding box using the hot-melting blade shown in FIG.

[Explanation of symbols]

 A, B, C, D Heat blade for melting 1 Heat blade portion 11 Tip portion 11a, 11b Corner 12 Top upper portion 12a, 12b Corner 7 Plate material 72 Bent V groove 8 Fusion box

Claims (2)

[Scope of utility model registration request] 1. A melting hot blade having a V-shaped symmetrical front end for forming a bent V groove on a plate material made of a thermoplastic resin for manufacturing a fusion-bonding box, wherein the melting hot blade comprises: A melting hot blade used for manufacturing a fusion-bonding box, wherein an upper part of the tip just above the tip is formed at an acute angle from the tip. 2. The above-mentioned tip of the hot blade for melting is formed on an inwardly arranged side at an acute angle with respect to the tip.
A hot blade for melting used for manufacturing the fusion-bonding box described above.