Glove mold and glove manufacturing method using this mold

Abstract

To provide a mold for a glove capable of manufacturing a high-quality glove, and a manufacturing method of a glove using the mold.SOLUTION: There is provided a glove mold for manufacturing a glove by cutting a two-layer film obtained by stacking two films into a hand shape, and welding a peripheral edge portion thereof, in which the mold has a cutting / welding blade facing the peripheral edge portion of the glove except an insertion port for inserting a hand and formed continuously along the peripheral edge portion. A cross section of a surface orthogonal to the direction along the peripheral edge portion of the cutting / welding blade has, at the outer periphery thereof, a first line inclined at a first angle in the direction away from the glove toward the inside of the glove from a blade edge coming in contact with the peripheral edge portion of the glove and a second line inclined in the direction further away from the glove at a second angle larger than the first angle from an end on the side opposite to the blade edge of the first line.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a glove mold for cutting, for example, two layers of film into the shape of a hand and welding the peripheral edges, and to a method for manufacturing gloves using this mold. [Background technology]

[0002] Conventionally, gloves made of synthetic resin films such as polyethylene have been known. As shown in Patent Document 1, for example, film gloves can be produced by stacking two thin polyethylene films, pressing a hand-shaped mold onto the films, cutting the peripheral edges of the gloves, and welding them together. Such gloves can be widely used, for example, as disposable gloves.

[0003] In recent years, development of disposable gloves using various functional film materials has progressed, including gloves made from carbon-neutral materials that are not derived from petroleum and are biodegradable in soil and marine environments. However, many functional film materials have molecular weights that are more difficult to control than synthetic resins such as polyethylene, and some resins have a wide molecular weight distribution. Resins with a wide molecular weight distribution are more difficult to weld together than polyethylene films with a narrow molecular weight distribution. Resins with a wide molecular weight distribution tend to leave large molecules undissolved during heat welding, resulting in poor welding in these areas. Insufficient welding between films can result in holes around the edges of the glove, reducing quality. Therefore, when using functional films, it is necessary to devise ways to prevent poor welding at the film seal.

[0004] As a glove manufacturing device for improving the weldability of such a film, it is conceivable to use a manufacturing device that has a mold seal part that welds the film to the contour shape of the glove and a cutter blade arranged along the outer periphery of the mold seal part, outward from the outer periphery of the mold seal part, as shown in Patent Document 2. However, in the mold seal part described in Patent Document 2, the angle between the seal surface and the inner wall and the angle between the seal surface and the outer wall are both right angles, and these angles come into strong contact with the film, which may melt the film at these points and cause holes to form. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Jikko No. 46-4998 [Patent Document 2] Japanese Patent Application Laid-Open No. 2016-3428 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made in consideration of the above points, and an object of the present invention is to provide a glove mold capable of producing high quality gloves, and a method for producing gloves using this mold. [Means for solving the problem]

[0007] One embodiment of the glove mold of the present invention is a glove mold for manufacturing gloves by cutting two layers of film into the shape of a hand and welding the periphery thereof, and the mold has a cutting / welding blade that is continuous along the periphery of the glove, facing the periphery excluding the insertion opening for inserting the hand, and the cross section of the cutting / welding blade taken along a plane perpendicular to the direction along the periphery of the glove has a first line inclined at a first angle from the cutting edge that contacts the periphery of the glove towards the inside of the glove, in a direction away from the glove, and a second line inclined at a second angle greater than the first angle from the end of the first line opposite to the cutting edge of the first line in a direction further away from the glove, A third line extending from the cutting edge in the direction of movement of the glove mold on its outer periphery, and the first angle is in the range of 5° to 25°. The angle of the cutting edge between the first line and the third line is in the range of 65° to 85°. do.

[0008] According to the method for manufacturing a glove of the present invention, the cutting edge of the cutting / welding blade of the glove mold is heated to the melting temperature of the film, the heated cutting edge is pressed against two layers of film to cut along the peripheral edge of the glove, and radiant heat is applied to the two layers of film through the first inclined surface of the cutting / welding blade formed by moving the first line along the peripheral edge, thereby welding the two layers of film inside the peripheral edge. [Effects of the Invention]

[0009] According to one aspect of the present invention, it is possible to provide a glove mold capable of producing high quality gloves, and a glove manufacturing method using this mold. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic diagram showing a glove manufacturing apparatus equipped with a glove mold according to an embodiment of the present invention. [Figure 2] FIG. 2 is a plan view of the glove mold of FIG. 1 as seen from the film side. [Figure 3] FIG. 3 is a cross-sectional view of the glove mold of FIG. 2 taken along line F3-F3. [Figure 4] FIG. 4 is a cross-sectional view of the glove mold of FIG. 2 taken along line F4-F4. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, a manufacturing apparatus 100 for a glove 1 includes film rolls F1 and F2, transport rollers 2 and 4, a conveyor 6, a cutter 8, and a mold 10 (glove mold).

[0012] The film rolls F1 and F2 are formed by winding long biodegradable films f1 and f2 (hereinafter simply referred to as films f1 and f2) around rotating shafts R1 and R2, respectively. The films f1 and f2 are not particularly limited and may be made of synthetic resins such as ordinary polyethylene film, but are preferably made of long, thin sheets of, for example, microbially produced aliphatic polyesters such as polyhydroxyalkanoates, chemically synthesized aliphatic polyesters such as polylactic acid and polycaprolactone, or natural polymers such as starch or cellulose acetate.

[0013] The film rolls F1 and F2 are rotatably attached to a frame (not shown) of the manufacturing apparatus 100 with their rotation axes R1 and R2 spaced apart vertically and parallel to each other. The film roll F1 placed on top rotates counterclockwise in FIG. 1 and feeds film f1 to the right in the figure. The film roll F2 placed on the bottom rotates clockwise in FIG. 1 and feeds film f2 to the right in the figure. The film f1 fed from the film roll F1 overlaps the film f2 fed from the film roll F2.

[0014] The transport rollers 2 and 4 are arranged spaced apart from each other along the direction in which the films f1 and f2 are pulled out from the film rolls F1 and F2 (the direction of the arrow T in the figure; hereinafter, this direction may also be referred to as the transport direction T). The transport rollers 2 and 4 rotate with the films f1 and f2 wound around their outer circumferential surfaces, thereby feeding the films f1 and f2 at a constant speed in the transport direction T. The transport rollers 2 and 4 may also be of a type that rotates while sandwiching the two films f1 and f2 from above and below. In either case, the films f1 and f2 pulled out from the respective film rolls F1 and F2 are transported in the direction of the arrow T by the transport rollers 2 and 4 in a vertically stacked state.

[0015] Conveyor 6 is located below the transport path of films f1 and f2 between transport rollers 2 and 4, and travels in the direction of arrow T with its upper surface 6a in contact with the underside of the lower of the two films f1 and f2, film f2. In other words, conveyor 6 has a structure in which an endless belt is wound around multiple rollers that extend horizontally and perpendicular to the transport direction T, and the upper surface 6a of the belt is stretched in a predetermined position so that it can move along the horizontal plane. The belt of conveyor 6 is made of, for example, heat-resistant and elastic rubber. In the following description, the surface on which upper surface 6a of the belt of conveyor 6 is located may also be referred to as the transport surface.

[0016] Cutter 8 is disposed downstream (on the right side in the figure) of conveyor 6 along conveyance direction T. Cutter 8 has two cutting blades arranged above and below, sandwiching the conveyance path, i.e., the conveyance surface, of films f1 and f2. Each of the two cutting blades extends horizontally, perpendicular to conveyance direction T. Cutter 8 cuts films f1 and f2, which are placed on top surface 6a of conveyor 6 and conveyed in the direction of arrow T, at a predetermined position (at the wrist of glove 1) while they are still overlapping.

[0017] The mold 10 is disposed in a position facing the upper surface 6a of the conveyor 6, with the transport path of the films f1 and f2 sandwiched therebetween. The mold 10 is fastened to a flat surface 11a (the surface on the transport side) of a rectangular base plate 11 with screws (not shown). The mold 10 and base plate 11 are formed, for example, from a metal that easily conducts heat.

[0018] A heater 12 is attached to the surface of the base plate 11 opposite the mold 10. The heater 12 applies heat to the base plate 11 to heat the cutting edge 21 of the cutting and welding blade 20 (described later) of the mold 10 to a predetermined temperature. The base plate 11, to which the mold 10 and heater 12 are attached, is attached to a welding machine (not shown) with the surface 11a, to which the mold 10 is attached, positioned horizontally, and is provided so as to be movable in the direction of arrow P (up and down in FIG. 1). When the mold 10 moves to its lowest point in the direction of arrow P, the cutting and welding blade 20 (described later) of the mold 10 is pressed against the upper surface 6a of the belt of the conveyor 6, sandwiching the two overlapping films f1 and f2 therebetween. The belt of the conveyor 6 can be slightly elastically deformed by the mold 10 being pressed against it.

[0019] The manufacturing apparatus 100 having the above structure operates as follows. In the manufacturing apparatus 100, first, the heater 12 is energized to heat the cutting edge 21 of the mold 10 to the melting temperature of the films f1 and f2. Then, the conveying rollers 2 and 4 are rotated in a predetermined direction, and the films f1 and f2 fed from the two film rolls F1 and F2 are fed in a vertically stacked state in the conveying direction T. The two stacked films f1 and f2 are conveyed while placed on the upper surface 6a of the belt of the horizontally arranged conveyor 6. At this time, the lower film f2 of the two stacked films f1 and f2 contacts the upper surface 6a of the belt of the conveyor 6. The belt of the conveyor 6 runs in the conveying direction T at the same speed as the films f1 and f2.

[0020] In this state, the manufacturing apparatus 100 moves the mold 10 of the welding machine up and down in the direction of the arrow P in the figure at a predetermined timing. When the mold 10 reaches its lowest point, a cutting / welding blade 20 (FIG. 2) of the mold 10, which will be described later, contacts the upper film f1 of the two overlapping films f1, f2, and the two overlapping films f1, f2 are pressed against the upper surface 6a of the belt of the conveyor 6 for a short period of about 0.1 to 1 second. This period roughly corresponds to the time the belt is stopped between when the mold 10 touches the upper surface 6a of the belt and when it is released. As a result, the two overlapping films f1, f2 are melted and cut along the shape of the cutting edge 21 of the mold 10, and the peripheral edges of the two cut films are welded together.

[0021] Thereafter, the manufacturing apparatus 100 operates the cutter 8 at a predetermined timing to cut the two overlapping films f1 and f2 at the wrist portion of the glove 1, separating the product (glove 1) from the remaining film portion f' (burr).Then, the glove 1 as a product is boxed and shipped, and the film portion f' is disposed of or reused.

[0022] Fig. 2 is a plan view of the mold 10 as seen from the side of films f1 and f2. The mold 10 is equipped with a cutting and welding blade 20 having substantially the same shape (hand shape) as the peripheral edge of the glove 1 as a product. Fig. 3 shows a cross section of the cutting and welding blade 20 cut along a plane perpendicular to the direction along the peripheral edge of the glove 1 (i.e., the extension direction of the cutting and welding blade 20). The cross section of the cutting and welding blade 20 has substantially the same shape at all positions along the peripheral edge of the glove 1.

[0023] The cutting / welding blade 20 has a hand-shaped cutting edge 21 (ridge) at its tip that presses against the peripheral edge of the glove 1. The cutting edge 21 is a hand-shaped curve that is placed on an imaginary flat horizontal plane (a plane parallel to the paper surface of FIG. 2) when the mold 10 is attached to a welding machine (not shown) as shown in FIG. 1. The cutting edge 21 is not limited to such a curve with no width, and may have a shape with slightly rounded corners so that it contacts the film f1 at a predetermined width. In the following description, the imaginary horizontal plane on which the cutting edge 21 of the mold 10 is placed may also be referred to as the cutting edge surface.

[0024] The cutting / welding blade 20 has on its surface a first inclined surface 22 inclined from the cutting edge 21 toward the inside of the glove 1 and away from the glove 1, a second inclined surface 23 continuing from the edge 22a of the first inclined surface 22 opposite the cutting edge 21 and inclined further away from the glove 1, and a cutting surface 24 extending from the cutting edge 21 along the moving direction P of the mold 10. The cutting edge 21 of the cutting / welding blade 20 is a continuous line along the peripheral edge of the glove 1. The first inclined surface 22, the second inclined surface 23, and the cutting surface 24 are each continuous surfaces along the peripheral edge of the glove 1. The cutting surface 24 becomes the outer peripheral surface of the mold 10.

[0025] From another perspective, as shown in Figure 3, the cross section of the cutting and welding blade 20 has a first line L1 that slopes from the cutting edge 21 that contacts the peripheral edge of the glove 1 toward the inside of the glove 1 and away from the glove 1, a second line L2 that continues from the end (edge ​​22a) of the first line L1 opposite the cutting edge 21 and slopes further away from the glove 1, and a third line L3 that extends from the cutting edge 21 in the moving direction P of the mold 10 on its outer periphery.

[0026] The inclination angle (second angle) of the second line L2 with respect to the above-mentioned imaginary horizontal plane (cutting edge surface) is greater than the inclination angle (first angle) of the first line L1 with respect to the cutting edge surface. The sum of the angle α of the cutting edge 21 between the first line L1 and the third line L3 and the angle β between the first line L1 and the second line L2 is greater than 180°. In other words, the second line L2 is inclined with respect to the third line L3 in a direction that spreads away from the glove 1. It is also desirable that the angle α of the cutting edge 21 be an acute angle.

[0027] The first inclined surface 22 of the cutting / fusing blade 20 is a surface formed by moving the first line L1 in the cross section of FIG. 3 along the periphery of the mold 10. The second inclined surface 23 is a surface formed by moving the second line L2 along the periphery of the mold 10. The cutting surface 24 is a surface formed by moving the third line L3 along the periphery of the mold 10. The first line L1, the second line L2, and the third line L3 may be straight or slightly curved. In other words, the first inclined surface 22, the second inclined surface 23, and the cutting surface 24 are not limited to flat surfaces, but may also be slightly curved surfaces.

[0028] In this embodiment, the cutting surface 24 of the cutting / welding blade 20 extends in a direction perpendicular to the cutting edge surface on which the cutting edge 21 is located, and the angle α of the cutting edge 21 is set in the range of 65° to 85°, and the angle β is set in the range of 125° to 145°. That is, in this embodiment, the inclination angle (first angle) of the first inclined surface 22 with respect to an imaginary horizontal plane is set in the range of 5° to 25°, and the inclination angle (second angle) of the second inclined surface 23 with respect to the imaginary horizontal plane is set to 60°.

[0029] It is desirable to reinforce the film glove 1 by making the seal width of the films f1 and f2 larger at the crotch portion between the fingers and at the hem portion near the insertion opening where the user puts their hand than at other portions. When putting on the glove 1, the hem portion is spread to insert the hand into the insertion opening, so a relatively strong tensile force acts on the hem portion. Furthermore, when putting on the glove 1 and using it, a relatively strong force is likely to act on the crotch portion between the fingers. For this reason, the mold 10 of this embodiment has a structure for reinforcing the seal portions of the crotch portion between the fingers of the glove 1 and the hem portion.

[0030] FIG. 4 shows a cross section of the mold 10 at the crotch and bottom sections of the mold 10. Auxiliary molds 30 are attached to the crotch and bottom sections of the mold 10 to make the seal width of the films f1 and f2 wider than other sections. Each auxiliary mold 30 is fastened to a predetermined position on the mold 10 using multiple screws 40. Each auxiliary mold 30 has a curved shape that follows the periphery of the mold 10, and the auxiliary mold 30 attached to the crotch and bottom sections have different shapes depending on their attachment positions. However, all auxiliary molds 30 have substantially the same cross-sectional shape along a plane perpendicular to the periphery of the mold 10 throughout their entire length. In this embodiment, as shown in FIG. 2, four auxiliary molds 30 are attached to the crotch sections of the fingers and two auxiliary molds 30 are attached to the bottom sections.

[0031] The structure of the auxiliary mold 30 will be described below with reference to the cross-sectional view shown in FIG. The auxiliary mold 30 integrally has a fixing portion 32 that is fastened and fixed to the mold 10, and a contact portion 34 that is placed in contact with the surface of the cutting and welding blade 20 of the mold 10. The auxiliary mold 30 that is attached to the crotch portion between the fingers of the mold 10 is fastened and fixed to the mold 10 by screws 40 at two locations on the fixing portion 32 that are spaced apart along the periphery of the mold 10. The auxiliary mold 30 that is attached to the bottom portion of the mold 10 is fastened and fixed to the mold 10 by screws 40 at three locations on the fixing portion 32 that are spaced apart along the periphery of the mold 10. The fastening direction of the auxiliary mold 30 by the screws 40 (i.e., the axial direction of the screws 40) is parallel to the movement direction P of the mold 10, and is a direction in which the contact portion 34 of the auxiliary mold 30 is pressed against the surface of the cutting and welding blade 20 of the mold 10.

[0032] The contact portion 34 has on its surface a first contact surface 36 that contacts the first inclined surface 22 of the cutting and welding blade 20 of the mold 10, and a second contact surface 37 that contacts the second inclined surface 23 of the cutting and welding blade 20. The contact portion 34 also has on its surface a tip surface 38 that faces the glove 1, and a third inclined surface 39. The tip surface 38 is a surface that is continuous with the edge of the first contact surface 36 opposite to the second contact surface 37, and the corner between the tip surface 38 and the first contact surface 36 is located more inward of the mold 10 than the cutting edge 21 of the cutting and welding blade 20 of the mold 10.

[0033] The contact portion 34 is located closer to the first inclined surface 22 and the second inclined surface 23 than the cutting edge surface of the cutting / welding blade 20 of the mold 10. In other words, the contact portion 34 is located between the cutting edge surface and the first and second inclined surfaces 22, 23. In other words, the tip surface 38 of the contact portion 34 of the auxiliary mold 30 is located closer to the mold 10 than the cutting edge surface, with a slight step d between them. The tip surface 38 may be parallel to the cutting edge surface, or may be a surface slightly inclined in the same direction as the first inclined surface 22 of the cutting / welding blade 20.

[0034] The third inclined surface 39 is a surface continuing from the edge of the tip surface 38 on the side away from the cutting edge 21, and is inclined relative to the cutting edge surface in a direction away from the glove 1 toward the inside of the mold 10. The edge of the third inclined surface 39 on the side away from the cutting edge 21 extends toward the inside of the mold 10 beyond the edge 22a between the first inclined surface 22 and the second inclined surface 23 of the cutting / welding blade 20 of the mold 10. The third inclined surface 39 is positioned closer to the mold 10 than the cutting edge surface, and closer to the cutting edge surface than the edge 22a of the cutting / welding blade 20 of the mold 10.

[0035] It is desirable to provide a gap S or space K as shown in the figure between the fixed portion 32 of the auxiliary mold 30 and the cutting and welding blade 20 of the mold 10. By providing the gap S or space K in this manner, when the auxiliary mold 30 is fastened and fixed to the mold 10, the first contact surface 36 of the auxiliary mold 30 can be in good contact with the first inclined surface 22 of the mold 10, and the second contact surface 37 of the auxiliary mold 30 can be in good contact with the second inclined surface 23 of the mold 10. This allows the heat of the mold 10 to be efficiently transferred to the contact portion 34 of the auxiliary mold 30.

[0036] Next, the operation and effect when the glove 1 is manufactured using the mold 10 provided with the above-mentioned plurality of auxiliary molds 30 will be described. When the cutting and welding blade 20 (FIG. 3) of the mold 10 is pressed against the two overlapping films f1 and f2 in a region where the auxiliary mold 30 is not attached, the belt of the conveyor 6 elastically deforms, causing the cutting edge 21 of the cutting and welding blade 20 to slightly dig into the upper surface 6a of the belt of the conveyor 6, sandwiching the films f1 and f2 between them. At this time, because the first inclined surface 22 of the cutting and welding blade 20 is inclined from the cutting edge 21 toward the inside of the mold 10 in a direction away from the films f1 and f2, the greatest contact pressure acts on the cutting edge 21, and the film f1 comes into weak contact with the first inclined surface 22 or is not in contact at all. In this state, the heat of the cutting and welding blade 20 is transferred to the films f1 and f2.

[0037] As a result, the films f1 and f2 are melted and cut by the cutting edge 21 of the cutting and welding blade 20, which is pressed most strongly, and the portions of the films f1 and f2 that face or are in weak contact with the first inclined surface 22 of the cutting and welding blade 20 are welded by the radiant heat emitted from the cutting and welding blade 20. Since the first inclined surface 22 of the cutting and welding blade 20 is inclined in a direction gradually moving away from the glove 1 from the cutting edge 21 toward the inside of the glove 1, the amount of heat given to the films f1 and f2 via the first inclined surface 22 reaches a peak at the cutting edge 21 and gradually decreases toward the inside of the glove 1.

[0038] That is, when radiant heat is applied to the films f1 and f2 through the first inclined surface 22 connected to the cutting edge 21, the continuity of the seal portion inside the peripheral edge of the glove 1 in the width direction can be improved, and the problem of holes being formed in the seal portion can be suppressed. Therefore, when the mold 10 of this embodiment is used, poor welding of the seal portion on the peripheral edge of the glove 1 can be prevented, and high-quality gloves 1 can be manufactured.

[0039] Furthermore, as in this embodiment, by providing the cutting surface 24 of the cutting / welding blade 20 in a direction perpendicular to the cutting edge surface and inclining the first inclined surface 22 from the cutting edge 21 at one end of the cutting surface 24 in a direction away from the films f1, f2 toward the inside of the glove 1, it is possible to make the angle α of the cutting edge 21 an acute angle. By making the cutting edge 21 of the cutting / welding blade 20 an acute angle in this way, the films f1, f2 can be reliably cut along the periphery of the glove 1 and poor cutting of the films f1, f2 can be suppressed.

[0040] However, the angle α of the cutting edge 21 does not necessarily have to be an acute angle as in this embodiment, and it is sufficient if at least the first inclined surface 22 is inclined with respect to an imaginary horizontal plane. When the angle α of the cutting edge 21 is set to 90° or more, the cutting surface 24 of the cutting / welding blade 20 is inclined in a direction away from the films f1, f2 from the cutting edge 21 toward the outside of the glove 1.

[0041] The width of the seal portion around the periphery of the glove 1 can be adjusted by changing the inclination angle of the first inclined surface 22 of the cutting / welding blade 20. For example, increasing the inclination angle of the first inclined surface 22 relative to the cutting edge surface allows the cutting edge 21 to be sharpened, ensuring reliable cutting of the films f1 and f2. On the other hand, increasing the inclination angle of the first inclined surface 22 increases the distance between the first inclined surface 22 and the films f1 and f2, potentially preventing sufficient radiant heat from reaching the films f1 and f2, resulting in insufficient welding of the films f1 and f2. Specifically, even if the cutting edge 21 in contact with the films f1 and f2 can provide heat sufficient to melt the films f1 and f2, the width of the area where the first inclined surface 22 can provide sufficient radiant heat to weld the films f1 and f2 becomes narrower, resulting in a smaller seal width between the films f1 and f2.

[0042] In contrast, if the inclination angle of first inclined surface 22 with respect to the cutting edge surface is reduced, the angle α of cutting edge 21 increases accordingly, increasing the likelihood of poor cutting of films f1, f2. On the other hand, if the inclination angle of first inclined surface 22 is reduced, first inclined surface 22 can be positioned closer to films f1, f2 accordingly, expanding the width of the area where sufficient radiant heat can be applied to films f1, f2 to weld them together, and increasing the seal width of films f1, f2.

[0043] Therefore, it is desirable to adjust the inclination angle of the first inclined surface 22 relative to the cutting edge surface to an optimum value that can reliably cut the films f1 and f2 and achieve a desired seal width in the welded portion. In this embodiment, the inclination angle of the first inclined surface 22 of the cutting / welding blade 20 relative to the cutting edge surface is set in the range of 5° to 25° so that the peripheral edge of the glove 1 can be cut well and poor welding of the films f1 and f2 can be prevented.

[0044] The seal width of the films f1, f2 at the periphery of the glove 1 can also be adjusted by changing the width of the first inclined surface 22 of the cutting / welding blade 20 of the mold 10. In other words, by making the inclination angle of the first inclined surface 22 with respect to the cutting edge surface sufficiently small, the films f1, f2 can be welded with a seal width approximately the same as the width of the first inclined surface 22.

[0045] In this embodiment, in order to reliably adjust the seal width of the films f1, f2 to a desired width, a second inclined surface 23 is provided on the inside of the first inclined surface 22 of the cutting / welding blade 20, which is inclined further away from the glove 1 than the first inclined surface 22. In other words, by making the inclination angle of the second inclined surface 23 with respect to the cutting edge surface sufficiently larger than the inclination angle of the first inclined surface 22, the cutting / welding blade 20 can be kept away from the areas where welding of the films f1, f2 is not desired, and the seal width of the films f1, f2 can be made approximately the same width as the width of the first inclined surface 22.

[0046] The glove 1 manufactured by the manufacturing apparatus 100 of this embodiment needs to have its periphery sealed so that the finger insertion area is a narrow pouch. Therefore, it is important to adjust the seal width at the periphery of the finger insertion area to the desired width. In other words, if the finger insertion area seal width is too large, the space for inserting the fingers will be too narrow, making the glove difficult to use. Therefore, it is particularly important to control the seal width at the finger insertion area to the minimum seal width that will not cause holes. In this regard, the mold 10 of this embodiment solves this problem by providing the cutting and welding blade 20 with a first inclined surface 22 and a second inclined surface 23.

[0047] If the only purpose is to adjust the seal width of films f1 and f2 to a desired width, it is sufficient to provide a surface that is approximately parallel to the cutting surface 24 and continues from edge 22a of first inclined surface 22 on the side opposite cutting edge 21, without providing second inclined surface 23. However, if a surface that is parallel to movement direction P of mold 10 is provided from edge 22a of cutting / welding blade 20, the width of cutting / welding blade 20 will be narrowed, which will reduce the heat capacity of cutting / welding blade 20 and reduce the mechanical strength of cutting / welding blade 20.

[0048] For this reason, in this embodiment, a second inclined surface 23 is provided that is continuous with the edge 22a of the first inclined surface 22 and inclined toward the inside of the mold 10, thereby sufficiently increasing the width of the cutting and welding blade 20. In other words, in this embodiment, by providing the second inclined surface 23, the seal width of the welded portion of the films f1, f1 can be adjusted to a desired width, and the heat capacity of the cutting and welding blade 20 can be maximized, thereby sufficiently increasing the mechanical strength of the cutting and welding blade 20.

[0049] The second inclined surface 23 of the cutting / welding blade 20 is provided for the purpose of preventing poor welding of the films f1 and f2 and improving the quality of the glove 1. If, instead of providing the second inclined surface 23, a surface parallel to the cutting surface 24 were provided continuously to the edge 22a of the first inclined surface 22, the angle at the edge 22a between this surface and the first inclined surface 22 would be smaller than in the case where the second inclined surface 23 is provided. In this case, when the cutting edge 21 of the cutting / welding blade 20 is pressed against the films f1 and f2 and the cutting edge 21 bites into the belt of the conveyor 6, the corners of the edge 22a will come into strong contact with the films f1 and f2, which may cause the films f1 and f2 to melt at these locations and form holes. Therefore, in this embodiment, a second inclined surface 23 is provided that is continuous with the first inclined surface 22 at the edge 22a, and the angle β at the edge 22a between the first inclined surface 22 and the second inclined surface 23 is made relatively large to prevent the problem of undesired holes being formed in the films f1 and f2 in this area.

[0050] In this embodiment, in order to make the width of the cutting / welding blade 20 as large as possible, the sum of the angle α of the cutting edge 21 and the angle β between the first inclined surface 22 and the second inclined surface 23 is set to 180° or more. As a result, the second inclined surface 23 is inclined in a direction that spreads away from the glove 1 with respect to the cutting surface 24 of the cutting / welding blade 20, which increases the mechanical strength of the cutting / welding blade 20 and makes it possible to sufficiently increase the heat capacity of the cutting / welding blade 20, thereby enabling the cutting edge 21 of the cutting / welding blade 20 to be heated effectively.

[0051] In addition, the first inclined surface 22 and the second inclined surface 23 of the cutting / welding blade 20 function as heat transfer surfaces for thermally adhering the auxiliary mold 30 to the mold 10. As shown in Fig. 4, when the auxiliary mold 30 is fastened to the mold 10 using screws 40, the first contact surface 36 of the auxiliary mold 30 comes into surface contact with the first inclined surface 22 of the cutting / welding blade 20 of the mold 10, and the second contact surface 37 of the auxiliary mold 30 comes into surface contact with the second inclined surface 23 of the cutting / welding blade 20. The direction in which the auxiliary mold 30 is fixed to the mold 10 by the screw 40 is parallel to the movement direction P of the mold 10, so by tightening the screw 40, the first contact surface 36 of the auxiliary mold 30 is pressed against the first inclined surface 22 of the mold 10, and the second contact surface 37 of the auxiliary mold 30 is pressed against the second inclined surface 23 of the mold 10, so that the contact portion 34 of the auxiliary mold 30 is in close contact with the cutting and welding blade 20 of the mold 10.

[0052] This allows the heat from the cutting / welding blade 20 of the mold 10 to be transferred well to the contact portion 34 of the auxiliary mold 30, and the contact portion 34 of the auxiliary mold 30 can be effectively heated to the desired temperature.

[0053] When the part of the mold 10 to which the auxiliary mold 30 is attached is pressed against the films f1 and f2, the cutting edges 21 of the mold 10 arranged on the cutting edge surface are pressed against the films f1 and f2, and the films f1 and f2 are cut into the shape of the glove 1. At this time, the part of the first inclined surface 22 that is exposed and not covered by the contact part 34 of the auxiliary mold 30, the tip surface 38 of the contact part 34 of the auxiliary mold 30, and the third inclined surface 39 are positioned slightly farther from the glove 1 than the cutting edge surface, and radiant heat is applied to the films f1 and f2 from the first inclined surface 22, the tip surface 38, and the third inclined surface 39.

[0054] As described above, the inner edge of the third inclined surface 39 of the auxiliary mold 30 extends further inward than the inner edge 22a of the first inclined surface 22 of the cutting and welding blade 20 of the mold 10, and the inner edge of the third inclined surface 39 is located closer to the cutting edge surface than the inner edge 22a of the first inclined surface 22, so that the seal width of the films f1 and f2 in the area where the auxiliary mold 30 is provided can be wider than the seal width in the area where the auxiliary mold 30 is not provided. The seal width of the films f1 and f2 in the area where the auxiliary mold 30 is provided can be adjusted to a desired width by changing the width and / or inclination angle of the tip surface 38 and / or the third inclined surface 39 of the auxiliary mold 30.

[0055] The present invention has been described above based on the embodiments, but the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications and applications are possible within the scope of the gist of the present invention.

[0056] For example, in the above-described embodiment, the case where the glove 1 is manufactured using the biodegradable films f1 and f2 has been described, but the present invention can also be applied to a mold for manufacturing gloves using other non-biodegradable synthetic resin films.

[0057] The angle α of the cutting edge 21 of the mold 10 is not limited to an acute angle, and may be any angle that can cut the films f1 and f2 well. The auxiliary mold 30 does not need to be attached separately from the mold 10, and may be formed integrally with the mold 10. The inventions described in the claims of the present application as originally filed are as follows: [1] A glove mold for manufacturing gloves by cutting two layers of film into a hand shape and welding the peripheral portions thereof, a cutting and welding blade that is continuous along the peripheral edge of the glove, excluding the insertion opening for inserting the hand; A cross section of the cutting / welding blade taken along a plane perpendicular to the direction along the peripheral edge of the glove has a first line inclined at a first angle from the cutting edge that contacts the peripheral edge of the glove towards the inside of the glove in a direction away from the glove, and a second line inclined at a second angle greater than the first angle from the end of the first line opposite the cutting edge in a direction further away from the glove, Mold for gloves. [2] the cross section of the cutting / welding blade has a third line on its outer periphery extending from the cutting edge in the direction of movement of the glove mold; the sum of the angle of the cutting edge between the first line and the third line and the angle between the first line and the second line is greater than 180°; [1] A glove mold according to the present invention. [3] The angle of the cutting edge is an acute angle. [2] A glove mold according to the present invention. [4] The cutting / welding blade further includes an auxiliary mold that is in contact with a first inclined surface of the cutting / welding blade formed by moving the first line along the peripheral edge portion and is positioned on the first inclined surface side of a plane including a ridge line of a hand shape formed by moving the cutting edge along the peripheral edge portion. [1]-[3] A glove mold according to any one of the items. [5] the auxiliary mold has a first contact surface that contacts the first inclined surface, and a second contact surface that contacts the second inclined surface of the cutting / welding blade that is formed by moving the second line along the peripheral edge portion; [4] A glove mold according to the present invention. [6] [1] Heating the cutting edge of the cutting / welding blade of the glove mold to a melting temperature of the film, Press the heated blade against the two layers of film to cut along the periphery of the glove; applying radiant heat to the two layers of film via a first inclined surface of the cutting / welding blade formed by moving the first line along the peripheral edge portion, thereby welding the two layers of film inside the peripheral edge portion; How gloves are manufactured. [Explanation of symbols]

[0058] 6...conveyor, 6a...upper surface, 10...mold, 12...heater, 20...cutting / welding blade, 21...blade tip, 22...first inclined surface, 22a...edge, 23...second inclined surface, 30...auxiliary mold, 34...contact portion, 36...first contact surface, 37...second contact surface, 38...tip surface, 39...third inclined surface, 40...screw, 100...manufacturing apparatus, f1, f2...biodegradable film, F1, F2...film roll, L1...first wire, L2...second wire.

Claims

1. A glove mold for manufacturing gloves by cutting two layers of film into a hand shape and welding the peripheral portions of the cut film, a cutting / welding blade that is continuous along the peripheral edge of the glove, excluding the insertion opening for inserting the hand; A cross section of the cutting / welding blade taken along a plane perpendicular to the direction along the peripheral edge of the glove has a first line inclined at a first angle from the cutting edge that contacts the peripheral edge of the glove towards the inside of the glove in a direction away from the glove, a second line inclined from the end of the first line opposite the cutting edge at a second angle greater than the first angle in a direction further away from the glove, and a third line extending from the cutting edge in the direction of movement of the glove mold, the first angle being within a range of 5° to 25°, and the angle of the cutting edge between the first line and the third line being within a range of 65° to 85°. Mold for gloves.

2. The sum of the angle of the cutting edge and the angle between the first line and the second line is greater than 180°; The glove mold according to claim 1.

3. The cutting / welding blade further includes an auxiliary mold that is in contact with a first inclined surface of the cutting / welding blade formed by moving the first line along the peripheral edge portion and is positioned on the first inclined surface side of a plane including a ridge line of a hand shape formed by moving the cutting edge along the peripheral edge portion. The glove mold according to claim 1 or 2.

4. the auxiliary die has a first contact surface that contacts the first inclined surface, and a second contact surface that contacts the second inclined surface of the cutting / welding blade that is formed by moving the second line along the peripheral edge portion; The glove mold according to claim 3.

5. 2. The glove mold of claim 1, wherein the cutting edge of the cutting / welding blade is heated to a melting temperature of the film, Pressing the heated blade against the two layers of film to cut along the periphery of the glove; applying radiant heat to the two layers of film via a first inclined surface of the cutting / welding blade formed by moving the first line along the peripheral edge portion, thereby welding the two layers of film inside the peripheral edge portion; How gloves are manufactured.

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