WO2015052756A1

WO2015052756A1 - Retainer for slide fastener opener and retainer manufacturing method

Info

Publication number: WO2015052756A1
Application number: PCT/JP2013/077255
Authority: WO
Inventors: 雅道長谷川
Original assignee: Ykk株式会社
Priority date: 2013-10-07
Filing date: 2013-10-07
Publication date: 2015-04-16
Also published as: CN105658107A; TW201521624A; CN105658107B; TWI526167B

Abstract

Provided is a retainer for which consideration has been given to make gate marks less noticeable. A resin retainer for a slide fastener opener is provided with a retainer pin (31) to be disposed parallel to the front of the separable pin (3a) and a retainer body (32) with a separable pin hole (42) into which the back of the separable pin (3a) is inserted, and a tape groove (41), which communicates with the separable pin hole (42), is formed on either the left or right side surface of the retainer body (32). The retainer for the slide fastener opener is characterized in having a gate mark (36c) towards the back of the direction in which the tape groove (41) of the retainer body (32) extends.

Description

Opening box for slide fastener and method for manufacturing the box

The present invention relates to a slide fastener opening device box made of resin and a method of manufacturing the box.

As shown in FIG. 10, the opening device for the slide fastener is fixed to parallel first and

second tapes

91 and 92 extending in the front-rear direction, and in the width direction (left-right direction) of the first tape 91. The wing stick 93 is fixed to the second tape 92 side, and the box 94 is fixed to the first tape 91 side in the width direction of the second tape 92. The box 94 includes a box 95 and a box bar 96 protruding from the second tape side on the front surface of the box 95. The box body 95 includes a butterfly pin hole 93a into which the rear portion of the butterfly rod 93 is inserted on the first tape side on the front surface, and the first tape 91 side surface of the left and right side surfaces has a first tape side. A tape groove 91a into which the tape 91 is inserted is provided. In the illustrated example, the tape groove 91a is formed in the middle of the thickness of the box 95 (the dimension in the thickness direction of the tape = the dimension in the vertical direction).

Also, one method of molding a box having such a configuration is injection molding with resin. In the injection molding, the molten resin is injected from the gate into the cavity, so that a gate mark (gate mark) is formed in the box. More specifically, when injection molding is performed, the resin is cured in the cavity to form a box, and the resin is cured in the gate to become a gate resin portion, and the gate resin portion is continuously formed in the box. . When the gate resin portion is separated from the box, gate marks are formed on the box. Therefore, the position of the gate with respect to the cavity is important in the mold design. And the position of the conventional gate mark was formed above or below the tape groove (Patent Documents 1 and 2). In FIG. 10, the position of the gate mark 95a is shown above the tape groove 91a.

Chinese Patent Application No. 102120354, FIG. Chinese Patent Application No. 1292241, FIG.

By the way, in the above-mentioned conventional box, the tape groove is a dark space because it leads to the pin hole. On the other hand, the portion along the tape groove (the upper surface and the lower surface with respect to the tape groove) of the left and right side surfaces of the box is a surface that is relatively bright and easily visible since the space of the tape groove is dark. . As described above, the conventional box has a gate mark on a bright and easily visible surface, and as a result, the gate mark becomes conspicuous.

In the conventional box, a flow mark indicating a trace of the molten resin may be formed on the surface of the box. Incidentally, in the case of the conventional box, when judging from the position of the gate mark, the gate is formed on the upper side or the lower side (specified as the upper side in the following description) in the injection molding. Then, the molten resin injected from the gate into the cavity passes through the space corresponding to the upper side of the box, and changes the traveling direction after colliding with the surface opposite to the tape groove. That is, the molten resin injected into the cavity from the gate changes its direction after traveling the lateral width of the box. In order to suppress the generation of flow marks, it is desirable to shorten the distance until the molten resin changes its traveling direction as much as possible.

The present invention was created in view of the above circumstances, and an object of the present invention is to provide a box in which at least a gate mark is not noticeable, and a method for manufacturing the box.

The slide fastener box of the present invention is made of resin, and includes a box bar arranged in parallel with the front part of the butterfly bar and a box body having a butterfly bar hole into which the rear part of the butterfly bar is inserted. And the box groove | channel is formed in one side surface among the right-and-left side surfaces of a box body in the tape groove | channel connected to a butterfly pin hole. In addition, a gate mark is formed behind the groove width range of the tape groove of the box.

The side surface on the tape groove side of the box may be flat or uneven, but the following is desirable to make the gate traces inconspicuous.
That is, the box body has a side recess as a recess communicating with the tape groove at the rear of the tape groove in the extending direction, a flat portion at a peripheral portion of the side recess and a portion along the tape groove, and a bottom surface of the side recess. It has a gate mark.

Although the rear surface of the box may be completely closed, it is desirable to suppress the generation of flow marks that tend to appear on the outer surface of the box as follows.
That is, a slide hole for inserting the first slide for resin molding from the rear side is formed on the rear surface of the box body so as to communicate with the rear side of the butterfly pin hole.

Further, the box bar and the box body may have a vertically asymmetric shape. However, in order to make it easy to suppress the generation of the flow mark while making the gate mark inconspicuous, it is desirable to do the following.
In other words, the box bar and the box body have a vertically symmetrical shape.

The manufacturing method of the slide fastener opening device box forming the box of the present invention described above includes a fixed mold, a movable mold provided to be reciprocable in the vertical direction with respect to the fixed mold, and a fixed mold. On the other hand, the 1st and 2nd slide provided so that a reciprocation is possible in the front-back direction is used. In the mold clamping step, the first slide moves forward and the second slide moves backward so that the gate connected to the cavity from which the molten resin is injected is positioned at the rear side in the tape groove extending direction. Formed. In the injection process after the mold clamping process, the molten resin is injected from the gate, and the molten resin collides with the first slide.

According to the slide fastener opening device box of the present invention, the gate trace formed on the tape groove side of the left and right side surfaces of the box body is provided behind the tape groove extending direction which is a dark space. .

If the box is provided with a side recess as a recess communicating with the tape groove on the rear side in the extending direction of the tape groove, and a flat portion in the peripheral portion of the side recess and the portion along the tape groove, the dark space is obtained. Since the tape groove and the side recess are continuous and a sense of unity is exhibited and the bottom surface of the side recess has a gate mark, the gate mark is difficult to stand out.

Furthermore, if the rear surface of the box is formed with a slide hole for inserting the first slide for resin molding from the rear in a state communicating with the rear of the butterfly pin hole, it can be judged from the position of the gate mark. Furthermore, to mold this box, the molten resin injected from the position of the gate mark collides with the first slide that forms the outer shape of the slide hole, and changes the direction of travel after the collision to correspond to the shape of the box Therefore, the distance until the molten resin first collides is shorter than that of the conventional product, and the flow mark is hardly formed on the box.

Also, if the box bar and the box are symmetrically formed, the flow of the molten resin after colliding with the first slide becomes vertically symmetric, so that the flow mark is hardly formed on the box.

It is a perspective view which shows the slide fastener containing the box of 1st embodiment of this invention. (A) A figure is a top view in which a slide fastener containing a box of a first embodiment of the present invention is closed, and (b) figure is a top view which made a part of (a) figure a sectional view. It is a top view which shows the state which the slide fastener containing the box of 1st embodiment of this invention opened, Comprising: A part of slide fastener is made into sectional drawing. FIGS. 4A to 4D are a plan view, a right side view, a front view, and a cross-sectional view taken along line AA, showing a box according to a first embodiment of the present invention in order. It is a perspective view which shows the box of 2nd embodiment of this invention. It is a perspective view which shows the molding die used for the box of 2nd embodiment of this invention. (A), (b) figure is a side view and a top view which show the 1st and 2nd slide at the time of a mold open state, and (c) figure is a front view of a 1st slide in order. (A), (b) figure is a side view and a top view which show the 1st and 2nd slide at the time of a mold clamping state in order. It is process drawing which shows the procedure of the injection molding method. It is a perspective view which shows the slide fastener containing an example of the conventional box.

As shown in FIGS. 1 to 3, the slide fastener 1 includes two

fastener stringers

2a and 2b having a longitudinal direction in the front-rear direction and a width direction in the left-right direction, and two fastener stringers 2a arranged facing the left and right. , 2b, a slider (not shown) is provided as a basic configuration. In this example, a direction in which the two

fastener stringers

2a and 2b are closed is a front direction and a direction in which the two

fastener stringers

2a and 2b are opened is a rear direction in the front-rear direction in which the slider is slid. In the following description, the front direction in the front-rear direction is the downward direction in FIG. 2, and the rear direction is the upward direction in FIG. Of the left and right directions, the left direction is the left direction in FIG. 2, and the right direction is the right direction in FIG. In addition, the up direction among the up and down directions which are the directions orthogonal to the front and rear direction and the left and right direction is a front direction with respect to the paper surface of FIG. 2, and the downward direction is a rear side direction with respect to the paper surface of FIG. .

Each

fastener stringer

2a, 2b is a long strip-shaped (elongated rectangular)

tape

21a, 21b, the

tape

21a, 21b having the longitudinal direction in the longitudinal direction and the width direction in the lateral direction, and the

tapes

21a, 21b. And a large number of elements 22 fixed at intervals along one end in the width direction, and a plurality of elements 22 form an element row in a row. Each element 22 is made of resin, for example. The two

fastener stringers

2a and 2b are provided with one opening tool 3 in addition to the two opposing

tapes

21a and 21b and the two opposing element rows (a large number of elements 22).

The opening tool 3 is fixed to the rear ends of the two

tapes

21a and 21b, and more specifically, is fixed with a space behind the two element rows. The opening tool 3 is composed of a butterfly pin 3a fixed to one of the two

tapes

21a and 21b and a box 3b fixed to the other. Hereinafter, the tape 21a to which the butterfly stick 3a is fixed is referred to as a first tape, and the tape 21b to which the box 3b is fixed is referred to as a second tape.

The butterfly stick 3a is a rod-like object extending in the front-rear direction. With respect to the front-rear direction, the butterfly stick 3a is fixed to the rear end portion of the first tape 21a, more specifically at a rearward interval with respect to the element row. Further, the butterfly stick 3a is fixed to the end portion on the second tape 21b side in the width direction of the first tape 21a in the left-right direction. Furthermore, the butterfly stick 3a is fixed so as to sandwich the first tape 21a in the middle part of its full height (vertical width) in the vertical direction parallel to the thickness direction of the first tape 21a. In other words, the end on the second tape 21b side in the width direction of the first tape 21a is embedded in the butterfly stick 3a.

As shown in FIGS. 1 to 4, the box 3b of the first embodiment of the present invention is parallel to one direction in the left-right direction (the second tape 21b side) with respect to the front portion of the butterfly stick 3a extending forward and backward. And a box body 32 having a wing pin hole 42 into which the rear part of the wing pin 3a is inserted. A butterfly pin hole 42 is formed on the front surface of the box body 32 in a portion of the left and right direction opposite to the one direction (on the first tape 21a side). Thus, the box bar 31 is joined to the portion on the second tape 21b side in the left-right direction so as to protrude forward.

The box 3b is fixed to the rear end portion of the second tape 21b with respect to the front-rear direction, more specifically at a rearward interval with respect to the element row. Moreover, the box 3b is being fixed to the edge part by the side of the 1st tape 21a among the width directions of the 2nd tape 21b regarding the left-right direction. Further, with respect to the vertical direction, the box 3b (box bar 31 and box 32) is fixed so as to sandwich the second tape 21b at the intermediate portion of the entire height. In other words, the end on the second tape 21 b side in the width direction of the second tape 21 b is embedded in the box bar 31 and the box body 32.

The box bar 31 extends from the front end of the box bar main body 31a extending in the front-rear direction to the first tape 21a side of the left side of the box bar main body 31a. A locking portion 31b that protrudes laterally toward the side is provided. The locking portion 31b is formed in the middle portion of the full width of the box bar 31. A locking groove 31c for receiving the locking part 31b is formed in a recessed manner at the front end of the left and right side surfaces of the butterfly bar 3a on the surface on the second tape 21b side for the box bar 31.

The box 32 is a hexahedron having upper, lower, left and right front and back surfaces. Each surface is formed in a planar shape in the illustrated example. The flat shape includes not only a flat surface but also a curved surface (a surface that swells in an arc and a surface that is recessed in an arc). For example, in the illustrated example, the upper surface and the lower surface are surfaces that bulge out of surfaces that are curved in an arc shape (more specifically, for example, the upper surface is a surface that bulges gradually from both ends of the full width toward the middle). Moreover, the box 32 is provided with the tape groove | channel 41 in which the 1st tape 21a is inserted in the side surface at the side of the 1st tape 21a among right-and-left side surfaces. The tape groove 41 is a groove that extends in the front-rear direction and opens the front and closes the rear. A butterfly pin hole 42 communicates with the tape groove 41 on the second tape 21b side, and the front of the butterfly pin hole 42 is open. On the other hand, the first tape 21a side is closed and the second tape 21b side penetrates behind the butterfly pin hole 42.

The box body 32 includes an extension wall 33 extending rearward from the rear end of the box bar 31, and first and second protrusions projecting in parallel to the first tape 21 a side in the left-right direction from the upper and lower ends of the extension wall 33. A first wall 21, a first wall 21, a first tape 21 a side end of the first wall 21, and a first wall 21, a joining wall 36 that joins the first and

second barrel walls

34, 35 at the rear end of the total length in the front-rear direction; And a groove wall 37 protruding from the end of the

second body wall

34, 35 on the first tape 21a side so as to narrow a vertical space formed between the first and

second body walls

34, 35, 37. A space formed between the upper and lower groove walls 37 is a tape groove 41. Incidentally, each groove wall 37 in the illustrated example is formed over the entire range in front of the joining wall 36 in the total length in the front-rear direction of the first and

second trunk walls

34, 35. Therefore, the joining wall 36 is continuous behind the upper and lower groove walls 37. Further, the box 3b of this embodiment has a vertically symmetric shape, and therefore the tape groove 41 is disposed at the middle part of the entire height of the box 3b.

The extension wall 33 is a rod having a rectangular cross section. The left and right widths of the extension wall 33 are formed wider than the box bar 31 in the illustrated example, and the surface on the first tape 21a side (the surface on the butterfly bar hole 42 side) of the left and right side surfaces of the extension wall 33 is a box. It is formed substantially flush with the corresponding surface of the bar 31, and the surface on the second tape 21 b side of the left and right side surfaces of the extension wall 33 protrudes to the side of the box bar 31. The vertical width of the extension wall 33 is the same as the vertical width of the box bar 31. The first and

second body walls

34 and 35 projecting sideways from the upper and lower ends of the extension wall 33 are both plate-shaped.

The joining wall 36 includes a groove closing portion 36a for closing the rear side of the tape groove 41 and a hole closing portion 36b for closing the first tape 21a side behind the hinge pin hole 42. Therefore, the space surrounded by the joining wall 36 (hole closing portion 36b), the extension wall 33, the first body wall 34, and the second body wall 35 is a first slide for resin molding (not shown in FIG. 1). The slide hole 43 is in communication with the butterfly pin hole 42. The side surface of the joining wall 36 is a surface on the tape groove 41 side of the left and right side surfaces of the box body 32, and is a side surface that forms the rearward direction of the tape groove 41 and the rearward direction of the upper and lower groove walls 37. A gate mark 36 c is formed on the side surface of the joining wall 36.

The gate mark 36c is a surface of the joining wall 36 (groove closing portion 36a) on the first tape 21a side, and is formed behind the tape groove 41 in the extension direction, in other words, behind the groove width range W of the tape groove 41. ing. Further, the gate mark 36 c is formed at the front end of the bonding wall 36 in the front-rear direction. In other words, the gate mark 36 c is formed at the front end portion of the side surface that forms the rear side in the extending direction of the tape groove 41 on the tape groove 41 side of the left and right side surfaces of the box body 32. More specifically, the front end of the gate mark 36 c coincides with the front end of the bonding wall 36. In addition, the center of the gate mark 36c in the vertical direction coincides with the middle point of the groove width range W. By the way, the gate mark 36c is a circular area that is flush with the surface on the first tape 21a side of the joining wall 36 in the illustrated example, but this is not limiting, and depending on the molding process, It may be a small protrusion.

In the above-described box 3b of the first embodiment of the present invention, the gate mark 36c is hardly noticeable. The first reason is that a gate mark 36c is provided behind the tape groove 41, which is a dark space, in the extending direction. The second reason is that the center of the gate mark 36c coincides with the midpoint of the groove width range W, and the tape groove 41 and the gate mark 36c have a sense of unity. Furthermore, the third reason is that the front end of the gate mark 36c coincides with the front end of the bonding wall 36, and the tape groove 41 and the gate mark 36c have a sense of unity.

The box 3b of the second embodiment of the present invention is different from the box 3b of the first embodiment as shown in FIG. 5 in that the first tape 21a for the butterfly pin 3a of the left and right side surfaces of the box body 32 is used. The side surface is provided with side recesses 36 d that are recessed from the groove walls 37 (more specifically, stepped) behind the tape grooves 41 in the extending direction of the tape grooves 41, and portions of the groove walls 37 (along the tape grooves 41). Part) and the peripheral part of the side recess 36d (in the drawing, the part along the top and bottom of the side recess 36d).

In the vertical direction, the side recesses 36 d are formed for the entire range of the groove width range W of the tape groove 41. With respect to the front-rear direction, the side recess 36d is formed over the entire length of the longitudinal direction of the joining wall 36. Therefore, the front of the side recess 36d is open, and the side recess 36d and the tape groove 41 communicate with each other. It has become. A gate mark 36c is formed on the bottom surface of the side recess 36d (that is, the surface on the first tape 21a side). Further, the front end of the gate mark 36c coincides with the front end of the side recess 36d. In addition, the center of the gate mark 36c in the vertical direction coincides with the midpoint of the overall height of the side recess 36d having the same vertical width as the groove width range W.

The planar portion 38 is a planar portion, and the planar shape includes not only a plane as described above but also a curved surface (a surface that swells in an arc and a surface that is recessed in an arc). .

Since the box 3b according to the second embodiment of the present invention is formed so that the side recess 36d communicates with the tape groove 41, the tape groove 41 and the side recess 36d have a sense of unity. It is visually recognized as a part of the groove 41. In addition, since the side recess 36d is formed corresponding to the entire range of the groove width W of the tape groove 41 in the vertical direction, the sense of unity between the tape groove 41 and the side recess 36d is further improved. Moreover, since the planar part 38 is provided above and below the tape groove 41 and the side recess 36d, it becomes a form like three lines. Accordingly, the gate mark 36c formed in the side recess 36d is not easily noticeable.

The method for manufacturing the box 3b of the first and second embodiments of the present invention described above uses injection molding using a resin as a raw material. Below, the manufacturing method of the box 3b of 2nd embodiment is described. As shown in FIG. 6, an injection mold used in this manufacturing method includes a fixed mold 5, a movable mold 6 supported so as to be reciprocable in the vertical direction with respect to the fixed mold 5, and a fixed mold. First and

second slides

7 and 8 that can reciprocate in the front-rear direction with respect to the mold 5 are provided.

The injection mold has a cavity 11 as a space corresponding to the shape of the box 3b and a gate 12 that forms the outer shape of the gate resin portion 12r connected to the gate mark 36c in the clamped state, and serves as a passage leading to the cavity 11. The gate 12 and a runner 13 as a passage leading to the gate 12 are formed.

The cavity 11 includes a box bar recess 31x that forms the outer shape of the box bar 31, a box recess 32x that forms the outer surface (so-called six sides) of the outer shape of the box body 32, and a convex portion that forms the inner surface of the outer shape of the box body 32. It has.

The box body recess 32x is an extension that forms the outer surface of the extension wall 33 (the surface on the second tape 21b side of the left and right side surfaces of the box body 32, a part of the front surface of the box body 32, and a part of the rear surface of the box body 32). A wall recess 33x, first and second barrel wall recesses 34x and 35x forming the outer surfaces of the first and

second barrel walls

34 and 35, respectively, and an outer surface of the joining wall 36 (a part of the rear surface of the box 32 and A junction wall recess 36x that forms a part of the side surface) and a groove wall recess 37x that forms the outer surface of the groove wall 37 (a part of the side surface of the box 32). In FIG. 6, the first body wall recess 34x is not shown.

The convex portion includes a tape groove convex portion 41 x that forms the tape groove 41, a butterfly pin convex portion 42 x (see FIG. 8) that forms the pin hole 42, and a slide hole convex portion 43 x that forms the slide hole 43. .

In this embodiment, the parting line formed in the product box 3b is an intermediate position of the entire height of the box 3b. Therefore, the fixed mold 5 and the movable mold 6 are formed in a vertically symmetrical shape. The Then, on the surface of the fixed mold 5 (the surface facing the movable mold 6), there are a box bar half-recess 31y that is the lower half of the box bar recess 31x and a box half-recess 32y that is the lower half of the box recess 32x. Among them, the second body wall recess 35x and the extension wall half recess 33y which is the lower half of the extension wall recess 33x and the runner half recess 13y which is the lower half of the runner 13 are formed in a depressed state.

A tape placement half recess 21y, which is the lower half of the tape placement recess 21x for placing the second tape 21b, is provided on the surface of the fixed mold 5 on the side of the box bar half recess 31y and the extension wall half recess 33y. It is formed in such a way that it is depressed in the direction (on the side opposite to the runner half-recess 13y) and in the front-rear direction. The depth of the tape placement half recess 21y is half the thickness of the second tape 21b. Of the left and right end portions of the second tape 21b, the end portion to which the element 22 is fixed is formed thicker in the tape thickness direction than the other portions. In order to position the thick portion, a part (positioning portion) 21z of the tape placement half recess 21y is formed deep.

Also, on the surface of the fixed mold 5, first and second

reciprocating recesses

7y and 8y for moving the lower half of the first and

second slides

7 and 8 to be reciprocated communicate with the front and rear and a box The body half recess 32y is also formed in communication. More specifically, the first and second

reciprocating recesses

7y and 8y are formed to communicate with the opposite side of the tape mounting half recess 21y in the left-right direction of the box half recess 32y.
The first reciprocating recess 7y communicates with the extension wall half recess 33y on the opposite side of the tape placement half recess 21y, and is formed with communication with the second trunk wall recess 35x rearward.
The second reciprocating recess 8y is formed at a distance from the box bar half recess 31y on the side opposite to the tape mounting half recess 21y. More specifically, the second reciprocating recess 8y is formed on the side of the left and right walls constituting the box bar half recess 31y on the side opposite to the wall 31z opposite to the tape mounting half recess 21y. . The second reciprocating recess 8y is formed so as to communicate with the front and the side (the side opposite to the extension wall half recess 33y) with respect to the second body wall recess 35x in the box half recess 32y.

Since the movable mold 6 is symmetrical with the fixed mold 5, the first body wall recess 34 x and the extension wall recess 33 x are formed on the surface of the movable mold 6 (the surface that abuts against the fixed mold 5). The upper half, the upper half of the box bar recess 31x, the upper half of the tape mounting recess 21x, and the upper half of the runner 13 are formed.

The first slide 7 is the rear surface side of the box 32 and mainly forms the rear surface of the joint wall 36 (more specifically, the end portion of the rear surface side of the extension wall 33 and the joint wall 36 at the end of the butterfly pin 42 side). The first base body 71, the first slide main body 72 projecting forward from the tape placement half recess 21 y in the left-right direction on the front surface of the first base section 71, and the side surface of the box body 32. A first side surface forming portion 73 that forms a side surface (side surface on the tape groove 41 side) of the joining wall 36 and that protrudes forward from the first base portion 71. Yes. Note that a side convex portion 36v forming a side concave portion 36d of the joining wall 36 is formed on the first slide main body 72 side surface of the first side surface forming portion 73 on the intermediate portion of the entire height over the entire length of the first side surface forming portion 73. Is formed to protrude.

The first slide main body 72 has a rod shape extending in the front-rear direction (more specifically, a rod shape having a rectangular cross section), a slide hole convex portion 43x projecting forward from the first base portion 71, and a butterfly pin convex portion. 42x includes an anti-tape groove side partial convex portion 42y that forms a portion on the opposite side of the tape groove 41, and an anti-tape groove side partial convex portion 42y protruding forward from the slide hole convex portion 43x. Incidentally, the front end surface of the anti-tape groove side convex portion 42y is a surface that abuts against the wall 31z on the opposite side to the tape placement half concave portion 21y of the left and right walls constituting the box bar half concave portion 31y.

The second slide 8 is a tape groove 41 on the front side of the box body 32, which forms the tape groove 41 more than the extension wall 33, and the tape groove 41 on the left and right sides of the pinhole protrusion 42x. The groove side partial convex part 42z which forms the side, the tape groove convex part 41x, and the 2nd side surface formation part 83 which forms the side surface of the groove wall 37 among the side surfaces of the box 32 are provided. A second slide main body portion 82 is formed by the groove side convex portion 42z and the tape groove convex portion 41x. And the groove side partial convex part 42z, the tape groove convex part 41x, and the 2nd side surface formation part 83 are made into the 2nd base part in order toward the opposite side (runner 13 side) from the box stick recessed part 31x side in the left-right direction. 81 protrudes rearward from the rear surface. The rear end surface of the groove-side partial convex portion 42z, the tape groove convex portion 41x, and the second side surface forming portion 83 are flush with each other in the left-right direction.
The groove-side partial convex portion 42z is in surface contact with the side surface of the anti-tape groove-side partial convex portion 42y, thereby forming a pin hole convex portion 42x.
In addition, the groove side partial convex portion 42z, the tape groove convex portion 41x, and the second side surface forming portion 83 form space portions corresponding to the shape of the groove wall 37 above and below the tape groove convex portion 41x. Accordingly, the tape groove convex portion 41x is formed in a step difference in the vertical direction with respect to the groove side partial convex portion 42z and the second side surface forming portion 83. In other words, the tape groove convex portion 41x is arranged in the middle portion of the entire height of both the groove side partial convex portion 42z and the second side surface forming portion 83.

Further, the gate 12 is formed on the surface where the first and second side

surface forming portions

73 and 83 abut each other as shown in FIGS. The gate 12 extends in the left-right direction, and the shape of the inlet portion and the outlet portion of the molten resin in the gate 12 is irregularly formed (in the example shown, the shape of the inlet portion is circular and the shape of the outlet portion is rectangular). It is. In addition, the inlet portion of the molten resin in the gate 12 is formed with a recess inlet recess 12x corresponding to half of the shape of the inlet portion in the first and second side

surface forming portions

73 and 83, respectively, and the outlet of the molten resin in the gate 12 is formed. The second side surface forming portion 83 includes a flat surface 12z (see FIGS. 7 and 8) that closes the outlet concave portion 12y while forming a recessed outlet concave portion 12y only in the first side surface forming portion 73. It is as.

In a state where the above-described injection mold is clamped, the movable mold 6 is abutted against the fixed mold 5 and the first slide main body 72 of the first slide 7 moved forward is the fixed mold. The second slide 8 is brought into contact with the mold 5 and is moved backward to the first slide 7. The first and

second slides

7 and 8 are brought into contact with each other, so that the joining wall space 36s corresponding to the shape of the joining wall 36 becomes the first slide 7 (the slide hole convexity of the first slide main body 72). Portion 43x, first base portion 71, first side surface forming portion 73), second slide 8 (groove side partial convex portion 42z of butterfly hole convex portion 42x, and tape groove convex portion in second slide 8) 41x and the rear end face). The joining wall space 36s is a space corresponding to the shape of the groove closing part 36a and the hole closing part 36b of the joining wall 36, and is behind the portion of the cavity 11 on the tape groove 41 side in the butterfly pin hole 42. And a closed space corresponding to the shape of the portion that closes the rear of the tape groove 41.

An embodiment of a method for forming the box 3b using the injection mold described above will be described. (1) First, as shown in FIG. 9A, the injection mold is in an open state. Then, as shown in FIG. 9B, a step of placing the second tape 21b on the fixed mold 5 is performed. Specifically, one end portion in the left-right direction of the second tape 21b is placed on the positioning portion 21z (see FIG. 6) of the tape mounting recess 21x of the fixed mold 5 for positioning. Thereby, one side in the width direction of the second tape 21 b is arranged on the cavity 11 side, and the other side in the width direction is arranged on the side away from the cavity 11. Incidentally, at this time, in the present embodiment, as shown in FIG. 6, the first slide 7 is disposed in a state of being retracted rearward from the second body wall recess 35x (returning state), and the second slide 8 is It is assumed that the second body wall recess 35x is disposed in a state retracted forward (returned state).
(2) Next, a mold clamping process is performed as shown in FIG. Specifically, the movable mold 6 is moved forward with respect to the fixed mold 5, and both

molds

5 and 6 are brought into contact with each other. In accordance with this forward movement, the first and

second slides

7 and 8 are moved forward so that the state shown in FIG. 6 is changed to the state shown in FIGS. 7 and 8 (the first slide 7 is moved forward). And the second slide 8 is moved backward), and the rear end surface of the extension wall 33 of the box rod recess 31x of the fixed mold 5 is set to the front end surface of the box rod recess 31x of the first slide 7. The rear end surface of the second side surface forming portion 83 of the second slide 8 is butted against the front end surface of the first side surface forming portion 73 of the first slide 7. As a result, the cavity 11, the gate 12, and the runner 13 are formed, and these are in communication with each other so that the molten resin passes. At this time, the anti-tape groove side convex portion 42y in the first slide 7 and the groove side partial convex portion 42z in the second slide 8 are in a state of surface contact with each other in the right and left directions, thereby forming a pin hole convex portion 42x. .
The forward movement of the first and

second slides

7 and 8 is, for example, an angular pin protruding from one of the fixed mold 5 and the movable mold 6 toward the other mold and a guide hole for guiding the angular pin. This is done by utilizing a structure with a guide hole formed on the other side or by driving a dedicated motor. When the first and

second slides

7 and 8 are reciprocated by a dedicated motor, it is not always necessary to drive the dedicated motor at the same time as the mold clamping process, even before or after the mold clamping process. good.
(3) Next, as shown in FIG. 9C, an injection process for injecting the molten resin is performed. The molten resin is injected into the cavity 11 through the runner 13 and the gate 12. Then, the molten resin enters the bonding wall space 36s (closed space) from the gate 12, and immediately after that, collides with the first slide 7 (more specifically, the slide hole convex portion 43x of the first slide main body 72). To do. It is assumed that the molten resin that has collided is forcibly changed in its course and proceeds so as to form the first and

second body walls

34 and 35. Then, as shown in FIG. 9D, the cavity 11 is filled with the molten resin. In addition, the collision surface of the slide hole convex portion 43x is a surface orthogonal to the left-right direction in the illustrated example.
(4) When a predetermined time elapses after the injection, the resin is cooled to such an extent that its shape can be sufficiently maintained. Next, a mold opening process is performed as shown in FIG. Specifically, the movable mold 6 is moved backward. When the angular pin is used, the first and

second slides

7 and 8 are moved back simultaneously with the return of the movable mold 6, or when the angular pin is not used, a dedicated motor is driven to drive the first. And the

second slides

7 and 8 are moved back or forth at the same time or before or after the moving back of the movable mold 6.
(5) After that, as shown in FIGS. 9 (f) and 9 (g), the runner resin portion 13r filled in the runner 13 and the gate resin portion 12r filled in the gate 12 are separated from the product box 3b. Then, the box 3b as a product is released from the fixed mold 5 by the ejecting pin and collected.

In the above-described injection molding method of this embodiment, a flow mark is hardly formed on the product box 3b. The first reason is that the distance traveled before the molten resin collides in the injection process is short. That is, since the molten resin collides with the slide hole convex portion 43 x immediately after being injected into the cavity 11, the distance moved during this time is shorter than the full width of the cavity 11. The second reason is that the molten resin moves symmetrically up and down toward the first and second body wall

concave portions

34 and 35 after colliding with the slide hole convex portion 43x. This is because the flow becomes symmetrical. When the flow is symmetrical, the pressure of the molten resin applied to the second tape 21b is also symmetric, and a situation in which the second tape 21b is deformed by this pressure can be avoided.

The present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the spirit of the present invention. For example, in this embodiment, the groove wall 37 protrudes from both the first and

second body walls

34 and 35. However, the present invention is not limited to this, and the first and second tape walls 41 are formed to form the tape groove 41. What is necessary is just to project the groove wall 37 from at least one to the other among the

trunk walls

34 and 35. Accordingly, the groove wall 37 may not protrude from the second body wall 35 even though the groove wall 37 protrudes from the first body wall 34.

Further, in the box 3b of the second embodiment, the side recess 36d is formed behind the groove wall 37 with respect to the entire range of the groove width range W behind the tape groove 41 in the joining wall 36, Not limited to this, at least a part of the groove width range W may be formed to be recessed from the groove wall 37. Therefore, the side recess 36d may be formed only for a part of the rear portion of the groove width range W. However, in order to improve the sense of unity by visual recognition of the tape groove 41 and the side recess 36d, it is desirable that the side recess 36d communicates with the rear of the tape groove 41.
In addition, in the box 3b of the second embodiment, the side recess 36d is formed in the entire range of the front and rear length of the joint wall 36. However, the side recess 36d is not limited to this and is formed only in the front end portion of the joint wall 36. The wall 36 may be formed on the front half of the front and rear length. In this case, the joint wall 36 has a box body at the rear side in the extension direction of the tape groove 41 and at the rear side in the extension direction of the side recess 36d. There are portions forming 32 side surfaces. In this case, it is desirable that a portion on the side of the tape groove 41 on the left and right side surfaces of the box body 32 along the side recess 36d and the portion along the tape groove 41 is a flat portion 38. Includes not only the portion of the joining wall 36 along the top and bottom of the side recess 36d but also the rearward portion of the side recess 36d in the extending direction.

In addition, the slide fastener to which the box of each embodiment of the present invention is applied has been described as an example in which an element row is formed by a large number of elements 22, but not limited to this, a resin monofilament is bent into a coil shape. An example in which element rows are formed by formed element rows, so-called coil elements may be used.

DESCRIPTION OF SYMBOLS 1 Slide fastener

2a Fastener stringer

2b Fastener stringer 21a 1st tape 21b 2nd tape 21x Tape mounting recessed part 21y Tape mounting half recessed part 21z Positioning part 22 Element 3 Opening tool 3a Butterfly stick 3b Box 31 Box stick 31a Box stick main body

31b Locking portion

31c Locking groove 31x Box rod recess 31y Box rod half recess 31z Wall 32 Box 32x Box recess 32y Box half recess 33 Extension wall 33x Extension wall recess 33y Extension wall half recess 34 First body wall 34x first body wall recess 35 second body wall 35x second body wall recess 36 joint wall 36a groove closing part 36b hole closing part

36c gate mark

36d side recess 36s joint wall space part (closed space part)
36v side convex part 36x joint wall concave part 37 groove wall 37x groove wall concave part 38 planar part 41 tape groove W groove width range 41x tape groove convex part 42 butterfly pin hole 42x butterfly stick hole convex part 42y anti tape groove side partial convex part 42z Groove side partial protrusion 43 Slide hole 43x Slide hole convex part 5 Fixed mold 6 Movable mold 7 First slide 7y First reciprocating concave part 71 First base part 72 First slide body part 73 First side face Forming part 8 Second slide 8y Second reciprocating recess 81 Second base part 82 Second slide body part 83 Second side surface forming part 11 Cavity 12 Gate 12r Gate resin part

12x Inlet recess

12y Exit recess 12z plane 13 Runner 13y runner half recess 13r runner resin part

91 First tape
91a tape groove 92 second tape 93 butterfly bar 93a butterfly bar hole 94 box 95 box 95a gate mark 96 box bar

Claims

A box bar (31) arranged in parallel to the front part of the butterfly stick (3a), and a box (32) including a butterfly hole (42) into which the rear part of the butterfly stick (3a) is inserted. In the box of the resin-made slide fastener opening device, the tape groove (41) communicating with the butterfly pin hole (42) is formed on one of the left and right side surfaces of the box (32).
An opening box for a slide fastener having a gate mark (36c) on the rear side in the extending direction of the tape groove (41) of the box (32).
The box (32) includes a side recess (36d) as a recess communicating with the tape groove (41) on the rear side in the extension direction of the tape groove (41), and a peripheral portion of the side recess (36d). And a flat portion (38) in a portion along the tape groove (41),
The box for a slide fastener according to claim 1, wherein the gate mark (36c) is provided on a bottom surface of the side recess (36d).
A slide hole (43) for inserting the first slide (7) for resin molding from the rear is formed on the rear surface of the box (32) in a state communicating with the rear of the butterfly pin hole (42). The box of the slide fastener opening device according to claim 1 or 2, wherein the slide fastener opening device box is provided.
The box for a slide fastener according to claim 1, 2 or 3, wherein the box bar (31) and the box (32) are vertically symmetrical.
In the method for manufacturing a box for a slide fastener opening device according to any one of claims 1 to 4,
A fixed mold (5), a movable mold (6) provided to be reciprocable in the vertical direction with respect to the fixed mold (5), and a reciprocating movement in the front-rear direction with respect to the fixed mold (5) With the first and second slides (7, 8) provided as possible,
In the mold clamping step, the first slide (7) moves forward and the second slide (8) moves backward, so that the gate is connected to the cavity (11) from which the molten resin is injected. (12) is formed at a position behind the tape groove (41) in the extending direction,
In the injection step after the mold clamping step, the molten resin is injected from the gate (12), and the molten resin is allowed to collide with the first slide (7). Manufacturing method.