TW201521624A - Retainer for slide fastener opener and retainer manufacturing method - Google Patents

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 barrel of zipper opening and closing member, and manufacturing method of tailing cylinder

The present invention relates to a method for manufacturing a tailing cylinder of an opening and closing member for a zipper, that is, a resin-opening cylinder, and a tailing cylinder.

As shown in Fig. 10, the opening and closing member for the zipper is fixed to the first and second chain members 91 and 92 which are parallel to the front and rear, and is fixed to the width direction (left and right direction) of the first chain cloth 91. The latch 93 on the side of the second chain cloth 92 and the tail cylinder 94 fixed to the side of the first chain cloth 91 in the width direction of the second chain cloth 92. The tail cylinder 94 includes an open tubular body 95 and a tubular pin 96 projecting from the second chain side of the front surface of the open tubular body 95. Further, the open tubular body 95 has a pin hole 93a into which the rear portion of the plug pin 93 is inserted on the first chain side of the front surface, and a first chain cloth 91 is inserted on the side of the left and right side surfaces on the side of the first chain cloth 91. Chain groove 91a. In the illustrated example, the chain groove 91a is formed in the middle of the thickness of the open tubular body 95 (the dimension of the thickness direction of the chain fabric = the dimension of the vertical direction).

Further, as one method of molding the open end cylinder having such a configuration, there is a resin injection molding. In the injection molding, the molten resin is ejected from the gate to the cavity, so that a gate mark (a trace of the gate) is formed in the tail pipe. More specifically, when the injection molding is performed, the resin is cured in the cavity to form an open end cylinder, and the resin is cured in the gate to form a gate resin portion, and the gate resin portion and the tail cylinder are formed continuously. When the gate resin portion is separated from the open end cylinder, a gate mark is formed in the open end cylinder. Therefore, in mold design, it is important to set the position of the gate relative to the cavity. Further, the position of the previous gate mark is formed on the upper side or the lower side of the chain groove (Patent Documents 1 and 2). In Fig. 10, a gate mark 95a is shown. The position is higher than the chain groove 91a.

Prior technical literature Patent literature

Patent Document 1: Chinese Patent Application Publication No. 102120354, FIG. 5

Patent Document 2: Chinese Patent Application Publication No. 1292241, specification 6

Moreover, in the above-mentioned previous open end cylinder, the chain groove also has a space communicating with the pin hole and is a dark space. On the other hand, since the space of the chain groove is dark, the portion along the chain groove (the upper surface and the lower surface with respect to the chain groove) in the left and right side faces of the open tubular body is relatively bright and easy. Look at the face. In this way, in the previous open end cylinder, the gate mark is attached to the bright and easy-to-see surface, and as a result, the gate mark becomes noticeable.

Further, in the previous open end cylinder, there is a case where a flow mark indicating a trace of the molten resin flows is formed on the surface of the open tubular body. Incidentally, if the previous opening cylinder is judged from the position of the gate mark, a gate is formed on the upper side or the lower side (specifically, the upper side in the following description) at the time of injection molding. In this case, the molten resin that has been ejected from the gate to the cavity passes through a space corresponding to the upper side of the opening cylinder, and changes the traveling direction after hitting the surface opposite to the chain groove. That is, the molten resin that is ejected from the gate to the cavity is changed in the orientation after the lateral width of the advance opening and closing cylinder. In order to suppress the generation of flow marks, it is preferable to shorten the distance from the molten resin to the direction in which the molten resin is changed as much as possible.

The present invention has been made in consideration of the above-described actual circumstances, and an object thereof is to provide a method for manufacturing an open tail cylinder and an open tail cylinder in which at least a gate mark is less noticeable.

The slide fastener of the present invention is made of an open-end cylinder resin, and includes: a cylindrical pin which is arranged in parallel with respect to a front portion of the plug; and an open tubular body including a pin hole through which a rear portion of the plug is inserted. Moreover, the chain groove of the open tail cylinder and the bolt hole is formed on the left and right of the open cylinder One side of the side. Further, a gate mark is formed after the groove width of the chain groove of the tail cylinder.

The side surface on the side of the chain groove of the open tubular body may be flat or have irregularities, but in order to make the gate mark less noticeable, it is preferably as follows.

That is, the open tubular body has a side concave portion as a concave portion communicating with the chain groove in the extending direction of the chain groove, and has a planar portion at a peripheral portion of the side concave portion and a portion along the chain groove, on the side The bottom surface of the recess has a gate mark.

The surface after the opening of the tubular body may be in a form of being completely covered, but it is preferable to suppress the occurrence of flow marks which are easily exposed on the outer surface of the open tubular body.

That is, on the rear surface of the opening cylinder, a slider hole for inserting the first slider for resin molding from the rear is formed in a state of being communicated with the rear of the pin hole.

Further, the tubular pin and the open tubular body may have an upper and lower asymmetrical shape. However, in order to make the gate mark difficult to attract attention and to easily suppress the generation of flow marks, it is preferable to be as follows.

That is, the pin and the open cylinder are vertically symmetrical.

The method for manufacturing the opening and closing cylinder of the opening and closing member for a zipper of the above-described open tail cylinder of the present invention is a movable mold which is provided with a fixed mold, which is reciprocally movable in the up and down direction with respect to the fixed mold, and is movable forward and backward with respect to the fixed mold The first and second sliders are provided in a direction to move back and forth. Further, in the mold clamping step, the first slider moves forward and the second slider moves backward, and the gate connected to the mold hole from which the molten resin is injected is formed in the extending direction of the chain groove. position. Further, in the injection step after the mold clamping step, the molten resin is ejected from the gate to cause the molten resin to collide with the first slider.

According to the opening and closing barrel of the opening and closing member for a zipper according to the present invention, there is a gate mark formed on the side of the chain groove on the left and right sides of the open tubular body at the rear of the chain groove of the darker space, so that the pouring is performed Mouth marks are not easy to attract attention.

Moreover, if the tail cylinder is connected to the chain groove in the extending direction of the chain groove The side surface concave portion of the concave portion has a planar portion at a peripheral portion of the side surface concave portion and a portion along the chain groove, and the chain groove and the side concave portion of the dark space are continuous to each other, and the side concave portion is formed on the side concave portion. The bottom surface has a gate mark, so the gate mark is not easy to attract attention.

Further, if the sliding member hole for inserting the first sliding member for resin molding from the rear is formed in a state of being connected to the rear of the pin hole at the rear surface of the tail cylinder, the position of the gate mark can be determined. In general, the molten resin which is ejected from the position of the gate mark in order to form the tailing cylinder collides with the first slider which forms the shape of the slider hole, and changes the traveling direction after the collision to correspond to the shape of the opening cylinder. The mold cavity moves, so that the distance from the molten resin to the initial collision is shorter than that of the previous product, and the flow of the tail cylinder is less likely to form.

Further, when the tubular pin and the open tubular body are vertically symmetrical, the flow of the molten resin after collision with the first sliding member is vertically symmetrical, so that it is difficult to form a flow mark in the open tubular body.

1‧‧‧ zipper

2a‧‧‧Zipper chain

2b‧‧‧zip chain strap

3‧‧‧Opening and closing parts

3a‧‧‧Latch

3b‧‧‧Opening cylinder

5‧‧‧Fixed mould

6‧‧‧ movable mold

7‧‧‧1st slider

7y‧‧‧1st round recess

8‧‧‧2nd slider

8y‧‧‧2nd round recess

11‧‧‧ cavity

12‧‧‧Gate

12r‧‧‧Gating resin department

12x‧‧‧ entrance recess

12y‧‧‧Exit recess

12z‧‧ plane

13‧‧‧ flow path

13r‧‧‧Flower Resin Department

13y‧‧‧Flower semi-recessed

21a‧‧‧1st chain cloth

21b‧‧‧2nd chain cloth

21x‧‧‧Chain placement recess

21y‧‧‧Chain placed semi-recessed

21z‧‧‧ Positioning Department

22‧‧‧ sprocket

31‧‧‧ pins

31a‧‧‧The body of the pin body

31b‧‧‧Clocks

31c‧‧‧ card slot

31x‧‧‧The pin recess

31y‧‧‧Cut pin half recess

31z‧‧‧ wall

32‧‧‧Opening cylinder

32x‧‧‧opening cylinder recess

32y‧‧‧Opening cylinder half recess

33‧‧‧Extension wall

33x‧‧‧Extension wall recess

33y‧‧‧Extension wall semi-recessed

34‧‧‧1st body wall

34x‧‧‧1st body wall recess

35‧‧‧2nd body wall

35x‧‧‧2nd body wall recess

36‧‧‧ joint wall

36a‧‧‧Slot closure

36b‧‧‧ hole closure

36c‧‧‧ slogging

36d‧‧‧Side recess

36s‧‧‧ Space for joint wall (closed space)

36v‧‧‧Side convex

36x‧‧‧ joint wall recess

37‧‧‧ slot wall

37x‧‧‧ trough wall recess

38‧‧‧ Planar Department

41‧‧‧Chain groove

41x‧‧‧Chain groove convex

42‧‧‧ pin hole

42x‧‧‧ Pin hole convex

42y‧‧‧Anti-chain groove side part convex

42z‧‧‧Slot side convex part

43‧‧‧Slider hole

43x‧‧‧Slider hole convex

71‧‧‧1st base section

72‧‧‧1st slider body

73‧‧‧1st side forming department

81‧‧‧2nd base section

82‧‧‧2nd slider body

83‧‧‧2nd side forming department

91‧‧‧1st chain cloth

91a‧‧‧Chain groove

92‧‧‧2nd chain cloth

93‧‧‧Tram

93a‧‧‧ Pin hole

94‧‧‧Opening cylinder

95‧‧‧Opening cylinder

95a‧‧‧ slogging

96‧‧‧ pins

W‧‧‧ slot width range

Fig. 1 is a perspective view showing a slide fastener including a tail cylinder of the first embodiment of the present invention.

Fig. 2(a) is a plan view showing a state in which the zipper of the open end cylinder according to the first embodiment of the present invention is closed, and Fig. 2(b) is a plan view showing a part of (a) of the drawing.

Fig. 3 is a plan view showing a state in which a zipper of the open end cylinder according to the first embodiment of the present invention is opened, and a part of the zipper is a cross-sectional view.

4(a) to 4(d) are a plan view, a right side view, a front view, and a cross-sectional view taken along line A-A of the open end cylinder according to the first embodiment of the present invention.

Fig. 5 is a perspective view showing the tail cylinder of the second embodiment of the present invention.

Fig. 6 is a perspective view showing a molding die used in the opening cylinder of the second embodiment of the present invention.

7(a) and 7(b) are a side view and a plan view, respectively, showing the first and second sliders in a mold opening state, and (c) a front view of the first slider.

8(a) and 8(b) are a side view and a plan view, respectively, showing the first and second sliders in a mold clamping state.

Fig. 9 (a) to (g) are diagrams showing the sequence of the injection molding method.

Figure 10 is a perspective view showing a zipper including an example of a prior open tail cylinder.

The zipper 1 includes two zipper tapes 2a and 2b and a slider (not shown) as a basic configuration. The two zipper tapes 2a and 2b have a front-rear direction as a length direction as shown in FIGS. 1 to 3. Further, the left and right direction is defined as the width direction, and the slider is slid along the two fastener chain belts 2a and 2b which are disposed to face each other. In this example, the direction in which the two fastener tapes 2a and 2b are closed in the front and rear directions in the sliding direction is set as the front direction, and the direction in which the two fastener tapes 2a and 2b are opened is set as the rear direction. In the following description, the front direction in the front-rear direction is the lower direction of FIG. 2, and the rear direction is the upper direction of FIG. The left direction in the left-right direction is the left direction of FIG. 2, and the right direction is the right direction of FIG. In addition, the upper direction in the up-down direction which is orthogonal to the front-back direction and the left-right direction is a front direction with respect to the paper surface of FIG. 2, and the downward direction is the direction of the back side with respect to the paper surface of FIG.

Each of the fastener tapes 2a and 2b includes chain cloths 21a and 21b which are elongated strips (elongated rectangular shape) and have a front-rear direction as a longitudinal direction and a left-right direction as a width direction; and a plurality of fastener elements 22, which is fixed at intervals along one end of the width direction of the chain cloths 21a, 21b; a plurality of fastener elements 22 form a row of chain rows. Each of the fastener elements 22 is made of, for example, a resin. Further, the two fastener chain belts 2a and 2b include one opening and closing member 3 in addition to the two opposite chain fabrics 21a and 21b and the two opposing chain rows (the plurality of fastener elements 22).

The opening and closing member 3 is fixed to the rear end of the two chain cloths 21a, 21b, and more specifically, It is fixed at intervals behind the chain teeth of both sides. Further, the opening and closing member 3 includes a latch 3a fixed to one of the two chain fabrics 21a and 21b, and an open tail cylinder 3b fixed to the other. Hereinafter, the chain cloth 21a on the side to which the plug 3a is fixed is referred to as a first chain cloth, and the chain cloth 21b on the side to which the tail cylinder 3b is fixed is referred to as a second chain cloth.

The pin 3a is a rod elongated in the front-rear direction. In the front-rear direction, the latch 3a is fixed to the rear end portion of the first chain cloth 21a, and more specifically, fixed to the rear side with respect to the element tooth row. Further, in the left-right direction, the plug 3a is fixed to the end portion on the second link 21b side in the width direction of the first link 21a. Further, the plug 3a is fixed so as to be parallel to the thickness direction of the first link 21a in the middle portion of the total height (upper and lower width) of the first link 21a. In other words, the end portion on the second link 21b side in the width direction of the first chain cloth 21a is embedded in the plug 3a.

As shown in FIG. 1 to FIG. 4, the tail cylinder 3b according to the first embodiment of the present invention includes a cylinder pin 31 which is oriented in one of the left and right directions with respect to the front portion of the bolt 3a which is extended forward and backward (the second chain cloth 21b) The sides are arranged in parallel; and the tail cylinder 32 has a pin hole 42 into which the rear portion of the pin 3a is inserted. Further, a portion of the front surface of the open tubular body 32 and the direction in the left-right direction opposite to the one direction (the side of the first chain cloth 21a) forms a pin hole 42 in the same manner as the front surface of the tail cylinder 32 and In the portion on the second link 21b side in the left-right direction, the tubular pin 31 is joined in a state of protruding forward.

In the front-rear direction, the open end cylinder 3b is fixed to the rear end portion of the second chain cloth 21b, and more specifically, is fixed to the rear side with respect to the element tooth row. Further, in the left-right direction, the open end cylinder 3b is fixed to the end portion on the first link 21a side in the width direction of the second chain cloth 21b. Further, in the up-and-down direction, the open end cylinder 3b (the pin 31 and the open tubular body 32) is fixed so as to sandwich the second link 21b at the intermediate portion of the total height. In other words, the end portion on the second link 21b side in the width direction of the second chain cloth 21b is embedded in the tubular pin 31 and the open tubular body 32.

The pin 31 includes: a pin body portion 31a that extends forward and backward; and a locking portion 31b, The front end portion of the surface on the side of the first chain cloth 21a of the plug 3a from the left and right side surfaces of the pin main body portion 31a protrudes laterally toward the front side of the pin hole 42. The locking portion 31b is formed at an intermediate portion of the total height and width of the tubular pin 31. Further, a locking groove portion 31c for accommodating the locking portion 31b is recessed in the front end portion of the surface on the side of the second chain cloth 21b for the cylindrical pin 31 in the left and right side surfaces of the latch 3a.

The open tubular body 32 is a hexahedron having upper and lower sides, front and rear faces. Further, in the illustrated example, each surface is formed in a planar shape. The planar shape includes not only a flat surface but also a surface that is curved in an arc shape (a surface that is bulged in an arc shape and a surface that is recessed in an arc shape). For example, in the illustrated example, the upper surface and the lower surface are surfaces that are bulged in a curved surface that is curved in an arc shape (more specifically, for example, the upper surface is gradually increased from the both ends of the total width toward the middle) The way to bulge)). Further, the open tubular body 32 has a chain groove 41 into which the first chain cloth 21a is inserted on the side surface on the side of the first chain cloth 21a on the left and right side surfaces. The chain groove 41 is a groove that is extended in the front-rear direction and closed at the front opening. The pin hole 42 is in communication with the chain groove 41 on the side of the second chain cloth 21b with respect to the chain groove 41, and the pin hole 42 is opened in the front. On the other hand, the side of the first chain cloth 21a behind the pin hole 42 is closed, and the side of the second chain cloth 21b is penetrated.

The open tubular body 32 includes an extension wall 33 that extends from the rear end to the rear of the tubular pin 31, and the first and second main body walls 34 and 35 that are first and second in the left-right direction from the upper and lower ends of the extension wall 33. The side of the chain cloth 21a protrudes in parallel; the joint wall 36 joins the end portions of the first and second main body walls 34, 35 on the side of the first link 21a in the longitudinal direction of the front and rear directions; and the groove The end portions of the first and second main body walls 34 and 35 on the side of the first link 21a are narrowed at intervals between the first and second main body walls 34 and 35, and the walls 37 and 37 are narrowed. The way is outstanding. Further, a space formed between the upper and lower groove walls 37, 37 serves as a chain groove 41. Incidentally, each of the groove walls 37 of the illustrated example is formed over the entire length of the first and second body walls 34 and 35 in the front-rear direction and the front side of the joint wall 36. Therefore, the joint wall 36 is continuous with the upper and lower groove walls 37. also, Since the tail cylinder 3b of the present embodiment has a vertically symmetrical shape, the chain groove 41 is disposed at the intermediate portion of the total height and width of the tail cylinder 3b.

The extension wall 33 has a bar shape with a rectangular cross section. Further, in the illustrated example, the left and right widths of the extension wall 33 are formed to be wider than the tubular pin 31, and the surface on the side of the first chain cloth 21a (the surface on the side of the pin hole 42) of the left and right side surfaces of the extension wall 33 is formed with the pin. The surface corresponding to 31 is formed substantially in the same plane shape, and the surface on the side of the second chain cloth 21b of the left and right side surfaces of the extension wall 33 protrudes laterally from the tubular pin 31. The upper and lower widths of the extension wall 33 are the same as the upper and lower widths of the tubular pin 31. Further, the first and second body walls 34 and 35 projecting laterally from the upper and lower ends of the extension wall 33 have a plate shape.

The joint wall 36 includes a groove closing portion 36a that closes the rear side of the chain groove 41, and a hole closing portion 36b that closes the side of the first chain cloth 21a behind the pin hole 42. Therefore, the space surrounded by the joint wall 36 (hole closing portion 36b), the extension wall 33, the first body wall 34, and the second body wall 35 serves as a first slider for resin molding (not shown in FIG. 1). The slider hole 43 is inserted, and the slider hole 43 is in communication with the pin hole 42. The side surface of the joint wall 36 is the side on the side of the chain groove 41 on the right and left side surfaces of the tail cylinder 32, and the rear side in the extending direction of the chain groove 41 and the rear side in the extending direction of the upper and lower groove walls 37 are formed. A gate mark 36c is formed on the side of the wall 36.

The gate mark 36c is formed on the surface of the joining wall 36 (the groove closing portion 36a) on the side of the first chain cloth 21a, and the rear side in the extending direction of the chain groove 41, in other words, the groove width of the chain groove 41 is in the range of W. Further, in the front-rear direction, the gate mark 36c is formed at the front end portion of the joint wall 36. In other words, the gate mark 36c is formed on the side of the left and right side faces of the open tubular body 32 on the side of the chain groove 41, and forms the front end portion of the side surface of the chain groove 41 in the extending direction. More specifically, the front end of the gate mark 36c becomes the same as the front end of the joint wall 36. Further, in the vertical direction, the center of the gate mark 36c coincides with the midpoint of the groove width range W. Incidentally, in the illustrated example, the gate mark 36c is a circular area which is flush with the surface of the joint wall 36 on the side of the first link 21a side, but is not limited thereto, and is formed according to the shape. The process becomes a recess or a smaller protrusion.

The gate mark 36c of the open end cylinder 3b of the first embodiment of the present invention described above is not noticeable. The first reason is that the gate mark 36c is provided behind the extending direction of the chain groove 41 of the dark space portion. Further, the second cause is that the center of the gate mark 36c coincides with the midpoint of the groove width range W, and the chain groove 41 and the gate mark 36c have a uniform feeling. Further, the third reason is that the front end of the gate mark 36c coincides with the front end of the joint wall 36, and the chain groove 41 and the gate mark 36c have a uniform feeling.

As shown in Fig. 5, the tail cylinder 3b according to the second embodiment of the present invention is different from the tail cylinder 3b of the first embodiment in that the first chain of the latch 3a is used in the right and left side faces of the tail cylinder 32. The side of the 21a side is rearward of the chain groove 41 in the extending direction, and has a side recess 36d which is recessed (in more detail, steppedly recessed) from each of the groove walls 37, and is located along each of the groove walls 37 (along The portion of the chain groove 41 and the peripheral portion of the side recess 36d (the portion above the side recess 36d in the drawing) have a planar portion 38.

In the up-and-down direction, the side concave portion 36d is formed over the entire range of the groove width range W of the chain groove 41. In the front-rear direction, the side recess 36d is formed over the entire length of the front and rear of the joint wall 36. Therefore, the side recess 36d is opened in the front, and the side recess 36d communicates with the chain groove 41. Further, a gate mark 36c is formed on the bottom surface of the side surface recessed portion 36d (i.e., the surface on the side of the first chain cloth 21a). Further, the front end of the gate mark 36c is aligned with the front end of the side recess 36d. Further, in the up-and-down direction, the center of the gate mark 36c coincides with the intermediate point of the total height and width of the side surface recessed portion 36d, and the side surface recessed portion 36d has the same upper and lower width as the groove width range W.

The planar portion 38 is a flat portion, and is a planar shape. As described above, it includes not only a flat surface but also a curved surface that is curved in an arc shape (a surface that is bulged in an arc shape and recessed in an arc shape) The face).

The open end cylinder 3b according to the second embodiment of the present invention is formed such that the side concave portion 36d communicates with the chain groove 41, so that one of the chain groove 41 and the side concave portion 36d is formed. The body feel, while the side recess 36d looks like a part of the chain groove 41. Further, since the side surface concave portion 36d is formed corresponding to the entire range of the groove width range W of the chain groove 41 in the vertical direction, the sense of the one of the chain groove 41 and the side surface concave portion 36d is further improved. Moreover, since the planar portion 38 is provided above and below the chain groove 41 and the side concave portion 36d, it is in the form of three lines. Therefore, the gate mark 36c formed on the side concave portion 36d becomes less noticeable.

In the above-described manufacturing method of the open end cylinder 3b according to the first and second embodiments of the present invention, injection molding using a resin as a raw material is used. Hereinafter, a method of manufacturing the tail cylinder 3b of the second embodiment will be described. As shown in FIG. 6, the injection molding die used in the manufacturing method includes: a fixed mold 5; a movable mold 6 which is supported to be reciprocally movable in the up and down direction with respect to the fixed mold 5; and first and second sliders 7 8, 8, etc. can reciprocate in the front-rear direction with respect to the fixed mold 5.

The injection molding die is formed in a mold-locking state: a cavity 11 which is a space portion corresponding to the shape of the tail cylinder 3b, a gate resin portion 12r which is connected to the gate mark 36c, and which communicates with the cavity 11 The gate 12 of the passage and the flow passage 13 as a passage communicating with the gate 12.

The cavity 11 includes: a cylindrical pin recess 31x which forms an outer shape of the tubular pin 31; an open tubular recess 32x which forms an outer surface (so-called six faces) of the outer tubular body 32; and a convex portion The inner surface of the outer shape of the open tubular body 32 is formed.

The open tubular recess 32x includes: an extended wall recess 33x that forms an outer surface of the extended wall 33 (a surface on the second chain cloth 21b side of the left and right side surfaces of the open tubular body 32 and a portion of the front surface of the open tubular body 32 and a portion of the rear surface of the tail cylinder 32; the first and second body wall recesses 34x, 35x, which respectively form the outer surfaces of the first and second body walls 34, 35; and the joint wall recess 36x, which form the joint wall 36 outer surface (one portion of the rear surface of the tubular body 32 and a portion of the side surface); and a groove wall recess 37x which forms the outer surface of the groove wall 37 (a portion of the side surface of the open tubular body 32). Furthermore, in FIG. 6, the first one is not shown. Main body wall recess 34x.

The convex portion includes: a chain groove convex portion 41x which forms a chain groove 41; a pin hole convex portion 42x (refer to FIG. 8) which forms a pin hole 42; and a slider hole convex portion 43x which forms a slider hole 43.

In the present embodiment, the fixed mold 5 and the movable mold 6 are formed in a vertically symmetrical shape so as to be formed at an intermediate position between the total height and the width of the split mold line 3b which is the open end cylinder 3b of the product. Further, on the surface of the fixed mold 5 (the surface abutting the movable mold 6), the cylindrical pin semi-recessed portion 31y which is the lower half of the cylindrical pin recess 31x, and the open-end cylinder which is the lower half of the open-ended cylindrical recess 32x The second main body wall recess 35x in the semi-recessed portion 32y, the extended-wall semi-recessed portion 33y as the lower half of the extended-wall recessed portion 33x, and the flow-path semi-recessed portion 13y as the lower half of the flow passage 13 are formed in a recessed state.

Moreover, the chain cloth mounting semi-recessed portion 21y is placed on the surface of the fixed mold 5 as a lower half of the chain cloth mounting recess 21x on which the second chain cloth 21b is placed, and the cylindrical pin semi-recessed portion 31y and the extended-wall semi-recessed portion The lateral side of 33y (opposite to the flow path semi-recessed portion 13y) and the state in which the front and rear are connected and recessed are formed. The depth at which the chain cloth is placed in the semi-recessed portion 21y is set to be one-half the thickness of the second chain cloth 21b. Further, the end portions of the left and right end portions of the second chain cloth 21b on the side where the fastener elements 22 are fixed are formed to be thicker than the other portions in the thickness direction of the chain cloth. In order to position the thick portion, a portion (positioning portion) 21z of the chain-mounted semi-recess 21y is formed deeper.

Further, on the surface of the fixed mold 5, the first and second reciprocating recesses 7y and 8y for moving the lower half of the first and second sliders 7 and 8 that reciprocate are connected back and forth, and also to the tail cylinder. The semi-recessed portion 32y is formed to communicate with each other. More specifically, the first and second reciprocating recesses 7y and 8y are formed to communicate with each other in the left-right direction of the open tubular body semi-recessed portion 32y on the side opposite to the chain-distributing semi-recessed portion 21y.

The first round-recessed recessed portion 7y and the extended-wall semi-recessed portion 33y communicate with each other on the side opposite to the chain-following semi-recessed portion 21y, and are formed to communicate with the second main-wall recessed portion 35x at the rear.

The second reciprocating recess 8y is placed on the chain semi-recessed portion with respect to the collet semi-recessed portion 31y. 21y is formed by the opposite side opening interval. More specifically, the second round-back recessed portion 8y is formed on the side opposite to the chain-side semi-recessed portion 21y on the left and right walls constituting the cylindrical pin semi-recessed portion 31y. Further, the second retracting recessed portion 8y and the second main body wall recessed portion 35x of the open-end tubular semi-recessed portion 32y are formed to communicate with each other in front and side (opposite to the extended-wall semi-recessed portion 33y).

Further, since the movable mold 6 is symmetrical with the fixed mold 5, the first main body wall recess 34x, the upper half of the extension wall recess 33x, and the pin are formed on the surface of the movable mold 6 (the surface abutting the fixed mold 5). The upper half of the recess 31x, the upper half of the chain placement recess 21x, and the upper half of the flow path 13.

The first slider 7 includes a first base portion 71 that forms the rear surface side of the open tubular body 32 and is mainly an engagement wall 36 (more specifically, the end portion of the rear surface side of the extension wall 33 on the side of the pin hole 42 side) And the rear surface of the joint wall 36); the first slider main body portion 72 protrudes forward from the side of the front surface of the first base portion 71 in the left-right direction of the chain mounting semi-recessed portion 21y; and the first side surface forming portion 73, This forms the side surface of the open tubular body 32 and the side surface of the joint wall 36 (the side surface on the side of the chain groove 41), and protrudes forward from the first base portion 71. Further, on the surface of the first side surface forming portion 73 on the side of the first slider main body portion 72, the side surface convex portion of the side surface concave portion 36d of the joint wall 36 is formed at the intermediate portion of the total height and width over the entire length of the front and rear lengths. 36v stands out and forms.

The first slider main body portion 72 is a rod shape that extends forward and backward (more specifically, a rod shape having a rectangular cross section), and includes a slider hole convex portion 43x that protrudes forward from the first base portion 71; The anti-chain groove side partial convex portion 42y forms a portion of the pin hole convex portion 42x opposite to the chain groove 41, and protrudes forward from the slider hole convex portion 43x. Incidentally, the front end surface of the anti-chain groove side partial convex portion 42y abuts against the wall 31z, and the wall 31z constitutes the opposite side of the chain-mounted semi-recessed portion 21y in the left and right walls of the cylindrical pin semi-recessed portion 31y. wall.

The second slider 8 includes: a second base portion 81 that forms a front surface of the tail cylinder 32 The side and the extension wall 33 are on the side of the chain groove 41; the groove side partial projection 42z forms the side of the chain groove 41 in the right and left of the pin hole projection 42x; the chain groove convex portion 41x; and the second side surface is formed A portion 83 that forms a side of the groove wall 37 in the side of the open tubular body 32. The second slider main body portion 82 is formed by the groove side partial convex portion 42z and the chain groove convex portion 41x. Further, the groove side concave portion 31x side in the left-right direction faces the opposite side (the flow path 13 side), and the groove side portion convex portion 42z, the chain groove convex portion 41x, and the second side surface forming portion 83 are sequentially changed from the second base. The rear surface of the seat portion 81 protrudes rearward. The groove side partial convex portion 42z, the chain groove convex portion 41x, and the second side surface forming portion 83 are formed on the same plane in which the left and right directions are in a straight line.

The groove side partial convex portion 42z is in surface contact with the side surface of the reverse chain groove side partial convex portion 42y, thereby forming the pin hole convex portion 42x.

Further, the groove side convex portion 42z, the chain groove convex portion 41x, and the second side surface forming portion 83 form a space portion corresponding to the shape of the groove wall 37 above and below the chain groove convex portion 41x. Therefore, the chain groove convex portion 41x is formed to be different in height from the groove side portion convex portion 42z and the second side surface forming portion 83 in the vertical direction. In other words, the chain groove convex portion 41x is disposed at an intermediate portion of the total height and width of both the groove side partial convex portion 42z and the second side surface forming portion 83.

Further, as shown in Figs. 6 and 7, the gate 12 is formed on the surface abutting on the first and second side surface forming portions 73, 83. The gate 12 is elongated in the left-right direction, and the shape of the inlet portion and the outlet portion of the molten resin in the gate 12 are formed into different shapes (in the illustrated example, the shape of the inlet portion is formed into a circular shape so that the outlet portion is The shape is formed into a rectangle). Further, the inlet portion of the molten resin in the gate 12 is an inlet recess 12x in which the first and second side surface forming portions 73 and 83 respectively form a recess corresponding to one half of the shape of the inlet portion, and the melting in the gate 12 The outlet portion of the resin is an exit recess 12y in which the recess is formed only in the first side surface forming portion 73, and the second side surface forming portion 83 has a flat surface 12z that covers the outlet recess 12y (see FIGS. 7 and 8).

The movable mold 6 and the fixed mold are in a state in which the above-mentioned injection molding die has been clamped. The second slider 8 and the first slider 7 are in a state in which the first slider main body portion 72 of the first slider 7 is in a state of being moved forward and is in contact with the fixed mold 5, and is moved rearward. Docking. Further, the first and second sliders 7 and 8 are butted together, and the joint wall space portion 36s corresponding to the shape of the joint wall 36 is formed by the first slider 7 (the slider hole of the first slider body portion 72). The convex portion 43x, the first base portion 71, and the first side surface forming portion 73), and the second slider 8 (the groove side portion convex portion 42z of the pin hole convex portion 42x and the chain groove in the second slider 8) The convex portion 41x is formed after the end surface). Further, the joint wall space portion 36s is a space portion corresponding to the shape of the groove closing portion 36a and the hole closing portion 36b of the joint wall 36, and is in the mold cavity 11 and the side of the chain groove 41 in the pin hole 42. The closed space portion corresponding to the shape of the portion which is closed after the portion of the chain cloth groove 41 and the rear portion of the chain cloth groove 41.

An embodiment of a forming method using the above-described injection molding die 3b of the injection molding die will be described. (1) First, as shown in Fig. 9 (a), the injection molding die is in a mold opening state. Then, as shown in FIG. 9(b), the step of placing the second chain cloth 21b on the fixed mold 5 is performed. Specifically, one end portion of the second chain cloth 21b in the left-right direction is placed on the positioning portion 21z (see FIG. 6) of the chain mounting recess 21x of the fixed mold 5 and positioned. Thereby, one side of the width direction of the second chain cloth 21b is disposed on the side of the cavity 11, and the other side in the width direction is disposed on the side separated from the cavity 11. Incidentally, in this embodiment, as shown in FIG. 6, the first slider 7 is disposed so as to be retracted to the rear side of the second main body wall recess 35x (the moving state), and the second slider 8 is provided. It is arranged so as to be retracted to the front side (the moving state) of the second main body wall recess 35x.

(2) Then, as shown in Fig. 9(c), a mold clamping step is performed. Specifically, the movable mold 6 is moved in the direction of the fixed mold 5, and the two molds 5, 6 are butted. In addition, the first and second sliders 7 and 8 are moved downward (the first slider 7 is moved toward the state shown in FIG. 7 and FIG. 8) from the state shown in FIG. The frontward direction is moved to move the second slider 8 rearward, and the end surface of the extension wall 33 of the cylindrical pin recess 31x of the fixed mold 5 is butted against the front end surface of the cylindrical pin recess 31x of the first slider 7. The rear end surface of the second side surface forming portion 83 of the second slider 8 is butted against the front end surface of the first side surface forming portion 73 of the first slider 7. Thereby, the cavity 11, the gate 12, and the flow path 13 are formed, and the like is set to be in a state of allowing the molten resin to pass therethrough. In addition, at this time, the anti-chain groove side partial convex portion 42y of the first slider 7 and the groove-side partial convex portion 42z of the second slider 8 are in contact with each other in the left-right surface, and the pin hole convex portion 42x is formed. .

Further, the outward movement of the first and second sliders 7 and 8 is formed by using, for example, an oblique pin protruding from one of the fixed mold 5 and the movable mold 6 toward the other mold, and guiding the bevel pin. The construction of the guide hole of the other mold is performed by driving a dedicated motor. When the first and second sliders 7 and 8 are reciprocated by a dedicated motor, it is not always necessary to drive the dedicated motor in the same period as the mold clamping step, and it is also possible to drive before or after the mold clamping step.

(3) Next, as shown in Fig. 9(c), an injection step of ejecting the molten resin is performed. The molten resin is emitted to the cavity 11 via the flow path 13 and the gate 12. Then, the molten resin enters the joint wall space portion 36s (closed space portion) from the gate 12, and immediately with the first slider 7 (more specifically, the slider hole convex portion 43x of the first slider body portion 72) )collision. It is assumed that the collided molten resin is forcibly changed in the advancing direction, and travels so as to form the first and second main body walls 34 and 35. Then, as shown in FIG. 9(d), the molten resin is filled into the cavity 11. Further, in the illustrated example, the collision surface of the slider hole convex portion 43x is a surface orthogonal to the left-right direction.

(4) If a certain period of time elapses after the injection, the resin is cooled to such an extent that the shape can be sufficiently maintained, and then the mold opening step is carried out as shown in Fig. 9(e). Specifically, the movable mold 6 is moved in the direction. Further, when the bevel pin is used, the first and second sliders 7 and 8 move toward the movable mold 6 at the same time, or when a bevel pin is not used, the dedicated motor is driven. On the other hand, the first and second sliders 7 and 8 and the movable mold 6 are moved in the same direction or moved forward or backward.

(5) Thereafter, as shown in Figs. 9(f) and 9(g), the flow path tree filled in the flow path 13 is used. The grease portion 13r and the gate resin portion 12r filled in the gate 12 are separated from the open end cylinder 3b which is the product, and the ejector pin 3b which becomes the product is released from the fixed mold 5 by the ejector pin, and is recovered. .

The above-described injection molding method of the present embodiment does not easily form a flow mark in the open end cylinder 3b of the product. The first reason is that the distance from which the molten resin travels to the collision is short in the injection step. That is, the reason is that the molten resin immediately collides with the slider hole convex portion 43x immediately after being ejected to the cavity 11, and thus the distance moved therebetween is shorter than the total width of the cavity 11. The second reason is that after the collision with the slider hole convex portion 43x, the molten resin moves up and down symmetrically toward the first and second body wall recesses 34, 35, that is, the flow of the molten resin is symmetrical above and below the product. Further, the flow which is symmetrical upward and downward makes the pressure of the molten resin applied to the second chain cloth 21b symmetrical, and the situation in which the second chain cloth 21b is deformed by the pressure is avoided.

The present invention is not limited to the above-described embodiments, and can be appropriately modified without departing from the scope of the invention. For example, in the present embodiment, the groove wall 37 is protruded from both the first and second body walls 34 and 35. However, the present invention is not limited thereto, and the groove wall 37 is formed from the first to form the chain groove 41. At least one of the second body walls 34, 35 may protrude toward the other. Therefore, the groove wall 37 may protrude from the first main body wall 34, but the groove wall 37 may not protrude from the second main body wall 35.

Further, the side recessed portion 36d is formed in the open end cylinder 3b of the second embodiment in the extending direction of the chain groove 41 in the joint wall 36, and the entire range of the groove width range W is recessed from the groove wall 37, but is not formed. In this case, it may be formed such that at least a part of the groove width range W is recessed from the groove wall 37. Therefore, the side recessed portion 36d may be formed only in one portion of the rear portion of the groove width range W. However, in order to improve the sense of the sense of the chain groove 41 and the side recess 36d, it is preferable that the side recess 36d communicates with the rear of the chain groove 41.

Further, the side recessed portion 36d is formed in the open end cylinder 3b of the second embodiment. The entire range of the front and rear lengths of the wall 36 is not limited thereto, and may be formed only in the front end of the joint wall 36, or only formed in the joint wall 36 before the front half length, etc. In this case, in the joint wall 36, a portion forming the side surface of the open tubular body 32 is formed behind the extending direction of the chain groove 41 and the rear portion of the side concave portion 36d in the extending direction. Further, in this case, it is preferable that the left and right side faces of the open tubular body 32 are on the side of the chain groove 41 side, and the peripheral portion of the side surface concave portion 36d and the portion along the chain groove 41 are formed as the flat portion 38, The peripheral portion here includes not only the portion of the joint wall 36 that is above and below the side recess portion 36d but also the rear portion of the side recess portion 36d in the extending direction.

Further, the slide fastener of the open end cylinder to which the embodiment of the present invention is applied is described as an example in which the plurality of fastener elements 22 are formed as a fastener element row. However, the present invention is not limited thereto, and the resin may be formed. An example of a chain of teeth formed by bending a monofilament into a loop shape, and forming a fastener row by a so-called loop fastener element.

1‧‧‧ zipper

2a‧‧‧Zipper chain

2b‧‧‧zip chain strap

3‧‧‧Opening and closing parts

3a‧‧‧Latch

3b‧‧‧Opening cylinder

21a‧‧‧1st chain cloth

21b‧‧‧2nd chain cloth

22‧‧‧ sprocket

31‧‧‧ pins

31a‧‧‧The body of the pin body

31b‧‧‧Clocks

32‧‧‧Opening cylinder

36c‧‧‧ slogging

41‧‧‧Chain groove

42‧‧‧ pin hole

Claims (6)

An opening and closing cylinder for an opening and closing member for a zipper, which is made of a resin, and includes: a cylinder pin (31) which is arranged in parallel with respect to a front portion of the bolt (3a); and a tail cylinder (32) having a a latch hole (42) inserted in a rear portion of the latch (3a); a chain groove (41) communicating with the latch hole (42) formed on one side of one of left and right sides of the open tubular body (32); the zipper The opening and closing cylinder of the opening and closing member is characterized in that a gate mark (36c) is provided behind the extending direction of the chain cloth groove (41) of the open tail cylinder (32). The open end cylinder of the opening and closing member for a zipper of claim 1, wherein the open tubular body (32) has a recess in communication with the chain cloth groove (41) behind the extending direction of the chain cloth groove (41) a side recess (36d) having a planar portion (38) at a peripheral portion of the side recess (36d) and a portion along the chain groove (41), and having the above-mentioned bottom surface on the bottom surface of the side recess (36d) Mouth mark (36c). The opening end of the opening and closing member for the zipper of claim 1 or 2, wherein the sliding member for inserting the first sliding member (7) for resin molding from the rear is provided on the surface after the opening of the tubular body (32) The hole (43) is formed in a state of being in communication with the rear side of the above-mentioned pin hole (42). The opening end of the opening and closing member for a zipper of claim 1 or 2, wherein the above-mentioned cylindrical pin (31) and the above-mentioned open tubular body (32) are vertically symmetrical. The open end cylinder of the opening and closing member for a zipper of claim 3, wherein the above-mentioned cylindrical pin (31) and the above-mentioned open tubular body (32) are vertically symmetrical. A method for manufacturing a tail-opening cylinder for a zipper opening and closing member, which is a method for manufacturing a tail-opening cylinder for a zipper opening and closing member according to any one of claims 1 to 5, characterized in that a fixing die (5) is used. a movable mold (6) that is reciprocally movable in the vertical direction with respect to the fixed mold (5), and first and second sliders that are reciprocally movable in the front-rear direction with respect to the fixed mold (5) ( 7, 8), In the mold clamping step, the first slider (7) moves forward and the second slider (8) moves backward, and is connected to the gate (11) from which the molten resin is injected ( 12) formed at a position rearward in the extending direction of the chain groove (41), and in the step of ejecting after the mold clamping step, the molten resin is ejected from the gate (12) to cause the molten resin and the first slip Piece (7) collides.