JP3188360B2 - Tie fasteners and their molds - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a string stopper for fixing a string or ribbon for fastening a tent, a rucksack, a jacket, or the like at a desired fastening position, and a molding die therefor.

[0002]

2. Description of the Related Art This type of strapping device generally has a large number of components, and these components are combined to complete one strapping device. In addition, each part is manufactured in a separate process and is assembled as a cord stopper, which requires complicated assembly work as the number of processes increases.

[0003] In view of such circumstances, a synthetic resin strapping device which reduces the number of parts and does not require complicated assembling work has already been developed as disclosed in, for example, Japanese Utility Model Publication No. 5-40731. Have been. This strap stopper is formed integrally with an elastic plate inside the socket, and is formed in a wedge shape with the front and rear surfaces of a portion of the plug to be inserted into the socket being inclined, and when the plug is inserted into the socket, the elastic plate is formed. The upper end portion elastically contacts the inclined surface and urges the plug upward to fix and attach the string. As described above, the previously developed strap fastener has an advantageous structure as compared with a general strap fastener of this kind in that the number of parts is only two and no special assembling work is required. I have.

[0004]

However, the socket of the above-described strap fastener has a box shape having a string insertion opening in the front and rear wall surfaces and side walls on the left and right sides. Cannot be simultaneously formed by the same mold. Therefore, the socket and the plug are separately formed, and it is necessary to reassemble the two. This means that there are a plurality of molding steps and that, although simple, an assembling step is required, and that it is necessary to manage the number of sockets and plugs in stock.

The present invention eliminates such disadvantages, eliminates the need for a separate molding step, and eliminates the assembling step.
Moreover, it is an object of the present invention to provide a string stopper having a configuration in which a plug does not accidentally fall out of a socket and a molding die therefor.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention has a through-hole in a socket having a string insertion hole through which a string is inserted into the front and rear wall portions, the hole being aligned with the string insertion hole. In a string stopper made of a synthetic resin in which a plug is stored and a string inserted through the string insertion opening and the through hole is engaged and fixed by urging in a pulling-out direction with respect to the plug, a socket insertion portion of the plug Is formed in a wedge shape having an inclined surface in which at least one of the front and rear surfaces becomes thinner downward, and has a retaining piece projecting upward and inclined on the left and right side surfaces of the socket storage portion. It has an opening in the left and right side walls, and has an elastic plate which rises integrally from the bottom surface of the internal space of the socket, and which elastically presses the inclined surface of the socket insertion portion at the tip thereof. There has been a configuration which is characterized by comprising substantially coincides with the bottom of the cord insertion hole.

Preferably, the wedge-shaped socket insertion portion has a guide rib extending from the center of the upper end to the lower end of the inclined surface, and has a flange along the lower end edge of the socket storage portion. The guide rib has an engagement groove to which the guide rib engages, has a contact surface that contacts the flange, and the elastic plate is composed of two pieces having a gap in front and rear.

According to another aspect of the present invention, there is provided a socket having a string insertion hole for inserting a string into the front and rear walls, and a plug having a through hole aligned with the string insertion hole accommodated therein.
A molding die for a synthetic resin string stopper to which a string inserted through the string insertion opening and the through hole is engaged and fixed by urging in a pulling-out direction of the plug. A main mold composed of a movable mold that moves forward and backward, and a left and right slide that is disposed opposite to the left and right sides of the main mold and that is inserted into and removed from a molding space formed between the fixed mold and the movable mold. A slide mold comprising a mold, wherein the main mold and the slide mold are
The main mold has a first gate communicating with the molding space, and a sliding contact fitting portion of the slide mold. And an upper frame forming space formed at a part of the sliding contact fitting portion and for forming an upper frame portion of the left and right openings of the socket between the upper end surface of the slide die. The mold has a socket insertion portion molding space for molding a portion to be inserted into the socket of the plug, and upper left and right side surfaces of the socket insertion portion molding space and an upper frame molding space of the main mold are slide metal. The above-described various objects can be achieved by providing the main configuration of the molding die characterized by being communicated via the upwardly inclined second gate formed in the die.

As a preferred embodiment, in the molding space formed by the main mold and the slide mold, the socket insertion portion molding space is formed by a slide mold, and the front and rear surfaces intersect downward. It is a wedge-shaped inclined surface, and while elastically pressing the inclined surface at the upper end, a molding space for an elastic plate rising from the bottom surface of the socket is formed between the main mold and the slide mold, A linear guide rib forming space is formed from the upper end center to the lower end of the inclined surface of the slide die, and the guide rib is fitted on the same straight line corresponding to the guide rib forming space of the elastic plate forming space. A mating linear fitting groove forming space is formed.

[0010]

In using the cord stopper of the present invention having the above structure, the socket insertion portion of the plug is pushed in from above the socket, and the wedge-shaped socket insertion portion is pushed down against the elasticity of the elastic plate from the side. Then, the elastic plate is elastically deformed outward from its base end by the inclined surface and pushed down, and is lowered until the flange formed at the upper end of the plug comes into contact with the upper end of the socket. At this time, preferably, the guide rib formed on the plug is engaged and guided in the engagement guide groove of the socket, thereby preventing rattling of the plug. In this state, the front and rear cord insertion openings of the socket are aligned with the through holes of the plug, enabling the strap stopper to slide along the cord. When the cord stopper is moved along the cord and the pressing force of the plug is released at the desired position where fastening is required, the plug presses the inclined surface of the plug by the elastic return force of the elastic plate of the socket, and the plug is pressed. Is moved upward, the string is captured by the string insertion opening of the socket and the through hole of the plug, and the string is fastened and fixed at a desired position by the string stopper.

Here, it should be noted that when the product is taken out of the molding machine when the molding is completed, the tip of the retaining piece formed into the plug is in contact with the lower surface of the upper frame of the socket. Therefore, the plug does not fall out of the socket, which also means that the plug is prevented from dropping out of the socket even if the string comes off for some reason when using the cord stopper.

Next, the procedure for forming the above-mentioned strap fastener with the molding die of the present invention will be described. First, when the previous mold opening is performed and the formed strap fastener is taken out of the mold, first, The movable mold moves toward the fixed mold, and the mold is closed. Next, the left and right slide dies are operated and slide until they approach the inside of the main die, whereby the die is completely closed. When the mold is closed, the injection section moves and injects the molten injection material into the mold from the nozzle section. Here, the mold is clamped. At this time, the molten material injected reaches the first gate through the runner, and is formed from the first gate to the respective parts of the strap fastener formed by the main mold and the slide mold. It flows into the space and molds the socket and plug simultaneously.

That is, the molten material flowing from the first gate first fills the molding space of each part of the plug, and the molten material flowing into the molding space of the socket insertion portion of the slide die is placed on the socket via the second gate. After entering the molding space of the frame, the molding space of the socket insertion portion is sequentially filled into each molding space of the socket. After waiting for the cooling of the molten material filled in all the molding spaces, the left and right slide dies are first retracted, and then the movable dies start moving and the molds are opened. At this time, the retaining piece formed in the second gate connecting the main mold and the slide mold is easily separated at the connection between the tip and the upper frame of the socket. Next, the string stopper, which is a molded product that adheres to the movable die and moves, is removed from the movable die by a molded product removal unit such as an eject pin, and is stored in the product storage unit.

The procedure of the molding operation described above is merely an example. For example, all of the movable mold and the left and right slide molds simultaneously perform the mold closing operation and the mold opening operation with respect to the fixed mold. It is also possible, and it is not necessarily limited to the above operation procedure.

Thus, the present invention provides a cord stopper having the above-described structure, in a state where the socket insertion portion of the plug is inserted into the socket, and the stopper piece is cut off from the socket, and the lower surface of the upper frame portion is cut off. Are formed simultaneously in contact with The cord stopper of the present invention molded at the same time does not need to be reassembled, and not only fulfills the function of the cord stopper with the simple operation as described above, but also connects the socket and the plug at the time of molding. It has a very rational structure in which the gate molding portion that enables simultaneous molding is used as a retaining piece that prevents the plug from unintentionally falling out of the socket.

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a string stopper according to a first embodiment of the present invention; FIG. 1 is a perspective view from above of a main part when a mold is opened when a socket and a plug are simultaneously molded by a molding die of the present invention. FIGS. 2 and 3 show typical structural examples of the socket and plug of the present invention which are simultaneously molded by the same mold.

The fastener of the present invention comprises a socket and a plug obtained by molding a thermoplastic synthetic resin such as an acetal resin, and is simultaneously formed by a single mold of the present invention as shown in FIG. . First, the strap fastener of the illustrated embodiment will be specifically described with reference to FIGS. The combination form of the socket 1 and the plug 2 shown in these figures is the same as the form immediately after molding as shown in FIG.

According to the illustrated example, the socket 1 has four vertical frame portions 12 having four substantially rectangular cross sections which stand upright from four corners of a rectangular bottom portion 11, and a substantially rectangular portion connecting the upper ends of the vertical frame portions 12. A box-shaped socket body 10 composed of an upper frame 13 having a rectangular cross section, and a pair of front and rear (left and right in FIG. 3) standing upright from the center of the bottom 11 of the socket body 10 in parallel with its long side. Elastic plate 14. Accordingly, openings are formed in the front and rear and left and right (left and right in FIG. 2) of the socket body 10, respectively.
Of these openings, openings formed before and after correspond to the cord insertion opening 15 of the present invention. And the elastic plate 14
The height of the elastic plate 14 is
It is set so that there is a sufficient space between the upper end and the upper end of the cord to insert the cord.

The left and right openings of the openings are inevitably formed by inserting the slide mold 5 into the socket body molding space during molding by the molding die of the present invention described in detail later. Opening 16 to be formed. Furthermore,
The rising base end of the elastic plate 14 rising from the upper surface of the bottom of the socket body 10 is formed at least before and after the base end because the elastic plate 14 is formed by the main mold 3 and the slide mold 5 of the present invention described later. The outer edge is substantially at the same position as the lower side position of the cord insertion opening 15. In this embodiment, the front and rear elastic plates 1 are arranged.
Pressing pieces 1 protruding in the direction approaching each other are provided at the upper end of
4a.

The plug 2 has a flange 21 at the upper end as shown in FIGS. 2 and 3, and has a rectangular cross section which can be fitted into the internal space of the box-shaped socket 1; And a socket insertion portion 22 extending downwardly. The socket insertion part 22
The front and rear surfaces whose thickness gradually decreases downward are inclined surfaces 2
2a. The plug body 2
A through hole 23 is formed in the center of the socket 0 so as to be aligned with the cord insertion opening 15 of the socket body 10. This through hole 23
A locking ridge 23a having a triangular cross section is provided so as to cross the through hole 23 at the center of the bottom surface. Furthermore,
As shown in FIGS. 1 and 2, a stopper piece 24, which is the most important component of the present invention, projects obliquely upward near the upper ends of the left and right side surfaces of the plug body 20. The stopper piece 24 has a protruding end which is the socket 1
Has a function of preventing the plug 2 from falling off from the socket body 10 by abutting against the lower surface of the upper frame portion 13. As will be described in detail later, in addition to this function,
It should be noted that the stopper piece 24 is formed by using the gate portion connecting the plug forming space and the socket forming space formed in the forming die of the present invention as it is.

Further, according to the illustrated example, the socket insertion portion 22 of the plug 2 has a linear shape from the center of the upper end to the lower end of the inclined surface 22a of the socket insertion portion 22 in order to prevent rattling with the socket 1. The guide rib 22b is formed so as to protrude, and a flange 22c is formed along the lower edge of the socket insertion portion 22. On the other hand, an engaging guide groove 14b for engaging and guiding the guide rib 22b is formed at each upper edge of the two elastic plates 14 of the socket 1 so as to cross the same edge. Each of the elastic plates 14 has an abutting surface 14c that abuts the opposing surface of the opposing pressing piece 14a against the front and rear surfaces of the flange 22c.

In using the cord stopper constructed as described above, the socket insertion portion 22 of the plug 2 is pushed from above the socket 1 and the wedge-shaped socket insertion portion 22 is inserted.
The two elastic plates 14 are elastically deformed outward from their base ends by their inclined surfaces 22a and pushed down, and the plugs 2 are pushed down.
Is lowered until the flange 21 formed at the upper end of the socket 1 contacts the upper end of the socket 1. At this time, since the guide rib 22b of the plug 2 is guided by the engagement guide groove 14b of the socket 1, the plug 2 does not rattle. In this state,
The front and rear cord insertion openings 15 of the socket 1 are inserted into the through holes 23 of the plug 2.
And allows the strap to be slid along the two straps S. When the strap stopper is moved along the two straps S and the pressing force of the plug 2 is released at a desired position where the fastening is required, the plug 2 is released by the elastic return force of the elastic plate 14 of the socket 1. 2, the plug 2 is moved upward by pressing the inclined surface 22 a, and two strings S inserted through the string insertion port 15 of the socket 1 and the through hole 23 of the plug 2 as shown in FIG. The string S is clamped and fixed between the upper frame 23 and the lower edge of the plug through hole 23, and the string S is fastened and fixed at a desired position by a string stopper. At this time, FIG.
As shown in (1), the locking ridge 23a projecting upward from the bottom surface of the through hole 23 penetrates into the string S, and furthermore, the movement of the string stopper with respect to the string S is strongly prevented.

It should be noted that when the product is taken out of the molding machine at the completion of the molding, the tip of the retaining piece 24 molded into the plug 2 is connected to the upper frame of the socket 1. 13, the plug 2 does not fall out of the socket 1 because the plug 2 does not fall out of the socket 1. It also means preventing 2 from falling off.

Next, a typical embodiment of a molding die of the present invention for molding the above-described strap fastener will be specifically described with reference to FIGS. FIG. 5 is a partially cutaway sectional view of the mold of the embodiment. The molding die of the strap fastener according to the present embodiment is, as typified by the above-described embodiment, inserted into the socket 1 having the string insertion port 15 through which the string S is inserted into the front and rear walls, A plug 2 having a through hole 23 aligned with the string insertion port 15, and a string S inserted through the string insertion port 15 and the through hole 23 is fixedly engaged by urging in a direction in which the plug 2 is pulled out. This is a molding die for simultaneously molding a synthetic resin string stopper.

As shown in FIGS. 1 and 5, the molding die comprises a fixed die 31 and a main die 3 which is movable toward and away from the fixed die 31, and a left and right side of the main die 3. The slide die 5 is composed of left and right slide dies 51 and 52 which are disposed opposite to each other (left and right in FIG. 5) and are inserted into and removed from a molding space formed between the fixed die 31 and the movable die 32.
The main mold 3 and the slide mold 5 have corresponding molding surfaces for forming a molding space for molding the socket 1 and the plug 2.
In the case of the illustrated example, since the molding surfaces of the fixed mold 31 and the movable mold 32 and the left and right slide molds 51 and 52 are mirror-symmetrical to each other, the movable mold 32 and the right slide mold 52 are centered here. I will explain it. The arrangement of the main mold 3 and the slide mold 5 is the mold arrangement in a horizontal injection molding machine (not shown). However, the arrangement in the vertical injection molding machine, that is, the fixed mold 31 and the movable mold 32 are vertically moved. And both slide dies 51 and 52 can be arranged to be inverted by 90 °.

The main mold 3 has a socket bottom portion between the first gate 33 communicating with the molding space 20A of the plug body 20, the sliding contact portion 34 of the slide mold 5, and the slide mold 5. 11, a vertical frame forming space 12A for molding the vertical frame portion 12 of the socket 1 between the slide mold 5 and the bottom molding space 11A, and a part of the sliding contact fitting portion 34; An upper frame forming space 13A for forming the upper frame portion 13 of the left and right openings 16 of the socket 1 between the upper end surface of the slide die 5 and an elastic plate forming space for forming the outer side surfaces of the pair of front and rear elastic plates 14. 14A. In addition, according to the illustrated example, a protrusion 35 for forming a part of the guide rib 22b of the plug 2 is provided at a substantially central portion of the elastic plate forming space 14A, and a slide surface is provided on the distal end surface of the protrusion 35. Guide rib forming space 3 for forming the lower end of the guide rib 22b between the mold 5 and
5A are formed.

The slide die 5 has a molding surface for forming the bottom 11, the vertical frame 12 and the upper frame 13 of the socket 1 between the main die 3 and the slide die 5, and the main die. Type 3
A pair of front and rear elastic plates 14 are formed between a socket insertion portion forming space 22B having a substantially wedge-shaped cross section for forming the socket insertion portion 22 of the plug 2 and the elastic plate forming space 14A of the main die 3. And an elastic plate forming space 14B. Further, in the center of the socket insertion portion molding space 22B of the slide die 5, a linear rib for molding a portion excluding a lower end portion of a guide rib 22b formed linearly at the center of the socket insertion portion 22 is formed. A guide rib forming groove 35B is formed, and a fitting space 35C in which the protruding portion 35 of the main mold 3 fits is formed at the center upper end edge of the elastic plate forming space 14B.

The slide die 5 is formed with a molding space for a retaining piece 24 which is the most characteristic feature of the present invention. This molding space is simply formed by the retaining piece 2 as described above.
The second gate 36 is a runner for simultaneously forming the socket 1 and the plug 2 without being limited to the formation of the socket 4. According to FIG. 5, the second gate 36 is a submarine gate, and is located near the upper part of the molding space 22B of the socket insertion part 22 of the plug 2 and the upper frame molding space 1 of the socket 1.
It is connected to the lower surface of 3A. According to the illustrated example, the pair of the second gates 36 are formed only on the left and right slide dies 51 and 52, respectively. It is also possible to form a skirt portion forming space (not shown) for integrally forming an inverted skirt portion (not shown) extending upward around the periphery including the gate 36.

In the molding die according to the illustrated example having the above structure, the main die 3 is fixed to the fixed mounting plate and movable via the fixed and movable metal plates of an injection molding machine (not shown) according to a conventional method. In addition to being mounted on the side mounting plate, the slide mold 5 is also mounted on a hydraulic cylinder (not shown) according to a conventional method. A runner or sprue (not shown) communicating with the first gate 33 is formed on the metal plate on the fixed side.

Next, the procedure for forming the strap with the above-described injection molding machine will be described. When the mold is opened last time and the formed string stopper is taken out of the mold, first, the movable mold 32 moves toward the fixed mold 32 to close the mold. Next, the left and right slide dies 51 and 52 are actuated by a fluid pressure cylinder (not shown) to slide until approaching the inside of the sliding contact fitting portion 34 formed on the main die 3 to complete the mold closing. Done. When the mold is closed, the injection unit (not shown) moves to bring the nozzle unit into contact with the locating ring unit formed on the fixed-side mounting plate. Here, injection is performed, and an injection material made of synthetic resin that has been kneaded and melted inside an injection cylinder (not shown) is injected from the nozzle portion into a sprue (not shown). At this time, the mold is clamped. At this time, the molten material injected into the sprue reaches a first gate 33 through a runner (not shown), and from the first gate 33, the main die 3
Then, it flows into the molding space of each part of the strap stopper formed by the slide mold 5, and the socket 1 and the plug 2 are simultaneously molded.

At this time, the molten material flowing from the first gate 33 first fills the molding space of each part of the plug 2, and the molten material flowing into the socket insertion portion molding space 22 B of the slide die 5 is filled with the second gate 36. Through the upper frame forming space 13A, and from the socket insertion portion forming space 22B to the filling space of the socket 1 in order.
Wait for the cooling of the molten material filled in all the molding spaces,
First, after the left and right slide dies 51 and 52 are retracted, the movable die 32 starts to move and the mold is opened. At this time, the retaining piece 24 formed in the second gate 36 connecting the main mold 3 and the slide mold 5 is easily separated at the connecting portion between the tip and the upper frame 13. It is. Next, the cord stopper, which is a molded product attached to the movable mold 32 and moved, is operated by a molded product removal unit such as an eject pin (not shown).
The strap stopper is taken out of the movable mold 32 and is housed in a housing (not shown).

As described above, the cord stopper having the above-described structure of the present invention has the socket insertion portion 22 of the plug 2 inserted into the socket 1, and the retaining piece 24 is separated from the socket 1. Are formed at the same time while being in contact with the lower surface of the upper frame portion 13. The cord stopper of the present invention molded at the same time does not need to be reassembled and not only sufficiently fulfills the function as the cord stopper with the simple operation as described above, but also has a function of connecting the socket 1 and the plug 2 at the time of molding. And a gate forming portion that enables simultaneous molding by connecting the plug 2 to the plug 2 is used as a stopper for preventing the plug 2 from slipping out of the socket 1 unnecessarily.

The present invention can be variously modified as described above, and the present invention is not limited to the above-described embodiment without departing from the spirit thereof. For example, the operation of each mold at the time of the above molding is merely an example, and the molding procedure may employ various modes.

[0034]

As is evident from the above description, the cord stopper of the present invention is molded simultaneously with the socket and the plug assembled, so that not only the production efficiency is excellent but also the inventory management is complicated. In order to prevent the plug from dropping out of the socket easily by using the gate part required during molding as a retaining piece, it is necessary to newly form a molding space for the retaining piece in the molding die This is a very promising invention.

Further, according to the molding die of the strap stopper of the present invention, not only the socket and the plug are molded at the same time in the assembled state as described above, but also the stopper piece coming off the gate portion connecting the socket and the plug. Therefore, processing of the molding space can be minimized, and a very rational mold structure is realized.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an example of a string stopper of the present invention and a molded state thereof.

FIG. 2 is a front view of the cord stopper during molding.

FIG. 3 is a sectional view taken along line II-II in FIG.

FIG. 4 is a cross-sectional view showing a state in which the strap is used.

FIG. 5 is a front view of the molding die according to the present invention, in which the internal structure of the die during cutting of the cord stopper is cut away.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Socket 10 Socket main body 11 Bottom part 11A Bottom forming space 12 Vertical frame part 12A Vertical frame forming space 13 Upper frame part 13A Upper frame forming space 14 Elastic plates 14A, 14B Elastic plate forming space 14a Pressing piece 14b Engagement guide groove 14c Contact Surface 15 String insertion opening 16 Opening 2 Plug 20 Plug body 20A Plug body forming space 21 Flange 22 Socket insertion part 22B Socket insertion part forming space 22a Inclined surface 22b Guide rib 22c Flange 23 Through hole 24 Detent piece 3 Main mold 31 Fixed Mold 32 Movable mold 33 First gate 34 Sliding contact fitting part 35 Projecting part 35A Guide rib forming space 35B Guide rib forming groove 35C Fitting space 36 Second gate 5 Slide mold 51, 52 Left and right slide mold

Claims (6)

(57) [Claims] 1. A plug (2) having a through-hole (23) aligned with the string insertion port is accommodated in a socket (1) having a string insertion port (15) for inserting a string into the front and rear walls. , The cord insertion port
(15) and a string stopper made of a synthetic resin in which the string inserted through the through-hole (23) is engaged and fixed by urging the plug (2) in the pull-out direction. The socket insertion portion (22) has a wedge shape having an inclined surface (22a) that is thinner with at least one of the front and rear surfaces facing downward, and is inclined upward on the left and right side surfaces of the socket insertion portion (22). The socket (1) has an opening (16) on the left and right side walls, rises integrally from the bottom surface of the internal space of the socket (1), and has a leading end at which the socket insertion portion is inserted. Slope of (22) (22a)
Having an elastic plate (14) for elastically pressing the elastic plate (14), and a rising base end of the elastic plate (14) substantially coincides with a bottom side of the cord insertion opening (15). Stopper. 2. An inclined surface (2) of the wedge-shaped socket insertion portion (22).
2a) has a guide rib (22b) from the center of the upper end to the lower end, has a flange (22c) along the lower end edge of the socket insertion portion (22), and has the guide at the tip end of the elastic plate (14). 2. The strap stopper according to claim 1, wherein said rib has an engaging groove to which said rib is engaged, and has a contact surface which comes into contact with said flange. 3. The strap stopper according to claim 1, wherein said elastic plate (14) comprises two sheets having a gap in front and rear. 4. A socket (1) having a string insertion port (15) for inserting a string into the front and rear walls, and a through hole (23) aligned with the string insertion port (15) housed therein. A cord stopper made of a synthetic resin, which is composed of a plug (2), and in which the cord inserted through the cord insertion opening (15) and the through hole (23) is engaged and fixed by urging in the pulling-out direction of the plug (2). A fixed mold (31) and a movable mold (3) that moves back and forth toward the fixed mold (31).
A main mold (3) composed of 2) and a molding formed between the fixed mold (31) and the movable mold (32), which are disposed opposite to the left and right sides of the main mold (3). Left and right slide type that can be inserted into and removed from space
(51, 52), and the main mold (3) and the slide mold (5) form a molding space for the socket (1) and the plug (2). The main mold (3) has a first gate (33) communicating with the molding space and a sliding contact portion (34) of the slide mold (5). )When,
The slide mold is formed at a part of the sliding contact fitting portion (34).
Left and right openings (16) of the socket (1) between the upper end of (5)
An upper frame molding space (13A) for molding the upper frame portion (13),
The slide die (5) has a socket insertion portion molding space (22B) for molding the socket insertion portion (22) of the plug (2), and the left and right sides of the socket insertion portion molding space (22B). The upper side surface and the upper frame forming space (13A) of the main mold (3) are slide molds.
(5) A molding die for a strap fastener, which is communicated via a second gate (36) inclined upwardly formed in (5). 5. In a molding space formed by the main mold (3) and the slide mold (5), the socket insertion portion molding space (22B) is formed by a slide mold (5). The surface is a wedge-shaped inclined surface that crosses below,
The inclined surface is elastically pressed at the upper end, and the molding space (14) of the elastic plate (14) rising from the bottom surface of the socket.
The molding die according to claim 4, wherein A) is formed between the main die (3) and the slide die (5). 6. A linear guide rib forming space (35A) is formed from the center of the upper end of the inclined surface of the slide die (5) to the lower end thereof, and a forming space (14) of the elastic plate (14) is formed.
The linear fitting groove forming space (35B) in which the guide rib (35) is fitted is formed on the same straight line corresponding to the guide rib forming space (35A) of (A). Molding mold.