A method for manufacturing a slider that minimizes damage to the zipper.

Abstract

This product provides a slider that reduces damage to zippers. [Solution] A method for manufacturing a slider, comprising the steps of: preparing a combination mold in which a pair of parallel grooves are formed on the upper inner surface and / or the bottom inner surface of the slider; filling or injecting a certain amount of molten metal or molten plastic into the combination mold; and removing the combination mold from the mold after it has cooled, wherein the pair of parallel grooves are formed by molding on the upper inner surface and / or the bottom inner surface, and at least a portion of the longitudinal boundary mark included on the upper inner surface and / or the bottom inner surface is contained in the pair of parallel grooves.

Description

Technical Field

[0001] The present invention relates to a slider, and particularly to a slider that has grooves provided on its inner surface to collect molten material spilled from the boundary line of a combination mold, thereby minimizing damage to the fastener.

Background Art

[0002] The main body of a slider generally consists of an upper plate (cover), a bottom plate (cover), a pair of side walls, and a link portion connecting the upper cover and the bottom cover, and an internal passage is formed inside it. During use, two chains of the fastener are confined within the internal passage, and the user can pull up and down a tab connected to the main body of the slider to engage or disengage the two chains of the zipper respectively.

[0003] Referring to FIG. 1 showing a three-dimensional view of a conventional slider 1, the conventional slider 1 has an upper plate 11 and a bottom plate 12 facing the upper plate 11, and the upper plate 11 has an upper outer surface 111. Also, a link portion 13 is provided at the front end of the slider 1 and is connected to the upper plate 11. Both the upper plate 11 and the bottom plate 12 have two side walls 14 extending from their two side edges, and a pair of extension portions are respectively connected between the bottom inner surface 122 and the side wall. Further, a pull handle 18 is disposed on the upper outer surface 111 (the pull handle 18 can also be disposed on the bottom outer surface 121). Also, on the bottom inner surface 122a, when the slider 1 is molded, two boundary line marks a and b are formed due to the leakage of molten material from the two boundary lines of a combination mold (not shown).

[0004] More specifically, sliders are manufactured by performing a slider molding process using a combination mold. The slider molding process includes filling or injecting a certain amount of molten metal or molten plastic into a combination mold, and then cooling and removing the combination mold from the mold to manufacture the slider. Regarding the formation of internal passages, before filling or injecting the molten metal or molten plastic, a set of mutually compatible blocks are first inserted into the slider combination mold and then withdrawn after the slider molding is complete, forming the space for the internal passages.

[0005] Figures 2 and 3 show schematic diagrams of the slider 1 after it has been cut open, with both the upper inner surface 112 and the bottom inner surface 122 facing upwards. Each of the upper inner surface 112 and the bottom inner surface 122 has a set of boundary markings a, b, and c generated by a set of mutually matching blocks. More specifically, each of the upper inner surface 112 and the bottom inner surface 122 has a pair of longitudinal boundary markings a, a pair of front lateral boundary markings b, and a pair of rear lateral boundary markings c.

[0006] The front lateral boundary mark b is located at the front end of slider 1 and is connected to the front end of longitudinal boundary mark a. The rear lateral boundary mark c is located at the rear end of slider 1 and is connected to the rear end of longitudinal boundary mark a.

[0007] Furthermore, as is clear from Figure 2, the longitudinal boundary mark a is the path that the two chains 4 and their fixing threads 41 must pass through in order to engage or disengage within the slider 1. Since the fixing threads 41 are sewing threads or warp threads, their path must be kept smooth so as not to damage the fastener.

[0008] In fact, during the slider casting process, the set of abutted blocks repeatedly close and separate from each other, and the continuous collision of the abutted blocks causes cracks and wear. This results in chipping 5 at the boundary marks a, b, and c on the upper inner surface 112 and / or the bottom inner surface 122. Also, as shown in Figure 3, when a set of abutted blocks is withdrawn from the combination mold, repeated friction with the combination mold causes wear on the rear ends of the abutted blocks, which can result in at least one dent or scratch 6. The dent or scratch 6 occurs on the upper inner surface 112 and / or the bottom inner surface 122 of the slider 1, and is more common on one or both sides of boundary mark a.

[0009] The spills 5 formed at the aforementioned boundary marks a, b, and c may damage the zipper. For example, spills 5 at the longitudinal boundary mark a of the slider 1 on the upper inner surface 112 may damage the waterproof layer attached to the surface of the pair of support fabric straps of the zipper, or even damage the surface of the zipper itself. If the chain fixing threads 41 break due to the spills or damage described above, the fastening elements of the chain will detach from the pair of support fabric straps, the zipper will cease to function properly, and the garment on which the zipper is attached will become unusable.

[0010] Furthermore, the aforementioned spills 5 and scratches 6 can wear down the surface of the fastening elements of plastic steel or metal chains, and these defects on the chain can detract from the aesthetic appearance of the garment to which the zipper is attached.

[0011] To address the above problem, the conventional method is to use a small abrasive file to reach slider 1 and remove the chip 5, which is called the trimming process. The size of the abrasive file must be smaller than the internal space of slider 1; otherwise, the internal space will expand, affecting the normal function of the fastener. Therefore, it is not possible to completely remove the chip 5. Also, the abrasive file cannot correct the unevenness of scratch 6.

[0012] Furthermore, slider production volumes are enormous, sometimes reaching tens of thousands, or even millions, of units per batch, making it costly and impractical to remove spills using conventional processes that rub each component. Therefore, minimizing spills onto the internal boundary marks of the slider and thereby reducing damage to the fastener during use is a challenging problem to solve in this field. [Overview of the project] [Problems that the invention aims to solve]

[0013] The main object of the present invention is to provide a slider that has a pair of parallel longitudinal grooves on its upper inner surface and / or bottom inner surface, thereby minimizing damage to the fastener. Each groove accommodates at least a portion of a pair of combination mold boundary marks formed during the manufacturing process of the slider, reducing scratch damage to the fastener caused by spills onto the combination mold boundary marks and extending the life of the combination mold and fastener. [Means for solving the problem]

[0014] To achieve the above objective, a slider has been proposed that can minimize damage to the fastener, comprising an upper plate, a bottom plate opposite the upper plate, and a link portion connecting the upper plate and the bottom plate. The bottom plate has two side walls extending from its two side edges, the upper plate has an upper inner surface and an upper outer surface, and the bottom plate has a bottom inner surface and a bottom outer surface. The internal passage is formed by the upper inner surface, bottom inner surface, side walls, and link portion. The slider is characterized by the formation of a pair of parallel longitudinal grooves on the upper inner surface and / or bottom inner surface to accommodate at least a portion of a set of boundary lines of a combination mold during the molding process. This reduces the amount of molten material leaking from the boundary lines and minimizes damage to the fastener by the slider.

[0015] In one embodiment, the slider further includes at least one pull handle located on the upper outer surface and / or the bottom outer surface.

[0016] In one embodiment, there is a pair of boundary marks on both the upper inner surface and the bottom inner surface. The pair of boundary marks includes a pair of longitudinal boundary marks, with the front transverse boundary mark connected to each longitudinal boundary mark, and the rear transverse boundary mark connected to each longitudinal boundary mark.

[0017] In one embodiment, a pair of top stop receiving portions are formed at the front end of the upper inner surface and / or the bottom inner surface to receive a pair of top stops of a fastener, and each groove is partially located in one of the top stop receiving portions.

[0018] In one embodiment, the grooves each have different widths and depths.

[0019] In possible embodiments, the slider may be a pinless slider, a spring-loaded pin slider, a pressure-type pin slider, a leaf-spring type pin slider, a spring-loaded pin slider for an invisible fastener, and a pinless slider for an invisible fastener.

[0020] In possible embodiments, the slider material may be an alloy metal or a plastic.

[0021] In one embodiment, the intersections of the front and rear horizontal boundary line marks and each vertical boundary line mark have a chamfered or rounded corner shape.

[0022] The present invention further provides a zipper having the slider described above, which minimizes damage to the zipper during use and thereby extends the service life of the zipper.

[0023] The present invention further provides a product equipped with the above-mentioned fastener that provides reliable opening and closing operation.

[0024] In a possible embodiment, the product can be clothing, an article carrier, or camping supplies.

Brief Description of the Drawings

[0025] [Figure 1] It is an external perspective view showing a conventional slider. [Figure 2] It is a plan view showing the bottom inner surface of the slider shown in FIG. 1, and shows the relative positions of the boundary line marks and the chain member. [Figure 3] It is a plan view showing the upper inner surface of the slider shown in FIG. 1, and shows the relative positions of the boundary line marks, spillage, and scratches. [Figure 4a] It is a plan view of the first embodiment of the slider of the present invention, showing that the bottom inner surface has a pair of grooves that accommodate a part of the spillage and scratches on the boundary line mark. [Figure 4b] It is another plan view of the first embodiment of the slider of the present invention, showing the relative positions of the boundary line marks, spillage, and scratches on the upper inner surface. [Figure 4c] It is a cross-sectional view taken along the line X1-X2 of FIG. 4a. [Figure 5a] It is a plan view of the second embodiment of the slider of the present invention, showing a bottom inner surface having a pair of grooves that accommodate a part of the longitudinal boundary line mark and a part of the rear-end transverse boundary line mark. [Figure 5b] It is another plan view of the second embodiment of the slider of the present invention, showing an upper inner surface having a pair of grooves that accommodate a part of the longitudinal boundary line mark and a part of the rear-end transverse boundary line mark. [Figure 5c] It is a plan view of the upper inner surface of the first embodiment, showing that the intersection of the longitudinal boundary line mark and the rear-end transverse boundary line mark is chamfered or has a rounded corner, respectively. [Figure 5d] It is a plan view of the bottom inner surface of the first embodiment, showing that the intersection of the longitudinal boundary line mark and the rear-end transverse boundary line mark is chamfered or has a rounded corner, respectively. [Figure 6a]This is a plan view of a third embodiment of the slider of the present invention, showing that the bottom inner surface has a pair of grooves that accommodate the lateral boundary mark at the front end, a portion of the vertical boundary mark, and a portion of the lateral boundary mark at the rear end. [Figure 6b] This is another plan view showing a slider according to a third embodiment of the present invention, showing that the upper inner surface has a pair of grooves that accommodate the front end lateral boundary mark, a portion of the longitudinal boundary mark, and a portion of the rear end lateral boundary mark. [Figure 7] This is a plan view of a fourth embodiment of the slider of the present invention, showing that a pair of grooves on the upper inner surface and the bottom inner surface accommodate a portion of the front end lateral boundary mark, a longitudinal boundary mark, and a portion of the rear end lateral boundary mark. [Figure 8a] This is a three-dimensional diagram showing a slider according to a fifth embodiment of the present invention. [Figure 8b] This is a plan view of a fifth embodiment of the slider of the present invention, showing that the bottom inner surface has a pair of grooves that accommodate a portion of the front end lateral boundary mark, a longitudinal boundary mark, and a portion of the rear end lateral boundary mark. [Modes for carrying out the invention]

[0026] Most of the components of the slider of the present invention are the same as those of the slider shown in Figure 1. The slider 1 of the present invention comprises an upper plate 11 and a bottom plate 12 arranged opposite each other, the upper plate 11 having an upper outer surface 111 and an upper inner surface 112, and the bottom plate 12 having a bottom outer surface 121 and a bottom inner surface 122. At the front end of the slider 1, the upper plate 11 and the bottom plate 12 are connected by a link portion 13, the upper plate 11 and the bottom plate 12 each having side walls 14 on both side edges, and a pair of extensions 17 each connected to the corresponding side walls 14 of the bottom plate 12. The link portion 13 connects the upper plate 11 and the bottom plate 12 at the front end of the slider 1, and the upper plate 11 and the bottom plate 12 each have side walls 14 at the ends of their respective sides. The pair of extensions 17 are connected to the corresponding side walls 14 and the bottom inner surface 122 of the bottom plate 12, respectively. A pull handle 18 is positioned on the upper outer surface 111, and the pull handle 18 may be positioned on the upper outer surface 111 and / or the bottom outer surface 121 if necessary.

[0027] [First Embodiment] Figures 4a to 4c show a plan view of the bottom inner surface 122, the upper inner surface 112, and a cross-sectional view of the bottom inner surface 122, respectively, of a first embodiment of the slider of the present invention. Figures 4a and 4b show that the slider 1 has only a pair of parallel grooves 8 on the bottom inner surface 122, although of course, if practically necessary, a pair of parallel grooves 8 can also be provided only on the upper inner surface 112. The upper plate 11 and the bottom plate 12 each have two side walls 14 on both sides, with the side walls 14 of the bottom plate 12 being higher than the side walls 14 of the upper plate 11. The grooves 8 are arranged to accommodate a portion of the longitudinal boundary mark a and the rear end transverse boundary mark c.

[0028] Figure 4c, a cross-sectional view along the line X1-X2 in Figure 4a, shows the position of the pair of grooves 8 and the inclined side surface of the grooves 8.

[0029] Furthermore, each side wall 14 has an extension 17 at its lower part, and a boss 15 is formed on the bottom inner surface 122 to stabilize the opening and closing function of the coil-type zipper, such as a nylon zipper or braided zipper, inside the head 1. The shape, width, and height of the boss 15 depend on the shape of the coil-type fastening element of the chain 4 (shown in Figure 2). Therefore, the shape, width, and height of the boss 15 are not particularly limited.

[0030] Furthermore, although both the extension portion 17 and the boss 15 protrude from the bottom inner surface 122, the distance between the extension portion 17 and the boss 15 is large, so the fixing threads 41 of the fastening elements of the chain 4 may still come into contact with the spillage 5 on their respective longitudinal boundary mark a, and may be scratched by the spillage 5 when the slider 1 is pulled along the chain 4. The pair of grooves 8 in this embodiment accommodate some of the spillage 5 and scratches 6 on the longitudinal boundary mark a and the rear end transverse boundary mark c, and the height of the spillage 5 and scratches 6 contained in the grooves 8 can be made lower than their respective inner surfaces 112 and 122, thereby reducing scratches on the fastener.

[0031] In fact, the leading end of each longitudinal boundary mark a gradually descends from the upper inner surface 112 to the corresponding chamfered edge of the groove 8, and finally descends to the bottom side of the groove 8. The groove 8 extends without a clear boundary from below the bottom inner surface 122, including the inclined edge of the groove 8. The position where the longitudinal boundary mark a enters the corresponding area of ​​the groove 8 can be set arbitrarily. The contour shape, depth, and width of each groove 8 do not need to be limited, and each groove 8 may even have a different width or depth depending on the size and requirements of the fastener, although the depth of each groove 8 is preferably 0.05 mm or more.

[0032] [Second Example] Figures 5a and 5b show a second embodiment of the slider of the present invention. This embodiment differs from the first embodiment in that, in addition to the upper inner surface 112, the bottom inner surface 122 has a pair of parallel grooves 8. The bottom plate 12 is higher than the side wall 14 of the upper plate 11, and an extension 17 is formed on the inside of the side wall 14 of the bottom plate 12.

[0033] A pair of grooves 8 are positioned corresponding to the longitudinal boundary mark a, and each groove 8 accommodates the entirety of the longitudinal boundary mark a, a portion of the front transverse boundary mark b, and a portion of the rear transverse boundary mark c. The upper inner surface 112 and the lower inner surface 122 each have a boss 15. The boss 15 and the extension 17 are used to stabilize the opening and closing function of the coil-type zipper, such as a nylon zipper or a braided zipper, within the slider 1. The shape, width, and height of the boss 15 do not need to be particularly limited, as they depend on the shape of the fastening elements of the chain 4.

[0034] Furthermore, although both the extension portion 17 and the boss 15 are above the bottom inner surface 122, the distance between the extension portion 17 and the boss 15 is very wide, so the fixing thread 41 of the fastening element of the chain 4 may still come into contact with the spillage 5 on the longitudinal boundary mark a when the slider 1 is pulled along the chain 4, and may be scratched by the spillage 5. The groove 8 of this embodiment can absorb the spillage 5 and scratches 6 on the longitudinal boundary mark a and the rear end lateral boundary mark c, thereby reducing damage to the fastener.

[0035] Furthermore, when die-casting the slider, if the sliding blocks in the combined mold interlock and are subjected to impact, the slider may break. Also, there is a significant amount of material spillage at the intersection of the longitudinal boundary mark a and the rear end transverse boundary mark c. To solve this problem, as shown in Figures 5c and 5d, both ends of the slide block may be designed so that the intersection of the longitudinal boundary mark a and the rear end transverse boundary mark c has a chamfered or rounded shape. However, the present invention is not limited thereto, and any shape that can solve the problem of excessive spillage can be used instead.

[0036] The tip of the longitudinal boundary mark a of slider 1 gradually descends from the upper inner surface 112 and the bottom inner surface 122 toward the corresponding chamfered edge of groove 8, eventually reaching the bottom of the groove. Groove 8 extends from below the upper inner surface 112 and the bottom inner surface 122, each having two chamfered edges. The position where the longitudinal boundary mark a enters the corresponding area of ​​groove 8 can be set arbitrarily. The contour shape, depth, and width of each groove 8 do not need to be limited, and each groove 8 may even have a different width or depth depending on the size and requirements of the fastener, although the depth of each groove 8 is preferably 0.05 mm or more.

[0037] [Third Embodiment] Figures 6a and 6b show a third embodiment of the slider of the present invention, which differs from the first embodiment in the following respects. The slider 1 of this embodiment has a pair of parallel grooves 8 formed on both the upper inner surface 112 and the bottom inner surface 122, and a pair of top stop receiving portions 16 for receiving a pair of top stops (not shown) of a fastener are formed on the front end of the upper inner surface 112 and the bottom inner surface 122. In addition, each groove 8 accommodates the entirety of the longitudinal boundary mark a, a part of the front end transverse boundary mark b, and a part of the rear end transverse boundary mark c.

[0038] Furthermore, a portion of each groove 8 is located within the top stop receiving portion 16, and if necessary, the top stop receiving portion 16 may be enlarged so that a portion of the front end lateral boundary mark b and a portion of the longitudinal boundary mark a are located within the top stop receiving portion 16. The upper plate 11 and the bottom plate 12 each have two side walls 14 on two side edges. Bosses 15 are provided on both the upper inner surface 112 and the bottom inner surface 122, and two extensions 17 are located on the two opposing side walls 14 of the bottom plate 12. The bosses 15 and extensions 17 are used to stabilize the opening and closing function of the coil zipper within the slider 1. The shape, width, and height of the bosses 15 do not need to be particularly limited, as they depend on the shape of the fastening elements of the chain 4.

[0039] Furthermore, although both the extension portion 17 and the boss 15 are above the bottom inner surface 122, the distance between the extension portion 17 and the boss 15 is very wide, so the fixing thread 41 of the fastening element of the chain 4 may still come into contact with the spillage 5 on the longitudinal boundary mark a when the slider 1 is pulled along the chain 4, and may be scratched by the spillage 5. The groove 8 of this embodiment can absorb the spillage 5 and scratches 6 on the longitudinal boundary mark a and the rear end transverse boundary mark c, thereby reducing damage to the fastener.

[0040] The grooves 8 extend from below the upper inner surface 112 and the bottom inner surface 122, each having two chamfered edges. In this embodiment, each groove 8 accommodates all of the vertical boundary mark a, part of the front end horizontal boundary mark b, and part of the rear end horizontal boundary mark c. The contour shape, depth, and width of each groove 8 are not limited, and each groove 8 may even have a different width or depth depending on the size and requirements of the fastener, although the depth of each groove 8 is preferably 0.05 mm or more.

[0041] [Fourth embodiment] Figure 7 shows a fourth embodiment of the slider of the present invention. The slider 1 of this embodiment differs from the first embodiment in that it is used for fasteners having individual toothed fastening elements for a chain, such as metal zippers or plastic steel zippers. Since the top and bottom surfaces of each individual toothed fastening element are essentially flat, there is no need to provide bosses 15 on the upper inner surface 112 and the bottom inner surface 122. As can be seen from Figure 7, the upper plate 11 and the bottom plate 12 each have two side walls 14 on two side edges, and the upper inner surface 112 and the bottom inner surface 122 have substantially the same configuration. Furthermore, the upper inner surface 112 of the slider 1 has a pair of parallel grooves 8, each groove 8 accommodating the entirety of the longitudinal boundary mark a, part of the front end transverse boundary mark b, and part of the rear end transverse boundary mark c.

[0042] The grooves 8 extend from below the upper inner surface 112 and the bottom inner surface 122, each having two chamfered edges. In this embodiment, the depth and width of each groove 8 do not need to be limited, and furthermore, each groove 8 may have a different profile, width or depth depending on the size and needs of the fastener, but the depth of the grooves 8 is preferably 0.05 mm or more.

[0043] [Fifth Example] Figure 8a shows a three-dimensional view of a slider according to a fifth embodiment of the present invention. The slider 1 used in the invisible fastener has a bottom plate 12, with two side walls 14 on two side edges of the bottom plate 12, and a pair of winged flaps 141 extending inward at the top of each side wall 14. A link portion 13 is provided at the front end of the slider 1, and a tapered cover 131 is provided on the top of the link portion 13. The pair of winged flaps 141 and the tapered cover 131 together form a combined upper plate 11a with the same function as the upper plate of a conventional slider, and a Y-shaped gap 19 is formed between the pair of winged cover plates 141 and the tapered cover plate 131, allowing a pair of support fabric straps to protrude out of the slider 1 through the Y-shaped gap 19.

[0044] The joined upper plate 11a has a joined upper inner surface 113, the bottom plate 12 has a joined bottom inner surface 122, each side wall 14 has an extension 17 on its inner side, and each of the joined upper inner surface 113 and bottom inner surface 122 has a boss 15. The extension 17 and boss 15 are used to stabilize the opening and closing of the fastening elements of the chain 4 within the slider 1.

[0045] Figure 8b shows a plan view of the bottom inner surface 122 of the slider 1, which has a pair of parallel grooves 8. Each groove 8 accommodates the entirety of the longitudinal boundary mark a, a portion of the front end lateral boundary mark b, and a portion of the rear end lateral boundary mark c.

[0046] The grooves 8 extend from below the bottom inner surface 122 and each has two chamfered edges. The depth and width of each groove 8 do not need to be limited, and each groove 8 may have a different profile, width or depth depending on the size and needs of the fastener, however, the depth of the grooves 8 is preferably 0.05 mm or more.

[0047] Since all zippers require slider 1 for opening and closing, both the upper and lower inner surfaces of slider 1 must be as flat, or even smooth, as possible to avoid damaging the zipper, specifically the waterproof layer on the zipper's supporting fabric surface, the stitching, the warp and weft threads, or individual toothed fasteners such as metal or plastic steel fasteners. In particular, if the zipper is made of precious metal with a glossy surface, it is usually a top priority to avoid scratching the glossy surface. The groove design of the present invention not only avoids the problem of spillage and scratching of combined mold boundary marks, but also eliminates the need for the conventional spillage trimming process in slider manufacturing. For sliders with particularly stringent requirements, a trimming tool that conforms to the groove shape can be used to efficiently remove large spills on each boundary mark, ensuring that the spills do not rise above the inner surfaces 112, 122 to avoid damaging the zipper.

[0048] Furthermore, the slider of the present invention is applicable to various zipper chains, including, for example, zipper chains having coil-type fastening elements, zipper chains having continuous folding-type fastening elements, metal zipper chains having independent tooth-type fastening elements, plastic-steel zipper chains having independent tooth-type fastening elements, or waterproof zipper chains having coil-type fastening elements. Since the element cross-sectional shape differs for each type of fastener chain, bosses can be formed at corresponding centers on the upper inner surface and the bottom inner surface to stabilize the opening and closing of the zipper within the slider.

[0049] Sliders include pinless sliders, spring-loaded pin sliders, pressure-type pin sliders, leaf-spring type pin sliders, spring-loaded pin sliders for invisible fasteners, and pinless sliders for invisible fasteners. The material may be metal or plastic, but is not limited to these.

[0050] While the present invention has been described using examples and preferred embodiments, it should be understood that the invention is not limited thereto. Rather, the invention is intended to encompass a variety of modifications and similar configurations and procedures, and therefore the appended claims should be interpreted most broadly to encompass all such modifications and similar configurations and procedures. [Explanation of symbols]

[0051] 1 Slider 11 Upper plate 11a Bonded upper plate 111 Upper outer surface 112 Upper inner surface 113 Joined upper inner surface 12 Bottom plate 121 Bottom outer surface 122 Bottom inner surface 13 Link section 131 Tapered Cover 14 Side wall 141 Winged flaps 15 Bosses 16 Top stop receiving section 17 Extension 18 Pull Handle 19 Y-shaped gap 4 chains 41 Fixing thread 5. Spill 6 wounds 8 grooves a Longitudinal boundary mark b Front end lateral boundary line mark c Rear end lateral boundary mark

Claims

1. A method for manufacturing a slider, A step of preparing a combination mold in which a pair of parallel grooves are formed on the upper inner surface and / or the bottom inner surface of the slider, A step of filling or injecting a certain amount of molten metal or molten plastic into the aforementioned combination mold, The process includes the step of cooling and then removing the combination mold from the mold, As described above, the pair of parallel grooves are formed by molding on the upper inner surface and / or the bottom inner surface. A method for manufacturing a slider, characterized in that at least a portion of the longitudinal boundary mark included in the upper inner surface and / or the bottom inner surface is accommodated in the pair of parallel grooves.

2. The aforementioned slider, An upper plate, and a bottom plate opposite the upper plate, A link section connecting the upper plate and the lower plate, The bottom plate has two side walls extending from its two side edges, The upper plate has an upper inner surface and an upper outer surface. The bottom plate has a bottom inner surface and a bottom outer surface. The internal passage is formed by the upper inner surface, the bottom inner surface, the side walls, and the link section. A manufacturing method characterized in that the upper inner surface and / or the bottom inner surface include a pair of longitudinal boundary markings, a front lateral boundary marking connected to the pair of longitudinal boundary markings, and a rear lateral boundary marking.

3. The manufacturing method according to claim 2, characterized in that the pair of grooves are formed to accommodate at least a portion of the longitudinal boundary mark and the rear end transverse boundary mark.

4. The method for manufacturing a slider according to claim 3, wherein the pair of grooves are formed to accommodate the entirety of the longitudinal boundary mark, a portion of the front end transverse boundary mark, and a portion of the rear end transverse boundary mark.

5. The method for manufacturing a slider according to claim 1, wherein the groove is formed on both the upper inner surface and the bottom inner surface.

6. The method for manufacturing a slider according to claim 1, wherein the depth of the groove is 0.05 mm or more.

7. A method for manufacturing a slider according to claim 1, wherein the front end of the longitudinal boundary mark gradually descends from the upper inner surface or the bottom inner surface to the chamfered edge of the groove, and finally reaches the bottom of the groove.

8. The method for manufacturing a slider according to claim 1, further comprising the step of forming the intersection of the longitudinal boundary mark and the rear end transverse boundary mark to have a chamfered or rounded shape.

9. A method for manufacturing a slider according to claim 1, further comprising the step of forming a top stop receiving portion at the front end and positioning a portion of each groove within the top stop receiving portion.

10. A method for manufacturing a slider according to any one of claims 1 to 9, wherein the slider is formed as a pinless slider, a spring-type pin slider, a pressure-type pin slider, a leaf-spring type pin slider, a spring-type pin slider for an invisible fastener, or a pinless slider for an invisible fastener.

Images