Waterproof zipper and method for its manufacture

Abstract

Waterproof zipper (1), comprising: a left and a right zipper chain part (61, 62) with a left and a right waterproof support strap (40, 50) and a left and a right row (20, 30) of dome links in which dome links (21, 31) are arranged, wherein the left and the right row (20, 30) of dome links are attached to side edges (41, 51) of the left and the right waterproof support strap (40, 50) and both the left and the right waterproof support strap (40, 50) contain a row (90) of fastening holes with a linear arrangement of fastening holes (91, 92) at a predetermined distance (P1); a connecting film (70) that joins the left and right waterproof carrying straps (40, 50) at a rear end of the waterproof zipper (1); and a rear limiting part (80) which is arranged at a position next to the rear side of the left and right row (20, 30) of dome members, wherein the series (90) of fastening holes in both the left and the right waterproof support band (40, 50) has a plurality of first fastening holes (91) and one or more second fastening holes (92) arranged behind the plurality of first fastening holes (91), wherein each of the first fastening holes (91) is filled by each of the dome members (21, 31), wherein the connecting foil (70) is arranged such that it does not cover the second or at least one of the several second mounting holes (92) in the left and / or the right waterproof support strap (40, 50), and the rear limiting part (80) is arranged such that it fills the at least one second mounting hole (92), and wherein the rear limiting part (80) has an upper section (81) and a lower section (82) which are arranged on the upper and lower sides of the left and right waterproof support bands (40, 50), and the upper section (81) and the lower section (82) are connected to each other only by one or more filling parts (83) which fill the at least one second fastening hole (92) in at least one of the left and right waterproof bands (40, 50).

Description

[Technical field]

[0001] The present disclosure relates to a waterproof zipper and a method for its manufacture. [State of the art]

[0002] Waterproof zippers require more production processes compared to non-waterproof zippers, and their higher production costs can be problematic. In the past, as in Fig. As can be seen in 4 of the patent literature 1, a foil element is laminated onto the underside of a support belt (in particular onto its waterproof layer) by means of a high-frequency welding technique, followed by the formation of a through hole which penetrates the support belt and the foil element, and followed by the formation of a limiting part which is formed by injection molding at a place where the through hole is formed.

[0003] In contrast to the method described above, patent literature 2 discloses an injection molding process in which a boundary part is formed into which a film element is installed / integrated. Specifically, a boundary part is disclosed that has a main body for stopping a slide and a projection extending from the main body. This literature discloses that first through-holes for coupling elements and second through-holes for the boundary part are formed (see Fig. 3 of the same literature).

[0004] Patent literature 3 also discloses an injection molding process in which a boundary part is formed into which a film element is inserted / integrated (see Fig. 6 and paragraph 0042 of the same literature). [Bibliography][Patent Literature] [Patent literature 1] JP 2007 - 215 819 A [Patent literature 2] WO 2013 / 114 529 A1 [Patent literature 3] WO 2019 / 180 758 A1

[0005] From WO 2011 / 077 570 A1, a waterproof zipper is known, comprising a zipper chain section, carrying straps, fastening holes, connecting film, limiting part, and coupling links. The connecting film is arranged such that it exposes at least one second fastening hole and fills the rear limiting part of this fastening hole. [Summary][Technical Problem]

[0006] In cases where a bonding film is laminated onto a left and a right support belt to join the left and right support belts, a perforation process would be required after the lamination process to create a hole so that molten plastic can flow between the upper and lower cavities for injection molding of the rear boundary part (i.e., a hole that passes through the support belt and the bonding film (see Fig. 4 of the patent literature 1)). This also applies to cases where holes remain in the support band, which are formed for the injection molding of dome elements. This is because the holes would be closed by the film element during lamination. Such a perforation process, caused by the lamination of the film part, has proven to be a cause of increased costs for waterproof zippers. [Solution to the problem]

[0007] A waterproof zipper according to one aspect of the present disclosure may comprise: a left and a right zipper chain part with a left and a right waterproof support band and a left and a right row of dome links in which dome links are arranged, the left and the right row of dome links being attached to side edges of the left and the right waterproof support band and both the left and the right waterproof support band having a row of attachment holes with a linear arrangement of attachment holes at a predetermined distance; a connecting film joining the left and the right waterproof support band at a rear end of the waterproof zipper; and a rear limiting part arranged at a position adjacent to the rear side of the left and the right row of dome links.The series of attachment holes in both the left and right watertight support bands comprises a plurality of first attachment holes and one or more second attachment holes arranged relative to the plurality of first attachment holes on one side of the rear boundary section, each of the first attachment holes being filled by the respective dome members. The connecting foil is arranged such that it exposes at least one second attachment hole in at least the left and / or the right watertight support band, and the rear boundary section is arranged such that it fills the at least one second attachment hole.

[0008] In some embodiments, the rear limiting part comprises an upper section and a lower section, which are arranged on the upper and lower surfaces of the left and right waterproof support bands, respectively. The upper and lower sections are connected to each other only by a plurality of filler parts, each of which fills one or more of the second attachment holes in both the left and right waterproof support bands. A pin hole may be formed in the lower section of the rear limiting part, the pin hole extending to reach the connecting foil.

[0009] In some embodiments, a recess or cutout is formed in the connecting film to expose one or more secondary fastening holes in the left and / or right waterproof support strap. The recess or cutout may be completely filled by the rear boundary section. The recess or cutout may be designed such that it does not cross a boundary between the left and right waterproof support straps when the left and right zipper chain sections are closed.

[0010] In some embodiments, one or more secondary mounting holes are arranged at the rearmost position in the row of mounting holes. The number of secondary mounting holes in each of the left and right watertight support bands can be one. The rear limiting part can be designed to at least partially enclose a left and a right dome member, which are arranged at the rear end of the left and right row of dome members. A sprue gate can be formed on the connecting sheet. Another sprue gate, different from the one formed on the connecting sheet, can be formed on the rear limiting part.

[0011] A method for manufacturing a waterproof zipper according to another aspect of the present disclosure comprises: manufacturing a zipper chain section, wherein a series of dome links, in which dome links are arranged, is attached to a side edge of a waterproof support band; forming a connecting film on a zipper chain, which contains a pair of the zipper chain sections; and forming a rear limiting part on the zipper chain by injection molding. Rows of fastening holes, each containing a linear arrangement of fastening holes at a predetermined distance, are formed in the respective left and right waterproof support bands.Each set of mounting holes comprises a plurality of primary mounting holes and one or more secondary mounting holes, arranged relative to the plurality of primary mounting holes on one side of the rear boundary section. The connecting foil is formed by injection molding to expose at least one secondary mounting hole in the left and / or right waterproof support band. The rear boundary section is formed by injection molding to fill the at least one secondary mounting hole.

[0012] In some embodiments, the rear limiting part has an upper section and a lower section which are arranged on the upper and lower sides of the left and right waterproof support bands, and the upper section and the lower section are connected to each other only by a plurality of filler parts, the plurality of filler parts each filling one or more of the second attachment holes in both the left and right waterproof support bands.

[0013] In some embodiments, a recess or cutout is formed in the connecting film to expose one or more second fastening holes in the left and / or right waterproof support strap. [Advantageous effects of the invention]

[0014] According to one aspect of the present disclosure, even in cases where the connecting foil is provided before the rear boundary part is provided, the perforation process carried out for injection molding the rear boundary part would be eliminated, or a number of through holes would be reduced even if such a perforation process were carried out, thereby enabling cost-reduced waterproof zippers. [Brief description of the drawings] Fig. Figure 1 is a schematic top view of a waterproof zipper according to one aspect of the present disclosure. Fig. Figure 2 is a schematic view from below, showing the rear end of the waterproof zipper. Fig. Figure 3 is a schematic partial top view of a left zipper chain section, with dashed circles indicating fastening holes formed at constant intervals in the webbing. Fig. 4 is a schematic cross-sectional view along a dashed line IV-IV in Fig. 3. Fig. Figure 5 is a schematic view of the rear end of the zipper from below, which schematically shows a relationship between the first and second attachment holes, a connecting foil and a rear limiting part. Fig. Figure 6 is a schematic cross-sectional view along a dashed line VI-VI in Fig. 5. Fig. Figure 7 is a schematic cross-sectional view along a dashed line VII-VII in Fig. 5. Fig. 8 is a schematic cross-sectional view along a dashed line VIII-VIII in Fig. 5. Fig. Figure 9 is a diagram of the manufacturing process of a waterproof support belt, showing an extrusion process. Fig. Figure 10 shows a perforation process to form a series of fastening holes. Fig. Figure 11 shows a method for injection molding to form the dome sections. Fig. Figure 12 shows a method for injection molding the connecting film. Fig. Figure 13 shows a method for injection molding the rear boundary part. Fig. Figure 14 is a reference diagram that represents a state in which the dome elements are formed. Fig. Figure 15 is a reference diagram showing a state in which the connecting foil is formed. Fig. Figure 16 is a reference diagram showing a state in which the rear boundary part is formed. Fig. Figure 17 is a schematic view of a modified example of a connecting foil. Fig. Figure 18 is a schematic view of a modified example of a connecting foil. Fig. Figure 19 is a schematic view of a modified example of a connecting foil. Fig. Figure 20 is a schematic view of a modified example of rows of mounting holes. [Description of the embodiments]

[0015] Various embodiments and features are described below with reference to the drawings. A person skilled in the art will be able to combine the respective embodiments and / or features without requiring excessive descriptions and will be aware of the synergistic effects of such combinations. Overlapping descriptions between the embodiments are generally omitted. Referenced drawings primarily serve to describe inventions and are simplified for the sake of clarity. The respective features are to be understood as universal features that are effective not only for the waterproof zippers and methods for their manufacture disclosed herein, but also for other various waterproof zippers and methods for their manufacture not disclosed in this description.

[0016] In the following, a forward-backward direction is understood to be based on the direction of movement of the slider. A left-right direction is perpendicular to the forward-backward direction and parallel to a plane in which the support belts are located. An up-down direction is perpendicular to both the forward-backward and left-right directions. The directions defined here may be defined differently in light of the following descriptions.

[0017] As in the Fig. 1 and Fig. As shown in Figure 2, a waterproof zipper 1 (hereinafter referred to simply as zipper 1) is a band-like element that is elongated in the forward-backward direction and narrow in the left-right direction, and that is attached to an opening in garments or bags to open or close the opening. When the zipper 1 is closed, water cannot normally flow into the interior through the zipper 1 because the zipper 1 is waterproof. Zippers 1 are typically attached to the opening of garments or bags by a process such as heat-sealing, heat welding, or sewing.

[0018] The zipper 1 has a left and a right zipper chain part 61 and 62 in which a left and a right row 20 and 30 of dome links are attached to side edges 41 and 51 of the left and right waterproof support strap 40 and 50; and a slider 11 which moves forward to engage the left and right dome links 21 and 31 of the left and right rows 20 and 30 of dome links, and which moves backward to disengage the left and right dome links 21 and 31.

[0019] The slider 11 is made of plastic or metal and has an upper plate, a lower plate, and a sliding wedge connecting the upper and lower plates. Slider 11 is a slider of a type that is normally used, so detailed descriptions of its design are unnecessary. When slider 11 moves forward and closes the zipper 1, the side edges 41, 51 of the left and right waterproof support strips 40, 50 are brought into pressure contact with each other, thus ensuring the waterproofness of the zipper 1.

[0020] A front limiting element 12 is arranged at a front end of the zipper 1 (in a position in front of and beside the left and right rows 20 and 30 of the dome links). A rear limiting element 80 is arranged at a rear end of the zipper 1 (in a rear position adjacent to the left and right rows 20 and 30 of dome links). The front limiting element 12 and the rear limiting element 80 are formed by injection molding of a thermoplastic material (e.g., polyacetal, polyamide, polypropylene, polybutylene terephthalate, nylon, or polycarbonate). The front limiting element can be designed, for example, as disclosed in patent literature 3. The design of the rear limiting element 80 is discussed further below.The front and rear limiting parts 12 and 80 not only serve to block the movement of the slider 11, but also to ensure watertightness by connecting the left and right waterproof bands 40 and 50.

[0021] The waterproof support belt 40, 50 has a main belt section 42, 52 with an upper and a lower surface in which embossed patterns are formed (see Fig. 3) The side edge 41, 51 is arranged inwards in the left-right direction of the main belt sections 42, 52. The waterproof support belt 40, 50 has a belt base fabric 43 which is covered by a waterproof layer 44 (see Fig. 4) The tape base fabric 43 is designed as a woven or knitted structure, or as a mixed structure of both. The waterproof layer 44 is designed to cover the tape base fabric 43, thus providing waterproofing. The waterproof layer 44 can, for example, be made of a thermoplastic elastomer.

[0022] In the left and right waterproof support bands 40, 50, a row 90 of fastening holes is formed, with fastening holes 91, 92 arranged linearly at a predetermined distance P1 (see Fig. 3 and Fig. 5) Each of the 90 rows of mounting holes comprises a plurality of first mounting holes 91 (see Fig. 3), wherein the first fastening holes 91 are each filled by the coupling members 21, 31. In addition, each of the rows 90 of fastening holes has one or more second fastening holes 92 (see Fig. 5), which are arranged relative to the majority of first mounting holes 91 on one side of the rear boundary part 80. The first mounting holes 91 are each formed for the dome members, and the second mounting holes 92 are formed for the rear boundary part 80. Therefore, the number of first mounting holes 91 is greater than the number of second mounting holes 92. The first and second mounting holes 91 and 92 have the same opening shape and the same opening diameter. Typically, the second mounting hole is located at the rearmost end of the row of mounting holes, and / or the number of second mounting holes is one.

[0023] The dome members 21 and 31 are formed by injection molding from thermoplastic material (e.g., polyacetal, polyamide, polypropylene, polybutylene terephthalate, nylon, or polycarbonate), and the first mounting holes 91 are filled with the material. The dome member 21, 31 adheres to the waterproof support band 40, 50 and would not easily rotate around the first mounting hole 91. The respective dome members are arranged according to the respective first mounting holes. Therefore, in each of the rows 20, 30 of dome members, the dome members 21, 31 are arranged at a predetermined distance P1, which is equal to the distance between the mounting holes 91, 92.

[0024] The dome member 21, 31 has a base section 22, a head 23 and a neck 24, which is arranged between the base section 22 and the head 23 (see Fig. 3) A groove 21j is formed in the end face of the head 23, extending in the forward-backward direction, and the (inner) edge of the waterproof support band 40, 50 (in the right-left direction) is arranged so that it protrudes from the bottom of the groove 21j (see Fig. 4) Furthermore, the coupling member 21, 31 has a shoulder 25 of reduced thickness, arranged on both sides of the neck 24 in the forward-backward direction, and webs 26 of reduced thickness extending outwards from the base section 22 in the right-left direction. The shoulder 25 is inserted into the groove 21j of the head 23 of the interacting coupling member to engage there. The webs 26 are inserted into a space between the upper and lower flanges (not shown) of the slide 11.

[0025] When the zipper 1 is closed, the head 23 of the dome link 21 is inserted between the heads of the adjacent dome links 31 on the front and back. Similarly, the head of the dome link 31 is inserted between the heads 23 of the adjacent dome links 21 on the front and back. The left and right dome links 21, 31 are engaged such that the side edge 41c of the waterproof support strap 40 and the side edge of the waterproof support strap 50 are brought into pressure contact. These side edges can be referred to as strap-connecting side edges.

[0026] The dome element 21, 31 has an upper and a lower dome element section 27 and 28, which are arranged on the top and bottom of the waterproof support band 40, 50, and a filler part 29 that fills the first fastening hole 91 (see Fig. 4) The upper and lower dome segments 27 and 28 are connected to each other via a single filler piece 29. Note that the upper dome segment 27 comprises the upper half of the head, neck, and base section. Similarly, the lower dome segment 28 comprises the lower half of the head, neck, and base section.

[0027] The design of the rear end of zipper 1 is based on Fig. 5-8 described. In addition to the rear limiting part 80, a connecting film 70 is arranged at the rear end of the zipper 1 (behind and beside the left and right rows 20, 30 of dome links). The connecting film 70 is made of a plastic material (e.g., a thermoplastic such as polyacetal, polyamide, polypropylene, polybutylene terephthalate, nylon, or polycarbonate) that is the same material as the rear limiting part 80 or another material. A suitable material can be selected for the plastic of the connecting film 70 that allows the connecting film 70 to deform (e.g., curl or bend) in accordance with the waterproof support strap. By selecting a suitable material, the connecting film 70 could have a moderate degree of softness. In some cases, the softness of the connecting film 70 is greater than that of the rear limiting part 80, but it should not necessarily be limited to this.The connecting foil 70 is arranged so that it crosses the boundary B1 between the left and right waterproof support straps 40 and 50 and covers the undersides of the left and right waterproof support straps 40 and 50.

[0028] For the plastic material of the rear limiting part 80, a suitable material would be selected that can withstand repeated collisions or contact with the slider 11. By selecting a suitable material, the rear limiting part 80 could exhibit sufficient hardness and mechanical strength. In some cases, the hardness or mechanical strength of the rear limiting part 80 is greater than that of the connecting foil 70, but it should not necessarily be limited to this. Embodiments are conceivable in which the softness of the rear limiting part 80 is equal to or greater than that of the connecting foil 70.

[0029] The rear limiting part 80 has upper and lower sections 81 and 82, which are arranged on the upper and lower surfaces of the left and right waterproof support bands 40 and 50. The upper section 81 and the lower section 82 are connected to each other by a plurality of filler parts 83, which fill one or more secondary fastening holes 92 in the left and right waterproof support bands 40 and 50. The rear limiting part 80 is configured to at least partially enclose the left and right dome links 21, 31, which are arranged at the rear ends of the left and right rows 20 and 30 of dome links. This prevents the band connection side edges of the left and right support bands from being exposed.The lower section 82 of the rear limiting part 80 covers the connecting foil 70, and there is no gap between the rear limiting part 80 and the connecting foil 70.

[0030] The connecting foil 70 and the rear limiting part 80 are manufactured separately or in a two-stage injection molding process, so that different suitable materials can be used for the connecting foil 70 and the rear limiting part 80, as discussed above. Furthermore, separate gate locations are formed between the connecting foil 70 and the rear limiting part 80. Note that a gate location can be formed by cutting a solidified plastic between a mold cavity and a gate. A treatment (such as polishing) can be applied to make the gate location less visible. In cases where the connecting foil 70 is laminated to the waterproof support band using high-frequency welding, the second mounting hole 92 may be closed by the connecting foil 70, depending on the position of the connecting foil 70.In cases where the connecting foil 70 is formed by injection molding, the unintentional closing of the second fastening hole 92 would be avoided or prevented by its positioning in the mold.

[0031] It might be possible to laminate the connecting film 70 onto the waterproof support strap using high-frequency welding, provided that the second fastening hole 92 is not covered by the connecting film 70. However, positioning the connecting film 70 on the zipper chain may take longer. Furthermore, during the manufacturing and storage of connecting films 70 of a predetermined size, they may shrink and change size. Even assuming the connecting film 70 is manufactured with a cutout, it could change shape during melting and tacking, leading to unwanted deformation and making it difficult to tack the connecting film 70 as intended.Furthermore, it would be a training burden for the factory workers involved in production, as high-frequency welding requires expertise and experience in handling a high-frequency power source.

[0032] In the present embodiment, the connecting foil 70 is arranged such that it exposes at least one second fastening hole 92 in the left and / or the right waterproof support band 40 and 50, and the rear limiting part 80 is arranged such that it fills the at least one second fastening hole 92. According to this feature, even in cases where the connecting foil 70 is formed separately from the rear limiting part 80, a fastening hole that is part of the series 90 of fastening holes could be designated as the second fastening hole 92 for the rear limiting part 80, thereby eliminating the perforation process performed for the rear limiting part 80 or reducing the number of through holes, even if the perforation process is carried out.

[0033] A recess or cutout 76 can be formed in the connecting foil 70 to expose the at least one second fastening hole 92 in the left and / or right waterproof support strap 40 and 50 (see Fig. 5) The connecting foil 70 can be positioned as close as possible to the rows 20 and 30 of dome links, thereby reducing the possibility of water leakage through the boundary B1 between the waterproof support bands 40 and 50 at a point between the connecting foil 70 and the left and right rows 20 and 30 of dome links.

[0034] The recess or cutout 76 is completely filled by the rear limiting part 80 (the plastic material of the rear limiting part 80) and is not visible on the outside of the zipper 1. The rear limiting part 80 has a filling section 84 that fills the recess or cutout 76, and the filling section 84 is connected to the filling part 83 that fills the second fastening hole 92 (see Fig. 6) Note that induced water leakage is to be feared if the recess or cutout 76 were exposed outside the rear boundary part 80.

[0035] The recess or cutout 76 is formed such that it does not cross the boundary B1 between the left and right waterproof support straps 40 and 50 when the left and right zipper chain parts 61 and 62 are closed. This reduces the possibility of water leakage through the boundary B1, which would otherwise occur if the recess or cutout 76 were located at the boundary B1.

[0036] In the lower section 82 of the rear boundary part 80, a pin hole 85 is formed, extending to the waterproof support band 40, 50 or the connecting film 70. Optionally, a pin hole 85 is formed in the upper section 81 of the rear boundary part 80, extending to the waterproof support band 40, 50. This prevents the waterproof support bands 40, 50 from folding over during the injection molding of the rear boundary part 80.

[0037] Note that after forming the connecting foil 70, it would be possible to create a through-hole that passes through the laminate of the waterproof support band 40, 50 and the connecting foil 70, and to use it as a cavity connecting channel for injection molding the rear boundary part 80. Even in this case, the number of newly formed through-holes would be reduced due to the second mounting hole 92, which is not covered by the connecting foil 70, thus enabling a minimized and cost-reduced perforation tool.

[0038] The following describes a method for manufacturing zippers 1 with reference to Fig. 9-16 described. First, as in Fig. Figure 9 shows a waterproof support belt produced by extrusion. In particular, a belt base fabric 43 is fed into a mold 101, and the top and bottom surfaces as well as the side edge 41c of the belt base fabric 43 are covered with molten elastomer, which fills a feed channel in the mold 101. The elastomer hardens to form the waterproof layer 44.

[0039] The waterproof carrying strap is then perforated, as shown in Fig. Figure 10 shows that the waterproof support belt is fed directly under perforating punches 102, and the perforating punches 102 are moved downwards to form the first and second fastening holes 91 and 92. The waterproof support belt is inserted between a pressure roller 104 and a drive roller 105 and transported downstream in accordance with the rotation of the drive roller 105. The downward movement of the perforating punches 102 is synchronized with the downstream transport of a predetermined length of the waterproof support belt, so that the fastening holes can be formed at a predetermined distance P1. For the purpose of stable perforation, a frame 103 can be used in which cylindrical holes are arranged, into which the punches 102 are inserted. The fragments produced during piercing are collected in a box arranged below the frame 103.

[0040] The dome sections are then formed by injection molding, as in Fig. Figure 11 shows that the waterproof support strap with the first and second mounting holes 91 and 92 is inserted between a lower mold 106 and an upper mold 107, and molten plastic is fed into a mold cavity 108 defined by the molds 106 and 107 through a channel (sprue, runner, and gate) to form the dome links. The lower and upper molds 106 and 107 are cooled so that the molten plastic in the mold cavity 108 can solidify. In this way, the dome links that fill the first mounting holes 91 and the zipper chain section with such dome links arranged at a predetermined distance are produced.

[0041] Next, the in Fig. Figure 12 shows the lower and upper molds 111 and 112 being used to produce the connecting film 70 by injection molding. Specifically, the zipper chain parts produced as discussed above are joined to form a zipper chain, and the chain is positioned in a recess on the upper surface of the lower mold 111. The upper mold 112 is stacked on top of the lower mold 111, creating a mold cavity 70' for forming the connecting film 70. Molten plastic is fed into the mold cavity 70' through a channel (sprue, runner, and gate), and the lower and upper molds 111 and 112 are cooled, forming the connecting film 70. The connecting film 70 is formed by injection molding, which more reliably prevents the second mounting hole 92 from being blocked by the connecting film 70.

[0042] Next, the in Fig. Figure 13 shows the lower and upper molds 113 and 114 being used to produce the rear boundary part 80 by injection molding. In particular, the zipper chain, in which the left and right support straps are connected by the connecting film 70, is positioned in a recess on the top of the lower mold 113. The upper mold 114 is stacked on top of the lower mold 113, creating a mold cavity 80' for forming the rear boundary part 80. Molten plastic is fed into the mold cavity 80' via a channel (sprue, runner, and gate), and the lower and upper molds 113 and 114 are cooled, thereby forming the rear boundary part 80.

[0043] The mold cavity 80' comprises a first chamber 81', in which the upper section 81 of the rear boundary part 80 is formed, and a second chamber 82', in which the lower section 82 of the rear boundary part 80 is formed. These first and second chambers 81' and 82' are spatially connected via the at least one second mounting hole 92 (which acts as a cavity connection channel). Therefore, the molten plastic can flow between the first and second chambers via the at least one second mounting hole 92, even if only one of the lower and upper molds is provided with a sprue.

[0044] As described above, the connecting film is formed by injection molding to join the left and right waterproof support straps 40 and 50 of the zipper chain (see Fig. 14 and Fig. 15) The connecting foil 70 is formed such that it does not obstruct the respective second fastening holes 92 in the left and right waterproof support straps 40 and 50. Therefore, a perforation process to form a through-hole passing through the waterproof support strap and the connecting foil could be omitted, or the number of through-holes could be reduced even if such a perforation process were carried out.

[0045] As described above, the rear boundary part 80 is formed by injection molding, and the rear boundary part 80 is formed such that it at least partially encloses the left and right coupling members 21 and 31, which are arranged at the rear end of the left and right row 20 and 30 of coupling members (see Fig. 16) Furthermore, the lower section 82 of the rear boundary part 80 is formed such that it covers the front end section of the connecting foil 70. In addition, a pin hole 85 is formed in the lower section 82 of the rear boundary part 80, extending to the connecting foil 70.

[0046] The following describes variants of the currently disclosed features. As in Fig. As shown in Figure 17, a cutout 76 can be formed in the connecting foil 70. Similar technical effects to those discussed above would also be achieved in such an embodiment. The cutout 76 is shaped to form a step at the leading edge of the connecting foil 70. The cutout 76 does not cross the boundary B1 between the left and right waterproof support strips 40 and 50, which ensures a stronger connection between the left and right waterproof support strips 40 and 50.

[0047] The section 76 can be formed in the connecting foil 70, as shown in Fig. Figure 18 shows similar technical effects to those discussed above. The cutout 76 is shaped to form a V-shaped recess at the leading edge of the connecting foil 70. The cutout 76 crosses the boundary B1 between the left and right waterproof support bands 40 and 50, but is completely filled by the rear limiting part 80. This ensures a certain degree of watertightness of the waterproof support bands 40 and 50.

[0048] In the Fig. In the case shown in Figure 19, a mounting hole 92', which in the above embodiments is used as the second mounting hole 92, is closed by the connecting foil 70. The rear limiting part 80 is arranged so that it only fills a second mounting hole 92.

[0049] In a Fig.In the case shown in Figure 20, the connecting foil 70 is formed such that it covers or fills third fastening holes 93, which differ from the first and second fastening holes in the rows of fastening holes. Note that redundant perforation of the waterproof support strap 40, 50 may be undesirable, as it may lead to a deterioration of the waterproofness.

[0050] A person skilled in the art could make various modifications to the respective embodiments based on the above teachings. The reference numerals in the claims are added for reference purposes only and are not to be used for a narrow interpretation of the scope of protection of the claim. (Reference symbol list) 1 Waterproof zipper 20,30 row of dome sections 21,31 Coupling element 40.50 Waterproof carrying strap 61.62 Zipper chain part 70 Connecting foil 80 Rear boundary part 81 Upper section 82 Lower section 83 Filling part 90 rows of mounting holes 91 First mounting hole 92 Second mounting hole

Claims

[1] Waterproof zipper (1) comprising: a left and a right zipper chain part (61, 62) with a left and a right waterproof support strap (40, 50) and a left and a right row (20, 30) of dome links in which dome links (21, 31) are arranged, wherein the left and the right row (20, 30) of dome links are attached to side edges (41, 51) of the left and the right waterproof support strap (40, 50) and both the left and the right waterproof support strap (40, 50) contain a row (90) of fastening holes with a linear arrangement of fastening holes (91, 92) at a predetermined distance (P1); a connecting film (70) that joins the left and right waterproof carrying straps (40, 50) at a rear end of the waterproof zipper (1); and a rear limiting part (80) which is arranged at a position next to the rear side of the left and right row (20, 30) of dome members, wherein the row (90) of fastening holes in both the left and the right waterproof support band (40, 50) has a plurality of first fastening holes (91) and one or more second fastening holes (92) arranged behind the plurality of first fastening holes (91), wherein each of the first fastening holes (91) is filled by each of the dome members (21, 31), wherein the connecting foil (70) is arranged such that it does not cover the second or at least one of the several second mounting holes (92) in the left and / or the right waterproof support strap (40, 50), and the rear limiting part (80) is arranged such that it fills the at least one second mounting hole (92), and wherein the rear limiting part (80) has an upper section (81) and a lower section (82) which are arranged on the upper and lower sides of the left and right waterproof support bands (40, 50), and the upper section (81) and the lower section (82) are connected to each other only by one or more filling parts (83) which fill the at least one second fastening hole (92) in at least one of the left and right waterproof bands (40, 50). [2] Waterproof zipper according to claim 1, wherein the at least one fastening hole (92) in both the right and the left waterproof band (40, 50) includes the at least one fastening hole (92) that is not covered by the connecting film (70), wherein the upper section (81) and the lower section (82) are connected to each other only via two or more filling parts (83) in total, which fill the at least one second fastening hole (92) in both the left and the right waterproof band (40, 50). [3] Waterproof zipper according to claim 2, wherein a pin hole (85) is formed in the lower section (82) of the rear boundary part (80), the pin hole (85) extending so that it reaches the connecting film (70). [4] Waterproof zipper according to one of claims 1 to 3, wherein a recess or cutout (76) is formed in the connecting film (70) to avoid covering one or more second attachment holes (92) in the left and / or right waterproof support strap (40, 50). [5] Waterproof zipper according to claim 4, wherein the recess or cutout (76) is completely filled by the rear limiting part (80). [6] Waterproof zipper according to claim 4 or 5, wherein the recess or cutout (76) is designed such that it does not cross a boundary (B1) between the left and the right waterproof support strap (40, 50) in a closed state of the left and the right zipper chain part (61, 62). [7] Waterproof zipper according to any one of claims 1 to 6, wherein the at least one second fastening hole (92) is arranged at a rearmost position in the row (90) of fastening holes and no hole is formed behind the at least one fastening hole (92). [8] Waterproof zipper according to one of claims 1-7, wherein the number of second attachment holes (92) in each of the left and right waterproof carrying straps (40, 50) is one. [9] Waterproof zipper according to any one of claims 1 to 8, wherein the rear limiting part (80) is designed to at least partially enclose a left and a right dome member (21, 31) which are arranged at the rear end of the left and right row (20, 30) of dome members. [10] Waterproof zipper according to one of claims 1 to 9, wherein a sprue point is formed on the connecting film (70). [11] Waterproof zipper according to claim 10, wherein a further injection point, which is different from the one formed on the connecting film (70), is formed on the rear boundary part (80). [12] Waterproof zipper according to any one of claims 1 to 11, wherein the rear limiting part (80) is designed to completely enclose at least one dome member (21, 31) which is arranged at the rearmost end of the right and / or left row (20, 30) of dome members. [13] Method for manufacturing a waterproof zipper (1) wherein the method comprises: Manufacturing a zipper chain part (61, 62) wherein a row (20, 30) of dome links in which dome links (21, 31) are arranged is attached to a side edge (41, 51) of a waterproof carrying strap (40, 50); Forming a connecting foil (70) on a zipper chain containing a pair of the zipper chain parts (61, 62); and Forming a rear limiting part (80) on the zipper chain by injection molding, wherein Rows (90) of fastening holes, each containing a linear arrangement of fastening holes (91, 92) at a predetermined distance (P1), are formed in the respective left and right waterproof support band (40, 50), the respective rows (90) of mounting holes have a plurality of first mounting holes (91) and one or more second mounting holes (92) arranged behind the plurality of first mounting holes (91), the connecting film (70) is formed by injection molding in order not to cover the second or at least one of the several second fastening holes (92) in the left and / or the right waterproof support strap (40, 50), and the rear limiting part (80) is formed by injection molding to fill the at least one second mounting hole (92), and wherein the rear limiting part (80) has an upper section (81) and a lower section (82) which are arranged on the upper and lower sides of the left and right waterproof support bands (40, 50), and the upper section (81) and the lower section (82) are connected to each other only by one or more filling parts (83) which fill the at least one second fastening hole (92) in at least one of the left and right waterproof bands (40, 50). [14] Method for manufacturing a waterproof zipper according to claim 13, wherein including at least one fastening hole (92) in both the right and left waterproof band (40, 50) that is not covered by the connecting film (70), wherein the upper section (81) and the lower section (82) are connected to each other only by two or more filling parts (83) in total, which fill the at least one second fastening hole (92) in both the left and the right waterproof band (40, 50). [15] Method for manufacturing a waterproof zipper according to claim 13 or 14, wherein a recess or cutout (76) is formed in the connecting film (70) in order not to cover one or more second fastening holes (92) in the left and / or the right waterproof support strap (40, 50). [16] Method for manufacturing a waterproof zipper according to claim 15, wherein the recess or section (76) is completely filled by the rear limiting part (80).

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