CN111642864A

CN111642864A - Injection molding zipper

Info

Publication number: CN111642864A
Application number: CN202010542348.9A
Authority: CN
Inventors: 唐志强
Original assignee: Shen Zhen Hua Sheng Da Zipper Co ltd
Current assignee: Shen Zhen Hua Sheng Da Zipper Co ltd
Priority date: 2020-06-15
Filing date: 2020-06-15
Publication date: 2020-09-11

Abstract

The invention discloses an injection molding zipper, which comprises a cloth belt (1) with two sides, and a front zipper tooth (3) and a back zipper tooth (2) which are respectively arranged on two surfaces of the cloth belt, wherein a zipper tooth neck (22) of the back zipper tooth (2) is inwards narrowed, a zipper tooth head (23) of the back zipper tooth (2) is divided into a lower half part (231) and an upper half part (232), the lower half part (231) extends to a zipper tooth meshing central line (4) along the zipper tooth neck (22), the upper half part (232) is positioned on the other side of the zipper tooth meshing central line (4) and is semicircular, and the lower half part (231) is exposed at two sides of the bottom end. The injection molding zipper provided by the invention has more stable bonding strength and better smoothness.

Description

Injection molding zipper

Technical Field

The invention relates to an injection molding zipper, which has more stable bonding strength through improving back teeth.

Background

At present, in the traditional injection molding zipper on the market, the front and back surfaces of zipper teeth are the same, namely the zipper teeth are symmetrically distributed by taking a cloth belt surface as a center; as shown in fig. 8, the fastener element exposed from the tape portion at the root of the square-block-shaped fastener element in one surface of the tape is first narrowed inward to form a neck portion of the fastener element, then is expanded outward from the neck portion, and is then narrowed to form an oval-shaped head portion of the fastener element. When the zipper teeth on the left side and the right side of the zipper are closed, the tooth head of any one zipper tooth on one side can be embedded into the neck part of the zipper tooth between two adjacent zipper teeth on the opposite side to form meshing. In the meshing of the embedding mode, the stability of the bonding strength of the left side and the right side is limited, although the strength can be increased by increasing the size of the tooth heads, the tooth heads are difficult to embed, and even if the tooth heads are barely embedded, the pulling of the zipper can be unsmooth, so that the hand feeling and the service performance of the zipper are seriously influenced; in addition, although the size of the tooth head can be reduced, meshing can be smooth, the bonding strength of the left and right zipper teeth after meshing is not guaranteed, and the zipper teeth are easy to crack. Therefore, although the injection molding zipper has tough texture, wear resistance, corrosion resistance, rich and colorful color, light material specific gravity and relatively low material unit price, the use of the injection molding zipper on bags and clothes is influenced by the contradiction between the stability and the smoothness of the strength of the injection molding zipper. The method is also a pain point of various production enterprises and customers of clothes and bags in the zipper industry, so that the stability of the strength of the injection molded zipper is improved, and the improvement of the smoothness of the zipper is an urgent need of the enterprises and customers in the zipper industry.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide an injection-molded slide fastener having more stable bonding strength and better smoothness.

The invention aims to be realized by the following technical scheme:

an injection molding zipper comprises a cloth belt 1 with two sides, and a front zipper tooth 3 and a back zipper tooth 2 which are respectively arranged on two surfaces of the cloth belt, wherein a zipper tooth neck 22 of the back zipper tooth 2 is thin inwards, a zipper tooth head 23 of the back zipper tooth 2 is divided into a lower half part 231 and an upper half part 232, the lower half part 231 extends to a zipper tooth meshing central line 4 along the zipper tooth neck 22, the upper half part 232 is positioned on the other side of the zipper tooth meshing central line 4 and is semicircular, and the lower half part 231 is exposed on two sides of the bottom end.

In some embodiments, both sides of the bottom end of the upper half 232 of the rear element 2 are exposed outside the element head 33 of the front element 3.

In some embodiments, both side ends of the upper half 232 of the rear element 2 are rounded.

In some embodiments, the element neck portion 32 of the front element 3 is first tapered inward and then expanded outward, the element head portion 33 of the front element 3 is continuously expanded outward along the element neck portion 32 and then converged into an oval shape, and the top end arc of the upper half portion 232 of the rear element 2 is fitted with the top end arc of the element head portion 33 of the front element 3.

In some embodiments, the element root 31 and the element neck 32 of the front element 3 are each rectangular parallelepiped, and the widths of the element root 31 and the element neck 32 are flush with the narrowest portion of the element neck 22 of the rear element 2;

the element head 33 of the front element 3 is divided into a cuboid 331, a convex body 332 and a circular arc body 333, the cuboid 331 is flush with the element neck 32, and the circular arc body 333 is positioned at the top end of the cuboid and is matched with the circular arc at the top end of the element head 23 of the back element 2;

the protrusion 332 is disposed on the side of the rectangular parallelepiped 331 facing the next element, and the top of the protrusion 332 is flush with the element head 23 of the corresponding back element 2.

In some embodiments, the centerline of the spur 332 overlaps the element meshing centerline 4.

In some embodiments, the convex body 332 has a trapezoidal or pyramidal shape.

The invention has the beneficial effects that:

the zipper back teeth are semicircular teeth heads, and the left and right teeth are in a mutual buckling mode during meshing, so that the zipper bonding strength is more stable, and better smoothness can be achieved. The front surface can be a common conventional injection molding zipper tooth shape, and can also be a zipper tooth shape with the surface style of a metal zipper, and the back surface has rich and colorful colors and good softness.

Drawings

Fig. 1 is a partial schematic view of a fastener element after coupling in accordance with the first embodiment.

Fig. 2 is a view of the back side elements after the coupling of the fastener elements according to the first and second embodiments.

FIG. 3 is a view of the zipper teeth of the first embodiment shown with the front zipper teeth engaged.

Fig. 4 is a partial schematic view of a fastener element after the coupling of the slide fastener shown in the second embodiment.

FIG. 5 is a view of the fastener elements of the second embodiment shown in the rear coupling.

FIG. 6 is a front view and a side view of a single element of the slide fastener shown in the third embodiment

Fig. 7 is a view of the fastener elements of the third embodiment after the coupling of the fastener element.

FIG. 8 is a partial schematic view of a conventional injection molded fastener element after the coupling.

FIG. 9 is a schematic view of the engagement of the elements of the injection molded slide fastener.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Example one

Referring to fig. 1, the injection molded slide fastener of the present embodiment includes a tape 1 having two sides and fastener elements fixed to the tape, in the present case, the fastener elements are divided into front fastener elements 3 and back fastener elements 2 with the tape 1 as a center, and a part of the fastener elements fixed to the tape is referred to as a root of the fastener elements; the part of the exposed cloth belt is divided into a zipper tooth neck part and a zipper tooth head part; after the fastener elements on the both-side tape are engaged, the center line of the engaged portion is set as a fastener element engagement center line 4. As shown in fig. 3, in the present embodiment, the front element 3 is a tooth form of a conventional injection molded slide fastener, the element neck portion 32 of the front element 3 first tapers inwardly and then expands outwardly, and the element head 33 of the front element 3 continues to expand outwardly along the element neck portion 32 and then converges to form an oval shape. As shown in fig. 2, in the present embodiment, the element neck portion 22 of the back element 2 is tapered inward, the element head portion 23 of the back element 2 is divided into a lower half portion 231 and an upper half portion 232, the lower half portion 231 extends to the element meshing center line 4 along the element neck portion 22, the upper half portion 232 is located on the other side of the element meshing center line 4 and is semicircular, the lower half portion 231 is exposed at both sides of the bottom end, and the top end arc of the upper half portion 232 of the back element 2 is fitted with the top end arc of the element head portion 33 of the front element 3, so that the smoothness of the element head portion is ensured. When the left and right sides of the injection molded zipper are engaged, as shown in fig. 9, zipper teeth on the front side of the zipper (conventional injection molded zipper teeth type) are engaged in a manner that oval teeth are embedded with each other, and as shown in fig. 3 after the engagement; meanwhile, the zipper back teeth complete meshing in a mode that semicircular teeth are mutually buckled, and the meshed zipper back teeth are as shown in figure 2. From mechanical structure analysis, the left and right back teeth complete meshing in a mutual buckling mode, the combination stability of the left and right back teeth is far greater than that of the meshing mode that the front left and right teeth are embedded into each other, in other words, the combination strength of the left and right teeth can be completely borne by the back teeth.

Both sides of the bottom end of the upper half 232 of the rear element 2 are exposed outside the element head 33 of the front element 3, and the exposed element heads are partially covered by the element heads 33 of the front elements 3 adjacent to each other on opposite sides (in the state where the both-side elements are engaged), so that the front elements 3 and the rear elements 2 can bear against each other, and therefore, when the engaged slide fastener is subjected to an up-down external force (pushing force) perpendicular to the element surfaces, the mutual bearing between the elements can still ensure that the elements on the left and right sides of the slide fastener do not disengage. When the front zipper teeth 3 and the back zipper teeth 2 can keep mutual pressure bearing and enough bonding strength, the size of the head of the whole zipper teeth is reduced, and the zipper teeth with the reduced size of the head of the whole zipper teeth are smooth, so that the contradiction pain of the bonding strength of the left and right zipper teeth and the smoothness of the zipper of the traditional injection molding zipper in the market at present is solved, namely enough strength and smooth hand feeling. .

(in this embodiment, the premise of reducing the size of the fastener element head is that the front fastener element and the back fastener element can keep bearing pressure with each other)

In addition, in the present embodiment, both side ends of the upper half portion 232 of the back fastener element 2 are rounded, and as shown in fig. 7, both side ends of the upper half portion 232 of the back fastener element 2 are rounded and smooth, which not only improves the appearance, but also facilitates the engagement, so that the slide fastener has better smoothness.

Example two

Referring to fig. 4, the back fastener element 2 of the injection molded slide fastener of this embodiment is similar to the first embodiment, the fastener element neck 22 of the back fastener element 2 is only tapered inward, the lower half portion 231 extends to the fastener element meshing center line 4 along the fastener element neck 22, the upper half portion 232 is located on the other side of the fastener element meshing center line 4 and is semicircular, and the lower half portion 231 is exposed from both sides of the bottom end, so that the back fastener elements on the two side tapes are in a mutual buckling connection mode. This embodiment is an improvement of the front element 3.

As shown in fig. 5, each of the element root 31 and the element neck 32 of the front element 3 is a rectangular parallelepiped, and the widths of the element root 31 and the element neck 32 are flush with the narrowest portion of the element neck 22 of the rear element 2.

The element head 33 of the front element 3 is divided into a cuboid 331, a convex body 332 and a circular arc body 333, the cuboid 331 is flush with the element neck 32, and the circular arc body 333 is positioned at the top end of the cuboid and is matched with the top end circular arc of the element head 23 of the back element 2, so that the smoothness of the whole element head 7 is ensured.

The protrusion 332 is disposed on the side of the rectangular parallelepiped 331 facing the next element, the protrusion 332 is trapezoidal, and the top of the protrusion 332 is flush with the element head 23 of the corresponding back element 2, as shown in fig. 4. The convex bodies 332 of all the front fastener elements on the tape are arranged in one direction, each convex body 332 abuts against the rectangular solid 331 of the front fastener element 3 on the other tape in the meshing state, as shown in fig. 5, the central lines of the convex bodies 332 of the front fastener elements 3 on the two tapes are overlapped, and the front fastener element 3 presents a distinct surface style of the metal slide fastener after the zipper is meshed. In fact, the colors of the zipper teeth of the metal zipper are very limited, except the natural color of the metal material, only a few of limited colors of bronze, antique silver, black nickel and the like which are subjected to chemical coloring treatment exist, and the zipper teeth are endless in color in the scheme of the injection molding zipper; obviously, the injection molding zipper which has rich and colorful colors and presents the surface style of the metal zipper is welcomed by the market.

The center line of the projection 332 overlaps the element meshing center line 4 so that half of the projection is exposed outside the lower half 231 of the rear element 2; the teeth meshing rear convex body 332 on the two side tapes can just cover the upper half 232 of the back side teeth 2 of the corresponding teeth on the other side tape, and each tooth is the same; that is, the half of the protrusion 332 and the upper half 232 of the opposite element are pressed against each other, so that the left and right elements of the slide fastener are not separated from each other when the slide fastener is subjected to an external force (pushing force) perpendicular to the element surfaces, as shown in fig. 4. The front teeth do not need to be embedded into the head parts of the front teeth in the first embodiment, so that the teeth of the zipper are more smoothly meshed.

In addition, in the first embodiment, each fastener element head and two fastener element heads adjacent to the opposite side bear pressure against each other, so that the overall meshed zipper is relatively stiff; in the embodiment, the mutual pressure bearing of the convex body and the head of the opposite side chain element only occurs on one side of the convex body of the chain element, so that the zipper after the chain elements are meshed has better overall softness.

EXAMPLE III

In this embodiment, the injection molded slide fastener of the second embodiment is further improved, as shown in fig. 6, the convex body 332 on the front element 3 in this embodiment is not a trapezoidal shape but a conical shape, and the thickness of the conical convex body 332 is gradually reduced from the bottom of the convex body (i.e., closely attached to the rectangular parallelepiped 331) to the top of the convex body, so that the surface style of the metal slide fastener presented by the front element 3 is more obvious after the slide fastener is engaged.

It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the scope of the appended claims.

Claims

1. The utility model provides an injection molding zipper, contains strap (1) on two sides to and respectively front chain tooth (3) and back chain tooth (2) on two faces of strap, its characterized in that chain tooth neck (22) of back chain tooth (2) narrow inwards, chain tooth head (23) of back chain tooth (2) divide into lower half (231) and first half (232), lower half (231) extend to chain tooth meshing central line (4) along chain tooth neck (22), the another side that first half (232) are located chain tooth meshing central line (4) is semicircle form and bottom both sides expose lower half (231).

2. An injection-molded slide fastener according to claim 1, wherein both sides of the bottom end of the upper half portion (232) of the rear element (2) are exposed to the outside of the element head (33) of the front element (3).

3. An injection-molded slide fastener according to claim 1, wherein both side ends of the upper half portion (232) of the back face fastener element (2) are rounded.

4. An injection-molded fastener chain according to claim 1, wherein the element neck portion (32) of the front element (3) is tapered inward and then expanded outward, the element head portion (33) of the front element (3) is expanded outward continuously along the element neck portion (32) and then tapered to form an oval shape, and the tip end circular arc of the upper half portion (232) of the rear element (2) is fitted to the tip end circular arc of the element head portion (33) of the front element (3).

5. An injection-molded slide fastener according to claim 1, wherein the element root (31) and the element neck (32) of the front element (3) are each a rectangular parallelepiped, and the widths of the element root (31) and the element neck (32) are flush with the narrowest portion of the element neck (22) of the rear element (2);

the zipper head (33) of the front zipper element (3) is divided into a cuboid (331), a convex body (332) and a circular arc body (333), the cuboid (331) is flush with the zipper element neck (32), and the circular arc body (333) is positioned at the top end of the cuboid and is matched with the top end circular arc of the zipper element head (23) of the back zipper element (2);

the convex body (332) is arranged on one side, facing the next zipper element, of the cuboid (331), and the top of the convex body (332) is flush with the zipper element head (23) of the corresponding back zipper element (2).

6. An injection moulded slide fastener as claimed in claim 5, characterised in that the centre line of the protrusion (332) overlaps the element toothing centre line (4).

7. An injection moulded slide fastener as claimed in claim 5 or 6, characterised in that the projections (332) are trapezoidal in shape.

8. An injection moulded zipper as claimed in claim 5 or 6, characterised in that the protrusions (332) are pyramidal.