JP4428830B2 - Simple circular knitting bag manufacturing method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rational manufacturing method capable of efficiently mass-producing an inexpensive and durable simple circular knitted bag having no sewing parts.
[0002]
[Prior art]
Recently, simple knitted bags made of knitted fabric are widely used as draining garbage bags for sinks in kitchens and kitchens. This simple knitted bag has much better drainage performance than the conventional synthetic resin film waste bags with many pores, and because it is stretchable, It can be easily attached to a so-called triangular corner), and since it can be made from recycled fibers, it is convenient for effective use of resources.
[0003]
However, the conventional knitted fabric bag has to be subjected to a troublesome sewing process for joining the bottom or sides of the bag at the time of bag making, and this sewing work has resulted in an increase in the manufacturing cost of the knitted fabric bag. .
[0004]
[Problems to be solved by the invention]
The present invention was made in view of the above-described drawbacks in the conventional method for producing a knitted fabric bag, and can efficiently mass-produce a cheap and durable simple circular knitted bag without any sewing points. It is a technical problem to provide a manufacturing method.
[0005]
[Means for Solving the Problems]
In order to solve the above technical problem, the present invention provides a circular knitted bag comprising a bag body 1 made of a cylindrical circular knitted fabric and a bag bottom 2 joined to the ends of the bag body 1. In the manufacturing method, polyurethane elastic yarns are inserted and knitted at both ends of the circular knitted fabric F to knit the edged structure S, and a plurality of cylindrical circular knitted fabrics F are formed in a horizontal pattern at predetermined intervals. side by side, the welding tape I addressed is the opposing state as to bridge the pair of welding the tape T · T to front and rear surfaces of the middle portion to form the bag bottom portion of a circular knitting fabric F · F · · · · heating the corresponding portion between the circular knitted fabric F is welded and fixed by allowed to welding, thereafter, the circular knitted fabric F · F · · · · severing C ₁ along the inner zone portions of the welded fixing portion in the longitudinal direction simple circular knit bag the tape T · T is with welded bag bottom 2 formed by welding by Adopted the technical means that elephants.
[0006]
Further, in order to solve the above technical problem, the present invention provides a circular knitting comprising a bag body 1 made of a cylindrical circular knitted fabric and a bag bottom 2 joined to the ends of the bag body 1. In this bag manufacturing method, polyurethane elastic yarn is inserted and knitted at both ends of the circular knitted fabric F to knit the marginal structure S, and a plurality of cylindrical circular knitted fabrics F are arranged in a horizontal pattern . Tile intervals, the welding tape's have I to the counter state to pass over a pair of welding the tape T · T to front and rear surfaces of the middle portion to form the bag bottom portion of a circular knitting fabric F · F · · · · The circular knitted fabrics F, F,... Are welded and fixed in a band shape by heat-sealing T / T, and then the inner region of the welded fixing portion is circularly knitted fabric F along the longitudinal direction.・ Cleaving C ... ₁ and cutting off the remaining tape T 'remaining between the circular knitted fabrics F and F Therefore, the technical means of manufacturing a simple circular knitted bag having the welding bag bottom portion 2 formed by welding the tapes T and T is characteristic.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the method of the present invention will be described in detail based on an embodiment illustrated in the accompanying drawings (hereinafter referred to as the present embodiment). 1 is an overall perspective view of a circular knitted fabric F used in the method for manufacturing a simple circular knitted bag according to the present embodiment, and FIGS. 2 and 3 are process schematic diagrams of the method for manufacturing the simple circular knitted bag according to the present exemplary embodiment. 4 is an overall perspective explanatory view of a simple circular knitted bag manufactured by the method, and FIG. 5 is a schematic side view of a manufacturing apparatus used in the method.
[0008]
In the manufacturing method of the simple circular knitting bag of the present embodiment, first, a cylindrical circular knitted fabric F having a well-known edged structure S that does not cause “fraying” at both ends is knitted using a known circular knitting machine. (See FIG. 1). The circular knitted fabric F of the present embodiment is configured to be stretchable by knitting a polyethylene terephthalate yarn (20 denier) with a flat knitted structure, and the ear tissue SS at both ends includes polyurethane elastic yarn (20 Denier) is inserted and knitted so that it can be expanded and contracted.
[0009]
As shown in FIG. 2, a plurality of the circular knitted fabrics F knitted in this manner are arranged at a predetermined interval, and the plurality of circular knitted fabrics F, F,... The pair of welding tapes T and T are filled in the opposite state so as to span the front and rear surfaces of the fabric.
[0010]
In this embodiment, as shown in FIG. 5, while conveying a plurality of circular knitted fabrics F arranged on the work trays 30, 30 by the work conveyor 3, By filling the pair of welding tapes T and T wound around the reels 4 and 4 and passing the circular knitted fabric F between a pair of upper and lower press endless belts 5 and 5, The central portion is continuously sandwiched between a pair of welding tapes T and T. In this embodiment, a low-density polyethylene tape having a width of 10 mm, a thickness of 0.2 mm, and a welding temperature of about 160 ° C. is used as the welding tape T.
[0011]
Next, the pair of upper and lower welding tapes T and T are heated and melted, and the welding tape is cooled and solidified in a state where the molten welding tape surrounds the constituent yarns of the circular knitted fabric F. The fabrics at the central portion of each circular knitted fabric F sandwiched between are welded and fixed together. In this embodiment, the upper and lower welding tapes T and T are heated by the two upper and lower heaters 6 and 6 while being sandwiched between the pressing endless belts 5 and 5, and a pair of upper and lower cooling plates 7 on the downstream side of the conveyance thereof. • Cooling is performed at 7 (FIG. 5).
[0012]
Thereafter, the welding fixing portion by the welding tape T is cut C1 to divide each circular knitted fabric F into two parts, and the discard tape T 'remaining between the circular knitted fabrics F and F is cut off (see FIG. 3) A simple circular knitted bag H comprising a bag body 1 made of a cylindrical circular knitted fabric as shown in FIG. 4 and a bag bottom 2 in which the end of the bag body 1 is welded and fixed with a welding tape is manufactured. It is done. In the method of the present embodiment using the apparatus of FIG. 5, the welding fixing portions where the welding tapes T and T are melted by the vertical cutting cutter 8 are moved up and down while each circular knitted fabric FF is conveyed by the work conveyor 3. A simple circular knitted bag H is continuously produced by cutting C1 and cutting the tape T 'with the transverse cutter 9 and then C2.
[0013]
Thus, in the manufacturing method of the simple circular knitted bag of this embodiment, since the cloth bottom of the circular knitted fabric F is welded and fixed with the welding tape to constitute the bag bottom portion 2, the conventional knitted fabric waste Bags can be easily made without any laborious sewing process like a bag, and an extremely inexpensive simple circular knitted bag can be provided.
[0014]
Further, since the welding fixing portion by the welding tape is solidified in a state of surrounding the constituent yarns of the circular knitted fabric F, the fabric at the end of the circular knitted fabric can be securely fixed, and the bag bottom 2 An extremely strong simple circular knitted bag which does not easily generate a wire can be manufactured.
[0015]
Furthermore, in the manufacturing method of the simple circular knitting bag of the present embodiment, the circular knitted fabric F is cut after the fabrics of the circular knitted fabric F are welded and fixed with the welding tape T. Since two simple circular knitted bags can be manufactured simultaneously from the circular knitted fabric F having the ear tissue S, the simple circular knitted bags can be mass-produced efficiently, and the productivity is improved and the simple circular knitted bags It can be provided at low cost.
[0016]
Although the embodiment which is a specific example of the present invention is generally configured as described above, the present invention is not limited to this embodiment, and various modifications are possible within the scope of the claims. It is.
[0017]
【The invention's effect】
As described above, in the method of the present invention, as described with the embodiment, the bottom of the bag is formed by welding and fixing the circular knitted fabrics with a welding tape. The bag can be easily made without any sewing process, and a simple circular knitted bag can be manufactured at a very low cost.
[0018]
In addition, since the welding fixing portion by this welding tape is solidified in a state of surrounding the constituent yarn of the circular knitted fabric, the end fabric of the circular knitted fabric is securely fixed, and a wire is generated at the bottom of the bag. It is possible to provide an extremely durable simple circular knitted bag.
[0019]
Furthermore, the method of the present invention cuts the circular knitted fabrics after welding and fixing them with a welding tape, so that the cutting process is simple and two simple knitted fabrics having ear tissues at both ends are simultaneously used. Since the circular knitted bag can be manufactured, the simple circular knitted bag can be mass-produced efficiently, and the productivity can be improved and the simple circular knitted bag can be provided at low cost.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of a circular knitted fabric used in the method for manufacturing a simple circular knitted bag of the present embodiment.
FIG. 2 is an explanatory view showing a process of disposing a welding tape in manufacturing a simple circular knitted bag of the present embodiment.
FIG. 3 is an explanatory view showing a tape cutting process after a welding tape melting process in the manufacture of a simple circular knitted bag of the present embodiment.
FIG. 4 is an overall perspective view of a simple circular knitted bag manufactured by the method of the present embodiment.
FIG. 5 is a schematic side view of a manufacturing apparatus used in the method of the embodiment.
[Explanation of symbols]
H Simple circular knitting bag F Circular knitted fabric S Edged tissue T Welding tape T 'Disposal tape 1 Bag body 2 Bag bottom

Claims (2)

A method of manufacturing a circular knitted bag comprising a bag body 1 made of a cylindrical circular knitted fabric and a bag bottom 2 joined to the ends of the bag body 1, at both ends of the circular knitted fabric F While knitting the edged structure S by inserting and knitting polyurethane elastic yarn , a plurality of cylindrical circular knitted fabrics F are arranged in a horizontal pattern at predetermined intervals, and bags of these circular knitted fabrics F, F,. welded and fixed to the appropriate site between the circular knitted fabric F by allowed to heat welding the welding tape I addressed is the opposing state to pass over the front and rear surfaces of the middle portion to form the bottom of the pair of welding the tape T · T and, thereafter, welding the tape T · T by the circular knitting fabric F · F · · · · severing C ₁ along the inner zone portions of the welded fixing portion in the longitudinal direction are formed by welding A simple circular knitted bag manufacturing method characterized by manufacturing a simple circular knitted bag having a bag bottom 2 . A method of manufacturing a circular knitted bag comprising a bag body 1 made of a cylindrical circular knitted fabric and a bag bottom 2 joined to the ends of the bag body 1, at both ends of the circular knitted fabric F While knitting the edged structure S by inserting and knitting polyurethane elastic yarn , a plurality of cylindrical circular knitted fabrics F are arranged in a horizontal pattern at predetermined intervals, and bags of these circular knitted fabrics F, F,. by heat welding the welding tape T · T I addressed is the opposing state as to bridge the pair of welding the tape T · T to front and rear surfaces of the middle portion to form the bottom, the circular knitted fabric F · F ... Are welded and fixed in a band shape, and then the inner region of the welded fixing part is divided C ₁ into the circular knitted fabrics F · F along the longitudinal direction, and each circular knitting By cutting off the remaining tape T ′ remaining between the fabrics F and F, the tape TT is formed by welding. A simple circular knitted bag manufacturing method, characterized in that a simple circular knitted bag having a welded bag bottom 2 is manufactured.

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