CN111447984A

CN111447984A - Method and equipment for gluing longitudinal seams of cylindrical bag body and filter bag

Info

Publication number: CN111447984A
Application number: CN201980005868.1A
Authority: CN
Inventors: 姚航; 姚朝胜; 刘建国
Original assignee: Shandong Weike Environmental Protection Technology Co ltd
Current assignee: Shandong Weike Environmental Protection Technology Co ltd
Priority date: 2018-01-12
Filing date: 2019-01-10
Publication date: 2020-07-24
Also published as: WO2019137417A1

Abstract

A longitudinal seam processing method for the cylindrical bag body of dust-removing filter bag features that the adhesive is added to the overlapped surfaces of both sides of filter cloth, and the adhesive is used to bond them together. Meanwhile, matched equipment is provided, and by using a processing mode of combining adhesive glue and sewing, the problems of cloth seam dust discharge at the longitudinal seam of the cylindrical bag body and needle hole dust discharge formed by sewing can be solved while the cylindrical bag body is manufactured, and the dust removal performance of the dust removal filter bag is improved.

Description

Method and equipment for gluing longitudinal seams of cylindrical bag body and filter bag

Technical Field

The invention relates to a method and equipment for gluing longitudinal seams of a cylindrical bag body and a filter bag, and belongs to the field of environmental protection and dust removal.

Technical Field

The dust-removing filter bag is used as a core component of the bag-type dust collector and has decisive influence on the efficiency of the bag-type dust collection. Experimental tests prove that the filter cloth for manufacturing the filter bag has excellent dust filtering performance, but the dust filtering performance of the filter bag is obviously reduced after the filter cloth is manufactured into the dust removal filter bag. The reason is that the filter cloth is required to be made into the filter bag by adopting a sewing process, extremely many needle holes are left on longitudinal seams of the filter cloth in the manufacturing process, and cloth seams among the longitudinal seams can not be completely locked by needle threads, so the needle holes and the cloth seams form main dust discharge channels, and the dust removal efficiency of the dust removal filter bag is seriously influenced. The diameter of the needle holes formed by sewing is generally 0.8-2mm, the diameter of the sewing thread is generally 0.2-0.4mm, the diameter of the dust particles is 0.0001-0.01mm, the dust with smaller particle size can completely penetrate through the needle holes, and the length of the dust removal filter bag is 6 m. A 6m long cloth seam also discharges a large amount of dust.

In order to solve the dust discharge problem of longitudinal seam pinholes and cloth seams, part of people in the industry adopt a method for externally gluing the longitudinal seams. The method for coating the outer surface of the longitudinal seam with glue is adopted, the glue is coated on the outer surface of the longitudinal seam, the glue is easily impacted and washed by external objects and dust, the glue is very easy to fall off, needle holes cannot be effectively blocked, and no measures are taken for cloth seam.

CN104436866B (201410522907.4) discloses a manufacturing method of a pinhole-free dust removal filter bag, which comprises the step of sewing a bag body by three needles, and is characterized in that a hot-pressing composite single-sided sintering-shaped microporous belt is arranged on a sewing needle line of the filter bag, and the microporous belt covers the needle seam of the bag body so as to improve the filtering precision of the needle seam of the sewing filter bag. But the microporous belt is arranged outside the bag body and is easy to wear and fall off, the service life is short, and the production cost is high.

The invention provides a solution for solving the problems of the prior dust-removing filter bag body.

Technical scheme

The invention provides a novel longitudinal seam processing method and equipment and a bag, aiming at the problems of needle holes and cloth seams in the connection mode of the longitudinal seam of the bag body of the existing dust removal filter bag and dust removal.

The invention relates to a method for manufacturing a cylindrical bag body of a dust removal filter bag, which comprises the steps of selecting a filter material capable of filtering dust, cutting the filter material into filter cloth with required size, and overlapping the two sides of the filter cloth together to form the cylindrical bag body, and is characterized in that: and adding a glue agent on the mutual contact surfaces overlapped and connected together at the two sides of the filter cloth, and bonding, fixing and connecting the filter cloth by using the bonding effect of the glue to form a cylindrical bag body.

When the filter material is manufactured into the cylindrical bag body of the dust removal filter bag, firstly, a proper filter material capable of filtering dust is selected, the filter material is cut into a filter cloth roll with a required size, then, two sides of the cut filter cloth are overlapped and lapped together, and the width of the lap joint is generally 15-20 mm (the technology is not limited to the range). The overlapping portions are also known in the industry as a center seam or a longitudinal seam. The invention utilizes the glue to apply the glue on the mutual contact surfaces overlapped and lapped together at the two sides of the filter cloth, and the two lapping surfaces are bonded and fixed by the glue to be connected, thereby forming the cylindrical bag body of the dust removal filter bag. Rather than only using conventional sewing needle threads to sew the longitudinal seam.

The filter material capable of filtering dust can adopt various mature products capable of meeting the requirements of filtering dust. The selection can be carried out by those skilled in the art according to actual needs, for example, aramid fiber, glass fiber, acrylic, P84, PTFE, and the like can be selected.

The adhesive can be selected from mature products in the existing market, has excellent adhesive property with the selected filter material, and can adapt to temperature resistance, acid and alkali resistance, oxidation resistance, hydrolysis resistance and mechanical strength under working conditions (or required). For example; high temperature silica gel, hot melt adhesive, and the like.

Because most glues require a long period of time to cure to develop bond strength. Before the adhesive strength of the glue does not meet the requirement, the two overlapped filter cloths forming the longitudinal seam need to be kept in a state of being filled with the glue and mutually adhered and fixed, and the longitudinal seam can be sewn through a sewing needle to be fixed. Namely, at least two sewing threads are sewed on the longitudinal seam, and the sewed sewing threads are parallel to two overlapped edges of the filter cloth. Meanwhile, the glue is coated between two overlapped and overlapped contact surfaces of the filter cloth and is distributed between at least one sewn two lines (the distribution seam between the two lines is the distribution seam between two overlapped filter cloth layers and between two sewing lines, the inner distribution seam is the distribution seam between the two overlapped filter cloth layers and is close to the inner part of the cylindrical bag body, the outer distribution seam is the distribution seam between the two overlapped filter cloth layers and is close to the outer part of the cylindrical bag body, and the specific positions of the distribution seam between the two lines, the inner distribution seam and the outer distribution seam are shown in the attached figure 6). The glue application point may be located proximate the front or rear of the sewing needle. Preferably, two sewing threads are sewn in the longitudinal seam, glue is applied to the seam between the two threads, the glue being applied at the rear of the sewing needle (front to rear as referred to herein with respect to the production process).

Some people in the industry apply glue to the outer surface of the longitudinal seam to block the needle hole formed by the sewing needle line. On one hand, the glue is on the outer surface, and on the other hand, the tapered glue column large head formed in the pin hole is easy to be removed outside. Moreover, the working external force borne by the lap joint of the filter material is completely borne by the suture, so that the needle hole is continuously expanded in the service period. Therefore, in this way, the adhesive is easily abraded and falls off due to the impact of dust and wind in the external environment. The position of the glue coated by the method is arranged between two lines, and the glue positioned inside is not damaged by the external environment, so that the service life of the glue is prolonged. And has the further advantages that: on one hand, the glue can bond two lapping surfaces of the filter cloth inside, and plays a role in connecting and fixing two sides of the filter cloth to bear the external force, preventing the needle eye from expanding, plugging cloth seams and eliminating dust exhaust channels; on the other hand, the glue is extruded to the needle hole formed by sewing, so that the needle holes on two sides are blocked, and the function of eliminating a needle hole dust exhaust channel is achieved. Moreover, the adhesive can completely block the two overlapped layers of filter materials, and the large end of the conical adhesive column formed by the blocking pin hole is arranged on the inner side and cannot fall off. The outer surface of the traditional longitudinal seam is coated with glue, and the cloth seam and the needle holes of the inner layer filter cloth cannot be blocked.

Another method is that at least one sewing thread is sewed on the lapping surfaces of the two sides of the filter cloth by sewing and simultaneously the glue is coated. When sewing a thread, the smearing position of the glue is arranged at the outer cloth seam and/or the inner cloth seam; when the sewing thread is more than two, the smearing position of the glue is arranged in the inner cloth seam and/or the outer cloth seam, or the inner cloth seam and the cloth seam between at least one two threads, or the outer cloth seam and the cloth seam between at least one two threads, or the inner cloth seam, the outer cloth seam and the cloth seam between at least one two threads. Preferably, sewing a sewing thread, and smearing the adhesive at the inner cloth seam and the outer cloth seam and close to the sewing thread; the method for smearing the adhesive can realize the functions of blocking cloth seams and needle holes and bonding and fixing two overlapped filter cloths.

In another method, since the adhesive needs a certain time to have adhesive strength, the cylindrical bag body generally needs to be placed in a special place for adhesive consolidation after being manufactured, which occupies a large space, and the adhesive consolidation time is long, which also affects the next production process of the production line, resulting in reduced production efficiency. Therefore, two types of glue, namely primary glue (such as silica gel) and auxiliary glue (such as hot melt adhesive) can be selected. When the glue is coated on the mutual contact surfaces overlapped and connected together at the two sides of the filter cloth, the primary glue and the auxiliary glue are used, the primary glue is coated in the middle of the contact surfaces, and the auxiliary glue is coated on the two sides of the contact surfaces. The primary adhesive has the performance that the bonding strength meets the requirements of the use working condition, and the auxiliary adhesive has the performance of quick bonding. The main glue with strong adhesive property is smeared in the middle of the filter cloth, so that the function of bonding and lapping the filter cloth is achieved. And quick-drying auxiliary glue is coated on two sides of the sealing body, so that the sealing body can be quickly solidified, and the main glue is sealed inside the sealing body. The cylindrical bag body manufactured by the method can directly enter the next production process without being independently placed for the solidification of the glue, so that the production cost can be reduced, and the production efficiency can be improved.

In another method, some glue seeds have the characteristics of converting solid state into liquid state (including glue state flow state) under the action conditions of specific temperature, specific mechanical wave and specific electromagnetic wave and converting the glue seeds into solid state again when the action conditions are lost, when the glue seeds are manufactured, the solid glue film is laid between the mutual contact surfaces (namely the cylindrical bag body middle seam) overlapped and connected at the two sides of the filter cloth, the glue melting device is used for pressing and melting the glue film, and the glue agent in the cylindrical bag body middle seam separated from the glue melting device is solidified again to bond the mutual contact surfaces overlapped and connected at the two sides of the filter cloth together. The glue melting device can be high-frequency welding equipment, ultrasonic welding equipment or a conduction heating device according to the characteristics of glue seeds. The devices are mature products on the market and are not described in detail herein.

Further, in the above scheme using the solid adhesive film, after the solid adhesive film is fixed, the two overlapped filter materials and the solid adhesive film placed therebetween are sewn into a whole by a sewing method, and then melted by a glue melting device, thereby completing the bonding of the two overlapped filter materials.

The method for manufacturing the cylindrical bag body of the filter bag cannot be directly realized by using the conventional longitudinal seam gluing equipment for the dust removal filter bag. Therefore, aiming at the method, the invention improves the existing longitudinal seam gluing equipment and provides novel special equipment for gluing the longitudinal seam of the cylindrical bag body of the dust-removing filter bag. The novel longitudinal seam gluing equipment is similar to conventional gluing equipment in main component parts and connection relation, and the main component parts comprise: rubber conveying pipe, rubber pumping device and other structures. This special rubber coating equipment of case key feature lies in: is provided with a glue coating nozzle. The glue nozzles are divided into three types: a middle glue coating nozzle (corresponding to the seam between two lines), an inner side glue coating nozzle (corresponding to the inner seam), and an outer side glue coating nozzle (corresponding to the outer seam). The glue spreading nozzles are respectively connected with respective glue conveying pipes, and the glue spreading nozzles are arranged at the ports of the glue conveying pipes. The glue coating nozzle is generally made of metal or plastic materials which are difficult to deform, and can be of a tubular structure integrated with the glue conveying pipe; or can be connected with the rubber delivery pipe in a split structure. The rubber delivery pipe can be a hard pipe made of metal materials or a hose made of plastic materials. The three rubber conveying pipes are respectively fixed on the frame of the sewing machine through fixing devices or are independently fixed by a bracket arranged at a position close to the working position of the sewing machine, and the fixing devices can be composed of, but not limited to, a pressing plate and screws fixed on the frame.

On the special equipment, a middle gluing nozzle can be arranged in the middle, at least one edge gluing nozzle is arranged on each of two sides, or an inner gluing nozzle and an outer gluing nozzle are arranged on each of two sides. The gluing equipment has four types, namely: meanwhile, the glue spreading device is provided with a middle glue spreading nozzle, an inner glue spreading nozzle, an outer glue spreading nozzle and respective glue conveying pipes. The second type is: is provided with an inner gluing nozzle, an outer gluing nozzle and respective rubber conveying pipes. The third type is: only a middle glue coating nozzle and a middle glue conveying pipe are arranged. The fourth type is: the glue conveying pipe is provided with one of a middle glue coating nozzle and an inner side glue coating nozzle or an outer side glue coating nozzle, and the corresponding glue conveying pipe is also provided. The glue coating nozzle and the glue conveying pipe thereof can also be arranged in a detachable mode, and the type conversion is convenient, so that the manufacturing work of different longitudinal seams can be completed.

The three rubber conveying pipes are connected with one end of the rubber outlet of the rubber barrel through a four-way joint. If the glue conveying amount of the middle glue conveying pipe is different from that of the inner and outer glue conveying pipes or the glue types are different, the middle glue conveying pipe is independently connected with one glue cylinder, and the inner side and the outer side of the middle glue conveying pipe are connected with one or both of the glue cylinders. The rubber cylinder is placed in a specially arranged rubber cylinder fixing device, and the rubber cylinder pushes the rubber in the rubber cylinder to enter the rubber conveying pipe through a piston arranged on a pushing device behind the rubber cylinder. The rubber cylinder fixing device can be a cylindrical fixing device with the diameter slightly larger than that of the rubber cylinder, one end of the cylindrical fixing device is provided with a small hole through which the rubber cylinder can be discharged, the other end of the cylindrical fixing device is provided with a large hole through which the rubber cylinder can be discharged, the rubber cylinder can be placed and fixed, and the rubber discharge of the rubber cylinder is not influenced. The rubber cylinder fixing device and the piston pushing equipment can adopt the existing mature technology, have corresponding products on the market, and can purchase the mature device for the equipment. The rubber cylinder can also be fixed at one position through the bracket so as to discharge the rubber.

Before the sewing machine sews the lapping surfaces of the two filter cloths, the filter cloth lapping limiter is needed to lap the two sides of the filter material together, and the component is arranged in front of a sewing needle of the sewing machine. The middle rubber delivery pipe is limited by the space position, and can be bent and extended into the space between the filter cloth lapping limiter and the sewing needle from one side, so that the middle rubber coating nozzle reaches the required position. Because the distance between the filter cloth lapping limiter and the sewing needle is limited, the difficulty is increased for the arrangement of the middle rubber transmission pipe. In order to solve the problem, a hole capable of penetrating through the middle rubber conveying pipe is arranged in the center of the filter cloth lapping limiter, so that the middle rubber conveying pipe passes through the hole.

The filter cloth lapping limiter is generally similar to an S shape, so the hole is required to be arranged at the central position of the transverse plate in the middle of the limiter, after the hole is arranged at the central position of the limiter, the upper surface and the lower surface of the transverse plate in the middle of the limiter are changed into arc shapes due to the newly added hole, and therefore, the upper transverse plate and the lower transverse plate are required to be correspondingly changed in similar shapes, so that the distance between the upper transverse plate and the lower transverse plate is basically consistent, and the two sides of the filter cloth can easily enter and are.

When the middle gluing nozzle is arranged, the filter cloth lapping limiter with a hole in the center is fixed on the frame, the middle glue conveying pipe penetrates through the hole, and the glue conveying pipe is fixed on the frame through the pressing plate and the screw according to the preset position of the gluing nozzle at the end of the glue conveying pipe.

When the sewing and gluing of the longitudinal seam of the cylindrical bag body are finished, a large amount of glue needs to be coated in order to uniformly distribute the glue in the whole space, which is more wasteful, so that after the gluing is finished, a rolling device can be arranged to roll the coated glue, on one hand, the coated glue can be uniformly coated in the space needing the gluing, two lap surfaces can be completely bonded, and good sealing, bonding and cloth seam plugging effects can be achieved; on the other hand, through rolling, the glue can be extruded to the middle of the needle holes formed by the sewing threads and the filter cloth, so that the glue can block the needle holes. Therefore, the rolling device is arranged for rolling, so that the functions of adhering the adhesive, plugging needle holes and sewing can be better realized.

A special rolling device is arranged at a certain distance behind the gluing nozzle.

The rolling device can be composed of at least one group of rollers, and the rolling device can be fixed on the sewing machine frame or provided with a separate bracket for fixing. Preferably, a group of rollers is selected to form the rolling device, and a separate bracket is arranged for fixing the rolling device. The group of rollers consists of an upper roller and a lower roller, the upper roller is arranged on a supporting arm through a roller shaft, the supporting arm is fixed on a supporting shaft, the supporting shaft is arranged on a separately arranged fixed support, and the supporting shaft can rotate. Sliding friction is formed between the upper roller and the roller shaft thereof so as to adapt to the grinding speed of the filter cloth. In order to ensure the filter cloth to pass through smoothly, the power transmission machine can be connected to the supporting arm, and the upper roller is changed into a driving wheel. In order to facilitate lifting and putting down of the roller, a handle can be connected to the supporting shaft, and the roller can be lifted through the handle. The lower roller is positioned below the upper roller, so that the longitudinal seam of the cylindrical bag body passes through between the two rollers to finish the rolling operation.

The rolling device may also be comprised of at least one roller and a support panel, the roller being connected in a relationship consistent with the upper roller. At gyro wheel below certain distance department, be equipped with supporting panel, the tube-shape bag body is passed through by supporting panel for bag body longitudinal joint can be rolled by the gyro wheel, thereby accomplishes the work of rolling.

In order to quickly solidify the rolled glue, a heating device can be arranged behind the rolling device, and the heating device can be a heating plate or a hot air blowing mode so as to assist the rolled glue to be quickly solidified.

The invention also provides a dust-removing filter bag which is characterized in that the cylindrical bag body of the dust-removing filter bag is manufactured by the method.

Compared with the prior art, the invention greatly improves the quality of the filter bag and reduces the manufacturing cost.

Firstly, the glue is arranged in the lapping contact surfaces at two sides of the filter cloth and is tightly adhered together by using the glue, so that the shearing resistance is generated, and the longitudinal seam connection strength is enhanced, but the glue coating method used in the prior art does not have the function.

Secondly, the area of the glue coating is higher in the area of the overlapped cloth seams, and the cloth seam dust exhaust channel is reliably blocked. The prior art only seals the outer edge of the overlapped longitudinal seam, and the sealed part is easily damaged in the following production process (such as package folding), transportation, installation and use processes.

In the prior art, glue only blocks the pinholes on the outer longitudinal seams, and the large heads of the conical glue columns in the blocked holes are outside and are easy to fall off. The glue can simultaneously block the pinholes on the outer layer and the inner layer lapped filter material cloth seams, and the conical glue column does not fall off due to the large head.

Fourth, the glue coated in the prior art is easily subjected to collision friction and dust scouring on the outer surface of the longitudinal seam of the filter bag, and meanwhile, the corrosion resistance condition is poor. The glue in the technology is wrapped by two layers of filter cloth which are lapped, so that the defects of collision friction and dust scouring in the prior art are overcome, and a certain protection effect on corrosion is achieved.

And fifthly, the rolling device arranged in the technology can fully compact and contact the glue with the filter material and the sewing thread, so as to be beneficial to firm bonding. The prior art is coated with glue, so that sufficient contact pressure is difficult to apply.

Sixthly, because the technology is characterized in that glue is arranged between two layers of overlapped filter materials, the outer surface of the longitudinal seam of the filter bag cylinder in the production process is free of glue, and therefore, the subsequent production process is not affected before the glue is not solidified and has strength.

Compared with the prior art, the glue consumption of the technology is expected to be saved by 50%, and the manufacturing cost is reduced.

Drawings

Fig. 1 is a schematic view of a longitudinal seam gluing device.

FIG. 2 is a partial view of the longitudinal seam of FIG. 1 with glue applied.

Fig. 3 is a schematic top view of the laminating apparatus of fig. 1.

Fig. 4 is a schematic view of the filter cloth overlapping stopper with a hole in the center of fig. 1.

FIG. 5 is a schematic view of an apparatus for manufacturing a longitudinal seam using a solid adhesive film.

Fig. 6 is a schematic sectional view of a cylindrical bag body.

FIG. 7 is a cross-sectional view of a longitudinal seam made by one method.

FIG. 8 is a cross-sectional view of a longitudinal seam made by one method.

FIG. 9 is a cross-sectional view of a longitudinal seam made by one method.

In the figure:

1-sewing machine frame, 2-sewing needle, 3-sewing thread, 4-filter cloth overlap limiter, 5-filter cloth, 6-middle rubber hose, 7-middle glue nozzle, 8-inner glue nozzle, 9-inner rubber hose, 10-outer glue nozzle, 11-outer rubber hose, 12-rubber barrel, 13-pushing cylinder, 14-bracket, 15-supporting panel, 16-roller, 17-rubber barrel fixing device, 18-rubber, 19-power transmission machine, 20-handle, 21-pressing plate and screw, 22-glue melting device, 23-solid rubber film, 24-cloth seam between two lines, 25-inner cloth seam, 26-outer cloth seam.

The specific implementation mode is as follows:

The following examples are illustrative only, and the present technology is not limited thereto.

Example 1

As shown in fig. 1, the filter cloth 5 passes through a filter cloth lapping stopper 4 (see fig. 4) fixed to the sewing machine frame 1, and both ends thereof are lapped with each other. The overlapped portion is called a longitudinal seam, and the sewing needle 2 on the frame 1 sews along the longitudinal seam. The middle rubber delivery pipe 6 is fixed on the frame through a pressing plate and a screw 21, one end of the middle rubber delivery pipe penetrates through the filter cloth lapping limiter 4, the end of the middle rubber delivery pipe is provided with a middle rubber coating nozzle 7, and the middle rubber coating nozzle is positioned in the contact surface of the filter cloth at the two lapping edges and between the two sewing threads 3. The inner side gluing nozzle 8 is connected with the inner side rubber delivery pipe 9, the inner side rubber delivery pipe 9 is fixed on one side of the lower portion of the frame 1 through a pressing plate and a screw 21 and extends into the cylindrical bag body to be formed, and one end of the inner side gluing nozzle 8 can enter one side of two overlapping contact surfaces of filter cloth. The outer side gluing nozzle 10 is connected with the outer side rubber delivery pipe 11, the outer side rubber delivery pipe 11 is connected with one side of the upper part of the frame 1 through a pressing plate and a screw 21, and the outer side gluing nozzle is arranged on one side of the inner side of the lapping contact surface of the filter cloth. The other ends of the three types of rubber conveying pipes are connected with a rubber outlet of a rubber cylinder 12 in a rubber cylinder fixing device 17 through a four-way device. The pushing piston on the pushing cylinder 13 above the rubber cylinder fixing device 17 is in contact with the end part of the rubber cylinder 12, and the pushing piston sends the rubber in the rubber cylinder 12 into each rubber conveying pipe through the pushing action of the pushing cylinder 13.

The rear part of a sewing machine frame 1 is provided with a rolling device, a support panel 15 of a cylindrical bag body after sewing and gluing is arranged on a support 14, a rotatable support shaft is connected on the support on the upper part of the support panel 15, one end of the support shaft is provided with a handle 20, the other end of the support shaft is connected with a support arm, and a roller 16 is in sliding connection with the support arm through a roller shaft. The roller 16 is connected at one end to a power drive 19 connected to the support arm. The longitudinal seam of the sewn and glued tubular bag body passes through the rolling device, and the handle 20 is firstly rotated to lift the rolling roller 16, so that the tubular bag body enters. The handle 20 is loosened after the end of the cylindrical bag body enters, the roller 16 is pressed on the longitudinal seam of the cylindrical bag body through the gravity of the roller, and then the roller 16 is rotated through the power transmission 19, so that the cylindrical bag body is moved during rolling.

In this embodiment, the sewing needle 2 sews two sewing threads 3 in the longitudinal seam, and the middle glue nozzle 7 coats glue in the middle glue delivery pipe 6 on the cloth seam 24 between the two threads. The inner side glue coating nozzle and the outer side glue coating nozzle are coated with glue in the inner cloth gap 25 and the outer cloth gap 26 respectively. Along with the movement of the filter cloth, two sewing threads 3 are sewn on the longitudinal seams of the filter cloth, and glue 18 is coated on the longitudinal seams of the filter cloth, so that a cylindrical bag body is formed. The cross section of the longitudinal seam of the cylindrical bag body is shown in figure 7. The cylindrical bag body after sewing the needle thread and gluing is processed by a rolling device, the glue in the longitudinal joint is uniformly extruded, the longitudinal joint is better bonded, the cloth seam is blocked, and the glue is extruded to the needle hole, so that the needle hole is blocked, and a dust exhaust channel is eliminated.

Example 2

The embodiment 2 is the same as the longitudinal seam gluing device of the embodiment 1, except that the longitudinal seam gluing device of the embodiment 2 is not provided with a middle gluing nozzle 7 and a middle glue conveying pipe 6, and only provided with an inner gluing nozzle 8 and an outer gluing nozzle 10 and corresponding inner glue conveying pipe 9 and outer glue conveying pipe 11. The sewing machine sews only one sewing thread 3 for the longitudinal seam. Firstly, selecting a filter material capable of filtering dust, cutting the filter material into filter cloth with required size, and lapping two sides of the filter cloth to form a cylindrical bag body, sewing a sewing thread 3 by using a longitudinal seam of a sewing machine by utilizing the equipment, and preparing the cylindrical bag body by a method of gluing in an inner cloth seam 25 and an outer cloth seam 26, wherein the longitudinal seam section view of the cylindrical bag body is shown in figure 8.

Example 3

Example 3 is substantially the same as the gluing apparatus of example 1 except that the gluing apparatus of example 3 is provided with only the middle gluing nozzle 7 and the middle hose delivery tube 6, and does not have the inner gluing nozzle 8, the outer gluing nozzle 10, and the hose delivery tube thereof. In this embodiment, two sewing threads are sewn to the longitudinal seam, and the tubular bag body is manufactured by applying glue to the cloth seam 24 between the two sewing threads, and the cross-sectional view of the longitudinal seam of the tubular bag body is shown in fig. 9.

Example 4

As shown in FIG. 5, in this example, a longitudinal seam of a cylindrical bag body is formed by using a solid adhesive film 23. The filter cloth after tailorring passes through filter cloth overlap joint stopper 4, and the chamber both sides overlap joint each other, and the solid glued membrane 23 of installing on the upper bracket of frame simultaneously gets into between the lapped two-layer cloth seam by filter cloth overlap joint stopper 4 one side. After the longitudinal seam is sewn by the sewing needle 2, the longitudinal seam is pressed and simultaneously melted by the glue melting device 22 at the rear part, and the glue melting device can select the existing mature products on the market according to the characteristics of glue seeds, and can be high-frequency welding equipment or ultrasonic welding equipment. And the glue in the longitudinal seam of the cylindrical bag body which is away from the glue melting device is solidified again to bond the mutual contact surfaces of the two sides of the filter cloth which are overlapped and lapped together.

Claims

The method for manufacturing the cylindrical bag body of the dust removal filter bag comprises the steps of selecting a filter material capable of filtering dust, cutting the filter material into filter cloth with required dimensions, and overlapping the two sides of the filter cloth to form the cylindrical bag body, and is characterized in that: and adding a glue agent on the mutual contact surfaces overlapped and connected together at the two sides of the filter cloth, and bonding the glue agent to form a cylindrical bag body.
The method of making a dust filter bag tubular bag body of claim 1,

and sewing at least two sewing threads on the overlapped and overlapped parts of the filter cloth by adopting a sewing method, and coating a seam adhesive on the mutual contact surfaces of the overlapped and overlapped parts of the two sides of the filter cloth and between at least one two threads.
The method of claim 1, wherein at least one seam is sewn to the overlapped portions of the filter cloth by sewing; at least one of the inner cloth seam and the outer cloth seam is coated with glue,

and/or at least one seam coating adhesive is applied between the two lines.
The method of making a dust filter bag tubular bag body of claim 1,

when the glue is coated on the mutual contact surfaces overlapped and connected together at the two sides of the filter cloth, two kinds of glue, namely primary glue and auxiliary glue, are used, the primary glue is coated in the middle of the contact surfaces, and the auxiliary glue is coated on the two sides of the contact surfaces.
The method of making a dust filter bag tubular bag body of claim 1, wherein: and (3) paving a solid adhesive film between the mutually-contacted surfaces of the two sides of the filter cloth which are overlapped and connected together, melting the solid adhesive film by using a glue melting device, and bonding the two layers of overlapped filter cloth.
The method of making a dust filter bag tubular bag body of claim 1, wherein: and (3) paving a clamping solid adhesive film between the mutually-contacted surfaces of the two sides of the filter cloth which are overlapped together, sewing the two overlapped filter cloths and the solid adhesive film together by using a sewing method, melting the solid adhesive film by using a glue melting device, and bonding the two overlapped filter cloths.
The utility model provides a professional equipment that is used for rubber coating of dust bag tube-shape bag body longitudinal joint, includes rubber delivery pipe, pump mucilage binding and puts its characterized in that: and a gluing nozzle is arranged between the mutually lapped contact surfaces at the two sides of the filter cloth and is arranged at the port of the rubber delivery pipe.
The dedicated device as recited in claim 7, wherein: the middle part is provided with a middle glue coating nozzle, and/or

At least one edge gluing nozzle is arranged on two sides, and each gluing nozzle is connected with each rubber conveying pipe.
The dedicated device as recited in claim 7, wherein: also comprises a fixing device;

the rubber delivery pipe is fixed on the frame of the sewing machine through a fixing device or

The bracket is separately arranged and fixed at a position close to the working position.
The dedicated device as recited in claim 9, wherein:

the fixing device is composed of, but not limited to, a pressing plate and a screw fixed on the frame.
The dedicated device according to any one of claims 7-10, characterized by: the filter cloth lapping limiter is used for lapping two sides of the filter cloth together.
The dedicated device as recited in claim 11, wherein: and a hole capable of penetrating through the middle rubber delivery pipe is formed in the middle of the filter cloth lapping limiter.
The dedicated device as recited in claim 7, wherein: a rolling device is arranged behind the gluing nozzle and consists of at least one group of rollers; or

The rolling device is composed of at least one roller and a supporting panel.
The dedicated device as recited in claim 13, wherein:

at least one group of rollers of the rolling device consists of an upper roller and a lower roller, the upper roller is arranged on a support arm through a roller shaft, the support arm is fixed on a support shaft, the support shaft is arranged on a support, the roller shaft is connected with or without a power transmission device, and a lifting handle is arranged on or without the support arm.
The dedicated device as recited in claim 13, wherein:

the rolling device is composed of at least one roller and a supporting panel, the upper roller is arranged on the supporting arm through a roller shaft, the supporting arm is fixed on the supporting shaft, the supporting shaft is arranged on the support, the roller shaft is connected with or without a power transmission device, and the supporting arm is provided with or without a lifting handle.
A dust removal filter bag is characterized in that: the dust-removing filter bag is manufactured by the method of any one of claims 1 to 6.