KR20180000846A - Filter for dust collector and method for manufacturing filter bag for dust collector - Google Patents

Abstract

A filter for a dust collector comprises: a wrinkle-shaped filter membrane in which an inner bending unit and an outer bending unit are alternately formed; a support reinforcing unit consisting of a compressed area formed by compressing part of a front end of the inner bending unit; and a retainer arranged in the filter membrane by being in contact with the support reinforcing unit. According to the present invention, processes for manufacturing a filter bag used in a filter for a dust collector can be simplified and manufacturing time can be effectively reduced.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a filter for a dust collector,

The present invention relates to a filter for a dust collector, and more particularly, to a filter for a dust collector that can be manufactured by a simplified work process using a welding or adhering technique, and a method of manufacturing a filter bag for the filter.

Generally, in order to increase the dust collecting efficiency in the dust collecting apparatus, it is common that the filtration film (filter cloth) is formed of a wrinkle-like folding filter. By increasing the surface area through the folding filter structure such as the wrinkle shape, Can be obtained.

Herein, the foldable filter structure maintains the wrinkle shape based on the sewing. When the conventional filter membrane having such a structure is used as a filter bag (filtration membrane) for a dust collector, there is a problem in durability as well as fine dust is discharged through sewing needle holes There is a problem.

For this purpose, in the case of a dust collecting apparatus, a retainer is disposed inside to retain the cylindrical shape of the filtration film. In the case of a structure in which a wrinkle shape is ensured based on sewing, since the rigidity of the wrinkle portion is weaker than that of the resin processed article, The folded portion (wrinkled inner folded portion) on the inner side of the filtration membrane is subjected to a dust removal process by spraying air blow or the like, for example, by a high-pressure air-air pulse jet, There is a possibility that the filtration efficiency is lowered due to breakage or sewing of the sewing portion, or damage of the filtration membrane due to contact with the retainer may advance prematurely.

Therefore, conventionally, by applying a structure in which the reinforcing cloth (reinforcing member or reinforcing band) is padded in the longitudinal direction of the filtration film to the inner bent portion of the filtration film (filter cloth) contacting the retainer, Thereby preventing the bending portion from being prematurely damaged.

Here, the reinforcing cloth of the inner folded portion is made of the same material as that of the filtration film, for example, and is stuck to the inner bent portion of the filtration film in the longitudinal direction through a sewing step which is manually performed by the operator.

Korean Patent Laid-Open Publication No. 10-2012-0123173 (Published on November 11, 2012)

However, the conventional method of fabricating the filter bag with the structure in which the reinforcing cloth is applied to the inner folded portion of the filtration membrane through the sewing work requires a complicated manufacturing process and requires an excessive time There is a problem that the manufacturing cost of the filter bag is increased.

In addition, since the conventional method for fabricating the filter bag requires the reinforcing cloth to be applied to the inner bent portion of the filtration film, there is a problem that the cost of the fabric (base material) is additionally generated. .

According to one aspect of the present invention, there is provided a support structure comprising: a corrugated filtration membrane formed in a shape in which an inner bent portion and an outer bent portion are alternately formed; a support reinforcing portion formed as a pressed region formed by pressing a tip portion of the inner bent portion; And a retainer disposed on the inner side of the filtration membrane in such a manner that the filter contacts the filter.

The support reinforcement portion of the present invention may be a welded support portion in the form of a melt-pressed type in which a portion of the tip portion is formed by melting a surface layer of a base material by hot air and then being pressed by a pair of rollers.

The supporting reinforcement portion of the present invention may be an adhesive supporting portion in the form of an adhesive pressure bonding formed by pressing a part of the tip end portion of the adhesive with a pair of rollers.

The adhesive of the present invention can be automatically injected into a part of the tip through an adhesive injector.

The adhesive of the present invention may be a thermosetting adhesive or a UV curing adhesive.

The thermosetting adhesive or the UV curable adhesive of the present invention may be any one of hot-melt, acrylate, epoxy, polyurethane (PUR), and silicone adhesives.

According to another aspect of the present invention, there is provided a method of manufacturing a welded member, comprising the steps of: forming a filtration film in a wrinkled shape in which an inner bent portion and an outer bent portion are alternately formed; Thereby forming a filter bag for a dust collector.

In the tip portion of the present invention, the surface layer of the base material can be melted by the hot air blown from the hot air nozzle.

The molten tip portion of the present invention can be squeezed by a pair of rollers composed of a fixing roller and a left and right fluid roller.

The corrugated web of the present invention can be automatically fed to the pair of rollers in a conveyor belt fashion.

According to still another aspect of the present invention, there is provided a method of manufacturing a filter, comprising the steps of: forming a filtration film in a wrinkled shape in which an inner bent portion and an outer bent portion are alternately formed; injecting an adhesive into a tip portion of the inner side of the inner bent portion; And pressing a part of the tip end of the injected inner bending portion to form an adhesive supporting portion in the form of an adhesive press-fit.

The manufacturing method of the present invention may further include a step of curing the adhesive supporting portion at a predetermined temperature condition.

The corrugation shape of the present invention can be held in such a manner that the corrugation between adjacent mountains and mountains in the corrugation is pressed by the pressing wire so that the fabric for filtration membrane is brought into close contact with the corrugated debris table.

The adhesive of the present invention may be a thermosetting adhesive or a UV curing adhesive.

The thermosetting adhesive or the UV curable adhesive of the present invention may be any one of hot-melt, acrylate, epoxy, polyurethane (PUR), and silicone adhesives.

The step of forming the adhesive support portion of the present invention may adhere a portion of the tip portion using a pair of rollers composed of a fixing roller and a left and right flow rollers.

The corrugated web of the present invention can be automatically fed to the pair of rollers in a conveyor belt fashion.

The present invention relates to a filter bag for use in a filter for a dust collector, in which a support reinforcing portion in the form of a compressed shape is formed by welding or adhering a part of the tip of one side bent portion of a filtration membrane constituting a filter for a dust collector, It is possible to realize the process simplification and the effective time reduction of the production time.

In addition, the present invention can effectively prevent unnecessary consumption of the fabric for the filtration membrane (wrinkle fabric) by removing the reinforcing fabric for the inner bending part, which has been applied to the conventional dust filter.

1 is a schematic perspective view of a filter for a dust collector according to the present invention, which schematically shows a cylindrical shape of a filtration membrane.
Fig. 2 is a cross-sectional view taken along line AA of Fig. 1. Fig.
3 is a flowchart illustrating a main process of fabricating a filter bag applied to a filter for a dust collector according to an embodiment of the present invention.
4 is a flowchart illustrating a main process of fabricating a filter bag applied to a filter for a dust collector according to another embodiment of the present invention.
5A is an exemplary photograph of a melting apparatus for melting a tip portion of an inner bent portion according to the present invention.
FIG. 5B is an illustrative photograph showing a principle in which the pair of conveying rollers aligns the fabric and pushes the fabric toward the melting apparatus side according to the present invention.
5C is an exemplary photograph showing a structure in which the fixing roller and the left and right flow rollers are mounted on the rear end of the melting apparatus according to the present invention.
5D is a schematic view for explaining the principle of pressing the molten tip portion of the inner bent portion using the fixing roller and the left and right flow rollers according to the present invention.
6A and 6B are partial schematic views for explaining an adhesive injection device for injecting an adhesive into a part of a tip end of an inner bent portion according to the present invention.
7A is a schematic view of a compression bonding apparatus for pressing a tip portion of an inner bent portion into which an adhesive is injected according to the present invention.
7B is an exemplary sectional view showing a structure in which a tip portion of an inner bent portion into which an adhesive is injected according to the present invention is deformed into an adhesive support in the form of an adhesive press.

First, the advantages and features of the present invention, and how to accomplish them, will be clarified with reference to the embodiments to be described in detail with reference to the accompanying drawings. While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. It is to be understood that the following terms are defined in consideration of the functions of the present invention, and may be changed according to intentions or customs of a user, an operator, and the like. Therefore, the definition should be based on the technical idea described throughout this specification.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic perspective view of a filter for a dust collector according to the present invention, which schematically shows a cylindrical shape of a filtration membrane.

1, a filter for a dust collector according to the present invention may have a structure in which a filtration membrane 110 having a wrinkle shape is prepared in a cylindrical shape and a retainer 120 is inserted into the filter membrane 110 so as to maintain a cylindrical shape . Here, the filter membrane can be defined as a filter bag fabricated according to the present invention.

At this time, the filtration membrane 110 and the retainer 120 do not necessarily have to be cylindrical, and may be deformed according to need or use. Here, the filtration membrane 110 may be provided with a support reinforcing portion on a part of the tip of the inside of the inner bent portion, which will be described in detail later with reference to Fig.

A nonwoven fabric material made of a thermoplastic resin such as a polymer material (e.g., PE, PP, PPS, NOMEX, PTFE (polytetrafluoroethylene), etc.) may be used as the material of the filtration film 110 . Here, the wrinkle shape of the filtration film 110 can be formed using a wrinkle processing machine or the like well known in the art.

Fig. 2 is a cross-sectional view taken along the line A-A in Fig. 1, showing a structure in which a support reinforcing portion is formed only on a part of the inner end of the wrinkled inner bent portion.

2, the filter for a dust collector according to the present invention is characterized in that a filtration membrane 110 having a corrugated shape is formed with an inner bent portion 111 in contact with the retainer 120, And the outer bent portion 117 is formed on the outer circumferential surface 110.

The inside bending portion 111 and the outside bending portion 117 can be defined as an inside folded portion and an outside folded portion. At this time, a part of the leading end of the inside folded portion 111 (the melted portion) And a pair of rollers constituted by left and right fluid rollers) can be formed in the support reinforcement portion 111a.

Here, the support reinforcing portion 111a is, for example, The supporting reinforcement portion 111a may be disposed inside the filter membrane when the filter bag is assembled to the filter for the dust collector. Which is in contact with the retainer.

As an example, when the surface layer of the base material is melted (for example, in the case of PE, 80%) by the hot air blowing a part of the tip of the inner side of the wrinkled inner bent portion 111 through a hot air nozzle (Such as a pair of rollers constituted by a fixing roller and a pair of left and right fluid rollers) and starts to soften at a temperature of more than 140 degrees and melts so as to have a viscosity in a rubber form at a temperature of 140 degrees or more , And the support reinforcing portion 111a can be defined as a weld support portion in the form of a melt press. Here, the hot air blown through the hot air nozzle may have a temperature range of, for example, 140 to 300 degrees.

As another example, after an adhesive is injected (applied) onto a part (inner partial area) at the inner side of the inner folded portion 111 of the corrugated shape, a roller pair (e.g., a pair of rollers constituted by a fixed roller and left- The support reinforcing portion 111a can be defined as an adhesive support in the form of an adhesive press. Here, the adhesive may be any one of a hot melt adhesive, an acrylate adhesive, a urethane adhesive, an epoxy adhesive, a polyurethane adhesive (PUR), or a silicone adhesive as a heat curable adhesive or a UV curable adhesive.

Next, a series of processes for fabricating a filter bag applicable to the dust filter of the present invention having the above-described structure will be described in detail.

3 is a flowchart illustrating a main process of fabricating a filter bag applied to a filter for a dust collector according to an embodiment of the present invention.

Referring to FIG. 3, a wrinkle folding process of a fabric using, for example, a wrinkle processing machine is carried out so that a filtration film is formed into a wrinkle shape in which an inner bent portion and an outer bent portion are alternately formed (Step 302).

Thereafter, when the filter bag fabricating equipment is operated after setting the filter fabric (pleated fabric) having a wrinkle shape on the inlet of the filter bag manufacturing equipment of the conveyor belt type, the filter fabric is transferred to the melting device side according to the operation of the conveyor belt (Step 304).

For example, as shown in Figs. 5A to 5C, the melting apparatus includes a plurality of line-shaped fixing members 504 for fixing the lower portion of the wrinkles, and a function for aligning and aligning the wrinkle fabrics A plurality of hot air nozzles 508 corresponding in number to the number of the line-shaped fixing members 504 can be mounted on each of the corresponding line-shaped fixing members 504, 506a and 506b, And includes a fixing roller 510a for providing a function of pressing a part of the tip end of the inner bent portion of the filtration membrane cloth 502 (the front end portion of the base material layer is melted) (510b) can be mounted on the rear end portion of the melting apparatus.

FIG. 5A is an exemplary photograph of a melting apparatus for melting a tip portion of an inner bent portion according to the present invention, FIG. 5B is an exemplary photograph for explaining a principle in which a pair of conveying rollers aligns a fabric toward the melting apparatus side according to the present invention And FIG. 5C is an exemplary view showing a structure in which the fixing roller and the left and right flow rollers are mounted on the rear end of the melting apparatus according to the present invention, and FIG. 5D is a view showing a state in which the fixing roller and the left- And is a schematic diagram for explaining the principle of pressing the tip portion.

Therefore, hot air blown from the hot air nozzle 508 is transferred to the inside of the tip end portion 512 of the inner bent portion of the filtration membrane cloth 502 that is fed through the conveyor belt and flows into the melting apparatus side, Is instantaneously melted (softened) (step 306).

Here, the material for the filtration membrane may be a nonwoven fabric material made of a thermoplastic resin such as a polymer material such as PE, PP, PPS, NOMEX, PTFE (polytetrafluoroethylene), and the like through the hot air nozzle 508, The hot air blown to the tip portion 512 may have a temperature range of, for example, 140 degrees to 290 degrees.

As an example, assuming that PE is used as a fabric for a filter membrane, the base material layer inside the tip portion 512 starts to soften at a temperature of 80 degrees or more and then softens gradually. When the temperature condition is 140 degrees or more, Of the melt.

When the raw fabric for the filtration membrane is advanced to the side of the compression device in a state where the inner surface layer of the tip portion of the inside bent portion is molten, as an example, a pair of rollers of the compression device as shown in Fig. 5D, for example, The front end portion 512 of the base material layer is pressed by the pair of rollers made up of the fixing roller 510a and the left and right flow rollers 510b to form a welded support portion in the form of a melt- And deformed into a support portion.

5D, the fixing roller 510a and the left and right flow rollers 510b may be mounted (attached) to the pressing device 510. The fixing roller 510a and the left and right flow rollers 510b , A function of welding a part of the front end of the base material layer which is melted by hot air (for example, pressing with a force in the range of 50 to 100 kg), as well as a function of forwarding the fabric for filtration membrane for continuous melting and pressing operations Functions (roles) can also be performed.

At this time, it is preferable that the left and right fluid rollers 510b provided in the squeezing device are structured so as to be movable in accordance with the kind, thickness, number of corrugations, etc. of the corrugated fabric.

Thereafter, the melt-wrinkling operation is repeatedly performed a necessary number of times to form a welded support portion in the form of a melt-pressed state at the tip end portions of all inner bent portions of the filter membrane fabric (Step 310).

Therefore, the filter for a dust collector to which the filter bag manufactured according to the present embodiment is applied is formed by forming a welded support portion in the form of a melt-compression by applying a process of melt-pressing a tip portion of the inner bent portion of the filtration membrane, It is possible to effectively prevent premature damage of the inner bent portion due to frequent contact with the retainer inserted in the inside of the filtration membrane when the dust is removed.

Thereafter, a cutting process is performed in which a front end portion of the inner bent portion is melted and compressed to cut the fabric for a filtration membrane (a wrinkled fabric) having a welded support portion in the form of a melt-pressed type to an appropriate size (for example, a quantity of 20 to 50 wrinkles) (Step 312).

On the other hand, in the melting apparatus of the present embodiment, four line-shaped fixing members and corresponding four hot air nozzles are provided. However, this is merely an example for improving convenience and understanding of the description, It is needless to say that it is also possible to mount tens to hundreds of line-shaped fixing members and hot air nozzle pairs in the melting apparatus depending on needs or uses.

4 is a flowchart illustrating a main process of fabricating a filter bag applied to a filter for a dust collector according to another embodiment of the present invention.

Referring to FIG. 4, the wrinkle folding process of the fabric using, for example, a wrinkle processing machine is performed to fabricate a filtration membrane having a wrinkle shape in which the inner bending portion and the outer bending portion are alternately formed (Step 402).

Thereafter, when the filter bag fabrication equipment is operated after setting the filter fabric (pleated fabric) having a wrinkle shape on the inlet of the filter bag manufacturing equipment of the conveyor belt type, the fabric for the filter membrane is moved toward the adhesive injection device (Step 404).

6A and 6B, the adhesive injection device includes a pleated material supporting table 604 to which the fabric 602 for the filtration membrane is closely attached, and a fabric 602 for the filtration membrane are provided on the pleated fabric supporting table 604 A pushing wire 606 functioning to press against the crest between the adjacent mountain and the mountain and an adhesive injector 608 functioning to inject the adhesive into the inner tip of the inner bent portion, have.

That is, an adhesive which is ejected (discharged) from the adhesive injector 608, that is, a thermosetting adhesive or a UV curing adhesive agent, is applied to the inner side of a tip end portion of the inner bent portion of the filtration film 602 that is fed through the conveyor belt and flows into the adhesive injection device side (Step 406). As the thermosetting adhesive or the UV curing adhesive, any one of hot-melt, acrylate, epoxy, PUR (polyurethane) or silicon adhesives may be used.

Then, when the fabric for filtration membrane advances to the side of the compression device in a state where the adhesive is injected into the inside of a part of the front end of the inside bent portion, a part of the front end is pressed by a pair of rollers of the compression device, (Step 408), and an adhesive support portion in the form of an adhesive pressure contact is formed (a portion of the tip is deformed into an adhesive support portion).

7A and 7B, a fixing roller 704a and a left and right fluid roller 704b may be provided, and the fixing roller 704a and the left and right fluid rollers 704b may be fixed to the fixing roller 704a, The fabric for the filter membrane is moved forward (not shown) for the continuous injection of the adhesive and the pressing operation as well as the function of adhering a part of the tip into which the adhesive (thermosetting adhesive or UV curing adhesive) is injected It is also possible to perform a function (role) for forwarding. In FIGS. 7A and 7B, reference numeral 702 denotes a fabric for a filtration membrane, and reference numeral 706 denotes an adhesive support in the form of an adhesive press.

FIG. 7A is a schematic view of a compression bonding apparatus for pressing a tip portion of an inner bent portion into which an adhesive is injected according to the present invention, FIG. 7B is a schematic view showing a state in which a tip portion of an inner bent portion, Fig. 7 is an exemplary sectional view showing a modified structure. Fig.

At this time, it is preferable that the left and right fluid rollers 704b provided in the squeezing device are structured so as to be able to move fluidly according to the type, thickness, number of corrugations, etc. of the corrugated fabric.

Therefore, in the filter for a dust collector to which the filter bag manufactured according to the present embodiment is applied, a process of applying an adhesive agent to a part of the tip of the inner bent portion of the filtration membrane and then pressing it is applied to form an adhesive- It is possible to effectively suppress the premature damage of the inner bent portion due to the frequent contact with the retainer inserted in the inside of the filtration membrane at the time of dust removal.

When the distal end portion of the inner bent portion is adhered by the adhesive injected to the inner side and the fabric for the filtration film advances toward the curing device (not shown), the curing device advances the curing process for curing the adhesive in the curing device 410).

That is, as an example, the curing process is performed for several minutes to several hours to cure the adhesive, thereby fixing the adhesive portion of the fabric for the filtration membrane so as not to spread. Here, the curing time may be set differently depending on the kind of the adhesive, the curing property, and the like.

Thereafter, an adhesive bonding operation using an adhesive agent is repeatedly performed a required number of times, thereby forming an adhesive bonding type adhesive bonding portion on the front end portion of all inner bent portions of the filter membrane fabric (Step 412).

Then, an adhesive agent is injected into a part of the tip end of the inner bent portion and is then compressed, and the fabric for a filtration membrane (a wrinkle fabric) in which an adhesive support portion in the form of an adhesive bonding is formed is trimmed to an appropriate size (for example, 20 to 50 wrinkles or the like) A cutting process may be performed (step 414).

In the meantime, only one adhesive injector is shown as an example in the adhesive injector of the present embodiment. However, the present invention is not limited thereto, It is needless to say that hundreds of adhesive injectors can be mounted (mounted) on the adhesive injector.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims. It is easy to see that this is possible. That is, the embodiments disclosed in the present invention are not intended to limit the scope of the present invention but to limit the scope of the present invention.

Therefore, the scope of protection of the present invention should be construed in accordance with the following claims, and all technical ideas within the scope of equivalents should be interpreted as being included in the scope of the present invention.

Claims (17)

A wrinkled filtration membrane formed in such a manner that an inner bent portion and an outer bent portion are alternately formed,
A support reinforcing portion formed as a pressed region formed by pressing a tip portion of the inner bent portion,
A retainer disposed inside the filtration membrane in contact with the support reinforcement,
.
The method according to claim 1,
The support reinforcing portion,
A part of the tip end portion is welded by hot air to melt the surface layer of the base material,
Filters for dust collectors.
The method according to claim 1,
The support reinforcing portion,
And an adhesive support member in the form of an adhesive pressure contact formed by being pressed by a pair of rollers after an adhesive is injected into a part of the tip end
Filters for dust collectors.
The method of claim 3,
Preferably,
And is automatically injected into a part of the tip through an adhesive injector
Filters for dust collectors.
5. The method of claim 4,
Preferably,
Thermosetting adhesive or UV curing adhesive
Filters for dust collectors.
6. The method of claim 5,
The thermosetting adhesive or UV-
Hot melt, acrylate, epoxy, PUR (polyurethane), or silicone adhesives.
Filters for dust collectors.
Forming a filtration film in a wrinkled shape in which an inner bent portion and an outer bent portion are alternately formed,
A step of melting and pressing a part of the tip of the inner side of the inner bent portion to form a welding support portion in the form of a melt-
Wherein the dust collecting filter bag is made of a synthetic resin.
8. The method of claim 7,
The tip portion
The surface layer of the base material is melted by the hot air blown from the hot air nozzle
Method for fabricating filter bag for dust collector.
8. The method of claim 7,
The part of the tip, which is melted,
Is pressed by a pair of rollers composed of a fixed roller and a left and right floating roller
Method for fabricating filter bag for dust collector.
10. The method of claim 9,
Wherein the wrinkled-
Conveyed to the pair of rollers in a conveyor belt manner
Method for fabricating filter bag for dust collector.
Forming a filtration film in a wrinkled shape in which an inner bent portion and an outer bent portion are alternately formed,
Injecting an adhesive into a part of the tip end of the inside bent portion;
And pressing a part of the tip of the inner bent portion into which the adhesive is injected to form an adhesive supporting type adhesive bonding step
Wherein the dust collecting filter bag is made of a synthetic resin.
12. The method of claim 11,
In the manufacturing method,
Curing the adhesive support to a predetermined temperature condition
Wherein the dust collecting filter bag further comprises:
12. The method of claim 11,
Preferably,
The rib between the adjacent mountains and the mountains in the wrinkles is held in such a manner as to be pressed by the pressing wire so that the fabric for the filtration membrane is brought into close contact with the wrinkled cloth receiving table
Method for fabricating filter bag for dust collector.
12. The method of claim 11,
Preferably,
Thermosetting adhesive or UV curing adhesive
Filters for dust collectors.
15. The method of claim 14,
The thermosetting adhesive or UV-
Hot melt, acrylate, epoxy, PUR (polyurethane), or silicone adhesives.
Filters for dust collectors.
12. The method of claim 11,
Wherein the step of forming the adhesive support comprises:
A part of the tip is adhered using a pair of rollers composed of a fixing roller and a left and right flow rollers
Method for fabricating filter bag for dust collector.
17. The method of claim 16,
Wherein the wrinkled-
Conveyed to the pair of rollers in a conveyor belt manner
Method for fabricating filter bag for dust collector.

Images