KR20230152363A - Filter manufacturing device for inflator - Google Patents

Abstract

An apparatus for manufacturing a filter for an inflator according to an embodiment of the present invention includes a mesh sheet unit in which a mesh roll in which metal wires are woven in a grid pattern is cut in the weft direction to form a mesh sheet; a transfer unit driven to sequentially transfer the mesh sheets; a shape rolling unit in which a locking groove is formed so that the mesh sheet is transferred and placed on a rolling bar, and the mesh sheet is wound by rotation of the rolling bar to form a first mesh filter; It is equipped with a lower roll part installed so that the first mesh filter is transported and seated between a pair of roll bars, and an upper roll part where the roll bar is spaced apart and moves up and down on the upper part of the lower roll part, and is in close contact with the outer peripheral surface of the first mesh filter. A dimension rolling unit that is rotated and driven to form a second mesh filter; and a molding unit that presses the second mesh filter in the longitudinal direction by a molding machine to form an inflator filter, wherein the mesh sheet formed to an arbitrary size in the shape rolling unit is rolled in the inner peripheral surface direction by the shape rolling unit. It is characterized by uniformly adjusting the inner and outer diameters to the set dimensions by pressing.

Description

Filter manufacturing device for inflator}

This relates to a manufacturing device for an inflator filter that reduces high temperature, pressure, and air flow characteristics while removing dust from the gas generated by burning the gas generator inside the inflator to inflate the airbag during a car crash.

The automobile airbag system is a device to protect passengers in the event of a vehicle collision and consists of a collision detection sensor, an airbag, and an inflator to inflate the bag. In the airbag system, when a car crashes, a sensor detects an external impact, and the electronic control device determines it to be a valid signal and applies an ignition signal to the inflator. The gas generator in the inflator ignites, and the high-temperature, high-pressure gas generated at this time instantly whitens. It is inflated to protect the occupants by providing a cushioning effect by hitting the bag instead of directly impacting the vehicle's steering wheel or windshield.

The inflator expands the bag by raising the temperature of the gas generator (gunpowder, gas generator or compressed gas) filled inside to over 1200°C and the pressure to over 200kPa. At this time, the inflator filter is used to reduce the high temperature and high pressure of the gas generated by the operation of the inflator. Filters for inflators are typically manufactured by compressing a metal mesh tube into a certain shape or by forming fine holes in the metal tube.

First, when manufacturing by forming fine holes in a metal pipe, rows of teeth or bits on a punch are used to create perforations in the sheet. Related to this, Republic of Korea Patent Publication No. 10-1202935 discloses a flattened mesh metal sheet of variable pitch, a manufacturing method thereof, a filter made of the network metal sheet, and a manufacturing method of the filter. The mesh metal sheet has burrs formed in the perforated portion by perforating, and is equipped to perform a flattening operation to solve the problem of increased friction area caused by the burrs and inability to slide during rolling.

However, if the inflator filter manufactured with fine perforations is not formed uniformly while rolling or is rolled while overlapping with the non-perforated surface, a problem arises in which high temperature and high pressure cannot be controlled when the inflator operates. In addition, the filter for the inflator is welded and fixed, so it takes a long time to work, and the manufacturing process is complicated, which not only lowers work efficiency but also increases the product price due to low production volume.

In contrast, when manufacturing a metal mesh tube by compressing it into a certain shape, a mesh filter rolled into a cylindrical shape is compressed to complete a filter for an inflator in the form of a compressed tube. In this way, the filter for an inflator has the advantage of being excellent in controlling high temperature and high pressure when the inflator operates due to the pipe itself being made of mesh, and the uniform mesh. In addition, filters for inflators can be manufactured quickly through the compression manufacturing process, resulting in high production volumes, which can lower product prices and increase product competitiveness.

However, filters for inflators are provided by rolling a metal mesh sheet in a single process before the molding process. As a result, the metal mesh pipe is not provided with the correct size for the compression manufacturing process, so the product is not formed into a consistent shape even after molding. In addition, the dimensions of the inflator filter were different in some sections or were not uniform, which frequently resulted in problems that prevented it from being used in actual products.

In addition, when the inflator filter was molded, defects often occurred because the metal wires that make up the mesh tube were damaged or protruded due to external pressure. In addition, the filter for the inflator was manufactured by inserting the metal mesh sheet into a cylindrical shape and rolling it into a rolling machine. As a result, the filter was not rolled into the correct position based on the central axis, causing deformation.

Republic of Korea Patent Publication No. 10-1280317 Republic of Korea Patent Publication No. 10-1202935

The present invention was developed to solve the above-mentioned problems. In order to provide a mesh filter rolled to an accurate size as a forming unit, the mesh filter is initially rolled to an arbitrary size in a shape rolling unit, and then the size is changed. The purpose is to ensure that the inner and outer diameters are adjusted to the dimensions set secondarily in the rolling unit, so that the mesh filter can be supplied to the molding unit with uniform specifications and manufactured as an inflator filter with uniform shape and dimensions. It is not limited to the technical challenges described above, and other technical challenges may be derived from the description below.

A mesh sheet unit in which a mesh roll made of metal wires woven in a grid pattern is cut in the weft direction to form a mesh sheet; a transfer unit driven to sequentially transfer the mesh sheets; a shape rolling unit in which a locking groove is formed so that the mesh sheet is transferred and placed on a rolling bar, and the mesh sheet is wound by rotation of the rolling bar to form a first mesh filter; It is equipped with a lower roll part installed so that the first mesh filter is transported and seated between a pair of roll bars, and an upper roll part where the roll bar is spaced apart and moves up and down on the upper part of the lower roll part, and is in close contact with the outer peripheral surface of the first mesh filter. a dimension rolling unit that is rotated and driven to form a second mesh filter; and a molding unit that presses the second mesh filter in the longitudinal direction by a molding machine to form an inflator filter, wherein the mesh sheet formed to an arbitrary size in the shape rolling unit is rolled in the inner peripheral surface direction by the shape rolling unit. It is characterized by uniformly adjusting the inner and outer diameters to the set dimensions by pressing.

In addition, the shape rolling unit further includes a guide portion disposed on the transfer unit and formed to transfer the mesh sheet at a downward angle, wherein a locking groove of the rolling bar is formed in the longitudinal direction on one side of the rolling bar. It is arranged to be spaced apart in the direction of the inclination angle of the guide part, and the mesh sheet is formed to be inserted in a slide position while moving to the front end of the guide part.

In addition, there is a fixed frame spaced apart from the upper part of the transfer unit and fixed to the ground, an upper and lower die that is symmetrical and spaced on both sides of the transfer unit and driven up and down, and a pin-shaped removal pin at the bottom of the upper die. It is provided, and the removal pins are driven to remove the weft threads disposed at both ends of the mesh sheet; further comprising: removing the metal wire so that the metal wire does not protrude as the mesh sheet is wound on the shape rolling unit. It is characterized by

In addition, the weft removal unit includes a support bar made of a square flat plate and fixed perpendicularly in the direction of the transfer unit to the upper surface of the fixing frame; and a seating protrusion formed in a stepped shape on the inner surface of the lower die. It further includes that both ends of the mesh sheet are seated on the seating protrusions and the center is supported by the support bar, allowing the weft yarn to be removed in a stable position.

In addition, there is a dimension measurement unit that receives the inflator filter from the molding unit and first checks the dimensional values of the length, outer diameter, and inner diameter, and the inflator filter measured by the dimension measurement unit is directly inserted into the actual inspection machine. It is characterized in that it further includes an inspection unit equipped with an actual measurement unit that secondarily verifies the actual object.

The apparatus for manufacturing an inflator filter according to an embodiment of the present invention having the above configuration has the following advantages.

By separating the manufacturing process so that the mesh sheet woven with metal wire is first rolled to an arbitrary size and then the inner and outer diameters are secondarily adjusted to the set dimensions, the mesh filter can be supplied to the forming unit in uniform specifications. In addition, the filter for the inflator manufactured in the molding unit is molded to have a uniform shape and dimension, thereby improving product quality, and the high temperature and high pressure of the gas body can be constantly adjusted to always obtain optimal results.

In addition, the rolling bar of the shape rolling unit is arranged in the transport direction of the mesh sheet, and a locking groove is formed at the transport angle of the mesh sheet, so that the mesh sheet is inserted into the locking groove in the transport posture and is rolled in the correct position based on the central axis of the cylindrical shape. A mesh filter can be provided. In addition, since mesh sheets can be automatically manufactured into mesh filters, product production can be increased and mesh filters of the same quality can be obtained.

In addition, the weft threads placed at both ends of the mesh sheet are removed in the weft removal unit to prevent the metal wires from protruding as the mesh sheet is rolled or formed, thereby lowering the production rate of defective products and improving product quality by forming a mesh filter. You can. In addition, the shape rolling unit, dimension rolling unit, and forming unit can be prevented from being damaged or twisted by the protruding metal wire of the mesh filter, thereby extending the parts replacement cycle.

In addition, when the weft removal unit removes the weft threads of the mesh sheet, the center of the mesh sheet is supported by the support bar and both ends of the mesh sheet are placed on the seating protrusions, so that the mesh sheet can be fixed so as not to shake. The weft threads placed at both ends can be accurately removed one by one in a stable position by the removal pins.

In addition, after the size of the inflator filter molded as an actual product is first confirmed by the dimension measurement unit, it is secondarily inserted into the physical inspection machine by the physical measurement unit to recheck whether it can be applied to the actual product, thereby increasing the inspection accuracy of the product and providing excellent results. It can be maintained and managed to continuously produce quality products. In addition, the dimensions of the inflator filter are the same for all sections and are formed uniformly, which has the advantage of eliminating the possibility of failure, such as when it is not used in actual products.

In addition, filters for inflators can be manufactured quickly through a compression manufacturing process, resulting in high production volumes, which can lower product prices, thereby increasing product competitiveness. By ensuring that the shape of inflator filters is uniform, products of the same quality can be continuously provided. can do.

1 is an overall configuration diagram of an inflator filter manufacturing apparatus according to an embodiment of the present invention.
Figure 2 is a diagram showing the molding process of a mesh sheet using an inflator filter manufacturing apparatus according to an embodiment of the present invention.
Figure 3 is a configuration diagram of the mesh sheet unit of the inflator filter manufacturing apparatus according to an embodiment of the present invention.
Figure 4 is a perspective view of the weft removal unit of the inflator filter manufacturing apparatus according to an embodiment of the present invention.
Figure 5 is a perspective view of the shaped rollet unit of the inflator filter manufacturing apparatus according to an embodiment of the present invention.
Figure 6 is a cross-sectional view of the rolling bar of the shaped rollet unit in the apparatus for manufacturing a filter for an inflator according to an embodiment of the present invention.
Figure 7 is a perspective view of the dimension rolling unit in the apparatus for manufacturing a filter for an inflator according to an embodiment of the present invention.
Figure 8 is a perspective view of a molding unit in a filter manufacturing apparatus for an inflator according to an embodiment of the present invention.
Figure 9 is a configuration diagram of an inspection unit in an inflator filter manufacturing apparatus according to an embodiment of the present invention.

Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. The present invention may be implemented in many different forms and is not limited to the structure or method described herein.

In the embodiment of the present invention, unlike the conventional inflator filter manufacturing device in which the rolled mesh filter is immediately formed without adjusting the size, the mesh filter is rolled to an arbitrary dimension in the shape rolling unit and then the inner and outer diameters are adjusted to the exact size in the dimension rolling unit. This relates to an inflator filter manufacturing device that manufactures an inflator filter with uniform shape and dimensions by supplying it to a molding unit. Hereinafter, it will be simply referred to as a “filter manufacturing device.”

In addition, with respect to the up-down, left-right, and left-right directions of the filter manufacturing device of this embodiment, the left direction is defined as 'forward', the right direction is defined as 'backward', and the ground direction is defined as 'downward' based on the transport direction of the mesh sheet shown in Figure 3. Direction' and the opposite direction are defined as 'upward', and the front side of the drawing is referred to as 'one end' and the back side is referred to as 'the other end' to describe an embodiment of the present invention. This is for the purpose of explaining the present invention so that it can be clearly understood, and of course, each direction may be defined differently depending on where the standard is set.

Figure 1 is an overall configuration diagram of an inflator filter manufacturing device according to an embodiment of the present invention, and Figure 2 is a diagram showing the molding process of a mesh sheet using an inflator filter manufacturing device according to an embodiment of the present invention. Referring to Figures 1 and 2, the filter manufacturing device of the present invention is a device for manufacturing a filter that disperses gas and regulates high temperature and high pressure in an inflator used to inflate an airbag in the event of a car accident. This filter manufacturing device is designed to perform rolling and size adjustment operations separately, so that the dimensions of the inflator filter can be accurately adjusted.

In detail, the filter manufacturing device can first roll the mesh sheet to an arbitrary size to produce the mesh sheet to a certain standard, and then secondly adjust the inner and outer diameter dimensions of the mesh filter uniformly to improve dimensional accuracy and improve the production quality of the product. can increase. The filter manufacturing device 10 includes a mesh sheet unit 100, a transfer unit 200, a weft removal unit 300, a shape rolling unit 400, a dimension rolling unit 500, a forming unit 600, and an inspection unit ( 700). The filter manufacturing device with this configuration moves the mesh sheets in the order of each configuration and sequentially molds them into an inflator filter as shown in FIG. 2, thereby minimizing movement lines and enabling automated mass production. .

Figure 3 is a configuration diagram of the mesh sheet unit of the inflator filter manufacturing apparatus according to an embodiment of the present invention. Referring to Figure 3, the mesh sheet unit 100 is a means for forming a mesh sheet by cutting a mesh roll woven with metal wire into unit sizes. In detail, the mesh sheet unit 100 includes a pulling machine 110 that unwinds the wound mesh roll, a leveler 120 that spreads the curved mesh roll flat, and a cutter 130 that cuts the mesh roll to the size of a mesh sheet. ) may include. At this time, the mesh sheet unit 100 is arranged in the order of the pulling machine 110, the leveler 120, and the cutter 130, and one end of the mesh roll is unwound and passes through the leveler 120 to the cutter 130. ) is installed so that it can be transported and supplied.

The pulling machine 110 is provided in a wound state with a mesh roll in which a long sheet is connected, and is equipped so that it can be unwound to one side. In detail, the pulling machine 110 is equipped with a mesh roll in which metal wires of weft and warp threads are woven and wound in a grid pattern, and one end of the mesh roll is pulled toward the leveler 120 and unwound to one side. At this time, the pulling machine 110 may have a plurality of horizontal roll bars erected in front of the mesh roll, and one end of the mesh roll can be pulled to one side of the horizontal roll bar by the horizontal roll bar to prevent it from being stretched tightly. .

The leveler 120 is configured to flatten the curved portion as the mesh roll is unwound. In detail, the leveler 120 includes a lower roll part 121 that transports the mesh roll while unfolding, and an upper roll part 122 that contacts the upper surface of the unfolded mesh roll and presses it flat. In the lower roll unit 121, a plurality of roll bars 121a are installed adjacent to each other in the longitudinal direction of the mesh roll, and the mesh roll is unrolled and placed on the upper surface. The upper roll part 122 is disposed to be spaced apart from the upper part of the lower roll part 121, and a plurality of roll bars 122a are installed adjacent to each other in the longitudinal direction of the mesh roll and driven up and down. In particular, it is preferable that the lower roll part 121 and the upper roll part 122 are arranged with a plurality of roll bars offset, and are spread out flat toward the cutter 130 by rotation of the roll bar while in contact with the lower and upper surfaces of the mesh roll. It is equipped to be transported to.

The cutter 130 is configured to cut the mesh roll into mesh sheets of unit size and supply them. In detail, the cutter 130 consists of an upper body and a lower body, including a main body 131 that stands on the ground, a vision recognition part 132 that recognizes the direction of the weave pattern of the mesh roll, a cutting part 133 that cuts the mesh roll, and It may include a slide unit 134 that supplies the cut mesh sheet to the transfer unit 200. The main body 131 is made up of an upper body and a lower body, stands on the ground, and is equipped so that the upper body can be driven up and down. The vision recognition unit 132 is disposed on the upper part of the main body 131 and recognizes the direction of the weave pattern by photographing the weave pattern of the mesh roll transported from the lower part of the main body 131.

And the cutting unit 133 is disposed on the lower surface of the upper body, and is equipped to change the direction of the cutting blade 133a according to the direction of the weave pattern recognized by the vision recognition unit 132. That is, the cutting part 133 cuts by adjusting the angle of the cutting blade 133a so that it is parallel to the weft direction of the mesh roll. At this time, the cutting unit 133 can continuously cut the mesh roll at set intervals to produce a mesh sheet (A) of unit size. The slide part 134 is disposed at the front end of the lower body and is inclined downward to slide and move the mesh sheet A cut at the cutting part 133 to the transfer unit 200, which will be described later. The cutter 130 configured as described above can prevent deformation from being rolled at an angle in the shape rolling unit 400 by cutting both ends of the mesh sheet A in the correct direction. In addition, the cutter 130 can reduce the defect occurrence rate of the product by cutting the mesh sheet A at an angle to prevent the metal wire from protruding outward and mass-producing defective products.

Referring again to Figures 1 and 2, the transfer unit 200 is configured such that the mesh sheet (A) is divided into a mesh sheet unit 100, a weft removal unit 300, a shape rolling unit 400, a dimension rolling unit 500, and a forming unit. It is a means to ensure that units 600 are transferred in order. This transfer unit 200 is connected in a conveyor belt type and includes a belt transfer unit that transfers the mesh sheet (A), an electromagnet unit that generates magnetic force to adsorb and transfer the mesh sheet (A), and a mesh filter using lift tongs. It may include a lift unit that holds and transfers to the lift. The transfer unit 200 with this configuration is equipped so that the transfer means can be changed according to the shape during the process of manufacturing the inflator filter (D), and can be manufactured automatically, saving labor costs by eliminating the need for workers. It can be produced 24 hours a day, maximizing production.

The belt transfer unit is connected in a conveyor belt structure from the mesh sheet unit 100 through the shape rolling unit 400 to the weft removal unit 300, and is equipped to transport the mesh sheet (A) supplied from the mesh sheet unit 100. Lose. The electromagnet unit is equipped so that the mesh sheet (A) supplied from the weft removal unit 300 is adsorbed to the electromagnet and is transferred from the weft removal unit 300 to the shape rolling unit 400. And in the lift unit, the first and second mesh filters (B, C) and the inflator filter (D) are moved from the shape rolling unit 400 to the dimension rolling unit 500, forming unit 600, and inspection unit 700 by lifting tongs. ) are each equipped to be transported to each other.

Figure 4 is a perspective view of the weft removal unit of the inflator filter manufacturing apparatus according to an embodiment of the present invention. The weft removal unit 300 is a means for removing one weft strand from both ends so that the metal wire does not protrude to the outside when rolling the mesh sheet (A). In detail, the weft removal unit 300 includes a fixed frame 310 installed to be counted on the ground, upper and lower dies 320 and 330 that operate up, down, left and right, and a removal pin 340 that is hung on both ends of the mesh sheet (A) to remove the weft. may include. This weft removal unit 300 removes the wefts arranged at both ends of the mesh sheet (A) and then forms them into the first mesh filter (B), thereby improving production quality by removing elements that cause defects in the product in advance. there is.

The fixed frame 310 is erected on the ground so that it can be spaced apart from the upper part of the transfer unit 200 to provide an installation space of different configurations. This fixed frame 310 is made of a flat plate of a set shape and can be composed of a horizontal plate disposed on the upper part of the transfer unit 200 and a vertical bar that stands perpendicular to the edge of the horizontal plate and has the shape of a circular or square bar. there is. At this time, the vertical bars are preferably installed to deviate from both sides of the transfer unit 200, and are installed at intervals wider than the length of the upper and lower dies 320 and 330 so that the upper and lower dies 320 and 330 can operate without interference.

The upper and lower dies 320 and 330 are configured to operate so that the removal pins 340 are caught on both ends of the mesh sheet (A) and can be removed. In detail, the upper and lower dies 320 and 330 are symmetrically spaced apart on both sides of the transfer unit 200 and are equipped to be driven up and down and back and forth. The upper and lower dies (320, 330) are arranged to be spaced apart from each other up and down, and in the section where the mesh sheet (A) is transported and seated from the mesh sheet unit (100), the upper and lower dies (320, 330) are simultaneously moved inward and driven to come into close contact up and down. . Next, the upper and lower dies 320 and 330 are driven to move outward and spread upward and downward when the removal pin 340 is caught at both ends of the mesh sheet (A). At this time, the upper and lower dies 320 and 330 are operated so that they can be removed from the mesh sheet (A) by opening outward while the metal wire is caught on the removal pin 340, so that they can be easily and quickly removed.

The removal pin 340 is formed in a shape similar to a needle and is inserted into the mesh holes formed at both ends of the mesh sheet (A) to remove the weft threads at both ends by the operation of the upper and lower dies 330. At this time, the removal pins 340 are installed at the lower inner end of the upper die 320, and it is preferable that a plurality of removal pins 340 are arranged in a row in the transport direction of the mesh sheet A. As a result, the plurality of removal pins 340 are simultaneously inserted into the mesh holes of the mesh sheet (A), making it possible to remove one weft strand at a time by the driving operation of the upper and lower dies (320, 330). In addition, the removal pin 340 prevents the shape rolling unit 400, dimension rolling unit 500, and forming unit 600 from being damaged or twisted by the protruding metal wires of the first and second mesh filters (B, C). By preventing this, the parts replacement cycle can be extended.

In addition, the weft removal unit 300 is made of a square flat plate, and has a support bar 311 vertically fixed to the upper surface of the fixing frame 310 in the direction of the transfer unit 200, and a support bar 311 fixed to the inner surface of the lower die 330. It may further include a seating protrusion 331 formed in a stepped shape. In this weft removal unit 300, both ends of the mesh sheet (A) are seated on the seating protrusions 331 by the movement of the upper and lower dies 330 inward, and thereafter, the upper and lower dies 330 are in close contact up and down. As this happens, the lower surface of the support bar 311 comes into contact with the center of the mesh sheet (A). That is, the weft removal unit 300 is fixed so that the mesh sheet (A) is supported in the center by the support bar 311 and both ends are seated on the seating protrusions 331, so that the weft thread is removed by the removal pin 340 in a stable position. ensure that is removed.

Figure 5 is a perspective view of the shaped rollet unit of the inflator filter manufacturing apparatus according to an embodiment of the present invention, and Figure 6 is a cross-sectional view of the rolling bar of the shaped rollet unit in the inflator filter manufacturing apparatus according to an embodiment of the present invention. Referring to Figures 5 and 6, the shape rolling unit 400 is a means for forming the first mesh filter (B) by rolling the mesh sheet (A) to an arbitrary dimension. The shape rolling unit 400 has a locking groove 411 formed so that the mesh sheet A is transferred from the weft removal unit 300 and placed on the rolling bar 410, and the mesh sheet is meshed by rotation of the rolling bar 410. (A) is wound to form the first mesh filter (B).

In detail, the shape rolling unit 400 includes a guide part 420 that guides the mesh sheet A to be supplied to the rolling bar 410, and a rolling bar that is spaced apart and rotated on an extension of the guide part 420 ( 410) and a locking groove 411 disposed in the inclination angle direction of the guide portion 420 into which the mesh sheet (A) is inserted. First, the guide unit 420 is disposed at the end of the transfer unit 200, and may be formed to transfer the mesh sheet A at a downward angle or to be transferred horizontally. At this time, the guide part 420 has guide protrusions formed on both sides of the upper part, which can prevent the mesh sheet A from falling or moving outside.

As shown in FIG. 6, the rolling bar 410 is formed in the shape of a long bar and is placed in the direction of the inclined metal wire of the mesh sheet (A). At this time, the rolling bar 410 has a square-shaped locking groove 411 formed in the longitudinal direction on one side of the central axis and is equipped to open outward. And the rolling bar 410 is arranged so that the arrangement angle of the locking groove 411 matches the inclination angle of the guide part 420, so that the mesh sheet (A) moves to the front end of the guide part 420 and naturally slides. It can be inserted into the locking groove (411). That is, the rolling bar 410 is arranged so that the locking groove 411 is facing the front end of the guide part 420, and the front end of the mesh sheet (A) is rolled away from the guide part 420 and spaced apart on the same line. It is inserted into the locking groove 411 of the bar 410. And the rolling bar 410 is rotated with the front end of the mesh sheet (A) inserted into the locking groove 411 to form the first mesh filter (B).

In detail, the locking groove 411 of the rolling bar 410 is preferably formed to have a width greater than 0.5 to 1 mm than the thickness of the mesh sheet (A). When the locking groove 411 of the rolling bar 410 has a width that exceeds the thickness of the mesh sheet (A) by 1 mm, the mesh sheet (A) is inserted from the guide portion 420 into the locking groove 411 and is externally It deviates or shakes, preventing the mesh sheet (A) from rolling to its correct position. On the other hand, when the locking groove 411 of the rolling bar 410 is formed with a width less than 0.5 mm than the thickness of the mesh sheet (A), the mesh sheet (A) is connected to the locking groove 411 in the guide portion 420. A problem occurs where it cannot be inserted and falls.

Figure 7 is a perspective view of the dimension rolling unit in the apparatus for manufacturing a filter for an inflator according to an embodiment of the present invention. The size rolling unit 500 is a means for forming the second mesh filter (C) by adjusting the inner and outer diameters of the first mesh filter (B) to a set size. In the dimension rolling unit 500, the first mesh filter (B) is transferred from the shape rolling unit 400 and comes into close contact with the outer peripheral surfaces of the lower roll unit 510 and the upper roll unit 520, and the lower roll unit 510 and the upper roll unit ( The inner and outer diameters of the first mesh filter (B) are adjusted by the rotational drive (520) to form the second mesh filter (C).

In detail, the dimension rolling unit 500 includes a lower roll unit 510 on which the first mesh filter (A) is transported and installed to be seated between a pair of roll bars 511, and a roll bar 521 on the upper part of the lower roll unit 510. ) includes an upper roll portion 520 that is spaced apart and moves up and down. This size rolling unit 500 has uniform inner and outer diameters so that the first mesh filter (A) rolled to an arbitrary size in the shape rolling unit 400 can be provided with accurate dimensions before being supplied to the forming unit 600. It plays a role in matching. In addition, the size rolling unit 500 uniformly produces the inner and outer diameters of the second mesh filter (C), thereby enabling the molding unit 600 to mold the inflator filter (D) into a constant shape and dimension, thereby improving product quality. can be improved.

In the lower roll unit 510, a pair of roll bars 511 are arranged adjacent to each other, and a first mesh filter (B) is placed between the pair of roll bars 511. At this time, the first mesh filter (B) is transported by the lift unit of the transfer unit 200 and placed on the upper surface of the lower roll unit 510. After being inserted into the long rod-shaped rotating bar, the first mesh filter (B) is maintained in position to prevent it from shaking left and right. do. In addition, the lower roll unit 510 is arranged to be spaced apart from a pair of roll bars 511 so that it can rotate, and is rotated while in contact with both lower sides of the first mesh filter (B). Here, the lower roll unit 510 rotates simultaneously in one direction while the pair of roll bars 511 are fixed in place, and is provided so that the outer peripheral surface of the first mesh filter B placed on the upper surface engages and rotates.

The upper roll part 520 has a roll bar 521 spaced apart from the upper part of the lower roll part 510 and is capable of moving up and down. At this time, the upper roll part 520 descends toward the first mesh filter (B), and is linked to the rotational drive of the lower roll part 121 while in contact with the upper surface of the first mesh filter (B), so that the roll bar 521 moves. 1It has a structure that rotates together with the mesh filter (B). In addition, the upper roll unit 520 can adjust the inner and outer diameter dimensions of the first mesh filter (B) according to the amount of force pressing the outer circumferential surface while the roll bar 521 is in contact with the outer circumferential surface of the first mesh filter (B). , the second mesh filter (C) can be formed with the set dimensions.

The roll bars 511 and 521 of the lower roll part 510 and the upper roll part 520 may be made of urethane material, and friction with the first mesh filter B can be minimized. Additionally, the roll bars 511 and 521 can prevent the first mesh filter B from being worn by rotating in contact with the first mesh filter B. In addition, the lower roll part 510 and the upper roll part 520 are equipped to have a hardness of HS90 to HS100, and if the hardness falls below HS90, it is difficult to adjust the inner and outer diameter dimensions of the first mesh filter (B) so that it can be replaced. do. Accordingly, the size rolling unit 500 can manufacture the second mesh filter C of the same size by periodically replacing the roll bars 511 and 521.

Figure 8 is a perspective view of a molding unit in a filter manufacturing apparatus for an inflator according to an embodiment of the present invention. Referring to FIG. 8, the molding unit 600 is a means for forming the inflator filter (D) by pressure molding the second mesh filter (C). The forming unit 600 includes a housing inserter that transfers the second mesh filter (C) from the dimension rolling unit 500 and inserts it into the cylindrical housing 601, and a molding machine that presses and forms the second mesh filter (C) on both sides of the housing 601. 610 and a filter extractor for extracting the inflator filter (D) may be included in the housing 601. Here, the housing inserter and filter extractor can be applied in various structures to insert and extract the filter into the housing 601, but are not limited to this.

As shown in FIG. 8, the molding machine 610 includes a fixed die 611 on which the housing 601 is mounted, a driving die 612 that moves up and down, and a fixed block that vertically moves the pressing block 614 horizontally. (613), a pressure block 614 horizontally moved by the fixed block 613, disposed on both sides of the housing 601 to press and mold the second mesh filter (C) according to the horizontal movement of the pressure block 614 It may include a pressure bar 615. The molding machine 610 with this configuration is temporarily stopped while the cylindrical housing 601 is transported in the longitudinal direction by the transfer unit 200, or is lifted to the upper part of the transfer unit 200 by the lifting plate. It is equipped to perform a pressure forming operation.

The fixed die 611 is erected on the ground and arranged symmetrically and spaced apart on both sides of the transfer unit 200. At this time, the fixed die 611 is provided with and seated in a cylindrical housing 601 into which the second mesh filter (C) is inserted, and the upper end of the fixed die 611 is located above the height of the transfer unit 200. It is desirable to be equipped as much as possible. The driving die 612 is arranged to be spaced apart from the upper part of the fixed die 611 and is equipped to be driven up and down. This driving die 612 descends so that the second mesh filter (C) in the housing 601 can be pressed at a constant speed, and is driven to manufacture the inflator filter (D) of a uniform shape.

The fixing blocks 613 are made up of a pair, installed on the lower surface of the driving die 612, and arranged to be spaced apart in the longitudinal direction of the housing 601. At this time, the fixing blocks 613 are installed at intervals wider than the length of the housing 601, and are moved up and down by the operation of the driving die 612. In particular, the pair of fixed blocks 613 are formed in the shape of a square block, and the inner surface is formed as a slide surface 613a inclined downward to the outside, and is in contact with the pressure block 614, which will be described later, and pressurizes the block 614. Move by pushing in the horizontal direction.

The pressure block 614 is made up of a pair, installed on the upper surface of the fixed die 612, and disposed at a position corresponding to the slide surface 613a of the fixed block 613. In addition, the pair of pressure blocks 614 are formed in the shape of a square block, and the outer surface is formed with a sliding surface 614a inclined upward inward so that it can come into contact with the sliding surface 613a of the fixed block 613. It is equipped. Such pressurizing blocks 614 are installed to be spaced apart from both sides of the housing 601, and are preferably installed narrower inward than the installation interval of the fixing blocks 613. That is, as the pressing block 614 moves downward, the slide surface 613a of the fixed block 613 and the sliding surface 614a come into contact, and the slide surface 613a of the fixed block 613 comes into contact with the pressure block 614. The pressure block 614 is moved by pushing the sliding surface 614a of the fixed block 613 horizontally.

The pressure bar 615 is made of a circular bar, is installed on both sides of the housing 601, and is arranged to be spaced apart from the inner surface of the pressure block 614. At this time, the pressure bar 615 is pressed by the horizontal movement of the pressure block 614 and presses the second mesh filter C inserted into the housing 601 on both sides. In addition, both ends of the pressure bar 615 come into contact with the inner surface of the pressure block 614 to form a wide flat pressure surface so that force can be transmitted. In particular, the pressure bar 615 presses the second mesh filter (C) in the housing 601 with the same force from both sides, thereby allowing the inflator filter (D) to be molded into a uniform shape.

In the molding unit 600 configured as described above, the slide surface 613a of the fixed block 613 vertically descends along the slide surface 614a of the pressure block 614 and pushes the pressure block 614 inward to pressurize. The bar 615 can press-mold the second mesh filter (C). In addition, the molding unit 600 can increase product competitiveness by lowering the product price due to high production volume as the inflator filter (D) is quickly processed through the compression manufacturing process, and the shape of the inflator filter (D) is constant. By doing so, we can continuously provide products of the same quality.

Figure 9 is a configuration diagram of an inspection unit in an inflator filter manufacturing apparatus according to an embodiment of the present invention. Referring to FIG. 9, the inspection unit 700 is a means to verify that the inflator filter (D) can be installed in the actual product. This inspection unit 700 includes a weight measurement unit 710 that measures the weight, a dimension measurement unit 720 that measures the length, inner diameter, and outer diameter, and an actual measurement unit 730 that checks the filter by inserting it into the physical inspection machine. can do. The inspection unit 700 including this configuration accurately checks the weight, size, and actual substance of the mesh sheet (A), the first mesh filter (B), the second mesh filter (C), and the inflator filter (D). By enabling products to be produced within the exact margin of error, the defect rate can be lowered.

First, the weight measuring unit 710 is equipped so that the weight of each can be measured after forming the mesh sheet (A), the first mesh filter (B), the second mesh filter (C), and the inflator filter (D). Lose. At this time, if the measured weight satisfies the set weight range, the weight measurement unit 710 transmits it to the dimension measurement unit 720. In contrast, the weight measuring unit 710 transmits the measured weight so that it can be separated separately if it falls outside the set weight range.

The size measuring unit 720 is equipped to measure the dimensional values of the length, outer diameter, and inner diameter after forming the inflator filter (D) in the molding unit 600. That is, the dimension measuring unit 720 may be provided with a length measuring unit 721, an outer diameter measuring unit 722, and an internal diameter measuring unit 723, which are arranged in a row and the inflator filter (D) is transferred to the sensor. Each dimension value is calculated by . And if the measured dimension value satisfies the set range, the dimension measuring unit 720 transmits it to the actual measuring unit 730. If the measured dimension value falls outside the set range, it transmits it so that it can be separated.

The actual measurement unit 730 is equipped to secondarily check the actual object by directly inserting the inflator filter (D) measured by the size measurement unit 720 into the physical inspection machine. At this time, the physical measurement unit 730 makes a final judgment as a normal product if the inflator filter (D) is completely inserted into the physical inspection device without jamming, and makes a final judgment as an abnormal product if the inflator filter (D) is not inserted into the physical inspection device. Delivered separately.

In this way, the inspection unit 700 measures and primarily confirms the dimensional values of the length, outer diameter, and inner diameter of the inflator filter (D) in the dimension measuring unit 720, and then inspects them in the physical measuring unit 730. By inserting it, you can secondarily check the actual item. In other words, the inspection unit 700 verifies the dimensions twice by the dimension measurement unit 720 and the actual measurement unit 730, thereby improving the accuracy of product dimensions and increasing reliability of the product.

The filter manufacturing device of the present invention is a mesh sheet (A) woven with metal wire that is first rolled to an arbitrary size and then secondarily separated into a manufacturing process so that the inner and outer diameters are adjusted to the set dimensions, thereby forming a molding unit with uniform specifications. Mesh sheets (A) can be provided to be supplied. In addition, the inflator filter (D) manufactured in the molding unit 600 is molded to have a uniform shape and dimension, improving product quality, and optimal results can always be obtained by equally controlling the high temperature and high pressure of the gas body. It can be done.

A person skilled in the art will understand that the present invention can be implemented in a modified form without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments should be considered from an illustrative rather than a restrictive perspective. The scope of the present invention is indicated in the claims rather than the foregoing description, and all differences within the equivalent scope should be construed as being included in the present invention.

10: Filter manufacturing device for inflator
A: Mesh sheet B: First mesh filter
C: Second mesh filter D: Filter for inflator
100: mesh sheet unit
110: pulling machine 130: cutting machine
120: Flatter 131: Main body
121: lower roll unit 132: vision recognition unit
121a: roll bar 133: cut portion
122: upper roll part 133a: cutting blade
122a: roll bar 134: slide part
200: transfer unit 300: weft removal unit
310: fixed frame
311: support bar
320: Upper die
330: lower die
331: Seating protrusion
340: Removal pin
400: Shape rolling unit 500: Dimension rolling unit
410: rolling bar 510: lower roll part
411: Locking groove 511: Roll bar
420: Guide part 520: Upper roll part
521: roll bar
600: Forming unit 700: Inspection unit
601: Housing 710: Weight measurement unit
610: Molding machine 720: Dimension measuring unit
611: Fixed die 721: Length measuring unit
612: driving die 722: outer diameter measuring part
613: Fixed block 723: Internal diameter measuring part
613a: slide surface 730: actual measurement unit
614: Pressure block
614a: sliding surface
615: Pressure bar

Claims (5)

A mesh sheet unit in which a mesh roll made of metal wires woven in a grid pattern is cut in the weft direction to form a mesh sheet;
a transfer unit driven to sequentially transfer the mesh sheets;
a shape rolling unit in which a locking groove is formed so that the mesh sheet is transferred and placed on a rolling bar, and the mesh sheet is wound by rotation of the rolling bar to form a first mesh filter;
It is equipped with a lower roll part installed so that the first mesh filter is transported and seated between a pair of roll bars, and an upper roll part where the roll bar is spaced apart and moves up and down on the upper part of the lower roll part, and is in close contact with the outer peripheral surface of the first mesh filter. A dimension rolling unit that is rotated and driven to form a second mesh filter;
It includes a molding unit that presses the second mesh filter in the longitudinal direction by a molding machine to form a filter for an inflator,
A filter manufacturing device for an inflator in which the mesh sheet formed to an arbitrary size in the shape rolling unit is pressed toward the inner circumferential surface by the shape rolling unit to uniformly adjust the inner and outer diameters to the set dimensions. According to paragraph 1,
The shape rolling unit is,
It further includes a guide part disposed on the transfer unit and formed to transfer the mesh sheet at a downward angle,
The locking groove of the rolling bar is formed in the longitudinal direction on one side of the rolling bar and is spaced apart in the direction of the inclination angle of the guide part, so that the mesh sheet is inserted in a slide position while moving to the front end of the guide part. A filter manufacturing device for inflators. According to paragraph 1,
It is provided with a fixed frame spaced apart from the upper part of the transfer unit and fixed to the ground, an upper and lower die that is symmetrical and spaced on both sides of the transfer unit and driven up and down, and a pin-shaped removal pin at the bottom of the upper die. , a weft removal unit in which the removal pins are driven to remove the weft threads disposed at both ends of the mesh sheet,
A filter manufacturing device for an inflator, characterized in that the mesh sheet is wound in the shape rolling unit and the metal wire is removed so as not to protrude. According to paragraph 3,
The weft removal unit,
A support bar made of a square plate and fixed perpendicularly in the direction of the transfer unit to the upper surface of the fixing frame;
It further includes a seating protrusion formed in a stepped shape on the inner surface of the lower die,
A filter manufacturing device for an inflator, characterized in that both ends of the mesh sheet are seated on the seating protrusions and the center is supported by the support bar so that the weft thread is removed in a stable position. According to paragraph 1,
A size measurement unit that receives the inflator filter from the molding unit and measures the dimensional values of the length, outer diameter, and inner diameter to check it firstly, and the inflator filter measured by the size measurement unit is directly inserted into the actual inspection machine to perform a secondary check. A filter manufacturing device for an inflator, characterized in that it further includes an inspection unit equipped with a physical measurement unit that verifies the actual product.