A needle punching device and process for a vacuum insulation panel core material

Abstract

This invention discloses a needle-punching device and process for vacuum insulation panel core material, relating to the field of vacuum insulation panel core material processing technology. It includes: two side supports connected by a bottom beam and a top beam, forming the overall frame of the needle-punching device; and a needle-punching mechanism installed on the lower side of the top beam, comprising a needle plate and needles evenly distributed on the needle plate for needle-punching the vacuum insulation panel core material. Through the arrangement of the needle-punching mechanism, chip removal mechanism, and chip removal drive mechanism, this invention enables the chip removal mechanism to remain non-contact with the needles when the needle-punching mechanism moves downwards, and to maintain contact with the needles when the needle-punching mechanism moves upwards. This removes glass fiber dust and debris adhering to the needle surface, protects the guide plate, ensures the stability of the needles' vertical movement, and thus guarantees the needle-punching quality of the core material.

Description

Technical Field

[0001] This invention relates to the field of vacuum insulation panel core material processing technology, specifically to a needle punching device and process for vacuum insulation panel core material. Background Technology

[0002] Vacuum insulation panels are high-performance panels that utilize the principle of vacuum to achieve highly efficient thermal insulation. Their core structure consists of an internally filled core material (such as fumed silica or glass fiber) and a high-barrier composite film encapsulation. By creating a vacuum, air is expelled from the micropores of the core material, significantly inhibiting gas convection and conduction. Combined with the high-barrier film on the surface to prevent gas infiltration, this results in an extremely low thermal conductivity, achieving an insulation effect 5 to 10 times that of traditional materials. This material boasts advantages such as thinness, light weight, energy efficiency, and environmental friendliness, and is primarily used in refrigerators, cold chain equipment, building insulation, and high-temperature insulation.

[0003] The core material of vacuum insulation panels is often made of glass fiber. The internal fibers of the combed glass fiber are loose, disordered, and primarily distributed in a two-dimensional plane. There is almost no physical entanglement between the fibers; they maintain their shape only through extremely weak electrostatic or surface friction. During subsequent production and packaging, this loose structure can cause the fibers to slip under vibration or external force, leading to localized thinning or voids in the insulation. Furthermore, during vacuum sealing, the strong airflow can suck away the loose fibers or cause the core material structure to settle or collapse under vacuum. Therefore, a needle-punching process is used to hook some of the surface fibers of the glass fiber into a vertical direction, forming fiber clusters that extend through the thickness direction. This strengthens the originally loose two-dimensional structure into a stable three-dimensional network framework, significantly improving the dimensional stability and compressive strength of the core material.

[0004] Currently, traditional needle punching equipment is used for glass fiber needle punching, such as... Figure 1As shown, each needle-punching device is equipped with a guide plate 10, which has guide holes corresponding to the needle positions. These guide holes support and guide the needles during their movement. Since needles are typically long and thin, directly inserting them into the raw material for needle-punching can easily cause them to bend or even break. The guide plate allows the needles to enter the guide holes before entering the raw material, providing support and guidance during movement and reducing the risk of bending or breakage. While the guide plate functions reliably in needle-punching of traditional materials like cotton, linen, and polyester, it is less effective in processing glass fiber. Due to the high hardness of glass fiber, glass fiber dust and debris adhering to the needles after puncture are carried into the guide holes of the guide plate. This glass fiber dust enters the hole walls, acting like polishing paste, grinding the round holes into ovals or trumpet-shaped openings. In the early stages of guide hole wear, this leads to enlarged needle holes in the raw material, affecting the thermal insulation effect of the core material. Later, as the guide holes further enlarge, the needles lose precise guidance during descent, causing bending or breakage and frequent production line shutdowns.

[0005] Therefore, a needle-punching device and process for vacuum insulation panel core material is needed to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a needle-punching device and process for the core material of a vacuum insulation panel, so as to solve the problems existing in the prior art mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A needle-punching device for a vacuum insulation panel core material, comprising: The side supports are provided in two, and a bottom beam and a top beam are connected between the two side supports to form the overall frame of the needle-punching device. A needle-punching mechanism is installed on the lower side of the top beam. The needle-punching mechanism includes a needle plate and needles. The needles are evenly distributed on the needle plate and are used to perform needle-punching processing on the core material of the vacuum insulation panel. A needle-piercing drive mechanism is installed on the upper side of the top beam. The needle-piercing drive mechanism includes a motor and a linear reciprocating drive assembly, which is used to drive the needle plate to move the needle up and down reciprocally. A guide plate is installed between two side supports and located below the needle plate. The guide plate has guide holes corresponding to the positions of the needles on the needle plate, which are used to support and guide the needles during movement. A chip removal mechanism is installed on the lower side of a guide plate. The chip removal mechanism includes a drive box, an upper transverse plate, and a lower transverse plate installed on one side of the guide plate. The upper transverse plate and the lower transverse plate are laterally slidably connected in the drive box. A scraping component for removing chips from the surface of the needle is connected to the upper transverse plate and the lower transverse plate. A chip removal drive mechanism is mounted on the needle punching mechanism and the chip removal mechanism. The chip removal drive mechanism is used to convert the up-and-down reciprocating motion of the needle punching drive mechanism into the lateral reciprocating motion of the scraping component, so that when the needle moves downward, the scraping component disengages from the needle, and when the needle moves upward, the scraping component contacts the needle.

[0008] Preferably, the acupuncture mechanism further includes a guide frame and a needle beam. Several guide frames are provided and symmetrically installed on the front and rear sides of the lower end of the top beam. The needle beam is provided with sliding rods on both sides, and the needle beam is slidably connected to the vertical groove on the guide frame through the sliding rods. The needle plate is fixedly installed at the lower end of the needle beam.

[0009] Preferably, the linear reciprocating drive assembly includes a plurality of bearing seats mounted on the top beam, a drive shaft is rotatably connected to the bearing seats, and an eccentric disk is keyed to the drive shaft; The eccentric disc is rotatably connected to a connecting rod, a connecting seat is installed on the upper end face of the needle beam, and the lower end of the connecting rod is rotatably connected to the connecting seat. A gearbox is mounted on the support of the top beam, the drive shaft is connected to the output end of the gearbox, and the electric motor is mounted on the input end of the gearbox.

[0010] Preferably, the scraping assembly includes a chip removal bracket and a chip removal plate. The chip removal plate slides laterally in a groove on the chip removal bracket. A spring for pushing the chip removal plate outward is also provided in the groove. The chip removal plate is provided with a plurality of chip removal grooves corresponding to the needles. The adjacent chip removal brackets are respectively installed on the upper and lower transverse plates, so that the two chip removal plates arranged in opposite directions form a set of scraping components; the number of scraping components corresponds to the number of rows of needles.

[0011] Preferably, a gear is rotatably connected inside the drive box. The gear is located between the upper transverse plate and the lower transverse plate. An upper rack is installed on the lower end face of the upper transverse plate, and a lower rack is installed on the upper end face of the lower transverse plate. Both the upper rack and the lower rack mesh with the gear.

[0012] Preferably, the chip removal drive mechanism includes a drive plate mounted on the upper transverse plate, a vertical guide block is provided on the side of the drive plate, a rotating guide block is rotatably connected to the lower end of the vertical guide block, and a torsion spring is connected to the rotating shaft of the rotating guide block. An extension shaft is connected to the needle beam, and a drive guide wheel is rotatably connected to one end of the extension shaft. The drive guide wheel is used to roll along the trajectory of the vertical guide block and the rotating guide block, and drive the upper transverse plate and the lower transverse plate to move laterally.

[0013] Preferably, the adjacent scraping components are staggered vertically, and the wear resistance coefficient of the chip removal plate is lower than that of the piercing needle.

[0014] Preferably, the present invention further includes a dust collection mechanism, which is installed on the lower side of the chip removal mechanism for collecting raw material debris scraped off the needle.

[0015] Preferably, the dust collection mechanism includes a dust collection box installed on the lower end face of the drive box. The dust collection box is provided with a plurality of dust collection blocks. The dust collection blocks are semi-circular arc-shaped. The inner wall of the arc of the dust collection block is provided with a plurality of dust collection holes. Two adjacent dust collection blocks can form a complete hollow cylindrical structure. The dust collection box is provided with a pipe interface for connecting to a vacuum cleaner.

[0016] A needle-punching process for the core material of a vacuum insulation panel, characterized by comprising the following steps: S1: The combed glass fiber core material is fed into the needle punching device; S2: An intermittent conveying device is used to convey the glass fiber core material. The intermittent conveying device conveys the material when the needles are separated from the core material and stops conveying when the needles come into contact with the core material. S3: Start the needle punching device. The needle punching drive mechanism drives the needle plate and needle to move up and down reciprocally. The barbs on the needle punch the glass fiber to achieve internal entanglement of the core material raw material, thereby improving the strength of the core material. S4: During the needle punching process, when the needle moves upward, the chip removal plate contacts the surface of the needle to scrape off the glass fiber debris on the surface of the needle. When the needle moves downward, the chip removal plate disengages from the needle. S5: The hollow cylindrical dust collection block formed by the dust collection mechanism collects the removed glass fiber debris, and the intermittent conveying equipment outputs the needled core material to the outside of the needled device to complete the needled processing of the core material.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. The present invention, through the arrangement of a needle punching mechanism, a chip removal mechanism, and a chip removal drive mechanism, enables the chip removal mechanism to remain in a non-contact state with the needle when the needle punching mechanism moves downward, and to maintain contact with the needle when the needle punching mechanism moves upward. This achieves the removal of glass fiber dust and debris adhering to the surface of the needle, protects the guide plate, ensures the stability of the needle's up-and-down movement, and thus guarantees the needle punching quality of the core material.

[0018] 2. Through the coordinated design of the dust collection mechanism and the chip removal mechanism, the present invention can simultaneously drive the dust collection block of the dust collection mechanism to form a cylindrical dust suction structure when the chip removal mechanism removes chips from the needle. By collecting the debris and dust around the needle from all directions, the dust suction effect can be effectively improved, preventing the debris and dust from drifting into the air and affecting the environment, and preventing the debris and dust from falling back into the core material and affecting its thermal insulation performance. Attached Figure Description

[0019] Figure 1 This is a front-view stereoscopic structural diagram of the present invention.

[0020] Figure 2 This is a rear-view stereoscopic structural diagram of the present invention.

[0021] Figure 3 This is a schematic diagram showing the installation positions of the acupuncture mechanism and the acupuncture drive mechanism of the present invention.

[0022] Figure 4 This is a schematic diagram showing the connection between the acupuncture mechanism and the acupuncture drive mechanism of the present invention.

[0023] Figure 5 This is a schematic diagram of the guide plate structure of the present invention.

[0024] Figure 6 This is a schematic diagram showing the installation positions of the chip removal mechanism and the dust collection mechanism of the present invention.

[0025] Figure 7 This is a schematic diagram of the chip removal mechanism of the present invention.

[0026] Figure 8 For the present invention Figure 7 A magnified schematic diagram of the structure at point A in the middle.

[0027] Figure 9 This is a schematic diagram of the scraping component structure of the present invention.

[0028] Figure 10 This is a schematic diagram of the dust collection mechanism of the present invention.

[0029] Figure 11 This is a schematic diagram of the dust collection mechanism of the present invention, in which the dust collection blocks are assembled into a hollow cylindrical shape.

[0030] Figure 12 This is a schematic diagram of the chip removal drive mechanism of the present invention.

[0031] In the diagram: 1. Side support; 2. Bottom beam; 3. Top beam; 4. Needle-piercing mechanism; 41. Guide frame; 42. Needle beam; 43. Needle plate; 44. Needle; 5. Needle-punching drive mechanism; 51. Shaft seat; 52. Drive shaft; 53. Eccentric disc; 54. Connecting rod; 55. Connecting seat; 56. Gearbox; 57. Electric motor; 6. Support plate; 7. Chip removal mechanism; 71. Drive box; 72. Upper transverse plate; 73. Lower transverse plate; 74. Gear; 75. Upper rack; 76. Lower rack; 77. Chip removal bracket; 78. Chip removal plate; 79. Chip removal groove; 8. Chip removal drive mechanism; 81. Drive plate; 82. Vertical guide block; 83. Rotary guide block; 84. Extension shaft; 85. Drive guide wheel; 9. Dust collection mechanism; 91. Dust collection box; 92. Dust collection block; 93. Dust collection hole; 10. Guide plate. Detailed Implementation

[0032] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0033] Please see Figure 1-12 The present invention provides the following technical solutions: A needle-punching device for a vacuum insulation panel core material includes: a side support 1, two side supports 1 are provided, and a bottom beam 2 and a top beam 3 are connected between the two side supports 1 to form the overall frame of the needle-punching device, which is used for the installation of various components of the needle-punching device.

[0034] The needle-punching mechanism 4 is installed on the lower side of the top beam 3. The needle-punching mechanism 4 includes a needle plate 43 and needles 44. The needles 44 are evenly distributed on the needle plate 43 and are used for needle-punching the core material of the vacuum insulation panel. The needle-punching mechanism 4 also includes a guide frame 41 and needle beams 42. Eight guide frames 41 are provided and symmetrically installed on the front and rear sides of the lower end face of the top beam 3. The needle beams 42 have sliding rods on both sides and are slidably connected to the vertical grooves on the guide frames 41 via the sliding rods. The needle plate 43 is fixedly installed on the lower end of the needle beams 42. The needles 44 are detachably installed on the needle plate 43 for easy inspection and replacement.

[0035] The needle-punching drive mechanism 5 is installed on the upper side of the top beam 3. The needle-punching drive mechanism 5 includes a motor 57 and a linear reciprocating drive assembly, which drives the needle plate 43 to move the needle 44 up and down reciprocally. The linear reciprocating drive assembly includes several bearing seats 51 mounted on the top beam 3. A drive shaft 52 is rotatably connected to the bearing seat 51. An eccentric disk 53 is keyed to the drive shaft 52. A connecting rod 54 is rotatably connected to the outside of the eccentric disk 53. A connecting seat 55 is mounted on the upper end face of the needle beam 42. The lower end of the connecting rod 54 is rotatably connected to the connecting seat 55. A gearbox 56 is mounted on the bracket of the top beam 3. The drive shaft 52 is connected to the output end of the gearbox 56. The motor 57 is mounted on the input end of the gearbox 56. By driving the drive shaft 52 to rotate through the motor, the drive shaft 52, through the cooperation of the eccentric disk 53 and the connecting rod 54, drives the needle beam 42 to slide up and down in the guide frame 41, thereby realizing the up and down reciprocating needle-punching motion of the needle 44.

[0036] The guide plate 10 is installed between the two side supports 1 and below the needle plate 43. The guide plate 10 has guide holes corresponding to the positions of the needles 44 on the needle plate 43, which are used to support and guide the needles 44 during movement. Since the needles 44 are usually relatively slender, when the needles 44 are directly inserted into the raw material for needle punching, the needles 44 are prone to bending or even breaking. The guide plate 10 allows the guide plate 10 to enter the guide holes and then into the raw material, thus supporting and guiding the needles 44 during movement and reducing the risk of bending or breaking of the needles 44.

[0037] The chip removal mechanism 7 is installed on the lower side of the guide plate 10. The chip removal mechanism 7 includes a drive box 71, an upper transverse plate 72, and a lower transverse plate 73 installed on one side of the guide plate 10. The upper transverse plate 72 and the lower transverse plate 73 are laterally slidably connected in the drive box 71. Scraping components for chip removal from the surface of the needle 44 are connected to the upper transverse plate 72 and the lower transverse plate 73. The lateral movement of the upper transverse plate 72 and the lower transverse plate 73 can drive the scraping components on them to move synchronously.

[0038] The scraping assembly includes a chip removal bracket 77 and a chip removal plate 78. The chip removal plate 78 slides laterally within a groove on the chip removal bracket 77. A spring is also provided within the groove to push the chip removal plate 78 outward. The chip removal plate 78 has several chip removal grooves 79 corresponding to the needles 44. The chip removal grooves 79 allow the chip removal plate 78 to fit snugly against the side wall of the needles 44. Through the separate sliding design of the chip removal bracket 77 and the chip removal plate 78, even after the chip removal plate 78 is worn, it can still maintain stable contact with the needles 44 under the push of the spring, ensuring the chip removal effect.

[0039] Adjacent chip removal brackets 77 are respectively installed on the upper transverse plate 72 and the lower transverse plate 73, so that the two chip removal plates 78 arranged in opposite directions form a set of scraping components. A set of scraping components can perform complete chip removal on a row of needles 44; the number of scraping components corresponds to the number of rows of needles 44.

[0040] The adjacent scraping components are staggered vertically. This arrangement allows the chip removal plate 78 to continue sliding outwards from the chip removal bracket 77 even when the chip removal groove 79 on the chip removal plate 78 is worn. This avoids the situation where two adjacent chip removal plates 78 are on the same plane and come into contact with each other, preventing the chip removal groove 79 from becoming worn and unable to effectively remove chips. The wear resistance coefficient of the chip removal plate 78 is lower than that of the barbed needle 44. This arrangement aims to reduce the wear of the barbed needle 44 by the chip removal plate 78.

[0041] A gear 74 is rotatably connected inside the drive box 71. The gear 74 is located between the upper transverse plate 72 and the lower transverse plate 73. An upper rack 75 is mounted on the lower end face of the upper transverse plate 72, and a lower rack 76 is mounted on the upper end face of the lower transverse plate 73. Both the upper rack 75 and the lower rack 76 mesh with the gear 74. This structure allows the upper transverse plate 72 and the lower transverse plate 73 to move synchronously in opposite directions, enabling the scraping components on them to move closer to or further away from each other. A spring is installed inside the drive box 71, located between the inner wall of the drive box 71 and the side of the upper transverse plate 72. This spring ensures that the scraping components on the upper transverse plate 72 and the lower transverse plate 73 are initially in a state of separation, i.e., the scraping components are in a non-contact position with the needle 44.

[0042] The chip removal drive mechanism 8 is mounted on the needle punching mechanism 4 and the chip removal mechanism 7. The chip removal drive mechanism 8 is used to convert the up-and-down reciprocating motion of the needle punching drive mechanism 5 into the lateral reciprocating motion of the scraping component, so that when the needle 44 moves downward, the scraping component disengages from the needle 44, and when the needle 44 moves upward, the scraping component contacts the needle 44.

[0043] The chip removal drive mechanism 8 includes a drive plate 81 mounted on the upper transverse plate 72. A vertical guide block 82 is provided on the side of the drive plate 81. A rotating guide block 83 is rotatably connected to the lower end of the vertical guide block 82. A torsion spring is connected to the rotating shaft of the rotating guide block 83. Figure 12 As shown, the purpose of the torsion spring is to keep the rotating guide block 83 in an inclined state, and when the rotating guide block 83 rotates to this position, it cannot rotate counterclockwise under the limiting action of the lower end of the vertical guide block 82.

[0044] An extension shaft 84 is connected to the needle beam 42. One end of the extension shaft 84 is rotatably connected to a drive guide wheel 85. The drive guide wheel 85 is used to roll along the trajectory of the vertical guide block 82 and the rotating guide block 83, and drive the upper transverse plate 72 and the lower transverse plate 73 to move laterally. When the extension shaft 84 moves downward, it drives the drive guide wheel 85 to roll on the right end face of the vertical guide block 82. During this process, the drive plate 81 does not move. When the drive guide wheel 85 moves to the position of the rotating guide block 83, it presses down on the rotating guide block 83, causing it to rotate. When the drive guide wheel 85 continues to move downward and disengages from the rotating guide block 83, the rotating guide block 83 resets its rotation under the action of the torsion spring. At this time, the drive guide wheel 85 is located below the rotating guide block 83. The extension shaft 84 drives the drive guide wheel 85 to move upward, and the drive guide wheel 85 rolls along the lower inclined surface of the rotating guide block 83. While rolling, the drive guide wheel 85 pushes the drive plate 81, causing the drive plate 81 to move the upper transverse plate 72 laterally, thus realizing the state control of the scraping component.

[0045] The invention also includes a dust collection mechanism 9, which is installed below the chip removal mechanism 7 and is used to collect the raw material debris scraped off the needles 44. The dust collection mechanism 9 includes a dust collection box 91 installed on the lower end face of the drive box 71. The dust collection box 91 has several dust collection blocks 92, each in a semi-circular arc shape. Several dust collection holes 93 are provided on the inner wall of each semi-circular arc. Two adjacent dust collection blocks 92 can form a complete hollow cylindrical structure. The dust collection box 91 has a pipe interface for connecting to a dust collection device. Compared to traditional needle-punching devices that have dust collection and suction ports on both sides of the frame, this dust collection mechanism 9 can specifically suction dust from each needle 44 location and effectively improves the suction effect through 360° circumferential suction.

[0046] This invention also provides a needle-punching process for the core material of a vacuum insulation panel, comprising the following steps: S1: The combed glass fiber core material is fed into the needle punching device; S2: An intermittent conveying device is used to convey the glass fiber core material. The intermittent conveying device conveys the material when the needle 44 is separated from the core material and stops conveying when the needle 44 comes into contact with the core material. S3: Start the needle punching device. The needle punching drive mechanism 5 drives the needle plate 43 and the needle 44 to move up and down reciprocally. The barbs on the needle 44 punch the glass fiber to achieve internal entanglement of the core material, thereby improving the strength of the core material. S4: During the needle punching process, when the needle 44 moves upward, the chip removal plate 78 contacts the surface of the needle 44 to scrape off the glass fiber debris on the surface of the needle 44. When the needle 44 moves downward, the chip removal plate 78 disengages from the needle 44. S5: The hollow cylindrical dust collection block 92 formed by the dust collection mechanism 9 collects the removed glass fiber debris, and the intermittent conveying equipment outputs the needled core material to the outside of the needled device to complete the needled processing of the core material.

[0047] The needle punching process provided by this invention uses a needle punching device combined with an intermittent conveying device to perform needle punching on the core material of a vacuum insulation panel. Compared with the traditional needle punching process, it can avoid the bending or breakage of the needle caused by the simultaneous occurrence of the needle punching and conveying processes. It can also effectively reduce the diameter of the needle piercing holes, improve the needle punching effect, make the core material quality more stable, lower the thermal conductivity value, and improve the thermal insulation effect of the vacuum insulation panel.

[0048] The working process of the acupuncture device of the present invention is as follows: The core material is fed into the needle punching device. The needle punching device is started. The motor 57 drives the drive shaft 52 to rotate through the gearbox 56. The drive shaft 52 drives the needle beam 42 to move up and down through the eccentric disc 53 and the connecting rod 54, so that the needle plate 43 and the needle 44 installed below it move synchronously, thereby realizing the needle punching process of the core material.

[0049] When the needle 44 moves downward, it first passes through the guide hole on the guide plate 10 and then enters the core material. During this process, the needle beam 42 drives the extension shaft 84 and the drive guide wheel 85 to move downward synchronously. The drive guide wheel 85 rolls on the right end face of the vertical guide block 82, and the drive plate 81 does not move. The two adjacent chip removal plates 78 are in a state of mutual distance. The needle 44 does not come into contact with the chip removal plate 78 during its downward movement, thus avoiding wear between the chip removal plate 78 and the needle 44.

[0050] When the needle 44 moves upward, the drive guide wheel 85 rolls upward along the lower end of the rotating guide block 83. During this process, the drive guide wheel 85 pushes the rotating guide block 83, causing the drive plate 81 to drive the upper transverse plate 72 to slide laterally. The upper transverse plate 72 drives the lower transverse plate 73 to slide in the opposite direction through the gear 74, the upper rack 75, and the lower rack 76, so that each set of scraping components moves closer to each other. The chip removal groove 79 on the chip removal plate 78 fits against the side wall of the needle 44. Combined with the upward movement of the needle 44, the glass fiber dust and debris adhering to the surface of the needle 44 are removed, the guide plate 10 is protected, the risk of the needle 44 bending or breaking is reduced, and the needle punching effect is improved.

[0051] As the chip removal brackets 77 approach each other, they drive the dust collection mechanism 9 to move closer in sync, causing the dust collection block 92 to form a circular dust collection structure. This introduces negative pressure into the dust collection box 91, and the dust collection holes 93 evenly distributed on the inner wall of the dust collection block 92 suck up the scraped debris and dust, thereby improving the dust removal effect, preventing debris and dust from drifting into the air and affecting the environment, and preventing debris and dust from falling back into the core material raw material and affecting its thermal insulation performance.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A needle-punching device for a vacuum insulation panel core material, characterized in that, include: Side support (1), two side supports (1) are provided, and a bottom beam (2) and a top beam (3) are connected between the two side supports (1) to form the overall frame of the needle puncture device; A needle-punching mechanism (4) is installed on the lower side of the top beam (3). The needle-punching mechanism (4) includes a needle plate (43) and needles (44). The needles (44) are evenly distributed on the needle plate (43) and are used to perform needle-punching processing on the core material of the vacuum insulation board. Acupuncture drive mechanism (5) is installed on the upper side of the top beam (3). The acupuncture drive mechanism (5) includes a motor (57) and a linear reciprocating drive assembly, which is used to drive the needle plate (43) to drive the needle (44) to move up and down reciprocally. Guide plate (10), the guide plate (10) is installed between two side brackets (1) and located below the needle plate (43). The guide plate (10) is provided with guide holes corresponding to the position of the needle (44) on the needle plate (43) for supporting and guiding the needle (44) during the movement. The chip removal mechanism (7) is installed on the lower side of the guide plate (10). The chip removal mechanism (7) includes a drive box (71), an upper transverse plate (72) and a lower transverse plate (73) installed on one side of the guide plate (10). The upper transverse plate (72) and the lower transverse plate (73) are slidably connected in the drive box (71). The upper transverse plate (72) and the lower transverse plate (73) are connected with scraping components for removing chips from the surface of the needle (44). The chip removal drive mechanism (8) is mounted on the needle punching mechanism (4) and the chip removal mechanism (7). The chip removal drive mechanism (8) is used to convert the up-and-down reciprocating motion of the needle punching drive mechanism (5) into the lateral reciprocating motion of the scraping component, so that when the needle (44) moves downward, the scraping component disengages from the needle (44), and when the needle (44) moves upward, the scraping component contacts the needle (44).

2. The needle-punching device for a vacuum insulation panel core material according to claim 1, characterized in that: The needle-punching mechanism (4) also includes a guide frame (41) and a needle beam (42). Several guide frames (41) are provided and are symmetrically installed on the front and rear sides of the lower end of the top beam (3). The needle beam (42) is provided with sliding rods on both sides. The needle beam (42) is slidably connected to the vertical groove on the guide frame (41) through the sliding rods. The needle plate (43) is fixedly installed at the lower end of the needle beam (42).

3. The needle-punching device for a vacuum insulation panel core material according to claim 2, characterized in that: The linear reciprocating drive assembly includes several bearing seats (51) mounted on the top beam (3), a drive shaft (52) is rotatably connected to the bearing seats (51), and an eccentric disk (53) is keyed to the drive shaft (52). The eccentric disc (53) is rotatably connected to a connecting rod (54), and a connecting seat (55) is installed on the upper end face of the needle beam (42). The lower end of the connecting rod (54) is rotatably connected to the connecting seat (55). A gearbox (56) is mounted on the bracket of the top beam (3), the drive shaft (52) is connected to the output end of the gearbox (56), and the motor (57) is mounted on the input end of the gearbox (56).

4. The needle-punching device for a vacuum insulation panel core material according to claim 1, characterized in that: The scraping assembly includes a chip removal bracket (77) and a chip removal plate (78). The chip removal plate (78) slides laterally in a groove on the chip removal bracket (77). A spring for pushing the chip removal plate (78) outward is also provided in the groove. The chip removal plate (78) is provided with a plurality of chip removal grooves (79) corresponding to the needle (44). The adjacent chip removal brackets (77) are respectively installed on the upper transverse plate (72) and the lower transverse plate (73), so that the two chip removal plates (78) arranged in opposite directions form a set of scraping components; the number of scraping components corresponds to the number of rows of needles (44).

5. The needle-punching device for a vacuum insulation panel core material according to claim 4, characterized in that: A gear (74) is rotatably connected inside the drive box (71). The gear (74) is located between the upper transverse plate (72) and the lower transverse plate (73). An upper rack (75) is installed on the lower end face of the upper transverse plate (72), and a lower rack (76) is installed on the upper end face of the lower transverse plate (73). Both the upper rack (75) and the lower rack (76) mesh with the gear (74).

6. The needle-punching device for a vacuum insulation panel core material according to claim 2, characterized in that: The chip removal drive mechanism (8) includes a drive plate (81) mounted on the upper transverse plate (72), a vertical guide block (82) is provided on the side of the drive plate (81), a rotating guide block (83) is rotatably connected to the lower end of the vertical guide block (82), and a torsion spring is connected to the rotating shaft of the rotating guide block (83). An extension shaft (84) is connected to the needle beam (42). One end of the extension shaft (84) is rotatably connected to a drive guide wheel (85). The drive guide wheel (85) is used to roll along the trajectory of the vertical guide block (82) and the rotating guide block (83), and drive the upper transverse plate (72) and the lower transverse plate (73) to move laterally.

7. The needle-punching device for a vacuum insulation panel core material according to claim 1, characterized in that: The adjacent scraping components are staggered vertically, and the wear resistance coefficient of the chip removal plate (78) is lower than that of the needle (44).

8. The needle-punching device for a vacuum insulation panel core material according to claim 1, characterized in that: It also includes a dust collection mechanism (9), which is installed on the lower side of the chip removal mechanism (7) and is used to collect the raw material debris scraped off the needle (44).

9. The needle-punching device for a vacuum insulation panel core material according to claim 8, characterized in that: The dust collection mechanism (9) includes a dust collection box (91) installed on the lower end face of the drive box (71). The dust collection box (91) is provided with a number of dust collection blocks (92). The dust collection blocks (92) are semi-circular arc-shaped. The inner wall of the arc of the dust collection block (92) is provided with a number of dust collection holes (93). Two adjacent dust collection blocks (92) can form a complete hollow cylindrical structure. The dust collection box (91) is provided with a pipe interface for connecting the vacuuming equipment.

10. A process for needle-punching the core material of a vacuum insulation panel using the needle-punching device as described in any one of claims 1-9, characterized in that, Includes the following steps: S1: The combed glass fiber core material is fed into the needle punching device; S2: An intermittent conveying device is used to convey the glass fiber core material. The intermittent conveying device conveys the material when the needle (44) is separated from the core material and stops conveying when the needle (44) comes into contact with the core material. S3: Start the needle punching device. The needle punching drive mechanism (5) drives the needle plate (43) and the needle (44) to move up and down. The barbs on the needle (44) punch the glass fiber to achieve internal entanglement of the core material, so as to improve the strength of the core material. S4: During the needle punching process, when the needle (44) moves upward, the chip removal plate (78) contacts the surface of the needle (44) to scrape off the glass fiber debris on the surface of the needle (44). When the needle (44) moves downward, the chip removal plate (78) separates from the needle (44). S5: The hollow cylindrical dust collection block (92) formed by the dust collection mechanism (9) is used to collect the removed glass fiber debris. The intermittent conveying equipment outputs the needled core material to the outside of the needled device to complete the needled processing of the core material.

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