WO2023151384A1 - Production process of sticking-proof polyester needled felt - Google Patents

Abstract

Disclosed is a production process of a sticking-proof polyester needled felt, in which a multi-component hybrid structure is constructed after a polyester needled felt is coated. The process achieves good sticking-proof effects, while employing a low-damage needle punching technique to bring chopped fibers into the thickness direction of a fiber material by means of a felting needle. The process of the sticking-proof polyester needled felt improves the inter-layer strength of a fiber web. The key points of the production process comprise: after a polyester needled felt is coated, a multi-component hybrid structure is constructed, thereby achieving water repellency greater than grade 4, oil repellency greater than grade 3 and good sticking-proof effects. The low-damage needle punching technique is employed to bring the chopped fibers into the thickness direction of the filter material by means of the felting needle, thereby improving the inter-layer strength of the fiber web.

Description

A production process of polyester anti-sticking bag needle felt technical field

The invention relates to the technical field of needle-punched felt production technology, more specifically, it relates to a production technology of polyester anti-sticking bag needle-punched felt.

Background technique

Polyester is the chemical fiber with the highest output, accounting for more than 80% of the output. Polyester fiber has a melting point of about 230°C and has good temperature resistance. Its instantaneous temperature can reach 120°C, and it has good wear resistance. It is the most widely used variety in felt materials. Most of the smoke and dust filtration conditions are acidic atmospheres, and polyester has good acid resistance, so it is widely used in the field of smoke and dust filtration. The present invention intends to form polyester into needle-punched felt through carding and needle-punching reinforcement processes, and through further chemical finishing, endow it with anti-sticking bags and other functions, and expand its application in the field of medium temperature filtration. The economic benefit is good and the market prospect is broad.

And in the production, we found that when the felt is needled, the needle is too rigid during the needle punching process, which will have a great impact on the felt, especially when the needle is punched with a thicker felt, the needle does not have The cushioning effect increases the loss of the felt during needle punching, and also causes vibration due to the high-frequency up and down movement of the needle plate driven by the eccentric link mechanism. This part of the force will act on the felt through the needles, or directly on the needles , When the vibration is large, it will cause broken needles and affect production and product quality.

Contents of the invention

In view of the deficiencies in the prior art, the purpose of the present invention is to provide a multi-component hybrid structure construction after coating the polyester needle felt, which has a good anti-paste bag effect, and the short-cut The fiber is brought into the thickness direction of the filter material through the needle, which improves the production process of the polyester anti-sticking bag needle felt with improved interlayer strength of the fiber net.

In order to achieve the above object, the present invention provides the following technical solutions: a production process of polyester anti-sticking bag needle felt, comprising the following steps, S1, fiber proportioning, mixing: choose PTFE fiber and polyester, between PTFE fiber and polyester The mixing ratio is 2:5;

S2. Opening: The mixed and treated polyester and PTFE fibers are fed to the carding needle opening machine through the conveying flat curtain in turn, and the carding needle beater rotates at a speed of 300r/min to perform free opening and separate collection;

S3. Carding and laying: the netting speed of the carding machine is 20m/min, and the PTFE fiber and polyester mixed fiber net made by the carding machine are ready for use, and the mixed fiber net is laid on the surface of the reinforced base cloth, and the netting speed is 4m/min , the laid fiber web is fed into the needling area by the web feeding mechanism;

S4. Acupuncture: Send the combined net formed by the mixed fiber web and the reinforced base fabric into the acupuncture area of the acupuncture machine, and acupuncture the above-mentioned net layer to acupuncture the highly fluffy and weak fiber web, the depth of acupuncture is 5mm , needling density 450 needles/cm ² , output speed 20m/min;

S5. Re-acupuncture: By adopting low-damage acupuncture technology, PTFE short fibers are brought into the thickness direction of the above-mentioned fiber layer with the acupuncture action. pressure;

S6. Singeing: performing singeing treatment on the materials after acupuncture treatment to remove the burrs and hair balls of the materials;

S7. Waterproof and oil-proof treatment: Prepare impregnating glue containing waterproof and oil-proof agent, pour the evenly stirred impregnating glue into the dipping pool, and the fiber needle felt is driven by the roller into the dipping pool for dipping, inside the dipping pool When the liquid level is lower than the set water level line, it will automatically replenish the impregnation glue to ensure the continuous progress of the impregnation process;

S8. Shaping: first remove the residual moisture in the needle felt at low temperature, and control the amount of residual glue by adjusting the drying temperature and time; then, heat the impregnated glue to cure and shape through high temperature drying;

S9. Hot-rolled coating: hot-press the PTFE film and the needle-punched felt substrate through a hot-pressed coating machine, control the temperature of the heating roller at 300°C-400°C, the pressure at 24.0kg/cm, and the speed of the heating roller at 50 rpm /min;

S10. Cooling and rewinding: rewinding the material after surface gluing is carried out through the rewinding roller with cooling liquid.

The present invention is further set as follows: the acupuncture machine in the acupuncture step in step S4 includes a main transmission part, a needle beam connected to the main transmission part, a needle board connected to the needle beam, and several needles arranged on the needle board , the needle plate is provided with an inner buffer device, the inner buffer device includes a force-bearing part and a buffer part, and the force-bearing part includes an installation chamber arranged in the needle board, a force cylinder arranged in the installation chamber and The piston moves the first piston disposed in the force cylinder, the piston rod of the first piston is connected with a force plate that is slidably connected with the installation chamber, and the installation chamber is also provided with a sliding connection with the installation chamber and a The mounting plate connected to the force plate, each of the needles is arranged on the mounting plate;

The buffer part includes an oil return cylinder and a second piston arranged in the oil return cylinder for piston movement. The rodless chamber of the stressed cylinder is provided with an oil outlet, and the rodless chamber of the oil return cylinder is provided with an oil inlet. The oil outlet and the oil inlet are connected through the oil circuit;

There is a first spring set outside the first piston rod between the force plate and the force cylinder, and a sealing plate is set on the second piston rod and is set in the rod cavity of the oil return cylinder and is set on the second piston rod. The second spring outside the two piston rods.

The present invention is further set as follows: the internal buffer device also includes an anti-return mechanism, which is used to limit the rebound of the force-bearing plate during the force-bearing process; the anti-reset mechanism includes an air chamber with an open end, and the sealing plate The sliding seal is arranged on the opening of the air chamber, and the outer wall of the air chamber has an inlet port and an exhaust port arranged away from the opening, and the anti-reset mechanism also includes a The first pressure sensor, the one-way valve arranged on the exhaust port, the electric control valve and the controller arranged on the intake port, the pressure sensor, the electric control valve and the controller are electrically connected.

The present invention is further set as follows: the control steps of the anti-reset mechanism are as follows, S11, after the mounting plate is forced to squeeze the stressed plate, the pressure sensor sends the detected pressure signal to the controller;

S12. The controller disconnects the electric control valve through the pressure signal, and at this time, the air chamber is in a one-way conduction state;

S13. The force plate squeezes the first spring and pushes the first piston, so that the hydraulic oil in the force cylinder flows to the return cylinder. Under the action of the hydraulic oil, the second piston pushes the second piston after overcoming the resistance of the second spring. The movement of the two piston rods makes the sealing plate move to the air chamber, and the gas in the air chamber is discharged from the one-way valve on the exhaust port until the sealing plate stops moving. Not connected, the air pressure in the air chamber is lower than the atmospheric pressure, so that the position of the sealing plate is always in a balanced state;

S14. The mounting plate breaks away from the extrusion of the force plate, that is, the pressure detected by the pressure sensor disappears, and the controller opens the electric control valve. At this time, the air chamber is in a bidirectional conduction state, and the gas can flow from The electric control valve flows into the air chamber, and the air pressure in the air chamber gradually tends to balance with the atmospheric pressure, and the second spring pulls the sealing plate back to reset; the hydraulic oil flows back from the return cylinder to the force cylinder, and the first spring resets.

The present invention is further configured as follows: the air chamber is also provided with an inner support mechanism for limiting the limit moving distance of the sealing plate, and the inner support mechanism includes an inner chamber, an adjustment plate, an adjustment rod, and a return spring arranged in the air chamber And the inner baffle plate, which has a chute extending inwardly at one end facing the sealing plate, a cover plate is arranged on the port of the chute, the adjustment plate is slidably arranged in the chute, and one end of the adjustment rod is arranged on On the adjusting plate, the other end is set through the cover plate, the inner baffle is set on the extending end of the adjusting rod, and the return spring is sleeved on the adjusting rod.

The present invention is further provided that: the internal support mechanism further includes a pressure regulator arranged in the inner chamber, the pressure regulator includes a permanent magnet arranged on the regulating plate and facing away from the regulating rod, and a permanent magnet arranged on the gas The electromagnet on the interior wall and facing the permanent magnet and the second pressure sensor arranged on the inner baffle and facing the sealing plate, and the magnetic pole of the permanent magnet is set to repel the electromagnet after energization, the The electromagnet and the second pressure sensor are electrically connected to the controller.

The present invention is further set as follows: the internal pressure control step of the internal support mechanism is as follows, when the pressure value detected by the first pressure sensor, and the detected pressure value gradually decreases and tends to a constant value, the constant value is greater than zero , the inner support mechanism does not block the sealing plate, and the controller controls the current of the electromagnetic coil on the electromagnet to be 0;

When the pressure value detected by the first pressure sensor remains unchanged or gradually increases, and when the pressure is detected by the second pressure sensor, the controller needs to compare the pressure with the pressure value detected by the second pressure sensor. A current with a matching value passes through the electromagnetic coil on the electromagnet, causing the electromagnet to generate a corresponding repulsion force, which repels the permanent magnet and blocks the sealing plate.

By adopting the above-mentioned technical scheme, the beneficial effects are as follows: 1. After covering the polyester needle-punched felt, the multi-component hybrid structure is constructed, and the water spraying level is greater than 4, the oleophobic level is greater than 3, and the effect of anti-sticking bags is good. Through The low-damage needle punching technology brings the chopped fibers into the thickness direction of the filter material through the needles, which improves the interlayer strength of the fiber web;

2. In order to reduce the damage to the felt during the needling process in step 4, it is necessary to buffer the needling process and keep the buffered needles under pressure to prevent secondary damage to the felt. Question, by setting the acupuncture machine in the acupuncture step in step S4 to include a main transmission part, a needle beam connected to the main transmission part, a needle board connected to the needle beam, and several needles arranged on the needle board, the needle An inner buffer device is provided in the plate, and the inner buffer device is set to include a force-bearing part and a buffer part. The force-bearing part includes an installation chamber arranged in the needle plate, a force cylinder arranged in the installation chamber, and a piston movement The first piston is arranged in the force cylinder, the piston rod of the first piston is connected with the force plate which is slidingly connected with the installation chamber, and the installation chamber is also provided with a mounting plate which is slidably connected with the installation chamber and connected with the force plate. plate, each needle is set on the mounting plate;

The buffer part includes the oil return cylinder and the second piston which is set in the oil return cylinder by the piston movement. The rodless chamber of the force cylinder is provided with an oil outlet, and the rodless chamber of the oil return cylinder is provided with an oil inlet, an oil outlet and an oil inlet. Through the connection of the oil circuit, by adopting the above-mentioned structural settings, it is composed of two parts: the force cylinder and the oil return cylinder. When the force cylinder is stressed, the oil pressure will further enter the return cylinder, forming the first buffer effect at this time;

Further, a first spring is set outside the first piston rod between the force plate and the force cylinder, and the second piston rod is also provided with a sealing plate and is arranged in the rod cavity of the oil return cylinder and is set on the second piston rod. The second spring outside the piston rod, through the first spring and the second spring, forms a second buffer effect when the force plate is stressed, ensuring the buffer formed during the needle punching process and improving the resistance to short fibers. Acupuncture effect ensures the overall structural strength, strong stability and simple structure;

3. In order to further prevent the springback phenomenon of the lancet after being buffered by force, the inner buffer device is set to include an anti-reset mechanism, the anti-reset mechanism is set to include an air chamber with one end open, and the sealing plate is set to slide and seal On the opening of the air chamber, the outer wall of the air chamber has an inlet port and an exhaust port arranged away from the opening, and the anti-reset mechanism also includes a first pressure sensor arranged on the outer surface of the force plate, and an outlet port arranged on the outer surface of the air chamber. The one-way valve, the electric control valve and the controller set on the air inlet port, the pressure sensor, the electric control valve and the controller are electrically connected. When the board moves inward, the gas in the air chamber is discharged from the one-way valve at the exhaust port. At this time, the atmospheric pressure is greater than the air pressure in the air chamber, thereby forming the effect of maintaining pressure and preventing the needle from rebounding during the acupuncture process. Good effect, simple structure;

4. Further, the internal support mechanism also includes a pressure regulator arranged in the inner chamber, and the pressure regulator includes a permanent magnet arranged on the regulating plate and facing away from the regulating rod, and is arranged on the inner wall of the gas chamber and facing The electromagnet of the permanent magnet and the second pressure sensor that is arranged on the inner baffle and facing the sealing plate, and the magnetic pole of the permanent magnet is set to repel the electromagnet after electrification, and the electromagnet and the second pressure sensor are electrically connected to the On the controller, according to the above-mentioned structural settings, it is necessary to avoid the force cylinder and the oil return cylinder being in a buffer state all the time due to the continuous increase of pressure during the acupuncture process. In order to limit the movement of the limit distance of the sealing plate, it is necessary to adjust the pressure The position of the sealing plate is blocked by the second pressure sensor. When the second pressure sensor detects the pressure, the electromagnet is energized to make the electromagnet and the permanent magnet repel each other, so that the second half of the acupuncture process is continuous pressure holding. Acupuncture ensures the stability of acupuncture, simple structure and strong practicability.

Description of drawings

Fig. 1 is a schematic diagram of the needling structure of a production process embodiment of a polyester anti-sticking bag needling felt according to the present invention.

Fig. 2 is a schematic structural diagram of the inner buffer device of a production process embodiment of a polyester anti-sticking bag needle felt according to the present invention.

Fig. 3 is an enlarged schematic diagram of the structure at point A in Fig. 2 of a production process embodiment of a polyester anti-sticking bag needle felt according to the present invention.

Reference signs in the figure, 1, main transmission part; 2, needle beam; 3, needle plate; 4, needle; 30, installation chamber; 31, force cylinder; 32, first piston; 33, force plate; 34, mounting plate; 35, first spring; 40, oil return cylinder; 41, second piston; 42, second spring; 50, air chamber; 51, sealing plate; 501, intake port; 502, exhaust port; 52. The first pressure sensor; 503. One-way valve; 504. Electric control valve; 505. Controller; 60. Inner chamber; 61. Adjusting plate; ; 70, permanent magnet; 71, electromagnet; 72, the second pressure sensor.

Detailed ways

Referring to Fig. 1 to Fig. 3, the production process example of a polyester anti-sticking bag needle felt of the present invention will be further described.

For ease of description, spatially relative terms such as "upper", "lower", "left", "right", etc. are used in the embodiments to describe the position of one element or feature shown in the figures relative to another element or feature. relation. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative specifications used herein interpreted accordingly.

Moreover, relative terms such as "first" and "second", etc. are only used to distinguish one from another element having the same name, and do not necessarily require or imply any such actual existence between these elements. relationship or sequence.

A production process of polyester anti-sticking bag needle felt, comprising the following steps, S1, fiber ratio, mixing: select PTFE fiber and polyester, the mixing ratio between PTFE fiber and polyester is 2:5;

S2. Opening: The mixed and treated polyester and PTFE fibers are fed to the carding needle opening machine through the conveying flat curtain in turn, and the carding needle beater rotates at a speed of 300r/min to perform free opening and separate collection;

S3. Carding and laying: the netting speed of the carding machine is 20m/min, and the PTFE fiber and polyester mixed fiber net made by the carding machine are ready for use, and the mixed fiber net is laid on the surface of the reinforced base cloth, and the netting speed is 4m/min , the laid fiber web is fed into the needling area by the web feeding mechanism;

S4. Acupuncture: Send the combined net formed by the mixed fiber web and the reinforced base fabric into the acupuncture area of the acupuncture machine, and acupuncture the above-mentioned net layer to acupuncture the highly fluffy and weak fiber web, the depth of acupuncture is 5mm , needling density 450 needles/cm ² , output speed 20m/min;

S5. Re-acupuncture: By adopting low-damage acupuncture technology, PTFE short fibers are brought into the thickness direction of the above-mentioned fiber layer with the acupuncture action. pressure;

S6, singeing: singeing the material after acupuncture treatment to remove the burrs and hair balls of the material;

S7. Waterproof and oil-proof treatment: Prepare impregnating glue containing waterproof and oil-proof agent, pour the evenly stirred impregnating glue into the dipping pool, and the fiber needle felt is driven by the roller into the dipping pool for dipping, inside the dipping pool When the liquid level is lower than the set water level line, it will automatically replenish the impregnation glue to ensure the continuous progress of the impregnation process;

S8. Shaping: first remove the residual moisture in the needle felt at low temperature, and control the amount of residual glue by adjusting the drying temperature and time; then, heat the impregnated glue to cure and shape through high temperature drying;

S9. Hot-rolled coating: hot-press the PTFE film and the needle-punched felt substrate through a hot-pressed coating machine, control the temperature of the heating roller at 300°C-400°C, the pressure at 24.0kg/cm, and the speed of the heating roller at 50 rpm /min;

S10. Cooling and rewinding: rewinding the material after surface gluing is carried out through the rewinding roller with cooling liquid.

Polyester needle-punched felt is coated with a film and multi-component hybrid structure is constructed to achieve a water spraying level greater than 4, an oleophobic level greater than 3, and a good effect of anti-sticking bags. The chopped fibers are passed through the low-damage needle forming technology The needles 4 are brought into the thickness direction of the filter material, which improves the interlayer strength of the fiber web.

The present invention is further provided that the acupuncture machine in the acupuncture step in step S4 includes a main transmission part 1, a needle beam 2 connected with the main transmission part 1, a needle board 3 connected with the needle beam 2, and a needle loom arranged on the needle board 3. For several puncture needles 4 on the needle plate 3, an inner buffer device is provided, and the inner buffer device includes a force-bearing part and a buffer part. The force-bearing part includes an installation chamber 30 arranged in the needle board 3, an The inner force cylinder 31 and the piston movement are arranged on the first piston 32 in the force cylinder 31; There is a mounting plate 34 that is slidably connected to the mounting chamber 30 and connected to the force plate 33, and each needle 4 is arranged on the mounting plate 34;

The buffer part includes the oil return cylinder 40 and the second piston 41 which is arranged in the oil return cylinder 40 by the piston movement. The port and the oil inlet are connected through the oil circuit;

Between the force plate 33 and the force cylinder 31, a first spring 35 is set outside the rod of the first piston 32, and the second piston 41 rod is also provided with a sealing plate 51 and is arranged in the rod cavity of the oil return cylinder 40. The second spring 42 is sleeved on the outside of the second piston 41 rod.

In order to reduce the damage to the felt during the needle punching process in step 4, it is necessary to buffer the needle punching process and keep the buffered needle 4 under pressure to prevent secondary damage to the felt. , by setting the acupuncture machine in the acupuncture step in step S4 to include the main transmission part 1, the needle beam 2 connected with the main transmission part 1, the needle board 3 connected with the needle beam 2 and the A number of punching needles 4, the needle board 3 is provided with an inner buffer device, and the inner buffer device is set to include a force-bearing part and a buffer part, the force-bearing part includes an installation chamber 30 arranged in the needle board 3, and is arranged on the installation The force cylinder 31 in the chamber 30 and the first piston 32 arranged in the force cylinder 31 for piston movement, the piston rod of the first piston 32 is connected with the force plate 33 that is slidably connected with the installation chamber 30, and the installation chamber 30 is also provided with a mounting plate 34 that is slidably connected to the mounting chamber 30 and connected to the force plate 33, and each needle 4 is arranged on the mounting plate 34;

The buffer part includes the oil return cylinder 40 and the second piston 41 which is arranged in the oil return cylinder 40 by the piston movement. The port and the oil inlet are connected through an oil circuit. By adopting the above-mentioned structural settings, the force cylinder 31 and the oil return cylinder 40 are composed of two parts. When the force cylinder 31 is stressed, the oil pressure will further enter the oil return cylinder 40. When the first buffer effect is formed;

Further, between the force plate 33 and the force cylinder 31, the first spring 35 is set outside the rod of the first piston 32, and the rod of the second piston 41 is also provided with a sealing plate 51 and a rod arranged on the oil return cylinder 40. The second spring 42 in the cavity and set outside the rod of the second piston 41, through the first spring 35 and the second spring 42, when the force plate 33 is stressed, the second buffer effect is formed, ensuring the formation of The cushioning during the needling process improves the needling effect on short fibers and ensures the overall structural strength, strong stability and simple structure.

The present invention is further provided that the inner buffer device also includes an anti-return mechanism, which is used to limit the rebound of the stressed plate 33 during the force-bearing process; the anti-reset mechanism includes an air chamber 50 with one end open, and the sealing plate 51 is slidably sealed. On the opening of the air chamber 50, the outer wall of the air chamber 50 has an inlet port 501 and an exhaust port 502 arranged away from its opening, and the anti-reset mechanism also includes a first pressure sensor 52 arranged on the outer surface of the force plate 33, The one-way valve 503 disposed on the exhaust port 502, the electric control valve 504 and the controller 505 disposed on the intake port 501, and the pressure sensor, the electric control valve 504 and the controller 505 are electrically connected.

In order to further prevent the phenomenon that the needle 4 rebounds after being buffered by force, the inner buffer device is set to also include an anti-reset mechanism, and the anti-reset mechanism is set to include an air chamber 50 with one end open, and the sealing plate 51 is slid and sealed. It is arranged on the opening of the air chamber 50, and the outer wall of the air chamber 50 has an air inlet port 501 and an exhaust port 502 arranged away from its opening, and the anti-reset mechanism also includes a first pressure sensor 52 arranged on the outer surface of the force plate 33 , the one-way valve 503 arranged on the exhaust port 502, the electric control valve 504 and the controller 505 arranged on the intake port 501, the pressure sensor, the electric control valve 504 and the controller 505 are electrically connected, and the above structure is adopted , because the sealing plate 51 and the air chamber 50 are set in a sliding sealing structure, when the sealing plate 51 moves inward, the gas in the air chamber 50 is discharged from the check valve 503 at the exhaust port 502, and the atmospheric pressure is greater than that in the air chamber 50 Air pressure, thereby forming the effect of maintaining pressure, preventing the rebound phenomenon of the needle 4 during the acupuncture process, with good effect and simple structure.

The present invention is further provided that the control steps of the anti-reset mechanism are as follows, S11, after the mounting plate 34 is forced to squeeze the force plate 33, the pressure sensor sends the detected pressure signal to the controller 505;

S12. The controller 505 disconnects the electric control valve 504 through the pressure signal, and at this time, the air chamber 50 is in a one-way conduction state;

S13, the force plate 33 squeezes the first spring 35, and pushes the first piston 32, so that the hydraulic oil in the force cylinder 31 flows to the return cylinder 40, and the second piston 41 overcomes the second spring under the action of the hydraulic oil. After the resistance of 42, push the second piston 41 to move, so that the sealing plate 51 moves into the air chamber 50, and the gas in the air chamber 50 is discharged from the check valve 503 on the exhaust port 502 until the sealing plate 51 stops moving. During this process, the air chamber 50 is always in a sealed state and does not communicate with the outside air pressure. The air pressure in the air chamber 50 is lower than the atmospheric pressure, so that the position of the sealing plate 51 is always in a balanced state;

S14, the mounting plate 34 breaks away from the extrusion of the force plate 33, that is, the pressure detected by the pressure sensor disappears, the controller 505 opens the electric control valve 504, and the air chamber 50 is in a bidirectional conduction state at this time, The gas can flow from the electric control valve 504 into the air chamber 50, and the air pressure in the air chamber 50 gradually tends to balance with the atmospheric pressure, and the second spring 42 pulls the sealing plate 51 back to reset; the hydraulic oil flows back from the oil return cylinder 40 Forced cylinder 31, the first spring 35 resets.

The present invention is further provided that an inner support mechanism is also provided in the air chamber 50 to limit the limit moving distance of the sealing plate 51, and the inner support mechanism includes an inner chamber 60 arranged in the air chamber 50, an adjustment plate 61, and an adjustment rod. 62. Back-moving spring 63 and inner baffle plate 64 have a chute extending inwardly at one end facing the sealing plate 51, the port of the chute is provided with a cover plate, the adjusting plate 61 is slidably arranged in the chute, and the adjusting rod 62 One end is arranged on the adjustment plate 61, and the other end is arranged through the cover plate. The inner baffle plate 64 is arranged on the extended end of the adjustment rod 62, and the return spring 63 is sleeved on the adjustment rod 62. The above-mentioned structure is adopted. The set internal support mechanism moves the sealing plate 51 in a limited position. The inner chamber 60 is used as the main carrier chamber. One end of the return spring 63 is in contact with the inner baffle 64, and the other end is in contact with the cover plate, forming the inner baffle 64. The main support method has a simple structure and strong stability. When the pressure of the sealing plate 51 is lost, it can be reset under the action of the return spring 63. The structure is simple and the stability is strong.

The present invention is further provided that the inner support mechanism also includes a pressure regulator arranged in the inner chamber 60, and the pressure regulator includes a permanent magnet 70 arranged on the adjustment plate 61 and arranged opposite to the adjustment rod 62, and arranged in the air chamber. 50 on the inner wall and facing the electromagnet 71 of the permanent magnet 70 and being arranged on the inner baffle plate 64 and facing the second pressure sensor 72 of the sealing plate 51, and the magnetic pole of the permanent magnet 70 is set to the electromagnet 71 after electrification Repel each other, the electromagnet 71 and the second pressure sensor 72 are electrically connected to the controller 505, and further, the internal support mechanism also includes a pressure regulator arranged in the inner chamber 60, and the pressure regulator includes a pressure regulator arranged on the regulating plate 61 and the permanent magnet 70 set against the adjustment rod 62, the electromagnet 71 set on the inner wall of the air chamber 50 and facing the permanent magnet 70, and the second pressure sensor set on the inner baffle plate 64 and facing the sealing plate 51 72, and the magnetic poles of the permanent magnet 70 are set to repel the electromagnet 71 after energization, the electromagnet 71 and the second pressure sensor 72 are electrically connected to the controller 505, and the above-mentioned structure is set to avoid , the pressure is constantly increasing, and the force cylinder 31 and the oil return cylinder 40 are always in a buffer state. In order to limit the movement of the limit distance of the sealing plate 51, the position of the sealing plate 51 needs to be blocked by a pressure regulator. When the second When the pressure sensor 72 detects the pressure, the electromagnet 71 is energized to make the electromagnet 71 and the permanent magnet 70 repel each other, so that the second half of the acupuncture process is continuous pressure-holding acupuncture to ensure the stability of the acupuncture. High performance, simple structure and strong practicability.

The present invention further provides that the internal pressure control step of the internal support mechanism is as follows, when the pressure value detected by the first pressure sensor 52 gradually decreases and tends to a constant value, the constant value is greater than zero, The inner support mechanism does not block the sealing plate 51, and the controller 505 controls the current of the electromagnetic coil on the electromagnet 71 to be 0;

When the pressure value detected by the first pressure sensor 52 is constant or gradually increases, and when the pressure is detected by the second pressure sensor 72, the controller 505 needs to, according to the pressure value detected by the second pressure sensor 72, The current matching the pressure value is passed through the electromagnetic coil on the electromagnet 71 , so that the electromagnet 71 generates a corresponding repulsive force, repulses the permanent magnet 70 , and blocks the sealing plate 51 .

In the embodiment of the present invention, the force cylinder 31 and the oil return cylinder 40 are used as the main buffer means, and the closed air chamber 50 structure is used to achieve a good pressure maintaining effect. When the felt is acupunctured, a pressure regulator is also provided to form an internal support for the needle 4, which has strong stability, simple structure, greatly improved acupuncture effect, and can also ensure the stability of acupuncture, and It reduces the damage to the felt and has strong practicability.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention shall be included in the protection scope of the present invention.

Claims (7)

1. A production process of polyester anti-sticking bag needle felt, is characterized in that, comprises the following steps, S1, fiber proportioning, mixing: select PTFE fiber and polyester, the mixing ratio between PTFE fiber and polyester is 2:5;

   S2. Opening: The mixed and treated polyester and PTFE fibers are fed to the carding needle opening machine through the conveying flat curtain in turn, and the carding needle beater rotates at a speed of 300r/min to perform free opening and separate collection;

   S3. Carding and laying: the netting speed of the carding machine is 20m/min, and the PTFE fiber and polyester mixed fiber net made by the carding machine are ready for use, and the mixed fiber net is laid on the surface of the reinforced base cloth, and the netting speed is 4m/min , the laid fiber web is fed into the needling area by the web feeding mechanism;

   S4. Acupuncture: Send the combined net formed by the mixed fiber web and the reinforced base fabric into the acupuncture area of the acupuncture machine, and acupuncture the above-mentioned net layer to acupuncture the highly fluffy and weak fiber web, the depth of acupuncture is 5mm , needling density 450 needles/cm ² , output speed 20m/min;

   S5. Re-acupuncture: By adopting low-damage acupuncture technology, PTFE short fibers are brought into the thickness direction of the above-mentioned fiber layer with the acupuncture action. pressure;

   S6. Singeing: performing singeing treatment on the materials after acupuncture treatment to remove the burrs and hair balls of the materials;

   S7. Waterproof and oil-proof treatment: Prepare impregnating glue containing waterproof and oil-proof agent, pour the evenly stirred impregnating glue into the dipping pool, and the fiber needle felt is driven by the roller into the dipping pool for dipping, inside the dipping pool When the liquid level is lower than the set water level line, it will automatically replenish the impregnation glue to ensure the continuous progress of the impregnation process;

   S8. Shaping: first remove the residual moisture in the needle felt at low temperature, and control the amount of residual glue by adjusting the drying temperature and time; then, heat the impregnated glue to cure and shape through high temperature drying;

   S9. Hot-rolled coating: hot-press the PTFE film and the needle-punched felt substrate through a hot-pressed coating machine, control the temperature of the heating roller at 300°C-400°C, the pressure at 24.0kg/cm, and the speed of the heating roller at 50 rpm /min;

   S10, cooling and rewinding: the material after surface glue coating is rewound through the rewinding roller passing through the cooling liquid.
2. The production process of a polyester anti-sticking bag needle felt according to claim 1, characterized in that, the needling machine in the needling step in the step S4 includes a main transmission part (1), and a main transmission part (1) The needle beam (2) connected, the needle plate (3) connected with the needle beam (2) and a number of needles (4) arranged on the needle plate (3), the needle plate (3) is equipped with An inner buffer device, the inner buffer device includes a force-bearing part and a buffer part, and the force-bearing part includes an installation chamber (30) arranged in the needle plate (3), a force-bearing chamber (30) arranged in the installation chamber (30) The cylinder (31) and the piston move the first piston (32) arranged in the force cylinder (31), and the piston rod of the first piston (32) is connected with a force plate slidingly connected with the installation chamber (30) (33), the installation chamber (30) is also provided with a installation plate (34) that is slidably connected to the installation chamber (30) and connected to the force plate (33), and each of the needles (4) is arranged on on the mounting plate (34);

   The buffer part includes an oil return cylinder (40) and a second piston (41) arranged in the oil return cylinder (40) for piston movement. The rodless cavity of the stressed cylinder (31) is provided with an oil outlet. The rodless cavity of the oil cylinder (40) is provided with an oil inlet, and the oil outlet and the oil inlet are connected through an oil circuit;

   A first spring (35) that is sleeved outside the rod of the first piston (32) is provided between the stressed plate (33) and the stressed cylinder (31), and a spring (35) is provided on the rod of the second piston (41). The sealing plate (51) and the second spring (42) arranged in the rod cavity of the oil return cylinder (40) and sleeved outside the rod of the second piston (41).
3. The production process of polyester anti-sticking bag needle felt according to claim 2, characterized in that, the inner buffer device also includes an anti-reset mechanism, which is used to limit the stress plate (33) during the stress process. rebound occurs in the middle; the anti-reset mechanism includes an air chamber (50) with an open end, and the sealing plate (51) is slidably and sealingly arranged on the opening of the air chamber (50), and the outer wall of the air chamber (50) There is an air inlet port (501) and an exhaust port (502) arranged away from its opening, and the anti-reset mechanism also includes a first pressure sensor (52) arranged on the outer surface of the force plate (33), The one-way valve (503) arranged on the exhaust port (502), the electric control valve (504) and the controller (505) arranged on the intake port (501), the pressure sensor, the electric control valve (504) and the controller (505) are electrically connected.
4. The production process of a polyester anti-pasting bag needle-punched felt according to claim 3, wherein the control steps of the anti-reset mechanism are as follows, S11, the mounting plate (34) is pressed against the force plate (33 ), the pressure sensor sends the detected pressure signal to the controller (505);

   S12. The controller (505) disconnects the electric control valve (504) through the pressure signal, and at this time, the air chamber (50) is in a one-way conduction state;

   S13. The force plate (33) squeezes the first spring (35), and pushes the first piston (32), so that the hydraulic oil in the force cylinder (31) flows to the return cylinder (40), and the second piston (41) Under the action of the hydraulic oil, after overcoming the resistance of the second spring (42), the rod of the second piston (41) is pushed to move, so that the sealing plate (51) moves into the air chamber (50), and the air chamber (50) The gas is discharged from the one-way valve (503) on the exhaust port (502) until the sealing plate (51) stops moving. During this process, the air chamber (50) is always in a sealed state and does not communicate with the external air pressure. The air pressure in the air chamber (50) is lower than the atmospheric pressure, so that the position of the sealing plate (51) is always in a balanced state;

   S14, the mounting plate (34) breaks away from the extrusion of the force plate (33), that is, the pressure detected by the pressure sensor disappears, and the controller (505) opens the electric control valve (504), at this time the The air chamber (50) is in a two-way conduction state, the gas can flow from the electric control valve (504) to the air chamber (50), the air pressure in the air chamber (50) gradually tends to balance with the atmospheric pressure, and the second spring (42) The sealing plate (51) is pulled back and reset; the hydraulic oil flows back to the stressed cylinder (31) from the oil return cylinder (40), and the first spring (35) resets.
5. The production process of polyester anti-paste bag needle felt according to claim 3, characterized in that, the air chamber (50) is also provided with an inner support mechanism for limiting the limit movement of the sealing plate (51) distance, the inner support mechanism includes an inner chamber (60), an adjustment plate (61), an adjustment rod (62), a return spring (63) and an inner baffle (64) arranged in the air chamber (50). One end facing the sealing plate (51) has a chute extending inwardly, a cover plate is arranged on the port of the chute, the adjusting plate (61) is slidably arranged in the chute, and the adjusting rod (62) One end is set on the adjustment plate (61), the other end is set through the cover plate, the inner baffle (64) is set on the extended end of the adjustment rod (62), and the return spring (63) is sleeved on the adjustment on the rod(62).
6. The production process of a polyester anti-sticking bag needle felt according to claim 5, wherein the internal support mechanism also includes a pressure regulator arranged in the inner chamber (60), and the pressure regulator includes The permanent magnet (70) arranged on the adjustment plate (61) and facing away from the adjustment rod (62), the electromagnet (71) arranged on the inner wall of the air chamber (50) and facing the permanent magnet (70) ) and the second pressure sensor (72) that is arranged on the inner baffle (64) and facing the sealing plate (51), and the magnetic pole of the permanent magnet (70) is set to the electromagnet (71) after electrification To repel each other, the electromagnet (71) and the second pressure sensor (72) are electrically connected to the controller (505).
7. The production process of a polyester anti-sticking bag needle felt according to claim 6, wherein the internal pressure control step of the internal support mechanism is as follows, when the pressure value detected by the first pressure sensor (52), And when the detected pressure value gradually decreases and tends to a constant value, the constant value is greater than zero, the inner support mechanism does not block the sealing plate (51), and the controller (505) controls the pressure on the electromagnet (71). The current of the electromagnetic coil is 0;

   When the pressure value detected by the first pressure sensor (52) is constant or increases gradually, and when the pressure is detected by the second pressure sensor (72), the controller (505) needs to ) the detected pressure value, make the current matched with the pressure value pass through the electromagnetic coil on the electromagnet (71), make the electromagnet (71) generate corresponding repulsive force, and repel the permanent magnet (70) , to block the sealing plate (51).

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