Online chain clamp cleaning device and using method thereof

Abstract

The invention discloses an online chain clamp cleaning device and a using method thereof, and aims to overcome the defects that in the prior art, oligomer is easily attached to a chain clamp of a stretcher, the oligomer forms dirt on the surface of the chain clamp, the dirt randomly falls on a film, and then the quality of the film is affected. The technical problem is solved through the following technical scheme that the chain comprises two symmetrically-arranged chains, and chain clamps are regularly arranged on the chains; inner rails are arranged in the opposite directions of the two chains, and outer rails are arranged in the opposite directions of the two rails; a forced cleaning device is arranged on the edge back on to the rail and cleans the chain clamp. By arranging the compressed air dust removal device, the combustion dust removal device and the dry ice dust removal device, dirt on the chain clamp can be effectively removed, so that the dirt can be prevented from falling on a thin film when the thin film is stretched, and the product quality is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of film stretching, and more particularly to an online chain clamp cleaning device and method. Background Art

[0002] Biaxially oriented films require a heated oven chain clamp system to process the films. Chain clamps are used to clamp the thick film on both sides of the oven entrance and bring it into the oven for heating. The heated film is stretched transversely to achieve the purpose of widening. The widened film is then heat-set and cooled to complete the transverse stretching process, and then enters the next process.

[0003] However, in the horizontal stretching machine, due to the relatively high temperature, generally the high temperature zone is between 210 and 250 degrees. On the one hand, the polyester film itself contains a small amount of oligomers, which will be released from the film in the form of gas. On the other hand, the polyester film dropped into the oven will also be degraded under the conditions of long-term high-temperature baking to form low-molecular substances, which exist in the form of gas at high temperatures.

[0004] The temperature of the chain clamps just entering the oven is low. When low molecular weight substances encounter the relatively low temperature chain clamps, they will adhere to the surface of the chain clamps. Over time, a thick layer of dirt and foreign matter will gradually form and fall off randomly. When these dirt and foreign matter fall on the film, they will contaminate the film and reduce the quality of the product.

[0005] For example: Chinese patent publication number CN105252752A, publication date January 20, 2016, the name of the invention is an overfeed film stretching process, and the application discloses an overfeed film stretching process. When the clamp in the above patent document is in use, it is easy for dirt to adhere to the clamp, which reduces the quality of the film product. Summary of the invention

[0006] The present invention overcomes the shortcomings of the prior art that the chain clamps of the stretching machine are easily attached with oligomers, the oligomers form dirt on the surface of the chain clamps, the dirt randomly falls on the film, and thus affects the quality of the film. An online chain clamp cleaning device is provided, which can clean the dirt on the chain clamps when the stretching machine is working, thereby cleaning the chain clamps during normal production work, without stopping for maintenance, and will not affect production.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions: an online chain clamp cleaning device, characterized in that it includes: two symmetrically arranged chains, on which chain clamps are regularly arranged; the facing direction of the two chains is the inner track, and the back-to-back direction of the two tracks is the outer track; a forced cleaning device is provided on the edge of the back-to-back track, and the forced cleaning device cleans the chain clamps.

[0008] In the present invention, by arranging a compressed air dust removal device, a combustion dust removal device and a dry ice dust removal device, the dirt on the chain clamp can be effectively removed, thereby preventing the dirt from falling on the film when the film is stretched, thereby preventing the production quality of the film; and the present invention cleans the chain clamp without affecting the normal operation of the stretching machine, thereby not affecting normal production.

[0009] Preferably, the forced cleaning device includes a compressed air dust removal device, which includes a compressed purge air pipe, on which a purge pressure regulating valve for controlling the airflow pressure and a purge air valve for controlling the airflow interruption are provided, and the exhaust port of the compressed purge air pipe faces the chain clamp.

[0010] Compressed air is ejected from the compressed air dust removal nozzle along the compressed purge air pipe to clean the dirt on the chain clip.

[0011] Preferably, the forced cleaning device includes a combustion dust removal device, which includes a gas pipeline, a gas valve and a gas pressure regulating valve for controlling the on and off of gas management, and an electronic igniter is provided at the gas outlet end of the gas pipeline.

[0012] The gas is ejected along the gas pipeline, and the electronic igniter is ignited to ignite the gas, so that the combustion dust removal nozzle sprays fire to burn and remove the dirt on the chain clip.

[0013] Preferably, the forced cleaning device also includes a dry ice dust removal device, including a dry ice storage box, wherein the inner cavity of the dry ice storage box is provided with dry ice; a compressed air pipeline is provided through the dry ice storage box, and the compressed air pipeline is connected to the inner cavity of the dry ice storage box.

[0014] The compressed air is sprayed out of the compressed air pipe, and the dry ice can fall into the compressed air pipe, so that the dry ice can be sprayed outward. The sprayed dry ice acts on the chain clip, so that the dirt on the chain clip is removed. At the same time, the dry ice is used to cool the chain clip, so that the dirt can fall off the chain clip more easily.

[0015] Preferably, the forced cleaning device further comprises a lifting baffle, and the compressed purge air pipe is arranged through the lifting baffle.

[0016] Through the action of the lifting baffle, the lifting baffle can drive the compression purge air pipe, the gas pipeline and the compressor pipe to rise or fall, so that the compression purge air pipe, the gas pipeline and the compressor pipe can clean the chain clamp more comprehensively when cleaning the chain clamp.

[0017] Preferably, a chain clamp shell cover is arranged outside the chain clamp, and the chain clamp shell cover cooperates with the lifting baffle.

[0018] The chain clip shell cover also cooperates with the lifting baffle, so that the chain clip is in a certain range of space, which can prevent dirt from flying around when cleaning and is beneficial to environmental protection.

[0019] Preferably, it also includes an air intake fan and an air exhaust fan arranged on the chain clip housing cover.

[0020] The exhaust fan and the exhaust fan cooperate to form a circulating airflow in the chain clamp housing cover, so that the dust generated by the above-mentioned forced cleaning device can be taken away, which can not only have a dust removal effect, but also have a role in cooling the chain clamp.

[0021] A method for using an online chain clip cleaning device comprises the following steps: Step 1: Dry ice decontamination, compressed air pipeline jet, drive dry ice to spray dry ice particles onto the chain clamp, decontaminating the chain clamp and cooling the chain clamp at the same time; Step 2: Ignite the electronic igniter, and use the gas pipe to spray fire to burn off the remaining dirt on the chain clip; Step 3: Compress the purge air pipe and blow air to remove the remaining dirt on the chain clamp.

[0022] In the above process, in order to achieve a better decontamination effect on the chain clamp, firstly, decontamination is performed by dry ice, and compressed air is sprayed out of the compressed air pipe. The negative pressure generated by the compressed air sucks the dry ice into the compressed air pipeline, so that the dry ice can be sprayed outward, and the sprayed dry ice acts on the chain clamp, so that the dirt on the chain clamp is removed. At the same time, the chain clamp is cooled by dry ice, so that the dirt can fall off the chain clamp more easily. Then, an electronic igniter is used to ignite the gas, so that the combustion dust removal nozzle sprays fire to burn and remove the dirt on the chain clamp. Finally, compressed air is sprayed from the compressed air dust removal nozzle to clean the dirt on the chain clamp, so that the dirt on the chain clamp can be completely cleaned.

[0023] Preferably, the combustion dust removal device and the compressed air dust removal device are arranged at one end where the outer track enters the inner track.

[0024] Since the compressed air dust removal device, the combustion dust removal device and the compressed air dust removal device are arranged on the side where the outer track is about to enter the inner track, the combustion dust removal device burns and heats the chain clamp. After the compressed air dust removal device finishes cleaning the chain clamp, residual heat is still retained on the chain clamp. The temperature of the chain clamp is measured by an infrared thermometer, and the blowing time of the compressed air dust removal device is controlled to make the temperature of the chain clamp lower than that of the oven by between 10 degrees Celsius and 20 degrees Celsius. This means that when the chain clamp enters the oven, the temperature difference with the oven is not very large, which can effectively prevent the oligomers from being deposited on the surface of the chain clamp due to the low temperature of the chain clamp entering the oven.

[0025] Compared with the prior art, the beneficial effect of the present invention is that by arranging a compressed air dust removal device, a combustion dust removal device and a dry ice dust removal device, the dirt on the chain clamp can be effectively removed, thereby preventing the dirt from falling on the film when the film is stretched, thereby affecting the production quality of the film. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a top view of the present invention; Figure 2 It is a schematic diagram of the specific structure of the cleaning device of the present invention; Figure 3 is a schematic diagram of a dry ice cleaning device of the present invention; Figure 4 is a side view of the lifting baffle and the chain clip housing cover of the present invention; In the figure: 1, chain, 11, inner track, 111, first inner track, 112, second inner track, 113, third inner track, 12, outer track; 2. Chain clip; 3. Compressed air dust removal device, 31. Compressed purge air pipe, 32. Purge pressure regulating valve, 33. Purge air valve; 4. Combustion dust removal device, 41. Gas pipeline, 42. Gas valve, 43. Gas pressure regulating valve, 44. Electronic igniter; 5. Dry ice dust removal device, 51. Dry ice storage box, 52. Dry ice storage chamber, 53. Compressed air pipeline; 6. Chain clamp shell cover, 61. Lifting baffle, 62. Exhaust fan, 63. Inlet fan. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings: Example 1: Reference Figures 1 to 4As shown, an online chain clamp cleaning device comprises: two symmetrically arranged chains 1, on which chain clamps 2 are regularly arranged; the facing direction of the two chains 1 is an inner track 11, and the back direction of the two tracks is an outer track 12; the inner track 11 comprises a first inner track 111, a second inner track 112 and a third inner track 113 connected in sequence, the first inner tracks 11 of the two chains 1 are parallel to each other, the second inner tracks 112 of the two chains 1 are parallel to each other, the spacing between the first inner tracks 111 of the two chains 1 is smaller than the spacing between the third inner tracks 113, and the second inner tracks 112 on the two chains 1 are arranged in an "eight" shape; both sides of the film are firstly clamped by the chain clamps on the first inner tracks 111 of the two chains 1 respectively, and the movement of the chain 1 drives the film to move, and when the film passes through the second inner track 112, the chain clamps on both sides of the film gradually stretch the film, and then the stretched film enters the third track, and after the film maintains the stretched state for a period of time while moving on the third track, the chain clamps at both ends of the film are released, and the film processing is completed. The inner track 11 of the chain 1 is arranged in the oven, and plays a role in heating the film during the film stretching process, so that the film can be stretched more easily.

[0028] A forced cleaning device is arranged on the edge facing away from the track, and the forced cleaning cleans the chain clip. The forced cleaning device mainly includes a compressed air dust removal device 3, a combustion dust removal device 4 and a dry ice dust removal device 5.

[0029] The compressed air dust removal device 3 includes a compressed purge air pipe 3131, which is connected to an air compressor. The compressed purge air pipe 31 is provided with a purge pressure regulating valve 32 for controlling the air flow pressure, and is also provided with a purge air valve 33 for controlling the air flow interruption. The end of the compressed purge air pipe 31 is provided with a compressed air dust removal nozzle, which faces the chain clamp, and compressed air is sprayed from the compressed air dust removal nozzle to clean the dirt on the chain clamp. The distance between the compressed air dust removal nozzle and the end face of the chain clamp is preferably 5 mm to 10 mm. If the distance is too close, it is easy to hit the chain clamp. If the distance is too far, the air flow velocity sprayed from the compressed air dust removal nozzle is reduced, and the dust removal effect will be reduced.

[0030] The combustion dust removal device 4 includes a gas pipeline 41, on which a gas valve 42 and a gas pressure regulating valve 43 for controlling the on and off of gas management are arranged, and a combustion dust removal nozzle and an electronic igniter 44 are arranged at the gas outlet end of the gas pipeline 41. Gas is ejected from the combustion dust removal nozzle, and the electronic igniter 44 ignites the gas, so that the combustion dust removal nozzle sprays fire to burn and remove the dirt on the chain clamp. The combustion dust removal nozzle is preferably 10 mm to 20 mm away from the end face of the chain clamp. A too close distance is not conducive to the mixing of gas and air, which reduces the combustion efficiency and further affects the dust removal effect. A too far distance will reduce the temperature of the clamp surface and also reduce the dust removal effect.

[0031] The dry ice dust removal device 5 includes a dry ice storage box 51, a dry ice storage chamber 52 is provided in the dry ice storage, and dry ice is provided in the dry ice storage chamber 52; a compressed air pipeline 53 is provided in the dry ice storage box 51, and the compressed air pipeline 53 is provided at the lower part of the dry ice dust removal chamber, and the compressed air pipeline 53 is connected with the inner cavity of the dry ice storage box 51; the compressed air pipe sprays compressed air, and the dry ice falls into the compressed air pipe. The dry ice can be sprayed outward by the force of the compressed air, and the sprayed dry ice acts on the chain clamp, so that the dirt on the chain clamp is removed, and the chain clamp is cooled by the dry ice, so that the dirt can fall off the chain clamp more easily. In addition, the compressed air pipeline is provided with a valve for controlling the on-off of the controller and a regulating valve for controlling the pressure. The dry ice dust removal nozzle is preferably 10 mm to 20 mm away from the end face of the chain clamp. A too close distance may cause the dry ice to be blocked between the nozzle and the chain clamp, and a too far distance will cause the speed of spraying dry ice to decrease, resulting in a decrease in the dust removal effect.

[0032] The compressed air dust removal device 3, the combustion dust removal device 4 and the dry ice dust removal device 5 can be used alone or in combination of any two or three according to actual conditions. Cleaning the chain clamp can also be used in combination. In the present invention, by providing the compressed air dust removal device 3, the combustion dust removal device 4 and the dry ice dust removal device 5, the dirt on the chain clamp can be effectively removed, thereby preventing the dirt from falling on the film when the film is stretched, thereby affecting the production quality of the film; and the present invention cleans the chain clamp without affecting the normal operation of the stretching machine, thereby not affecting normal production.

[0033] Example 2: Reference Figures 1 to 4 As shown, an online chain clamp cleaning device comprises: two symmetrically arranged chains 1, on which chain clamps 2 are regularly arranged; the facing direction of the two chains 1 is an inner track 11, and the back direction of the two tracks is an outer track 12; the inner track 11 comprises a first inner track 111, a second inner track 112 and a third inner track 113 connected in sequence, the first inner tracks 11 of the two chains 1 are parallel to each other, the second inner tracks 112 of the two chains 1 are parallel to each other, the spacing between the first inner tracks 111 of the two chains 1 is smaller than the spacing between the third inner tracks 113, and the second inner tracks 112 on the two chains 1 are arranged in an "eight" shape; both sides of the film are firstly clamped by the chain clamps on the first inner tracks 111 of the two chains 1 respectively, and the movement of the chain 1 drives the film to move, and when the film passes through the second inner track 112, the chain clamps on both sides of the film gradually stretch the film, and then the stretched film enters the third track, and after the film maintains the stretched state for a period of time while moving on the third track, the chain clamps at both ends of the film are released, and the film processing is completed. The inner track 11 of the chain 1 is arranged in the oven, and plays a role in heating the film during the film stretching process, so that the film can be stretched more easily.

[0034] A forced cleaning device is arranged on the edge facing away from the track, and the forced cleaning cleans the chain clip. The forced cleaning device mainly includes a compressed air dust removal device 3, a combustion dust removal device 4 and a dry ice dust removal device 5.

[0035] The compressed air dust removal device 3 includes a compressed purge air pipe 3131, which is connected to an air compressor. The compressed purge air pipe 31 is provided with a purge pressure regulating valve 32 for controlling the air flow pressure, and is also provided with a purge air valve 33 for controlling the air flow interruption. The end of the compressed purge air pipe 31 is provided with a compressed air dust removal nozzle, which faces the chain clamp, and compressed air is sprayed from the compressed air dust removal nozzle to clean the dirt on the chain clamp. The distance between the compressed air dust removal nozzle and the end face of the chain clamp is preferably 5 mm to 10 mm. If the distance is too close, it is easy to hit the chain clamp. If the distance is too far, the air flow velocity sprayed from the compressed air dust removal nozzle is reduced, and the dust removal effect will be reduced.

[0036] The combustion dust removal device 4 includes a gas pipeline 41, on which a gas valve 42 and a gas pressure regulating valve 43 for controlling the on and off of gas management are arranged, and a combustion dust removal nozzle and an electronic igniter 44 are arranged at the gas outlet end of the gas pipeline 41. Gas is ejected from the combustion dust removal nozzle, and the electronic igniter 44 ignites the gas, so that the combustion dust removal nozzle sprays fire to burn and remove the dirt on the chain clamp. The combustion dust removal nozzle is preferably 10 mm to 20 mm away from the end face of the chain clamp. A too close distance is not conducive to the mixing of gas and air, which reduces the combustion efficiency and further affects the dust removal effect. A too far distance will reduce the temperature of the clamp surface and also reduce the dust removal effect.

[0037] The dry ice dust removal device 5 includes a dry ice storage box 51, a dry ice storage chamber 52 is provided in the dry ice storage, and dry ice is provided in the dry ice storage chamber 52; a compressed air pipeline 53 is provided in the dry ice storage box 51, and the compressed air pipeline 53 is provided inside the dry ice dust removal chamber, and the compressed air pipeline 53 is connected with the inner cavity of the dry ice storage box 51; the compressed air pipe sprays compressed air, and the negative pressure generated by the compressed air sucks the dry ice into the compressed air pipeline 53, so that the dry ice can be sprayed outward, and the sprayed dry ice acts on the chain clamp, so that the dirt on the chain clamp is removed, and the chain clamp is cooled by the dry ice, so that the dirt can be more easily removed from the chain clamp. In addition, the compressed air pipeline is provided with a valve for controlling the on-off of the controller and a regulating valve for controlling the pressure thereof, and the dry ice dust removal nozzle is preferably 10 mm to 20 mm away from the end face of the chain clamp. A too close distance may cause the dry ice to be blocked between the nozzle and the chain clamp, and a too far distance may cause the speed of spraying dry ice to be reduced, so that the dust removal effect is reduced.

[0038] A chain clip housing 6 is provided outside the chain clip, a lifting baffle 61 is provided at the opening of the chain clip housing 6, a lifting device is provided at the bottom of the lifting baffle 61, and the lifting device controls the lifting baffle 61 to rise or fall. The lifting device can be provided by a cylinder or other existing structures. The chain clip housing 6 and the lifting baffle 61 match and wrap the circumferential direction of the chain clip.

[0039] The compression purge air pipe 31, the gas pipeline 41 and the compressor pipeline in this embodiment are all passed through the lifting baffle 61. Through the action of the lifting baffle 61, the lifting baffle 61 can drive the compression purge air pipe 31, the gas pipeline 41 and the compressor pipe to rise or fall, so that the compression purge air pipe 31, the gas pipeline 41 and the compressor pipe can clean the chain clamp more comprehensively when cleaning the chain clamp.

[0040] In addition, an air intake fan 63 and an exhaust fan 62 are provided on the chain clamp housing cover 6. The exhaust fan 62 and the exhaust fan 62 cooperate to form a circulating airflow in the chain clamp housing cover 6, so that the dust generated by the above-mentioned forced cleaning device can be taken away, which can not only have a dust removal effect, but also can play a role in cooling the chain clamp.

[0041] Embodiment 3: A method for using an online chain clip cleaning device, using an online chain clip cleaning device in the above-mentioned embodiment 1 or embodiment 2, a compressed air dust removal device 3, a combustion dust removal device 4 and a compressed air dust removal device 3 are arranged on the side where the outer track 12 is about to enter the inner track 11; specifically comprising the following steps: Step 1: Dry ice decontamination, compressed air pipeline 53 jets air, driving dry ice to spray dry ice particles onto the chain clamp, decontaminating the chain clamp while cooling the chain clamp; Step 2: The electronic igniter 44 is ignited, and the gas pipe sprays fire to burn away the dirt remaining on the chain clip; Step 3: Compress and blow air through the purge air pipe 31 to remove the remaining dirt on the chain clamp.

[0042] In the above process, in order to achieve a better cleaning effect on the chain clamp, firstly, dry ice is used for cleaning, and compressed air is sprayed out of the compressed air pipe. The negative pressure generated by the compressed air sucks the dry ice into the compressed air pipeline 53, so that the dry ice can be sprayed outward, and the sprayed dry ice acts on the chain clamp, so that the dirt on the chain clamp is removed. At the same time, the chain clamp is cooled by dry ice, so that the dirt can fall off the chain clamp more easily. Then, the electronic igniter 44 is used to ignite the gas, so that the combustion dust removal nozzle sprays fire to burn and remove the dirt on the chain clamp. Finally, compressed air is sprayed from the compressed air dust removal nozzle to clean the dirt on the chain clamp, so that the dirt on the chain clamp can be completely cleaned.

[0043] In addition, in the present method, since the compressed air dust removal device 3, the combustion dust removal device 4 and the compressed air dust removal device 3 are arranged on the side where the outer track 12 is about to enter the inner track 11, the combustion dust removal device 4 burns and heats the chain clamp. After the compressed air dust removal device 3 completes cleaning of the chain clamp, residual heat is still retained on the chain clamp. The temperature of the chain clamp is measured by an infrared thermometer, and the blowing time of the compressed air dust removal device 3 is controlled to make the temperature of the chain clamp lower than the oven by between 10 degrees Celsius and 20 degrees Celsius (for example, there are generally three temperature levels in the oven, which are about 240 degrees, about 110 degrees and about 70 degrees, and the temperatures can be set accordingly so that the chain clamp is maintained at about 220 degrees, about 90 degrees and about 50 degrees respectively when entering the oven). This means that when the chain clamp enters the oven, the temperature difference with the oven is not very large, which can well prevent the oligomers from being deposited on the surface of the chain clamp due to the low temperature of the chain clamp entering the oven.

[0044] The above-described embodiments are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. An online chain clip cleaning device, characterized in that: include: Two symmetrically arranged chains have chain clips arranged regularly on them; the direction in which the two chains face each other is the inner track, and the direction in which the two tracks face away from each other is the outer track; a forced cleaning device is arranged on the edge of the away track to clean the chain clips.

2. The online chain clip cleaning device according to claim 1 is characterized in that: The forced cleaning device includes a compressed air dust removal device, which includes a compressed purge air pipe. The compressed purge air pipe is provided with a purge pressure regulating valve for controlling the airflow pressure and a purge air valve for controlling the airflow interruption. The exhaust port of the compressed purge air pipe faces the chain clamp.

3. The online chain clip cleaning device according to claim 2 is characterized in that: The forced cleaning device includes a combustion dust removal device, which includes a gas pipeline, a gas valve and a gas pressure regulating valve for controlling the on and off of gas management, and an electronic igniter is arranged at the gas outlet end of the gas pipeline.

4. The online chain clip cleaning device according to claim 3 is characterized in that: The forced cleaning device also includes a dry ice dust removal device, including a dry ice storage box, the inner cavity of the dry ice storage box is provided with dry ice; a compressed air pipeline is arranged through the dry ice storage box, and the compressed air pipeline is connected to the inner cavity of the dry ice storage box.

5. The online chain clip cleaning device according to claim 2, characterized in that: The forced cleaning device also includes a lifting baffle, and the compressed purge air pipe is arranged through the lifting baffle.

6. The online chain clip cleaning device according to claim 5, characterized in that: A chain clamp shell cover is arranged outside the chain clamp, and the chain clamp shell cover matches with the lifting baffle.

7. The online chain clip cleaning device according to claim 6 is characterized in that: It also includes an air inlet fan and an air exhaust fan which are arranged on the chain clip housing cover.

8. A method for using an online chain clip cleaning device, using the online chain clip cleaning device as claimed in claim 4, characterized in that: The following steps are involved: Step 1: Dry ice decontamination, compressed air pipeline jet, drive dry ice to spray dry ice particles onto the chain clamp, decontaminating the chain clamp and cooling the chain clamp at the same time; Step 2: Ignite the electronic igniter, and use the gas pipe to spray fire to burn off the remaining dirt on the chain clip; Step 3: Compress the purge air pipe and blow air to remove the remaining dirt on the chain clamp.

9. The method for using the online chain clip cleaning device according to claim 8, characterized in that: The combustion dust removal device and the compressed air dust removal device are arranged at one end where the outer track enters the inner track.

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