A sputtering method for PVC plastic pipe

Abstract

The present invention belongs to the technical field of magnetron sputtering, and specifically is a sputtering method for PVC plastic pipes, comprising a base plate, a sputtering box and a motor; the base plate is fixedly connected to one side of the sputtering box; a symmetrically designed support plate is fixedly connected to the upper surface of the base plate away from the sputtering box; two symmetrically designed support plates are rotatably connected to opposite sides with traction rollers; the number of the traction rollers is two and they are arranged vertically; the base plate is located between the support plate and the sputtering box and is fixedly connected to a rotating box; the interior of the rotating box is hollow; a conducting groove is provided at the center of the two traction rollers; the present invention uses traction rollers and a rotating box to make the pipe rotate while moving forward, so that the sputtering process of the pipe can be carried out continuously, which effectively speeds up the efficiency of the sputtering process of the pipe and reduces the operating steps of the sputtering work, and at the same time, the continuous sputtering combined with the rotation of the pipe itself can effectively make the thickness of the coating formed on the surface of the pipe more uniform.

Description

Technical Field

[0001] The invention belongs to the technical field of magnetron sputtering, in particular to a sputtering method for PVC plastic pipes. Background Art

[0002] In the prior art, when long plastic pipes are subjected to surface sputtering treatment, most of them are treated in a segmented operation mode. During the segmented sputtering process, it is very easy to cause overlapping of the coating or the existence of coating gaps between the segments, which leads to uneven coating thickness on the surface of the pipe, resulting in poor coating uniformity. At the same time, the segmented sputtering also has the defects of poor efficiency and too many operating steps. At the same time, since the pipe is a non-planar body, annular targets are mostly used for sputtering, and then the curved surface of the pipe is uniformly coated. Since there is a certain difference in the magnetic field in the gap between the annular target and the workpiece holder, it is easy to cause a certain thickness difference of the coating on the curved surface of the pipe during the sputtering process, and then the overall uniformity of the coating is low, affecting the protective effect of the coating on the pipe.

[0003] A plastic pipe sputtering system published in a Chinese patent, application number: 2018109890647, includes a sputtering box, a workpiece rack, a motor, a target module, a heater and an automatic cleaning module, the motor is fixed on the outside of the sputtering box; the workpiece rack is located in the center of the sputtering box, and the workpiece rack is driven to rotate by the motor; the target module is installed on the inner wall of the sputtering box, and the target module can move up and down and move horizontally close to the workpiece rack; the automatic cleaning module is used to clean the sputtering box before sputtering; the heater is located at the upper end of the inner wall of the sputtering box, and the heater is used to dry the sputtering box after cleaning; the invention makes the automatic cleaning The module sprays water into the sputtering box for cleaning, which is beneficial to improving the efficiency of the entire plastic pipe sputtering process; the workpiece holder is driven by a motor to rotate so that the plastic pipe is evenly sputtered, and the target module is moved up and down or laterally so that the plastic pipe is evenly sputtered, thereby improving the sputtering quality of the plastic pipe. However, when sputtering the pipe in this invention, the lateral and up and down movements cause little change in the angle of the pipe, and the outer wall of the pipe is curved. During the sputtering process, the coating deposited on the surface of the pipe is not uniform enough. At the same time, the pipe in this solution is sputtered in sections, which is inconvenient to sputter on the surface of a longer pipe.

[0004] In view of this, the present invention develops a sputtering method for PVC plastic pipes to solve the above technical problems. Summary of the invention

[0005] In order to make up for the shortcomings of the prior art and solve the problem that it is inconvenient to perform segmented operation during surface sputtering of long plastic pipes in the prior art, which easily leads to overlapping of coatings or gaps in coatings, the present invention proposes a sputtering method for PVC plastic pipes.

[0006] The technical solution adopted by the present invention to solve the technical problem is: a sputtering method for PVC plastic pipes according to the present invention comprises the following steps:

[0007] S1: After wiping the surface of the plastic pipe with a fine gauze, the plastic pipe is passed into a magnetron sputtering device, and the pulling roller in the magnetron sputtering device is controlled to pull the plastic pipe forward slowly at a rate of 30-50 cm / min;

[0008] S2: Control the heating lamp in the magnetron sputtering device to heat up to 45-60°C, heat and degas the surface of the plastic pipe during the forward process, and polish the surface of the plastic pipe with the friction plate at the same time;

[0009] S3: The sputtering box is evacuated and argon gas is introduced after evacuation. The target material is used as the cathode, and the plastic pipe and the workpiece holder are used as the anode to conduct vacuum sputtering operation. During the sputtering operation, the plastic pipe is continuously rotated to make the sputtering operation more uniform.

[0010] The magnetron sputtering device described in S1 includes a base plate, a sputtering box and a motor; the base plate is fixedly connected to one side of the sputtering box; a symmetrically designed support plate is fixedly connected to the upper surface of the base plate away from the sputtering box; the two symmetrically designed support plates are rotatably connected to the opposite sides with traction rollers; the number of traction rollers is two and they are arranged vertically in parallel; the base plate is located between the support plate and the sputtering box and is fixedly connected to a rotating box; the interior of the rotating box is hollow; a conducting groove is opened at the center of the two traction rollers in the rotating box; a guide sleeve is rotatably connected in the conducting groove; the guide sleeve extends to the inner cavity of the rotating box; the guide sleeve is inlaid with evenly distributed heating lamps; the guide sleeve is located in the inner cavity of the rotating box and is fixedly connected to a gear ring; the inner cavity of the rotating box is located on one side of the gear ring and is rotatably connected to a bevel gear set through a guide rod; the bevel gear set is meshed with the gear ring; the bevel gear set passes through the rotating box away from the gear ring; the motor is fixedly connected to one side of the rotating box; the The output shaft of the motor is fixedly connected to the bevel gear set at one end outside the rotating box; the output shaft of the motor is located outside the rotating box and is connected to an auxiliary wheel; the traction roller at the lower end is sleeved with a driven wheel; the auxiliary wheel and the driven wheel are connected by a belt; a one-way groove is opened at the corresponding conduction groove of the sputtering box; the one-way groove and the conduction groove are connected by a sealing tube; the inner wall of the sealing tube is threaded; a plurality of threaded tubes are meshed and connected in the sealing tube; the sputtering box is a cubic circular cavity structure; a target material module is fixedly connected to the side wall of the sputtering box; the sputtering box is fixedly connected to a workpiece rack corresponding to the one-way groove; the one-way groove penetrates the sputtering box at one end away from the sealing tube; the one-way groove is fixedly connected to a discharge pipe at one end away from the sealing pipe; the inner wall of the threaded tube and the inner wall of the discharge pipe are both fixedly connected with sealing members; the sealing member is formed by mutually fixedly connecting an elastic rubber sheet and an elastic metal sheet; in the initial state, the sealing member is conical and blocks the threaded tube and the discharge pipe;

[0011] During operation, in the prior art, when performing surface sputtering treatment on long plastic pipes, most of them are processed in a segmented operation mode. In the process of segmented sputtering, it is very easy to cause overlapping of coatings or gaps between coatings between segments, which leads to uneven coating thickness on the surface of the pipe, resulting in poor coating uniformity. At the same time, segmented sputtering also has the defects of poor efficiency and too many operation steps. At the same time, since the pipe is a non-planar body, annular targets are often used for sputtering, so as to perform uniform coating treatment on the curved surface of the pipe. Since there is a certain difference in the magnetic field in the gap between the annular target and the workpiece holder, it is easy to cause the coating on the curved surface of the pipe to be uneven during the sputtering process. There is a certain thickness difference, which makes the overall uniformity of the coating low, affecting the protective effect of the coating on the pipe. By setting a traction roller and a rotating box, the rotation of the motor drives the bevel gear set fixedly connected to the motor output shaft to rotate, and then the transmission of the bevel gear set drives the gear ring to rotate. Since the gear ring is fixedly connected to the guide sleeve, the rotating gear ring drives the guide sleeve to rotate. At the same time, the auxiliary wheel sleeved on the output shaft of the motor drives the driven wheel to rotate under the transmission action of the belt, and then the traction roller at the lower end fixedly connected to the driven wheel rotates. When the traction roller rotates, it drives the pipe to move in the direction of the guide groove, and after the pipe enters the guide sleeve, the guide sleeve and the pipe are used to rotate. The friction between the walls drives the pipe to rotate as it moves forward. At the same time, the heating lamp embedded in the guide sleeve heats the surface of the pipe, thereby increasing the surface temperature of the pipe and removing water vapor and gas on the surface of the pipe. At the same time, since the pipe is rotated by friction, there is a certain difference in the rotation rate between the pipe and the guide sleeve, so that the guide sleeve performs preliminary grinding on the surface of the pipe to remove impurities attached to the pipe. The continuously moving pipe enters the sealing tube and squeezes the seal during the movement to open the seal, so that the pipe enters the sputtering box. Under the action of electricity in the sputtering box, the glow discharge principle is used to bombard the target with argon atoms, thereby causing the target to The metal atoms on the pipe are blasted out and deposited on the surface of the pipe under the action of the magnetic field to form a coating. By using traction rollers and rotating boxes, the pipe rotates while moving forward, so that the coating formed on the pipe in the sputtering box is more uniform. At the same time, the seal is tightly attached to the pipe during the process of the pipe moving forward and rotating, thereby effectively enhancing the sealing performance of the sputtering box and ensuring the sealing performance of the pipe during movement, so that the sputtering process of the pipe can be carried out continuously. On the one hand, it effectively speeds up the efficiency of the sputtering treatment of the pipe and reduces the operating steps of the sputtering work. At the same time, continuous sputtering combined with the rotation of the pipe itself can also effectively make the thickness of the coating formed on the surface of the pipe more uniform.

[0012] Preferably, a symmetrically designed first slide groove is provided on opposite sides of the support plate; the traction rollers are slidably connected to the first slide groove through springs; the center of the symmetrically designed first slide groove corresponds to the axis of the guide groove; during operation, due to certain differences in the diameters of the pipes, the traction rollers are slidably connected to the first slide groove by setting the first slide groove, and the center of the symmetrically designed first slide groove corresponds to the axis of the guide groove, which can effectively make the axis of the pipe clamped by the two traction rollers automatically align with the axis of the guide groove, thereby facilitating continuous traction of the pipe.

[0013] Preferably, both ends of the traction roller pass through the first slide groove; the two support plates are fixedly connected to a control disk on opposite sides; the control disk is provided with a first through groove; the first through groove passes through the control disk; the first through groove is rotatably connected to a limiting wheel; both ends of the traction roller are rotatably connected to a limiting plate; the limiting plates are of "L"-shaped design; the limiting plates are extended into the first through groove; the side of the limiting plate close to the limiting wheel is of rack-shaped design; the control disk is provided with a limiting groove on the side away from the support plate; a rotating shaft is rotatably connected in the limiting groove; the rotating shaft passes through the control disk and extends into the first through groove; the rotating shaft is located in the first through groove. The end is fixedly connected with the limiting wheel; a rotating handle is sleeved on the rotating shaft; a meshing wheel is fixedly connected to the side of the rotating handle corresponding to the limiting groove; the meshing wheel matches the limiting groove; when working, by setting the control disk and the rotating handle, the rotating handle is slid outward on the rotating shaft, thereby disengaging the meshing wheel from the limiting groove, and manually rotating the rotating handle drives the rotating shaft to rotate, thereby rotating the limiting wheel fixedly connected to the rotating shaft, and the rotation of the limiting wheel drives the two symmetrical limiting plates to move toward or away from each other, thereby adjusting the distance between the two traction rollers, so that the traction roller and the pipe are fully contacted, and the rotating traction roller drives the pipe to move in the direction of the guide groove.

[0014] Preferably, the traction rollers are all sleeved with rubber sleeves; the rubber sleeves are all double-conical in design with large ends and small in the middle; during operation, the rubber sleeves are provided to make soft contact between the traction rollers and the pipes, which can effectively prevent damage to the pipes caused by pressure on the one hand, and at the same time, the rubber sleeves themselves have large friction, which can also prevent slipping between the pipes and the traction rollers, affecting the uniform speed operation of the pipes, and the double-conical design of the rubber sleeves can also effectively prevent the pipes from shifting during movement, resulting in misalignment of the pipe axis and the guide groove axis, thereby preventing the pipes from being damaged during operation.

[0015] Preferably, the inner wall of the guide sleeve is hinged with a clamping piece; the clamping piece is composed of a guide rod and a guide plate; the clamping piece is located on the inner wall of the guide sleeve and is arranged in a spiral shape; the clamping piece is tilted in the initial state; when working, the clamping piece is set, the hinged clamping piece is squeezed by the pipe, and the pipe is fixed by the clamping piece, so that the guide sleeve can adapt to pipes of different sizes, effectively avoiding the need to frequently replace guide sleeves of different sizes after the pipe diameter changes, affecting the production efficiency, and at the same time, the use of the clamping piece for clamping can also effectively form a gap between the pipe and the guide sleeve, which is convenient for the gas escaping from the heated pipe to diffuse outward.

[0016] Preferably, the one-way groove is located at the opening in the inner cavity of the sputtering box and is rotatably connected to a rotating ring; a plurality of friction plates are fixedly connected to the inner wall of the rotating ring; the friction plates are all arranged obliquely; during operation, the tube enters the inner cavity of the sputtering box through the one-way groove, and the tube contacts the friction plate during the process of self-rotation, thereby rubbing the surface of the tube to make the surface of the tube smoother, which is conducive to the deposition of the bombarded atoms on the surface of the tube to form a coating, and makes the bonding strength between the coating and the tube stronger, and at the same time, the friction plate is connected to the rotating ring, and the rotation of the rotating ring can also avoid damage to the tube when the friction between the friction plate and the tube is large.

[0017] Preferably, the rotating ring is fixedly connected to the workpiece rack; the workpiece rack is designed in a pipe-like shape; the surface of the workpiece rack is designed with uniform openings; the surface openings of the workpiece rack are designed in a strip shape; during operation, the pipe extends into the interior of the workpiece rack during the process of advancing, and the rotating ring is rotated by the friction between the pipe and the friction plate, and there is a difference in the rotation speeds of the rotating ring and the pipe, thereby causing differential rotation between the workpiece rack fixedly connected to the rotating ring and the pipe, thereby effectively preventing the workpiece rack from blocking the pipe and affecting the uniformity of the coating.

[0018] Preferably, the inner wall of the seal is fixedly connected with evenly distributed sealing rings; the diameter of the sealing ring decreases step by step; when working, the conical seal in the initial state is sleeved on the surface of the pipe under the pressure of the pipe, and the sealing rings are evenly distributed on the surface of the seal, so that the sealing effect between the seal and the pipe is made stronger.

[0019] Preferably, the sealing ring is hollow inside; an extrusion bag is fixedly connected between the sealing member and the threaded tube; the extrusion bag and the inner cavity of the sealing ring are connected through a conduit; when working, the tube exerts pressure on the sealing member, thereby causing the angle of the conical sealing member to change and wrap around the surface of the tube, and when the angle between the sealing member and the spiral tube wall changes, a pressurizing effect is exerted on the extrusion bag, thereby causing the extrusion bag to transport the internal gas to the sealing ring through the conduit, thereby causing the sealing ring to expand and enhance the sealing effect of the conical sealing member, and the sealing effect of the seal on the surface of the tube is enhanced by the tight fit between the expanded sealing ring and the tube.

[0020] Preferably, the plurality of threaded tubes are elastically connected to the sealing tube through a spring; the sealing tube is hinged with a tripod on one side of the threaded tube close to the sputtering box; the tripod is formed by two guide rods hinged to each other; the other end of the tripod is hinged to the threaded tube; in the initial state, the two guide rods in the tripod are distributed at an obtuse angle, forming a supporting effect on the seal; during operation, the tripod forms a supporting effect on the seal in the initial state, thereby making it impossible to open the seal, and the negative pressure formed by the vacuum in the sputtering box cannot open the seal at this time, when the pipe is transported into the spiral tube, the friction between the pipe and the seal drives the spiral tube to rotate, thereby making the spiral tube advance in the sealing tube, and in the process of advancing, the two guide rods of the tripod are distributed at an acute angle, thereby making the tripod rotatable, thereby making the angle of the seal changeable, and as the pipe continues to advance, the angle of the seal changes and covers the surface of the pipe.

[0021] Preferably, the threaded tube is designed in an arc shape on one side facing the tripod, so as to facilitate the extension of the tripod into the inner cavity of the threaded tube; when working, as the tripod is distributed at an acute angle, the tripod rotates under the extrusion effect of the tube and then extends into the threaded tube, and can also form an extrusion effect on the extrusion bag on the inner wall of the threaded tube, thereby enhancing the tendency of the gas in the extrusion bag to flow into the sealing ring.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1. The sputtering method for PVC plastic pipes described in the present invention uses traction rollers and a rotating box to make the pipe rotate while advancing, thereby making the coating formed on the pipe in the sputtering box more uniform. At the same time, the sealing member is tightly attached to the pipe during the advancement and rotation of the pipe, thereby effectively enhancing the sealing performance of the sputtering box and ensuring the sealing performance of the pipe during movement, thereby allowing the sputtering process of the pipe to continue. On the one hand, it effectively speeds up the efficiency of the sputtering treatment of the pipe and reduces the operating steps of the sputtering work. At the same time, the continuous sputtering combined with the rotation of the pipe itself can also effectively make the thickness of the coating formed on the surface of the pipe more uniform.

[0024] 2. The sputtering method for PVC plastic pipes described in the present invention forms pressure on the seal through the pipe, thereby changing the angle of the tapered seal and coating the pipe surface. When the angle between the seal and the spiral pipe wall changes, a pressurizing effect is formed on the extrusion bag, so that the extrusion bag transports the internal gas to the sealing ring through the conduit, thereby expanding the sealing ring to enhance the sealing effect of the tapered seal. The sealing effect of the seal on the pipe surface is enhanced by the close fit between the expanded sealing ring and the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] Figure 1 is a flow chart of the method of the present invention;

[0027] Figure 2 It is a partial structural diagram of the magnetron sputtering device;

[0028] Figure 3 yes Figure 2 A partial enlarged view of the middle part;

[0029] Figure 4 It is a partial transmission diagram of the magnetron sputtering device;

[0030] Figure 5 is a cross-sectional view of a magnetron sputtering device;

[0031] Figure 6 yes Figure 5 A partial enlarged view of point B in the middle;

[0032] In the figure: base plate 1, support plate 11, traction roller 12, rubber sleeve 13, rotating box 2, guide groove 21, guide sleeve 22, gear ring 23, bevel gear set 24, motor 25, auxiliary wheel 26, driven wheel 27, clamping member 28, sputtering box 3, one-way groove 31, workpiece rack 32, discharge pipe 33, rotating ring 34, friction plate 35, sealing tube 4, threaded tube 41, target module 42, sealing member 43, sealing ring 44, extrusion capsule 45, tripod 46, first slide groove 5, control disk 51, first through groove 52, limiting wheel 53, limiting plate 54, limiting groove 55, rotating shaft 56, rotating handle 57, meshing wheel 58. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0034] like Figures 1 to 6 As shown, a sputtering method for PVC plastic pipes according to the present invention comprises the following steps:

[0035] S1: After wiping the surface of the plastic pipe with a fine gauze, the plastic pipe is passed into a magnetron sputtering device, and the pulling roller 12 in the magnetron sputtering device is controlled to pull the plastic pipe forward slowly at a rate of 30-50 cm / min;

[0036] S2: Control the heating lamp in the magnetron sputtering device to heat up to 45-60°C, heat and degas the surface of the plastic pipe during the forward process, and polish the surface of the plastic pipe in cooperation with the friction plate 35;

[0037] S3: evacuate the sputtering box 3, introduce argon gas after evacuation, and conduct vacuum sputtering operation by energizing the target material as cathode, the plastic pipe material and the workpiece holder 32 as anode, and continuously rotate the plastic pipe material during sputtering to make the sputtering more uniform;

[0038] The magnetron sputtering device in S1 includes a base plate 1, a sputtering box 3 and a motor 25; the base plate 1 is fixedly connected to one side of the sputtering box 3; a symmetrically designed support plate 11 is fixedly connected to the upper surface of the base plate 1 away from the sputtering box 3; two symmetrically designed support plates 11 are rotatably connected to opposite sides with traction rollers 12; the traction rollers 12 are two in number and arranged vertically in parallel; the base plate 1 is located between the support plate 11 and the sputtering box 3 and is fixedly connected to a rotating box 2; the rotating box 2 is hollow in design; the rotating box 2 is located at the center of the two traction rollers 12 A conducting groove 21 is provided at the rotating box 2; a guide sleeve 22 is rotatably connected in the conducting groove 21; the guide sleeve 22 extends into the inner cavity of the rotating box 2; a heating lamp evenly distributed is inlaid inside the guide sleeve 22; the guide sleeve 22 is located in the inner cavity of the rotating box 2 and is fixedly connected to a gear ring 23; the inner cavity of the rotating box 2 is located on one side of the gear ring 23 and is rotatably connected to a bevel gear set 24 through a guide rod; the bevel gear set 24 meshes with the gear ring 23; the bevel gear set 24 penetrates the rotating box 2 away from the gear ring 23; the motor 25 is fixedly connected to one side of the rotating box 2; the motor The output shaft 25 is fixedly connected to the bevel gear set 24 at one end outside the rotating box 2; the output shaft of the motor 25 is located outside the rotating box 2 and is connected to an auxiliary wheel 26; the traction roller 12 at the lower end is sleeved with a driven wheel 27; the auxiliary wheel 26 and the driven wheel 27 are connected by a belt; the sputtering box 3 is provided with a one-way groove 31 corresponding to the conducting groove 21; the one-way groove 31 is connected to the conducting groove 21 through a sealing tube 4; the inner wall of the sealing tube 4 is threaded; a plurality of threaded tubes 41 are meshed and connected in the sealing tube 4; the sputtering box 3 is a cubic circular cavity structure; the side wall of the sputtering box 3 is fixedly connected with a target module 42; the sputtering box 3 is fixedly connected with a workpiece rack 32 corresponding to the one-way groove 31; the one-way groove 31 penetrates the sputtering box 3 at one end away from the sealing tube 4; the one-way groove 31 is fixedly connected with a discharge pipe 33 at one end away from the sealing tube 4; the inner wall of the threaded tube 41 and the inner wall of the discharge pipe 33 are both fixedly connected with a seal 43; the seal 43 is formed by an elastic rubber sheet and an elastic metal sheet fixedly connected to each other; in the initial state, the seal 43 is conical and blocks the threaded tube 41 and the discharge pipe 33;

[0039] During operation, in the prior art, when performing surface sputtering treatment on long plastic pipes, most of them are processed in a segmented operation mode. In the process of segmented sputtering, it is very easy to cause overlapping of coatings or gaps between coatings between segments, which leads to uneven coating thickness on the surface of the pipe, resulting in poor coating uniformity. At the same time, segmented sputtering also has the defects of poor efficiency and too many operation steps. At the same time, since the pipe is a non-planar body, annular targets are often used for sputtering, so as to perform uniform coating treatment on the curved surface of the pipe. Since there is a certain difference in the magnetic field in the gap between the annular target and the workpiece holder 32, it is easy to cause a certain thickness difference of the coating on the curved surface of the pipe during the sputtering process, which leads to The overall uniformity of the coating is low, which affects the protective effect of the coating on the pipe. By setting the traction roller 12 and the rotating box 2, the rotation of the motor 25 drives the bevel gear set 24 connected to the output shaft of the motor 25 to rotate, and then the transmission of the bevel gear set 24 drives the gear ring 23 to rotate. Since the gear ring 23 is fixedly connected to the guide sleeve 22, the rotating gear ring 23 drives the guide sleeve 22 to rotate. At the same time, the auxiliary wheel 26 sleeved on the output shaft of the motor 25 drives the driven wheel 27 to rotate under the transmission action of the belt, and then the traction roller 12 at the lower end fixedly connected to the driven wheel 27 rotates. When the traction roller 12 rotates, it drives the pipe to move in the direction of the guide groove 21, and the pipe enters the guide sleeve 22. Finally, the friction between the guide sleeve 22 and the wall of the pipe is used to drive the pipe to rotate during the process of moving forward. At the same time, the heating lamp embedded in the guide sleeve 22 heats the surface of the pipe, thereby increasing the surface temperature of the pipe and removing the water vapor and gas on the surface of the pipe. At the same time, since the pipe is rotated by friction, there is a certain difference in the rotation rate between the pipe and the guide sleeve 22, so that the guide sleeve 22 performs preliminary grinding on the surface of the pipe to remove impurities attached to the pipe. The continuously moving pipe enters the sealing tube 4 and squeezes the sealing member 43 during the movement to open the sealing member 43, so that the pipe enters the sputtering box 3. Under the action of power on, the sputtering box 3 uses the principle of glow discharge to make the argon atoms bombard the sputtering box 3. The target material is hit, so that the metal atoms on the target material are blasted out and deposited on the surface of the pipe to form a coating under the action of the magnetic field. By using the traction roller 12 and the rotating box 2, the pipe is rotated while advancing, so that the coating formed on the pipe in the sputtering box 3 is more uniform. At the same time, the seal 43 is tightly attached to the pipe during the advancement and rotation of the pipe, thereby effectively enhancing the sealing performance of the sputtering box 3 and ensuring the sealing performance of the pipe during the movement, so that the sputtering process of the pipe can be continued. On the one hand, it effectively speeds up the efficiency of the sputtering treatment of the pipe and reduces the operating steps of the sputtering work. At the same time, the continuous sputtering combined with the rotation of the pipe itself can also effectively make the thickness of the coating formed on the surface of the pipe more uniform.

[0040] As an embodiment of the present invention, a symmetrically designed first slide groove 5 is provided on opposite sides of the support plate 11; the traction rollers 12 are slidably connected to the first slide groove 5 through springs; the center of the symmetrically designed first slide groove 5 corresponds to the axis of the guide groove 21; during operation, due to certain differences in the diameters of the pipes, the first slide groove 5 is provided, the traction roller 12 is slidably connected to the first slide groove 5, and the center of the symmetrically designed first slide groove 5 corresponds to the axis of the guide groove 21, which can effectively make the axis of the pipe clamped by the two traction rollers 12 automatically aligned with the axis of the guide groove 21, thereby facilitating continuous traction of the pipe.

[0041] As an embodiment of the present invention, both ends of the traction roller 12 pass through the first slide groove 5; the two support plates 11 are fixedly connected with a control disk 51 on the opposite sides; a first through groove 52 is provided inside the control disk 51; the first through groove 52 passes through the control disk 51; the first through groove 52 is rotatably connected to a limiting wheel 53; both ends of the traction roller 12 are rotatably connected to a limiting plate 54; the limiting plates 54 are all "L"-shaped; the limiting plates 54 are all extended to the first through groove 52; the side of the limiting plate 54 close to the limiting wheel 53 is a rack-shaped design; a limiting groove 55 is provided on the side of the control disk 51 away from the support plate 11; a rotating shaft 56 is rotatably connected in the limiting groove 55; the rotating shaft 56 passes through the control disk 51 and extends to the first through groove 52; the rotating shaft 56 is located at the first One end of the through groove 52 is fixedly connected to the limiting wheel 53; a rotating handle 57 is sleeved on the rotating shaft 56; a meshing wheel 58 is fixedly connected to the side of the rotating handle 57 corresponding to the limiting groove 55; the meshing wheel 58 matches the limiting groove 55; during operation, by setting the control disk 51 and the rotating handle 57, the rotating handle 57 is slid outward on the rotating shaft 56, thereby disengaging the meshing wheel 58 from the limiting groove 55, and manually rotating the rotating handle 57 drives the rotating shaft 56 to rotate, thereby rotating the limiting wheel 53 fixedly connected to the rotating shaft 56, and the rotation of the limiting wheel 53 drives the two symmetrical limiting plates 54 to move toward or away from each other, thereby adjusting the distance between the two traction rollers 12, so that the traction roller 12 is completely in contact with the pipe, and the rotating traction roller 12 drives the pipe to move in the direction of the guide groove 21.

[0042] As an embodiment of the present invention, the traction rollers 12 are all sleeved with rubber sleeves 13; the rubber sleeves 13 are all double-conical designs with large ends and small middle; during operation, the rubber sleeves 13 are provided to make soft contact between the traction rollers 12 and the pipes, which can effectively avoid damage to the pipes caused by pressure on the one hand, and at the same time, the rubber sleeves 13 themselves have large friction, which can also avoid slipping between the pipes and the traction rollers 12, affecting the uniform speed operation of the pipes, and the double-conical design of the rubber sleeves 13 can also effectively avoid the deviation of the pipes during movement, resulting in misalignment of the pipe axis and the guide groove 21 axis, thereby avoiding damage to the pipes during operation.

[0043] As an embodiment of the present invention, the inner wall of the guide sleeve 22 is hinged with a clamping piece 28; the clamping piece 28 is a combination of a guide rod and a guide plate; the clamping piece 28 is located on the inner wall of the guide sleeve 22 and is arranged in a spiral shape; the clamping piece 28 is tilted in the initial state; when working, by setting the clamping piece 28, the hinged clamping piece 28 is squeezed by the pipe, and then the pipe is fixed by the clamping piece 28, so that the guide sleeve 22 can adapt to pipes of different sizes, effectively avoiding the need to frequently replace guide sleeves 22 of different sizes after the diameter of the pipe changes, affecting production efficiency, and at the same time, clamping with the clamping piece 28 can effectively form a gap between the pipe and the guide sleeve 22, which is convenient for the gas escaping from the heated pipe to diffuse outward.

[0044] As an embodiment of the present invention, the one-way groove 31 is located at the opening in the inner cavity of the sputtering box 3 and is rotatably connected to a rotating ring 34; a plurality of friction plates 35 are fixedly connected to the inner wall of the rotating ring 34; the friction plates 35 are all inclined; during operation, the pipe enters the inner cavity of the sputtering box 3 through the one-way groove 31, and the pipe contacts the friction plate 35 during the process of self-rotation, thereby rubbing the surface of the pipe to make the surface of the pipe smoother, which is conducive to the deposition of the bombarded atoms on the surface of the pipe to form a coating, and makes the bonding strength between the coating and the pipe stronger, and at the same time, the friction plate 35 is connected to the rotating ring 34, and the rotation of the rotating ring 34 can also avoid damage to the pipe when the friction between the friction plate 35 and the pipe is large.

[0045] As an embodiment of the present invention, the rotating ring 34 is fixedly connected to the workpiece rack 32; the workpiece rack 32 is designed in a pipe-like shape; the surface of the workpiece rack 32 is designed with uniform openings; the surface openings of the workpiece rack 32 are designed in a strip shape; during operation, the pipe extends into the inside of the workpiece rack 32 during the forward movement, and the rotating ring 34 is rotated by the friction between the pipe and the friction plate 35, and there is a difference in the rotation speed of the rotating ring 34 and the pipe, thereby causing the workpiece rack 32 fixedly connected to the rotating ring 34 and the pipe to rotate differentially, thereby effectively preventing the workpiece rack 32 from blocking the pipe and affecting the uniformity of the coating.

[0046] As an embodiment of the present invention, the inner wall of the seal 43 is fixedly connected with evenly distributed sealing rings 44; the diameter of the sealing ring 44 decreases step by step; when working, the conical seal 43 in the initial state is sleeved on the surface of the pipe under the pressure of the pipe, and the sealing rings 44 are evenly distributed on the surface of the seal 43, so that the sealing effect between the seal 43 and the pipe is made stronger.

[0047] As an embodiment of the present invention, the sealing ring 44 is hollow inside; an extrusion bag 45 is fixedly connected between the sealing member 43 and the threaded tube 41; the extrusion bag 45 and the inner cavity of the sealing ring 44 are connected through a conduit; during operation, the tube forms pressure on the sealing member 43, thereby changing the angle of the conical sealing member 43 and covering the surface of the tube, and when the angle between the sealing member 43 and the spiral tube wall changes, a pressurizing effect is formed on the extrusion bag 45, thereby causing the extrusion bag 45 to transport the internal gas to the sealing ring 44 through the conduit, thereby causing the sealing ring 44 to expand, thereby enhancing the sealing effect of the conical sealing member 43, and the sealing effect of the sealing member 43 on the surface of the tube is enhanced through the tight fit between the expanded sealing ring 44 and the tube.

[0048] As an embodiment of the present invention, the plurality of threaded tubes 41 are elastically connected to the sealing tube 4 through a spring; the sealing tube 4 is hinged with a tripod 46 on one side of the threaded tube 41 close to the sputtering box 3; the tripod 46 is formed by two guide rods hinged to each other; the other end of the tripod 46 is hinged to the threaded tube 41; in the initial state, the two guide rods in the tripod 46 are distributed at an obtuse angle, forming a supporting effect on the sealing member 43; during operation, in the initial state, the tripod 46 forms a supporting effect on the sealing member 43, thereby making the sealing member 43 unable to be opened, and the negative pressure formed by the vacuum in the sputtering box 3 cannot open the sealing member 43, when the pipe is transported into the spiral tube, the friction between the pipe and the sealing member 43 drives the spiral tube to rotate, thereby making the spiral tube advance in the sealing tube 4, and in the process of advancing, the two guide rods of the tripod 46 are distributed at an acute angle, thereby making the tripod 46 rotatable, thereby making the angle of the sealing member 43 changeable, and as the pipe continues to advance, the angle of the sealing member 43 changes and covers the surface of the pipe.

[0049] As an embodiment of the present invention, the threaded tube 41 is designed with an arc shape on one side facing the tripod 46, so as to facilitate the tripod 46 to extend into the inner cavity of the threaded tube 41; during operation, as the tripod 46 is distributed at an acute angle, the tripod 46 rotates under the extrusion effect of the tube, and then extends into the threaded tube 41, and can also form an extrusion effect on the extrusion bag 45 on the inner wall of the threaded tube 41, thereby enhancing the tendency of the gas in the extrusion bag 45 to flow into the sealing ring 44.

[0050] The specific workflow is as follows:

[0051] During operation, by setting the traction roller 12 and the rotating box 2, the rotation of the motor 25 drives the bevel gear set 24 connected to the output shaft of the motor 25 to rotate, and then the transmission of the bevel gear set 24 drives the gear ring 23 to rotate. Since the gear ring 23 is connected to the guide sleeve 22, the rotating gear ring 23 drives the guide sleeve 22 to rotate. At the same time, the auxiliary wheel 26 sleeved on the output shaft of the motor 25 drives the driven wheel 27 to rotate under the transmission action of the belt, and then the traction roller 12 located at the lower end connected to the driven wheel 27 rotates. When the traction roller 12 rotates, it drives the pipe to move in the direction of the guide groove 21. After the pipe enters the guide sleeve 22, the friction between the guide sleeve 22 and the pipe wall is used to drive the pipe in the process of moving forward. The guide sleeve 22 rotates, and the heating lamp embedded in the guide sleeve 22 heats the surface of the pipe, thereby increasing the surface temperature of the pipe and removing water vapor and gas on the surface of the pipe. At the same time, since the pipe is rotated by friction, there is a certain difference in the rotation rate between the pipe and the guide sleeve 22, so that the guide sleeve 22 performs preliminary grinding on the surface of the pipe to remove impurities attached to the pipe. The continuously moving pipe enters the sealing tube 4 and squeezes the sealing member 43 during the movement to open the sealing member 43, so that the pipe enters the sputtering box 3. Under the action of power on, the sputtering box 3 uses the glow discharge principle to bombard the target with argon atoms, so that the metal atoms on the target are blasted out and deposited on the surface of the pipe to form a coating under the action of the magnetic field.

[0052] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A sputtering method for PVC plastic pipes, characterized in that: The method comprises the following steps: S1: After wiping the surface of the plastic pipe with a fine gauze, the plastic pipe is passed into a magnetron sputtering device, and a traction roller (12) in the magnetron sputtering device is controlled to pull the plastic pipe forward slowly at a rate of 30-50 cm / min; S2: controlling the heating lamp in the magnetron sputtering device to heat up to 45-60° C., heating and degassing the surface of the plastic pipe during the forward movement, and simultaneously cooperating with the friction plate (35) to polish the surface of the plastic pipe; S3: evacuating the sputtering box (3) and introducing argon gas after evacuation, and applying power to the target as a cathode and the plastic pipe and the workpiece holder (32) as an anode to perform vacuum sputtering. During the sputtering process, the plastic pipe is continuously rotated to make the sputtering process more uniform. The magnetron sputtering device in S1 comprises a base plate (1), a sputtering box (3) and a motor (25); the base plate (1) is fixedly connected to one side of the sputtering box (3); a symmetrically designed support plate (11) is fixedly connected to the upper surface of the base plate (1) away from the sputtering box (3); two symmetrically designed support plates (11) are rotatably connected to opposite sides with traction rollers (12); the traction rollers (12) are two in number and are arranged vertically and in parallel; the base plate (1) is fixedly connected to a rotating box (2) between the support plate (11) and the sputtering box (3); the rotating box (2) is hollow in design; the rotating box (2) is opened at the center of the two traction rollers (12) A conducting groove (21) is provided; a guide sleeve (22) is rotatably connected in the conducting groove (21); the guide sleeve (22) extends into the inner cavity of the rotating box (2); a heating lamp evenly distributed is inlaid in the guide sleeve (22); the guide sleeve (22) is located in the inner cavity of the rotating box (2) and is fixedly connected to a toothed ring (23); the inner cavity of the rotating box (2) is located on one side of the toothed ring (23) and is rotatably connected to a bevel gear set (24) through a guide rod; the bevel gear set (24) is meshed with the toothed ring (23); the bevel gear set (24) penetrates the rotating box (2) on the side away from the toothed ring (23); the motor (25) is fixedly connected to one side of the rotating box (2); the motor ( The output shaft of the motor (25) is fixedly connected to one end of the bevel gear set (24) located outside the rotating box (2); the output shaft of the motor (25) is located outside the rotating box (2) and is connected to an auxiliary wheel (26); the traction roller (12) located at the lower end is sleeved with a driven wheel (27); the auxiliary wheel (26) and the driven wheel (27) are connected by a belt; the sputtering box (3) is provided with a one-way groove (31) corresponding to the conducting groove (21); the one-way groove (31) and the conducting groove (21) are connected by a sealing tube (4); the inner wall of the sealing tube (4) is designed to be threaded; a plurality of threaded tubes (41) are meshedly connected inside the sealing tube (4); the sputtering box ( 3) is a cubic circular cavity structure; a target material module (42) is fixedly connected to the side wall of the sputtering box (3); a workpiece rack (32) is fixedly connected to the one-way groove (31) corresponding to the sputtering box (3); the one-way groove (31) penetrates the sputtering box (3) at one end away from the sealing tube (4); a discharge pipe (33) is fixedly connected to the one end of the one-way groove (31) away from the sealing tube (4); a sealing member (43) is fixedly connected to the inner wall of the threaded tube (41) and the inner wall of the discharge pipe (33); the sealing member (43) is formed by mutually fixing an elastic rubber sheet and an elastic metal sheet; in the initial state, the sealing member (43) is conical and blocks the threaded tube (41) and the discharge pipe (33); The inner wall of the guide sleeve (22) is hinged with a clamping piece (28); the clamping piece (28) is a combination of a guide rod and a guide plate; the clamping piece (28) is located on the inner wall of the guide sleeve (22) and is arranged in a spiral shape; in an initial state, the clamping piece (28) is tilted; after the pipe enters the guide sleeve (22), the friction between the guide sleeve (22) and the pipe wall is used to drive the pipe to rotate during the forward movement.

2. The sputtering method for PVC plastic pipe according to claim 1, characterized in that: The support plate (11) is provided with a symmetrically designed first slide groove (5) on one opposite side; the traction roller (12) is slidably connected to the first slide groove (5) via a spring; and the center of the symmetrically designed first slide groove (5) corresponds to the axis of the conducting groove (21).

3. The sputtering method for PVC plastic pipe according to claim 2, characterized in that: Both ends of the traction roller (12) pass through the first slide groove (5); the two support plates (11) are fixedly connected to a control disk (51) on opposite sides; a first through groove (52) is provided inside the control disk (51); the first through groove (52) passes through the control disk (51); a limiting wheel (53) is rotatably connected inside the first through groove (52); both ends of the traction roller (12) are rotatably connected to a limiting plate (54); the limiting plates (54) are all of "L"-shaped design; the limiting plates (54) are all designed to extend into the first through groove (52); the limiting plates (54) are close to the limiting wheel (53) The control panel (51) is designed in a rack-like shape on both sides; a limiting groove (55) is provided on a side of the control panel (51) away from the support plate (11); a rotating shaft (56) is rotatably connected in the limiting groove (55); the rotating shaft (56) passes through the control panel (51) and extends into the first through groove (52); one end of the rotating shaft (56) is located in the first through groove (52) and is fixedly connected to the limiting wheel (53); a rotating handle (57) is sleeved on the rotating shaft (56); a meshing wheel (58) is fixedly connected to the side of the rotating handle (57) corresponding to the limiting groove (55); the meshing wheel (58) matches the limiting groove (55).

4. A sputtering method for PVC plastic pipe according to claim 3, characterized in that: The traction rollers (12) are all sleeved with rubber sleeves (13); the rubber sleeves (13) are all of double-conical design with large ends and a small middle.

5. The sputtering method for PVC plastic pipe according to claim 1, characterized in that: The one-way groove (31) is rotatably connected to a rotating ring (34) at an opening in the inner cavity of the sputtering box (3); a plurality of friction plates (35) are fixedly connected to the inner wall of the rotating ring (34); and the friction plates (35) are all arranged in an inclined manner.

6. A sputtering method for PVC plastic pipe according to claim 5, characterized in that: The rotating ring (34) is fixedly connected to the workpiece rack (32); the workpiece rack (32) is designed in a pipeline shape; the surface of the workpiece rack (32) is designed with uniform openings; the surface openings of the workpiece rack (32) are designed in a strip shape.

7. The sputtering method for PVC plastic pipe according to claim 1, characterized in that: The inner wall of the sealing member (43) is fixedly connected with evenly distributed sealing rings (44); the diameter of the sealing rings (44) decreases step by step.

8. A sputtering method for PVC plastic pipe according to claim 7, characterized in that: The sealing ring (44) is hollow inside; an extrusion bag (45) is fixedly connected between the sealing member (43) and the threaded tube (41); and the extrusion bag (45) and the inner cavity of the sealing ring (44) are connected via a catheter.

9. A sputtering method for PVC plastic pipe according to claim 8, characterized in that: The plurality of threaded tubes (41) are elastically connected to the sealing tube (4) via a spring; the sealing tube (4) is hingedly connected to a tripod (46) on one side of the threaded tube (41) close to the sputtering box (3); the tripod (46) is formed by two guide rods hingedly connected to each other; the other end of the tripod (46) is hingedly connected to the threaded tube (41); in an initial state, the two guide rods in the tripod (46) are distributed at an obtuse angle, thereby forming a supporting effect on the sealing member (43).

10. A sputtering method for PVC plastic pipe according to claim 9, characterized in that: The side of the threaded tube (41) facing the tripod (46) is designed in an arc shape, so as to facilitate the tripod (46) to extend into the inner cavity of the threaded tube (41).

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