Coating, sintering and collecting equipment

Abstract

The invention discloses coating, sintering and collecting equipment which is characterized by comprising a dip-coating system, a sintering system and a collecting system, the dip-coating system comprises a fixed base, a moving device, a second wire guide wheel, a feeding roll and a moving device, the fixed base comprises a solution bin, a first wire guide wheel and a sensing device arranged in the solution bin, and the first wire guide wheel is fixed to the fixed base; the three dynamic balance fixing systems are annular and cylindrical; the two dynamic balance fixing systems are respectively arranged between the fixed base and the feeding roll and on the connecting frame below the two drying areas, and each dynamic balance fixing system comprises an electromagnet, a sensor and a controller; a sintering system; the sintering system is fixed on the connecting frame and comprises a drying area, a preheating area and a sintering area; a collection system; the system is arranged behind the sintering system. According to the device, high-precision continuous dip-coating production, sintering and collection of the PTFE ultrathin pipe can be completed, loss is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of medical polymer materials, and in particular relates to a coating, sintering and collecting device. Background Art

[0002] Polytetrafluoroethylene (PTFE) has excellent properties of heat resistance, solvent resistance, corrosion resistance, low surface energy and low friction coefficient. PTFE can be made into a variety of products. The chemical and mechanical properties of PTFE make these products useful for a variety of purposes.

[0003] The PTFE catheter dip coating process faces the problems of low dip coating accuracy and difficulty in collecting small-sized PTFE ultra-thin wall tubes. Improving the dip coating accuracy of PTFE catheters often places high demands on the smooth operation of equipment and operators, which also leads to a significant increase in costs and a high failure rate. However, as an important component of vascular catheter components, the manufacturing accuracy of PTFE catheters cannot be lowered; secondly, the requirement of ultra-thin wall thickness of vascular catheters for PTFE tubes means that the PTFE tubes will be more fragile. Because the vascular catheter body is long, efficient and lossless collection without damaging the catheter is also a difficult problem that needs to be overcome.

[0004] Although some of the current domestic automated dipping equipment can effectively complete a series of processes including dipping, sintering and collection, they are faced with the problem of uneven dipping thickness caused by continuous consumption and replenishment of dipping solution during continuous production, frequent shaking of the dipping mandrel during equipment operation resulting in a decline in product quality, unreasonable sintering process resulting in poor performance of the PTFE ultra-thin tube, and the relatively fragile nature of the PTFE ultra-thin tube, resulting in difficult collection, low efficiency and high scrap rate. The present invention solves such problems well by real-time control of the dipping depth, effective control of the shaking of the dipping mandrel, excellent sintering system structure, and a design in which the collection wheel group more effectively fits the tube body. Summary of the invention

[0005] The problem to be solved by the present invention is the high-precision continuous production of PTFE ultra-thin tubes, ultra-smooth operation of the equipment during the dipping process, a stable and effective sintering process, and efficient and lossless collection of pipelines.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A coating sintering collection device, comprising: Dip coating system; the dip coating system comprises a fixed base, a moving device, a second wire wheel, a loading roll, and a moving device, the fixed base comprises a solution tank, a first wire wheel, and a sensing device placed inside the solution tank, and the first wire wheel is fixed on the fixed base; Three annular cylindrical dynamic balancing fixing systems are respectively installed on the connecting frame between the fixed base and the feeding roll and below the two drying areas, and each dynamic balancing fixing system includes an electromagnet, a sensor, and a controller; Sintering system; fixed on the connecting frame, the sintering system includes a drying area, a preheating area, and a sintering area; Collection system; located behind the sintering system.

[0007] Furthermore, the moving device is fixedly connected to the solution tank via a connecting rod, and the second guide wheel is fixed on a fixed base; Furthermore, the moving device is fixedly connected to the second guide wheel via a connecting rod, and the solution tank is fixed on a fixed base.

[0008] Furthermore, the collection system includes a traction base, and the traction base is provided with a wire wheel three, a wire wheel four, a wire wheel group, and a wire collection wheel in a clockwise direction, and the wire wheel group is composed of multiple wire wheels connected in parallel.

[0009] Furthermore, the drying zone, preheating zone and sintering zone of the sintering system are connected in sequence in a U shape.

[0010] Furthermore, the wire pulley 1, wire pulley 2, wire pulley 3, wire pulley 4, wire pulley assembly and wire collection pulley are provided with grooves, and the grooves are covered with a ceramic coating.

[0011] Beneficial effects: 1. The present invention fixes the solution tank on the mobile device to make it movable. The solution tank contains a sensing device, which can sense the volume change of the solution in the solution tank in real time, and feed back to the mobile device to drive the solution tank to move, so as to adjust the dipping depth of the mandrel on the wire wheel in real time. When the equipment continues to produce dipping, the stability of the dipping thickness of the mandrel is ensured under the condition of continuous consumption of the solution, thereby improving the production accuracy of the PTFE tube; 2. The dynamic balancing fixing system of the present invention locks the position of the coating mandrel by the principle of magnetic suspension, which can prevent the coating mandrel from swinging and vibrating when entering and exiting the solution and transferring between systems, so that the coating mandrel can run smoothly and improve product quality and product qualification rate; 3. The present invention adopts a U-shaped segmented design for the sintering system, which can increase the channel length, greatly prolong the sintering time of the PTFE coating material, enhance the stability of the dip coating sintering, and reduce the floor space occupied by the equipment while ensuring the dip coating thickness, so that the sintering process is stable and effective; 4. The wire wheel assembly of the present invention is provided with a groove that fits the tube body, which can enhance the protection and control of the PTFE ultra-thin tube and complete the rapid and lossless collection of the tube body. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a partial schematic diagram of a first embodiment of the dipping system of the present invention; Figure 3 A partial schematic diagram of a second embodiment of the dipping system of the present invention; Figure 4 It is a structural schematic diagram of the sintering system of the present invention; Figure 5 It is a schematic diagram of the structure of the collection system of the present invention.

[0013] In the figure: 1. Dipping system; 10. Connecting frame; 100. Fixed base; 101. Solution tank; 102. Induction device; 103. Moving device; 104. Wire wheel one; 105. Wire wheel two; 106. Loading roll; 107. Connecting rod; 2. Dynamic balancing fixing system; 3. Sintering system; 301. Drying area; 302. Preheating area; 303. Sintering area; 4. Collecting system; 400. Wire wheel three; 401. Wire wheel four; 402. Wire wheel group; 403. Wire collection wheel; 404. Traction base; 500. Dipping mandrel; 600. Groove. DETAILED DESCRIPTION

[0014] In order to more thoroughly understand the features and technical contents of the present invention, the implementation of the present invention is described in detail below in conjunction with the accompanying drawings. The attached drawings are only for reference and explanation, and are not used to limit the present invention.

[0015] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0016] Embodiment 1: A coating sintering collection device, comprising: Dipping system 1; the dipping system 1 comprises a fixed base 100, a moving device 103, a second wire wheel 105, a loading roll 106, and the moving device 103; the fixed base 100 comprises a solution tank 101, a first wire wheel 104, and a sensing device 102 disposed inside the solution tank 101; the first wire wheel 104 is fixed on the fixed base 100; Three annular cylindrical dynamic balancing fixing systems 2 are respectively installed on the connecting frame 10 between the fixed base 100 and the loading roll 106 and below the two drying areas 301. Each dynamic balancing fixing system 2 includes an electromagnet, a sensor, and a controller. The sintering system 3 is fixed on the connecting frame 10, and the sintering system 3 includes a drying area 301, a preheating area 302, and a sintering area 303; Located at the rear side of the sintering system 3.

[0017] Furthermore, the moving device 103 is fixedly connected to the solution tank 101 via a connecting rod 107, and the second guide wheel 105 is fixed on the fixed base 100; The collecting system 4 includes a traction base 404, and the traction base 404 is provided with a wire wheel 3 400, a wire wheel 401, a wire wheel group 402, and a wire collection wheel 403 in a clockwise direction. The wire wheel group 402 is composed of a plurality of wire wheels connected in parallel.

[0018] The drying zone 301 , the preheating zone 302 , and the sintering zone 303 of the sintering system 3 are connected in sequence in a U shape.

[0019] The wire wheel 1 104 , the wire wheel 2 105 , the wire wheel 3 400 , the wire wheel 401 , the wire wheel assembly 402 , and the wire collection wheel 403 are provided with grooves 600 , and the grooves 600 are covered with ceramic coatings.

[0020] The specific working process is: When the coating sintering and collecting equipment starts production, the operator pulls the coating mandrel 500 from the loading roll 106, passes it through the dynamic balancing fixing system 2 installed here, and then installs the coating mandrel 500 on the wire wheel 1 104 and the wire wheel 2 105 at the coating system 1. After that, the coating mandrel 500 passes through the dynamic balancing fixing system 2 and enters the sintering system 3. After the coating mandrel 500 comes out of the sintering system 3, it passes through the dynamic balancing fixing system 2 installed here, and finally the coating mandrel 500 is successively installed on the wire wheel 3 400, the wire wheel 401, the wire wheel group 402 and the wire collection wheel 403.

[0021] The dynamic balancing fixing system 2 is composed of an electromagnet, a sensor, and a controller. It uses the principle of magnetic levitation to control the position of the dipping mandrel 500 to avoid frequent shaking of the dipping mandrel 500. When the dipping mandrel 500 is disturbed by external force, the sensor detects the deviation position and converts the deviation position into a control signal to control the magnetic force change of the electromagnet to drive the dipping mandrel 500 back to the original balanced position. Under the continuous influence of external force, the dipping mandrel 500 always maintains a balanced state.

[0022] During continuous production, a proper amount of solution is added to the solution tank 101, and the sensing device 102 controls the movement of the moving device 103 according to the amount of solution. The moving device 103 drives the solution tank 101 to pass over the second wire wheel 105, ensuring that the thickness of the solution layer wrapped on the dipping mandrel 500 is uniform, and the dipping begins. As the production progresses, the solution in the solution tank 101 is consumed. The sensing device 102 controls the moving device 103 to drive the solution tank 101 to move upward by transmitting a signal until the dipping can continue. After the solution is replenished, the sensing device 102 also controls the moving device 103 to drive the solution tank 101 to move downward.

[0023] After the dip coating is completed, the operator powers on the equipment, and the collection system 4 drives the dip coating mandrel 500 to start running, driving the dip coating mandrel 500 to move, and sequentially passes through the dynamic balancing fixing system 2-sintering system 3-dynamic balancing fixing system 2. The dynamic balancing fixing system 2 uses the principle of magnetic levitation to pass the dip coating mandrel 500 through the charged coil to control the relative position of the dip coating mandrel 500 in the dynamic balancing fixing system 2, which can avoid the swaying problem during the operation of the mandrel. After sintering is completed, the dip coating mandrel 500 is finally collected into the collection wheel 403 with the collection system 4.

[0024] Embodiment 2: A coating sintering collection device, comprising: Dipping system 1; the dipping system 1 comprises a fixed base 100, a moving device 103, a second wire wheel 105, a loading roll 106, and the moving device 103; the fixed base 100 comprises a solution tank 101, a first wire wheel 104, and a sensing device 102 disposed inside the solution tank 101; the first wire wheel 104 is fixed on the fixed base 100; Three annular cylindrical dynamic balancing fixing systems 2 are respectively installed on the connecting frame 10 between the fixed base 100 and the loading roll 106 and below the two drying areas 301. Each dynamic balancing fixing system 2 includes an electromagnet, a sensor, and a controller. The sintering system 3 is fixed on the connecting frame 10, and the sintering system 3 includes a drying area 301, a preheating area 302, and a sintering area 303; Collection system 4; located at the rear side of sintering system 3.

[0025] The moving device 103 is fixedly connected to the second guide wheel 105 via a connecting rod 107 , and the solution tank 101 is fixed on a fixed base 100 .

[0026] The collecting system 4 includes a traction base 404, and the traction base 404 is provided with a wire wheel 3 400, a wire wheel 401, a wire wheel group 402, and a wire collection wheel 403 in a clockwise direction. The wire wheel group 402 is composed of a plurality of wire wheels connected in parallel.

[0027] The drying zone 301 , the preheating zone 302 , and the sintering zone 303 of the sintering system 3 are connected in sequence in a U shape.

[0028] The wire wheel 1 104 , the wire wheel 2 105 , the wire wheel 3 400 , the wire wheel 401 , the wire wheel assembly 402 , and the wire collection wheel 403 are provided with grooves 600 , and the grooves 600 are covered with ceramic coatings.

[0029] The specific working process is: When the coating sintering and collecting equipment starts production, the operator pulls the coating mandrel 500 from the loading roll 106, passes it through the dynamic balancing fixing system 2 installed here, and then installs the coating mandrel 500 on the wire wheel 1 104 and the wire wheel 2 105 at the coating system 1. After that, the coating mandrel 500 passes through the dynamic balancing fixing system 2 and enters the sintering system 3. After the coating mandrel 500 comes out of the sintering system 3, it passes through the dynamic balancing fixing system 2 installed here, and finally the coating mandrel 500 is successively installed on the wire wheel 3 400, the wire wheel 401, the wire wheel group 402 and the wire collection wheel 403.

[0030] The dynamic balancing fixing system 2 is composed of an electromagnet, a sensor, and a controller. It uses the principle of magnetic levitation to control the position of the dipping mandrel 500 to avoid frequent shaking of the dipping mandrel 500. When the dipping mandrel 500 is disturbed by external force, the sensor detects the deviation position and converts the deviation position into a control signal to control the magnetic force change of the electromagnet to drive the dipping mandrel 500 back to the original balanced position. Under the continuous influence of external force, the dipping mandrel 500 always maintains a balanced state.

[0031] During continuous production, a proper amount of solution is added to the solution tank 101, and the sensing device 102 controls the movement of the moving device 103 according to the amount of solution. The moving device 103 drives the second wire wheel 105 to immerse in the solution tank 101 to ensure that the thickness of the solution layer wrapped on the dipping mandrel 500 is uniform, and the dipping begins. As the production progresses, the solution in the solution tank 101 is consumed. The sensing device 102 controls the moving device 103 to drive the second wire wheel 105 to move downward by transmitting a signal until the dipping can continue. After the solution is replenished, the sensing device 102 also controls the moving device 103 to drive the second wire wheel 105 to move upward.

[0032] After the dip coating is completed, the operator powers on the equipment, and the collection system 4 drives the dip coating mandrel 500 to start running, driving the dip coating mandrel 500 to move, and sequentially passes through the dynamic balancing fixing system 2-sintering system 3-dynamic balancing fixing system 2. The dynamic balancing fixing system 2 uses the principle of magnetic levitation to pass the dip coating mandrel 500 through the charged coil to control the relative position of the dip coating mandrel 500 in the dynamic balancing fixing system 2, which can avoid the swaying problem during the operation of the mandrel. After sintering is completed, the dip coating mandrel 500 is finally collected into the collection wheel 403 with the collection system 4.

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A coating sintering collection device, characterized in that: include: A dipping system (1); the dipping system (1) comprises a fixed base (100), a moving device (103), a second wire wheel (105), a loading roll (106), and the moving device (103); the fixed base (100) comprises a solution tank (101), a first wire wheel (104), and a sensing device (102) disposed inside the solution tank (101); the first wire wheel (104) is fixed on the fixed base (100); Three annular cylindrical dynamic balancing fixing systems (2); respectively mounted on a connecting frame (10) between a fixed base (100) and a loading roll (106) and below two drying areas (301); each dynamic balancing fixing system (2) comprises an electromagnet, a sensor, and a controller; A sintering system (3); fixed on the connecting frame (10), the sintering system (3) comprising a drying area (301), a preheating area (302), and a sintering area (303); The collecting system (4) is located at the rear side of the sintering system (3).

2. The coating sintering collection device according to claim 1, characterized in that: The moving device (103) is fixedly connected to the solution tank (101) via a connecting rod (107), and the second guide wheel (105) is fixed on a fixed base (100).

3. The coating sintering collection device according to claim 1, characterized in that: The moving device (103) is fixedly connected to the second guide wheel (105) via a connecting rod (107), and the solution tank (101) is fixed on a fixed base (100).

4. The coating, sintering and collecting device according to any one of claims 2-3, characterized in that: The collecting system (4) comprises a traction base (404), wherein the traction base (404) is provided with a wire wheel three (400), a wire wheel four (401), a wire wheel group (402), and a wire collection wheel (403) in sequence in a clockwise direction, wherein the wire wheel group (402) is composed of a plurality of wire wheels connected in parallel.

5. The coating sintering collection device according to claim 4, characterized in that: The drying zone (301), the preheating zone (302), and the sintering zone (303) of the sintering system (3) are connected in sequence in a U shape.

6. The coating sintering collection device according to claim 5, characterized in that: The wire wheel one (104), the wire wheel two (105), the wire wheel three (400), the wire wheel four (401), the wire wheel group (402), and the wire collection wheel (403) are provided with grooves (600), and the grooves (600) are covered with a ceramic coating.

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