A polytetrafluoroethylene catheter integrated extrusion equipment

Abstract

The utility model relates to the technical field of extrusion devices, and in particular to an integrated extrusion device for polytetrafluoroethylene catheters. It mainly aims at the problem that the length of the catheter extruded at one time is limited due to the limited stroke of the hydraulic rod, and it is difficult to carry out continuous production. The following technical scheme is proposed: it includes an L-shaped bottom plate; a heating mechanism installed on the top of the bottom plate for heating and melting the material; an extrusion mechanism arranged below the heating mechanism and also installed on the top of the bottom plate for continuously extruding the material, the extrusion mechanism includes a discharge barrel, a discharge pipe, a rotating barrel, a limit ring, and a second stirring blade. The discharge barrel is hollow and fixedly connected to the top of the bottom plate by multiple groups of first fixing frames installed on the top of the bottom plate. The utility model can continuously carry out the extrusion production of catheters and can produce catheters of any length. At the same time, the production efficiency is high, the material extrusion is stable, and the product quality is high.

Description

Technical Field

[0001] The utility model relates to the technical field of extrusion devices, in particular to a polytetrafluoroethylene catheter integrated extrusion device. Background Art

[0002] Polytetrafluoroethylene catheter is a common instrument material, usually used in medical applications such as vascular catheterization and interventional surgery. Extrusion is a common processing method that can be used to manufacture plastic products of various shapes and sizes, including medical catheters. In an existing polytetrafluoroethylene tube processing extrusion device, the hydraulic rod at the upper end drives the extrusion plate to press down, thereby squeezing the raw material into the material port at the lower end of the inner box and then into the mold tube from the material port. When it is in use, due to the limited stroke of the hydraulic rod, the length of the catheter extruded at one time has an upper limit, making it difficult to carry out continuous production. In view of this, the utility model proposes an integrated extrusion device for polytetrafluoroethylene catheters. Utility Model Content

[0003] The utility model aims to propose a polytetrafluoroethylene catheter integrated extrusion device to solve the problem that the length of the catheter extruded at one time is limited due to the limited stroke of the hydraulic rod in the background technology, making it difficult to carry out continuous production.

[0004] The technical solution of the utility model is as follows: a polytetrafluoroethylene catheter integrated extrusion device, comprising an L-shaped bottom plate; a heating mechanism installed on the top of the bottom plate for heating and melting the material; an extrusion mechanism arranged below the heating mechanism and also installed on the top of the bottom plate for continuously extruding the material, the extrusion mechanism comprising a discharge barrel, a discharge pipe, a rotating barrel, a limit ring, and a second stirring blade, the discharge barrel is hollow, the discharge barrel is fixedly connected to the top of the bottom plate through multiple groups of first fixing frames installed on the top of the bottom plate, a second fixing frame is installed on the top of the bottom plate, the discharge pipe is fixedly connected in the second fixing frame, the discharge barrel and the discharge pipe are connected through a tapered section, the rotating barrel is arranged in the discharge barrel, two groups of limit rings are fixedly connected to the outside of the rotating barrel, the two groups of limit rings are respectively located on the inner and outer sides of the discharge barrel, and the second stirring blade arranged in a spiral shape is installed on the outer ring of the rotating barrel; a feed pipe is connected between the heating mechanism and the extrusion mechanism; a positioning component is arranged in the extrusion mechanism and cooperates with the extrusion mechanism to extrude tubular materials.

[0005] Optionally, the heating mechanism includes a heating barrel, a feed hopper, a rotating shaft, a first stirring blade, and a first electric heating wire. The heating barrel is hollow and is fixedly connected to the top of the extrusion mechanism through multiple groups of third fixing frames installed on the top of the bottom plate. The feed hopper installed on the top of the heating barrel is connected to the inside of the heating barrel. The rotating shaft is rotatably connected to the heating barrel. The spirally arranged first stirring blade is installed on the outer ring of the rotating shaft. The heating barrel is also provided with a first electric heating wire that is wound around.

[0006] Optionally, the extrusion mechanism also includes a thermal insulation layer, a protective layer, and a second electric heating wire. The outer sides of the discharge barrel, the discharge pipe, and the tapered section are wrapped with a thermal insulation layer. The outer side of the thermal insulation layer is wrapped with a protective layer. The thermal insulation layer is thickened at the position of the tapered section. The outer side of the tapered section is wrapped with a second electric heating wire, and the second electric heating wire is arranged in the thermal insulation layer.

[0007] Optionally, the heating barrel is connected to the discharge cylinder through a delivery pipe, and a solenoid valve is installed on the delivery pipe.

[0008] Optionally, the positioning assembly includes a fixed rod, a center rod, a positioning ring, and a positioning rod. The fixed rod is mounted on the base plate by bolts, one end of the fixed rod passes through the base plate and is inserted into the rotating cylinder, the center rod is threadedly connected to the end of the fixed rod away from the base plate, one end of the center rod extends into the discharge pipe, the positioning ring is rotatably connected to the end of the fixed rod away from the base plate, and multiple groups of positioning rods are fixedly connected between the positioning ring and the conical section.

[0009] Optionally, the positioning assembly further comprises a sealing ring fixedly connected to the outer ring of the fixing rod, the sealing ring is slidably matched with the rotating cylinder, and the cross section of the sealing ring is a T-shaped structure.

[0010] Optionally, it also includes a driving mechanism for driving the rotating shaft and the rotating cylinder to rotate.

[0011] Optionally, the driving mechanism includes a servo motor, a first gear, a second gear, and a third gear. The servo motor is installed on a side of the bottom plate away from the heating mechanism. The output end of the servo motor passes through the bottom plate and is fixedly connected to the first gear. One end of the rotating shaft passes through the heating barrel and is fixedly connected to the second gear. The third gear is installed on a side of the rotating cylinder and the limiting ring away from the discharge pipe. The second gear and the third gear are both meshed with the first gear.

[0012] Compared with the prior art, the utility model has the following beneficial technical effects:

[0013] The utility model heats and melts the material by setting a heating mechanism, so that the material tends to be in a liquid state, and flows into the discharge barrel through the material delivery pipe after the electromagnetic valve is opened, and when the second stirring blade rotates, the material is squeezed out from the position of the discharge pipe, and is discharged in the shape of a conduit formed by the center rod, thereby achieving the purpose of continuous production;

[0014] Furthermore, by setting up the driving mechanism, the rotating shaft and the rotating drum are driven at the same time, which saves energy consumption and improves production efficiency. At the same time, the rotating drum can be positioned by the fixing rod and the positioning ring to ensure the smooth rotation of the rotating drum, thereby ensuring the stability of material extrusion;

[0015] In summary, the utility model can continuously carry out the extrusion production of catheters and can produce catheters of any length, and at the same time has high production efficiency, stable material extrusion and high product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a polytetrafluoroethylene catheter integrated extrusion device;

[0017] Figure 2 yes Figure 1 A schematic cross-sectional structure diagram of ;

[0018] Figure 3 yes Figure 2 The enlarged schematic diagram of point A in the middle;

[0019] Figure 4 It is a structural diagram of the driving mechanism.

[0020] Reference numerals:

[0021] 1. Bottom plate; 11. Second fixing frame; 12. Third fixing frame; 13. First fixing frame;

[0022] 2. Heating mechanism; 21. Heating barrel; 22. Feed hopper; 23. Rotating shaft; 24. First stirring blade; 25. First electric heating wire;

[0023] 3. Extrusion mechanism; 31. Discharging barrel; 32. Discharging pipe; 33. Rotating barrel; 34. Limiting ring; 35. Second stirring blade; 36. Insulating layer; 37. Protective layer; 38. Second electric heating wire;

[0024] 4. Feed pipe; 41. Solenoid valve;

[0025] 5. Positioning assembly; 51. Fixing rod; 52. Center rod; 53. Positioning ring; 54. Positioning rod; 55. Sealing ring;

[0026] 6. Driving mechanism; 61. Servo motor; 62. First gear; 63. Second gear; 64. Third gear. DETAILED DESCRIPTION

[0027] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0028] The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0029] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0030] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Example

[0033] like Figure 1 and Figure 2 As shown, the utility model proposes a polytetrafluoroethylene catheter integrated extrusion device, comprising an L-shaped bottom plate 1, and a heating mechanism 2 installed on the top of the bottom plate 1 for heating and melting the material, the heating mechanism 2 comprising a heating barrel 21, a feed hopper 22, a rotating shaft 23, a first stirring blade 24, and a first electric heating wire 25, the heating barrel 21 is hollow, and the heating barrel 21 is fixedly connected to the top of the extrusion mechanism 3 through multiple sets of third fixing frames 12 installed on the top of the bottom plate 1, and the position of the heating barrel 21 is fixed. The feed hopper 22 installed on the top of the heating barrel 21 is connected to the inside of the heating barrel 21, which is convenient for adding materials to the heating barrel 21. The rotating shaft 23 is rotatably connected to the heating barrel 21, and the rotating shaft 23 rotates in place. The first stirring blade 24 arranged in a spiral shape is installed on the outer ring of the rotating shaft 23, and the first stirring blade 24 rotates synchronously with the rotating shaft 23 and drives the material to move to a position close to the feeding pipe 4 during the rotation, and the material is evenly turned by the first stirring blade 24 during the movement. The heating barrel 21 is also provided with a first electric heating wire 25 wound therein for generating heat to melt the material in the heating barrel 21 to facilitate subsequent extrusion operations.

[0034] Specifically, the extrusion device further includes an extrusion mechanism 3 disposed below the heating mechanism 2 and also mounted on the top of the bottom plate 1 for continuously extruding the material. The extrusion mechanism 3 includes a discharge barrel 31, a discharge pipe 32, a rotating barrel 33, a stop ring 34, and a second stirring blade 35. The discharge barrel 31 is hollow and is fixedly connected to the top of the bottom plate 1 through multiple groups of first fixing frames 13 mounted on the top of the bottom plate 1, and the position of the discharge barrel 31 is fixed. A second fixing frame 11 is mounted on the top of the bottom plate 1, and the discharge pipe 32 is fixedly connected to the second fixing frame 11, and the position of the discharge pipe 32 is fixed. The discharge barrel 31 is connected to the discharge pipe 32 through a tapered section, so that the material in the discharge barrel 31 enters the discharge pipe 32 position for extrusion after passing through the tapered section. The rotating barrel 33 is disposed in the discharge barrel 31, and two groups of stop rings 34 are fixedly connected to the outside of the rotating barrel 33. The two groups of stop rings 34 are respectively located on the inner and outer sides of the discharge barrel 31, and are used to position the rotating barrel 33. The second stirring blade 35 arranged in a spiral shape is installed on the outer ring of the rotating cylinder 33. The second stirring blade 35 rotates synchronously with the rotating cylinder 33 to drive the material in the discharge barrel 31 to move to the discharge pipe 32 and extrude. The extrusion mechanism 3 also includes a thermal insulation layer 36, a protective layer 37, and a second electric heating wire 38. The discharge barrel 31, the discharge pipe 32 and the outer side of the tapered section are wrapped with a thermal insulation layer 36. The thermal insulation layer 36 is used for heat preservation to ensure the temperature inside the discharge barrel 31 and prevent the material from solidifying. The outer side of the thermal insulation layer 36 is wrapped with a protective layer 37, and the protective layer 37 is used for protection. The thermal insulation layer 36 is thickened at the position of the tapered section. The outer side of the tapered section is wrapped with a second electric heating wire 38. The second electric heating wire 38 is arranged in the thermal insulation layer 36. The second electric heating wire 38 is used for heating and heat preservation, thereby preventing the material from entering the discharge pipe 32 with a temperature that is too low. The heating barrel 21 and the discharging barrel 31 are both provided with thermometers to monitor the temperature in real time. At the same time, they are linked with the first electric heating wire 25 and the second electric heating wire 38 to adjust the heating power of the first electric heating wire 25 and the second electric heating wire 38 according to the actual temperature.

[0035] Furthermore, the heating barrel 21 is connected to the discharge barrel 31 through the feeding pipe 4, and the melted material in the heating barrel 21 can flow into the discharge barrel 31 through the feeding pipe 4. A solenoid valve 41 is installed on the feeding pipe 4 to realize automatic feeding. When the material in the discharge barrel 31 is insufficient, the solenoid valve 41 automatically opens to add material.

[0036] For further information, see Figure 2 and Figure 3The extrusion device also includes a positioning assembly 5 which is arranged in the extrusion mechanism 3 and cooperates with the extrusion mechanism 3 to extrude the tubular material. The positioning assembly 5 includes a fixed rod 51, a center rod 52, a positioning ring 53, and a positioning rod 54. The fixed rod 51 is installed on the bottom plate 1 by bolts, and the position of the fixed rod 51 is fixed. One end of the fixed rod 51 passes through the bottom plate 1 and is inserted into the rotating cylinder 33. The center rod 52 is threadedly connected to the end of the fixed rod 51 away from the bottom plate 1. One end of the center rod 52 extends into the discharge pipe 32. The center rod 52 is used to cooperate with the discharge pipe 32 to realize the tubular extrusion of the material. The positioning ring 53 is rotatably connected to the end of the fixed rod 51 away from the bottom plate 1. A plurality of positioning rods 54 are fixedly connected between the positioning ring 53 and the conical section. The position of the positioning ring 53 is fixed, and the position of the fixed rod 51 is stable and will not tilt, and the smooth rotation of the rotating cylinder 33 is ensured. The positioning assembly 5 further includes a sealing ring 55 fixedly connected to the outer ring of the fixing rod 51 . The sealing ring 55 is slidably matched with the rotating cylinder 33 , and the cross section of the sealing ring 55 is a T-shaped structure to prevent materials from entering the rotating cylinder 33 .

[0037] Finally, if Figure 2 and Figure 4 As shown, the extrusion device includes a driving mechanism 6 for driving the rotating shaft 23 and the rotating cylinder 33 to rotate, the driving mechanism 6 includes a servo motor 61, a first gear 62, a second gear 63, and a third gear 64. The servo motor 61 is installed on the side of the bottom plate 1 away from the heating mechanism 2, the output end of the servo motor 61 passes through the bottom plate 1 and is fixedly connected to the first gear 62, one end of the rotating shaft 23 passes through the heating barrel 21 and is fixedly connected to the second gear 63, the third gear 64 is installed on the side of the rotating cylinder 33 and the limiting ring 34 away from the discharge pipe 32, and the second gear 63 and the third gear 64 are both engaged with the first gear 62.

[0038] In this embodiment, first, a proper amount of material is added to the heating barrel 21 through the feed hopper 22, and the servo motor 61 is started to drive the first gear 62 to rotate. The first gear 62 also drives the second gear 63 and the third gear 64 to rotate synchronously. At this time, the rotating shaft 23 and the rotating cylinder 33 rotate synchronously. When the rotating shaft 23 rotates, it drives the first stirring blade 24 to rotate synchronously and drives the material in the heating barrel 21 to turn over. The material is mixed while approaching the position of the feed pipe 4. At this time, the first electric heating wire 25 generates heat to increase the temperature in the heating barrel 21, and then the material melts. After the material is completely melted, the solenoid valve 41 is opened, and the melted material in the heating barrel 21 enters the discharge barrel 31. When the rotating barrel 33 rotates, it drives the second stirring blade 35 to rotate synchronously. When the second stirring blade 35 rotates, it drives the material to enter the discharge pipe 32 through the tapered section for extrusion, and at the same time cooperates with the fixed center rod 52 to form a tubular structure. The material is repeatedly added to the heating barrel 21 for melting, and the material is replenished into the discharge barrel 31 before the material in the discharge barrel 31 is exhausted, thereby achieving a continuous extrusion operation.

[0039] The above specific embodiment is only an optional embodiment of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above embodiment, those skilled in the art can make various alternative improvements and combinations to the above specific embodiment.

Claims

1. A polytetrafluoroethylene catheter integrated extrusion device, characterized in that: include: An L-shaped bottom plate (1); A heating mechanism (2) installed on the top of the bottom plate (1) for heating and melting the material; An extrusion mechanism (3) is arranged below the heating mechanism (2) and is also installed on the top of the bottom plate (1) for continuously extruding materials. The extrusion mechanism (3) comprises a discharge barrel (31), a discharge pipe (32), a rotating barrel (33), a limiting ring (34), and a second stirring blade (35). The discharge barrel (31) is hollow and is fixedly connected to the top of the bottom plate (1) through a plurality of first fixing frames (13) installed on the top of the bottom plate (1). The top of the bottom plate (1) A second fixed frame (11) is installed on the part, a discharge pipe (32) is fixedly connected to the second fixed frame (11), the discharge barrel (31) and the discharge pipe (32) are connected through a conical section, the rotating barrel (33) is arranged in the discharge barrel (31), two groups of limiting rings (34) are fixedly connected to the outer side of the rotating barrel (33), and the two groups of limiting rings (34) are respectively located on the inner and outer sides of the discharge barrel (31), and the second stirring blade (35) arranged in a spiral shape is installed on the outer ring of the rotating barrel (33); A material delivery pipe (4) is connected between the heating mechanism (2) and the extrusion mechanism (3); A positioning component (5) is arranged in the extrusion mechanism (3) and cooperates with the extrusion mechanism to extrude the tubular material.

2. The integrated polytetrafluoroethylene catheter extrusion device according to claim 1, characterized in that: The heating mechanism (2) comprises a heating barrel (21), a feed hopper (22), a rotating shaft (23), a first stirring blade (24), and a first electric heating wire (25); the heating barrel (21) is hollow and is fixedly connected to the top of the extrusion mechanism (3) via a plurality of third fixing frames (12) installed on the top of the bottom plate (1); the feed hopper (22) installed on the top of the heating barrel (21) is connected to the inside of the heating barrel (21); the rotating shaft (23) is rotatably connected to the heating barrel (21); the first stirring blade (24) arranged in a spiral shape is installed on the outer ring of the rotating shaft (23); and the heating barrel (21) is also provided with a first electric heating wire (25) arranged in a winding manner.

3. The integrated polytetrafluoroethylene catheter extrusion device according to claim 1, characterized in that: The extrusion mechanism (3) also includes a thermal insulation layer (36), a protective layer (37), and a second electric heating wire (38); the discharge barrel (31), the discharge pipe (32), and the outer side of the conical section are wrapped with a thermal insulation layer (36); the outer side of the thermal insulation layer (36) is wrapped with a protective layer (37); the thermal insulation layer (36) is thickened at the position of the conical section; the outer side of the conical section is wrapped with a second electric heating wire (38); and the second electric heating wire (38) is arranged in the thermal insulation layer (36).

4. The integrated polytetrafluoroethylene catheter extrusion device according to claim 2, characterized in that: The heating barrel (21) is connected to the discharge cylinder (31) via a delivery pipe (4), and a solenoid valve (41) is installed on the delivery pipe (4).

5. The integrated polytetrafluoroethylene catheter extrusion device according to claim 1, characterized in that: The positioning assembly (5) comprises a fixing rod (51), a center rod (52), a positioning ring (53), and a positioning rod (54); the fixing rod (51) is mounted on the base plate (1) by means of bolts; one end of the fixing rod (51) passes through the base plate (1) and is inserted into the rotating cylinder (33); the center rod (52) is threadedly connected to an end of the fixing rod (51) away from the base plate (1); one end of the center rod (52) extends into the discharge pipe (32); the positioning ring (53) is rotatably connected to an end of the fixing rod (51) away from the base plate (1); and a plurality of groups of positioning rods (54) are fixedly connected between the positioning ring (53) and the conical section.

6. The integrated polytetrafluoroethylene catheter extrusion device according to claim 5, characterized in that: The positioning assembly (5) further comprises a sealing ring (55) fixedly connected to the outer ring of the fixing rod (51); the sealing ring (55) is slidably matched with the rotating cylinder (33); and the cross section of the sealing ring (55) is a T-shaped structure.

7. The integrated polytetrafluoroethylene catheter extrusion device according to claim 2, characterized in that: It also includes a driving mechanism (6) for driving the rotating shaft (23) and the rotating cylinder (33) to rotate.

8. The integrated polytetrafluoroethylene catheter extrusion device according to claim 7, characterized in that: The driving mechanism (6) comprises a servo motor (61), a first gear (62), a second gear (63), and a third gear (64); the servo motor (61) is mounted on a side of the bottom plate (1) away from the heating mechanism (2); an output end of the servo motor (61) passes through the bottom plate (1) and is fixedly connected to the first gear (62); one end of the rotating shaft (23) passes through the heating barrel (21) and is fixedly connected to the second gear (63); the third gear (64) is mounted on a side of the rotating cylinder (33) and the limiting ring (34) away from the discharge pipe (32); the second gear (63) and the third gear (64) are both meshed with the first gear (62).

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