Full-automatic medical dilating tube hot melt forming device

Abstract

The application belongs to the technical field of medical dilatation tube manufacturing, and discloses a full-automatic medical dilatation tube hot melting forming device, which comprises a hot melting box and a screw extruder, the hot melting box is connected with the screw extruder through a discharge pipe, a controller is arranged on the hot melting box, an inclined angle machine head is connected to the discharge end of the screw extruder, a forming die sleeve is threadedly connected to the end of the inclined angle machine head, a die core is arranged in the forming die sleeve, a cooling box is arranged on one side of the hot melting box, through holes are formed in the two sides of the cooling box, the forming die sleeve extends into the cooling box through the through holes, and a cold gas spraying assembly is arranged in the cooling box and is on the same straight line as the center of the forming die sleeve. According to the scheme, the cold gas output mechanisms are arranged on the inner wall and the outer wall of the forming dilatation tube extruded from the forming die sleeve and the die core to perform cooling, on the one hand, the cooling efficiency can be further improved, and on the other hand, the processing technology of the dilatation tube is simplified, and subsequent drying treatment is not needed, so that the cooling time is saved.

Description

Technical Field

[0001] This invention relates to the field of medical expander manufacturing technology, and more specifically, to a fully automated medical expander thermoforming device. Background Technology

[0002] The fully automated medical expander tube hot melt forming device is a piece of equipment used to manufacture medical expander tubes. Its working principle is as follows:

[0003] 1. Plastic material feeding: First, add medical-grade plastic granules or sheets into the feed port of the hot melt box. These plastic materials are usually medical-grade polyvinyl chloride (PVC) or polycarbonate (PC).

[0004] 2. Heating and melting: The material is heated to its melting temperature using a hot melt box, and a stirring mechanism is used to mix the material evenly;

[0005] 3. Screw extruder extrusion molding: Molten material is extruded through a screw extruder and the extruded tubular material passes through a shaping sleeve with the same inner diameter as the outer diameter of the product. The pressure difference is used to make the tubular material tightly adhere to the inner wall of the shaping sleeve, thereby obtaining a tube with an accurate outer diameter.

[0006] 4. Cooling and curing: The extruded tubular material is rapidly cooled and cured by the drawing equipment into the cooling system. The cooling time depends on the material type and pipe size.

[0007] 5. Product collection: After cooling is complete, the product is wound up using a winding mechanism.

[0008] The fully automated medical expander tube thermoforming equipment achieves efficient, precise, and stable expander tube production through an automated process. It is widely used in the medical device manufacturing industry, providing expander tubes of various specifications and qualities for the medical field.

[0009] Current fully automated medical expansion tube thermomelting forming equipment typically uses water cooling or air cooling in the cooling and curing stage. For water cooling, drying is required after cooling, which takes a long time.

[0010] Air-cooled systems typically spray cold air onto the surface of the expansion tubes. While this saves drying time, the cooling is incomplete and prone to leaks, which can affect the production quality of the expansion tubes. Summary of the Invention

[0011] The purpose of this invention is to overcome the shortcomings of the existing technology and to propose a fully automatic medical expansion tube thermoforming device.

[0012] To achieve the above objectives, the present invention adopts the following technical solution;

[0013] A fully automatic medical expander tube hot melt forming device includes a hot melt box and a screw extruder. The hot melt box and the screw extruder are connected by a discharge pipe. A controller is installed on the hot melt box. An angled die head is connected to the discharge end of the screw extruder. A forming die sleeve is threaded to the end of the angled die head. A die core is installed inside the forming die sleeve. A cooling box is installed on one side of the hot melt box. Through openings are provided on both sides of the cooling box. The forming die sleeve extends into the cooling box through the through openings. A cold air spraying assembly is installed in the cooling box and is aligned with the center of the forming die sleeve. The cold air spraying assembly is sleeved on the outside of the forming die sleeve. A first driving mechanism is installed on the cooling box to drive the cold air spraying assembly to rotate.

[0014] The mold core has a cavity, and a horizontally arranged built-in tube is inserted inside the molding mold sleeve and on the mold core. The built-in tube extends into the cavity. Several through holes are opened on the surface of the part of the built-in tube located outside the mold core and inside the molding mold sleeve. The built-in tube extends through the mold core to the outside of the molding mold sleeve. A connector is connected to the end of the built-in tube located outside the mold core.

[0015] As a further description of the above technical solution:

[0016] The connector is equipped with a connecting pipe, which is used to connect to a cold air source.

[0017] As a further description of the above technical solution:

[0018] The cold air spraying assembly includes several rigid annular tubes equidistantly arranged within a cooling box along the extension direction of the forming die. Each rigid annular tube has several nozzles on its inner side. Multiple fixing rods are fixedly connected between adjacent rigid annular tubes. Multiple fixing rods are also fixedly connected to the outer side of the rigid annular tube furthest from the forming die. The outermost fixing rod extends through a through-hole to the outside of the cooling box and connects to the first driving mechanism. An air inlet pipe is inserted into the through-hole on the side of the cooling box away from the screw extruder. The air inlet pipe communicates with each rigid annular tube and is used to connect to a cold air source. A limiting guide for the rotation of the rigid annular tubes is provided within the cooling box.

[0019] As a further description of the above technical solution:

[0020] The first driving mechanism includes a transmission gear, which is located at the through-hole of the cooling box away from the screw extruder. The transmission gear is fixedly connected to a fixed rod, and a drive gear meshes on the transmission gear. A servo motor is fixedly installed on the cooling box, and the output shaft of the servo motor is fixedly connected to the drive gear.

[0021] As a further description of the above technical solution:

[0022] The connector is a rotary connector, and the built-in tube is provided with a second drive mechanism to drive its rotation.

[0023] As a further description of the above technical solution:

[0024] The second drive mechanism includes a first bevel gear sleeved on the inner tube, a second bevel gear meshing with the bottom of the first bevel gear, a rotating shaft fixedly connected to the bottom of the second bevel gear, a support plate fixedly installed on the forming mold sleeve, a drive motor fixedly installed on the support plate, and the output shaft of the drive motor fixedly connected to the rotating shaft.

[0025] As a further description of the above technical solution:

[0026] The inner wall auxiliary component is provided on the surface of the portion of the built-in tube located outside the mold core and inside the forming mold sleeve.

[0027] As a further description of the above technical solution:

[0028] The inner wall auxiliary assembly includes two support rods mounted on the outer side of the inner tube, and a roller rotatably connected between the two support rods. The distance between the outer side wall of the roller and the inner side wall of the forming mold sleeve is the same as the distance between the outer side wall of the mold core and the inner side wall of the forming mold sleeve.

[0029] As a further description of the above technical solution:

[0030] The end of the air intake pipe located outside the cooling box is a telescopic flexible hose.

[0031] As a further description of the above technical solution:

[0032] The cooling box is a horizontally arranged hollow cylindrical structure. The limiting guide includes multiple circular grooves formed on the inner wall of the cooling box. Multiple sliders are slidably connected in each circular groove. A connecting rod is fixedly connected to each slider. The connecting rod is fixedly connected to the fixed rod.

[0033] Compared with the prior art, the advantages of this invention are:

[0034] I. This solution uses a cooling air output mechanism on both the inner and outer walls of the extruded expansion tube from the forming die sleeve and die core for cooling. On the one hand, this can further accelerate the cooling efficiency, and on the other hand, it simplifies the processing technology of the expansion tube, eliminating the need for subsequent drying and saving cooling time.

[0035] Second, this solution uses a first driving mechanism to drive the cold air spraying assembly used to cool the outer wall of the expansion tube to rotate, and a second driving mechanism to enable the inner tube to rotate as well, thereby achieving cold air spraying at different positions on the inner wall, making the cooling of the expansion tube more comprehensive and further improving the cooling effect.

[0036] Third, based on the rotation of the built-in tube, this solution makes the inner wall auxiliary component contact with the inner wall of the expansion tube, and drives the inner wall auxiliary component to rotate when the built-in tube rotates, so as to smooth the inner wall and reduce the collapse and unevenness of the inner wall of the expansion tube. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of the present invention;

[0038] Figure 2 For the present invention Figure 1 Cross-sectional view of the forming die sleeve;

[0039] Figure 3 This is a schematic diagram of the internal structure of the cooling box of the present invention;

[0040] Figure 4 This is a schematic diagram of the structure of the inner wall auxiliary component of the present invention;

[0041] Figure 5 This is a schematic diagram of the structure of the cold air spraying component of the present invention.

[0042] Explanation of the labels in the diagram:

[0043] 1. Hot melt box; 2. Screw extruder; 3. Forming die sleeve; 4. Die core; 5. Cooling box;

[0044] 6. Cold air spray assembly; 61. Rigid annular tube; 62. Spray nozzle; 63. Fixing rod; 64. Air inlet pipe; 65. Limiting guide; 651. Circular groove; 652. Sliding block; 653. Connecting rod;

[0045] 7. First drive mechanism; 71. Transmission gear; 72. Drive gear; 73. Servo motor;

[0046] 8. Cavity; 9. Internal tube; 10. Controller; 11. Through hole; 12. Connector; 13. Connecting tube;

[0047] 14. Second drive mechanism; 141. First bevel gear; 142. Second bevel gear; 143. Rotating shaft; 144. Drive motor;

[0048] 15. Inner wall auxiliary components; 151. Support rod; 152. Roller;

[0049] 16. Angled machine head. Detailed Implementation

[0050] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0051] Example 1

[0052] Please see Figures 1-5 A fully automatic medical expansion tube hot melt forming device includes a hot melt box 1 and a screw extruder 2. The hot melt box 1 and the screw extruder 2 are connected by a discharge pipe. A controller 10 is installed on the hot melt box 1. An angled die head 16 is connected to the discharge end of the screw extruder 2. A forming die sleeve 3 is threaded to the end of the angled die head 16. A die core 4 is installed inside the forming die sleeve 3. A cooling box 5 is installed on one side of the hot melt box 1. Through openings are opened on both sides of the cooling box 5. The forming die sleeve 3 extends into the cooling box 5 through the through openings.

[0053] This fully automatic medical expansion tube hot melt forming device heat-melts the medical expansion tube material in a hot melt box 1, stirs it evenly with a stirring mechanism on the hot melt box 1, and then extrudes it through a screw extruder 2 into a forming die sleeve 3. Under the traction of the traction device, the expansion tube is cooled and formed by a cooling mechanism in a cooling box 5.

[0054] Please see Figures 2-4 The cooling box 5 is equipped with a cold air spraying assembly 6 that is aligned with the center of the forming mold sleeve 3. The cold air spraying assembly 6 is fitted on the outside of the forming mold sleeve 3. The cooling box 5 is equipped with a first driving mechanism 7 that drives the cold air spraying assembly 6 to rotate. The mold core 4 has a cavity 8. A horizontally arranged built-in tube 9 is inserted inside the forming mold sleeve 3 and on the mold core 4. The built-in tube 9 extends into the cavity 8. Several through holes 11 are opened on the surface of the part of the built-in tube 9 located outside the mold core 4 and inside the forming mold sleeve 3. The built-in tube 9 extends through the mold core 4 to the outside of the forming mold sleeve 3. A connector 12 is connected to the end of the built-in tube 9 located outside the mold core 4. A connecting pipe 13 is provided on the connector 12. The connecting pipe 13 is used to connect to the cold air source.

[0055] The aforementioned cooling mechanism employs a cold air output mechanism on both the inner and outer walls of the extruded expansion tube from the forming die sleeve 3 and the die core 4. This accelerates the cooling efficiency and simplifies the processing of the expansion tube, eliminating the need for subsequent drying and saving cooling time. Furthermore, by setting the first driving mechanism 7 to drive the cold air spraying assembly 6 for cooling the outer wall of the expansion tube to rotate, the cooling of the expansion tube becomes more comprehensive, further improving the cooling effect.

[0056] For cooling the outer wall of the formed expansion tube: cold air is introduced into the auxiliary box with the connecting pipe 13 connected to the cold air source and the connecting head 12 through the inner tube 9 and sprayed onto the inner wall surface of the expansion tube through the through hole 11.

[0057] Cooling of the outer wall of the expansion tube: The cold air source is connected to the cold air spraying component 6 and cold air is sprayed onto the surface of the expansion tube. The cold air spraying component 6 is rotated by the first drive mechanism 7 to achieve cold air spraying at different positions.

[0058] Please see Figure 3 , 5 The cold air spraying assembly 6 includes several rigid annular tubes 61 equidistantly arranged in the cooling box 5 along the extension direction of the forming die sleeve 3. Several nozzles 62 are arranged on the inner side of the rigid annular tubes 61. Multiple fixing rods 63 are fixedly connected between two adjacent rigid annular tubes 61. Multiple fixing rods 63 are also fixedly connected to the outer side of the rigid annular tube 61 farthest from the forming die sleeve 3. The outermost fixing rod 63 extends through the through-hole to the outside of the cooling box 5 and is connected to the first drive mechanism 7. An air inlet pipe 64 is inserted in the through-hole on the side of the cooling box 5 away from the screw extruder 2. The air inlet pipe 64 is connected to each rigid annular tube 61 and is used to connect to the cold air source. A limiting guide 65 for the rotation of the rigid annular tubes 61 is provided in the cooling box 5.

[0059] The cold air spraying assembly 6 connects to a cold air source through an air inlet pipe 64 to deliver cold air into the rigid annular tube 61 and sprays it onto the surface of the expansion tube through a nozzle 62, thereby cooling the expansion tube. The first drive mechanism 7, in conjunction with the limiting guide 65 and the fixing rod 63, enables all rigid annular tubes 61 to rotate, thereby driving the cold air spraying position and improving the cooling effect.

[0060] Among them, such as Figure 2 As shown, the first drive mechanism 7 includes a transmission gear 71, which is located at the through-hole of the cooling box 5 away from the screw extruder 2. The transmission gear 71 is fixedly connected to the fixed rod 63, and a drive gear 72 meshes with the transmission gear 71. A servo motor 73 is fixedly mounted on the cooling box 5, and the output shaft of the servo motor 73 is fixedly connected to the drive gear 72. This first drive mechanism 7 drives the drive gear 72 to rotate forward and backward through the servo motor 73. Through the meshing transmission of the drive gear 72 and the transmission gear 71, the rigid annular tube 61 connected to the transmission gear 71 via the fixed rod 63 rotates forward and backward.

[0061] The cooling box 5 is a horizontally arranged hollow cylindrical structure. The limiting guide 65 includes multiple circular grooves 651 opened on the inner wall of the cooling box 5. Multiple sliders 652 are slidably connected in each circular groove 651. A connecting rod 653 is fixedly connected to each slider 652. The connecting rod 653 is fixedly connected to the fixed rod 63. Through the cooperation of multiple circular grooves 651, sliders 652 and connecting rods 653, the rigid annular tube 61 can be supported and limited and guided.

[0062] In addition, the end of the intake pipe 64 located outside the cooling box 5 is a telescopic flexible hose, which provides room for the intake pipe 64 to rotate with the rigid annular pipe 61, ensuring normal rotation operation.

[0063] Example 2

[0064] Please see Figures 2-4 Based on the above embodiments, in order to improve the cooling effect of the inner wall of the expansion tube, the connector 12 is a rotary connector, and the inner tube 9 is provided with a second drive mechanism 14 to drive its rotation. The inner tube 9 is rotatably connected to the mold core 4. The inner tube 9 can also be rotated through the second drive mechanism 14, thereby realizing the spraying of cold air to different positions on the inner wall.

[0065] The second drive mechanism 14 includes a first bevel gear 141 sleeved on the inner tube 9, a second bevel gear 142 meshing with the bottom of the first bevel gear 141, a rotating shaft 143 fixedly connected to the bottom of the second bevel gear 142, a support plate fixedly installed on the forming mold sleeve 3, a drive motor 144 fixedly installed on the support plate, and the output shaft of the drive motor 144 fixedly connected to the rotating shaft 143.

[0066] The second drive mechanism 14 drives the rotating shaft 143 and the second bevel gear 142 to rotate via the drive motor 144. Through the meshing transmission of the second bevel gear 142 and the first bevel gear 141, it drives the built-in tube 9 to rotate.

[0067] Example 3

[0068] Please see Figure 3 , 4 Based on the above embodiments, an inner wall auxiliary component 15 is provided on the surface of the portion of the built-in tube 9 located outside the mold core 4 and inside the forming mold sleeve 3. With the built-in tube 9 rotating, the inner wall auxiliary component 15 contacts the inner wall of the expansion tube, and the inner wall auxiliary component 15 rotates as the built-in tube 9 rotates, thus smoothing the inner wall and reducing the collapse and unevenness of the inner wall of the expansion tube.

[0069] The inner wall auxiliary component 15 includes two support rods 151 mounted on the outer side of the inner tube 9, and a roller 152 rotatably connected between the two support rods 151. The distance between the outer side wall of the roller 152 and the inner side wall of the molding die 3 is the same as the distance between the outer side wall of the mold core 4 and the inner side wall of the molding die 3.

[0070] The inner wall auxiliary component 15 is connected to the inner wall of the expansion tube by a roller 152 via a strut 151. When the inner tube 9 rotates, the roller 152 rotates and rubs against the inner wall. Combined with the cooling mechanism, it can achieve rapid shaping and sizing.

[0071] The above description represents a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A fully automatic medical expansion tube hot melt forming device, comprising a hot melt box (1) and a screw extruder (2), wherein the hot melt box (1) and the screw extruder (2) are connected by a discharge pipe, and a controller (10) is provided on the hot melt box (1), characterized in that: The discharge end of the screw extruder (2) is connected to an angled die head (16), and the end of the angled die head (16) is threadedly connected to a forming die sleeve (3). A die core (4) is provided inside the forming die sleeve (3). A cooling box (5) is provided on one side of the hot melt box (1). Both sides of the cooling box (5) are provided with through openings. The forming die sleeve (3) extends into the cooling box (5) through the through openings. A cold air spraying assembly (6) is provided inside the cooling box (5) and is aligned with the center of the forming die sleeve (3). The cold air spraying assembly (6) is fitted on the outside of the forming die sleeve (3). A first driving mechanism (7) is provided on the cooling box (5) to drive the cold air spraying assembly (6) to rotate. The mold core (4) has a cavity (8) inside. A horizontally arranged built-in tube (9) is inserted inside the molding sleeve (3) and on the mold core (4). The built-in tube (9) extends into the cavity (8). Several through holes (11) are opened on the surface of the part of the built-in tube (9) located outside the mold core (4) and inside the molding sleeve (3). The built-in tube (9) extends through the mold core (4) to the outside of the molding sleeve (3). A connector (12) is connected to the end of the built-in tube (9) located outside the mold core (4). The connector (12) is provided with a connecting pipe (13), which is used to connect to a cold air source. The connector (12) is a rotary connector, and the built-in tube (9) is provided with a second driving mechanism (14) to drive its rotation. The inner wall auxiliary component (15) is provided on the surface of the part of the inner part of the mold core (4) located outside the mold core (4) and inside the molding mold sleeve (3). The inner wall auxiliary component (15) includes two support rods (151) installed on the outer side of the inner tube (9), and also includes a roller (152) rotatably connected between the two support rods (151). The distance between the outer side wall of the roller (152) and the inner side wall of the molding sleeve (3) is the same as the distance between the outer side wall of the mold core (4) and the inner side wall of the molding sleeve (3).

2. The fully automatic medical expansion tube hot-melt forming device according to claim 1, characterized in that: The cold air spraying assembly (6) includes several rigid annular tubes (61) arranged at equal intervals along the extension direction of the forming die (3) in the cooling box (5). Several nozzles (62) are arranged on the inner side of the rigid annular tubes (61). Multiple fixing rods (63) are fixedly connected between two adjacent rigid annular tubes (61). Multiple fixing rods (63) are also fixedly connected to the outer side of the rigid annular tube (61) farthest from the forming die (3). The outermost fixing rod (63) extends through the through-hole to the outside of the cooling box (5) and is connected to the first drive mechanism (7). An air inlet pipe (64) is inserted in the through-hole on the side of the cooling box (5) away from the screw extruder (2). The air inlet pipe (64) is connected to each rigid annular tube (61). The air inlet pipe (64) is used to connect to the cold air source. A limiting guide (65) for the rotation of the rigid annular tubes (61) is provided in the cooling box (5).

3. The fully automatic medical expansion tube hot-melt forming device according to claim 2, characterized in that: The first drive mechanism (7) includes a transmission gear (71), which is located in the cooling box (5) at the through-hole away from the screw extruder (2). The transmission gear (71) is fixedly connected to the fixed rod (63). A drive gear (72) meshes on the transmission gear (71). A servo motor (73) is fixedly installed on the cooling box (5). The output shaft of the servo motor (73) is fixedly connected to the drive gear (72).

4. The fully automatic medical expansion tube hot-melt forming device according to claim 1, characterized in that: The second drive mechanism (14) includes a first bevel gear (141) sleeved on the inner tube (9), a second bevel gear (142) meshing with the bottom of the first bevel gear (141), a rotating shaft (143) fixedly connected to the bottom of the second bevel gear (142), a support plate fixedly installed on the forming mold sleeve (3), a drive motor (144) fixedly installed on the support plate, and the output shaft of the drive motor (144) fixedly connected to the rotating shaft (143).

5. The fully automatic medical expansion tube hot-melt forming device according to claim 2, characterized in that: The end of the air intake pipe (64) located outside the cooling box (5) is a telescopic hose.

6. The fully automatic medical expansion tube hot-melt forming device according to claim 2, characterized in that: The cooling box (5) is a horizontally arranged hollow cylindrical structure. The limiting guide (65) includes multiple circular grooves (651) opened on the inner wall of the cooling box (5). Multiple sliders (652) are slidably connected in each circular groove (651). A connecting rod (653) is fixedly connected to each slider (652). The connecting rod (653) is fixedly connected to the fixing rod (63).

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