Method for manufacturing macromolecule pipe hole

Abstract

The invention discloses a device and a method for manufacturing a polymer pipe hole. The device comprises a laser, a clamp and an air nozzle, the laser is used for ablating the polymer pipe to manufacture a polymer pipe hole; the clamp is used for fixing the polymer pipe; the gas nozzle is used for spraying protective gas in the process of ablating the polymer pipe by the laser; the clamp is of a symmetrical structure and comprises a fixing hole, a containing groove and a fixing pin. The fixing holes are formed in the two sides of the clamp and used for fixing the clamp to a using platform. The placing groove is formed in the direction from the upper surface of the clamp to the bottom surface of the clamp, the placing groove is in a V shape, and the included angle of the V shape is 60 degrees; the fixing pin is movably arranged on the upper surface of the clamp and used for fixing the macromolecule pipe. By means of the device and the method, combined holes or holes with gradients are machined, and the clinical effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a method for making polymer tube holes. Background Art

[0002] Polymer tubing has been widely used in many fields due to its excellent biocompatibility, chemical stability and physical and mechanical properties. It has important value in the fields of industry, construction, agriculture, electrical and electronic, transportation, etc., especially in the medical field. Polymer tubing is often used in medical devices such as catheters, catheters, and drainage tubes, among which silicone (silicone rubber) and polyvinyl chloride (PVC) are the most common materials. These tubes usually need to be processed into holes of various shapes and sizes according to different medical needs, such as drainage holes and fluid guide holes. The commonly used processing method for polymer tubing holes is the traditional mechanical processing method.

[0003] The existing processing methods of silicone holes have the following problems: Traditional mechanical punching is a contact-type punching method. Traditional punching will result in an uneven surface of the processed holes, extrusion marks, and poor punching will cause deformation. In actual clinical use, it will cause secondary damage to patients and cause extreme discomfort. In traditional mechanical drilling, it is not easy for high-speed rotating tools to punch any hole shape on irregular surfaces, and it is easily limited by the soft, hard, and brittle properties of the material; it is difficult to ensure that the aperture of each polymer tube hole is completely consistent. Inconsistent apertures may lead to uneven flow and affect the drainage effect of the catheter. Traditional mechanical processing methods are usually inefficient, especially for mass production, and cannot meet the needs of efficient and batch production.

[0004] It is not difficult to see that there are still many problems in the prior art, and the existing polymer tube punching method needs to be improved to overcome the defects of the prior art. Summary of the invention

[0005] Therefore, in order to solve the above problems in the prior art, the present invention provides a method for making a hole in a polymer tube.

[0006] The present invention solves the above problems by the following technical means:

[0007] The present invention also provides a method for making a polymer tube hole, comprising:

[0008] S1. Measuring the specification parameters of the polymer tube of the polymer tube hole to be manufactured;

[0009] S2, performing low temperature refrigeration treatment on the polymer tube to be manufactured into the polymer tube hole;

[0010] S3, placing the polymer tube that has been subjected to the low-temperature refrigeration treatment in S2 on an operating platform;

[0011] S4, preparing inert gas, and blowing the inert gas to the operating platform to protect the next step of ablation work;

[0012] S5, calculating the focus of the laser on the silicone catheter to be aimed at for ablation based on the specification parameters measured in S1;

[0013] S6. According to the actual requirement of the polymer tube hole solution, the laser parameters are adjusted. After the adjustment is completed, the polymer tube is ablated by a filling-type layer-by-layer hole-forming method;

[0014] Furthermore, the specification parameters in S1 include: the outer diameter, wall thickness and length of the polymer tube of the polymer tube hole to be made. The specification parameters can be measured using a vernier caliper, and the measurement of the outer diameter can make the focus more accurately aligned. The measurement of the wall thickness can be used to set the number of laser filling and ablation.

[0015] Furthermore, the low temperature refrigeration treatment in S2 is:

[0016] Within 8-12 hours before laser ablation, the polymer tube to be made into a polymer tube hole is carefully refrigerated in an ultra-low temperature refrigerator to make the temperature of the silicone catheter reach -60 to -80° C. When the temperature of the polymer tube reaches -60 to -80° C., it is easier to perform laser filling and ablation on it.

[0017] Furthermore, the light source of the laser in S6 is an infrared picosecond, the light beam emitted is a Gaussian beam, the output wavelength of the laser is 1064nm±50nm; the repetition frequency of the laser is

[0018] 100KHZ-500KHZ, the single pulse energy of the laser is 15uj-35uj.

[0019] Furthermore, the filling-type layer-by-layer pore forming method in S6:

[0020] The filling method is "bow" filling or "circle" filling, the filling spacing is 0.04mm-0.1mm, the scanning speed is 80mm / s-240mm / s, the number of scans is 5-15 times, the depth formed by a single ablation is 0-300um, and the cycle is repeated until perforation. When the polymer tube is ablated by a laser, the most suitable laser removal parameter range for polymer tubes is found between the laser energy being too large and easy to melt and the laser energy being too small and difficult to remove. The parameter range selected by the method of the present invention will not cause a large burn or melt of the polymer tube, and can ensure a good removal effect.

[0021] Furthermore, it also includes:

[0022] S7. After the ablation in S6 is completed, the ablated and perforated polymer tube is placed in an ultrasonic cleaning machine for cleaning. The cleaning time is 5-10 minutes.

[0023] The method for making polymer tubing holes described in the present invention avoids the existing manual mechanical punching method through the mutual combination of laser, fixture and air nozzle, and uses laser filling and ablation to punch holes. The present invention specifically uses an infrared picosecond laser, and the range of the use parameters of the laser is selected. Within the parameter range selected by the present invention, it can ensure that holes with very good effects are formed without melting or burning; and the present invention uses a filling layer-by-layer method to punch holes, which can not only process holes of any complex shape, but also process combined holes or holes with gradients, which can greatly improve the dynamic performance of polymer tubing holes and enhance clinical effects. And the clever placement of the groove design in the present invention can accurately and quickly align the focus. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0025] Figure 1 It is a flow chart of the method for making a polymer tubing hole (i.e., a silicone urinary catheter drainage hole);

[0026] Figure 2 It is a circular fill and arc fill style diagram;

[0027] Figure 3 It is a schematic diagram of the filling-type layer-by-layer pore forming method;

[0028] Figure 4 It is a schematic diagram of processing holes of different shapes by the filling-type layer-by-layer hole-forming method. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be pointed out that the described implementation examples are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Example

[0031] The present invention is described in more detail below:

[0032] like Figure 1 As shown, the present invention also provides a method for making polymer tubular holes according to the above-mentioned device for making polymer tubular holes, comprising:

[0033] S1, measuring the specification parameters of the polymer tube 3 of the polymer tube hole to be manufactured;

[0034] Preferably, the specification parameters in S1 include: the outer diameter, wall thickness and length of the polymer tube 3 of the polymer tube hole to be made. The specification parameters can be measured with a vernier caliper, and the measurement of the outer diameter can make the focus more accurately aligned. The measurement of the wall thickness can be used to set the number of laser filling and ablation.

[0035] Preferably, in order to make the processing and manufacturing of polymer tube holes more efficient, the present invention further comprises: the pre-treatment of the polymer tube includes but is not limited to: analysis of the tube material properties, surface treatment of the tube material, etc.

[0036] Preferably, the analysis of the material properties of the polymer tube includes but is not limited to: analysis of thermal diffusion coefficients, melting points, etc. of different materials, which directly affect the absorption and conduction of laser energy, thereby affecting the efficiency and accuracy of processing (e.g., the low thermal conductivity of silicone allows it to heat up quickly when locally heated, which is conducive to precise laser drilling).

[0037] Preferably, the surface treatment of the polymer tube material includes but is not limited to: cleaning and drying the surface of the polymer tube; the cleaning treatment includes but is not limited to ultrasonic or solvent cleaning (the clean surface can ensure the uniform absorption of laser energy and the accuracy of the hole), and the drying treatment includes but is not limited to: hot air drying or vacuum drying (to prevent residual moisture from being vaporized by heat during processing and affecting the quality and structural integrity of the hole).

[0038] S2, performing low temperature refrigeration treatment on the polymer tube 3 to be made into the polymer tube hole;

[0039] Preferably, the low temperature refrigeration treatment in S2 is:

[0040] Within 8-12 hours before laser ablation, the polymer tube 3 to be made into a polymer tube hole is carefully refrigerated in an ultra-low temperature refrigerator to make the temperature of the polymer tube reach -60 to -80° C. When the tube temperature of the polymer tube 3 reaches -60 to -80° C., it is easier to perform laser filling and ablation on it.

[0041] S3, placing the polymer tube 3 that has been subjected to the low-temperature refrigeration treatment in S2 on an operating platform;

[0042] S4, preparing inert gas, and blowing the inert gas to the operating platform to protect the next step of ablation work;

[0043] S5, calculating the focus of the laser 1 on the polymer tube to be aligned with the specification parameters measured in S1 for ablation;

[0044] S6. According to the actual requirement of the polymer tube hole solution, the laser 1 is parameter adjusted. After the adjustment is completed, the polymer tube 3 is ablated by a filling-type layer-by-layer hole-forming method;

[0045] Preferably, the light source of the laser 1 in S6 is an infrared picosecond, the emitted light beam is a Gaussian beam, the output wavelength of the laser 1 is 1064nm±50nm; the repetition frequency of the laser 1 is 100KHZ-500KHZ, and the single pulse energy of the laser 1 is 15uj-35uj.

[0046] Preferably, the filling-type layer-by-layer pore forming method in S6:

[0047] like Figure 2 and Figure 3 As shown, the filling method is "bow" shaped filling or "circle" shaped filling, the filling spacing is 0.04mm-0.1mm, the scanning speed is 80mm / s-240mm / s, the number of scans is 5-15 times, and the depth formed by a single ablation is 0-300um, which is repeated until perforation. When the polymer tube 3 is ablated by a laser 1, the most suitable parameter range for laser removal of the polymer tube 3 is found between the laser energy that is too large and easy to melt and the laser energy that is too small and difficult to remove. The parameter range selected by the method of the present invention will not cause significant burning and melting of the polymer tube 3, and can ensure a good removal effect. It should be noted that the filling-type layer-by-layer pore-forming method can process thicknesses that are difficult to form in a single time, and can process complex holes with a radial gradient in the thickness direction (such as Figure 4 As shown in the figure), as well as combined holes with different upper and lower shapes, the application scope of this technology has been greatly improved, and the quality and use effect of the holes can be improved.

[0048] Preferably, the method for making a polymer tube hole provided by the present invention further comprises:

[0049] S7, after the ablation in S6 is completed, the ablated and perforated polymer tube 3 is placed in an ultrasonic cleaning machine for cleaning, and the cleaning time is 5-10 minutes.

[0050] In order to make the present invention easier to understand, several embodiments are listed below for further explanation:

[0051] Example 1

[0052] Precondition: the polymer tube 3 is a solid silicone tube, a double-di-tetra-sulfide system, a hardness of 60A, and two circular polymer tube holes with a diameter of 1 mm need to be processed.

[0053] The outer diameter d of the tube measured by S1 is 5 mm, the wall thickness t is 0.9 mm, and the length l is 25 cm.

[0054] Place the pipe in a cleaning tank containing an appropriate amount of solvent, select 95% ethanol as the cleaning agent, and clean for 5 minutes to effectively remove grease, dust and impurities on the surface. Place the cleaned pipe in a vacuum drying oven for 5 minutes. Place the pipe on the laser operating platform, select nitrogen as the protective gas, and send nitrogen at a flow rate of about 50L / min. Select an infrared picosecond laser, and the beam emitted by the infrared picosecond laser 1 is a Gaussian beam, and its wavelength is selected to be 1064nm.

[0055] The polymer tube 3 is refrigerated to -70°C through S2 and S3 and then fixed on the laser operating platform.

[0056] Then, S4, S5 and S6 are performed. After measurement and calculation, the focus is aligned. The focus is the point where the laser reaches the surface of the tube after emission. It can be calculated according to the actual situation. The actual situation of the tube and the specific form of the operating table are taken as the standard. A circle with a diameter of 1mm is drawn at the focus. The laser parameters selected this time are: repetition frequency is 200KHZ, single pulse energy is 22.6uj, filling spacing is 0.08mm, scanning speed is 100mm / s, scanning times is 10 times, single removal thickness is 230um, after single laser removal, vertically lower the laser focus by 230um, repeat the above steps four times, and the circular through hole can be completed. After the processing is completed, enter step S7, put the perforated polymer tube 3 into the ultrasonic cleaning machine for cleaning for 6 minutes and then take it out.

[0057] At this point, the production of the polymer tubing holes is formally completed.

[0058] Example 2

[0059] Precondition: the polymer tube 3 is a solid silicone tube, a double-disulfide system, a hardness of 70A, and needs to be processed into a tapered hole with an upper hole diameter of 12mm and a lower hole diameter of 8mm.

[0060] The outer diameter d of the tube measured by S1 is 4.8 mm, the wall thickness t is 0.8 mm, and the length l is 20 cm.

[0061] Place the pipe in a cleaning tank containing an appropriate amount of solvent, select 95% ethanol as the cleaning agent, and clean for 5 minutes to effectively remove grease, dust and impurities on the surface. Place the cleaned pipe in a vacuum drying oven for 6 minutes. Place the pipe on the laser operating platform, select nitrogen as the protective gas, and send nitrogen at a flow rate of about 40L / min. Select an infrared picosecond laser, and the beam emitted by the infrared picosecond laser 1 is a Gaussian beam, and its wavelength is selected to be 1064nm.

[0062] The polymer tube 3 is refrigerated to -70°C through S2 and S3 and then fixed on the operating platform.

[0063] Then, S4, S5 and S6 are performed. After measurement and calculation, the focus is aligned. The focus is the point where the laser reaches the surface of the tube after emission. It can be calculated according to the actual situation. The actual situation of the tube and the specific form of the operating table are taken as the standard. A circle with a diameter of 1.2mm is drawn at the focus. The laser parameters selected this time are: repetition frequency is 100KHZ, single pulse energy is 15.8uj, filling spacing is 0.08mm, scanning speed is 100mm / s, scanning times are 10 times, and the thickness removed in a single time is 105um. After a single laser removal, the focus is vertically lowered by 105um, and the scanning pattern is changed to a concentric circle with a diameter reduced by 0.5mm. Repeat the above steps eight times to complete a tapered hole with an upper aperture of 12mm and a lower aperture of 8mm. After the processing is completed, enter step S7 and put the perforated polymer tube 3 into an ultrasonic cleaning machine for cleaning for 7 minutes and then take it out.

[0064] At this point, the production of the polymer tubing holes is formally completed.

[0065] Example 3

[0066] Precondition: the polymer tube 3 is a solid silicone tube, a double-di-tetrasulfide system, a hardness of 70A, and needs to be processed into a combined hole with an outer hole in the shape of a racetrack oval, a major axis of 4mm, a minor axis of 1.3mm, a depth of 300um, and an inner hole in the shape of an oval, a major axis of 4mm, a minor axis of 1.3mm, and a depth of 700um.

[0067] The outer diameter of the tube measured by S1 is 5.2 mm, the wall thickness t is 1 mm, and the length l is 30 cm.

[0068] Place the pipe in a cleaning tank containing an appropriate amount of solvent, select 95% ethanol as the cleaning agent, and clean for 5 minutes to effectively remove grease, dust and impurities on the surface. Place the cleaned pipe in a vacuum drying oven for 6 minutes. Place the pipe on the laser operating platform, select nitrogen as the protective gas, and send nitrogen at a flow rate of about 60L / min. Select an infrared picosecond laser, and the beam emitted by the infrared picosecond laser 1 is a Gaussian beam with a wavelength of 1064nm.

[0069] The polymer tube 3 is refrigerated to -70°C through S2 and S3 and then fixed on the operating platform.

[0070] Then, S4, S5 and S6 are performed. After measurement and calculation, the focus is aligned and a runway ellipse with a major axis of 4 mm and a minor axis of 1.3 mm is drawn. The center of the runway ellipse is placed at the focus. First, the laser parameters selected are: repetition frequency of 200KHZ, single pulse energy of 22.6uj, filling spacing of 0.08mm, scanning speed of 160mm / s, number of scans of 10 times, single removal thickness of 150um, after single laser removal, vertically lower the focus by 150um, repeat the above steps twice, and then change the processing pattern to an ellipse with a major axis of 4mm and a minor axis of 1.3mm. Then, the laser parameters selected are: repetition frequency of 200KHZ, single pulse energy of 22.6uj, filling spacing of 0.06mm, scanning speed of 120mm / s, number of scans of 10 times, single removal thickness of 245um, after single laser removal, vertically lower the focus by 150um, repeat the above steps three times, the polymer tube 3 is perforated, and after the processing is completed, enter step S7, put the perforated polymer tube 3 into an ultrasonic cleaning machine for cleaning for 10 minutes and then take it out.

[0071] At this point, the production of the polymer tubing holes is formally completed.

[0072] Obviously, through the description of the above three embodiments, it can be clearly felt that the method for making holes in polymer tubes provided by the present invention avoids the manual machinist punching method in the prior art. The method provided by the present invention is simple to operate, has good preparation effect and short time, and is easy to large-scale and standardized production.

[0073] The method for making holes in polymer tubes described in the present invention avoids the existing manual mechanical punching method by laser, and uses laser filling and ablation to punch holes. The present invention specially uses an infrared picosecond laser, and selects the range of operating parameters of the laser. Within the parameter range selected by the present invention, it can ensure that holes with very good effects are formed without melting or burning; and the present invention uses a filling-type layer-by-layer method to punch holes, which can not only process holes of any complex shape, but also process combined holes or holes with gradients, thereby greatly improving the dynamic performance of the polymer tube holes and enhancing the clinical effects.

[0074] The advantages of the present invention include but are not limited to:

[0075] First, by selecting a suitable laser and suitable laser parameters, in the process of making holes in polymer tubes, there will be no significant burning or melting of the polymer tubes, and a good removal effect can be guaranteed.

[0076] Second, the use of laser filling layer-by-layer hole forming method can process thicknesses that are difficult to form in a single time, and can process complex holes with a radial gradient in the thickness direction, as well as combined holes with different upper and lower shapes, which greatly improves the application scope of this technology and can improve the quality and use effect of the holes.

[0077] References to "one embodiment", "another embodiment", "embodiment", "preferred embodiment", etc. in this specification refer to specific features, structures or characteristics described in conjunction with the example included in at least one embodiment generally described in this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Further, when a specific feature, structure or characteristic is described in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the present invention. Although the present invention is described herein with reference to a number of illustrative examples of the present invention, it should be understood that those skilled in the art can design many other modifications and implementations that fall within the scope and spirit of the principles disclosed in this application. More specifically, within the scope of the present application disclosure, drawings and claims, in addition to the deformation and improvement that can be made to the components and / or layout of the subject combination layout, other uses will also be obvious to those skilled in the art.

Claims

1. A method for making a hole in a polymer tube, characterized in that: include: S1. Measuring the specification parameters of the polymer tube of the polymer tube hole to be manufactured; S2, performing low temperature refrigeration treatment on the polymer tube to be manufactured into the polymer tube hole; S3, placing the polymer tube that has been subjected to the low-temperature refrigeration treatment in S2 on an operating platform; S4, preparing inert gas, and blowing the inert gas to the operating platform to protect the next step of ablation work; S5, calculating the focus of the laser on the silicone catheter to be aimed at for ablation based on the specification parameters measured in S1; S6. According to the actual requirement of the polymer tube hole solution, the laser parameters are adjusted. After the adjustment is completed, the polymer tube is ablated by a filling-type layer-by-layer hole-forming method.

2. The method for making a polymer tube hole according to claim 1, characterized in that: The specification parameters in S1 include: the outer diameter, wall thickness and length of the polymer tube of the polymer tube hole to be manufactured.

3. The method for making a polymer tube hole according to claim 1, characterized in that: The low temperature refrigeration treatment in S2 is: Within 8-12 hours before laser ablation, the polymer tube to be made into the polymer tube hole is carefully refrigerated in an ultra-low temperature refrigerator to make the temperature of the silicone urinary catheter reach -60 to -80°C.

4. The method for making a polymer tube hole according to claim 1, characterized in that: The light source of the laser in S6 is an infrared picosecond, the emitted light beam is a Gaussian beam, the output wavelength of the laser is 1064nm±50nm; the repetition frequency of the laser is 100KHZ-500KHZ, and the single pulse energy of the laser is 15uj-35uj.

5. The method for making a polymer tube hole according to claim 1, characterized in that: The filling-type layer-by-layer pore forming method in S6: The filling method is "bow" shaped filling or "circle" shaped filling, the filling spacing is 0.04mm-0.1mm, the scanning speed is 80mm / s-240mm / s, the number of scans is 5-15 times, the depth formed by a single ablation is 0-300um, and the cycle is repeated until perforation.

6. The method for making a polymer tube hole according to claim 1, characterized in that: Also includes: S7. After the ablation in S6 is completed, the ablated and perforated polymer tube is placed in an ultrasonic cleaning machine for cleaning. The cleaning time is 5-10 minutes.

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