Groove drainage tube extrusion device and extrusion molding method thereof

Abstract

The invention belongs to the field of medical instrument manufacturing and processing, and particularly relates to a groove drainage tube extrusion device and an extrusion molding method thereof.The groove drainage tube extrusion device comprises an ejector pin control system at the top of the groove drainage tube extrusion device, an ejector pin at the bottom of the ejector pin control system and an extrusion control system at the bottom of the ejector pin; the ejector pin control system comprises a first ejector pin, a second ejector pin and a third ejector pin which are arranged in a sleeved mode from outside to inside and is provided with an air pump for controlling the first ejector pin and the third ejector pin, two groove drainage tubes can be extruded at the same time by adjusting vertical displacement of the first ejector pin and the third ejector pin in the extrusion process, the two groove drainage tubes are integrally formed, clinical problems such as tube breakage and blocking are avoided, and the production efficiency is improved. The production efficiency of a supplier is improved, the production cost is reduced, the drainage section is provided with the groove, the drainage section cannot be blocked due to tissue adsorption, the transition section is arranged between the drainage section and the connecting section, the product is integrally formed, and the problem of tube breakage caused by adhesion is effectively avoided.

Description

Technical Field

[0001] The invention belongs to the field of medical device manufacturing and processing, and particularly relates to a groove drainage tube extrusion device and an extrusion molding method thereof. Background Art

[0002] Surgical drainage is the process of directing pus, blood, and fluids accumulated between tissues or within body cavities to the outside of the body. This reduces pressure, eliminates dead space, alters the microbial environment at the site of infection, inhibits local bacterial growth, prevents the spread of infection, promotes inflammation resolution, ensures proper healing of the wound, and reduces the occurrence of complications. Drainage tubes are widely used in departments such as general surgery, orthopedic trauma, microsurgery, joint surgery, spinal surgery, bone surgery, and urology. They are used to drain wounds, the chest cavity, the brain cavity, the gastrointestinal tract, and the biliary tract.

[0003] Silicone rubber, due to its excellent biocompatibility, has become the preferred material for drainage tubes. However, circular perforated drainage tubes are prone to clogging during actual use. Adjusting the drainage tube to a grooved shape can effectively avoid tissue clogging. However, the grooved and connected sections are currently often fixed by bonding, which frequently causes tube breakage during clinical use. Furthermore, the demand for silicone drainage tubes is currently high, and the current production process for silicone tubes generally involves one extruder producing only one drainage tube. This production efficiency no longer meets market demand. Therefore, a production process that can improve the efficiency of silicone tube production is urgently needed. Summary of the Invention

[0004] In response to the existing problems of groove drainage tube breakage and low extrusion molding efficiency, the present invention provides a groove drainage tube extrusion device and an extrusion molding method thereof. By arranging No. 1 ejector pin, No. 2 ejector pin, and No. 3 ejector pin of different shapes and controlling the up and down movement of No. 1 ejector pin and No. 3 ejector pin, the one-piece extrusion production of the groove drainage tube is realized, and two drainage tubes of the same specification can be obtained at the same time in one production, thereby improving production efficiency.

[0005] The present invention first provides a groove drainage tube extrusion device, comprising an ejector pin control system at the top of the groove drainage tube extrusion device, an ejector pin at the bottom of the ejector pin control system, and an extrusion control system at the bottom of the ejector pin; The ejector control system includes an ejector fixing assembly No. 1 for fixing ejector No. 1, an ejector fixing assembly No. 2 for fixing ejector No. 2, and an ejector fixing seat No. 3 for fixing ejector No. 3, as well as an air pump No. 3 for controlling the up and down movement of ejector No. 3 and an air pump No. 1 for controlling the up and down movement of ejector No. 1. The ejector No. 2 is arranged inside the ejector No. 1, and the ejector No. 3 is arranged inside the ejector No. 2. The end of No. 3 ejector pin is a cross structure, the end of No. 2 ejector pin is a hollow cross groove structure that matches No. 3 ejector pin, and the end of No. 1 ejector pin is a hollow structure with four side grooves. The cross structure of No. 3 ejector pin cooperates with the hollow cross groove of No. 2 ejector pin, and the inner diameter of No. 1 ejector pin is consistent with the outer diameter of No. 2 ejector pin.

[0006] Among them: the ejector pin control system on the top of the groove drainage tube extrusion device is used to control the movement of the ejector pin; The ejector pin at the bottom of the ejector control system is used to control the cross-sectional shape of the extrusion pipe; The extrusion control system at the bottom of the ejector pin is used to control the path of silicone extrusion to ensure product molding.

[0007] The inner diameters of ejector pin No. 3, ejector pin No. 2, and ejector pin No. 1 cooperate with each other. Specifically, the cross structure of ejector pin No. 3 cooperates with the hollow cross groove of ejector pin No. 2, and the inner diameter of ejector pin No. 1 is consistent or substantially consistent with the outer diameter of ejector pin No. 2. The inner hole of ejector pin No. 1 can ensure that ejector pin No. 2 can enter and pass through smoothly, and the inner hole of ejector pin No. 2 can ensure that ejector pin No. 3 can enter and pass through smoothly.

[0008] The combination of No. 2 ejector pin and No. 3 ejector pin is used to control the molding of the connecting section; No. 2 ejector pin alone can be used to control the molding of the transition section; the combination of No. 1 ejector pin and No. 2 ejector pin can be used to control the molding of the drainage section.

[0009] Preferably, the No. 1 ejector fixing assembly, the No. 2 ejector fixing assembly and the No. 3 ejector fixing seat are each provided with two groups of No. 1 ejectors, No. 2 ejectors and No. 3 ejectors facing each other.

[0010] Preferably, the No. 3 air pump is arranged at the top of the groove drainage tube extrusion device, the No. 3 air pump is fixedly provided with a first base at the bottom, a through hole is provided on the first base, the No. 3 needle connecting arm passes through the through hole of the first base and is fixedly connected to the lifting rod at the bottom of the No. 3 air pump, the bottom of the No. 3 needle connecting arm is fixedly connected to the No. 3 ejector fixing seat, and two No. 3 ejectors are detachably fixed on both sides of the No. 3 ejector fixing seat; Air pump No. 3 can be used to control the up and down movement of ejector pin No. 3.

[0011] Preferably, through holes cooperating with ejector No. 3 are provided on both sides of the No. 3 ejector fixing seat, and the upper end of the No. 3 ejector is detachably fixed to the through hole of the No. 3 ejector fixing seat, and passes through the through hole of the No. 2 ejector fixing assembly and the through hole of the No. 1 ejector fixing assembly in sequence, and its bottom end is arranged in the center hole of the extrusion seat. The diameter of the center hole of the extrusion seat is the same as the outer diameter of the No. 1 ejector, and the difference between the diameter of the center hole of the extrusion seat and the outer diameter of the No. 2 ejector is the wall thickness of the connecting section, transition section and drainage section of the groove drainage tube.

[0012] Preferably, threaded holes are opened on both sides of each through hole of the No. 3 ejector fixing seat and bolts are provided, and the No. 3 ejector can be squeezed and fixed by the bolts to ensure that the two No. 3 ejectors can move synchronously after being fixed.

[0013] Preferably, the No. 3 ejector fixing seat is supported above the gantry, and the gantry is provided with a through hole that cooperates with the No. 3 ejector, and the No. 3 ejector passes through the gantry from top to bottom through the through hole; the gantry can serve as a supporting structure for the No. 3 ejector fixing seat and play a supporting role; The gantry is fixedly connected to the No. 2 ejector fixing assembly through a fixing component at the bottom. The fixing component is preferably a cylinder fixedly arranged at the bottom of the gantry. The No. 2 ejector fixing assembly is provided with a through hole corresponding to the cylinder. A disk with a diameter greater than that of the cylinder is provided at the bottom of the cylinder. The No. 2 ejector fixing assembly is pressed on the disk by gravity, and the bottom of the No. 2 ejector fixing assembly is detachably fixedly connected to the two opposite No. 2 ejectors.

[0014] Preferably, in the ejector control system, air pump No. 1 is located below air pump No. 3, a second base is fixed to the bottom of air pump No. 1, air pump No. 1 is fixedly connected to the connecting rod through needle connecting arm No. 1, the needle connecting arm No. 1 is fixedly connected to the lifting rod of air pump No. 1, and the connecting rod passes through the through hole of the gantry and the other end is fixedly connected to the ejector fixing assembly No. 1, there are two connecting rods and each is fixedly connected to a ejector fixing assembly No. 1, and the bottom of the ejector fixing assembly No. 1 is detachably fixedly connected to the two opposite No. 1 ejectors.

[0015] Preferably, an upper fixing assembly of No. 2 ejector is fixedly provided above the No. 2 ejector fixing assembly, and a lower fixing assembly of No. 2 ejector is fixedly provided below the No. 2 ejector. The No. 2 ejector is detachably fixedly connected to the lower fixing assembly of No. 2 ejector. A head is provided at the upper end of the No. 2 ejector, and grooves are provided on both sides of the connection with the No. 2 ejector for cooperating with the two heads of No. 2 ejectors. The detachable fixed connection is achieved through the cooperation of the head and the groove. The two No. 1 ejector fixing assemblies are each fixed with a No. 1 ejector upper fixing assembly above them, and a No. 1 ejector lower fixing assembly is each fixed with a No. 1 ejector lower fixing assembly below them. The No. 1 ejector is detachably fixedly connected to the No. 1 ejector lower fixing assembly. A head is provided at the upper end of the No. 1 ejector, and a groove is provided at the connection between the No. 1 ejector lower fixing assembly and the No. 1 ejector for cooperating with the No. 1 ejector head. The detachable fixed connection is achieved through the cooperation of the head and the groove.

[0016] The bottom cylinder of the gantry is clearance-fitted or thread-fitted with the No. 2 ejector fixing assembly. Preferably, the bottom of the bottom cylinder of the gantry is provided with an external thread, and the bottom of the No. 2 ejector lower fixing assembly is correspondingly provided with an internal thread. The No. 2 ejector lower fixing assembly is fixed to the bottom of the gantry by threaded fit with the cylinder and gravity support of the cylinder bottom disc, and the No. 2 ejector upper fixing assembly is supported above the No. 2 ejector lower fixing assembly; The No. 2 ejector upper fixing assembly and the No. 2 ejector lower fixing assembly are provided with threaded holes on both sides thereof, and bolts are provided in the threaded holes to fix the two together; Threaded holes are correspondingly provided on both lateral sides of the No. 1 ejector upper fixing assembly and the No. 1 ejector lower fixing assembly of each of the two No. 1 ejector fixing assemblies, wherein a bolt is provided in the threaded hole close to the center of the device, an external thread is provided at the bottom end of the connecting rod, and the threaded hole away from the center of the device is threadedly connected to the connecting rod, thereby achieving the fixation of the connecting rod, the No. 1 ejector upper fixing assembly and the No. 1 ejector lower fixing assembly.

[0017] Preferably, the extrusion control system includes an upper plate, a middle plate and a lower plate. The upper plate is provided with a first silicone feed port and a color glue feed port. The first silicone feed port and the color glue feed port are both connected to a conventional extruder, and are used to enter silicone material and color glue material, respectively. The color glue material can form a development line of the pipeline; the middle plate is correspondingly provided with a color glue channel and two second silicone channels. The second silicone channel is for silicone material to pass through and enter the lower plate. The color glue channel is provided with two discharge pipelines. The flow channel design ensures that the color glue in the two discharge pipelines is the same. The extruder is arranged in the cavity at the bottom of the lower plate. The pressure of the extruder can be adjusted according to actual needs according to conventional means in this field, which will not be repeated here.

[0018] As a further preference, the first silicone feed port is opened on the side of the upper plate, and the color glue feed port is opened on the top surface of the upper plate. The reason for this arrangement is to avoid the groove drainage tube extrusion device covering a large area of ​​the first silicone feed port or the color glue feed port during extrusion, thereby affecting the feeding process. The first silicone feed port and the color glue feed port can also be set at other positions that do not affect the feeding.

[0019] The extruder can be a conventional product in this field, which is used to provide feeding pressure for silicone material and color rubber material. The silicone material and color rubber material enter from the silicone feed port and color rubber feed port of the extruder, and enter the extrusion control system of the groove drainage tube extrusion device from the outlet of the extruder and are extruded from the extrusion seat. The groove drainage tube extrusion device is used to shape the silicone material and color rubber material passing through into the required one-piece groove drainage tube, and divide it into two outlets to improve extrusion efficiency.

[0020] Preferably, the lower plate is provided with an adjusting bolt on the side of the extrusion seat for adjusting the position of the extrusion seat and fixing the extrusion seat to ensure that the center hole of the extrusion seat is aligned with the center of the ejector pin. The lower plate is provided with gaps on both sides of the extrusion seat. The gaps are gaps corresponding to the two sides of the extrusion seat in the lower plate extending in the direction of the adjusting bolts. The extension distance is generally on the order of millimeters and can be adjusted according to design requirements.

[0021] The upper plate allows silicone rubber and color rubber to enter and controls the extrusion direction of the silicone rubber and color rubber; the middle plate is used to control the flow direction of the color rubber; and the lower plate is used to mix the rubber and fix the extrusion seat.

[0022] Preferably, a funnel-shaped groove is provided on the upper part of the lower plate, and the funnel-shaped groove corresponds to the position of the discharge pipeline of the second silicone channel and the color glue channel of the middle plate so that they are interconnected after the extrusion control system is assembled, and the bottom of the funnel-shaped groove is connected to the center hole at the top of the extrusion seat.

[0023] Preferably, the second silicone channel includes a central circular hole and a plurality of slots around the circular hole, and guide ribs connected to the circular holes are provided between the slots, which can effectively adjust the flow direction and pressure of the silicone material and improve the uniformity of the extrusion pressure of the two extrusion cavities. Specifically, in the process of feeding the silicone material from the second silicone channel, the guide ribs will stretch and cut the extruded silicone material, so that the silicone material will fill the gaps created by the guide ribs during the feeding process through the second silicone channel, thereby reducing the feeding pressure of the silicone material and providing sufficient space for the entry of the color rubber material. Since the feeding amount of the color rubber material is relatively small compared to the silicone material, the pressure of the color rubber material in the extruder is lower than that of the silicone material, and the feeding channel of the color rubber material is easily blocked by the silicone material. The provision of guide ribs can improve this problem to a certain extent.

[0024] The color glue material passes through the discharge pipe of the color glue channel and enters the lower plate at the position below the second silicone channel and the guide rib. The position of the color glue meets the product requirements, thereby squeezing out two identical drainage tubes.

[0025] The groove drainage tube prepared by extrusion includes a connecting section, a transition section and a drainage section connected in sequence, wherein the connecting section is a hollow circular tube, the transition section is a hollow circular tube with a cross groove inside, and the cross section of the drainage section is four opposite inner grooves open outward.

[0026] The drainage section has grooves, which will prevent the drainage section from being blocked due to tissue adsorption. There is a transition section between the drainage section and the connecting section. The product is molded in one piece, which effectively avoids the problem of tube breakage caused by bonding.

[0027] The present invention further provides an extrusion molding method for the above-mentioned groove drainage tube extrusion device, which specifically comprises the following steps: when in use, ejector pin No. 1, ejector pin No. 2, and ejector pin No. 3 are arranged in the center hole of the extrusion seat; first, ejector pin No. 1 is driven upward by the connecting rod and the ejector pin fixing assembly No. 1 through the air pump No. 1; at this time, ejector pin No. 2 and ejector pin No. 3 are arranged at the position of the center hole of the extrusion seat; the extruder is turned on and silicone material and color rubber material are input into the extrusion control system; the materials are continuously fed during the entire extrusion process to ensure that the groove drainage tube is integrally molded, and the connecting section can be extruded; Then, the No. 3 air pump drives the No. 3 needle connecting arm and the No. 3 ejector fixing seat to move the No. 3 ejector upward. At this time, the No. 1 ejector and the No. 3 ejector are located at the top, and the No. 2 ejector is installed at the center hole of the extruder seat to extrude the transition section. Then, the No. 1 air pump drives the connecting rod and the No. 1 ejector fixing assembly to drive the No. 1 ejector to move downward. At this time, the No. 3 ejector is located at the top. The No. 1 and No. 2 ejectors are installed at the center hole of the extruder seat to extrude the drainage section.

[0028] A vulcanization channel is set downstream of the extruder seat to shape the extruded one-piece groove drainage tube and provide a certain traction force. The temperature of the vulcanization channel is generally adjusted within the range of 100-500℃, and the traction speed is the same as or slightly faster than the extrusion speed of the rubber compound. The actual parameters are adjusted according to the required groove drainage tube diameter and other specifications.

[0029] The present invention has achieved the following beneficial effects: The device and production method proposed in the present invention can extrude two groove drainage tubes simultaneously, and both are integrally formed, which not only avoids clinical problems such as tube breakage and blockage, but also improves the supplier's production efficiency and reduces production costs; The groove drainage tube produced by the present device and method has a drainage section with grooves, which will not be blocked by tissue adsorption. There is a transition section between the drainage section and the connecting section. The product is integrally formed, which effectively avoids the problem of tube breakage caused by bonding. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic diagram of a groove drainage tube extrusion device; Figure 2 This is a schematic diagram of ejector pin No. 1, ejector pin No. 2, and ejector pin No. 3; Figure 3 This is a schematic diagram of the No. 3 ejector pin connection method; Figure 4 This is a schematic diagram of the connection method between ejector pin No. 1 and ejector pin No. 2; Figure 5 This is a schematic diagram of the connection between ejector pin No. 2 and the fixing assembly under ejector pin No. 2; Figure 6 This is a schematic diagram of the connection between ejector pin No. 1 and the fixing assembly under ejector pin No. 1; Figure 7 Schematic diagram of the extrusion control system; Figure 8 Schematic diagram of the middle plate structure; Figure 9 This is a schematic diagram of the flow direction of silicone rubber and color rubber in the extrusion control system. Figure 7 Obtained by mid-A line section; Figure 10 This is a schematic diagram of the ejector pin state and the center hole of the extrusion seat when the connecting section is extruded; Figure 11 This is a schematic diagram of the ejector pin status during the extrusion transition section and the center hole of the extrusion seat; Figure 12 This is a schematic diagram of the ejector pin state and the center hole of the extrusion seat when the drainage section is extruded; Figure 13 Schematic diagram of the production process; Figure 14Schematic diagram of the structure of the prepared groove drainage tube; Figure 15 This is an overall schematic diagram of the groove drainage tube extrusion device.

[0031] Among them: 1 is the ejector control system, 1-1 is the No. 3 air pump, 1-2 is the No. 3 needle connecting arm, 1-3 is the No. 3 ejector fixing seat, 1-4 is the gantry, 1-5 is the No. 2 ejector fixing assembly, 1-5-1 is the No. 2 ejector lower fixing assembly, 1-6 is the No. 1 ejector fixing assembly, 1-6-1 is the No. 1 ejector lower fixing assembly, 1-7 is the No. 1 needle connecting arm, 1-8 is the No. 1 air pump, 1-9 is the connecting rod, 2 is the ejector, 2-1 is the No. 1 ejector, 2-2 is the No. 2 ejector, 2-3 is the No. 3 ejector, 3 is the extrusion control system, 3-1 is the upper plate, 3-2 is the middle plate, 3-2-1 is the second silicone rubber channel, 3-2-2 is the color glue channel, 3-2-3 is the guide rib, 3-3 is the lower plate, 3-4 is the extrusion seat, 3-5 is the adjusting bolt, 3-6 is the first silicone rubber feed port, and 3-7 is the color glue feed port. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be further described below in conjunction with specific embodiments. These embodiments are only used to illustrate the technical solution of the present invention in more detail and should not be construed as limiting the scope of protection of the present invention.

[0033] Device embodiment The present invention first provides a groove drainage tube extrusion device, comprising a pin control system 1 at the top of the groove drainage tube extrusion device, a pin 2 at the bottom of the pin control system 1, and an extrusion control system 3 at the bottom of the pin 2; like Figure 1 and Figure 15 As shown, the ejector control system 1 includes a No. 1 ejector fixing assembly 1-6 for fixing the No. 1 ejector 2-1, a No. 2 ejector fixing assembly 1-5 for fixing the No. 2 ejector 2-2, and a No. 3 ejector fixing seat 1-3 for fixing the No. 3 ejector 2-3, as well as a No. 3 air pump 1-1 for controlling the up and down movement of the No. 3 ejector 2-3 and a No. 1 air pump 1-8 for controlling the up and down movement of the No. 1 ejector 2-1. The No. 2 ejector 2-2 is arranged inside the No. 1 ejector 2-1, and the No. 3 ejector 2-3 is arranged inside the No. 2 ejector 2-2. like Figure 2 As shown, the end of ejector pin 2-3 No. 3 is a cross structure, the end of ejector pin 2-2 No. 2 is a hollow cross groove structure that matches ejector pin 2-3 No. 3, and the end of ejector pin 2-1 No. 1 is a hollow structure with four side grooves; The cross structure of No. 3 ejector pin 2-3 cooperates with the hollow cross groove of No. 2 ejector pin 2-2, and the inner diameter of No. 1 ejector pin 2-1 is consistent with the outer diameter of No. 2 ejector pin 2-2.

[0034] Wherein: the ejector control system 1 at the top of the groove drainage tube extrusion device is used to control the movement of the ejector 2; The ejector pin 2 at the bottom of the ejector pin control system 1 is used to control the cross-sectional shape of the extrusion pipeline; The extrusion control system 3 at the bottom of the ejector pin 2 is used to control the path of silicone extrusion to ensure product molding.

[0035] The inner diameters of the No. 3 ejector 2-3, the No. 2 ejector 2-2, and the No. 1 ejector 2-1 cooperate with each other. Specifically, the cross structure of the No. 3 ejector 2-3 cooperates with the hollow cross groove of the No. 2 ejector 2-2, and the inner diameter of the No. 1 ejector 2-1 is consistent or substantially consistent with the outer diameter of the No. 2 ejector 2-2; the inner hole of the No. 1 ejector 2-1 can ensure that the No. 2 ejector 2-2 can enter and pass through smoothly, and the inner hole of the No. 2 ejector 2-2 can ensure that the No. 3 ejector 2-3 can enter and pass through smoothly.

[0036] The combination of ejector pin No. 2-2 and ejector pin No. 3-3 is used to control the molding of the connecting section; ejector pin No. 2-2 can be used alone to control the molding of the transition section; and the combination of ejector pin No. 1-1 and ejector pin No. 2-2 can be used to control the molding of the drainage section.

[0037] The No. 1 ejector fixing assembly 1-6, the No. 2 ejector fixing assembly 1-5 and the No. 3 ejector fixing seat 1-3 are each provided with two groups of No. 1 ejector 2-1, No. 2 ejector 2-2 and No. 3 ejector 2-3.

[0038] like Figure 3 As shown, air pump No. 3 1-1 is arranged at the top of the groove drainage tube extrusion device, a first base is fixedly arranged at the bottom of air pump No. 3 1-1, a through hole is arranged on the first base, a needle connecting arm No. 3 passes through the through hole of the first base and is fixedly connected to the lifting rod at the bottom of air pump No. 3 1-1, the bottom of needle connecting arm No. 3 is fixedly connected to ejector fixing seat No. 3 1-3, and two ejector pins No. 3 2-3 are detachably fixed on both sides of ejector fixing seat No. 3; Air pump No. 3 1-1 can be used to control the up and down movement of ejector pin No. 3 2-3.

[0039] Through holes cooperating with No. 3 ejector 2-3 are provided on both sides of the No. 3 ejector fixing seat 1-3. The upper end of No. 3 ejector 2-3 is detachably fixed to the through hole of No. 3 ejector fixing seat 1-3, and passes through the through hole of No. 2 ejector fixing assembly 1-5 and the through hole of No. 1 ejector fixing assembly 1-6 in sequence. The bottom end is arranged in the center hole of the extrusion seat 3-4. The diameter of the center hole of the extrusion seat 3-4 is the same as the outer diameter of No. 1 ejector 2-1. The difference between the diameter of the center hole of the extrusion seat 3-4 and the outer diameter of No. 2 ejector 2-2 is the wall thickness of the connecting section, transition section and drainage section of the groove drainage tube.

[0040] Threaded holes are provided on both sides of each through hole of the No. 3 ejector fixing seat 1-3, and bolts are provided. The No. 3 ejector 2-3 can be squeezed and fixed by the bolts to ensure that the two No. 3 ejectors 2-3 can move synchronously after being fixed.

[0041] like Figure 4 As shown, the No. 3 ejector fixing seat 1-3 is supported above the gantry 1-4. The gantry 1-4 is provided with a through hole that cooperates with the No. 3 ejector 2-3. The No. 3 ejector 2-3 passes through the gantry 1-4 from top to bottom through the through hole. The gantry 1-4 can serve as a supporting structure for the No. 3 ejector fixing seat 1-3 and play a supporting role. The gantry 1-4 is fixedly connected to the No. 2 ejector fixing assembly 1-5 through a fixing component at the bottom. The fixing component is preferably a cylinder fixedly arranged at the bottom of the gantry 1-4. The No. 2 ejector fixing assembly 1-5 is provided with a through hole corresponding to the cylinder. A disk with a diameter greater than that of the cylinder is provided at the bottom of the cylinder. The No. 2 ejector fixing assembly 1-5 is pressed on the disk by gravity. The bottom of the No. 2 ejector fixing assembly 1-5 is detachably fixedly connected to the two opposite No. 2 ejectors 2-2.

[0042] In the ejector control system 1, air pump No. 1 1-8 is located below air pump No. 3 1-1, a second base is fixed to the bottom of air pump No. 1-8, air pump No. 1 1-8 is fixedly connected to connecting rod 1-9 through needle connecting arm 1-7, needle connecting arm 1-7 is fixedly connected to the lifting rod of air pump No. 1 1-8, connecting rod 1-9 passes through the through hole of gantry 1-4 and the other end is fixedly connected to ejector fixing assembly No. 1 1-6, there are two connecting rods 1-9 and each is fixedly connected to one ejector fixing assembly No. 1-6, and the bottom of ejector fixing assembly No. 1 1-6 is detachably fixedly connected to two opposite ejectors No. 1 2-1.

[0043] like Figure 5 and Figure 6 As shown, the No. 2 ejector fixing assembly 1-5 is fixedly provided with a No. 2 ejector upper fixing assembly above it, and a No. 2 ejector lower fixing assembly 1-5-1 is fixedly provided below it, and the No. 2 ejector 2-2 is detachably fixedly connected to the No. 2 ejector lower fixing assembly 1-5-1, and the No. 2 ejector 2-2 has a head at the upper end, and the No. 2 ejector lower fixing assembly 1-5-1 is provided with grooves on both sides of the connection with the No. 2 ejector 2-2 for cooperating with the two No. 2 ejector heads 2-2, and the detachable fixed connection is achieved through the cooperation of the head and the groove; The two No. 1 ejector fixing assemblies 1-6 are each fixed with a No. 1 ejector upper fixing assembly above them, and a No. 1 ejector lower fixing assembly 1-6-1 is each fixed with a No. 1 ejector lower fixing assembly 1-6-1 below them. No. 1 ejector 2-1 is detachably fixedly connected to the No. 1 ejector lower fixing assembly 1-6-1. A head is provided at the upper end of No. 1 ejector 2-1, and a groove is provided at the connection between the No. 1 ejector lower fixing assembly 1-6-1 and No. 1 ejector 2-1, which cooperates with the head of No. 1 ejector 2-1. The detachable fixed connection is achieved through the cooperation of the head and the groove.

[0044] The bottom cylinder of the gantry 1-4 is clearance-fitted or thread-fitted with the No. 2 ejector fixing assembly 1-5. Preferably, the bottom of the bottom cylinder of the gantry 1-4 is provided with an external thread, and the bottom of the No. 2 ejector lower fixing assembly 1-5-1 is correspondingly provided with an internal thread. The No. 2 ejector lower fixing assembly 1-5-1 is fixed to the bottom of the gantry 1-4 by threaded fit with the cylinder and gravity support of the bottom disc of the cylinder. The No. 2 ejector upper fixing assembly is supported above the No. 2 ejector lower fixing assembly 1-5-1.

[0045] The No. 2 ejector upper fixing assembly and the No. 2 ejector lower fixing assembly 1-5-1 are provided with threaded holes on both sides thereof, and bolts are provided in the threaded holes to fix the two together; Threaded holes are correspondingly provided on both lateral sides of the No. 1 ejector upper fixing assembly and the No. 1 ejector lower fixing assembly 1-6-1 of each of the two No. 1 ejector fixing assemblies 1-6, wherein a bolt is provided in the threaded hole close to the center of the device, an external thread is provided at the bottom end of the connecting rod 1-9, and the threaded hole away from the center of the device is threadedly connected to the connecting rod 1-9, thereby realizing the fixation of the connecting rod 1-9, the No. 1 ejector upper fixing assembly and the No. 1 ejector lower fixing assembly 1-6-1.

[0046] like Figure 7 、 Figure 8 As shown, the extrusion control system 3 includes an upper plate 3-1, a middle plate 3-2 and a lower plate 3-3. The upper plate 3-1 is provided with a first silicone rubber feed port 3-6 and a color glue feed port 3-7. The first silicone rubber feed port 3-6 and the color glue feed port 3-7 are both connected to a conventional extruder, and are used to enter silicone rubber and color glue, respectively. The color glue can form a developing line of the pipeline; the middle plate 3-2 is correspondingly provided with a color glue channel 3-2-2 and two second silicone rubber channels 3-2-1. The second silicone rubber channel 3-2-1 is for silicone rubber to pass through and enter the lower plate 3-3. The color glue channel 3-2-2 is provided with two discharge pipelines. The flow channel design ensures that the color glue of the two discharge pipelines is the same. The extrusion seat 3-4 is provided in the bottom cavity of the lower plate 3-3. The pressure of the extruder can be adjusted according to actual needs according to conventional means in this field, which will not be repeated here.

[0047] As a further preference, the first silicone feed port 3-6 is opened on the side of the upper plate 3-1, and the color glue feed port 3-7 is opened on the top surface of the upper plate 3-1. The reason for this arrangement is to avoid the groove drainage tube extrusion device covering a large area of ​​the first silicone feed port 3-6 or the color glue feed port 3-7 during extrusion, thereby affecting the feeding process. The first silicone feed port 3-6 and the color glue feed port 3-7 can also be set at other positions that do not affect the feeding.

[0048] Figure 13 The figure shows a process flow chart for production using the present groove drainage tube extrusion device. The extruder can be a conventional product in this field, which is used to provide feed pressure for silicone material and color rubber material. The silicone material and color rubber material enter from the silicone feed port and color rubber feed port of the extruder, and enter the extrusion control system 3 of the groove drainage tube extrusion device from the outlet of the extruder and are extruded from the extrusion seat 3-4. The groove drainage tube extrusion device is used to shape the silicone material and color rubber material that pass through into the required one-piece groove drainage tube, and divide it into two outlets to improve extrusion efficiency.

[0049] The end of the lower plate 3-3 of the groove drainage pipe extrusion device is connected to a vulcanization track. After the groove drainage pipe is extruded from the lower plate 3-3, it enters the vulcanization track for vulcanization.

[0050] The lower plate 3-3 is provided with an adjusting bolt 3-5 on the side of the extrusion seat 3-4, which is used to adjust the position of the extrusion seat 3-4 and fix the extrusion seat 3-4 to ensure that the center hole of the extrusion seat 3-4 is aligned with the center of the ejector 2. The lower plate 3-3 is provided with a gap on both sides of the extrusion seat 3-4. The gap is the gap extending along the direction of the adjusting bolt 3-5 corresponding to the two sides of the extrusion seat 3-4 in the lower plate 3-3. The extension distance is generally on the order of millimeters and can be adjusted according to design requirements.

[0051] The upper plate 3-1 allows silicone rubber and color rubber to enter and controls the extrusion direction of the silicone rubber and color rubber; the middle plate 3-2 is used to control the flow direction of the color rubber; the lower plate 3-3 is used to mix the rubber and fix the extrusion seat 3-4.

[0052] like Figure 9 As shown, a funnel-shaped groove is provided on the upper portion of the lower plate 3-3, and the funnel-shaped groove corresponds to the position of the discharge pipelines of the second silicone channel 3-2-1 and the color glue channel 3-2-2 of the middle plate 3-2 so that they are interconnected after the extrusion control system 3 is assembled, and the bottom of the funnel-shaped groove is connected to the center hole at the top of the extrusion seat 3-4.

[0053] Figure 9 For the Figure 7The cross-section along line A shows the flow direction of the silicone rubber material, with the large arrow indicating the flow direction of the colorant. The flow direction is shown in the figure, driven by the extrusion pressure of the extruder. The guide ribs 3-2-3 in the figure serve to divide the rubber material, preventing excessive pressure during extrusion that could affect the continuity of the colorant.

[0054] The second silicone channel 3-2-1 includes a circular hole in the center and multiple slots around the circular hole. Guide ribs 3-2-3 connected to the circular hole are provided between the slots, which can effectively adjust the flow direction and pressure of the silicone material and improve the uniformity of the extrusion pressure of the two extrusion cavities. Specifically, in the process of feeding the silicone material from the second silicone channel 3-2-1, the guide ribs 3-2-3 will stretch and cut the silicone material being extruded, so that the silicone material will fill the gaps created by the guide ribs 3-2-3 during the feeding process through the second silicone channel 3-2-1, thereby reducing the feeding pressure of the silicone material and providing sufficient space for the entry of the color rubber material. Since the feeding amount of the color rubber material is relatively small than that of the silicone material, the pressure of the color rubber material in the extruder is lower than that of the silicone material, and the feeding channel of the color rubber material is easily blocked by the silicone material. The provision of the guide ribs 3-2-3 can improve this problem to a certain extent.

[0055] The color glue material passes through the discharge pipe of the color glue channel 3-2-2 and enters the lower plate 3-3 below the second silicone channel 3-2-1 and the guide rib 3-2-3. The position of the color glue meets the product requirements, thereby squeezing out two identical drainage tubes.

[0056] like Figure 14 As shown, the groove drainage tube prepared by extrusion includes a connecting section, a transition section and a drainage section connected in sequence, wherein the connecting section is a hollow circular tube, the transition section is a hollow circular tube with a cross groove inside, and the cross section of the drainage section is four opposite inner grooves open outward.

[0057] The drainage section has grooves, which will prevent the drainage section from being blocked due to tissue adsorption. There is a transition section between the drainage section and the connecting section. The product is molded in one piece, which effectively avoids the problem of tube breakage caused by bonding.

[0058] Method Example An extrusion molding method of the groove drainage pipe extrusion device is performed using the device embodiment, such as Figure 10-12 As shown, when in use, ejector pin No. 1 2-1, ejector pin No. 2-2 and ejector pin No. 3 2-3 are arranged in the center hole of the extrusion seat 3-4. First, the connecting rod 1-9 and ejector pin fixing assembly No. 1 1-6 are driven to move ejector pin No. 1 2-1 upward by air pump No. 1-8. At this time, ejector pin No. 2-2 and ejector pin No. 3 2-3 are arranged at the position of the center hole of the extrusion seat 3-4. The extruder is turned on and silicone rubber material and color rubber material are input into the extrusion control system 3. The material is continuously fed during the entire extrusion process to ensure that the groove drainage tube is integrally formed, and the connecting section can be extruded; Then, the No. 3 air pump 1-1 drives the No. 3 needle connecting arm 1-2 and the No. 3 ejector fixing seat 1-3 to move the No. 3 ejector 2-3 upward. At this time, the No. 1 ejector 2-1 and the No. 3 ejector 2-3 are located at the top, and the No. 2 ejector 2-2 is provided at the center hole of the extrusion seat 3-4 to extrude the transition section. Then, the No. 1 air pump 1-8 drives the connecting rod 1-9 and the No. 1 ejector fixing assembly 1-6 to drive the No. 1 ejector 2-1 downward. At this time, the No. 3 ejector 2-3 is located at the top, and the No. 1 ejector 2-1 and No. 2 ejector 2-2 are provided at the center hole of the extrusion seat 3-4 to extrude the drainage section.

[0059] A vulcanization channel is set downstream of the extrusion seat 3-4 to shape the extruded one-piece groove drainage tube and provide a certain traction force. The temperature of the vulcanization channel is generally adjusted within the range of 100-500℃, and the traction speed is the same as or slightly faster than the extrusion speed of the rubber compound. The actual parameters are adjusted according to the required groove drainage tube diameter and other specifications.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any equivalent replacement, modification, etc. made by technicians in this field without any creative work within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A groove drainage tube extrusion device, comprising a pin control system (1) at the top of the groove drainage tube extrusion device, a pin (2) at the bottom of the pin control system (1), and an extrusion control system (3) at the bottom of the pin (2), characterized in that: The ejector control system (1) comprises an ejector fixing assembly (1-6) for fixing ejector (2-1) No. 1, an ejector fixing assembly (1-5) for fixing ejector (2-2) No. 2, and an ejector fixing seat (1-3) for fixing ejector (2-3) No. 3, as well as an air pump (1-1) for controlling the up and down movement of ejector (2-3) No. 3 and an air pump (1-8) for controlling the up and down movement of ejector (2-1) No. 1, wherein ejector (2-2) No. 2 is arranged inside ejector (2-1) No. 1, and ejector (2-3) No. 3 is arranged inside ejector (2-2) No.

2. The end of ejector pin No. 3 (2-3) is a cross structure, the end of ejector pin No. 2 (2-2) is a hollow cross groove structure that matches ejector pin No. 3 (2-3), and the end of ejector pin No. 1 (2-1) is a hollow structure with four side grooves; The cross structure of the No. 3 ejector pin (2-3) cooperates with the hollow cross groove of the No. 2 ejector pin (2-2), and the inner diameter of the No. 1 ejector pin (2-1) is consistent with the outer diameter of the No. 2 ejector pin (2-2).

2. The groove drainage tube extrusion device according to claim 1, characterized in that: The No. 1 ejector pin fixing assembly (1-6), the No. 2 ejector pin fixing assembly (1-5) and the No. 3 ejector pin fixing seat (1-3) are each provided with two groups of No. 1 ejector pins (2-1), No. 2 ejector pins (2-2) and No. 3 ejector pins (2-3) in relative relation.

3. The groove drainage tube extrusion device according to claim 1 or 2, characterized in that: The No. 3 air pump (1-1) is arranged on the top of the groove drainage tube extrusion device, the No. 3 air pump (1-1) is fixedly provided with a first base at the bottom thereof, a through hole is provided on the first base, the No. 3 needle connecting arm (1-2) passes through the through hole of the first base and is fixedly connected to the lifting rod at the bottom of the No. 3 air pump (1-1), the bottom of the No. 3 needle connecting arm (1-2) is fixedly connected to the No. 3 ejector pin fixing seat (1-3), and two No. 3 ejector pins (2-3) are detachably fixedly provided on both sides of the No. 3 ejector pin fixing seat (1-3); Through holes are provided on both sides of the No. 3 ejector fixing seat (1-3) in the horizontal direction and in the upper and lower directions for matching with the No. 3 ejector (2-3). The upper end of the No. 3 ejector (2-3) is detachably fixed to the through hole of the No. 3 ejector fixing seat (1-3) and passes through the through hole of the No. 2 ejector fixing assembly (1-5) and the through hole of the No. 1 ejector fixing assembly (1-6) in sequence. The bottom end of the No. 3 ejector (2-3) is arranged in the center hole of the extrusion seat (3-4). The diameter of the center hole of the extrusion seat (3-4) is the same as the outer diameter of the No. 1 ejector (2-1). The difference between the diameter of the center hole of the extrusion seat (3-4) and the outer diameter of the No. 2 ejector (2-2) is the wall thickness of the connecting section, transition section and drainage section of the groove drainage tube. Threaded holes are provided on both sides of each through hole of the No. 3 ejector fixing seat (1-3) and bolts are provided. The No. 3 ejector (2-3) can be squeezed and fixed by the bolts to ensure that the two No. 3 ejectors (2-3) can move synchronously after being fixed.

4. The groove drainage tube extrusion device according to claim 1 or 2, characterized in that: The No. 3 ejector pin fixing seat (1-3) is supported above the gantry (1-4); a through hole is provided on the gantry (1-4) to match the No. 3 ejector pin (2-3); and the No. 3 ejector pin (2-3) passes through the gantry (1-4) from top to bottom through the through hole; The gantry (1-4) is fixedly connected to the No. 2 ejector fixing assembly (1-5) via a fixing component at the bottom. The fixing component is a cylinder fixedly arranged at the bottom of the gantry (1-4). The No. 2 ejector fixing assembly (1-5) is provided with a through hole corresponding to the cylinder. A disk having a diameter greater than that of the cylinder is provided at the bottom of the cylinder. The No. 2 ejector fixing assembly (1-5) is pressed on the disk by gravity. The bottom of the No. 2 ejector fixing assembly (1-5) is detachably fixedly connected to two opposite No. 2 ejectors (2-2).

5. The groove drainage tube extrusion device according to claim 1 or 2, characterized in that: In the ejector control system (1), air pump No. 1 (1-8) is located below air pump No. 3 (1-1), a second base is fixed to the bottom of air pump No. 1 (1-8), air pump No. 1 (1-8) is fixedly connected to a connecting rod (1-9) via a needle connecting arm No. 1 (1-7), the needle connecting arm No. 1 (1-7) is fixedly connected to a lifting rod of air pump No. 1 (1-8), the connecting rod (1-9) passes through a through hole of a gantry (1-4) and the other end is fixedly connected to an ejector fixing assembly No. 1 (1-6), there are two connecting rods (1-9), each of which is fixedly connected to one ejector fixing assembly No. 1 (1-6), and the bottom of the ejector fixing assembly No. 1 (1-6) is detachably fixedly connected to two opposite ejectors No. 1 (2-1); The No. 2 ejector fixing assembly (1-5) is fixedly provided with a No. 2 ejector upper fixing assembly above and a No. 2 ejector lower fixing assembly (1-5-1) below. The No. 2 ejector (2-2) is detachably fixedly connected to the No. 2 ejector lower fixing assembly (1-5-1). The No. 2 ejector (2-2) is provided with a head at the upper end. The No. 2 ejector lower fixing assembly (1-5-1) is provided with grooves at the connection points with the No. 2 ejector (2-2) on both sides, which are matched with the heads of the two No. 2 ejectors (2-2). The detachable fixed connection is achieved through the cooperation between the heads and the grooves. The two No. 1 ejector fixing assemblies (1-6) are each fixedly provided with a No. 1 ejector upper fixing assembly above and a No. 1 ejector lower fixing assembly (1-6-1) below; the No. 1 ejector (2-1) is detachably fixedly connected to the No. 1 ejector lower fixing assembly (1-6-1); the No. 1 ejector (2-1) has a head at its upper end; a groove is provided at the connection between the No. 1 ejector lower fixing assembly (1-6-1) and the No. 1 ejector (2-1) to achieve a detachable fixed connection through the cooperation of the head and the groove; the bottom cylinder of the gantry (1-4) is clearance-fitted or thread-fitted with the No. 2 ejector fixing assembly (1-5); The No. 2 ejector upper fixing assembly and the No. 2 ejector lower fixing assembly (1-5-1) are both provided with threaded holes on both sides thereof, and bolts are provided in the threaded holes to fix the two together; Threaded holes are correspondingly provided on both lateral sides of the No. 1 ejector upper fixing assembly and the No. 1 ejector lower fixing assembly (1-6-1) of each of the two No. 1 ejector fixing assemblies (1-6), wherein a bolt is provided in the threaded hole on the side close to the center of the device, an external thread is provided at the bottom end of the connecting rod (1-9), and the threaded hole on the side away from the center of the device is threadedly connected to the connecting rod (1-9).

6. The groove drainage pipe extrusion device according to claim 5, characterized in that: The bottom of the bottom cylinder of the gantry (1-4) is provided with an external thread, and the bottom of the No. 2 ejector lower fixing assembly (1-5-1) is correspondingly provided with an internal thread. The No. 2 ejector lower fixing assembly (1-5-1) is fixed below the gantry (1-4) by cooperating with the thread of the cylinder and supported by the gravity of the bottom disk of the cylinder. The No. 2 ejector upper fixing assembly is supported above the No. 2 ejector lower fixing assembly (1-5-1).

7. The groove drainage tube extrusion device according to claim 1 or 2, characterized in that: The extrusion control system (3) comprises an upper plate (3-1), a middle plate (3-2) and a lower plate (3-3); a first silicone feed port (3-6) is provided on the side of the upper plate (3-1), and a color glue feed port (3-7) is provided on the top surface; the first silicone feed port (3-6) and the color glue feed port (3-7) are both connected to the extruder and are used to enter the silicone material and the color glue material respectively; the middle plate (3-2) is provided with a color glue channel (3-2-2) and two second silicone channels (3-2-1) respectively; the second silicone channel (3-2-1) allows the silicone material to pass through and enter the lower plate (3-3); the color glue channel (3-2-2) is provided with two discharge pipes; the extruder seat (3-4) is provided in the bottom cavity of the lower plate (3-3); The lower plate (3-3) is provided with an adjusting bolt (3-5) on the side of the extrusion seat (3-4), and the lower plate (3-3) is provided with gaps on both sides of the extrusion seat (3-4), wherein the gaps are gaps extending along the direction of the adjusting bolts on both sides of the extrusion seat (3-4) in the lower plate (3-3).

8. The groove drainage tube extrusion device according to claim 7, characterized in that: A funnel-shaped groove is provided on the upper portion of the lower plate (3-3), and the funnel-shaped groove corresponds to the position of the discharge pipeline of the second silicone channel (3-2-1) and the color glue channel (3-2-2) of the middle plate (3-2), so that they are interconnected after the extrusion control system (3) is assembled, and the bottom of the funnel-shaped groove is connected to the central hole at the top of the extrusion seat (3-4); The second silica gel channel (3-2-1) comprises a central circular hole and a plurality of slots around the circular hole, and guide ribs (3-2-3) connected to the circular hole are provided between the slots; The color glue material enters the lower plate (3-3) at a position below the second silicone rubber channel (3-2-1) and the guide rib (3-2-3) through the discharge pipe of the color glue channel (3-2-2).

9. A method for extruding a grooved drainage tube using the grooved drainage tube extrusion device according to any one of claims 1 to 8, characterized in that: The groove drainage pipe includes a connecting section, a transition section and a drainage section connected in sequence, wherein the connecting section is a hollow circular tube, the transition section is a hollow circular tube with a cross groove therein, and the cross section of the drainage section is four opposite inner grooves open outwards; The specific steps are: Ejector pin No. 1 (2-1), ejector pin No. 2 (2-2) and ejector pin No. 3 (2-3) are arranged at the center hole of the extrusion seat (3-4). First, the connecting rod (1-9) and ejector pin fixing assembly No. 1 (1-6) are driven upward by air pump No. 1 (1-8). At this time, ejector pin No. 2 (2-2) and ejector pin No. 3 (2-3) are arranged at the center hole of the extrusion seat (3-4). The extruder is turned on to input silicone material and color rubber material into the extrusion control system (3). The materials are continuously fed during the entire extrusion process to ensure that the groove drainage tube is integrally formed and the connecting section is extruded. Then, the No. 3 needle connecting arm (1-2) and the No. 3 ejector fixing seat (1-3) are driven by the No. 3 air pump (1-1) to drive the No. 3 ejector (2-3) to move upward. At this time, the No. 1 ejector (2-1) and the No. 3 ejector (2-3) are located at the top, and the No. 2 ejector (2-2) is provided at the position of the center hole of the extrusion seat (3-4) to extrude the transition section; Then, the No. 1 air pump (1-8) drives the connecting rod (1-9) and the No. 1 ejector fixing assembly (1-6) to drive the No. 1 ejector (2-1) to move downward. At this time, the No. 3 ejector (2-3) is located at the top, and the No. 1 ejector (2-1) and the No. 2 ejector (2-2) are provided at the position of the center hole of the extrusion seat (3-4) to extrude the drainage section.

10. The extrusion molding method of the groove drainage pipe according to claim 9, characterized in that: A vulcanizing device is connected below the extrusion seat (3-4) for vulcanizing and molding the drainage tube.

Images