A heat pipe type conformal cooling cold feed extruder barrel structure

Abstract

The present invention relates to the technical field of rubber molding equipment, and discloses a heat pipe type conformal cooling cold feed extruder barrel structure, comprising a barrel body arranged inside the extruder; a connecting pipe connected to the barrel body is provided in the extruder, the barrel body is provided with a screw for conveying raw materials, and the screw extends into the interior of the connecting pipe, and the extruder is connected to the screw by a drive unit provided inside the barrel body; wherein the barrel body comprises an outer barrel and an inner barrel, the inner barrel is mounted on the inner wall of the outer barrel in a damped rotation manner via an annular guide provided on its outer surface, and a cleaning member for cleaning the inner wall of the inner barrel is provided in the outer barrel. The heat pipe type conformal cooling cold feed extruder barrel structure can effectively solve the problem in the prior art that the cleaning of the inner wall of the barrel mostly relies on manual disassembly and cleaning after shutdown, which is not only cumbersome to operate, time-consuming and labor-intensive, but also has an adverse effect on production continuity due to frequent shutdowns.

Description

Technical Field

[0001] The invention relates to the technical field of rubber molding equipment, in particular to a heat pipe type conformal cooling cold feed extruder barrel structure. Background Art

[0002] Cold feed extruders are core equipment for processing polymer materials like rubber and plastics. The performance of their barrel structure directly impacts the quality of raw material plasticization and production efficiency. Traditional cold feed extruder barrels typically utilize a fixed barrel structure, with the screw rotating within the barrel to transport and plasticize the raw material.

[0003] During extended extruder production, residual polymer raw materials and impurity particles can adhere to the inner wall of the barrel, causing material retention, uneven plasticization, and even equipment failure in severe cases. Currently, cleaning the inner wall of the barrel mostly relies on manual disassembly and cleaning after the machine is shut down. This method is not only cumbersome, time-consuming, and labor-intensive, but frequent shutdowns can also adversely affect production continuity. While some equipment is equipped with automatic cleaning mechanisms, most use independent drive devices, which present complex structures, high energy consumption, and insufficient coordination with the screw motion. Summary of the Invention

[0004] In response to the above-mentioned shortcomings of the prior art, the present invention provides a heat pipe type conformal cooling cold feed extruder barrel structure, which can effectively solve the problem in the prior art that the cleaning of the inner wall of the barrel mostly relies on manual disassembly and cleaning after shutdown. This method is not only cumbersome to operate, time-consuming and manpower-consuming, but also frequent shutdowns will have an adverse effect on production continuity.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] The present invention provides a heat pipe type conformal cooling cold feed extruder barrel structure, comprising:

[0007] A barrel body provided inside the extruder;

[0008] The extruder is provided with a connecting pipe connected to the barrel body. The barrel body is provided with a screw for conveying raw materials, and the screw extends into the connecting pipe. The extruder is connected to the screw through a drive unit provided inside the connecting pipe.

[0009] The barrel body comprises an outer barrel and an inner barrel, the inner barrel is mounted on the inner wall of the outer barrel in a damped rotation manner via an annular guide rail provided on its outer surface, and a cleaning piece for cleaning the inner wall of the inner barrel is provided in the outer barrel;

[0010] Among them, a linkage part is provided on the side of the screw close to the driving unit. When the driving unit drives the screw to rotate in the opposite direction, the linkage part is triggered and started, thereby driving the outer cylinder to rotate around the central axis of the inner cylinder, and the cleaning part cleans the inner wall of the inner cylinder as the outer cylinder rotates.

[0011] Furthermore, the outer surface of the connecting pipe is fixedly connected to a hopper connected to an external feeding device, a discharge pipe is provided on the circumferential outer surface of the connecting pipe, the discharge pipe is provided directly below the hopper, a solenoid valve is provided on the outer surface of the discharge pipe, and a heating element is detachably installed on the outer surface of the outer cylinder, and a plurality of heating elements are provided and distributed in an array along the central axis of the outer cylinder.

[0012] Furthermore, the linkage part includes a mounting plate fixedly connected to the end of the connecting pipe, and the mounting plates are provided with two and are symmetrically distributed along the center of the connecting pipe. One mounting plate away from the driving unit is rotatably connected to a sleeve fixedly connected to the outer surface of the outer cylinder through an annular groove opened on its surface, and a mounting plate close to the driving unit is rotatably connected to a mounting seat fitted with the outer surface of the screw through an annular groove opened on its surface, and the outer surfaces of the mounting seat and the sleeve are respectively fixedly connected to gear rings.

[0013] Furthermore, the connecting pipe is rotatably connected to a rotating shaft via a bracket arranged on the outer surface of the connecting pipe, and the end of the rotating shaft is fixedly connected to a gear meshing with the ring gear.

[0014] Furthermore, the screw is rotatably connected to a pawl via a pin arranged on its outer surface, and two pawls are provided and distributed centrally and symmetrically along the central axis of the screw, and a ratchet wheel that fits the pawl is fixedly connected in the mounting seat.

[0015] Furthermore, the cleaning piece includes a notch formed on the inner wall of the inner cylinder, a scraper is provided in the notch, and the scraper is arc-shaped, and the scraper is detachably mounted with a counterweight rod through a mounting hole formed inside the scraper.

[0016] Furthermore, the outer cylinder is slidably connected to a support plate through a guide groove opened on its inner wall, and two support plates are provided and symmetrically distributed along the center of the outer cylinder. The support plate is connected to the inner wall of the guide groove through an elastic plate arranged at its bottom, and the elastic plate is made of memory alloy material.

[0017] Furthermore, the scraper is fixedly connected to a mounting shaft that passes through the outside of the support plate through a mounting groove provided on its outer surface, and a torsion spring is sleeved on the outer surface of the mounting shaft. Two torsion springs are provided and are symmetrically distributed along the center of the mounting shaft.

[0018] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0019] The present invention is provided with a linkage part and a cleaning part. When the barrel body needs to be cleaned, the driving unit drives the screw to rotate in the opposite direction, drives the mounting seat to rotate through the linkage part, and drives the outer barrel to rotate around the inner barrel through the transmission between the gear and the gear ring. The scraper in the outer cylinder generates centrifugal force as it rotates, overcomes the preload of the torsion spring, and fits against the inner wall of the inner cylinder to scrape off the attached raw material residue and impurities. During the cleaning process, the axial thrust generated by the reverse rotation of the screw discharges the impurities through the discharge pipe. There is no need to disassemble the barrel body, and the inner wall of the inner cylinder is automatically cleaned, without stopping for manual operation. The linkage uses the kinetic energy of the reverse rotation of the screw to drive the outer cylinder to rotate through the mechanical transmission between the pawl, ratchet, ring gear, gear, and sleeve, without the need for additional motor or drive device. During forward production, the pawl and ratchet are disengaged, the outer cylinder is stationary, and only the screw rotates. During reverse cleaning, the linkage is automatically triggered, and the inner wall of the inner cylinder is automatically cleaned through the linkage and cleaning parts, avoiding the tedious operation of traditional shutdown and disassembly for cleaning, and ensuring production continuity. At the same time, the scraper is connected to the support plate through the mounting shaft. When the outer cylinder rotates, the counterweight rod generates centrifugal force as the speed increases. When the centrifugal force exceeds the preload of the torsion spring, the scraper rotates around the axis of the mounting shaft, and its shear surface fits tightly against the inner wall of the inner cylinder. The higher the speed, the greater the fitting pressure, ensuring that stubborn residues can be effectively scraped off under different working conditions, and the cleaning effect is dynamically adjusted according to demand. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0021] Figure 1 This is a schematic diagram of the main three-dimensional structure of an embodiment of the present invention;

[0022] Figure 2 Schematic diagram of the cross-sectional structure of the barrel body according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic structural diagram of a cleaning member according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the three-dimensional separation structure of the cleaning piece according to an embodiment of the present invention;

[0025] Figure 5 For the embodiment of the present invention Figure 4 A schematic diagram of the partially enlarged structure at point A in the middle;

[0026] Figure 6 This is a schematic diagram of the three-dimensional separation structure of the connecting pipe, the mounting plate and the linkage parts according to an embodiment of the present invention;

[0027] Figure 7 For the embodiment of the present invention Figure 6 A schematic diagram of the structure with a partial enlargement at point B in the middle;

[0028] Figure 8 Schematic diagram of the three-dimensional separation structure of the pawl and the screw according to an embodiment of the present invention;

[0029] Figure 9 It is a schematic diagram of the three-dimensional state transformation structure of the scraper according to an embodiment of the present invention.

[0030] The numbers in the figure represent: 1. barrel body; 11. outer barrel; 12. inner barrel; 2. connecting pipe; 21. hopper; 22. discharge pipe; 3. screw; 4. driving unit; 5. cleaning part; 51. notch; 52. scraper; 53. counterweight rod; 54. support plate; 55. elastic plate; 56. mounting shaft; 57. torsion spring; 6. linkage part; 61. mounting plate; 62. sleeve; 63. mounting seat; 64. ring gear; 65. rotating shaft; 66. gear; 67. pawl; 68. ratchet. DETAILED DESCRIPTION

[0031] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments 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 making any creative efforts shall fall within the scope of protection of the present invention.

[0032] The present invention will be further described below with reference to the embodiments.

[0033] Example:

[0034] See also Figures 1-9 The present invention provides a technical solution: a heat pipe type conformal cooling cold feed extruder barrel structure, comprising:

[0035] A barrel body 1 is provided inside the extruder;

[0036] The extruder is provided with a connecting pipe 2 connected to the barrel body 1. The barrel body 1 is provided with a screw 3 for conveying raw materials, and the screw 3 extends into the connecting pipe 2. The extruder is connected to the screw 3 through a drive unit 4 provided therein.

[0037] The barrel body 1 includes an outer barrel 11 and an inner barrel 12. The inner barrel 12 is mounted on the inner wall of the outer barrel 11 in a damped rotation manner through an annular guide rail provided on its outer surface. A cleaning member 5 for cleaning the inner wall of the inner barrel 12 is provided in the outer barrel 11.

[0038] Among them, a linkage part 6 is provided on the side of the screw 3 close to the driving unit 4. When the driving unit 4 drives the screw 3 to rotate in the opposite direction, the linkage part 6 is triggered and started, thereby driving the outer cylinder 11 to rotate around the central axis of the inner cylinder 12, and the cleaning part 5 cleans the inner wall of the inner cylinder 12 as the outer cylinder 11 rotates.

[0039] The outer surface of the connecting pipe 2 is fixedly connected to a hopper 21 connected to an external feeding device. A discharge pipe 22 is provided on the circumferential outer surface of the connecting pipe 2. The discharge pipe 22 is provided directly below the hopper 21. A solenoid valve is provided on the outer surface of the discharge pipe 22. A heating element is detachably installed on the outer surface of the outer cylinder 11, and a plurality of heating elements are provided and distributed in an array along the central axis of the outer cylinder 11.

[0040] The linkage member 6 includes a mounting plate 61 fixedly connected to the end of the connecting pipe 2, and the mounting plates 61 are provided with two and are symmetrically distributed along the center of the connecting pipe 2. One mounting plate 61 away from the driving unit 4 is rotatably connected to a sleeve 62 fixedly connected to the outer surface of the outer cylinder 11 through an annular groove opened on its surface, and the other mounting plate 61 close to the driving unit 4 is rotatably connected to a mounting seat 63 that fits the outer surface of the screw 3 through an annular groove opened on its surface. The outer surfaces of the mounting seat 63 and the sleeve 62 are respectively fixedly connected to a gear ring 64.

[0041] The connecting pipe 2 is rotatably connected to a rotating shaft 65 via a bracket provided on the outer surface thereof, and the end of the rotating shaft 65 is fixedly connected to a gear 66 meshing with the gear ring 64 .

[0042] The screw rod 3 is rotatably connected to a pawl 67 via a pin arranged on its outer surface. The pawls 67 are provided with two and are centrally symmetrically distributed along the central axis of the screw rod 3 . A ratchet 68 that fits the pawl 67 is fixedly connected to the mounting seat 63 .

[0043] The cleaning member 5 includes a notch 51 formed on the inner wall of the inner cylinder 12 . A scraper 52 is provided in the notch 51 . The scraper 52 is arc-shaped and a counterweight rod 53 is detachably mounted on the scraper 52 through a mounting hole formed therein.

[0044] The outer cylinder 11 is slidably connected to a support plate 54 through a guide groove provided on its inner wall. Two support plates 54 are provided and are symmetrically distributed along the center of the outer cylinder 11. The support plate 54 is connected to the inner wall of the guide groove through an elastic plate 55 provided at its bottom. The elastic plate 55 is made of memory alloy material.

[0045] The scraper 52 is fixedly connected to a mounting shaft 56 that passes through the outside of the support plate 54 through a mounting groove provided on its outer surface, and a torsion spring 57 is sleeved on the outer surface of the mounting shaft 56. There are two torsion springs 57 that are symmetrically distributed along the center of the mounting shaft 56.

[0046] The working principle and advantages of the heat pipe conformal cooling cold feed extruder barrel structure:

[0047] Preheating process of barrel body 1:

[0048] During the preheating phase before the equipment is put into operation, the operator must preheat the extruder's barrel 1 and screw 3. Heating elements installed on the circumferential outer surface of the outer barrel 11 control the temperature rise of the barrel 1 and screw 3. When the real-time temperature feedback value of the heating system reaches the preset process temperature, the heating element automatically stops working. At this point, the temperature field of the inner barrel 12, outer barrel 11, and screw 3 all reach the preheating temperature range required by the process.

[0049] When the temperature of the inner drum 12 rises above the austenite transformation start temperature of the shape memory alloy, the elastic plate 55, made of the shape memory alloy at the bottom of the support plate 54, undergoes a martensite-to-austenite phase transformation. As the temperature continues to rise to the austenite transformation end temperature, the phase transformation is complete, and the elastic plate 55 returns to its initial solid-state phase transformation shape, driving the support plate 54 to produce a directional micro-displacement along the guide groove. This allows the scraper 52 mounted on the support plate 54 to precisely fit the notch 51 on the inner wall of the inner drum 12, thereby creating a continuous and smooth working surface for the inner drum 12.

[0050] It is worth noting that the elastic plate 55 is made of a shape memory alloy material (such as nickel-titanium alloy). In the initial state, the elastic plate 55 is in the martensite phase. Due to the cooling, it undergoes tensile deformation, thereby driving the support plate 54 to move downward, causing the scraper 52 to disengage from the slot 51, and forming a gap between the two (to facilitate the rotation of the scraper 52 during subsequent cleaning). The scraper 52 is located outside the slot 51 on the inner wall of the inner cylinder 12 and does not contact the inner wall of the inner cylinder 12. As the heating unit heats the barrel body 1, the temperature of the inner barrel 12 gradually increases. When the temperature reaches the threshold temperature of the elastic plate 55, the elastic plate 55 is completely transformed into the austenite phase and restored to the initially set "contracted state" shape, pushing the elastic plate 55 to contract and drive the support plate 54 to slightly displace upward along the guide groove of the inner wall of the outer barrel 11 (directional movement) until the scraper 52 is embedded in the notch 51 on the inner wall of the inner barrel 12, so that the scraper 52 can fit into the notch 51 at high temperature and does not participate in the movement. At room temperature, the elastic plate 55 returns to the martensitic tensile state, and the scraper 52 is separated from the notch 51, allowing it to swing as the outer barrel 11 rotates, thereby realizing the scraping function.

[0051] After the preheating process is complete, the external material conveying system injects the rubber raw material to be processed into the hopper 21. At this point, the drive unit 4 drives the screw 3 in a forward rotational motion. Because the pawl 67 on the outer surface of the screw 3 and the ratchet 68 on the inner wall of the outer barrel 11 are not engaged, the outer barrel 11 and the inner barrel 12 maintain a static positioning. Driven by the rotation of the screw 3, the raw material gradually enters the plasticizing area of ​​the inner barrel 12 through the feed section. Combined with the continuous temperature control of the heating element on the circumferential surface of the outer barrel 11, the raw material is converted into a molten state through shear and conductive heating. Finally, under the extrusion force of the screw 3, the molten material passes through the forming die connected to the output end of the barrel body 1, completing the extrusion molding of the rubber product with a predetermined cross-sectional shape.

[0052] It is worth noting that the outer cylinder 11 and the inner cylinder 12 are installed through damping rotation, and the heating element is fixed inside the extruder. The outer cylinder 11 can rotate in the heating element, and the screw 3 rotates forward. When the rubber raw material is produced normally, the inner cylinder 12 remains relatively stationary under the friction of the raw material, ensuring that the screw 3 stably transports the material. When the screw 3 rotates in the opposite direction, the outer cylinder 11 overcomes the damping torque and rotates, thereby driving the scraper 52 to move, which can achieve the dual purpose of fixing the outer cylinder 11 during production and rotating during cleaning.

[0053] Cleaning process of barrel body 1:

[0054] When the barrel body 1 needs to be cleaned, the barrel body 1 is cooled to room temperature. At this time, the elastic plate 55 made of shape memory alloy material is in a tensile deformation state, and the support plate 54 drives the scraper 52 along the guide groove to separate from the notch 51, so that a gap with a set distance is formed between the notch 51 and the scraper 52.

[0055] Under this working condition, the driving unit 4 drives the screw 3 to perform reverse rotation. Through the coordinated action of the ratchet 68 and the pawl 67, given the meshing transmission relationship between the ring gear 64 assembled on the outer surface of the circumference of the mounting seat 63 and the gear 66, and the linkage between the transmission shaft and the other gear 66, the driving sleeve 62 drives the outer cylinder 11 to overcome the damping torque between it and the inner cylinder 12, thereby making the scraper 52 rotate synchronously with the screw 3.

[0056] During the initial rotation phase of the outer cylinder 11, the centrifugal load is relatively low, having not yet reached the preload threshold of the torsion spring 57 mounted on the outer surface of the mounting shaft 56. As the speed of the outer cylinder 11 gradually increases, the centrifugal force acting on the scraper 52, in concert with the counterweight 53, gradually increases. When the centrifugal force exceeds the preload threshold of the torsion spring 57, the scraper 52 undergoes rotational displacement along the central axis of the mounting shaft 56. Because the counterweight 53 is positioned at the edge of the scraper 52, the centrifugal force drives one side of the scraper 52 into close contact with the inner wall of the inner cylinder 12. As the outer cylinder 11 continues to rotate, the scraper 52 scrapes and removes impurities adhering to the inner wall of the inner cylinder 12. During the cleaning operation, the solenoid valve on the outer surface of the discharge pipe 22 is pre-opened, and the axial thrust generated by the reverse rotation of the screw 3 pushes impurities back into the discharge pipe 22, where they are discharged from the inner cylinder 12. After cleaning is complete, the solenoid valve closes to ensure the tightness of the barrel body 1.

[0057] It is worth noting that the inner wall of the connecting pipe 2 on the side close to the plasticizing area adopts a tapered conical structure design. The tapered inner wall forms a tapered flow channel cross-section, which reduces the along-the-line resistance coefficient during the flow of impurities through fluid mechanics optimization, effectively avoiding the risk of material retention and blockage caused by sudden changes in the flow channel cross-section. Under the condition of reverse rotation of the screw 3, the conical structure and the helical surface of the screw 3 constitute a collaborative material guiding mechanism. With the help of its geometric convergence characteristics, the axial thrust of the screw 3 is converted into a radial and axial composite thrust, so that the impurities produce a centripetal convergence effect under the guidance of the conical surface, significantly improving the efficiency of the movement of impurities to the discharge port. In addition, the smooth transition surface of the conical inner wall can also avoid the deposition of impurities caused by traditional right-angle transitions, which affects the normal discharge of impurities from the inner barrel.

[0058] The present invention adopts the linkage member 6 and the cleaning member 5, which has the following advantages:

[0059] Advantage 1: When the barrel body 1 needs to be cleaned, the drive unit 4 drives the screw 3 to rotate in the opposite direction, which in turn drives the mounting base 63 to rotate through the linkage 6. The transmission between the gear 66 and the ring gear 64 causes the outer barrel 11 to rotate around the inner barrel 12. The scraper 52 in the outer barrel 11 generates centrifugal force as it rotates, which overcomes the preload of the torsion spring 57 and fits against the inner wall of the inner barrel 12, scraping off the attached raw material residue and impurities. During the cleaning process, the axial thrust generated by the reverse rotation of the screw 3 discharges the impurities through the discharge pipe 22. There is no need to disassemble the barrel body 1, and the inner wall of the inner barrel 12 is automatically cleaned without stopping the machine for manual operation.

[0060] Advantage 2: The linkage 6 utilizes the reverse rotation kinetic energy of the screw 3 to drive the outer cylinder 11 to rotate through the mechanical transmission between the pawl 67, ratchet 68, ring gear 64, gear 66, and sleeve 62, without the need for an additional motor or drive device. During forward production, the pawl 67 and the ratchet 68 are disengaged, the outer cylinder 11 is stationary, and only the screw 3 rotates. During reverse cleaning, the linkage is automatically triggered, and the inner wall of the inner cylinder 12 is automatically cleaned through the linkage 6 and the cleaning part 5, avoiding the tedious operation of traditional shutdown and disassembly for cleaning, thereby ensuring production continuity.

[0061] Advantage three: adaptive centrifugal force conforms to the surface, resulting in efficient and stable cleaning results. Scraper 52 is connected to support plate 54 via mounting shaft 56. As outer cylinder 11 rotates, counterweight rod 53 generates centrifugal force as the speed increases. When the centrifugal force exceeds the preload of torsion spring 57, scraper 52 rotates around the axis of mounting shaft 56, with its shear surface tightly conforming to the inner wall of inner cylinder 12. The higher the speed, the greater the conforming pressure, ensuring effective removal of stubborn residues under various operating conditions, and the cleaning effect can be dynamically adjusted according to demand.

[0062] Advantage four: The memory alloy spring plate 55 automatically adjusts the position of the scraper 52. During the preheating phase, the heating element in the outer cylinder 11 heats up, raising the temperature of the inner cylinder 12. The memory alloy spring plate 55 at the bottom of the support plate 54 (transforms from martensite to austenite) returns to its original shape, pushing the support plate 54 slightly along the guide groove, allowing the scraper 52 to fit into the notch 51 of the inner cylinder 12, forming a continuous and smooth inner working surface. During production, the scraper 52 is hidden within the notch 51 to avoid interfering with the plasticization of the raw material. After cooling, the spring plate 55 returns to its original shape, separating the scraper 52 from the inner wall, providing space for movement during the cleaning phase.

[0063] Advantage five: The tapered flow channel design reduces impurity retention and improves discharge efficiency. The inner wall of connecting pipe 2 near the plasticizing area adopts a tapered structure, forming a flow channel with a gradually decreasing cross-sectional area. When screw 3 rotates in the opposite direction, the tapered surface converts axial thrust into a combined radial and axial force, causing impurities to converge toward the center of discharge pipe 22, reducing flow resistance. The smooth transition surface avoids material deposition caused by the right-angle structure, and cooperates with the thrust of screw 3 to quickly discharge impurities, reducing the risk of clogging.

[0064] Advantage six: The damped rotating structure of the inner cylinder 12 and the outer cylinder 11 takes into account both stability and flexibility. The inner cylinder 12 is installed on the inner wall of the outer cylinder 11 in a damping manner through an annular guide rail. During forward production, the inner cylinder 12 remains relatively still under the friction of the raw material, ensuring that the screw 3 can stably transport the material. During reverse cleaning, the outer cylinder 11 overcomes the damping torque and rotates, driving the scraper 52 to move, realizing dual-mode switching of "fixed during production and rotating during cleaning", with a stable structure and flexible response.

[0065] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A heat pipe type conformal cooling cold feed extruder barrel structure, characterized in that: include: A barrel body (1) disposed inside the extruder; The extruder is provided with a connecting pipe (2) connected to a barrel body (1), the barrel body (1) is provided with a screw (3) for conveying raw materials, and the screw (3) extends into the interior of the connecting pipe (2), and the extruder is connected to the screw (3) through a driving unit (4) provided therein; The barrel body (1) comprises an outer barrel (11) and an inner barrel (12); the inner barrel (12) is mounted on the inner wall of the outer barrel (11) in a damped rotation manner via an annular guide rail provided on its outer surface; a cleaning member (5) for cleaning the inner wall of the inner barrel (12) is provided in the outer barrel (11); The cleaning member (5) includes a notch (51) provided on the inner wall of the inner cylinder (12), a scraper (52) is provided in the notch (51), and the scraper (52) is designed to be arc-shaped, and the scraper (52) is detachably mounted with a counterweight rod (53) through a mounting hole provided therein, the outer cylinder (11) is slidably connected to a support plate (54) through a guide groove provided on the inner wall thereof, and the support plates (54) are provided with two and are symmetrically distributed along the center of the outer cylinder (11), the support plates (54) are connected to the inner wall of the guide groove through an elastic plate (55) provided at the bottom thereof, and the elastic plate (55) is made of memory alloy material, the scraper (52) is fixedly connected to a mounting shaft (56) penetrating the outer side of the support plate (54) through a mounting groove provided on the outer surface thereof, and a torsion spring (57) is provided on the outer surface of the mounting shaft (56), and the torsion spring (57) is provided with two and is symmetrically distributed along the center of the mounting shaft (56); A linkage member (6) is provided on a side of the screw (3) close to the driving unit (4). When the driving unit (4) drives the screw (3) to rotate in the opposite direction, the linkage member (6) is triggered and started, thereby driving the outer cylinder (11) to rotate around the central axis of the inner cylinder (12), and the cleaning member (5) cleans the inner wall of the inner cylinder (12) as the outer cylinder (11) rotates.

2. The heat pipe conformal cooling cold feed extruder barrel structure according to claim 1, characterized in that: The outer surface of the connecting pipe (2) is fixedly connected to a hopper (21) connected to an external feeding device, and a discharge pipe (22) is provided on the circumferential outer surface of the connecting pipe (2). The discharge pipe (22) is arranged directly below the hopper (21). A solenoid valve is provided on the outer surface of the discharge pipe (22). A heating element is detachably mounted on the outer surface of the outer cylinder (11), and a plurality of heating elements are provided and distributed in an array along the central axis of the outer cylinder (11).

3. The heat pipe conformal cooling cold feed extruder barrel structure according to claim 1, characterized in that: The linkage member (6) includes a mounting plate (61) fixedly connected to the end of the connecting pipe (2), and the mounting plates (61) are provided with two and are symmetrically distributed along the center of the connecting pipe (2). One mounting plate (61) away from the driving unit (4) is rotatably connected to a sleeve (62) fixedly connected to the outer surface of the outer cylinder (11) through an annular groove provided on its surface, and the other mounting plate (61) close to the driving unit (4) is rotatably connected to a mounting seat (63) that fits the outer surface of the screw (3) through an annular groove provided on its surface. The outer surfaces of the mounting seat (63) and the sleeve (62) are respectively fixedly connected to a gear ring (64).

4. The heat pipe conformal cooling cold feed extruder barrel structure according to claim 1, characterized in that: The connecting pipe (2) is rotatably connected to a rotating shaft (65) via a bracket provided on its outer surface, and the end of the rotating shaft (65) is fixedly connected to a gear (66) meshing with the gear ring (64).

5. The heat pipe conformal cooling cold feed extruder barrel structure according to claim 3, characterized in that: The screw rod (3) is rotatably connected to a pawl (67) via a pin provided on its outer surface, and two pawls (67) are provided and are centrally symmetrically distributed along the central axis of the screw rod (3). A ratchet (68) that fits the pawl (67) is fixedly connected to the mounting seat (63).

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