Constant temperature mechanism of extruder screw

Abstract

The invention discloses a constant temperature mechanism of an extruder screw, and relates to the technical field of extruder screw constant temperature, the constant temperature mechanism comprises an extruder body, the extruder body comprises a first motor, the output end of the first motor is fixedly connected with a coupler, one end of the coupler is fixedly connected with a screw, and the extruder body is provided with the constant temperature mechanism; the constant temperature mechanism comprises a temperature sensing unit, the temperature sensing unit is arranged in the screw rod, and the temperature sensing unit is used for monitoring the temperature of the screw rod; the constant-temperature mechanism comprises a constant-temperature mechanism body and a temperature sensing unit, the constant-temperature mechanism body further comprises a cold and hot unit, the cold and hot unit is arranged on the extruder body, and the cold and hot unit is used in cooperation with the temperature sensing unit. And the temperature of the screw rod is timely and quickly adjusted, so that the delay of temperature adjustment is reduced, and the extrusion efficiency of the extruder body is improved.

Description

Technical Field

[0001] This invention relates to the field of extruder screw temperature control technology, specifically to a temperature control mechanism for an extruder screw. Background Technology

[0002] Temperature control of the extruder screw is crucial during extrusion. If the screw is not heated in time, it will lead to insufficient melting of the material, abnormally increased screw load due to friction between the solid material and the screw, and temperature fluctuations and thermal degradation risks caused by subsequent temperature compensation. If the screw is not cooled in time, it will lead to overheating and degradation of the material, as well as viscosity loss and unstable extrusion. Therefore, a constant temperature mechanism is needed to solve these problems.

[0003] Existing extruders heat up the screw directly through an electric heating structure inside the barrel, which makes it difficult to heat the screw interior in a timely manner, thus slowing down the heating rate. When cooling the screw, coolant is usually directly introduced into the screw interior. However, the presence of residual high-temperature coolant inside the screw causes it to mix with the high-temperature coolant when it enters the screw interior, making it difficult to remove the heat from the screw interior in time. This further slows down the cooling rate of the screw, making it difficult to improve the cooling efficiency of the screw and reducing the extrusion efficiency of the extruder.

[0004] Combining the above issues, we find that the existing temperature control mechanisms for extruder screws on the market are difficult to simultaneously avoid the problems mentioned above during use. Even if they can be solved, they require the use of external tools, thus failing to achieve the desired effect. Therefore, we propose a temperature control mechanism for extruder screws. Summary of the Invention

[0005] The purpose of this invention is to provide a temperature control mechanism for an extruder screw to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a constant temperature mechanism for an extruder screw, comprising an extruder body, the extruder body including a first motor, the output end of the first motor being fixedly connected to a coupling, one end of the coupling being fixedly connected to a screw, and a constant temperature mechanism being provided on the extruder body; The temperature control mechanism includes a temperature sensing unit, which is disposed inside the screw and is used to monitor the temperature of the screw. The constant temperature mechanism also includes a heating and cooling unit, which is disposed on the extruder body. The heating and cooling unit works in conjunction with the temperature sensing unit. The heating and cooling unit is used to cool and heat the screw after the temperature sensing unit senses the temperature of the screw. The constant temperature mechanism also includes a venting unit, which is located inside the heating and cooling unit. The venting unit works in conjunction with the heating and cooling unit and is used to vent the remaining water in the screw before the heating and cooling unit switches between hot and cold water.

[0007] Preferably, the temperature sensing unit includes an embedded groove formed in the inner wall of the screw, a temperature probe is fixedly connected to the inner wall of the embedded groove, a first magnetic core ring is fixedly connected to the surface of the extruder body, a second magnetic core ring is fixedly connected to the surface of the screw, the temperature probe is electrically connected to the second magnetic core ring through a wire, the second magnetic core ring is non-contactly sleeved on the inner side of the first magnetic core ring, and the first magnetic core ring and the second magnetic core ring are magnetically connected.

[0008] Preferably, the heating and cooling unit includes a cold water tank and a hot water tank, both of which are fixedly connected to one side of the extruder body. The inner cavities of both the cold water tank and the hot water tank are fixedly connected to inlet pipes. The top ends of the two inlet pipes extend to the tops of the cold water tank and the hot water tank, respectively, and are fixedly connected to flexible hoses. One end of each flexible hose is fixedly connected to a first engaging sleeve. A collector box is fixedly connected to the surface of the extruder body. A metal ring is provided at one end of the first engaging sleeve. An electromagnetic ring is provided on one side of the collector box, and the metal ring is magnetically connected to the electromagnetic ring. A through hole is opened on one side of the collector box, located at the center of the electromagnetic ring. A ring is opened on the inner wall of the screw. The screw has two annular grooves on its surface. One annular groove has a water inlet groove on its inner wall, which is connected to the annular groove. The inner wall of the screw has a return groove and a connecting groove, which are connected to the annular groove through the connecting groove. The other annular groove has an outlet groove on its inner wall, which is connected to the return groove. A rotating ring is rotatably connected to the surface of the screw. The surface of the rotating ring is fixedly connected to the inner wall of the extruder body. An inlet pipe and an outlet pipe are fixedly connected to the surface of the rotating ring. The outlet end of the inlet pipe corresponds to the position of the water inlet groove, and the inlet end of the outlet pipe corresponds to the position of the outlet groove. One end of the inlet pipe is fixedly connected to the bottom of the collector box.

[0009] Preferably, a support plate is fixedly connected to one side of the cold water tank, a water pump is fixedly connected to the top of the support plate, one end of the outlet pipe is fixedly connected to the input end of the water pump, a liquid guide pipe is fixedly connected to the output end of the water pump, and one end of the liquid guide pipe is fixedly connected to one side of the hot water tank.

[0010] Preferably, one end of the first locking cylinder is provided with four receiving slots, and the inner wall of the receiving slot is fixedly connected with a telescopic rod. One end of the inner rod of each of the four telescopic rods is fixedly connected to one side of the metal ring. One side of the current collecting box is provided with a placement slot, and one side of the electromagnetic ring is fixedly connected to the inner wall of the placement slot.

[0011] Preferably, a first spring is slidably sleeved on the surface of the inner rod of the telescopic rod, and the two ends of the first spring are fixedly connected to one end of the outer rod of the telescopic rod and the surface of the metal ring, respectively. A silicone sleeve is fixedly connected to one end of the first engaging cylinder, and the surface of the metal ring is fixedly connected to the inner wall of the silicone sleeve. The telescopic rod, the first spring, and the metal ring are all located in the inner cavity of the silicone sleeve.

[0012] Preferably, the tops of the cold water tank and the hot water tank are fixedly connected to a support frame, the top of the support frame is fixedly connected to a second motor, the output end of the second motor is fixedly connected to a connecting rod, one end of the connecting rod is rotatably connected to the inner wall of the collection box through a bearing, and three connecting blocks are fixedly connected to the surface of the connecting rod, wherein one end of two of the connecting blocks is fixedly connected to the surface of the two first engaging cylinders respectively.

[0013] Preferably, a water filling pipe is fixedly connected to the surface of the cold water tank, and a drain pipe is fixedly connected to the bottom of the hot water tank. One end of both the water filling pipe and the drain pipe is connected to an external water storage structure.

[0014] Preferably, the venting unit includes a second locking cylinder, the surface of which is fixedly connected to one end of another connecting block. One end of the second locking cylinder has a circular hole, and a one-way valve is fixedly connected to the inner wall of the circular hole. The other end of the second locking cylinder is also magnetically connected to the electromagnetic ring through the telescopic rod, the first spring, the metal ring, and the silicone sleeve.

[0015] Preferably, a filter screen is fixedly connected to one end of the second locking cylinder, and the filter screen is used to cover the round hole.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. By setting a temperature sensing unit and embedding the temperature probe inside the screw, the present invention can monitor the screw temperature more quickly and accurately, accelerate the screw temperature adjustment speed, and thus improve the extrusion efficiency of the extruder body.

[0017] 2. This invention provides timely cooling and heating liquids for the screw by setting up a cooling and heating unit. When the temperature probe detects that the screw temperature is too high, cooling liquid is introduced to cool the screw in time. When the temperature probe detects that the screw temperature is too low, high-temperature liquid is introduced to adjust the screw temperature in time, ensuring timely temperature adjustment and guaranteeing stable extrusion results.

[0018] 3. By setting up a venting unit, after the screw has been heated and cooled down and the temperature has been maintained within the standard range, the venting unit can drain the excess liquid in the screw, avoiding the delay in subsequent temperature adjustment caused by residual liquid, thereby improving extrusion efficiency. By setting up a constant temperature mechanism, the speed and accuracy of screw temperature monitoring can be improved, and the screw temperature can be adjusted in a timely and rapid manner, reducing the delay in temperature adjustment and improving the extrusion efficiency of the extruder body. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram showing the distribution of the constant temperature mechanism of the present invention; Figure 3 This is a schematic diagram showing the connection between the first motor, coupling, and screw of the present invention; Figure 4 This is a partial three-dimensional schematic diagram of the heating and cooling unit of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle; Figure 6 This is a three-dimensional schematic diagram of the temperature sensing unit of the present invention; Figure 7 This is a three-dimensional diagram showing the disassembled second locking cylinder of the present invention; Figure 8 This is a schematic diagram showing the disassembled components of the telescopic rod, the first spring, the metal ring, the electromagnetic ring, and the silicone sleeve of the present invention.

[0020] In the diagram: 1. Extruder body; 11. First motor; 12. Coupling; 13. Screw; 2. Thermostatic mechanism; 21. Temperature sensing unit; 2101. Embedded groove; 2102. Temperature probe; 2103. First magnetic core ring; 2104. Second magnetic core ring; 22. Heating and cooling unit; 2201. Cold water tank; 2202. Hot water tank; 2203. Water inlet pipe; 2204. Flexible hose; 2205. First locking sleeve; 2206. Collector box; 2207. Metal ring; 2208. Electromagnetic ring; 2209. Through hole; 2210. Annular groove; 2211. Annular groove; 2212. Water inlet groove; 2213. Return groove ; 2214, Connecting groove; 2215, Outlet groove; 2216, Rotating ring; 2217, Inlet pipe; 2218, Outlet pipe; 2219, Support plate; 2220, Water pump; 2221, Liquid guide pipe; 2222, Receiving tank; 2223, Telescopic rod; 2224, Placement tank; 2225, First spring; 2226, Silicone sleeve; 2227, Support frame; 2228, Second motor; 2229, Connecting rod; 2230, Connecting block; 2231, Water filling pipe; 2232, Drain pipe; 23, Drainage unit; 2301, Second locking cylinder; 2302, Round hole; 2303, One-way valve; 2304, Filter screen. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1: Please refer to Figures 1-8 The present invention provides a technical solution: a constant temperature mechanism for an extruder screw, including an extruder body 1, the extruder body 1 including a first motor 11, the output end of the first motor 11 is fixedly connected to a coupling 12, one end of the coupling 12 is fixedly connected to a screw 13, the first motor 11 provides power for the rotation of the screw 13, the setting of the coupling 12 can reduce the axial force of the screw 13 and increase the stability of the connection between the first motor 11 and the screw 13, and a constant temperature mechanism 2 is provided on the extruder body 1; The constant temperature mechanism 2 includes a temperature sensing unit 21, which is located inside the screw 13 and is used to monitor the temperature of the screw 13. The constant temperature mechanism 2 also includes a heating and cooling unit 22, which is installed on the extruder body 1. The heating and cooling unit 22 works in conjunction with the temperature sensing unit 21. The heating and cooling unit 22 is used to cool and heat the screw 13 after the temperature sensing unit 21 senses the temperature of the screw 13. The constant temperature mechanism 2 also includes a draining unit 23, which is located inside the heating and cooling unit 22. The draining unit 23 works in conjunction with the heating and cooling unit 22 to drain the remaining water in the screw 13 before the heating and cooling unit 22 switches between hot and cold water.

[0023] As a further definition of the constant temperature mechanism 2 of the present invention, the temperature sensing unit 21 includes an embedding groove 2101 formed in the inner wall of the screw 13. A temperature probe 2102 is fixedly connected to the inner wall of the embedding groove 2101. A first magnetic core ring 2103 is fixedly connected to the surface of the extruder body 1, and a second magnetic core ring 2104 is fixedly connected to the surface of the screw 13. The temperature probe 2102 is electrically connected to the second magnetic core ring 2104 through a wire. The second magnetic core ring 2104 is non-contactly sleeved inside the first magnetic core ring 2103. The first magnetic core ring 2103 and the second magnetic core ring 2104 are magnetically connected. By setting the temperature sensing unit 21 and embedding the temperature probe 2102 inside the screw 13, the temperature of the screw 13 can be monitored more quickly and accurately, the speed of adjusting the temperature of the screw 13 is accelerated, and the extrusion efficiency of the extruder body 1 is improved.

[0024] The specific implementation of this embodiment is as follows: When the extruder body 1 is working, the electric heating structure built into the extruder body 1 is activated through the built-in power control system, which heats the periphery of the screw 13. At the same time, high-temperature liquid is introduced into the interior of the screw 13 through the heating and cooling unit 22 to synchronously heat the interior of the screw 13, thus accelerating the heating rate of the screw 13. At this time, the temperature measuring probe 2102 embedded in the groove 2101 monitors the temperature of the screw 13. When the temperature of the screw 13 reaches the set temperature, material is introduced to perform extrusion. The first motor 11 is started, which drives the coupling 12 to rotate, and the coupling 12 drives the screw 13 to rotate. To achieve material conveying, the temperature probe 2102 is energized through wires to the second magnetic core ring 2104 and the first magnetic core ring 2103. The second magnetic core ring 2104 and the first magnetic core ring 2103 form a closed loop device composed of magnetic material and conductive circuit. Energy is transferred through the interaction of magnetic field and current, thereby achieving the purpose of conduction. At the same time, the arrangement of the first magnetic core ring 2103 and the second magnetic core ring 2104 avoids the situation where the traditional wires are entangled and broken due to the rotation of the screw 13, ensuring the stable operation of the temperature probe 2102. This enables real-time monitoring of the temperature of the screw 13 and accelerates the response speed of the temperature adjustment of the screw 13.

[0025] Example 2: Please refer to Figures 1-8 The present invention provides a technical solution: a constant temperature mechanism for an extruder screw, and the present invention makes corresponding improvements to the technical problems mentioned in the background art.

[0026] As a further definition of the constant temperature mechanism 2 of the present invention, the hot and cold unit 22 includes a cold water tank 2201 and a hot water tank 2202. Both the cold water tank 2201 and the hot water tank 2202 are fixedly connected to one side of the extruder body 1. The inner cavities of both the cold water tank 2201 and the hot water tank 2202 are fixedly connected to inlet pipes 2203. The top ends of the two inlet pipes 2203 extend to the tops of the cold water tank 2201 and the hot water tank 2202 respectively and are fixedly connected to flexible hoses 2204. One end of each of the two flexible hoses 2204 is fixedly connected to a first locking cylinder 2205. A collector box 2206 is fixedly connected to the surface of the extruder body 1. A metal ring 2207 is provided at one end of the casing 2205, and an electromagnetic ring 2208 is provided on one side of the collector box 2206. The metal ring 2207 and the electromagnetic ring 2208 are magnetically connected. A through hole 2209 is provided on one side of the collector box 2206, and the through hole 2209 is located at the center of the electromagnetic ring 2208. An annular groove 2210 is provided on the inner wall of the screw 13, and two annular grooves 2211 are provided on the surface of the screw 13. A water inlet groove 2212 is provided on the inner wall of one of the annular grooves 2211, and the water inlet groove 2212 communicates with the annular groove 2210. A return groove 2213 and a connecting groove 2211 are provided on the inner wall of the screw 13. 214. The return groove 2213 and the annular groove 2210 are connected by a connecting groove 2214. Another annular groove 2211 has an outlet groove 2215 on its inner wall, which is connected to the return groove 2213. A rotating ring 2216 is rotatably connected to the surface of the screw 13. The surface of the rotating ring 2216 is fixedly connected to the inner wall of the extruder body 1. The sealing structure between the rotating ring 2216 and the screw 13 uses conventional sealing structures such as sealing strips, which will not be elaborated further. An inlet pipe 2217 and an outlet pipe 2218 are fixedly connected to the surface of the rotating ring 2216. The water outlet end of the inlet pipe 2217 is connected to the water inlet groove 2210. The position of 212 corresponds to the position of the water inlet end of the outlet pipe 2218 and the position of the outlet groove 2215. One end of the inlet pipe 2217 is fixedly connected to the bottom of the collector box 2206. By setting up the cooling and heating unit 22, timely cooling and heating liquids are provided for the cooling and heating of the screw 13. When the temperature probe 2102 detects that the temperature of the screw 13 is too high, cooling liquid is introduced to cool down the screw 13 in time. When the temperature probe 2102 detects that the temperature of the screw 13 is too low, high temperature liquid is introduced to adjust the temperature of the screw 13 in time, ensuring the timeliness of temperature adjustment and ensuring the stability of the extrusion effect.

[0027] A support plate 2219 is fixedly connected to one side of the cold water tank 2201, and a water pump 2220 is fixedly connected to the top of the support plate 2219. One end of the outlet pipe 2218 is fixedly connected to the input end of the water pump 2220, and a liquid guide pipe 2221 is fixedly connected to the output end of the water pump 2220. One end of the liquid guide pipe 2221 is fixedly connected to one side of the hot water tank 2202. By setting up the support plate 2219, the water pump 2220 and the liquid guide pipe 2221, the support plate 2219 supports the water pump 2220. The water pump 2220 provides sufficient power for the liquid delivery of the thermostatic mechanism 2. The liquid guide pipe 2221, together with the water pump 2220, guides the warm liquid discharged from the screw 13 into the hot water tank 2202, realizing the recycling of the heat source and reducing the energy output of the hot water tank 2202 when heating the liquid.

[0028] The first locking cylinder 2205 has four receiving slots 2222 at one end. Telescopic rods 2223 are fixedly connected to the inner wall of the receiving slots 2222. One end of the inner rod of each of the four telescopic rods 2223 is fixedly connected to one side of the metal ring 2207. The current collector 2206 has a placement slot 2224 on one side. One side of the electromagnetic ring 2208 is fixedly connected to the inner wall of the placement slot 2224. By setting the receiving slots 2222 and the telescopic rods 2223 in cooperation, the receiving slots 2222 provide sufficient space for the installation of the telescopic rods 2223. The telescopic rods 2223 can adjust the distance between the metal ring 2207 and the first locking cylinder 2205.

[0029] A first spring 2225 is slidably sleeved on the surface of the inner rod of the telescopic rod 2223. The two ends of the first spring 2225 are fixedly connected to one end of the outer rod of the telescopic rod 2223 and the surface of the metal ring 2207, respectively. A silicone sleeve 2226 is fixedly connected to one end of the first engaging sleeve 2205. The surface of the metal ring 2207 is fixedly connected to the inner wall of the silicone sleeve 2226. The telescopic rod 2223, the first spring 2225, and the metal ring 2207 are all located within the inner cavity of the silicone sleeve 2226. The arrangement of the first spring 2225, in conjunction with the telescopic rod 2223, enables elastic adjustment of the distance between the metal ring 2207 and the electromagnetic ring 2208. Furthermore, through the reaction force of the first spring 2225, when the metal ring 2207 and the electromagnetic ring 2208 are disconnected from the magnetic attraction state, the reaction force of the first spring 2225 can realize the reset of the metal ring 2207. The setting of the silicone sleeve 2226 can realize the sealing between the metal ring 2207 and the electromagnetic ring 2208, thereby ensuring the stability during liquid transportation. The electromagnetic ring 2208 is powered by the power control system of the extruder body 1. When energized, the electromagnetic ring 2208 generates magnetic force to magnetically attract the metal ring 2207. When de-energized, the magnetic force of the electromagnetic ring 2208 disappears, and the magnetic attraction to the metal ring 2207 is canceled.

[0030] A support frame 2227 is fixedly connected to the top of both the cold water tank 2201 and the hot water tank 2202. A second motor 2228 is fixedly connected to the top of the support frame 2227. A connecting rod 2229 is fixedly connected to the output end of the second motor 2228. One end of the connecting rod 2229 is rotatably connected to the inner wall of the collector box 2206 via a bearing. Three connecting blocks 2230 are fixedly connected to the surface of the connecting rod 2229. One end of two of the connecting blocks 2230 is fixedly connected to the surface of the two first locking cylinders 2205, respectively. By setting the support frame 2227, the second motor 2228 is supported. The rotatable connection between the connecting rod 2229 and the collector box 2206 ensures the stability of the connecting rod 2229 when rotating, thereby ensuring the stability and accuracy of the switching of the first locking cylinders 2205. The connecting blocks 2230 enable the connection of the first locking cylinders 2205.

[0031] A water filling pipe 2231 is fixedly connected to the surface of the cold water tank 2201, and a drain pipe 2232 is fixedly connected to the bottom of the hot water tank 2202. One end of both the water filling pipe 2231 and the drain pipe 2232 is connected to an external water storage structure. By setting the water filling pipe 2231, the liquid in the external water storage structure can be replenished into the cold water tank 2201 in a timely manner. The setting of the drain pipe 2232 can discharge the excess liquid in the hot water tank 2202 into the external water storage structure, ensuring the balanced replenishment and recycling of liquid resources of the constant temperature mechanism 2.

[0032] The specific implementation of this embodiment is as follows: When the temperature probe 2102 detects that the temperature of the screw 13 is too low, the second motor 2228 is started. The second motor 2228 drives the connecting rod 2229, the connecting block 2230, and the first engaging cylinder 2205 to rotate counterclockwise by 90 degrees. The second motor 2228 is programmed with a rotation command in advance. After the first engaging cylinder 2205 rotates counterclockwise by 90 degrees, it aligns with the through hole 2209. At this time, the electromagnetic ring 2208 in the placement slot 2224 is energized. The energized electromagnetic ring 2208 attracts the metal ring 2207, and the metal ring 2207 is attracted. During adsorption, the inner rod of the telescopic rod 2223 extends and the first spring 2225 is stretched until the metal ring 2207 and the electromagnetic ring 2208 are tightly attached, achieving docking between the first engaging cylinder 2205 and the collector box 2206. The silicone sleeve 2226 is long enough to ensure a tight fit between the electromagnetic ring 2208 and the metal ring 2207 during magnetic adsorption. The hot water tank 2202 is equipped with an electric heating element to preheat the liquid inside, keeping it at a high temperature. Then, the water pump 2220 is started. After the water pump 2220 starts, it... The outlet pipe 2218, outlet channel 2215, return channel 2213, connecting channel 2214, annular channel 2210, inlet channel 2212, inlet pipe 2217, manifold 2206, first retaining sleeve 2205, hose 2204, inlet pipe 2203, and hot water tank 2202 form a liquid flow path. High-temperature liquid enters the hose 2204 through the inlet pipe 2203, enters the first retaining sleeve 2205 through the hose 2204, and then enters the manifold 2206 through the through hole 2209. The high-temperature liquid entering the manifold 2206 enters the rotating ring 2 through the inlet pipe 2217. 216 Inner ring, injected into annular groove 2211, high-temperature liquid enters annular groove 2210 through inlet groove 2212 to heat screw 13, then liquid enters return groove 2213 through connecting groove 2214, and then is discharged to another annular groove 2211 through return groove 2213 and outlet groove 2215, and then discharged to the input end of water pump 2220 through outlet pipe 2218 corresponding to annular groove 2211. Then, the used liquid is reintroduced into hot water tank 2202 through output end of water pump 2220 and liquid guide pipe 2221 for circulation heating.When the temperature probe 2102 detects that the screw 13 temperature is too high, the second motor 2228 controls the other first engaging cylinder 2205 to rotate 90 degrees clockwise, ensuring precise alignment between the other first engaging cylinder 2205 and the through hole 2209. Then, the water pump 2220 is started to draw liquid from the cold water tank 2201 into the screw 13 to cool it down. The cooled liquid is then discharged into the hot water tank 2202. This avoids raising the temperature of the low-temperature liquid in the cold water tank 2201 and also reduces the temperature difference during heating in the hot water tank 2202, accelerating the heating process and reducing resource consumption. This allows for timely temperature regulation of the screw 13, preventing excessively high or low temperatures from reducing extrusion efficiency.

[0033] Example 3: Please refer to Figures 1-8 The present invention provides a technical solution: a constant temperature mechanism for an extruder screw, and the present invention makes corresponding improvements to the technical problems mentioned in the background art.

[0034] As a further definition of the constant temperature mechanism 2 of the present invention, the venting unit 23 includes a second engaging cylinder 2301. The surface of the second engaging cylinder 2301 is fixedly connected to one end of another connecting block 2230. One end of the second engaging cylinder 2301 has a circular hole 2302. A one-way valve 2303 is fixedly connected to the inner wall of the circular hole 2302. The other end of the second engaging cylinder 2301 is also magnetically connected to an electromagnetic ring 2208 through a telescopic rod 2223, a first spring 2225, a metal ring 2207, a silicone sleeve 2226, and an electromagnetic ring 2208. By setting the venting unit 23, after the screw 13 is heated and cooled, and the temperature is maintained within the standard range, the venting unit 23 can vent excess liquid in the screw 13, avoiding the delay of subsequent temperature adjustment speed caused by residual liquid, thereby improving the extrusion efficiency.

[0035] A filter screen 2304 is fixedly connected to one end of the second clamping cylinder 2301. The filter screen 2304 is used to cover the round hole 2302. By setting the filter screen 2304, impurities in the air can be intercepted, ensuring the stable operation of the water pump 2220 during the evacuation operation.

[0036] The specific implementation of this embodiment is as follows: When the screw 13 maintains a stable standard temperature, the second locking cylinder 2301 connects with the through hole 2209. At this time, by starting the water pump 2220, the remaining liquid in the screw 13 is discharged into the hot water tank 2202. The round hole 2302 provides space for the installation of the one-way valve 2303. The second locking cylinder 2301 and the electromagnetic ring 2208 are also magnetically sealed by the telescopic rod 2223, the first spring 2225, the metal ring 2207 and the silicone sleeve 2226 to ensure the sealing of the liquid flow path. The setting of the second locking cylinder 2301 and the one-way valve 2303 can provide a ventilation path for the adsorption path of the water pump 2220 when the remaining liquid is discharged, avoiding the failure of the venting operation due to excessive pressure in the screw 13, thereby ensuring the smooth discharge of the remaining liquid in the screw 13 and improving the temperature adjustment speed of the screw 13.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A constant temperature mechanism for an extruder screw, comprising an extruder body (1), the extruder body (1) comprising a first motor (11), the output end of the first motor (11) being fixedly connected to a coupling (12), and one end of the coupling (12) being fixedly connected to a screw (13), characterized in that: The extruder body (1) is equipped with a temperature control mechanism (2); The constant temperature mechanism (2) includes a temperature sensing unit (21), which is disposed inside the screw (13) and is used to monitor the temperature of the screw (13). The constant temperature mechanism (2) also includes a heating and cooling unit (22), which is disposed on the extruder body (1). The heating and cooling unit (22) is used in conjunction with the temperature sensing unit (21). The heating and cooling unit (22) is used to cool and heat the screw (13) after the temperature sensing unit (21) senses the temperature of the screw (13). The constant temperature mechanism (2) also includes a drain unit (23), which is located inside the hot and cold unit (22). The drain unit (23) works in conjunction with the hot and cold unit (22) to drain the remaining water in the screw (13) before the hot and cold unit (22) switches between hot and cold water.

2. The temperature control mechanism for an extruder screw according to claim 1, characterized in that: The temperature sensing unit (21) includes an embedded groove (2101) formed on the inner wall of the screw (13). A temperature probe (2102) is fixedly connected to the inner wall of the embedded groove (2101). A first magnetic core ring (2103) is fixedly connected to the surface of the extruder body (1). A second magnetic core ring (2104) is fixedly connected to the surface of the screw (13). The temperature probe (2102) is electrically connected to the second magnetic core ring (2104) through a wire. The second magnetic core ring (2104) is non-contactly sleeved inside the first magnetic core ring (2103). The first magnetic core ring (2103) and the second magnetic core ring (2104) are magnetically connected.

3. The temperature control mechanism for an extruder screw according to claim 1, characterized in that: The heating and cooling unit (22) includes a cold water tank (2201) and a hot water tank (2202). Both the cold water tank (2201) and the hot water tank (2202) are fixedly connected to one side of the extruder body (1). The inner cavities of both the cold water tank (2201) and the hot water tank (2202) are fixedly connected to water inlet pipes (2203). The top ends of the two water inlet pipes (2203) extend to the top of the cold water tank (2201) and the hot water tank (2202) respectively and are fixedly connected to flexible hoses (2204). One end of each of the two flexible hoses (2204) is fixedly connected to a first A first clamping cylinder (2205) is provided, and a collector box (2206) is fixedly connected to the surface of the extruder body (1). A metal ring (2207) is provided at one end of the first clamping cylinder (2205), and an electromagnetic ring (2208) is provided on one side of the collector box (2206). The metal ring (2207) and the electromagnetic ring (2208) are magnetically connected. A through hole (2209) is provided on one side of the collector box (2206), and the through hole (2209) is located at the center of the electromagnetic ring (2208). An annular groove (2210) is provided on the inner wall of the screw (13). The screw (13) has two annular grooves (2211) on its surface. One of the annular grooves (2211) has an inlet groove (2212) on its inner wall, which is connected to the annular groove (2210). The screw (13) also has a return groove (2213) and a connecting groove (2214) on its inner wall, which are connected to the annular groove (2210) via the connecting groove (2214). The other annular groove (2211) has an outlet groove (2215) on its inner wall, which is connected to the return groove (2211). 2213) is connected, and a rotating ring (2216) is rotatably connected to the surface of the screw (13). The surface of the rotating ring (2216) is fixedly connected to the inner wall of the extruder body (1). The surface of the rotating ring (2216) is fixedly connected to the inlet pipe (2217) and the outlet pipe (2218). The water outlet end of the inlet pipe (2217) corresponds to the position of the water inlet tank (2212). The water inlet end of the outlet pipe (2218) corresponds to the position of the outlet tank (2215). One end of the inlet pipe (2217) is fixedly connected to the bottom of the collector box (2206).

4. The temperature control mechanism for an extruder screw according to claim 3, characterized in that: A support plate (2219) is fixedly connected to one side of the cold water tank (2201), and a water pump (2220) is fixedly connected to the top of the support plate (2219). One end of the outlet pipe (2218) is fixedly connected to the input end of the water pump (2220), and a liquid guide pipe (2221) is fixedly connected to the output end of the water pump (2220). One end of the liquid guide pipe (2221) is fixedly connected to one side of the hot water tank (2202).

5. The temperature control mechanism for an extruder screw according to claim 3, characterized in that: The first locking cylinder (2205) has four receiving slots (2222) at one end. The inner wall of the receiving slot (2222) is fixedly connected to a telescopic rod (2223). One end of the inner rod of each of the four telescopic rods (2223) is fixedly connected to one side of the metal ring (2207). The current collection box (2206) has a placement slot (2224) on one side. One side of the electromagnetic ring (2208) is fixedly connected to the inner wall of the placement slot (2224).

6. The temperature control mechanism for an extruder screw according to claim 3, characterized in that: The inner rod of the telescopic rod (2223) is slidably sleeved with a first spring (2225). The two ends of the first spring (2225) are fixedly connected to one end of the outer rod of the telescopic rod (2223) and the surface of the metal ring (2207), respectively. One end of the first locking cylinder (2205) is fixedly connected with a silicone sleeve (2226). The surface of the metal ring (2207) is fixedly connected to the inner wall of the silicone sleeve (2226). The telescopic rod (2223), the first spring (2225) and the metal ring (2207) are all located in the inner cavity of the silicone sleeve (2226).

7. The temperature control mechanism for an extruder screw according to claim 3, characterized in that: The tops of the cold water tank (2201) and the hot water tank (2202) are fixedly connected to a support frame (2227). The top of the support frame (2227) is fixedly connected to a second motor (2228). The output end of the second motor (2228) is fixedly connected to a connecting rod (2229). One end of the connecting rod (2229) is rotatably connected to the inner wall of the collector box (2206) through a bearing. Three connecting blocks (2230) are fixedly connected to the surface of the connecting rod (2229). One end of two of the connecting blocks (2230) is fixedly connected to the surface of the two first locking cylinders (2205) respectively.

8. The temperature control mechanism for an extruder screw according to claim 3, characterized in that: The surface of the cold water tank (2201) is fixedly connected to a water filling pipe (2231), and the bottom of the hot water tank (2202) is fixedly connected to a drain pipe (2232). One end of the water filling pipe (2231) and the drain pipe (2232) are both connected to an external water storage structure.

9. The temperature control mechanism for an extruder screw according to claim 3, characterized in that: The venting unit (23) includes a second locking cylinder (2301). The surface of the second locking cylinder (2301) is fixedly connected to one end of another connecting block (2230). One end of the second locking cylinder (2301) is provided with a round hole (2302). A one-way valve (2303) is fixedly connected to the inner wall of the round hole (2302). The other end of the second locking cylinder (2301) is also magnetically connected to the electromagnetic ring (2208) through the telescopic rod (2223), the first spring (2225), the metal ring (2207), and the silicone sleeve (2226).

10. The temperature control mechanism for an extruder screw according to claim 9, characterized in that: A filter screen (2304) is fixedly connected to one end of the second locking cylinder (2301), and the filter screen (2304) is used to cover the round hole (2302).

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