Circulating cooling type circular knitting needle heat treatment equipment

Abstract

The invention discloses circulating cooling type circular knitting needle heat treatment equipment, which relates to the technical field of heat treatment, and comprises a base, a treatment bin, two parallel limiting rails, and a first heating coil and a second heating coil which are mounted on the surface of the base through a mounting plate and are positioned on two sides of the limiting rails, in the heat treatment process of the circular machine needle, the first guide rail with the multiple fluctuating sections is utilized, when the supporting frame moves, the first guide rail guides and adjusts the position change of the positioning block, and the needle tip and the needle tail are heated and cooled in the moving process; the circular machine needle can be subjected to heat treatment and cooling at different positions in the moving process, the needle tip and the needle tail are subjected to heat treatment respectively, the needle tip can form a martensitic structure to enhance the hardness, the needle tail can be endowed with plasticity while the strength is guaranteed, the needle tail can meet the production requirement, errors caused by multiple times of clamping are avoided, and the production efficiency is improved. Working procedure connection time consumption is reduced, and production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of heat treatment, in particular to a circulating cooling type circular knitting machine needle heat treatment device. Background Art

[0002] As the core process for optimizing the performance of metal materials, heat treatment can significantly improve the internal microstructure and surface properties of the workpiece without changing its appearance and overall chemical composition by precisely controlling the heating, insulation and cooling processes. In the field of circular knitting needle manufacturing, the application of this process has a decisive influence on the service life and processing accuracy of the product.

[0003] Existing circular knitting machine needle heat treatment processes generally use a holistic treatment mode. While this can improve structural strength, it struggles to meet the differentiated performance requirements of the needle tip and tail. From an analysis of actual working scenarios, the needle tip, as the core component for puncturing the yarn, must withstand local contact stresses of up to 500-800 MPa during high-speed operation. It also faces abrasive wear from fiber impurities in the yarn (wear rate reaching 0.003 mm / 1,000 punctures). This requires its hardness to be maintained in the HRC 60-65 range. Meanwhile, the needle tail, during operation, is subject to ±15° cyclic bending, with stress amplitudes reaching 400-600 MPa (close to 60% of the material's yield strength). This makes it highly susceptible to fracture due to fatigue crack propagation, so the hardness must be controlled at HRC 45-50 to ensure sufficient toughness. Traditional holistic heat treatment results in performance contradictions, often causing the needle tip to undergo plastic deformation (indentation depth > 0.01 mm) due to low hardness, or fatigue failure (fracture cycles < 500,000) due to embrittlement of the needle tail. In addition, when the existing technology performs segmented heat treatment on circular knitting needles, the commonly used fixed clamping device cannot flexibly change the clamping position of the circular knitting needle during the processing process, resulting in difficulty in completing the sequential heat treatment of the needle tip and needle tail in one workflow. Moreover, the fixed clamping position is prone to cause stress concentration during the heat treatment process. Summary of the Invention

[0004] The purpose of the present invention is to provide a circulating cooling type circular knitting machine needle heat treatment equipment to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: a circulating cooling type circular knitting machine needle heat treatment device, comprising a base, a treatment chamber, two parallel limiting rails, a first heating coil and a second heating coil mounted on the surface of the base via a mounting plate and located on both sides of the limiting rails, and spray plates mounted on the surface of the mounting plate at positions corresponding to the first heating coil and the second heating coil, the spray plates being used to spray water and cooling oil on the needle tips and needle tails of the circular knitting machine needles, respectively, for cooling; The inner sides of the two limiting rails are slidably connected to a hollow support frame by a driving motor, and a receiving plate is fixedly connected to the surface of the support frame, and a plurality of V-shaped positioning grooves with horizontal bottoms are provided on the surface of the receiving plate. A fixed block extending to the position of the positioning groove is fixedly connected to the surface of the receiving plate, and the surface of the fixed block is connected to the positioning block through the first telescopic plate, and the surface of the positioning block is provided with a positioning mechanism for positioning the bent part in the middle position of the circular machine needle, and the surface of the positioning block is connected to the receiving block through the second telescopic plate, and a retractable stabilizing rod is connected between the receiving block and the receiving plate. The surfaces of the block and the fixed block are both provided with limiting mechanisms for limiting the circular knitting machine needle, and openings are provided on the surfaces of the limiting rail corresponding to the positions of the first heating coil and the second heating coil. The surface of the base is fixedly connected to a first guide rail located under the support frame, and a plurality of different undulating sections are provided in the middle position of the first guide rail. The positioning block slides in the first guide rail, and the first guide rail is used to guide the positioning block to move up and down during the movement of the positioning block, and drive the circular knitting machine needle to move through the positioning block and the positioning mechanism to move the needle tip and needle tail of the circular knitting machine needle to the positions of the first heating coil and the second heating coil respectively.

[0006] As a further solution of the present invention, the positioning mechanism includes two retractable positioning rods fixedly mounted on the ends of the surface of the positioning block and arranged opposite to each other and staggered. The positioning rods are used to position and limit the bending position in the middle of the circular machine needle. The two positioning rods are provided with inclined surfaces on the side and end where they are close to each other.

[0007] As a further solution of the present invention, the limiting mechanism includes a pressure plate respectively installed on the surface of the fixed block and the receiving block through a retractable driving member. The end of the pressure plate is a slope and the pressure plate passes through the receiving plate and extends to the inside of the positioning groove. The pressure plate is used to limit the position of the circular machine needle end on both sides of the positioning rod.

[0008] As a further solution of the present invention, a limiting block and a guide block are respectively provided in the positioning groove corresponding to the needle tip and needle tail positions of the circular machine needle. The upper end of the guide block is a slope for guiding the position of the circular machine needle. The surface of the limiting block is provided with a limiting groove of the same shape as the curved hook of the circular machine needle tip. The edge of the limiting groove is a slope. The surface of the limiting rail is provided with guide grooves corresponding to the positions of the limiting block and the guide block. The guide groove is used to guide the limiting block or the guide block to move downward when the circular machine needle moves to the opening position.

[0009] As a further solution of the present invention, a second guide rail is fixedly connected to the surface of the base, and the second guide rail is above the first guide rail. The bottom of the limiting block slides in the second guide rail. The second guide rail is used to guide the limiting block and push the tail of the circular machine needle to move within the range of the second heating coil. The limiting block slides in the guide groove through the telescopic rod.

[0010] As a further solution of the present invention, a groove is provided on the surface of the positioning block corresponding to the position of the positioning rod, and the groove is an inclined surface corresponding to the end of the positioning rod. The bottom of the positioning rod is fixedly connected to a fixing frame that passes through the positioning block. The fixing frame is located below the positioning block and has an inclined surface on one side. The fixing frame is used to drive the positioning rod to move into the groove by squeezing the fixing frame when the supporting frame approaches the supporting frame.

[0011] As a further solution of the present invention, the position where the second guide rail crosses the first guide rail is elastically hinged with a swing rod through a rotating column, and the swing rod is used to give way when the positioning block moves along the first guide rail. The bottom of the second guide rail is slidably connected to the limiting rod, and a limiting groove is provided on the surface of the rotating column away from the side of the support frame. The limiting rod is in contact with the surface of the rotating column close to the side of the support frame, and the positioning block and the limiting block slide in an offset position inside the first guide rail and the second guide rail.

[0012] As a further solution of the present invention, the surface of the receiving block is slidably connected up and down with a sliding block that passes through the receiving block, the surface of the sliding block is provided with a Y-shaped guide slope, the surface of the sliding block is provided with an inclined groove, the surface of the pressure plate is fixedly connected with an extension rod, and the extension rod slides in the inclined groove.

[0013] As a further solution of the present invention, the side of the sliding block is fixedly connected to an extrusion block with a slope on one side, and the bottom of the positioning block is fixedly connected to an extrusion rod with an L-shaped end that is a slope at the corresponding position of the extrusion block. The extrusion rod is used to extrude the extrusion block downward when the extrusion block approaches the extrusion rod, and the tail end of the inclined groove is bent upward.

[0014] As a further solution of the present invention, a partition plate is fixedly connected between the first heating coil and the spray plate and between the second heating coil and the spray plate on the surface of the limiting rail, and a blocking plate is hingedly connected to the partition plate corresponding to the opening position. A plurality of support rods that are not affected by the second heating coil are fixedly connected between the partition plate and the mounting plate close to the second heating coil, and both sides of the upper end of the support rods are inclined surfaces.

[0015] Compared with the prior art, the present invention has the following beneficial effects: During the heat treatment of the circular knitting needle, the present invention utilizes a first guide rail with multiple undulating sections. When the support frame moves, the first guide rail guides the position change of the adjustment positioning block, and the needle tip and the needle tail are heated and cooled respectively during the movement, so that the circular knitting needle can be heat treated and cooled at different positions during the movement. The needle tip and the needle tail are heat treated respectively, so that the needle tip can form a martensitic structure to enhance the hardness, and the needle tail can be given plasticity while ensuring strength, so that the needle tail can meet the production requirements, avoid errors caused by multiple clamping, reduce the time spent in connecting processes, and improve production efficiency.

[0016] During the process of processing the circular knitting needle of the present invention, after the circular knitting needle is placed in the positioning groove, when the circular knitting needle moves between the two positioning rods on the surface of the positioning block, the inclined surfaces on the side and end of the positioning rod can guide the movement of the circular knitting needle, so that the circular knitting needle moves between the two positioning rods. The positioning rod can position the circular knitting needle from the bending point in the middle position, so that the circular knitting needle can be in a fixed position in the positioning groove, which is convenient for subsequent heating and cooling, and ensures the control of accuracy. When the positioning block moves, the positioning rod can push the circular knitting needle to move synchronously.

[0017] During the process of processing the circular machine needle of the present invention, after the circular machine needle is placed in the positioning groove, the driving part drives the pressure plate to move into the positioning groove. The end of the pressure plate can move the circular machine needle to the bottom of the pressure plate. The pressure plate can make the circular machine needle in a horizontal state, avoiding the circular machine needle from not being in a horizontal state in the positioning groove, affecting subsequent movement, and unable to move between the positioning rods. When the positioning block drives the circular machine needle to move, the circular machine needle can move under the pressure plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention after the overall hidden processing chamber; Figure 3 for Figure 2 Schematic diagram of the structure at A in the middle; Figure 4 This is a structural diagram of the positional relationship among the base, the first guide rail, and the second guide rail in the present invention; Figure 5 A schematic structural diagram of the undulating positions of the first guide rail and the second guide rail in the present invention; Figure 6 This is a schematic diagram of the structure after the second heating coil is hidden between the two mounting plates in the present invention; Figure 7 for Figure 6 Schematic diagram of the structure at B in the middle; Figure 8 Schematic diagram of the structure of the positional relationship among the base, the limiting rail, the first guide rail and the second guide rail in the present invention; Figure 9 for Figure 8 Schematic diagram of the structure at C in the middle; Figure 10 It is a structural diagram of the support frame and the receiving plate surface mechanism in the present invention; Figure 11 for Figure 10 Schematic diagram of the structure at D in the middle; Figure 12 This is a structural diagram of the positional relationship between the support frame and a single circular knitting machine needle in the present invention; Figure 13 for Figure 12 Schematic diagram of the structure at E in the middle; Figure 14 This is a schematic structural diagram of the bottom of the support frame in the present invention; Figure 15 This is a structural diagram of the connection relationship between the fixed block, the first telescopic plate, the positioning block, the second telescopic plate and the receiving block in the present invention; Figure 16 This is a structural diagram of the positional relationship between the positioning block and the groove in the present invention; Figure 17 This is a schematic structural diagram of the intersection of the first guide rail and the second guide rail in the present invention; Figure 18 for Figure 17 Schematic diagram of the structure at F in the middle; Figure 19 Schematic diagram of the structure of the circular knitting needle when the needle tip is pushed out in the present invention; Figure 20 Schematic diagram of the structure of the circular knitting needle when the needle tail portion is pushed out; Figure 21 for Figure 20 Schematic diagram of the structure at G in the middle; Figure 22 Schematic diagram of the structure of the circular knitting machine needle when the needle tail end is completely pushed out; Figure 23 for Figure 22 Schematic diagram of the structure at H in the middle.

[0019] In the accompanying drawings: 1-base, 2-processing chamber, 3-limiting rail, 4-mounting plate, 5-first heating coil, 6-second heating coil, 7-spray plate, 8-driving motor, 9-support frame, 10-receiving plate, 11-positioning groove, 12-fixing block, 13-first telescopic plate, 14-positioning block, 15-second telescopic plate, 16-receiving block, 17-stabilizing rod, 18-opening, 19-first guide rail, 20-positioning rod, 21-driving member, 22-pressing plate, 23-limiting block, 24-guide block, 25-limiting groove, 26-guide groove, 27-second guide rail, 28-telescopic rod, 29-groove, 30-fixed frame, 31-rotating column, 32-swing rod, 33-limiting rod, 34-limiting groove, 35-sliding block, 36-guide slope, 37-oblique groove, 38-extension rod, 39-extrusion block, 40-extrusion rod, 41-partition plate, 42-blocking plate, 43-support rod. DETAILED DESCRIPTION

[0020] See also Figure 1-Figure 23The present invention provides a technical solution: a circulating cooling type circular knitting machine needle heat treatment device, comprising a base 1, a treatment chamber 2, two parallel limiting rails 3, a first heating coil 5 and a second heating coil 6 mounted on the surface of the base 1 through a mounting plate 4 and located on both sides of the limiting rails 3, and spray plates 7 mounted on the surface of the mounting plate 4 at positions corresponding to the first heating coil 5 and the second heating coil 6. The spray plates 7 are used to spray water and cooling oil on the needle tips and needle tails of the circular knitting machine needles for cooling; The inner sides of the two limiting rails 3 are slidably connected with a hollow support frame 9 through a driving motor 8, and a receiving plate 10 is fixedly connected to the surface of the support frame 9, and a plurality of V-shaped positioning grooves 11 with a horizontal bottom are provided on the surface of the receiving plate 10, and a fixed block 12 extending to the position of the positioning groove 11 is fixedly connected to the surface of the receiving plate 10, and a positioning block 14 is connected to the surface of the fixed block 12 through a first telescopic plate 13, and a positioning mechanism is provided on the surface of the positioning block 14 for positioning the bent portion in the middle position of the circular machine needle, and a receiving block 16 is connected to the surface of the positioning block 14 through a second telescopic plate 15, and a retractable stabilizing rod 17 is connected between the receiving block 16 and the receiving plate 10. 16 and the fixed block 12 are provided with a limiting mechanism for limiting the circular knitting needle, and openings 18 are provided on the surface of the limiting rail 3 corresponding to the positions of the first heating coil 5 and the second heating coil 6. The surface of the base 1 is fixedly connected to a first guide rail 19 located below the support frame 9. The middle position of the first guide rail 19 is provided with multiple different undulating sections. The positioning block 14 slides in the first guide rail 19. The first guide rail 19 is used to guide the positioning block 14 to move up and down during the movement of the positioning block 14, and drives the circular knitting needle to move through the positioning block 14 and the positioning mechanism to move the needle tip and the needle tail of the circular knitting needle to the positions of the first heating coil 5 and the second heating coil 6 respectively; During the heat treatment of the circular knitting needle, the circular knitting needle needs to be placed in the positioning groove 11 first. The limiting mechanism can limit the two ends of the circular knitting needle to keep it horizontal. The positioning mechanism positions the circular knitting needle by bending the middle position of the circular knitting needle. Then the driving motor 8 drives the support frame 9 to move along the limiting rail 3. The positioning block 14 moves to the L1 section under the action of the first guide rail 19 (see the appendix of the instruction manual). Figure 5When the circular knitting machine needle moves upwards, the positioning block 14 drives the circular knitting machine needle to move upwards, the first telescopic plate 13 is extended, and the second telescopic plate 15 is compressed. The needle tip of the circular knitting machine needle can move to the position of the first heating coil 5 through the opening 18. The first heating coil 5 is a high-frequency coil, which can achieve a needle tip of 0.5mm. Local heating within the range can avoid affecting the needle tail. The needle tip part inside the first heating coil 5 is quickly heated to 820°C. The coil heating can accurately control the temperature rise range of the needle tip and heat it quickly. Then the positioning block 14 moves to the L2 section, and the needle tip moves out of the range of the first heating coil 5 and moves to the range of the spray plate 7, and the needle tip continues to move upward for a distance, so that the heated part of the needle tip can be completely moved into the range of the spray plate 7. The spray plate 7 sprays water to quickly cool the needle tip, so that the needle tip forms a martensite structure to enhance the hardness. When the positioning block 14 moves to the L3 section, the circular machine needle returns to its original position, the second telescopic plate 15 is extended again, and the first telescopic plate 13 is compressed. When the positioning block 14 moves to the front half of the L4 section, the tail end of the circular machine needle can be opened. The mouth 18 moves to the second heating coil 6 for heating. The second heating coil 6 is a medium frequency coil, which is suitable for deep heating of the needle tail and meets the hardenability requirements. The needle tail can be quickly heated to 780°C. When the positioning block 14 moves to the second half of the L4 section, the needle tail moves out of the range of the second heating coil 6 and moves to the range of the spray plate 7. The spray plate 7 sprays cooling oil to cool the needle tail, ensuring the strength of the needle tail while giving it plasticity so that the needle tail can meet production requirements. Finally, the positioning block 14 moves to the L5 section, and the circular machine needle returns to its original position. The first guide rail 19 is used to guide and adjust the position of the positioning block 14, so that the circular machine needle can perform heat treatment and cooling on different positions during the movement, avoiding errors caused by multiple clamping, reducing the time spent in process connection, and improving production efficiency.

[0021] As a further solution of the present invention, the positioning mechanism includes two retractable positioning rods 20 fixedly mounted on the ends of the surface of the positioning block 14 and arranged in an offset manner. The positioning rods 20 are used to position and limit the bending position of the middle of the circular knitting needle. The two positioning rods 20 are provided with inclined surfaces on the sides and ends thereof that are close to each other. During the processing of the circular knitting needle, after the circular knitting needle is placed in the positioning groove 11, when the circular knitting needle moves between the two positioning rods 20 on the surface of the positioning block 14, the inclined surfaces on the side and end of the positioning rod 20 can guide the movement of the circular knitting needle, making it convenient for the circular knitting needle to move between the two positioning rods 20. The positioning rod 20 can position the circular knitting needle from the bend in the middle position, so that the circular knitting needle can be in a fixed position in the positioning groove 11, which is convenient for subsequent heating and cooling, and ensures the control of accuracy. When the positioning block 14 moves, the positioning rod 20 can push the circular knitting needle to move synchronously.

[0022] As a further solution of the present invention, the limiting mechanism includes a pressure plate 22 respectively mounted on the surface of the fixed block 12 and the receiving block 16 through a retractable driving member 21. The end of the pressure plate 22 is an inclined surface and the pressure plate 22 passes through the receiving plate 10 and extends into the interior of the positioning groove 11. The pressure plate 22 is used to limit the position of the ends of the circular knitting needles on both sides of the positioning rod 20; During the processing of the circular machine needle, after the circular machine needle is placed in the positioning groove 11, the driving member 21 drives the pressure plate 22 to move into the positioning groove 11. The end of the pressure plate 22 can move the circular machine needle to the bottom of the pressure plate 22. The pressure plate 22 can make the circular machine needle in a horizontal state, avoiding the circular machine needle from not being in a horizontal state in the positioning groove 11, affecting subsequent movement, and unable to move between the positioning rods 20. When the positioning block 14 drives the circular machine needle to move, the circular machine needle can move under the pressure plate 22.

[0023] During the processing of the circular knitting needle, the front and rear positions of the circular knitting needle in the positioning groove 11 cannot be determined. As a further solution of the present invention, a limiting block 23 and a guide block 24 are respectively provided in the positioning groove 11 corresponding to the needle tip and needle tail positions of the circular knitting needle. The upper end of the guide block 24 is a bevel for guiding the position of the circular knitting needle. A limiting groove 25 of the same shape as the curved hook of the circular knitting needle tip is provided on the surface of the limiting block 23. The edge of the limiting groove 25 is a bevel. Guide grooves 26 are provided on the surface of the limiting rail 3 corresponding to the positions of the limiting block 23 and the guide block 24. The guide groove 26 is used to guide the limiting block 23 or the guide block 24 to move downward when the circular knitting needle moves to the opening 18 position; During the processing of the circular machine needle, when the circular machine needle is placed in the positioning groove 11, the limiting block 23 and the guide block 24 are in the positioning groove 11 to guide and position the positions of the needle tip and the needle tail of the circular machine needle, and the needle tip can be moved to the limiting groove 25 for limiting, ensuring that the circular machine needle can move to the predetermined position. Subsequently, during the processing of the circular machine needle, the support frame 9 moves, and the limiting block 23 and the guide block 24 move along the guide groove 26. When the circular machine needle moves to the two openings 18, the guide groove 26 acts on the limiting block 23 or the guide block 24 to move downward, thereby preventing the limiting block 23 or the guide block 24 from blocking the movement of the circular machine needle.

[0024] During the processing of the circular knitting needle, the portion of the needle tail end of the circular knitting needle that moves into the range of the second heating coil 6 is relatively small. As a further solution of the present invention, a second guide rail 27 is fixedly connected to the surface of the base 1. The second guide rail 27 is above the first guide rail 19. The bottom of the limiting block 23 slides in the second guide rail 27. The second guide rail 27 is used to guide the limiting block 23 and push the needle tail of the circular knitting needle to move into the range of the second heating coil 6. The limiting block 23 slides in the guide groove 26 through the telescopic rod 28. During the processing of the circular machine needle, when the circular machine needle tip is processed, the limiting block 23 is within the straight groove range of the second guide rail 27, and the limiting block moves downward under the action of the guide groove 26 to make way for the circular machine needle tip. Then, when the circular machine needle tip is restored to its original position after the processing is completed, the limiting block 23 moves upward, and the hook part of the circular machine needle tip moves into the limiting groove 25. Then the support frame 9 continues to move along the limiting rail 3. When the limiting block 23 moves to the L6 section of the second guide rail 27, the limiting block 23 gradually moves closer to the second guide rail 27. The second heating coil 6 moves and pushes the tail end of the circular knitting needle to move within the range of the second heating coil 6. The first telescopic plate 13 and the second telescopic plate 15 contract, the telescopic rod 28 extends, and the receiving block 16 and the positioning block 14 move under the push of the limiting block 23. The stabilizing rod 17 can enable the receiving block 16 to move stably, so that the tail end of the circular knitting needle can be pushed into the position of the second heating coil 6 for heating treatment. Then, when the limiting block 23 moves to the L7 section of the second guide rail 27, the limiting block 23 can drive the circular knitting needle to gradually return to its original position.

[0025] In the process of processing the circular knitting needle, the circular knitting needle is restricted by the positioning rod 20 and cannot be pushed by the limiting block 23. As a further solution of the present invention, a groove 29 is provided on the surface of the positioning block 14 corresponding to the position of the positioning rod 20. The groove 29 is an inclined surface corresponding to the end of the positioning rod 20. The bottom of the positioning rod 20 is fixedly connected to a fixing bracket 30 that passes through the positioning block 14. The fixing bracket 30 is located below the positioning block 14 and has an inclined surface on one side. The fixing bracket 30 is used to drive the positioning rod 20 to move into the groove 29 by squeezing the fixing bracket 30 when the fixing bracket 30 approaches the support frame 9; In the process of processing the circular machine needle, when the limiting block 23 pushes the circular machine needle and the positioning block 14, the positioning block 14 moves and drives the fixing frame 30 to move together, and then when the fixing frame 30 moves to the position of the support frame 9, the side of the support frame 9 squeezes the fixing frame 30 and the positioning rod 20 to move downward, and the positioning rod 20 moves into the groove 29. The positioning rod 20 releases the positioning restriction of the circular machine needle, and the limiting block 23 can push the tail end of the circular machine needle to move completely into the second heating coil 6 for heating, thereby realizing a one-time process to process the circular machine needle as a whole, without the need to remove and replace the clamping parts, thereby improving work efficiency, and the groove The inclined surface at the end of 29 can squeeze the end of the positioning rod 20 to contract when the positioning rod 20 moves into the groove 29, which is beneficial when the circular machine needle is in the positioning groove 11 but not between the positioning rods 20. When the pressure plate 22 pushes the circular machine needle to move below the pressure plate 22, the circular machine needle can press down the positioning rod 20. The contraction of the end of the positioning rod 20 when it moves into the groove 29 can increase the distance between the ends of the positioning rods 20 on both sides, thereby increasing the positioning range of the circular machine needle. When the end of the positioning rod 20 moves to the outside of the circular machine needle, the positioning rod 20 moves upward and pushes the circular machine needle to the middle, so that the circular machine needle can be in the middle position of the positioning block 14.

[0026] In the process of processing the circular knitting needle, when the tail end part of the circular knitting needle is pushed into the inside of the second heating coil 6, the second guide rail 27 needs to cross the first guide rail 19, and the second guide rail 27 and the first guide rail 19 affect each other. As a further solution of the present invention, the position where the second guide rail 27 crosses the first guide rail 19 is elastically hinged with a swing rod 32 through a rotating column 31. The swing rod 32 is used to give way when the positioning block 14 moves along the first guide rail 19. The bottom of the second guide rail 27 is slidably connected to the limiting rod 33, and a limiting groove 34 is provided on the surface of the rotating column 31 on the side away from the support frame 9. The limiting rod 33 is in contact with the surface of the rotating column 31 on the side close to the support frame 9, and the positioning block 14 and the limiting block 23 slide in the first guide rail 19 and the second guide rail 27. The position is staggered. When the cam 32 is in the unlocking position, the cam 32 is in the unlocking position, and ...

[0027] In the process of processing the circular knitting needle, when the circular knitting needle is in the positioning groove 11, when the pressing plate 22 acts on the circular knitting needle to move to the bottom of the pressing plate 22, it is difficult to adjust the circular knitting needle to the middle position of the positioning groove 11. As a further solution of the present invention, the surface of the receiving block 16 is slidably connected to a sliding block 35 that penetrates the receiving block 16. The surface of the sliding block 35 is provided with a Y-shaped guiding inclined surface 36, and the surface of the sliding block 35 is provided with an inclined groove 37. The surface of the pressing plate 22 is fixedly connected to an extension rod 38, and the extension rod 38 slides in the inclined groove 37; During the processing of the circular knitting needle, when the circular knitting needle is in the positioning groove 11 and the driving part 21 acts on the pressure plate 22 to move into the positioning groove 11, the movement of the pressure plate 22 drives the extension rod 38 to move together, and the extension rod 38 acts on the sliding block 35 to move upward through the inclined groove 37. The guiding bevel 36 in the middle of the sliding block 35 can guide the circular knitting needle to move to the middle position of the positioning groove 11, so that the circular knitting needle can be accurately moved to the middle position of the positioning groove 11, thereby ensuring that it is in the preset position during subsequent heat treatment, thereby improving the processing efficiency.

[0028] In the process of processing the circular knitting needle, after the circular knitting needle is moved between the positioning rods 20, the sliding block 35 affects the pushing of the limiting block 23 on the circular knitting needle. As a further solution of the present invention, a squeezing block 39 with a bevel on one side is fixedly connected to the side of the sliding block 35, and an L-shaped squeezing rod 40 with a bevel at the bottom corresponding to the squeezing block 39 is fixedly connected. The squeezing rod 40 is used to squeeze the squeezing block 39 downward when the squeezing block 39 approaches the squeezing rod 40, and the tail end of the inclined groove 37 is bent upward; During the processing of the circular knitting needle, when the limiting block 23 pushes the receiving block 16 and the positioning block 14 to move, the positioning rod 20 moves into the groove 29 to release the positioning restriction of the circular knitting needle, and the limiting block 23 and the positioning block 14 approach each other, and the second telescopic plate 15 shrinks. Then, after the extrusion rod 40 moves to the position of the extrusion block 39, the extrusion rod 40 pushes and squeezes the extrusion block 39 and the sliding block 35 to move downward to prevent the position of the sliding block 35 from being unable to change and affecting the movement of the circular knitting needle. When the sliding block 35 moves downward, the extension rod 38 moves upward along the bent part at the tail end of the inclined groove 37.

[0029] In the process of processing the circular knitting needle, when the circular knitting needle is cooled by the spray plate 7 after being heated, it is easy to splash to the position of the first heating coil 5 or the second heating coil 6. As a further solution of the present invention, a partition plate 41 is fixedly connected between the surface of the limiting rail 3 corresponding to the first heating coil 5 and the spray plate 7 and the second heating coil 6 and the spray plate 7. The partition plate 41 is hinged with a blocking plate 42 at the position corresponding to the opening 18. A plurality of support rods 43 that are not affected by the second heating coil 6 are fixedly connected between the partition plate 41 and the mounting plate 4 on the side close to the second heating coil 6. Both sides of the upper end of the support rod 43 are inclined surfaces; During the processing of the circular knitting needle, when the circular knitting needle moves to the bottom of the spray plate 7 after being heated, the circular knitting needle pushes the blocking plate 42 to rotate and passes through the partition plate 41. The partition plate 41 can block the liquid in the spraying process to prevent the splashing solution from falling onto the surface of the first heating coil 5 or the second heating coil 6, thereby affecting the heating effect. The support rod 43 can support the part of the needle tail that is inside the second heating coil 6 to prevent the circular knitting needle tail from deforming during the heating process. The support rod 43 is made of a material that is not affected by the second heating coil 6, and the inclined surface at the upper end of the support rod 43 can reduce the contact area between the support rod 43 and the circular knitting needle, thereby ensuring that the circular knitting needle is evenly heated.

Claims

1. A circulating cooling type circular knitting machine needle heat treatment device, comprising a base (1), a treatment chamber (2), two parallel limiting rails (3), a first heating coil (5) and a second heating coil (6) mounted on the surface of the base (1) via a mounting plate (4) and located on both sides of the limiting rails (3), and spray plates (7) mounted on the surface of the mounting plate (4) at positions corresponding to the first heating coil (5) and the second heating coil (6), the spray plates (7) being used to spray water and cooling oil on the needle tips and needle tails of the circular knitting machine needles for cooling; characterized in that: The inner sides of the two limiting rails (3) are slidably connected to a hollow support frame (9) via a driving motor (8); a receiving plate (10) is fixedly connected to the surface of the support frame (9); a plurality of V-shaped positioning grooves (11) with horizontal bottoms are provided on the surface of the receiving plate (10); a fixed block (12) extending to the position of the positioning groove (11) is fixedly connected to the surface of the receiving plate (10); a positioning block (14) is connected to the surface of the fixed block (12) via a first telescopic plate (13); a positioning mechanism for positioning the bent portion at the middle position of the circular knitting machine needle is provided on the surface of the positioning block (14); a receiving block (16) is connected to the surface of the receiving block (16) via a second telescopic plate (15); a retractable stabilizing rod (17) is connected between the receiving block (16) and the receiving plate (10). The surfaces of the receiving block (16) and the fixed block (12) are both provided with limiting mechanisms for limiting the circular knitting machine needle. The surface of the limiting rail (3) is provided with openings (18) corresponding to the positions of the first heating coil (5) and the second heating coil (6). The surface of the base (1) is fixedly connected with a first guide rail (19) located below the support frame (9). The middle position of the first guide rail (19) is provided with multiple different undulating sections. The positioning block (14) slides in the first guide rail (19). The first guide rail (19) is used to guide the positioning block (14) to move up and down during the movement of the positioning block (14), and the circular knitting machine needle is driven to move through the positioning block (14) and the positioning mechanism to move the needle tip and needle tail of the circular knitting machine needle to the positions of the first heating coil (5) and the second heating coil (6) respectively.

2. The circulating cooling type circular knitting machine needle heat treatment equipment according to claim 1, characterized in that: The positioning mechanism comprises two retractable positioning rods (20) fixedly mounted on the ends of the surface of the positioning block (14) and arranged in a staggered manner. The positioning rods (20) are used to position and limit the bending position in the middle of the circular knitting machine needle. The adjacent sides and ends of the two positioning rods (20) are both provided with inclined surfaces.

3. The circulating cooling type circular knitting machine needle heat treatment equipment according to claim 2, characterized in that: The limiting mechanism comprises a pressure plate (22) respectively mounted on the surface of the fixed block (12) and the receiving block (16) through a retractable driving member (21), the end of the pressure plate (22) being an inclined surface and the pressure plate (22) passing through the receiving plate (10) and extending into the interior of the positioning groove (11), and the pressure plate (22) is used to limit the position of the ends of the circular knitting machine needles on both sides of the positioning rod (20).

4. The circulating cooling type circular knitting machine needle heat treatment equipment according to claim 1, characterized in that: A limiting block (23) and a guide block (24) are respectively provided in the positioning groove (11) at the positions corresponding to the needle tip and the needle tail of the circular machine needle. The upper end of the guide block (24) is a bevel for guiding the position of the circular machine needle. A limiting groove (25) having the same shape as the curved hook of the circular machine needle tip is provided on the surface of the limiting block (23). The edge of the limiting groove (25) is a bevel. A guide groove (26) is provided on the surface of the limiting rail (3) at the positions corresponding to the limiting block (23) and the guide block (24). The guide groove (26) is used to guide the limiting block (23) or the guide block (24) to move downward when the circular machine needle moves to the position of the opening (18).

5. The circulating cooling type circular knitting machine needle heat treatment equipment according to claim 4, characterized in that: A second guide rail (27) is fixedly connected to the surface of the base (1), and the second guide rail (27) is located above the first guide rail (19). The bottom of the limiting block (23) slides in the second guide rail (27). The second guide rail (27) is used to guide the limiting block (23) and push the needle tail of the circular knitting machine to move within the range of the second heating coil (6). The limiting block (23) slides in the guide groove (26) through the telescopic rod (28).

6. The circulating cooling type circular knitting machine needle heat treatment equipment according to claim 2, characterized in that: A groove (29) is provided on the surface of the positioning block (14) at a position corresponding to the positioning rod (20), and the groove (29) is an inclined surface corresponding to the end of the positioning rod (20). The bottom of the positioning rod (20) is fixedly connected to a fixing frame (30) that passes through the positioning block (14). The fixing frame (30) is located below the positioning block (14) and has an inclined surface on one side. When the fixing frame (30) is close to the support frame (9), the support frame (9) drives the positioning rod (20) to move into the groove (29) by squeezing the fixing frame (30).

7. The circulating cooling type circular knitting machine needle heat treatment equipment according to claim 5, characterized in that: The position where the second guide rail (27) crosses the first guide rail (19) is elastically hinged with a swing rod (32) through a rotating column (31). The swing rod (32) is used to give way when the positioning block (14) moves along the first guide rail (19). The bottom of the second guide rail (27) is slidably connected to a limiting rod (33). A limiting groove (34) is provided on the surface of the rotating column (31) away from the support frame (9). The limiting rod (33) is in contact with the surface of the rotating column (31) close to the support frame (9). The positioning block (14) and the limiting block (23) are arranged in a staggered manner inside the first guide rail (19) and the second guide rail (27) when sliding.

8. The circulating cooling type circular knitting machine needle heat treatment equipment according to claim 3, characterized in that: The surface of the receiving block (16) is slidably connected to a sliding block (35) that penetrates the receiving block (16) in an upward and downward manner. The surface of the sliding block (35) is provided with a Y-shaped guiding inclined surface (36). The surface of the sliding block (35) is provided with an inclined groove (37). The surface of the pressing plate (22) is fixedly connected to an extension rod (38), and the extension rod (38) slides in the inclined groove (37).

9. The circulating cooling type circular knitting machine needle heat treatment equipment according to claim 8, characterized in that: The side of the sliding block (35) is fixedly connected to an extrusion block (39) with an inclined surface on one side, and the bottom of the positioning block (14) is fixedly connected to an extrusion rod (40) with an L-shaped end having an inclined surface at a position corresponding to the extrusion block (39). The extrusion rod (40) is used to extrude the extrusion block (39) downward when the extrusion block (39) approaches the extrusion rod (40), and the tail end of the inclined groove (37) is bent upward.

10. The circulating cooling type circular knitting machine needle heat treatment equipment according to claim 1, characterized in that: A partition plate (41) is fixedly connected between the surface of the limiting rail (3) corresponding to the first heating coil (5) and the spray plate (7) and the second heating coil (6) and the spray plate (7), and a blocking plate (42) is hingedly connected to the partition plate (41) at a position corresponding to the opening (18). A plurality of support rods (43) not affected by the second heating coil (6) are fixedly connected between the partition plate (41) and the mounting plate (4) on the side close to the second heating coil (6), and both sides of the upper ends of the support rods (43) are inclined surfaces.

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