Head cooling device for plastic extruders

Abstract

The application provides a head cooling device for a plastic extruder, which comprises a positioning ring, a filling ring, two mounting rings and a heat exchange assembly. The positioning ring is used for sleeving the outer periphery of the head and has a gap between the outer wall of the head. The inner periphery surface of the positioning ring is provided with an annular groove extending along the circumference and connected at the head and tail. The filling ring is arranged on the inner side of the positioning ring and is adapted to close the opening of the annular groove and is used for sleeving the head to realize heat exchange between the head and the filling ring and between the filling ring and the inside of the annular groove. The two mounting rings are respectively connected on the two sides of the filling ring and are connected with the positioning ring through separable connection structures. The heat exchange assembly is communicated with the annular groove and is used for inputting cooling medium into the annular groove and receiving the cooling medium which has been discharged from the annular groove and has been heat-exchanged with the annular groove. The head cooling device for the plastic extruder can be adapted to different specifications of the head, can ensure the heat exchange efficiency of the head and can ensure the cooling effect of the head.

Description

Technical Field

[0001] This application belongs to the field of plastic processing technology, and specifically relates to a die head cooling device for a plastic extruder. Background Technology

[0002] A plastic extruder is a piece of equipment used for plastic processing. It primarily transforms solid plastics into a homogeneous melt and shapes it into various plastic products through an extruder head. To avoid affecting the plasticizing effect of the plastic products, control the shape and dimensional stability of the extrudate, and minimize impact on production efficiency and equipment load, plastic extruders are typically equipped with a cooling device at the die head.

[0003] In the prior art, the cooling device includes a cooling ring fitted around the outer periphery of the machine head, and a cooling component that exchanges heat with the cooling ring. In actual use, the cooling component ensures that the temperature of the cooling ring is within a safe range, and the cooling ring remains in contact with the outer wall of the machine head for heat exchange, thereby ensuring that the temperature of the machine head is within another safe range.

[0004] The inventors discovered that in order to manufacture different plastic products, the die head usually adopts different specifications. However, the existing cooling ring has a single inner diameter, which easily causes gaps between the inner wall of the ring and the outer wall of the die head, resulting in a technical problem of reduced heat exchange efficiency and affecting the temperature control effect of the die head. Utility Model Content

[0005] This application provides a die head cooling device for a plastic extruder, designed to adapt to different die heads and ensure the heat exchange efficiency of the die head, thereby guaranteeing the cooling effect on the die head.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0007] A die head cooling device for a plastic extruder is provided, comprising:

[0008] A positioning ring is used to fit around the outer periphery of the machine head and has a gap between it and the outer wall of the machine head; the inner circumferential surface of the positioning ring is provided with an annular groove that extends along its circumference and is connected end to end.

[0009] A filling ring is disposed inside the positioning ring and is adapted to close the opening of the annular groove to facilitate heat exchange with the annular groove. The filling ring is used to be fitted onto the machine head so that the inner circumferential surface of the filling ring is in contact with the outer circumferential surface of the machine head, and the filling ring exchanges heat with the machine head.

[0010] Two mounting rings are arranged side-by-side on both sides of the filling ring along its axial direction and are both fixedly connected to the filling ring; each mounting ring is connected to the positioning ring via a detachable connection structure to restrict movement of the filling ring relative to the positioning ring; and

[0011] A heat exchange assembly, connected to the annular groove, is used to input cooling medium into the annular groove and to receive cooling medium discharged from the annular groove that exchanges heat with the filling ring.

[0012] In one possible implementation, the separable connection structure includes:

[0013] A slot is formed on the outer circumferential surface of the mounting ring; and

[0014] The insert is slidably connected to the positioning ring along the radial direction of the positioning ring and is adapted to be inserted into the slot;

[0015] The insert block and the positioning ring have a locking structure to fix the insert block in the position where it is inserted into the slot.

[0016] In one possible implementation, a guide groove is provided on the inner peripheral wall of the positioning ring, and the insert block is slidably inserted into the guide groove;

[0017] The positioning ring has a strip-shaped hole on its outer side that communicates with the guide groove, and the strip-shaped hole extends along the axial direction of the guide groove; and an operating rod that passes through the guide groove and extends out is fixedly connected to the insert block.

[0018] In one possible implementation, the locking structure includes:

[0019] A positioning nut is fixedly installed on the inner wall of the guide groove;

[0020] A stop bolt is slidably connected to the insert along the axial direction of the slot and is adapted to be threadedly connected to the positioning nut to restrict the movement of the insert relative to the positioning ring.

[0021] In one possible implementation, the insert has a through hole extending axially along the strip hole, and the through hole passes through the operating rod;

[0022] The stop bolt is slidably inserted into the through hole, and the head of the stop bolt is adapted to abut the protruding end of the operating rod.

[0023] In one possible implementation, the inner wall of the guide groove is provided with an installation groove suitable for the positioning nut to be embedded, and the bottom of the installation groove is provided with a recessed groove suitable for the insertion of the stop bolt.

[0024] In one possible implementation, the heat exchange component includes:

[0025] A water storage tank, used to be fixed to the outside of the positioning ring, and connected to the annular groove via a water inlet pipe; and

[0026] A water pump is connected to the water storage tank via a water pipe; a heat exchanger is connected to the water pipe, and the heat exchanger is used to reduce the temperature of the liquid passing through the water pipe; furthermore, the water pump is also connected to the annular groove via an outlet pipe, so as to drain water into the annular groove.

[0027] In one possible implementation, an inlet and an outlet are provided on the outer peripheral wall of the positioning ring;

[0028] The water inlet faces upward and is connected to the water outlet pipe; the water outlet faces downward and is connected to the water inlet pipe; and a valve for controlling the flow of liquid is connected to the water pipe, and the valve is located between the heat exchanger and the water storage tank.

[0029] In one possible implementation, the filling ring has protruding rings on both sides facing its own axial direction, and the mounting ring has grooves on the side facing the filling ring suitable for the protruding rings to be inserted.

[0030] In one possible implementation, the thermal conductivity of the filler ring is greater than that of the mounting ring.

[0031] In this embodiment, when the positioning ring is fitted onto the outer circumference of the machine head, a gap is formed between the inner circumferential surface of the positioning ring and the outer circumferential surface of the machine head; and the filling ring fills this gap to ensure heat conduction. Simultaneously, the filling ring is fixed to the inner circumference of the positioning ring by a mounting ring, and the mounting ring is connected to the positioning ring via a detachable connection structure. When it is necessary to adapt to different specifications of machine heads, the mounting ring and positioning ring can be separated by removing the detachable connection structure, allowing for the replacement of filling rings of different specifications, eliminating the need to replace the positioning ring itself.

[0032] When used for cooling the machine head, the heat exchange assembly discharges the cooling medium into the annular groove. After the annular groove is filled with the cooling medium and the cooling medium exchanges heat with the filling ring, the cooling medium is discharged back into the heat exchange assembly for recycling. Based on this, since the filling ring is in contact with the outer peripheral wall of the machine head, the filling ring can exchange heat with the machine head to achieve the technical purpose of cooling the machine head.

[0033] The die head cooling device for plastic extruders provided in this embodiment, compared with the prior art, can quickly replace filler rings of different thicknesses to adapt to die heads of different specifications, ensuring the heat exchange efficiency of the die head and thus guaranteeing the cooling effect of the die head. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a three-dimensional structural diagram of the head cooling device provided in the embodiments of this application;

[0036] Figure 2 for Figure 1 Front view;

[0037] Figure 3 For along Figure 2 Cross-sectional view of line AA in the middle;

[0038] Figure 4 for Figure 3 A magnified view of a portion of the middle circle C;

[0039] Figure 5 for Figure 2 A magnified view of a portion of the middle circle at point B;

[0040] Figure 6 This is a partially enlarged schematic diagram of the locking structure used in the embodiments of this application from a cross-sectional view.

[0041] Figure 7 This is a cross-sectional view of the positioning ring used in the embodiments of this application;

[0042] Figure 8 for Figure 7 A magnified view of a portion of the middle circle at point D;

[0043] Figure 9 This is a three-dimensional structural diagram of the mounting ring used in the embodiments of this application;

[0044] Figure 10 This is an exploded view of the locking structure used in the embodiments of this application;

[0045] Explanation of reference numerals in the attached drawings: 1. Positioning ring; 11. Annular groove; 12. Guide groove; 121. Mounting groove; 122. Sinking groove; 13. Strip hole; 14. Inlet; 15. Outlet; 2. Filling ring; 21. Protruding ring; 3. Mounting ring; 31. Groove; 4. Heat exchange assembly; 41. Water tank; 411. Inlet pipe; 42. Water pump; 421. Outlet pipe; 5. Separable connection structure; 51. Slot; 52. Insert block; 521. Operating rod; 522. Through hole; 6. Locking structure; 61. Positioning nut; 62. Stop bolt; 7. Water pipe; 71. Heat exchanger; 72. Valve. Detailed Implementation

[0046] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0047] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0048] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0050] Please refer to the following: Figures 1 to 10 The die head cooling device for a plastic extruder provided in this application will now be described. The die head cooling device for a plastic extruder proposed in this application includes a positioning ring 1, a filling ring 2, two mounting rings 3, and a heat exchange assembly 4.

[0051] The positioning ring 1 is used to be coaxially sleeved on the outer periphery of the machine head, and when the positioning ring 1 is sleeved on the outer periphery of the machine head, there is a gap between the inner circumferential surface of the positioning ring 1 and the outer wall of the machine head; based on this, the inner circumferential surface of the positioning ring 1 is provided with an annular groove 11 that extends along its circumference and is connected end to end.

[0052] The filling ring 2 is disposed inside the positioning ring 1 and is adapted to close the opening of the annular groove 11 to form a closed annular cavity. The filling ring 2 is also capable of heat exchange with the inside of the annular groove 11 (i.e., the annular cavity). In actual use, the filling ring 2 is used to fit on the machine head, and the inner circumferential surface of the filling ring 2 is in contact with the outer circumferential surface of the machine head so that heat exchange can occur between the filling ring 2 and the machine head.

[0053] Two mounting rings 3 are arranged side by side on both sides of the filling ring 2 along the axial direction of the filling ring 2, and are both fixedly connected to the filling ring 2. In this embodiment, the connection method between the filling ring 2 and the mounting ring 3 can be welding, bonding, mechanical connection, etc. Each mounting ring 3 is connected to the positioning ring 1 through at least one set of separable connection structures 5 to restrict the movement of the filling ring 2 relative to the positioning ring 1.

[0054] The heat exchange assembly 4 is fixed on the horizontal surface outside the machine head, and the inlet and outlet of the heat exchange assembly 4 are connected to the annular groove 11 for inputting cooling medium into the annular groove 11, and receiving cooling medium discharged from the annular groove 11 that has undergone heat exchange with the filling ring 2, and for cooling the cooling medium that has undergone heat exchange to ensure that it can be cyclically applied to the heat exchange task of the filling ring 2.

[0055] In this embodiment, when the positioning ring 1 is fitted onto the outer circumference of the machine head, a gap is formed between the inner circumferential surface of the positioning ring 1 and the outer circumferential surface of the machine head; and the filling ring 2 fills this gap to ensure heat conduction. Simultaneously, the filling ring 2 is fixed to the inner circumference of the positioning ring 1 by the mounting ring 3, and the mounting ring 3 is connected to the positioning ring 1 by a detachable connection structure 5. When it is necessary to adapt to different specifications of machine heads, the mounting ring 3 and the positioning ring 1 can be separated by removing the detachable connection structure 5, allowing for the replacement of filling rings 2 of different specifications, eliminating the need to replace the positioning ring 1.

[0056] When used for cooling the machine head, the heat exchange assembly 4 discharges the cooling medium into the annular groove 11. After the annular groove 11 is filled with the cooling medium and the cooling medium exchanges heat with the filling ring 2, the cooling medium is discharged back into the heat exchange assembly 4 for recycling. Based on this, since the filling ring 2 is in contact with the outer peripheral wall of the machine head, the filling ring 2 can exchange heat with the machine head to achieve the technical purpose of cooling the machine head.

[0057] The die head cooling device for plastic extruders provided in this embodiment, compared with the prior art, can quickly replace the filler rings 2 of different thicknesses to adapt to different specifications of die heads, ensuring the heat exchange efficiency of the die head and thus guaranteeing the cooling effect of the die head.

[0058] In some embodiments, such as Figure 6 As shown, the separable connection structure 5 includes a slot 51 and a plug 52.

[0059] The slot 51 is formed on the outer peripheral surface of the mounting ring 3 and extends radially outward along the mounting ring 3.

[0060] The insert 52 is slidably connected to the positioning ring 1 along the radial direction of the positioning ring 1, and when the mounting ring 3 is rotated relative to the positioning ring 1 so that the insert 52 faces the slot 51, the insert 52 is adapted to be inserted into the slot 51.

[0061] Furthermore, a locking structure 6 is provided between the insert block 52 and the positioning ring 1 to fix the insert block 52 in the position of the insertion slot 51, thereby restricting the rotation of the mounting ring 3 relative to the positioning ring 1 and restricting the movement of the mounting ring 3 relative to the positioning ring 1 (along its own axial direction).

[0062] In some embodiments, such as Figure 4 and Figure 8 As shown, a guide groove 12 is provided on the inner peripheral wall of the positioning ring 1, and the aforementioned insert block 52 is slidably inserted into the guide groove 12.

[0063] The outer side of the positioning ring 1 is provided with a strip hole 13 that communicates with the guide groove 12. The strip hole 13 extends along the axial direction of the guide groove 12. Based on this, an operating rod 521 that passes through the guide groove 12 and extends out is fixedly connected to the insert block 52.

[0064] In actual use, the plug 52 can be driven by manually pulling the operating lever 521, so as to achieve the technical purpose of inserting or removing the plug 52 into the slot 51.

[0065] In some embodiments, such as Figure 6 and Figure 10 As shown, the locking structure 6 includes a positioning nut 61 and a stop bolt 62.

[0066] The positioning nut 61 is fixedly installed on the inner wall of the guide groove 12, and its axis is parallel to the axis of the strip hole 13.

[0067] The stop bolt 62 is slidably connected to the insert block 52 along the axial direction of the strip hole 13. The axial direction of the stop bolt 62 is parallel to the axial direction of the strip hole 13, and the stop bolt 62 has a degree of freedom to rotate relative to the insert block 52 about its own central axis.

[0068] In actual use, the stop bolt 62 is adapted to be threadedly connected to the positioning nut 61 to limit the movement of the insert 52 relative to the positioning ring 1.

[0069] In some embodiments, such as Figure 6 and Figure 10 As shown, the insert 52 has a through hole 522 extending axially along the strip hole 13, and this through hole 522 also extends through the operating rod 521. Based on this, the stop bolt 62 is slidably inserted into the through hole 522, and the head of the stop bolt 62 is adapted to abut against the protruding end of the operating rod 521 to limit further screwing of the stop bolt 62.

[0070] In some embodiments, such as Figure 4 , Figure 6 and Figure 8As shown, the inner wall of the guide groove 12 is provided with an installation groove 121 suitable for the positioning nut 61 to be embedded, and the bottom of the installation groove 121 is provided with a recessed groove 122 suitable for the insertion of the stop bolt 62, so as to ensure a stable connection between the stop bolt 62 and the positioning nut 61.

[0071] In some embodiments, such as Figure 1 and Figure 2 As shown, the heat exchange assembly 4 includes a water storage tank 41 and a water pump 42.

[0072] The water storage tank 41 is fixed to the outside of the positioning ring 1 and is connected to the annular groove 11 through the water inlet pipe 411 so that the cooling medium in the annular groove 11 is discharged into the water storage tank 41 through the water inlet pipe 411.

[0073] The water pump 42 is fixed on the horizontal surface outside the water storage tank 41, and its water inlet is connected to the water storage tank 41 through the water pipe 7 so that the cooling medium in the water storage tank 41 is discharged into the water pump 42 through the water pipe 7.

[0074] A heat exchanger 71 is connected to the water pipe 7. In actual use, the heat exchanger 71 is used to reduce the temperature of the liquid passing through the water pipe 7, so as to ensure that the cooling medium entering the water pump 42 can be directly reused for cooling the material. In addition, the outlet port of the water pump 42 is also connected to the annular groove 11 through the outlet pipe 421, so as to facilitate drainage into the annular groove 11.

[0075] In some embodiments, such as Figure 2 and Figure 7 As shown, the outer peripheral wall of the positioning ring 1 is provided with an inlet 14 and an outlet 15.

[0076] The inlet 14 faces upward and is connected to the outlet pipe 421; the outlet 15 faces downward and is connected to the inlet pipe 411.

[0077] By adopting this technical solution, the cooling medium enters from the inlet 14 at the upper end of the annular groove 11 and flows downward under the action of gravity, so as to be discharged through the outlet 15 at the lower end.

[0078] Based on the aforementioned technical solution, a valve 72 for controlling the flow of liquid is connected to the water pipe 7, and this valve 72 is located between the heat exchanger 71 and the water storage tank 41 to control the efficiency of the cooling medium entering the heat exchanger 71, thereby preventing the heat exchanger 71 from operating at overclock.

[0079] In some embodiments, such as Figure 6 and Figure 9 As shown, the filling ring 2 has protruding rings 21 on both sides facing its own axial direction, and the mounting ring 3 has a groove 31 on the side facing the filling ring 2, which is suitable for the protruding rings 21 to be inserted.

[0080] The interlocking relationship between the convex ring 21 and the groove 31 increases the contact area between the filling ring 2 and the mounting ring 3, thereby ensuring the connection strength between the two.

[0081] In some embodiments, such as Figure 3 , Figure 4 and Figure 6 As shown, the thermal conductivity of the filling ring 2 is greater than that of the mounting ring 3, to ensure that heat is mainly transferred to the annular groove 11 through the filling ring 2.

[0082] The above content is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A die head cooling device for a plastic extruder, characterized in that, include: A positioning ring is used to fit around the outer periphery of the machine head and has a gap between it and the outer wall of the machine head; the inner circumferential surface of the positioning ring is provided with an annular groove that extends along its circumference and is connected end to end. A filling ring is disposed inside the positioning ring and is adapted to close the opening of the annular groove to facilitate heat exchange with the annular groove. The filling ring is used to be fitted onto the machine head so that the inner circumferential surface of the filling ring is in contact with the outer circumferential surface of the machine head, and the filling ring exchanges heat with the machine head. Two mounting rings are arranged side by side on both sides of the filling ring along the axial direction of the filling ring and are fixedly connected to the filling ring; each mounting ring is connected to the positioning ring through a detachable connection structure to restrict the movement of the filling ring relative to the positioning ring; as well as A heat exchange assembly, connected to the annular groove, is used to input cooling medium into the annular groove and to receive cooling medium discharged from the annular groove that exchanges heat with the filling ring.

2. The die head cooling device for a plastic extruder as described in claim 1, characterized in that, The separable connection structure includes: A slot is formed on the outer circumferential surface of the mounting ring; and The insert is slidably connected to the positioning ring along the radial direction of the positioning ring and is adapted to be inserted into the slot; The insert block and the positioning ring have a locking structure to fix the insert block in the position where it is inserted into the slot.

3. The die head cooling device for a plastic extruder as described in claim 2, characterized in that, A guide groove is provided on the inner peripheral wall of the positioning ring, and the insert block is slidably inserted into the guide groove; The positioning ring has a strip-shaped hole on its outer side that communicates with the guide groove, and the strip-shaped hole extends along the axial direction of the guide groove; and an operating rod that passes through the guide groove and extends out is fixedly connected to the insert block.

4. The die head cooling device for a plastic extruder as described in claim 3, characterized in that, The locking structure includes: A positioning nut is fixedly installed on the inner wall of the guide groove; A stop bolt is slidably connected to the insert along the axial direction of the slot and is adapted to be threadedly connected to the positioning nut to restrict the movement of the insert relative to the positioning ring.

5. The die head cooling device for a plastic extruder as described in claim 4, characterized in that, The insert has a through hole that extends axially along the strip hole, and the through hole passes through the operating rod. The stop bolt is slidably inserted into the through hole, and the head of the stop bolt is adapted to abut the protruding end of the operating rod.

6. The die head cooling device for a plastic extruder as described in claim 4, characterized in that, The inner wall of the guide groove is provided with an installation groove suitable for the positioning nut to be embedded, and the bottom of the installation groove is provided with a recessed groove suitable for the insertion of the stop bolt.

7. The die head cooling device for a plastic extruder as described in claim 1, characterized in that, The heat exchange assembly includes: A water storage tank, used to be fixed to the outside of the positioning ring, and connected to the annular groove via a water inlet pipe; and A water pump is connected to the water storage tank via a water pipe; a heat exchanger is connected to the water pipe, and the heat exchanger is used to reduce the temperature of the liquid passing through the water pipe; furthermore, the water pump is also connected to the annular groove via an outlet pipe, so as to drain water into the annular groove.

8. The die head cooling device for a plastic extruder as described in claim 7, characterized in that, The positioning ring has an inlet and an outlet on its outer peripheral wall; The water inlet faces upward and is connected to the water outlet pipe; the water outlet faces downward and is connected to the water inlet pipe; and a valve for controlling the flow of liquid is connected to the water pipe, and the valve is located between the heat exchanger and the water storage tank.

9. The die head cooling device for a plastic extruder as described in claim 1, characterized in that, The filling ring has protruding rings on both sides facing its own axial direction, and the mounting ring has a groove on the side facing the filling ring that is suitable for the protruding rings to be inserted.

10. The die head cooling device for a plastic extruder as described in any one of claims 1-9, characterized in that, The thermal conductivity of the filler ring is greater than that of the mounting ring.

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