Die head structure with heat conduction pipe for heat conduction
By designing the flow channel structure and heat conduction mechanism in the mold head, the problem of insufficient cooling of the mold head is solved, the compact molding and temperature control of the molten material are achieved, and the molding quality of the pipe fittings is improved.
Patent Information
- Application Number
- CN202421939197.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-12
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-08-12
AI Technical Summary
The existing mold head structure has insufficient cooling methods during the heat pipe molding process, resulting in uneven molding of the molten material and difficulty in controlling the temperature.
A mold main structure including runner, inlet cavity, extrusion cavity and horizontal flow cavity was designed. Combined with the heat conduction mechanism and spiral cavity, the temperature and flow of the molten material were controlled by the heat conduction medium to ensure the molding quality.
It achieves compact molding and temperature control of the molten material, improves the molding flatness and quality of the pipe fittings, ensures that the molten material flows within the appropriate temperature range, and optimizes the molding effect.
Smart Images
Figure CN223407422U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mold processing equipment, in particular to a mold head structure with a heat-conducting heat pipe. Background Art
[0002] An extruder is a device that heats polymer materials such as plastic or rubber to a molten state and continuously extrude the molten material into shapes through the rotation and pressure of the screw. It is widely used in the production of plastic products such as pipes, profiles, plates, films, etc. When producing pipes, a mold head is generally set at the output end of the extruder to shape the pipe output.
[0003] The die head at the output end of the extruder is crucial for the molding of pipe fittings. There are many types of die heads used to produce different types of pipe fittings. Among them, the die head directly connected to the output end of the extruder is widely used. However, the internal structure of this type of die head is relatively simple. When the molten material is molded into the shape of the pipe, its cooling method and flatness during extrusion molding are both lacking.
[0004] Based on the above situation, it is necessary to design a mold head structure with heat conduction pipes to solve the above problems. Utility Model Content
[0005] The utility model provides a mold head structure with heat-conducting pipes for heat conduction, so as to solve the problems of the mold head structure with heat-conducting pipes in the prior art.
[0006] The technical problem solved by the present invention is achieved by the following technical solutions:
[0007] A heat-conducting mold head structure comprises a mold body with a flow channel opened inside, the input end of the mold body is connected with the output end of an extruder, the mold body is composed of a front end shell and a rear end shell, and a core rod is provided inside the mold body, a flow cavity is formed between the outer surface of the core rod and the inner side wall of the flow channel, the input end and output end of the flow cavity are respectively connected with the input end and output end of the mold body, a heat-conducting mechanism is provided at the output end of the flow cavity, and the heat-conducting mechanism is arranged on the rear end shell, and the heat-conducting mechanism is used to change the temperature of the rear end shell and the inside of the flow cavity.
[0008] Preferably, the flow cavity is composed of an inlet cavity connected to the input end of the mold body, an extrusion cavity connected to the output end of the inlet cavity, and a horizontal flow cavity connected to the output end of the extrusion cavity, and the output end position of the horizontal flow cavity is consistent with the output end position of the mold body.
[0009] Preferably, the internal space size of the inlet cavity gradually decreases from the input end of the main body to the output end of the extrusion cavity, the internal space size of the extrusion cavity gradually decreases from the input end of the main body to the output end of the horizontal flow cavity, and the internal space size of the horizontal flow cavity remains unchanged from the input end of the main body to the output end of the main body.
[0010] Preferably, the heat conduction mechanism includes an annular cavity and an inlet and an outlet opened on the annular cavity. The annular cavity is opened inside the rear end shell and close to the output end of the horizontal flow cavity.
[0011] Preferably, the inlet 1 and the outlet 1 are symmetrically arranged on the annular cavity, and the inlet 1 is arranged near the output end of the rear end shell, and the outlet 1 is arranged near the input end of the rear end shell.
[0012] Preferably, the heat conduction mechanism also includes a spiral cavity and an inlet channel and an outlet channel connecting the spiral cavity with the outside world. The spiral cavity is opened inside the rear end shell and is located at the waist position of the horizontal flow cavity. The input end and output end of the spiral cavity are respectively close to the output end and input end of the rear end shell, and the output end of the inlet channel is connected to the input end of the spiral cavity, and the input end of the outlet channel is connected to the output end of the spiral cavity.
[0013] Preferably, the rear end shell is connected to the front end shell through a fixing ring and a bolt, and the input end of the rear end shell extends to the interior of the front end shell, and a fixing bracket for fixing the core rod is connected to the input end of the rear end shell.
[0014] Preferably, the front end shell is connected with a plurality of bolts 2 whose axes are perpendicular to the axis of the front end shell, and the plurality of bolts 2 are equidistantly arranged around the central axis of the front end shell, and one end of the bolt 2 passes through the front end shell and is in movable contact with the outer side wall of the input end of the rear end shell.
[0015] The beneficial effects of the present invention are as follows: by connecting a mold body having a flow cavity and a core rod at the output end of the extruder, and in order to ensure the compactness of the molten material when it flows from the input end to the output end of the mold body, an introduction cavity, an extrusion cavity and a horizontal flow cavity are provided on the flow cavity, so that the inside of the molten material is gradually squeezed and compacted from being introduced to being output, thereby ensuring the flatness of the molten material when it is extruded and formed, and when the molten material is inside the horizontal flow cavity, it maintains a suitable temperature flow under the action of the spiral cavity, and then is finally output and formed under the action of the annular cavity. In this process, the internal structure design of the mold body can lead out the molten material with higher flatness and suitable temperature, thereby ensuring the effect of pipe forming. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the implementation scheme of the present invention or the technical scheme in the prior art, the drawings required for use in the implementation scheme or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation schemes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.
[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model:
[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model:
[0019] Figure 3 For the utility model Figure 2 A magnified schematic diagram of the structure at point B in the middle;
[0020] Figure 4 For the utility model Figure 2 A schematic diagram of the structure at center A;
[0021] Figure 5 This is a schematic diagram of the flow channel cross-section structure of the utility model;
[0022] Figure 6 For the utility model Figure 2 Schematic diagram of the middle part structure;
[0023] Figure 7 It is a schematic diagram of the explosion structure of the utility model.
[0024] In the figure, 1. mold body; 2. front end shell; 3. rear end shell; 4. core rod; 5. flow channel; 6. flow cavity; 7. inlet cavity; 8. extrusion cavity; 9. horizontal flow cavity; 10. annular cavity; 101. inlet 1; 102. outlet 1; 11. spiral cavity; 110. inlet channel; 111. outlet channel; 12. fixing bracket; 13. fixing ring; 14. bolt 1; 15. bolt 2. DETAILED DESCRIPTION
[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.
[0026] Reference Figure 1-Figure 7As shown, a heat-conducting mold head structure for heat conduction of a heat pipe includes a mold body 1 with a flow channel 5 opened inside. The input end of the mold body 1 is connected to the output end of the extruder. When in use, the extruder (this equipment is a prior art equipment, not shown in the figure) introduces the molten material into the mold head, and the molten material is discharged from the output end of the mold head to form a corresponding pipe shape.
[0027] The mold body 1 is composed of a front end shell 2 and a rear end shell 3, and a core rod 4 is provided inside the mold body 1. The core rod 4 is an existing technical solution and will not be described in detail. However, the selection of the core rod 4 must be able to adapt to the high temperature it experiences during the extrusion process and be able to maintain sufficient strength and thermal stability to avoid deformation or damage at high temperatures. At the same time, the surface of the core rod 4 needs to have a certain smoothness to reduce the friction and damage of the molten material when passing through. A flow cavity 6 is formed between the outer surface of the core rod 4 and the inner wall of the flow channel 5. The input and output ends of the flow cavity 6 are respectively connected to the input and output ends of the mold body 1. The setting of the flow cavity 6 inside the mold body 1 ensures the smooth flow of the molten material and its final molding.
[0028] In order to enable the mold head to quickly form and shape the pipe fittings when outputting them, it is necessary to set a heat-conducting mechanism on the mold head to dissipate the heat on the mold head, thereby controlling the temperature of the molten material when it is output, and thus better forming the shape of the pipe fittings. Therefore, a heat-conducting mechanism is provided at the output end of the flow cavity 6, and the heat-conducting mechanism is provided on the rear end shell 3. The heat-conducting mechanism is used to change the temperature inside the rear end shell 3 and the flow cavity 6.
[0029] Reference Figure 6 As shown, specifically, the flow cavity 6 is composed of an inlet cavity 7 connected to the input end of the mold body 1, an extrusion cavity 8 connected to the output end of the inlet cavity 7, and a horizontal flow cavity 9 connected to the output end of the extrusion cavity 8. The output end position of the horizontal flow cavity 9 is consistent with the output end position of the mold body 1.
[0030] The size of the internal space of the introduction cavity 7 gradually decreases from the input end of the main body to the output end of the extrusion cavity 8, and the size of the internal space of the extrusion cavity 8 gradually decreases from the input end of the main body to the output end of the advection cavity 9. The size of the internal space of the advection cavity 9 remains unchanged from the input end of the main body to the output end of the main body, forming a certain pressure on the flow of the molten material. The flow mode of the molten material in the flow cavity 6 is that it first flows into the input end of the introduction cavity 7. Because the distance between the inner side wall of the introduction cavity 7 and the outer surface of the core rod 4 continuously decreases from the input end to the output end, Therefore, when the molten material flows, the molten material in the front is continuously compacted. In addition, the output end of the extruder continuously inputs the molten material to the input end of the introduction cavity 7, so the molten material inside the introduction cavity 7 will be continuously squeezed and flowed toward the extrusion cavity 8. During the extrusion process, the gaps generated when the molten material is output are eliminated, so that the molten material fluids are more tightly bonded, and their density is improved. Then the compacted molten material enters the interior of the horizontal flow cavity 9, and is finally output from the output end of the horizontal flow cavity 9.
[0031] Reference Figure 2-6 As shown, the heat conduction mechanism includes an annular cavity 10 and an inlet 101 and an outlet 102 opened on the annular cavity 10. The annular cavity 10 is opened inside the rear end shell 3 and close to the output end of the horizontal flow cavity 9. The inlet 101 and the outlet 102 are symmetrically arranged on the annular cavity 10, and the inlet 101 is arranged close to the output end of the rear end shell 3, and the outlet 102 is arranged close to the input end of the rear end shell 3. The horizontal positions of the inlet 101 and the outlet 102 are different. The main function is to make the heat conduction After the medium (not shown in the figure) can fill the annular cavity 10 as much as possible, it is discharged through the outlet 102. When in use, the heat-conducting medium is introduced into the annular cavity 10 through the inlet 101. The heat-conducting medium will maintain the temperature at the location of the annular cavity 10. The heat-conducting medium flows from the input end position of the annular cavity 10 to its output end position, and is then discharged through the outlet 102. This cycle is repeated. During this process, the annular cavity 10 reduces the temperature of the hot-melt material when it is discharged, plays a cooling role, and allows the molten material to be quickly formed.
[0032] Furthermore, in order to prevent the heat conduction mechanism from only focusing on the heat conduction at the output end of the mold body 1, thereby causing some negative effects on the molten material, because the molten material with a higher temperature will be cooled, which will lead to an inaccurate grasp of the cooling rate of the molten material, thereby causing damage to the pipe body after the molten material is formed, the heat conduction mechanism also includes a spiral cavity 11 and an inlet channel 110 and an outlet channel 111 that connect the spiral cavity 11 with the outside world. After the heat conduction medium is introduced into the spiral cavity 11, the rear end shell 3 can be evenly heat-conducted. The spiral cavity 11 is opened inside the rear end shell 3 and is located at the waist position of the horizontal flow cavity 9. The input end and output end of the spiral cavity 11 are respectively close to the output end and input end of the rear end shell 3, and the output end of the inlet channel 110 is connected to the input end of the spiral cavity 11, and the input end of the outlet channel 111 is connected to the output end of the spiral cavity 11. The spiral cavity 11 is opened at the position of the annular cavity 10 near the input end of the rear end shell 3, and the heat transfer medium (not shown in the figure) is introduced into the spiral cavity 11 through the inlet channel 110. The heat transfer medium The temperature at the location of the spiral cavity 11 will be maintained, and the heat-conducting medium will flow from the input end of the spiral cavity 11 to its output end, and then be discharged through the outlet channel 111. This cycle is repeated to control the temperature at the location of the spiral cavity 11. The control method is mainly that when the temperature of the horizontal flow cavity 9 is too high, the heat-conducting medium absorbs heat and cools it, and when the temperature of the horizontal flow cavity 9 is too low, the heat-conducting medium releases its own heat to the rear end shell 3, so that the temperature value inside the horizontal flow cavity 9 always fluctuates around the preset value, so that the molten material passing through the horizontal flow cavity 9 can maintain the preset temperature flow, which is easy to control and will not cause the temperature of the molten material to fluctuate. When the spiral cavity 11 is used in conjunction with the annular cavity 10, the temperature inside the core rod 4 and the mold body 1 is effectively controlled to ensure that the molten material solidifies and flows within the appropriate temperature range, optimizes the time for the molten material to flow in the rear end shell 3, and optimizes the temperature of the molten material flowing inside the horizontal flow cavity 9, thereby obtaining the required product performance and ensuring the molding effect of the product.
[0033] Reference Figure 6-7 As shown, finally, the rear end housing 3 and the front end housing 2 can be freely disassembled and combined, mainly because the rear end housing 3 is connected to the front end housing 2 through a fixing ring 13 and a bolt 14, and the input end of the rear end housing 3 extends to the interior of the front end housing 2. When the rear end housing 3 is installed on the front end housing 2, a gap is left between the two, which facilitates free adjustment of the rear end housing 3 during subsequent use.
[0034] In order to ensure the stability and convenience of the core rod 4 when installed inside the mold body 1, a fixing bracket 12 for fixing the core rod 4 is connected at the input end of the rear end shell 3. The fixing bracket 12 is a prior art and will not be described in detail. Its main function and purpose is to fix the core rod 4. After the new pump is installed and fixed on the fixing bracket 12, the rear end shell 3 is installed on the front end shell 2.
[0035] The position of the mandrel 4 affects the final forming of the pipe fitting. Therefore, in order to facilitate the adjustment of the mandrel 4, several bolts 2 15 with axes perpendicular to the axis of the front housing 2 are connected to the front housing 2. Several bolts 2 15 are equidistantly arranged around the central axis of the front housing 2. One end of the bolt 2 15 passes through the front housing 2 and is in movable contact with the outer wall of the input end of the rear housing 3. By turning one of the bolts 2 15, the corresponding position of the rear housing 3 can be pushed, thereby moving the mandrel 4 on the fixed bracket 12. In this way, the position of the mandrel 4 can be adjusted, and the balance between the rear housing 3 and the mandrel 4 can be adjusted. The balance is crucial for the use of the mandrel 4 and the mold body 1. Maintaining the correct position of the mandrel 4, combined with the use of the flow cavity 6, can ensure that the material flows evenly inside the mold, avoiding material accumulation or defects caused by uneven flow rate. The mandrel 4 is in a suitable position inside the flow cavity 6, which helps to reduce the deviation of the mandrel 4 caused by asymmetric molten material flow, thereby improving the stability of the mandrel 4 and the extrusion quality.
[0036] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.
Claims
1. A heat pipe heat conduction die head structure, comprising a die main body (1) with a flow channel (5) provided therein, the input end of the die main body (1) being connected to the output end of an extruder, the die main body (1) being composed of a front end shell (2) and a rear end shell (3), and a core rod (4) being provided inside the die main body (1), characterized in that: A flow cavity (6) is formed between the outer surface of the core rod (4) and the inner side wall of the flow channel (5). The input end and the output end of the flow cavity (6) are respectively connected to the input end and the output end of the mold body (1). A heat conduction mechanism is provided at the output end of the flow cavity (6), and the heat conduction mechanism is arranged on the rear end shell (3). The heat conduction mechanism is used to change the internal temperature of the rear end shell (3) and the flow cavity (6).
2. The heat conducting mold head structure of the heat conducting pipe according to claim 1, characterized in that: The flow cavity (6) is composed of an inlet cavity (7) connected to the input end of the mold body (1), an extrusion cavity (8) connected to the output end of the inlet cavity (7), and a horizontal flow cavity (9) connected to the output end of the extrusion cavity (8), and the output end position of the horizontal flow cavity (9) is consistent with the output end position of the mold body (1).
3. The heat conducting mold head structure of the heat conducting pipe according to claim 2, characterized in that: The size of the internal space of the inlet cavity (7) gradually decreases from the input end of the main body toward the output end of the extrusion cavity (8), the size of the internal space of the extrusion cavity (8) gradually decreases from the input end of the main body toward the output end of the horizontal flow cavity (9), and the size of the internal space of the horizontal flow cavity (9) remains unchanged from the input end of the main body toward the output end of the main body.
4. The heat conducting mold head structure of the heat conducting pipe according to claim 2, characterized in that: The heat conduction mechanism comprises an annular cavity (10) and an inlet (101) and an outlet (102) opened on the annular cavity (10). The annular cavity (10) is opened inside the rear end shell (3) and close to the output end of the horizontal flow cavity (9).
5. The heat conducting mold head structure of the heat conducting pipe according to claim 4, characterized in that: The inlet 1 (101) and the outlet 1 (102) are symmetrically arranged on the annular cavity (10), and the inlet 1 (101) is arranged near the output end position of the rear end shell (3), and the outlet 1 (102) is arranged near the input end position of the rear end shell (3).
6. The heat conducting mold head structure of the heat conducting pipe according to claim 2, characterized in that: The heat conduction mechanism further comprises a spiral cavity (11) and an inlet channel (110) and an outlet channel (111) for connecting the spiral cavity (11) with the outside. The spiral cavity (11) is opened inside the rear end shell (3) and is located at the waist of the horizontal flow cavity (9). The input end and the output end of the spiral cavity (11) are respectively close to the output end and the input end of the rear end shell (3). The output end of the inlet channel (110) is connected to the input end of the spiral cavity (11), and the input end of the outlet channel (111) is connected to the output end of the spiral cavity (11).
7. The heat conducting mold head structure of the heat conducting pipe according to claim 1, characterized in that: The rear end housing (3) is connected to the front end housing (2) via a fixing ring (13) and a bolt (14), and the input end of the rear end housing (3) extends into the interior of the front end housing (2). A fixing bracket (12) for fixing the core rod (4) is connected to the input end of the rear end housing (3).
8. The heat conducting mold head structure of the heat conducting pipe according to claim 1, characterized in that: The front end housing (2) is connected to a plurality of bolts (15) whose axes are perpendicular to the axis of the front end housing (2). The plurality of bolts (15) are equidistantly arranged around the central axis of the front end housing (2). One end of the bolt (15) penetrates the front end housing (2) and is in active contact with the outer side wall of the input end of the rear end housing (3).