Air draft heat dissipation structure and forming die
By providing exhaust rods arranged along the axis and through-hole arrays arranged along the axis in the mold cavity, a cyclone air flow is formed, which solves the problem of difficulty in reducing the temperature inside the mold, and achieves rapid cooling and energy consumption reduction in the inner cavity of the mold core, and improves the heat dissipation effect.
Patent Information
- Application Number
- CN202420592093.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-26
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-03-26
AI Technical Summary
In the prior art, the temperature inside the mold is difficult to effectively reduce, resulting in a deterioration of the flow uniformity and deterioration of the molding, which affects production stability.
The exhaust rods arranged along the axis are provided in the mold cavity to draw out the deep high-temperature gas, and a cyclone air flow is formed through a specific array of through holes to improve the heat dissipation effect.
Under the conditions of a low-power exhaust device, the rapid cooling of the inner cavity of the die core is achieved, energy consumption is reduced, and the heat dissipation effect is improved, which is about 30% to 50%.
Smart Images
Figure CN222946162U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of heat dissipation of extruder molds, in particular to an exhaust heat dissipation structure and a molding mold. Background Art
[0002] Constant temperature plays an important role in the stable production of pipes, especially the temperature at the core of the mold has a greater impact on the production of pipes. Low temperature affects the plasticization of materials, increases the melt pressure of the extruder, and makes the product appearance dull. The temperature of the outside of the mold can be reasonably set by the heater temperature controller. However, the inside of the mold is relatively closed. As the heating time increases, the temperature inside the mold will continue to rise, the uniformity of the material flow will deteriorate, it will be difficult to control, and the molding will deteriorate, which will affect the stability of production.
[0003] In the prior art, a hole is generally machined in the mold body to communicate with the inside of the mold, as shown in the following example. Figure 1 As shown, the vent hole 5 is connected to the inside of the mold, and then the vent hole 5 can be connected to an exhaust device, so that the heat inside the mold can be taken out. Although this design can achieve a certain degree of cooling, due to the large radial cross-sectional area of the cavity inside the mold, the cooling efficiency is relatively low in the prior art. If a better cooling effect is to be achieved, a huge power is required. However, if the power of the exhaust device is too large, it will affect the forming of the pipe. Therefore, under normal circumstances, the power of the exhaust device will not be too large, so it is not possible to quickly lower the temperature of the mold core. The measures taken are to turn off the power of the core heater, lower the temperature of the external heater, and wait for the temperature to be moderate before starting production. This production method requires repeated shutdowns for cooling and waiting, and the production efficiency is relatively low. Utility Model Content
[0004] The purpose of the utility model is to provide an exhaust heat dissipation structure and a molding mold. By setting an exhaust rod arranged along the axis in the inner cavity of the mold, high-temperature gas deep inside can be drawn out. Therefore, the inner cavity of the mold core can be quickly cooled down under the condition of a low-power exhaust device, and energy consumption can be reduced.
[0005] The purpose of the utility model can be achieved through the following technical solutions:
[0006] A PE small-size mold internal exhaust heat dissipation structure, comprising:
[0007] An air extraction rod is provided in the inner cavity of the mold and arranged along the axis of the inner cavity of the mold, wherein a first end of the air extraction rod is connected to one end of a ventilation pipeline provided on the mold body, and a through hole is provided on a side surface close to the second end portion;
[0008] An exhaust joint has one end connected to the other end of the ventilation pipeline and the other end connected to the exhaust device.
[0009] The end portion of the second end of the exhaust rod is sealed.
[0010] The through holes are arranged into a plurality of through hole arrays, each through hole array is arranged at equal intervals along the axial direction of the air extraction rod, and:
[0011] In the same through-hole array, the angle Cap formed by the projection of the line connecting the centers of any two adjacent through-holes and any point on the axis of the exhaust rod on the plane where any radial section of the exhaust rod is located is:
[0012] Cap = 360° / (n+1)
[0013] Where: n is the number of through-hole arrays,
[0014] In the same through-hole array, the distance between the projection points of the centers of any two adjacent through-holes on the axis of the exhaust rod is equal to the distance between any two adjacent through-hole arrays.
[0015] In all through hole arrays, the projection points of the centers of the j-i+1th through holes in all the i-th through hole arrays on the axis of the exhaust rod coincide with each other.
[0016] There are three through hole arrays in total.
[0017] The aperture of the second through hole array is larger than the apertures of the other two through hole arrays.
[0018] The diameter of the air extraction rod is equal everywhere.
[0019] The exhaust joint is connected to the exhaust device through a high-temperature resistant steel wire hose.
[0020] The exhaust joint and the high temperature resistant steel wire hose are connected via a quick joint.
[0021] The air extraction rod is connected to the ventilation pipeline via threads.
[0022] A PE pipe forming die comprises the above-mentioned exhaust and heat dissipation structure.
[0023] Compared with the prior art, the utility model has the following beneficial effects:
[0024] 1. By setting an exhaust rod arranged along the axis in the inner cavity of the mold, the high-temperature gas in the deep can be drawn out. Therefore, the inner cavity of the mold core can be quickly cooled down under the condition of a low-power exhaust device, and energy consumption can be reduced.
[0025] 2. By arranging the through holes on the exhaust rod in the above specific manner, it is possible to form a cyclone-like airflow in the mold cavity by relying on a single exhaust device, thereby greatly improving the heat dissipation effect of small power. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 is a schematic diagram of an existing heat dissipation structure;
[0027] Figure 2 It is a schematic diagram of the structure of the utility model;
[0028] Figure 3 A schematic diagram of a projection line of a line connecting some adjacent through holes in the same through hole array and any point on the axis of the air extraction rod;
[0029] Among them: 1. mold core, 2. heater, 3. threading hole, 4. mold body, 5. vent hole, 6. quick connector, 7. exhaust rod, 8. exhaust connector, 9. high temperature resistant steel wire hose, 101 and 102 are projection lines. DETAILED DESCRIPTION
[0030] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and a specific operation process, but the protection scope of the present invention is not limited to the following embodiments.
[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0032] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "proximal", "distal", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Physical quantities in formulas, if not separately marked, should be understood as basic quantities of the International System of Units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation or integration.
[0033] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0034] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0035] A PE small size mold internal exhaust heat dissipation structure, such as Figure 2 As shown, including:
[0036] The exhaust rod 7 is provided in the inner cavity of the mold and arranged along the axis of the inner cavity of the mold. The first end of the exhaust rod 7 is connected to one end of the ventilation pipeline provided on the mold body 4, and a through hole is provided on the side surface near the second end portion;
[0037] The exhaust joint 8 has one end connected to the other end of the ventilation pipeline and the other end connected to the exhaust device.
[0038] By providing an exhaust rod 7 arranged along the axis in the inner cavity of the mold, high-temperature gas in the deep cavity can be drawn out. Therefore, the inner cavity of the mold core can be quickly cooled down under the condition of a low-power exhaust device, and energy consumption can be reduced.
[0039] Under normal circumstances, in most embodiments, the end of the second end of the exhaust rod 7 is sealed, so that when the exhaust device is working, air flow cannot be directly formed through the axial direction of the exhaust rod 7, which is beneficial to the ventilation efficiency at the through hole. The high-temperature gas in the mold cavity enters the interior of the exhaust rod 7 from the through hole, and is then extracted by the exhaust device through the ventilation pipeline and the exhaust joint 8 in turn.
[0040] In some common embodiments, the through holes are arranged in a ring shape around the exhaust rod 7, but this method still requires the exhaust device to provide sufficiently large power. Therefore, in this embodiment, the following improved design is provided. Specifically, the through holes are arranged as a plurality of through hole arrays, and each through hole array is arranged at equal intervals along the axial direction of the exhaust rod 7, and:
[0041] In the same through-hole array, the angle Cap formed by the projection of the line connecting the centers of any two adjacent through-holes and any point on the axis of the air extraction rod 7 on the plane where any radial section of the air extraction rod 7 is located is:
[0042] Cap = 360° / n+1
[0043] Where: n is the number of through-hole arrays,
[0044] In the same through-hole array, the distance between the projection points of the centers of any two adjacent through-holes on the axis of the air extraction rod 7 is equal to the distance between any two adjacent through-hole arrays.
[0045] In all the through hole arrays, the projection points of the centers of the j-i+1th through holes in all the i-th through hole arrays on the axis of the exhaust rod 7 coincide with each other.
[0046] like Figure 3 As shown, for a certain section of the exhaust rod 7, 101 and 102 are two projection lines, which are projections of the line connecting the centers of two adjacent through holes and any point on the axis of the exhaust rod 7 on the plane where any radial section of the exhaust rod 7 is located.
[0047] With such a design, by arranging the through holes on the exhaust rod in the specific manner as mentioned above, it is possible to form a cyclone-like airflow in the inner cavity of the mold by relying on a single exhaust device, thereby greatly improving the heat dissipation effect of small power. Through control experiments, it can be seen that compared with the conventional method of arranging all the through holes in a ring shape with equal spacing on the side of the exhaust rod 7, at the same power, the cooling effect can be improved by about 30% to 50%.
[0048] In addition, in this embodiment, there are three through hole arrays in total. Of course, in other embodiments, other methods may also be used.
[0049] Generally, in some embodiments, the aperture of the second through hole array is larger than the apertures of the other two through hole arrays, so that the wind speed of the formed cyclone can be increased.
[0050] In particular, in this embodiment, the diameter of the air extraction rod 7 is equal everywhere, so that the cyclone will not be weakened due to the change of the diameter.
[0051] In addition, in this embodiment, the exhaust joint 8 is connected to the exhaust device through a high temperature resistant steel wire hose 9, and the exhaust joint 8 and the high temperature resistant steel wire hose 9 are connected through a quick connector 6. In this way, the heat resistance can be improved. In addition, in some embodiments, the exhaust rod 7 is connected to the ventilation pipeline through a threaded connection, which can improve the convenience of disassembly and assembly.
[0052] In addition, the present application can also provide a PE pipe forming mold, including the exhaust and heat dissipation structure as described above.
Claims
1. A PE small-size mold internal exhaust heat dissipation structure, characterized in that: include: An air extraction rod (7) is disposed in the inner cavity of the mold and arranged along the axis of the inner cavity of the mold, a first end of the air extraction rod (7) is connected to one end of a ventilation pipeline disposed on the mold body (4), and a through hole is provided on the side surface of the part close to the second end; An air extraction joint (8) has one end connected to the other end of the ventilation pipeline and the other end connected to the air extraction device.
2. A PE small-size mold internal exhaust and heat dissipation structure according to claim 1, characterized in that: The end portion of the second end of the exhaust rod (7) is sealed.
3. A PE small-size mold internal exhaust and heat dissipation structure according to claim 1, characterized in that: The through holes are arranged into a plurality of through hole arrays, each through hole array being arranged at equal intervals along the axial direction of the air extraction rod (7), and: In the same through-hole array, the angle Cap formed by the projection of the line connecting the centers of any two adjacent through-holes and any point on the axis of the air extraction rod (7) on the plane where any radial cross section of the air extraction rod (7) is located is: Cap = 360° / (n+1) Where: n is the number of through-hole arrays, In the same through-hole array, the distance between the projection points of the centers of any two adjacent through-holes on the axis of the air extraction rod (7) is equal to the distance between any two adjacent through-hole arrays.
4. A PE small-size mold internal exhaust and heat dissipation structure according to claim 3, characterized in that: There are three through hole arrays in total.
5. A PE small-size mold internal exhaust and heat dissipation structure according to claim 4, characterized in that: The aperture of the second through hole array is larger than the apertures of the other two through hole arrays.
6. A PE small-size mold internal exhaust and heat dissipation structure according to claim 1, characterized in that: The diameter of the air extraction rod (7) is the same everywhere.
7. The PE small-size mold internal exhaust and heat dissipation structure according to claim 1, characterized in that: The exhaust joint (8) is connected to the exhaust device via a high temperature resistant steel wire hose (9).
8. The PE small-size mold internal exhaust and heat dissipation structure according to claim 1, characterized in that: The exhaust joint (8) and the high temperature resistant steel wire hose (9) are connected via a quick joint (6).
9. The PE small-size mold internal exhaust and heat dissipation structure according to claim 1, characterized in that: The air extraction rod (7) is connected to the ventilation pipeline via threads.
10. A PE pipe forming die, characterized in that: It comprises the ventilation and heat dissipation structure as described in any one of claims 1-9.