Die cooling pipeline structure

Abstract

The utility model discloses a mold cooling pipeline structure which is characterized in that a first pipeline assembly and a second pipeline assembly are respectively arranged in an upper mold assembly and a lower mold assembly and are positioned above and below a forming cavity, the middle part and the peripheral side of the forming cavity have height difference, and a first outer pipeline and a first inner pipeline have height difference; the first inner pipelines and the first outer pipelines are annularly arranged above the forming cavity, the first pipeline assembly comprises a plurality of sets of first inlets and first outlets, the first inner pipelines and the first outer pipelines communicate with the first inlets and the first outlets correspondingly, and height difference exists between the second outer pipelines and the second inner pipelines. The second inner pipelines and the second outer pipelines are annularly arranged below the forming cavity, the second pipeline assembly comprises a plurality of sets of second inlets and second outlets, and the second inner pipelines and the second outer pipelines communicate with the second inlets and the second outlets correspondingly. According to the mold cooling pipeline structure, the distance between the mold cooling pipeline structure and the forming cavity can be kept consistent, uniform covering is kept in the radial direction, and the cooling uniformity is improved.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a mold cooling pipe structure. Background Technology

[0002] Cooling of molded products is a crucial step in the plastic molding process. Its purpose is to control the cooling rate and uniformity to ensure good dimensional stability, surface quality, and mechanical properties after demolding, while simultaneously improving production efficiency and reducing costs. Common cooling methods include water cooling and air cooling. Water cooling involves setting up cooling channels within the mold to remove heat using cooling water. Existing cooling pipe arrangements typically involve horizontally or vertically crisscrossing pipes around the molding cavity for coolant flow; for example, patent CN220464651U discloses a similar cooling structure. However, for round products or products with a certain height difference, the above arrangement can easily lead to uneven radial cooling. Uneven cooling can cause residual thermal stress, affecting the dimensional accuracy and surface quality of the product. For example, uneven cooling may cause product warping. Utility Model Content

[0003] The purpose of this invention is to solve the technical problem of uneven cooling in existing cooling pipe systems.

[0004] To achieve the objectives of this utility model, the following technical solution is adopted:

[0005] A mold cooling pipe structure includes a first pipe assembly and a second pipe assembly. The first and second pipe assemblies are respectively disposed in an upper mold assembly and a lower mold assembly, and are located above and below a molding cavity. The molding cavity has a height difference between its center and its periphery. The first pipe assembly includes a first inner pipe and a first outer pipe located outside the first inner pipe. The first outer pipe and the first inner pipe have a height difference. A plurality of first inner pipes and first outer pipes are arranged in a ring above the molding cavity. The first pipe assembly includes a plurality of first inlets and first outlets. The first inner pipes and the first outer pipes are respectively connected to the first inlets and the first outlets. The second pipe assembly includes a second inner pipe and a second outer pipe disposed outside the second inner pipe. The second outer pipe and the second inner pipe have a height difference. A plurality of second inner pipes and second outer pipes are arranged in a ring below the molding cavity. The second pipe assembly includes a plurality of second inlets and second outlets. The second inner pipes and the second outer pipes are respectively connected to the second inlets and the second outlets.

[0006] In some embodiments, the first inlet and the first outlet are disposed on the side of the upper mold assembly, and the second inlet and the second outlet are disposed on the side of the lower mold assembly.

[0007] In some embodiments, the upper mold assembly includes an upper top plate, an upper connecting plate, and an upper insert. The upper connecting plate is disposed between the upper top plate and the upper insert. The upper top plate has a feeding channel that passes through the upper connecting plate and the upper insert and communicates with the molding cavity. The lower mold assembly includes a lower bottom plate, a lower connecting plate, and a lower insert. The lower connecting plate is disposed between the lower insert and the lower bottom plate. The molding cavity is located between the upper insert and the lower insert.

[0008] In some embodiments, the first inner pipe and the first outer pipe are disposed on the upper surface of the upper insert and are closed by the upper connecting plate, the second inner pipe is disposed on the upper surface of the lower insert and is closed by the lower bottom plate, and the second outer pipe is located between the lower connecting plate and the lower bottom plate.

[0009] In some embodiments, the first inlet and the first outlet are respectively connected to the first inner pipeline and the second outer pipeline through the first connecting channel, and the second inlet and the second outlet are respectively connected to the second inner pipeline and the second outer pipeline through the second connecting channel.

[0010] In some embodiments, the first connection channel and the second connection channel are arranged radially.

[0011] In some embodiments, the top of the second external conduit has an extension that extends toward the top of the molding cavity.

[0012] In some embodiments, the cross-sections of the first inner pipe, the first outer pipe, and the second inner pipe are rectangular.

[0013] In some embodiments, the outer side of the molding cavity has a protrusion, the first outer pipe and the second outer pipe are located above and below the protrusion, respectively, the position of the first outer pipe is higher than the first inner pipe, and the position of the second outer pipe is higher than the second inner pipe.

[0014] In some embodiments, the lower mold assembly includes a lower base plate and a lower insert, wherein the second external conduit is disposed on the surface of the lower base plate and is closed by the lower insert.

[0015] The mold cooling pipe structure provided by this utility model has the following advantages:

[0016] This utility model adopts first and second pipeline components distributed at the top and bottom. Each pipeline component is arranged in a ring through inner and outer pipelines, which can keep the distance between it and the molding cavity consistent and maintain uniform coverage in the radial direction, thereby improving cooling uniformity. In addition, it can facilitate pipeline processing and reduce pipeline processing costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a mold cooling pipe structure provided in Embodiment 1 of this utility model.

[0019] Figure 2 This is a cross-sectional view of the upper mold assembly provided in Embodiment 1 of this utility model.

[0020] Figure 3 This is a schematic diagram of the first pipeline assembly provided in Embodiment 1 of this utility model.

[0021] Figure 4 This is a schematic diagram of the second pipeline assembly provided in Embodiment 1 of this utility model.

[0022] Figure 5 This is a schematic diagram of the second external pipeline provided in Embodiment 1 of this utility model.

[0023] Figure 6 This is a schematic diagram of the second external pipeline provided in Embodiment 2 of this utility model.

[0024] In the attached image:

[0025] 1. First piping assembly; 2. Second piping assembly; 3. Upper mold assembly; 4. Lower mold assembly; 5. Molding cavity; 11. First inner piping; 12. First outer piping; 13. First inlet; 14. First outlet; 21. Second inner piping; 22. Second outer piping; 23. Second inlet; 24. Second outlet; 31. Upper top plate; 32. Upper connecting plate; 33. Upper insert; 34. Feed channel; 41. Lower bottom plate; 42. Lower connecting plate; 43. Lower insert; 52. Protrusion; 61. First connecting channel; 62. Second connecting channel; 71. First locking element; 72. Second locking element; 221. Extension. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0027] <Example 1>

[0028] like Figures 1 to 5As shown, this embodiment of a mold cooling pipe structure includes a first pipe assembly 1 and a second pipe assembly 2. The first and second pipe assemblies are respectively disposed in the upper mold assembly 3 and the lower mold assembly 4, and are located above and below the molding cavity 5. The molding cavity 5 is used to mold products. Molten material is injected into the molding cavity and cooled to form the product. In this embodiment, the molding cavity is circular, and circular products can be formed. The molding cavity 5 has a height difference between the center and the periphery, that is, the molding cavity 5 has a height change from the center to both sides. The first piping assembly 1 includes a first inner piping 11 and a first outer piping 12 located outside the first inner piping 11. Coolant can flow in the first inner piping 11 and the first outer piping 12. The first outer piping 12 and the first inner piping 11 have a height difference, that is, the first outer piping 12 and the first inner piping 11 are not on the same plane, so that the distance between the first inner piping 11 and the first outer piping 12 and the molding cavity is kept the same. When the distance cannot be kept exactly the same due to structural limitations, the distance difference between the first inner piping 11 and the first outer piping 12 and the molding cavity is minimized to be approximately the same, so that the molded product can obtain a more uniform cooling effect.

[0029] Several first inner pipes 11 and first outer pipes 12 are arranged in a ring above the molding cavity 5, thereby providing better pipe coverage in the radial direction of the molded product. The first pipe assembly 1 includes several sets of first inlets 13 and first outlets 14. The first inner pipes 11 and first outer pipes 12 are respectively connected to the first inlets 13 and first outlets 14. In this embodiment, first inlets 13a, 13b, and 13c are provided, and corresponding first outlets 14a, 14b, and 14c are provided. The three first inlets 13 are located in different orientations. Coolant enters from the first inlet 13a, passes through the first inner pipes 11 and / or the first outer pipes 12, and exits from the first outlet 13a. Similarly, the first inlets 13b and first outlets 14b, and the first inlets 13c and first outlets 14c, can all form coolant circulation. Each first inner pipe or first outer pipe can be individually connected to a set of first inlets and first outlets, or adjacent first inner pipes or first outer pipes can be connected in series to share a set of first inlets and first outlets, depending on whether the overall mold structure can provide a sufficient number of first inlets and first outlets. By using multiple first inlets and first outlets, the circulation path of the coolant can be shortened, avoiding reduced cooling effect and affecting cooling uniformity due to excessively long cooling channels. The second pipe assembly 2 includes a second inner pipe 21 and a second outer pipe 22 disposed outside the second inner pipe 21. The second outer pipe 22 and the second inner pipe 21 have a height difference. Multiple second inner pipes 21 and second outer pipes 22 are arranged in a ring below the molding cavity 5. The second pipe assembly 2 includes multiple sets of second inlets 23 and second outlets 24, with the second inner pipes 21 and second outer pipes 22 respectively connected to the second inlets 23 and second outlets 24. This embodiment has second inlets 23a, 23b, and 23c, and corresponding second outlets 24a, 24b, and 24c, arranged in the same manner as the first piping assembly. Coolant enters through the second inlets and flows out through the second outlets via the annular second inner pipe and / or the second outer pipe. In the above technical solution, the first and second piping assemblies arranged above and below the molding cavity enable the product to be cooled simultaneously in both the upward and downward directions. Furthermore, the annular arrangement of the first and second inner pipes and the first and second outer pipes in the radial direction ensures more uniform radial cooling and improves the cooling effect.

[0030] Furthermore, the first inlet 13 and the first outlet 14 are located on the side of the upper mold assembly 3, and the second inlet 23 and the second outlet 24 are located on the side of the lower mold assembly 4, thereby allowing coolant input and output from the side. The inlets and outlets are connected to the inner and outer pipes through several connecting channels. Specifically, the first inlet 13 and the first outlet 14 are connected to the first inner pipe 11 and the first outer pipe 12 respectively through the first connecting channel 61, and the second inlet 21 and the second outlet 22 are connected to the second inner pipe 11 and the second outer pipe 12 respectively through the second connecting channel 62, so that coolant can enter and exit the inner and outer pipes through the connecting channels. The first connecting channel 61 and the second connecting channel 62 are arranged radially, that is, in a radial pattern. The first and second connecting channels are L-shaped, which reduces the length of the connecting channel 6 and the flow path length of the coolant. The upper mold assembly 3 includes an upper top plate 31, an upper connecting plate 32, and an upper insert 33. The upper connecting plate 32 is disposed between the upper top plate 31 and the upper insert 33. The upper connecting plate 32 is locked to the upper top plate 31 by a first locking member 71, and the upper connecting plate 32 is locked to the upper insert 33 by a second locking member 72, facilitating the assembly and disassembly of the components. The upper connecting plate 32 is U-shaped, limiting the upper insert 33 from above and both sides, thus supporting the pressure on the upper insert 33 during molding. In addition, a first inlet 13, a first outlet 14, and a connecting channel 6 are disposed on the upper connecting plate 32, facilitating communication with the first inner pipe and the first outer pipe on the upper insert 33. The upper top plate 31 is provided with a feeding channel 34, which passes through the upper connecting plate 32 and the upper insert 33 and communicates with the molding cavity 5. The feeding channel 34 is vertically arranged, allowing the material to directly enter the molding cavity 5, reducing the pressure on the upper mold assembly 3. The lower mold assembly 4 includes a lower base plate 41, a lower connecting plate 42, and a lower insert 43. The lower connecting plate 42 is disposed between the lower insert 43 and the lower base plate 41. The molding cavity 5 is located between the upper insert 33 and the lower insert 43. The second connecting channel 62 passes through the lower base plate 41 and communicates with the second inner pipe of the lower insert 43.

[0031] Furthermore, the first inner pipe 11 and the first outer pipe 12 are disposed on the upper surface of the upper insert 33 and are closed by the upper connecting plate 32. Compared with drilling holes in the component to create channels, this method facilitates the processing of the first inner pipe 11 and the first outer pipe 12. The second inner pipe 11 is disposed on the upper surface of the lower insert 43 and is closed by the lower bottom plate 41. The second outer pipe 22 is located between the lower connecting plate 42 and the lower bottom plate 41. The second outer pipe 22 is formed by assembling two components, making full use of the structural space, so that the second outer pipe 22 can be closer to the molding cavity 5.

[0032] Furthermore, the top of the second outer pipe 22 has an extension 221 that extends towards the top of the molding cavity 5, allowing the second outer pipe 22 to be closer to the top and maintain a more balanced cooling effect with other parts. The cross-sections of the first inner pipe 11, the first outer pipe 12, and the second inner pipe 21 are rectangular. Due to the grooves formed on the surface of the pipes, the size of each pipe can be increased, increasing the flow cross-sectional area of ​​the coolant and improving the cooling effect. The outer side of the molding cavity 5 has a protrusion 52, i.e., the top of the molding cavity. The first outer pipe 12 and the second outer pipe 22 are located above and below the protrusion 52, respectively. The position of the first outer pipe 12 is higher than that of the first inner pipe 11, and the position of the second outer pipe 22 is higher than that of the second inner pipe 21. The middle of the molding cavity 5 is flat, and there are protrusions 52 on both sides. The molded product is a plastic cap. Through the above technical solution, a uniform cooling effect can be achieved on both sides of the molding cavity.

[0033] <Example 2>

[0034] In this embodiment, the parts that are the same as in Embodiment 1 are given the same reference numerals, and the same text descriptions are omitted.

[0035] like Figure 6 As shown, compared to Embodiment 1, the mold cooling pipe structure provided in this embodiment has the following structural design differences:

[0036] The main difference between the mold cooling pipe structure in this embodiment and that in Embodiment 1 lies in the lower mold assembly 4. In this embodiment, the lower mold assembly 4 includes a lower base plate 41 and a lower insert 43. The second external pipe 22 is disposed on the surface of the lower base plate 41 and enclosed by the lower insert 43. In this embodiment, the second external pipe 22 is formed by slotting the surface of the lower base plate 41, requiring only slotting in the lower base plate 41, thus simplifying processing. Those skilled in the art will understand that the structure and form of the second external pipe 22 can be different, but they do not depart from the concept of the embodiments of this application.

[0037] In this embodiment, the distance between the cooling pipe and the molding cavity is kept consistent to ensure a uniform mold surface temperature and avoid local overheating or undercooling.

[0038] In the above embodiments one and two, during the working process, depending on the different working environments, some of the technical implementation methods of embodiments one and two can be combined or replaced.

[0039] The technical principles of this utility model have been described above in conjunction with specific embodiments. However, it should be noted that these descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, other specific embodiments or equivalent substitutions of this utility model that can be conceived by those skilled in the art without creative effort will all fall within the scope of protection of this utility model.

Claims

1. A mold cooling pipe structure, characterized in that, The system includes a first piping assembly and a second piping assembly. The first and second piping assemblies are respectively disposed in an upper mold assembly and a lower mold assembly, and are located above and below a molding cavity. The molding cavity has a height difference between its center and periphery. The first piping assembly includes a first inner pipe and a first outer pipe located outside the first inner pipe. The first outer pipe and the first inner pipe have a height difference. A plurality of first inner pipes and first outer pipes are arranged in a ring above the molding cavity. The first piping assembly includes a plurality of first inlets and first outlets. The first inner pipes and the first outer pipes are respectively connected to the first inlets and the first outlets. The second piping assembly includes a second inner pipe and a second outer pipe disposed outside the second inner pipe. The second outer pipe and the second inner pipe have a height difference. A plurality of second inner pipes and second outer pipes are arranged in a ring below the molding cavity. The second piping assembly includes a plurality of second inlets and second outlets. The second inner pipes and the second outer pipes are respectively connected to the second inlets and the second outlets.

2. The mold cooling pipe structure according to claim 1, characterized in that, The first inlet and the first outlet are located on the side of the upper mold assembly, and the second inlet and the second outlet are located on the side of the lower mold assembly.

3. The mold cooling pipe structure according to claim 2, characterized in that, The upper mold assembly includes an upper top plate, an upper connecting plate, and an upper insert. The upper connecting plate is disposed between the upper top plate and the upper insert. The upper top plate has a feeding channel that passes through the upper connecting plate and the upper insert and communicates with the molding cavity. The lower mold assembly includes a lower bottom plate, a lower connecting plate, and a lower insert. The lower connecting plate is disposed between the lower insert and the lower bottom plate. The molding cavity is located between the upper insert and the lower insert.

4. The mold cooling pipe structure according to claim 3, characterized in that, The first inner pipe and the first outer pipe are disposed on the upper surface of the upper insert and are closed by the upper connecting plate. The second inner pipe is disposed on the upper surface of the lower insert and is closed by the lower bottom plate. The second outer pipe is located between the lower connecting plate and the lower bottom plate.

5. The mold cooling pipe structure according to claim 4, characterized in that, The first inlet and the first outlet are respectively connected to the first inner pipeline and the second outer pipeline through the first connecting channel, and the second inlet and the second outlet are respectively connected to the second inner pipeline and the second outer pipeline through the second connecting channel.

6. The mold cooling pipe structure according to claim 5, characterized in that, The first and second connecting channels are arranged radially.

7. The mold cooling pipe structure according to claim 6, characterized in that, The top of the second external conduit has an extension that extends toward the top of the molding cavity.

8. The mold cooling pipe structure according to claim 1, characterized in that, The cross-sections of the first inner pipe, the first outer pipe, and the second inner pipe are rectangular.

9. The mold cooling pipe structure according to claim 1, characterized in that, The outer side of the molding cavity has a protrusion. The first outer pipe and the second outer pipe are located above and below the protrusion, respectively. The position of the first outer pipe is higher than that of the first inner pipe, and the position of the second outer pipe is higher than that of the second inner pipe.

10. The mold cooling pipe structure according to claim 1, characterized in that, The lower mold assembly includes a lower base plate and a lower insert, and the second external pipeline is disposed on the surface of the lower base plate and is closed by the lower insert.

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