Automobile PTC aluminum shell die-casting filling structure capable of reducing cold shut
By designing multiple sets of isolated islands and vertical rib waterway guide structures in the die-cast structure of the automotive PTC aluminum shell, the problem of air trapped in the isolated islands was solved, the heating efficiency and forming accuracy were improved, and the production cost was reduced.
Patent Information
- Application Number
- CN202422857292.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-11-22
AI Technical Summary
Existing automotive PTC aluminum housings are prone to island gas entrapment during the die-casting process, resulting in low production efficiency and increased costs.
A die-cast filling structure consisting of multiple groups of islands and vertical ribs is designed. The raised island components form water channel guides, and vertical ribs are added to prevent the aluminum liquid from rolling back, thereby improving the aluminum liquid filling process.
It improves heating efficiency and product molding accuracy, reduces production costs, solves the problem of gas trapped in isolated islands, and improves production efficiency.
Smart Images
Figure CN223476280U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of PTC aluminum shell technology, and more specifically, it relates to a die-cast filling structure for automotive PTC aluminum shells that can reduce cold shuts. Background Technology
[0002] PTC aluminum shell products have high requirements for airtightness and have a complex structure with many independent cavities with large differences in surface height. During the filling process of die-cast aluminum liquid, the feeding of independent cavities is not smooth, which can easily lead to air entrapment in isolated islands.
[0003] Currently, the main approach to reducing air entrapment during molten metal filling is by optimizing the gating system structure. For example, the design of the ingate can be adjusted to ensure smooth molten metal filling and reduce eddies and air entrapment. Alternatively, for castings already experiencing trapped air, post-processing methods such as vacuum treatment or heat treatment can be used to reduce the gas content inside the casting. However, improving the gating system increases design and mold-making costs, and post-processing requires increased production time, reducing production efficiency and ultimately raising production costs.
[0004] Therefore, a die-cast filling structure for automotive PTC aluminum shells is proposed to reduce cold shuts, solve the problem of trapped air in isolated areas, improve production efficiency, and reduce production costs. Utility Model Content
[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a die-cast filling structure for automotive PTC aluminum shells that can reduce cold shuts, thereby solving the problem of air trapped in isolated areas, improving production efficiency, and reducing production costs.
[0006] To achieve the above objectives, the present invention provides the following technical solution:
[0007] A die-cast filling structure for automotive PTC aluminum shells that reduces cold shuts includes a chassis. A fixed outer shell is provided on one side of the chassis. An island assembly is provided at the top of the fixed outer shell. A water channel is opened at the top of the fixed outer shell, and a flow guide is provided along the central axis of the top of the fixed outer shell. The island assembly includes two sets of first islands, and two sets of second island portions are provided between the two sets of first islands. The second island portion includes an island block, and vertical ribs are provided on both sides of the island block. The vertical ribs are configured as semi-cylindrical structures.
[0008] The present invention is further configured such that: two sets of the first islands are symmetrically arranged along the flow direction guiding axis, and two sets of the second islands are symmetrically arranged along the flow direction guiding axis.
[0009] The present invention is further configured such that: two sets of third islands are provided between the two sets of second islands, and the two sets of third islands are symmetrically arranged along the flow direction guide axis.
[0010] The present invention is further configured such that: the bottom end of the fixed outer shell is provided with an installation groove, the first island, the second island and the third island have the same length, and the first island, the second island and the third island are arranged alternately.
[0011] The present invention is further configured such that: the bottom ends of the first island, the second island and the third island are provided with plug-in slots, and the plug-in slots are adapted to the shapes of the first island, the second island and the third island.
[0012] By adopting the above technical solution, when the product is in use, the raised first island, second island and third island work together to form a recessed water channel, which provides water flow guidance for the PTC element's heating operation, improving heating efficiency. The mounting slot and plug-in slot provide an installation environment for the PTC element, making it easy to install the PTC element into the product.
[0013] The present invention is further configured such that: the height of the vertical rib is consistent with that of the island block, and the top and bottom ends of the vertical rib are respectively provided with rib guide blocks.
[0014] By adopting the above technical solution, when the molten aluminum flows into the island block during die casting, the molten aluminum at the end of the filling will roll back because the mold temperature is lower at the side wall of the island block. The cold material cannot be discharged, which easily causes cold shuts, affecting the shape of the product and potentially leading to product defects. The cold shut problem can be solved by adding small vertical ribs at the filling island block position. This allows the molten aluminum to advance in waves and melt the cold material during filling, avoiding local accumulation of cold material and causing cold shuts, improving the product forming accuracy, and solving the problem of trapped air.
[0015] In summary, this application includes at least one of the following beneficial technical effects:
[0016] 1. When the product is in use, the raised first island, second island and third island work together to form a recessed water channel, which provides water flow guidance for the PTC element to heat up, thus improving heating efficiency. The mounting slot and plug-in slot provide an installation environment for the PTC element, making it easy to install the PTC element into the product.
[0017] 2. When die-casting the product, as the molten aluminum flows into the island block, the molten aluminum at the end of the filling process will roll back due to the lower temperature of the mold that matches the island block. The cold material cannot be discharged, which can easily cause cold shuts, affecting the shape of the product and potentially leading to product defects. The cold shut problem can be solved by adding vertical ribs. By adding small vertical ribs at the filling island block position, the molten aluminum will advance in waves to melt the cold material during filling, avoiding local accumulation of cold material and causing cold shuts, improving the product forming accuracy, and solving the problem of trapped air. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the automotive PTC aluminum shell die-casting filling structure that can reduce cold shut according to this utility model.
[0019] Figure 2 This is a top view of the present invention.
[0020] Figure 3 This is a structural schematic diagram from another perspective of the present invention.
[0021] Figure 4 This is a structural schematic diagram from another perspective of the present invention.
[0022] Attached image labeling: 1. Chassis;
[0023] 2. Secure the outer casing;
[0024] 3. Island component; 31. First island; 32. Second island section; 321. Island block; 322. Vertical rib; 323. Rib guide block; 33. Third island; 34. Mounting slot; 35. Plug-in slot;
[0025] 4. Waterway;
[0026] 5. Flow guidance. Detailed Implementation
[0027] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.
[0029] Example 1, please refer to Figure 1-4 The present invention provides the following technical solution:
[0030] Specifically, it refers to a die-cast filling structure for automotive PTC aluminum housings that can reduce cold shuts; see [link / reference]. Figure 1-3 The system includes a chassis 1, which provides support for the entire product. A fixed housing 2 is provided on one side of the chassis 1, which provides support for other components or structures and supports the installation of PTC elements. An island assembly 3 is provided at the top of the fixed housing 2, which provides a heating environment for the PTC elements. During die casting, the structure on the island assembly 3 reduces the generation of cold shuts. A water channel 4 is provided at the top of the fixed housing 2, which provides a flow environment for the coolant used for heating. A flow guide 5 is provided on the central axis of the top of the fixed housing 2, which assists the water channel 4 in providing a flow environment for the coolant used for heating.
[0031] See Figure 2-4 The island component 3 includes two sets of first islands 31, with two sets of second island sections 32 disposed between them. The two sets of first islands 31 are symmetrically arranged along the central axis of the flow guide 5, and the two sets of second island sections 32 are also symmetrically arranged along the central axis of the flow guide 5. Two sets of third islands 33 are disposed between the two sets of second island sections 32, and the two sets of third islands 33 are symmetrically arranged along the central axis of the flow guide 5. The bottom of the fixed housing 2 has a mounting groove 34. The first islands 31, second island sections 32, and third islands 33 are of equal length and are staggered. The bottom of the first islands 31, second island sections 32, and third islands 33 has insertion grooves 35, which are adapted to the shape of the first islands 31, second island sections 32, and third islands 33.
[0032] Specifically, when the product is in use, the raised first island 31, the second island 32, and the third island 33 work together to form a recessed water channel 4, which provides water flow guidance for the PTC element's heating operation, improving heating efficiency. The mounting slot 34 and the insertion slot 35 provide an installation environment for the PTC element, making it easy for the PTC element to be installed into the product.
[0033] See Figure 3 The second island section 32 includes an island block 321, with vertical ribs 322 on both sides of the island block 321. The vertical ribs 322 are semi-cylindrical structures. Insertion slots 35 are provided at the bottom of the first island 31, the second island section 32, and the third island 33, and the insertion slots 35 are adapted to the shapes of the first island 31, the second island section 32, and the third island 33. The height of the vertical ribs 322 is the same as that of the island block 321, and rib guide blocks 323 are provided at the top and bottom of the vertical ribs 322.
[0034] Specifically, during die casting, when molten aluminum flows into the island block 321, the molten aluminum at the end of the filling process will roll back due to the lower temperature of the mold that is compatible with the island block 321. The cold material cannot be discharged, which can easily cause cold shuts, affecting the shape of the product and potentially leading to product defects. The cold shut problem can be solved by adding small vertical ribs 322 at the filling position of the island block 321. This allows the molten aluminum to advance in waves and melt the cold material during filling, preventing the local accumulation of cold material and thus avoiding cold shuts. This improves the forming accuracy of the product and solves the problem of trapped air.
[0035] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.
Claims
1. A die-cast filling structure for automotive PTC aluminum housings that reduces cold shuts, characterized in that: Includes a chassis (1), a fixed outer shell (2) is provided on one side of the chassis (1), an island component (3) is provided on the top of the fixed outer shell (2), a water channel (4) is provided on the top of the fixed outer shell (2), and a flow guide (5) is provided on the central axis of the top of the fixed outer shell (2); The island component (3) includes two sets of first islands (31), and two sets of second island sections (32) are provided between the two sets of first islands (31); The second island section (32) includes an island block (321), and vertical ribs (322) are provided on both sides of the island block (321). The vertical ribs (322) are configured as semi-cylindrical structures.
2. The automotive PTC aluminum housing die-casting filling structure for reducing cold shuts according to claim 1, characterized in that: The two sets of first islands (31) are symmetrically arranged along the central axis of the flow direction guide (5), and the two sets of second islands (32) are symmetrically arranged along the central axis of the flow direction guide (5).
3. The automotive PTC aluminum housing die-casting filling structure for reducing cold shuts according to claim 2, characterized in that: Two sets of third islands (33) are provided between the two sets of second island sections (32), and the two sets of third islands (33) are symmetrically arranged along the central axis of the flow guide (5).
4. The automotive PTC aluminum housing die-casting filling structure for reducing cold shuts according to claim 3, characterized in that: The fixed outer shell (2) has an installation groove (34) at its bottom end. The first island (31), the second island (32), and the third island (33) have the same length and are arranged alternately.
5. The automotive PTC aluminum housing die-casting filling structure for reducing cold shuts according to claim 4, characterized in that: The bottom of the first island (31), the second island (32), and the third island (33) are provided with insertion slots (35), and the insertion slots (35) are adapted to the shape of the first island (31), the second island (32), and the third island (33).
6. The automotive PTC aluminum housing die-casting filling structure for reducing cold shuts according to claim 1, characterized in that: The height of the vertical rib (322) is the same as that of the island block (321), and the top and bottom ends of the vertical rib (322) are respectively provided with rib head guide blocks (323).