CN219665090U - Die for extrusion casting of battery pack support - Google Patents
Die for extrusion casting of battery pack support Download PDFInfo
- Publication number
- CN219665090U CN219665090U CN202320444983.2U CN202320444983U CN219665090U CN 219665090 U CN219665090 U CN 219665090U CN 202320444983 U CN202320444983 U CN 202320444983U CN 219665090 U CN219665090 U CN 219665090U
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- Prior art keywords
- runner
- branch
- runners
- die
- battery pack
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- 238000005266 casting Methods 0.000 title claims abstract description 25
- 238000001125 extrusion Methods 0.000 title claims description 19
- 238000013461 design Methods 0.000 claims description 10
- 230000007704 transition Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 3
- 230000002950 deficient Effects 0.000 abstract description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- 238000004088 simulation Methods 0.000 description 6
- 238000012797 qualification Methods 0.000 description 5
- 238000009716 squeeze casting Methods 0.000 description 5
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The utility model discloses a die for extruding and casting a battery pack bracket, which comprises a fixed die frame, a fixed die core, a movable die core and a movable die frame which are sequentially arranged, wherein a runner and two die cavities are arranged between the fixed die core and the movable die core, the runner comprises a main runner, two branch runners and two inner pouring runners, the two branch runners are symmetrically arranged on two sides of the width direction of the main runner, the joint of the branch runner and the main runner is smoothly and naturally transited, the two inner pouring runners are correspondingly arranged on the tops of the two branch runners, the outer side surface of the width direction of the branch runner and the inner side surface of the width direction of the inner pouring runner are in an outwards convex R-angle structure, the main runner, the branch runners and the inner pouring runners are sequentially communicated to form a Y-shaped runner structure, the thickness of the main runner is larger than the thickness of the branch runners, the size of the inner pouring runner is slightly smaller than the size of the cross section of the branch runner, and the inner pouring runners of the two inner pouring runners are correspondingly communicated with the two die cavities one by one; the method has the advantages of effectively improving feeding capability, improving shrinkage cavity phenomenon and greatly reducing the defective rate of products.
Description
Technical Field
The utility model relates to the technical field of manufacturing molds of automobile parts, in particular to a mold for extrusion casting of a battery pack bracket.
Background
With the rapid development of economy, automobiles have played an increasingly important role as important vehicles in people's daily lives. Nowadays, with the strong support of the new energy automobile, especially the pure electric automobile, by the country and the gradual acceptance of the public to the new energy automobile, all cart enterprises are pushing out the pure electric automobile, and the pure electric automobile basically adopts a structure form that a whole battery pack is mounted on a chassis.
The battery pack bracket is a set of vibration-proof fittings on the pure electric automobile and is a connecting piece between the automobile main body and the battery pack. The existing battery pack support is thicker in overall wall thickness, the wall thickness is more than 20mm, the wall thickness distribution is L-shaped, the far end wall is thin, and the cavity is deep. The battery package support is formed by extrusion casting of a die in the production process, the runner of the die for extrusion casting the battery package support is of a T-shaped structure, as shown in fig. 1, the runner 100 comprises a main runner 101, a branch runner 102 and two inner gates 103, wherein the main runner 101, the branch runner 102 and the branch runner are sequentially communicated from bottom to top, the branch runner 102 is wider than the main runner 101, two ends of the branch runner 102 are communicated and symmetrically provided with cooling grooves 104, the two inner gates 103 are arranged on two sides of the top of the branch runner 102 and extend to the cooling grooves 104, the size of the main runner 101 is 54mm multiplied by 45mm, the draft angle is 15 degrees, and the average area of the cross section of the main runner 101 is about 2230mm 2 The dimensions of the in-gate 103 were 63mm by 8mm, the draft angle was 10℃and the cross-sectional area was about 500mm 2 . In the process of extrusion casting of the battery pack support by using the die, aluminum liquid enters a product die cavity through the runner 100, and the step formed between the branch runner 102 and the inner runner 103 causes unreasonable transformation proportion because the inner runner 103 is too wide and thin, so that the inner runner 103 and the product are solidified too quickly and cannot be fed for a long time, the solidification time of the inner runner is about 12 seconds, the solidification time of the product is about 18 seconds, a large number of shrinkage holes can appear in the product, and the reject ratio of the product is too high.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a die for extrusion casting of a battery pack bracket, which can effectively improve feeding capacity and shrinkage cavity phenomenon, so that the defective rate of products can be greatly reduced.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a mould for extrusion casting battery package support, includes fixed die frame, fixed die core, movable die core, the movable die frame that sets gradually, fixed die core with the movable die core between be provided with the runner and with two die cavities that the runner is linked together, its characterized in that: the runner include the sprue, two branch runners and two interior runners, two branch runners symmetry set up in the width direction both sides of sprue, every the width direction of branch runner the outside personally submits evagination R angle structure, every branch runner with the junction of sprue all smooth natural transition, two interior runners correspond and set up in two branch runner's top, every interior runner's width direction the inside personally submits evagination R angle structure, the sprue, interior runners communicate in proper order and form Y type runner structure, the thickness of sprue be greater than the thickness of branch runner, interior runner's size slightly less than the size of branch runner's cross section, two interior runner's interior runner and two die cavity one-to-one intercommunication.
Furthermore, the front end part of the main runner protruding out of the branch runner is conical with a small upper part and a large lower part, and the structure can increase energy and reduce the temperature loss of the aluminum liquid, so that the qualification rate of products is improved.
Further, the top of the part of the main runner protruding out of the rear end of the branch runner is lower than the top of the main part of the main runner, and the two tops are in transitional connection through an arc surface. The structure can increase energy and reduce the temperature loss of the aluminum liquid, thereby improving the qualification rate of the product; and the two tops are in transitional connection through the arc-shaped surface, so that the gas rolling is reduced.
Further, the inner pouring channel is provided with an inner pouring gateThe size is 34mm multiplied by 42mm, the area of the inner gate runner is 1280mm 2 The draft angle of the inner gate runner is 10 degrees, the inlet diameter of the main runner is 80mm, and the average area of the cross section of the main runner is 5195mm 2 . When the size of the inner gate is increased, the size of the main runner needs to be increased to ensure pressure conduction, the design of the extrusion casting mould requires that the average area of the cross section of the main runner is 2 times or more than the area of the inner gate, and the total area of the two inner gates is about 2560mm 2 The average area of the cross section of the main runner in the existing runner is 0.87 times of the total area of the two inner runners, and obviously does not meet the design requirement of the extrusion casting mold, so that the pressure conduction is insufficient, turbulent air entrainment can occur, and the defects of cold separation under-casting bubbles and the like of cast products are caused, so that the size of the main runner is increased, the average area of the cross section of the main runner after the increase is 2 times of the total area of the two inner runners, and the design requirement of the extrusion casting mold is met.
Further, the die cavity is used for extruding and casting the structural design of the battery pack bracket according to the requirement. In this structure, because the runner structure of mould is improved, consequently the die cavity is according to the structural design of the battery package support of required squeeze casting can, applicable battery package support of squeeze casting different structure.
Compared with the prior art, the utility model has the advantages that:
1) The two cooling grooves are removed, the outer side of the lateral flow channel in the width direction is of an outward convex R-angle structure, the junction of the lateral flow channel and the main flow channel is smooth and naturally transited, and the inner side of the inner flow channel in the width direction is of an outward convex R-angle structure, so that the process of aluminum liquid is smooth when the aluminum liquid passes through the flow channel, and the pressure of a punch head can be effectively transmitted to a product shrinkage cavity area through the flow channel when a product (a battery pack bracket) is cooled in a die.
2) The thickness of the main runner is greater than that of the branch runner, namely the main runner is thickened, the size of the inner pouring gate of the inner pouring runner is slightly smaller than that of the cross section of the branch runner, namely the inner pouring gate is thickened, so that the feeding capacity can be effectively improved, the shrinkage cavity phenomenon is improved, and the reject ratio of products can be greatly reduced.
3) The solidification time of the in-gate is prolonged to 23 seconds, which is longer than the solidification time of the casting by 18 seconds, thereby eliminating shrinkage cavities in the casting.
4) The mold can enable the qualification rate of products to reach more than 92% through improving the flow passage.
Drawings
FIG. 1 is a schematic diagram of a conventional flow channel simulation structure;
FIG. 2 is a schematic view of a part of the structure of the mold of the present utility model;
FIG. 3 is a side view of the side of FIG. 2;
FIG. 4 is a cross-sectional view taken along A-A of FIG. 3;
FIG. 5 is an enlarged schematic view of portion C of FIG. 4;
FIG. 6 is a B-B cross-sectional view of FIG. 3;
FIG. 7 is an enlarged schematic view of portion D of FIG. 6;
FIG. 8 is a schematic diagram of a flow channel simulation structure in a mold according to the present utility model;
FIG. 9 is a schematic diagram II of a flow channel simulation structure in a mold according to the present utility model;
FIG. 10 is a front view of a flow channel simulation structure in a mold of the present utility model;
FIG. 11 is a rear view of a flow channel simulation structure in a mold of the present utility model;
fig. 12 is a side view of a flow channel simulation structure in a mold of the present utility model.
Detailed Description
The utility model is described in further detail below with reference to the embodiments of the drawings.
Embodiment one: as shown in fig. 2 to 12, a die for extrusion casting a battery pack support comprises a fixed die frame 1, a fixed die core 2, a movable die core 3 and a movable die frame 4 which are sequentially arranged, a runner 5 and two die cavities (not shown in the drawings) which are communicated with the runner 5 are arranged between the fixed die core 2 and the movable die core 3, the runner 5 comprises a main runner 51, two side runners 52 and two inner pouring runners 53, the two side runners 52 are symmetrically arranged on two sides of the width direction of the main runner 51, the outer side of each side runner 52 in the width direction is in an outer convex R angle structure, the joint of each side runner 52 and the main runner 51 is smoothly and naturally transited, the two inner pouring runners 53 are correspondingly arranged on the top of the two side runners 52, the inner side of each inner pouring runner 53 in the width direction is in an outer convex R angle structure, the main runner 51, the side runners 52 and the inner pouring runners 53 are sequentially communicated to form a Y-shaped runner structure, the thickness of the inner pouring runner 531 is slightly smaller than the thickness of the side runner 52, the inner pouring runner 531 is slightly smaller than the size of the side runner 52, and the two inner pouring runners 53 are correspondingly communicated with the two die cavities 531.
Embodiment two: other structures are the same as in embodiment one, except that: the front end 511 of the main runner 51 protruding from the branch runner 52 is conical with small upper part and large lower part, so that the structure can increase energy and reduce the temperature loss of aluminum liquid, thereby improving the qualification rate of products; the top of the rear end part 512 of the main runner 51 protruding from the branch runner 52 is lower than the top of the main part 513 of the main runner 51, and the two tops are in transitional connection through 514, so that the structure can increase energy, reduce the temperature loss of aluminum liquid, and improve the qualification rate of products; and the two tops are in transitional connection through the arc-shaped surface 514, so that the air reeling is reduced.
In the above embodiments, the size of the in-gate 531 of the in-gate runner 53 is 34mm×42mm, and the area of the in-gate 531 of the in-gate runner 53 is 1280mm 2 The draft angle of the in-gate 531 of the in-gate runner 53 was 10 °, the inlet diameter of the main runner 51 was 80mm, and the average cross-sectional area of the main runner 51 was 5195mm 2 . When the size of the in-gate 531 is increased, the size of the main runner 51 needs to be increased to ensure pressure conduction, and the design of the squeeze casting mold requires that the average cross-sectional area of the main runner 51 should be 2 times or more the area of the in-gate 531, where the total area of the two in-gates 531 is about 2560mm 2 The average cross-sectional area of the main runner 51 in the existing runner is 0.87 times of the total area of the two inner runners 531, which obviously does not meet the design requirement of the extrusion casting mold, and this leads to insufficient pressure conduction, and simultaneously, turbulent air entrainment occurs, so that the cast product has defects such as cold-stop under-cast bubbles, etc., thus increasing the size of the main runner 51, and the average cross-sectional area of the main runner 51 after the increaseIs 2 times of the total area of the two inner gates 531, and meets the design requirement of an extrusion casting mould.
In the above embodiments, the mold cavity is designed according to the structure of the battery pack bracket which is extruded and cast according to the requirement. In this structure, because the runner structure of mould is improved, consequently the die cavity is according to the structural design of the battery package support of required squeeze casting can, applicable battery package support of squeeze casting different structure.
To verify the effectiveness of the inventive mold, a test was performed.
Two batches of battery pack brackets of the same type are respectively extruded and cast by using the existing die and the die. First batch (150): the number of shrinkage cavities of the battery pack bracket extruded and cast by the existing die is 23, the reject ratio of the product is 15%, while the number of shrinkage cavities of the battery pack bracket extruded and cast by the die is only 11, the number of shrinkage cavities is greatly reduced, the reject ratio of the product is 8%, and the reject ratio of the product is reduced. Second batch (150): the number of shrinkage cavities of the battery pack bracket extruded and cast by the existing die is 22, the reject ratio of the product is 15%, while the number of shrinkage cavities of the battery pack bracket extruded and cast by the die is only 12, the number of shrinkage cavities is greatly reduced, the reject ratio of the product is 8%, and the reject ratio of the product is reduced.
Claims (5)
1. The utility model provides a mould for extrusion casting battery package support, includes fixed die frame, fixed die core, movable die core, the movable die frame that sets gradually, fixed die core with the movable die core between be provided with the runner and with two die cavities that the runner is linked together, its characterized in that: the runner include the sprue, two branch runners and two interior runners, two branch runners symmetry set up in the width direction both sides of sprue, every the width direction of branch runner the outside personally submits evagination R angle structure, every branch runner with the junction of sprue all smooth natural transition, two interior runners correspond and set up in two branch runner's top, every interior runner's width direction the inside personally submits evagination R angle structure, the sprue, interior runners communicate in proper order and form Y type runner structure, the thickness of sprue be greater than the thickness of branch runner, interior runner's size slightly less than the size of branch runner's cross section, two interior runner's interior runner and two die cavity one-to-one intercommunication.
2. A die for extrusion casting of battery pack holders as defined in claim 1, wherein: the front end part of the main runner protruding out of the branch runner is conical with a small upper part and a large lower part.
3. A die for extrusion casting of battery pack holders as defined in claim 2, wherein: the top of the rear end part of the main runner protruding out of the branch runner is lower than the top of the main body part of the main runner, and the two tops are in transitional connection through an arc-shaped surface.
4. A die for extrusion casting of battery pack holders as defined in claim 1, wherein: the area of the inner pouring gate of the inner pouring runner is 1280mm 2 The draft angle of the inner pouring gate of the inner pouring runner is 10 degrees, and the average area of the cross section of the main runner is 5195mm 2 。
5. A die for extrusion casting of battery pack holders as defined in claim 1, wherein: the die cavity is used for extruding and casting the structural design of the battery pack bracket according to the requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320444983.2U CN219665090U (en) | 2023-03-10 | 2023-03-10 | Die for extrusion casting of battery pack support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320444983.2U CN219665090U (en) | 2023-03-10 | 2023-03-10 | Die for extrusion casting of battery pack support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219665090U true CN219665090U (en) | 2023-09-12 |
Family
ID=87920572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320444983.2U Active CN219665090U (en) | 2023-03-10 | 2023-03-10 | Die for extrusion casting of battery pack support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219665090U (en) |
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2023
- 2023-03-10 CN CN202320444983.2U patent/CN219665090U/en active Active
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| GR01 | Patent grant | ||
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