Automobile caliper casting mold capable of reducing casting shrinkage cavities
By setting up casting cavities and optimizing the gating system in automotive caliper casting molds, combined with chills and filters, and adopting bottom-pouring and sequential solidification principles, the problem of shrinkage cavities in castings was solved, the mechanical properties and appearance quality of castings were improved, and the scrap rate was reduced.
Patent Information
- Application Number
- CN202423006257.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-06
AI Technical Summary
Existing automotive caliper casting molds are prone to shrinkage cavities in thick-walled and hot-spot areas, resulting in decreased mechanical properties, poor appearance quality, low yield, and potential oil leakage.
The casting cavity and optimized gating system, including horizontal runners, vertical runners and risers, are set on the mold base plate. Combined with chills and filters, the bottom pouring and sequential solidification principles are adopted to control the solidification rate and cooling method, and optimize the distribution and solidification process of the molten metal.
It effectively reduces shrinkage cavities in castings, improves the mechanical properties and appearance quality of castings, increases product yield, and reduces scrap rate and production costs.
Smart Images
Figure CN223629468U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the field of automobile brake system spare part casting technology, specifically discloses an automobile caliper casting mould capable of reducing casting shrinkage hole. BACKGROUND
[0002] The brake caliper (i.e. caliper) is one of main parts on the automobile hydraulic disc brake, and is used in cooperation with the brake piston, brake disc, friction plate, brake support and the like after processing, and it is the part with the most concentrated stress and the most frequent variable load pressure in the automobile, and is directly related to the safety performance of the automobile, so that the design standard thereof is very strict.
[0003] At present, the riser is arranged at the thick wall part and the hot spot part (i.e. the part with the concentrated heat and the larger inner tangent circle diameter) of the casting, which is an effective measure for preventing shrinkage hole and shrinkage. The caliper body arc back of some specifications is thick, and the tendency of shrinkage caused by the smelting composition not in place is large, the caliper body arc back cylinder head needs a large riser to form a feeding channel, the large riser leads to low process yield, and the produced caliper body is prone to produce micro shrinkage. As known to all, the shrinkage hole is a common surface confirmation in casting, which not only affects the mechanical properties and the compactness of the casting, but also affects the appearance quality of the casting, and even directly leads to the hidden trouble of oil hole leakage after the casting is machined, increases the waste rate and production cost. SUMMARY
[0004] In order to solve the problems in the background art, the utility model discloses an automobile caliper casting mould capable of reducing casting shrinkage hole, effectively reduces the generation of the casting shrinkage hole, improves the mechanical properties and appearance quality of the casting, and improves the product yield.
[0005] In order to achieve the above-mentioned purposes, the utility model adopts the following technical scheme:
[0006] The application discloses a casting mold for automobile caliper capable of reducing shrinkage cavity, which is characterized by comprising a casting cavity and a gating system arranged on a mold bottom plate, wherein the gating system comprises a cross runner and interval arranged vertical runners A, B and C; the cross runner is in a trapezoidal structure, the middle part of the lower bottom of the cross runner is communicated with the bottom of a sprue cup, the middle part of the upper bottom of the cross runner is communicated with the upper end of the vertical runner B, the left end of the lower bottom of the cross runner is connected with the upper end of the vertical runner A, and the right end of the lower bottom of the cross runner is connected with the upper end of the vertical runner C; two casting cavities are arranged above and below the adjacent vertical runners respectively, chills are arranged at the positions of thick parts adjacent to the casting cavities, bottom runners are horizontally arranged below the casting cavities, one end of the bottom runner is communicated with the vertical runner B, the other end of the bottom runner is communicated with the vertical runner A or the vertical runner B, bottom sprues are arranged at the bottoms of the casting cavities and communicated with the corresponding bottom runners, and risers are arranged at the left and right sides of the casting cavities and communicated with the corresponding casting cavities through inner sprues at the inner sides of the bottom of the risers and communicated with the end parts of the corresponding bottom runners at the outer sides of the bottom of the risers.
[0007] Further, the application discloses the casting mold for automobile caliper capable of reducing shrinkage cavity, wherein filters are arranged at the two ends of the bottom runner.
[0008] Further, the application discloses the casting mold for automobile caliper capable of reducing shrinkage cavity, wherein the vertical runners A, B and C are in a semi-cylindrical structure, and the radii of the vertical runners A, B and C gradually decrease from top to bottom.
[0009] Further, the application discloses the casting mold for automobile caliper capable of reducing shrinkage cavity, wherein the sectional area ratio of the inner sprue, the cross runner and the vertical runner is 1:1.2:1.5.
[0010] Further, the application discloses the casting mold for automobile caliper capable of reducing shrinkage cavity, wherein reinforcing ribs are arranged at the weak positions of the casting cavities.
[0011] Compared with the prior art, the application has the advantages that:
[0012] The utility model discloses a car caliper casting mould capable of reducing casting shrinkage hole, is provided with casting cavity and pouring system on the mould bottom plate, the pouring system includes transverse gate and interval setting vertical runner A, vertical runner B and vertical runner C, and the transverse gate is trapezoidal structure, is provided with two casting cavities of upper and lower respectively between the adjacent vertical runner, is provided with cold iron respectively at the position of thick part adjacent to the casting cavity, is equipped with the bottom gate of horizontal arrangement respectively below the casting cavity, is equipped with a plurality of bottom runner of bottom gate communication respectively at the bottom of casting cavity, is provided with the riser respectively on the left and right sides of casting cavity, and the riser bottom inboard communicates with the corresponding casting cavity through the inner gate, and the riser bottom outboard communicates with the end of corresponding bottom gate, through optimizing pouring system and casting structure, control solidification speed and process, effectively reduce the shrinkage defect of casting, improve the mechanical properties and appearance quality of casting, improve product yield. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is the front view structural schematic diagram of the utility model casting mould;
[0014] The above-mentioned chart: 1 - sprue cup;2 - transverse gate;3 - vertical runner A;4 - vertical runner B;5 - vertical runner C;6 - riser;7 - reinforcing rib;8 - inner gate;9 - cold iron;10 - filter;11 - bottom gate;12 - casting cavity;13 - bottom gate. DETAILED DESCRIPTION
[0015] In order to better understand the utility model, the content of the utility model is further illustrated below in conjunction with examples, but the content of the utility model is not only limited to the following examples.
[0016] Combine the attached Figure 1The utility model discloses a kind of automobile calipers casting mould capable of reducing casting shrinkage hole, casting cavity 12 and pouring system are provided on mould base plate, the pouring system includes transverse gate 2 and interval setting vertical gate A 3, vertical gate B 4 and vertical gate C 5, transverse gate 2 is trapezoidal structure, transverse gate 2 radius gradually shrinks from middle to both sides, so that metal liquid can be evenly distributed to each vertical gate, the main function of transverse gate is distribution metal liquid, and utilize its own structure to carry out preliminary slag, gas separation to metal liquid, upper bottom middle portion of transverse gate 2 is communicated with the bottom of sprue cup 1, sprue cup selects hexagonal funnel shape sprue cup, upper length is 155mm, lower length is 57mm, height is 52mm, such size can guarantee enough metal liquid storage capacity, prevent the phenomenon of flow breakage during pouring, its main role is to accept metal liquid from ladle, and make metal liquid flow into transverse gate smoothly, lower bottom middle portion of transverse gate 2 is communicated with the upper end of vertical gate B 4, lower bottom left end of transverse gate 2 is connected with the upper end of vertical gate A 3, lower bottom right end of transverse gate 2 is connected with the upper end of vertical gate C 5, upper and lower two casting cavities 12 are respectively arranged between adjacent vertical gate, cold iron 9 is respectively arranged at the position of thick part adjacent to the casting cavity 12, cooling speed is controlled, by adjusting the cooling mode and cooling time of casting, metal liquid can be evenly cooled during solidification process, avoid local overheating and supercooling, bottom gate 11 horizontally arranged below the casting cavity 12, one end of the bottom gate 11 is communicated with vertical gate B 4, the other end of the bottom gate 11 is communicated with vertical gate A 3 or vertical gate B 4, a plurality of bottom gates 11 are communicated with corresponding bottom gates 11, bottom gate 13 is arranged at the bottom of the casting cavity 12, metal liquid slowly rises from the bottom of casting, avoid the spatter and turbulence of metal liquid, reduce the involvement of gas and oxidation, riser 6 is respectively arranged on the left and right sides of the casting cavity 12, the bottom inside of the riser 6 is communicated with corresponding casting cavity 12 through inner gate 8, the inner gate of each inner gate 8 is trapezoidal structure, and the inner gate is arranged on the side of the casting cavity 12 close to the bottom, so that metal liquid can be filled in the cavity smoothly from the bottom, avoid the direct impact of metal liquid on the cavity to produce defects, and be beneficial to the gas discharge in the cavity, the bottom outside of the riser 6 is communicated with the end of corresponding bottom gate 11, the utility model discloses a kind of automobile calipers casting mould capable of reducing casting shrinkage hole adopts sequential solidification principle, by setting riser 6 and cold iron 9 at thick part of casting, so that the temperature of iron water in casting is always higher on the upper side than on the lower side, so that metal liquid can be supplemented in a certain order during solidification process, reduce the generation of shrinkage hole;
[0017] It needs to be explained here that the utility model discloses the design of the parting surface and the core, so that the casting can be more smoothly in the molding and demolding process, and the deformation and crack of the casting are reduced, the riser 6 in the utility model is the cylindrical structure of φ40mm, and the height is 115mm, and the riser mainly has the following three aspects: one is feeding, in the solidification process of the casting, the metal liquid can shrink in volume, a certain amount of high-temperature metal liquid is stored in the riser, can continuously feed the liquid metal for the casting, prevent the casting from producing shrinkage cavity, shrinkage and other defects because of shrinkage, ensure the compactness of the casting, for example, when casting large cast iron parts, like the large casting of machine tool bed, the metal liquid can have obvious volume shrinkage when cooling and solidifying, and the riser can play the feeding role well, two is exhaust, in the pouring process, there will be air and gas generated by the reaction of the metal liquid in the cavity, the riser can be used as the passage for the exhaust of these gases, reduce the blowhole in the casting, and improve the quality of the casting, three is slag collection, the slag and other impurities in the metal liquid can float up because of small density, and the riser can collect these slag, avoid the slag from entering the inside of the casting and affecting the performance of the casting.
[0018] As an optional design, preferably, the automobile caliper casting mold capable of reducing casting shrinkage holes is provided with filters 10 at two ends of the bottom gate 11, so as to improve the purity of the metal liquid.
[0019] As an optional design, preferably, the automobile caliper casting mold capable of reducing casting shrinkage holes is provided with filters 10 at two ends of the bottom gate 11, so as to improve the purity of the metal liquid.
[0020] As an optional design, preferably, the automobile caliper casting mold capable of reducing casting shrinkage holes is provided with filters 10 at two ends of the bottom gate 11, so as to improve the purity of the metal liquid.
[0021] As an optional design, preferably, the automobile caliper casting mold capable of reducing casting shrinkage holes is provided with filters 10 at two ends of the bottom gate 11, so as to improve the purity of the metal liquid.
[0022] The working process of the utility model is as follows:
[0023] When casting, the molten metal from the ladle is received by the sprue cup 1 and flows smoothly into the runner 2, and then flows into the vertical sprue A 3, the vertical sprue B 4 and the vertical sprue C 5, respectively, and then flows into the bottom runner 11 through the filter 10, and then a part of the molten metal in the bottom runner 11 flows into the corresponding casting cavity 12 through the bottom gate 13, and the other part of the molten metal flows into the corresponding casting cavity 12 through the bottom inner gate 8 in the bottom of the riser 6, and the bottom gating system is adopted, the pouring temperature is 1420℃, the pouring speed is 2kg / s, the sequential solidification principle is adopted, the riser 6 and the chill 9 are arranged at the thick part of the casting cavity 12, so that the temperature of the molten metal at the upper edge of the casting cavity 12 is always higher than that at the lower edge, and the molten metal can be sequentially supplemented during the solidification process, the generation of shrinkage holes is reduced, the cooling speed is controlled, the cooling time of the casting in the sand mold is 2 hours, the cooling mode and the cooling time of the casting are adjusted, so that the molten metal can be uniformly cooled during the solidification process, local overheating and undercooling are avoided, the solidification characteristics of the molten metal are improved by adopting inoculation treatment and modification treatment and other methods, the shrinkage defects of the casting are effectively reduced, and the quality and performance of the casting are improved.
[0024] The above description is only the application implementation manner of the utility model, but the protection scope of the utility model is not limited to this, and the utility model cannot be limited by this to limit the right scope of the utility model, and any equivalent change according to the technical scheme of the utility model should be covered in the protection scope of the utility model.
Claims
1. An automobile caliper casting mold capable of reducing shrinkage cavity of a casting, a casting cavity and a gating system are provided on a mold base plate, characterized in that: The gating system comprises a sprue, and spaced-apart vertical sprues A, B and C, the sprue is of trapezoidal structure, the middle of the lower base of the sprue communicates with the bottom of the sprue cup, the middle of the lower base of the sprue communicates with the upper end of the vertical sprue B, the left end of the lower base of the sprue is connected with the upper end of the vertical sprue A, and the right end of the lower base of the sprue is connected with the upper end of the vertical sprue C, two casting cavities are arranged above and below between adjacent vertical sprues, chills are arranged at positions of thick parts adjacent to the casting cavities, bottom runners horizontally arranged below the casting cavities are provided, one end of the bottom runner communicates with the vertical sprue B, the other end of the bottom runner communicates with the vertical sprue A or the vertical sprue B, bottom gates communicating with the corresponding bottom runners are arranged at the bottom of the casting cavities, risers are arranged at the left and right sides of the casting cavities, the bottom inside of the riser communicates with the corresponding casting cavity through an inner gate, and the bottom outside of the riser communicates with the end of the corresponding bottom runner. 2. The casting mold for an automobile caliper capable of reducing shrinkage cavity according to claim 1, wherein: Filters are arranged at both ends of the bottom runner.
3. The casting mold for an automobile caliper capable of reducing shrinkage cavity according to claim 1 or 2, characterized in that: The vertical sprues A, B and C are of semi-cylindrical structure, and the radii of the vertical sprues A, B and C gradually decrease from top to bottom.
4. The casting mold for an automobile caliper capable of reducing shrinkage cavity according to claim 3, wherein: The sectional area ratio of the inner gate, the sprue and the vertical sprue is 1:1.2:1.
5.
5. The casting mold for an automobile caliper capable of reducing shrinkage cavity according to claim 3, wherein: Reinforcing ribs are arranged at weak positions of the casting cavities.