A caliper through hole forming die

Abstract

The utility model discloses a caliper through -hole forming die belongs to mechanical processing field, including core -pulling, core -pulling sleeve and locking assembly, the core -pulling coaxially inserts the setting in the core -pulling sleeve inner chamber, and the core -pulling sleeve top is equipped with locking assembly, and the core -pulling insertion setting in the core -pulling sleeve is fixed connection through locking assembly. The utility model discloses cost saving, and the production efficiency is greatly improved, and the production cycle is greatly shortened, and the working efficiency of modeling and cleaning station is improved. Significantly improve product quality, completely eliminate the quality hidden danger of salt core residual and lead to oil channel blockage. The versatility of the mold is enhanced, and the number of tooling is reduced. The generation of salt-containing wastewater is completely avoided, and the environmental protection pressure is reduced. At the same time, the health risks of the operating personnel contacting and inhaling salt core dust are also eliminated, and the working environment is improved. The structure is reliable, convenient to maintain and low in maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of machining, specifically a caliper through-hole forming mold. Background Technology

[0002] Automotive brake calipers are key actuators in disc braking systems, containing complex oil passages and piston chambers. The traditional and mainstream method for forming these internal cavities during the casting process is using salt cores, also known as water-soluble cores. Salt cores are formed by pressing and sintering an inorganic salt mixture with a binder. After the casting is poured and cooled, the salt core is dissolved and removed using a high-pressure water jet or by immersing the casting in water, thus creating the complex internal pores.

[0003] However, this salt core technology has many inherent drawbacks: High cost: Salt cores are a specialized consumable, and their manufacturing and sintering processes require specialized equipment and techniques, resulting in high raw material and energy costs. Each casting requires a new salt core, leading to persistently high unit production costs.

[0004] The process is complex and time-consuming: During the molding process, operators need to carefully place the salt core into a specific cavity of the mold, requiring high positioning accuracy and involving a cumbersome placement process, which affects molding efficiency. Subsequent cleaning processes require specialized dissolving equipment and treatment of saline wastewater, further increasing the complexity and time cycle of the production process.

[0005] Quality Risks: Salt cores have limited strength and are prone to damage or breakage during handling, core setting, and pouring, leading to casting scrap. Furthermore, salt cores are highly hygroscopic; improper storage or poor humidity control can reduce their strength, further increasing the scrap rate. Incomplete dissolution can result in residues clogging oil passages, causing serious quality risks.

[0006] Environmentally unfriendly: The wastewater generated from dissolving salt cores contains high concentrations of salt and other chemicals, which need to be treated before discharge; otherwise, it will pollute the environment and increase environmental protection costs and treatment burden.

[0007] Therefore, there is an urgent need in this field for an alternative technology that can overcome the above-mentioned shortcomings in order to reduce the production cost of calipers, simplify the process flow, improve product quality stability, and reduce environmental impact. Utility Model Content

[0008] The purpose of this utility model is to provide a caliper through-hole forming mold to address the existing problems, such as high cost, complex process, high quality risk, and environmental unfriendliness of existing salt core technology.

[0009] To achieve the above objectives, this utility model provides the following technical solution: A caliper through-hole forming mold includes a core puller, a core puller sleeve, and a locking assembly; the core puller is coaxially inserted into the inner cavity of the core puller sleeve, and the top end of the core puller sleeve is provided with a locking assembly, and the core puller is inserted into the core puller sleeve and fixedly connected by the locking assembly.

[0010] As a further embodiment of this utility model, the core puller is provided with a fastening screw.

[0011] As a further embodiment of this utility model: the core-pulling sleeve is provided with a screw through hole, which is an axially extending elongated through hole provided on the cylinder wall of the core-pulling sleeve.

[0012] As a further embodiment of this utility model: the locking assembly includes a locking cap, a locking connector, and a locking buckle.

[0013] As a further embodiment of this utility model, the locking connector is detachably installed on the top of the core-pulling sleeve by means of threads or slots.

[0014] As a further embodiment of this utility model: the locking buckle is disposed on the side wall of the locking connector.

[0015] As a further embodiment of this utility model, the locking cap is disposed above the locking connector.

[0016] As a further embodiment of this utility model: the core puller is made of hot work die steel.

[0017] As a further embodiment of this invention: the core-pulling surface is provided with a nitrided heat-resistant and wear-resistant layer.

[0018] As a further embodiment of this utility model: the locking component is a radially arranged spring pin or ball-head plunger, and a ring-shaped locking groove is provided at the corresponding position on the top of the core puller.

[0019] Compared with the prior art, the beneficial effects of this utility model are: This invention saves costs and improves production efficiency by eliminating lengthy steps such as salt core storage, pretreatment, placement, and subsequent dissolution and cleaning, significantly shortening the production cycle and improving the efficiency of molding and cleaning stations. It also significantly improves product quality: the mechanical core-pulling mechanism has much higher strength and rigidity than salt cores, avoiding the risk of breakage during handling and casting, resulting in more stable and higher dimensional accuracy and surface quality of the internal channels of the casting. It completely eliminates the quality hazard of oil channel blockage caused by salt core residue. The superior process flexibility and adaptability of this invention enhance the versatility of the mold and reduce the number of tooling fixtures. It completely avoids the generation of salt-containing wastewater, reducing environmental pressure. Simultaneously, it eliminates the health risks of operators coming into contact with and inhaling salt core dust, improving the working environment. The structure is reliable and maintenance is convenient: the locking assembly ensures the absolute stability of the core-pulling position during high-pressure casting. The modular design of the entire mechanism allows for targeted replacement of damaged parts in case of wear, resulting in low maintenance costs. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a caliper through-hole forming mold.

[0021] In the diagram: 1. Pull-out core; 2. Pull-out core sleeve; 3. Locking assembly; 11. Fastening screw; 21. Screw through hole; 31. Locking cap; 32. Locking connector; 33. Locking buckle. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings showing multiple embodiments according to this application. It should be understood that the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments described in this application without creative effort will fall within the scope of protection of this application.

[0023] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing specific embodiments only and is not intended to limit this application; the terms "comprising," "including," "having," "containing," etc., in the description, claims, and accompanying drawings of this application are open-ended terms. Therefore, "comprising," "including," or "having" refers to, for example, a method or apparatus having one or more steps or elements, but is not limited to having only these one or more elements. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0024] In the description of this invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0026] It should be emphasized that when the term "comprising / including" is used in this specification, it is used to explicitly indicate the presence of the stated feature, integer, step, or component, but does not exclude the presence or addition of one or more other features, integers, steps, parts, or groups of features, integers, steps, or parts.

[0027] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0028] Please see Figure 1 A caliper through-hole forming mold includes a core puller 1, a core puller sleeve 2, and a locking assembly 3; the core puller 1 is coaxially inserted into the inner cavity of the core puller sleeve 2, and the top of the core puller sleeve 2 is provided with the locking assembly 3; the core puller 1 is inserted into the core puller sleeve 2 and fixedly connected by the locking assembly 3. The core puller 1 and the core puller sleeve 2 are coaxial and can move relative to each other along their axial direction. The locking assembly 3 is used to fix the core puller 1 and the core puller sleeve 2 relative to each other in the final position.

[0029] Furthermore, the core puller 1 is equipped with a fastening screw 11; Furthermore, the core-pulling sleeve 2 is provided with a screw through hole 21, which is an axially extending elongated through hole provided in the cylinder wall of the core-pulling sleeve 2. During operation, the interplay between the screw through-hole 21 and the fastening screw 11 ensures the adjustment of the distance between the core puller 1 and the core puller sleeve 2, facilitating the work. The screw portion of the fastening screw 11 passes through the screw through-hole 21 and extends out of the sleeve, while its nut portion is located on the inner or outer side of the sleeve wall for positioning. By loosening the fastening screw 11, the axial position of the core puller 1 within the core puller sleeve 2 can be adjusted; after adjustment, tightening the fastening screw 11 temporarily fixes the two components in place using the friction between the screw head and the sleeve wall, ensuring the stability of the relative positions of the components before mold closing.

[0030] Furthermore, the locking assembly 3 includes a locking cap 31, a locking connector 32, and a locking buckle 33; the locking assembly 3 is a key component that ensures the core-pulling mechanism can withstand the scouring of molten metal during the casting process without displacement.

[0031] Furthermore, the locking connector 32 is detachably installed on the top of the core-pulling sleeve 2 by means of threads or slots; Furthermore, a locking buckle 33 is provided on the side wall of the locking connector 32, and the locking buckle 33 has a locking mechanism inside that matches the top structure of the pull core 1, such as a boss, groove, or a specific contour. When the pull core 1 moves to the predetermined final position, the locking buckle 33 can automatically or manually engage to achieve a hard lock and prevent the pull core from retracting.

[0032] Furthermore, the locking cap 31 is positioned above the locking connector 32. Its main function is to seal the internal space of the locking assembly 3, preventing molten metal from entering the locking mechanism under high pressure, affecting its function, or causing the core to be unable to be successfully removed.

[0033] The core puller 1 is a part that directly forms the internal channel profile of the casting. It is usually made of hot work die steel (such as H13) and its surface needs to be nitrided to improve heat resistance and wear resistance. The shape of its front working part is completely consistent with the contour of the internal oil passage or piston chamber of the caliper to be formed.

[0034] When the core puller 1 is inserted into the core puller sleeve 2, the locking component 3 at the front end of the core puller sleeve 2 will move up and down as it moves forward or backward. When the locking component 3 is lifted up, it is the final state of the core puller, and the shape of the front end is the same as the salt core used before. When you want to pull it out, the core puller 1 moves backward, the locking component 3 falls down, and then the core puller is pulled out of the mold as a whole.

[0035] The core-pulling sleeve 2, serving as the guide and support for the core-pulling sleeve 1, is also made of high-strength steel. Its interior features a precision-machined smooth hole that fits snugly with the rod of the core-pulling sleeve 1, ensuring smooth sliding of the core-pulling sleeve 1. An axially oriented screw through-hole 21 is provided on the sleeve wall of the core-pulling sleeve 2; this elongated hole provides travel space for the movement of the fastening screw 11.

[0036] The locking assembly 3 is crucial for ensuring casting accuracy. The locking connector 32 is threaded onto the top of the core-pulling sleeve 2. It has an internal cavity to accommodate the top of the core-pulling sleeve 1. The locking buckle 3 is essentially a radially positioned spring pin or ball-head plunger, installed within a side wall hole of the locking connector 32. In its natural state, the steel ball or pin of the locking buckle 33 protrudes partially from the inner cavity under the action of the internal spring. A ring-shaped locking groove is provided at the corresponding position on the top of the core-pulling sleeve 1.

[0037] Compared with the prior art, the present invention has the following significant advantages: This invention saves costs by completely eliminating disposable salt cores and replacing them with a metal core-pulling mechanism that can be reused thousands or even tens of thousands of times. Although the initial manufacturing cost is higher, the cost is negligible when spread across each casting, resulting in extremely significant long-term economic benefits.

[0038] This invention improves production efficiency by eliminating lengthy steps such as storage, pretreatment, placement, and subsequent dissolution and cleaning of salt cores, thus greatly shortening the production cycle and improving the work efficiency of the molding and cleaning stations.

[0039] This invention significantly improves product quality: the mechanical core-pulling method offers far greater strength and rigidity than salt cores, avoiding the risk of breakage during handling and casting. The dimensional accuracy and surface quality of the internal channels in the casting are more stable and superior. It also completely eliminates the quality hazard of oil channel blockage caused by salt core residue.

[0040] This utility model boasts excellent process flexibility and adaptability: through the "fastening screw-screw through hole" structure, the extension length of the core pull can be easily fine-tuned, enabling a single core pull mechanism to adapt to different products within a certain size range, enhancing the versatility of the mold and reducing the number of tooling.

[0041] This invention is both environmentally friendly and safe to operate: it completely avoids the generation of saline wastewater, reducing environmental pressure. At the same time, it eliminates the health risks of operators coming into contact with and inhaling salt core dust, improving the working environment.

[0042] This invention features a reliable structure and convenient maintenance: the locking assembly ensures absolute stability of the core-pulling position during high-pressure casting. The entire mechanism is modularly designed; if wear occurs, damaged parts can be replaced selectively, resulting in low maintenance costs.

[0043] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects; the scope of this invention is defined by the appended claims rather than the foregoing description; and thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution; this narrative style is merely for clarity; those skilled in the art should consider the specification as a whole; the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A caliper through-hole forming mold, characterized in that, It includes a core puller (1), a core puller sleeve (2), and a locking assembly (3); the core puller (1) is coaxially inserted into the inner cavity of the core puller sleeve (2), and the top of the core puller sleeve (2) is provided with a locking assembly (3). The core puller (1) is inserted into the core puller sleeve (2) and fixedly connected by the locking assembly (3).

2. The caliper through-hole forming mold according to claim 1, characterized in that, The core puller (1) is provided with a fastening screw (11).

3. The caliper through-hole forming mold according to claim 2, characterized in that, The core-pulling sleeve (2) is provided with a screw through hole (21), which is an axially extending elongated through hole provided on the cylinder wall of the core-pulling sleeve (2).

4. A caliper through-hole forming mold according to claim 3, characterized in that, The locking assembly (3) includes a locking cap (31), a locking connector (32), and a locking buckle (33).

5. A caliper through-hole forming mold according to claim 4, characterized in that, The locking connector (32) is detachably installed on the top of the core-pulling sleeve (2) by means of threads or slots.

6. A caliper through-hole forming mold according to claim 5, characterized in that, The locking buckle (33) is located on the side wall of the locking connector (32).

7. A caliper through-hole forming mold according to claim 6, characterized in that, The locking cap (31) is positioned above the locking connector (32).

8. A caliper through-hole forming mold according to claim 7, characterized in that, The core puller (1) is made of hot work die steel.

9. A caliper through-hole forming mold according to claim 8, characterized in that, The core puller (1) has a nitrided heat-resistant and wear-resistant layer on its surface.

10. A caliper through-hole forming mold according to claim 9, characterized in that, The locking assembly (3) is a radially arranged spring pin or ball-head plunger, and a ring-shaped locking groove is provided at the corresponding position on the top of the core puller (1).

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