One-mold four-piece HWS static pressure molding casting device for brake drums
By designing a four-piece HWS static pressure molding casting device for brake drums, and adopting a cross-shaped arrangement and filter structure, the problems of low efficiency and low yield in the existing technology were solved, achieving high-efficiency casting and high yield of four-piece brake drums, and reducing production costs.
Patent Information
- Application Number
- CN202520372775.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-05
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-03-05
AI Technical Summary
The existing HWS static pressure molding casting process and equipment suffer from low efficiency, high energy consumption, and low yield. In particular, in brake drum casting, a maximum of two pieces can be produced, resulting in low production efficiency and yield.
Design a four-piece HWS static pressure molding casting device for brake drums, including four brake drum models, one pouring cup, one sprue, four runners and eight ingates. It adopts a cross-shaped arrangement and a centrally symmetrical pouring method, combined with a foam ceramic filter, overlapping parts, runner diameter reducers and slag collection bag, to achieve simultaneous casting of four brake drum models.
The system achieves efficient casting of four brake drum components of one type, with a yield rate of over 90%, significantly improving production efficiency and material utilization while reducing production costs.
Smart Images
Figure CN223862803U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of HWS static pressure molding casting technology, specifically a brake drum type four-piece HWS static pressure molding casting device. Background Technology
[0002] In existing technologies, brake drum casting is generally carried out using sand casting, with one or two pieces per mold. This results in low production efficiency, high production costs, and severe environmental pollution, and the gating system and mold design are relatively complex. Due to the large volume of brake drums used, automated equipment is preferred to reduce costs, leading to the increasing adoption of automated molding production. Therefore, the previous sand casting process has been gradually replaced by the HWS static pressure molding casting process. Using wet sand in the HWS static pressure molding machine for automated brake drum production has become the preferred molding method both domestically and internationally, offering significant advantages in production efficiency, energy saving, and environmental friendliness. However, current HWS static pressure molding casting processes and equipment are limited to placing 1-2 pieces per mold, resulting in a low yield of only about 75%, and still suffer from low efficiency and high energy consumption. Utility Model Content
[0003] The purpose of this utility model is to provide a four-piece HWS static pressure molding casting device for brake drums, in order to solve the problems of low efficiency, high energy consumption and low yield in the existing brake drum casting production.
[0004] The present invention provides a four-piece HWS static pressure molding casting device for brake drums, comprising: four brake drum models, one pouring cup, one sprue, four gating runners, and eight ingate runners. The upper end of the sprue is connected to the pouring cup. The four gating runners are arranged in a cross shape. The four brake drum models are centrally symmetrically arranged, with the center of symmetry being the central intersection point of the four cross gating runners. The central intersection point is connected to the lower end of the sprue. Each gating runner is connected to two ingate runners, and the two ends of each ingate runner are respectively connected to one of the brake drum models.
[0005] Furthermore, in the above-mentioned brake drum type four-piece HWS static pressure molding casting device, the positions of the pouring cup and the sprue correspond to the center of the cross-shaped horizontal sprue, and the pouring method of the brake drum type four-piece HWS static pressure molding casting device is the middle pouring method of the four brake drum models.
[0006] Furthermore, in the above-mentioned brake drum type four-piece HWS static pressure molding casting device, the two ends of the ingate are connected to the brake drum model via the ingate, and for each brake drum model, there are four ingates connected via the four ingates.
[0007] Furthermore, in the aforementioned brake drum type four-piece HWS static pressure molding casting device, each of the horizontal runners is equipped with a foam ceramic filter, an overlapping component, a horizontal runner diameter reducer, and a slag collection bag. The foam ceramic filter is located on the side of the horizontal runner near the central intersection point to filter the molten iron injected into the horizontal runner. The overlapping component is located between the foam ceramic filter and the connection point between the horizontal runner and the ingate to buffer the molten iron. The horizontal runner diameter reducer is located between the horizontal runner and the connection point between the two ingates to synchronize the injection of molten iron. The slag collection bag is located at the end of the horizontal runner away from the central intersection point to collect and store impurities in the molten iron and condensed slag during the casting process.
[0008] Furthermore, in the aforementioned four-piece HWS static pressure molding casting device for brake drum type 1, the maximum outer diameter of the brake drum model is 270–290 mm, and the maximum height is 220–325 mm; the sprue has a circular cross-section with a diameter of 45–50 mm; the glide section has a trapezoidal cross-section with a height × average width of (28 mm ± 3 mm) × (28 mm ± 3 mm); the connecting piece has a trapezoidal cross-section with a height × average width of (28 mm ± 3 mm) × (33 mm ± 3 mm); The variable diameter component of the horizontal runner has a trapezoidal cross-section with a height × average width of (27mm ± 3mm) × (25mm ± 3mm); the slag collection bag has a trapezoidal cross-section with a height × average width of (48mm ± 3mm) × (26mm ± 3mm); the ingate has a trapezoidal cross-section with a height × average width of (5.5mm ± 1mm) × (50mm ± 3mm), wherein the height of the trapezoidal cross-section refers to the vertical distance between the upper and lower bases of the trapezoid, and the average width of the trapezoidal cross-section is the length of the midline of the trapezoid.
[0009] Furthermore, in the aforementioned four-piece HWS static pressure molding casting device for brake drum type 1, the maximum outer diameter of the brake drum model is 290mm and the maximum height is 325mm; the sprue has a circular cross-section with a diameter of 50mm; the runner has an isosceles trapezoidal cross-section with a height × average width of 28mm × 28mm; the lap joint has an isosceles trapezoidal cross-section with a height × average width of 28mm × 33mm; the runner reducer has an isosceles trapezoidal cross-section with a height × average width of 27mm × 25mm; the slag collection bag has an isosceles trapezoidal cross-section with a height × average width of 48mm × 26mm; and the ingate has an isosceles trapezoidal cross-section with a height × average width of 5.5mm × 50mm.
[0010] Furthermore, in the above-mentioned brake drum type four-piece HWS static pressure molding casting device, the weight of the brake drum type four-piece HWS static pressure molding casting device is 28KG, the liquid carrying capacity of each brake drum model is 65KG, the weight of a single box casting is 288KG, and the casting yield is over 90%.
[0011] The four-piece HWS static pressure molding casting device for brake drum of this utility model has the following advantages and beneficial effects:
[0012] This invention enables the casting production of four brake drums in one mold, completely solving the inefficiency problem of existing technologies where a maximum of two pieces can be produced per mold. It can achieve a yield rate of over 90%, which is significantly higher than the 75% yield rate of existing technologies. This significantly improves the material utilization efficiency during the casting process, greatly increases the production efficiency of brake drum castings, and effectively reduces the production cost of brake drum castings. It has obvious technical advantages and advanced process. Attached Figure Description
[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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. In the drawings:
[0014] Figure 1 This is a perspective view of the four-piece HWS static pressure molding and casting device for brake drum of this utility model.
[0015] Figure 2 This is the front view of the brake drum type four-piece HWS static pressure molding casting device of this utility model;
[0016] Figure 3 This is a rear view of the brake drum type four-piece HWS static pressure molding casting device of this utility model;
[0017] Figure 4 For along Figure 2 The view from point A (arrow A);
[0018] Figure 5 For along Figure 2 The view from direction B of the middle arrow B;
[0019] Figure 6 for Figure 3 Enlarged diagram of section C;
[0020] Figure 7 for Figure 3 Enlarged schematic diagram of section D in the middle.
[0021] Explanation of reference numerals in the attached figures:
[0022] 1-Brake drum model, 2-Sprue cup, 3-Straight runner, 4-Foam ceramic filter, 5-Overlapping part, 6-Horizontal runner, 7-Horizontal runner reducer, 8-Slag collection bag, 9-Ingate, 10-Ingate. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0024] like Figures 1 to 7 As shown, the four-piece HWS static pressure molding casting device for brake drums of this utility model includes: four brake drum models 1, one pouring cup 2, one sprue 3, four horizontal sprues 6, and eight ingates 9. The upper end of the sprue 3 is connected to the pouring cup 2. The four horizontal sprues 6 are arranged in a cross shape. The four brake drum models 1 are arranged in a centrally symmetrical manner. The center of symmetry is the central intersection point of the four horizontal sprues 6. The central intersection point of the four horizontal sprues 6 is connected to the lower end of the sprue 3. Each horizontal sprue 6 is connected to two ingates 9. The two ends of each ingate 9 are connected to one brake drum model 1.
[0025] In the above-mentioned brake drum type four-piece HWS static pressure molding casting device, the upper end of the sprue 3 is connected to the pouring cup 2, and the lower end of the sprue 3 is connected to the central intersection of the four cross-shaped horizontal sprues 6. The four brake drum models 1 are arranged in a centrally symmetrical manner with the central intersection of the four cross-shaped horizontal sprues 6 as the center. Thus, the positions of the pouring cup 2 and the sprue 2 correspond to the center of the four cross-shaped horizontal sprues 6. That is, in the brake drum type four-piece HWS static pressure molding casting device of this utility model, the pouring cup 2 and the sprue 2 are located at the center of the entire device, and the pouring method of the brake drum type four-piece HWS static pressure molding casting device of this utility model is the pouring method in the middle of the four brake drum models 1.
[0026] Furthermore, in the aforementioned four-piece HWS static pressure molding casting device for brake drums, both ends of each ingate 9 are connected to the brake drum model 1 via ingates 10. Since each sprue 6 is connected to two ingates 9, the four sprues 6 are connected to a total of eight ingates 9. At the same time, since both ends of each ingate 9 are connected to one brake drum model 1, for each brake drum model 1, four ingates 9 are connected via four ingates 10. That is, in the four-piece HWS static pressure molding casting device for brake drums of this utility model, each brake drum model 1 is allocated four ingates 9, thereby each brake drum model 1 is evenly injected with molten iron through four ingates 10.
[0027] Furthermore, in the aforementioned four-piece HWS static pressure molding casting device for brake drum type 1, each horizontal runner 6 is equipped with a foam ceramic filter 4, an overlapping component 5, a horizontal runner diameter reducer 7, and a slag collection bag 8. The foam ceramic filter 4 is located on the side of the horizontal runner 6 near the aforementioned central intersection point, used to filter the molten iron injected into the horizontal runner 6, preventing impurities in the molten iron from entering the brake drum mold 1 and affecting the quality of the brake drum casting. The overlapping component 5 is located between the foam ceramic filter 4 and the connection point between the horizontal runner 6 and the ingate 9, used to buffer the molten iron and prevent the formation of turbulent flow. The horizontal runner diameter reducer 7 is located between the horizontal runner 6 and the connection point between the two ingates 9, used to synchronize the injection of molten iron, ensuring that the molten iron enters the two ingates 9 connected to the horizontal runner 6 synchronously and evenly, thereby allowing the molten iron to be evenly and synchronously injected into the cavity of the brake drum mold 1 through the four ingates 10. The slag collection bag 8 is located at the end of the horizontal runner 6 away from the aforementioned central intersection point. It is used to collect and store possible molten iron impurities and condensed slag during the pouring process, so as to prevent impurities and slag from entering the cavity of the brake drum mold 1 and affecting the quality of the brake drum casting.
[0028] In one specific embodiment, in the above-mentioned four-piece HWS static pressure molding casting device for brake drum type 1, the maximum outer diameter of brake drum model 1 is 270-290mm, the maximum height is 220-325mm, the sprue 3 has a circular cross-section with a diameter of 45-50mm, the glide sprue 6 has a trapezoidal cross-section with a height × average width of (28mm±3mm) × (28mm±3mm), the connecting piece 5 has a trapezoidal cross-section with a height × average width of (28mm±3mm) × (33mm±3mm), and the glide sprue... The reducing component 7 has a trapezoidal cross-section with a height × average width of (27mm ± 3mm) × (25mm ± 3mm). The slag collection bag 8 has a trapezoidal cross-section with a height × average width of (48mm ± 3mm) × (26mm ± 3mm). The ingate 10 has a trapezoidal cross-section with a height × average width of (5.5mm ± 1mm) × (50mm ± 3mm). The height of the trapezoidal cross-section refers to the vertical distance between the upper and lower bases of the trapezoid. In this paper, the average width of the trapezoidal cross-section is defined as the length of the midline of the trapezoid.
[0029] Preferably, the brake drum model 1 has a maximum outer diameter of 290mm and a maximum height of 325mm. The sprue 3 has a circular cross-section with a diameter of 50mm. The runner 6 has an isosceles trapezoidal cross-section with a height × average width of 28mm × 28mm. The lap joint 5 has an isosceles trapezoidal cross-section with a height × average width of 28mm × 33mm. The runner reducer 7 has an isosceles trapezoidal cross-section with a height × average width of 27mm × 25mm. The slag collection bag 8 has an isosceles trapezoidal cross-section with a height × average width of 48mm × 26mm. The ingate 10 has an isosceles trapezoidal cross-section with a height × average width of 5.5mm × 50mm.
[0030] The process of casting a brake drum in a single form with four pieces using the HWS static pressure molding casting device of this utility model is as follows: using scrap steel and pig iron with good consistency as the main raw materials, and adding corresponding alloying elements according to the chemical composition requirements of the brake drum casting product, the raw materials are added to the medium frequency induction furnace to melt into molten iron for casting. The molten iron is poured into the HWS static pressure molding casting device of a single form with four pieces from the pouring cup 2 in a center pouring manner. The molten iron is poured into the four brake drum molds 1 evenly and synchronously through the straight sprue 3, the horizontal sprue 6, the ingate 9 and finally through the ingate 10, thus realizing the casting of a single form with four pieces of brake drum.
[0031] As a specific implementation, the above-mentioned brake drum type four-piece HWS static pressure molding casting device weighs 28KG, each brake drum model 1 has a liquid holding capacity of 65KG, and the weight of a single casting is 4×65KG=260KG. That is, using the brake drum type four-piece HWS static pressure molding casting device of this utility model, a total weight of 260KG of a type four-piece brake drum casting can be produced in one casting. Therefore, the casting yield (acceptance rate) = [casting weight / (casting device weight + casting weight)]×100% = [260KG / (28KG + 260KG)]×100% = 90.3%.
[0032] In summary, by utilizing the HWS static pressure molding casting device for four brake drums of this invention, multiple batches of brake drum casting production were carried out. Based on actual production conditions, this invention achieved the casting production of four brake drums of one type, completely solving the inefficiency problem of existing technologies where a maximum of two pieces could be produced per type. It also achieved a yield rate of over 90%, a significant improvement over the 75% yield rate of existing technologies. This significantly improved the material utilization efficiency during the casting process, greatly increased the production efficiency of brake drum castings, and effectively reduced the production cost of brake drum castings, demonstrating significant technical advantages and advanced processes.
[0033] It should be noted that, unless otherwise expressly specified and limited, the term "connection" or its synonyms should be interpreted broadly in this document. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Furthermore, expressions such as "first" and "second" are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Meanwhile, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In addition, the terms "front," "rear," "left," "right," "upper," and "lower" in this document refer to the placement states shown in the accompanying drawings.
[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A four-piece HWS static pressure molding casting device for brake drums, characterized in that, The four-piece HWS static pressure molding casting device for brake drums includes: four brake drum models, one pouring cup, one sprue, four runners, and eight ingates. The upper end of the sprue is connected to the pouring cup. The four runners are arranged in a cross shape. The four brake drum models are centrally symmetrical, with the center of symmetry being the central intersection point of the four cross runners. The central intersection point is connected to the lower end of the sprue. Each runner is connected to two ingates, and the two ends of each ingate are connected to one of the brake drum models.
2. The brake drum type four-piece HWS static pressure molding casting device according to claim 1, characterized in that, The positions of the pouring cup and the sprue correspond to the center of the cross-shaped sprue. The pouring method of the four-piece HWS static pressure molding casting device of the brake drum type is the middle pouring method of the four brake drum models.
3. The brake drum type four-piece HWS static pressure molding casting device according to claim 2, characterized in that, The two ends of the ingate are connected to the brake drum model via ingates, and for each brake drum model, there are four ingates connected via four ingates.
4. The brake drum type four-piece HWS static pressure molding casting device according to claim 3, characterized in that, Each of the aforementioned horizontal runners is equipped with a foam ceramic filter, an overlapping component, a horizontal runner diameter reducer, and a slag collection bag. The foam ceramic filter is located on the side of the horizontal runner near the central intersection point and is used to filter the molten iron injected into the horizontal runner. The overlapping component is located between the foam ceramic filter and the connection point between the horizontal runner and the ingate, and is used to buffer the molten iron. The horizontal runner diameter reducer is located between the horizontal runner and the connection point between the two ingates, and is used to synchronize the injection of molten iron. The slag collection bag is located at the end of the horizontal runner away from the central intersection point and is used to collect and store impurities in the molten iron and condensed slag during the casting process.
5. The brake drum type four-piece HWS static pressure molding casting device according to claim 4, characterized in that, The maximum outer diameter of the brake drum model is 270–290 mm, and the maximum height is 220–325 mm; the sprue has a circular cross-section with a diameter of 45–50 mm; the runner has a trapezoidal cross-section with a height × average width of (28 mm ± 3 mm) × (28 mm ± 3 mm); the connecting piece has a trapezoidal cross-section with a height × average width of (28 mm ± 3 mm) × (33 mm ± 3 mm); the runner reducer has a trapezoidal cross-section. The height × average width is (27mm±3mm)×(25mm±3mm); the slag collection bag has a trapezoidal cross-section with a height × average width of (48mm±3mm)×(26mm±3mm); the ingate has a trapezoidal cross-section with a height × average width of (5.5mm±1mm)×(50mm±3mm), wherein the height of the trapezoidal cross-section refers to the vertical distance between the upper and lower bases of the trapezoid, and the average width of the trapezoidal cross-section is the length of the midline of the trapezoid.
6. The brake drum type four-piece HWS static pressure molding casting device according to claim 5, characterized in that, The brake drum model has a maximum outer diameter of 290mm and a maximum height of 325mm; the sprue has a circular cross-section with a diameter of 50mm; the runner has an isosceles trapezoidal cross-section with a height × average width of 28mm × 28mm; the lap joint has an isosceles trapezoidal cross-section with a height × average width of 28mm × 33mm; the runner reducer has an isosceles trapezoidal cross-section with a height × average width of 27mm × 25mm; the slag collection bag has an isosceles trapezoidal cross-section with a height × average width of 48mm × 26mm; and the ingate has an isosceles trapezoidal cross-section with a height × average width of 5.5mm × 50mm.
7. The brake drum type four-piece HWS static pressure molding casting device according to claim 5, characterized in that, The weight of the four-piece HWS static pressure molding casting device for the brake drum is 28KG, the liquid holding capacity of each brake drum model is 65KG, the weight of a single casting box is 288KG, and the casting yield is over 90%.