High-pressure die-casting pouring row
By setting cold material receiving sections on the sprue and main runner of the high-pressure die casting grate, the problem of cold material and oxide layer entering the mold cavity at the front end of the molten metal is solved, thus improving the product yield.
Patent Information
- Application Number
- CN202423223474.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-25
AI Technical Summary
During high-pressure die casting, cold material and oxide layer are generated at the front end of the molten metal due to the temperature difference in contact with the mold, resulting in cold shuts and oxide inclusions in the product, which affects the product yield.
Design a high-pressure die casting gating system, including a sprue and a main gating system, with a cold material receiving section provided on the sprue and the main gating system to receive oxide inclusions at the front end of the molten metal and reduce their entry into the mold cavity.
By setting cold material receiving sections on the sprue and main gating system, the amount of oxide inclusions at the front end of the molten metal entering the mold cavity is reduced, thereby improving product yield.
Smart Images
Figure CN223642750U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of high-pressure die casting technology, and specifically relates to a high-pressure die casting gating system. Background Technology
[0002] In high-pressure die casting, the runner serves as the channel for the flow of molten metal and plays a crucial role in the industry. Die casting molds are tools used to cast metal parts; the molten metal enters the cavity through the runner and fills it.
[0003] During the process of molten metal moving slowly from the pressure chamber to the gate to prevent air entrapment, the leading edge of the molten metal is constantly in contact with the mold and the cold air inside. Because of the significant temperature difference between the mold and the molten metal, the mold absorbs heat from the molten metal through heat transfer. This causes the molten metal to cool down, resulting in the formation of cold material and an oxide layer at the leading edge. When this cold material and oxide layer enter the mold cavity, they can cause cold shuts and oxide inclusions in the produced product, negatively impacting product yield. Utility Model Content
[0004] The purpose of this invention is to provide a high-pressure die casting gating system to reduce the entry of cold material and oxide layer from the front end of the molten metal into the mold cavity during the high-pressure die casting process.
[0005] To solve the above-mentioned technical problems, this utility model provides a high-pressure die-casting gating system, comprising:
[0006] The feed cake has a feed inlet at its lower end;
[0007] The channel column is connected at its lower end to one side of the upper end of the material cake;
[0008] The main gating system has one end connected to the top of the channel column and the other end equipped with a gating gate; among which...
[0009] The material cake and / or the main gating system are provided with a cold material receiving section.
[0010] In one embodiment of this application, the cold material receiving portion on the cake includes a cake cold material portion disposed on the other side of the upper end of the cake.
[0011] In one embodiment of this application, the cold material section of the material cake is arc-shaped.
[0012] In one embodiment of this application, a first arc-shaped transition surface is provided at the junction of the inner side of the cold material section and the upper end surface of the material cake.
[0013] In one embodiment of this application, the inner edge of the upper end of the cold material section of the material cake is provided with a first rounded chamfer.
[0014] In one embodiment of this application, the draft angle of the outer side of the cold material section of the slab is 2° to 3.5°.
[0015] In one embodiment of this application, the cold slurry receiving section on the main gating system includes a plurality of cold slurry columns and a cold slurry trough.
[0016] In one embodiment of this application, the draft angle of the cold slug column and the cold slug groove is 2° to 3.5°;
[0017] The connection points between the cold sluice column and the cold sluice trough and the main gating system are respectively transitioned by arcs.
[0018] In one embodiment of this application, a second arc-shaped transition surface is provided at the junction of the inner side of the lower end of the channel column and the upper end of the material cake.
[0019] In one embodiment of this application, the ratio of the cross-sectional area of the arc-shaped channel column to the cross-sectional area of the main gating is 1.2:1, and the multiple of the flow-blocking cross-sectional area is 1-1.5 times.
[0020] In one embodiment of this application, the ratio of the cross-sectional area of the feed inlet to the cross-sectional area of the gate of the feed cake is 10 to 15:1, and the multiple of the flow-blocking cross-sectional area is 2 to 4 times.
[0021] In one embodiment of this application, the upper part of the cross-section of the main gating system is a semi-circular surface, the lower end is a plane, and the two sides of the plane transition with the two sides of the semi-circular surface by arcs.
[0022] The beneficial effects of this invention are as follows: the high-pressure die-casting grate of this invention includes: a sprue with a feed inlet at its lower end; a channel column with its lower end connected to one side of the upper end of the sprue; and a main grate with one end connected to the upper end of the channel column and the other end having a gating point; wherein the sprue and / or the main grate are provided with a cold material receiving section. In other words, the high-pressure die-casting grate of this invention designs a cold material receiving section on the sprue and / or the main grate, allowing oxide inclusions at the front end of the molten metal to enter the cold material receiving section, resulting in fewer oxide inclusions entering the mold cavity and thus improving product yield.
[0023] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and the accompanying drawings.
[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description
[0025] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0026] Figure 1 This is a perspective view of a preferred embodiment of the high-pressure die-casting gating system of this utility model;
[0027] Figure 2 This is a top view of a preferred embodiment of the high-pressure die-casting gating system of this utility model;
[0028] Figure 3 This is a side view of a preferred embodiment of the high-pressure die-casting gating system of this utility model;
[0029] Figure 4 yes Figure 3 Cross-sectional view at point AA.
[0030] In the picture:
[0031] Material cake 1, feed inlet 11, material cake cold material section 12, first arc transition surface 121, first rounded chamfer 122, channel column 2, second arc transition surface 21, main runner 3, cold material column 31, cold material groove 32, gate 4. Detailed Implementation
[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0033] See Figure 1 , Figure 2 and Figure 3 In one embodiment, the high-pressure die casting grate includes: a slab 1 with a feed inlet 11 at its lower end; a channel column 2 with its lower end connected to one side of the upper end of the slab 1; and a main grate 3 with one end connected to the upper end of the channel column 2 and the other end provided with a grate 4; wherein the slab 1 and / or the main grate 3 are provided with a cold material receiving part.
[0034] In this embodiment, by designing a cold slurry receiving section on the slurry cake 1 and / or the main gating system 3, during the process of the molten metal flowing from the inlet 11 of the slurry cake 1 to the gating system 4, the oxide inclusions at the front end of the molten metal will enter the cold slurry receiving section, so that fewer oxide inclusions enter the cavity, which can improve the product yield.
[0035] In this embodiment, specifically, the cold material receiving part on the material cake 1 includes a material cake cold material part 12 disposed on the other side of the upper end of the material cake 1.
[0036] Optionally, the cold material section 12 of the material cake is arc-shaped.
[0037] Specifically, in one embodiment, the material cake 1 can be in the shape of a frustum with a larger upper part and a smaller lower part, and its draft angle can be 2° to 3.5°.
[0038] Optionally, a first arc-shaped transition surface 121 is provided at the junction of the inner side of the cold feed section 12 and the upper end surface of the cake 1. This facilitates the smooth entry of oxidized inclusions in the cake 1 into the cold feed section 12.
[0039] Furthermore, the outer surface of the cold material section 12 can be coplanar with the material 1. The draft angle of the outer surface of the cold material section 12 is 2° to 3.5°.
[0040] Furthermore, the inner edge of the upper end of the cold material section 12 is provided with a first rounded chamfer 122. The size of the first rounded chamfer 122 can be 7mm.
[0041] In this embodiment, specifically, the cold slug receiving portion on the main runner 3 includes a plurality of cold slug pillars 31 and cold slug channels 32. Optionally, both the cold slug pillars 31 and the cold slug channels 32 can protrude outward from the outer surface of the main runner 3. The cold slug pillars 31 can be columnar with a draft angle of 2° to 3.5°. The cold slug channels 32 can be strip-shaped with a draft angle of 2° to 3.5°. The connections between the cold slug pillars 31 and the cold slug channels 32 and the main runner 3 are respectively transitioned by arcs; the radius of the arc can be 2mm.
[0042] Furthermore, a second arc-shaped transition surface 21 is provided at the junction of the inner side of the lower end of the channel column 2 and the upper end of the material cake 1.
[0043] Furthermore, the ratio of the cross-sectional area of the arc-shaped channel column 2 to the cross-sectional area of the main gating 3 is 1.2:1, and the multiple of the flow-blocking cross-sectional area is 1-1.5 times.
[0044] Furthermore, the ratio of the cross-sectional area of the feed inlet 11 of the cake 1 to the cross-sectional area of the gate 4 is 10 to 15:1, and the multiple of the flow-blocking cross-sectional area is 2 to 4 times.
[0045] See Figure 4The main runner 3 has a semi-circular upper section and a lower section that tends towards an inverted trapezoidal shape. Specifically, the main runner 3 has a semi-circular upper section and a flat lower section, with the two sides of the flat section transitioning to the two sides of the semi-circular section by arcs, the size of which can be 15mm. The draft angle of the lower part of the main runner 3 can be 30-35°.
[0046] In summary, by designing a cold slug receiving section on the slug cake 1 and / or the main runner 3, due to the slow flow rate of the molten metal during the slow process (e.g., 0.25 m / s), some of the oxide inclusions and cold material at the front end of the molten metal will first enter the cold slug section 12 on the slug cake 1. This is because the molten metal at the front end is the first to contact the mold surface, so the cold material and oxide inclusions at the front end are the most abundant. Then, when the molten metal enters the main runner 3, the cold material and oxide inclusions at the front end of the molten metal will gradually enter the cold slug groove 32 and cold slug column 31 on the main runner 3 during its forward movement, thereby minimizing the cold material and oxide inclusions at the front end of the molten metal before it enters the gating 4.
[0047] All the devices (parts whose specific structures are not specified) selected in this application are general standard parts or parts known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.
[0048] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly, for example, they can be fixed connections, detachable connections, or integral connections.
[0049] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0050] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.
Claims
1. A high-pressure die-casting gating system, characterized in that, include: The material cake (1) has a feed inlet (11) at its lower end. The lower end of the channel column (2) is connected to one side of the upper end of the material cake (1); The main gating system (3) has one end connected to the upper end of the channel column (2) and the other end equipped with a gating gate (4); wherein The material cake (1) and / or the main gating system (3) are provided with a cold material receiving section.
2. The high-pressure die-casting gating system according to claim 1, characterized in that, The cold material receiving part on the cake (1) includes a cake cold material part (12) disposed on the other side of the upper end of the cake (1).
3. The high-pressure die-casting gating system according to claim 2, characterized in that, The cold material section (12) of the material cake is arc-shaped.
4. The high-pressure die-casting gating system according to claim 2, characterized in that, A first arc-shaped transition surface (121) is provided at the junction of the inner side of the cold material section (12) and the upper end surface of the material cake (1).
5. The high-pressure die-casting gating system according to claim 2, characterized in that, The inner edge of the upper end of the cold material section (12) of the material cake is provided with a first rounded chamfer (122).
6. The high-pressure die-casting gating system according to claim 2, characterized in that, The draft angle of the outer side of the cold material section (12) of the material cake is 2° to 3.5°.
7. The high-pressure die-casting gating system according to claim 1, characterized in that, The cold material receiving section on the main gating system (3) includes several cold material columns (31) and cold material troughs (32).
8. The high-pressure die-casting gating system according to claim 7, characterized in that, The draft angle of the cold slug column (31) and the cold slug groove (32) is 2° to 3.5°; The connection points of the cold sluice column (31) and the cold sluice trough (32) with the main gating system (3) are respectively connected by arc transitions.
9. The high-pressure die-casting gating system according to claim 1, characterized in that, A second arc-shaped transition surface (21) is provided at the junction of the inner side of the lower end of the channel column (2) and the upper end of the cake (1).
10. The high-pressure die-casting gating system according to claim 1, characterized in that, The ratio of the cross-sectional area of the channel column (2) to the cross-sectional area of the main gating system (3) is 1.2:1, and the multiple of the flow-blocking cross-sectional area is 1-1.5 times.
11. The high-pressure die-casting gating system according to claim 1, characterized in that, The ratio of the cross-sectional area of the feed inlet (11) of the feed cake (1) to the cross-sectional area of the gate (4) is 10 to 15:1, and the multiple of the flow-blocking cross-sectional area is 2 to 4 times.
12. The high-pressure die-casting gating system according to claim 1, characterized in that, The upper part of the cross section of the main gating channel (3) is a semi-circular surface, and the lower end is a plane, with the two sides of the plane transitioning to the two sides of the semi-circular surface by arcs.