Die-casting one-outlet two-pouring-row structure

Abstract

The invention belongs to the technical field of ultra-low-speed die-casting dies, and particularly relates to a die-casting one-outlet two-pouring row structure. The die-casting one-outlet-two-pouring-row structure comprises a feeding cavity, a discharging cavity and a discharging cavity, wherein the feeding cavity is used for receiving a pouring material; the feeding end of the main runner is communicated with the feeding cavity, and the other end of the main runner is closed; wherein the side wall of the main runner is respectively communicated with a plurality of vertically distributed inner sprues which are used for being connected with corresponding product cavities. By changing the structural design of the pouring row, the inner pouring gates of the pouring row are designed to be vertically arranged, so that the size of the mold is reduced, the mold can be matched with more machines, and the production flexibility is higher; the inner gate is directly connected to the main runner, so that the flowing stroke of molten metal is shorter, the heat protection performance is better, and meanwhile, the filling time of the whole mold can be shortened; and the main runner is thicker, and the sprue is directly lapped on the main runner, so that boost pressure conduction is facilitated, the product yield is increased, and the production and mold cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of ultra-low speed die casting dies, and in particular relates to a die casting one-outlet two-gating structure. Background Art

[0002] In the ultra-low speed die casting process, the molten metal fills the mold cavity at a lower speed, which helps to reduce gas entrapment and oxidation, thereby improving the density and surface quality of the casting. The filling speed is usually controlled between a few millimeters and tens of millimeters per second.

[0003] In ultra-low speed die casting, in order to improve production efficiency, horizontal pouring is usually selected to balance the flow rate of aluminum liquid during the filling process. Such a design will lead to an oversized mold design and a large machine tonnage for the same product, which will result in high casting costs.

[0004] Taking the commonly used one-out-two as an example, the mold pouring scheme usually uses a side-by-side design (such as Figure 1 ), the advantage of this design is that it is convenient for process adjustment, so that the high-speed starting point is at the same position, ensuring that the filling of the two products is as consistent as possible. However, the disadvantages of this pouring scheme are also obvious: the runner distance is long, which wastes aluminum liquid; the runner is too long, the temperature loss is large, and the pressure conduction effect is not good; two products are placed side by side, requiring a larger mold core, resulting in a larger mold and increased costs. Summary of the invention

[0005] The purpose of the present invention is to provide a die-casting one-outlet two-gating structure.

[0006] In order to solve the above technical problems, the present invention provides a die-casting one-outlet two-gating structure, comprising:

[0007] A feed cavity, for receiving casting material;

[0008] The main channel has a feed end connected to the feed cavity and the other end is closed;

[0009] The side walls of the main channel are respectively connected with a plurality of vertically distributed inner gates for connecting corresponding product cavities.

[0010] In one embodiment of the present application, a slag buffer area is provided at the closed end of the main channel;

[0011] The inner gate is distributed between the slag buffer area and the feed end of the main channel.

[0012] In one embodiment of the present application, the main flow channel includes a front face, a back face, and two opposite side walls;

[0013] The front and back sides are planes;

[0014] The side wall is formed by the intersection of two inclined surfaces, and the junctions between the inclined surface and the front and back surfaces are arc transition surfaces.

[0015] In one embodiment of the present application, the vertical draft angles on both sides of the main channel are 3°, and the axial draft angles are 20°;

[0016] The included angle between the front and back sides of the main flow channel is 6°.

[0017] In one embodiment of the present application, the ratio of the cross-sectional area of ​​the feed end of the main channel to the sum of the cross-sectional areas of the outlets of all the inner gates is 1.2:1, and the multiple of the flow-blocking cross-sectional area is 1-1.5 times.

[0018] In one embodiment of the present application, the feed chamber comprises: a cake chamber, a cold material buffer chamber and a transition chamber which are sequentially connected along the flow direction of the casting material;

[0019] The transition chamber is communicated with the feed end of the main channel.

[0020] In one embodiment of the present application, the side wall of the transition cavity is a concave arc.

[0021] In one embodiment of the present application, the ratio of the cross-sectional area at the entrance of the cake cavity to the cross-sectional area at the feed end of the main channel is 3.5:1, and the multiple of the flow-blocking cross-sectional area is 3-4 times.

[0022] In one embodiment of the present application, the top surface of the main channel is an arc surface.

[0023] In one embodiment of the present application, the main channel and the feed cavity are both arranged vertically, and the casting material flows through the feed cavity and the main channel in sequence from bottom to top.

[0024] The beneficial effect of the present invention is that the die-casting one-outlet two-gating structure of the present invention includes: a feed cavity for receiving casting materials; a main channel, whose feed end is connected to the feed cavity and the other end is closed; wherein the side walls of the main channel are respectively connected with a number of vertically distributed inner gates for connecting to the corresponding product cavities. By changing the structural design of the gating, the inner gates of the gating are designed to be arranged vertically, which reduces the size of the mold, enables the mold to match more machines, and makes the production more flexible; the inner gate is directly connected to the main channel, the flow path of the molten metal is shorter, the thermal protection is better, and the filling time of the whole mold can be reduced; the main channel is thicker, and the gate is directly overlapped on the main channel, which is conducive to the conduction of boost pressure, increases product quality, and reduces production and mold costs.

[0025] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a schematic diagram of the existing mold pouring scheme;

[0029] Figure 2 Schematic diagram of the die-casting one-outlet two-gating structure of the present invention;

[0030] Figure 3 It is a three-dimensional diagram of the die-casting one-outlet two-gating structure of the present invention;

[0031] Figure 4 is a three-dimensional diagram of the feed chamber of the present invention;

[0032] Figure 5 is a top view of the main flow channel of the present invention;

[0033] Figure 6 yes Figure 5 Middle AA section view;

[0034] Figure 7 yes Figure 5 Middle BB section view;

[0035] Figure 8 yes Figure 2 CC section view.

[0036] In the figure:

[0037] Feed cavity 1, cake cavity 11, cold material buffer cavity 12, transition cavity 13, main channel 2, feed end 21, closed end 22, slag buffer area 221, front side 201, back side 202, inclined surface 2031, side wall 203, arc transition surface 204, inner gate 3, product cavity 4. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] See also Figure 2 and Figure 3 In one embodiment, the die-casting one-outlet two-gating structure includes: a feed cavity 1 for receiving casting material; a main channel 2, whose feed end 21 is connected to the feed cavity 1 and the other end is closed; wherein the side walls 203 of the main channel 2 are respectively connected with a plurality of vertically distributed inner gates 3 for connecting to the corresponding product cavities 4.

[0040] In this embodiment, the main channel 2 and the feed cavity 1 are both arranged vertically, and the casting material flows through the feed cavity 1 and the main channel 2 in sequence from bottom to top.

[0041] In an application scenario, the casting material flows through the feed cavity 1 and the main channel 2, and then enters the corresponding product cavity 4 from the inner gate 3. In this embodiment, the inner gate 3 is designed to be distributed vertically, which reduces the size of the mold, enables the mold to match more machines, and makes the production more flexible; the gate is directly connected to the side wall 203 of the main channel 2, the flow path of the molten metal is shorter, the thermal protection is better, and the filling time of the entire mold can be reduced.

[0042] Optionally, the closed end 22 of the main channel 2 is provided with a slag buffer area 221 which can be used for collecting cold materials and metal inclusions; the inner gate 3 is distributed between the slag buffer area 221 and the feed end 21 of the main channel 2.

[0043] In this embodiment, the inner gate 3 is directly overlapped on the main channel 2, and the root can be transitioned through a rounded corner (for example, a radius of 2mm) to increase the fluidity of the molten metal. At the same time, in the subsequent boosting stage, the boosting pressure can be transmitted faster. Since there is no branch runner, the time for the molten metal to reach the gate from the material cake will be reduced, and the slow time will be reduced, resulting in a reduction in the filling time of the entire mold. Feedback in production, more products will be produced in the same time, increasing production efficiency while reducing production costs; at the same time, after removing the branch runner, the loss of boosting pressure will also be reduced, and more pressure will be directly transmitted to the product through the inner gate 3, so that the product air entrainment and shrinkage holes are reduced, further increasing the product yield. The main channel 2 is designed to be relatively thick, so that the main channel has a better thermal insulation effect.

[0044] In some embodiments, the gates 3 may be distributed on two opposite sides of the main channel 2, or on two adjacent sides. Of course, they may also be distributed in other tree-like forms.

[0045] See also Figures 5 to 8 The main channel 2 includes a front side 201, a back side 202 and two opposite side walls 203; the front side 201 and the back side 202 are planes; the side wall 203 is formed by the intersection of two inclined surfaces 2031, and the junction between the inclined surface 2031 and the front side 201 and the back side 202 is an arc transition surface 204.

[0046] Optionally, the vertical draft angles on both sides of the main channel 2 are 3°, and the axial draft angle is 20°; the included angle between the front side 201 and the back side 202 of the main channel 2 is 6°.

[0047] Preferably, the ratio of the cross-sectional area of ​​the feed end 21 of the main channel 2 to the sum of the cross-sectional areas of the discharge ports of all the inner gates 3 is 1.2:1, and the multiple of the flow-blocking cross-sectional area is 1-1.5 times.

[0048] See also Figure 4 The feed chamber 1 includes: a cake chamber 11, a cold material buffer chamber 12 and a transition chamber 13 which are sequentially connected along the flow direction of the casting material; the transition chamber 13 is connected to the feed end 21 of the main channel 2.

[0049] Optionally, the side wall of the transition cavity 13 is a concave arc. The radius of the arc may be 6 mm. The design of the transition cavity 13 can improve the fluidity of the molten metal.

[0050] Preferably, the ratio of the cross-sectional area at the entrance of the cake cavity 11 to the cross-sectional area of ​​the feed end 21 of the main channel 2 is 3.5:1, and the multiple of the flow-blocking cross-sectional area is 3-4 times.

[0051] See also Figure 2 Optionally, the top surface of the main channel 2 is an arc surface.

[0052] In an application scenario, such as Figure 1 In the prior art one-out-two side-by-side pouring scheme shown, taking the product length and width dimensions of 160*70 as an example, the length and width dimensions of the mold core are about 500*200mm. However, according to the pouring scheme of the present application, the same one-out-two dimensions can be reduced to 350*250. Calculated based on the same mold core thickness of 100, 13% of the size and weight will be saved, and the mold frame can also be made smaller, which can match more machines.

[0053] In summary, the die-casting one-out-two pouring row structure of the present invention reduces the mold size through the vertical pouring row design, and a smaller machine can be selected to save costs (900T one-out-two can be changed to 400T one-out-two); the gate is directly overlapped on the main channel, which can better transmit pressure and increase product yield; the filling distance is reduced to reduce the burning loss of aluminum liquid during the process, while the heat loss of the mold casting process is minimized, and the casting cycle is the shortest;

[0054] The various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to technical personnel in this field, and their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods.

[0055] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection.

[0056] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0057] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A die-casting one-outlet two-gating structure, characterized in that: include: A feed chamber (1) for receiving casting material; The main channel (2) has a feed end (21) connected to the feed chamber (1) and the other end is closed; The side walls (203) of the main channel (2) are respectively connected with a plurality of vertically distributed inner gates (3) for connecting to corresponding product cavities (4).

2. The die-casting one-outlet two-gating structure according to claim 1, characterized in that: The closed end (22) of the main channel (2) is provided with a slag buffer area (221); The inner gate (3) is distributed between the slag buffer area (221) and the feed end (21) of the main channel (2).

3. The die-casting one-outlet two-gating structure according to claim 1, characterized in that: The main flow channel (2) comprises a front surface (201), a back surface (202) and two opposite side walls (203); The front side (201) and the back side (202) are planes; The side wall (203) is formed by the intersection of two inclined surfaces (2031), and the intersection of the inclined surface (2031) and the front surface (201) and the back surface (202) is an arc transition surface (204).

4. The die-casting one-outlet two-gating structure according to claim 3, characterized in that: The vertical draft angles on both sides of the main channel (2) are 3°, and the axial draft angles are 20°; The included angle between the front side (201) and the back side (202) of the main channel (2) is 6°.

5. The die-casting one-outlet two-gating structure according to claim 1, characterized in that: The ratio of the cross-sectional area of ​​the feed end (21) of the main channel (2) to the sum of the cross-sectional areas of the discharge ports of all the inner gates (3) is 1.2:1, and the multiple of the flow blocking cross-sectional area is 1-1.5 times.

6. The die-casting one-outlet two-gating structure according to claim 1, characterized in that: The feed chamber (1) comprises: a material cake chamber (11), a cold material buffer chamber (12) and a transition chamber (13) which are sequentially connected along the flow direction of the casting material; The transition chamber (13) is in communication with the feed end (21) of the main channel (2).

7. The die-casting one-outlet two-gating structure according to claim 6, characterized in that: The side wall of the transition cavity (13) is a concave arc.

8. The die-casting one-outlet two-gating structure according to claim 6, characterized in that: The ratio of the cross-sectional area at the entrance of the cake cavity (11) to the cross-sectional area of ​​the feed end (21) of the main channel (2) is 3.5:1, and the multiple of the flow-blocking cross-sectional area is 3-4 times.

9. The die-casting one-outlet two-gating structure according to claim 1, characterized in that: The top surface of the main channel (2) is an arc surface.

10. The die-casting one-outlet two-gating structure according to claim 1, characterized in that: The main channel (2) and the feed cavity (1) are both arranged vertically, and the casting material flows through the feed cavity (1) and the main channel (2) in sequence from bottom to top.

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