A flow channel structure for a die casting mold
By introducing a buffer zone and a dummy finished product cavity into the flow channel of the die-casting mold, the cavity erosion problem was solved, product quality was ensured, flow diversion and buffering effects were achieved, and the production qualification rate was improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-12-28
- Publication Date
- 2026-03-13
AI Technical Summary
During mass production, the cavity structure of existing die-casting molds is easily eroded, resulting in defective products, and the gate area is limited and cannot be enlarged.
Design a die-casting mold runner structure, including a buffer area, a dummy product cavity and a cold runner. The buffer area is thickened near the gate, the dummy product cavity is set side by side with the product cavity, and the bottom is wavy to increase the gate flow rate.
By using buffering and diversion design, the injection speed of the gate is reduced, cavity erosion is avoided, product quality is ensured, and the production qualification rate is improved without increasing the size of the gate.
Smart Images
Figure CN116352049B_ABST
Abstract
Description
[Technical Field]
[0001] This invention relates to the field of die casting mold technology, and in particular to a flow channel structure for a die casting mold. [Background Technology]
[0002] Die casting is a highly efficient, non-cutting metal forming process that has been widely applied in various sectors of the national economy. In addition to automobiles and motorcycles, instruments and meters, and industrial electrical appliances, die castings are also widely used in household appliances, agricultural machinery, radio, communications, machine tools, transportation, shipbuilding, cameras, watches, computers, textiles and other industries. However, the die casting process involves filling a mold with molten metal under high pressure and high speed, and then solidifying it under high pressure to form a casting. To ensure that the casting is formed and meets quality requirements, a certain filling speed is required.
[0003] Please see Figure 1 As shown, Figure 1 A schematic diagram of the runner structure of a die-casting mold in the prior art is shown. The die-casting mold has a runner structure 11, a gate 12, a cavity 13 and an overflow groove 14 arranged in sequence. The cross-sectional area of the gate 12 is relatively small. When the filling speed is switched to high speed, the injection speed at the gate 12 is too high. During mass production, the cavity 13 structure is eroded, and the produced product 10 is unqualified. Usually, the gate 12 is enlarged to improve the erosion. However, due to the structural limitations of the molded product 10, the area that can be used for the gate 12 is small, so it is impossible to enlarge the gate 12.
[0004] In view of this, it is necessary to develop a flow channel structure for die-casting molds to solve the problem that the cavity 13 structure is easily eroded during mass production, resulting in unqualified products 10. [Summary of the Invention]
[0005] Therefore, the purpose of this invention is to provide a flow channel structure for a die-casting mold, which can solve the problem that the products formed by existing die-casting molds have a small area for gates due to structural limitations, and the cavity structure is easily eroded during mass production, resulting in unqualified products.
[0006] To achieve the above objectives, the present invention provides a runner structure for a die-casting mold, the die-casting mold having a runner structure, a gate, a product cavity and an overflow groove arranged in sequence, the runner structure having a buffer area and a dummy product cavity.
[0007] Furthermore, the buffer area can be a thicker runner, located near the gate in the runner structure, which serves to buffer the molten metal before it flows into the product cavity.
[0008] Furthermore, the flow channel structure is provided with a cold flow groove at the end of the molten metal flow.
[0009] Furthermore, the dummy finished product cavity is arranged side by side with the finished product cavity, and the dummy finished product cavity plays a function of diverting flow, thereby indirectly increasing the gate flow rate.
[0010] Furthermore, the bottom of the dummy product cavity is designed to be wavy, so that the molten metal fills the dummy product cavity slightly slower than it fills the product cavity.
[0011] Compared to existing technologies, the flow channel structure of the die-casting mold of the present invention has a cold runner at the end of the molten metal flow channel. Therefore, the cold material entering the mold first will enter the cold runner and will not flow into the product cavity. Due to the buffer area, the molten metal is buffered before flowing into the product cavity. Furthermore, the presence of a dummy product cavity, which is arranged side by side with the product cavity, can divert the flow and indirectly increase the gate flow rate. The bottom of the dummy product cavity is wavy, which buffers the molten metal when it fills the dummy product cavity, so that the filling of the dummy product cavity is slightly slower than the filling of the product cavity. In this way, the problem of product cavity structure being eroded during mass production and the resulting defective products can be solved when the gate flow rate cannot be increased. [Attached Image Description]
[0012] Figure 1 A schematic diagram illustrating the flow channel structure of a die-casting mold in the prior art is shown.
[0013] Figure 2 A schematic diagram illustrating a preferred embodiment of the present invention is shown.
[0014] Figure 3 A schematic diagram from another perspective illustrating the structure of a preferred embodiment of the present invention is shown.
Detailed Implementation Methods
[0015] Please see Figure 2 and Figure 3 As shown, where, Figure 2 The diagram illustrates a preferred embodiment of the present invention. Figure 3 A schematic diagram from another perspective illustrating the structure of a preferred embodiment of the present invention is shown.
[0016] The present invention discloses a runner structure for a die-casting mold. Due to structural limitations, the area available for the gate 120 in the product 100 formed by the die-casting mold is relatively small. The die-casting mold has a runner structure 110, a gate 120, a product cavity 130, and an overflow groove 140 arranged in sequence. The runner structure 110 is provided with a dummy product cavity 131 and a buffer area 132.
[0017] The flow channel structure 110 includes a main flow channel 111, a first branch flow channel 112, a second branch flow channel 113, and a third branch flow channel 114. The main flow channel 111 is connected to the nozzle 150 of the die-casting mold. One end of each of the two first branch flow channels 112 is connected to the main flow channel 111, and the other end forms a molten metal flow end. A cold flow channel 160 is provided at this end. The first branch flow channel 112 branches into two second branch flow channels 113, and the two second branch flow channels 113 further branches into two third branch flow channels 114. The third branch flow channels 114 are connected to the gate 120. A buffer area 132 is located at the connection between the second branch flow channel 113 and the third branch flow channel 114, that is, near the gate 120. The buffer area 132 is used to deepen the flow channel thickness and serves to buffer the molten metal before it flows into the product cavity 130.
[0018] The dummy finished product cavity 131 is arranged side by side with the finished product cavity 130, which can serve as a flow diversion function and indirectly increase the gate flow rate.
[0019] The bottom of the dummy product cavity 131 is designed to be wavy, so that the molten metal fills the dummy product cavity 131 slightly slower than it fills the product cavity 130.
[0020] In summary, after the molten metal flows out of the nozzle 150, the flow is balanced due to the balanced design of the flow channel structure 110. Because the molten metal flow end of the flow channel structure is provided with a cold runner 160, the cold material entering the mold first will enter the cold runner 160 and will not flow into the product cavity 130. The buffer area 132 is provided to buffer the molten metal before it flows into the product cavity 130. Furthermore, the dummy product cavity 131 is provided. The dummy product cavity 131 is set in parallel with the product cavity 130, which can play a function of diverting the flow and indirectly increasing the flow rate of the gate 120. Moreover, the bottom of the dummy product cavity 131 is designed to be wavy, which buffers the molten metal when it fills the dummy product cavity 131, so that the filling of the dummy product cavity 131 is slightly slower than the filling of the product cavity 130. In this way, the problem of the product cavity 130 structure being eroded during mass production and the resulting defective product 100 is solved when the gate 120 cannot be enlarged.
[0021] Compared to existing technologies, the flow channel structure of the die-casting mold of the present invention mainly features a buffer area 132 and a dummy finished product cavity 131 in the flow channel structure 110. This buffers and diverts the molten metal before it flows into the product cavity 130, thereby indirectly increasing the flow rate of the gate 120. This reduces the injection speed at the gate 120 and solves the problem of erosion of the product cavity 130 structure and unqualified products 100 during mass production when the gate 120 cannot be enlarged.
[0022] The technical features of the present invention have been described above in conjunction with specific embodiments. These descriptions are only for explaining the features of the present invention and should not be construed as limiting the scope of protection of the present invention in any way. Based on the explanation herein, those skilled in the art can conceive of other specific embodiments of the present invention without creative effort, and these embodiments will all fall within the scope of protection of the present invention.
Claims
1. A runner structure for a die-casting mold, wherein the area available for a gate is small due to structural limitations in the product formed by the die-casting mold, and the mold comprises a runner structure, a gate, a product cavity, and an overflow groove arranged in sequence, characterized in that, The flow channel structure has a buffer area and a dummy finished product cavity; The dummy finished product cavity is arranged side by side with the finished product cavity. The dummy finished product cavity serves to divert the flow and indirectly increase the gate flow rate.
2. The flow channel structure of a die-casting mold according to claim 1, characterized in that, The buffer area can be a thicker runner, located near the gate in the runner structure. This buffer area serves to buffer the molten metal before it flows into the product cavity.
3. The flow channel structure of a die-casting mold according to claim 1, characterized in that, The flow channel structure has a cold flow groove at the end of the molten metal flow.
4. The flow channel structure of a die-casting mold according to claim 1, characterized in that, The bottom of the dummy product cavity is designed to be wavy, so that the molten metal fills the dummy product cavity slightly slower than it fills the product cavity.
Citation Information
Patent Citations
Reduce finished product surface mark's one six die casting die
CN206083822U
Method of producing die-cast product, and metallic pattern
JP2005138150A