Three-cavity mold runner structure

Abstract

A three-cavity mold runner structure, comprising a male mold (1) and a female mold (1'). The male mold and the female mold are provided with a male mold core (11) and a female mold core (11'), respectively; a first cavity (111), a second cavity (112) and a third cavity (113) are provided in the male mold core and the female mold core; the first cavity and the second cavity are linearly arranged, and the placement direction of the third cavity is perpendicular to the placement direction of the first cavity and the second cavity; core-pulling mechanisms (12) are respectively provided on two ends of each of the three cavities; the male mold is provided with a distributor (13), in which a first distributor runner (151) and a second distributor runner (152) are formed, and the distributor is arranged among the three cavities; and the male mold is provided with a forming runner (14), the forming runner connects the three cavities, and gates of the three cavities are at the same position relative to products. The runner structure increases the material yield of the products, and can facilitate production and processing of the products.

Description

Three-cavity mold flow channel structure

[0001] This application claims priority to Chinese Patent Application No. 202410985031.0, filed on July 23, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of casting mold mechanism technology, such as a three-cavity mold flow channel structure. Background Technology

[0003] Figure 1 shows a shaft product 70. Due to assembly reasons, the head 71 and tail 72 of this shaft product 70 are generally provided with cavities or undercuts. Therefore, a core-pulling structure needs to be set in the head 71 and tail 72 of the product 70. For this type of product 70 structure, when designing it as a three-cavity mold, the flow channel is usually extended to avoid the core-pulling mechanism, which leads to a decrease in the yield of the product. Secondly, an excessively long flow channel is not conducive to the heat preservation and pressure preservation of the product, and is prone to the generation of burrs and other phenomena. Summary of the Invention

[0004] To improve the low yield of three-cavity mold products caused by interference between the core-pulling mechanism and the runner, this application provides a runner structure for a three-cavity mold.

[0005] This application provides a three-cavity mold runner structure, including a male mold and a female mold. The male mold and the female mold are provided with a male mold core and a female mold core, respectively. The male mold core and the female mold core contain a first cavity, a second cavity, and a third cavity, each configured to mold the same product. The first cavity, the second cavity, and the third cavity are located on the same plane. The first cavity and the second cavity are arranged linearly in sequence. The placement direction of the third cavity is perpendicular to the placement direction of either the first cavity or the second cavity. The two ends of the first cavity are respectively provided with a core-pulling mechanism and a core-pulling mechanism. The core-pulling mechanism is provided at both ends of the cavity, and the core-pulling mechanism is provided at both ends of the third cavity; the male mold is provided with a flow divider, which is configured to separate the main channel and form a first flow divider channel and a second flow divider channel, and the flow divider is disposed between the first cavity, the second cavity and the third cavity; the male mold is provided with a molding channel, which is connected to the first flow divider channel and the second flow divider channel respectively, and the molding channel is connected to the first cavity, the second cavity and the third cavity respectively, and the injection ports of the first cavity, the second cavity and the third cavity are in the same position relative to the product.

[0006] For example, the forming flow channel includes a first flow channel and a second flow channel, the first flow channel connecting the first cavity and the second cavity, and the second flow channel connecting the third cavity and the flow divider.

[0007] For example, the glue inlet includes a first glue inlet, the first flow channel includes a main flow section, a first branch flow section, and a second branch flow section, the starting end of the main flow section is connected to the first branch flow channel, the end of the main flow section is connected to the starting ends of the first branch flow section and the second branch flow section respectively, and the end of the first branch flow section and the second branch flow section are respectively provided with a first glue inlet.

[0008] For example, a first ejector pin is provided at the first glue inlet and the end of the main stream section, a first ejector pin cold material well is provided at the connection between the first ejector pin and the first glue inlet, and the first ejector pin cold material well is provided at the end of the main stream section.

[0009] For example, the first diversion section and the second diversion section are respectively provided with a first cold material well at the middle and the end.

[0010] For example, the glue inlet includes a second glue inlet, the end of the second flow channel is provided with a second glue inlet, the second glue inlet is provided with a second ejector pin, and a second ejector pin cold material well is provided at the connection between the second ejector pin and the second glue inlet.

[0011] For example, a second cold material well is provided at the end of the second branch channel.

[0012] For example, the first sub-channel and the second sub-channel are respectively provided with a third ejector pin, and a third ejector pin cold slug well is provided at the connection between the third ejector pin and the first sub-channel.

[0013] For example, the distributor and the male mold core are detachably connected. Attached Figure Description

[0014] Figure 1 is a three-dimensional structural diagram of shaft-type products in related technologies;

[0015] Figure 2 is a schematic diagram of the flow channel structure provided in an embodiment of this application;

[0016] Figure 3 is another schematic diagram of the flow channel structure provided in an embodiment of this application;

[0017] Figure 4 is a perspective view of a diverter provided in an embodiment of this application;

[0018] Figure 5 is another schematic diagram of the flow channel structure provided in an embodiment of this application;

[0019] Figure 6 is a magnified view of a portion of region A in Figure 5;

[0020] Figure 7 is a magnified view of region B in Figure 5;

[0021] Figure 8 is a magnified view of region C in Figure 5;

[0022] Figure 9 is a three-dimensional structural diagram of the flow channel structure provided in the embodiment of this application.

[0023] Reference numerals: 1', Female mold; 11', Female mold core; 1, Male mold; 11, Male mold core; 111, First cavity; 112, Second cavity; 113, Third cavity; 12, Core pulling mechanism; 13, Runner; 14, Molding runner; 141, First runner; 1411, Main runner section; 1412, First branch runner section; 1413, Second branch runner section; 142, Second runner; 143, First slug inlet; 144, First ejector pin; 145, First ejector pin cold slug well; 146, First cold slug well; 147, Second slug inlet; 148, Second ejector pin; 149, Second ejector pin cold slug well; 1410, Second cold slug well; 15. Main channel; 151. First branch channel; 152. Second branch channel; 153. Third ejector pin; 154. Third ejector pin cold slug well. Detailed Implementation

[0024] As shown in Figures 2, 3, and 9, this application provides a three-cavity mold flow channel structure, including a male mold 1 and a female mold 1'. The male mold 1 and the female mold 1' are provided with a male mold core 11 and a female mold core 11'. The male mold core 11 and the female mold core 11' are provided with a first cavity 111, a second cavity 112, and a third cavity 113, which are configured to form the same product. The first cavity 111, the second cavity 112, and the third cavity 113 are respectively configured to form the same product, and the first cavity 111, the second cavity 112, and the third cavity 113 are on the same plane, that is, the parting surfaces of the three cavities are on the same plane. The first cavity 111 and the second cavity 112 are arranged linearly in sequence. The placement direction of the third cavity 113 is perpendicular to the placement direction of the first cavity 111 or the second cavity 112. The two ends of the first cavity 111, the second cavity 112, and the third cavity 113 are provided with core-pulling mechanisms 12.

[0025] As shown in Figures 4 and 5, the male mold 1 is provided with a flow divider 13. The flow divider 13 is configured to separate the main flow channel 15 and form a first flow divider channel 151 and a second flow divider channel 152. The second flow divider channel 152 extends towards the parting surface, and the part extending on the parting surface continues to extend along the periphery of the flow divider 13 towards the third cavity 113. The flow divider 13 is located between the first cavity 111, the second cavity 112 and the third cavity 113. This design greatly reduces the selection of mold size and ensures that the mold frame size of a three-cavity mold can be adapted to a 125T cold chamber machine. As shown in Figures 5 and 6, the first sub-flow channel 151 and the second sub-flow channel 152 are respectively provided with a third ejector pin 153. The connection between the third ejector pin 153 and the first sub-flow channel 151 and the second sub-flow channel 152 is provided with a third ejector pin cold slug well 154. The sub-flow channel 13 and the male mold core 11 are detachably connected. This application changes the product arrangement and, in conjunction with the sub-flow channel 13 dividing the main flow channel 15, moves the cavities that would interfere with the flow channel in the relevant design, so that the two do not interfere with each other. At the same time, by designing the sub-flow channel 13 to divide the main flow channel 15, the product molding requirements are met, and the yield is maximized.

[0026] As shown in Figures 2, 3, and 5, the male mold 1 is provided with a molding flow channel 14, which connects the first cavity 111, the second cavity 112, and the third cavity 113 respectively. The injection ports of the first cavity 111, the second cavity 112, and the third cavity 113 are in the same position relative to the product. The molding flow channel 14 includes a first flow channel 141 and a second flow channel 142. The first flow channel 141 connects the first cavity 111 and the second cavity 112, and the second flow channel 142 connects the third cavity 113.

[0027] As shown in Figures 5, 7, and 8, the first flow channel 141 includes a main flow section 1411. The starting end of the main flow section 1411 is connected to the first branch flow channel 151. The ending ends of the main flow section 1411 are respectively connected to the starting ends of the first branch flow section 1412 and the second branch flow section 1413. A first inlet 143 is provided at the end of both the first inlet 143 and the end of the main flow section 1411. A first ejector pin 144 is provided at the connection between the first ejector pin 144 and the first inlet 143, and at the end of the main flow section 1411. A first ejector pin cold slug well 145 is provided at both the middle and end of the first branch flow section 1412 and the second branch flow section 1413. A first cold slug well 146 is provided at both the middle and end of the first branch flow section 1412 and the second branch flow section 1413. The second flow channel 142 has a second inlet 147 at its end, a second ejector pin 148 at its second inlet 147, and a second ejector pin cold slug well 149 at the connection between the second ejector pin 148 and the second inlet 147. The second branch flow channel 152 has a second cold slug well 1410 at its end.

[0028] The mold with this structure is installed in a 125T cold chamber machine and formed by the cold chamber machine. The injection speed at the gate is 30-40m / s and the melting temperature is 660℃.

[0029] During use, the molding material flows in from the gate, is divided by the flow divider 13, and enters the first flow divider channel 151 and the second flow divider channel 152 respectively. When flowing through the beginning of the first flow divider channel 151 and the middle of the second flow divider channel 152, the third ejector cold slug well 154 collects the molten material before it enters the first cavity 111, the second cavity 112, and the third cavity 113. When flowing into the first flow channel 141, the molding material first enters the first ejector cold slug well 145 on the main flow section 1411, where it collects the cold material before it is about to be divided. Then the molding material enters the first flow divider section 1412 and the second flow divider channel 152. In the flow divider section 1413, the first cold slug well 146 at its middle section collects the cold slug in the middle, and the first cold slug well 146 at the end of the first flow divider section 1412 and the second flow divider section 1413 collects the cold slug at the end. The first ejector cold slug well 145 at the first inlet 143 collects the cold slug at the first inlet 143. When flowing into the second flow channel 142, the molding material will flow through the second flow channel 142 and the second cold slug well 1410 at the end of the second flow divider sub-flow channel 152, and then flow into the second ejector cold slug well 149 at the second inlet 147. The design of the ejector cold slug well facilitates the ejection of waste material. This design can balance the cold slug area in the entire flow channel.

[0030] This pouring method effectively improves the yield.

[0031] The formula for calculating the yield is: Total product weight / (Total product weight + weight of waste material in the flow channel and slag bag).

[0032] Calculations show that the yield of a three-cavity mold is greater than or equal to 6%-8% compared to a two-cavity mold.

[0033] This application improves the product yield by changing the product arrangement and flow channel design, while also facilitating product production and processing. It avoids the situation where the flow channel is too long due to the need to avoid the core-pulling structure in conventional designs. In addition, the multiple core-pulling mechanisms 12 in this application are all set independently, and there is no interference between the multiple components.

Claims

1. A three-cavity mold runner structure, comprising a male mold and a female mold, wherein the male mold and the female mold are respectively provided with a male mold core and a female mold core, the male mold core and the female mold core are respectively provided with a first cavity, a second cavity and a third cavity configured to form a product, the first cavity, the second cavity and the third cavity are configured to form the same product, and the first cavity, the second cavity and the third cavity are in the same plane, the first cavity and the second cavity are linearly arranged in sequence, the third cavity is arranged in a direction perpendicular to the first cavity or the second cavity, the two ends of the first cavity are respectively provided with a core pulling mechanism, the two ends of the second cavity are respectively provided with the core pulling mechanism, and the two ends of the third cavity are respectively provided with the core pulling mechanism. The male mold is provided with a flow divider, the flow divider is configured to separate a main runner and form a first flow divider runner and a second flow divider runner, and the flow divider is arranged between the first cavity, the second cavity and the third cavity. The male mold is provided with a forming runner, the forming runner is connected to the first flow divider runner and the second flow divider runner, the forming runner is connected to the first cavity, the second cavity and the third cavity, and the glue inlet of the first cavity, the second cavity and the third cavity is arranged at the same position relative to the product.

2. A three-cavity mold runner structure as defined in claim 1, wherein, The forming runner comprises a first runner and a second runner, the first runner is connected to the first cavity and the second cavity, and the second runner is connected to the third cavity and the flow divider.

3. A three-cavity mold runner structure as defined in claim 2 wherein, The glue inlet comprises a first glue inlet, the first runner comprises a main flow section, a first branch flow section and a second branch flow section, the starting end of the main flow section is communicated with the first flow divider runner, the ending end of the main flow section is connected to the starting end of the first branch flow section and the second branch flow section, and the ending end of the first branch flow section and the second branch flow section is respectively provided with the first glue inlet.

4. A three-cavity mold runner structure as defined in claim 3 wherein, The ending end of the main flow section and the first glue inlet are respectively provided with a first ejector pin, the connection position between the first ejector pin and the first glue inlet is provided with a first ejector pin cold material well, and the ending end of the main flow section is provided with the first ejector pin cold material well.

5. A three-cavity mold runner structure as defined in claim 3 wherein, The middle end and the ending end of the first branch flow section and the second branch flow section are respectively provided with a first cold material well.

6. A three-cavity mold runner structure as defined in claim 2 wherein, The glue inlet comprises a second glue inlet, the ending end of the second runner is provided with the second glue inlet, the second glue inlet is provided with a second ejector pin, and the connection position between the second ejector pin and the second glue inlet is provided with a second ejector pin cold material well.

7. A three-cavity mold runner structure as defined in claim 2 wherein, The ending end of the second flow divider runner is provided with a second cold material well.

8. A three-cavity mold runner structure as defined in claim 1 wherein, The first flow divider runner and the second flow divider runner are respectively provided with a third ejector pin, the connection position between the third ejector pin and the first flow divider runner is provided with a third ejector pin cold material well, and the connection position between the third ejector pin and the second flow divider runner is provided with the third ejector pin cold material well.

9. A three-cavity mold runner structure as defined in claim 1 wherein, The flow divider and the male mold core are detachably connected.

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