Three-plate die for die casting

Abstract

The utility model relates to a three-plate die for die casting, which comprises a movable die plate and a fixed die plate which form a casting cavity, a stripper plate is further arranged on the fixed die plate, the stripper plate comprises a feed port used for injecting molten metal, the fixed die plate comprises an inflow port communicated with the casting cavity, the feed port is communicated with the inflow port, and the movable die plate and the fixed die plate are arranged on the movable die plate. The device is characterized in that the device further comprises a cutting mechanism used for cutting off a material cake formed by molten metal in advance at the feeding port and the inflow port, the cutting mechanism comprises a cutting piece adjacent to the material cake and a driving source arranged on the fixed mold plate, and a power output rod of the driving source is connected with the cutting piece; the material cake cutting mechanism has the advantages that the cutting mechanism is arranged, the material cake is cut off in the mode that the cutting piece advances, namely, a traditional pulling and breaking mode is replaced with a cutting-off mode, a casting is prevented from being dragged in the process of pulling and breaking the material cake, the casting quality is improved, and the casting quality is improved. And casting deformation caused in the material cake removing process is effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of metal casting technology, and in particular to a three-plate mold that facilitates the removal of material cakes. Background Technology

[0002] Compared to the traditional two-plate mold, the three-plate mold, in addition to the moving platen driven by the die-casting machine to move and align with the fixed platen to form a casting cavity, also features a movable stripper plate on the fixed platen. For details on the specific structure of the three-plate mold, please refer to the three-plate mold described in Chinese Invention Patent No. ZL201310079320.6 (Authorization Announcement No. CN103121265B).

[0003] In the above mold structure, the inlet for injecting molten metal is located on the stripper plate, and the inlet on the fixed mold plate is connected to the casting cavity. The inlet and the inlet are fluidly connected when the stripper plate and the fixed mold plate are in the same position. Since the molten metal usually leaves a surplus, the excess molten metal will overflow to the inlet to form a cake. The cake is connected to the casting. In the traditional three-plate mold, when the stripper plate and the fixed mold plate are open, the connection between the cake and the casting plate can be forcibly broken by the pulling force when the two are separated.

[0004] Compared to traditional two-plate dies, three-plate dies are more suitable for castings with complex structures and high surface quality requirements. This is reflected in the smaller residual feed marks on the casting surface, and even the ability to achieve seamless forming. However, when the inlet cross-sectional area is large, the following drawbacks still exist: Because traditional three-plate dies remove the feed cake by forcibly pulling it off the connection between the feed cake and the casting, if the connection is too strong, deformation of the casting may occur during the feed cake removal process. Therefore, further improvements to existing three-plate dies are still needed. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a three-plate mold that can avoid deformation of castings during the removal of the slab, in light of the above-mentioned existing technology.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: the three-plate mold for die casting includes a moving template and a fixed template that are joined together to form a casting cavity. The fixed template is also provided with a stripper plate. The stripper plate includes a feed port for injecting molten metal. Correspondingly, the fixed template includes a flow inlet that communicates with the casting cavity. When the fixed template and the stripper plate are joined together, the feed port and the flow inlet are connected.

[0007] The feature is that it further includes a cutting mechanism for cutting off the cake formed by the previously molten metal in the feed port and the inlet. The cutting mechanism includes a cutting member adjacent to the cake and a drive source disposed on the fixed template. The power output rod of the drive source is connected to the cutting member to drive the cutting member forward to cut the cake when the stripper plate moves to the state of opening from the fixed template.

[0008] To enable the cutting element to advance and cut the material cake under the drive of the drive source, preferably, the cutting element includes a connecting end for connecting to the power output rod and an actuating end for cutting the material cake, the actuating end being aligned with the material cake along the length direction of the power output rod. Since the power output rod outputs power along its length, the actuating end of the cutting element for cutting the material cake needs to be aligned with the material cake along the length direction of the power output rod, so that under the drive of the drive source, the power output rod, together with the cutting element, can advance and cut the material cake through the actuating end.

[0009] To enable the actuating end to cut the material cake, preferably, the connecting end extends at least partially along the length of the power output rod towards the material cake to form the actuating end, and the actuating end includes a cutting surface extending from back to front and inclined towards the fixed mold plate. This cutting surface extending from back to front and inclined towards the fixed mold plate on the actuating end gives it a "blade-like" function, thereby replacing the traditional three-plate mold method of "pulling off" the material cake by cutting it off from the front, effectively avoiding the deformation of the casting caused by the pulling process.

[0010] To prevent the cutting component from deviating during its forward movement, preferably, the fixed template is also provided with a guide for guiding the cutting component to move along the length of the power output rod. This guide is provided because the cutting component, after being connected to the power output rod, will have a certain length, and the cutting process will encounter resistance during forward movement. Therefore, under external force, especially with repeated use, there is a possibility of deviation. Once deviation occurs, the cutting component may not be completely cut, or it may even collide with other components on the fixed template, causing damage.

[0011] To enable the guide member to guide the cutting member, preferably, the cutting mechanism further includes a connecting block for connecting the power output rod and the connecting end. Correspondingly, the guide member includes a first wall portion located on one side of the connecting block along its width direction and a second wall portion located on the other side, with a sliding groove formed between the first and second wall portions for the connecting block to slide. In practice, the connecting end of the cutting member can be directly connected to the power output rod, but the inclusion of this connecting block has several advantages: firstly, it facilitates the replacement of the cutting member, which needs to be replaced after multiple cuttings of the material cake; secondly, the cooperation between the connecting block and the guide member facilitates the guiding of the cutting member, and it is also convenient to install other functional components on the connecting block.

[0012] To prevent the cutting component from advancing too far during the cutting of the material cake, preferably, the front sides of the first and second walls facing the stripper plate are connected to form a limiting portion. Correspondingly, at least partially, a protrusion is formed on the connecting block behind the limiting portion. When the driving source drives the cutting component to advance and cut the material cake, the protrusion and the limiting portion abut against each other to restrict the cutting component from continuing to advance. If the cutting component continues to advance after cutting the material cake, it may sometimes collide with other parts of the fixed template, causing damage to the fixed template. Therefore, this protrusion allows a preset distance to be set between the protrusion and the limiting portion, so that the cutting component can only advance this preset distance to precisely cut the material cake.

[0013] To connect the power output rod to the connecting block, preferably, the end of the power output rod protrudes radially outward at least partially to form a flange. Correspondingly, the protrusion has a groove for the flange to engage, and the wall of the groove has an opening for the power output rod to pass through. This design allows the power output rod to pass through the opening, causing the flange to engage inside the groove, preventing the flange from passing through the opening. This connects the power output rod and the connecting block. This connection method is not only structurally simple but also extremely convenient to assemble and disassemble, and it gives the connecting block the three functions of guiding, limiting, and connecting simultaneously.

[0014] To prevent wear on the fixed template during the movement of the cutting component, a friction block is preferably provided between the cutting component and the fixed template to prevent wear on the fixed template. The friction block can be made of a more wear-resistant material than the fixed template, thereby replacing the fixed template in contact with the cutting component, improving the stability of the cutting component when cutting the material cake, and preventing wear on the fixed template.

[0015] Compared with the prior art, the advantages of this utility model are: by providing a cutting mechanism and using a drive source to drive the cutting member forward to cut the material cake, the traditional "pulling" method is replaced by "cutting", so as to avoid pulling the casting during the process of pulling the material cake, and can effectively avoid the deformation of the casting during the process of removing the material cake. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the three-plate mold in an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the three-plate mold structure with the stripper plate in the mold-open state in an embodiment of this utility model;

[0018] Figure 3 This is a cross-sectional structural diagram of the three-plate mold in an embodiment of the present invention;

[0019] Figure 4 This is a cross-sectional view of the three-plate mold from another angle in an embodiment of this utility model;

[0020] Figure 5 This is a schematic diagram of the cutting mechanism in an embodiment of the present invention;

[0021] Figure 6 This is an exploded view of the cutting mechanism in an embodiment of the present invention;

[0022] Figure 7 This is a cross-sectional structural diagram of the cutting mechanism in an embodiment of the present invention;

[0023] Figure 8 This is a schematic diagram of the guide component in an embodiment of the present utility model;

[0024] Figure 9 This is a schematic diagram of the connecting block in an embodiment of the present utility model;

[0025] Figure 10 This is a schematic diagram of the cutting mechanism in its initial state in an embodiment of this utility model;

[0026] Figure 11 This is a schematic diagram of the cutting mechanism in the cutting state in an embodiment of this utility model. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to specific embodiments.

[0028] like Figures 1-9 The diagram shows a preferred embodiment of this utility model. See also... Figure 1 and Figure 4In this embodiment, the three-plate mold for die casting includes a moving plate 11 and a fixed plate 12 that fit together to form a casting cavity C. A stripper plate 13 is also provided on the fixed plate 12. The stripper plate 13 includes an inlet 131 for injecting molten metal. Correspondingly, the fixed plate 12 includes an inlet 121 that communicates with the casting cavity C. When the fixed plate 12 and the stripper plate 13 are engaged, the inlet 131 and the inlet 121 are connected. Therefore, excess molten metal will fill the inlet 121 and the inlet 131 and cool to form a cake A. (See also...) Figures 2-3 The three-plate mold also includes a cutting mechanism 2 for cutting off the cake A formed by the molten metal inlet 131 and the inlet 121. The cutting mechanism 2 includes a cutting member 21 adjacent to the cake A and a drive source 22 provided on the fixed template 12. The power output rod 221 of the drive source 22 is connected to the cutting member 21 to drive the cutting member 21 forward to cut the cake A when the stripper plate 13 moves to the state of opening the mold with the fixed template 12.

[0029] Regarding the specific structure of the cutting mechanism 2, such as Figures 5-7 As shown, the cutting component 21 includes a connecting end 211 for connecting to the power output rod 221 and an actuating end 212 for cutting the material cake A. The actuating end 212 is aligned with the material cake A along the length direction of the power output rod 221, so that when the drive source 22 outputs power along the length direction of the power output rod 221, the power output rod 221 can move forward together with the actuating end 212 of the cutting component 21 to cut the material cake A, or retract back to the initial position. In order for the actuating end 212 to have the ability to "cut" the material cake A, the connecting end 211 extends at least partially along the length direction of the power output rod 221 towards the material cake A to form the actuating end 212, and the actuating end 212 includes a cutting surface N that extends from back to front and is inclined towards the fixed template 12. This cutting surface N acts like a "blade" to cut the material cake A during the removal process, thereby effectively avoiding the situation where the casting is deformed due to the pulling of the material cake A.

[0030] Furthermore, the following points need to be considered during the removal of the material cake A by the cutting mechanism 2: First, the cutting element 21 may deviate due to external forces during its forward movement; second, if the cutting element 21 moves too far, it may damage other components on the fixed template 12; third, if the cutting element 21 directly contacts the fixed template 12, the fixed template 12 will wear down under the repeated forward and backward movement of the cutting element 21. Therefore, the cutting mechanism 2 also includes the following structure to solve the above problems:

[0031] First, such as Figure 8As shown, the fixed template 12 is also provided with a guide 23 for guiding the cutting member 21 to move along the length direction of the power output rod 221. The guide 23 prevents the cutting member 21 from deviating during its forward movement, which could cause collisions and damage to other components on the fixed template 12. Specifically, the cutting mechanism 2 also includes a connecting block 24 for connecting the power output rod 221 and the connecting end 211. Correspondingly, the guide 23 also includes a first wall portion 231 located on one side of the connecting block 24 along its width direction and a second wall portion 232 located on the other side. A groove 233 is formed between the first wall portion 231 and the second wall portion 232 for the connecting block 24 to slide. In fact, the connecting end 211 of the cutting component 21 can be directly connected to the power output rod 221, but the connecting block 24 is provided. On the one hand, it is convenient to replace the cutting component 21. After the cutting component 21 has been cut multiple times, it needs to be replaced. The connecting block 24 makes it more convenient. On the other hand, the connecting block 24 and the sliding groove 233 of the guide component 23 can help guide the cutting component 21. In addition, it is easy to install other functional components on the connecting block 24.

[0032] Secondly, the front sides of the first wall portion 231 and the second wall portion 232 facing the stripper plate 13 are connected to form a limiting portion 234. Correspondingly, a protrusion 241 is formed on the connecting block 24 at least partially protruding behind the limiting portion 234. When the drive source 22 drives the cutting member 21 to move forward and cut the material cake A, the protrusion 241 and the limiting portion 234 abut against each other to restrict the cutting member 21 from moving further forward. Figure 5 As shown, in this embodiment, a preset distance d is maintained between the protrusion 241 and the limiting part 234. In this embodiment, the preset distance d is approximately 72 mm. The protrusion 241 also serves to connect the power output rod 221, as shown below. Figure 9 As shown, the end of the power output rod 221 at least partially protrudes radially outward to form a flange 222. Correspondingly, the protrusion 241 is provided with a groove 242 for the flange 222 to be engaged, and the wall of the groove 242 is provided with an opening 243 for the power output rod 221 to pass through. This design allows the power output rod 221 to pass through the opening 243, so that the flange 222 can be engaged inside the groove 242, and the flange 222 cannot pass through the opening 243. This allows the power output rod 221 to be connected to the connecting block 24. This connection method is not only relatively simple in structure, but also extremely convenient in disassembly and assembly, so that the connecting block 24 simultaneously has the three functions of guiding, limiting, and connecting.

[0033] Finally, a friction block 25 is provided between the cutting component 21 and the fixed template 12 to prevent wear on the fixed template 12. The principle is to avoid wear on the fixed template 12 by having the friction block 25 contact the cutting component 21. The friction block 25 can be made of a more wear-resistant material than the fixed template 12, so that it can replace the fixed template 12 in contact with the cutting component 21, thereby improving the stability of the cutting component 21 when cutting the material cake A, and at the same time avoiding wear on the fixed template 12.

[0034] The specific working process of the cutting mechanism 2 in this embodiment is as follows:

[0035] like Figure 10 As shown, the cutting mechanism 2 is in its initial state at this time, with the actuating end 212 aligned with the material cake A along the length of the power output rod 221; as the drive source 22 drives the power output rod 221 forward, as... Figure 11 As shown, at this time, the cutting member 21 has cut off and removed the cake A. Subsequently, under the action of the drive source 22, the cutting member 21 can retract to return to the initial state.

Claims

1. A three-plate die for die casting, comprising a movable die plate (11) and a fixed die plate (12) which are closed to form a casting cavity (C), the fixed die plate (12) further comprising a stripper plate (13) which comprises an inlet (131) for injecting a metal melt, and the fixed die plate (12) comprises a flow inlet (121) which is in communication with the casting cavity (C), and the inlet (131) and the flow inlet (121) are in communication when the fixed die plate (12) and the stripper plate (13) are closed. characterized in that The die further comprises a cutting mechanism (2) for cutting a cake (A) of the metal melt previously injected through the inlet (131) and the flow inlet (121), the cutting mechanism (2) comprising a cutting member (21) adjacent to the cake (A) and a driving source (22) provided on the fixed die plate (12), a power output rod (221) of the driving source (22) is connected to the cutting member (21) to drive the cutting member (21) to cut the cake (A) when the stripper plate (13) is moved to an open state with the fixed die plate (12).

2. The tri-plate module of claim 1, wherein: The cutting member (21) comprises a connecting end (211) connected to the power output rod (221) and an acting end (212) for cutting the cake (A), the acting end (212) is aligned with the cake (A) along the length direction of the power output rod (221).

3. The tri-plate die of claim 2, wherein: The connecting end (211) extends at least partially along the length direction of the power output rod (221) to form the acting end (212) which comprises a cutting surface (N) extending from back to front and inclined towards the fixed die plate (12).

4. The tri-plate die of claim 3, wherein: The fixed die plate (12) further comprises a guide member (23) for guiding the cutting member (21) to move along the length direction of the power output rod (221).

5. The tri-plate die of claim 4, wherein: The cutting mechanism (2) further comprises a connecting block (24) for connecting the power output rod (221) and the connecting end (211), and the guide member (23) comprises a first wall portion (231) on one side of the connecting block (24) along the width direction and a second wall portion (232) on the other side, and a sliding groove (233) is formed between the first wall portion (231) and the second wall portion (232) for the connecting block (24) to slide.

6. The tri-plate die of claim 5, wherein: The front side of the first wall portion (231) and the second wall portion (232) are connected to form a limiting portion (234) which faces the stripper plate (13), and the connecting block (24) is at least partially protruded to form a protruding portion (241) behind the limiting portion (234), and the protruding portion (241) and the limiting portion (234) are in contact to limit the cutting member (21) from further moving forward when the driving source (22) drives the cutting member (21) to cut the cake (A).

7. The tri-plate die of claim 6, wherein: The end of the power output rod (221) is at least partially outwardly convex to form a flange (222), and correspondingly, the convex portion (241) is provided with a groove (242) for clamping the flange (222), and the wall of the groove (242) is provided with an opening (243) for the power output rod (221) to pass through.

8. The triplate mode according to any one of claims 1 to 7, characterized in that: The cutting member (21) and the fixed mold plate (12) are further provided with a friction block (25) for preventing the fixed mold plate (12) from being worn.

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