A three-plate die-casting mold with cellular gating

Abstract

The present invention discloses a three-plate die-casting mold with honeycomb gating, which relates to the technical field of die-casting molds and includes a fixed mold, an intermediate plate, a moving mold, a gating mechanism, a core-pulling mechanism and an ejection mechanism; the gating mechanism includes a gate, a plurality of manifold blocks communicated with the gate, and a plurality of guide columns communicated with the plurality of manifold blocks one by one, and the guide columns are inverted cones; a moving mold core is arranged on the moving mold, a fixed mold core is arranged on the fixed mold, and a cavity with a plurality of feeding ports is formed between the moving mold core and the fixed mold core; vertical guide columns and limit pull rods are arranged on the fixed mold; the core-pulling mechanism includes a slider seat, a tapered lifter inserted into the slider seat, and a core fixed on the slider seat; the input end of the ejection mechanism is connected to a die-casting machine, and the output end is arranged on the second parting surface corresponding to the position of the cavity. The products produced by the present invention have good forming effects, and solve the quality defects of penetration under-casting and shrinkage porosity of die-cast products such as radiators or water tanks.

Description

Technical Field

[0001] The present invention relates to the technical field of die-casting molds, and specifically to a three-plate die-casting mold with honeycomb gating. Background Art

[0002] Die-casting mold is a method of casting liquid die forging, and the manufacturing process is generally completed on a dedicated die-casting forging machine. Its basic process is that the molten metal is first cast into the mold cavity at low speed or high speed. The mold has a movable cavity surface, which is pressurized and forged during the cooling process of the molten metal, eliminating the shrinkage cavity and porosity defects of the blank and making the internal structure of the blank reach the broken grains in the forged state. Therefore, the comprehensive mechanical properties of the blank are significantly improved.

[0003] In recent years, with the rapid development of the new energy vehicle industry, the requirements for the use of aluminum alloys have become higher and higher, and the quality requirements for products have also become more and more strict. The quality of some die-cast products in the production process of new energy vehicles is difficult to control. For example, radiators and water tanks both have fins, and the weight of the fins differs greatly from that of the body structure, and there are few connection positions between the body structure and the fin structure. The existing traditional gating method has only one parting surface, which is located on the side of the casting. The finished products produced by this method are defective, such as penetrative undercasting and shrinkage porosity defects. The common defect is that the top of the casting cannot be effectively filled.

[0004] In a three-plate die-casting mold, the casting and the gating mechanism are in two different parting surface layers, and it is necessary to open two parting surfaces of the mold to separate the gating mechanism and the casting. However, the demolding effect of the existing three-plate die-casting mold is not good. Summary of the Invention

[0005] The present invention discloses a three-plate die-casting mold with honeycomb gating to solve the technical problems of poor finished products and poor demolding effect in some die-cast products.

[0006] To solve the above technical problems, the present invention proposes the following optimized technical solutions:

[0007] A three-plate die-casting mold with honeycomb gating includes a fixed mold, an intermediate plate, a movable mold, a gating mechanism, a core-pulling mechanism, and an ejection mechanism. The gating mechanism is arranged on the fixed mold. A first parting surface is formed between the fixed mold and the intermediate plate, and a second parting surface is formed between the intermediate plate and the movable mold;

[0008] The gating mechanism includes a gate, a plurality of runner blocks communicated with the gate, and a plurality of guide columns respectively communicated with the plurality of runner blocks. The guide columns are inverted cones;

[0009] A moving die core is provided on the moving die, a fixed die core is provided on the fixed die, a cavity with a plurality of feeding ports is formed between the moving die core and the fixed die core, a plurality of flow guiding columns are aligned with the plurality of feeding ports one by one, the upper end surface of the cavity is arranged on the first parting surface, and the lower end surface is arranged on the second parting surface;

[0010] The fixed die is provided with a vertical guide post and a limit pull rod. The vertical guide post is slidably connected to the middle plate and the moving die. A limit hole is provided on the limit pull rod, and a limit post is provided on the middle plate. The limit post is placed in the limit hole;

[0011] The core pulling mechanism includes a slider seat, an inclined guide post inserted into the slider seat, and a core pull fixed on the slider seat. One end of the inclined guide post is fixed on the middle plate, the core pull is arranged in the cavity, and the included angle between the inclined guide post and the slider seat is less than 90 degrees;

[0012] The input end of the ejecting mechanism is connected to a die-casting machine, and the output end is arranged on the second parting surface corresponding to the position of the cavity.

[0013] Further, both the middle plate and the moving die are provided with guide grooves for inserting the vertical guide post, and guide sleeves are provided on the inner walls of the guide grooves.

[0014] Further, a fixing mechanism is further included. The fixing mechanism includes a base and square iron. The base is arranged below the ejecting bottom plate, the square iron is fixed between the base and the moving die, a convex platform is provided at the bottom end of the inner wall of the square iron, and the ejecting bottom plate is placed on the convex platform.

[0015] Further, the fixing mechanism further includes support columns. The support columns penetrate through the ejecting bottom plate and the ejecting top plate and are fixed between the base and the moving die.

[0016] Further, a sprue bush is sleeved outside the sprue, and a cooling ring is sleeved outside the sprue bush.

[0017] Further, the ejecting mechanism includes an ejecting bottom plate, an ejecting top plate fixed on the ejecting bottom plate, and ejecting rods fixed on the ejecting top plate. The ends of the ejecting rods are arranged on the second parting surface corresponding to the position of the cavity.

[0018] Further, the ejecting mechanism further includes a return rod, and the return rod is fixed between the ejecting top plate and the middle plate.

[0019] Further, the inclined guide post is fixed on the middle plate through a pressing block, and the slider seat is provided with a guide hole for the inclined guide post to penetrate through.

[0020] Further, a receiving groove for receiving the slider seat is provided in the middle plate, and a limiting block is provided on the outer wall of the middle plate, and the limiting block is used to close the receiving groove.

[0021] Further, an anti-collapse insert block is provided on the bottom surface of the middle plate.

[0022] The present invention has the following beneficial effects compared with the prior art:

[0023] 1. The flow guiding columns are arranged above the cavity, and a plurality of flow guiding columns are aligned with a plurality of feeding ports of the cavity one by one, so that the cavity can be filled to the greatest extent, and the formed products produced have good forming effects, solving the quality defects of penetration under-casting and shrinkage porosity of die-casting products such as radiators or water tanks;

[0024] 2. The vertical guide columns, limiting pull rods and core-pulling mechanism are provided. When the fixed mold moves upward, since the flow guiding columns are arranged as inverted cones, the flow guiding columns can be easily separated from the middle plate. Driven by the vertical guide columns and limiting pull rods, the middle plate also moves upward. While the middle plate moves upward, the core is pulled out, and the casting is ejected through the ejection mechanism. This method completes demolding more easily and solves the technical defect of poor demolding effect. Description of the Drawings

[0025] Figure 1 is a cross-section of the three-plate die-casting mold of the present invention Figure 1 。

[0026] Figure 2 is a cross-section of the three-plate die-casting mold of the present invention Figure 2 。

[0027] Figure 3 is a schematic structural diagram of the gating mechanism and the casting of the present invention.

[0028] In the figure: 1, fixed mold; 2, middle plate; 3, moving mold; 4, first parting surface; 5, second parting surface; 6, gate; 7, runner block; 8, flow guiding column; 9, moving mold core; 10, fixed mold core; 11, vertical guide column; 12, limiting pull rod; 13, limiting hole; 14, limiting column; 15, slider seat; 16, inclined guide column; 17, core-pulling; 18, guide sleeve; 19, base; 20, square iron; 21, boss; 22, support column; 23, sprue bush; 24, cooling ring; 25, ejection bottom plate; 26, ejection top plate; 27, ejection rod; 28, return rod; 29, limiting block; 30, anti-collapse insert block; 31, casting; 32, screw; 33, pressing block. Detailed Embodiments

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts fall within the scope of protection of this application.

[0030] See Figures 1-3 , a three-plate die-casting mold with cellular gating, including a fixed mold 1, an intermediate plate 2, a moving mold 3, a gating mechanism, a core-pulling mechanism 17, and an ejection mechanism. The fixed mold 1 is fixed on the fixed mold base on one side of the die-casting machine's pressure chamber, the moving mold 3 is fixed on the moving mold base of the die-casting machine, the ejection mechanism is connected to the power output end of the die-casting machine. The gating mechanism is arranged on the fixed mold 1. A first parting surface 4 is formed between the fixed mold 1 and the intermediate plate 2, and a second parting surface 5 is formed between the intermediate plate 2 and the moving mold 3;

[0031] The gating mechanism includes a gate 6, a plurality of manifold blocks 7 communicated with the gate 6, and a plurality of guide columns 8 respectively communicated with the plurality of manifold blocks 7. The gate 6 is connected to the pressure chamber or nozzle of the die-casting machine, and the molten metal flows from the pressure chamber or nozzle into the gate 6. The guide column 8 is an inverted cone. During demolding, the runner is separated from the product by the instant of mold opening, which is more convenient for demolding;

[0032] A moving mold core 9 is arranged on the moving mold 3, a fixed mold core 10 is arranged on the fixed mold 1. A cavity with a plurality of feeding ports is formed between the moving mold core 9 and the fixed mold core 10. The plurality of guide columns 8 are respectively aligned with the plurality of feeding ports. The feeding port is specifically located at the top of the heat sink. The molten metal flows into the cavity from the top down of the guide body, effectively filling the upper part of the casting 31. The upper end surface of the cavity is arranged on the first parting surface 4, and the lower end surface is arranged on the second parting surface 5. The casting 31 formed in the cavity is demolded between the first parting surface 4 and the second parting surface 5;

[0033] Vertical guide columns 11 and limit pull rods 12 are arranged on the fixed mold 1. The vertical guide columns 11 are slidably connected to the intermediate plate 2 and the moving mold 3. The vertical guide columns 11 have the function of connecting the fixed mold 1, the intermediate plate 2, and the moving mold 3, and also have the function of guiding. Limit holes 13 are arranged on the limit pull rods 12, and limit posts 14 are arranged on the intermediate plate 2. The limit posts 14 are placed in the limit holes 13. The cooperation between the limit posts 14 and the limit holes 13 plays a role in limiting the moving range of the fixed mold 1;

[0034] The core-pulling mechanism 17 includes a slider base 15, an inclined guide pillar 16 inserted into the slider base 15, and a core-pulling 17 fixed on the slider base 15. One end of the inclined guide pillar 16 is fixed on the middle plate 2, the core-pulling 17 is arranged in the cavity, and the included angle between the inclined guide pillar 16 and the slider base 15 is less than 90 degrees.

[0035] The input end of the ejection mechanism is connected to the die-casting machine, and the output end is arranged on the second parting surface 5 corresponding to the position of the cavity.

[0036] In the above technical solution, when the fixed die base of the die-casting machine moves upward and the first parting surface 4 separates, the inverted cone separates from the product. Since the gate 6 is connected to the pressure chamber of the fixed die, the fixed die 1 moves upward following the gate 6. During the movement of the fixed die 1, the limit pull rod 12 moves upward, and the limit post 14 limits the fixed die 1 from sliding upward any further from the top of the limit hole 13 to the bottom of the limit hole 13. At this time, the fixed die 1 drives the middle plate 2 to move upward, and the second parting surface 5 separates. Since one end of the inclined guide pillar 16 is fixed on the middle plate 2 and the other end is inserted into the slider base 15 at an angle less than 90 degrees, when the inclined guide pillar 16 moves upward in the slider base 15, the slider base 15 moves to the right, pulling the core-pulling 17 out of the cavity. Then, the die-casting machine provides power to the ejection mechanism to eject the casting 31, completing the demolding of the casting 31.

[0037] It can be understood that there are various specific forms for fixing the limit pull rod 12 and the vertical guide pillar 11 on the fixed die 1, the limit post 14 on the middle plate 2, and the core-pulling 17 on the slider base 15, as long as the fixing function can be achieved. For example, fixing can be done through screws 32 or bolts.

[0038] See Figure 3 , the produced casting 31 has through holes on its side. If the side of the casting 31 has through holes, arc surfaces or undercuts, directly ejecting the product will cause the casting 31 to be stuck on the moving die core 9 and unable to be demolded. The function of the core-pulling mechanism 17 is to solve the problem of demolding when the product has structures such as through holes, arc surfaces or undercuts on its side. Before demolding, the core-pulling 17 is pulled out of the cavity, and then the casting 31 can be normally ejected. It can be understood that the number of core-pulling mechanisms 17 is not limited here, and the specific number of core-pulling mechanisms 17 is determined according to the through holes, arc surfaces and undercut structures on the side of the product.

[0039] Both the middle plate 2 and the moving die 3 are provided with guide grooves for inserting the vertical guide pillar 11, and the inner wall of the guide groove is provided with a guide sleeve 18. When the fixed die 1 moves up and down, friction will occur when the vertical guide pillar 11 slides in the guide groove, and the guide sleeve 18 plays a role in preventing wear caused by contact between the vertical guide pillar 11 and the middle plate 2 and the moving die 3.

[0040] The die-casting mold further includes a fixing mechanism, which includes a base 19 and square iron blocks 20. The base 19 is arranged below the ejector bottom plate 25. The square iron blocks 20 are fixed between the base 19 and the moving mold 3. The square iron blocks 20 play a role in supporting the moving mold 3. A boss 21 is provided at the bottom end of the inner wall of the square iron block 20. The ejector bottom plate 25 is placed on the boss 21. The boss 21 is a structure protruding outward from the inner wall of the square iron block 20, and its upper surface is a plane for carrying the ejector bottom plate 25.

[0041] The fixing mechanism further includes support columns 22. The support columns 22 penetrate through the ejector bottom plate 25 and the ejector top plate 26 and are fixed between the base 19 and the moving mold 3, and are also used to support the moving mold 3 to prevent the middle part of the moving mold 3 from collapsing.

[0042] A sprue bush 23 is sleeved outside the sprue 6. The sprue bush 23 plays a role in connecting and fixing the sprue 6 and the pouring chamber of the die-casting machine. At the same time, it also cools the molten metal. A cooling ring 24 is sleeved outside the sprue bush 23, and the cooling sleeve is used to cool the sprue bush 23.

[0043] The ejector mechanism includes an ejector bottom plate 25, an ejector top plate 26 fixed on the ejector bottom plate 25, and ejector rods 27 fixed on the ejector top plate 26. The end of the ejector rod 27 is arranged on the second parting surface 5 corresponding to the cavity position. The ejector bottom plate 25 is connected to the power output end of the die-casting machine. The power output end of the die-casting machine jacks up the ejector bottom plate 25 upward. The ejector rods 27 eject the casting 31 on the second parting surface 5 to complete the demoulding of the casting 31. It can be understood that there are various choices for the connection methods of the ejector bottom plate 25 and the ejector top plate 26, and the ejector top plate 26 and the ejector rods 27, as long as the fixing effect can be achieved. For example, they can be fixedly connected by screws 32 or bolts.

[0044] The ejector mechanism further includes return rods 28. The return rods 28 are fixed between the ejector top plate 26 and the middle plate 2. The return rods 28 are connected to the die-return mechanism of the die-casting machine. The die-return mechanism presses down on the fixed mold 1 for die pressing to realize the reset of the fixed mold 1 and the middle plate 2. When the middle plate 2 is reset downward, it abuts against the return rods 28. At this time, the return rods 28 are forced to reset downward, and at the same time, the reset of the ejector mechanism is realized.

[0045] The inclined guide pillar 16 is fixed on the middle plate 2 through a pressing block 33. The slider seat 15 is provided with a guide hole for the inclined guide pillar 16 to penetrate. Since the included angle between the inclined guide pillar 16 and the slider seat 15 is less than 90 degrees, this guide hole is also adapted to the inclined guide pillar 16. It can be understood that there are various choices for the connection methods of the pressing block 33 with the middle plate 2 and the inclined guide pillar 16, as long as the fixing effect can be achieved. For example, they can be fixedly connected by screws 32 or bolts.

[0046] The middle plate 2 is provided with a receiving groove for receiving the slider seat 15. The outer wall of the middle plate 2 is provided with a limiting block 29 for closing the receiving groove. When the inclined guide pillar 16 moves upward, the slider seat 15 moves rightward in the receiving groove, and the limiting block 29 is used to limit the sliding range of the slider seat 15 to prevent it from sliding out of the middle plate 2.

[0047] The bottom surface of the middle plate 2 is provided with an anti-collapse insert 30. Since the moving mold 3, the middle plate 2 and the fixed mold 1 are only connected by the vertical guide pillars 11 and there is no other supporting structure, and the molten metal rushes into the cavity from the gate with a certain acceleration, the middle plate may collapse. The anti-collapse insert 30 is used to prevent the middle plate 2 from collapsing.

[0048] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A three-plate die-casting mold with honeycomb gating, comprising a fixed mold, an intermediate plate, a moving mold, a gating mechanism, a core-pulling mechanism and an ejection mechanism. The gating mechanism is arranged on the fixed mold. A first parting surface is formed between the fixed mold and the intermediate plate, and a second parting surface is formed between the intermediate plate and the moving mold. It is characterized in that ； The gating mechanism includes a gate, a plurality of flow splitters communicated with the gate, and a plurality of guiding columns respectively communicated with the plurality of flow splitters. The guiding columns are inverted cones; A moving mold core is provided on the moving mold, and a fixed mold core is provided on the fixed mold. A cavity with a plurality of feeding ports is formed between the moving mold core and the fixed mold core. The plurality of guiding columns are respectively aligned with the plurality of feeding ports. The upper end surface of the cavity is arranged on the first parting surface, and the lower end surface is arranged on the second parting surface; Vertical guide columns and limit pull rods are provided on the fixed mold. The vertical guide columns are slidably connected to the middle plate and the moving mold. Limit holes are provided on the limit pull rods, and limit columns are provided on the middle plate. The limit columns are placed in the limit holes; The core-pulling mechanism includes a slider seat, an inclined guide column inserted into the slider seat, and a core-pulling member fixed on the slider seat. One end of the inclined guide column is fixed on the middle plate. The core-pulling member is arranged in the cavity. The included angle between the inclined guide column and the slider seat is less than 90 degrees; The input end of the ejection mechanism is connected to a die-casting machine, and the output end is arranged on the second parting surface corresponding to the position of the cavity.

2. The three-plate die-casting mold with honeycomb gating according to claim 1, characterized in that, Both the middle plate and the moving mold are provided with guide grooves for inserting the vertical guide columns, and guide sleeves are arranged on the inner walls of the guide grooves.

3. The three-plate die-casting mold with honeycomb gating according to claim 1, characterized in that, The ejection mechanism includes an ejection bottom plate, an ejection top plate fixed on the ejection bottom plate, and ejection rods fixed on the ejection top plate. The ends of the ejection rods are arranged on the second parting surface corresponding to the position of the cavity.

4. A three-plate die-casting mold with cellular gating according to claim 3, characterized in that, A fixing mechanism is further included. The fixing mechanism includes a base and square iron. The base is arranged below the ejection bottom plate. The square iron is fixed between the base and the moving mold. A convex platform is arranged at the bottom end of the inner wall of the square iron. The ejection bottom plate is placed on the convex platform.

5. A three-plate die-casting mold with honeycomb gating according to claim 4, characterized in that, The fixing mechanism further includes support columns, and the support columns penetrate through the ejection bottom plate and the ejection top plate and are fixed between the base and the moving mold.

6. A three-plate die-casting mold with honeycomb gating according to claim 1, characterized in that, A gate sleeve is sleeved outside the gate, and a cooling ring is sleeved outside the gate sleeve.

7. A three-plate die-casting mold with cellular gating according to claim 3, characterized in that, The ejection mechanism further includes return rods, and the return rods are fixed between the ejection top plate and the middle plate.

8. A three-plate die-casting mold with honeycomb gating according to claim 1, characterized in that, The inclined guide column is fixed on the middle plate through a pressing block, and the slider seat is provided with a guide hole for the inclined guide column to penetrate through.

9. A three-plate die-casting mold with honeycomb gating according to claim 1, characterized in that, An accommodation groove for accommodating the slider seat is arranged inside the middle plate, and a limit block is arranged on the outer wall of the middle plate. The limit block is used to close the accommodation groove.

10. A three-plate die-casting mold with cellular gating according to claim 1, characterized in that, An anti-collapse insert is arranged on the bottom surface of the middle plate.

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