Handle die-casting die

Abstract

The invention relates to the technical field of handle production, and discloses a handle die-casting die which comprises a fixed die set, a movable die set, an insert mechanism and an ejection mechanism. The fixed die set comprises a fixed die frame and a fixed die core installed on the fixed die frame. The movable die set comprises a movable die frame and a movable die core installed on the movable die frame. Each of the fixed mold core and the movable mold core is provided with a shunting channel, a cavity, an overflow channel and an overflow cavity which are communicated in sequence; the overflow channel is positioned at one end of the cavity away from the shunting channel; communicating holes penetrating through the movable die set in the die opening and closing direction are formed in the inner wall of the flow dividing channel and the inner wall of the overflow cavity of the movable die set; the insert mechanism is arranged between the fixed module and the movable module; the ejection mechanism comprises a base, a movable seat and an ejection piece mounted on the movable seat; the base is connected to the end, away from the fixed mold frame, of the movable mold frame, the movable base moves on the base in the mold opening and closing direction, and the ejection pieces correspond to the communicating holes one to one and slide in the corresponding communicating holes. According to the invention, the superior product rate of finished products can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of handle production, and in particular to a handle die-casting mold. Background Art

[0002] The method of forming a handle die-casting part using a die-casting mold is that molten metal is injected into the mold, and after cooling and solidification, a casting with the required shape is formed. Subsequently, the moving mold of the mold separates from the fixed mold, and then the ejector pin ejects the casting out of the fixed mold under the drive of the driving part.

[0003] Currently, the through holes for the ejector pins to move in the mold are usually opposite to the cavity, so that corresponding ejector pin marks or convex structures will be formed on the surface of the casting after it is formed. It also causes flash or burrs to be generated on the surface of the casting opposite to the ejector pins, which need to be cut and polished in subsequent processing steps. However, since the marks are located on the surface of the casting, the polishing is difficult, and it is easy to over-polish or under-polish during polishing, affecting the smoothness of the casting surface. This not only makes the technical dependence on the polishing operator relatively strong, but also has an adverse effect on the excellent product rate of the finished product. Summary of the Invention

[0004] In order to improve the excellent product rate of the finished product, the present application provides a handle die-casting mold.

[0005] The present application provides a handle die-casting mold, adopting the following technical solution: A handle die-casting mold includes: A fixed mold set, a moving mold set, an insert mechanism, and an ejection mechanism; The fixed mold set includes a fixed mold frame and a fixed mold core installed on the fixed mold frame; the moving mold set includes a moving mold frame and a moving mold core installed on the moving mold frame; both the fixed mold core and the moving mold core have a shunt channel, a cavity, an overflow channel, and an overflow cavity that are sequentially connected; the overflow channel is located at one end of the cavity away from the shunt channel; the moving mold set is provided with communication holes that penetrate the moving mold set along the mold opening and closing direction on the inner wall of the shunt channel and the inner wall of the overflow cavity; The insert mechanism is arranged between the fixed mold set and the moving mold set, and includes a core that extends into the cavity. When the moving mold core separates from the fixed mold core, the core disengages from the casting; The ejection mechanism includes a base, a movable seat, and an ejection member installed on the movable seat; the base is connected to one end of the moving mold frame facing away from the fixed mold frame, the movable seat moves along the mold opening and closing direction on the base, and the ejection members correspond to the communication holes one by one and slide in the corresponding communication holes.

[0006] By adopting the above technical solution, the ejector of the ejection mechanism is arranged in the communication hole between the shunt channel and the overflow cavity, avoiding the ejector pin marks on the surface of the casting, reducing the complexity of the subsequent grinding process, and improving the smoothness and high-quality product rate of the finished product.

[0007] Optionally, an annular step extending along the circumferential direction of the cavity is formed between the fixed mold core and the movable mold core between the cavity and the overflow channel, and the end face of the annular step faces the cavity.

[0008] By adopting the above technical solution, the design of the annular step reduces the diameter of the waste at the end of the casting, facilitating subsequent cutting operations and improving the separation efficiency of the waste and the casting.

[0009] Optionally, each cavity corresponds to two overflow cavities, and the two overflow cavities are respectively located on the opposite sides of the corresponding cavity.

[0010] By adopting the above technical solution, the setting of the two overflow cavities optimizes the flow and exhaust effect of the molten metal.

[0011] Optionally, the size of the overflow channel gradually increases in the direction close to the overflow cavity.

[0012] By adopting the above technical solution, the gradually increasing size of the overflow channel forms a weak point, making the waste easier to cut and further simplifying the subsequent processing procedure.

[0013] Optionally, the movable mold core is provided with a first exhaust channel at one end of the overflow cavity away from the overflow channel, and the first exhaust channel communicates to the outside of the movable mold core.

[0014] By adopting the above technical solution, the setting of the first exhaust channel effectively discharges gas, reduces molding defects such as air holes, and improves the quality of the casting.

[0015] Optionally, the insert mechanism further includes a sliding seat and an inclined guide pillar; the sliding seat slides on the movable mold frame along the direction perpendicular to the mold opening and closing direction, and the core is installed on the sliding seat; the inclined guide pillar is connected to the fixed mold frame, and the inclined guide pillar simultaneously passes through the sliding seat obliquely and slidably in the direction inclined to the sliding direction of the sliding seat; when the movable mold set moves away from the fixed mold set along the mold opening and closing direction, the inclined guide pillar pushes the sliding seat and the core to move away from the casting.

[0016] By adopting the above technical solution, the cooperation of the inclined guide pillar and the sliding seat realizes the automatic demolding of the core, improving the mold opening efficiency and the stability of the casting demolding.

[0017] Optionally, the ejector includes a ejector rod, a end head and an elastic part; the ejector rod is arranged on the movable seat, and one end of the ejector rod away from the movable seat extends into the corresponding communication hole; the end head is sleeved on one end of the ejector rod away from the movable seat and can move relative to the ejector rod along the extending direction of the communication hole, and one end of the end head away from the ejector rod includes a tapered section with an outer diameter gradually increasing in a direction away from the ejector rod, and the end of the communication hole away from the movable seat has an enlarged hole section adapted to the tapered section; the elastic part is connected to the end head and gives the end head an elastic force to move towards the movable seat and press against the inner wall of the enlarged hole section.

[0018] By adopting the above technical solution, the tapered section of the ejector cooperates with the enlarged hole section to improve the sealing performance, so that the molten metal is not easy to leak.

[0019] Optionally, the elastic part is connected with a moving part, the moving part is located between the end head and the elastic part, the elastic part is magnetically attracted to the end head through the moving part, and the moving die module is provided with a limiting part in the communication hole for the end of the moving part away from the end head to abut against, so that when the end head is located in the enlarged hole section, the moving part is within the magnetic attraction range of the end head.

[0020] By adopting the above technical solution, the magnetic attraction of the moving part to the end head facilitates the separation of the end head from the moving part for replacement.

[0021] Optionally, the moving die frame has a mounting plate, and convex columns corresponding to the ejector rods one by one are arranged on the mounting plate, and sliding grooves for the convex columns to enter are formed on the ejector rods; The sliding groove includes a straight section and an inclined section that are sequentially communicated in a direction close to the movable seat. The straight section extends along the length direction of the ejector rod, and the inclined section extends obliquely along the circumferential direction of the ejector rod; during the process of the movable seat moving towards the mounting plate, the convex column slides from the straight section to the inclined section.

[0022] By adopting the above technical solution, the cooperation between the convex column and the inclined section enables the end head and the casting to be rotationally demolded, so as to improve the separation efficiency of the end head and the casting.

[0023] Optionally, push rods corresponding to the convex columns one by one are rotatably connected to the mounting plate. One end of the push rod has an abutting part that abuts against the convex column. The outer periphery of the abutting part reciprocally undulates along its own circumference. The other end of the push rod slides on the movable seat along the mold opening and closing direction; The movable seat has a guiding convex that abuts against the push rod, and a spiral groove for the guiding convex to enter is formed on the outer periphery of the push rod.

[0024] By adopting the above technical solution, the spiral groove design of the push rod and the guiding convex realizes the reciprocating knocking of the convex column, assisting the separation of the casting from the end head and improving the demolding efficiency.

[0025] In summary, the present application includes at least one of the following beneficial effects: 1. By arranging the ejector in the communication hole between the shunt channel and the overflow cavity, it avoids the traces or protrusions left by the traditional ejector pin on the surface of the casting, reduces the subsequent grinding process, and improves the surface quality of the casting. 2. The cooperation between the convex column and the inclined section drives the ejector rod to rotate, and at the same time, the push rod knocks on the ejector rod to assist the separation of the end head and the casting. Description of the Drawings

[0026] Figure 1 is a schematic structural diagram of an embodiment of the present application; Figure 2 is a schematic structural diagram of the fixed mold set in the embodiment of the present application; Figure 3 is a schematic structural diagram of the moving mold set in the embodiment of the present application; Figure 4 is a schematic structural diagram of the finished casting in the embodiment of the present application; Figure 5 is a schematic structural diagram of the moving mold core in the embodiment of the present application; Figure 6 is Figure 5 an enlarged structural diagram at A in Figure 7 is a perspective view when the mold is opened in the embodiment of the present application; Figure 8 is Figure 3 a sectional view taken along line B-B in Figure 9 is Figure 8 an enlarged structural diagram at C in Figure 10 is Figure 8 an enlarged structural diagram at D in Figure 11 is a schematic structural diagram of the cooperation between the ejector rod and the end head in the embodiment of the present application.

[0027] Description of reference numerals: 1, fixed mold frame; 2, fixed mold core; 3, movable mold frame; 4, movable mold core; 5, shunt channel; 6, cavity; 7, overflow channel; 8, overflow cavity; 9, communication hole; 10, core; 11, base; 111, mold foot; 112, bottom plate; 12, movable seat; 121, movable plate; 122, movable support plate; 13, ejecting member; 131, ejector rod; 132, end; 1321, cylindrical section; 1322, tapered section; 133, elastic part; 14, annular step; 15, first exhaust channel; 16, sliding seat; 17, angled guide pin; 18, moving member; 19, limiting part; 20, mounting plate; 21, convex post; 22, chute; 221, straight section; 222, inclined section; 23, push rod; 24, abutting part; 25, guiding projection; 26, spiral groove; 27, pouring port seat; 28, shunt; 29, second exhaust channel; 30, support post; 31, abutting head; 32, moving hole; 33, moving column; 34, straight hole section; 35, enlarged hole section. Detailed implementation manners

[0028] The following further elaborates on this application Figure 1-11 with reference to the accompanying drawings.

[0029] An embodiment of this application discloses a handle die-casting mold. Referring to Figure 1 , the handle die-casting mold includes a fixed mold group, a movable mold group, an insert mechanism, and an ejecting mechanism. The fixed mold group is opposite to the movable mold group. The ejecting mechanism is installed at one end of the movable mold group facing away from the fixed mold group. The insert mechanism is installed between the fixed mold group and the movable mold group.

[0030] When the die-casting mold is in use, the fixed mold group is installed at the fixed end of the die-casting equipment, and the ejecting mechanism is installed at the movable end of the die-casting equipment. The die-casting equipment drives the ejecting mechanism and the movable mold group to move linearly, so that the movable mold group moves closer to or away from the fixed mold group. When the fixed mold group and the movable mold group are abutted and closed, the die-casting equipment injects molten metal to form a casting between the fixed mold group and the movable mold group. When the movable mold group moves away from the fixed mold group to open the mold, the casting is exposed, so that the casting can be taken out.

[0031] Referring to Figure 1 , Figure 2 and Figure 3 , among them, for the fixed mold group and the movable mold group, the fixed mold group includes a fixed mold frame 1, a fixed mold core 2, and a pouring port seat 27. The fixed mold core 2 is embedded and installed in the fixed mold frame 1 through bolts. The pouring port seat 27 is in the shape of a hollow cylinder and is locked to the fixed mold frame 1 through bolts. The movable mold group includes a movable mold frame 3, a movable mold core 4, and a shunt 28. The movable mold core 4 is embedded and installed in the movable mold frame 3 through bolts. The shunt 28 is fixed to the side of the movable mold frame 3 facing the fixed mold frame 1.

[0032] On one side of the fixed mold core 2 opposite to the moving mold core 4, there are a shunt channel 5, a cavity 6, an overflow channel 7, and an overflow cavity 8 that are connected in sequence. The shunt channels 5, cavities 6, overflow channels 7, and overflow cavities 8 on the fixed mold core 2 and the moving mold core 4 correspond one by one, and the diverter 28 is connected to the shunt channel 5.

[0033] Refer to Figure 2 , Figure 3 and Figure 4 , on the fixed mold core 2 and the moving mold core 4, there are four cavities 6 that are symmetrically distributed in an array. The shunt channel 5 is connected to the four cavities 6 at the same time, and each cavity 6 is in the shape of an L-shaped handle. Each cavity 6 corresponds to two overflow channels 7. The two overflow channels 7 are both connected to one end of the cavity 6 far from the shunt channel 5, and the two overflow channels 7 are respectively connected to the opposite sides of the cavity 6, and the opening depth of the overflow channel 7 is less than the opening depth of the cavity 6. The overflow cavities 8 correspond to the overflow channels 7 one by one. The overflow cavity 8 is connected to one end of the overflow channel 7 far from the cavity 6, and the opening depth of the overflow cavity 8 is greater than the opening depth of the cavity 6.

[0034] Furthermore, the moving mold core 4 is connected with a first exhaust channel 15 at one end of the overflow cavity 8 far from the overflow channel 7. The opening depth of the first exhaust channel 15 is less than the opening depths of the overflow cavity 8 and the overflow channel 7. The moving mold frame 3 is provided with a second exhaust channel 29 corresponding to the first exhaust channel 15 one by one. The opening depth of the second exhaust channel 29 is the same as the opening depth of the first exhaust channel 15, and the second exhaust channel 29 is used to connect the corresponding first exhaust channel 15 with the external environment When the mold is closed, the opposite sides of the fixed mold frame 1 and the moving mold frame 3 abut against each other, the opposite sides of the fixed mold core 2 and the moving mold core 4 abut against each other, the pouring mouth seat 27 sleeves and is connected to the diverter 28, and at the same time, the channels and cavities corresponding to the moving mold core 4 and the fixed mold core 2 are opposite and connected. At this time, molten metal is injected into the pouring mouth seat 27, and the molten metal flows into and fills the shunt channel 5, the cavity 6, the overflow channel 7, and the overflow cavity 8 in sequence, and the gas in the original channels and cavities is discharged through the first exhaust channel 15 and the second exhaust channel 29 in sequence.

[0035] Refer to Figure 5 and Figure 6 , furthermore, in the fixed mold core 2 and the moving mold core 4, there is an annular step 14 at the junction of the cavity 6 and the overflow channel 7. The annular step 14 extends along the circumferential direction of the cavity 6 and is a step for reducing the opening depth from the cavity 6 to the overflow cavity 8, that is, the stepped end face of the annular step 14 faces the cavity 6 and serves as the parting surface of the cavity 6, so that the waste at the end of the handle finished product on the formed casting is thinner than the reduced diameter of the handle, so as to clearly indicate the cutting personnel to cut the waste in the subsequent process.

[0036] Furthermore, the width dimension of the overflow channel 7 gradually increases towards the overflow cavity 8, forming a weak point at the connection point between the waste material in the overflow channel 7 and the handle end, which is easy to cut.

[0037] Referring to Figure 2 , Figure 3 and Figure 7 , for the insert mechanism, the insert mechanism corresponds to the cavity 6 of the moving die core 4 one by one. Each group of insert mechanisms includes a core 10, a sliding seat 16 and an inclined guide pillar 17. Specifically, the sliding seat 16 is in a block shape and slides on the moving die frame 3 along the direction perpendicular to the mold opening and closing direction, and the sliding seat 16 moves towards or away from the moving die core 4 when sliding. The core 10 is detachably installed on the side of the sliding seat 16 facing the moving die core 4 through a pin shaft, and the core 10 is used to assist in forming the holes on the handle. One end of the inclined guide pillar 17 is fixedly connected to the fixed die frame 1, and the other end of the inclined guide pillar 17 slidably penetrates through the sliding seat 16. The length extension direction of the inclined guide pillar 17 is the same as the sliding direction of the sliding seat 16, and is inclined relative to the sliding direction of the sliding seat 16 and also inclined relative to the mold opening and closing direction.

[0038] During mold closing, the core 10 enters one end of the cavity 6 far from the runner 5, so that the molten metal wraps the core 10, so as to form a hole surrounding the core 10 at the handle end. During mold opening, the moving die frame 3 drives the inclined guide pillar 17 to move together, and the sliding seat 16 drives the core 10 to move away from the moving die core 4 under the guidance of the inclined guide pillar 17, so that the core 10 is separated from the casting. It should be noted that when the moving die core 4 just leaves the fixed die core 2 and the casting, the core 10 is still inserted into the casting, so that the casting will not leave with the moving die core 4.

[0039] Referring to Figure 7 and Figure 8 , for the ejection mechanism, the ejection mechanism includes a base 11, a movable seat 12, an ejector 13 and a mounting plate 20. The base 11 includes two mold feet 111 and a bottom plate 112. There are two mold feet 111, and both mold feet 111 are fixed to one end of the moving die frame 3 facing away from the fixed die frame 1, and the two mold feet 111 are respectively located on opposite sides of the moving die frame 3. The bottom plate 112 is in a square frame shape and is fixed to one end of the two mold feet 111 far from the moving die frame 3 at the same time. During the use of the mold, the bottom plate 112 is installed in the die-casting equipment for the telescopic power of mold opening and closing. The mounting plate 20 is in a square plate shape and is fixed to one end of the moving die frame 3 facing away from the fixed die frame 1.

[0040] The movable seat 12 moves in the mold opening and closing direction within the space enclosed by the mold feet 111, the bottom plate 112, and the mounting plate 20. At one end of the movable mold frame 3 facing away from the fixed mold frame 1, a support column 30 passing through the movable seat 12 is fixed along the mold opening and closing direction to guide the movement of the movable seat 12. When the mold is in use, the movable seat 12 is connected to another telescopic power of the die-casting equipment. During mold closing, the movable seat 12 abuts against the bottom plate 112. After mold opening, the movable seat 12 moves towards the movable mold frame 3 and abuts against the mounting plate 20. Among them, the movable seat 12 includes a movable plate 121 and a movable support plate 122. The movable plate 121 abuts against the movable support plate 122 and is detachably connected by bolts. The movable plate 121 is located between the movable support plate 122 and the mounting plate 20.

[0041] The ejector 13 is installed on the movable plate 121. In the movable mold group, communication holes 9 penetrating the movable mold core 4 and the movable mold frame 3 along the mold opening and closing direction are provided on both the inner walls of the sub-gate channel 5 and the overflow cavity 8. The number and positions of the ejectors 13 correspond one by one to the communication holes 9. The ejectors 13 extend into the corresponding communication holes 9. After mold opening, the movement of the movable seat 12 drives the ejectors 13 to move, so that the ejectors 13 eject the casting out of the movable mold core 4.

[0042] Refer to Figure 8 、 Figure 9 and Figure 10 Each ejector 13 includes a ejector rod 131, a end head 132, and an elastic part 133. The ejector rod 131 is a long round rod extending along the mold opening and closing direction. One end of the ejector rod 131 is coaxially fixed with a contact head 31. The contact head 31 is disc-shaped and has an outer diameter larger than that of the ejector rod 131. The movable plate 121 is provided with a countersunk hole for the ejector rod 131 to pass through. The ejector rod 131 passes through the countersunk hole, and the contact head 31 is located in the countersunk hole and is clamped between the movable plate 121 and the movable support plate 122 for installing the ejector rod 131.

[0043] The end of the ejector rod 131 away from the contact head 31 passes through the mounting plate 20 and the movable mold frame 3 in sequence and then enters the communication hole 9 of the movable mold core 4. The end head 132 is detachably connected to the end of the ejector rod 131 away from the contact head 31. Specifically, the end head 132 includes a cylindrical section 1321 and a tapered section 1322 connected coaxially in sequence along the axial direction of the ejector rod 131. The outer diameter of the tapered section 1322 gradually increases in the direction away from the cylindrical section 1321. The cylindrical section 1321 is coaxially sleeved on the end of the ejector rod 131 away from the contact head 31, and a moving hole 32 extending along the axial direction parallel to the cylindrical section 1321 is provided on the outer wall of the cylindrical section 1321. The moving hole 32 penetrates through to the inner cavity of the cylindrical section 1321. A threaded hole is provided on the end of the ejector rod 131 along its radial direction. The ejector rod 131 is threadedly connected with a moving column 33 through the threaded hole. The end of the moving column 33 extends out of the ejector rod 131 and enters the moving hole 32 to guide the axial movement of the cylindrical section 1321 relative to the ejector rod 131.

[0044] Reference Figure 8 and Figure 9 Figure 9 , the communication hole 9 on the moving mold core 4 includes a straight hole section 34 and an enlarged hole section 35 that are sequentially distributed along the direction away from the mounting plate 20. The inner diameter of the moving mold core 4 at the straight hole section 34 is the same as the outer diameter of the cylindrical section 1321. The inner diameter of the moving mold core 4 at the enlarged hole section 35 increases sequentially along the direction away from the cylindrical section 1321, and the inclination angle of the enlarged hole section 35 is the same as the inclination angle of the tapered section 1322. When the end head 132 is located in the communication hole 9, the cylindrical section 1321 of the end head 132 is located in the straight hole section 34, and the tapered section 1322 of the end head 132 is located in the enlarged hole section 35. Limited by the enlarged hole section 35, the tapered section 1322 is restricted from moving into the straight hole section 34.

[0045]

[0045] The elastic part 133 is a spring. The elastic part 133 is sleeved on the outer wall of the ejector rod 131. One end of the elastic part 133 is fixedly connected to the end of the mounting plate 20 facing away from the movable plate 121. The other end of the elastic part 133 is connected with a moving part 18. The moving part 18 is in the shape of a circular ring coaxial with the elastic part 133. At the same time, the outer diameter of the moving part 18 is smaller than the inner diameter of the straight hole section 34. A limiting part 19 protrudes inward from the inner wall of the straight hole section 34 of the moving mold core 4. The inner diameter of the limiting part 19 is smaller than the outer diameter of the moving part 18. When the end of the moving part 18 close to the mounting plate 20 abuts against the limiting part 19, the elastic part 133 is still in a stretched state.

[0046]

[0046] It should be noted that the moving part 18 has a magnetic attraction force for magnetically attracting the end head 132. When the tapered section 1322 is located in the enlarged hole section 35, the moving part 18 is within the range of magnetically attracting the tapered section 1322 under the limitation of the limiting part 19. The moving part 18 is magnetically attracted to the end of the cylindrical section 1321 away from the tapered section 1322, so that the tapered section 1322, under the suction of the moving part 18 and the retraction trend of the elastic part 133, fits and presses tightly against the enlarged hole section 35 in the direction close to the mounting plate 20.

[0047]

[0047] During mold closing, the tapered section 1322 presses tightly against the inner wall of the enlarged hole section 35. And when the molten metal flows, the tapered section 1322 is subjected to a pressure moving in the direction close to the mounting plate 20, so as to further promote the relative movement of the tapered section 1322 relative to the ejector rod 131 in the direction close to the mounting plate 20 until it presses tightly against the inner wall of the enlarged hole section 35, so that the molten metal is not likely to leak. After mold opening, the movable seat 12 moves in the direction close to the mounting plate 20 to push the ejector rod 131 and the end head 132 to eject the casting out of the moving mold core 4.

[0048] Reference Figure 10 and Figure 11, Further, along the radial direction of the ejector rod 131 on the mounting plate 20, there are convex columns 21 corresponding to the ejector rods 131 one by one. A sliding groove 22 for the convex column 21 to slide is formed on the outer wall of the ejector rod 131, and the range of the convex column 21 moving along the radial direction of the ejector rod 131 is limited, so that the convex column 21 is always located in the sliding groove 22. Specifically, the sliding groove 22 includes a straight section 221 and an inclined section 222 that are sequentially distributed and connected along the direction close to the movable plate 121. The straight section 221 extends along the axial direction of the ejector rod 131 in parallel and penetrates through one end of the ejector rod 131 away from the abutting head 31, and the inclined section 222 extends obliquely along the circumferential direction of the ejector rod 131.

[0049] During the process of the movable seat 12 moving towards the mounting plate 20. The convex column 21 slides from the straight section 221 into the inclined section 222. When the convex column 21 slides in the inclined section 222, the ejector rod 131 is guided to rotate, thereby driving the end 132 to rotate together, so that the contact surface between the end 132 and the casting rotates and separates for demolding, so that the manipulator for taking the casting on the die-casting equipment does not need to move away from the moving die insert 4 after clamping the casting to separate the casting from the end 132.

[0050] Among them, the convex column 21 reciprocates along the radial direction of the ejector rod 131 during the process of the movable plate 121 moving towards the mounting plate 20, and knocks on the inner wall of the sliding groove 22 to further assist in separating the end 132 from the casting. Specifically, a push rod 23 corresponding to the convex column 21 is rotatably connected to the mounting plate 20. The axial direction of the push rod 23 is parallel to the axial direction of the ejector rod 131, and the end of the push rod 23 away from the mounting plate 20 extends towards the movable plate 121 and slides into the movable plate 121. Through holes for the push rod 23 to slide through are formed in the movable plate 121 and the movable supporting plate 122.

[0051] A contact portion 24 is coaxially fixed and sleeved at one end of the push rod 23 located on the mounting plate 20. The contact portion 24 is annular, and the outer periphery of the contact portion 24 reciprocates up and down along its own circumferential direction, so that the linear distance from the outer periphery of the contact portion 24 to the axial direction of the push rod 23 circulates in a pattern of gradually increasing to gradually decreasing along the circumferential direction of the contact portion 24. A guiding convex 25 corresponding to the push rod 23 is fixed on the movable plate 121. A spiral groove 26 for guiding and abutting is formed on the outer periphery of the push rod 23. The spiral groove 26 extends spirally along the axial direction of the push rod 23, so that when the movable plate 121 moves towards the mounting plate 20, through the cooperation of the guiding convex 25 and the spiral groove 26, the push rod 23 and the contact portion 24 are driven to rotate in a cycle.

[0052] One end of the convex column 21 away from the ejector rod 131 is magnetically attracted to the outer periphery of the contact portion 24, so that the convex column 21 is driven to reciprocate towards and away from the ejector rod 131 during the rotation of the contact portion 24. When the convex column 21 moves towards the ejector rod 131, it knocks on the ejector rod 131.

[0053] The implementation principle of a handle die-casting mold in an embodiment of the present application is as follows: The ejector 13 is arranged in the communication hole 9 between the sub-gate 5 and the overflow cavity 8, avoiding ejector pin marks on the surface of the casting. When the mold is closed, the molten metal fills the cavity 6 and the overflow cavity 8 through the sub-gate 5, and the exhaust channel ensures the discharge of gas. When the mold is opened, the angle pin 17 guides the core 10 to separate from the casting, and the ejecting mechanism ejects the casting through the ejector rod 131 and the end 132. The ejector rod 131 rotates under the guidance of the convex column 21 and the chute 22, separating the casting from the end 132, and at the same time, the reciprocating knocking of the push rod 23 further assists in demolding.

[0054] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A handle die-casting mold, characterized in that Including: A fixed mold unit, a movable mold unit, an insert mechanism, and an ejection mechanism; The fixed mold unit includes a fixed mold frame (1) and a fixed mold core (2) installed in the fixed mold frame (1); the movable mold unit includes a movable mold frame (3) and a movable mold core (4) installed in the movable mold frame (3); both the fixed mold core (2) and the movable mold core (4) are provided with a shunt channel (5), a cavity (6), an overflow channel (7), and an overflow cavity (8) that are sequentially connected; the overflow channel (7) is located at one end of the cavity (6) away from the shunt channel (5); the movable mold unit is provided with communication holes (9) that penetrate the movable mold unit in the mold opening and closing direction on the inner walls of both the shunt channel (5) and the overflow cavity (8); The insert mechanism is arranged between the fixed mold unit and the movable mold unit, and includes a core (10) extending into the cavity (6), and the core (10) disengages from the casting when the movable mold core (4) leaves the fixed mold core (2); The ejection mechanism includes a base (11), a movable seat (12), and an ejection member (13) installed on the movable seat (12); the base (11) is connected to one end of the movable mold frame (3) facing away from the fixed mold frame (1), the movable seat (12) moves on the base (11) in the mold opening and closing direction, and the ejection members (13) correspond to the communication holes (9) one by one and slide in the corresponding communication holes (9); 2. The die-casting mold for a handle according to claim 1, characterized in that: The fixed mold core (2) and the movable mold core (4) form an annular step (14) extending along the circumferential direction of the cavity (6) between the cavity (6) and the overflow channel (7), and the end face of the annular step (14) faces the cavity (6); 3. The die-casting mold for a handle according to claim 1, characterized in that: Each cavity (6) corresponds to two overflow cavities (8), and the two overflow cavities (8) are respectively located on opposite sides of the corresponding cavity (6); 4. The die-casting mold for a handle according to claim 1, wherein: The size of the overflow channel (7) gradually increases in the direction close to the overflow cavity (8); 5. The die-casting mold for a handle according to claim 1, characterized in that: The movable mold core (4) is provided with a first exhaust channel (15) at one end of the overflow cavity (8) away from the overflow channel (7), and the first exhaust channel (15) communicates to the outside of the movable mold core (4); 6. The die-casting mold for a handle according to claim 1, characterized in that: The insert mechanism further includes a sliding seat (16) and an inclined guide post (17); the sliding seat (16) slides on the movable mold frame (3) in a direction perpendicular to the mold opening and closing direction, and the core (10) is installed on the sliding seat (16); the inclined guide post (17) is connected to the fixed mold frame (1), and the inclined guide post (17) simultaneously slides through the sliding seat (16) obliquely with respect to the sliding direction of the sliding seat (16); when the movable mold unit moves away from the fixed mold unit in the mold opening and closing direction, the inclined guide post (17) pushes the sliding seat (16) and the core (10) to move away from the casting; 7. The die-casting mold for a handle according to claim 1, wherein: The ejector member (13) includes a ejector rod (131), an end head (132), and an elastic part (133); the ejector rod (131) is arranged on the movable seat (12), and one end of the ejector rod (131) far from the movable seat (12) extends into the corresponding communication hole (9); the end head (132) is sleeved on one end of the ejector rod (131) far from the movable seat (12), and can move relative to the ejector rod (131) along the extending direction of the communication hole (9), and one end of the end head (132) far from the ejector rod (131) includes a tapered section (1322) with an outer diameter gradually increasing in a direction away from the ejector rod (131), and one end of the communication hole (9) far from the movable seat (12) has an enlarged hole section (35) adapted to the tapered section (1322); the elastic part (133) is connected to the end head (132), and gives the end head (132) an elastic force to move towards the movable seat (12) and press against the inner wall of the enlarged hole section (35).

8. A handle die-casting mold according to claim 7, characterized in that: The elastic part (133) is connected with a moving part (18), the moving part (18) is located between the end head (132) and the elastic part (133), the elastic part (133) is magnetically attracted to the end head (132) through the moving part (18), and a limiting part (19) for the end of the moving part (18) away from the end head (132) to abut against is arranged in the communication hole (9) of the moving die module, so that when the end head (132) is located in the enlarged hole section (35), the moving part (18) is within the magnetic attraction range of the end head (132).

9. The die-casting mold for a handle according to claim 7, wherein: The moving die frame (3) has a mounting plate (20), and convex columns (21) corresponding to the ejector rods (131) one by one are arranged on the mounting plate (20), and sliding grooves (22) for the convex columns (21) to be inserted into are formed on the ejector rods (131); The sliding groove (22) includes a straight section (221) and an inclined section (222) which are sequentially communicated in a direction close to the movable seat (12), the straight section (221) extends along the length direction of the ejector rod (131), and the inclined section (222) extends obliquely along the circumferential direction of the ejector rod (131); during the process of the movable seat (12) moving towards the mounting plate (20), the convex column (21) slides from the straight section (221) to the inclined section (222).

10. A handle die-casting mold according to claim 9, characterized in that: Push rods (23) corresponding to the convex columns (21) one by one are rotatably connected to the mounting plate (20), one end of each push rod (23) has an abutting part (24) abutting against the convex column (21), the outer periphery of the abutting part (24) reciprocates and undulates along its own circumference, and the other end of each push rod (23) slides on the movable seat (12) along the die opening and closing direction; The movable seat (12) has a guiding convex (25) inserted into the push rod (23), and a spiral groove (26) for the guiding convex (25) to be inserted into is formed on the outer periphery of the push rod (23).

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