Cast hub demolding device

Abstract

A hub cavity is formed among an upper mold, a lower mold and a side mold, the side mold can be demolded in the horizontal direction, the upper mold can be close to or away from the lower mold, the upper mold comprises a mold rod, the lower mold comprises a mold table, the mold table is provided with a first channel, the mold rod can penetrate through the first channel to be connected with a movable frame, and the movable frame is connected with an ejector rod. The upper end of the ejector rod abuts against the hub, the ejector rod penetrates through the movable frame and is in sliding connection with the movable frame, the fixed frame is located below the movable frame, the ejector rod is in sliding connection with the fixed frame and comprises a first state, a second state, a third state and a fourth state, the upper mold and the lower mold are closed in the first state, and the upper mold is separated from the hub in the second state. According to the hub demolding device, demolding is conducted in the mode that the hub is separated from the side mold firstly, the hub can be driven to be separated from the lower mold through separation of the upper mold, deformation of the side mold is prevented, an ejection cylinder used below the mold is omitted, and the hub demolding device has the advantage of saving energy.

Description

Technical Field

[0001] The present invention relates to the technical field of metal casting molds, and more particularly to a demoulding device for a casting wheel hub. Background Art

[0002] In the prior art, motorcycle wheels are made by casting molten metal in a mold. The mold includes multiple side molds, an upper mold and a lower mold, which are clamped by a cylinder and then cast with molten metal. After the casting and cooling are completed, the general casting mold will first open the upper mold, then pull open the side mold, and finally push the hub out of the lower mold through the pushing cylinder set under the lower mold. However, this demolding method that starts from the upper mold first, if the upper mold sticks to the wheel hub, will cause the side mold to deform after multiple demoldings, making the side mold scrapped and unusable. Therefore, a technical solution is needed to solve the above problem. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, to prevent deformation of the side mold, and to provide a demoulding device for a casting wheel hub.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] The present invention discloses a demoulding device for casting a wheel hub, comprising an upper mold, a lower mold, a side mold, a movable frame, a fixed frame, and a push rod. A wheel hub cavity is formed between the upper mold, the lower mold, and the side molds. The side molds can be demoulded in a horizontal direction. The upper mold can approach or move away from the lower mold. The upper mold comprises a mold rod, and the lower mold comprises a mold platform. The mold platform is provided with a first channel. The mold rod can pass through the first channel and be connected to the movable frame. The movable frame is connected to a plurality of push rods. The upper ends of the push rods abut against the wheel hub. The push rods pass through the movable frame and are slidably connected to the movable frame. The fixed frame is located below the movable frame, and the push rods are slidably connected to the fixed frame.

[0006] It includes a first state, a second state, a third state, and a fourth state. In the first state, the upper mold and the lower mold are closed, in the second state, the upper mold is separated from the wheel hub, in the third state, the push rod lifts the wheel hub away from the lower mold, and in the fourth state, the mold rod is separated from the movable frame.

[0007] Furthermore, the mold platform is provided with a first guide hole, in which a first locking block is installed, the first guide hole extends radially, the first locking block can slide along the first guide hole, and the first locking block includes a first end, and in a first state, the first end extends out of the outer wall of the mold platform, and in a second state, the first end is located in the first guide hole.

[0008] Furthermore, the first locking block includes a second end, the mold rod includes a conical surface section, the diameter of the conical surface section gradually decreases from top to bottom, the second end abuts against the maximum diameter of the conical surface section in the first state, and the second end abuts against the minimum diameter of the conical surface section in the second state.

[0009] Furthermore, the movable frame includes a first connecting seat, the first connecting seat is provided with a slot and a second guide hole, the lower end of the mold rod can be inserted into the slot, the second guide hole extends radially, the second guide hole is installed with a second locking block, the second locking block can slide along the second guide hole, the side wall of the mold rod is provided with a first locking hole corresponding to the second locking block, in the first state, the second state, and the third state, part of the second locking block is inserted into the first locking hole, the upper mold can drive the movable frame to move, and in the fourth state, the second locking block is disengaged from the first locking hole.

[0010] Furthermore, the lower end of the mold rod is hemispherical, the end of the second locking block facing the mold rod is hemispherical, and the first locking hole is a hemispherical groove corresponding to the second locking block.

[0011] Furthermore, the movable frame includes a connecting rod, which extends toward the fixed frame. The connecting rod passes through the fixed frame. The fixed frame includes a second connecting seat. The second connecting seat is provided with a second channel. The connecting rod passes through the second channel. The lower end of the connecting rod is provided with a limit plate. In the fourth state, the limit plate is against the lower end surface of the fixed plate.

[0012] Furthermore, the second connecting seat is provided with a third guide hole, the third guide hole extends radially, the third guide hole is installed with a third locking block, the third locking block can slide along the third guide hole, the side wall of the connecting rod is provided with a second locking hole corresponding to the third locking block, and in the fourth state, part of the third locking block is inserted into the second locking hole.

[0013] Furthermore, one end of the third locking block facing the connecting rod is hemispherical, and the second locking hole is a hemispherical groove corresponding to the third locking block.

[0014] Furthermore, the push rod includes a first limit block and a second limit block, the movable part includes a first side plate, the fixed frame includes a second side plate, the first side plate and the second side plate extend radially along the lower mold, the push rod passes through the first side plate and the second side plate, the first limit block is located above the first side plate, and the second limit block is located between the first side plate and the second side plate.

[0015] Furthermore, the push rod is equipped with a return spring, which is located between the lower mold and the first side plate. In the first and second states, the second limit block is against the second side plate, and in the third and fourth states, the first side plate is against the first limit block.

[0016] The beneficial effects of the present invention are:

[0017] The present invention adopts a method of first disengaging the side mold to ensure that the side mold can reduce deformation. When the upper mold is disengaged, the lower mold and the wheel hub are fixed by the mold rod, the first locking block on the mold base and the limiting groove formed on the wheel hub, so that the upper mold can be disengaged from the wheel hub. After the upper mold and the wheel hub are disengaged, the movable seat connected to the mold rod drives the ejector rod to eject the wheel hub out of the lower mold. After the wheel hub is ejected, the mold rod can be disengaged from the movable frame, so that the wheel hub can be taken out. The present invention also eliminates the use of an ejector cylinder under the mold, saving energy consumed by demoulding and providing more space for the cooling pipeline of the lower mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a cross-sectional view of the first state of this embodiment.

[0019] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0020] Figure 3 for Figure 1 Enlarged view of point B in the middle.

[0021] Figure 4 for Figure 1 Enlarged view of point C in the middle.

[0022] Figure 5 This is a cross-sectional view of the second state of this embodiment.

[0023] Figure 6 for Figure 5 Enlarged view of point D in the middle.

[0024] Figure 7 It is a cross-sectional view of the third state of this embodiment.

[0025] Figure 8 This is a cross-sectional view of the fourth state of this embodiment.

[0026] Figure markings: 1. upper mold; 11. mold rod; 111. conical surface section; 112. first locking hole; 101. wheel hub; 1011. limiting groove; 2. lower mold; 21. mold base; 211. first guide hole; 212. first channel; 22. first locking block; 221. first end; 222. second end; 3. movable frame; 31. first connecting seat; 311. second guide hole; 312. slot; 32. second locking block; 33. connecting rod; 331. second locking hole; 332. limiting plate; 34. first side plate; 4. fixing frame; 41. second connecting seat; 411. third guide hole; 412. second channel; 42. third locking block; 43. second side plate; 5. ejector rod; 51. first limiting block; 52. second limiting block; 53. return spring; 6. side mold. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in this embodiment with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0028] like Figures 1 to 8 As described above, this embodiment discloses a casting wheel hub demolding device, including an upper mold 1, a lower mold 2, a side mold 6, a movable frame 3, a fixed frame 4, and a push rod 5. A wheel hub 101 cavity is formed between the upper mold 1, the lower mold 2, and the side mold 6. The side mold 6 can be demolded in the horizontal direction. The side mold 6 is driven by a cylinder. The upper mold 1 is connected to the oil cylinder. The upper mold 1 is driven by the oil cylinder. The upper mold 1 can approach or move away from the lower mold 2, and the lower mold 2 remains fixed. When demolding, the side mold 6 is first pulled out from the side to prevent the side mold 6 from deforming during demolding. This embodiment includes a first state, a second state, a third state, and a fourth state. In the first state, the upper mold 1 and the lower mold 2 are closed. In the second state, the upper mold 1 is separated from the wheel hub 101. In the third state, the push rod 5 lifts the wheel hub 101 away from the lower mold 2. In the fourth state, the mold rod 11 is separated from the movable frame 3.

[0029] like Figure 1 、 Figure 2 、 Figure 4As shown, the upper mold 1 includes a mold rod 11, the mold rod 11 is located at the center of the upper mold 1, the lower mold 2 includes a mold base 21, the mold base 21 is provided with a first channel 212, the first channel 212 is concentrically arranged with the mold rod 11, the mold base 21 is provided with a first guide hole 211, a first locking block 22 is installed in the first guide hole 211, the first guide hole 211 extends radially, the first locking block 22 can slide along the first guide hole 211, a spring is installed in the first guide hole 211, the spring supports the first locking block 22 so that the first locking block 22 can be kept against the mold rod 11, the first locking block 22 includes a first end 221 and a second end 222, the mold rod 11 includes a conical surface section 111, the diameter of the conical surface section 111 gradually decreases from top to bottom, the second end 222 of the first locking block 22 can be against the conical surface section 111, and the second end 222 is spherical, so that the second end 222 and the mold rod 11 The contact is point contact, which reduces the contact area and friction. In the first state, the first end 221 extends out of the outer wall of the mold base 21, and the first end 221 forms a limiting groove 1011 on the wheel hub 101 by casting. The limiting groove 1011 and the first end 221 are clamped, and the second end 222 presses against the maximum diameter of the conical section 111. The first end 221 extends out of the mold base 21 the most. In the second state, the first end 221 is located in the first guide hole 211, and the second end 222 presses against the minimum diameter of the conical section 111. When the first state changes to the second state, the first end 221 will gradually retract into the first guide hole 211. When reaching the second state, the lock between the wheel hub 101 and the lower mold 2 is released, and the length of the conical section 111 is L. The length of L is greater than the contact length between the upper mold 1 and the wheel hub 101, ensuring that the upper mold 1 and the wheel hub 101 are preferentially separated.

[0030] like Figure 1 、 Figure 3As shown, the mold rod 11 can pass through the first channel 212 to be connected to the movable frame 3, and the movable frame 3 includes a first connecting seat 31, the first connecting seat 31 is provided with a slot 312 and a second guide hole 311, the lower end of the mold rod 11 can be inserted into the slot 312, the second guide hole 311 extends radially, the second guide hole 311 is installed with a second locking block 32, the second locking block 32 can slide along the second guide hole 311, and the second locking block 32 is supported by a spring so that a part of the second locking block 32 can extend out of the second guide hole 311, and the side wall of the mold rod 11 is provided with a first locking hole 112 corresponding to the second locking block 32. There are multiple second locking blocks 32. In the first state, the second state, and the third state, parts of the second locking block 32 are inserted into the first locking hole 112, the mold rod 11 and the movable frame 3 remain fixed, and the upper mold 1 can drive the movable frame 3 to move. In the fourth state, the second locking block 32 is disengaged from the first locking hole 112. In the fourth state, the upward movement of the movable frame 3 is limited, and the second locking block 32 is forced to be pressed inward to disengage from the first locking hole 112, and the mold rod 11 is pulled out of the slot 312 upward. The mold rod 11 and the movable frame 3 are disengaged, so that the mold rod 11 can leave the first channel 212, and the upper mold 1 is away from the wheel hub 101, so that the wheel hub 101 can be taken out.

[0031] More preferably, the lower end of the mold rod 11 is hemispherical, the second locking block 32 is hemispherical at one end facing the mold rod 11, and the first locking hole 112 is a hemispherical groove corresponding to the second locking block 32. The hemispherical second locking block 32 and the first locking hole 112 of the hemispherical groove cooperate with each other, which can better enable the second locking block 32 and the first locking hole 112 to be force-connected and force-disengaged. The lower end of the hemispherical mold rod 11 can better push away all the second locking blocks 32 when it is inserted into the slot 312.

[0032] like Figure 1 、 Figure 4 As shown, the movable frame 3 includes a connecting rod 33, which extends toward the fixed frame 4, and the connecting rod 33 passes through the fixed frame 4. The fixed frame 4 includes a second connecting seat 41, and the second connecting seat 41 is provided with a second channel 412. The connecting rod 33 passes through the second channel 412, and the lower end of the connecting rod 33 is provided with a limit plate 332. In the fourth state, the limit plate 332 is against the lower end surface of the fixed plate. The limit plate 332 can limit the upward movement of the movable frame 3. When the movable frame 3 reaches the highest position, the second locking block 32 can be disengaged from the first locking hole 112.

[0033] More preferably, the second connecting seat 41 is provided with a third guide hole 411, and the third guide hole 411 extends radially. The third guide hole 411 is installed with a third locking block 42, and the third locking block 42 can slide along the third guide hole 411. The third locking block 42 is supported by the spring to resist the connecting rod 33. The side wall of the connecting rod 33 is provided with a second locking hole 331 corresponding to the third locking block 42. In the fourth state, part of the third locking block 42 is inserted into the second locking hole 331. When the movable frame 3 reaches the highest position, the third locking block 42 is buckled with the second locking hole 331, so that the movable frame 3 is at the highest position for fixing, preventing the movable frame 3 from being After the third locking block 42 is disengaged from the second locking hole 331, the movable frame 3 falls downward. When the fourth state is restored to the first state, the mold rod 11 is reinserted and fixed in the slot 312, and drives the movable frame 3 to move downward. The third locking block 42 is forced to disengage from the second locking hole 331, so that the movable frame 3 can be synchronously lowered with the upper mold 1. Similarly, the third locking block 42 is hemispherical at one end facing the connecting rod 33, and the second locking hole 331 is a hemispherical groove corresponding to the third locking block 42. The hemispherical third locking block 42 and the second locking hole 331 of the hemispherical groove cooperate with each other, which can better connect and separate the third locking block 42 and the second locking hole 331 under force.

[0034] like Figure 1 、 Figures 4 to 8 The movable frame 3 is connected to multiple push rods 5, the upper ends of the push rods 5 are against the wheel hub 101, and the upper end surfaces of the push rods 5 constitute part of the cavity mold surface of the lower mold 2. The push rods 5 pass through the movable frame 3 and are slidably connected with the movable frame 3. The fixed frame 4 is located below the movable frame 3. The push rods 5 are slidably connected with the fixed frame 4. The movable part includes a first side plate 34, and the first side plate 34 is provided with a plurality of them. The fixed frame 4 includes a second side plate 43, and the second side plate 43 is provided with a plurality of them. The first side plate 34 and the second side plate 43 extend along the radial direction of the lower mold 2. The push rod 5 passes through the first side plate 34 and the second side plate 43. In the process from the second state to the third state, the push rod 5 pushes the wheel roller 101 out of the lower mold 2. The push rod 5 includes a first limit block 51 and a second limit block 52. The first limit block 51 is located above the first side plate 34. In the third and fourth states, the first side plate 34 is against the first limit block 51, and the first limit block 51 is driven upward by the first side plate 34.

[0035] The second limit block 52 is located between the first side plate 34 and the second side plate 43. The push rod 5 is installed with a return spring 53. The return spring 53 is located between the lower mold 2 and the first side plate 34. The second limit block 52 is against the second side plate 43 in the first state and the second state. The return spring 53 can reset the push rod 5 in the first state and the second state, so that the second limit block 52 can be against the upper end surface of the second side plate 43. The fixing frame 4 remains fixed differently. The fixing frame 4 provides limiting support for the lower end of the push rod 5.

[0036] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A casting wheel hub demoulding device, characterized in that: The invention comprises an upper mold (1), a lower mold (2), a side mold (6), a movable frame (3), a fixed frame (4), and a top rod (5); a wheel hub (101) cavity is formed between the upper mold (1), the lower mold (2), and the side mold (6); the side mold (6) can be demoulded in a horizontal direction; the upper mold (1) can be moved close to or away from the lower mold (2); the upper mold (1) comprises a mold rod (11); the lower mold (2) comprises a mold table (21); and the mold table (21) is provided with a first A channel (212), the mold rod (11) can pass through the first channel (212) and be connected to the movable frame (3), the movable frame (3) is connected to a plurality of push rods (5), the upper ends of the push rods (5) abut against the wheel hub (101), the push rods (5) pass through the movable frame (3) and are slidably connected to the movable frame (3), the fixed frame (4) is located below the movable frame (3), and the push rods (5) are slidably connected to the fixed frame (4); The invention comprises a first state, a second state, a third state and a fourth state. In the first state, the upper mold (1) and the lower mold (2) are engaged with each other. In the second state, the upper mold (1) and the wheel hub (101) are separated. In the third state, the push rod (5) lifts the wheel hub (101) away from the lower mold (2). In the fourth state, the mold rod (11) is separated from the movable frame (3).

2. A casting hub demoulding device according to claim 1, characterized in that: The mold platform (21) is provided with a first guide hole (211), a first locking block (22) is installed in the first guide hole (211), the first guide hole (211) extends radially, the first locking block (22) can slide along the first guide hole (211), the first locking block (22) includes a first end (221), in a first state, the first end (221) extends out of the outer wall of the mold platform (21), and in a second state, the first end (221) is located in the first guide hole (211).

3. A casting hub demoulding device according to claim 2, characterized in that: The first locking block (22) includes a second end (222), the mold rod (11) includes a conical section (111), the diameter of the conical section (111) gradually decreases from top to bottom, the second end (222) abuts against the maximum diameter of the conical section (111) in the first state, and the second end (222) abuts against the minimum diameter of the conical section (111) in the second state.

4. The demoulding device for a casting wheel hub according to claim 1, characterized in that: The movable frame (3) includes a first connecting seat (31), the first connecting seat (31) is provided with a slot (312) and a second guide hole (311), the lower end of the mold rod (11) can be inserted into the slot (312), the second guide hole (311) extends radially, the second guide hole (311) is installed with a second locking block (32), the second locking block (32) can slide along the second guide hole (311), the side wall of the mold rod (11) is provided with a first locking hole (112) corresponding to the second locking block (32), in the first state, the second state, and the third state, part of the second locking block (32) is inserted into the first locking hole (112), the upper mold (1) can drive the movable frame (3) to move, and in the fourth state, the second locking block (32) is disengaged from the first locking hole (112).

5. A casting hub demoulding device according to claim 4, characterized in that: The lower end of the mold rod (11) is hemispherical, the end of the second locking block (32) facing the mold rod (11) is hemispherical, and the first locking hole (112) is a hemispherical groove corresponding to the second locking block (32).

6. The demoulding device for a casting hub according to claim 1, characterized in that: The movable frame (3) includes a connecting rod (33), the connecting rod (33) extends toward the fixed frame (4), the connecting rod (33) passes through the fixed frame (4), the fixed frame (4) includes a second connecting seat (41), the second connecting seat (41) is provided with a second channel (412), the connecting rod (33) passes through the second channel (412), the lower end of the connecting rod (33) is provided with a limiting plate (332), and in the fourth state, the limiting plate (332) abuts against the lower end surface of the fixed plate.

7. A casting hub demoulding device according to claim 6, characterized in that: The second connecting seat (41) is provided with a third guide hole (411), and the third guide hole (411) extends radially. The third guide hole (411) is installed with a third locking block (42), and the third locking block (42) can slide along the third guide hole (411). The side wall of the connecting rod (33) is provided with a second locking hole (331) corresponding to the third locking block (42). In the fourth state, part of the third locking block (42) is inserted into the second locking hole (331).

8. The demoulding device for a casting hub according to claim 7, characterized in that: One end of the third locking block (42) facing the connecting rod (33) is hemispherical, and the second locking hole (331) is a hemispherical groove corresponding to the third locking block (42).

9. The demoulding device for a casting wheel hub according to claim 1, characterized in that: The ejector rod (5) includes a first limiting block (51) and a second limiting block (52); the movable part includes a first side plate (34); the fixed frame (4) includes a second side plate (43); the first side plate (34) and the second side plate (43) extend radially along the lower mold (2); the ejector rod (5) passes through the first side plate (34) and the second side plate (43); the first limiting block (51) is located above the first side plate (34); and the second limiting block (52) is located between the first side plate (34) and the second side plate (43).

10. The demoulding device for a casting hub according to claim 9, characterized in that: The push rod (5) is equipped with a return spring (53), and the return spring (53) is located between the lower mold (2) and the first side plate (34). In the first state and the second state, the second limit block (52) abuts against the second side plate (43), and in the third state and the fourth state, the first side plate (34) abuts against the first limit block (51).

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