Mold ejection device

Abstract

A mold ejection device comprises a mounting plate and a power assembly, a square groove is formed in the mounting plate, a threaded rod is rotationally mounted in the square groove, and a pair of sliding blocks are mounted on the threaded rod in a threaded mode; the output end of the pneumatic push rod pushes the transverse plate to move downwards, so that a pair of ejection heads in a pair of ejection assemblies at the bottom of the transverse plate is in contact with a pair of ejection rollers on a mold to generate extrusion, a product in the mold can be quickly extruded and ejected out, the demolding efficiency of the product is effectively improved, deformation of the product is avoided, and the quality of the product is ensured; an ejection head at the bottom of the ejection assembly makes contact with an ejection rod on a mold and extrudes the ejection rod, so that a movable column slides upwards in a cavity barrel, force transmitted by the movable column is counteracted through resilience force of a spring, and therefore the situation that the ejection head directly and rigidly abuts against the ejection rod to eject out a product can be avoided, impact force borne by the product can be buffered, and the product quality is improved. The surface of the product cannot be traced due to extrusion, and the defective rate of the product is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a mold ejection device. Background Art

[0002] A mold is a tool that makes a blank into a workpiece with a specific shape and size under the action of external force. It is widely used in blanking, die forging, cold heading, extrusion, powder metallurgy part pressing, pressure casting, and the compression molding or injection molding of products such as engineering plastics, rubber, and ceramics. A mold generally includes a moving mold and a fixed mold, which can be separated and combined. When separated, the workpiece is taken out, and when combined, the blank is injected into the mold cavity for forming. After the workpiece is formed, an ejection device is required to demold the workpiece. Therefore, a Chinese invention patent (publication number: CN116408906A) proposes a mold product ejection device, which includes a strip-shaped block and two sliders. One end of each slider is provided with a caliper that cooperates with the mold clamping groove on the mold. The two sliders are both sleeved on the strip-shaped block and slide along the strip-shaped block, and the calipers of the two sliders are arranged oppositely. There are a screw rod and a sleeve rod. The sleeve rod passes through one end of the screw rod, and the other end of the screw rod is provided with an ejection part. A threaded through hole for the screw rod to pass through is provided in the center of the strip-shaped block. By clamping the mold clamping groove with the caliper and rotating the screw rod, the ejection can be completed. The operation is convenient and the occupied space is small.

[0003] However, this device ejects and demolds the product in the mold by manually rotating a screw rod, and it is necessary to repeatedly operate the device to squeeze the two ejector rods on the mold through the screw rod respectively, making it difficult to quickly squeeze out the product in the mold. The demolding efficiency of the product is relatively low. Moreover, when the product in the mold is demolded, it is difficult to simultaneously squeeze the ejector rods on the mold, and the extrusion force received by the product in the mold is uneven, which easily causes the product to deform and affects the quality of the product. This device directly hard-tops the ejection part on the screw rod against the ejector rod to eject the product, and the impact force received by the product through the ejector rod is relatively large, which will cause marks on the surface of the product due to extrusion, resulting in an increase in the defective rate of the product. Summary of the Invention

[0004] The utility model proposes a mold ejection device, which can quickly squeeze out the product in the mold through the cooperation of a power component and an ejection component, and can buffer the impact force received by the product.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A mold ejection device includes a mounting plate and a power component. A square groove is opened on the mounting plate, a threaded rod is rotatably installed in the square groove, and a pair of sliders are threadedly installed on the threaded rod.

[0007] The power assembly is arranged at the bottom of the mounting plate. The power assembly includes a fixed plate and a horizontal plate. An air cylinder is installed at the bottom of the fixed plate. The output end of the air cylinder is connected to the surface of the horizontal plate. A pair of vertical rods are vertically installed on the horizontal plate. The pair of vertical rods cooperate with the fixed plate and pass through the fixed plate. A pair of ejecting assemblies are arranged at the bottom of the horizontal plate.

[0008] The ejecting assembly includes a cavity cylinder and a movable column. A spring is arranged inside the movable column. The movable column cooperates with the cavity cylinder and contacts the top end of the movable column. A ejecting head is arranged at the bottom end of the movable column.

[0009] Preferably, a pair of square movable sleeves are slidably fitted on the mounting plate. The pair of square movable sleeves are connected to the tops of a pair of sliders. Connecting plates are installed at the bottoms of the pair of square movable sleeves. A clamp is arranged at the bottom of the connecting plate.

[0010] Preferably, one end of the threaded rod passes through the square groove to one side of the mounting plate. A motor is arranged on one side of the mounting plate. The output end of the motor is connected to one side of the threaded rod. Opposite threads are symmetrically formed on the surface of the threaded rod.

[0011] Preferably, a pair of through holes are formed in the fixed plate. The pair of vertical rods cooperate with the pair of through holes.

[0012] Preferably, two pairs of limiting and movable grooves are formed in the cavity cylinder. Two pairs of limiting blocks are arranged on the surface of the movable column. The limiting blocks cooperate with the limiting and movable grooves.

[0013] Preferably, a feed inlet and a pair of ejecting rods are arranged on the mold. The feed inlet is communicated with the inside of the mold. Card slots are formed on both sides of the mold. The pair of clamps cooperate with the pair of card slots. The ejecting rods and the ejecting assemblies are in the same vertical plane.

[0014] The utility model has the following beneficial effects:

[0015] 1. Through the structural design of the power assembly of the utility model, the output end of the air cylinder is used to push the horizontal plate to move downward, so that a pair of ejecting heads in the pair of ejecting assemblies at the bottom of the horizontal plate contact and extrude a pair of ejecting rods on the mold, thereby being able to quickly extrude and eject the products in the mold, effectively improving the demolding efficiency of the products, enabling the products in the mold to be evenly stressed during demolding, avoiding deformation of the products, and ensuring the quality of the products.

[0016] 2. Through the structural design of the ejecting assembly of the utility model, the ejecting head at the bottom of the ejecting assembly contacts and extrudes the ejecting rod on the mold, so that the movable column slides upward inside the cavity cylinder. The resilience of the spring is used to offset the force transmitted by the movable column, so that the movable column slides upward in the cavity cylinder at a reduced speed, thereby being able to avoid directly and rigidly ejecting the products by the ejecting head on the ejecting rod, buffering the impact force received by the products, ensuring that no marks appear on the surface of the products due to extrusion, and effectively reducing the defective rate of the products. Brief Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the ejection device;

[0018] Figure 2 It is a schematic structural diagram of the top of the ejection device;

[0019] Figure 3 It is a schematic structural diagram of the power component and the ejection component;

[0020] Figure 4 It is a schematic structural diagram of the ejection device and the mold;

[0021] Figure 5 It is a schematic structural diagram of the mold;

[0022] Figure 6 It is a schematic assembly structural diagram of the ejection component;

[0023] Figure 7 It is a schematic structural diagram of the cavity cylinder.

[0024] In the figure: 1. mounting plate; 101. square groove; 2. threaded rod; 201. slider; 3. motor; 4. square movable sleeve; 5. connecting plate; 501. caliper; 6. power component; 601. fixing plate; 6011. through hole; 602. pneumatic push rod; 603. cross plate; 604. vertical rod; 7. ejection component; 701. cavity cylinder; 7011. limiting movable groove; 702. spring; 703. movable column; 7031. limiting block; 704. ejection head; 8. mold; 801. clamping groove; 802. ejecting rod; 803. feeding port. Detailed Embodiments

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0026] Refer to Figure 1-7, a mold ejection device, comprising a mounting plate 1, a power assembly 6 and a mold 8. A square groove 101 is formed in the mounting plate 1. A threaded rod 2 is rotatably mounted in the square groove 101. A pair of sliders 201 are threadedly mounted on the threaded rod 2. A pair of square movable sleeves 4 are slidably fitted on the mounting plate 1. The top of the pair of square movable sleeves 4 is connected to the top of the pair of sliders 201. A connecting plate 5 is mounted at the bottom of each of the pair of square movable sleeves 4. A clamp 501 is provided at the bottom of the connecting plate 5. One end of the threaded rod 2 passes through the square groove 101 to one side of the mounting plate 1. A motor 3 is provided on one side of the mounting plate 1. The output end of the motor 3 is connected to one side of the threaded rod 2. Opposite threads are symmetrically formed on the surface of the threaded rod 2, which can make the pair of square movable sleeves 4 move towards each other. The ejection device is stably fixed on the mold 8 through the pair of clamps 501. The mold 8 is provided with a feed inlet 803 and a pair of ejector rods 802. The feed inlet 803 is communicated with the inside of the mold 8. A pair of clamping grooves 801 are formed on both sides of the mold 8. The pair of clamps 501 cooperate with the pair of clamping grooves 801. The ejector rods 802 and the ejection assembly 7 are in the same vertical plane.

[0027] The power assembly 6 is arranged at the bottom of the mounting plate 1. The power assembly 6 includes a fixing plate 601 and a cross plate 603. A pneumatic push rod 602 is mounted at the bottom of the fixing plate 601. The output end of the pneumatic push rod 602 is connected to the surface of the cross plate 603. A pair of vertical rods 604 are vertically mounted on the cross plate 603. The pair of vertical rods 604 cooperate with the fixing plate 601 and pass through the fixing plate 601. A pair of through holes 6011 are formed in the fixing plate 601. The pair of vertical rods 604 cooperate with the pair of through holes 6011. By providing the pair of vertical rods 604, the cross plate 603 can be kept stable during movement, ensuring that the pair of ejection assemblies 7 are aligned with the pair of ejector rods 802. A pair of ejection assemblies 7 are provided at the bottom of the cross plate 603.

[0028] When the product in the mold 8 needs to be taken out after cooling and forming, place the ejector above the middle of the mold 8. Align a pair of calipers 501 with a pair of card slots 801. Then start the motor 3. The output end of the motor 3 drives the threaded rod 2 to rotate in the square groove 101, causing a pair of sliders 201 to move towards each other in the square groove 101, thereby driving a pair of square movable sleeves 4 to slide on the surface of the mounting plate 1, enabling the pair of calipers 501 to cooperate with the pair of card slots 801 to fix the ejector device. After stably setting the ejector device in the mold 8, start the pneumatic push rod 602 at the center of the top of the fixed plate 601, so that the output end of the pneumatic push rod 602 pushes the cross plate 603 downward, and through the cooperation of a pair of vertical rods 604 and a pair of through holes 6011, the cross plate 603 can move downward smoothly. By the downward movement of the cross plate 603, a pair of ejector heads 704 in a pair of ejector assemblies 7 at the bottom of the cross plate 603 contact and exert pressure on a pair of ejector rods 802 on the mold 8, so as to quickly extrude and eject the product in the mold 8, effectively improving the demolding efficiency of the product, enabling the product in the mold 8 to be evenly stressed during demolding, avoiding deformation of the product, and ensuring the quality of the product.

[0029] The ejector assembly 7 includes a cavity cylinder 701 and a movable column 703. A spring 702 is arranged in the movable column 703. A damping pad is arranged at the top end of the spring 702. The damping pad is connected to the inside of the cavity cylinder 701, which can ensure that the spring 702 can stably contract and rebound in the cavity cylinder 701. The movable column 703 cooperates with the cavity cylinder 701 and contacts the top end of the movable column 703. Two pairs of limit movable grooves 7011 are opened in the cavity cylinder 701. Two pairs of limit blocks 7031 are arranged on the surface of the movable column 703. The limit blocks 7031 cooperate with the limit movable grooves 7011. The movable column 703 can be restricted in the cavity cylinder 701 through the cooperation of the limit blocks 7031 and the limit movable grooves 7011. The bottom end of the movable column 703 is provided with an ejector head 704. A rubber pad is arranged on the surface of the ejector head 704, which can play a role in auxiliary buffering and protection.

[0030] During the process of ejecting the product in the mold 8, when the cross plate 603 pushes a pair of ejecting components 7 downward, the ejecting head 704 at the bottom of the ejecting component 7 contacts and squeezes the ejecting rod 802 on the mold 8. The ejecting head 704 receives a reaction force through the ejecting rod 802, and the ejecting head 704 transmits the reaction force to the movable column 703. Through the cooperation of two pairs of limit blocks 7031 and two pairs of limit movable grooves 7011, the movable column 703 slides upward inside the cavity cylinder 701, so that the top end of the movable column 703 contacts the bottom end of the spring 702 and squeezes the spring 702. The spring 702 contracts under force, and the reaction force transmitted by the movable column 703 is offset by the resilience of the spring 702, so that the movable column 703 decelerates and moves upward in the cavity cylinder 701, realizing the buffering of the extrusion force on the ejecting rod 802. Thus, it can be avoided that the ejecting head 704 directly and forcefully ejects the product against the ejecting rod 802, the impact force received by the product can be buffered, it is ensured that no marks will appear on the surface of the product due to extrusion, and the defective rate of the product is effectively reduced.

[0031] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A mold ejection device, comprising a mounting plate (1), characterized in that: The mounting plate (1) is provided with a square groove (101), a threaded rod (2) is rotatably mounted in the square groove (101), and a pair of sliding blocks (201) are threadably mounted on the threaded rod (2); It also includes a power assembly (6), the power assembly (6) is arranged at the bottom of the mounting plate (1), the power assembly (6) includes a fixed plate (601) and a transverse plate (603), a pneumatic push rod (602) is installed at the bottom of the fixed plate (601), the output end of the pneumatic push rod (602) is connected to the surface of the transverse plate (603), a pair of vertical rods (604) are vertically installed on the transverse plate (603), the pair of vertical rods (604) cooperate with the fixed plate (601) and pass through the fixed plate (601), and a pair of ejection assemblies (7) are arranged at the bottom of the transverse plate (603); The ejection assembly (7) comprises a cavity tube (701) and a movable column (703), wherein a spring (702) is arranged inside the movable column (703), the movable column (703) cooperates with the cavity tube (701) and contacts with the top end of the movable column (703), and an ejection head (704) is arranged at the bottom end of the movable column (703).

2. A mold ejection device according to claim 1, characterized in that: A pair of square movable sleeves (4) are slidably fitted on the mounting plate (1); the pair of square movable sleeves (4) are connected to the tops of a pair of sliders (201); a connecting plate (5) is installed at the bottom of the pair of square movable sleeves (4); and a caliper (501) is provided at the bottom of the connecting plate (5).

3. A mold ejection device according to claim 2, characterized in that: One end of the threaded rod (2) passes through the square groove (101) to one side of the mounting plate (1), a motor (3) is provided on one side of the mounting plate (1), an output end of the motor (3) is connected to one side of the threaded rod (2), and opposite threads are symmetrically provided on the surface of the threaded rod (2).

4. A mold ejection device according to claim 1, characterized in that: A pair of through holes (6011) is provided on the fixing plate (601), and a pair of vertical rods (604) cooperate with the pair of through holes (6011).

5. A mold ejection device according to claim 1, characterized in that: Two pairs of movable limiting grooves (7011) are provided in the cavity tube (701), and two pairs of movable limiting blocks (7031) are provided on the surface of the movable column (703), wherein the movable limiting blocks (7031) cooperate with the movable limiting grooves (7011).

6. A mold ejection device according to claim 1, characterized in that: The invention also comprises a mould (8), wherein the mould (8) is provided with a feed port (803) and a pair of ejector rods (802), wherein the feed port (803) is communicated with the interior of the mould (8), and both sides of the mould (8) are provided with slots (801), wherein a pair of clamps (501) cooperate with the pair of slots (801), and the ejector rods (802) and the ejector assembly (7) are in the same vertical plane.

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