CN212528463U

CN212528463U - Reset structure for returning ejector plate to original position

Info

Publication number: CN212528463U
Application number: CN202021103453.4U
Authority: CN
Inventors: 沈汝刚
Original assignee: Wuxi Yingteng Mould Technology Co ltd
Current assignee: Wuxi Yingteng Mould Technology Co ltd
Priority date: 2020-06-15
Filing date: 2020-06-15
Publication date: 2021-02-12
Anticipated expiration: 2030-06-15

Abstract

The utility model belongs to the technical field of the technique of casting former and specifically relates to a reset structure for making thimble board return normal position is related to, and it is including setting up the reset spring between lower mould and thimble board, reset spring is parallel with the thimble, still including setting up a plurality of release link on the thimble board, the release link is parallel with the thimble, and the release link top slides along self axis direction and wears to establish on the lower mould, and the release link top does not sink into the lower mould surface when the thimble board resets completely. The utility model discloses have the effect that stably, make the thimble board reset completely effectively.

Description

Reset structure for returning ejector plate to original position

Technical Field

The utility model belongs to the technical field of the technique of casting former and specifically relates to a reset structure for making thimble board return normal position is related to.

Background

The cast molding is also called (static) casting, and is to inject prepared casting raw materials (mainly comprising metal and plastic) into a mold and solidify the raw materials to obtain a product similar to a mold cavity. The pressure during casting molding is low, so that the method has many advantages, such as low requirements on the strength of a mold and equipment and low investment; the size of the product is less limited, and the product is suitable for producing large-scale products; low internal stress of the product and the like.

After the casting raw material is solidified into a solid workpiece from a liquid state in the cavity, the casting raw material is adhered to the inner wall of the cavity, and a certain pressure needs to be applied to the casting raw material to separate the workpiece from the cavity. Therefore, an ejector plate is often arranged in the casting mold, and a plurality of ejectors are arranged on the ejector plate. The thimble penetrates into the cavity and is abutted against the outer wall of the workpiece. When demoulding is needed, the oil cylinder arranged on the frame pushes the ejector pin plate to the workpiece, and drives each ejector pin to eject the workpiece out of the cavity.

Before the casting raw materials are injected into the cavity, the ejector pin plate and the ejector pins need to be reset until the tail ends of the ejector pins are flush with the inner surface of the cavity, so that the ejector pins are prevented from damaging the shape of the cavity. The ejector plate reset structure in the existing mold is mostly a reset spring, and taking a lower mold as an example, the reset spring is arranged between the ejector plate and the lower mold where the cavity is located. When the workpiece is demoulded, the ejector plate moves towards the lower die under the driving of the oil cylinder, the return spring is compressed, and elastic potential energy is stored. After the workpiece is demoulded, the thrust of the oil cylinder acting on the ejector plate is removed, the elastic potential energy stored on the reset spring is released, and the reset spring pushes the ejector plate open to reset the ejector plate and the ejector pin.

Since it is necessary to cancel the resistance force from the return spring, the pushing force required to move the ejector plate toward the workpiece is larger than the knockout force of the workpiece, which corresponds to an increase in the load of the oil cylinder. In consideration of the point, the elastic force of the return spring after the return spring is completely compressed cannot be too large, and the situation that the elastic force of the return spring is insufficient can occur at the moment, so that the ejector plate cannot be completely reset, and the defect exists.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a reset structure for making the thimble board return normal position, it has the effect that stably, makes the thimble board reset completely effectively to the not enough that prior art exists.

The above object of the present invention is achieved by the following technical solutions:

the utility model provides a reset structure for making thimble board return normal position, is including setting up the reset spring between lower mould and thimble board, reset spring is parallel with the thimble, still including setting up a plurality of release link on the thimble board, the release link is parallel with the thimble, and the release link top slides along self axis direction and wears to establish on the lower mould, and the release link top just immerses the lower mould surface when the thimble board resets completely.

By adopting the technical scheme, the reset rod is arranged on the lower die in a sliding and penetrating manner, and when the ejector plate is ejected out, the top end of the reset rod also penetrates out of the upper surface of the upper die; when the ejector pin plate is closed, the upper die is close to the lower die and presses down the reset rod after being abutted against the reset rod until the lower surface of the upper die is attached to the upper surface of the lower die, and at the moment, the top end of the reset rod just submerges into the upper surface of the lower die, and the ejector pin plate is stably and effectively reset completely.

The present invention may be further configured in a preferred embodiment as: the lower surface of going up the mould is equipped with a plurality of groups spout, each group the spout corresponds with each release link respectively, and every group spout is equipped with at least two, and the axis of spout is vertical, slides in the spout and is equipped with the baffle, has seted up vertical spacing groove on the lateral wall of spout, the spacing groove not with the lower surface intercommunication of last mould, the spacing inslot slides and is equipped with the stopper, the stopper links to each other with the baffle, the side laminating of baffle and release link.

By adopting the technical scheme, the baffle is arranged in the sliding groove in a sliding manner, and when the bottom end of the sliding groove is not shielded, the baffle slides out of the sliding groove downwards under the action of gravity until the limiting block abuts against the end face of the limiting groove; when the die is closed, the baffle plate is in contact with the reset rod before the upper die, and is always attached to the side surface of the top end of the reset rod in the process that the reset rod is pressed down by the upper die, so that the top end of the reset rod cannot shake, and the reset rod is prevented from being bent and clamped; after the baffle is contacted with the lower die, the baffle is pressed into the chute, so that the die assembly is not influenced.

The present invention may be further configured in a preferred embodiment as: the lower surface of going up the mould inlays and is equipped with a plurality of buffer spring, each buffer spring corresponds respectively with each group's spout respectively, and buffer spring sets up along vertical direction, and buffer spring is located between the notch of spout.

By adopting the technical scheme, when the die is closed, the buffer spring is firstly contacted with the top end of the reset rod, so that the impact on the reset rod is reduced; the buffer spring is embedded on the lower surface of the upper die, so that final die assembly is not influenced.

The present invention may be further configured in a preferred embodiment as: the lower surface of going up the mould inlays and is equipped with the installation piece, spout and buffer spring all set up on the installation piece.

Through adopting above-mentioned technical scheme, it is more convenient to process spout, assembly baffle and buffer spring on the installation piece, and can wholly dismouting.

The present invention may be further configured in a preferred embodiment as: and a guide inclined plane is arranged at one side of the bottom end of the baffle plate, which faces the reset rod.

Through adopting above-mentioned technical scheme, set up the guide inclined plane after, the baffle can laminate smoothly at release link top lateral wall.

The present invention may be further configured in a preferred embodiment as: and an ejection spring for driving the limiting block to move downwards is arranged in the limiting groove.

Through adopting above-mentioned technical scheme, when going up the mould and lifting, ejecting spring orders about the stopper and moves down, drives the baffle and follows spout bottom roll-off, and the difficult condition that the baffle card dies in the spout that appears improves the stability of device.

The present invention may be further configured in a preferred embodiment as: the connecting rods are arranged between the bottom ends of the baffles in the same group, the connecting rods are not opposite to the end faces of the reset rods, and grooves for containing the connecting rods are formed in the lower surfaces of the mounting blocks.

Through adopting above-mentioned technical scheme, the connecting rod is even as an organic whole with the baffle of group, if the release link has crooked trend, the baffle is difficult for buckling after receiving the lateral pressure that comes from the release link, can restrict the release link more stably.

The present invention may be further configured in a preferred embodiment as: the top end of the reset rod is embedded with a hard alloy block, and the top end of the hard alloy block is flush with the top end of the reset rod.

Through adopting above-mentioned technical scheme, the deformation of very little range probably appears after the release link receives the pressure that comes from last mould, thoroughly deforms easily in the long-time use, sets up carbide piece then can solve this problem, when prolonging release link life greatly, and the cost-push is less.

To sum up, the utility model discloses a following at least one useful technological effect:

1. the ejector pin plate is stably and effectively completely reset;

2. by arranging the baffle, the reset rod is limited by the baffle, is not easy to bend and clamp and can smoothly lift;

3. buffer spring and carbide ring can reduce the impact that the release link received, prolong the life of release link.

Drawings

FIG. 1 is a schematic view of the overall structure of the embodiment;

FIG. 2 is a schematic structural diagram for embodying the upper mold in the embodiment;

FIG. 3 is a schematic diagram showing the connection among the ejector plate, the return spring and the lower die in the embodiment;

FIG. 4 is a schematic diagram illustrating the connection relationship between the reset rod, the mounting block and the upper mold in the embodiment;

fig. 5 is a schematic structural diagram for embodying the mounting block in the embodiment.

In the figure, 1, a return spring; 2. a reset lever; 3. mounting blocks; 4. a lower die; 5. an ejector plate; 6. an upper die; 7. a thimble; 11. a limiting column; 12. a screw; 21. a hard alloy block; 31. a chute; 32. a baffle plate; 33. a limiting groove; 34. a limiting block; 35. a buffer spring; 36. a guide ramp; 37. ejecting a spring; 38. a connecting rod; 39. a groove; 310. a block body; 51. a thimble cover plate; 52. a thimble push plate; 53. a counterbore.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b):

referring to fig. 1 and 2, for the utility model discloses a structure that resets for making thimble board return normal position, including reset spring 1 and release link 2, the former is used for assisting thimble board 5 to reset, and the latter is used for guaranteeing thimble board 5 to reset completely.

Referring to fig. 3, the return spring 1 is disposed between the lower die 4 and the ejector plate 5 in the vertical direction, in parallel with the ejector pin 7. A vertical limiting column 11 penetrates through the inner side of the return spring 1, and a screw 12 is welded at the top end of the limiting column 11 and is screwed on the lower surface of the lower die 4 through the screw 12. Similarly, the top end of the return spring 1 is welded with the screw 12.

Referring to fig. 3, the ejector plate 5 is composed of an ejector cover plate 51 located at an upper layer and an ejector push plate 52 located at a lower layer, and a counterbore 53 is formed on the upper surface of the ejector cover plate 51. The bottom end of the reset spring 1 is always lower than the bottom end of the limiting column 11, is embedded in the counter bore 53 and abuts against the bottom surface of the counter bore 53.

When the ejector plate 5 moves toward the lower die 4, the return spring 1 is compressed and deformed, but the length thereof is always larger than that of the stopper post 11. When the ejector plate 5 is reset, the elastic force on the reset spring 1 is released, and certain pushing force is provided for the reset action of the ejector plate 5.

Referring to fig. 1 and 2, eight cylindrical release links 2 are provided, and the eight release links 2 are all arranged in a vertical direction. The bottom end of the reset rod 2 is bolted on the ejector plate 5, and the top of the reset rod 2 is arranged on the lower die 4 in a sliding and penetrating mode along the vertical direction. Correspondingly, eight installation blocks 3 are embedded on the lower surface of the upper die 6, the eight installation blocks 3 are respectively opposite to the eight reset rods 2, and the lower surfaces of the installation blocks 3 are flush with the lower surface of the upper die 6.

When the ejector plate 5 is ejected, the top end of the reset rod 2 also penetrates out of the upper surface of the upper die 6. When the die is closed, the upper die 6 is closed towards the lower die 4, and the mounting block 3 is driven to move downwards. The mounting block 3 presses down the reset rod 2 after being abutted against the reset rod 2 until the lower surface of the upper die 6 is attached to the upper surface of the lower die 4, at the moment, the top end of the reset rod 2 just submerges into the upper surface of the lower die 4, and the ejector plate 5 is also completely reset.

Referring to fig. 4, in consideration of the fact that the return arm 2 formed of a common steel material is easily deformed during a long-term compression, an annular hard alloy block 21 is embedded in an end surface of a tip end of the return arm 2. The top end of the hard alloy block 21 is flush with the top end of the reset rod 2, and when the top end of the reset rod 2 is slightly deformed, the hard alloy block 21 mainly bears the force.

Referring to fig. 4 and 5, the mounting block 3 is cylindrical, and has a top portion provided with a screw thread to be screw-coupled to the upper die 6.

Referring to fig. 4 and 5, the mounting block 3 is formed by splicing two blocks 310, the interface of the two blocks 310 is coplanar with the axis of the mounting block 3, the parts of the two blocks 310 except for the threads are symmetrical about the interface, and the two blocks 310 are bolted and fixed.

Referring to fig. 4 and 5, two sliding grooves 31 are formed in the lower surface of the mounting block 3, and the two sliding grooves 31 are both arranged in the vertical direction and are symmetrical with respect to the axis of the mounting block 3. The cross section of the sliding chute 31 is arc-shaped, the center of the circle of the sliding chute 31 coincides with the axis of the mounting block 3, the radius of the inner side wall of the sliding chute 31 is equal to the radius of the reset rod 2, and the sliding chute 31 is symmetrical about the boundary plane of the two block bodies 310.

Referring to fig. 4 and 5, a limiting groove 33 is formed in the outer side wall of the sliding groove 31, the limiting groove 33 is also arranged in the vertical direction, but the bottom end of the limiting groove 33 is not communicated with the lower surface of the mounting block 3. An arc-shaped baffle 32 is arranged in the sliding groove 31 in a sliding manner, a limiting block 34 is arranged in the limiting groove 33 in a sliding manner, and the baffle 32 and the limiting block 34 are welded and fixed.

When the bottom end of the sliding chute 31 is not shielded, the bottom of the baffle 32 can penetrate out of the sliding chute 31, and due to the existence of the limiting block 34, the baffle 32 cannot fall out of the sliding chute 31 completely. When the mounting block 3 moves down along with the upper die 6, the baffle 32 contacts with the reset rod 2 before the mounting block 3 and is attached to the side wall of the reset rod 2. When the bottom end of the baffle 32 abuts against the upper surface of the lower mold 4, the baffle 32 gradually retracts into the chute 31.

Referring to fig. 4 and 5, the inner edge of the bottom end of the baffle 32 is chamfered to form a guide slope 36. When the baffle 32 moves down, the baffle can be smoothly attached to the top end of the side wall of the reset rod 2.

Referring to fig. 4 and 5, an arc-shaped connecting rod 38 is welded between the opposite side walls at the bottom ends of the two baffles 32, and the connecting rod 38 and the baffles 32 form a complete circle in the horizontal direction. Correspondingly, the lower surface of the mounting block 3 is provided with two arc-shaped grooves 39, and two ends of each groove 39 are respectively communicated with the two sliding grooves 31. When the shutter 32 is retracted into the chute 31, the link 38 is also embedded in the groove 39.

Referring to fig. 4 and 5, in order to ensure that the retainer 32 can stably pass through the chute 31, an ejector spring 37 is provided in the stopper groove 33. The ejection spring 37 is arranged along the vertical direction, the top end of the ejection spring 37 abuts against the end face of the top end of the limiting groove 33, and the bottom end of the ejection spring 37 abuts against the limiting block 34. The ejecting spring 37 is always in a compressed state and always tends to drive the limiting block 34 to move downwards.

Referring to fig. 4 and 5, a buffer spring 35 is embedded in the center of the lower surface of the mounting block 3, and the buffer spring 35 is a nitrogen spring and is arranged in the vertical direction.

When the mounting block 3 moves down along with the upper die 6, the baffle 32 can be in contact with the reset rod 2 before the mounting block 3, and abuts against the top end face of the reset rod 2, so that the impact on the reset rod 2 is reduced. With the continuous downward movement of the mounting block 3, the piston rod of the buffer spring 35 is completely immersed into the lower surface of the mounting block 3, and the final mold closing is not affected.

The implementation principle of the embodiment is as follows:

the reset rod 2 is arranged on the lower die 4 in a sliding mode, and when the ejector plate 5 is ejected out, the top end of the reset rod 2 also penetrates out of the upper surface of the upper die 6. When the die is closed, the upper die 6 is closed towards the lower die 4, and the mounting block 3 on the lower surface of the upper die 6 is pressed down the reset rod 2 after being contacted with the reset rod 2 until the lower surface of the upper die 6 is attached to the upper surface of the lower die 4. At this time, the top end of the reset rod 2 just sinks into the upper surface of the lower die 4, and the ejector plate 5 is stably and effectively reset completely.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a reset structure for making thimble board return normal position, is including setting up reset spring (1) between lower mould (4) and thimble board (5), reset spring (1) is parallel with thimble (7), its characterized in that: still including setting up a plurality of release link (2) on thimble board (5), release link (2) are parallel with thimble (7), and release link (2) top is worn to establish on lower mould (4) along self axis direction slip, and release link (2) top submerges lower mould (4) surface just when thimble board (5) reset completely.

2. A return structure for returning an ejector plate to a home position according to claim 1, wherein: go up the lower surface of mould (6) and be equipped with a plurality of groups spout (31), each group spout (31) correspond with each release link (2) respectively, and every group spout (31) are equipped with at least two, and the axis of spout (31) is vertical, and it is equipped with baffle (32) to slide in spout (31), has seted up vertical spacing groove (33) on the lateral wall of spout (31), spacing groove (33) do not communicate with the lower surface of last mould (6), slide in spacing groove (33) and be equipped with stopper (34), stopper (34) link to each other with baffle (32), the side laminating of baffle (32) and release link (2).

3. A return structure for returning an ejector plate to a home position according to claim 2, wherein: go up the lower surface of mould (6) and inlay and be equipped with a plurality of buffer spring (35), each buffer spring (35) correspond respectively with each group spout (31), and buffer spring (35) set up along vertical direction, and buffer spring (35) are located between the notch of spout (31).

4. A return structure for returning an ejector plate to a home position according to claim 3, wherein: the lower surface of the upper die (6) is embedded with an installation block (3), and the sliding groove (31) and the buffer spring (35) are both arranged on the installation block (3).

5. A return structure for returning an ejector plate to a home position according to claim 4, wherein: one side of the bottom end of the baffle plate (32) facing the reset rod (2) is provided with a guide inclined surface (36).

6. A return structure for returning an ejector plate to a home position according to claim 4, wherein: an ejection spring (37) used for driving the limiting block (34) to move downwards is arranged in the limiting groove (33).

7. A return structure for returning an ejector plate to a home position according to claim 4, wherein: be equipped with connecting rod (38) between the bottom of same group baffle (32), connecting rod (38) are not just right with the terminal surface of release link (2), recess (39) that are used for holding connecting rod (38) are seted up to the lower surface of installation piece (3).

8. A return structure for returning an ejector plate to a home position according to claim 1, wherein: the top end of the reset rod (2) is embedded with a hard alloy block (21), and the top end of the hard alloy block (21) is flush with the top end of the reset rod (2).