CN220973209U - Automatic ejection die - Google Patents

Abstract

The utility model relates to the technical field of dies and discloses an automatic ejection die which comprises a movable die, a fixed die and an ejector plate connected to the movable die in a sliding manner, wherein a power piece is connected to the fixed die; the power piece is provided with a driving inclined plane, the matching piece is provided with a matching inclined plane which is in sliding fit with the driving inclined plane, and the maximum static friction force between the driving inclined plane and the matching inclined plane is larger than the ejection force of the ejector plate ejecting the product. The utility model solves the problems that a die ejection mechanism in the prior art cannot achieve low cost and high ejection efficiency.

Description

Automatic ejection die

Technical Field

The utility model relates to the technical field of dies, in particular to an automatic ejection die.

Background

In the existing injection mold, in the mold opening process, a ejector rod ejection mode or an oil cylinder ejection mode is generally adopted to push the ejector plate to move, so that the ejector plate pushes the ejector pin to move relative to the mold base, and the molded product is ejected and demolded. The ejection structure of the oil cylinder is adopted, so that the product demoulding can be accurately and rapidly finished, but the cost is high; by adopting the ejector rod ejection mode, in the die sinking stage, the movable die can eject the product after a distance is required to be moved, so that the production period is overlong, and the ejection mechanism is also required to be provided with parts such as springs for auxiliary reset, so that the structure is complex and the control precision is poor. Therefore, the existing mold ejection structure cannot better consider the cost, ejection efficiency, structure and the like, and influences the production of injection products.

Disclosure of utility model

The utility model aims to provide an automatic ejection die, which solves the problems that a die ejection mechanism in the prior art cannot achieve low cost and high ejection efficiency.

In order to solve the problems, the utility model adopts the following technical scheme: an automatic ejection die comprises a movable die, a fixed die and an ejector plate which is connected to the movable die in a sliding manner, wherein a power piece is connected to the fixed die; the power piece is provided with a driving inclined plane, the matching piece is provided with a matching inclined plane which is in sliding fit with the driving inclined plane, and the maximum static friction force between the driving inclined plane and the matching inclined plane is larger than the ejection force of the ejector plate ejecting the product.

The principle of the scheme is as follows: in the application, a power piece is connected to a fixed die, a matching piece is connected to a thimble plate, and when a movable die is close to the fixed die and is in a die closing state, a driving inclined plane and a matching inclined plane are mutually attached; when the product injection molding back die sinking, the movable mould moves to the direction of keeping away from the cover half, drives thimble board and cooperation spare synchronous motion when the movable mould removes for drive inclined plane and cooperation inclined plane are mutually supported tightly, because the biggest static friction between drive inclined plane and the cooperation inclined plane is greater than the ejecting force of the ejecting product of thimble board, therefore when the power spare begins to keep away from the cooperation spare, under the static friction effort between drive inclined plane and the cooperation inclined plane, the power spare can be through cooperation spare pulling thimble board together relative movable mould removal, thereby make the thimble board promote the thimble in the prior art to push out the product from the movable mould when the die sinking fast, realize the quick drawing of patterns of product.

Along with the movable mould further keeps away from the cover half, the thimble board moves to the state that offsets tightly with the movable mould under the pulling force effect of power spare and cooperation spare, and under the reverse holding power of cover half this moment, the thimble board can't continue to move relatively the movable mould, and thimble board and cooperation spare can only keep away from the power spare with the movable mould is synchronous, because at least one is the elasticity piece that resets in cooperation spare and the power spare, when receiving powerful effort, the elasticity piece that resets can take place elastic deformation under the interact effort of drive inclined plane and cooperation inclined plane. Therefore, along with the continuous power piece that keeps away from of mating piece, change from relative stationary state to relative slip between drive inclined plane and the mating inclined plane, and mating piece or power piece take place elastic deformation and make the distance between power piece and the mating piece increase, drive the inclined plane and slide and make the mating piece break away from with the power piece voluntarily at last mating piece and power piece have no connection again, the movable mould can further keep away from the cover half and make and leave enough big space between movable mould and the cover half, so that the product after the drawing of patterns is taken away or automatic dropping.

The beneficial effect of this scheme is: according to the application, by arranging the power piece and the matching piece, in the process of opening the movable die away from the fixed die, the ejector plate is automatically pulled by virtue of the static friction force acting force between the driving inclined plane and the matching inclined plane to rapidly finish the demoulding of a product; and after the product demoulding process, along with the moving die being far away from the fixed die in-process, the elastic reset piece in the matching piece and the power piece automatically generates elastic deformation under the action force of relative sliding friction of the matching inclined plane and the driving inclined plane, so that the matching piece and the power piece are automatically separated when the moving die continuously moves, the power piece cannot cause blocking interference to the continuous die opening process of the moving die, and the moving die can be far away from the fixed die in a larger distance, so that the product is convenient to separate. The whole ejection mechanism is simple in structure, convenient to install and quite simple and convenient to operate, products can be ejected out rapidly in the movable die opening process, the production period of the products is shortened, the efficiency of product molding and manufacturing is improved, and the die cost, the product molding efficiency and the structural complexity of the ejection mechanism are well balanced.

Preferably, as an improvement, a drag hook resetting piece is arranged between the power piece and the matching piece, and a thimble resetting piece is arranged between the fixed die and the thimble plate.

In the scheme, the draw hook reset piece is arranged between the power piece and the matching piece, so that in the process of closing the movable die and the fixed die, the matching inclined surface on the matching piece is driven by the draw hook reset piece to form a matching relationship with the driving inclined surface on the power piece again, and the automatic ejection function is realized in the next molding cycle; meanwhile, a thimble resetting piece is arranged between the fixed die and the thimble plate, and the thimble plate is driven to reset in the die assembly process by the thimble resetting piece, so that the injection molding of the product is accurately and stably carried out.

Preferably, as an improvement, the drag hook reset piece is a main guide inclined plane which is arranged on the matching piece and is close to one end of the fixed die and matched with the power piece, and the thimble reset piece is a reset rod fixedly connected to the thimble plate.

In the scheme, the main guide inclined plane is arranged on the matching piece, and the main guide inclined plane can push the power piece and the elastic resetting piece in the matching piece to elastically deform by utilizing the guide effect of the main guide inclined plane when the movable die and the fixed die are closed and the matching piece is abutted against the power piece, so that the driving inclined plane and the matching inclined plane slide to a mutually matched state; in addition, through reset lever and cover half contact for the reset lever is accurate to reset under the cover half thrust effect.

Preferably, as an improvement, the power piece is a power draw hook fixedly connected to the fixed die, and the matching piece is a matching draw hook fixedly connected to the ejector plate.

In this scheme, set up power spare as power drag hook, set up the cooperation spare as cooperation drag hook, adopt drag hook complex structure, the simple structure of power spare and cooperation spare, it is convenient to connect.

Preferably, as an improvement, the power draw hook is a stainless steel draw hook, and the matched draw hook is an elastic reset piece.

In the scheme, the power draw hook is a stainless steel draw hook, cannot generate elastic deformation in the use process, is fixedly connected to the fixed die, cannot move in the die opening or die closing process generally, and has good strength; the cooperation drag hook is elastic reset piece, can take place elastic deformation in the use to power drag hook connection or break away from, and the cooperation drag hook can follow thimble board and movable mould removal in the use, sets up the cooperation drag hook into elastic reset piece, can take place elastic deformation when cooperation drag hook and other parts contact, can reduce the risk that cooperation drag hook and other parts rigid collision damaged to a certain extent.

Preferably, as a modification, an included angle between the mating surface between the mating inclined surface and the driving inclined surface and the relative sliding direction of the power piece and the mating piece is 20-40 degrees.

Because the maximum static friction force of the matching inclined surface relative to the driving inclined surface when the matching piece is far away from the power piece is related to the matching inclined angle of the matching inclined surface and the driving inclined surface and the static friction coefficient, in the scheme, the matching angle between the matching inclined surface and the driving inclined surface is set between 20-40 degrees, and the maximum static friction force between the matching inclined surface and the driving inclined surface is controlled in a reasonable range, so that the power piece can pull the matching piece and the thimble plate to move to finish product demoulding, and the difficulty in separating the matching piece from the power piece due to overlarge matching angle can be avoided.

Preferably, as a modification, the overlapping fitting width of the fitting inclined surface and the driving inclined surface in the sliding direction perpendicular to the power member and the fitting member is 5-15mm.

In this scheme, with the distance setting that cooperation inclined plane breaks away from with the drive inclined plane to 5-15mm, according to the length size of mould size structure and cooperation spare, make the cooperation spare take place the elastic deformation of less angle and can make cooperation spare and power spare break away from each other, be favorable to optimizing the mould structure.

Preferably, as an improvement, the contact distance between the reset rod and the fixed die is smaller than the contact distance between the ejector pin on the ejector pin plate and the fixed die.

In this scheme, the contact distance between reset lever and the cover half is less than the contact distance between thimble and the cover half to at movable mould and cover half compound die in-process, reset lever contacts with the cover half earlier and promotes the thimble board to reset, avoids thimble and cover half to bump and causes thimble bending damage etc..

Preferably, as an improvement, the movable mould is provided with a sliding hole, and the reset rod is in sliding fit with the sliding hole.

In this scheme, the slide hole provides direction and spacing to the slip of reset lever for the reset lever can promote the thimble board reset more steadily and accurately.

Preferably, as an improvement, the power piece and the matching piece are a group of ejection control groups, a plurality of groups of ejection control groups are arranged between the movable die and the fixed die, and the plurality of groups of ejection control groups are positioned around the outer walls of the movable die and the fixed die.

In this scheme, through setting up multiunit ejection control group for the thimble board can be pulled more steadily and make the product drawing of patterns, effectively promotes the stability of whole mould ejection mechanism.

Drawings

Fig. 1 is a schematic diagram of a first embodiment of the present utility model.

Fig. 2 is a schematic diagram of the power retractor of fig. 1 disengaged from the mating retractor.

Fig. 3 is a partial enlarged view at a in fig. 2.

Detailed Description

The following is a further detailed description of the embodiments:

Reference numerals in the drawings of the specification include: the device comprises a fixed die 1, a movable die 2, an ejector plate 3, an ejector pin 4, a power draw hook 5, a driving inclined plane 501, a secondary guide inclined plane 502, a matching draw hook 6, a matching inclined plane 601, a main guide inclined plane 602 and a reset rod 7.

Example 1

This embodiment is shown in fig. 1-3: the utility model provides an automatic ejecting mould, includes cover half 1, movable mould 2 and horizontal sliding connection thimble board 3 on the movable mould 2, fixedly connected with is used for ejecting thimble 4 of product on the one side towards cover half 1 on the thimble board 3, and thimble 4 inserts in the movable mould 2, and when movable mould 2 and cover half 1 compound die, the tip and the die joint of thimble 4 flush. It should be noted that, in the present embodiment, the fixed mold 1 and the movable mold 2 are located on the same plane, and the movable mold 2 completes the mold opening and closing process by sliding laterally, in other embodiments other than the present embodiment, the relative positions of the movable mold 2 and the fixed mold 1 may be adaptively changed, for example, the fixed mold 1 is disposed below the movable mold 2, and the movable mold 2 completes the mold opening and closing process by sliding vertically, which does not need to set the orientations of the movable mold 2 and the fixed mold 1 in a row any more, which belongs to the protection scope of the present embodiment.

The fixed die 1 is connected with a power piece, the ejector plate 3 is connected with a matching piece matched with the power piece, and at least one of the matching piece and the power piece is an elastic resetting piece. In this embodiment, the power piece is the power drag hook 5 on fixed mould 1 through screw fixed connection, and power drag hook 5 is the stainless steel drag hook of stainless steel material, and only the cooperation piece is the elasticity piece that resets, and the cooperation piece is the cooperation drag hook 6 on thimble board 3 through screw fixed connection, and cooperation drag hook 6 adopts spring steel to make for cooperation drag hook 6 can take place elastic deformation when receiving the exogenic action.

Referring to fig. 2 and 3, a driving inclined plane 501 is opened at one end of the power draw hook 5 far away from the fixed die 1, a matching inclined plane 601 matched with the driving inclined plane 501 is opened at one end of the matching draw hook 6 far away from the ejector pin plate 3, when the movable die 2 and the fixed die 1 are in a die closing state, the matching inclined plane 601 and the driving inclined plane 501 are in a mutually matched state, and when the movable die 2 is opened, the movable die 2 drives the ejector pin 4, the ejector pin plate 3 and the matching draw hook 6 to be far away from the power draw hook 5, and the matching inclined plane 601 and the driving inclined plane 501 are mutually abutted to generate static friction force. In this embodiment, the maximum static friction between the driving inclined plane 501 and the mating inclined plane 601 is greater than the ejection force of the ejector plate 3 pushing the ejector pin 4 out of the molded product on the movable mold 2.

As shown in fig. 2 and 3, in this embodiment, in order to make the maximum static friction between the engaging inclined surface 601 and the driving inclined surface 501 large enough to push the product to release, the angle between the engaging surface between the engaging inclined surface 601 and the driving inclined surface 501 and the relative sliding direction of the power draw hook 5 and the engaging draw hook 6 is set to 20-40 °, that is, the angle range of θ in fig. 2 is 20-40 °. Meanwhile, in order to make the engaging inclined plane 601 and the driving inclined plane 501 disengage from each other within a reasonable elastic deformation angle range of the engaging hook 6, in this embodiment, the value of the overlapping engaging width of the engaging inclined plane 601 and the driving inclined plane 501 along the direction perpendicular to the sliding direction of the engaging hook 6 relative to the power hook 5 is set within a range of 5-15mm, that is, the value of D in fig. 2 is 5-15mm, in this embodiment, the value of θ is preferably 30 °, and the value of D is preferably 10mm.

With reference to fig. 1 and 3, a drag hook resetting piece is arranged between the power drag hook 5 and the matched drag hook 6, and a thimble 4 resetting piece is arranged between the fixed mold 1 and the thimble plate 3. Wherein, the drag hook reset piece is for seting up the main guide inclined plane 602 on the one end that cooperation drag hook 6 kept away from thimble board 3, and main guide inclined plane 602 and the one end that power drag hook 5 kept away from cover half 1 cooperate, and in order to make cooperation drag hook 6 and power drag hook 5 reset better, open at the one end that power drag hook 5 kept away from cover half 1 have with main guide inclined plane 602 complex vice guide inclined plane 502. The reset piece of thimble 4 is reset lever 7 on thimble board 3 through screw fixed connection, opens on the movable mould 2 has the slide opening, reset lever 7 and slide opening sliding fit, and in order to play effective guard action to thimble 4, in this embodiment, the contact distance between the left end of reset lever 7 and cover half 1 is less than the contact distance between thimble 4 left end and cover half 1 to in the compound die process, reset lever 7 promotes thimble board 3 to reset before thimble 4 contacts with cover half 1, avoids thimble 4 and cover half 1 collision damage.

In this embodiment, the matched drag hook 6 and the power drag hook 5 that are matched with each other form a group of ejection control groups, a plurality of groups of ejection control groups are arranged between the movable mold 2 and the fixed mold 1, and the ejector plate 3 is pushed and pulled to move simultaneously by using the plurality of groups of ejection control groups, so that the stability of the ejector plate 3 pushing the ejector pins 4 to eject products is improved. In this embodiment, the number of ejection control groups is four, and four ejection control groups are equally divided on two sides of the movable mold 2 and the fixed mold 1, so that two opposite sides of the ejector plate 3 are subjected to two tensile force action points, and the ejector plate 3 is ensured to stably push the product to be demolded in the product demolding process.

The specific implementation process is as follows:

When the movable die 2 and the fixed die 1 are in a die closing state, the driving inclined plane 501 and the matching inclined plane 601 are in a fitting and matching state, at the moment, injection molding materials are injected into a cavity surrounded by the movable die 2 and the fixed die 1, after pressure maintaining and cooling, products are molded in the cavity, then the movable die 2 is pushed away from the fixed die 1 by using external force to open the die, when the movable die 2 starts to be away from the fixed die 1, the movable die 2 drives the products, the ejector pins 4, the ejector pin plate 3 and the matching drag hook 6 synchronously move away from the power pull rod, at the moment, the matching inclined plane 601 and the driving inclined plane 501 mutually abut against each other to have a relative sliding trend, and the maximum static friction force between the driving inclined plane 501 and the matching inclined plane 601 is larger than the ejection force of the ejector pin plate 3 to drive the ejector pin 4 to eject the products, so that the matching inclined plane 601 is static relative to the driving inclined plane 501, at the moment, the matching drag hook 6 generates a pulling force to the ejector pin plate 3 to push the ejector pin 4 to move relative to the movable die 2, so that the ejector pin 4 is pushed by the ejector pin 2 to eject the products from the movable die 2, and automatic demolding of the products is realized.

After the demolding of the product is completed, along with the fact that the movable die 2 is continuously far away from the fixed die 1, the ejector plate 3 is contacted with the movable die 2 and is abutted against (namely, the relative position state of the ejector plate 3 and the movable die 2 in fig. 2), at the moment, the ejector plate 3 cannot continuously slide relative to the movable die 2, so that the matched draw hook 6 can only follow the ejector plate 3 and the movable die 2 to be far away from the fixed die 1 together, at the moment, the force between the matched inclined plane 601 and the driving inclined plane 501 is continuously increased, the matched inclined plane 601 and the driving inclined plane 501 are finally made to slide relatively, under the action of the inclined plane, the matched draw hook 6 is stressed to be elastically deformed, and finally, along with the fact that the matched draw hook 6 is continuously far away from the power draw hook 5, the matched draw hook 6 and the power draw hook 5 are automatically separated (namely, the state shown in fig. 2).

When the product is removed from the mold or automatically falls, the movable mold 2 approaches the fixed mold 1 to gradually mold the product, when the main guide inclined plane 602 contacts with the auxiliary guide inclined plane 502 and abuts against the auxiliary guide inclined plane, the matching drag hook 6 elastically deforms again under the action of the main guide inclined plane 602 and the auxiliary guide inclined plane 502, and when the movable mold 2 and the fixed mold 1 complete mold closing, the matching inclined plane 601 and the driving inclined plane 501 are reset to the fitting state again so as to perform product molding of the next cycle.

Example two

The second embodiment differs from the first embodiment in that: in the first embodiment, only the matching drag hook 6 is an elastic reset piece, in this embodiment, the matching drag hook 6 and the power drag hook 5 can be both set to be elastic reset pieces made of spring steel, so as to reduce the separation of the matching drag hook 6 and the power drag hook 5 and the rigid blocking in the matching process; meanwhile, in order to enable a sufficiently large maximum static friction force to be generated between the mating inclined surface 601 and the driving inclined surface 501, the value of θ is preferably 40 ° and the value of D is preferably 15mm in the present embodiment.

The foregoing is merely exemplary of the present utility model, and specific technical solutions and/or features that are well known in the art have not been described in detail herein. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the technical solution of the present utility model, and these should also be regarded as the protection scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the practical applicability of the patent. The protection scope of the present utility model is subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.

Claims (10)

1. The utility model provides an automatic ejecting mould, includes movable mould, cover half and sliding connection's thimble board on the movable mould, its characterized in that: the fixed die is connected with a power piece, the ejector plate is connected with a matching piece matched with the power piece, and at least one of the matching piece and the power piece is an elastic resetting piece; the power piece is provided with a driving inclined plane, the matching piece is provided with a matching inclined plane which is in sliding fit with the driving inclined plane, and the maximum static friction force between the driving inclined plane and the matching inclined plane is larger than the ejection force of the ejector plate ejecting the product.

2. An automatic ejection die as in claim 1, wherein: and a drag hook resetting piece is arranged between the power piece and the matching piece, and a thimble resetting piece is arranged between the fixed die and the thimble plate.

3. An automatic ejection die as in claim 2, wherein: the draw hook reset piece is a main guide inclined plane which is arranged on the matching piece and is close to one end of the fixed die and matched with the power piece, and the thimble reset piece is a reset rod fixedly connected to the thimble plate.

4. An automatic ejection die as in claim 1, wherein: the power piece is a power draw hook fixedly connected to the fixed die, and the matching piece is a matching draw hook fixedly connected to the ejector plate.

5. An automatic ejection die as in claim 4, wherein: the power draw hook is a stainless steel draw hook, and the matched draw hook is an elastic reset piece.

6. An automatic ejection die as in claim 1, wherein: the included angle between the matching surface between the matching inclined surface and the driving inclined surface and the relative sliding direction of the power piece and the matching piece is 20-40 degrees.

7. An automatic ejection die as in claim 1, wherein: the overlapping matching width of the matching inclined plane and the driving inclined plane along the sliding direction perpendicular to the power piece and the matching piece is 5-15mm.

8. An automatic ejection die according to claim 3, wherein: the contact distance between the reset rod and the fixed die is smaller than the contact distance between the ejector pin on the ejector pin plate and the fixed die.

9. An automatic ejection die as in claim 8, wherein: the movable mould is provided with a sliding hole, and the reset rod is in sliding fit with the sliding hole.

10. An automatic ejection die according to any one of claims 1-9, wherein: the power piece and the matching piece are a group of ejection control groups, a plurality of groups of ejection control groups are arranged between the movable die and the fixed die, and the plurality of groups of ejection control groups are positioned around the outer walls of the movable die and the fixed die.