CN219466737U - Secondary ejection mechanism of die - Google Patents

Abstract

The utility model relates to a secondary ejection mechanism of a die, which comprises a guide sleeve, an outer sleeve, a fixed seat, a limit rod, a spring and a functional piece, wherein the guide sleeve is sleeved on the outer sleeve; the guide sleeve is assembled on the upper ejector pin plate and is provided with an upper movable groove and a lower movable groove; the outer sleeve is assembled on the lower ejector pin plate and sleeved on the periphery of the guide sleeve, and is provided with an outer withdrawal groove with an opening facing to the side; the fixing base is assembled on the lower fixing plate, the limiting rod and the spring are axially assembled in the fixing base, the functional piece is sleeved on the periphery of the limiting rod in a relatively axially movable mode, an inner limiting groove is formed in the outer surface of the functional piece, the spring is used for elastically supporting the functional piece in the axially movable mode, the limiting rod and the functional piece can be relatively axially movably inserted into and withdrawn from the guide sleeve, an upper movable piece is arranged in the upper movable groove, and a lower movable piece is arranged in the lower movable groove. The utility model realizes the die structure with smooth die opening and closing, strong structural reliability and long service life of the die.

Description

Secondary ejection mechanism of die

Technical Field

The utility model relates to the technical field of injection molds, in particular to a secondary ejection mechanism of a mold.

Background

The ejection of the existing product has three modes of mechanical, hydraulic and pneumatic. Among them, the use of mechanical ejection is most common. In general, the product is removed from the mold and the ejection is completed in one step. However, because the product has a special shape or is required in production, if the product is still in the cavity after one ejection or cannot be automatically dropped, an ejection action needs to be added again, which is a secondary ejection. The secondary ejection can enable the ejection process to be smooth, and for some products with larger ejection stroke requirements, the force applied by the ejector pin during ejection can be reduced by utilizing the secondary ejection, so that defects on the products caused during ejection are avoided. How to design an ejection mode can enable the die to move smoothly and the processing cost to be low, and particularly, the problem that demolding is difficult to achieve for products with higher sizes needs to be solved. Therefore, as disclosed in the chinese patent publication No. CN215095409U, it relates to a secondary ejection demoulding mechanism for a mould, comprising a guide seat, a guide block, a push rod and a movable member; when the movable piece is positioned in a first cavity formed by the inner retreating groove and the mounting hole, the guide seat and the ejector rod are in a synchronous movable state; when the movable piece exits the inner retreating groove and moves into a second cavity formed by the mounting hole and the outer retreating groove, the guide seat is in an immovable state, and the ejector rod is in a movable state. According to the prior art, the ejector rod is of a split type structure, so that the assembly difficulty of the ejector rod in the ejection demoulding mechanism is simplified, the defect that a product is difficult to demould due to strong falling off of a reverse hook or high product height in the prior art is overcome, and the technical effects of smooth mould action and low processing cost are achieved. But in the running process of the prior art, the structure is too simple, so that the functions are single, the stability is weak, the elastic support is lacked, the buffering of the template in the mold opening and closing process can not be realized, and the mechanical service life is easily influenced.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a secondary ejection mechanism of a die aiming at the defects in the prior art.

The embodiment of the utility model provides a secondary ejection mechanism of a die, which comprises the following components: the device comprises a guide sleeve, a jacket, a fixed seat, a limiting rod, a spring and a functional piece; the guide sleeve is assembled on the upper ejector pin plate and is provided with an upper movable groove and a lower movable groove; the outer sleeve is assembled on the lower ejector pin plate and sleeved on the periphery of the guide sleeve in a relatively axially movable manner, and is provided with an outer return slot with an opening facing to the side; the fixing seat is assembled on the lower fixing plate, a limiting rod and a spring are axially assembled in the fixing seat, a functional piece is sleeved on the periphery of the limiting rod in a relatively axially movable manner, an inner limiting groove is formed in the outer surface of the functional piece, the spring is used for elastically supporting the functional piece in the axially movable manner, the limiting rod and the functional piece can be relatively axially movably inserted into and withdrawn from the guide sleeve, an upper movable piece is arranged in the upper movable groove, when the upper movable groove is in butt joint with the outer recession groove, the upper movable piece part moves to the outer recession groove to realize recession of the functional piece, a lower movable piece is arranged in the lower movable groove, and when the lower movable groove is in butt joint with the inner limiting groove, the lower movable piece part moves to the inner limiting groove to realize limiting of the functional piece; the upper ejector plate 7 is provided with an upper limit post 15 for limiting the lifting height of the upper ejector plate 7 and a lower limit post 22 for limiting the lifting height of the lower ejector plate 10.

In some embodiments, a baffle cover is provided on the mounting base and is positioned on the top surface of the spring to provide planar support.

In some embodiments, a limiting snap ring is provided on the fixing base to limit the upward travel of the baffle.

In some of these embodiments, an adjusting block is sleeved on the outer periphery of the limit rod in a relatively axially movable manner, and the adjusting block is arranged between the functional piece and the spring.

In some of these embodiments, the top of the stop lever is provided with a stop surface for preventing the function from being removed from the stop lever.

In some of these embodiments, the guide sleeve is mounted to the upper ejector plate by an elongated sleeve.

Compared with the related art, the secondary ejection mechanism of the mold provided by the embodiment of the utility model realizes smooth mold opening and closing, strong structural reliability and long mold service life of an injection mold structure by adopting a guide sleeve, an outer sleeve, a fixed seat, a limiting rod, a spring, a functional piece and lifting actions matched with an upper ejector plate and a lower ejector plate.

The details of one or more embodiments of the utility model are set forth in the accompanying drawings and the description below to provide a more thorough understanding of the other features, objects, and advantages of the utility model.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

fig. 1 is a diagram showing a structure of a mold clamping state of a secondary ejection mechanism of a mold according to an embodiment of the present utility model.

Fig. 2 is a diagram showing a structure of a mold in which a mold is ejected for the first time in an open state of a secondary ejection mechanism of a mold according to an embodiment of the present utility model.

Fig. 3 is a diagram showing a structure of a mold in which a mold is ejected for the second time in an open state of a mold ejection mechanism according to an embodiment of the present utility model.

In the figure, 1, a guide sleeve; 2. a jacket; 3. a fixing seat; 4. a limit rod; 5. a spring; 6. a functional member; 7. an upper ejector plate; 8. an upper movable groove; 9. a lower movable groove; 10. a lower ejector plate; 11. an outer backset groove; 12. a lower fixing plate; 13. adding a long sleeve; 14. an inner limit groove; 15. a limit column; 16. a baffle; 17. a limiting snap ring; 18. an adjusting block; 19. a limiting surface; 20. an upper movable member; 21. a lower movable member; 22. and a lower limit post.

Detailed Description

The present utility model will be described and illustrated with reference to the accompanying drawings and examples in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. All other embodiments, which can be made by a person of ordinary skill in the art based on the embodiments provided by the present utility model without making any inventive effort, are intended to fall within the scope of the present utility model. Moreover, it should be appreciated that while such a development effort might be complex and lengthy, it would nevertheless be a routine undertaking of design, fabrication, or manufacture for those of ordinary skill having the benefit of this disclosure, and thus should not be construed as having the benefit of this disclosure.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is to be expressly and implicitly understood by those of ordinary skill in the art that the described embodiments of the utility model can be combined with other embodiments without conflict.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "a," "an," "the," and similar referents in the context of the utility model are not to be construed as limiting the quantity, but rather as singular or plural. The terms "comprising," "including," "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to only those steps or elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. The terms "connected," "coupled," and the like in connection with the present utility model are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The term "plurality" as used herein means greater than or equal to two. "and/or" describes an association relationship of an association object, meaning that there may be three relationships, e.g., "a and/or B" may mean: a exists alone, A and B exist together, and B exists alone. The terms "first," "second," "third," and the like, as used herein, are merely distinguishing between similar objects and not representing a particular ordering of objects.

As shown in fig. 1-3, the secondary ejection mechanism of the die provided by the embodiment of the utility model comprises a guide sleeve 1, an outer sleeve 2, a fixed seat 3, a limit rod 4, a spring 5 and a functional piece 6; the guide sleeve 1 is assembled on the upper ejector plate 7, and the guide sleeve 1 is provided with an upper movable groove 8 and a lower movable groove 9 which penetrate through the inside and the outside; the outer sleeve 2 is assembled on the lower ejector plate 10 and sleeved on the periphery of the guide sleeve 1 in a relatively axially movable manner, the outer sleeve 2 is provided with an outer recession 11 with an opening facing side, and the upper movable part 20 is pushed when the outer sleeve 2 is lifted relative to the guide sleeve 1 due to the opening of the outer recession 11 facing side; the fixed seat 3 is assembled on the lower fixed plate 12, the limit rod 4 and the spring 5 are assembled in the fixed seat 3 along the axial direction, the functional piece 6 is sleeved on the periphery of the limit rod 4 in a relatively axially movable way, an inner limit groove 14 is arranged on the outer surface of the functional piece 6, the spring 5 is used for elastically supporting the functional piece 6 during the axial movement, the limit rod 4 and the functional piece 6 can be inserted into and withdrawn from the guide sleeve 1 in a relatively axially movable way, an upper movable piece 20 is arranged in the upper movable groove 8, the upper movable groove 8 is provided with a limit structure for limiting the upper movable piece 20 from being withdrawn from the upper movable groove 8, when the upper movable groove 8 is in butt joint with the outer limit groove 11, the upper movable piece 20 is partially moved to the outer limit groove 11 to realize the withdrawal of the functional piece 6, a lower movable piece 14 is arranged in the lower movable groove 9, and the lower movable groove 9 is provided with a limit structure for limiting the lower movable piece 21 from being withdrawn from the lower movable groove 9, and when the lower movable groove 9 is in butt joint with the inner limit groove 14, the lower movable piece 21 is partially moved to the inner limit groove 14 to realize the limit of the functional piece 6; the upper ejector plate 7 is provided with an upper limit post 15 for limiting the lifting height of the upper ejector plate 7 and a lower limit post 22 for limiting the lifting height of the lower ejector plate 10. The upper movable member is used for abutting the upper movable groove 8 with the outer recession groove 11 when the upper ejector plate 7 and the lower ejector plate 10 are not lifted relative to the lower fixed plate 12, namely, in a mold clamping state, and the upper movable member 20 moves from the upper movable groove 8 into the outer recession groove 11 to eliminate the obstruction to the relative axial movement of the functional member 6 to realize recession. The lower movable member 21 is used for abutting the lower movable groove 9 with the inner limit groove 14 when the upper ejector plate 7 and the lower ejector plate 10 are not lifted relative to the lower fixed plate 12, that is, in a mold clamping state, and the lower movable member 21 moves from the lower movable groove 9 into the inner limit groove 14 to limit the position of the functional member 6 in an axially movable manner to achieve the limit.

In this embodiment, the fixed base 3 is provided with a baffle 16 covering the top surface of the spring 5 to provide planar support for the functional element 6. The fixed seat 3 is provided with the limiting snap ring 17 to limit the upward travel of the baffle 16 so as to prevent the spring 5 from falling off, so that the spring 5 can be ensured to operate more stably, and the opening edge of the inner groove of the fixed seat 3 is provided with the limiting snap ring 17.

In order to enable the functional piece 6 to realize elastic reset and buffering under the action of the spring 5, the periphery of the limiting rod 4 is sleeved with an adjusting block 18 in a relatively axially movable manner, and the adjusting block 18 is arranged between the functional piece 6 and the spring 5, and the elastic pressure of buffering is adjusted by arranging the adjusting blocks 18 with different heights.

The top of the limit lever 4 of this embodiment is provided with a limit surface 19 for preventing the functional element 6 from being removed from the limit lever 4.

In this embodiment, the guide sleeve 1 is assembled on the upper ejector plate 7 through the lengthening sleeve 13, so that the distance between the upper ejector plate 7 and the lower ejector plate 10 can be prolonged, and the guide sleeve is suitable for higher demolding of injection products. The lengthening sleeve 13 is fixedly connected with the guide sleeve 1 through threads.

The working principle of the embodiment of the utility model is as follows:

when the die is in a die closing state: the functional element 6 is inserted into the guide sleeve 1, the upper movable element 20 is retracted into the outer retraction groove 11, and the lower movable element 21 is positioned in the inner limit groove 14 of the functional element 6.

When the die is ejected for the first time in the die opening state: the upper thimble plate 7 and the lower thimble plate 10 are synchronously driven, the guide sleeve 1, the outer sleeve 2, the upper movable piece and the lower movable piece are synchronously lifted, after moving to a certain position, the upper thimble plate 7 stops lifting due to the action of the upper limit post 15, the lower thimble plate continues 10 lifting, the upper movable piece 20 starts to horizontally move towards the direction of exiting the outer limit groove 11 under the touch of the outer limit groove 11, and the lower movable piece 21 starts to horizontally move towards the direction of exiting the inner limit groove 14 under the touch of the inner limit groove 14.

And (3) in the second ejection in the mold opening state: the lower thimble plate 10 is lifted in place under the action of the lower limit post 22 to stop the continuous lifting, and the guide sleeve 1, the upper movable piece 20 and the lower movable piece 21 are synchronously lifted in the continuous lifting process, so that the limit rod 4 is partially separated from the guide sleeve 1.

It should be understood by those skilled in the art that the technical features of the above-described embodiments may be combined in any manner, and for brevity, all of the possible combinations of the technical features of the above-described embodiments are not described, however, they should be considered as being within the scope of the description provided herein, as long as there is no contradiction between the combinations of the technical features.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (6)

1. A secondary ejection mechanism for a mold, comprising: the device comprises a guide sleeve (1), a jacket (2), a fixed seat (3), a limiting rod (4), a spring (5) and a functional piece (6); the guide sleeve (1) is assembled on the upper ejector plate (7), and the guide sleeve (1) is provided with an upper movable groove (8) and a lower movable groove (9); the outer sleeve (2) is assembled on the lower ejector plate (10) and sleeved on the periphery of the guide sleeve (1) in a relatively axially movable manner, and the outer sleeve (2) is provided with an outer recession groove (11) with an opening facing to the side; the fixing seat (3) is assembled on the lower fixing plate (12), the limiting rod (4) and the spring (5) are axially assembled in the fixing seat (3), the functional piece (6) is sleeved on the periphery of the limiting rod (4) in a relatively axially movable manner, an inner limiting groove (14) is formed in the outer surface of the functional piece (6), the spring (5) is used for elastically supporting the functional piece (6) in the axial movement manner, the limiting rod (4) and the functional piece (6) can be relatively axially movably inserted into and withdrawn from the guide sleeve (1), an upper movable piece is arranged in the upper movable groove (8), when the upper movable groove (8) is in butt joint with the outer limiting groove (11), the upper movable piece part moves to the outer limiting groove (11) to realize the withdrawal of the functional piece (6), a lower movable piece is arranged in the lower movable groove (9), and the lower movable piece (9) and the inner limiting groove (14) can relatively axially movably insert and withdraw from the guide sleeve (1), and the upper movable piece part (8) moves to the inner limiting groove (14) to realize the limit of the functional piece (6); the upper ejector plate (7) is provided with an upper limit column (15) for limiting the lifting height of the upper ejector plate (7) and a lower limit column (22) for limiting the lifting height of the lower ejector plate (10).

2. A secondary ejection mechanism for moulds according to claim 1, characterised in that the fixed base (3) is provided with a baffle (16) covering the top surface of the spring (5) to provide planar support.

3. A secondary ejection mechanism for moulds according to claim 2, characterized in that the fixing seat (3) is provided with a limit snap ring (17) to limit the upward travel of the baffle (16).

4. A secondary ejection mechanism for a mould according to claim 1, characterized in that the outer periphery of the limit lever (4) is sleeved with an adjusting block (18) relatively axially movable, the adjusting block (18) being arranged between the functional piece (6) and the spring (5).

5. A secondary ejection mechanism for a mould according to claim 1, characterized in that the top of the limit lever (4) is provided with a limit surface (19) for preventing the functional element (6) from coming out of the limit lever (4).

6. A secondary ejection mechanism for moulds according to claim 1, characterised in that the guiding sleeve (1) is fitted to the upper ejector plate (7) by means of an elongated sleeve (13).