CN218019930U

CN218019930U - Ejecting mould structure of kicking block small stroke that floats

Info

Publication number: CN218019930U
Application number: CN202221619037.9U
Authority: CN
Inventors: 王尚杰
Original assignee: Suzhou Zhongyue Baiyi Photoelectric Research And Development Co ltd
Current assignee: Suzhou Zhongyue Baiyi Photoelectric Research And Development Co ltd
Priority date: 2022-06-27
Filing date: 2022-06-27
Publication date: 2022-12-13
Anticipated expiration: 2032-06-27

Abstract

The utility model discloses an ejecting piece floats ejecting mould structure of little stroke, include: the ejection mechanism comprises an ejector pin plate group, ejector pins, a sliding block and a spring, wherein a stroke limiting cavity is arranged in the bottom plate, the lower end of the sliding block is movably arranged in the stroke limiting cavity, and the spring is arranged at the bottom of the sliding block and has upward elasticity on the sliding block; the ejector pin plate group is movably arranged between the bottom plate and the rear die and is attached to the upper end face of the sliding block in a pressing mode, the lower end of the ejector pin penetrates through the ejector pin plate group and is fixedly connected with the sliding block, and the upper end of the ejector pin penetrates through the rear die and is inserted into the rear die core. The ejecting mould structure of little stroke of kicking block floating can realize that little stroke is ejecting, improves kicking block life-span and product quality.

Description

Ejecting mould structure of kicking block small stroke that floats

Technical Field

The utility model relates to an injection mold technical field, in particular to ejecting mould structure of little stroke that kicking block floats.

Background

After the product is formed in the mold through injection molding, an ejection mechanism is needed to eject the product out, so that the product is separated from the mold core, and the product can be conveniently taken out from the mold.

An ejection mechanism adopted in a traditional mold is shown in fig. 1, the lower end of an ejector pin is fixed on an ejector plate, and the upper end of the ejector pin is inserted in a mold core and participates in product molding; when demoulding, the injection molding machine pushes the ejector pin plate through the push rod to drive the ejector pin to move upwards to eject the product. The movement distance of the ejector plate adopting the structure is fixed, generally about hundreds of millimeters, the ejection stroke of the ejector plate is long, but for a product with high appearance quality requirement, the ejection stroke is long, the friction between the ejector plate and the product can be increased, the problem of inaccurate return can also exist, after the ejector plate is used for a long time, the combination line of the product is very obvious, the appearance quality of the product is influenced, and the ejection requirement of the product can not be met.

Disclosure of Invention

An object of the utility model is to provide an ejecting piece small stroke ejecting mould structure that floats to overcome prior art top journey long, produce the defect that wearing and tearing, influence product appearance quality to the product easily.

The utility model discloses a solve the technical scheme that its technical problem adopted and be: the utility model provides an ejecting mould structure of little stroke that kicking block floats, includes: the ejection mechanism comprises an ejector pin plate group, ejector pins, a sliding block and a spring, wherein a stroke limiting cavity is arranged in the bottom plate, the lower end of the sliding block is movably arranged in the stroke limiting cavity, and the spring is arranged at the bottom of the sliding block and has upward elasticity on the sliding block; the ejector pin plate group is movably arranged between the bottom plate and the rear die and is attached to the upper end face of the sliding block in a pressing mode, the lower end of the ejector pin penetrates through the ejector pin plate group and is fixedly connected with the sliding block, and the upper end of the ejector pin penetrates through the rear die and is inserted into the rear die core.

As a further improvement of the utility model, the lower end of the sliding block is provided with an annular boss around the periphery, the stroke limiting cavity extends inwards along the inner wall to form limiting blocking platforms, and the limiting blocking platforms are distributed right above the annular boss at intervals; when the ejector pin plate group moves upwards to leave the sliding block, the sliding block moves upwards under the action of the elastic force of the spring until the annular boss stops upwards at the bottom of the limiting stop table.

As a further improvement, the utility model discloses a still include the front mould, set up the top of back mould, and can be relative the back mould is the mould action that opens and shuts, the back mold core with be formed with the die cavity that is used for the shaping product between the front mould.

As a further improvement, the back mold core is provided with a top block groove, the top block groove is internally provided with a top block capable of sliding up and down, at least part of the top block is in the cavity, and the top block is fixedly connected with the upper end of the thimble.

As a further improvement of the present invention, the thimble plate group comprises an upper thimble plate and a lower thimble plate, the lower thimble plate is provided with a first through hole, and the upper end of the sliding block extends into the first through hole; the upper ejector plate is provided with a second through hole which is coaxial and communicated with the first through hole, and the diameter of the second through hole is smaller than that of the first through hole, so that a step for pressing the upper end face of the sliding block is formed.

As a further improvement of the utility model, a pressing plate is fixed on the bottom plate, the pressing plate cover is closed the bottom in the spacing chamber of stroke, the lower terminal surface of sliding block supports on the pressing plate.

As a further improvement, the middle part of sliding block lower extreme is provided with the storage tank, the spring sets up in the storage tank, the one end elasticity of spring is supported and is put on the storage tank roof, its other end elasticity is supported and is put on the clamp plate.

As a further improvement of the utility model, the bottom plate with still be provided with the guide pillar between the back mould, thimble board group pass through the guide pin bushing with guide pillar sliding fit.

The beneficial effects of the utility model are that: the utility model provides a mould structure for ejecting small floating stroke of an ejector block, through installing a sliding block which can move up and down on a bottom plate, the sliding block is pressed by an ejector pin plate group, and the bottom of the sliding block is applied with the elasticity of a spring, the lower end of an ejector pin is fixed with the sliding block, the upper end of the ejector pin is fixed with the ejector block, in the ejection action process, after the ejector pin plate group leaves the sliding block, the sliding block drives the ejector block to eject a product through the ejector pin under the elastic action of the spring, the small stroke motion of the sliding block is limited through a stroke limiting cavity arranged on the bottom plate, the small stroke ejection is realized, the friction of the ejector block is reduced, the service life of the ejector block and the product quality are improved, and the ejection requirements of products with high appearance requirements and small requirements for combination line offset are met; meanwhile, the ejector block is used for ejecting the product, the contact area between the ejector block and the product is large, ejection is smooth, and deformation of the product is avoided.

Drawings

Fig. 1 is a schematic cross-sectional view of a conventional mold ejection structure of the present invention;

fig. 2 is a schematic structural view of the structure of the mold for ejecting the small floating stroke of the ejector block of the present invention;

fig. 3 is an enlarged view of a part a in the structure diagram 2 of the mold for ejecting the ejecting block with a small floating stroke according to the present invention;

fig. 4 is the structure diagram of the utility model discloses ejecting piece floats under the ejecting mould structure die sinking ejecting state of little stroke.

The following description is made with reference to the accompanying drawings:

1. a base plate; 101. a stroke limiting cavity; 102. a limiting stop table; 2. a rear mold;

3. a rear mold core; 301. a top block groove; 4. a thimble plate group; 401. an upper ejector plate; 402. a lower ejector plate; 403. a step; 5. a thimble; 6. a slider; 601. an annular boss; 602. a containing groove; 7. a spring; 8. a front mold; 9. a top block; 10. pressing a plate; 11. a guide post; 12. and (4) guiding a sleeve.

Detailed Description

The following description of the preferred embodiments of the present invention will be made in conjunction with the accompanying drawings.

Referring to fig. 2 to 4, the utility model provides an ejecting mould structure of kicking block unsteady little stroke, include: a bottom plate 1, a rear die 2, a front die 8 and an ejection mechanism arranged between the bottom plate 1 and the rear die 2. The rear die 2 is fixed above the bottom plate 1 through square iron, and a rear die core 3 is arranged on the rear die 2. The front die 8 is arranged above the rear die 2 and can do die opening and closing actions relative to the rear die 2, and a cavity for forming a product is formed between the front die 8 and the rear die core 3.

The ejection mechanism comprises an ejector pin plate group 4, an ejector pin 5, a sliding block 6 and a spring 7, a stroke limiting cavity 101 is arranged in the bottom plate 1, and the lower end of the sliding block 6 is movably arranged in the stroke limiting cavity 101. The spring 7 is disposed at the bottom of the slide block 6 and always has an upward elastic force to the slide block 6. The ejector pin plate group 4 is movably arranged between the bottom plate 1 and the rear mold 2 and is attached to the upper end face of the sliding block 6 in a pressing mode, the lower end of the ejector pin 5 penetrates through the ejector pin plate group 4 to be fixedly connected with the sliding block 6, and the upper end of the ejector pin 5 penetrates through the rear mold 2 and penetrates into the rear mold core 3.

Further, referring to fig. 3, the lower end of the sliding block 6 is provided with an annular boss 601 around the periphery, the stroke limiting cavity 101 extends inwards along the inner wall to form limiting stops 102, and the limiting stops 102 are distributed right above the annular boss 601 at intervals. When the ejector pin plate group 4 moves upward away from the sliding block 6, the sliding block 6 moves upward under the elastic force of the spring 7 until the annular boss 601 stops upward at the bottom of the limit stop 102.

In this embodiment, in a mold closing state, the distance between the limiting blocking table 102 and the annular boss 601 is 10mm, that is, the sliding distance of the sliding block 6 in the stroke limiting cavity 101 is 10mm, that is, the ejection stroke of the sliding block 6 driving the ejector pin 5 is 10mm, so that the amount of movement of the ejector pin 5 can be reduced, small-stroke ejection is realized, friction is reduced, product quality is improved, and ejection requirements on products with high appearance requirements and small requirements on breakage of a bonding wire are met.

Continuing to refer to fig. 3, the thimble plate group 4 includes an upper thimble plate 401 and a lower thimble plate 402, the lower thimble plate 402 is provided with a first through hole, the upper end of the sliding block 6 extends into the first through hole, and the upper end of the sliding block 6 is in clearance fit with the first through hole. The upper ejector plate 401 is provided with a second through hole coaxial and communicated with the first through hole, and the second through hole is used for the ejector pin 5 to pass through; the diameter of the second through-hole is smaller than that of the first through-hole, so that a step 403 for pressing the upper end surface of the slide block 6 is formed therebetween.

In addition, the top of the rear mold core 3 is provided with a top block groove 301, a top block 9 capable of sliding up and down is installed in the top block groove 301, the top block 9 is of a trapezoidal structure with a wide top and a narrow bottom, and at least part of the top block 9 is located in a mold cavity to participate in product molding. The upper end of the thimble 5 is fixedly connected with the ejector block 9 through a pin shaft and is used for driving the ejector block 9 to eject the product. This application is through adopting kicking block 9 to come ejecting product, and the area of contact of kicking block 9 and product is big, and is ejecting smooth and easy, has guaranteed that the product does not warp.

It should be noted that, in this embodiment, the depth of the ejector block groove 301 is much greater than the ejection stroke, and the ejector block 9 does not leave the ejector block groove 301 during the ejection process, so that the problem of inaccurate return is avoided.

Furthermore, a pressing plate 10 is fixed on the bottom plate 1 through screws, the pressing plate 10 covers the bottom of the stroke limiting cavity 101, and the lower end face of the sliding block 6 is supported on the pressing plate 10. The middle part of the lower end of the sliding block 6 is provided with an accommodating groove 602, the spring 7 is arranged in the accommodating groove 602, one end of the spring 7 elastically abuts against the top wall of the accommodating groove 602, and the other end of the spring 7 elastically abuts against the pressing plate 10.

A guide post 11 is further arranged between the bottom plate 1 and the rear die 2, and the ejector pin plate group 4 is in sliding fit with the guide post 11 through a guide sleeve 12 so as to increase the movement stability of the ejector pin plate group 4.

The ejection process of this embodiment is as follows:

referring to fig. 4, after the product is injection molded in the mold, the front mold 8 moves upward relative to the rear mold 2 to open, the ejector pin plate group 4 moves upward away from the sliding block 6 under the pushing of the injection molding machine, meanwhile, the sliding block 6 moves upward under the elastic force of the spring 7 until the annular boss 601 stops upward at the bottom of the limit stop table 102, and the sliding block 6 drives the ejector block 9 to move upward synchronously through the ejector pins 5 to eject the product.

In the previous description, numerous specific details were set forth in order to provide a thorough understanding of the invention. The foregoing description is only illustrative of the preferred embodiments of the invention, which can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. All the contents that do not depart from the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention all still belong to the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides an ejecting small stroke ejecting mould structure of kicking block float, includes bottom plate (1), fixes back mould (2) and setting above bottom plate (1) are in bottom plate (1) with ejection mechanism between back mould (2), be provided with back mold core (3) on back mould (2), its characterized in that: the ejection mechanism comprises an ejector pin plate group (4), ejector pins (5), a sliding block (6) and a spring (7), a stroke limiting cavity (101) is arranged in the bottom plate (1), the lower end of the sliding block (6) is movably arranged in the stroke limiting cavity (101), and the spring (7) is arranged at the bottom of the sliding block (6) and has upward elasticity on the sliding block (6); the ejector pin plate group (4) is movably arranged between the bottom plate (1) and the rear mold (2) and is attached to the upper end face of the sliding block (6) in a pressing mode, the lower end of the ejector pin (5) penetrates through the ejector pin plate group (4) and is fixedly connected with the sliding block (6), and the upper end of the ejector pin (5) penetrates through the rear mold (2) and is inserted into the rear mold core (3).

2. The ejector block floating small-stroke ejection die structure according to claim 1, wherein: the lower end of the sliding block (6) is provided with an annular boss (601) around the periphery, the stroke limiting cavity (101) extends inwards along the inner wall to form a limiting blocking table (102), and the limiting blocking tables (102) are distributed over the annular boss (601) at intervals; when the ejector pin plate group (4) moves upwards to leave the sliding block (6), the sliding block (6) moves upwards under the action of the elastic force of the spring (7) until the annular boss (601) stops upwards at the bottom of the limit stop table (102).

3. The ejector block floating small-stroke ejection die structure according to claim 1, wherein: the mould also comprises a front mould (8) which is arranged above the rear mould (2) and can perform mould opening and closing actions relative to the rear mould (2), and a cavity for forming a product is formed between the rear mould core (3) and the front mould (8).

4. The ejector block floating small-stroke ejection die structure as claimed in claim 3, wherein: the rear mold core (3) is provided with a top block groove (301), a top block (9) capable of sliding up and down is installed in the top block groove (301), at least part of the top block (9) is located in the mold cavity, and the top block (9) is fixedly connected with the upper end of the ejector pin (5).

5. The ejector block floating small-stroke ejection die structure according to claim 1, wherein: the ejector pin plate group (4) comprises an upper ejector pin plate (401) and a lower ejector pin plate (402), the lower ejector pin plate (402) is provided with a first through hole, and the upper end of the sliding block (6) extends into the first through hole; the upper ejector plate (401) is provided with a second through hole which is coaxial with and communicated with the first through hole, and the diameter of the second through hole is smaller than that of the first through hole, so that a step (403) for pressing and attaching the upper end surface of the sliding block (6) is formed.

6. The ejector block floating small-stroke ejection die structure as claimed in claim 1, wherein: a pressing plate (10) is fixed on the bottom plate (1), the pressing plate (10) covers the bottom of the stroke limiting cavity (101), and the lower end face of the sliding block (6) is supported on the pressing plate (10).

7. The ejector block floating small-stroke ejection die structure as claimed in claim 6, wherein: an accommodating groove (602) is formed in the middle of the lower end of the sliding block (6), the spring (7) is arranged in the accommodating groove (602), one end of the spring (7) is elastically abutted to the top wall of the accommodating groove (602), and the other end of the spring is elastically abutted to the pressing plate (10).

8. The ejector block floating small-stroke ejection die structure according to claim 1, wherein: a guide post (11) is further arranged between the bottom plate (1) and the rear die (2), and the ejector pin plate group (4) is in sliding fit with the guide post (11) through a guide sleeve (12).