CN215969849U

CN215969849U - Side core-pulling ejection demolding mold

Info

Publication number: CN215969849U
Application number: CN202122156908.XU
Authority: CN
Inventors: 周志鹏; 黄良浩; 王成相; 黄伟扬; 张学志
Original assignee: Dongguan 3t Mold Co ltd
Current assignee: Dongguan 3t Mold Co ltd
Priority date: 2021-09-08
Filing date: 2021-09-08
Publication date: 2022-03-08
Anticipated expiration: 2031-09-08

Abstract

The utility model relates to a side core-pulling ejection demoulding mould which comprises a side core-pulling mechanism and an ejection mechanism, wherein the side core-pulling mechanism consists of a top block, a front top block insert, a rear top block insert, a top block insert pin, a slide seat, a seat cover plate, a first core-pulling guide block and a second core-pulling guide block; during demolding, the side core-pulling mechanism is jacked up by the ejection mechanism, the side core-pulling mechanism is started to realize core pulling after the side core-pulling mechanism is jacked to a certain height, and demolding of the injection molding product is finally completed. The side core-pulling mechanism and the ejection mechanism are simple in structure and high in reliability, an injection product with a hollow screw rod part is formed transversely, and an ejector pin ejection scheme is not adopted, so that ejector pin marks in the radial direction of the injection product are avoided, the internal thread tooth rotating mechanism is changed from the original vertical placement occupying large size of the mold thickness to the transverse placement, an injection molding machine table is correspondingly reduced, and product demolding can be realized.

Description

Side core-pulling ejection demolding mold

Technical Field

The utility model relates to the technical field of injection molds, in particular to a side core-pulling ejection demolding mold.

Background

At present, in the injection mold on the market, when the injection product has more structures and has internal threads, if the conventional thimble is used to eject the vertically placed injection product, the structure of the corresponding injection mold is complex, and an injection molding machine table needs to be increased, so that the manufacturing cost and the injection molding cost of the injection mold are increased.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a side core-pulling ejection demoulding mould aiming at the defects of the prior art.

In a first aspect, an embodiment of the present invention provides a side core-pulling ejection demolding mold for injection molding of an injection molding product with a transverse hollow screw rod portion, including a ejector rod plate, a straight ejector rod, a rear mold plate and a front mold plate, wherein the rear mold plate is provided with an ejector block, an ejector block insert pin, a slide insert pin, a rear mold core, a slide seat, a first core-pulling guide block and a second core-pulling guide block, the front mold plate is provided with a shovel base and a front mold core, the first core-pulling guide block is fixed on the ejector block along a core-pulling direction, the slide seat is slidably assembled on the first core-pulling guide block, the ejector block insert pin is fixed on the ejector block insert pin, the slide insert pin is fixed on the slide seat and inserted into the ejector block insert pin, an end surface of the ejector block insert pin is used as a first portion of a molding cavity, and an outer surface of the ejector block insert pin exposed outside the ejector block insert pin is used as a second portion of the molding cavity and the front mold core, The back mould benevolence constitutes complete shaping die cavity, the second guide block configuration of loosing core has the guide way of horizontal line position and the capable position of lift, the line position seat disposes the guide block, ejector pin board is through the lift of the straight ejector pin control kicking block of drive, the kicking block drives the lift of line position seat when going up and down, the line position seat orders about line position seat through the guide block at the direction of guide way when going up and down and slides along the direction of loosing core of first guide block of loosing core, the shovel base drives line position seat through the inclined plane when the compound die of front template descends and slides along first guide block of loosing core.

In some embodiments, the rear template is provided with a guide sleeve, the guide sleeve is fixed on the rear template through a guide sleeve pressing plate, and the straight ejector rod penetrates through the guide sleeve.

In some of these embodiments, the rear mold plate is fitted with a rear mold telescoping insert that is inserted into the rear mold core, and the rear mold telescoping insert has a third portion of the molding cavity that makes up the rear mold core.

In some embodiments, the guide groove includes a guide inclined hole with a high position far away from the rear mold core and a low position close to the rear mold core, an upper guide hole located at the high position of the guide inclined hole, and a lower guide hole located at the low position of the guide inclined hole, wherein the upper guide hole is a vertical guide hole, and the lower guide hole is a vertical guide hole or another inclined guide hole.

In some embodiments, the top block drives the slide seat to lift a certain virtual position under the guiding action of the lower guide hole on the guide block during lifting, so that the slide insert pin drives the injection molding product to lift to vertically separate from the rear mold core before core pulling.

In some embodiments, the first core-pulling guide block has a T-shaped slide block in cross section, and the slide seat is provided with a T-shaped sliding groove matched with the T-shaped slide block.

In some embodiments, the inner end part of the line insert pin is fixedly assembled on the line seat through the line seat cover plate in a limiting way.

In some of these embodiments, the front mold plate is fixedly fitted with a guide plate vertically and relatively slidably fitted on the rear mold plate.

Compared with the prior art, the side core-pulling ejection demolding mold provided by the embodiment of the utility model is characterized in that a side core-pulling mechanism is provided in the mold and the ejection mechanism is configured below the side core-pulling mechanism, the side core-pulling mechanism consists of an ejector block, a front ejector block insert, a rear ejector block insert, an ejector block insert pin, a slide seat, a seat cover plate, a first core-pulling guide block and a second core-pulling guide block, and the ejection mechanism consists of a straight ejector rod, a face ejector rod plate and a bottom ejector rod plate. The side core-pulling mechanism and the ejection mechanism are simple in structure and high in reliability, an injection product with a hollow screw rod part is formed transversely, and an ejector pin ejection scheme is not adopted, so that ejector pin marks in the radial direction of the injection product are avoided, the internal thread tooth rotating mechanism is changed from the original vertical placement occupying large size of the mold thickness to the transverse placement, an injection molding machine table is correspondingly reduced, and product demolding can be realized.

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 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 not to limit the utility model. In the drawings:

FIG. 1 is a structural view of an injection-molded product of an embodiment of the present invention.

Fig. 2 is an overall structural view of the side core pulling ejection demolding mold according to the embodiment of the utility model.

Fig. 3 is a partial structural view of the side core back ejector demolding die according to the embodiment of the present invention.

Fig. 4 is another partial structural view of the side core back ejection demolding mold according to the embodiment of the utility model.

Fig. 5 is a sectional structure view of the side core pulling ejection demolding mold according to the embodiment of the utility model.

Fig. 6 is an enlarged structural view of a portion a in fig. 5.

Fig. 7 is a structural view of a second core back guide block according to an embodiment of the present invention.

In the drawings, 1, an injection molded product; 2. a cover body; 3. a hollow stem portion; 4. an external thread; 5. a panel; 6. a front template; 7. a rear template; 8. a support plate; 9. a face ejector plate; 10. a bottom ejector plate; 11. a base plate; 12. square iron; 13. a straight ejector rod; 14. a guide sleeve; 15. pressing blocks of the guide sleeves; 16. a top block; 17. a front ejector block insert; 18. a rear ejector block insert; 19. inserting a pin into the top block; 20. inserting a pin in a line; 21. a rear mold core; 22. a slide seat; 23. a seat cover plate; 24. a first core-pulling guide block; 25. a second core-pulling guide block; 26. a shovel base; 27. a front mold core; 28. an end face; 29. an outer surface; 30. a first stopper; 31. a first limit groove; 32. a second limiting block; 33. a second limit groove; 34. a guide groove; 35. a guide block; 36. a guide inclined hole; 37. an upper guide hole; 38. a lower guide hole; 39. a rear mould telescopic insert; 40. a guide plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments provided by the present invention, belong to the protection scope of the present invention. Moreover, it should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the utility model. The appearances of the phrase 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 explicitly and implicitly understood by one of ordinary skill in the art that the described embodiments of the present invention can be combined with other embodiments without conflict.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of the terms "a" and "an" and "the" and similar referents in the context of describing the utility model are not to be construed as limiting in number, and may be construed to cover both the singular and the plural. The present invention relates to the terms "comprises," "comprising," "includes," "including," "has," "having" and any variations thereof, which are intended to cover non-exclusive inclusions; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to the listed 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 the description of the utility model are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The term "plurality" as used herein means two or more. "and/or" describes an association relationship of associated objects, meaning that three relationships may exist, for example, "A and/or B" may mean: a exists alone, A and B exist simultaneously, and B exists alone. The terms "first," "second," "third," and the like in reference to the present invention are used merely to distinguish between similar objects and not necessarily to represent a particular ordering for the objects.

As shown in fig. 1, the injection molded product of the present invention is a cap body as a whole, a hollow rod portion penetrating through both inner and outer ends and opening is formed in the cap body, an external thread is arranged on the outer periphery of the hollow rod portion, the cap body and the hollow rod portion are molded by the molding cavity of the present invention, and the external thread of the hollow rod portion is molded by a thread turning mechanism (not shown).

As shown in fig. 1-7, a side core-pulling ejection demolding mold according to an embodiment of the present invention is used for injection molding of an injection molding product 1 having a transverse hollow screw part, the injection molding product 1 is formed by transverse injection molding, the mold sequentially includes, from top to bottom, a face plate 5, a front mold plate 6, a rear mold plate 7, a support plate 8, a face ejector plate 9, a bottom ejector plate 10, and a bottom plate 11, a square iron 12 is assembled and fixed on the bottom plate 11, the support plate 8 is assembled and fixed on the square iron 12, bottoms of two straight ejector rods 13 are assembled and fixed on the bottom ejector plate 10 through the face ejector plate 9, tops of the straight ejector rods 13 are assembled and fixed on a top block 16, a guide sleeve 14 is assembled and fixed on the rear mold plate 7 through a guide sleeve press block 15, the straight ejector rods 13 penetrate through the support plate 8 and the rear mold plate 7 from bottom to top and penetrate through the guide sleeve 14, the face ejector plate 9 and the bottom ejector plate 10 are driven by a power device to control lifting of the straight ejector rods 13, the lifting of the straight ejector rod 13 drives the lifting of the ejector block 16. The tooth rotating mechanism is arranged at the side of the mold and is matched and linked with the mold, the tooth rotating mechanism comprises an internal thread insert and a motor, and the motor controls the internal thread insert to be screwed out of the mold along threads during demolding.

In this embodiment, the rear mold plate 7 is provided with a top block 16, a front top block insert 17, a rear top block insert 18, a top block insert pin 19, a slide insert pin 20, a rear mold core 21, a slide seat 22, a seat cover plate 23, a first core-pulling guide block 24 and a second core-pulling guide block 25, and the front mold plate 6 is provided with a shovel base 26 and a front mold core 27; the side core-pulling mechanism is simple in structure, and the thickness of the mold is reduced through the side core-pulling mechanism, so that the size of an injection molding machine table is reduced.

In this embodiment, the first core-pulling guide block 24 is fixed on the ejector block 16 along the core-pulling direction, the slide seat 22 is slidably assembled on the first core-pulling guide block 24, the front ejector block insert 17 and the rear ejector block insert 18 are fixedly assembled on the ejector block 16, the ejector block insert pin 19 is assembled and fixed on the front ejector block insert 17 through the rear ejector block insert 18, the inner end of the ejector block insert pin 19 is fixedly assembled on the front ejector block insert 17 through the front ejector block insert 17, the outer end of the ejector block insert pin 19 is inserted into a combined hole between the front mold core 27 and the rear mold core 21, and the end surface 28 of the front ejector block insert pin 19 serves as a first part of a molding cavity, and the first part of the molding cavity is used for molding the inner end surface 28 of the injection-molded product 1. The inner end part of the line position insert pin 20 is fixedly assembled on the line position seat 22 in a limiting way through a cover plate of the line position seat 22, so that the side core pulling is realized along with the movement of the line position seat 22, and the assembly structure of the top block insert pin 19 and the line position insert pin 20 is simple and has strong reliability. The bottom surface of the front ejector block insert pin 19 is provided with a first limiting block 30 perpendicular to the core pulling direction, and the ejector block 16 is provided with a first limiting groove 31 perpendicular to the core pulling direction.

In this embodiment, the slide insert pin 20 is fixedly mounted on the slide seat 22 and inserted into the needle hole of the top block insert pin 19, and the outer surface 29 of the slide insert pin 20 exposed outside the top block insert pin 19 serves as a second portion of the molding cavity for molding the hollow rod portion 3 of the injection-molded product 1. Since the ejector block insert pin 19 is fixedly assembled, the pin hole of the ejector block insert pin 19 serves as a guide for the slide insert pin 20 to move in the core-pulling direction.

In summary, the first portion of the molding cavity, the second portion of the molding cavity, the front core 27 and the rear core 21 (and the internal thread molding insert of the tooth rotating mechanism) form a complete molding cavity, and the front core 27 and the rear core 21 (and the internal thread molding insert of the tooth rotating mechanism) mold the cover 2 portion of the injection molded product 1.

In this embodiment, the cross section of the first core pulling guide block 24 is a T-shaped slider, and the slide seat 22 is configured with a T-shaped sliding slot matched with the T-shaped slider. The bottom surface of the first core pulling guide block 24 is provided with a second limiting block 32 along the core pulling direction, the ejector block 16 is provided with a second limiting groove 33 along the core pulling direction, and the first core pulling guide block 24 is embedded in the second limiting groove 33 through the second limiting block 32 to limit the position of the first core pulling guide block 24 on the ejector block 16. The first loose core guide block 24 has a simple structure, provides stable and reliable slide moving support, and improves the reliability of the operation of the mold.

In this embodiment, the second core back guide block 25 is provided with a guide groove 34 having a horizontal row position and an ascending and descending row position, the row seat 22 is provided with a guide block 35, the ascending and descending of the ejector block 16 is controlled by driving the straight ejector rod 13, the ejector block 16 drives the ascending and descending of the row seat 22 during the ascending and descending, and the row seat 22 drives the row seat 22 to slide along the core back direction of the first core back guide block 24 by the guiding movement of the guide block 35 in the guide groove 34 during the ascending and descending. The guide groove 34 includes a guide inclined hole 36 with a high position far away from the rear mold core 21 and a low position close to the rear mold core 21, an upper guide hole 37 located at the high position of the guide inclined hole 36, and a lower guide hole 38 located at the low position of the guide inclined hole 36, where the upper guide hole 37 is a guide vertical hole, and according to a molding structure of the injection molded product 1, the lower guide hole 38 is configured as a guide vertical hole or another guide inclined hole 36, and when the injection molded product 1 does not need a trip position, the lower guide hole 38 is configured as a guide vertical hole, that is, when the mold is removed, the injection molded product 1 is vertically lifted along the guide vertical hole, and when the injection molded product 1 needs a trip position, the lower guide hole 38 is configured as another guide inclined hole 36, that is, when the mold is removed, the injection molded product 1 is lifted along an inclined direction. The second core back guide blocks 25 are disposed on both the left and right sides of the top block 16, the guide grooves 34 face the top block 16, and the guide blocks 35 disposed on the row seat 22 of the top block 16 are screwed into screw holes on both the left and right sides of the row seat 22. In the embodiment, the straight ejector rod 13 controls the side core pulling mechanism through the matching of the guide groove 34 and the guide block 35, and the composition structure is simple and reliable compared with the conventional ejector pin.

In this embodiment, the top block 16 drives the slide seat 22 to lift a certain virtual position by the guiding action of the lower guiding hole 38 on the guiding block 35 during lifting, so that the slide insert pin 20 drives the injection product 1 to lift to vertically separate from the rear mold core 21 without performing side core pulling before core pulling, and at this time, the top block insert pin 19 together with the injection product 1 separates from the rear mold core 21. After the top block 16 is further lifted, when the guide block 35 leaves the lower guide hole 38 and enters the inclined guide hole 36, the slide seat 22 is guided to start lateral side core pulling, and the slide insert 20 starts to be pulled away from the hollow rod part 3. When the ejector block 16 is further lifted, the guide block 35 leaves the inclined guide hole 36 and enters the upper guide hole 37, the slide seat 22 is vertically lifted without any further lateral side core pulling, and at this time, the side core pulling is completed, and the slide insert 20 is completely pulled out of the hollow rod part 3 and is retracted into the needle hole of the ejector block insert 19.

In this embodiment, when the mold closing of the front mold plate 6 is lowered, the shovel base 26 directly drives or assists to drive the slide seat 22 to slide along the first core pulling guide block 24 through the inclined surface, so as to enhance the relevance between the shovel base 26 and the front mold plate 6 and the slide seat 22 in the mold, and make the mold structure more stable and reliable.

In this embodiment, the rear mold plate 7 is equipped with a rear mold telescopic insert 39, the rear mold telescopic insert 39 is inserted into the rear mold core 21, and the rear mold telescopic insert 39 has a third portion constituting a molding cavity of the rear mold core 21. The third part of the molding cavity is used to mold side hole sites in the injection molded product 1.

In the embodiment, the front mold plate 6 is fixedly assembled with the guide plate 40, the guide plate 40 is vertically assembled on the rear mold plate 7 in a relatively sliding manner, the guide plate 40 provides a guiding function for the opening and closing of the front mold plate 6 and the rear mold plate 7, and the reliability of the mold operation is improved.

The working principle is as follows: the demoulding mould provided by the embodiment of the utility model is provided with a side core-pulling mechanism in the mould and an ejection mechanism arranged below the side core-pulling mechanism, the side core-pulling mechanism consists of a top block 16, a front top block insert 17, a rear top block insert 18, a top block insert pin 19, a slide insert pin 20, a slide seat 22, a seat cover plate 23, a first core-pulling guide block 24 and a second core-pulling guide block 25, the ejection mechanism consists of a straight ejector rod 13, a face ejector rod plate 9 and a bottom ejector rod plate 10, the composition structure of the side core-pulling mechanism and the ejection mechanism is simple and has strong reliability, and by transversely forming the injection molding product 1 with a hollow screw rod part, and the ejector pin ejection scheme is not adopted, so that the ejector pin print generated in the radial direction of the injection product 1 is avoided, and (3) jacking the side core-pulling mechanism by using the ejection mechanism, starting the side core-pulling mechanism after the side core-pulling mechanism is jacked to a certain height to realize core pulling, and finally completing the demoulding of the injection product 1.

It should be understood by those skilled in the art that various features of the above-described embodiments can be combined in any combination, and for the sake of brevity, all possible combinations of features in the above-described embodiments are not described in detail, but rather, all combinations of features which are not inconsistent with each other should be construed as being within the scope of the present disclosure.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The side core-pulling ejection demolding mold is characterized by being used for injection molding of an injection molding product (1) with a transverse hollow screw rod part and comprising a ejector rod plate, a straight ejector rod (13), a rear mold plate (7) and a front mold plate (6), wherein an ejector block (16), an ejector block insert pin (19), a row position insert pin (20), a rear mold core (21), a row position seat (22), a first core-pulling guide block (24) and a second core-pulling guide block (25) are assembled on the rear mold plate (7), a shovel base (26) and a front mold core (27) are assembled on the front mold plate (6), the first core-pulling guide block (24) is fixed on the ejector block (16) along the core-pulling direction, the row position seat (22) is assembled on the first core-pulling guide block (24) in a sliding manner, the ejector block insert pin is fixed on the ejector block insert pin (19), the row position insert needle (20) is fixed on the row position seat (22) and penetrates into the ejector block insert needle (19), the end face (28) of the ejector block insert needle (19) serves as a first part of a forming die cavity, the outer surface (29) of the row position insert needle (20) exposed out of the ejector block insert needle (19) serves as a second part of the forming die cavity, the front die core (27) and the rear die core (21) form a complete forming die cavity, the second core-pulling guide block (25) is provided with a guide groove (34) with a horizontal row position and a lifting row position, the row position seat (22) is provided with a guide block (35), the ejector rod plate controls the lifting of the ejector block (16) through driving a straight ejector rod (13), the ejector block (16) drives the row position seat (22) to lift when lifting, and the row position seat (22) drives the row position seat (22) to move along the first guide of the core-pulling seat (22) through the guide block (35) when lifting The core pulling direction of the block (24) slides, and the shovel base (26) drives the slide seat (22) to slide along the first core pulling guide block (24) through an inclined plane when the mold closing of the front mold plate (6) descends.

2. The side core pulling ejection demolding die as claimed in claim 1, wherein the rear mold plate (7) is provided with a guide sleeve (14), the guide sleeve (14) is fixed on the rear mold plate (7) through a guide sleeve pressing plate (15), and the straight ejector rod (13) penetrates through the guide sleeve (14).

3. The side-core knockout mold according to claim 1, wherein the rear mold plate (7) is equipped with a rear mold telescopic insert (39), the rear mold telescopic insert (39) is inserted into the rear mold core (21), and the rear mold telescopic insert (39) has a third portion constituting a molding cavity of the rear mold core (21).

4. The side core pulling and ejecting mold release device according to claim 1, wherein the guide grooves (34) comprise a guide inclined hole (36) with a high position far away from the rear mold core (21) and a low position close to the rear mold core (21), an upper guide hole (37) located at the high position of the guide inclined hole (36), and a lower guide hole (38) located at the low position of the guide inclined hole (36), the upper guide hole (37) is a guide vertical hole, and the lower guide hole (38) is a guide vertical hole or another guide inclined hole.

5. The side core pulling and ejecting demolding die as claimed in claim 4, wherein the ejector block (16) drives the slide seat (22) to lift a certain virtual position through the guiding effect of the lower guide hole (38) on the guide block (35) during lifting, so that the slide insert pin (20) drives the injection product (1) to lift to vertically separate from the rear mold core (21) before core pulling.

6. The side core pulling ejection demolding die as claimed in claim 1, wherein the cross section of the first core pulling guide block (24) is a T-shaped sliding block, and the slide seat (22) is provided with a T-shaped sliding groove matched with the T-shaped sliding block.

7. The side core pulling ejection demolding die as claimed in claim 1, wherein the inner end portion of the row position insert pin (20) is fixedly assembled on the row position seat (22) in a limiting mode through a cover plate of the row position seat (22).

8. A side core ejection stripper die according to claim 1, wherein the front die plate (6) is fixedly fitted with a guide plate (40), the guide plate (40) being vertically and relatively slidably fitted on the rear die plate (7).