CN212579139U

CN212579139U - Ejection mechanism for plastic injection mold

Info

Publication number: CN212579139U
Application number: CN202021072692.8U
Authority: CN
Inventors: 杨日熙
Original assignee: Dongguan Jingsheng Precision Plastic Mould Technology Co ltd
Current assignee: Dongguan Jingsheng Precision Plastic Mould Technology Co ltd
Priority date: 2020-06-11
Filing date: 2020-06-11
Publication date: 2021-02-23
Anticipated expiration: 2030-06-11

Abstract

The utility model discloses a plastics are ejection mechanism for injection mold, including bottom plate, limiting plate, backup pad, connecting plate, fixed plate and roof, the top of bottom plate is fixed with the limiting plate, and the top of limiting plate is connected with the backup pad, and one side that the limiting plate was kept away from to the backup pad is fixed with the connecting plate, and the top of connecting plate is fixed with the fixed plate, and the top of fixed plate is connected with the roof, still includes: the ejector mechanism for the plastic injection mold comprises an upper mold plate, a lower mold plate, an injection gate and an ejector mechanism body, wherein the injection gate is arranged at the center of the top of a top plate, fixing grooves are formed in the bottom of the top plate and the top of a fixing plate, the upper mold plate and the lower mold plate are respectively and fixedly arranged in the fixing grooves in the bottom of the top plate and the top of the fixing plate, a mold stripping plate is arranged in the upper mold plate and the lower mold plate, the ejector mechanism body is arranged in the mold stripping plate, the ejector mechanism for the plastic injection mold can realize better demolding, scratches and scratches on the surface of a product.

Description

Ejection mechanism for plastic injection mold

Technical Field

The utility model relates to a plastics injection mold technical field specifically is a plastics ejection mechanism for injection mold.

Background

The injection mold is widely applied to the plastic industry, mainly comprises a pouring system, a guide system, a forming system, a cooling system, an ejection mechanism and the like, and for products which are complex in shape, have side holes and side recesses and cannot be directly ejected, the products need to be ejected through a core-pulling structure or an inclined ejection mechanism.

The existing ejection mechanism for the injection mold generally ejects a product through an ejector pin inside the ejection mechanism when an upper mold plate is disconnected with a lower mold plate, and the surface of the product is easily scratched and scratched by the ejector pin in the ejection process of the product, so that the quality of the product is affected.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a plastics ejection mechanism for injection mold to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a plastics ejection mechanism for injection mold, includes bottom plate, limiting plate, backup pad, connecting plate, fixed plate and roof, the top of bottom plate is fixed with the limiting plate, and the top of limiting plate is connected with the backup pad, one side that the limiting plate was kept away from to the backup pad is fixed with the connecting plate, and the top of connecting plate is fixed with the fixed plate, the top of fixed plate is connected with the roof, still includes: the ejection mechanism comprises an upper template, a lower template, an injection gate and an ejection mechanism body, wherein the injection gate is arranged at the center of the top plate, fixing grooves are formed in the bottom of the top plate and the top of the fixing plate, the upper template and the lower template are respectively and fixedly arranged in the fixing grooves in the bottom of the top plate and the top of the fixing plate, stripping plates are arranged in the upper template and the lower template, and the ejection mechanism body is arranged in the stripping plates.

Preferably, the ejection mechanism body includes first thimble, ejector pin, bracing piece and second thimble, the inside spout and the spout sliding connection who all sets up vertical direction of limiting plate and backup pad have first thimble, and the tip of first thimble passes connecting plate and fixed plate, the shifting chute has been seted up to the tip that lies in first thimble in the lower bolster, and sliding connection has the ejector pin in the shifting chute, the tip of first thimble and the bottom fixed connection of ejector pin, first thimble top outside cover is equipped with the tight spring in top, the one end of stripper plate bottom is provided with the connecting cylinder, the tip joint of ejector pin is in the connecting cylinder.

Preferably, the lifting groove of vertical direction is seted up to the one end that the spout was kept away from to the limiting plate in and the backup pad, and lifting inslot sliding connection has the second thimble, the tip of second thimble passes connecting plate and fixed plate, the inside adjustment tank of having seted up of lower bolster, and sliding connection has the bracing piece in the adjustment tank, the tip and the bracing piece fixed connection of second thimble, the outside cover on second thimble top is equipped with expanding spring, the bottom of stripper plate is provided with the back-off, the tip joint of bracing piece is in the back-off.

Preferably, the top end of the ejector rod is provided with a tooth groove, the lower end of the inner wall of the connecting cylinder is provided with a conical tooth, and the conical tooth is clamped in the tooth groove.

Preferably, the diameter that first thimble is located the inside one end of spout is greater than the diameter that first thimble is located the outside one end of spout, the diameter that the ejector pin is located the inside one end of shifting chute is greater than the diameter that the ejector pin is located the outside one end of shifting chute, the diameter that the second thimble is located the inside one end of lifting chute is greater than the diameter that the second thimble is located the outside one end of lifting chute, the diameter that the bracing piece is located the inside one end of adjustment tank is greater than the diameter that the bracing piece is located the outside one end of adjustment tank.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a set up the stripper plate in the die cavity, and set up connecting cylinder and back-off in the stripper plate bottom, when the drawing of patterns, roof and fixed plate break away from the connection back, the second thimble also with first thimble worker with the effect with lower bolster jack-up, the elasticity of the tight spring in top on the first thimble is greater than the elasticity of expanding spring on the second thimble, when the stripper plate is ejecting 20mm, the back-off has deviate from by force, the top and the back-off of bracing piece break away from the connection promptly, when the stripper plate is ejecting 40mm, the tip of ejector pin also breaks away from the connection with the connecting cylinder, the stripper plate at this moment is whole ejecting, realize better drawing of patterns, can not cause the scratch and the scratch on product surface, the quality of product has been guaranteed.

Drawings

FIG. 1 is a schematic view of the structure of the film-closing state of the present invention;

FIG. 2 is a schematic view of the structure of the present invention in which the top plate is separated from the fixing plate;

FIG. 3 is a schematic structural view of the lower template of the present invention after being ejected by 20 mm;

FIG. 4 is a schematic structural view of the lower template of the present invention after being ejected by 40 mm;

FIG. 5 is a schematic diagram of an enlarged view of the position A of the present invention;

fig. 6 is a schematic diagram of the enlarged view at the position B of the present invention.

In the figure: 1. a base plate; 2. a limiting plate; 3. a support plate; 4. a connecting plate; 5. a fixing plate; 6. a top plate; 7. mounting a template; 8. a lower template; 9. pouring a gate; 10. ejecting the mechanism body; 11. a stripper plate; 12. a chute; 13. a first thimble; 14. the spring is tightly propped; 15. a top rod; 16. a connecting cylinder; 17. a tooth socket; 18. reversing; 19. a support bar; 20. a lifting groove; 21. a second thimble; 22. a tension spring; 23. a moving groove; 24. and (4) adjusting the groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: the utility model provides a plastics ejection mechanism for injection mold, includes bottom plate 1, limiting plate 2, backup pad 3, connecting plate 4, fixed plate 5 and roof 6, the top of bottom plate 1 is fixed with limiting plate 2, and the top of limiting plate 2 is connected with backup pad 3, one side that limiting plate 2 was kept away from to backup pad 3 is fixed with connecting plate 4, and the top of connecting plate 4 is fixed with fixed plate 5, the top of fixed plate 5 is connected with roof 6, still includes: the injection molding device comprises an upper template 7, a lower template 8, an injection gate 9 and an ejection mechanism body 10, wherein the injection gate 9 is arranged at the center of the top of a top plate 6, fixing grooves are formed in the bottom of the top plate 6 and the top of a fixing plate 5, the upper template 7 and the lower template 8 are fixedly arranged in the fixing grooves in the bottom of the top plate 6 and the top of the fixing plate 5 respectively, a stripping plate 11 is arranged in the upper template 7 and the lower template 8, the ejection mechanism body 10 is arranged in the stripping plate 11, materials can be conveniently injected during injection molding through the injection gate 9, and the ejection mechanism body 10 is convenient to eject a molded mold product through the stripping plate 11.

Referring to fig. 1-4, the ejecting mechanism 10 includes a first thimble 13, a push rod 15, a support rod 19 and a second thimble 21, a vertical sliding groove 12 is formed in each of the limiting plate 2 and the support plate 3, the sliding groove 12 is connected with the first thimble 13 in a sliding manner, an end of the first thimble 13 penetrates through the connecting plate 4 and the fixing plate 5, a moving groove 23 is formed in an end of the first thimble 13 in the lower mold plate 8, the push rod 15 is connected in the moving groove 23 in a sliding manner, an end of the first thimble 13 is fixedly connected with a bottom of the push rod 15, a jacking spring 14 is sleeved outside a top end of the first thimble 13, a connecting cylinder 16 is arranged at one end of a bottom of the stripper plate 11, an end of the push rod 15 is clamped in the connecting cylinder 16, after the mold is formed, a parting surface is opened, the top plate 6 is separated from the connection with the fixing plate 5, at this time, the first thimble 13 jacks, the demoulding of the mould is facilitated.

Referring to fig. 1, 2, 3, 4 and 6, a vertical lifting groove 20 is formed in the limiting plate 2 and at one end of the supporting plate 3 away from the sliding groove 12, a second thimble 21 is slidably connected in the lifting groove 20, an end of the second thimble 21 passes through the connecting plate 4 and the fixing plate 5, an adjusting groove 24 is formed in the lower mold plate 8, a supporting rod 19 is slidably connected in the adjusting groove 24, an end of the second thimble 21 is fixedly connected with the supporting rod 19, a telescopic spring 22 is sleeved outside a top end of the second thimble 21, an inverted buckle 18 is arranged at the bottom of the mold stripping plate 11, an end of the supporting rod 19 is clamped in the inverted buckle 18, after the top plate 6 is disconnected from the fixing plate 5, the second thimble 21 and the first thimble 13 work together to jack up the lower mold plate 8, and an elastic force of the jacking spring 14 on the first thimble 13 is greater than an elastic force of the telescopic spring 22 on the second thimble 21, when the demoulding plate 11 is ejected by 20mm, the reverse buckle 18 is forcedly disengaged, namely the top end of the supporting rod 19 is disconnected with the reverse buckle 18, when the demoulding plate 11 is ejected by 45mm, the end part of the ejector rod 15 is also disconnected with the connecting cylinder 16, and the demoulding plate 11 is ejected completely at the moment, so that better demoulding is realized, and the quality of products is ensured.

Referring to fig. 5, a tooth groove 17 is formed at the top end of the ejector rod 15, and a tapered tooth is arranged at the lower end of the inner wall of the connecting cylinder 16 and is clamped in the tooth groove 17.

Referring to fig. 1-4, a diameter of the first thimble 13 at an end inside the sliding slot 12 is larger than a diameter of the first thimble 13 at an end outside the sliding slot 12, a diameter of the ejector pin 15 at an end inside the moving slot 23 is larger than a diameter of the ejector pin 15 at an end outside the moving slot 23, a diameter of the second thimble 21 at an end inside the lifting slot 20 is larger than a diameter of the second thimble 21 at an end outside the lifting slot 20, and a diameter of the support rod 19 at an end inside the adjusting slot 24 is larger than a diameter of the support rod 19 at an end outside the adjusting slot 24.

The working principle is as follows: when the mold is in a film-closing state, materials are injected into the mold cavity through the injection gate 9, after the molding, firstly, the top plate 6 is disconnected with the fixed plate 5, after the top plate 6 is disconnected with the fixed plate 5, the first thimble 13 and the second thimble 21 slide upwards, the stripper plate 11 is jacked up under the action of the ejector rod 15 and the support rod 19 when the first thimble 13 and the second thimble 21 slide upwards, the elastic force of the jacking spring 14 is larger than that of the telescopic spring 22, at the moment, the jacking height of the ejector rod 15 is larger than that of the support rod 19, when the stripper plate 11 is jacked out for 20mm, the back-off 18 is forced to be disengaged, i.e., the top end of the support bar 19 is disconnected from the undercut 18, when the stripper plate 11 is ejected 45mm, the end part of the ejector rod 15 is also disconnected with the connecting cylinder 16, and the stripper plate 11 is ejected completely at the moment, so that better stripping is realized, and the quality of products is ensured.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a plastics ejection mechanism for injection mold, includes bottom plate (1), limiting plate (2), backup pad (3), connecting plate (4), fixed plate (5) and roof (6), the top of bottom plate (1) is fixed with limiting plate (2), and the top of limiting plate (2) is connected with backup pad (3), one side that limiting plate (2) were kept away from in backup pad (3) is fixed with connecting plate (4), and the top of connecting plate (4) is fixed with fixed plate (5), the top of fixed plate (5) is connected with roof (6), and its characterized in that still includes: the ejection mechanism comprises an upper template (7), a lower template (8), an injection gate (9) and an ejection mechanism body (10), wherein the injection gate (9) is arranged at the center of the top of a top plate (6), fixing grooves are formed in the bottom of the top plate (6) and the top of a fixing plate (5), the upper template (7) and the lower template (8) are respectively and fixedly arranged in the fixing grooves in the bottom of the top plate (6) and the top of the fixing plate (5), a stripping plate (11) is arranged in the upper template (7) and the lower template (8), and the ejection mechanism body (10) is arranged in the stripping plate (11).

2. The ejection mechanism for a plastic injection mold according to claim 1, characterized in that: the ejection mechanism body (10) comprises a first thimble (13), a mandril (15), a support rod (19) and a second thimble (21), a sliding groove (12) in the vertical direction is formed in the limiting plate (2) and the supporting plate (3), a first thimble (13) is connected in the sliding groove (12) in a sliding way, the end part of the first thimble (13) passes through the connecting plate (4) and the fixing plate (5), a moving groove (23) is arranged at the end part of the lower template (8) positioned at the first thimble (13), a push rod (15) is connected in the moving groove (23) in a sliding way, the end part of the first thimble (13) is fixedly connected with the bottom of the push rod (15), the outside cover in first thimble (13) top is equipped with and pushes up tight spring (14), the one end of stripper plate (11) bottom is provided with connecting cylinder (16), the tip joint of ejector pin (15) is in connecting cylinder (16).

3. The ejection mechanism for a plastic injection mold according to claim 2, characterized in that: the utility model discloses a stripper plate, including limiting plate (2) and backup pad (3), the one end of keeping away from spout (12) is seted up lift groove (20) of vertical direction in limiting plate (2), and sliding connection has second thimble (21) in lift groove (20), the tip of second thimble (21) passes connecting plate (4) and fixed plate (5), adjustment tank (24) have been seted up to lower bolster (8) inside, and sliding connection has bracing piece (19) in adjustment tank (24), the tip and bracing piece (19) fixed connection of second thimble (21), the outside cover on second thimble (21) top is equipped with expanding spring (22), the bottom of stripper plate (11) is provided with back-off (18), the tip joint of bracing piece (19) is in back-off (18).

4. The ejection mechanism for a plastic injection mold according to claim 2, characterized in that: tooth grooves (17) are formed in the top end of the ejector rod (15), conical teeth are arranged at the lower end of the inner wall of the connecting cylinder (16), and the conical teeth are clamped in the tooth grooves (17).

5. The ejection mechanism for a plastic injection mold according to claim 3, characterized in that: first thimble (13) are located the diameter that inside one end of spout (12) is greater than the diameter that first thimble (13) are located spout (12) outside one end, the diameter that ejector pin (15) are located the inside one end of shifting chute (23) is greater than the diameter that ejector pin (15) are located the outside one end of shifting chute (23), the diameter that second thimble (21) are located the inside one end of lifting chute (20) is greater than the diameter that second thimble (21) are located the outside one end of lifting chute (20), the diameter that bracing piece (19) are located the inside one end of adjusting chute (24) is greater than the diameter that bracing piece (19) are located the outside one end of adjusting chute (24).