Buffer mechanism for plastic injection molding machine

Abstract

The utility model relates to the technical field of injection molding processing, and discloses a buffer mechanism for a plastic injection molding machine, which comprises an upper mold fixing plate and a lower mold fixing plate, a buffer assembly is arranged between the upper mold fixing plate and the lower mold fixing plate, and the buffer assembly comprises an air rod and an air sleeve. One end of the air rod penetrates through the side wall of the corresponding position of the air sleeve in a sliding mode and extends into the air sleeve, when mold closing operation is carried out, the air rod can extrude the air sleeve, the driving piece drives the adjusting piece to carry out adjustment, and therefore the splicing plate drives the splicing arc plates to be closed, buffering operation is carried out, and when mold opening operation is carried out, the air sleeve can be pulled out through the air rod. The air rod can reversely move in the air sleeve, so that the driving piece drives the adjusting piece to adjust, the splicing plate drives the splicing arc plate to be gradually separated, the efficiency of external air entering the air sleeve is improved along with movement of the air rod, and the situation that the mold opening efficiency is affected due to limitation of the air tap is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, and more specifically to a buffer mechanism for a plastic injection molding machine. Background Technology

[0002] Plastic injection molding is a method for rapidly processing and molding plastics. It can complete the molding process quickly and efficiently by injecting raw materials into a designated mold.

[0003] During injection molding, mold closing is usually required. To prevent damage caused by excessive pressure when the upper and lower molds come into contact during mold closing, a buffer mechanism is usually set up to reduce the occurrence of mold damage due to pressure contact.

[0004] Chinese patent discloses a mold opening and closing buffer mechanism for injection molds (publication number CN222156523U). In this patent, by setting up an air rod, an air sleeve, and an air nozzle, the air rod moves inside the air sleeve during the mold closing operation, causing the air rod to compress the air inside the air sleeve. During the discharge process, the air inside the air sleeve is limited by the air flow rate that the air nozzle can pass through, which will counteract the movement speed of the moving mold, thereby achieving the purpose of buffering.

[0005] Although it can achieve effective buffering during mold closing, it is usually restricted by the air nozzle during mold opening, resulting in limited air intake and obstructed air rod movement. This directly affects the mold separation efficiency during mold opening. To address this, we propose a buffering mechanism for plastic injection molding machines. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a buffer mechanism for plastic injection molding machines to solve the problem of buffer mechanisms for plastic injection molding machines.

[0007] The utility model discloses a technical scheme that solves the above technical problem is: a kind of buffer mechanism for plastic injection molding machine, including upper die fixed plate and lower die fixed plate, buffer assembly is arranged between the upper die fixed plate and lower die fixed plate, the buffer assembly includes air rod and air sleeve, one end of air rod is slid through the corresponding position side wall of air sleeve and extends to the inside of air sleeve, the buffer assembly further includes air nozzle piece, air nozzle piece is installed on the side wall of lower die fixed plate far from air sleeve side, the inside of air nozzle piece and air sleeve is interconnected, the air nozzle piece includes the adjusting ring plate of circular ring, the shrinkage groove being opened on the inner ring of adjusting ring plate, the splicing plate moving on shrinkage groove, and the splicing arc plate connected with splicing plate, wherein splicing plate annularly arranged on adjusting ring plate corresponds shrinkage groove position, wherein splicing arc plate is fixedly installed on the position of splicing plate far from shrinkage groove one end, and elastic connecting plate is installed between the adjacent two groups splicing arc plate and splicing plate, annularly arranged splicing arc plate constitutes conical exhaust nozzle, and annularly arranged splicing plate constitutes circular ring connecting disc, the air nozzle piece further includes adjusting piece and driving piece.

[0008] As preferred, the adjusting piece includes adjusting tooth plate, adjusting inclined slot and buckle rod, the adjusting tooth plate is annular disc with external teeth, and the adjusting tooth plate is arranged at the position of adjusting ring plate far from lower die fixed plate side, the adjusting inclined slot is annularly and obliquely arranged on the side wall of adjusting tooth plate, one end of adjusting inclined slot is arranged at the position of adjusting tooth plate side wall close to splicing arc plate side, and the other end of adjusting inclined slot is arranged at the position of adjusting tooth plate side wall far from splicing arc plate side in counterclockwise direction, the buckle rod is fixedly installed at the position of splicing plate close to adjusting tooth plate side, and splicing plate is buckled in adjusting inclined slot of adjusting tooth plate.

[0009] As preferred, the adjusting piece further includes lifting rack, and the lifting rack is arranged at the position corresponding to adjusting tooth plate side, and the lifting rack is provided with teeth matched with adjusting tooth plate at the position close to adjusting tooth plate side.

[0010] As preferred, the driving piece includes push rod, adjusting groove and adjusting rod, the adjusting groove is arranged on the side wall of lifting rack, the push rod is fixedly installed on the side wall of upper die fixed plate, the other end of push rod is slid through the corresponding position side wall of lower die fixed plate and extends to the adjusting groove in lifting rack, and the two ends of adjusting rod are movably installed on the inside top of adjusting groove in lifting rack and the position of push rod far from upper die fixed plate end.

[0011] As preferred, the side wall of lifting rack is provided with movable groove, and the side wall of lower die fixed plate is provided with limiting block at the position corresponding to movable groove in lifting rack, and the limiting block is provided with at least one group, and the end of limiting block far from lower die fixed plate is buckled in movable groove in lifting rack.

[0012] As preferred, the push rod is provided with elastic adjusting piece.

[0013] As preferred, the limiting buckle plate is provided with a connecting block fixedly installed on the side wall of the adjusting ring plate at the end away from the limiting buckle plate.

[0014] As preferred, the inner side of the contraction groove is provided with a buckle groove near the side of the lower die fixed plate, the position of the buckle groove corresponds to the position of the splicing plate, the bottom of the splicing plate is fixedly installed with a limiting block clamped in the buckle groove.

[0015] Compared with the prior art, the utility model has the advantages of the following beneficial effects:

[0016] 1、In the utility model, when carrying out the mold closing operation, the air rod will extrude the air sleeve, so that the driving part drives the adjusting part to adjust, so that the splicing plate drives the splicing arc plate to close, thereby buffering operation is carried out, when carrying out the mold opening operation, the air rod will move reversely in the air sleeve, so that the driving part drives the adjusting part to adjust, so that the splicing plate drives the splicing arc plate to separate gradually, thereby the efficiency of the external air entering the air sleeve is improved along with the movement of the air rod, thereby the situation that the mold opening efficiency is affected due to the limitation of the air nozzle is greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the overall structure schematic diagram of the buffering mechanism for the plastic injection molding machine in the utility model;

[0018] Figure 2 It is the overall structure schematic diagram of the buffering mechanism for the plastic injection molding machine in the utility model; Figure 1 It is the local enlarged structure schematic diagram of A in the utility model;

[0019] Figure 3 It is the local structure schematic diagram of the adjusting tooth plate after the splicing arc plate closes in the utility model;

[0020] Figure 4 It is the local sectional structure schematic diagram of the adjusting ring plate after the splicing arc plate closes in the utility model;

[0021] Figure 5 It is the local plane sectional structure schematic diagram of the splicing plate in the utility model.

[0022] LEGEND:

[0023] 1, upper die fixed plate; 2, lower die fixed plate; 3, air rod; 4, air sleeve; 5, adjusting ring plate; 6, adjusting tooth plate; 7, limiting buckle plate; 8, splicing arc plate; 9, connecting block; 10, lifting rack; 11, movable groove; 12, limiting block; 13, push rod; 14, adjusting groove; 15, adjusting rod; 16, elastic connecting plate; 17, adjusting inclined groove; 18, buckle rod; 19, contraction groove; 20, splicing plate; 21, buckle groove; 22, limiting buckle. DETAILED DESCRIPTION

[0024] The utility model will be further explained below in combination with specific embodiments, however, people skilled in the art should understand that the detailed description given in combination with the drawings is to explain better, the structure of the utility model must be beyond these limited embodiments, and for some equivalent replacement schemes or common means, this paper will not make detailed description, but still belongs to the protection scope of the application.

[0025] Figures 1-5 It is the best embodiment of the utility model, the following will be combined with the drawings Figures 1-5 The utility model will be further explained below in combination with specific embodiments, however, people skilled in the art should understand that the detailed description given in combination with the drawings is to explain better, the structure of the utility model must be beyond these limited embodiments, and for some equivalent replacement schemes or common means, this paper will not make detailed description, but still belongs to the protection scope of the application.

[0026] As Figures 1-5 Shown, a kind of plastic injection molding machine buffer mechanism, including upper die fixed plate 1 and lower die fixed plate 2, upper die fixed plate 1 and lower die fixed plate 2 between are provided with buffer assembly, buffer assembly includes air rod 3 and air sleeve 4, air sleeve 4 is installed on the side wall surface of lower die fixed plate 2 close to upper die fixed plate 1, the inside of air sleeve 4 is hollow, air rod 3 is installed on the side wall surface of upper die fixed plate 1 close to lower die fixed plate 2, the corresponding position side wall of air rod 3 far from the end of upper die fixed plate 1 slidingly penetrates air sleeve 4 and extends to the inside of air sleeve 4, the inside of air sleeve 4 and air rod 3 far from the end of upper die fixed plate 1 size adaptation, buffer assembly further includes air nozzle piece, air nozzle piece is installed on the side wall of lower die fixed plate 2 far from air sleeve 4, and air nozzle piece and the inside of air sleeve 4 are interconnected.

[0027] In the embodiment, through air nozzle piece, gas inside air sleeve 4 is discharged when upper die fixed plate 1 moves close to lower die fixed plate 2 by air rod 3 extrusion.

[0028] Further, the air nozzle piece comprises a circular adjusting ring plate 5, a contraction groove 19 arranged on the inner ring of the adjusting ring plate 5, a splicing plate 20 capable of moving on the contraction groove 19, and a splicing arc plate 8 connected with the splicing plate 20. The splicing plate 20 is arranged in a ring shape on the adjusting ring plate 5 corresponding to the position of the contraction groove 19. The splicing arc plate 8 is fixedly installed on the end of the splicing plate 20 away from the contraction groove 19. The elastic connecting plate 16 is installed between the adjacent two groups of splicing arc plates 8 and splicing plates 20. The elastic connecting plate 16 is made of a material capable of elastic deformation. The ring-shaped splicing arc plate 8 forms a conical exhaust nozzle, and the ring-shaped splicing plate 20 forms a circular ring-shaped connecting disc.

[0029] In the embodiment, the splicing plate 20 moves on the contraction groove 19, so that the adjacent two groups of splicing plates 20 are separated. At the same time, the elastic connecting plate 16 capable of elastic deformation adjusts and deforms to block the gap between the adjacent two groups of splicing plates 20.

[0030] Further, the air nozzle piece further comprises an adjusting piece capable of adjusting the movement of the splicing plate 20 in the contraction groove 19 and a driving piece capable of driving the adjusting piece to adjust.

[0031] In the embodiment, when the upper mold fixed plate 1 moves towards the lower mold fixed plate 2, the driving piece adjusts the adjusting piece, so that the splicing plate 20 drives the splicing arc plate 8 to move in the inner side of the contraction groove 19, so that the multiple groups of splicing plates 20 and splicing arc plates 8 are folded, thereby reducing the exhaust amount when the air rod 3 extrudes the air sleeve 4.

[0032] In the embodiment, when the upper mold fixed plate 1 moves away from the lower mold fixed plate 2, the driving piece adjusts the adjusting piece, so that the splicing plate 20 drives the splicing arc plate 8 to move in the inner side of the contraction groove 19, so that the multiple groups of splicing plates 20 and splicing arc plates 8 are separated, thereby increasing the air intake amount when the air rod 3 moves away from the air sleeve 4.

[0033] Further, the adjusting piece comprises an adjusting tooth plate 6, an adjusting inclined groove 17, and a buckle rod 18. The adjusting tooth plate 6 is a ring-shaped plate provided with external teeth. The adjusting tooth plate 6 is arranged on the side of the adjusting ring plate 5 away from the lower mold fixed plate 2. The adjusting inclined groove 17 is arranged in a ring shape and inclined on the side wall of the adjusting tooth plate 6. One end of the adjusting inclined groove 17 is arranged on the side of the side wall of the adjusting tooth plate 6 close to the splicing arc plate 8. The other end of the adjusting inclined groove 17 is arranged on the side of the side wall of the adjusting tooth plate 6 away from the splicing arc plate 8 in a counterclockwise direction. The buckle rod 18 is fixedly installed on the side of the splicing plate 20 close to the adjusting tooth plate 6, and the splicing plate 20 is buckled in the adjusting inclined groove 17 of the adjusting tooth plate 6.

[0034] In the embodiment, when the adjusting toothed plate 6 rotates counterclockwise, the adjusting inclined grooves 17 and the buckle rods 18 drive the several groups of splicing plates 20 to close; when the adjusting toothed plate 6 rotates clockwise, the adjusting inclined grooves 17 and the buckle rods 18 drive the several groups of splicing plates 20 to separate.

[0035] Further, the adjusting member further comprises a lifting rack 10, which is arranged at one side of the corresponding adjusting toothed plate 6, and the lifting rack 10 is arranged with the tooth matching the adjusting toothed plate 6 at one side of the adjusting toothed plate 6.

[0036] In the embodiment, when the lifting rack 10 descends, the adjusting toothed plate 6 rotates counterclockwise; when the lifting rack 10 ascends, the adjusting toothed plate 6 rotates clockwise.

[0037] Further, the side wall of the lifting rack 10 is provided with a movable groove 11, and the side wall of the lower mold fixed plate 2 is provided with a limiting block 12 corresponding to the position of the movable groove 11 of the lifting rack 10, and the limiting block 12 is arranged at least in one group, and the end of the limiting block 12 away from the lower mold fixed plate 2 is buckled in the movable groove 11 of the lifting rack 10.

[0038] In the embodiment, the movable groove 11 and the limiting block 12 limit the lifting rack 10 in the vertical direction.

[0039] Further, the driving member comprises a push rod 13, an adjusting groove 14 and an adjusting rod 15, the adjusting groove 14 is arranged on the side wall of the lifting rack 10, the push rod 13 is fixedly arranged on the side wall of the upper mold fixed plate 1, the other end of the push rod 13 is slidably arranged through the corresponding position of the side wall of the lower mold fixed plate 2 and extends into the adjusting groove 14 of the lifting rack 10, and the two ends of the adjusting rod 15 are movably arranged on the top inside of the adjusting groove 14 of the lifting rack 10 and the position of the end of the push rod 13 away from the upper mold fixed plate 1.

[0040] In the embodiment, when the upper mold fixed plate 1 moves to the side close to the lower mold fixed plate 2, the push rod 13 drives the bottom of the adjusting rod 15 to move in the matching direction, so that the lifting rack 10 descends under the inclination of the adjusting rod 15, and the lifting rack 10 drives the adjusting toothed plate 6 to rotate counterclockwise; conversely, when the upper mold fixed plate 1 moves to the side away from the lower mold fixed plate 2, the push rod 13 drives the bottom of the adjusting rod 15 to move in the matching direction, so that the lifting rack 10 ascends under the gradual vertical change of the adjusting rod 15, and the lifting rack 10 drives the adjusting toothed plate 6 to rotate clockwise.

[0041] Further, the push rod 13 is provided with an elastic adjusting member.

[0042] In the embodiment, the elastic adjusting member on the pushing rod 13 can be adjusted to adapt to the movement of the adjusting rod 15 to the limit position (i.e., the adjusting rod 15 moves to a position where it cannot drive the lifting rack 10 to descend any further).

[0043] Further, the limiting buckle plate 7 is arranged on the side of the adjusting tooth plate 6 away from the adjusting ring plate 5, the side wall top and bottom of the limiting buckle plate 7 are fixedly installed with the connecting blocks 9, and the connecting blocks 9 are fixedly installed on the side wall of the adjusting ring plate 5 away from the limiting buckle plate 7.

[0044] In the embodiment, the limiting buckle plate 7 and the connecting blocks 9 are used to movably limit the adjusting tooth plate 6.

[0045] Further, the inside of the contraction groove 19 is provided with a buckle groove 21 near the side of the lower mold fixed plate 2, the position of the buckle groove 21 corresponds to the position of the splicing plate 20, the bottom of the splicing plate 20 is fixedly installed with a limiting buckle 22, and the limiting buckle 22 is buckled in the buckle groove 21.

[0046] In the embodiment, the buckle groove 21 and the limiting buckle 22 can limit the moving direction of the splicing plate 20 to prevent the splicing plate 20 from deviating.

[0047] Working principle and use process of the utility model:

[0048] In use, when the mold is closed, the upper mold fixed plate 1 is moved close to the lower mold fixed plate 2, so that the air rod 3 moves in the air sleeve 4 in the adaptive direction, and the driving member drives the adjusting member to adaptively adjust, so that the adjusting member drives the plurality of splicing plates 20 to close, and the corresponding plurality of splicing arc plates 8 are closed, at this time, the closed splicing arc plate 8 forms the narrowest condition, the air rod 3 moves in the air sleeve 4 to extrude the air in the air sleeve 4 to be discharged from the closed splicing arc plate 8, but the air in the air sleeve 4 is limited by the air flow that can pass through the closed splicing arc plate 8 in the discharging process, which can resist the moving speed of the movable mold, so as to slow down the moving speed of the movable mold and form a buffer. When the mold is opened, the upper mold fixed plate 1 is moved away from the lower mold fixed plate 2, so that the air rod 3 moves in the air sleeve 4 in the adaptive direction, the driving member drives the adjusting member to adaptively adjust, so that the adjusting member drives the plurality of splicing plates 20 to separate, and the corresponding plurality of splicing arc plates 8 are separated, at this time, the separated splicing arc plate 8 gradually forms the widest condition, the air rod 3 moves in the air sleeve 4, so that the air rod 3 draws the external air into the air sleeve 4 through the splicing arc plate 8, with the movement of the air rod 3, the splicing arc plate 8 adaptively widens, so as to avoid that the small opening of the splicing arc plate 8 leads to low air inflow efficiency into the air sleeve 4, thereby affecting the movement of the air rod 3 and the opening efficiency.

[0049] The above is only the preferred embodiment of the present application, and is not intended to limit the present application in other forms. Any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments. However, any simple modification, equivalent change and modification of the above embodiments without departing from the technical solution of the present application, according to the technical essence of the present application, still belongs to the protection scope of the technical solution of the present application.

Claims

1. A buffer mechanism for a plastic injection molding machine, comprising an upper mold fixed plate (1) and a lower mold fixed plate (2), a buffer assembly is arranged between the upper mold fixed plate (1) and the lower mold fixed plate (2), the buffer assembly comprises a gas rod (3) and a gas sleeve (4), one end of the gas rod (3) slides through the corresponding position side wall of the gas sleeve (4) and extends to the inside of the gas sleeve (4), the buffer assembly further comprises a gas nozzle piece, the gas nozzle piece is installed on the side wall of the lower mold fixed plate (2) away from the gas sleeve (4), the gas nozzle piece and the inside of the gas sleeve (4) are in communication with each other, characterized in that: The air nozzle piece includes a circular adjusting ring plate (5), a contraction groove (19) opened on the inner circle of the adjusting ring plate (5), a splicing plate (20) moving on the contraction groove (19), and a splicing arc plate (8) connected with the splicing plate (20), wherein the splicing plate (20) is annularly arranged on the adjusting ring plate (5) at a position corresponding to the contraction groove (19), the splicing arc plate (8) is fixedly installed on the splicing plate (20) at a position away from the contraction groove (19), a elastic connecting plate (16) is installed between the splicing arc plate (8) and the splicing plate (20) of two adjacent groups, the annularly arranged splicing arc plate (8) forms a conical exhaust nozzle, and the annularly arranged splicing plate (20) forms a circular connecting disc.

2. The cushioning mechanism for a plastic injection molding machine according to claim 1, characterized in that: The adjusting member includes an adjusting tooth plate (6), an adjusting inclined groove (17), and a buckle rod (18), the adjusting tooth plate (6) is an annular disc provided with external teeth, the adjusting tooth plate (6) is arranged on the adjusting ring plate (5) at a position away from the lower mold fixed plate (2), the adjusting inclined groove (17) is annularly and obliquely arranged on the side wall of the adjusting tooth plate (6), one end of the adjusting inclined groove (17) is arranged at a position on the side wall of the adjusting tooth plate (6) close to the splicing arc plate (8), and the other end of the adjusting inclined groove (17) is arranged at a position on the side wall of the adjusting tooth plate (6) away from the splicing arc plate (8) in the counterclockwise direction, and the buckle rod (18) is fixedly installed on the splicing plate (20) at a position close to the adjusting tooth plate (6) and buckled in the adjusting inclined groove (17) of the adjusting tooth plate (6).

3. The cushioning mechanism for a plastic injection molding machine according to claim 2, wherein: The adjusting member further includes a lifting rack (10) arranged at a position corresponding to one side of the adjusting tooth plate (6), and the lifting rack (10) is provided with teeth close to the adjusting tooth plate (6) on one side.

4. The cushioning mechanism for a plastic injection molding machine according to claim 3, wherein: The driving member includes a push rod (13), an adjusting groove (14), and an adjusting rod (15), the adjusting groove (14) is arranged on the side wall of the lifting rack (10), the push rod (13) is fixedly installed on the side wall of the upper mold fixed plate (1), the other end of the push rod (13) is slidably penetrated through the side wall of the lower mold fixed plate (2) at a corresponding position and extends into the adjusting groove (14) of the lifting rack (10), and the two ends of the adjusting rod (15) are movably installed on the top inside of the adjusting groove (14) of the lifting rack (10) and on the end of the push rod (13) away from the upper mold fixed plate (1).

5. The cushioning mechanism for a plastic injection molding machine according to claim 3, wherein: An active groove (11) is arranged on the side wall of the lifting rack (10), and a limiting block (12) is installed on the side wall of the lower mold fixed plate (2) at a position corresponding to the active groove (11) of the lifting rack (10), the limiting block (12) is arranged at least in one group, and the end of the limiting block (12) away from the lower mold fixed plate (2) is buckled in the active groove (11) of the lifting rack (10).

6. The cushioning mechanism for a plastic injection molding machine according to claim 4, wherein: The push rod (13) is provided with an elastic adjusting member.

7. The cushioning mechanism for a plastic injection molding machine according to claim 2, wherein: The limiting buckle plate (7) is provided on the side away from the adjusting ring plate (5) of the adjusting tooth plate (6), the side wall top and bottom of the limiting buckle plate (7) are fixedly installed with connecting blocks (9), and the one end of the connecting block (9) away from the limiting buckle plate (7) is fixedly installed on the side wall of the adjusting ring plate (5).

8. The cushioning mechanism for a plastic injection molding machine according to claim 1, wherein: The inner side of the shrinkage groove (19) is provided with a buckle groove (21) near the side of the lower mold fixed plate (2), the position of the buckle groove (21) corresponds to the position of the splicing plate (20), the bottom of the splicing plate (20) is fixedly installed with a limiting buckle (22), and the limiting buckle (22) is buckled in the buckle groove (21).

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