CN211105301U

CN211105301U - Side sprue injection mold for in-mold cutting and separating

Info

Publication number: CN211105301U
Application number: CN201921798284.8U
Authority: CN
Inventors: 陈晓平
Original assignee: Bahai Precision Molding Suzhou Co ltd
Current assignee: Bahai Precision Molding Suzhou Co ltd
Priority date: 2019-10-24
Filing date: 2019-10-24
Publication date: 2020-07-28
Anticipated expiration: 2029-10-24

Abstract

The utility model discloses a side runner injection mold for cutting off separation in mould relates to injection mold technical field, aims at solving the drawing of patterns when ejecting, and runner and product are ejecting together, makes the problem of product and runner separation by artifical secondary operation again. Its technical scheme main points are, including the movable mould board that is parallel to each other and sets gradually, go up the push pedal one, go up the push pedal two, push down the pedal one, push down the pedal two and movable mould bottom plate, be provided with the slider body in the movable mould board, be provided with the eccentric waist round hole that runs through slider body top surface and bottom surface on the slider body, go up to wear to be equipped with the slider guide pin on the push pedal two, the slider guide pin is including the inclined plane guide section and the vertical section that links to each other that insert eccentric waist round hole, the terminal surface that inclined plane guide section was kept away from to vertical section offsets with the. When the mold is ejected after being opened, the slide block body is driven by the slide block guide pin to move outwards, so that the sprue is cut off, and the purpose of automatically separating the sprue of the side sprue injection mold from a product is achieved.

Description

Side sprue injection mold for in-mold cutting and separating

Technical Field

The utility model belongs to the technical field of injection mold's technique and specifically relates to a side runner injection mold that is used for cutting off separation in mould.

Background

The gating system of the injection mold generally includes a main runner, a sub-runner and a plurality of gates, the gates are communicated with the cavities of the injection mold, and the molten material enters the main runner from a nozzle of the injection molding machine, is distributed through the sub-runner, and then enters each cavity of the mold through each gate. In an injection mold, a mold ejector pin is generally used, and the mold ejector pin moves up and down to eject a molded product in the mold.

Referring to fig. 1, a conventional gating system includes a runner 1 and a gate 11 connected to the runner 1, wherein a molten material enters the runner 1 from a nozzle of an injection molding machine, enters a cavity of a mold through the gate 11, and is finally injection molded to form a product 12.

The above prior art solutions have the following drawbacks: when the product 12 of the conventional side gate injection mold is ejected in a demolding manner, the runner 1 and the product 12 are ejected together, secondary processing is carried out manually, so that the product 12 is separated from the runner 1, the processing steps are complicated, and in addition, the secondary processing is carried out manually, so that the product defect is caused due to manual operation problems, and further improvement is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a side runner injection mold for cutting off separation in mould, it has the effect that realizes runner and product autosegregation in the mould of side runner injection mold.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides a side runner injection mold for cutting off separation in mould, includes the movable mould board that is parallel to each other and sets gradually, goes up push pedal one, goes up push pedal two, pushes down push pedal one, pushes down push pedal two and movable mould bottom plate down, be provided with slider body in the movable mould board, be provided with the eccentric waist round hole that runs through slider body top surface and bottom surface on the slider body, upward wear to be equipped with the slider guide pin on the push pedal one, the slider guide pin is including the inclined plane guide section and the continuous vertical section that insert eccentric waist round hole, the terminal surface that inclined plane guide section was kept away from to the vertical section offsets with the top surface of last push pedal two.

The utility model discloses further set up to: the eccentric amount of the eccentric waist circular hole is 0.2 mm.

The utility model discloses further set up to: the slider body is provided with a slider insert, and the sprue and part of the runner are arranged on the top surface of the slider insert.

The utility model discloses further set up to: and the second upper push plate is fixedly provided with an ejector piece with an inverted T-shaped section, the ejector piece comprises an ejector rod inserted into the first lower push plate and the second lower push plate and an ejector block extending out of the second lower push plate, the outer diameter of the ejector block is larger than that of the ejector rod, and the movable die bottom plate is provided with a through hole for accommodating the ejector block.

The utility model discloses further set up to: the thickness of the top block is smaller than that of the movable mould bottom plate, and the distance between the top surface of the top block and the bottom surface of the lower push plate is 2-3 mm.

The utility model discloses further set up to: and the movable template and the movable mold bottom plate are internally provided with a push plate guide pillar, and the push plate guide pillar sequentially penetrates through the lower push plate II, the lower push plate I, the upper push plate II and the upper push plate I.

To sum up, the utility model discloses a beneficial technological effect does:

1. through the arrangement of the slide block guide pin and the eccentric waist circular hole, when the mold is ejected after being opened, the slide block body is driven by the slide block guide pin to move outwards, so that a sprue is cut off, the automatic separation of the sprue of the side sprue injection mold and a product is realized, and manual secondary processing is not needed;

2. through the arrangement of the ejection piece, when the die is opened and ejected, the ejection piece firstly drives the first upper push plate and the second upper push plate to move, the first upper push plate and the second upper push plate drive the guide pin of the slide block to move forwards, and because a gap exists between the top surface of the ejection block and the bottom surface of the second lower push plate, the first lower push plate and the second lower push plate cannot move, and a product and a flow channel cannot be ejected; at the moment, the vertical section of the slide block guide pin enters the eccentric waist circular hole, the slide block body is driven by the slide block guide pin to move 0.2mm outwards, and the width of the sprue is only 0.1mm, so that the sprue is cut off by the slide block insert, and the separation of the sprue and a product is realized; and the ejection action is continuously carried out, the first lower push plate and the second lower push plate are driven by the ejection piece to move forwards, and the product and the flow channel are ejected forwards together, so that the product with the separated sprue and the flow channel are ejected out of the mold by the ejector pins together.

Drawings

FIG. 1 is a schematic diagram of the overall construction of a gating system in the background art;

FIG. 2 is an enlarged schematic view of portion A of FIG. 1;

fig. 3 is a schematic sectional structure diagram of the embodiment of the present invention;

FIG. 4 is an enlarged schematic view of portion B of FIG. 3;

fig. 5 is a schematic sectional structure diagram ii according to an embodiment of the present invention;

fig. 6 is an enlarged schematic view of a portion C in fig. 5.

In the figure, 1, a flow channel; 11. a gate; 12. producing a product; 2. moving the template; 21. a first upper push plate; 22. a second push plate is arranged; 3. a movable mold base plate; 31. a first lower push plate; 32. a second lower push plate; 4. a slider body; 41. an eccentric waist circular hole; 42. a slider insert; 5. a slider guide pin; 51. a ramp guide section; 52. a vertical section; 6. ejecting the part; 61. a top rod; 62. a top block; 7. a through hole; 8. and (4) pushing a plate guide post.

Detailed Description

The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.

Referring to fig. 3 and 5, for the utility model discloses a side runner injection mold for cutting off separation in mould, including the movable mould board 2 that is parallel to each other and sets gradually, go up push pedal one 21, go up push pedal two 22, push down board one 31, push down board two 32 and movable mould bottom plate 3 down, be provided with push pedal guide pillar 8 in movable mould board 2 and the movable mould bottom plate 3, push pedal guide pillar 8 passes push down board two 32, push down board one 31, go up push pedal two 22 and go up push pedal one 21 in proper order. The upper layer push plate and the lower layer push plate are guided by a shared push plate guide post 8 and a guide sleeve. The first lower push plate 31 and the second lower push plate 32 are fixed with product thimbles and flow channel thimbles. After entering the runner 1 from the nozzle of the injection molding machine, the melt enters the cavity of the mold through the gate 11, and finally the product 12 is injection molded, wherein the width of the gate 11 is 0.1mm in the embodiment.

Referring to fig. 5 and 6, a slider body 4 is arranged in the movable die plate 2, a slider insert is fixed on the slider body 4 by screws, and the gate 11 and part of the runner 1 are arranged on the top surface of the slider insert 42. The slider body 4 is provided with an eccentric waist circular hole 41 penetrating through the top surface and the bottom surface of the slider body 4, and in this embodiment, the eccentric amount of the eccentric waist circular hole 41 is 0.2 mm. A slider guide pin 5 is arranged on the first push plate 21 in a penetrating way, and the slider guide pin 5 comprises a slope guide section 51 inserted into the eccentric waist round hole 41 and a vertical section 52. The inclined guide section 51 and the vertical section 52 are integrally formed, and the end surface of the vertical section 52 far away from the inclined guide section 51 is abutted against the top surface of the second push plate 22. Before the mold opening and ejection, the slider guide pin 5 only has the inclined guide section 51 of the head part in the eccentric waist-round hole 41 of the slider body 4, and cannot drive the slider body 4 to move. During the ejecting action after the mold is opened, the slider guide pin 5 moves forwards, the vertical section 52 of the slider guide pin 5 enters the eccentric waist-round hole 41 on the slider body 4, the slider body 4 is driven by the slider guide pin 5 to move 0.2mm outwards, and the width of the gate 11 is only 0.1mm, so that the gate 11 is cut off by the slider insert 42, and the separation of the gate 11 and the product 12 is realized.

Referring to fig. 3 and 4, the bottom surface of the second upper push plate 22 is fixed with the ejection member 6 with an inverted T-shaped cross section by screws, the ejection member 6 includes an ejector rod 61 inserted into the first lower push plate 31 and the second lower push plate 32 and an ejector block 62 extending out of the second lower push plate 32, and the ejector rod 61 and the ejector block 62 are integrally formed. The outer diameter of the ejector block 62 is larger than that of the ejector rod 61, a through hole 7 for accommodating the ejector block 62 is formed in the movable mold bottom plate 3, and the through hole 7 penetrates through the top surface and the bottom surface of the movable mold bottom plate 3. The thickness of the top block 62 is smaller than that of the movable mold bottom plate 3, and a gap (i.e., a delay amount) of 2-3mm is formed between the top surface of the top block 62 and the bottom surface of the lower push plate II 32. When the mold is opened and then ejected, due to the existence of the ejector 6, the ejector 6 firstly drives the first push plate 21 and the second push plate 22 to move, the first push plate 21 and the second push plate 22 drive the slider guide pin 5 to move forwards, and due to the delay amount of the ejector 6, the first push plate 31 and the second push plate 32 cannot move before the delay amount stroke reaches, that is, the product and the runner ejector pin cannot be actuated, and the product and the runner cannot be ejected. Because the slider guide pin 5 moves forwards, the vertical section 52 of the slider guide pin 5 enters the eccentric waist-round hole 41 on the slider body 4, the slider body 4 is driven by the slider guide pin 5 to move 0.2mm outwards, and because the width of the gate 11 is only 0.1mm, the gate 11 is cut off by the slider insert 42, and the separation of the gate 11 and the product 12 is realized. Then, as the ejection action continues, after the bottom surface of the ejector block 62 moves to abut against the bottom surface of the lower push plate 32 (i.e. exceeds the set delay), the lower push plate 31 and the lower push plate 32 are driven by the ejector block 62 to move forward, and the product and the thimble of the runner perform the forward ejection action together, so that the product 12 after the sprue separation and the runner 1 are ejected out of the mold together by the thimble.

The implementation principle of the embodiment is as follows: when the mold is opened and then ejected, due to the existence of the ejector 6, the ejector 6 firstly drives the first push plate 21 and the second push plate 22 to move, the first push plate 21 and the second push plate 22 drive the slider guide pin 5 to move forwards, and due to the delay amount of the ejector 6, the first push plate 31 and the second push plate 32 cannot move before the delay amount stroke reaches, that is, the product and the runner ejector pin cannot be actuated, and the product and the runner cannot be ejected. Because the slider guide pin 5 moves forwards, the vertical section 52 of the slider guide pin 5 enters the eccentric waist-round hole 41 on the slider body 4, the slider body 4 is driven by the slider guide pin 5 to move 0.2mm outwards, and because the width of the gate 11 is only 0.1mm, the gate 11 is cut off by the slider insert 42, and the separation of the gate 11 and the product 12 is realized.

Then, as the ejection action is continuously carried out, after the bottom surface of the ejector block 62 moves to abut against the bottom surface of the lower ejector plate 32 (namely, the set delay amount is exceeded), the lower ejector plate 31 and the lower ejector plate 32 are driven by the ejector block 62 to move forwards, and the product and the ejector pins of the runner are ejected forwards together, so that the product 12 after the sprue separation and the runner 1 are ejected out of the die together by the ejector pins without manual secondary processing. The mold is simple in operation and the gate cutting operation is highly reliable. The ejector pin ejection mechanism does not affect the repeated ejection action of the ejector pin of the product, and has stable function and low product reject ratio.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A side gate injection mold for cutting and separating in a mold is characterized in that: including movable mould board (2), the first (21) of push up pedal, the second (22) of push up pedal, the first (31) of push down pedal, the second (32) of push down pedal and movable mould bottom plate (3) that are parallel to each other and set gradually, be provided with slider body (4) in movable mould board (2), be provided with eccentric waist round hole (41) that run through slider body (4) top surface and bottom surface on slider body (4), wear to be equipped with slider guide pin (5) on the first (21) of push up pedal, slider guide pin (5) are including inclined plane guide section (51) and the vertical section (52) that links to each other that insert eccentric waist round hole (41), the terminal surface that inclined plane guide section (51) was kept away from in vertical section (52) offsets with the top surface of the second (22) of push up pedal.

2. A side-gated injection mold for in-mold cutoff separation according to claim 1, wherein: the eccentric amount of the eccentric waist circular hole (41) is 0.2 mm.

3. A side-gated injection mold for in-mold cutoff separation according to claim 2, wherein: the sliding block body (4) is provided with a sliding block insert (42), and the sprue (11) and the partial runner (1) are arranged on the top surface of the sliding block insert (42).

4. A side-gated injection mold for in-mold cutoff separation according to claim 1, wherein: and an ejection part (6) with an inverted T-shaped section is fixed on the bottom surface of the upper push plate II (22), the ejection part (6) comprises an ejector rod (61) inserted in the lower push plate I (31) and the lower push plate II (32) and an ejector block (62) extending out of the lower push plate II (32), the outer diameter of the ejector block (62) is larger than that of the ejector rod (61), and a through hole (7) for accommodating the ejector block (62) is formed in the movable mold bottom plate (3).

5. A side-gated injection mold for in-mold cutoff separation according to claim 4, wherein: the thickness of the top block (62) is smaller than that of the movable mold bottom plate (3), and the distance between the top surface of the top block (62) and the bottom surface of the second lower push plate (32) is 2-3 mm.

6. A side-gated injection mold for in-mold cutoff separation according to claim 1, wherein: and push plate guide posts (8) are arranged in the movable die plate (2) and the movable die bottom plate (3), and the push plate guide posts (8) sequentially penetrate through a lower push plate II (32), a lower push plate I (31), an upper push plate II (22) and an upper push plate I (21).