CN111660512A - Internal core-pulling demoulding mechanism with whole-circle annular internal buckling position - Google Patents

Internal core-pulling demoulding mechanism with whole-circle annular internal buckling position Download PDF

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Publication number
CN111660512A
CN111660512A CN202010402111.0A CN202010402111A CN111660512A CN 111660512 A CN111660512 A CN 111660512A CN 202010402111 A CN202010402111 A CN 202010402111A CN 111660512 A CN111660512 A CN 111660512A
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CN
China
Prior art keywords
pulling
internal
core
inclined top
whole
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Pending
Application number
CN202010402111.0A
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Chinese (zh)
Inventor
高永生
陈建文
李磊
漆良涛
汪光卫
叶学海
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College of Science and Technology of Ningbo University
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College of Science and Technology of Ningbo University
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Priority to CN202010402111.0A priority Critical patent/CN111660512A/en
Publication of CN111660512A publication Critical patent/CN111660512A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
    • B29C45/332—Mountings or guides therefor; Drives therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/40—Removing or ejecting moulded articles
    • B29C45/44—Removing or ejecting moulded articles for undercut articles

Abstract

The invention provides an internal core-pulling demoulding mechanism with a whole-circle annular internal buckling position, which comprises a fixed mould plate, an inclined guide pillar fixing seat, an inclined guide pillar, a sliding block, a movable mould plate and a first group of inclined ejectors A1～A6A second group of pitched roof B1～B6The device comprises a positioning pin, an inclined top connecting rod, an inner hexagon screw, an inclined top sliding block, a push rod fixing plate, a push plate, a sizing block and an inclined top guide seat. Two groups of inclined tops with different slopes are designed at the position of the whole ring of annular reverse buckle, and the two groups of 12 inclined tops are arranged alternatively in 12 equal parts around the inclined top guide seat. The one-time synchronous core pulling of the whole ring of annular back-off positions is realized by utilizing the position difference generated in the inner core pulling direction by the angle difference of the two groups of inclined tops. The invention has simple integral mechanism, compact structure, stable work, safety, reliability, convenient use and low mechanism manufacturing cost, and is beneficial to reducing the integral cost of the die.

Description

Internal core-pulling demoulding mechanism with whole-circle annular internal buckling position
Technical Field
The invention relates to the field of injection mold mechanism design, in particular to an internal core-pulling demolding mechanism with a whole-circle annular internal buckling position.
Background
For injection-molded parts with internal side convex and side concave or shaped holes, a core-pulling and demolding mechanism is usually arranged at the corresponding part of the mold, so that the side mold core can be pulled away from the inner molded surface of the plastic part during demolding. However, the common internal core-pulling or side core-pulling mechanism cannot solve the core-pulling and demolding problem of all industrial injection molding products. Along with the diversification of industrial product design, there is whole circle annular back-off in some inside depths of goods, and the structure receives the restriction moreover, brings great difficulty for setting up of mechanism of loosing core. The part related to the invention is a main machine shell, the internal structure of the shell is complex, the precision requirement is high, the greatest difficulty is that the position of the inside close to the top end is provided with a whole circle of annular inverted radial ribs, the positions of the radiating mesh holes on the periphery are circumferentially arranged in equal parts of 360 degrees and 12 degrees, and three inner recesses are arranged on equal parts of 120 degrees. The above structures are restricted with each other, which brings great difficulty to the design and manufacture of the die. Therefore, a special novel internal core-pulling demoulding mechanism needs to be designed.
Disclosure of Invention
The invention aims to solve the technical problem of providing an internal core-pulling demoulding mechanism with a whole-circle annular internal buckling position, which has the advantages of reasonable design, compact structure, stable work, safety, reliability and convenient use; in order to solve the above-mentioned existing technical problem, the invention adopts the following technical scheme:
an inner core-pulling demoulding mechanism of a whole-circle annular inner buckling position comprises a fixed mould plate, an inclined guide pillar fixing seat, an inclined guide pillar, a sliding block, a movable mould plate and an inclined top A3Oblique top A3Connecting rod, pitched roof A3Sliding block, push rod fixing plate, push plate, sizing block and inclined top B5Oblique top B5Connecting rod, pitched roof B5Sliding block, oblique top guide holder, socket head cap screw.
Preferably, in the mechanism, the inner core-pulling demolding mechanism is used for demolding with the characteristics of a whole-circle inner ring groove; the fixed die plate, the movable die plate and the sizing block are die plates of the die and are used for installing, fixing or supporting formed parts and other diesEach part mechanism; the inclined guide post fixing seat, the inclined guide post and the sliding block form a die inclined guide post lateral core-pulling mechanism which is used for laterally pulling a convex lateral concave side of the mouth part of the plastic part and simultaneously separating the sliding block from the inclined top to enable the inclined top to generate an ejecting space; pitched roof A3Oblique top A3Connecting rod, pitched roof A3The sliding block, the inner hexagon screw and the positioning pin form a first group of inclined ejector B5Oblique top B5Connecting rod, pitched roof B5The sliding block, the inner hexagon screw and the positioning pin form a second group of inclined ejector, and the two groups of inclined ejectors are installed on the inclined ejector guide seat to guide the movement of the two groups of inclined ejectors and jointly complete the inner core-pulling demoulding of the whole ring of annular inner buckling positions.
Preferably, in the mechanism, the first group of the pitched roofs has six pitched roofs, namely pitched roof A1、A2、A3、A4、A5、A6. Six second group of inclined roofs are also arranged, and the second group of inclined roofs are respectively the inclined roofs B1、B2、B3、B4、B5、B6(ii) a The 12 inclined roofs of the two groups of inclined roofs are arranged at intervals at 12 equal parts around the inclined roof guide seat.
Preferably, in the mechanism, the number B1、B2、B3、B4、B5、B6The included angle between the inclined top dovetail groove and the central axis of the inclined top guide seat is 6 degrees.
Preferably, in the mechanism, the number A1、A2、A3、A4、A5、A6The included angle between the inclined top dovetail groove and the central axis of the inclined top guide seat is 2.6 degrees.
Preferably, in the mechanism, the one-time synchronous core pulling of the whole ring of annular inner buckling positions is realized by utilizing the position difference generated in the inner core pulling direction by the angle difference of the two groups of inclined tops.
Preferably, in the mechanism, the inclined top guide seat, namely the movable mold core, is fixed on the movable mold plate through an inner hexagonal screw. The oblique ejector and the oblique ejector guide seat are in sliding connection in a dovetail groove mode.
The invention solves the technical problems that: a novel inner core-pulling demoulding mechanism consisting of 12 inclined ejectors is designed, the 12 inclined ejectors are divided into two groups, the inclination of each inclined ejector group is different, and the two groups of inclined ejectors radially move towards the central axis of a main machine shell at different speeds to complete the core-pulling action of the plastic parts. The beneficial effects that reach are: the one-time synchronous core pulling of the whole ring of annular back-off positions is realized by utilizing the position difference generated in the inner core pulling direction by the angle difference of the two groups of inclined tops.
Compared with the problem that the whole ring of annular inner buckling positions are difficult to demould in the prior art, the invention has the beneficial effects that: the mechanism is simple, the structure is compact, the work is stable, the safety and the reliability are realized, the use is convenient, and the manufacturing cost is low.
Drawings
FIG. 1 is a schematic view of the slanted ejecting arrangement and the inner core-pulling direction
FIG. 2 is a schematic view of an internal core-pulling and demolding mechanism
FIG. 3 is a schematic view of the fully extracted state of the inner core-pulling structure
FIG. 4 is a schematic diagram of the state before and after core stripping
In the figure, a fixed template (1), an inclined guide post fixing seat (2), an inclined guide post (3), a slide block (4), a movable template (5) and an inclined top A3(6) Positioning pin (7) and inclined top A3Connecting rod (8), inner hexagon screw (9) and inclined top A3A sliding block (10), a push rod fixing plate (11), a push plate (12), a sizing block (13) and an inclined top B5(14) Positioning pin (15) and inclined top B5A connecting rod (16), an inner hexagon screw (17) and an inclined top B5A sliding block (18), an inclined top guide seat (19), an inner hexagon screw (20)
Detailed Description
For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the advantages and spirit of the present invention will be further understood by reference to the following detailed description and the accompanying drawings.
The related structure of the invention mainly comprises the following parts: fixed die plate, inclined guide pillar fixing seat, inclined guide pillar, sliding block, movable die plate and inclined ejector A3Oblique top A3Connecting rod, pitched roof A3Sliding block, push rod fixing plate, push plate, sizing block and inclined top B5Oblique top B5Connecting rod, pitched roof B5Sliding block, oblique top guide holder, socket head cap screw.
In the mechanism, as shown in fig. 2, a fixed template (1), a movable template (5) and a sizing block (13) are templates of a mold and are used for installing, fixing or supporting a forming part and other parts of the mold; the inclined guide post fixing seat (2), the inclined guide post (3) and the sliding block (4) form a die inclined guide post lateral core-pulling mechanism which is used for laterally pulling a convex side and a concave side of an opening part of a plastic part, and simultaneously, the sliding block is separated from the inclined top, so that the inclined top generates a push-out space; pitched roof A3(6) Positioning pin (7) and inclined top A3Connecting rod (8), inner hexagon screw (9) and inclined top A3The sliding blocks (10) form a first group of inclined ejector B5(14) Positioning pin (15) and inclined top B5A connecting rod (16), an inner hexagon screw (17) and an inclined top B5The sliding block (18) forms a second group of inclined ejector, and the two groups of inclined ejectors are arranged on an inclined ejector guide seat (19) to guide the movement of the two groups of inclined ejectors and jointly complete the internal core-pulling demoulding of the whole-circle annular internal buckling position.
In the mechanism, as shown in fig. 1, the core pulling mechanism of the whole ring of annular inverted radial ribs is designed into two groups of inclined top components by combining the structural characteristics of a plastic part, wherein each group comprises 6 inclined tops and 12 inclined tops. The first group of six pitched roofs are respectively: pitched roof A1、A2、A3、A4、A5、A6. The six oblique tops of the second group of oblique tops are respectively: pitched roof B1、B2、B3、B4、B5、B6(ii) a The 12 inclined roofs of the two groups of inclined roofs are arranged at intervals at 12 equal parts around the inclined roof guide seat. The oblique ejector and the oblique ejector guide seat are in sliding connection in a dovetail groove mode. First group of pitched roof A1、A2、A3、A4、A5、A6The included angle between the dovetail groove of the pitched roof and the central axis of the guide seat (19) of the pitched roof is 2.6 degrees, and the second group of the pitched roofs B1、B2、B3、B4、B5、B6The included angle between the inclined top dovetail groove and the central axis of the inclined top guide seat (19) is 6 degrees.
In the mechanism, as shown in fig. 1 and 2, an inclined top guide seat (19), namely a movable mold core, is fixed on a movable mold plate (5) through an inner hexagon screw (20). In order to prevent the inclined top from turning laterally and ensure the sufficient positioning distance of the inclined top, the movable template is also provided with a dovetail groove, and the guide seat of the inclined top and the movable template need to adopt a combined processing technique. The sliding block component comprises a sliding block, a sliding block pressing strip, an inclined guide post and an inclined guide post fixing seat. The sliding block (4) is arranged on the movable template (5) through a sliding block pressing strip, the sliding block can only do sliding motion along the core-pulling direction, and the degree of freedom must be limited in other directions. The inclined guide post (3) is fixed on the fixed die plate (1) through an inclined guide post fixing seat (2).
In actual operation, as shown in fig. 3 and 4, the operation process of the internal core-pulling and demolding mechanism is as follows:
and (3) opening the mold after the injection molding and filling are finished, driving the slide block to laterally loose the core of the mouth part of the shape of the plastic part by utilizing the action of opening the mold through an inclined guide pillar fixed on the fixed mold plate, and simultaneously separating the slide block from the inclined top to enable the inclined top to generate an ejecting space. After the mold opening action is finished, the push plate and the push rod fixing plate are driven by an ejection system of the injection molding machine, so that all the inclined top sliding blocks (10) and (18) fixed between the push plate and the push rod fixing plate are driven, the inclined top sliding blocks drive inclined top connecting rods (8) and (16) fixed by inner hexagonal screws (9) and (17), and the inclined top connecting rods drive inclined tops (6) and (14) connected by positioning pins (7) and (15) to push the inclined tops (6) and (14) forwards. Meanwhile, the ejection stroke is controlled by the ejection limiting column arranged on the push rod fixing plate, so that the interference caused by the fact that the inclined ejector passes through the top is avoided. And the ejection action of the injection molding machine is stopped, after the mechanical arm takes out the plastic part, the push plate and the push rod fixing plate are reset in advance through the ejector rod of the injection molding machine, so that all the inclined ejectors are reset, and the mold is closed through a control signal of the travel switch.
The mechanism mainly utilizes the position difference generated in the inner core-pulling direction by the angle difference of the two groups of inclined tops to realize the one-time synchronous core-pulling of the whole ring of annular back-off positions. Oblique top B with larger angle in propelling process1、B2、B3、B4、B5、B6Pitched roof A with smaller angle1、A2、A3、A4、A5、A6The speed of the movement towards the central axis of the pitched roof guide seat canSlightly faster, thereby solving the problem of mutual interference between the pitched roofs. It is important to note that the angular difference between the two sets of pins must be doubled or more.
The invention has the advantages of simple mechanism, compact structure, stable operation, safety, reliability, convenient use and low manufacturing cost.
The present invention has been made into practical sample and tested for several times of continuous use, and the practical value is proved to be undoubted.
The embodiments described herein are merely illustrative of the spirit of the invention and various modifications, additions and substitutions may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (7)

1. An inner core-pulling demoulding mechanism of a whole-circle annular inner buckling position comprises a fixed mould plate (1), an inclined guide post fixing seat (2), an inclined guide post (3), a sliding block (4), a movable mould plate (5) and an inclined top A3(6) Positioning pin (7) and inclined top A3Connecting rod (8), inner hexagon screw (9) and inclined top A3A sliding block (10), a push rod fixing plate (11), a push plate (12), a sizing block (13) and an inclined top B5(14) Positioning pin (15) and inclined top B5A connecting rod (16), an inner hexagon screw (17) and an inclined top B5A sliding block (18), an inclined top guide seat (19) and an inner hexagon screw (20).
2. The internal core-pulling demolding mechanism for the full-circle annular internal buckling position according to claim 1, wherein the internal core-pulling demolding mechanism is used for demolding with the full-circle internal annular groove characteristic; the fixed template (1), the movable template (5) and the sizing block (13) are templates of the die and are used for installing, fixing or supporting the formed parts and other parts of the die; the inclined guide post fixing seat (2), the inclined guide post (3) and the sliding block (4) form a die inclined guide post lateral core-pulling mechanism which is used for laterally pulling a convex side and a concave side of an opening part of a plastic part, and simultaneously, the sliding block is separated from the inclined top, so that the inclined top generates a push-out space; pitched roof A3(6) Positioning pin (7) and inclined topA3Connecting rod (8), inner hexagon screw (9) and inclined top A3The sliding blocks (10) form a first group of inclined ejector B5(14) Positioning pin (15) and inclined top B5A connecting rod (16), an inner hexagon screw (17) and an inclined top B5The sliding block (18) forms a second group of inclined ejector, and the two groups of inclined ejectors are arranged on an inclined ejector guide seat (19) to guide the movement of the two groups of inclined ejectors and jointly complete the internal core-pulling demoulding of the whole-circle annular internal buckling position.
3. The internal core-pulling demoulding mechanism with the whole-circle annular internal buckling position according to claim 1, wherein the first group of the internal core-pulling demoulding mechanism comprises six inclined tops, namely the inclined tops A1、A2、A3、A4、A5、A6. Six second group of inclined roofs are also arranged, and the second group of inclined roofs are respectively the inclined roofs B1、B2、B3、B4、B5、B6(ii) a The 12 inclined roofs of the two groups of inclined roofs are arranged at intervals at 12 equal parts around the inclined roof guide seat (19).
4. The internal core-pulling demoulding mechanism with the whole-circle annular internal buckling position according to claim 1, wherein the number B of the internal core-pulling demoulding mechanism is1、B2、B3、B4、B5、B6The included angle between the inclined top dovetail groove and the central axis of the inclined top guide seat (19) is 6 degrees.
5. The internal core-pulling demolding mechanism for the full-circle annular internal buckling position according to claim 1, wherein the number A of the internal core-pulling demolding mechanism is1、A2、A3、A4、A5、A6The included angle between the inclined top dovetail groove and the central axis of the inclined top guide seat (19) is 2.6 degrees.
6. The internal core-pulling and demolding mechanism for the whole-circle annular internal buckling position according to claim 1, wherein one-time synchronous core pulling of the whole-circle annular internal buckling position is realized by utilizing a position difference generated in an internal core-pulling direction by an angle difference of two groups of inclined tops.
7. The internal core-pulling demoulding mechanism with the whole-circle annular internal buckling position according to claim 1, wherein the inclined top guide seat (19), namely the movable mould core, is fixed on the movable mould plate (5) through an internal hexagonal screw (20). The inclined top and the inclined top guide seat (19) are in sliding connection in a dovetail groove mode.
CN202010402111.0A 2020-05-13 2020-05-13 Internal core-pulling demoulding mechanism with whole-circle annular internal buckling position Pending CN111660512A (en)

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CN202010402111.0A CN111660512A (en) 2020-05-13 2020-05-13 Internal core-pulling demoulding mechanism with whole-circle annular internal buckling position

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112092311A (en) * 2020-09-23 2020-12-18 深圳市方品科技有限公司 Inner periphery circle back-off injection moulding demoulding structure
CN114274468A (en) * 2021-12-08 2022-04-05 厦门华盛弘精密模具有限公司 Mold device with petal type top swinging mechanism and production method thereof
CN115122596A (en) * 2022-08-30 2022-09-30 赫比(成都)精密塑胶制品有限公司 Die for processing whole-circle large-inner-reverse-buckled product and die opening method of die

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112092311A (en) * 2020-09-23 2020-12-18 深圳市方品科技有限公司 Inner periphery circle back-off injection moulding demoulding structure
CN114274468A (en) * 2021-12-08 2022-04-05 厦门华盛弘精密模具有限公司 Mold device with petal type top swinging mechanism and production method thereof
CN115122596A (en) * 2022-08-30 2022-09-30 赫比(成都)精密塑胶制品有限公司 Die for processing whole-circle large-inner-reverse-buckled product and die opening method of die
CN115122596B (en) * 2022-08-30 2022-12-20 赫比(成都)精密塑胶制品有限公司 Die for processing whole-circle large-inner-reverse-buckled product and die opening method of die

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