CN105643886B - Fervent post forming method in IMD moulds - Google Patents

Fervent post forming method in IMD moulds Download PDF

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Publication number
CN105643886B
CN105643886B CN201511022242.1A CN201511022242A CN105643886B CN 105643886 B CN105643886 B CN 105643886B CN 201511022242 A CN201511022242 A CN 201511022242A CN 105643886 B CN105643886 B CN 105643886B
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CN
China
Prior art keywords
imd
injection molding
mold
accommodating cavity
fervent
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Active
Application number
CN201511022242.1A
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Chinese (zh)
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CN105643886A (en
Inventor
钱旭
孙泽虎
郑芳
孔选
张九利
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NINGBO LAWRENCE AUTOMOTIVE INTERIORS Co.,Ltd.
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NINGBO HUAXIANG TRIM AUTOMOTIVE ORNAMENT Co Ltd
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Priority to CN201511022242.1A priority Critical patent/CN105643886B/en
Publication of CN105643886A publication Critical patent/CN105643886A/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/38Cutting-off equipment for sprues or ingates
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/76Measuring, controlling or regulating
    • B29C45/78Measuring, controlling or regulating of temperature
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2945/00Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76Measuring, controlling or regulating
    • B29C2945/76494Controlled parameter
    • B29C2945/76531Temperature

Abstract

Fervent post forming method in IMD moulds provided by the present invention, includes the following steps:The upper mold of mold and lower die are closed by Guan Mo;Mode locking locks upper mold and lower die, to form the accommodating cavity of molding IMD moulds;Injection molding, with injection molding machine by slurry by injection nozzle from the cast gate of accommodating cavity with rate V1Injection;Pressurize, with injection molding machine by slurry from the cast gate of mold accommodating cavity with rate V2Injection, and IMD part blanks are formed, go out to form injection molding stub bar in cast gate, wherein V2< V1;Earnestly, with the upward top pressure cast gate of thimble, injection nozzle is made to be detached from from injection molding stub bar, and compresses injection molding stub bar part and stretches in IMD parts blank and combine together with IMD part blanks;Cooling, it is IMD parts that IMD parts blank, which is cooled and shaped, in mold accommodating cavity;Upper mold and lower die are opened in die sinking, and are taken out from the IMD parts taken shape in mold accommodating cavity.The present invention improves the qualification rate of product, and production efficiency is high.

Description

Fervent post forming method in IMD moulds
Technical field
The invention belongs to IMD techniques, and in particular to fervent post forming method in a kind of IMD moulds.
Background technology
The Chinese of IMD:Decoration technique inside mold also known as exempts from application techniques.English name:In-Mold Decoration, IMD are international surface decoration technique in fashion, Surface hardened layer transparent membrane, intermediate printing pattern layer, back side note Layer is moulded, among ink, product rub resistance can be made, prevent surface from being scratched, and the distinctness of color can be kept to be not easy to fade for a long time.
Currently, it is existing using IMD techniques come the IMD parts of injection molding, one complete circulation technology generally wraps Die sinking is included, mode locking, injection molding, pressurize, cooling, molds, cut material.Wherein, the process for cutting material is specifically by the way of manually trimming Will because in injection molding and pressurize process the molding injection molding stub bar of cast gate institute be removed.It is appreciated that can be led by the way of more than The bits of the material after trimming are caused to be retained in the runner of mold, in this way when carrying out next cycle, the material left is considered to be worth doing can be with Rushed to the surface of IMD parts by the slurry that injection molding machine is molded, so as to cause IMD part two external films fall off and concavo-convex trace Mark, and then substandard products are formed, and reduce the qualification rate of product;It is appreciated that trimming injection molding by the way of manually trimming Material head is easy to cause to scratch to IMD parts during trimming, and its low production efficiency.
Invention content
Fervent post forming method in the IMD moulds that the object of the present invention is to provide a kind of for solving above-mentioned technical problem.
Fervent post forming method in a kind of IMD moulds, includes the following steps:
(1) upper mold of mold and lower die are closed by Guan Mo;
(2) mode locking locks upper mold and lower die, to form the accommodating cavity of molding IMD moulds;
(3) be molded, with injection molding machine by slurry by injection nozzle from the cast gate of accommodating cavity with rate V1Injection, wherein injection nozzle It is arranged in mold;
(4) pressurize, with injection molding machine by slurry from the cast gate of accommodating cavity with rate V2Injection, and IMD is formed in accommodating cavity Part blank forms injection molding stub bar, wherein V at cast gate2< V1
(5) earnestly, with the injection molding stub bar at the upward top pressure cast gate of thimble, injection nozzle is made to be detached from from injection molding stub bar, and make note Plastic cap part stretches in IMD parts blank and combines together with IMD part blanks;
(6) cooling, IMD parts blank is cooled and shaped in accommodating cavity, obtains IMD parts;
(7) it molds, upper mold and lower die is opened, and IMD parts are taken out.
As the preferred embodiment of the present invention, thimble top pressure injection molding stub bar is used in step (5) is fervent, injection molding stub bar is made to stretch into Distance in the IMD parts blank is not more than the one third of the wall thickness of the IMD parts blank.
As the preferred embodiment of the present invention, with the time interval of step (4) pressurize signal in order to control, to step (5) heat Cut into row control.
As the preferred embodiment of the present invention, it is to the amount of the injected slurry of accommodating cavity with step (3), step (4) injection molding machine Signal is controlled, earnestly to control step (5).
As the preferred embodiment of the present invention, the temperature of slurry is 220 DEG C -300 DEG C in step (3) injection molding 30, and step (4) is protected The temperature of slurry is 180 DEG C -200 DEG C in pressure.
As the preferred embodiment of the present invention, cooling step (6) is specially by the way of natural cooling.
As the preferred embodiment of the present invention, with time interval signal in order to control, respectively to step (3) injection molding 30, step (4) Pressurize and step (6) cooling are controlled.
Due to the application of the above technical scheme, the present invention has following advantages compared with prior art:
Pressurize is still in hot melt state by fervent post forming method in the IMD moulds of the present invention later in a manner of fervent When injection molding stub bar be compressed in IMD parts blank and combine together with IMD part blanks.This method avoid it is existing will be cold But the IMD parts after lead to the quality for expecting that bits are retained in the runner of mold and influence product after carrying out artificial trimming injection molding stub bar, To fundamentally solve the technical issues of caused after generation material is considered to be worth doing, the qualification rate of product is improved;Meanwhile it eliminating and repairing Injection molding stub bar this process is cut, the workload of staff has not only been saved, but also reduces the circulating cycle of IMD parts production Phase, and then improve the production efficiency of enterprise.
Description of the drawings
Fig. 1 is the flow diagram of fervent post forming method in IMD moulds provided by the present invention.
Specific implementation mode
In order to make the objectives, technical solutions and advantages of the present invention clearer, With reference to embodiment and join According to attached drawing, the present invention is described in more detail.It should be understood that these descriptions are merely illustrative, and it is not intended to limit this hair Bright range.In addition, in the following description, descriptions of well-known structures and technologies are omitted, to avoid this is unnecessarily obscured The concept of invention.
Referring to Fig. 1, fervent post forming method in IMD moulds provided by the present invention, is used to produce the one of IMD parts A complete cycle period includes the following steps successively:Close mould 10, mode locking 20, injection molding 30, pressurize 40, fervent 50, cooling 60 and Die sinking 70.
Wherein, step (1) Guan Mo 10 is the upper mold and closure for the mold that will be used to be molded IMD parts, step (2) mode locking 20 It is to lock upper mold and lower die, to form the accommodating cavity of molding IMD parts;Then slurry is passed through by injection molding using injection molding machine Mouth is from the cast gate of the mold accommodating cavity with rate V1Injection, wherein the injection nozzle is arranged in mold, wait one timing of injection molding Between after section, then reduce the injecting rate of injection molding machine, and with rate V2Moulded pulp, correspondingly, V are carried out in the accommodating cavity of mold2 < V1.The injecting rate V of the present embodiment slurry in specifically carrying out step (3) 30 processes of injection molding1It is far longer than step (4) guarantor Press the injecting rate V of slurry in 40 processes2, and step (3) is molded injection molding machine in 30 processes and is molded in mold accommodating cavity Slurry temperature and injection molding machine is molded in mold accommodating cavity in 40 process of step (4) pressurize slurry temperature not phase Together, in the present embodiment, the temperature of slurry is 220 DEG C -300 DEG C in step (3) injection molding 30, and slurry in step (4) pressurize 40 Temperature be 180 DEG C -200 DEG C.
After 40 process of above-mentioned steps (4) pressurize, gradually formation IMD parts are young for slurry in mold accommodating cavity Shape, and at the cast gate of mold accommodating cavity also can injection molding material head, that is, mold after 40 process of step (4) pressurize is accommodating The IMD parts blank of intracavitary is still in the state of heat fusing.Then the injection molding stub bar at the upward top pressure cast gate of thimble is driven, In, thimble can carry out injection molding stub bar flattening processing during upward top pressure injection molding stub bar, and the injection molding stub bar flattened is first Injection nozzle can be first detached from from the injection molding stub bar, then thimble continues up top pressure injection molding stub bar so that injection molding stub bar part It stretches in IMD part blanks, it will be understood that be in the IMD part blanks of hot melt state, which stretches to IMD The part of part blank can combine together with IMD part blanks.In the present embodiment, with thimble top pressure injection molding stub bar, make injection molding Material head part stretches to the one third that the distance in IMD part blanks is not more than IMD part blank wall thickness, to prevent injection molding stub bar It heads into IMD part blanks and is punctured from IMD part blanks, to ensure the qualification rate of product.It is appreciated that the injection molding Material head combines together with IMD part blanks, can be as the one of IMD parts after cooling 60 processes of follow-up step (6) Part.The process trimmed to the IMD parts of cooled aftershaping is thus eliminated, correspondingly, is also avoided because of trimming The quality for causing material to consider the runner for being retained in mold to be worth doing after injection molding stub bar and influencing product.It is appreciated that the thimble of the present embodiment can It is prepared by common stainless steel material, is specifically the action of upward top pressure injection molding stub bar and reset in assembling die Oil pressure control may be used to be accurately controlled.
It is appreciated that fervent 50 this process of above-mentioned steps (5) needs to carry out under hot melt state, having in this way During body use, need to immediately enter fervent 50 process of step (5) after step (4) 40 process of pressurize.Specifically may be used To house institute's moulded pulp to mold according to the time interval of step (4) pressurize 40 signal in order to control, or according to injection molding machine Amount signal in order to control, to control step (5) fervent 50, specifically, after detecting above-mentioned signal, driving top The upward top pressure injection molding stub bar of needle, and the process for entering step (5) fervent 50.
The process that step (6) cooling 60 is put into after above-mentioned fervent 50 process of step (5), so that mold accommodating cavity It is IMD parts that interior IMD parts blank, which is cooled and shaped, and in the present embodiment, step (6) cooling 60 is the mode of natural cooling.So Step (7) is carried out to the mold afterwards and molds 70, that is, opens upper mold and lower die, and the IMD parts out of this mold accommodating cavity take Go out, and then complete a cycle period of fervent post forming method in the IMD moulds, it will be understood that in step (7) die sinking 70 It will be taken out in molding IMD component dies, it specifically can be by the way that the top-pressure mechanism in the mold be arranged, by molding IMD zero Part eject and realize.
As the preferred embodiment of the present invention, in the IMD moulds that the present embodiment is provided earnestly the injection molding in post forming method, Pressurize and cooling process are specifically with time interval signal in order to control, to be respectively controlled.
In conclusion pressurize, is still in by fervent post forming method in the IMD moulds of the present invention later in a manner of fervent Injection molding stub bar when hot melt state is compressed in IMD parts blank and combines together with IMD part blanks.This method avoid existing Some causes material bits to be retained in the runner of mold and influences product after IMD parts after cooling are carried out artificial trimming injection molding stub bar Quality, to fundamentally solve generation material bits after it is caused the technical issues of, improve the qualification rate of product;Meanwhile Trimming injection molding stub bar this process is eliminated, the workload of staff has not only been saved, but also reduces the production of IMD parts Cycle period, and then improve the production efficiency of enterprise.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to restrict the invention, all essences in the present invention With within principle, any modification, equivalent substitution, improvement and etc. done should all be included within the scope of protection of the invention god.

Claims (6)

1. fervent post forming method in a kind of IMD moulds, it is characterised in that:Include the following steps:
(1) upper mold of mold and lower die are closed by Guan Mo;
(2) mode locking locks upper mold and lower die, to form the accommodating cavity of molding IMD moulds;
(3) be molded, with injection molding machine by slurry by injection nozzle from the cast gate of accommodating cavity with rate V1Injection, wherein injection nozzle are arranged In mold;
(4) pressurize, with injection molding machine by slurry from the cast gate of accommodating cavity with rate V2Injection, and IMD part young birds are formed in accommodating cavity Shape forms injection molding stub bar, wherein V at cast gate2< V1
(5) earnestly, with the injection molding stub bar at the upward top pressure cast gate of thimble, injection nozzle is made to be detached from from injection molding stub bar, and make injection molding material Head point stretches in IMD parts blank and combines together with IMD part blanks, and wherein injection molding stub bar stretches to the IMD zero Distance in part blank is not more than the one third of the wall thickness of the IMD parts blank;
(6) cooling, IMD parts blank is cooled and shaped in accommodating cavity, obtains IMD parts;
(7) it molds, upper mold and lower die is opened, and IMD parts are taken out.
2. fervent post forming method in IMD moulds according to claim 1, it is characterised in that:With step (4) pressurize when Between be spaced signal in order to control, earnestly to control step (5).
3. fervent post forming method in IMD moulds according to claim 1, it is characterised in that:With step (3), step (4) Amount signal in order to control from injection molding machine to the injected slurry of accommodating cavity, earnestly to control step (5).
4. fervent post forming method in IMD moulds according to claim 1, it is characterised in that:It is starched in step (3) injection molding 30 The temperature of material is 220 DEG C -300 DEG C, and the temperature of slurry is 180 DEG C -200 DEG C in step (4) pressurize.
5. fervent post forming method in IMD moulds according to claim 1, it is characterised in that:Step (6) cooling is specially By the way of natural cooling.
6. fervent post forming method in IMD moulds according to claim 1, it is characterised in that:In order to control with time interval Signal respectively controls step (3) injection molding 30, step (4) pressurize and step (6) cooling.
CN201511022242.1A 2015-12-30 2015-12-30 Fervent post forming method in IMD moulds Active CN105643886B (en)

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CN201511022242.1A CN105643886B (en) 2015-12-30 2015-12-30 Fervent post forming method in IMD moulds

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Application Number Priority Date Filing Date Title
CN201511022242.1A CN105643886B (en) 2015-12-30 2015-12-30 Fervent post forming method in IMD moulds

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CN105643886B true CN105643886B (en) 2018-08-07

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104175504A (en) * 2014-08-06 2014-12-03 嘉兴信元精密模具科技有限公司 In-mould cutting auxiliary mechanism

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104175504A (en) * 2014-08-06 2014-12-03 嘉兴信元精密模具科技有限公司 In-mould cutting auxiliary mechanism

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Effective date of registration: 20210922

Address after: 315700 Xizhou Town Industrial Zone, Xiangshan County, Ningbo City, Zhejiang Province

Patentee after: NINGBO LAWRENCE AUTOMOTIVE INTERIORS Co.,Ltd.

Address before: 315722 Industrial Development Zone, Xizhou Town, Xiangshan County, Ningbo City, Zhejiang Province

Patentee before: NBHX TRIM CHINA Co.,Ltd.

TR01 Transfer of patent right