CN102441968A - Injection molding method of plastic frame and forming die used in same - Google Patents

Injection molding method of plastic frame and forming die used in same Download PDF

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Publication number
CN102441968A
CN102441968A CN2011102627517A CN201110262751A CN102441968A CN 102441968 A CN102441968 A CN 102441968A CN 2011102627517 A CN2011102627517 A CN 2011102627517A CN 201110262751 A CN201110262751 A CN 201110262751A CN 102441968 A CN102441968 A CN 102441968A
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China
Prior art keywords
plastic frame
flow path
gate system
injection molding
running gate
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Pending
Application number
CN2011102627517A
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Chinese (zh)
Inventor
张明磊
王小新
王国琪
刘永存
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Qingdao Hisense Mould Co Ltd
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Qingdao Hisense Mould Co Ltd
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Publication date
Application filed by Qingdao Hisense Mould Co Ltd filed Critical Qingdao Hisense Mould Co Ltd
Priority to CN2011102627517A priority Critical patent/CN102441968A/en
Publication of CN102441968A publication Critical patent/CN102441968A/en
Pending legal-status Critical Current

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Abstract

The invention discloses an injection molding method of a plastic frame and a forming die used in the same. The injection molding method comprises an injection molding step, and is characterized in that in the injection molding step, molten plastics are injected into a die cavity through nozzles and a hot runner casting system by adopting a plastic injection molding machine, wherein, hot runner sprues in the hot runner casting system adopt a feeding mode on the end surfaces of the sides of the plastic frame. The forming die comprises a stationary die, a moving die, the die cavity and the casting system, and is characterized in that the hot runner casting system is arranged on the moving die, and the hot runner sprues are positioned on the die cavity to realize the feeding mode on the end surfaces of the sides of the plastic frame. The injection molding method has the beneficial effects that during the injection molding process of the plastic frame, no cold plastic scraps can be generated, thus saving raw materials, shortening the forming cycle, and improving the production efficiency; and meanwhile sprue marks are avoided on the front face of a plastic part product (the plastic frame), thus ensuring the appearance quality of the product.

Description

A kind of injection moulding process of plastic frame and mould
Technical field
The invention belongs to the field shaping technique of plastic frame product, especially relate to a kind of injection moulding process of plastic frame, and employed mould in a kind of above-mentioned plastic frame injection moulding process.
Background technology
Show the plastic frame of series products such as television set, display etc., generally have following characteristics:
(1) be made up of upper and lower, left and right four edges frame, the centre is empty.
(2) have vertical side on each frame.
(3) wall thickness of each frame is thinner, generally below 3mm.
(4) surface quality requires high.
In the prior art; In conjunction with Fig. 1, Fig. 2 and Fig. 3; The injection moulding process of above-mentioned plastic frame 1 and mould; General adopt positive assembling structure, the injection molding machine injects die cavity by the crotch cast gate 3 of nozzle through cold runner in the mould with molten plastic with molten plastic, and obtaining product after the moulding is plastic frame (product).Owing to using cold runner, there are a large amount of material handles, waste raw material and the energy.Because the running channel diameter generally much larger than the product wall thickness, therefore the cool time that will be longer than product cool time of material handle, causes the molding cycle of mould long, production efficiency is low in addition.
Therefore, the injection moulding process of above-mentioned plastic frame and mould also need further to improve.
Summary of the invention
Task of the present invention is to solve the injection moulding process and the existing technological deficiency of mould of plastic frame in the prior art, and a kind of injection moulding process of plastic frame is provided, and the employed a kind of mould of the injection moulding process of above-mentioned plastic frame.
Its technical solution is:
A kind of injection moulding process of plastic frame; Comprise injecting step; In injecting step; Adopt the injection molding machine that molten plastic is injected die cavity through nozzle and running gate system, above-mentioned running gate system adopts the hot flow path running gate system, and the heat flow passage sprue in the hot flow path running gate system is taked the feeding manner at the lateral end panel place of plastic frame.
The employed mould of a kind of injection moulding process of plastic frame; Comprise quiet mould, dynamic model, die cavity and running gate system; Above-mentioned running gate system is the hot flow path running gate system; Be arranged on the dynamic model, the heat flow passage sprue in the hot flow path running gate system is positioned at can be on the die cavity wall of the lateral end panel place charging of plastic frame.
Above-mentioned dynamic model is provided with dynamic mould core and inserts, and heat flow passage sprue is arranged on dynamic mould core inserts, and above-mentioned hot flow path stretches into dynamic mould core and inserts, and mouth and heat flow passage sprue through hot flow path join.
Above-mentioned dynamic model disposes ejection assembly, and ejection assembly is fixed on head board and releases on the fixed head, adopts two or more Driven by Hydraulic Cylinder; The cylinder part of hydraulic cylinder is fixed on the hot flow path fixed head, and the piston rod partial fixing is on head board, and perhaps the cylinder part of hydraulic cylinder is fixed on the head board, and the piston rod partial fixing is on the hot flow path fixed head.
The present invention has following useful technique effect:
The present invention can either realize not having the cold burden handle in the plastic frame injection molding process, shorten molding cycle, and conservation is enhanced productivity; Can avoid again guaranteeing the presentation quality of product in the positive gate vestiges that produces of plastic product (plastic frame).
Description of drawings
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is described further:
The running gate system schematic layout pattern that Fig. 1 takes for the injection moulding process of a kind of plastic frame in the prior art shows the anti-TV structure of side direction.
Fig. 2 is the structural representation of facing of Fig. 1 mode.
Fig. 3 shows structural representation for the partial cutaway of Fig. 1 mode.
The running gate system schematic layout pattern that Fig. 4 takes for the injection moulding process of a kind of plastic frame among the present invention.
Fig. 5 is the partial structurtes sketch map of Fig. 4 mode, mainly shows the placement location of heat flow passage sprue.
Fig. 6 is the structural principle sketch map of the employed mould of injection moulding process of a kind of plastic frame among the present invention.
Fig. 7 is the partial structurtes sketch map of Fig. 6 mode, mainly shows the placement location of heat flow passage sprue.
Fig. 8 is the partial structurtes sketch map of Fig. 6 mode, mainly shows ejection assembly driving oil cylinder scheme of installation.
The specific embodiment
In conjunction with Fig. 4 and Fig. 5, a kind of injection moulding process of plastic frame comprises injecting step.In injecting step; Adopt the injection molding machine that molten plastic is injected die cavity through nozzle and running gate system; Above-mentioned running gate system adopts the hot flow path running gate system; Comprise hot flow path, heat flow passage sprue, hot flow path joins with heat flow passage sprue 3 through the mouth 2 of hot flow path, and heat flow passage sprue is taked the feeding manner at the lateral end panel place of plastic frame 1.The quantity of cast gate and position are provided with according to the formed product needs; As a kind of layout type; Present embodiment adopts four heat flow passage sprues, a frame in four frames of the corresponding plastic frame 1 of difference, and each heat flow passage sprue is taked the feeding manner at the lateral end panel central part place of corresponding frame.
Relevant forming step of other that do not address in the above-mentioned injection moulding process and content are taked or are used for reference prior art and can realize.
In conjunction with Fig. 6, Fig. 7 and Fig. 8, the employed mould of a kind of injection moulding process of plastic frame comprises quiet mould, dynamic model, die cavity and running gate system.Above-mentioned running gate system is the hot flow path running gate system, is arranged on the dynamic model, and the hot flow path running gate system comprises hot flow path 4 and heat flow passage sprue 3, and heat flow passage sprue 3 is positioned at can be on the die cavity wall of the lateral end panel place charging of plastic frame.As a kind of layout type, present embodiment adopts four heat flow passage sprues, and a frame in four frames of corresponding plastic frame respectively, each heat flow passage sprue lay respectively at can be on the die cavity wall of lateral end panel central part place's charging of corresponding frame.Above-mentioned dynamic model is provided with dynamic mould core and inserts 5, and heat flow passage sprue is arranged on dynamic mould core and inserts on 5, and above-mentioned hot flow path stretches into dynamic mould core and inserts, and mouth 2 and heat flow passage sprue through hot flow path join.Above-mentioned dynamic model also comprises moving platen 6, cushion block 7, hot flow path fixed head 8, hot flow path backing plate 9, Bottom clamp plate 10, head board 11, releases fixed head 12, centring ring 13; Wherein hot flow path passes moving platen, head board and releases fixed head; The entering dynamic mould core is inserted, and is fixed on the dynamic model through hot flow path fixed head, hot flow path backing plate and Bottom clamp plate.Above-mentioned quiet mould comprises quiet template 14, quiet die holder plate 15, cavity block 16.Above-mentioned cavity block and dynamic mould core are inserted and are formed the injection mo(u)lding that die cavity is used for plastic frame.
Above-mentioned dynamic model disposes ejection assembly; The ejection assembly drive unit adopts two hydraulic cylinders 17; The cylinder part of each hydraulic cylinder is fixed on the hot flow path running gate system fixed head; The piston rod partial fixing is being with the ejection assembly motion by two hydraulic cylinder synchronous driving head boards 11, release fixed heads 12 on head board 11.During die sinking, dynamic model separates with quiet mould, is driven head boards, is released fixedly strip and ejection assembly and move by two hydraulic cylinder synchronous, ejects plastic, and product is separated with the core of dynamic model.
The related content of not addressing in the above-mentioned mould embodiment is taked or is used for reference prior art and can realize.
The inventor is in the process of developing the invention; Do and appear following trial, that is: heat flow passage sprue is taked the feeding manner at the back side of plastic frame, owing to show that the plastic frame wall thickness of series products is all very thin; Very easily produce gate vestiges in the product front, influence the product appearance quality.The effect that obtains with the invention differs greatly.
Need to prove that those skilled in the art can also make such or such easy variation pattern under the instruction of this specification, such as equivalent way, or obvious mode of texturing.Above-mentioned variation pattern all should be within protection scope of the present invention.

Claims (4)

1. the injection moulding process of a plastic frame; Comprise injecting step; It is characterized in that: in injecting step; Adopt the injection molding machine that molten plastic is injected die cavity through nozzle and running gate system, above-mentioned running gate system adopts the hot flow path running gate system, and the heat flow passage sprue in the hot flow path running gate system is taked the feeding manner at the lateral end panel place of plastic frame.
2. employed mould of the injection moulding process by the said plastic frame of claim 1; Comprise quiet mould, dynamic model, die cavity and running gate system; It is characterized in that: said running gate system is the hot flow path running gate system; Be arranged on the dynamic model, the heat flow passage sprue in the hot flow path running gate system is positioned at can be on the die cavity of the lateral end panel place charging of plastic frame.
3. mould according to claim 2; It is characterized in that: said dynamic model is provided with dynamic mould core and inserts; Heat flow passage sprue is arranged on dynamic mould core inserts, and said hot flow path stretches into dynamic mould core and inserts, and mouth and heat flow passage sprue through hot flow path join.
4. mould according to claim 2 is characterized in that: said dynamic model disposes ejection assembly, and ejection assembly is fixed on head board and releases on the fixed head, adopts two or more Driven by Hydraulic Cylinder; The cylinder part of hydraulic cylinder is fixed on the hot flow path fixed head, and the piston rod partial fixing is on head board, and perhaps the cylinder part of hydraulic cylinder is fixed on the head board, and the piston rod partial fixing is on the hot flow path fixed head.
CN2011102627517A 2011-09-06 2011-09-06 Injection molding method of plastic frame and forming die used in same Pending CN102441968A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011102627517A CN102441968A (en) 2011-09-06 2011-09-06 Injection molding method of plastic frame and forming die used in same

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Application Number Priority Date Filing Date Title
CN2011102627517A CN102441968A (en) 2011-09-06 2011-09-06 Injection molding method of plastic frame and forming die used in same

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CN102441968A true CN102441968A (en) 2012-05-09

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102886881A (en) * 2012-11-07 2013-01-23 四川长虹模塑科技有限公司 Gradient control method of rectangular framework injection products
CN102962956A (en) * 2012-11-29 2013-03-13 深圳创维-Rgb电子有限公司 Injection mold
CN103612360A (en) * 2013-11-19 2014-03-05 四川航天工业集团有限公司 Method for molding automobile fender with material thickness of 1.5mm
CN104690906A (en) * 2015-04-02 2015-06-10 韩立艳 Injection mold cold runner casting system structure
EP3037240A1 (en) * 2014-12-23 2016-06-29 ABB Technology AG Injection mold for the production of a family of products

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000280297A (en) * 1999-03-31 2000-10-10 Mitsubishi Materials Corp Hot runner type mold device
CN201579952U (en) * 2010-01-27 2010-09-15 常熟得宝精工有限公司 Plastic frame injection mould of LCD
CN201900707U (en) * 2010-11-22 2011-07-20 天津凡进模具有限公司 Combined mold for front frames of televisions or displays
CN202192735U (en) * 2011-09-06 2012-04-18 青岛海信模具有限公司 Forming die for plastic frame injection moulding

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000280297A (en) * 1999-03-31 2000-10-10 Mitsubishi Materials Corp Hot runner type mold device
CN201579952U (en) * 2010-01-27 2010-09-15 常熟得宝精工有限公司 Plastic frame injection mould of LCD
CN201900707U (en) * 2010-11-22 2011-07-20 天津凡进模具有限公司 Combined mold for front frames of televisions or displays
CN202192735U (en) * 2011-09-06 2012-04-18 青岛海信模具有限公司 Forming die for plastic frame injection moulding

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102886881A (en) * 2012-11-07 2013-01-23 四川长虹模塑科技有限公司 Gradient control method of rectangular framework injection products
CN102962956A (en) * 2012-11-29 2013-03-13 深圳创维-Rgb电子有限公司 Injection mold
CN102962956B (en) * 2012-11-29 2015-04-15 深圳创维-Rgb电子有限公司 Injection mold
CN103612360A (en) * 2013-11-19 2014-03-05 四川航天工业集团有限公司 Method for molding automobile fender with material thickness of 1.5mm
EP3037240A1 (en) * 2014-12-23 2016-06-29 ABB Technology AG Injection mold for the production of a family of products
CN104690906A (en) * 2015-04-02 2015-06-10 韩立艳 Injection mold cold runner casting system structure

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Application publication date: 20120509