CN109130062A - A kind of improved washing machine cover board injection molding process - Google Patents

A kind of improved washing machine cover board injection molding process Download PDF

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Publication number
CN109130062A
CN109130062A CN201810846406.XA CN201810846406A CN109130062A CN 109130062 A CN109130062 A CN 109130062A CN 201810846406 A CN201810846406 A CN 201810846406A CN 109130062 A CN109130062 A CN 109130062A
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CN
China
Prior art keywords
raw material
injection
pressure
washing machine
mold
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810846406.XA
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Chinese (zh)
Inventor
张志林
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.)
SHANGHAI PUDONG MEILING PLASTIC PRODUCTS CO LTD
Original Assignee
SHANGHAI PUDONG MEILING PLASTIC PRODUCTS CO LTD
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHANGHAI PUDONG MEILING PLASTIC PRODUCTS CO LTD filed Critical SHANGHAI PUDONG MEILING PLASTIC PRODUCTS CO LTD
Priority to CN201810846406.XA priority Critical patent/CN109130062A/en
Publication of CN109130062A publication Critical patent/CN109130062A/en
Pending legal-status Critical Current

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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
    • 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
    • B29C45/77Measuring, controlling or regulating of velocity or pressure of moulding material
    • 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
    • B29C2945/76498Pressure
    • 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
    • B29C2945/76655Location of control
    • B29C2945/76658Injection unit
    • 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
    • B29C2945/76822Phase or stage of control
    • B29C2945/76859Injection
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/762Household appliances

Abstract

The invention discloses a kind of improved washing machine cover board injection molding process, including the technique to be implemented using corresponding adapted to injection system and injection mold, and the technique includes the following steps: that (1) raw material mixes;(2) it stirs;(3) pretreatment of raw material;(4) equipment pre-processes;(5) raw material is plasticized;(6) it molds;(7) raw material is injected;(8) pressure maintaining;(9) it is cooled and shaped;(10) it is opened;(11) molded housing is taken out;(12) clear mould;(13) it examines;(14) warehousing finished products;(15) it is crushed;(16) it screens.Cooling time of the invention is short and uniform, and process implementing step is simple, effectively reduces period and the production cost of product injection molding, while by corresponding process conditions, effectively raising the final product quality of product, being good for the environment.

Description

A kind of improved washing machine cover board injection molding process
Technical field
The present invention relates to injection molding technology fields, are related specifically to a kind of improved washing machine cover board injection molding work Skill.
Background technique
Injection molding is a kind of method of industrial products production moulding.Product is usually using rubber injection mold and plastic injection.Injection molding Molding die platen press and casting die can also be dispensed.Injection (mo(u)lding) machine (abbreviation injector or injection molding machine) is by thermoplastic or heat The main molding equipment of plastic products of various shapes is made using mould for plastics for solidity material, and injection moulding is to pass through injection molding Machine and mold are realized.
To meet consumer for the aesthetic requirement of cover plate for washing machine appearance, and also to more environmentally-friendly, using exempting to spray Applying high-surface gloss traceless injection molding technology production cover plate for washing machine has become mainstream.The generation and development of the technology be unable to do without plastics It is multiple to cover glazed plastic material, high-gloss injection mold, mould temperature temperature control device etc. for the continuous development and innovation of forming technique Aspect.
In recent years, people have been no longer satisfied with the use function of air-conditioning, sample to the appreciation of its appearance and environmentally protective It is required that higher and higher.Since traditional injection moulding process is first to be molded cover plate for washing machine, the method then sprayed again, both not environmentally, Quality is also unstable, and out-of-date methods have been abandoned one after another by numerous international and domestic well-known manufacturers, then use a kind of novel forming work Skill --- spraying-free high-surface gloss traceless injection molding technology.Cover plate for washing machine surface gloss can be made high for the technology and weldless line, The defects of current mark and shrink mark, and it is not necessarily to subsequent spraying process, to be reduced to environmental protection and cost extremely advantageous.Due to exempting to spray The implementation for applying bloom injection molding technology be unable to do without glazed plastic material, high-gloss injection mold, mould temperature temperature control device and injection molding machine With the tight fit of Shooting Technique.
But there is also certain defects in implementation process for the existing technique for being molded cover plate for washing machine, it is such as cooling Time is longer, needs to account for the 70-80% of entire molding cycle, and inhomogeneous cooling is even, easily occurs the product of injection molding The defects of buckling deformation, processing step is complicated, molding cycle is long and at high cost, while the final product quality of prior art is not high, It is difficult to meet the production requirement of people.
However in view of the deficiencies of the prior art, a kind of design is reasonable, structure is simple, cooling time it is necessary to develop by developer Short and uniform, process implementing step is simple, effectively reduces period and the production cost of product injection molding, passes through simultaneously Corresponding process conditions, effectively raise the final product quality of product, and environmentally friendly improved washing machine cover board is molded into Type technique.
Summary of the invention
In order to solve the problems existing in the prior art, the object of the invention provide a kind of design rationally, structure it is simple, cooling when Between it is short and uniform, process implementing step is simple, effectively reduce period and the production cost of product injection molding, simultaneously lead to Corresponding process conditions are crossed, the final product quality of product, environmentally friendly improved washing machine cover board injection molding are effectively raised Moulding process.
In order to solve the above technical problems, the present invention is realized using following technical scheme:
A kind of improved washing machine cover board injection molding process, including the technique use corresponding adapted to injection system and injection mould Tool is to implement, it is characterised in that;
The technique includes the following steps:
(1) raw material mixes: broken raw material is mixed with the raw material for being used to be molded cover plate for washing machine;
(2) it stirs: mixed raw material being stirred by agitating device;
(3) pretreatment of raw material: the drying of 3 hours is carried out to raw material using baking oven, and raw material is heated to 90-100 DEG C;
(4) equipment pre-processes: the barrel in adapted to injection system being heated to 210-285 DEG C, barrel heating is divided into three sections, back segment It is heated to 210-240 DEG C, for Mid-section heating to 230-280 DEG C, leading portion is heated to 240-285 DEG C, and the cover half in injection mold is added Heat arrives 70-80 DEG C, and dynamic model is heated to 50-60 DEG C;
(5) raw material is plasticized: the raw material that step (3) has pre-processed being added in the barrel of step (4) processing, is heated to melt Melt state;
(6) it molds: the mold after heating is molded;
(7) raw material is injected: by the raw material by the molten condition of step (4) by nozzle injection to the mold by (5) In, injection pressure 80-130kg/cm2, and injection process is divided into 5 stages:
First stage injection pressure is 110kg/cm2
Second stage injection pressure is 130kg/cm2
Phase III injection pressure is 110kg/cm2
Fourth stage injection pressure is 100kg/cm2
5th stage injection pressure is 80kg/cm2
(8) pressure maintaining: by injecting uniformly carry out pressure maintaining, dwell time 4-7s, and pressure maintaining period is divided into three phases, the The pressure of one stage pressure maintaining is 65kg/cm2, dwell time 1.5s;The pressure of second stage pressure maintaining is 75kg/cm2, when pressure maintaining Between be 2s, the pressure of phase III pressure maintaining is 90kg/cm2, dwell time 3.5s;
(9) be cooled and shaped: the cooling and shaping time is 15-25s;
(10) it is opened: being opened while hot;
(11) take out molded housing: operator carries proximity gloves and removes shell after molding from mold;
(12) clear mould: operator clears up the mold by step (11), and it is dynamic that step (6) are carried out after the completion of cleaning Make, prepares for the injection molding of next shell;
(13) it examines: the molded housing in step (11) is tested;
(14) it warehousing finished products: is put in storage by the qualified products that step (13) are examined;
(15) it is crushed: break process is carried out by crusher by the substandard product that step (13) are examined;
(16) it screens: screening plant being selected to screen to by the crushed particles after step (15), it will be satisfactory Crushed particles carry out mixing the operation for carrying out step (1) with the raw material for being molded cover plate for washing machine.
In a preferred embodiment of the invention, sieve diameter used in screening plant is in the step (16) 0.45-0.55cm。
Compared with prior art, the invention has the following advantages that cooling time is short and uniform, process implementing step is simple, Period and the production cost of product injection molding are effectively reduced, while by corresponding process conditions, it is effective to improve The final product quality of product, high degree of automation improve the aesthetics of surface of plastic products, are good for the environment.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with It obtains other drawings based on these drawings.
Fig. 1 is flow chart of the invention.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below Conjunction is specifically illustrating, and the present invention is further explained.
Shown in referring to Fig.1, a kind of improved washing machine cover board injection molding process provided in figure, including the technique are used Corresponding adapted to injection system and injection mold are implemented, and injection mold is mainly made of dynamic model and cover half.
Specific step is as follows for its technique:
(1) raw material mixing 100
Broken raw material is mixed with the raw material for being used to be molded cover plate for washing machine.
(2) 200 are stirred
Mixed raw material is stirred by agitating device, after stirring by agitating device, raw material can be made to mix It is more uniform.
(3) pretreatment of raw material 300
The drying of 3 hours is carried out to raw material using baking oven, and raw material is heated to 90-100 DEG C.
(4) equipment pretreatment 400
Barrel in adapted to injection system is heated to 210-285 DEG C, barrel heating is divided into three sections, and back segment is heated to 210-240 DEG C, for Mid-section heating to 230-280 DEG C, leading portion is heated to 240-285 DEG C, and the cover half in injection mold is heated to 70-80 DEG C, moves Mould is heated to 50-60 DEG C.
(5) raw material plasticizing 500
The raw material that step (3) has pre-processed is added in the barrel of step (4) processing, is heated to molten condition.
(6) 600 are molded
Mold after heating is molded.
(7) raw material injection 700
By the raw material by the molten condition of step (4) through nozzle injection in by the mold of (5), injection pressure is 80-130kg/cm2, and injection process is divided into 5 stages:
First stage injection pressure is 110kg/cm2
Second stage injection pressure is 130kg/cm2
Phase III injection pressure is 110kg/cm2
Fourth stage injection pressure is 100kg/cm2
5th stage injection pressure is 80kg/cm2
(8) pressure maintaining 800
It is divided into three phases by injecting uniformly carry out pressure maintaining, dwell time 4-7s, and pressure maintaining period, the first stage protects The pressure of pressure is 65kg/cm2, dwell time 1.5s;The pressure of second stage pressure maintaining is 75kg/cm2, dwell time 2s, the The pressure of three stages pressure maintaining is 90kg/cm2, dwell time 3.5s.
(9) 900 are cooled and shaped
The cooling and shaping time is 15-25s.
(10) 1000 are opened
It is opened while hot.
(11) molded housing 1100 is taken out
Operator carries proximity gloves and removes shell after molding from mold.
(12) clear mould 1200
Operator clears up the mold by step (11), and step (6) movement is carried out after the completion of cleaning, is next A shell injection molding is prepared.
(13) 1300 are examined
Molded housing in step (11) is tested, examine molded housing whether have lack material, fragmentation, expect spend, reprint books in a reduce format, The bad phenomenons such as scratch, impression of the hand, stain, mist, without being then qualification, it is then unqualified for having.
(14) warehousing finished products 1400
It is put in storage by the qualified products that step (13) are examined.
(15) 1500 are crushed
Break process is carried out by crusher by the substandard product that step (13) are examined, underproof product is crushed At graininess.
(16) 1600 are screened
Select screening plant to screen to by the crushed particles after step (15), by satisfactory crushed particles and Raw material for being molded cover plate for washing machine carries out the operation that mixing carries out step (1), and sieve diameter used in middle screening plant is 0.45-0.55cm。
Invention has the advantage that cooling time is short and uniform in summary, and process implementing step is simple, has The period for reducing product injection molding of effect and production cost, while by corresponding process conditions, it effectively raises The final product quality of product, high degree of automation improve the aesthetics of surface of plastic products, are good for the environment.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this The principle of invention, various changes and improvements may be made to the invention without departing from the spirit and scope of the present invention, these changes Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its Equivalent defines.

Claims (2)

1. a kind of improved washing machine cover board injection molding process, including the technique use corresponding adapted to injection system and injection mold To implement, it is characterised in that;
The technique includes the following steps:
(1) raw material mixes: broken raw material is mixed with the raw material for being used to be molded cover plate for washing machine;
(2) it stirs: mixed raw material being stirred by agitating device;
(3) pretreatment of raw material: the drying of 3 hours is carried out to raw material using baking oven, and raw material is heated to 90-100 DEG C;
(4) equipment pre-processes: the barrel in adapted to injection system being heated to 210-285 DEG C, barrel heating is divided into three sections, back segment heating To 210-240 DEG C, for Mid-section heating to 230-280 DEG C, leading portion is heated to 240-285 DEG C, and the cover half in injection mold is heated to 70-80 DEG C, dynamic model is heated to 50-60 DEG C;
(5) raw material is plasticized: the raw material that step (3) has pre-processed being added in the barrel of step (4) processing, is heated to molten State;
(6) it molds: the mold after heating is molded;
(7) raw material is injected: by the raw material by the molten condition of step (4) through nozzle injection in by the mold of (5), note Injection pressure is 80-130kg/cm2, and injection process is divided into 5 stages:
First stage injection pressure is 110kg/cm2
Second stage injection pressure is 130kg/cm2
Phase III injection pressure is 110kg/cm2
Fourth stage injection pressure is 100kg/cm2
5th stage injection pressure is 80kg/cm2
(8) pressure maintaining: it is divided into three phases, the first rank by injecting uniformly carry out pressure maintaining, dwell time 4-7s, and pressure maintaining period The pressure of section pressure maintaining is 65kg/cm2, dwell time 1.5s;The pressure of second stage pressure maintaining is 75kg/cm2, the dwell time is 2s, the pressure of phase III pressure maintaining are 90kg/cm2, dwell time 3.5s;
(9) be cooled and shaped: the cooling and shaping time is 15-25s;
(10) it is opened: being opened while hot;
(11) take out molded housing: operator carries proximity gloves and removes shell after molding from mold;
(12) clear mould: operator clears up the mold by step (11), and step (6) movement is carried out after the completion of cleaning, It prepares for the injection molding of next shell;
(13) it examines: the molded housing in step (11) is tested;
(14) it warehousing finished products: is put in storage by the qualified products that step (13) are examined;
(15) it is crushed: break process is carried out by crusher by the substandard product that step (13) are examined;
(16) it screens: screening plant being selected to screen to by the crushed particles after step (15), it will be satisfactory broken Particle carries out mixing the operation for carrying out step (1) with the raw material for being molded cover plate for washing machine.
2. a kind of improved washing machine cover board injection molding process as described in claim 1, it is characterised in that: the step (16) sieve diameter used in screening plant is 0.45-0.55cm in.
CN201810846406.XA 2018-07-27 2018-07-27 A kind of improved washing machine cover board injection molding process Pending CN109130062A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810846406.XA CN109130062A (en) 2018-07-27 2018-07-27 A kind of improved washing machine cover board injection molding process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810846406.XA CN109130062A (en) 2018-07-27 2018-07-27 A kind of improved washing machine cover board injection molding process

Publications (1)

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CN109130062A true CN109130062A (en) 2019-01-04

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110789060A (en) * 2019-11-12 2020-02-14 泉州市康电光电科技有限公司 Graphene superconductor and preparation process thereof
CN112706363A (en) * 2020-11-06 2021-04-27 英华利汽车零部件(赣州)有限公司 Injection molding process of green environment-friendly injection molding product

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CN112706363A (en) * 2020-11-06 2021-04-27 英华利汽车零部件(赣州)有限公司 Injection molding process of green environment-friendly injection molding product

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