CN109228010A - A kind of injection moulding process and its product of casing of liquid crystal television set - Google Patents
A kind of injection moulding process and its product of casing of liquid crystal television set Download PDFInfo
- Publication number
- CN109228010A CN109228010A CN201811192620.4A CN201811192620A CN109228010A CN 109228010 A CN109228010 A CN 109228010A CN 201811192620 A CN201811192620 A CN 201811192620A CN 109228010 A CN109228010 A CN 109228010A
- Authority
- CN
- China
- Prior art keywords
- regrown material
- backboard
- radiating part
- liquid crystal
- casing
- 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.)
- Granted
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 34
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 101
- 230000017525 heat dissipation Effects 0.000 claims abstract description 50
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000002347 injection Methods 0.000 claims description 48
- 239000007924 injection Substances 0.000 claims description 48
- 239000002245 particle Substances 0.000 claims description 22
- 239000000428 dust Substances 0.000 claims description 18
- 238000001035 drying Methods 0.000 claims description 15
- 230000002787 reinforcement Effects 0.000 claims description 15
- 238000004140 cleaning Methods 0.000 claims description 12
- 230000003014 reinforcing effect Effects 0.000 claims description 10
- 239000000243 solution Substances 0.000 claims description 7
- 238000005452 bending Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 6
- 238000007731 hot pressing Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 230000004927 fusion Effects 0.000 claims description 3
- 239000008187 granular material Substances 0.000 claims description 3
- 238000007654 immersion Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 239000002736 nonionic surfactant Substances 0.000 claims description 3
- 230000008929 regeneration Effects 0.000 claims description 3
- 238000011069 regeneration method Methods 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims 1
- 239000003292 glue Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000004064 recycling Methods 0.000 abstract description 8
- 230000015556 catabolic process Effects 0.000 abstract description 7
- 238000006731 degradation reaction Methods 0.000 abstract description 7
- 239000002699 waste material Substances 0.000 abstract description 6
- 238000003912 environmental pollution Methods 0.000 abstract description 5
- 238000000465 moulding Methods 0.000 abstract description 3
- 238000005457 optimization Methods 0.000 abstract description 2
- 239000004743 Polypropylene Substances 0.000 description 55
- 229920005669 high impact polystyrene Polymers 0.000 description 10
- 239000004797 high-impact polystyrene Substances 0.000 description 10
- 230000006872 improvement Effects 0.000 description 8
- 239000004793 Polystyrene Substances 0.000 description 7
- 230000007547 defect Effects 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 230000002708 enhancing effect Effects 0.000 description 3
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 3
- 229910052753 mercury Inorganic materials 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical class N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/06—Conditioning or physical treatment of the material to be shaped by drying
- B29B13/065—Conditioning or physical treatment of the material to be shaped by drying of powder or pellets
-
- 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
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2737—Heating or cooling means 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
- B29C45/76—Measuring, controlling or regulating
- B29C45/78—Measuring, controlling or regulating of temperature
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/64—Constructional details of receivers, e.g. cabinets or dust covers
-
- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76531—Temperature
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Liquid Crystal (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a kind of injection moulding process of casing of liquid crystal television set, it uses PP regrown material to be made, it is the following steps are included: (1) PP regrown material prepares, (2) PP regrown material cleans, (3) PP regrown material is molded, the molding of (4) PP regrown material.Waste PP regrown material is carried out injection molding by the present invention, and work efficiency is high, low manufacture cost, and to resource-conserving and environment-friendly society is established, developing a circular economy has the function of positive and important meaning；Also disclose casing of liquid crystal television set made from a kind of implementation this method, it is substituted by structure optimization and material, solve the problems, such as that the recycling of useless backboard and discarded surface frame in waste and old television set is difficult, while its fast degradation performance slows down the consumption to Resources, mitigate environmental pollution, and the radiator structure by improving backboard, while realizing high heat dissipation, the intensity of backboard is strengthened, it is practical.
Description
Technical field
The present invention relates to a kind of television enclosure injection molding technology field more particularly to a kind of injection moulding process of casing of liquid crystal television set
And its product.
Background technique
With the raising of the economic rapid development and income level of resident in China, LCD TV comes into thousand ten thousand
Family, this is but also China becomes colour TV big country truly.Color TV trade is also that the pillar of China's electronics industry produces at present
Industry, market prospects are very good.With the development in market, various large scales (40 inches or more), oversize (65 to 75 English
It is very little) and greatly size (100 inches or more) model television set, increasingly by the welcome of consumer.
Currently, the development of LCD TV have been relatively mature, about the configuration aspects of LCD TV, industry is interior for liquid crystal
The main support structure of TV is substantially the backboard being made by HIPS material as light emitting source and screen main support, PS+ glass
Support and external aesthetical design of the surface frame that material is made into as screen.However use HIPS material and PS+ glass fiber material both
Backboard and surface frame made of material are still haveed the defects that great, and HIP material and PS material contain lead, mercury, brominated flame retardant
It etc. many harmful substances, therefore, must be dealt carefully with after scrapping, larger harm otherwise will be caused to environment；It uses at the same time
The recycling of useless backboard and discarded surface frame in waste and old television set made of HIPS material and PS+ glass fiber material both materials is extremely
It is difficult, it is difficult to which that fast degradation increases environmental pressure and the wasting of resources.And polypropylene material, i.e. PP regrown material, not only polypropylene
With good heat resistance, mechanical property and chemical property, and it is cheap, also there is excellent degradation property, it is very suitable
Manufacture for large-size liquid crystal television shell produces.
PP regeneration particle propylene is that the polymer crystallinity of nontoxic, odorless, tasteless creamy white crystals is high, compound with regular structure,
Thus there is excellent mechanical property, surrender, draw stretch, compressive strength and hardness, elasticity etc. are all than HDPE high.Its fusing point is
164~170 degree, product can carry out sterilization in 100 degree or more of temperature, and polyacrylic chemical stability is fine, and removing can be by dense nitre
It is all more stable to other various chemical reagent outside acid attack.Common processing method are as follows: injection molding, extrusion molding, hollow molding, rotation
Change into type.But the material is when forming the moulding of large scale, labyrinth, thin-wall product, there is also problems,
It is easy to cause product surface defect, air entrapment, cracking and other issues occur.
At the same time, there is also shortcoming in terms of heat dissipation, those skilled in the art know existing LCD TV,
LCD TV is generally made of backboard, surface frame, display module, audio mould group and mainboard, due to display module, audio mould group and master
Plate running when can generate heat, if these heats cannot timely dissipation, be easy to cause the damage of TV components, thus
The service life of LCD TV is influenced, it is serious to be easy to happen security risk, therefore the heat dissipation of LCD TV just seems especially heavy
It wants, and the heat dissipation of LCD TV generally has heat dissipation and the components addition radiating subassembly two ways of backboard to carry out, components
This mode of radiating subassembly is added to be easy to influence the thickness of LCD TV and the increase of cost of manufacture, therefore dissipating relative to backboard
The mode of heat is used less, and the heat dissipation of backboard becomes the mainstream in market.
Existing patent document discloses a kind of TV heat dissipation pore structure, the patent No.: 201520330532.1, TV heat dissipation
Pore structure is specifically: on its side plate that TV rear shell is set, including heat release hole and dust-proof block reinforcement, heat release hole and TV rear shell
Inner cavity communicates, and heat release hole is venetian blind type, and dust-proof block reinforcement is set on the gap of heat release hole.TV disclosed in the patent document
Radiate pore structure, and there is also following defects: first, LCD TV itself operates the generated expansion of heat generally around
It dissipates, while most of heat is gathered in the upper end of backboard inner cavity, heat release hole can not efficiently and rapidly distribute heat, and heat is still
It can be accumulated in TV inner cavity；Second, heat release hole opens up the intensity that will certainly reduce backboard, cause the structure of TV backboard unstable
Gu being easily damaged；Although finishing between heat release hole and dust-proof block reinforcement third, its dust-proof block reinforcement can play certain dustproof effect
Unexpectedly there is gap, this gap still has dust entrance, to jeopardize the service life of internal component.
Therefore, research replaces HIPS and PS material using PP regrown material, to manufacture the electricity of large scale and oversize
Depending on machine shell, product defects are avoided, and at the same time improving its heat dissipation effect, extending television life-span, are become more urgent.
Summary of the invention
For the above-mentioned deficiency of the prior art, the purpose of the present invention is to provide a kind of injection molding sides of casing of liquid crystal television set
Method allows PP regrown material to replace HIPS and PS material using unique mold and Shooting Technique, for manufacturing big ruler
The housing of TV set product of very little, labyrinth, thin-wall product, is simplified, emphasis overcomes prior art system to prior art
The various products defect occurred when making such product.
The present invention also provides casing of liquid crystal television set obtained by a kind of implementation this method, are designed by the structure of optimization, and
The intensity of backboard is strengthened by improving the radiator structure of backboard while realization height radiates, it is practical.
Through the above scheme, the recycling of solve to give up in waste and old housing of TV set product backboard and discarded surface frame etc. is tired by the present invention
Difficult problem while fast degradation performance slows down the consumption to Resources, mitigates environmental pollution.
Provided technical solution is the present invention to achieve the above object:
A kind of injection moulding process of casing of liquid crystal television set, the casing of liquid crystal television set are made of PP regrown material comprising
Following steps:
(1) prepare PP regrown material, which is nutty structure, after ready, to PP regrown material
Grain starts the cleaning processing, and PP regrown material particle is put into nonionic surfactant solution and carries out immersion 8~15 minutes, so
PP regrown material particle is put into clear water afterwards and is cleaned 8~15 minutes, then it is 11~12 that PP regrown material particle, which is put into pH value,
Alkaline solution in impregnate 8~15 minutes, finally PP regrown material particle is put into clear water and is cleaned 8~15 minutes, complete PP
The cleaning process of regrown material particle；
(2) the PP regrown material particle after cleaning is put into dryer, drying to constant weight in 75~85 DEG C of temperature,
Drying time is 0.5~1 hour；
(3) prepare PP regrown material injection molding machine and a television enclosure injection mold, use PP regrown material injection molding machine and electricity
The PP regrown material particle after drying is processed depending on shell injection mold, the television enclosure injection mold includes hot-fluid system
System, cold flow system makes and hot-pressing system, the heat flow system are made of several hot flow paths, and the cold flow system makes are by several cold flows
Road is constituted, and the hot flow path and cold runner are made of runner and the nozzle being arranged in runner:
(4) PP regrown material after drying is packed into the hopper of PP regrown material injection molding machine；And by PP regrown material
Each area's temperature of screw in injection molding machine is set as 220~275 DEG C, then the cast gate of television enclosure injection mold and PP regrown material are molded
The nozzle of machine is connected；
(5) television enclosure injection mold is preheated, preheating temperature is set as 40~80 DEG C, then toward television enclosure injection mould
High temperature hot gas stream is passed through in the hot flow path of tool, when the hot-fluid channel temp of television enclosure injection mold reaches 220~275 DEG C,
Hot runner system running；
(6) melten gel and injection technique for setting PP regrown material injection molding machine, by the PP in PP regrown material injection molding machine hopper
In the type chamber that regrown material is molded into television enclosure injection mold after each area's fusion plastification of screw rod, according to the time period gradation sequence into
Row injection, injection pressure 1500-1800bar；
(7) it is passed through high temperature and pressure thermal current in the hot flow path of television enclosure injection mold, and adjusts hot-pressing system, is used in combination
Pressure pump be passed through in the cold runner of PP regrown material injection mold cold airflow to mold progress instantaneous cooling processing；
(8) it opens television enclosure injection mold and takes out television enclosure product, after being opened pickup, by warm air stream to TV
The hot flow path and cold runner of shell injection mold carry out cleaning impurity and drying process, so far complete entire injection step, are made
Television enclosure product.
Preferably, preheating temperature is set as 50 DEG C.
Preferably, each area's temperature of screw rod is set as 240 DEG C.
A kind of casing of liquid crystal television set prepared by the above method, the casing of liquid crystal television set includes surface frame and backboard, described
Surface frame and backboard are all made of PP regrown material and are made.
The backboard is in step-like structure, and the backboard is backboard top and the portion of backboard lower part two by bending part
Point, the lower end on the backboard top and be located at bending part at be provided with the first radiating part, middle part of the backboard lower part or so two
End is provided with the second radiating part, and the bottom of the backboard lower part is provided with third radiating part, and the inner cavity of the backboard is provided with
Several reinforcing ribs form a heat dissipation channel, open at one end and the first heat dissipation of the heat dissipation channel between the reinforcing rib two-by-two
Portion is connected, and another end opening of the heat dissipation channel is connected with third radiating part.
First radiating part and third radiating part are made of heat dissipation through slot and dust-proof block reinforcement two parts, and the heat dissipation is logical
Slot is venetian blind type structure, and the dust-proof block reinforcement is set on the gap of heat dissipation through slot, and second radiating part is by several heat dissipations
Through-hole composition.
First radiating part, the second radiating part and third radiating part are provided with dust cover, first radiating part with
The dust cover of third radiating part is located between heat dissipation through slot and dust-proof block reinforcement, and it is logical that the dust cover of second radiating part is located at heat dissipation
The inside in hole.
First radiating part is convex structure, and second radiating part is circular configuration.
Several fixation holes are provided on the backboard, the backboard is mutually fixed by the surface frame of fixation hole and TV, described
Several limit holes are additionally provided on backboard.
It has the advantages that compared with prior art
1, method provided by the invention, by the improvement of Shooting Technique and mold, realization use the substitution of PP regrown material with
Toward HIPS material commonly used in the art as the material of television backboard, overcomes the backboard that HIPS is made into and contain lead, mercury, bromine
The problems such as many harmful substances such as change fire retardant cause larger harm to environment, and the recycling for discarding backboard is extremely difficult.And it adopts
With PP regrown material, the difficulty of the recycling to television backboard and surface frame can be solved the problems, such as, unique fast degradation performance can
While to slow down the consumption to Resources significantly, environmental pollution can also be mitigated, to establishing resource-conserving, environmental-friendly
Type society, developing a circular economy has the function of positive and important meaning.
2, housing of TV set product of the invention, by the Curve guide impeller to structure, especially by using the first radiating part,
The Unique physical design of second radiating part and third radiating part, from multiple orientation, the heat to LCD TV inner cavity is diffused,
It solves the heat dissipation problem of LCD TV, the heat of LCD TV inner cavity is made sufficiently to scatter, heat dissipation performance is prominent.
3, the present invention is designed by using the structure of product reinforcing rib, is not only simplified mold and manufacturing process, is conducive to
Product injection defect is avoided, while also enhancing the mechanical strength of the products such as television backboard, in the heat dissipation of enhancing LCD TV
While performance, the stability of backboard ensure that；It forms a heat dissipation channel between reinforcing rib two-by-two at the same time, can also optimize
Shooting Technique, and product is made to draw heat toward at the heat dissipation through slot of radiating part by heat dissipation channel, thus accelerate the speed of heat dissipation,
Further increase the heat dissipation performance of LCD TV entirety.
4, the present invention is by using the Unique physical design of dust cover, and after the preliminary dust-break of dust-proof block reinforcement, dust cover is into one
Step prevents dust from entering the inside of LCD TV, effectively prevent on the electronic component of inside liquid crystal television that dust can be accumulated, from
And the heat for leading to component itself does not distribute not go out, and influences the original performance of electronic component, effectively prevents component and burn
And explosion, the safety is improved.
5, the present invention can be widely applied to various large scales (40 inches or more), oversize (65 to 75 inches) and pole
The television set of large scale (100 inches or more) model manufactures, enhance product performance, quality while, also improve non-defective unit
Rate reduces the manufacturing costs such as material and energy consumption.
In order to explain the structural features and functions of the invention more clearly, come with reference to the accompanying drawing with specific embodiment to its into
Row is described in detail.
Detailed description of the invention
Fig. 1 is Shooting Technique flow diagram of the invention；
Fig. 2 is back plate main body back structures schematic diagram of the invention；
Fig. 3 is back plate main body inner-cavity structure schematic diagram of the invention；
Fig. 4 is back plate main body bottom structure explosive view of the invention；
Fig. 5 is the first radiating part and third radiating part partial structural diagram of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1: referring to attached drawing 1, the injection moulding process of casing of liquid crystal television set provided by the invention, outside the LCD TV
Shell is made of PP regrown material comprising following steps:
(1) prepare PP regrown material, which is nutty structure, after ready, to PP regrown material
Grain starts the cleaning processing, and PP regrown material particle is put into nonionic surfactant solution and carries out immersion 8~15 minutes, so
PP regrown material particle is put into clear water afterwards and is cleaned 8~15 minutes, then it is 11~12 that PP regrown material particle, which is put into pH value,
Alkaline solution in impregnate 8~15 minutes, finally PP regrown material particle is put into clear water and is cleaned 8~15 minutes, complete PP
The cleaning process of regrown material particle；
(2) the PP regrown material particle after cleaning is put into dryer, drying to constant weight in 75~85 DEG C of temperature,
Drying time is 0.5~1 hour；
(3) prepare PP regrown material injection molding machine and a television enclosure injection mold, use PP regrown material injection molding machine and electricity
The PP regrown material particle after drying is processed depending on shell injection mold, the television enclosure injection mold includes hot-fluid system
System, cold flow system makes and hot-pressing system, the heat flow system are made of several hot flow paths, and the cold flow system makes are by several cold flows
Road is constituted, and the hot flow path and cold runner are made of runner and the nozzle being arranged in runner:
(4) PP regrown material after drying is packed into the hopper of PP regrown material injection molding machine；And by PP regrown material
Each area's temperature of screw in injection molding machine is set as 220~275 DEG C, then the cast gate of television enclosure injection mold and PP regrown material are molded
The nozzle of machine is connected；
(5) television enclosure injection mold is preheated, preheating temperature is set as 40~80 DEG C, then toward television enclosure injection mould
High temperature hot gas stream is passed through in the hot flow path of tool, when the hot-fluid channel temp of television enclosure injection mold reaches 220~275 DEG C,
Hot runner system running；
(6) melten gel and injection technique for setting PP regrown material injection molding machine, by the PP in PP regrown material injection molding machine hopper
In the type chamber that regrown material is molded into television enclosure injection mold after each area's fusion plastification of screw rod, according to the time period gradation sequence into
Row injection, injection pressure 1500-1800bar；
(7) it is passed through high temperature and pressure thermal current in the hot flow path of television enclosure injection mold, and adjusts hot-pressing system, is used in combination
Pressure pump be passed through in the cold runner of PP regrown material injection mold cold airflow to mold progress instantaneous cooling processing；
(8) it opens television enclosure injection mold and takes out television enclosure product, after being opened pickup, by warm air stream to TV
The hot flow path and cold runner of shell injection mold carry out cleaning impurity and drying process, so far complete entire injection step, are made
Television enclosure product.
As further improvement of the invention, it is preferable that preheating temperature is set as 50 DEG C.
As further improvement of the invention, it is preferable that each area's temperature of screw rod is set as 240 DEG C.
Referring to figure 2., Fig. 3, Fig. 4 and Fig. 5, the present invention also provides one kind casing of liquid crystal television set made of the above method,
The casing of liquid crystal television set includes surface frame and backboard, and the surface frame and backboard are all made of PP regrown material and are made；The backboard 1 is in
Step-like structure, the backboard 1 are divided to by bending part 2 for backboard top 3 and the part of backboard lower part 4 two, under the backboard 3
It holds and is located at bending part 2 and be provided with the first radiating part 5, the middle part left and right ends of the backboard lower part 4 are provided with second and dissipate
Hot portion 6, the bottom of the backboard lower part 4 are provided with third radiating part 7, and the inner cavity of the backboard 1 is provided with several reinforcing ribs 8,
A heat dissipation channel 9 is formed between the reinforcing rib two-by-two 8, the open at one end of the heat dissipation channel 9 is connected with the first radiating part 5
It connects, another end opening of the heat dissipation channel 9 is connected with third radiating part 7.
In the present embodiment, designed by using the structure of the first radiating part 5, the second radiating part 6 and third radiating part 7, from
Multiple orientation are diffused the heat of LCD TV inner cavity, solve the heat dissipation problem of LCD TV, make LCD TV inner cavity
Heat sufficiently scatter, heat dissipation performance is prominent；At the same time, it is designed by using the structure of reinforcing rib 8, strengthens the strong of backboard
Degree ensure that the stability of backboard, at the same time two-by-two between reinforcing rib 8 while enhancing the heat dissipation performance of LCD TV
Heat dissipation channel 9 is formed, heat is drawn toward at the heat dissipation through slot of radiating part by heat dissipation channel 9, thus accelerate the speed of heat dissipation, into
The heat dissipation performance of one step raising LCD TV entirety.
As the further improvement of the present invention, first radiating part 5 by heat dissipation through slot 10 and is prevented with third radiating part 7
11 two parts of dirt block reinforcement composition, the heat dissipation through slot 10 are venetian blind type structure, and the dust-proof block reinforcement 11 is set to heat dissipation through slot
On 10 gap, second radiating part 6 is made of several thermal vias.
As further improvement of the invention, first radiating part 5, the second radiating part 6 are respectively provided with third radiating part 7
There is a dust cover, the dust cover of first radiating part 5 and third radiating part 7 is located between heat dissipation through slot 10 and dust-proof block reinforcement 11,
The dust cover of second radiating part 6 is located at the inside of thermal vias.
In the present embodiment, designed by using the structure of dust cover, after the preliminary dust-break of dust-proof block reinforcement 11, dust cover is into one
Step prevents dust from entering the inside of LCD TV, effectively prevent on the electronic component of inside liquid crystal television that dust can be accumulated, from
And the heat for leading to component itself does not distribute not go out, and influences the original performance of electronic component, effectively prevents component and burn
And explosion, the safety is improved.
As further improvement of the invention, first radiating part 5 is convex structure, and second radiating part 6 is
Circular configuration.
As further improvement of the invention, several fixation holes are provided on the backboard 1, the back plate main body 1 passes through
The surface frame of fixation hole and TV is mutually fixed, and is additionally provided with several limit holes on the backboard 1.
As further improvement of the invention, the backboard 1 is made of PP regrown material.
In the present embodiment, replace previous HIPS material commonly used in the art as backboard by using PP regrown material
Material larger danger is caused to environment because the backboard that HIPS is made into contains many harmful substances such as lead, mercury, brominated flame retardant
Evil, and the recycling of discarded backboard is extremely difficult, and ask difficult to the recycling of backboard and surface frame can be solved using PP regrown material
Topic, while unique fast degradation performance can slow down the consumption to Resources significantly, can also mitigate environmental pollution,
To resource-conserving and environment-friendly society is established, developing a circular economy has the function of positive and important meaning.
Emphasis of the present invention essentially consists in: providing a kind of injection moulding process of casing of liquid crystal television set, preparation process simplifies, again with PP
Green material replaces HIPS and PS material, by regenerating by the recovery processing of waste PP regrown material, then by obtained PP is recycled
Material granule first cleans, then carries out injection molding, and work efficiency is high, low manufacture cost, to establishing resource-conserving, environmental-friendly
Type society, developing a circular economy has the function of positive and important meaning；It additionally provides and a kind of implements casing of liquid crystal television set
Casing of liquid crystal television set obtained by injection moulding process solves asking for the recycling difficulty of give up in waste and old television set backboard and discarded surface frame
Topic while fast degradation performance slows down the consumption to Resources, mitigates environmental pollution, and the heat dissipation by improving backboard
Structure strengthens the intensity of backboard while realizing high heat dissipation, practical.
The above described is only a preferred embodiment of the present invention, being not intended to limit the present invention in any form.Appoint
What those skilled in the art, without departing from the scope of the technical proposal of the invention, all using the side of the disclosure above
Method and technology contents make many possible changes and modifications to technical solution of the present invention, or are revised as the equivalent reality of equivalent variations
Apply example.Therefore anything that does not depart from the technical scheme of the invention, equivalent change made by shape according to the present invention, construction and principle
Change, should all be covered by protection scope of the present invention.
Claims (8)
1. a kind of injection moulding process of casing of liquid crystal television set, which is characterized in that the casing of liquid crystal television set uses PP regrown material system
At comprising following steps:
(1) prepare PP regrown material, the PP regrown material be nutty structure, after ready, to PP regrown material particle into
PP regrown material particle is put into nonionic surfactant solution and carries out immersion 8~15 minutes, then will by row cleaning treatment
PP regrown material particle is put into clear water and cleans 8~15 minutes, then PP regrown material particle is put into the alkali that pH value is 11~12
Property solution in impregnate 8~15 minutes, finally PP regrown material particle is put into clear water and is cleaned 8~15 minutes, complete PP regeneration
The cleaning process of material granule；
(2) the PP regrown material particle after cleaning is put into dryer, drying to constant weight in 75~85 DEG C of temperature, drying
Time is 0.5~1 hour；
(3) prepare PP regrown material injection molding machine and television enclosure injection mold, use PP regrown material injection molding machine and television enclosure
Injection mold processes the PP regrown material particle after drying, and the television enclosure injection mold includes heat flow system, cold
Streaming system and hot-pressing system, the heat flow system are made of several hot flow paths, and the cold flow system makes are by several cold runner structures
At the hot flow path and cold runner are made of runner and the nozzle being arranged in runner:
(4) PP regrown material after drying is packed into the hopper of PP regrown material injection molding machine；And PP regrown material is molded
Each area's temperature of machine screw rod is set as 220~275 DEG C, then by the cast gate of television enclosure injection mold and PP regrown material injection molding machine
Nozzle is connected；
(5) television enclosure injection mold is preheated, preheating temperature is set as 40~80 DEG C, then toward television enclosure injection mold
High temperature hot gas stream is passed through in hot flow path, when the hot-fluid channel temp of television enclosure injection mold reaches 220~275 DEG C, hot-fluid
Road system operation；
(6) melten gel and injection technique for setting PP regrown material injection molding machine, the PP in PP regrown material injection molding machine hopper is regenerated
In the type chamber that material is molded into television enclosure injection mold after each area's fusion plastification of screw rod, gradation sequence is penetrated according to the time period
Glue, injection pressure 1500-1800bar；
(7) it is passed through high temperature and pressure thermal current in the hot flow path of television enclosure injection mold, and adjusts hot-pressing system, and use pressure
Pump be passed through in the cold runner of PP regrown material injection mold cold airflow to mold progress instantaneous cooling processing；
(8) it opens television enclosure injection mold and takes out television enclosure product, after being opened pickup, by warm air stream to television enclosure
The hot flow path and cold runner of injection mold carry out cleaning impurity and drying process, so far complete entire injection step, and TV is made
Shell product.
2. the injection moulding process of casing of liquid crystal television set according to claim 1, which is characterized in that preheating temperature is set as 50 DEG C.
3. the injection moulding process of casing of liquid crystal television set according to claim 1, which is characterized in that each area's temperature of screw rod is set as
240℃。
4. casing of liquid crystal television set made of a kind of one of -3 the methods according to claim 1, which is characterized in that the liquid crystal electricity
It include surface frame and backboard depending on shell, the surface frame and backboard are all made of PP regeneration granular materials and are made；The backboard is in step-like
Structure, the backboard are backboard top and the part of backboard lower part two, the lower end and position on the backboard top by bending part
The first radiating part is provided at bending part, the middle part left and right ends of the backboard lower part are provided with the second radiating part, described
The bottom of backboard lower part is provided with third radiating part, and the inner cavity of the backboard is provided with several reinforcing ribs, the reinforcing rib two-by-two
Between form a heat dissipation channel, the open at one end of the heat dissipation channel is connected with the first radiating part, the heat dissipation channel it is another
It is open at one end to be connected with third radiating part.
5. casing of liquid crystal television set according to claim 4, which is characterized in that first radiating part and third radiating part are equal
It is made of heat dissipation through slot and dust-proof block reinforcement two parts, the heat dissipation through slot is venetian blind type structure, and the dust-proof block reinforcement is set to
It radiates on the gap of through slot, second radiating part is made of several thermal vias.
6. casing of liquid crystal television set according to claim 5, which is characterized in that first radiating part, the second radiating part with
Third radiating part is provided with dust cover, the dust cover of first radiating part and third radiating part be located at heat dissipation through slot with it is dust-proof
Between block reinforcement, the dust cover of second radiating part is located at the inside of thermal vias.
7. casing of liquid crystal television set according to claim 4, which is characterized in that first radiating part is convex structure,
Second radiating part is circular configuration.
8. casing of liquid crystal television set according to claim 4, which is characterized in that several fixation holes are provided on the backboard,
The backboard is mutually fixed by the surface frame of fixation hole and TV, and several limit holes are additionally provided on the backboard.
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| CN201811192620.4A CN109228010B (en) | 2018-10-13 | 2018-10-13 | Injection molding method of liquid crystal display television shell and product thereof |
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|---|---|---|---|
| CN201811192620.4A CN109228010B (en) | 2018-10-13 | 2018-10-13 | Injection molding method of liquid crystal display television shell and product thereof |
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| CN109228010B CN109228010B (en) | 2024-02-13 |
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