CN107471607A - A kind of waste material extrusion-blown modling and the preparation method for eliminating weld bond - Google Patents
A kind of waste material extrusion-blown modling and the preparation method for eliminating weld bond Download PDFInfo
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- CN107471607A CN107471607A CN201710501243.7A CN201710501243A CN107471607A CN 107471607 A CN107471607 A CN 107471607A CN 201710501243 A CN201710501243 A CN 201710501243A CN 107471607 A CN107471607 A CN 107471607A
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- China
- Prior art keywords
- waste material
- preparation
- weld bond
- parison
- mould
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/04—Extrusion blow-moulding
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/4284—Means for recycling or reusing auxiliaries or materials, e.g. blowing fluids or energy
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/64—Heating or cooling preforms, parisons or blown articles
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/72—Deflashing outside the mould
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/72—Deflashing outside the mould
- B29C2049/725—Means for removing the deflashed parts from the deflashing area, e.g. burrs being removed from the deflashing area by a conveyor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Abstract
The present invention relates to blow molding process field, there is provided the preparation method of a kind of waste material extrusion-blown modling and elimination weld bond is by the recycling of leftover bits, and environmentally friendly and cost is low, non-secondary pollution;High glaze, and weldless line defect in appearance is realized, avoids the follow-up plating, the lacquer spraying technique that are used for covering weld bond;The parison is drawn using negative pressure tractive force, can be after parison blanking, in the die cavity into mould of fast and stable, the whole process time is short, can effectively avoid parison because crystallize it is too fast caused by be difficult to be molded, windrow buildup phenomenon, the percent defective of part is reduced, has saved man-hour, improves production efficiency, with high intensity, high tenacity, the advantages of cost-effective, and have the advantages that appearance looks elegant, moulding are changeable, and technique is green concurrently.
Description
Technical field
The invention belongs to blow molding process technical field, and in particular to a kind of waste material extrusion-blown modling and the preparation for eliminating weld bond
Method.
Background technology
At this stage, plastic material is widely used in the production and living of people, annual resulting waste plastic and
Plastics scrap feed material is also stepped up, and for these discarded objects, the way of generally use is to carry out garbage disposal to it, at this stage
Either burning disposal or landfill disposal, the pollution that substantial amounts of plastic waste is brought are not avoided that.
At present, developing rapidly with plastics industry, plastic products are widely used in all trades and professions, penetrate into people's life
Produce various aspects living.Injection moulding is as one of forming method important in plastic processing, in each neck of national economy
Domain is all widely used.But with plastic products application it is increasingly extensive, people to plastic products precision, shape, function, into
This etc. proposes higher requirement, and traditional injection molding technique has been difficult in adapt to this requirement.Injection molding process base has
There is the shortcomings that low strength, compression molding process base has complex manufacturing, costly and brittle fracture easily occurs
Shortcoming.For above-mentioned technology, those skilled in the art's problem urgently to be resolved hurrily is the shortcomings that exploitation one kind compensate for the two
Base product extrusion blow molding process, the shortcomings that this technology can make up the two, there is high intensity, high tenacity, it is cost-effective
Advantage, and have the advantages that appearance looks elegant, moulding are changeable, and technique is green concurrently, the blank in this field is filled up, suitable for big face
Product is promoted.
Conventional blowing processing method and water route and auxiliary equipment cause weld bond in appearance not avoid at present, only
It can be covered using follow-up plating lacquer spraying technique, cause various complicated, the product rejection rate height of product sequence, energy consumption is big, pollutes
Greatly.The water route of traditional moulds sets that clocking requirement temperature is as far as possible constant, but when plastics flow in a mold front end plastics temperature
Degree gradually lowers, and decline docking location when two strands of front end plastics merge due to temperature forms an obvious visual object line,
Referred to as weld bond, cause product appearance defect, intensity decreases.
The content of the invention
【1】Technical problems to be solved
The technical problem to be solved in the present invention is to provide a kind of waste material extrusion-blown modling and eliminate weld bond preparation method, one
The recycling of aspect leftover bits, environmentally friendly and cost is low, non-secondary pollution, on the other hand reduces the processing of blow molding process
Duration, avoid parison from solidifying, improve the weight and uniformity of blow molded product.
【2】The technical scheme solved the problems, such as
The present invention provides a kind of waste material extrusion-blown modling and eliminates the preparation method of weld bond, comprises the following steps:
Step A, crushed after the waste material sorting of recovery is gone into the removal of impurity, obtain broken raw material, pass through feeder or artificial
It is sent in the hopper on blow moulding machine;
Step B, sets warm temperature, is squeezed, under the thrust of stirring in the rotation of screw rod, by the plastic cement material after melting
Material pushes front end to from the rear end of barrel, reinjects in the accumulator of head;
Step C, the accumulator heating heating of head, the raw material come from barrel is maintained at gel state, in the thrust of screw rod
Flow out, extrude to the upper end of mould after heating and thermal insulation out of head under effect, while provided downwards in the bottom of the mould
Negative pressure tractive force, so that parison Fast Filling is into the die cavity of the mould;
Step D, blown to the inside of the parison, the outer surface of the parison and the die cavity inner surface of the mould paste
Close;
Step E, is cooled down to being molded after the parison pressurize preset time, and cold water is injected into water route during cooling stage, fast
The low mold temperature of prompt drop makes plastics coagulation forming mold pickup into product;
Step F, after completing to mold pickup, compressed air is blown into mould, is reinjected after blowing off the water droplet in water route
High temperature compressed steam improves mold temperature, carries out next circulation.
Above-mentioned waste material extrusion-blown modling and the preparation method for eliminating weld bond, the waste material be engineered plastics material be ABS,
Mixing glass, the one of which in PC or two kinds.
Above-mentioned waste material extrusion-blown modling and the preparation method for eliminating weld bond, waste material is sent into pulverizer in the step A
Crushed, obtain 5~20mm of length, 5~20mm of width broken raw material.
Above-mentioned waste material extrusion-blown modling and the preparation method for eliminating weld bond, by broken measuring raw materials in the step B
Weigh, mould is put into barrel after weighing, the warm temperature of the barrel is set to 160-210 DEG C.
Above-mentioned waste material extrusion-blown modling and the preparation method for eliminating weld bond, in the step C head accumulator plus
Hot temperature maintains 180-210 DEG C, controls material temperature, holding raw material is gel state.
Negative pressure tractive force provides to be arranged at the negative pressure device of the mold bottom in the step C, and the negative pressure fills
The inlet scoop diameter put is more than the diameter of the parison.
Above-mentioned waste material extrusion-blown modling and the preparation method of elimination weld bond, the step C also pass through wall including step C1
The raw material that thick adjustment control device comes out head enters mould with columnar gel state, needs to maintain among pipe-like material embryo
A certain amount of air, pipe-like material embryo tail end need to close envelope gas, and expect that the wall thickness of embryo each position need to be adjusted according to product demand.
Above-mentioned waste material extrusion-blown modling and the preparation method for eliminating weld bond, air pressure is maintained at 0.5Mpa in the step D
~0.9MPa, mold closing time 18-21s, it is about 3s to keep gassing time.
Above-mentioned waste material extrusion-blown modling and the preparation method for eliminating weld bond, cooling and shaping processing is molded in the step E,
According to the products thickness and book size, temperature control controls cool time 60-100s at 60-70 DEG C.
Above-mentioned waste material extrusion-blown modling and the preparation method of elimination weld bond, the step E comprise the following steps:
Step E1, finished product is subjected to sanding and removes edge flash, overlap, makes the finished surface is smooth to be easy to the later stage to fill
Decorations colouring;
Step E2, the finished product after deburring is first surface-treated with thermoplastic transparent priming, then to it is described into
Do paint for decoration in product surface.
【3】Beneficial effect
The recovery that the preparation method of this waste material extrusion-blown modling of the present invention and elimination weld bond passes through leftover bits circulates profit
With environmentally friendly and cost is low, non-secondary pollution;High glaze, and weldless line defect in appearance is realized, avoids follow-up be used for
Cover plating, the lacquer spraying technique of weld bond;The parison is drawn using negative pressure tractive force, can after parison blanking,
In the die cavity into mould of fast and stable, the whole process time is short, can effectively avoid parison difficult caused by crystallization is too fast
With shaping, windrow buildup phenomenon, reduce the percent defective of part, saved man-hour, improve production efficiency, have high intensity,
High tenacity, it is cost-effective the advantages of, and have the advantages that appearance looks elegant, moulding are changeable, and technique is green concurrently.
Brief description of the drawings
Fig. 1 is a kind of waste material extrusion-blown modling of the present invention and eliminates the structural representation of the preparation method of weld bond.
Embodiment
Below in conjunction with the accompanying drawings, the embodiment of the present invention is discussed in detail.Refering to Fig. 1, the present invention provides a kind of waste material extrusion-blown modling
And the preparation method of weld bond is eliminated, comprise the following steps:
Step A, crushed after the waste material sorting of recovery is gone into the removal of impurity, obtain broken raw material, pass through feeder or artificial
It is sent in the hopper on blow moulding machine;
Step B, sets warm temperature, is squeezed, under the thrust of stirring in the rotation of screw rod, by the plastic cement material after melting
Material pushes front end to from the rear end of barrel, reinjects in the accumulator of head;
Step C, the accumulator heating heating of head, the raw material come from barrel is maintained at gel state, in the thrust of screw rod
Flow out, extrude to the upper end of mould after heating and thermal insulation out of head under effect, while provided downwards in the bottom of the mould
Negative pressure tractive force, so that parison Fast Filling is into the die cavity of the mould;
Step D, blown to the inside of the parison, the outer surface of the parison and the die cavity inner surface of the mould paste
Close;
Step E, is cooled down to being molded after the parison pressurize preset time, and cold water is injected into water route during cooling stage, fast
The low mold temperature of prompt drop makes plastics coagulation forming mold pickup into product;
Step F, after completing to mold pickup, compressed air is blown into mould, is reinjected after blowing off the water droplet in water route
High temperature compressed steam improves mold temperature, carries out next circulation.
Make the acute variation of injection mold mold temperature active within each mould production cycle in this way, work as mould
When the glass transition temperature that temperature is higher than plastics is more than 180 DEG C, plastics flow in mould remains this temperature, front end stream
Temperature keeps high temperature, combines that effect is fairly good will not produce weld bond when two stock materials merge.Before next circulation is entered first
The water droplet in water route is blown off so that more quick when being filled with compressed steam and improving mold temperature and be easily controlled whole mould
It is maintained at mutually synthermal.
Further, the preferred embodiment of the preparation method of a kind of waste material extrusion-blown modling of the present invention and elimination weld bond
In, the waste material be engineered plastics material be ABS, mixing glass, the one of which in PC or two kinds.
Further, the preferred embodiment of the preparation method of a kind of waste material extrusion-blown modling of the present invention and elimination weld bond
In, waste material feeding pulverizer is crushed in the step A, obtains 5~20mm of length, 5~20mm of width broken former material
Material.
Further, the preferred embodiment of the preparation method of a kind of waste material extrusion-blown modling of the present invention and elimination weld bond
In, broken measuring raw materials are weighed in the step B, mould is put into barrel after weighing, the warm temperature of the barrel
It is set to 160-210 DEG C.
Further, the preferred embodiment of the preparation method of a kind of waste material extrusion-blown modling of the present invention and elimination weld bond
In, the heating-up temperature of the accumulator of head maintains 180-210 DEG C in the step C, controls material temperature, holding raw material is gel
State.
In the present embodiment, temperature control is the key link in extrusioning blowing process production, and it directly affects product matter
Amount, it is necessary to assure barrel and head temperature are uniform.When temperature is too high, waste material easily decomposes, and waste material embrittlement, especially makes longitudinal direction
Tensile strength is remarkably decreased.When the temperature is too low, then waste material plasticizing is bad, it is impossible to sleekly carries out expansion stretching, tensile strength
Reduce, and the glossiness on surface, poor transparency, or even the flake for decorative pattern occur and not melting.
Further, the preferred embodiment of the preparation method of a kind of waste material extrusion-blown modling of the present invention and elimination weld bond
In, negative pressure tractive force provides to be arranged at the negative pressure device of the mold bottom in the step C, and the suction of the negative pressure device
Tuyere diameter is more than the diameter of the parison.So that mould inside has enough attractions, parison can Quick uniform pass through
Mould, be advantageous to the stable molding of parison, can effectively prevent parison from causing because crystallizing the flat bonding of too fast or internal suction in parison
Portion produces flash.
The effect of negative pressure tractive force is that enough attractions are provided for mould inside, effect of the parison in negative pressure tractive force
Under, coordinate the gravity of parison itself, the time can be saved quickly by mould.Negative pressure device is specially vacuum sheave, very
The suction foot of empty sheave, traction effect are good.
Through hole at the inlet scoop of negative pressure device is set should be uniform, avoids parison suction is flat from causing flash.The blow molding
Method, using the technique of first matched moulds blanking again, and parison is drawn using negative pressure tractive force, can after parison blanking,
In the die cavity into mould of fast and stable, the whole process time is short, can effectively avoid parison difficult caused by crystallization is too fast
With shaping, windrow buildup phenomenon, the percent defective of part is reduced, has saved man-hour, improves production efficiency.
Further, the preferred embodiment of the preparation method of a kind of waste material extrusion-blown modling of the present invention and elimination weld bond
In, the step C also includes step C1 makes the raw material that head comes out with columnar gel state by wall thickness adjustment control device
Into mould, need to maintain a certain amount of air among pipe-like material embryo, pipe-like material embryo tail end need to close envelope gas, and expect that embryo is each
The wall thickness of position need to be adjusted according to product demand.
Further, the preferred embodiment of the preparation method of a kind of waste material extrusion-blown modling of the present invention and elimination weld bond
In, air pressure is maintained at 0.5Mpa~0.9MPa, mold closing time 18-21s in the step D, and holding gassing time is about
3s。
Further, the preferred embodiment of the preparation method of a kind of waste material extrusion-blown modling of the present invention and elimination weld bond
In, in the step E mold cooling and shaping processing, according to the products thickness and book size, temperature control at 60-70 DEG C,
Control cool time 60-100s.
Further, the preferred embodiment of the preparation method of a kind of waste material extrusion-blown modling of the present invention and elimination weld bond
In, the step E comprises the following steps:
Step E1, finished product is subjected to sanding and removes edge flash, overlap, makes the finished surface is smooth to be easy to the later stage to fill
Decorations colouring;
Step E2, the finished product after deburring is first surface-treated with thermoplastic transparent priming, then to it is described into
Paint for decoration is done on product surface, can be ceramic paint, acrylic acid floor paint, aqueous environment protection paint etc..
The recovery that the preparation method of this waste material extrusion-blown modling of the present invention and elimination weld bond passes through leftover bits circulates profit
With environmentally friendly and cost is low, non-secondary pollution;High glaze, and weldless line defect in appearance is realized, avoids follow-up be used for
Cover plating, the lacquer spraying technique of weld bond;The parison is drawn using negative pressure tractive force, can after parison blanking,
In the die cavity into mould of fast and stable, the whole process time is short, can effectively avoid parison difficult caused by crystallization is too fast
With shaping, windrow buildup phenomenon, reduce the percent defective of part, saved man-hour, improve production efficiency, have high intensity,
High tenacity, it is cost-effective the advantages of, and have the advantages that appearance looks elegant, moulding are changeable, and technique is green concurrently.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, some improvements and modifications can also be made, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of waste material extrusion-blown modling and the preparation method for eliminating weld bond, it is characterised in that comprise the following steps:
Step A, crushed after the waste material sorting of recovery is gone into the removal of impurity, obtain broken raw material, pass through feeder or artificial transmission
In hopper on to blow moulding machine;
Step B, sets warm temperature, screw rod rotation squeeze, stirring thrust under, by the plastic material after melting from
The rear end of barrel pushes front end to, reinjects in the accumulator of head;
Step C, the accumulator heating heating of head, the raw material come from barrel is maintained at gel state, in the thrust of screw rod
Under flowed out out of head after heating and thermal insulation, extrude to the upper end of mould, while downward negative pressure is provided in the bottom of the mould
Tractive force, so that parison Fast Filling is into the die cavity of the mould;
Step D, blown to the inside of the parison, the outer surface of the parison is bonded with the die cavity inner surface of the mould;
Step E, is cooled down to being molded after the parison pressurize preset time, and cold water is injected into water route during cooling stage, rapid drop
Low mold temperature makes plastics coagulation forming mold pickup into product;
Step F, after completing to mold pickup, compressed air is blown into mould, high temperature is reinjected after blowing off the water droplet in water route
Compressed steam improves mold temperature, carries out next circulation.
2. a kind of waste material extrusion-blown modling according to claim 1 and the preparation method for eliminating weld bond, it is characterised in that institute
State waste material be engineered plastics material be ABS, mixing glass, the one of which in PC or two kinds.
3. a kind of waste material extrusion-blown modling according to claim 1 and the preparation method for eliminating weld bond, it is characterised in that institute
State in step A and crushed waste material feeding pulverizer, obtain 5~20mm of length, 5~20mm of width broken raw material.
4. a kind of waste material extrusion-blown modling according to claim 1 and the preparation method for eliminating weld bond, it is characterised in that institute
State in step B and broken measuring raw materials are weighed, mould is put into barrel after weighing, the warm temperature of the barrel is set to
160-210℃。
5. a kind of waste material extrusion-blown modling according to claim 1 and the preparation method for eliminating weld bond, it is characterised in that institute
The heating-up temperature for stating the accumulator of head in step C maintains 180-210 DEG C, controls material temperature, holding raw material is gel state.
6. a kind of waste material extrusion-blown modling according to claim 5 and the preparation method for eliminating weld bond, it is characterised in that institute
Negative pressure tractive force in step C is stated to provide to be arranged at the negative pressure device of the mold bottom, and the inlet scoop of the negative pressure device
Diameter is more than the diameter of the parison.
7. a kind of waste material extrusion-blown modling according to claim 6 and the preparation method for eliminating weld bond, it is characterised in that institute
Stating step C also includes step C1, and the raw material for coming out head by wall thickness adjustment control device is entered with columnar gel state
Mould, need among pipe-like material embryo to maintain a certain amount of air, pipe-like material embryo tail end need to close envelope gas, and expect embryo each position
Wall thickness need to be adjusted according to product demand.
8. a kind of waste material extrusion-blown modling according to claim 1 and the preparation method for eliminating weld bond, it is characterised in that institute
State air pressure in step D and be maintained at 0.5Mpa~0.9MPa, mold closing time 18-21s, it is about 3s to keep gassing time.
9. a kind of waste material extrusion-blown modling according to claim 1 and the preparation method for eliminating weld bond, it is characterised in that institute
State and cooling and shaping processing is molded in step E, according to the products thickness and book size, for temperature control at 60-70 DEG C, control is cold
But time 60-100s.
10. the preparation method of a kind of waste material pressing according to claim 1, it is characterised in that the step E includes
Following steps:
Step E1, finished product is subjected to sanding and removes edge flash, overlap, make the finished surface is smooth to be easy to the later stage to decorate
Color;
Step E2, the finished product after deburring is first surface-treated with thermoplastic transparent priming, then to the assembled watch
Do paint for decoration in face.
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Cited By (4)
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CN109834920A (en) * | 2018-12-26 | 2019-06-04 | 天津富松汽车零部件有限公司 | The blow moulding equipment of expanded moldings inside hollow blow molding |
CN110370693A (en) * | 2019-07-30 | 2019-10-25 | 楚成塑胶制品(湖州)有限公司 | Skin care item plastic packaging containers process equipment and its production technology |
CN111216281A (en) * | 2019-12-02 | 2020-06-02 | 浙江华诺医药包装有限公司 | Label separator |
CN111216281B (en) * | 2019-12-02 | 2022-01-14 | 浙江华诺医药包装有限公司 | Label separator |
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