CN107877774A - Perforated plastic part and its forming method and cooking appliance - Google Patents
Perforated plastic part and its forming method and cooking appliance Download PDFInfo
- Publication number
- CN107877774A CN107877774A CN201610872980.3A CN201610872980A CN107877774A CN 107877774 A CN107877774 A CN 107877774A CN 201610872980 A CN201610872980 A CN 201610872980A CN 107877774 A CN107877774 A CN 107877774A
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- Prior art keywords
- layer
- mould
- thin slice
- plastic part
- glue
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Classifications
-
- 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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
- A47J36/04—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay the materials being non-metallic
-
- 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
- B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
-
- 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
- B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
- B29C45/0055—Shaping
-
- 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
- B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
- B29C45/0055—Shaping
- B29C2045/0058—Shaping removing material
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Food Science & Technology (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
The invention provides a kind of perforated plastic part and its forming method and cooking appliance.The forming method of the perforated plastic part includes：Prepare Double-color forming die, including：Mould before mould, second before rear mold, first；By the first preceding mould and rear die combination, the first layer of perforated plastic part is molded between mould and rear mold before first；By the second preceding mould and rear die combination, the second layer of perforated plastic part is molded between mould and first layer before second, wherein, thin slice glue position corresponding with the hole to be formed on the second layer is provided between mould and first layer before second, the melt flowing in thin slice glue position forms the thin slice waste material being integrated with the second layer；Thin slice waste material is cut off using cutting system in mould, obtains perforated plastic part finished product.Above-mentioned technical proposal, using two-shot molding process eliminate because shaping button bit, the structure such as post and caused by current mark；Glue is entered using thin slice, earnestly eliminated in mould because of structures such as forming hole, holes and caused by weld bond, ensure the external aesthetical decorative effect of product product.
Description
Technical field
The present invention relates to injection molding technology field, more specifically, is related to a kind of forming method of perforated plastic part, especially
It is to be related to the plastics for having superficial aesthetic decorative effect with one kind to realize a kind of shaping of perforated plastic part on corresponding mould
Method, using perforated plastic part made of the forming method and with the perforated plastic part cooking appliance.
Background technology
In product design or manufacture, to obtain specific surface effect, such as bloom, metal-like, often to outward appearance
Working of plastics is sprayed, but can derive problems after spraying, as cost increase, production cycle extension, aqueous vapor environment are dirty
Dye etc., therefore, people make the surface of the product product of injection molding to have imitative spray without spraying by plastic material exploitation
Apply effect.
However, outward appearance working of plastics is after moulding, generally because the features such as hole, hole on working of plastics be present, and outside product
Form weld bond on sight face, the low intensity in weld bond region, be easily caused working of plastics cracking, and with working of plastics ontological existence aberration；
When outward appearance working of plastics is assembled on another working of plastics, button bit, post, muscles and bones position feature need to be generally molded on a working of plastics,
Shaping button bit hole characteristic on another working of plastics, but button bit, the presence of post, muscles and bones position, easily in the appearance of product product
Form current mark, current mark region and working of plastics ontological existence aberration；It is molten caused by painted plastic part injection molding particularly with exempting from
Wiring, current mark are more obvious, influence the appearance of product product, cause the application of moulding to be restricted.
The content of the invention
It is contemplated that at least solves one of technical problem present in prior art.
Therefore, the purpose of the first aspect of the invention is, there is provided a kind of forming method of perforated plastic part.
The purpose of the second aspect of the invention is, there is provided the forming method of another perforated plastic part.
The purpose of the third aspect of the invention is, there is provided a kind of forming method using above-mentioned perforated plastic part is made
Perforated plastic part.
The purpose of the fourth aspect of the invention is, there is provided a kind of cooking appliance with above-mentioned perforated plastic part.
To achieve the above object, the embodiment of the first aspect of the invention provides a kind of shaping side of perforated plastic part
Method, including：S102, prepare Double-color forming die, including：Rear mold, in one-shot forming with it is described after die combination first before mould,
Mould in post forming and before the second of the rear die combination；S104, by mould before described first with it is described after die combination, described
The first layer of perforated plastic part is molded before first between mould and the rear mold；S106, by mould before described second with it is described after module
Close, be molded the second layer of perforated plastic part between mould and the first layer before described second, wherein, mould and institute before described second
State and be provided with thin slice glue position corresponding with the hole to be formed on the second layer between first layer, flow to molten in the thin slice glue position
Material forms the thin slice waste material being integrated with the second layer；S108, the thin slice waste material is cut off using cutting system in mould, with institute
State and the second hole is molded on the second layer, obtain the perforated plastic part finished product that the first layer is integrated with the second layer.
The forming method for the perforated plastic part that the above embodiment of the present invention provides, led to using two-shot molding process in shaping
Overheat, pressure realize the combination of two working of plastics, so as to eliminate on two working of plastics because of the assembling knot such as the button bit needed for assembling, post
Structure, so eliminate because of assembly features such as button bit, posts and caused by current mark, and ensure that the bonding strength of two working of plastics, save
The assembly process needed for separately formed two working of plastics has been removed, the assembling of two single parts is realized integration, improves assembling
Quality improves production efficiency simultaneously；Using being provided with thin slice glue corresponding with the hole to be formed on the second layer in mold cavity
Position, melt is set to flow in the flow process of filling die cavity and fill thin slice glue position, so that perforated plastic part and thin slice glue position
Interior thin slice waste material is connected as a single entity, and thin slice glue position plays drainage, melt is not occurred in the flow process of filling die cavity
Shunting, enter without possessing the condition for producing weld bond, thus eliminate because of the presence of the architectural features such as hole, hole and caused by welding
Line, so as to solve the problems such as causing low product local strength, bad order because of weld bond presence, and secondary add is not needed
Work cuts off thin slice waste material, reduces manufacturing procedure, improves production efficiency；So as to pass through above-mentioned double-shot moulding, thin slice
Enter glue, the earnestly cooperation of moulding process in mould so that the defects of the outer surface no color differnece of product product, weld bond, current mark, ensure
The exterior decorative effect of product product, and molding procedure simplifies, production efficiency is high.
Using perforated plastic part made of above-mentioned moulding process, the main function of first layer is in structural support second
Layer simultaneously assembles with other structures, and first layer has partial appearance face, has certain decoration function；Second layer surface is with aesthetics
Porose feature in effect, structure, the signified aesthetic effect of the second layer surface refer mainly to pearl effect or metal-like effect,
Or the effect of pearly-lustre+metal-like mixture effect or imitative sprayed surface one kind, and different colours are carried out on this aesthetic effect
Toning；One layer be first molded is structural member, one layer of aftershaping is be molded over the appearance ornamental pieces on structural member surface, outward appearance
On the outer surface of decoration the defects of weldless line, current mark, thus without covering weld bond and current mark by spraying, you can obtain
Obtain appearance well；For example, for electric cooker, the cover of electric pressure cooking saucepan and cover cosmetic sheet, can use it is above-mentioned into
Cover and cover cosmetic sheet are shaped to a part by type method, and one layer be first molded be cover, one layer of aftershaping be cover
Cosmetic sheet, the assembling for together, eliminating independent two parts is had been incorporated into by two parts when dual-color forming, i.e. depanning, and
Eliminate shaping button bit, the assembling structure such as post, so as to solve because button bit, the isostructural presence of post and caused by current mark；Simultaneously
The button hole characteristic that must retain during for Element Design, glue is entered using thin slice, earnestly technique is eliminated because of the presence in hole, hole in mould
And caused weld mark；And the stereovision and appearance of product-forming by the difference of both materials, can be ensured.
It should be noted that it can be set according to Rational Parameters such as the shape in specific working of plastics and its hole to be formed, sizes thin
The shape and size of piece glue position, are easy to play the drainage of thin slice glue position, and cutting knife is smoothly cut off thin slice waste material.
In addition, the forming method for the perforated plastic part that the above embodiment of the present invention provides also has following supplementary technology special
Sign：
According to one embodiment of present invention, cutting system includes cutting knife and controls the control of the cutting knife action in the mould
Device, the controller control the cutting knife to act and cut off the thin slice waste material according to default control program.
In this embodiment, control cutting knife to act using controller, realize the automation excision of thin slice waste material, improve
The stability and production efficiency of working of plastics quality；And can be during die trial according to the material property of perforated plastic part, shape
Size and/or melt fill type duration etc. to debug the opening time of cutting knife and opening time, with the same of excision thin slice waste material
When, avoid producing such as the defects of crackle, burr, so as to ensure the superperformance of the product molded；And can be default by this
Control program input controller, so as to realize that the convenience that controller acts to cutting knife controls with accurate, it is easy to mass production.
According to one embodiment of present invention, in S104, the rear mold be provided with it is to be formed on the second layer
The convex portion of hole face, to be molded the first hole with the hole face to be formed on the second layer on the first layer；In S108
In, cutting system includes the cutting knife on mould before the rear mold or described second, the quantity of the cutting knife and institute in the mould
The quantity for stating hole to be formed on the second layer is equal.
Through hole for forming face on the first layer and the second layer of perforated plastic part finished product, i.e., on the first layer into
Type has the first hole, formed on the second layer and for the situation in the second hole of the first hole face, the cutting knife of cutting system can in mould
In rear mold, before being also arranged on second on mould；When installing cutting knife and cutting knife on mould before second with thin slice glue position just
During to setting, the edge of a knife diameter of cutting knife need to be increased additionally, make to be located at the center of Mo Shangjiao roads before second by tool rest, to ensure
Cutting knife smoothly acts and cuts off thin slice waste material.
According to one embodiment of present invention, in S104, on the first layer with hole to be formed on the second layer
The non-perforate of face opening position；In S108, cutting system includes being arranged on the cutting knife before described second on mould in the mould, described to cut
The quantity of knife is equal with the quantity in hole to be formed on the second layer.
For non-perforate on the first layer of perforated plastic part finished product, the forming hole only on the second layer of perforated plastic part finished product
Situation for, the cutting knife of cutting system need to be arranged on before second on mould in mould, and when cutting knife is set with thin slice glue position face, is cut
The edge of a knife diameter of knife need to be increased additionally, make to be located at the center of Mo Shangjiao roads before second by tool rest, to ensure that cutting knife smoothly moves
Make and cut off thin slice waste material.
According to one embodiment of present invention, in S106, one is provided with before described second between mould and the first layer
The thin slice glue position, mould is provided with a glue-feeder before described second, and the glue-feeder is correspondingly arranged with the thin slice glue position, with
The thin slice waste material and material head are formed at the thin slice glue position；Or, mould is provided with a glue-feeder before described second, it is described enter
Jiao Kou and the thin slice glue position stagger setting, to form the thin slice waste material at the thin slice glue position, at the glue-feeder
Form material head.
In this embodiment, can be by glue-feeder and thin slice glue position for needing to be molded the perforated plastic part in a hole
It is correspondingly arranged, also glue-feeder and thin slice glue position stagger setting for example, perforated plastic part can be located at for hole to be formed
The situation in centre, glue-feeder and thin slice glue position can be correspondingly arranged, the material head and thin slice waste material for making injection molding are integrated,
It is easy to process；, can be by glue-feeder and thin slice glue dislocation in the case of hole to be formed is located at the non-central position of perforated plastic part
Open up and put, cut off the material head at the thin slice waste material and glue-feeder at thin slice glue position after injection molding respectively, obtain weldless line, nothing
The working of plastics finished product with holes, hole of current mark.
According to one embodiment of present invention, in S106, one is provided with before described second between mould and the first layer
The thin slice glue position, multiple thin slice glue positions correspond with multiple holes to be formed on the second layer respectively, and described the
Mould is provided with a glue-feeder before two, and melt is flow in multiple thin slice glue positions respectively by the glue-feeder.
In this embodiment, for needing to be molded the perforated plastic part in multiple holes, a glue-feeder can be only set, melted
Material flows into mold cavity through glue-feeder and is sequentially filled multiple thin slice glue positions, makes melt and working of plastics body in thin slice glue position
It is connected as a single entity, avoids the melt in the filling process at hole to be formed from first shunting and conflux and caused weld bond again.
In the above embodiment, it is preferable that in S108, in the mould cutting system include it is more respectively with the second layer
On the one-to-one cutting knife in hole to be formed, sequential is completed according to filling of the melt in multiple thin slice glue positions, setting is simultaneously
Control and more the cutting knife is acted according to sequential；Or, the duration of completion is stuffed entirely with multiple thin slice glue positions according to melt,
Set and control and more the cutting knife while act.
In this embodiment, due to the time difference that melt is flow in each thin slice glue position, therefore can be according to melt multiple
The filling of thin slice glue position controls cutting knife sequentially to open according to sequential, reaches optimal excision shape with the melt in each thin slice glue position
Cut off during state, generation the defects of Crack prevention, burr；Certainly, also can all be filled out in multiple thin slice glue positions in melt
After the completion of filling, then control cutting knife to open and carry out while cut off the melt in multiple thin slice glue positions, so as to form no thin slice waste material, without molten
Wiring and the perforated plastic part finished product for meeting design requirement；And can be according in the shapes and sizes in hole to be formed, hole to be formed
The factors such as the thickness of melt control the lasting opening time of multiple cutting knifes, the opening times of multiple cutting knifes can with it is identical can also
It is different.
In the above-described embodiments, after using cutting system excision thin slice waste material in mould, cutting knife is resetted, for next time into
Type is ready, and then ejects the perforated plastic part finished product after cutting and thin slice waste material, obtains perforated plastic part finished product.
In any of the above-described embodiment, being molded the melt of the first layer includes PP (polypropylene), ABS (acrylic nitrile-butadienes two
Alkene-styrene), PC (makrolon), PMMA (polymethyl methacrylate), PS (polystyrene), one in PA (polyamide)
Kind or it is a variety of, be molded the second layer melt include PP, ABS, PC, PMMA, PS, PA in one or more, described first
Layer is realized with the second layer by way of hot melt adhesive to be connected.
In this embodiment, the material that the first layer of perforated plastic part and the second layer use can be PP materials, also may be used
To be the thermoplastics such as ABS, ABS+PC, PC, PMMA, PS, PA, the material of first layer and the second layer can be with identical, also not
Together, the color of material can be different, and the surface as that layer material of appearance ornamental pieces can contain various pearly-lustres or various metals
The aesthetic effect of texture, the common plastics part surface effect of pearly-lustre or metal-like can also be free from；First layer and the second layer
Between hot melt adhesive when passing through double-shot moulding connect as one, be connected firmly, convenient formation；Certainly, also can be first
Some architectural features are molded on layer and the second layer, the architectural feature for not influenceing appearance by these further strengthens both even
The fastness connect.
The embodiment of the second aspect of the invention provides a kind of forming method of perforated plastic part, including：S202 is accurate
Standby Double-color forming die, including：Rear mold, in one-shot forming with it is described after die combination first before mould, in post forming with
Mould before the second of die combination after described；S204, by mould before described first with it is described after die combination, the mould and described before described first
The first layer of perforated plastic part is molded between rear mold；Wherein, it is provided between mould and the rear mold before described first and described first
Thin slice glue position corresponding to hole to be formed on layer, the melt flowing in the thin slice glue position form what is be integrated with the first layer
Thin slice waste material；S206, by mould before described second with it is described after die combination, be molded before described second between mould and the first layer
The second layer of perforated plastic part；S208, the thin slice waste material is cut off using cutting system in mould, to be molded the on the first layer
One hole, obtain the perforated plastic part finished product that the first layer is integrated with the second layer.
The forming method for the perforated plastic part that the above embodiment of the present invention provides, provided with first aspect present invention embodiment
The forming method of perforated plastic part compare, the embodiment uses the forming method of upside-down mounting mould, and one layer be first molded is outward appearance dress
Gadget, one layer of aftershaping be the structural member coordinated with appearance ornamental pieces, mould structure is relatively complicated, but by it is above-mentioned into
Type method, the defects of can equally ensureing weldless line, current mark on the outer surface of appearance ornamental pieces, thus without by spray come
Cover weld bond and current mark, you can obtain good appearance, ensure that the exterior decorative effect of product product；Citing and
Speech, for electric cooker, the cover of electric pressure cooking saucepan and cover cosmetic sheet, by above-mentioned two shot mold by cover and cover
Cosmetic sheet is shaped to a part, one layer be first molded be cover cosmetic sheet, one layer of aftershaping be cover.
In addition, the forming method for the perforated plastic part that the above embodiment of the present invention provides also has following supplementary technology special
Sign：
According to one embodiment of present invention, cutting system includes cutting knife and controls the control of the cutting knife action in the mould
Device, the controller control the cutting knife to act and cut off the thin slice waste material according to default control program.
According to one embodiment of present invention, the first hole is formed on the first layer of the perforated plastic part, on the second layer
Form the second hole with the first hole face；In S206, it is being provided with and treating on the first layer on mould before described second
The convex portion of type hole face, to be molded the second hole with the hole face to be formed on the first layer on the second layer；
In S208, cutting system includes the cutting knife on mould before the rear mold or described second, the quantity of the cutting knife in the mould
It is equal with the quantity in hole to be formed on the first layer.
According to one embodiment of present invention, non-perforate on the second layer of the perforated plastic part, form on first layer
One or more holes；In S206, on the second layer with the non-perforate of face opening position in hole to be formed on the first layer；
In S208, cutting system includes the cutting knife being arranged in the rear mold in the mould, on the quantity of the cutting knife and the first layer
The quantity in hole to be formed is equal.
According to one embodiment of present invention, a hole is formed on the first layer；In S204, mould before described first
Be provided with a thin slice glue position between the rear mold, mould is provided with a glue-feeder before described first, the glue-feeder with
The thin slice glue position is correspondingly arranged, to form the thin slice waste material and material head at the thin slice glue position；Or, mould before described first
A glue-feeder, the glue-feeder and the thin slice glue position stagger setting are provided with, it is described to be formed at the thin slice glue position
Thin slice waste material, material head is formed at the glue-feeder.
According to one embodiment of present invention, multiple holes are formed on the first layer；In S204, mould before described first
It is provided with multiple thin slice glue positions between the rear mold, multiple thin slice glue positions are treated with multiple on the first layer respectively
Forming hole corresponds, and mould is provided with a glue-feeder before described first, and melt is flow to and multiple institutes respectively by the glue-feeder
State in thin slice glue position.
In the above embodiment, it is preferable that in S208, in the mould cutting system include it is more respectively with the first layer
On the one-to-one cutting knife in hole to be formed, sequential is completed according to filling of the melt in multiple thin slice glue positions, setting is simultaneously
Control and more the cutting knife is acted according to sequential；Or, the duration of completion is stuffed entirely with multiple thin slice glue positions according to melt,
Set and control and more the cutting knife while act.
In the above-described embodiments, after using cutting system excision thin slice waste material in mould, cutting knife is resetted, for next time into
Type is ready, and then ejects the perforated plastic part finished product after cutting and thin slice waste material, obtains perforated plastic part finished product.
Due to the forming method for the perforated plastic part that second aspect embodiment of the present invention provides, with first side of the invention
The forming method for the perforated plastic part that the embodiment in face provides, specific moulding process is roughly the same, and difference essentially consists in, and is first molded
One layer be structural member or appearance ornamental pieces, thus the perforated plastic part that is provided for second aspect embodiment of the present invention
Forming method, it will not be repeated here.
The embodiment of the third aspect of the invention provides a kind of perforated plastic part, for family expenses living electric apparatus, especially
It is to be used for cooking appliance, the perforated plastic part is made of the forming method of the perforated plastic part described in any of the above-described.
The perforated plastic part can be electric cooker, electric pressure cooking saucepan, bread producing machine, electromagnetic oven, Garment Steamer Machine, pan-fried burn-in, soya-bean milk
The various working of plastics containing dicoration effect on machine, kettle, water dispenser etc., as the cover and cover of double-shot moulding are decorated
The parts such as piece, the panel of double-shot moulding and panel decoration piece.
The embodiment of the fourth aspect of the invention provides a kind of cooking appliance, has modeling with holes on the cooking appliance
Materials and parts, the perforated plastic part are made of the forming method of the perforated plastic part described in any of the above-described.
The additional aspect and advantage of the present invention will become obvious in following description section, or the practice by the present invention
Recognize.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination accompanying drawings below to embodiment
Substantially and it is readily appreciated that, wherein：
Fig. 1 is the schematic flow sheet of the forming method of the perforated plastic part described in one embodiment of the invention；
Fig. 2 is the schematic flow sheet of the forming method of the perforated plastic part described in another embodiment of the present invention；
Fig. 3 is the dimensional structure diagram of the perforated plastic part described in one embodiment of the invention；
Fig. 4 is the dimensional structure diagram at another visual angle of perforated plastic part shown in Fig. 3；
Fig. 5 is the dimensional structure diagram for being molded the cover (i.e. first layer) of perforated plastic part shown in Fig. 3；
Fig. 6 is the dimensional structure diagram for being molded the cover (i.e. first layer) of perforated plastic part shown in Fig. 4；
Fig. 7 is the dimensional structure diagram for being molded the cover cosmetic sheet (i.e. the second layer) of perforated plastic part shown in Fig. 3；
Fig. 8 is the dimensional structure diagram for being molded the cover cosmetic sheet (i.e. the second layer) of perforated plastic part shown in Fig. 4；
Fig. 9 is the structural representation for the mould for being molded the perforated plastic part described in one embodiment of the invention；
Figure 10 is the structural representation for being molded the cover cosmetic sheet described in one embodiment of the invention；
Figure 11 is the structural representation for being molded cover and cover cosmetic sheet described in one embodiment of the invention.
Wherein, corresponding relations of the Fig. 3 into Figure 11 between reference and component names is：
1 perforated plastic part, 10 key holes, 11 covers (i.e. first layer), 111 first holes, 12 cover cosmetic sheets (i.e. second
Layer), 121 second holes, 122 thin slice glue positions, 123 glue-feeders, 21 rear molds, mould before 22 first, mould before 23 second, 24 cutting knifes.
Embodiment
It is below in conjunction with the accompanying drawings and specific real in order to be more clearly understood that the above objects, features and advantages of the present invention
Mode is applied the present invention is further described in detail.It should be noted that in the case where not conflicting, the implementation of the application
Feature in example and embodiment can be mutually combined.
Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still, the present invention may be used also
By using other be different from it is described here in a manner of implement, therefore, protection scope of the present invention is not by following public tool
The limitation of body embodiment.
The forming method and band of the perforated plastic part of 1 to Figure 11 description according to some embodiments of the invention with reference to the accompanying drawings
Hole working of plastics and cooking appliance.
The embodiment of first aspect present invention provides a kind of forming method of perforated plastic part, and the perforated plastic part includes
The first layer and aftershaping that are first molded and play a supportive role and the second layer played role in decoration, the present embodiment is to be first molded cover
Illustrated exemplified by the perforated plastic part of (i.e. first layer), aftershaping cover cosmetic sheet (i.e. the second layer).
As shown in figure 1, a kind of forming method for perforated plastic part that embodiment according to a first aspect of the present invention provides, bag
Include following steps：
S102, prepare Double-color forming die, including：Mould before rear mold 21, first combined in one-shot forming with rear mold 21
22nd, mould 23 before second combined in post forming with rear mold 21；
S104, mould 22 before first is combined with rear mold 21, be molded cover 11 (i.e. the between mould 22 and rear mold 21 before first
One layer)；
S106, mould 23 before second is combined with rear mold 21, be molded cover cosmetic sheet between mould 23 and cover 11 before second
12 (i.e. the second layers), are integrated between cover 11 and cover cosmetic sheet 12 by hot melt adhesive, wherein, mould 23 and cover before second
Thin slice glue position 122 corresponding with the hole to be formed in cover cosmetic sheet 12, the melt flowing in thin slice glue position 122 are provided between 11
Form the thin slice waste material being integrated with cover cosmetic sheet 12；
S108, thin slice waste material is cut off using cutting system in mould, with the forming hole in cover cosmetic sheet 12, obtain cover 11 with
The perforated plastic part finished product that cover cosmetic sheet 12 is integrated.
As shown in Figures 9 to 11, the side where rear mold 21 be dynamic model side, the place of mould 23 before mould 22 and second before first
Side is cover half side, and first and before first the combination forming of mould 22 goes out cover 11 to rear mold 21, then using the center line shown in Fig. 9 as axle
The heart rotates rear mold 21, rear mold 21 is combined again with mould before second 22, cover cosmetic sheet 12 is molded on cover 11；Wherein, such as
Shown in Figure 10 and Figure 11, it is adapted as being provided with key hole with the shape in hole to be formed at the hole to be formed of cover cosmetic sheet 12
Thin slice glue position 122, and glue-feeder 123 is provided with thin slice glue position 122, with after the completion of the shaping of cover cosmetic sheet 12, thin
The thin slice waste material being integrated with cover cosmetic sheet 12 is formed at piece glue position 122, is then cut off using the cutting knife 24 of cutting system in mould
The thin slice waste material, as shown in figure 11, the cutting knife 24 of cutting system is arranged in rear mold 21 in mould, it is illustrated that in upward arrow represent to cut
The direction of motion of knife, obtains working of plastics with holes in cover cosmetic sheet 12, weldless line, stream on the outer surface of cover cosmetic sheet 12
The defects of trace, thus without covering weld bond and current mark by spraying, you can obtain good appearance.
For example, as shown in Figures 3 to 8, it is first for electric cooker, the cover 11 of electric pressure cooking saucepan and cover cosmetic sheet 12
Shaping one layer be cover 11, one layer of aftershaping be cover cosmetic sheet 12, cover cosmetic sheet 12 primarily serves ornamental effect,
Cover 11 is the support part of the bottom of cover cosmetic sheet 12, is such as molded two Element Designs with same material into a part
Shaping, then whole part will lose otherness, the stereovision of moulding of color, and apparent visual effect is simple；And the present invention uses
Perforated plastic part 1 made of dual molding process, it is preferable that the use of cover cosmetic sheet 12 is exempted from spraying aesthetic plastics and is molded into
Type, cover 11 carries out injection molding using non-spraying aesthetic plastics of exempting from, and two parts have been incorporated into together during depanning, eliminate
The assembling of independent two parts, and the assembling structures such as shaping button bit, post are eliminated, so as to solve because button bit, post are isostructural
In the presence of and caused current mark；The feature of key hole 10 that must retain during Element Design is directed to simultaneously, glue, Mo Neire are entered using thin slice
Cutting process eliminate because hole, hole presence and caused by weld mark；And product-forming can be ensured by the difference of both materials
Stereovision and appearance.
Imitated without current mark, weldless trace especially suitable for being decorated with class external aesthetical on the achievable moulding surface of the present invention
The moulding surface flow marks of fruit and the elimination of weld bond.Foregoing class external aesthetical decorative effect, refer to using addition metal-powder
Or the working of plastics that the plastic material of metal-oxide powder is molded, the working of plastics have the effect of similar spraying/imitative spraying,
And then exempt from the purpose of spraying.
Embodiment one：
For forming the first hole 111, cover cosmetic sheet 12 on the cover 11 (i.e. first layer) of perforated plastic part finished product
The situation with the second hole 121 of the face of the first hole 111 is formed on (i.e. the second layer)：
In S104, convex portion corresponding with the hole to be formed on cover 11 is provided with rear mold 21, with cover 11 into
The first hole of type 111；
In S106, thin slice glue position 122 with the face of the first hole 111 is provided between mould 23 and cover 11 before second, with
The thin slice waste material being integrated with cover cosmetic sheet 12 is formed at thin slice glue position 122；
In S108, cutting system includes the cutting knife 24 on mould 23 before rear mold 21 or the second, the number of cutting knife 24 in mould
Amount is equal with the quantity in hole to be formed in cover cosmetic sheet 12, cuts off thin slice waste material simultaneously or according to sequential by cutting knife 24, obtains
The perforated plastic part finished product of through hole with face on cover 11 and cover cosmetic sheet 12.
Embodiment two：
For forming the second hole 121 in the cover cosmetic sheet 12 (i.e. the second layer) of perforated plastic part finished product, in cover
The situation in the unformed 121 corresponding hole of the second hole with cover cosmetic sheet 12 on 11 (i.e. first layers)：
In S104, be not provided with rear mold 21 with the face convex portion in hole to be formed in cover cosmetic sheet 12, i.e., in cover
The hole of the unformed hole face to be formed with cover cosmetic sheet 12 on 11；
In S106, provided with corresponding with the hole to be formed in cover cosmetic sheet 12 between mould 23 and cover 11 before second
Thin slice glue position 122, to form the thin slice waste material being integrated with cover cosmetic sheet 12 at thin slice glue position 122；
In S108, cutting system includes being arranged on the cutting knife 24 before second on mould 23, the quantity and cover of cutting knife 24 in mould
The quantity in hole to be formed is equal in cosmetic sheet 12, cuts off thin slice waste material simultaneously or according to sequential by cutting knife 24, obtains on cover 11
Non- perforate, only in cover cosmetic sheet 12 perforate perforated plastic part finished product.
Embodiment three：
Can be the cover in perforated plastic part finished product in the case of a hole is being formed on perforated plastic part finished product
First hole 111 is molded on 11, second hole 121 with the face of the first hole 111 is molded in cover cosmetic sheet 12；Also may be used
Be formed in cover cosmetic sheet 12 second hole 121, on cover 11 it is unformed with cover cosmetic sheet 12 on the
The hole of the face of two hole 121：
In S106, a thin slice glue position 122 is provided between mould 23 and cover 11 (i.e. first layer) before second, before second
Mould 23 is provided with a glue-feeder 123, and glue-feeder 123 is correspondingly arranged with thin slice glue position 122, to be formed at thin slice glue position 122
Thin slice waste material and material head；Or, a thin slice glue position 122 is provided between mould 23 and cover 11 (i.e. first layer) before second, second
Preceding mould 23 is provided with a glue-feeder 123, glue-feeder 123 and the stagger setting of thin slice glue position 122, with the shape at thin slice glue position 122
Flakiness waste material, material head is formed at glue-feeder 123.
For example, in the case of hole to be formed is located at the centre of perforated plastic part, can by glue-feeder 123 with it is thin
Piece glue position 122 is correspondingly arranged, and the material head and thin slice waste material for making injection molding are integrated, and are easy to process；It is located at for hole to be formed
The situation at the non-central position of perforated plastic part, glue-feeder 123 and the stagger setting of thin slice glue position 122 can be divided after injection molding
Material head at thin slice waste material and glue-feeder 123 that Qie Chu be at thin slice glue position 122, obtains weldless line, with holes, hole without current mark
Working of plastics finished product.
Example IV：
Can be the cover in perforated plastic part finished product in the case of multiple holes are being formed on perforated plastic part finished product
Multiple first holes 111 are molded on 11, multiple the second holes 121 with the face of the first hole 111 respectively are molded in cover cosmetic sheet 12；
Can also be formed in cover cosmetic sheet 12 multiple second holes 121, on cover 11 it is unformed with cover cosmetic sheet 12 on
The second hole 121 corresponding to hole：
In S106, multiple thin slice glue positions 122, multiple thin slices are provided with before second between mould 23 and cover 11 (i.e. first layer)
Glue position 122 is corresponded with multiple holes to be formed in cover cosmetic sheet 12 (i.e. the second layer) respectively, and mould 23 is provided with before second
One glue-feeder 123, melt are flow in multiple thin slice glue positions 122 respectively by glue-feeder 123；
In S108, in mould cutting system include it is more respectively with the hole to be formed one in cover cosmetic sheet 12 (i.e. the second layer)
Cutting knife 24 corresponding to one, sequential is completed according to filling of the melt in multiple thin slice glue positions 122, sets and controls more cutting knife 24
Acted according to sequential；Or, the duration of completion is stuffed entirely with multiple thin slice glue positions 122 according to melt, set and control more to cut
Knife 24 acts simultaneously.
For needing to be molded the perforated plastic part in multiple holes, a glue-feeder 123 can be only set, make melt through entering glue
Mouth 123 flows into mold cavities and is sequentially filled multiple thin slice glue positions 122, avoids the melt in the filling process at hole to be formed
First shunt and conflux and caused weld bond again；Because the time that melt is flow in each thin slice glue position 122 is different, therefore can be according to molten
Material controls cutting knife 24 sequentially to open in the filling of multiple thin slice glue positions 122 according to sequential, with the melt in each thin slice glue position 122
Cut off when reaching optimal excision state, generation the defects of Crack prevention, burr；Certainly, also can be in melt multiple
After the completion of being stuffed entirely with thin slice glue position 122, then control cutting knife 24 to open and carry out while cut off melting in multiple thin slice glue positions 122
Material, so as to form no thin slice waste material, weldless line and the perforated plastic part finished product for meeting design requirement；And can be according to be formed
The factor such as thickness of melt controls the lasting opening time of multiple cutting knifes 24 in the shapes and sizes in hole, hole to be formed, multiple
The opening time of cutting knife 24 can be the same or different.
In any of the above-described embodiment, it is preferable that the thickness of thin slice waste material is 0.5mm~4mm.Specifically, thin slice waste material
Thickness can be 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm or 4mm, the thickness of thin slice waste material is less than 0.5mm situation,
The mobility of melt, reduces shaping speed between melt and working of plastics in reduction thin slice glue position, while hardening by cooling is fast, unfavorable
In cutting, the plastic part surface finish of shaping is had an effect on；When the thickness of thin slice waste material is more than 4mm, then the life-span of cutting knife is influenceed,
The kerf quality in excision face is also reduced, easily causes serious tool marks and burr.
In any of the above-described embodiment, the cover 11 (i.e. first layer) and cover cosmetic sheet 12 (i.e. second of perforated plastic part
Layer) material that uses can be the thermoplastics such as PP materials or ABS, ABS+PC, PC, PMMA, PS, PA, cover
11 (i.e. first layers) and the material of cover cosmetic sheet 12 (i.e. the second layer) can be with identical, also different, and the color of material can be different,
Surface as that layer material of appearance ornamental pieces can be the aesthetic effect containing various pearly-lustres or various metal-likes, can also
It is free from the common plastics part surface effect of pearly-lustre or metal-like.
The embodiment of second aspect of the present invention provides a kind of forming method of perforated plastic part, and the perforated plastic part includes
The first layer and aftershaping that are first molded and play role in decoration and the second layer for supporting first layer, the present embodiment is with first forming surface
Lid cosmetic sheet (i.e. first layer), aftershaping cover (i.e. the second layer) perforated plastic part exemplified by illustrate.
As shown in Fig. 2 embodiment according to the second aspect of the invention provides a kind of shaping side of perforated plastic part
Method, comprise the following steps：
S202, prepare Double-color forming die, including：Rear mold, in one-shot forming with the first of rear die combination before mould, two
During secondary shaping with the second of rear die combination before mould；
S204, by the first preceding mould and rear die combination, cover cosmetic sheet (i.e. first is molded between mould and rear mold before first
Layer)；Wherein, thin slice glue position corresponding with the hole to be formed in cover cosmetic sheet is provided between mould and rear mold before first, flow to thin
Melt in piece glue position forms the thin slice waste material being integrated with cover cosmetic sheet；
S206, by the second preceding mould and rear die combination, cover, cover and face are molded between mould and cover cosmetic sheet before second
It is integrated between lid cosmetic sheet by hot melt adhesive；
S208, thin slice waste material is cut off using cutting system in mould, with the forming hole in cover cosmetic sheet, obtain cover and cover
The perforated plastic part finished product that cosmetic sheet is integrated.
Specifically, using perforated plastic part made of above-mentioned moulding process, one layer be first molded be appearance ornamental pieces, after into
One layer of type is the structural member coordinated with appearance ornamental pieces, on the outer surface of appearance ornamental pieces the defects of weldless line, current mark, because
Without covering weld bond and current mark by spraying, you can obtain good appearance；For example, such as Fig. 3 to Fig. 8 institutes
Show, for electric cooker, the cover 11 of electric pressure cooking saucepan and cover cosmetic sheet 12, one layer be first molded be cover cosmetic sheet 12, after into
One layer of type is cover 11.
The forming method for the perforated plastic part that the above embodiment of the present invention provides, the embodiment with one side of the invention
The forming method of the perforated plastic part of offer is roughly the same, and difference essentially consists in, and is upside-down mounting mould in the above embodiment of the present invention
Forming method, one layer be first molded are one layer of structural member to coordinate with appearance ornamental pieces of appearance ornamental pieces, aftershaping, thus
By the rational design of glue-feeder and thin slice glue position relative position on mould before first, reach the purpose for eliminating weld bond；Passing through will
The cutting knife of fervent system reaches on mould before rear mold or second simultaneously, and by controlling cutting knife sequential to open or open in mould
To the purpose of the thin slice waste material smoothly cut off after cover (i.e. the second layer) shaping in cover cosmetic sheet (i.e. first layer), so as to obtain
Obtain weldless line, without the good perforated plastic part of current mark, outward appearance, will not be repeated here.
The embodiment of the third aspect of the invention provides a kind of perforated plastic part 1, as shown in Figure 3 and Figure 4, for family
With living electric apparatus, in particular on cooking appliance, the perforated plastic part 1 is using the perforated plastic part described in any of the above-described
Forming method be made.
The perforated plastic part can be electric cooker, electric pressure cooking saucepan, bread producing machine, electromagnetic oven, Garment Steamer Machine, pan-fried burn-in, soya-bean milk
The various working of plastics containing dicoration effect on machine, kettle, water dispenser etc., as the cover and cover of double-shot moulding are decorated
The parts such as piece, the panel of double-shot moulding and panel decoration piece.
In one specific embodiment, as shown in Figure 3 and Figure 4, what is shown in figure is applied on electric cooker, electric pressure cooking saucepan
Perforated plastic part 1, the perforated plastic part 1 are that electric cooker, the cover 11 of electric pressure cooking saucepan and cover cosmetic sheet 12 are used into double-colored note
Modeling moulding process is combined as a whole；As shown in Fig. 5 to Fig. 8, so without being molded respectively on cover 11 and cover cosmetic sheet 12
Button bit, buckling position hole for assembling, i.e. cover 11 and cover cosmetic sheet 12 are connected as one by the way of hot melt adhesive, when
So, to ensure the fastness of both connections, also some architectural features can be molded on cover and cover cosmetic sheet, by these not
The architectural feature for influenceing appearance further strengthens the fastness of connection；For that must be protected on cover 11 and cover cosmetic sheet 12
The key hole 10 stayed, as shown in Figure 5 and Figure 6, the first hole 111 is molded on cover 11 using traditional injection moulding moulding process, such as
Shown in Fig. 7 and Fig. 8, using thin slice enter glue, in mould earnestly technique molded in cover cosmetic sheet 12 it is corresponding with the first hole 111
Second hole 121, to mold the key hole 10 of insertion on perforated plastic part finished product.
The embodiment of the fourth aspect of the invention provides a kind of cooking appliance (not shown), the cooking appliance
Upper to have perforated plastic part 1, the perforated plastic part 1 uses the forming method system of the perforated plastic part described in any of the above-described
Into.
In summary, the forming method of perforated plastic part provided in an embodiment of the present invention, is solved using two-shot molding process
Current mark caused by because of assembling structures such as shaping button bit, posts；Glue is entered using thin slice, earnestly technique is solved because of forming hole, hole in mould
The caused weld bond etc. structure, so that the defects of the outer surface no color differnece of product product, weld bond, current mark, it ensure that system
The exterior decorative effect of part product, and molding procedure simplifies, production efficiency is high.
In the description of the invention, term " multiple " refers to two or more.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean to combine at least one reality that specific features, structure, material or the feature that the embodiment or example describe are contained in the present invention
Apply in example or example.In this manual, identical embodiment or reality are not necessarily referring to the schematic representation of above-mentioned term
Example.Moreover, description specific features, structure, material or feature can in any one or more embodiments or example with
Suitable mode combines.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (13)
- A kind of 1. forming method of perforated plastic part, it is characterised in that including：S102, prepare Double-color forming die, including：Rear mold, in one-shot forming with it is described after die combination first before mould, two During secondary shaping with it is described after die combination second before mould；S104, by mould before described first with it is described after die combination, modeling with holes is molded between mould and the rear mold before described first The first layer of materials and parts；S106, by mould before described second with it is described after die combination, be molded before described second between mould and the first layer with holes The second layer of working of plastics, wherein, it is provided with and the hole to be formed on the second layer between mould and the first layer before described second Corresponding thin slice glue position, the melt flowing in the thin slice glue position form the thin slice waste material being integrated with the second layer；S108, the thin slice waste material is cut off using cutting system in mould, to be molded the second hole on the second layer, obtain described the One layer of perforated plastic part finished product being integrated with the second layer.
- 2. the forming method of perforated plastic part according to claim 1, it is characterised in thatIn S104, the rear mold is provided with the convex portion with the hole face to be formed on the second layer, with the first layer Upper shaping and the first hole of the hole face to be formed on the second layer；In S108, cutting system includes the cutting knife on mould before the rear mold or described second, the cutting knife in the mould Quantity it is equal with the quantity in hole to be formed on the second layer.
- 3. the forming method of perforated plastic part according to claim 1, it is characterised in thatIn S104, on the first layer with the non-perforate of face opening position in hole to be formed on the second layer；In S108, cutting system includes being arranged on the cutting knife before described second on mould, the quantity of the cutting knife and institute in the mould The quantity for stating hole to be formed on the second layer is equal.
- 4. the forming method of perforated plastic part according to claim 1, it is characterised in thatIn S106, a thin slice glue position is provided with before described second between mould and the first layer, before described second on mould Provided with a glue-feeder, the glue-feeder is correspondingly arranged with the thin slice glue position, described thin to be formed at the thin slice glue position Sheet waste material and material head；Or, the glue-feeder and the thin slice glue position stagger setting, it is described thin to be formed at the thin slice glue position Sheet waste material, material head is formed at the glue-feeder.
- 5. the forming method of perforated plastic part according to claim 1, it is characterised in thatIn S106, multiple thin slice glue positions, multiple thin slice glue are provided with before described second between mould and the first layer Position corresponds with multiple holes to be formed on the second layer respectively, and mould is provided with a glue-feeder, melt before described second It is flow to respectively in multiple thin slice glue positions by the glue-feeder；In S108, cutting system includes more being cut correspondingly with the hole to be formed on the second layer respectively in the mould Knife, sequential is completed according to filling of the melt in multiple thin slice glue positions, set and control and more the cutting knife is moved according to sequential Make；Or, the duration of completion is stuffed entirely with multiple thin slice glue positions according to melt, set and control how that the cutting knife is same When act.
- A kind of 6. forming method of perforated plastic part, it is characterised in that including：S202, prepare Double-color forming die, including：Rear mold, in one-shot forming with it is described after die combination first before mould, two During secondary shaping with it is described after die combination second before mould；S204, by mould before described first with it is described after die combination, modeling with holes is molded between mould and the rear mold before described first The first layer of materials and parts；Wherein, it is provided between mould and the rear mold before described first corresponding with the hole to be formed on the first layer Thin slice glue position, the melt that flow in the thin slice glue position forms the thin slice waste material being integrated with the first layer；S206, by mould before described second with it is described after die combination, be molded before described second between mould and the first layer with holes The second layer of working of plastics；S208, the thin slice waste material is cut off using cutting system in mould, to be molded the first hole on the first layer, obtain described the One layer of perforated plastic part finished product being integrated with the second layer.
- 7. the forming method of perforated plastic part according to claim 6, it is characterised in thatIn S206, mould is provided with convex portion with the hole face to be formed on the first layer before described second, with described the Two layers of upper shaping and the second hole of the hole face to be formed on the first layer；In S208, cutting system includes the cutting knife on mould before the rear mold or described second, the cutting knife in the mould Quantity it is equal with the quantity in hole to be formed on the first layer.
- 8. the forming method of perforated plastic part according to claim 6, it is characterised in thatIn S206, on the second layer with the non-perforate of face opening position in hole to be formed on the first layer；In S208, cutting system includes the cutting knife being arranged in the rear mold, the quantity of the cutting knife and described the in the mould The quantity in one layer of upper hole to be formed is equal.
- 9. the forming method of perforated plastic part according to claim 6, it is characterised in thatIn S204, a thin slice glue position is provided with before described first between mould and the rear mold, set before described first on mould There is a glue-feeder, the glue-feeder is correspondingly arranged with the thin slice glue position, to form the thin slice at the thin slice glue position Waste material and material head；Or, the glue-feeder and the thin slice glue position stagger setting, to form the thin slice at the thin slice glue position Waste material, material head is formed at the glue-feeder.
- 10. the forming method of perforated plastic part according to claim 6, it is characterised in thatIn S204, multiple thin slice glue positions, multiple thin slice glue positions are provided with before described first between mould and the rear mold Corresponded respectively with multiple holes to be formed on the first layer, mould is provided with a glue-feeder before described first, melt by The glue-feeder is flow in multiple thin slice glue positions respectively；In S208, cutting system includes more being cut correspondingly with the hole to be formed on the first layer respectively in the mould Knife, sequential is completed according to filling of the melt in multiple thin slice glue positions, set and control and more the cutting knife is moved according to sequential Make；Or, the duration of completion is stuffed entirely with multiple thin slice glue positions according to melt, set and control how that the cutting knife is same When act.
- 11. the forming method of perforated plastic part according to any one of claim 1 to 10, it is characterised in thatBeing molded the melt of the first layer includes the one or more in PP, ABS, PC, PMMA, PS, PA, is molded the second layer Melt include one or more in PP, ABS, PC, PMMA, PS, PA, the first layer and the second layer are viscous by heating The mode of conjunction realizes connection.
- 12. a kind of perforated plastic part, for family expenses living electric apparatus, it is characterised in that using such as any one of claim 1 to 11 The forming method of described perforated plastic part is made.
- 13. a kind of cooking appliance, there is perforated plastic part on the cooking appliance, it is characterised in that the perforated plastic part is adopted It is made of the forming method of the perforated plastic part as any one of claim 1 to 11.
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Application publication date: 20180406 |