CN111844582A - Continuous pressing and discharging equipment for color-invariant simulation flower blades - Google Patents
Continuous pressing and discharging equipment for color-invariant simulation flower blades Download PDFInfo
- Publication number
- CN111844582A CN111844582A CN202010670397.0A CN202010670397A CN111844582A CN 111844582 A CN111844582 A CN 111844582A CN 202010670397 A CN202010670397 A CN 202010670397A CN 111844582 A CN111844582 A CN 111844582A
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- China
- Prior art keywords
- roller
- flower
- furnace body
- continuous pressing
- color
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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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
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- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41G—ARTIFICIAL FLOWERS; WIGS; MASKS; FEATHERS
- A41G1/00—Artificial flowers, fruit, leaves, or trees; Garlands
- A41G1/02—Implements, apparatus, or machines for making artificial flowers, or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/04—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles using movable moulds
- B29C2043/043—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles using movable moulds rotating on their own axis without linear displacement
Abstract
The invention discloses continuous pressing and discharging equipment for color-invariant simulation flower blades, which comprises a rack, a furnace body, a rotary conveying chain, an upper die, a lower die and a collecting disc. A plurality of bases are fixed on the rotary conveying chain, a lower template is installed on each base, and a lower die is fixedly arranged on each lower template; a plurality of oil cylinders are sequentially arranged at the top of the furnace body along the conveying direction of the rotary conveying chain, and piston rods of the oil cylinders are connected with an upper die; a plurality of flower models and a plurality of cavities on the upper die and the lower die are pressed and formed in a one-to-one correspondence manner; the collecting tray is arranged below the furnace body, and parallel rollers are arranged in the collecting tray; the axes of the rotating shafts of the two rollers are arranged in parallel, and the rolling surfaces are abutted; the rolling surface of the roller is concave and is provided with a rolling groove. According to the invention, the upper die and the lower die are pressed and molded by using the oil cylinder designed by the furnace body, the pressed flower leaves enter the discharging screening system through the separation grid plate, and are extruded and screened by the parallel rollers, so that the continuous pressing of the flower leaves is realized, the pressing efficiency is greatly improved, and the integration of pressing and discharging collection is realized.
Description
Technical Field
The invention relates to the field of artificial flower production and manufacturing equipment, in particular to continuous pressing and discharging equipment for an invariable-color artificial flower blade.
Background
The artificial flower is also called artificial flower, silk flower and silk flower, and the artificial flower can not only keep fresh and beautiful for a long time, but also can be freely used according to seasons and requirements: the spring is arranged by people, summer is cool and convincing, a golden yellow object can be harvested in autumn, and winter can be warmed by a full-bodied scarlet; roses can be used for expressing love at any time, and peony can be picked up along with the land to transmit blessings. The unique appearance, the multi-pose and multi-modal modeling, the longer viewing period and the richer modeling skills are the strong reason for people to love the simulated flowers. In China, the artificial flowers have become a frequent article, whether on a beginning celebration, wedding feast, office and home environment, have the statue of the artificial flowers, and the sales volume of the artificial flowers is reported to increase at a rate of 40% every year.
Along with the increase of the demand of the artificial flowers, production equipment needs to be updated in a matching way, the existing flower piece pressing equipment cannot realize continuous pressing in the pressing process, the pressing efficiency is low, the yield is low, and the flower piece pressing equipment is not suitable for industrial production.
The other part of the existing pressing device can perform continuous pressing, but the uniformity of pressed products is poor, the pressing effect is not uniform, the product quality is poor, and the integration of pressing, discharging and collecting cannot be realized.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides continuous pressing and discharging equipment for non-discoloring simulation flower leaves.
In order to achieve the purpose, the invention provides the following technical scheme:
a continuous pressing and discharging device for color-invariant simulation flower blades comprises:
a frame;
the furnace body is arranged above the rack;
a rotary conveyor chain moving through the furnace body in a clockwise direction;
one end of the rotary conveying chain is provided with a feeding device, and the other end of the rotary conveying chain is provided with a demoulding device; a plurality of bases are fixed on the rotary conveying chain, a lower template is installed on each base, and a lower die is fixedly arranged on each lower template; a plurality of oil cylinders are sequentially arranged at the top of the furnace body along the conveying direction of the rotary conveying chain, piston rods of the oil cylinders extend downwards into the furnace body and are fixedly connected with an upper die, and the oil cylinders correspond to the bases one by one;
concave sliding blocks are respectively arranged on two sides of the upper die, a plurality of cavities are arranged in the area of the upper die between the two concave sliding blocks, and limiting holes are formed in the side edges of the two cavities;
grooves are formed in the sides of one surface, which is in contact with the upper die, of the lower die, and pneumatic rods are fixed at two ends inside the grooves; a pneumatic sliding rail is transversely fixed on the pneumatic rod and correspondingly clamped with the concave sliding block; a plurality of flower models are arranged in the area of the lower die between the two grooves, wherein the sides of the two flower models are provided with limiting columns; the limiting columns correspond to the limiting holes one by one, and the flower models correspond to the cavities one by one;
The blade continuous pressing and discharging equipment further comprises: the collecting tray is arranged below the furnace body, and the collecting tray is communicated with the furnace body through a separation grid plate; a first roller and a second roller which are parallel are arranged in the collecting tray; the axes of rotation of the first roller and the second roller are arranged in parallel, the first roller is connected with a power assembly outside the collecting tray, and the first roller and the second roller are connected by a synchronous belt in a transmission way; the rolling surfaces of the first roller and the second roller are abutted; the rolling surface of the first roller is concavely provided with a first rolling groove, and the rolling surface of the second roller is concavely provided with a second rolling groove matched with the first rolling groove.
Further, still be equipped with the sieve in the catch tray, the sieve is located the below of first cylinder and second cylinder, and both ends are fixed in the catch tray inner wall.
Furthermore, heating devices are respectively arranged on two sides of the base on the inner wall of the furnace body and used for heating the die.
Furthermore, the heating device adopts an electric heating tube.
Furthermore, a discharge hole is formed in one side of the collecting disc.
Further, a collection box is arranged below the sieve plate.
The invention has the beneficial effects that: according to the invention, flower leaf materials to be pressed and molds are continuously conveyed to a high-temperature furnace body by using a rotary conveying chain, the upper mold and the lower mold are pressed and formed by using an oil cylinder designed by the furnace body, the whole process is automatically and continuously carried out, the pressed flower leaves enter a discharge screening system through a separation grid plate, the pressed flower leaves are extruded and screened by parallel rollers, the flower leaves meeting the forming requirement are screened and discharged, the waste flower leaves are collected to a collection box through a screen plate for secondary recycling, the continuous pressing of the flower leaves is realized by the device, the pressing efficiency is greatly improved, and the integration of pressing and discharging collection is realized.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of a rotary conveyor chain structure according to the present invention;
FIG. 3 is a schematic view of the upper mold structure of the present invention;
FIG. 4 is a schematic view of the lower mold structure of the present invention;
FIG. 5 is a schematic view of the internal structure of the collecting tray according to the present invention;
FIG. 6 is a cross-sectional view of a collecting tray according to the present invention.
In the figure: 1-frame, 2-rotary conveying chain, 3-furnace body, 4-base, 5-heating device, 6-oil cylinder, 7-feeding device, 8-demoulding device, 9-lower template, 10-upper mould, 11-lower mould, 101-concave slide block, 102-cavity, 103-limiting hole, 111-pattern model, 112-limiting column, 113-groove, 114-pneumatic rod, 115-pneumatic slide rail, 12-separation grid plate, 13-collection tray, 131-first roller, 132-second roller, 1311-first roller groove, 1322-second roller groove, 133-discharge port, 134-sieve plate, 135-collection box, 136-power component and 137-synchronous belt.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1-6, the continuous pressing and discharging device for the color-invariant artificial flower blades of the present embodiment includes a frame 1, a rotary conveying chain 2, a furnace body 3, an upper mold 10, a lower mold 11, and a collecting tray 13.
The frame 1 is used for bearing the weight of the furnace body 3 and the upper and lower dies and is arranged at two sides of the conveying channel of the rotary conveying chain 2.
The furnace body 3 is arranged above the frame 1; the furnace body 3 provides a high temperature environment for press forming.
The rotary conveyor chain 2 moves through the furnace body 3 in a clockwise direction.
One end of the rotary conveying chain 2 is provided with a feeding device 7, and the other end is provided with a demoulding device 8; the feeding device 7 is used for feeding the flower and leaf materials to be pressed onto the conveying chain, the demolding device 8 unloads the formed flower and leaf from the mold and conveys the flower and leaf materials to the collecting tray 13 after the flower and leaf materials are pressed and formed, the rotary conveying chain 2 is fixedly provided with a plurality of bases 4, each base 4 is provided with a lower mold plate 9, and the lower mold plate 9 is fixedly provided with a lower mold 11; the top of the furnace body 3 is sequentially provided with a plurality of oil cylinders 6 along the conveying direction of the rotary conveying chain 2, piston rods of the oil cylinders 6 downwards extend into the furnace body 3 and are fixedly connected with an upper die 10, and the oil cylinders 6 correspond to the bases 4 one by one.
Two sides of the upper die 10 are respectively provided with a concave sliding block 101, the area of the upper die 10 between the two concave sliding blocks 101 is provided with a plurality of cavities 102, and the sides of the two cavities 102 are provided with limiting holes 103;
Grooves 113 are formed in the sides of one surface, which contacts the upper die 10, of the lower die 11, and pneumatic rods 114 are fixed at two ends inside the grooves 113; a pneumatic slide rail 115 is transversely fixed on the pneumatic rod 114, and the pneumatic slide rail 115 is correspondingly clamped with the concave slide block 101; a plurality of flower models 111 are arranged in the area of the lower die 11 between the two grooves 113, wherein the sides of the two flower models 111 are provided with limiting columns 112; the limiting columns 112 correspond to the limiting holes 103 one by one, and the flower models 111 correspond to the cavities 102 one by one.
The collecting tray 13 is arranged below the furnace body 3, and the collecting tray 13 is communicated with the furnace body 3 through a separation grid plate 12; a first roller 131 and a second roller 132 which are arranged in parallel are arranged in the collecting tray 13; the rotating axes of the first roller 131 and the second roller 132 are arranged in parallel, the first roller 131 is connected with a power assembly 136 outside the collecting tray 13, and the first roller 131 and the second roller 132 are in transmission connection by a synchronous belt 137; the rolling surfaces of the first roller 131 and the second roller 132 are abutted; the rolling surface of the first roller 131 is concavely provided with a first rolling groove 1311, and the rolling surface of the second roller 132 is concavely provided with a second rolling groove 1322 for matching with the first rolling groove 1311.
The collecting tray 13 is further provided with a screen plate 14, the screen plate 14 is located below the first roller 131 and the second roller 132, and two ends of the screen plate 14 are fixed on the inner wall of the collecting tray 13. A collecting box 135 is arranged below the sieve plate 14, and the sieve plate 14 is used for filtering the waste materials and falls into the collecting box 135 below for secondary utilization.
And the two sides of the base 4 on the inner wall of the furnace body 3 are respectively provided with a heating device 5, and the heating devices 5 are used for heating the die. One side of the collecting tray 13 is provided with a discharge hole 133.
During specific work, the heating device 5 on the inner wall of the furnace body 3 heats the temperature in the furnace body 3 to a forming temperature, at the moment, the rotary conveying chain 2 moves, the feeding device 7 feeds flower and leaf materials to be pressed to the lower die 11 fixed by the lower template 9, then the rotary conveying chain 2 conveys the lower die 11 to be pressed to the furnace body 3, a plurality of upper dies 10 corresponding to the lower dies 11 are arranged above the furnace body 3, the upper dies 10 are pushed by the oil cylinder 6 to press the upper dies and the lower dies, and the cavities 102 on the upper dies 10 and the flower and leaf dies 111 of the lower dies 11 are formed in a matched mode. The stopper posts 112 are inserted into the stopper holes 1033 to be fixed. The flower models 111 and the cavities 102 can be replaced according to different flowers and leaves, so that the integral mixing molding of different flowers and leaves is met. During molding, the female slider 101 compresses the pneumatic rod 114 into the groove 113 by pressure, and the female slider 101 and the pneumatic slide 115 are engaged and fixed, and during demolding, the pneumatic rod 114 pushes the female slider 101 open, and the female slider 101 and the pneumatic slide 115 are separated to complete demolding.
After the press forming and demolding, the demolding device 8 unloads the formed flower leaves from the mold and conveys the flower leaves to the separation grid plate 12, the separation grid plate 12 is communicated with the collection tray 13, the formed flower leaves fall onto the first roller 131 and the second roller 132 which are arranged in parallel through the separation grid plate 12, the two rollers perform extrusion rolling under the action of the power assembly 136 matched with the synchronous belt 137, the formed flower leaves respectively enter the respective first rolling groove 1311 and the second rolling groove 1322 in the rolling extrusion process, fall onto the sieve plate 134 through rolling screening, and finally are collected through the discharge port 133, and the fragments which do not meet the requirements are screened through the sieve plate 134 and fall into the collection box 135 for secondary utilization.
In conclusion, the flower leaf continuous pressing device has the advantages that flower leaf materials to be pressed and molds are continuously conveyed into a high-temperature furnace body by the aid of the rotary conveying chain, the upper mold and the lower mold are pressed and formed by the aid of the oil cylinders designed by the furnace body, the whole process is automatically and continuously carried out, the pressed flower leaves enter the discharging and screening system through the separation grid plate, the waste flower leaves are extruded and screened by the parallel rollers, the formed flower leaves are screened and discharged, the waste flower leaves are collected to the collecting box through the screen plate for secondary recycling, the continuous pressing of the flower leaves is realized by the flower leaf continuous pressing device, the pressing efficiency is greatly improved, and the integration of pressing and discharging and.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. A continuous pressing and discharging device for color-invariant simulation flower blades comprises:
a frame (1);
a furnace body (3) arranged above the frame (1);
a rotary conveyor chain (2) moving through the furnace body (3) in a clockwise direction;
the device is characterized in that one end of the rotary conveying chain (2) is provided with a feeding device (7), and the other end is provided with a demoulding device (8); a plurality of bases (4) are fixed on the rotary conveying chain (2), a lower template (9) is installed on each base (4), and a lower die (11) is fixedly arranged on each lower template (9); a plurality of oil cylinders (6) are sequentially arranged at the top of the furnace body (3) along the conveying direction of the rotary conveying chain (2), piston rods of the oil cylinders (6) extend downwards into the furnace body (3) and are fixedly connected with an upper die (10), and the oil cylinders (6) correspond to the bases (4) one by one;
concave sliding blocks (101) are respectively arranged on two sides of the upper die (10), a plurality of cavities (102) are arranged in the area, located between the two concave sliding blocks (101), of the upper die (10), and limiting holes (103) are formed in the side edges of the two cavities (102);
Grooves (113) are formed in the side of one side, in contact with the upper die (10), of the lower die (11), and pneumatic rods (114) are fixed at two ends inside the grooves (113); a pneumatic sliding rail (115) is transversely fixed on the pneumatic rod (114), and the pneumatic sliding rail (115) is correspondingly clamped with the concave sliding block (101); a plurality of flower models (111) are arranged in the area, located between the two grooves (113), of the lower die (11), and limiting columns (112) are arranged on the sides of the two flower models (111); the limiting columns (112) correspond to the limiting holes (103) one by one, and the flower models (111) correspond to the cavities (102) one by one;
the blade continuous pressing and discharging equipment also comprises a collecting tray (13) which is arranged below the furnace body (3), and the collecting tray (13) is communicated with the furnace body (3) through a separation grid plate (12); a first roller (131) and a second roller (132) which are arranged in parallel are arranged in the collecting tray (13); the rotating axes of the first roller (131) and the second roller (132) are arranged in parallel, the first roller (131) is connected with a power assembly (136) outside the collecting tray (13), and the first roller (131) and the second roller (132) are in transmission connection through a synchronous belt (137); the rolling surfaces of the first roller (131) and the second roller (132) are abutted; the rolling surface of the first roller (131) is concavely provided with a first rolling groove (1311), and the rolling surface of the second roller (132) is concavely provided with a second rolling groove (1322) matched with the first rolling groove (1311).
2. The continuous pressing and discharging equipment for the invariable-color simulated flower leaves as claimed in claim 1 is characterized in that a sieve plate (14) is further arranged in the collection tray (13), the sieve plate (14) is positioned below the first roller (131) and the second roller (132), and both ends of the sieve plate are fixed on the inner wall of the collection tray (13).
3. The continuous pressing and discharging equipment for the color-invariant artificial flower blades according to claim 1, wherein heating devices (5) are respectively arranged on two sides of the base (4) on the inner wall of the furnace body (3), and the heating devices (5) are used for heating a die.
4. The continuous pressing and discharging equipment for the unchanged-color simulated flower leaves as claimed in claim 3, characterized in that the heating device (5) adopts an electric heating tube.
5. A continuous pressing and discharging device for invariable color artificial flower blades according to claim 1, characterized in that one side of the collecting tray (13) is provided with a discharging hole (133).
6. A continuous pressing and discharging equipment for invariable color artificial flower blades according to claim 2, characterized in that a collection box (135) is arranged below the sieve plate (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010670397.0A CN111844582A (en) | 2020-07-13 | 2020-07-13 | Continuous pressing and discharging equipment for color-invariant simulation flower blades |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010670397.0A CN111844582A (en) | 2020-07-13 | 2020-07-13 | Continuous pressing and discharging equipment for color-invariant simulation flower blades |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111844582A true CN111844582A (en) | 2020-10-30 |
Family
ID=72984804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010670397.0A Withdrawn CN111844582A (en) | 2020-07-13 | 2020-07-13 | Continuous pressing and discharging equipment for color-invariant simulation flower blades |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111844582A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113372690A (en) * | 2021-06-22 | 2021-09-10 | 惠州北方树工艺品有限公司 | Flame-retardant full-biodegradable plastic and preparation method and application thereof |
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| TW200500194A (en) * | 2003-02-11 | 2005-01-01 | S C Johnson Home Storage Inc | Method of producing a processing substrate |
| CN207370161U (en) * | 2017-10-16 | 2018-05-18 | 张家界富源仿真花有限公司 | For manufacturing the mold of discoloration artificial flowers |
| CN207614795U (en) * | 2017-10-31 | 2018-07-17 | 夹江县盛世东方陶瓷有限公司 | A kind of powder pressing device |
| CN207772242U (en) * | 2017-12-28 | 2018-08-28 | 晋江凯燕新材料科技有限公司 | A kind of mobile continuous compression molding device of brake block |
| CN208305554U (en) * | 2018-06-07 | 2019-01-01 | 张家界富源仿真花有限公司 | Extrusion equipment is used in a kind of production of artificial flowers petal |
| CN208789018U (en) * | 2018-09-18 | 2019-04-26 | 临澧芷兰仿真花有限公司 | A kind of artificial flowers injection molding machine safety device |
| CN210880840U (en) * | 2019-09-30 | 2020-06-30 | 徐州赫博包装有限公司 | Leftover material recovery device for plastic blow molding production |
-
2020
- 2020-07-13 CN CN202010670397.0A patent/CN111844582A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200500194A (en) * | 2003-02-11 | 2005-01-01 | S C Johnson Home Storage Inc | Method of producing a processing substrate |
| CN207370161U (en) * | 2017-10-16 | 2018-05-18 | 张家界富源仿真花有限公司 | For manufacturing the mold of discoloration artificial flowers |
| CN207614795U (en) * | 2017-10-31 | 2018-07-17 | 夹江县盛世东方陶瓷有限公司 | A kind of powder pressing device |
| CN207772242U (en) * | 2017-12-28 | 2018-08-28 | 晋江凯燕新材料科技有限公司 | A kind of mobile continuous compression molding device of brake block |
| CN208305554U (en) * | 2018-06-07 | 2019-01-01 | 张家界富源仿真花有限公司 | Extrusion equipment is used in a kind of production of artificial flowers petal |
| CN208789018U (en) * | 2018-09-18 | 2019-04-26 | 临澧芷兰仿真花有限公司 | A kind of artificial flowers injection molding machine safety device |
| CN210880840U (en) * | 2019-09-30 | 2020-06-30 | 徐州赫博包装有限公司 | Leftover material recovery device for plastic blow molding production |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113372690A (en) * | 2021-06-22 | 2021-09-10 | 惠州北方树工艺品有限公司 | Flame-retardant full-biodegradable plastic and preparation method and application thereof |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20201030 |
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| WW01 | Invention patent application withdrawn after publication |