CN112519149A - Mechanical pneumatic plastic bowl easy-demoulding injection mold - Google Patents

Mechanical pneumatic plastic bowl easy-demoulding injection mold Download PDF

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Publication number
CN112519149A
CN112519149A CN202011470477.8A CN202011470477A CN112519149A CN 112519149 A CN112519149 A CN 112519149A CN 202011470477 A CN202011470477 A CN 202011470477A CN 112519149 A CN112519149 A CN 112519149A
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China
Prior art keywords
permanent magnet
groove
mold
magnet block
outer mold
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Pending
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CN202011470477.8A
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Chinese (zh)
Inventor
王菲
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Cao Jun
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Wuhan Wenruixi Technology Co ltd
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Priority to CN202011470477.8A priority Critical patent/CN112519149A/en
Publication of CN112519149A publication Critical patent/CN112519149A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/40—Removing or ejecting moulded articles
    • B29C45/4005—Ejector constructions; Ejector operating mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/2602—Mould construction elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/72—Heating or cooling
    • B29C45/73—Heating or cooling of the mould
    • B29C45/7312—Construction of heating or cooling fluid flow channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7132—Bowls, Cups, Glasses

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

The invention discloses a mechanical pneumatic plastic bowl easy-demolding injection mold which comprises a base plate, wherein an outer mold is arranged on the upper end face of the base plate, a movable plate is arranged on the upper end face of the base plate through a telescopic mechanism, an inner mold matched with the outer mold is arranged on the lower end face of the movable plate, and a second permanent magnet is arranged at the lower end of the inner mold. According to the invention, the first permanent magnet, the second permanent magnet and the return spring are arranged, and the magnetic repulsion force between the first permanent magnet and the second permanent magnet is utilized, so that the product molding is not influenced during injection molding, and the product is automatically pushed for a certain time during product demolding, thereby improving the product demolding efficiency.

Description

Mechanical pneumatic plastic bowl easy-demoulding injection mold
Technical Field
The invention relates to the technical field of plastic bowl processing equipment, in particular to a mechanical pneumatic type plastic bowl easy-demoulding injection mould.
Background
Polypropylene is one of important general plastics, belongs to the fastest-developing variety from both absolute quantity and application breadth and depth, and has the characteristics of no color, no odor, no toxicity and the like, so the polypropylene is widely applied to the production of clothes, medical instruments, chemical containers and the like, and is also applied to food, medicine packaging and the like.
As food grade plastics, a plurality of polypropylene plastic bowls are available on the market, and are widely popular according to the characteristics of heat resistance, light weight, falling resistance and the like, the traditional plastic bowl is mainly produced by injection molding through a mold, however, the plastic bowl is complex in shape, large in specific surface area, large in adsorption force between a product and the mold, low in working efficiency, complex in process and resource waste due to the fact that manual or mechanical assistance is often needed for demolding after injection molding is finished.
Disclosure of Invention
The invention aims to solve the defects that when the traditional plastic bowl injection molding equipment in the prior art is used, separate demolding auxiliary equipment is needed and the process is complicated, and provides the mechanical pneumatic plastic bowl injection mold easy to demold.
In order to achieve the purpose, the invention adopts the following technical scheme:
the mechanical pneumatic plastic bowl easy-demolding injection mold comprises a base plate, wherein an outer mold is arranged on the upper end face of the base plate, a movable plate is mounted on the upper end face of the base plate through a telescopic mechanism, an inner mold matched with the outer mold is mounted on the lower end face of the movable plate, and a second permanent magnet block is mounted at the lower end of the inner mold;
the heat conduction groove is formed in the middle of the bottom wall in the die cavity of the outer die, the notch of the heat conduction groove is fixedly connected with a heat conduction plate in a sealing mode, a piston plate and two piston plates are connected in the heat conduction groove in a sliding mode in a symmetrical mode, a sealing space formed by the piston plate and the heat conduction groove is a driving area, a driving agent is filled in the driving area, one side, away from the driving area, of each piston plate is a driven area, an air inlet pipe is communicated between the driven area and the outside, placing grooves are symmetrically formed in the outer die relative to the heat conduction groove, elastic air bags are arranged in the placing grooves, exhaust pipes are communicated between the driven area and the elastic air bags in positions corresponding to the placing grooves, and a plurality of ejection mechanisms matched with the elastic air bags and the second permanent magnet blocks are evenly arranged on the bottom wall of.
Preferably, the side wall of the outer mold is provided with an injection pipe communicated with the mold cavity of the outer mold, and a cooling pipe is wound in the outer mold relative to the mold cavity.
Preferably, the ejection mechanism comprises an accommodating groove vertically formed in the inner bottom wall of the outer mold cavity, the inner bottom wall of the accommodating groove is elastically connected with a first permanent magnet through a return spring, the first permanent magnet is in sliding connection with the accommodating groove in a sealing manner, the magnetic poles of one side of the first permanent magnet opposite to the magnetic poles of the second permanent magnet are the same, an air guide pipe is formed in the first permanent magnet, and a communicating pipe is communicated between the elastic air bag and the groove wall of the accommodating groove.
Preferably, the air duct comprises a first horizontal groove, a second horizontal groove and a vertical groove, wherein the first horizontal groove and the second horizontal groove are horizontally formed in the side wall of the first permanent magnet, the vertical groove is vertically formed in the first permanent magnet, and the vertical groove is communicated with the two ends of the first horizontal groove and the second horizontal groove.
Preferably, a first check valve and a second check valve are respectively installed in the air inlet pipe and the air outlet pipe.
The invention has the beneficial effects that:
1. according to the invention, the first permanent magnet, the second permanent magnet and the return spring are arranged, and the magnetic repulsion force between the first permanent magnet and the second permanent magnet is utilized, so that the product molding is not influenced during injection molding, and the product is automatically pushed for a certain time during product demolding, thereby improving the product demolding efficiency.
2. In the invention, the driving agent is arranged, so that the elastic air bag is stored in the process of die assembly and injection molding of a product, and the elastic potential energy of the elastic air bag is automatically released to the product during cooling and demolding, thereby further improving the demolding efficiency of the product.
Drawings
FIG. 1 is a schematic structural view of a mechano-pneumatic plastic bowl easy-demolding injection mold according to the present invention;
FIG. 2 is an enlarged view taken at A in FIG. 1;
FIG. 3 is a schematic view of a part of the structure of the mechanical pneumatic plastic bowl easy-demolding injection mold according to the present invention;
fig. 4 is an enlarged view at B in fig. 3.
In the figure: the heat-conducting plate comprises a base plate 1, an outer die 2, a telescopic mechanism 3, a movable plate 4, an inner die 5, an injection molding injection pipe 6, a cooling pipe 7, a heat-conducting groove 8, a placing groove 9, a heat-conducting plate 10, a piston plate 11, an air inlet pipe 12, an elastic air bag 13, an exhaust pipe 14, a storage groove 15, a return spring 16, a first permanent magnet 17, an air guide pipe 18, a communicating pipe 19 and a second permanent magnet 20.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-4, the mechanical pneumatic plastic bowl easy-demoulding injection mold comprises a substrate 1, wherein an outer mold 2 is arranged on the upper end surface of the substrate 1, an injection pipe 6 communicated with a mold cavity of the outer mold 2 is arranged on the side wall of the outer mold 2, a cooling pipe 7 is wound in the outer mold 2 relative to the mold cavity, a movable plate 4 is arranged on the upper end surface of the substrate 1 through a telescopic mechanism 3, an inner mold 5 matched with the outer mold 2 is arranged on the lower end surface of the movable plate 4, and a second permanent magnet block 20 is arranged inside the lower end of the inner mold 5;
the middle part of the bottom wall in the die cavity of the outer die 2 is provided with a heat conducting groove 8, the notch of the heat conducting groove 8 is fixedly connected with a heat conducting plate 10 in a sealing way, the heat conducting plate 10 can rapidly conduct the temperature in the die cavity into the heat conducting groove 8, the heat conducting groove 8 is internally connected with piston plates 11 in a sealing way in a sliding way in a symmetrical way, the sealing space formed by the two piston plates 11 and the heat conducting groove 8 is a driving area, the driving area is filled with low-boiling-point evaporating liquid as a driving agent, the sealing space formed by one side of the piston plate 11, which is far away from the driving area, and the heat conducting groove 8 is a driven area, an air inlet pipe 12 is communicated between each driven area and the outside, a first one-way valve is installed in the air inlet pipe 12, the first one-way valve only allows outside gas or liquid to enter the driven area through the air inlet pipe 12, the placing grooves 9 are symmetrically arranged, the exhaust pipe 12 only allows gas or liquid in the driven area to enter the elastic air bag 13 through the exhaust pipe 14, and a plurality of ejection mechanisms matched with the elastic air bag 13 and the second permanent magnet blocks 20 are uniformly arranged on the bottom wall of the cavity of the outer die 2.
In the invention, the ejection mechanism comprises a containing groove 15 vertically arranged on the inner bottom wall of the cavity of the outer die 2, the inner bottom wall of the containing groove 15 is elastically connected with a first permanent magnet 17 through a return spring 16, the first permanent magnet 17 is connected with the containing groove 15 in a sealing and sliding way, a limit ring (not shown in the figure) is horizontally arranged on the inner wall of the containing groove 15, the lower limit position of the first permanent magnet 17 can be limited through the limit ring, thereby ensuring that the upper end surface of the first permanent magnet 17 is level with the inner bottom wall of the cavity of the outer die 2 when the first permanent magnet 17 is positioned at the lower limit position, the magnetic poles at one side of the first permanent magnet 17 opposite to a second permanent magnet 20 are the same, an air duct 18 is arranged in the first permanent magnet 17, a communicating pipe 19 is communicated between an elastic air bag 13 and the groove wall of the containing groove 15, the air duct 18 comprises a first horizontal groove, a second horizontal groove and a vertical groove which are horizontally arranged on the side wall of the first permanent magnet 17, and the vertical groove is communicated with the two ends of the first horizontal groove and the second horizontal groove far away from the side wall of the first permanent magnet 17, and the first horizontal groove is positioned above the second horizontal groove.
The invention can be illustrated by the following operating modes: as shown in fig. 1, initially, under the action of the elastic force of the return spring 16, the upper end of each first permanent magnet 17 extends to the upper side of the corresponding receiving slot 15, at this time, the communication position of the communication pipe 19 and the slot wall of the receiving slot 15 is relatively communicated with the notch of the second horizontal slot, and the first horizontal slot is located above the bottom wall of the die cavity;
when the die is closed, the telescopic mechanism 3 drives the movable plate 4 and the inner die 5 to synchronously move downwards, the distance between the first permanent magnet 17 and the second permanent magnet 20 is gradually reduced, the magnetic repulsion force between the first permanent magnet 17 and the second permanent magnet 20 is gradually enhanced, the first permanent magnet 17 is gradually accommodated in the accommodating groove 15 and compresses the reset spring 16, the communication position of the communication pipe 19 and the groove wall of the accommodating groove 15 is positioned between the first horizontal groove and the second horizontal groove, the communication pipe 19 is blocked by the first permanent magnet 17, then the injection pipe 6 is used for injecting hot-melt raw materials into the die cavity, the temperature in the die cavity is quickly raised, the temperature in the driving area is quickly raised to reach the boiling point of the driving agent, the driving agent is quickly gasified to push the two piston plates 11 to be away from each other and extrude the corresponding driven area, the gas in the driven area enters the corresponding elastic air bag 13 through the exhaust pipe 14, and the communication pipe 19 is blocked, the elastic air bag 13 is rapidly expanded;
when the injection molding is finished and the injection molding is carried out through the cooling pipe 7, the temperature in the mold cavity is rapidly reduced, the temperature in the heat conducting groove 8 is rapidly reduced to be lower than the boiling point of the driving agent, the driving agent is rapidly liquefied, negative pressure generated in the driving area drives the two piston plates 11 to approach each other, outside gas enters the driven area through the gas inlet pipe 12 to supplement gas for next use, when the mold is opened, the movable plate 4 is driven by the telescopic mechanism 3 to move upwards to be separated from the inner mold 5 and the outer mold 2, the magnetic repulsion force between the first permanent magnet 17 and the second permanent magnet 20 is reduced, the first permanent magnet 17 moves upwards to eject the accommodating groove 15 to reset under the elastic action of the reset spring 16, the first permanent magnet 17 can eject a finished product, meanwhile, the communicating pipe 19 is communicated with the second horizontal groove along with the movement of the first permanent magnet 17, and high-pressure gas in the elastic air bag 13 is ejected into the mold cavity through the communicating pipe 19 and the gas, thereby further improving the demoulding efficiency of the product.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.

Claims (5)

1.一种机械气动式塑料碗易脱模注塑模具，包括基板(1)，其特征在于，所述基板(1)上端面设有外模具(2)，所述基板(1)上端面通过伸缩机构(3)安装有活动板(4)，所述活动板(4)下端面安装有与外模具(2)配合的内模具(5)，所述内模具(5)下端安装有第二永磁块(20)；1. A mechanical pneumatic type plastic bowl easy-release injection mold, comprising a base plate (1), characterized in that the upper end face of the base plate (1) is provided with an outer mold (2), and the upper end face of the base plate (1) passes through The telescopic mechanism (3) is provided with a movable plate (4), an inner mold (5) matched with the outer mold (2) is installed on the lower end surface of the movable plate (4), and a second mold (5) is installed at the lower end of the inner mold (5). permanent magnet block (20); 所述外模具(2)的模腔内底壁中部开设有导热槽(8)，所述导热槽(8)的槽口处密封固定连接有导热板(10)，所述导热槽(8)内对称密封滑动连接有活塞板(11)，两个所述活塞板(11)与导热槽(8)共同组成的密封空间为驱动区，所述驱动区内填充有驱动剂，所述活塞板(11)远离驱动区一侧与导热槽(8)组成的密封空间为从动区，每个所述从动区与外界之间均连通设有进气管(12)，所述外模具(2)内关于导热槽(8)对称开设有放置槽(9)，每个所述放置槽(9)内均设有弹性气囊(13)，位置对应的所述从动区与弹性气囊(13)之间连通设有排气管(14)，所述外模具(2)模腔底壁均匀设有多个与弹性气囊(13)以及第二永磁块(20)配合的顶出机构。A heat-conducting groove (8) is provided in the middle of the inner bottom wall of the mold cavity of the outer mold (2), and a heat-conducting plate (10) is sealed and fixedly connected to the groove of the heat-conducting groove (8), and the heat-conducting groove (8) A piston plate (11) is slidably connected with an inner symmetrical seal, and a sealed space formed by the two piston plates (11) and the heat conduction groove (8) is a driving area, the driving area is filled with a driving agent, and the piston plate (11) The sealed space formed by the side away from the driving area and the heat conduction groove (8) is a driven area, and an air intake pipe (12) is communicated between each of the driven areas and the outside world. The outer mold (2) ) is provided with placement grooves (9) symmetrically about the heat conduction groove (8), each of the placement grooves (9) is provided with an elastic air bag (13), the driven area corresponding to the position and the elastic air bag (13) An exhaust pipe (14) is communicated therebetween, and the bottom wall of the cavity of the outer mold (2) is evenly provided with a plurality of ejection mechanisms that cooperate with the elastic airbag (13) and the second permanent magnet block (20). 2.根据权利要求1所述的一种机械气动式塑料碗易脱模注塑模具，其特征在于，所述外模具(2)侧壁设有与外模具(2)的模腔连通的注塑射管(6)，所述外模具(2)内关于模腔绕设有冷却管(7)。2. A kind of mechanical pneumatic type plastic bowl easy demoulding injection mold according to claim 1, characterized in that, the side wall of the outer mold (2) is provided with an injection mold that communicates with the cavity of the outer mold (2). A tube (6), a cooling tube (7) is arranged in the outer mould (2) around the mould cavity. 3.根据权利要求1所述的一种机械气动式塑料碗易脱模注塑模具，其特征在于，所述顶出机构包括外模具(2)模腔内底壁上竖直开设的收纳槽(15)，所述收纳槽(15)内底壁通过复位弹簧(16)弹性连接有第一永磁块(17)，且第一永磁块(17)与收纳槽(15)密封滑动连接，所述第一永磁块(17)与第二永磁块(20)相对的一侧磁极相同，所述第一永磁块(17)内开设有导气管(18)，所述弹性气囊(13)与收纳槽(15)的槽壁之间连通设有连通管(19)。3. A mechanical pneumatic plastic bowl easy-release injection mold according to claim 1, characterized in that, the ejection mechanism comprises a receiving groove (2) vertically opened on the inner bottom wall of the outer mold (2). 15), the inner bottom wall of the receiving groove (15) is elastically connected with a first permanent magnet block (17) through a return spring (16), and the first permanent magnet block (17) is sealed and slidingly connected with the receiving groove (15), The first permanent magnet block (17) and the second permanent magnet block (20) have the same magnetic pole on the opposite side, an air guide tube (18) is opened in the first permanent magnet block (17), and the elastic airbag ( 13) A communication pipe (19) is provided in communication with the groove wall of the receiving groove (15). 4.根据权利要求3所述的一种机械气动式塑料碗易脱模注塑模具，其特征在于，所述导气管(18)包括第一永磁块(17)侧壁上水平开设的第一水平槽、第二水平槽以及内部竖直开设的竖直槽，且竖直槽与第一水平槽、第二水平槽的两端连通设置。4. A mechanical pneumatic type plastic bowl easy demoulding injection mold according to claim 3, characterized in that, the air duct (18) comprises a first permanent magnet block (17) horizontally opened on the side wall A horizontal slot, a second horizontal slot and a vertical slot opened vertically inside, and the vertical slot is communicated with both ends of the first horizontal slot and the second horizontal slot. 5.根据权利要求1所述的一种机械气动式塑料碗易脱模注塑模具，其特征在于，所述进气管(12)与排气管(14)内分别安装有第一单向阀和第二单向阀。5. A kind of mechanical pneumatic type plastic bowl easy demoulding injection mold according to claim 1, characterized in that, a first one-way valve and a first one-way valve and a Second one-way valve.
CN202011470477.8A 2020-12-14 2020-12-14 Mechanical pneumatic plastic bowl easy-demoulding injection mold Pending CN112519149A (en)

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
CN114228045A (en) * 2021-11-11 2022-03-25 宁波万盛实业有限公司 Injection mold for door seal of washing machine
CN115816712A (en) * 2022-11-17 2023-03-21 贵州海跃模具有限公司 A round soup bowl forming mold
CN116118120A (en) * 2023-04-19 2023-05-16 合肥昊翔汽车零部件有限公司 Small-sized automobile rearview mirror shell forming die and forming method thereof
CN117734146A (en) * 2023-12-28 2024-03-22 中广核博繁新材料(南通)有限公司 Be applied to annotate high-efficient shedder of blowing machine

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CN209409216U (en) * 2019-01-14 2019-09-20 厦门宏驰实业有限公司 A kind of vibrating membrane injection mold
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CN211307194U (en) * 2019-05-30 2020-08-21 湖南桥林再生塑料有限公司 Efficient and rapid injection mold
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Publication number Priority date Publication date Assignee Title
JPH10202702A (en) * 1997-01-29 1998-08-04 Kinugawa Rubber Ind Co Ltd Mold structure for injection molding and ejection of molded product in the mold structure
US20090008838A1 (en) * 2005-01-26 2009-01-08 Michio Komatsu Process for Production of Heat-Resistant Hollow Articles Made of Polylactic Acid Containing Resin
CN108454020A (en) * 2018-05-28 2018-08-28 安徽泰诺塑胶有限公司 Mold is manufactured convenient for the plastic bowl of fast demoulding
CN209126082U (en) * 2018-11-20 2019-07-19 安庆市可瑞实业有限公司 A kind of energy-saving screw rod feeding injection moulding apparatus
CN209409216U (en) * 2019-01-14 2019-09-20 厦门宏驰实业有限公司 A kind of vibrating membrane injection mold
CN211307194U (en) * 2019-05-30 2020-08-21 湖南桥林再生塑料有限公司 Efficient and rapid injection mold
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114228045A (en) * 2021-11-11 2022-03-25 宁波万盛实业有限公司 Injection mold for door seal of washing machine
CN114228045B (en) * 2021-11-11 2023-12-12 宁波万盛实业有限公司 Injection mold of washing machine door seal
CN115816712A (en) * 2022-11-17 2023-03-21 贵州海跃模具有限公司 A round soup bowl forming mold
CN116118120A (en) * 2023-04-19 2023-05-16 合肥昊翔汽车零部件有限公司 Small-sized automobile rearview mirror shell forming die and forming method thereof
CN117734146A (en) * 2023-12-28 2024-03-22 中广核博繁新材料(南通)有限公司 Be applied to annotate high-efficient shedder of blowing machine
CN117734146B (en) * 2023-12-28 2024-09-20 中广核博繁新材料(南通)有限公司 Be applied to annotate high-efficient shedder of blowing machine

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