CN109049729A - A kind of concrete protective plate and its production method - Google Patents

A kind of concrete protective plate and its production method Download PDF

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Publication number
CN109049729A
CN109049729A CN201810981058.7A CN201810981058A CN109049729A CN 109049729 A CN109049729 A CN 109049729A CN 201810981058 A CN201810981058 A CN 201810981058A CN 109049729 A CN109049729 A CN 109049729A
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CN
China
Prior art keywords
plastic board
parts
special
shape materials
metal block
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810981058.7A
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Chinese (zh)
Inventor
谈刚强
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Xiaogan Youwei Technology Co Ltd
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Xiaogan Youwei Technology Co Ltd
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Priority to CN201810981058.7A priority Critical patent/CN109049729A/en
Publication of CN109049729A publication Critical patent/CN109049729A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/24Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/30Electrical means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16SCONSTRUCTIONAL ELEMENTS IN GENERAL; STRUCTURES BUILT-UP FROM SUCH ELEMENTS, IN GENERAL
    • F16S1/00Sheets, panels, or other members of similar proportions; Constructions comprising assemblies of such members
    • F16S1/10Composite members, e.g. with ribs or flanges attached

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

The present invention relates to a kind of concrete protective plate and its production method, which be welded by plastic board and Special plastic part, and special-shaped component bottom metal block makes plastic board and special-shaped component realize and fuse by electromagnetic field spontaneous heating.Specific production method includes: one, unreels and draws plastic board;Two, smooth plastic board;Three, profiled plastic part is placed in discharge mechanism;Four, conveying;Five, Special plastic part is equidistantly placed in plastic plate surface;Six, magnetic field heating;Seven, extrusion forming;Eight, it detects and air-cooled;Nine, it winds and cuts storage.The present invention is compared with prior art; each step division of labor is clear to be closely connected again; has the advantages that good quality conformance, high production efficiency, at low cost using the concrete protective plate that this method produces; also have when concrete protective plate is there are when the defects of solder skip and insufficient weld strength, the advantages of can detecting in time.

Description

A kind of concrete protective plate and its production method
Technical field
The present invention relates to a kind of production method more particularly to a kind of production methods of concrete protective plate.
Background technique
Concrete is widely used in building field, with stronger bearing capacity, but its acid resistance and anti-gas permeation Ability it is weaker, in order to improve the acid resistance of concrete and the ability of anti-gas permeation, except through to concrete material itself Ingredient, the methods of technique improves outside the acid resistance of concrete and the ability of anti-gas permeation, and somebody proposes concrete The mode combined with plastic plate, to meet the requirement of acidproof fabric structure.
In order to realize effective combination of concrete and plastic plate, higher requirement also proposed to plastic plate.Based on above-mentioned It is required that also it is proposed that plastic plate+injection molding production method, not high but there are production efficiencys, technique realizes that difficulty is big Defect.
Summary of the invention
The purpose of the present invention is overcoming deficiency existing for above-mentioned background technique, a kind of producer of concrete protective plate is provided Method.
Technical solution provided by the invention is achieved in that
A kind of concrete protective plate and its production method, it is characterised in that: concrete protective plate be by plastic board with it is different Shape components welding forms, and special-shaped component is made of " V " shape materials and parts and metal block, and " V " shape materials and parts opening direction is in reverse to modeling Expect that plate, the opening angle of " V " shape materials and parts are 30 °~60 °, is because this angle " V " shape materials and parts can be with coagulation Mechanical bond is better achieved in soil.The shape materials and parts bottom " V " has groove, and the bottom that metal block is embedded in " V " shape materials and parts is recessed In slot, the material of the metal block is carbon steel, and metal block is thin plate-shaped structure, and there are two through-hole, on the one hand settings two for inside tool A aperture improves plastic board and " V " shape materials and parts in melting state, mutual connection reliability, on the other hand, gold Belong to block-shaped to be lamellar, spontaneous heat area when metal block enters magnetic field is larger, is conducive to the plastic board around metal block Melt with " V " shape materials and parts.Plastic board and special-shaped component is set to realize and fuse by metal block fever, plastics protection lining is having Body in use, on plastic board " V " shape materials and parts insertion concrete in, form the mechanical bond of height, the two integral into After type, it is difficult to be destroyed, realizes the feature that the service life is long, firmness is strong.
The equipment for producing the concrete protective plate includes unreeling structure, roller press mechanism, chain-wheel mechanism, electromagnetic heating equipment, Discharge mechanism, traction mechanism, rolling-up mechanism, delivery platform, hair dryer, hold-down mechanism and electromagnetic block;
The concrete protective plate is specifically produced to include the following steps:
Step 1: unreeling and draws plastic board, this step is realized by unreeling structure and traction mechanism, plastic board Usually on unreeling structure, traction mechanism is driven by servo motor and hydraulic pressurization mode realizes plastic board from putting Passively unreeling in volume mechanism, traction mechanism damping is adjustable, i.e. the output speed of plastic board is adjustable;
Step 2: smooth plastic board, this step realize that the roller press mechanism exports step 1 by roller press mechanism Plastic board leveling limit;
Step 3: special-shaped component is placed in the screening and sequencing device of discharge mechanism, and the screening and sequencing device is The technology of disclosure is detailed in patent " a kind of concrete protective lining production method (Shen that Zhejiang Shuanglin Electromechanical Technology Co., Ltd. declares Please number: 201610369392.8) the screening and sequencing device in ", details are not described herein.This step by prefabricated special-shaped component into Row screening and ordered arrangement, so that each " V " shape materials and parts is with opening up state successively ordered arrangement, the blowing Mechanism is placed in the top of chain-wheel mechanism, and charge motion direction is vertical with the chain-wheel mechanism direction of motion;
Step 4: conveying, this step realize that spacing arrangements have several electricity on the chain-wheel mechanism etc. by chain-wheel mechanism Magnetic patch, the spacing between adjacent electromagnetic block is 50~75mm, by a large amount of engineering experience, so set, plastics guarantor can be improved Peel strength between shield lining and cement, each electromagnetic block are placed in protective cap, and protective cap is fixed by screws in chain-wheel mechanism On, chain-wheel mechanism is rotated by servo motor driving wheel, the movement of gear drive chain;
Step 5: special-shaped component is equidistantly placed in the surface of plastic board, the corresponding placement of this step abnormity component The upper end of each electromagnetic block on chain-wheel mechanism in step 4, special-shaped component are placed through in the discharge mechanism of step 3 Equidistant shift fork feeding device realize that the equidistant shift fork feeding device is disclosed technology, be detailed in the double woods machines in Zhejiang Patent " a kind of concrete protective lining production method (application number: in 201610369392.8) " that electric Science and Technology Ltd. declares Equidistant shift fork feeding device, details are not described herein.Electromagnetic block adsorbs the metal block in special-shaped component, is fixed on special-shaped component The upper end of electromagnetic block, special-shaped inter-module away from size can be adjusted according to actual needs by PLC controller;
Step 6: magnetic field heating, after step 5 abnormity component is equidistantly placed on the surface of plastic board, according to one Fixed rate is by the lower section of electromagnetic heating equipment, and the metal block in special-shaped component enters spontaneous after electromagnetic heating equipment at this time Heat melts " V " the shape materials and parts of metal block upper end and the plastic board of metal block lower end, and " V " shape materials and parts, which melt face, to be goed deep into In plastic board, depth is 0.3mm~0.5mm, so set, making the mutual weldability of " V " shape materials and parts and plastic board More preferably;
Step 7: step 6 is in " V " the shape materials and parts of melting state and plastic board is transported to pressure by extrusion forming At tight mechanism, in the case where the pressure of hold-down mechanism is made, realize that " V " shape materials and parts are merged with the mutual of plastic board;
Step 8: the state after step 7 " V " shape materials and parts and plastic board welding is passed through traction mechanism by wind-force detection It is transported to from hair dryer from delivery platform, hair dryer is realized to " V " the shape materials and parts and plastic board after step 7 as-welded Cooling and defects detection, " V " shape materials and parts are not firm or defective with plastic board welding, in the effect of hair dryer Under, " V " shape materials and parts can be blown away;
Step 9: winding and cuts storage, which is realized by rolling-up mechanism and wound, and after the completion of winding, passes through cutting Device serves as a contrast invalid part to the plastics protection after winding and cut then storage.
Preferably, the plastic board and " V " shape materials and parts use PP, PE, PVC or PPR thermoplastic material system At.It so uses, so that plastics protection lining overall cost is low, long service life, can realize well mechanical bond with concrete.
Preferably, the magnetic field heating in the step 6, the temperature control of metal block is at 180 DEG C~250 DEG C, temperature mistake Low, " V " shape materials and parts are not easy to melt with plastic board, and temperature is excessively high, are easy to cause " V " shape materials and parts and plastic board whole Temperature distortion, the place that metal block surrounding heat source is concentrated, " V " shape materials and parts and plastic board are easy in the shape for being melted into liquid State and be not easy coagulation forming.
The beneficial effects of the present invention are:
A. the invention proposes a kind of concrete protective plate and its production methods.The present invention according to the hot melt characteristics of plastics, Combination between plastic board and " V " shape plastic part is entered into reality by way of electromagnetic field realizes automatic heating melting metal block It is existing, and by the punching press of hold-down mechanism, substantially increase the stability of its welding;
B. the setting of hair dryer has not only fast implemented the fast quickly cooling to plastic board and " V " shape plastic part after welding But, and detection to the underproof component of welding is realized, achievees the effect that kill two birds with one stone;
C. in order to produce the concrete protective plate, the present invention specifically provides a kind of production method, in process of production, respectively A step division of labor defines but the cooperation that is closely connected, and not only increases the quality of plastics protection lining, so that protection lining is in jail Soundness, durability etc. reach higher standard, and production efficiency is higher, and homogeneity of product is preferable.
Detailed description of the invention
Fig. 1 is the flow chart of production method of the present invention;
Fig. 2 for the used equipment of production method of the present invention overall structure diagram;
Fig. 3 is the structure composition figure of the present invention special-shaped component and plastic board;
Fig. 4 is overall structure diagram after present invention manufacture.
In Fig. 2~Fig. 4: 1-plastic board, 2-special-shaped components, 2-1-" V " shape materials and parts, 2-2-metal block, 3-chains Mechanism is taken turns, 4-electromagnetic heating equipment, 5-discharge mechanisms, 6-unreeling structures, 7-roller press mechanisms, 8-traction mechanisms, 9-receive Roll up mechanism, 10-delivery platforms, 11-hair dryers, 12-hold-down mechanisms, 13-electromagnetic blocks.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing and specific implementation Example, invention is further described in detail.It should be appreciated that specific embodiment described herein is only used to explain this hair It is bright, it is not intended to limit the present invention.In addition, technical characteristic involved in the various embodiments of the present invention described below It can be combined with each other as long as they do not conflict with each other.
A kind of preferred embodiment of the invention, a kind of concrete protective plate, as shown in figure 3, being by plastic board 1 and abnormity Component 2 is welded, and special-shaped component 2 is made of " V " shape materials and parts 2-1 and metal block 2-2, " V " shape materials and parts 2-1 opening direction It is in reverse to plastic board 1, the opening angle of " V " shape materials and parts 2-1 is 30 °~60 °, and " V " shape bottom materials and parts 2-1 has recessed Slot, metal block 2-2 are embedded in the bottom groove of " V " shape materials and parts 2-1, and the material of the metal block 2-2 is carbon steel, metal block 2-2 is thin plate-shaped structure, and there are two through-holes for inside tool, realizes plastic board 1 and special-shaped component 2 by metal block 2-2 fever Fusion.Preferably, the plastic board 1 and " V " shape materials and parts 2-1 use PP, PE, PVC or PPR thermoplastic material system At the preferred PVC material of the present embodiment.
Equipment used in the concrete protective plate is produced as shown in Fig. 2, including unreeling structure 6, roller press mechanism 7, chain turbine Structure 3, electromagnetic heating equipment 4, discharge mechanism 5, traction mechanism 8, rolling-up mechanism 9, delivery platform 10, hair dryer 11, hold-down mechanism 12 and electromagnetic block 13.
The method of the concrete protective plate is specifically produced as shown in Figure 1, including the following steps:
Step 1: unreeling and draws plastic board 1, this step is realized by unreeling structure 6 and traction mechanism 8, plastics When plate 1 is flat on unreeling structure 6, traction mechanism 8 is driven by servo motor and hydraulic pressurization mode realizes plastics Plate 1 is from passively unreeling on unreeling structure 6, and traction mechanism 8 damps adjustable, i.e. the output speed of plastic board 1 is adjustable;
Step 2: smooth plastic board 1, this step realize that the roller press mechanism 7 is defeated by step 1 by roller press mechanism 7 Plastic board 1 out flattens limit;
Step 3: special-shaped component 2 is placed in the screening and sequencing device of discharge mechanism 5, and the screening and sequencing device is The prior art repeats no more.Prefabricated special-shaped component 2 screen simultaneously ordered arrangement by this step, so that each " V " type All with opening up state, successively ordered arrangement, the discharge mechanism 5 are placed in the top of chain-wheel mechanism 3 to plastic part 2-1, into Expect that the direction of motion is vertical with 3 direction of motion of chain-wheel mechanism;
Step 4: conveying, this step realize that spacing arrangements have several on the chain-wheel mechanism 3 etc. by chain-wheel mechanism 3 Electromagnetic block 13, the spacing between adjacent electromagnetic block 13 is 50~75mm, and each electromagnetic block 13 is placed in protective cap, and protective cap passes through Screw is fixed on chain-wheel mechanism 3, and chain-wheel mechanism 3 is rotated by servo motor driving wheel, the movement of gear drive chain;
Special-shaped component 2: being equidistantly placed in the surface of plastic board 1 by step 5, this step abnormity component 2 is corresponding to be put It is placed in the upper end of each electromagnetic block 13 on the chain-wheel mechanism 3 in step 4, the blowing for being placed through step 3 of special-shaped component 2 Equidistant shift fork feeding device in mechanism 5 realizes that equidistant shift fork feeding device is prior art, and details are not described herein.Electricity Magnetic patch 13 adsorbs the metal block 2-2 in special-shaped component 2, and special-shaped component 2 is made to be fixed on the upper end of electromagnetic block 13, between special-shaped component 2 Away from size can be adjusted according to actual needs by PLC controller;
Step 6: magnetic field heating, after step 5 abnormity component 2 is equidistantly placed on the surface of plastic board 1, according to Certain rate passes through the lower section of electromagnetic heating equipment 4, and the metal block 2-2 in special-shaped component 2 enters electromagnetic heating equipment 4 at this time " V " shape materials and parts 2-1 of the upper end metal block 2-2 and the plastic board 1 of the lower end metal block 2-2, " V " type are melted in spontaneous heating afterwards Plastic part 2-1 melting face is goed deep into plastic board 1, and depth is 0.3mm~0.5mm;Preferably, the metal block 2-2 in this step Temperature control at 180 DEG C~250 DEG C.
Step 7: step 6 is in " V " shape materials and parts 2-1 of melting state and plastic board 1 conveys by extrusion forming To at hold-down mechanism 12, in the case where the pressure of hold-down mechanism 12 is made, realization " V " shape materials and parts 2-1 mutually melts with plastic board 1 It closes;
Step 8: the state after step 7 " V " shape materials and parts 2-1 and 1 welding of plastic board is passed through traction by wind-force detection Mechanism 8 is transported to from hair dryer 11 from delivery platform 10, and hair dryer 11 is realized to " V " shape materials and parts after step 7 as-welded The cooling and defects detection of 2-1 and plastic board 1, " V " shape materials and parts 2-1 and 1 welding of plastic board be not firm or defective , under the action of hair dryer 11, " V " shape materials and parts 2-1 can be blown away;
Step 9: winding and cuts storage, which realizes winding by rolling-up mechanism 9, after the completion of winding, passes through cutting Device serves as a contrast invalid part to the plastics protection after winding and cut then storage.
The concrete protective plate for preparing qualified storage through the above steps is as shown in Figure 4.
The above is only a preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered It is considered as protection scope of the present invention.

Claims (3)

1. a kind of concrete protective plate and its production method, it is characterised in that: concrete protective plate be by plastic board (1) with it is different Shape component (2) is welded, and special-shaped component (2) is made of " V " shape materials and parts (2-1) and metal block (2-2), " V " shape materials and parts (2-1) opening is towards being in reverse to plastic board (1), and the opening angle of " V " shape materials and parts (2-1) is 30 °~60 °, " V " plastic The part bottom (2-1) has groove, and metal block (2-2) is embedded in the bottom groove of " V " shape materials and parts (2-1), the metal block The material of (2-2) is carbon steel, and metal block (2-2) is thin plate-shaped structure, and there are two through-holes for inside tool, are sent out by metal block (2-2) Heat makes plastic board (1) and special-shaped component (2) realize and fuse;
The equipment for producing the concrete protective plate includes unreeling structure (6), roller press mechanism (7), chain-wheel mechanism (3), electromagnetic heating Equipment (4), discharge mechanism (5), traction mechanism (8), rolling-up mechanism (9), delivery platform (10), hair dryer (11), hold-down mechanism (12) and electromagnetic block (13);
The concrete protective plate is specifically produced to include the following steps:
Step 1: unreeling and draws plastic board (1), this step is realized by unreeling structure (6) and traction mechanism (8), modeling For material plate (1) usually on unreeling structure (6), traction mechanism (8) passes through servo motor driving and hydraulic pressurization mode Plastic board (1) is realized from passively unreeling on unreeling structure (6), traction mechanism (8) damping is adjustable, i.e. plastic board (1) Output speed is adjustable;
Step 2: smooth plastic board (1), this step realized by roller press mechanism (7), and the roller press mechanism (7) is by step 1 The plastic board (1) of output flattens limit;
Step 3: special-shaped component (2) being placed in the screening and sequencing device of discharge mechanism (5), this step will be prefabricated different Shape component (2) screen and ordered arrangement so that each " V " shape materials and parts (2-1) with opening up state successively Ordered arrangement, the discharge mechanism (5) are placed in the top of chain-wheel mechanism (3), and charge motion direction and chain-wheel mechanism (3) move Direction is vertical;
Step 4: conveying, this step realize that chain-wheel mechanism (3) the first-class spacing arrangement has several by chain-wheel mechanism (3) Electromagnetic block (13), the spacing between adjacent electromagnetic block (13) is 50~75mm, and each electromagnetic block (13) is placed in protective cap, is protected Cap is fixed by screws on chain-wheel mechanism (3), and chain-wheel mechanism (3) is rotated by servo motor driving wheel, gear drive chain Movement;
Special-shaped component (2): being equidistantly placed in the surface of plastic board (1) by step 5, this step abnormity component (2) is corresponding It is placed in the upper end of each electromagnetic block (13) on the chain-wheel mechanism in step 4 (3), special-shaped component (2) is placed through step Equidistant shift fork feeding device in three discharge mechanism (5) realizes that electromagnetic block (13) adsorbs the metal block in special-shaped component (2) (2-2) makes special-shaped component (2) be fixed on the upper end of electromagnetic block (13), and the size of special-shaped component (2) spacing can be according to actual needs It is adjusted by PLC controller;
Step 6: magnetic field heating, after step 5 abnormity component (2) is equidistantly placed on the surface of plastic board (1), according to Certain rate passes through the lower section of electromagnetic heating equipment (4), and the metal block (2-2) in special-shaped component (2) adds into electromagnetism at this time " V " shape materials and parts (2-1) and the lower end metal block (2-2) of the upper end metal block (2-2) are melted in warm equipment (4) spontaneous heating afterwards Plastic board (1), the melting face " V " shape materials and parts (2-1) are goed deep into plastic board (1), and depth is 0.3mm~0.5mm;
Step 7: step 6 is in " V " the shape materials and parts (2-1) of melting state and plastic board (1) conveys by punch forming To at hold-down mechanism (12), in the case where the pressure of hold-down mechanism (12) is made, " V " shape materials and parts (2-1) and plastic board (1) is realized Mutually fusion;
Step 8: the state after step 7 " V " shape materials and parts (2-1) and plastic board (1) welding is passed through traction by wind-force detection Mechanism (8) is transported at hair dryer (11) from delivery platform (10), and hair dryer (11) is realized to " V " after step 7 as-welded The cooling and defects detection of shape materials and parts (2-1) and plastic board (1), " V " shape materials and parts (2-1) and plastic board (1) welding Not firm or defective, under the action of hair dryer (11), " V " shape materials and parts (2-1) can be blown away;
Step 9: winding and cuts storage, which realizes winding by rolling-up mechanism (9), after the completion of winding, is filled by cutting It sets the part invalid to the plastics protection lining after winding and cut then storage.
2. a kind of concrete protective plate according to claim 1 and its production method, it is characterised in that: the Plastic Flat Plate (1) and " V " shape materials and parts (2-1) are made of PP, PE, PVC or PPR thermoplastic material.
3. a kind of concrete protective plate according to claim 1 and its production method, it is characterised in that: in the step 6 Magnetic field heating, the temperature of metal block (2-2) controls at 180 DEG C~250 DEG C.
CN201810981058.7A 2018-08-27 2018-08-27 A kind of concrete protective plate and its production method Pending CN109049729A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29809899U1 (en) * 1998-06-03 1998-08-13 Joisten & Kettenbaum GmbH & Co KG, 51429 Bergisch Gladbach Welding electrode
CN103921436A (en) * 2014-04-10 2014-07-16 上海交通大学 Thin film high-temperature welding machine and welding method
CN106003698A (en) * 2016-05-28 2016-10-12 浙江双林机电科技有限公司 Production method for concrete protection lining
WO2017108003A1 (en) * 2015-12-25 2017-06-29 杜崇铭 Smart 3d rapid moulding material plasticising double filament production system
WO2018000552A1 (en) * 2016-06-29 2018-01-04 伯恩太阳能科技有限公司 Method for fabricating greenhouse film
CN208930745U (en) * 2018-08-27 2019-06-04 孝感有为科技有限公司 A kind of concrete protective plate

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29809899U1 (en) * 1998-06-03 1998-08-13 Joisten & Kettenbaum GmbH & Co KG, 51429 Bergisch Gladbach Welding electrode
CN103921436A (en) * 2014-04-10 2014-07-16 上海交通大学 Thin film high-temperature welding machine and welding method
WO2017108003A1 (en) * 2015-12-25 2017-06-29 杜崇铭 Smart 3d rapid moulding material plasticising double filament production system
CN106003698A (en) * 2016-05-28 2016-10-12 浙江双林机电科技有限公司 Production method for concrete protection lining
WO2018000552A1 (en) * 2016-06-29 2018-01-04 伯恩太阳能科技有限公司 Method for fabricating greenhouse film
CN208930745U (en) * 2018-08-27 2019-06-04 孝感有为科技有限公司 A kind of concrete protective plate

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