CN104084329B - A kind of AB glue point glue equipment based on electrostatic spray principle - Google Patents
A kind of AB glue point glue equipment based on electrostatic spray principle Download PDFInfo
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- CN104084329B CN104084329B CN201410337018.0A CN201410337018A CN104084329B CN 104084329 B CN104084329 B CN 104084329B CN 201410337018 A CN201410337018 A CN 201410337018A CN 104084329 B CN104084329 B CN 104084329B
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- spray gun
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- electrospray needle
- socket
- electrospray
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- 239000007921 spray Substances 0.000 title claims abstract description 68
- 239000003292 glue Substances 0.000 title claims abstract description 31
- 239000007788 liquid Substances 0.000 claims abstract description 23
- 238000007590 electrostatic spraying Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 9
- 239000000084 colloidal system Substances 0.000 abstract description 8
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 238000000889 atomisation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000002537 cosmetic Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 229920006335 epoxy glue Polymers 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 238000004887 air purification Methods 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000009688 liquid atomisation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
- B05B5/03—Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying
Landscapes
- Nozzles (AREA)
Abstract
本发明属于AB胶点胶设备技术领域，涉及一种基于静电喷雾原理的AB胶点胶装置，喷枪手柄设置在喷枪管下方；气泵和推进泵分别与高压静电发生器电连接，高压静电发生器的正极与喷枪手柄电连接，负极接地；喷枪管内设置有电喷针头，喷枪手柄的下端制有插口，气泵的一侧制有气流导管插口，气流导管的两端分别插入气流导管插口和插口；电喷针头通过喷枪手柄内的内部导线与外部导线连接；喷枪管的前部为喷枪喷头，喷枪管的后部设有管塞，第一注射器和第二注射器的一端分别与推进泵连接，第一注射器和第二注射器的另一端分别通过第一进液管和第二进液管与电喷针头连通；其结构简单，操作方便，胶体混合均匀，节约胶体，粘结质量高，应用广泛。
The invention belongs to the technical field of AB glue dispensing equipment, and relates to an AB glue dispensing device based on the principle of electrostatic spraying. The positive pole of the spray gun is electrically connected to the handle of the spray gun, and the negative pole is grounded; the spray gun tube is provided with an electrospray needle, the lower end of the spray gun handle is formed with a socket, one side of the air pump is formed with an airflow conduit socket, and the two ends of the airflow conduit are respectively inserted into the airflow conduit socket and the socket; The electrospray needle is connected with the external wire through the internal wire in the handle of the spray gun; the front part of the spray gun tube is the spray gun nozzle, the rear part of the spray gun tube is provided with a pipe plug, and one end of the first syringe and the second syringe are respectively connected with the propulsion pump, and the second The other ends of the first syringe and the second syringe communicate with the electrospray needle through the first liquid inlet pipe and the second liquid inlet pipe respectively; the structure is simple, the operation is convenient, the colloid is evenly mixed, the colloid is saved, the bonding quality is high, and the application is extensive.
Description
技术领域：Technical field:
本发明属于AB胶点胶设备技术领域，涉及一种AB胶点胶设备，特别涉及一种基于静电喷雾原理、气流辅助定向的AB胶点胶装置。The invention belongs to the technical field of AB glue dispensing equipment, relates to an AB glue dispensing equipment, in particular to an AB glue dispensing device based on the principle of electrostatic spraying and airflow-assisted orientation.
背景技术：Background technique:
目前，以AB胶为代表的两组份混合固化胶由于具备粘结强度高、粘结材料广泛、油面粘结、固化速度快以及可常温固化等优点，在装修行业、汽车修补、石材加工，家具、箱包、工艺品、饰品、电子、机械制造等行业领域有广泛的应用；通常使用的AB胶是指丙烯酸改性环氧胶或环氧胶,其中A组分是丙烯酸改性环氧树脂或环氧树脂，为本胶，B组分是改性胺或其他硬化剂；使用时两组份按一定比例混合，发生硬化反应，从而起到粘结功能；通常利用手工混合或者点胶枪和点胶机等设备将胶水呈点状、线状或面状分布在需要粘结部位的过程称为点胶，手工混合点胶不但效率低，且通常不容易均匀混合会造成固化不良；利用点胶枪和点胶机等专门设备进行点胶的基本原理在于将A、B胶分别注入不同管道，利用分动或者联动活塞推动二者进入胶体混合区(一般为静态混合)进行混合，然后利用点胶针头进行点胶，虽然点胶效率与质量获得提高，但同时存在针头易堵、操作复杂、胶体覆盖不均匀等缺点。为了提高点胶效率与质量，降低点胶设备的故障率，近期中国专利CN202238508U、CN202921508U和CN202752164U设计了多种新型点胶设备，但并没有从基本原理上对点胶过程进行改进，点胶针头喷出的胶为液滴状或者为连续的液流，造成胶体大量浪费的同时造成环境污染。静电喷雾为通过高压静电发生装置实现液体雾化的的技术，其原理最早于1914年被提出(ZelenyJ.1914Phys.Rev.3:69–91)，上世纪70年代后开始获得大量应用，由于其能够方便实现微纳米级别的雾化而被广泛应用于喷涂作业、空气净化、大规模农药喷洒等领域。直接利用静电喷雾技术对AB胶进行点胶，由于其能够实现微纳米级雾化因而很容易实现A、B两组份的均匀混合，从基本原理上改进了传统的点胶方式；然而由于电场线的发散性分布以及带有大量静电荷雾化颗粒的相互排斥作用，会造成雾化颗粒在到达目标物体的过程中发生发散，甚至产生环包效应，到达目标物的背面，因此会出现点胶定向性差、涂胶效率不高等缺点。At present, the two-component mixed curing adhesive represented by AB glue has the advantages of high bonding strength, wide range of bonding materials, oil surface bonding, fast curing speed, and room temperature curing. , furniture, bags, handicrafts, jewelry, electronics, machinery manufacturing and other industries are widely used; the commonly used AB glue refers to acrylic modified epoxy glue or epoxy glue, where A component is acrylic modified epoxy resin Or epoxy resin, as the glue, B component is a modified amine or other hardener; when used, the two components are mixed in a certain proportion, and the hardening reaction occurs, so as to play the bonding function; usually by manual mixing or dispensing gun The process of distributing glue in dots, lines or surfaces on the parts that need to be bonded is called dispensing. Manual mixing and dispensing is not only inefficient, but it is usually not easy to mix uniformly and cause poor curing; use The basic principle of dispensing glue with special equipment such as glue guns and glue dispensers is to inject glue A and glue B into different pipes respectively, and use the split or linkage piston to push the two into the glue mixing area (usually static mixing) for mixing, and then Using dispensing needles for dispensing, although the dispensing efficiency and quality are improved, but at the same time there are disadvantages such as easy plugging of the needles, complicated operation, and uneven colloid coverage. In order to improve the efficiency and quality of dispensing and reduce the failure rate of dispensing equipment, the recent Chinese patents CN202238508U, CN202921508U and CN202752164U have designed a variety of new dispensing equipment, but they have not improved the dispensing process from the basic principle. The sprayed glue is in the form of droplets or continuous liquid flow, which causes a large amount of waste of the glue and causes environmental pollution. Electrostatic spraying is a technology that realizes liquid atomization through a high-voltage electrostatic generator. Its principle was first proposed in 1914 (ZelenyJ.1914Phys.Rev.3:69–91), and it has been widely used since the 1970s. It is widely used in spraying operations, air purification, large-scale pesticide spraying and other fields because it can conveniently realize atomization at the micro-nano level. Directly use electrostatic spray technology to dispensing AB glue, because it can achieve micro-nano atomization, it is easy to achieve uniform mixing of A and B components, which improves the traditional dispensing method from the basic principle; however, due to the electric field The divergent distribution of the wires and the mutual repulsion of the atomized particles with a large amount of electrostatic charge will cause the atomized particles to diverge in the process of reaching the target object, and even produce a ring wrap effect, reaching the back of the target object, so there will be a point The disadvantages of poor glue orientation and low glue application efficiency.
发明内容：Invention content:
本发明的目的在于克服现有点胶技术存在的缺点，寻求设计提供一种基于静电喷雾原理、气流辅助定向的点胶装置，从基本原理上改变原有的点胶装置结构，实现A、B组份微纳米级别的均匀混合，具备粘结效果理想和用胶量显著降低等优势，有助于推动AB胶在各领域的应用；并且通过对装置供液部分与喷头部分的简单改造，便可应用于多组分混合固化胶，同时在多组份药物喷剂和化妆品等领域均有很大的应用潜力。The purpose of the present invention is to overcome the shortcomings of the existing dispensing technology, seek to design and provide a dispensing device based on the principle of electrostatic spraying and air-assisted orientation, change the structure of the original dispensing device from the basic principle, and realize A and B. The uniform mixing of components at the micro-nano level has the advantages of ideal bonding effect and significantly reduced glue consumption, which helps to promote the application of AB glue in various fields; and through the simple modification of the liquid supply part and nozzle part of the device, it is convenient It can be applied to multi-component mixing and curing adhesives, and has great application potential in the fields of multi-component drug sprays and cosmetics.
为了实现上述目的，本发明的主体结构包括气泵、高压静电发生器、推进泵、喷枪手柄、喷枪管、第一注射器、第二注射器、第一进液管、第二进液管、管塞、外部导线、内部导线、气流导管插口、气流导管、插口和电喷针头；喷枪手柄与喷枪管连通构成喷枪，喷枪手柄设置在喷枪管下方；气泵和推进泵分别与高压静电发生器电连接，高压静电发生器的正极通过外部导线与喷枪电连接，高压静电发生器的负极接地；喷枪管内设置有电喷针头，电喷针头为与喷枪管同轴的双组份同轴电喷针头或双组份并排电喷针头；喷枪管与电喷针头之间形成环形结构的气流通道；喷枪手柄的下端开制有插口，气泵的一侧开制有气流导管插口，气流导管的一端插入气流导管插口，另一端插入插口，使气泵和喷枪管相连通；喷枪手柄内设置有内部导线，电喷针头通过内部导线与外部导线连接；喷枪管的前部为喇叭形的喷枪喷头，喷枪管的后部设置有管塞，电喷针头的一端位于喷枪喷头内部，另一端由管塞固定并从管塞伸出；第一注射器的一端与推进泵连接，另一端通过第一进液管与电喷针头连通；第二注射器的一端与推进泵连接，另一端通过第二进液管与电喷针头连通；推进泵分别控制第一注射器和第二注射器内液体的流量。In order to achieve the above object, the main structure of the present invention includes an air pump, a high-voltage electrostatic generator, a propulsion pump, a spray gun handle, a spray gun tube, a first syringe, a second syringe, a first liquid inlet pipe, a second liquid inlet pipe, a pipe plug, External wires, internal wires, airflow conduit sockets, airflow conduits, sockets and electrospray needles; the spray gun handle is connected with the spray gun tube to form a spray gun, and the spray gun handle is arranged under the spray gun tube; The positive electrode of the electrostatic generator is electrically connected to the spray gun through an external wire, and the negative electrode of the high-voltage electrostatic generator is grounded; there is an electric spray needle in the spray gun tube, and the electric spray needle is a two-component coaxial electric spray needle coaxial with the spray gun tube or a double group There are two side-by-side electrospray needles; a circular air flow channel is formed between the spray gun tube and the electrospray needle; the lower end of the spray gun handle is made with a socket, and one side of the air pump is made with an airflow conduit socket, and one end of the airflow conduit is inserted into the airflow conduit socket. The other end is inserted into the socket to connect the air pump with the spray gun tube; there is an internal wire in the spray gun handle, and the electric spray needle is connected to the external wire through the internal wire; the front of the spray gun tube is a trumpet-shaped spray gun nozzle, and the rear of the spray gun tube is set There is a pipe plug, one end of the electrospray needle is located inside the nozzle of the spray gun, and the other end is fixed by the pipe plug and protrudes from the pipe plug; one end of the first syringe is connected to the propulsion pump, and the other end communicates with the electrospray needle through the first liquid inlet pipe ; One end of the second syringe is connected to the propulsion pump, and the other end communicates with the electrospray needle through the second liquid inlet pipe; the propulsion pump controls the flow of the liquid in the first syringe and the second syringe respectively.
本发明或增加与推进泵相连的注射器，并增加相应的进液管将增加的注射器与电喷针头连通，此时，电喷针头为多组份并排电喷针头或与喷枪管同轴的多组份同轴电喷针头，实现多组份固化胶的点胶过程。The present invention may increase the injector connected with the propulsion pump, and increase the corresponding liquid inlet pipe to connect the increased injector with the electrospray needle. Component coaxial electrospray needles realize the dispensing process of multi-component curing glue.
本发明与现有技术相比，具有以下特点和优点：一是实现A、B各组份胶体的微纳米级雾化，从而实现两组份的完全均匀混合；二是利用气流辅助定向功能的喷雾技术，保证胶体覆盖目标物准确、均匀，特别适用于粘结面不规则情况下的粘结操作；三是使用少量微纳米级别的雾化胶体即可达到粘结效果，用胶量明显降低；四是能精确控制各组分的用量比例；其结构简单，使用安全，操作方便，胶体混合、沉积均匀，节约胶体，能精确控制点胶位置，粘结质量高，应用广泛，可应用于多组份混合固化胶、药物喷剂和化妆品的使用过程中。Compared with the prior art, the present invention has the following characteristics and advantages: one is to realize the micro-nano level atomization of the colloids of components A and B, so as to realize the complete and uniform mixing of the two components; the other is to use airflow to assist the orientation function Spray technology ensures that the colloid covers the target object accurately and evenly, and is especially suitable for bonding operations when the bonding surface is irregular; third, the bonding effect can be achieved by using a small amount of atomized colloid at the micro-nano level, and the amount of glue used is significantly reduced ; Fourth, it can accurately control the dosage ratio of each component; it has simple structure, safe use, convenient operation, colloid mixing, uniform deposition, colloid saving, precise control of dispensing position, high bonding quality, wide application, and can be used in During the use of multi-component mixed curing glue, drug spray and cosmetics.
附图说明：Description of drawings:
图1为本发明的主体结构原理示意图。Fig. 1 is a schematic diagram of the principle of the main structure of the present invention.
图2为本发明所述电喷针头截面示意图，其中其中最外部通道Q为气流通道；a为AB双组份同轴电喷针头；b为AB双组份并排电喷针头；c为ABC三组份同轴电喷针头；d为ABC三组份并排电喷针头。Fig. 2 is a schematic cross-sectional view of the electrospray needle according to the present invention, wherein the outermost channel Q is an air flow channel; a is an AB two-component coaxial electrospray needle; b is an AB two-component side-by-side electrospray needle; c is an ABC three Component coaxial electrospray needles; d is ABC three-component side by side electrospray needles.
图3为本发明实施例进行点胶过程时的示意图。Fig. 3 is a schematic diagram of an embodiment of the present invention when performing a dispensing process.
具体实施方式：detailed description:
下面通过实施例并结合附图对本发明作进一步说明。The present invention will be further described below by way of embodiments and in conjunction with the accompanying drawings.
实施例1：Example 1:
本实施例的主体结构包括气泵1、高压静电发生器2、推进泵3、喷枪手柄4、喷枪管5、第一注射器6、第二注射器7、第一进液管8、第二进液管9、管塞10、外部导线11、内部导线12、气流导管插口13、气流导管14、插口15和电喷针头16；喷枪手柄4与喷枪管5连通构成喷枪，喷枪手柄4设置在喷枪管5下方；气泵1和推进泵3分别与高压静电发生器3电连接，高压静电发生器2的正极通过外部导线11与喷枪电连接，负极接地；喷枪管5内设置有电喷针头16，电喷针头16为与喷枪管5同轴的双组份同轴电喷针头；喷枪管5与电喷针头16之间形成环形结构的气流通道Q；喷枪手柄4的下端开制有插口15，气泵1的一侧开制有气流导管插口13，气流导管14的一端插入气流导管插口13，另一端插入插口15，使气泵1和喷枪管5相连通；喷枪手柄4内设置有内部导线12，电喷针头16通过内部导线12与外部导线11连接；喷枪管5的前部为喇叭形的喷枪喷头，喷枪管5的后部设置有管塞10，电喷针头16的一端位于喷枪喷头内部，另一端由管塞10固定并从管塞10伸出；第一注射器6的一端与推进泵3连接，另一端通过第一进液管8与电喷针头16连通；第二注射器7的一端与推进泵3连接，另一端通过第二进液管9与电喷针头16连通；推进泵分别控制第一注射器6和第二注射器7内液体的流量。The main structure of this embodiment includes an air pump 1, a high-voltage electrostatic generator 2, a propulsion pump 3, a spray gun handle 4, a spray gun tube 5, a first syringe 6, a second syringe 7, a first liquid inlet pipe 8, and a second liquid inlet pipe 9. Pipe plug 10, external wire 11, internal wire 12, airflow conduit socket 13, airflow conduit 14, socket 15 and electrospray needle 16; spray gun handle 4 is connected with spray gun tube 5 to form a spray gun, and spray gun handle 4 is arranged on spray gun tube 5 Below: the air pump 1 and the propulsion pump 3 are electrically connected to the high-voltage electrostatic generator 3 respectively, the positive pole of the high-voltage electrostatic generator 2 is electrically connected to the spray gun through an external wire 11, and the negative pole is grounded; The needle 16 is a two-component coaxial electrospray needle that is coaxial with the spray gun tube 5; an air flow channel Q with a ring structure is formed between the spray gun tube 5 and the electrospray needle 16; One side of the airflow conduit 14 is opened with an airflow conduit socket 13, and one end of the airflow conduit 14 is inserted into the airflow conduit socket 13, and the other end is inserted into the socket 15, so that the air pump 1 and the spray gun tube 5 are connected; Needle 16 is connected with external lead 11 by internal wire 12; Fixed by the tube plug 10 and protruding from the tube plug 10; one end of the first syringe 6 is connected to the propulsion pump 3, and the other end communicates with the electrospray needle 16 through the first liquid inlet tube 8; one end of the second syringe 7 is connected to the propulsion pump 3, the other end communicates with the electrospray needle 16 through the second liquid inlet pipe 9; the propulsion pump controls the flow of the liquid in the first syringe 6 and the second syringe 7 respectively.
本实施例对AB胶进行点胶作业时，先将A、B组份液体分别加入到第一注射器6和第二注射器7内，依此打开气泵1、高压静电发生器2和推进泵3的电源，根据需要分别调节气泵1的气流速度、高压静电发生器2的电压和推进泵3的推进速度；手持喷枪手柄4，将喷枪管5喷头对准目标物开始喷涂点胶；喷涂点胶结束后，调节气泵1、高压静电发生器2和推进泵3至各自的最小值，最后依此关闭气泵1、高压静电发生器2和推进泵3的电源。In this embodiment, when dispensing the AB glue, the A and B component liquids are respectively added into the first syringe 6 and the second syringe 7, and the air pump 1, the high-voltage electrostatic generator 2 and the propulsion pump 3 are turned on accordingly. Power supply, respectively adjust the airflow speed of the air pump 1, the voltage of the high-voltage electrostatic generator 2 and the propulsion speed of the propulsion pump 3 according to the needs; hold the spray gun handle 4, and align the nozzle of the spray gun tube 5 with the target object to start spraying and dispensing; the spraying and dispensing end Finally, adjust the air pump 1, the high-voltage electrostatic generator 2 and the propulsion pump 3 to their respective minimum values, and finally turn off the power supply of the air pump 1, the high-voltage electrostatic generator 2 and the propulsion pump 3 accordingly.
本实施例分别对玻璃、泡沫、陶瓷以及木头等材料进行了粘结实验，并对其粘结后的抗拉力进行了测试，发现该装置对以上材料均能达到很好的粘结效果。In this embodiment, bonding experiments are carried out on materials such as glass, foam, ceramics, and wood, and the tensile strength after bonding is tested. It is found that the device can achieve good bonding effects on the above materials.
实施例2：Example 2:
本实施例采用与实施例1相同的结构，将电喷针头16改为三组份并排电喷针头或与喷枪管5同轴的三组份同轴电喷针头，如图2c、2d所示，同时增加与推进器3相连的第三注射器，增加第三进液管将第三注射器与电喷针头16连通，实现三组份混合物固化剂的点胶过程。This embodiment adopts the same structure as Embodiment 1, and the electrospray needle 16 is changed to a three-component side-by-side electrospray needle or a three-component coaxial electrospray needle coaxial with the spray gun tube 5, as shown in Figure 2c and 2d , while adding a third syringe connected to the propeller 3, and adding a third liquid inlet pipe to connect the third syringe with the electrospray needle 16, so as to realize the dispensing process of the three-component mixture curing agent.
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| CN104259002B (en) * | 2014-10-21 | 2016-10-12 | 青岛大学 | A kind of electrostatic spray eliminates the method that can enter lung particulate matter |
| CN104259003A (en) * | 2014-10-21 | 2015-01-07 | 青岛大学 | Device for eliminating respirable particles by electrostatic spraying |
| CN105499004A (en) * | 2016-01-28 | 2016-04-20 | 东莞市昶源涂装配件有限公司 | Gel anti-curing composite spray gun |
| CN105935634A (en) * | 2016-06-29 | 2016-09-14 | 深圳贵之族生科技有限公司 | Atomization spraying device for viscous liquid |
| FI20175091L (en) * | 2017-02-02 | 2018-08-03 | Ferramill Oy | Injection tool and a method for injection |
| CN107899871A (en) * | 2017-12-12 | 2018-04-13 | 东莞宜安科技股份有限公司 | A kind of AB glue bonding device and AB glue bonding process |
| CN109023554B (en) * | 2018-07-24 | 2021-04-30 | 东华大学 | Liquid jet spinning device and method |
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| US5810254A (en) * | 1996-12-31 | 1998-09-22 | Illnois Tool Works, Inc. | Low pressure polyurethane spraying assembly |
| CN2855543Y (en) * | 2005-12-31 | 2007-01-10 | 西南交通大学 | External mixing and with air type spraying-gun used for two-components and instantaneous mixing reactor |
| US20080185097A1 (en) * | 2007-02-07 | 2008-08-07 | Illinois Tool Works Inc. | Positive displacement plural-component finishing dispenser system and method |
| CN201135938Y (en) * | 2007-12-20 | 2008-10-22 | 北京农业信息技术研究中心 | Air blown electrostatic spray gun |
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