Slit coating device

Abstract

The utility model relates to a slit coating device which comprises a rotating part and a dispensing part, and the rotating part is used for rotating the dispensing part to change the angle of the dispensing part. The glue dispensing part comprises a glue dispensing valve and a glue dispensing needle head, the glue dispensing needle head is fixedly connected with the glue dispensing valve, the whole glue dispensing part can be rotated by the rotating part, the glue dispensing valve can enable glue to pass through the glue dispensing needle head to coat an object to be coated, and a needle opening of the glue dispensing needle head is obliquely arranged in the length direction of the glue dispensing needle head; the glue can flow out through the needle opening of the glue dispensing needle head, and the needle opening of the glue dispensing needle head is obliquely arranged, so that when the slit coating device is used for coating the slit, a coating can be uniformly coated on an object to be coated. Compared with a traditional coating device, the slit coating device provided by the utility model has the advantage that the coating effect of the slit coating device on the slit can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coating, in particular to a slit coating device. Background Art

[0002] With the rapid development of modern industry, during the spraying process of a coating device, the coating valve moves in a straight line, and at the same time, the needle head needs to rotate. It is easy to produce the defect of uneven spraying. Some slit sizes are not much different from the needle head diameter size. When the needle head rotates in the slit, it is necessary to maintain a high concentricity of the needle head. Otherwise, it is easy to scratch the components, which puts high requirements on the shape and position error and assembly error of the needle head and is difficult to achieve. Therefore, there is an urgent need for a slit coating device that can improve the coating effect on the slit. Summary of the Utility Model

[0003] Based on this, the present application provides a slit coating device, which can improve the coating effect of the slit coating device on the slit.

[0004] A slit coating device includes:

[0005] A rotating member;

[0006] A dispensing member, the dispensing member includes a dispensing valve and a dispensing needle head. The dispensing needle head is fixedly connected to the dispensing valve. The needle orifice orientation is inclined with respect to the length direction of the dispensing needle head. The dispensing valve is arranged on the rotating member, and the dispensing member can be rotated as a whole by the rotating member.

[0007] The above-mentioned slit coating device includes a rotating member and a dispensing member. The rotating member is used to rotate the dispensing member to change the angle of the dispensing member. The dispensing member includes a dispensing valve and a dispensing needle head. The dispensing needle head is fixedly connected to the dispensing valve. The dispensing member can be rotated as a whole by the rotating member. The dispensing valve can make glue pass through the dispensing needle head to coat the object to be coated. The needle orifice orientation of the dispensing needle head is inclined with respect to the length direction of the dispensing needle head. Glue can flow out through the needle orifice of the dispensing needle head. The inclined needle orifice orientation can make the coating of the object to be coated uniform when the slit coating device coats the slit. Compared with the traditional coating device, the slit coating device provided by the utility model can improve the coating effect of the slit coating device on the slit by the cooperation of the rotating member and the dispensing member.

[0008] In one embodiment, the dispensing needle head includes a main body section and a needle orifice section. The two ends of the main body section are respectively connected to the dispensing valve and the needle orifice section. The needle orifice is opened at one end of the needle orifice section away from the main body section. The orientation of the needle orifice forms an acute angle or a right angle with the length direction of the main body section away from the dispensing valve.

[0009] In one embodiment, the length of the needle orifice section is less than or equal to 2 mm, and the diameters of the main body section and the needle orifice section are less than or equal to 2 mm.

[0010] In one embodiment, the needle orifice section is arranged in an arc shape.

[0011] In one embodiment, the rotating member includes a rotary servo mechanism and a rotating arm. The rotating arm is rotatably connected to the output end of the rotary servo mechanism. The rotating arm can be driven by the rotary servo mechanism to rotate, and the dispensing valve is connected to the rotating arm.

[0012] In one embodiment, the rotating arm includes a first connecting arm and a second connecting arm connected vertically. The first connecting arm is rotatably connected to the output end of the rotary servo mechanism, and the dispensing valve is fixed to the second connecting arm.

[0013] In one embodiment, the slit coating device further includes an angle detection member. A fitting member is fixed on the first connecting arm. When the first connecting arm rotates to bring the fitting member close to the angle detection member, the angle detection member can be triggered to generate an angle detection signal.

[0014] In one embodiment, the angle detection member is an optocoupler assembly. When the light blocking piece of the fitting member and the first connecting arm rotate, the light blocking piece can extend into the optocoupler assembly to block light.

[0015] In one embodiment, the dispensing member can be rotated as a whole by the rotating member to rotate around a first axis, and the dispensing needle is arranged collinearly with the first axis.

[0016] In one embodiment, the dispensing valve is a plunger type dispensing valve. Description of the Drawings

[0017] The following further describes the present invention in conjunction with the drawings and embodiments, where:

[0018] Figure 1 is a schematic diagram of a slit coating device according to an embodiment;

[0019] Figure 2 is an enlarged view of the needle orifice of a slit coating device according to an embodiment.

[0020] Reference numerals: slit coating device 10; base 20; angle detection member 21; fitting member 23; rotating member 30; rotary servo mechanism 31; rotating arm 32; first connecting arm 321; second connecting arm 322; dispensing member 40; dispensing valve 41; dispensing needle 42; main body section 421; needle orifice section 422 Detailed Description of the Embodiments

[0021] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the drawings. The function of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model. However, it should not be construed as a limitation on the protection scope of the present utility model.

[0022] In the description of the present utility model, the meaning of "a plurality of" is more than two. Understandings such as "greater than", "less than", and "exceeding" do not include the recited number, while understandings such as "above", "below", and "within" include the recited number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence of the indicated technical features.

[0023] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath", and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0024] In the present utility model, unless otherwise clearly defined, terms such as "arranged", "installed", and "connected" should be understood in a broad sense. For example, they can be directly connected, or indirectly connected through an intermediate medium; they can be fixedly connected, or detachably connected, or integrally formed; they can be mechanically connected; they can be the communication inside two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0025] Spraying is a painting method in which the paint is dispersed into uniform and fine droplets through a spray gun or a disc atomizer by means of pressure or centrifugal force and applied to the surface of the object to be painted. It can be divided into air spraying, airless spraying, electrostatic spraying and various derivative methods of the above basic spraying forms, such as high-volume low-pressure atomization spraying, thermal spraying, automatic spraying, multi-group spraying, etc. Spraying operations have high production efficiency, are suitable for manual operations and industrial automation production, and have a wide range of applications, mainly in the fields of hardware, plastics, furniture, military, ships, etc. It is the most commonly used painting method today; spraying operations require a dust-free workshop with a cleanliness level from one million to one hundred. Spraying equipment includes spray guns, spray booths, paint supply rooms, curing furnaces / drying furnaces, spraying workpiece conveying operation equipment, fog elimination and wastewater and waste gas treatment equipment, etc. During the spraying process, the coating valve moves in a straight line, and the needle head also rotates simultaneously. It is easy to produce the defect of uneven spraying. Some slit sizes and needle head diameters are not much different. The needle head needs to maintain a high concentricity when rotating in the slit. Otherwise, it is easy to scratch the components, which puts high requirements on the shape and position error and assembly error of the needle head and is difficult to achieve.

[0026] Reference Figure 1 and Figure 2 To solve the above problems, an embodiment of the present application provides a slit coating device 10, including: a rotating member 30 and a dispensing member 40. The dispensing member 40 includes a dispensing valve 41 and a dispensing needle 42. The dispensing needle 42 is fixedly connected to the dispensing valve 41, and the needle orifice direction is inclined with respect to the length direction of the dispensing needle 42. The dispensing valve 41 is disposed on the rotating member 30, and the dispensing member 40 can be rotated as a whole by the rotating member 30.

[0027] In the slit coating device 10, the slit coating device 10 includes a rotating member 30 and a dispensing member 40. In some embodiments, the slit coating device 10 further includes a base 20. In many cases, a short compression member is called a pier or a base 20, which is generally used for the transition between a foundation or some support members. The base 20 is used to fix the rotating member 30. The rotating member 30 and the dispensing member 40 can be directly or indirectly connected to the base 20 to ensure the stability of the slit coating device 10 during operation. In some embodiments, the rotating member 30 is fixed to the base 20, and the rotating member 30 is used to rotate the dispensing member 40 to change the angle of the dispensing member 40. The change in the angle of the dispensing member 40 can adapt to different requirements when coating different objects to be coated, and can be adjusted according to the size of the object to be coated. The dispensing member 40 includes a dispensing valve 41 and a dispensing needle 42. The dispensing valve 41 is provided on the rotating member 30, and the dispensing needle 42 is fixedly connected to the dispensing valve 41. The dispensing member 40 can be rotated as a whole by the rotating member 30. The dispensing valve 41 can cause glue to be coated on the object to be coated through the dispensing needle 42. The orifice of the dispensing needle 42 is inclined with respect to the length direction of the dispensing needle 42, and the glue can flow out through the orifice of the dispensing needle 42. The orifice of the dispensing needle 42 is inclined. In some embodiments, the orifice of the dispensing needle 42 is inclined upward, that is, the end of the dispensing needle 42 is upward, which is convenient for coating the upper part of the slit. In some embodiments, the orifice of the dispensing needle 42 is inclined downward, that is, the end of the dispensing needle 42 is downward, which is convenient for coating the lower part of the slit. By coating the slit through the dispensing needle 42, when the slit coating device 10 coats the slit, the coating on the object to be coated can be uniform, which can improve the coating effect of the slit coating device 10 on the slit and achieve uniform coating of the slit.

[0028] Refer to Figure 1 and Figure 2, the dispensing needle 42 includes a main body section 421 and a needle tip section 422. The two ends of the main body section 421 are respectively connected to the dispensing valve 41 and the needle tip section 422. The main body section 421 of the dispensing needle 42 serves a connecting function and can also fix the needle tip section 422 of the dispensing needle 42. The dispensing valve 41 is a device used in the optical, optoelectronic, and biochemical industries. In some embodiments, the dispensing valve 41 can be a pneumatic dispensing valve 41. In some embodiments, the dispensing valve 41 is composed of three parts: a cylinder, a valve body, and a material cylinder, which are connected vertically. The cylinder and the valve body are separated by advanced sealing materials to prevent glue from invading the cylinder. The material cylinder and the cylinder are connected to the valve body of the dispensing valve 41 and are concentric with the cylinder. An electromagnetic valve is used to drive the movement of the cylinder, thereby driving the central rod to move up and down. By using the up and down movement of the central rod, the opening and closing of the glue are achieved. According to different opening and closing methods, it can be divided into: plunger type dispensing valve, thimble type dispensing valve, lifting type dispensing valve, spray type dispensing valve, jet type dispensing valve; different switching methods are suitable for different fluids. The back suction type dispensing valve adopts an upward movement to close the glue structure, so that the glue stops and is instantly back-sucked to cut off the glue, reducing the residual glue on the needle tip and preventing phenomena such as dripping and wire drawing during dispensing. The valve body of the glue valve is treated by anodizing aluminum alloy, and the sealing material uses the latest tetrafluoro material. The parts in contact with the colloid are all corrosion-resistant materials. In some embodiments, the dispensing valve 41 can also be an electric dispensing valve 41, including a pump body and a driving part, with a stator provided. The use of a stator-rotor structure design has good sealing performance, and the rotor and stator pair can form a self-sealing structure, which is easy to replace. Through the directional rotation of the rotor in the stator cavity, the medium transportation function is realized. The transportation process does not have any impact on the properties of the medium, and at the same time, the medium back suction function can be easily achieved by reversing the motor to ensure the cleanliness of the medium and materials. In some embodiments, the needle opening is provided at one end of the needle tip section 422 facing away from the main body section 421. In some embodiments, the length of the needle tip section 422 is less than or equal to 2 mm. Specifically, the length of the needle tip section 422 is the length from the end of the main body section 421 close to the needle tip section 422 extending to the end of the needle tip section 422. The diameters of the main body section 421 and the needle tip section 422 are less than or equal to 2 mm. Since coating is carried out in a slit, the slit generally has the effect of being able to coat in a relatively narrow space compared to the painting devices on cars or the curved pipe coating devices in other fields. Therefore, the length of its needle tip section 422 and the diameters of the main body section 421 and the needle tip section 422 are relatively small, and the equipment for spraying large-scale equipment cannot achieve the effect of uniformly spraying the slit. In some embodiments, the needle tip section 422 is arc-shaped. Setting the needle tip section 422 as arc-shaped can prevent the needle tip section 422 from scratching the components.The glue in the dispensing valve 41 can be ejected from the needle orifice, and then spray the article to be coated. The orientation of the needle orifice forms an acute or right angle with the length direction of the main body section 421 away from the dispensing valve 41. Different such angles will affect the spraying range and uniformity. Therefore, during the use of the slit coating device 10, according to the coating requirements, a reasonable and adaptable angle can be selected to make the coating area and the thickness of the coating layer uniform, realize the uniform coating of the slit, and then avoid problems such as paint sagging and dripping, thereby improving the coating effect of the slit coating device 10 on the slit.

[0029] In some embodiments, the rotating member 30 includes a rotary servo mechanism 31 and a rotating arm 32. The rotary servo mechanism 31 is fixed to the base 20. The rotary servo mechanism 31 is a mechanism that converts the rotary motion of the motor into a rocking motion through a cam and a connecting rod. The rotating arm 32 is connected to the output end of the rotary servo mechanism 31. The rotating arm 32 can be driven by the rotary servo mechanism 31 to achieve rotation. In some embodiments, the dispensing valve 41 is connected to the rotating arm 32. The rotary servo mechanism 31 can drive the rotating arm 32, and thus drive the dispensing valve 41 by the rotating arm 32, so that the dispensing valve 41 can rotate, and then coat different areas of the slit, so as to achieve the uniformity of the slit spraying. In some embodiments, the slit coating device 10 may further be provided with a lifting mechanism. The lifting mechanism is connected to the rotating arm 32 and can control the height of the rotating arm 32, and thus achieve the coating of different areas of the object to be coated. In some embodiments, different dispensing needles 42 can be replaced to adapt to different coating scenarios. Specifically, when the slit of the object to be coated is relatively deep, a relatively long dispensing needle 42 can be used; when the slit of the object to be coated is relatively shallow, a relatively short dispensing needle 42 can be used. Usually, the dispensing needle 42 is set to 25 mm to achieve the coating work under normal circumstances. In some embodiments, the rotating arm 32 includes a first connecting arm 321 and a second connecting arm 322 connected vertically. The first connecting arm 321 is rotatably connected to the output end of the rotary servo mechanism 31. The dispensing valve 41 is fixed to the second connecting arm 322. The first connecting arm 321 and the second connecting arm 322 have a connecting function. In some embodiments, the slit coating device 10 further includes an angle detection member 21. In some embodiments, the angle detection member 21 is arranged on the base 20. In some embodiments, the angle detection member 21 can be an angle sensor, and the angle sensor is used to detect the angle. There is a hole in the angle detection member 21, which can cooperate with the shaft, and the angle sensor can count. When rotating in one direction, the count increases, and when the rotation direction changes, the count decreases. The count is related to the initial position of the angle sensor. When initializing the angle sensor, its count value is set to 0. If necessary, the angle detection member 21 can be reset by programming. In some embodiments, the angle detection member 21 can adopt a U-shaped micro photoelectric sensor. The U-shaped micro photoelectric sensor has a compact body and is equipped with three protection circuits, which can minimize the possibility of sensor failure caused by incorrect wiring. The protection circuits include reverse power supply polarity, reverse output polarity and output short circuit. A fitting 23 is fixed on the first connecting arm 321. When the first connecting arm 321 rotates to make the fitting 23 close to the angle detection member 21, the angle detection member 21 can be triggered to generate an angle detection signal. In some embodiments, the first connecting arm 321 rotates relative to the base 20.The large-size operation indicator can be easily viewed from multiple angles. The angle detector 21 is a U-shaped component, and the mating component 23 is located in the middle of the U-shaped component. The angle detector 21 can be used to detect the rotation angle of the dispensing needle 42, facilitating the detection of the rotation of the dispensing needle 42 driven by the rotating arm 32, which is beneficial to better improving the coating effect of the slit coating device on the slit.

[0030] In some embodiments, the angle detection member 21 is an optical coupling component. Optical coupling is a group of devices that use light as a medium to transmit electrical signals. Its function is to maintain good isolation between the input and output of electrical signals at ordinary times, and to enable the transmission of electrical signals through the isolation layer when necessary. When the light shielding sheet of the matching member 23 and the first connecting arm 321 rotate, the light shielding sheet can extend into the optical coupling component to block the light, thereby achieving better isolation between the input and output of the electrical signal. In some embodiments, the light shielding sheet of the matching member 23 and the first connecting arm 321 rotate relative to the base 20, and the optical coupling element can transmit signals between two circuits that do not share a common ground, and there will be no impact even if there is high voltage between the two circuits. Optical coupling elements can be divided into analog and digital types, both of which are composed of a light emitter and a light detector. The light emitter and the light detector are usually integrated into the same package, but there is no electrical or physical connection between them except for the light beam. In some embodiments, the optical coupling element places the light emitting diode and the phototransistor in an opaque package. Photoelectric coupling generally transmits digital signals, but with some technologies, photoelectric coupling elements can also be used to transmit analog signals. In some embodiments, the slit coating device 10 also includes a control circuit board, which is electrically connected to the rotary servo mechanism 31 and the dispensing valve 41, so that the rotary servo mechanism 31 and the dispensing valve 41 play a role in power supply. In some embodiments, the dispensing member 40 can be rotated as a whole by the rotating member 30 to rotate around the first axis, and the dispensing needle 42 is arranged in line with the first axis. When the dispensing member 40 is driven by the rotating member 30 to rotate, the dispensing needle 42 rotates along the axis of rotation of the rotating member 30, which can ensure that the dispensing needle 42 is parallel to the first axis when the dispensing needle 42 rotates. In some embodiments, the dispensing valve 41 is a striker-type dispensing valve, which is a striker-type dispensing valve with a piston rebound self-protection function and is in a closed position under normal conditions. The amount of glue dispensed depends on the length of the valve opening time, the size of the feed pressure, the needle model and the viscosity of the fluid. Under normal circumstances, the precision needle valve needs to be matched with a suitable needle to complete the dispensing action. During the dispensing process, when there is no starting air pressure, the piston and the needle assembly are subjected to the compression force of the spring and are forced downward, so that the needle head is in close contact with the internal flat part of the needle, preventing the fluid from flowing out through the needle, so that the valve is in a closed state. When the needle is not installed, the piston continues to move downward due to the rebound force of the spring compression, and the reducing part of the needle cooperates with the nozzle pad to prevent the fluid from flowing out through the nozzle, achieving the purpose of closing the valve. When a dispensing action is completed, the starting air pressure is reduced or closed, and the piston quickly drives the needle downward under the action of the spring, and the air in the valve body is also discharged from the air inlet, achieving the purpose of clean and rapid glue cutting.If high-precision and efficient dispensing is required, it is generally necessary to use it in combination with a pneumatic dispensing controller. The dispensing time can be set, the dispensing pressure can be adjusted, and the manual or automatic dispensing process can be realized. In some embodiments, the selection of the dispensing needle 42 and the needle orifice is related to the actual application scenario and depends on factors such as the width of the glue line, the amount of glue, and the height of the needle.

[0031] In the slit coating device 10, during use, the operator can control the rotation of the rotating arm 32 by rotating the servo mechanism 31. The rotating arm 32 includes a first connecting arm 321 and a second connecting arm 322 that are vertically connected. Further, the rotation servo mechanism 31 can drive the first connecting arm 321 and the second connecting arm 322 to rotate. Since the dispensing valve 41 is fixed to the second connecting arm 322 and the dispensing valve 41 is provided on the rotating member 30, the rotation of the second connecting arm 322 can drive the dispensing valve 41 to rotate. The dispensing needle 42 is fixedly connected to the dispensing valve 41, and the dispensing member 40 can be rotated as a whole by the rotating member 30. The needle orifice of the dispensing needle 42 is inclined with respect to the length direction of the dispensing needle 42. An angle detection member 21 is provided on the base 20, and a mating member 23 is fixed on the first connecting arm 321. When the first connecting arm 321 rotates relative to the base 20 and the mating member 23 approaches the angle detection member 21, the angle detection member 21 can be triggered to generate an angle detection signal, thereby detecting whether the rotation of the first connecting arm 321 relative to the base 20 meets the operation requirements, which is beneficial to further debugging the rotating member 30 to better coat the slit according to the requirements, and then improving the coating effect of the slit coating device 10 on the slit. The angle detection member 21 is an optocoupler assembly. When the light blocking piece of the mating member 23 and the first connecting arm 321 rotate relative to the base 20, the light blocking piece can extend into the optocoupler assembly to block the light. The control circuit board is electrically connected to the rotation servo motor and the dispensing valve 41 to supply power to the rotation servo motor and the dispensing valve 41, thereby ensuring the normal use of the slit coating device 10, improving the coating effect of the slit coating device 10 on the slit, and realizing uniform coating of the slit.

[0032] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0033] The above-described embodiments only represent several implementation manners of the present invention, and the description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A slit coating device, characterized in that, Comprising: A rotating member; A dispensing member, the dispensing member comprising a dispensing valve and a dispensing needle, the dispensing needle being fixedly connected to the dispensing valve, the orientation of the needle orifice being inclined with respect to the length direction of the dispensing needle, the dispensing valve being provided on the rotating member, and the dispensing member being capable of being rotated integrally by the rotating member; The rotating member comprises a rotary servo mechanism and a rotating arm, the rotating arm being rotatably connected to the output end of the rotary servo mechanism, the rotating arm being capable of being driven by the rotary servo mechanism to effect rotation, and the dispensing valve being connected to the rotating arm; The rotating arm comprises a first connecting arm and a second connecting arm connected perpendicularly, the first connecting arm being rotatably connected to the output end of the rotary servo mechanism, and the dispensing valve being fixed to the second connecting arm; An angle detection member, a mating member being fixed to the first connecting arm, and when the first connecting arm rotates to bring the mating member close to the angle detection member, the angle detection member can be triggered to generate an angle detection signal.

2. The slit coating device according to claim 1, characterized in that The dispensing needle comprises a main body section and a needle orifice section, the two ends of the main body section being respectively connected to the dispensing valve and the needle orifice section, the needle orifice being formed at one end of the needle orifice section facing away from the main body section, and the orientation of the needle orifice forming an acute or right angle with the length direction of the main body section away from the dispensing valve.

3. The slit coating device according to claim 2, characterized in that, The length of the needle orifice section is less than or equal to 2 mm, and the diameters of the main body section and the needle orifice section are less than or equal to 2 mm.

4. The slit coating device according to claim 2, characterized in that, The needle orifice section is arc-shaped.

5. The slit coating device according to claim 4, wherein, The angle detection member is an optocoupler assembly, and when the light blocking piece of the mating member and the first connecting arm rotate, the light blocking piece can extend into the optocoupler assembly to block light.

6. The slit coating device according to claim 1, wherein The dispensing member can be rotated integrally by the rotating member to rotate about a first axis, and the dispensing needle is arranged collinearly with the first axis.

7. The slit coating device according to claim 1, characterized in that, The dispensing valve is a plunger type dispensing valve.

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