阅读说明：本技术 一种旋杯式静电喷涂系统的送料装置及送料方法 (Feeding device and feeding method of rotary cup type electrostatic spraying system ) 是由 周南平 张志武 于 2019-10-10 设计创作，主要内容包括：本发明属于涂料喷涂技术领域,提出一种旋杯式静电喷涂系统的送料装置及送料方法。提出的一种旋杯式静电喷涂系统的送料送料装置具有缸体；缸体具有两个上下设置的空腔；液体活塞腔、涂料腔；液体活塞腔与涂料腔之间设置有作为二级活塞的金属箔；金属箔为在压力作用下产生变形对所述的涂料腔进行压缩的结构；液体活塞腔由两个不同直径且相互连通的腔体Ⅰ和腔体Ⅱ构成,腔体Ⅰ内设置有用以对其内的液体进行压缩的一级活塞；涂料腔具有进料口、出料口；进料口与涂料桶相连通；出料口连通旋杯式喷枪。本发明避免了水性特氟龙涂料在机械硬挤压下累积成块现象的发生,保证了旋杯式静电喷涂系统的正常运行。(The invention belongs to the technical field of paint spraying, and provides a feeding device and a feeding method of a rotary cup type electrostatic spraying system. The feeding device of the rotary cup type electrostatic spraying system is provided with a cylinder body; the cylinder body is provided with two cavities which are arranged up and down; a liquid piston cavity, a paint cavity; a metal foil serving as a secondary piston is arranged between the liquid piston cavity and the coating cavity; the metal foil is a structure which deforms under the action of pressure to compress the coating cavity; the liquid piston cavity is composed of a cavity body I and a cavity body II which have different diameters and are mutually communicated, and a primary piston used for compressing liquid in the cavity body I is arranged in the cavity body I; the coating cavity is provided with a feeding hole and a discharging hole; the feeding hole is communicated with the coating bucket; the discharge port is communicated with the rotary cup type spray gun. The invention avoids the phenomenon that the water-based Teflon coating is accumulated into blocks under the mechanical hard extrusion, and ensures the normal operation of the rotary cup type electrostatic spraying system.)

1. The utility model provides a revolve feeding unit of cup formula electrostatic spraying system which characterized in that: the feeding device is provided with a cylinder body; the cylinder body is provided with two cavities which are arranged up and down; the upper cavity is a liquid piston cavity, and the lower cavity is a coating cavity; a metal foil for isolating and sealing the liquid piston cavity and the coating cavity is arranged between the liquid piston cavity and the coating cavity; the metal foil forms a secondary piston; the metal foil deforms under the action of pressure to compress the coating cavity; the liquid piston cavity is composed of a cavity I and a cavity II which have different diameters and are mutually communicated, the cavity II is positioned at the lower part of the cavity I, and the diameter of the cavity I is smaller than that of the cavity II; a primary piston for compressing liquid in the cavity I is arranged in the cavity I, and the primary piston can move up and down in the cavity I; a driving mechanism is arranged corresponding to the primary piston; the coating cavity is provided with a feeding hole and a discharging hole; the feeding hole is communicated with the coating bucket; the discharge hole is communicated with the rotary cup type spray gun; the primary piston moves downwards in the liquid piston cavity under the action of the driving mechanism to compress liquid in the liquid piston cylinder, so that the secondary piston formed by metal foils deforms downwards to push the coating in the coating cavity to feed from the discharge port to the rotary cup type spray gun; the primary piston moves upwards in the liquid piston cavity under the action of the driving mechanism, so that the secondary piston formed by the metal foil is restored to the original shape, the coating in the coating bucket fills the coating cavity, and a feeding process is completed.

2. The feeding device of the rotary-cup type electrostatic spraying system as claimed in claim 1, wherein: the cylinder body of the feeding device comprises an upper cylinder body and a lower cylinder body which are mutually independent; the upper cylinder body is a cylinder body of a liquid piston cavity; the lower cylinder body is a cylinder body of a coating cavity; a secondary piston formed by metal foils is arranged between the upper cylinder body and the lower cylinder body; the upper cylinder body and the lower cylinder body are connected into a whole through sealing.

3. The feeding device of the rotary-cup type electrostatic spraying system as claimed in claim 1, wherein: the metal foil is fixedly connected with the cylinder body of the coating cavity; and the deformation amount of the metal foil which deforms under the action of pressure is reserved when the metal foil is fixedly connected with the cylinder body of the coating cavity.

4. The feeding device of the rotary-cup type electrostatic spraying system as claimed in claim 1, wherein: the metal foil is stainless steel foil.

5. The feeding device of the rotary-cup type electrostatic spraying system as claimed in claim 1, wherein: a switching valve I is arranged at the feeding hole of the coating cavity; a switching valve II is arranged at the discharge hole of the coating cavity; the switching valve I and the switching valve II are mutually locked, namely the switching valve II is closed when the switching valve I is opened, and the switching valve II is opened when the switching valve I is closed.

6. The feeding device of the rotary-cup type electrostatic spraying system as claimed in claim 1, wherein: the top of cylinder body has the moisturizing chamber, the moisturizing chamber be provided with the translucent cover body that is used for conveniently observing the moisturizing intracavity water yield.

7. The feeding device of the rotary-cup type electrostatic spraying system as claimed in claim 1, wherein: the two groups of feeding devices alternately supply materials to the rotary cup type spray gun to realize the charging of one group of feeding devices, and the other group of feeding devices continuously feed materials to the rotary cup type spray gun.

8. the method for feeding by using the feeding device of the rotary cup type electrostatic spraying system as claimed in any one of claims 1 to 7, wherein the method comprises the following steps: in an initial state, the coating bucket feeds materials to a coating cavity of the feeding device, and the feeding hole is closed when the materials are full; a first-stage piston in the feeding device descends to compress a metal foil serving as a second-stage piston to generate deformation; the metal foil as the secondary piston deforms to push the coating in the coating cavity to feed from the discharge hole to the rotary cup type spray gun; the primary piston in the feeding device drives the metal foil as the secondary piston to recover the initial form; the coating barrel is used for filling the coating cavity through the feeding hole, so that a feeding process is completed; when the primary piston moves downwards, the feed port of the coating cavity is in a closed state, and the discharge port of the coating cavity is in an open state; when the primary piston moves upwards, the feed inlet of the coating cavity is in an open state, and the discharge outlet of the coating cavity is in a closed state, namely the feed inlet and the discharge outlet of the coating cavity are in an interlocking structure.

Technical Field

The invention belongs to the technical field of paint spraying, and particularly relates to a feeding device and a feeding method of a rotary cup type electrostatic spraying system.

Background

At present, two main spraying methods are adopted for spraying the liquid coating:

A spray method is an air spray gun spray method, namely the liquid coating is sprayed out through the spray orifice with small caliber under high pressure, the coating is atomized when sprayed out, the atomized coating is sprayed on the product to generate a coating, the coating is cured at high temperature in an oven, and the caliber of the spray orifice is adjusted, so that the quantity of the sprayed coating is adjusted, and the thickness of the coating is controlled.

The other spraying method of the liquid coating is to adopt a rotary cup type electrostatic spraying system to carry out electrostatic spraying; the rotary cup type electrostatic spraying system comprises a rotary cup type spray gun, an electrostatic generator and a coating feeding device; the coating feeding device is connected with the coating bucket and the rotary cup type spray gun; after the coating enters the rotary cup type spray gun, the liquid coating is atomized by the rotary cup type spray gun rotating at high speed at the front end of the spray gun mouth; the electrostatic generator makes the coating carry static electricity, the coating with the static electricity is atomized and then sprayed to the workpiece, so that the coating is generated on the workpiece, and the coating is cured and formed at high temperature; the electrostatic generator is arranged to endow the coating particles with positive charges or negative charges, so that the atomized coating sprayed from the rotary cup is charged with static electricity, the workpiece to be coated is in a grounding state, the atomized coating is easily adsorbed to the workpiece to be coated by the static electricity, the air-supply rate and uniformity of the sprayed atomized coating are increased, the consistency of the coating thickness of the workpiece to be coated and the smoothness of the coating are increased, a part of the sprayed atomized coating is prevented from running into the unnecessary air, and the waste and the pollution of the coating are reduced.

Compared with an air spray gun, the spray coating of the product aiming at the non-concave surface; the rotary cup type electrostatic spray gun has obvious advantages in the thickness consistency, the surface smoothness, the painting rate and the fineness of paint atomization of a coating on a sprayed product; for example: the rotary cup type electrostatic spraying technology is uniformly adopted for spraying the automobile body with higher coating quality requirement.

A coating feeding device in the rotary cup type electrostatic spraying system adopts a high-precision gear pump structure in the industry, and the coating is conveyed to a rotary cup type spray gun through the high-precision gear pump; the gear pump structure is suitable for conveying most of coatings, and is also suitable for conveying oily Teflon coatings, but the oily Teflon coatings have the problem of pollution, and with the increasing requirements of the country on environmental protection, a material capable of replacing the oily Teflon coatings is required to be found, so that the superiority of the water-based Teflon coating material is brought out; the water-based Teflon material is a small granular plastic product, and in the process of conveying the water-based Teflon coating to a rotary cup type spray gun by using a high-precision gear pump, as the meshing extrusion between teeth of the gear pump is mechanical extrusion, namely hard extrusion, the water-based Teflon coating can be accumulated into blocks under the hard extrusion, and the accumulated water-based Teflon coating is adhered to the teeth of the gear pump, so that the gear pump is interrupted and stops working.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide a feeding device and a feeding method of a rotary cup type electrostatic spraying system.

The invention adopts the following technical scheme for achieving the purpose:

A feeding device of a rotary cup type electrostatic spraying system is provided with a cylinder body; the cylinder body is provided with two cavities which are arranged up and down; the upper cavity is a liquid piston cavity, and the lower cavity is a coating cavity; a metal foil for isolating and sealing the liquid piston cavity and the coating cavity is arranged between the liquid piston cavity and the coating cavity; the metal foil forms a secondary piston; the metal foil deforms under the action of pressure to compress the coating cavity; the liquid piston cavity is composed of a cavity I and a cavity II which have different diameters and are mutually communicated, the cavity II is positioned at the lower part of the cavity I, and the diameter of the cavity I is smaller than that of the cavity II; a primary piston for compressing liquid in the cavity I is arranged in the cavity I, and the primary piston can move up and down in the cavity I; a driving mechanism is arranged corresponding to the primary piston; the coating cavity is provided with a feeding hole and a discharging hole; the feeding hole is communicated with the coating bucket; the discharge hole is communicated with the rotary cup type spray gun; the primary piston moves downwards in the liquid piston cavity under the action of the driving mechanism to compress liquid in the liquid piston cylinder, so that the secondary piston formed by metal foils deforms downwards to push the coating in the coating cavity to feed from the discharge port to the rotary cup type spray gun; the primary piston moves upwards in the liquid piston cavity under the action of the driving mechanism, the secondary piston formed by the metal foil restores to the original shape, and the paint in the paint bucket fills the paint cavity to finish a feeding process.

the cylinder body of the feeding device comprises an upper cylinder body and a lower cylinder body which are mutually independent; the upper cylinder body is a cylinder body of a liquid piston cavity; the lower cylinder body is a cylinder body of a coating cavity; a secondary piston formed by metal foils is arranged between the upper cylinder body and the lower cylinder body; the upper cylinder body and the lower cylinder body are connected into a whole through sealing.

The metal foil is fixedly connected with the cylinder body of the coating cavity; and the deformation amount of the metal foil which deforms under the action of pressure is reserved when the metal foil is fixedly connected with the cylinder body of the coating cavity.

The metal foil is stainless steel foil.

A switching valve I is arranged at the feeding hole of the coating cavity; a switching valve II is arranged at the discharge hole of the coating cavity; the switching valve I and the switching valve II are mutually locked, namely the switching valve II is closed when the switching valve I is opened, and the switching valve II is opened when the switching valve I is closed.

The top of the cylinder body is provided with a water replenishing cavity.

The moisturizing chamber be provided with the translucent cover body for conveniently observe the water yield of moisturizing intracavity.

The driving mechanism comprises a servo motor, a servo controller and an electric push rod.

the method for feeding by using the feeding device of the rotary cup type electrostatic spraying system comprises the steps that in an initial state, a coating barrel feeds materials to a coating cavity of the feeding device, and a feeding hole is closed when the materials are full; a first-stage piston in the feeding device descends to compress a metal foil serving as a second-stage piston to generate deformation; the metal foil as the secondary piston deforms to push the coating in the coating cavity to feed from the discharge hole to the rotary cup type spray gun; the primary piston in the feeding device drives the metal foil as the secondary piston to recover the initial form; the coating barrel is used for filling the coating cavity through the feeding hole, so that a feeding process is completed; when the primary piston moves downwards, the feed port of the coating cavity is in a closed state, and the discharge port of the coating cavity is in an open state; when the primary piston moves upwards, the feed inlet of the coating cavity is in an open state, and the discharge outlet of the coating cavity is in a closed state, namely the feed inlet and the discharge outlet of the coating cavity are in an interlocking structure.

The two groups of feeding devices alternately supply materials to the rotary cup type spray gun to realize the charging of one group of feeding devices, and the other group of feeding devices continuously feed materials to the rotary cup type spray gun.

According to the feeding method and the feeding device of the rotary cup type electrostatic spraying system, the secondary piston formed by the metal foil is adopted, and under the coordination of the primary piston, the coating cavity is compressed through the deformation of the metal foil forming the secondary piston under the action of pressure, and the rotary cup type spray gun is supplied with materials through the discharge hole of the coating cavity, so that the phenomenon that the water-based Teflon coating is accumulated into blocks under the mechanical hard extrusion is avoided, and the normal operation of the rotary cup type electrostatic spraying system is ensured; the continuous feeding of the rotary cup type spray gun is realized through the mutual matching of a group of two feeding mechanism devices.

Drawings

FIG. 1 is a diagram showing the state of use of the discharge of the present invention.

FIG. 2 is a diagram showing the use of the feed according to the present invention.

Fig. 3 is an overall use state diagram of the present invention.

Fig. 4 is a working principle diagram of the rotary cup type electrostatic spraying system.

In the figure: 1. the coating machine comprises a control box, 2, an electric push rod, 3, a connector, 4, a connecting rod, 5, a primary piston, 6, a conveying device box, 7, a conveying device, 8, switching valves I and 9, switching valves II and 10, metal foils, 11, a sealing ring, 12, an upper cylinder body, 13, a lower cylinder body, 14, a transparent cover body, 16, a communicating pipe, 17, a liquid piston cavity, 18, a coating cavity, 19, a rotary cup type spray gun, 20 and a coating barrel.

Detailed Description

The invention is described with reference to the accompanying drawings and the specific embodiments, and the document only relates to the structural design of the paint feeding device, not to the structure of the rotary cup type spray gun and the structural design of the control box;