Spray gun nozzle of thin film capacitor

Abstract

The utility model discloses a spray gun nozzle of a thin film capacitor, which comprises a shell, a blowing head fixed at the bottom of the shell, and a protective cover fixed at the lower part of the shell and covering the blowing head inside the protective cover, a sealing connecting sleeve is arranged at the fixed joint between the shell and the protective cover, and an air head and two nozzles are arranged at the upper part of the shell. The air head is located in the center of the shell, the two nozzles are symmetrically and obliquely inserted into the shell, nozzle heads of the two nozzles extend downwards into the blowing head and are close to the center of the shell but do not make contact with each other, and extending arcing points of the two nozzles are located between the lower end face of the blowing head and the lower end face of the protective cover. According to the spray gun, the gun nozzle adopting the design principle of one inlet and one outlet is arranged on the spray gun, so that gas can enter from the gas hole of the gun nozzle, is intensively sprayed out from the gas head at the tail end of the gas hole, and blows away metal liquid from the middle of the two nozzles to form metal particles, and the dispersity and the uniformity of the metal particles can be effectively ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of capacitor gold spraying, in particular to a spray gun nozzle of a film capacitor. Background Art

[0002] In the processing of film capacitors, metal coating is usually sprayed onto the cross section of the cylindrical film capacitor core by a spray gun. When spraying, the spray trajectory of the metal coating is generally required to be perpendicular to the end face of the core to prevent the sprayed gold coating from flowing to one side, causing uneven thickness or even forming a striped coating, which affects the electrical connection effect with each layer of film. However, the current spray gun spraying effect is poor, and the metal coating cannot be evenly attached to the surface of the capacitor, affecting the quality and performance of the product. Summary of the invention

[0003] In view of this, the utility model provides a spray gun nozzle for a film capacitor to solve the problems existing in the above-mentioned background technology.

[0004] A spray gun nozzle for a film capacitor comprises a shell, a blowing head fixed to the bottom of the shell, and a shield fixed to the lower part of the shell and covering the blowing head therein; a sealing connection sleeve is provided at the fixed connection between the shell and the shield; a receiving cavity is provided at the lower part of the shell; an air hole connected to the receiving cavity is vertically opened downward in the center of the upper part of the shell; an air head is provided at one end of the air hole facing the receiving cavity; two inclined pipe holes connected to the receiving cavity are symmetrically provided on the shell on both sides of the air hole; a nozzle is inserted in each pipe hole; the nozzles of the two nozzles extend downward into the blowing head and approach the center but do not touch each other, and the extended arc starting points of the two nozzles are located between the lower end surface of the blowing head and the lower end surface of the shield.

[0005] Preferably, the distance L1 between the two nozzle tips is greater than the distance L2 between the extended arc starting points of the two nozzles and the lower end surface of the shield.

[0006] Preferably, the distance L1 between the two nozzle tips is 2-3.5 mm.

[0007] Preferably, the distance L2 between the extended arc starting points of the two nozzles and the lower end surface of the shield is 0-2 mm.

[0008] Preferably, an O-ring is also embedded on the top of the housing.

[0009] Preferably, the air head is a boss-like structure, and the diameter of the central air passage of the air head is not less than the distance L1 between the two nozzle tips.

[0010] Preferably, the blowing head is a ceramic blowing head.

[0011] The beneficial effects of the utility model are:

[0012] 1. By setting a nozzle with one inlet and one outlet design principle on the spray gun, the gas can enter from the air hole of the nozzle, and be concentratedly sprayed out from the air head at the end of the air hole, and the metal liquid is blown from between the two nozzles to form metal particles, which can effectively ensure the dispersion and uniformity of the metal particles.

[0013] 2. The utility model sets the extended arc starting point A of the two nozzles between the lower end surface of the blowing head and the lower end surface of the shield, which can not only ensure the dispersion and uniformity of the metal particles and improve the gold spraying effect, but also avoid the excessive dispersion of the metal particles and affect the gold spraying effect under the guiding and blocking effect of the shield; at the same time, under the protective effect of the shield, it can also avoid the sprayed high-temperature metal particles from causing damage to other equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the structure of the entire spray gun.

[0016] Figure 2 It is a structural diagram of the wire feeding power mechanism.

[0017] Figure 3 It is a schematic diagram of the structure of the guidewire assembly.

[0018] Figure 4 It is a schematic diagram of the structure of the gun body.

[0019] Figure 5 It is a structural diagram of the conductive mechanism.

[0020] Figure 6 It is a structural diagram of the conductive mechanism.

[0021] Figure 7 This is a schematic diagram of the structure of the gun nozzle.

[0022] Figure 8 This is a cross-sectional view of the gun muzzle.

[0023] Fig. 9 It is a schematic diagram of the structure of the gun nozzle shell.

[0024] The meanings of the numbers in the figure are:

[0025] 1 is the gun body, 1-1 is the groove, 1-2 is the gas channel, and 1-3 is the fixing hole;

[0026] 2 is a wire feeding mechanism, 2-1 is a first wire guide tube, 2-2 is a second wire guide tube, 2-3 is a motor, 2-4 is a first bevel gear, 2-5 is a second bevel gear, 2-6 is a transmission shaft, 2-7 is an active wire feeding gear, 2-8 is a driven wire feeding gear, 2-9 is a gear mounting frame, 2-10 is a fixed core shaft, 2-11 is an adjustment column, and 2-12 is a wire guide connector;

[0027] 3 is a conductive mechanism, 3-1 is a connecting column, 3-2 is a first connecting conductive bar, 3-3 is a second connecting conductive bar, 3-4 is a brush connecting bar, and 3-5 is a brush cover;

[0028] 4 is a cover plate;

[0029] 5 is a gun nozzle, 5-1 is a shell, 5-2 is a blowing head, 5-3 is a shield, 5-4 is a sealing connection sleeve, 5-5 is an air head, 5-6 is a nozzle, 5-7 is a receiving cavity, 5-8 is an air hole, 5-9 is a pipe hole, and 5-10 is an O-shaped sealing ring;

[0030] 6 is the gold-spraying. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is described below by specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0032] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. The singular forms of "a", "said" and "the" used in this disclosure and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0033] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] In the description of the present utility model, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection of two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0035] In order to better understand the technical solution of the present invention, the present invention is described in detail below with reference to the accompanying drawings.

[0036] The utility model provides a spray gun nozzle for a film capacitor. The nozzle is fixed at the bottom of a gun body of the capacitor spray gun. The nozzle adopts a design principle of one inlet and one outlet, so that gas can enter from an air hole of the nozzle and be concentratedly sprayed out from an air head at the end of the air hole, and metal liquid is blown from between two nozzles to form metal particles, thereby effectively ensuring the dispersion and uniformity of the metal particles.

[0037] In order to facilitate the understanding of the spray gun nozzle of the present invention, the structure of the capacitor spray gun is introduced below.

[0038] The capacitor spray gun comprises a gun body 1, a wire feeding mechanism 2 symmetrically arranged on the left and right sides of the gun body 1, a conductive mechanism 3 arranged outside the wire feeding mechanism 2 to energize the gold spray wire 6 transported by the wire feeding mechanism 2, a cover plate 4 arranged on both sides of the gun body 1 to cover the wire feeding mechanism 2 and the conductive mechanism 3 in the gun body, and a gun nozzle 5 arranged at the bottom of the gun body 1.

[0039] The gun body 1 is used to fix the wire feeding mechanism 2 , the conductive mechanism 3 and the gun nozzle 5 .

[0040] The left and right sides of the gun body 1 are provided with grooves 1-1 for accommodating the wire feeding mechanism 2 and the conductive mechanism 3. When the wire feeding mechanism 2 and the conductive mechanism 3 are installed in the grooves 1-1, the cover plate 4 is buckled on both sides of the gun body 1, so that the wire feeding mechanism 2 and the conductive mechanism 3 can be covered and wrapped in the gun body to prevent them from being touched, thereby playing a certain safety role.

[0041] A gas channel 1-2 is provided at the top center of the gun body 1, which runs downward and is connected to the air hole 5-8 in the center of the gun nozzle 5. The gas channel 1-2 is connected to an air pipe joint, and air can be supplied to the spray gun by controlling the solenoid valve. The air flow passes through the air pipe joint, the gas channel 1-2 and the air hole 5-8 in turn, and is concentratedly sprayed out from the air head 5-5 at the end of the air hole 5-8 to blow away the gold spray particles and evenly attach them to the two ends of the film capacitor.

[0042] The top of the gun body 1 is also provided with a fixing hole 1 - 3 for fixing the guide wire connector 2 - 12 of the guide wire assembly and the connecting column 3 - 1 of the conductive mechanism 3 .

[0043] The wire feeding mechanism 2 includes a wire guide assembly and a wire feeding power mechanism, and the wire guide assembly and the wire feeding power mechanism cooperate to feed the gold spraying wire to the gun nozzle 5 at the lower end of the gun body 1 .

[0044] The guide wire assembly includes a guide wire connector 2-12, a first guide wire tube 2-1 connected to the guide wire connector 2-12, and a second guide wire tube 2-2. The gold-spraying wire 6 passes through the first guide wire tube 2-1 and the second guide wire tube 2-2 and enters the nozzle 5-6 and extends from the nozzle 5-6.

[0045] In order to make the wire feeding smoother, the present application designs a wire feeding path with the smallest curvature, that is, the wire guide connector 2-12 is fixed in the fixing hole 1-3 at the top of the gun body 1, the first wire guide tube 2-1 is connected to the wire guide connector 2-12, and then the second wire guide tube 2-2 is fixed on the gun body structure directly below the first wire guide tube 2-1. After the second wire guide tube 2-2 is installed, it is connected with the nozzle 5-6 of the gun nozzle 5, so that the gold-spraying wire can be vertically fed downward into the gun nozzle 5, and then extended from its mouth through the inclined gun nozzle 5.

[0046] The wire feeding power mechanism is used to provide power to transport the gold-spraying wire downward. The wire feeding power mechanism includes a motor 2-3 fixed on the gun body 1, a first bevel gear 2-4 fixed on the output end of the motor 2-3, a second bevel gear 2-5 fixed on the transmission shaft 2-6 and meshed with the first bevel gear 2-4, an active wire feeding gear 2-7 fixed on the transmission shaft 2-6 and located on both sides of the second bevel gear 2-5, and a driven wire feeding gear 2-8 meshed with the active wire feeding gear 2-7, the driven wire feeding gear 2-8 is fixed on the gear mounting frame 2-9, and the gear mounting frame 2-9 is fixed to the gun body 1 through a fixed mandrel 2-10. An annular groove is provided on the active wire feeding gear 2-7, and the gold-spraying wire 6 is embedded in the annular groove. Specifically, the annular groove is provided on the copper sleeve brush of the active wire feeding gear 2-7, and the groove depth of the annular groove is not greater than the diameter of the gold-spraying wire.

[0047] Start the motor 2-3, the motor 2-3 can drive the first bevel gear 2-4 to rotate, because the first bevel gear 2-4 is meshed with the second bevel gear 2-5, the second bevel gear 2-5 rotates synchronously, so that the two active wire feeding gears 2-7 coaxial with the second bevel gear 2-5 also rotate synchronously, and the active wire feeding gear 2-7 can drive the driven wire feeding gear 2-8 to rotate, so that the left and right gold-spraying wires can be transmitted downward under the action of friction.

[0048] The wire feeding power mechanism can realize synchronous transmission of the two left and right gold spraying wires by using a motor 2-3, and the wire feeding rates on both sides are stable and consistent, which can effectively ensure the gold spraying efficiency and quality.

[0049] Since the driven wire feeding gear 2-8 is fixed on the gear mounting frame 2-9, the distance between the driven wire feeding gear 2-8 and the copper sleeve brush of the active wire feeding gear 2-7 can be adjusted by adjusting the adjustment column 2-11 on the gear mounting frame 2-9 to adapt to the gold-spraying wires of different diameters.

[0050] The conductive mechanism 3 includes a connecting column 3-1 embedded in the top of the gun body 1, a first connecting conductive strip 3-2 connected to the connecting column 3-1, a second connecting conductive strip 3-3 in contact with the first connecting conductive strip 3-2, a brush connecting strip 3-4 in contact with the second connecting conductive strip 3-3, and a brush cover 3-5 in contact with the brush connecting strip 3-4, and the carbon brush rod inside the brush cover 3-5 is in contact with the copper brush cover of the active wire feeding gear 2-7.

[0051] When the connection column 3-1 is connected to the power supply through the cable, the connection column 3-1 is charged. Since the connection column 3-1 is connected to the first connection conductive strip 3-2, the first connection conductive strip 3-2 is in contact with the second connection conductive strip 3-3, the second connection conductive strip 3-3 is in contact with the brush connection strip 3-4, and the brush connection strip 3-4 is in contact with the brush cover 3-5, the brush cover 3-5 can be energized, and the brush cover 3-5 transmits electricity to the copper sleeve brush of the active wire feeding gear 2-7 through the carbon brush rod inside it, and the copper sleeve brush of the active wire feeding gear 2-7 then transmits electricity to the gold spray wire, so that the gold spray wire is charged. Under the high-voltage environment, the currents of the left and right gold spray wires collide, generating high temperature, which can melt the gold spray wire instantly to form metal liquid. The metal liquid is evenly blown into metal particles under the action of the high-pressure gas blown from the gas head and then sprayed from the gun nozzle 5 and attached to the surface of the capacitor.

[0052] The spray gun nozzle 5 of the utility model comprises a shell 5-1, a blowing head 5-2 fixed at the bottom of the shell 5-1, and a shield 5-3 fixed at the lower part of the shell 5-1 and covering the blowing head 5-2 therein, and a sealing connection sleeve 5-4 is provided at the fixed connection between the shell 5-1 and the shield 5-3.

[0053] An air head 5-5 and two nozzles 5-6 are provided on the upper part of the shell 5-1. The air head 5-5 is located in the center of the shell 5-1. The two nozzles 5-6 are symmetrically and obliquely inserted into the shell 5-1 and their respective nozzles extend downward into the blowing head 5-2 and approach the center of the shell but do not touch each other. The extended arc starting points of the two nozzles 5-6 are located between the lower end surface of the blowing head 5-2 and the lower end surface of the shield 5-3.

[0054] Specifically, a accommodating chamber 5-7 is provided at the lower portion of the shell 5-1, and an air hole 5-8 connected to the accommodating chamber 5-7 is vertically opened downward in the center of the upper portion of the shell 5-1, and an air head 5-5 is provided at one end of the air hole 5-8 facing the accommodating chamber 5-7, and two inclined tube holes 5-9 connected to the accommodating chamber 5-7 are symmetrically provided on both sides of the air hole 5-8, and the angles between the center lines of the left and right tube holes 5-9 and the center line of the air hole 5-8 are equal, and a nozzle 5-6 is inserted in each tube hole 5-9.

[0055] The nozzles of the left and right nozzles 5-6 extend downward through the accommodating cavity 5-7 and then extend into the blowing head 5-2. A gold spraying wire is arranged in each nozzle 5-6 and extends from the front end of the nozzle. When the left and right gold spraying wires melt into metal liquid under high temperature, the compressed gas blows the metal liquid from the middle of the two nozzles to form metal particles, which can effectively ensure the dispersion and uniformity of the metal particles. At the same time, the extended arc starting point A of the two nozzles 5-6 is arranged between the lower end surface of the blowing head 5-2 and the lower end surface of the shield 5-3. Under the guiding and blocking effect of the shield 5-3, it can also prevent the metal particles from being too dispersed and affecting the gold spraying effect.

[0056] In order to ensure the dispersion and spraying uniformity of the metal particles, the distance L1 between the nozzles of the two nozzles 5-6 is greater than the distance L2 between the extended arc starting points A of the two nozzles 5-6 and the lower end surface of the shield 5-3.

[0057] The arc starting point of the gold spray wire is particularly important in the gold spraying process, and has a huge impact on the gold spraying effect. Preferably, in this embodiment, the distance L1 between the nozzles of the two nozzles 5-6 is 2-3.5 mm, and the distance L2 between the extended arc starting point A of the two nozzles 5-6 and the lower end surface of the shield 5-3 is 0-2 mm.

[0058] The air head 5-5 disposed at the end of the air hole 5-8 can not only lengthen the ventilation channel, but also facilitate the control of the gold spraying effect. The air head 5-5 is a boss-shaped structure, and the diameter of the central airway of the air head 5-5 is not less than the distance L1 between the two nozzles 5-6.

[0059] The blowing head 2 is a ceramic blowing head, which plays a protective role to prevent the high temperature of the gold spray wire from damaging other parts of the spray gun. The gold spray wire is usually made of zinc or zinc-tin alloy, and the melting point of such materials is not very high, usually not exceeding 500°C, while the melting point of ceramics is generally above 2000°C.

[0060] An O-ring 5-10 is also embedded on the top of the shell 5-1, and the O-ring 5-10 surrounds the air hole 5-8, so that when the gun nozzle 5 is fixed to the bottom of the gun body 1, the tightness of the connection can be effectively guaranteed.

[0061] It should be clear that the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Claims

1. A spray gun nozzle for a film capacitor, characterized in that: The invention comprises a shell (5-1), a blowing head (5-2) fixed at the bottom of the shell (5-1), and a protective cover (5-3) fixed at the lower part of the shell (5-1) and covering the blowing head (5-2) therein; a sealing connection sleeve (5-4) is provided at the fixed connection between the shell (5-1) and the protective cover (5-3); a receiving cavity (5-7) is provided at the lower part of the shell (5-1); an air hole (5-8) connected to the receiving cavity (5-7) is vertically opened downward at the center of the upper part of the shell (5-1); the air hole (5-8) is oriented in the direction of An air head (5-5) is arranged at one end of the accommodating cavity (5-7), and two inclined tube holes (5-9) in communication with the accommodating cavity (5-7) are symmetrically arranged on the shell body at both sides of the air hole (5-8), and a nozzle (5-6) is inserted in each tube hole (5-9), and the nozzles of the two nozzles (5-6) extend downward into the blowing head (5-2) and approach the center of the shell body but do not contact each other, and the extended arc starting points of the two nozzles (5-6) are located between the lower end surface of the blowing head (5-2) and the lower end surface of the protective cover (5-3).

2. The spray gun nozzle for film capacitor according to claim 1, characterized in that: The distance L1 between the nozzle tips of the two nozzles (5-6) is greater than the distance L2 between the extended arc starting points of the two nozzles (5-6) and the lower end surface of the shield (5-3).

3. The spray gun nozzle for film capacitor according to claim 2, characterized in that: The distance L1 between the two nozzles (5-6) is 2-3.5 mm.

4. The spray gun nozzle for film capacitor according to claim 2, characterized in that: The distance L2 between the extended arc starting points of the two nozzles (5-6) and the lower end surface of the shield (5-3) is 0-2 mm.

5. The spray gun nozzle for film capacitor according to claim 1, characterized in that: An O-shaped sealing ring (5-10) is also embedded on the top of the housing (5-1).

6. The spray gun nozzle for film capacitor according to claim 1, characterized in that: The air head (5-5) is a boss-shaped structure, and the diameter of the central air passage of the air head (5-5) is not less than the distance L1 between the nozzles of the two nozzles (5-6).

7. The spray gun nozzle for film capacitor according to claim 1, characterized in that: The blowing head (5-2) is a ceramic blowing head.

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