A stamping jig for battery cap explosion-proof aluminum sheet

Abstract

This utility model discloses a stamping fixture for explosion-proof aluminum sheets in battery caps, relating to the field of battery processing technology. The utility model includes a die, an air jet pipe, and a spray gun. The die has a spherical air cavity inside, with six inclined air holes at the upper end of the cavity. The lower inclined ends of the six air holes are connected to the cavity, and the upper inclined ends of the six air holes penetrate the central convex arc surface of the die and point towards the groove. One end of the air jet pipe is inserted into the die and communicates with the air cavity. The nozzle of the spray gun is aligned with the die. This utility model, by setting up the air jet pipe, spherical air cavity, air holes, and spray gun, solves the problem that existing stamping fixtures for explosion-proof aluminum sheets in battery caps cannot automatically clean aluminum sheet debris residue, and also solves the problem of needing manual cleaning of aluminum sheet oxide adhesion to the mold surface.

Description

Technical Field

[0001] This utility model belongs to the field of battery processing technology, and in particular relates to a stamping fixture for explosion-proof aluminum sheets for battery caps. Background Technology

[0002] With the development of new energy technologies, batteries, as a type of power storage unit, are widely used in various industries. The battery usage environment is also becoming increasingly complex. During battery use, due to various reasons (such as overcharging, short circuits, and abnormal temperatures), the electrolyte inside the battery decomposes, producing a large amount of gas, which causes the internal pressure of the battery to rise sharply, posing a potential explosion hazard. In order to reduce the possibility of battery explosion, explosion-proof aluminum sheets for battery caps have emerged. When the internal pressure of the battery exceeds the safety threshold, the explosion-proof aluminum sheet for battery caps ruptures through a preset burst point or pressure relief hole, quickly releasing the high-pressure gas and substances inside, thus preventing the entire battery casing from exploding.

[0003] Currently, the general method for manufacturing explosion-proof aluminum sheets for battery caps involves using a stamping fixture to process the aluminum sheet. This fixture uses a press to drive the upper and lower dies to close, applying pressure to plastically deform the aluminum sheet and form the desired battery cap. However, traditional stamping fixtures for explosion-proof aluminum sheets for battery caps still have the following problems during use:

[0004] During the process of applying pressure to the aluminum sheet to cause plastic deformation, due to the limitations of current technology, it is inevitable that aluminum sheet debris will accumulate. This accumulated aluminum sheet debris will greatly affect the precision of the stamping fixture for the explosion-proof aluminum sheet of the battery cap, resulting in problems such as wrinkles and deformation of the produced battery cap, low yield, increased cost, and wasted time.

[0005] During the stamping process of aluminum sheets, the oxide layer on the surface of the aluminum sheet rubs against the mold surface during the drawing process. The oxide layer is easy to peel off and stick to the mold surface, causing damage to the mold. This requires manual cleaning of the aluminum sheet oxide adhering to the mold surface, which not only reduces work efficiency and increases labor costs, but also hinders the further processing of the aluminum sheet.

[0006] To address these issues, we provide a stamping fixture for explosion-proof aluminum sheets used in battery caps. Utility Model Content

[0007] The purpose of this utility model is to provide a stamping fixture for explosion-proof aluminum sheets for battery caps. By using a jet pipe, air chamber, air hole, air valve spray gun, dry ice chamber and pulse valve, it solves the problem that existing stamping fixtures for explosion-proof aluminum sheets for battery caps cannot automatically clean aluminum sheet debris residue, and also solves the problem that manual cleaning of aluminum sheet oxide adhesion to the mold surface is required.

[0008] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0009] This utility model is a stamping fixture for explosion-proof aluminum sheet for battery caps, including a body, an air jet pipe and a spray gun. The body includes a die and a base. The top of the base is fixedly connected to the die. The die has a groove in the center and a protrusion in the center of the groove.

[0010] A spherical air cavity is provided at the center of the cavity. Six inclined air holes are arranged in a ring at the upper end of the spherical air cavity. The lower ends of the six air holes are connected to the air cavity. The upper ends of the six air holes penetrate the arc surface of the center of the cavity and point to the groove. An air jet pipe is fixedly connected to one side of the cavity, and one end of the air jet pipe inserted into the cavity communicates with the air cavity.

[0011] The design of the air chamber and air hole allows the ejected gas to carry the aluminum scrap residue initially located in the groove out of the groove, thus achieving the function of cleaning the aluminum scrap residue.

[0012] A spray gun is provided on the side of the machine body away from the jet pipe. A dry ice chamber is fixedly connected to the upper end of the outer periphery of the spray gun. The nozzle of the spray gun is aligned with the concave mold.

[0013] The dry ice chamber contains dry ice pellets. Due to gravity, the dry ice pellets initially fall into the spray gun. When the airflow passes through the spray gun, it also moves the dry ice pellets inside the spray gun. Since the spray gun nozzle is aimed at the die, the dry ice pellets move quickly toward the die surface. During the movement, the dry ice pellets sublimate rapidly, and through the low temperature effect, the aluminum oxide adhered to the die surface quickly becomes brittle and peels off, thereby effectively removing the aluminum oxide adhering to the die surface. At the same time, the dry ice pellets turn into gas after sublimation, without causing new residues.

[0014] Furthermore, an air valve is fixedly connected to the end of the jet pipe away from the air chamber. The air valve is connected to an air compressor. When the stamping fixture stops working, the air compressor is started and the air valve is opened. The airflow ejected by the air compressor can reach the air chamber through the jet pipe, and then blow into the groove through the six air holes, causing the aluminum scraps remaining in the groove to move, and finally blowing the aluminum scraps out of the groove.

[0015] Furthermore, both ends of the base of the die are fixedly connected with bosses; the fixed structure of the two bosses and the base ensures that the die remains stable and does not move during the stamping process, thus ensuring the normal operation of the stamping of the explosion-proof aluminum sheet for the battery cap.

[0016] Furthermore, each of the two protrusions is fixedly connected to a support column at its upper end, and the upper ends of the two support columns are jointly fixedly connected to a top plate. A hydraulic cylinder is fixedly connected to the center of the upper end of the top plate. The base, protrusions, support rods, and top plate constitute the main frame of the stamping fixture for the entire explosion-proof aluminum sheet of the battery cap. The fixed connection structure between the base and the protrusion, the protrusion and the support rod, and the support rod and the top plate ensures that the entire stamping fixture is in a stable structure, enabling the stamping of the explosion-proof aluminum sheet of the battery cap to proceed normally and stably, while the hydraulic cylinder provides power for the stamping operation.

[0017] Furthermore, the top plate has four holes running through it from top to bottom, and each of the four holes has a limit rod fitted into it. The lower ends of the four limit rods are fixedly connected to a punch.

[0018] During the stamping process, the four limiting rods move up and down together with the punch. Since the limiting rods are set to fit the hole, they can only move up and down vertically within the hole. At the same time, the punch, which is connected to the lower ends of the four limiting rods, can also only move up and down vertically, thus improving the accuracy of the stamping fixture for the explosion-proof aluminum sheet of the battery cap.

[0019] Furthermore, a protrusion is provided at the center of the lower surface of the punch, and the size of the protrusion is consistent with the size of the groove at the center of the die. During the stamping process of the explosion-proof aluminum sheet, the explosion-proof aluminum sheet is placed on the upper end of the die, the die is fixed, and the punch moves from top to bottom. When the punch and the die tend to fit together, the protrusion provided at the center of the lower surface of the punch and the groove at the center of the die also tend to fit together. The protrusion and the groove squeeze the aluminum sheet, and the aluminum sheet deforms accordingly, eventually becoming the shape of a standard battery cap.

[0020] Furthermore, the piston rod at the telescopic end of the hydraulic cylinder passes downward through the top plate and is fixedly connected to the punch; when the hydraulic cylinder is activated, the piston rod of the hydraulic cylinder drives the punch to move, applying pressure to the explosion-proof aluminum sheet, thereby completing the stamping work.

[0021] Furthermore, a fixed platform is fixedly connected to the side of the base away from the jet pipe, and a support rod is fixedly connected to the upper end of the fixed platform. The upper end of the support rod is fixedly connected to the lower part of the spray gun. The fixed platform and the support rod provide a support structure for the spray gun, enabling the spray gun to spray dry ice pellets normally and stably.

[0022] Furthermore, a cover is threaded onto the upper end of the dry ice chamber, and a pulse valve is provided at the end of the spray gun away from the machine body. When the number of dry ice pellets in the dry ice chamber is low or exhausted, the cover is opened, new dry ice pellets are added to the dry ice chamber, and then the cover is screwed back onto the upper end of the dry ice chamber to complete the filling of dry ice pellets.

[0023] When the pulse valve is connected to an external air compressor, and it is necessary to clean the aluminum oxide adhering to the surface of the die, start the air compressor, open the pulse valve, and the airflow sprayed by the air compressor can pass through the spray gun, and at the same time drive the dry ice pellets that are initially inside the spray gun to move to the surface of the die, thereby removing the aluminum oxide adhering to the surface of the die.

[0024] This utility model has the following beneficial effects:

[0025] This invention solves the problem of reduced precision in the stamping fixture of the explosion-proof aluminum sheet for battery caps caused by residual aluminum scrap. By setting up an air jet pipe, air chamber, air hole, and air valve, the invention addresses this issue. After the stamping of the explosion-proof aluminum sheet is completed, the air valve is opened, and the air compressor connected to the air valve is started. The airflow blown out by the air compressor enters the air chamber through the air jet pipe and then exits through the air hole. The airflow moves the residual aluminum scrap on the stamping fixture, thereby cleaning the aluminum scrap and ensuring that the precision of the stamping fixture for the explosion-proof aluminum sheet of the battery cap is not reduced, maintaining the yield rate, reducing costs, and saving time.

[0026] This invention solves the problem of aluminum oxide adhering to the mold surface and causing mold damage during the stamping process of explosion-proof aluminum sheets by setting up a spray gun, dry ice chamber, and pulse valve. Due to gravity, the dry ice pellets initially in the dry ice chamber fall into the inner cavity of the spray gun. After the stamping of the explosion-proof aluminum sheet is completed, the air compressor connected to the pulse valve is started and the pulse valve is opened. The airflow from the air compressor drives the dry ice pellets in the spray gun towards the mold. During the movement, the dry ice pellets sublimate and absorb heat, creating a low temperature on the mold surface. The aluminum oxide embrittles and falls off under the low temperature environment. Moreover, the dry ice pellets sublimate into gas without residue, realizing the treatment of aluminum oxide, increasing work efficiency, reducing labor costs, saving time, and facilitating the next process.

[0027] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of a stamping fixture for an explosion-proof aluminum sheet used in battery caps.

[0030] Figure 2 This is a bottom view schematic diagram of a stamping fixture for an explosion-proof aluminum sheet used in battery caps.

[0031] Figure 3 This is a cross-sectional schematic diagram of the die and the jet pipe.

[0032] Figure 4 This is a diagram showing the connection structure between the spray gun and the chamber cover, dry ice chamber, pulse valve, support rod, and fixed platform.

[0033] Figure 5 This is a cross-sectional schematic diagram of the spray gun, the cover, and the dry ice chamber.

[0034] Figure 6 for Figure 3 Enlarged view of the structure at point A in the middle.

[0035] The attached diagram lists the components represented by each number as follows:

[0036] 1. Body; 101. Hydraulic cylinder; 102. Top plate; 103. Limiting rod; 104. Support column; 105. Punch; 106. Die; 107. Base; 1071. Boss; 2. Jet pipe; 201. Air chamber; 202. Air hole; 203. Air valve; 3. Spray gun; 301. Compartment cover; 302. Dry ice compartment; 303. Pulse valve; 304. Support rod; 305. Fixing platform. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. Specific Implementation Example 1

[0038] Please see Figure 1-6 This utility model is a stamping fixture for explosion-proof aluminum sheet for battery caps, including a body 1, an air jet pipe 2 and a spray gun 3; the body 1 includes a die 106 and a base 107, the top of the base 107 is fixedly connected to the die 106, the die 106 has a groove in the center, and the center of the groove has a protrusion.

[0039] Among them, such as Figure 1 , Figure 2 As shown, bosses 1071 are fixedly connected to the upper ends of the bases 107 at both ends of the die 106. The fixed structure of the two bosses 1071 and the bases 107 ensures that the die 106 remains stable and does not move during the stamping process, thereby improving the yield of the explosion-proof aluminum sheet for the battery cap.

[0040] A protrusion is provided at the center of the lower surface of the punch 105, and the size of the protrusion is the same as the size of the groove at the center of the die 106. During the stamping process of the explosion-proof aluminum sheet, the explosion-proof aluminum sheet is placed on the upper end of the die 106, the die 106 is fixed, and the punch 105 moves from top to bottom. When the punch 105 and the die 106 tend to fit together, the protrusion provided at the center of the lower surface of the punch 105 and the groove at the center of the die 106 also tend to fit together. The explosion-proof aluminum sheet between the two will also deform accordingly and eventually become the shape of a standard battery cap.

[0041] The upper end of the boss 1071 is fixedly connected to the support column 104. The upper ends of the two support columns 104 are fixedly connected to the top plate 102. The base 107, the boss 1071, the support rod 304 and the top plate 102 form the main frame of the stamping fixture for the entire explosion-proof aluminum sheet of the battery cap. The fixed connection structure between the base 107 and the boss 1071, the boss 1071 and the support rod 304, and the support rod 304 and the top plate 102 makes the entire stamping fixture a stable structure, so that the stamping work of the explosion-proof aluminum sheet of the battery cap can be carried out normally and stably.

[0042] The top plate 102 has four holes running from top to bottom. Each of the four holes is fitted with a limit rod 103. The lower ends of the four limit rods 103 are fixedly connected to a punch 105. During the stamping process, the four limit rods 103 and the punch 105 move up and down together. Because the limit rods 103 are fitted into the holes, they can only move vertically up and down within the holes. At the same time, the punch 105, which is connected to the lower ends of the four limit rods 103, can only move vertically up and down, thus improving the accuracy of the stamping fixture for the explosion-proof aluminum sheet of the battery cap.

[0043] A hydraulic cylinder 101 is fixedly connected to the center of the upper end of the top plate 102. The piston rod of the telescopic end of the hydraulic cylinder 101 passes through the top plate 102 and is fixedly connected to the punch 105. The hydraulic cylinder 101 provides power for the stamping operation. When the hydraulic cylinder 101 is started, the piston rod of the hydraulic cylinder 101 drives the punch 105 to move, apply pressure to the aluminum sheet, and thus complete the stamping operation.

[0044] Among them, such as Figure 3 As shown, a spherical air cavity 201 is provided at the center of the cavity 106. Six inclined air holes 202 are arranged in a ring array at the upper end of the spherical air cavity 201. The lower inclined ends of the six air holes 202 are all connected to the air cavity 201, and the upper inclined ends of the six air holes 202 penetrate the arc surface of the center of the cavity 106 and point towards the groove. An air jet pipe 2 is fixedly connected to one side of the cavity 106, and one end of the air jet pipe 2 inserted into the cavity 106 communicates with the air cavity 201. The arrangement of the air cavity 201 and the air holes 202 allows the ejected gas to carry the aluminum scrap residue initially located in the groove out of the groove, thereby achieving the function of cleaning the aluminum scrap residue.

[0045] An air valve 203 is fixedly connected to the end of the jet pipe 2 away from the air chamber 201. The air valve 203 is connected to an external air compressor. When the stamping fixture stops working, the air compressor is started and the air valve 203 is opened. The airflow ejected by the air compressor can reach the air chamber 201 through the jet pipe 2, and then blow into the groove through the six air holes 202, causing the aluminum scraps remaining in the groove to move, thereby achieving the function of cleaning the aluminum scraps.

[0046] The working principle of this embodiment is as follows: The aluminum sheet to be stamped is placed at the center of the top of the die 106. The hydraulic cylinder 101 is activated, and the piston rod of the hydraulic cylinder 101 drives the punch 105 to move. Due to the presence of the limiting rod 103, the punch 105 can only move in the vertical direction. When the punch 105 and the die 106 tend to fit together, the protrusion at the center of the lower surface of the punch 105 and the groove at the center of the die 106 also tend to fit together. The piston rod of the hydraulic cylinder 101 continues to apply pressure, and the aluminum sheet between the protrusion at the center of the lower surface of the punch 105 and the groove at the center of the die 106 will also deform accordingly. The aluminum sheet is then formed into the standard shape of a battery cap. When aluminum scrap remains inside the groove, the air compressor connected to the air valve 203 is started and the air valve 203 is opened. The airflow from the air compressor can reach the air chamber 201 through the jet pipe 2, and then blow into the groove through the six air holes 202, moving the aluminum scrap remaining in the groove to the outside of the groove, thus cleaning the aluminum scrap. After the aluminum scrap is cleaned, the air valve 203 and the air compressor connected to the air valve 203 are turned off. Then, a new aluminum sheet to be processed is placed at the center of the top of the die 106, and the hydraulic cylinder 101 is started to restart the stamping of the explosion-proof aluminum sheet for the battery cap. Specific Implementation Example 2

[0047] Please see Figure 1-5 Based on the first specific embodiment, a spray gun 3 is provided on the side of the machine body 1 away from the jet pipe 2. A dry ice chamber 302 is fixedly connected to the upper end of the outer periphery of the spray gun 3. The nozzle of the spray gun 3 is aligned with the concave mold 106.

[0048] Dry ice pellets are stored in the dry ice chamber 302. Due to gravity, the dry ice pellets initially located in the dry ice chamber 302 will fall into the spray gun 3. When the airflow passes through the spray gun 3, it will also drive the dry ice pellets in the spray gun 3 to move. Since the nozzle of the spray gun 3 is aimed at the concave mold 106, the dry ice pellets will also move quickly toward the surface of the concave mold 106. During the movement, the dry ice pellets sublimate rapidly. Through the low temperature effect, the aluminum oxide adhering to the surface of the concave mold 106 is quickly embrittled and peeled off, thereby effectively removing the aluminum oxide adhering to the surface of the concave mold 106. At the same time, the dry ice pellets become gas after sublimation, and will not cause new residues.

[0049] Among them, such as Figure 1-5 As shown, a fixed platform 305 is fixedly connected to the side of the base 107 away from the jet pipe 2. A support rod 304 is fixedly connected to the upper end of the fixed platform 305. The upper end of the support rod 304 is fixedly connected to the lower part of the spray gun 3. The fixed platform 305 and the support rod 304 provide a support structure for the spray gun 3, so that the spray gun 3 can complete the work of spraying dry ice pellets normally and stably.

[0050] Among them, such as Figure 1-5 As shown, a cover 301 is threaded onto the upper end of the dry ice chamber 302, and a pulse valve 303 is installed at the end of the spray gun 3 away from the body 1. When the number of dry ice pellets in the dry ice chamber 302 is low or exhausted, the cover 301 is opened, new dry ice pellets are added to the dry ice chamber 302, and then the cover 301 is screwed back onto the upper end of the dry ice chamber 302 to complete the filling of dry ice pellets. The pulse valve 303 is connected to an external air compressor. When it is necessary to clean the aluminum oxide adhering to the surface of the die 106, the air compressor is started and the pulse valve 303 is opened. The airflow sprayed by the air compressor can pass through the spray gun 3, and at the same time, it drives the dry ice pellets that are initially inside the spray gun 3 to move to the surface of the die 106, thereby removing the aluminum oxide adhering to the surface of the die 106.

[0051] The working principle of this embodiment is as follows: When aluminum oxide adheres to the surface of the groove, the hydraulic cylinder 101 is closed, the formed battery cap is removed, and then the air compressor connected to the pulse valve 303 is started. The airflow from the air compressor can then pass through the spray gun 3. Due to gravity, the dry ice pellets initially located in the dry ice chamber 302 will fall into the spray gun 3. At this time, the airflow drives the dry ice pellets falling into the spray gun 3 to move towards the surface of the mold 106. During the movement, the dry ice pellets sublimate rapidly, and through the low temperature effect, the aluminum oxide adhered to the surface of the mold 106 is rapidly embrittled and peeled off. At the same time, the dry ice pellets turn into gas after sublimation. This process will not cause new residues. After the aluminum oxide is peeled off, start the air compressor connected to the air valve 203 and open the air valve 203. The airflow from the air compressor can then blow through the jet pipe 2, the air chamber 201 and the six air holes 202 into the groove, causing the aluminum oxide in the groove to move out of the groove, thus cleaning the aluminum oxide. After the aluminum oxide is cleaned, close the air valve 203, the air compressor connected to the air valve 203, the pulse valve 303 and the air compressor connected to the pulse valve 303. Then, place a new aluminum sheet to be processed at the center of the top of the die 106 and start the hydraulic cylinder 101 to restart the stamping of the explosion-proof aluminum sheet for the battery cap.

[0052] The above are merely preferred embodiments of the present utility model and do not limit the present utility model. Any modifications, equivalent substitutions, or improvements made to the technical solutions described in the foregoing embodiments, or to some of the technical features, shall fall within the protection scope of the present utility model.

Claims

1. A stamping fixture for explosion-proof aluminum sheets for battery caps, comprising a body (1), an air jet pipe (2), and a spray gun (3); characterized in that: The body (1) includes a concave mold (106) and a base (107). The top of the base (107) is fixedly connected to the concave mold (106). The concave mold (106) has a groove in the center and a protrusion in the center of the groove. A spherical air cavity (201) is provided at the center of the cavity (106). Six inclined air holes (202) are arranged in a ring array at the upper end of the spherical air cavity (201). The lower inclined ends of the six air holes (202) are all connected to the air cavity (201). The upper inclined ends of the six air holes (202) penetrate the arc surface of the center of the cavity (106) and point to the groove. A jet pipe (2) is fixedly connected to one side of the cavity (106), and one end of the jet pipe (2) inserted into the cavity (106) communicates with the air cavity (201). A spray gun (3) is provided on the side of the body (1) away from the jet pipe (2). A dry ice chamber (302) is fixedly connected to the upper end of the outer periphery of the spray gun (3). The nozzle of the spray gun (3) is aligned with the concave mold (106).

2. The stamping fixture for explosion-proof aluminum sheets for battery caps according to claim 1, characterized in that: An air valve (203) is fixedly connected to the end of the jet pipe (2) away from the air chamber (201).

3. A stamping fixture for an explosion-proof aluminum sheet for a battery cap according to claim 1, characterized in that: Both ends of the die (106) have bosses (1071) fixedly connected to the upper ends of the base (107).

4. A stamping fixture for an explosion-proof aluminum sheet for a battery cap according to claim 3, characterized in that: The upper ends of the two protrusions (1071) are fixedly connected to support columns (104), and the upper ends of the two support columns (104) are fixedly connected to a top plate (102). A hydraulic cylinder (101) is fixedly connected to the center of the upper end of the top plate (102).

5. A stamping fixture for an explosion-proof aluminum sheet for a battery cap according to claim 4, characterized in that: The top plate (102) has four holes running through it from top to bottom. Each of the four holes is fitted with a limit rod (103), and the lower ends of the four limit rods (103) are fixedly connected to a punch (105).

6. A stamping fixture for an explosion-proof aluminum sheet for a battery cap according to claim 5, characterized in that: A protrusion is provided at the center of the lower surface of the punch (105), and the size of the protrusion is consistent with the size of the groove at the center of the die (106).

7. A stamping fixture for an explosion-proof aluminum sheet for a battery cap according to claim 6, characterized in that: The piston rod at the telescopic end of the hydraulic cylinder (101) extends downward through the top plate (102) and is fixedly connected to the punch (105).

8. A stamping fixture for an explosion-proof aluminum sheet for a battery cap according to claim 1, characterized in that: A fixed platform (305) is fixedly connected to the side of the base (107) away from the jet pipe (2). A support rod (304) is fixedly connected to the upper end of the fixed platform (305). The upper end of the support rod (304) is fixedly connected to the lower part of the spray gun (3).

9. A stamping fixture for an explosion-proof aluminum sheet for a battery cap according to claim 1, characterized in that: The dry ice chamber (302) is threaded with a chamber cover (301) at the upper end, and a pulse valve (303) is provided at the end of the spray gun (3) away from the machine body (1).

Images