Electrode breaker

Abstract

The electrode cutter has two cutter tracks which are perpendicular to the central axis of the cylindrical electrode outside the outlet of the cylindrical electrode, two opposite opening and closing cutting tools which can move back and forth along the cutter tracks are movably connected in the cutter tracks, pneumatic devices are fixedly connected on the back of each cutting tool, and the pneumatic devices can drive each cutting tool to move along the cutter track; a hot runner is arranged inside the cutting tool near the inner wall, and a cold runner is arranged near the outer wall. The temperature of the inner and outer sides of the cutting tool and the temperature of the blade part can be designed and controlled respectively, the electrode is not adhered to the inside of the cutting tool, and can be quickly cooled and shaped.

Description

TECHNICAL FIELD

[0001] The present application relates to a material cutting machine. BACKGROUND

[0002] The application with application number 201910916028.2 relates to a titanium alloy bar cutting device, which comprises a base plate, a buckle mechanism, an extrusion mechanism, a pushing mechanism, a cutting base and a supporting base. The buckle mechanism is vertically and uniformly installed on the top left side of the base plate. The pushing mechanism is located on the right side of the buckle mechanism. There is one supporting mechanism between every two adjacent buckle mechanisms. The right end of the supporting mechanism is installed on the middle part of the left end of the pushing mechanism. There is a square groove on the top of the base plate corresponding to the positions of the two ends of the pushing mechanism. The cutting base is located on the rear side of the buckle mechanism. The cutting base is installed on the top end of the base plate. The supporting base is arranged behind the cutting base and is installed on the top rear side of the base plate. The application is a metal cutting machine, which is not suitable for cutting thermoplastic or viscous materials.

[0003] The application with application number 2012105084254 discloses an automatic limiting shearing device for graphite electrode profile products, which comprises a touch switch, a cutter, a cutter operation control system, an extrusion molding machine operation control system, a supporting rod, a transmission line and a supporting rod track. The touch switch is installed on the top of the supporting rod. When the electrode profile product pushes forward on the transmission line and hits the touch switch, the sensor of the touch switch sends a control signal to the cutter operation control system and the extrusion molding machine operation control system. The cutter operation control system is symmetrically arranged on both sides of the outlet of the extrusion molding machine, and the cutter is vertically arranged in the center of the cutter operation control system. The cutter of the application cuts from one side, and the stress on one side of the electrode material may cause the electrode to bend and deform. Moreover, the temperature of the cutter is not effectively controlled. SUMMARY

[0004] OBJECTIVE

[0005] To provide a two-way cutting electrode material cutter with symmetrical stress, which can reduce the cutting force and is beneficial to rapid shaping.

[0006] The electrode material cutter of the application is installed at the cylindrical electrode outlet of the carbon electrode extruder. There are cutter tracks perpendicular to the central axis of the cylindrical electrode on both sides of the outside of the cylindrical electrode outlet. There are two opposite opening and closing material cutting cutters movably connected in the cutter tracks and capable of reciprocating along the cutter tracks. The material cutting cutters also serve as door seals, so that the electrode end part extruded by the extruder is tightly pressed. A pneumatic device (the extension rod of the pneumatic device is connected to the back of the cutter, and the cylinder of the pneumatic device is fixed to the far end of the cutter track) or an electric device is fixedly connected to the back of each material cutting cutter, which can drive each cutter to move along the cutter track.

[0007] The electrode blank extruded by the extruder is extruded to a certain length and is cut by two shearing tools that move relative to each other before it cools down to hardened material.

[0008] The cutting tool is internally equipped with hot and cold runners. The hot runner is a hot water, oil, or electric heating pipe that heats the electrode material to increase its temperature and plasticity (the asphalt softens upon heating), making it easier to cut. The cold runner is a cold water or oil runner that cools the electrode material, allowing it to harden and set quickly after cutting.

[0009] The hot runner is preferably set in the wall near the inner side of the cutting tool to facilitate heating the electrode material inside the outlet (the inner wall of the cutting tool is in contact with the electrode head end) and raising the temperature to a certain level (higher than the softening point and lower than the melting point, so that the cutting tool can easily cut the electrode material to form a cylindrical electrode).

[0010] The cold runner is set in the wall near the outside of the cutting tool to facilitate cooling the cut electrode material outside the outlet (the outer wall of the cutting tool is in contact with the tail end of the electrode) and reduce the temperature to a certain level (below the softening point, so that the tail end is hardened and shaped, making the shape of the cylindrical electrode better retained).

[0011] It is further preferred that the hot runner is extended to near the cutting edge of the tool, and the hot runner inside the cutting edge is serrated, so that different temperature gradients are formed in the cutting edge (the average temperature is lower than the temperature of the inner wall and higher than the temperature of the outer wall; a serrated temperature curve is formed). The high temperature point at the serrated tooth tip (the temperature is slightly higher than the softening point) and the low temperature point between the tooth root (cannot be directly heated, but only heat is transferred, and the temperature of the tooth root is lower than the temperature at the tooth tip) alternate, so that the high temperature point quickly melts the asphalt in the electrode material, reducing the cutting resistance; the low temperature point causes the asphalt to cool down and condense, so that the electrode coming out of the mold quickly maintains the flat shape of the cylindrical end face, and the asphalt is not easy to stick to the tool.

[0012] The temperature of each potential in each part of the hot runner can be controlled by the temperature controller to adjust the temperature to adapt to electrode materials of different formulations (especially electrode materials with different softening points).

[0013] The high-speed tool creates a serrated cutting effect, facilitating quick severing without sticking. The tool's blade is actually not serrated, but rather straight, ensuring a smooth, straight cut without sawdust or sticking. The serrated shape is simply the temperature curve created by the hot runner.

[0014] Beneficial effects:

[0015] The cutting tool of the present invention shears the electric material vertically, with a short cutting path and a fast cutting speed; the two cutters move toward each other, the cut end plane has good straightness, and the cylindrical electrode is subjected to uniform radial force and is not easy to bend.

[0016] The temperature of the inner and outer sides of the tool and the temperature of the blade can be designed and controlled separately. The high temperature of the electrode head surface can soften the electrode material, prevent it from sticking to the inside of the tool, and facilitate cutting. The low temperature of the electrode tail surface allows the electrode to cool and set quickly after cutting.

[0017] The blade forms a temperature gradient and has a sawtooth shearing effect, similar to sawing a cylindrical electrode, which makes cutting more labor-saving and more efficient. The blade of the tool is not easy to get scratched and has a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional structure of the present invention.

[0019] Figure 2 yes Figure 1 Rear view of the cutting tool.

[0020] Figure 3 yes Figure 1 A schematic diagram of a hot runner inside a cutting tool.

[0021] In the figure, 1-cylindrical electrode; 2-tool blade; 3-part of the electrode blocked by the tool; 4-cutting tool; pneumatic-hydraulic drive device (5-piston rod; 6-cylinder); 7-hot runner inlet; 8-cold runner inlet; 9-cold runner outlet; 10-hot runner outlet; 12-hot runner zigzag branch; 20-hot runner straight pipe branch. DETAILED DESCRIPTION

[0022] Example 1:

[0023] like Figure 1 The electrode breaker shown is installed at the outlet of the cylindrical electrode 1 of the carbon electrode extruder. There are tool tracks perpendicular to the central axis of the cylindrical electrode 1 on both sides of the outer side of the cylindrical electrode 1 outlet. Two cutting tools 4 that can move back and forth along the tool track and open and close towards each other are movably connected in the tool track.

[0024] A hot runner with hot water as a heat source and a cold runner with cold water as a cold source are arranged inside the cutting tool 4 with a hollow inner shell; the hot runner is arranged in the wall near the inner side of the cutting tool 4, and the cold runner is arranged in the wall near the outer side of the cutting tool 4.

[0025] The hot runner extends close to the tool blade 2. The hot runner inside the blade is in a sawtooth shape, so that different temperature gradients are formed at the blade, forming a sawtooth temperature curve.

[0026] The electrode blank extruded by the extruder is extruded to a certain length and is cut by two shearing tools that move relative to each other before it cools down to hardened material.

[0027] Example 2:

[0028] like Figure 2 The hot runner inlet and outlet and the cold runner inlet and outlet on the back of the cutting tool 4 are shown.

[0029] like Figure 3 The hot runner heat source inlet and outlet are shown. Hot water enters the heat source inlet, flows through the hot runner branch, and then exits the hot runner outlet 10. A straight hot runner branch is installed near the inner wall (inner side) of the tool, and a zigzag hot runner branch is installed on the tool edge 2. This heats the inner wall (inner side) of the tool and transfers heat to the end face of the cylindrical electrode 1 inside the extruder for auxiliary heating.

Claims

1. An electrode cutter, installed at the outlet of a cylindrical electrode (1) of a carbon electrode extruder, having tool tracks perpendicular to the central axis of the cylindrical electrode (1) on both sides of the outer side of the cylindrical electrode (1), and two cutting knives (4) that can move back and forth along the tool tracks and open and close in opposite directions are movably connected in the tool tracks; the cylindrical electrode (1) preform extruded by the extruder is extruded to a certain length, and before it is cooled to harden the material, it is cut by the two cutting knives (4) that move relative to each other and close; A hot runner is provided inside the cutting tool (4) to facilitate heating to increase the temperature of the electrode material. The hot runner is provided in the wall surface near the inner side of the cutting tool (4), and the wall surface near the inner side contacts the head end of the cylindrical electrode (1); the characteristics are: The hot runner extends to the edge of the tool (2), and the hot runner inside the blade is in a sawtooth shape, so that different temperature gradients are formed at the blade, forming a sawtooth temperature curve; the high temperature point of the sawtooth tooth tip is slightly higher than the softening point; the low temperature point of the tooth root is lower than the temperature at the tooth tip, so that the asphalt cools down and condenses; A cold runner is provided inside the cutting tool (4), and the cold runner is provided in a wall surface close to the outside of the cutting tool (4), and the wall surface close to the outside is in contact with the tail end of the cylindrical electrode (1).

2. The electrode breaker according to claim 1, characterized in that: The hot runner is a hot oil flow channel, and the temperature increased by heating is higher than the softening point of the electrode material and lower than the melting temperature; the cold runner is a cold water flow channel or a cold oil flow channel, and the temperature reduced is lower than the softening point of the electrode material.

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