Wire solid-liquid continuous casting mold and composite furnace

Abstract

The present invention relates to the technical field of composite wire forming equipment, and discloses a mold and a composite furnace for wire solid-liquid continuous casting, including a mold body, a solidification forming sizing hole with an inner diameter larger than the core material diameter is opened in the mold body, and a continuous casting gap is arranged between the inner wall of the solidification forming sizing hole and the outer wall of the core material; the outer wall of the mold body is opened with a liquid inlet portion connected to the solidification forming sizing hole, and one end of the mold body is opened with a wire inlet hole coaxially arranged with the solidification forming sizing hole and having a diameter larger than the diameter of the solidification forming sizing hole, and a plugging piece for plugging the liquid inlet portion is slidably connected in the wire inlet hole, and a through hole coaxially arranged with the solidification forming sizing hole is arranged in the plugging piece. The present application can solve the problem in the prior art that when different composite wires are formed and different core materials are replaced, a lot of time will be consumed, which affects the efficiency of composite wire forming.

Description

Technical Field

[0001] The invention relates to the field of composite wire forming equipment, and in particular to a mold and a composite furnace for solid-liquid continuous casting of wires. Background Art

[0002] As a commonly used wire, the basic structure of composite wire generally includes an internal copper conductor and an outer sheath coated and compounded on the outside of the internal copper conductor. The outer sheath is commonly made of brass, lead or conductive plastic. Since lead is a toxic heavy metal, it has been ordered to continue to be used. At present, the manufacturing process of composite wire mainly includes coating welding process, seamless tube sleeve drawing process and solid-liquid composite continuous casting process. Among them, the solid-liquid composite continuous casting process can realize continuous automatic production, and the composite interface of the composite wire is a metallurgical bond, which has the characteristics of high strength, no cracking and excellent conductivity, and is increasingly valued and favored by enterprises. In the prior art, when the solid-liquid composite continuous casting process is used to form composite wire, a composite furnace and a melting furnace that are interconnected are usually set up. The melting furnace is used to heat the coating layer metal to obtain the coating layer metal liquid. The coating layer metal liquid flows into the composite furnace, and then the core material is continuously passed through the composite furnace. The coating layer metal liquid in the composite furnace automatically and continuously coats and compounds on the outside of the core material to form a composite wire. In order to control the contact between the core material and the molten metal of the coating layer, a continuous casting mold is usually used in the prior art to control the contact area between the core material and the molten metal of the coating layer, so as to achieve stable and continuous continuous casting.

[0003] Although the above-mentioned forming method can complete the continuous casting of the composite wire, in the actual production process, different types of composite wires will be produced according to production needs. When producing different types of composite wires, the core material used will be adjusted and changed accordingly. If the existing continuous casting mold is used, when the original core material is removed and replaced with a new core material, all the coating layer metal liquid in the composite furnace needs to be drained away before the core material can be replaced. Otherwise, the coating layer metal liquid will flow out of the composite furnace through the core material transmission channel, which not only causes waste of the coating layer metal liquid, but also easily causes safety hazards to the surrounding environment due to the high-temperature coating layer metal liquid. Therefore, in the solid-liquid continuous casting process in the prior art, when replacing the core material, it takes a lot of time to discharge the coating layer metal liquid in the composite furnace, which not only affects the forming efficiency of the composite wire, but also requires a lot of energy to maintain the temperature of the melting furnace and the composite furnace, resulting in serious energy waste. Summary of the invention

[0004] The present invention aims to provide a mold for solid-liquid continuous casting of wires to solve the problem in the prior art that when different core materials are replaced when molding different composite wires, a lot of time is consumed, which affects the efficiency of composite wire molding.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a mold for solid-liquid continuous casting of wire, including a mold body, a solidification forming sizing hole with an inner diameter larger than the core material diameter is opened in the mold body, and a continuous casting gap is arranged between the inner wall of the solidification forming sizing hole and the outer wall of the core material; a liquid inlet part connected to the solidification forming sizing hole is opened on the outer wall of the mold body, and a wire inlet hole coaxially arranged with the solidification forming sizing hole and with a diameter larger than the diameter of the solidification forming sizing hole is opened at one end of the mold body, a sealing member for sealing the liquid inlet part is slidably connected in the wire inlet hole, and a through hole coaxially arranged with the solidification forming sizing hole is arranged in the sealing member.

[0006] The principle of this scheme is: when the composite wire is normally formed, the sealing piece will not have a sealing effect on the liquid inlet. At this time, the coating layer metal liquid in the composite furnace in the prior art passes through the liquid inlet and enters the continuous casting gap, so that the coating layer metal liquid automatically covers and compounds with the outer wall of the core material to produce the composite wire; when it is necessary to form other types of composite wires and replace the core material, it is only necessary to slide the sealing piece so that the sealing piece blocks the liquid inlet. At this time, the coating layer metal liquid in the composite furnace cannot pass through the liquid inlet and enter the continuous casting gap. Therefore, the original core material can be quickly removed and replaced with a new core material, and then the sealing piece is removed, so that the coating layer metal liquid in the composite furnace can pass through the liquid inlet and enter the continuous casting gap and contact with the subsequently replaced core material, thereby quickly continuing the forming of the composite wire.

[0007] The beneficial effects of this solution are:

[0008] 1. The mold adopts an integrated structure and is machined in one step. The upper and lower parts have high alignment, which can improve the thickness uniformity of the composite wire coating.

[0009] 2. Effectively improve the forming efficiency of composite wires: Compared with the traditional method, it takes a long time to remove the coating metal liquid in the composite furnace after changing the core material model, which affects the forming efficiency of the composite wires. In this application, by setting the mold body and the plugging parts on the mold body, the core material can be replaced quickly without discharging the coating metal liquid in the composite furnace, which effectively improves the forming efficiency of the composite wires.

[0010] 3. Effective energy saving: In this application, since the time for replacing the core material is greatly reduced, the energy consumption of equipment such as the ineffective heating composite furnace and the melting furnace can be effectively reduced, and the cost of composite wire forming can be saved.

[0011] 4. It is beneficial to improve the forming quality of the composite wire: In the present application, it is not necessary to drain the coating layer molten metal in the composite furnace when replacing the core material, so the amount of the coating layer molten metal in the composite furnace can be effectively maintained and the stable temperature environment in the composite furnace can be maintained, so that the coating layer molten metal can be more stably compounded with the core material to obtain a composite wire of excellent quality.

[0012] Preferably, as an improvement, the liquid inlet portion includes a liquid inlet hole opened on the outer wall of the mold body.

[0013] In this solution, the molten metal of the coating layer can quickly enter the continuous casting gap through the liquid inlet hole, and the structure is simple and the processing is convenient.

[0014] Preferably, as an improvement, the mold body is cylindrical, the number of the liquid inlet holes is at least two, and all the liquid inlet holes are evenly arranged along the circumference of the mold body.

[0015] In this solution, multiple liquid inlet holes are provided so that the molten metal of the coating layer can be filled into the continuous casting gap more quickly and evenly, so that the outer wall of the core material can be more evenly and stably compounded with the molten metal of the coating layer.

[0016] Preferably, as an improvement, the cross section of the liquid inlet hole is rectangular, the height of the liquid inlet hole is 5-50 mm, and the width of the liquid inlet hole is 1 / 3-2 / 3 of the diameter of the mold body.

[0017] In this scheme, if the height of the liquid inlet hole is too large, the contact length between the molten metal of the coating layer and the core material will be too long, and the temperature of the contact surface between the core material and the coating layer will be too high, which will affect the composite quality. If the height of the liquid inlet hole is too small, it will easily cause the temperature of the molten metal of the coating layer and the core material to be too low during the composite process, resulting in defects. Therefore, the height of the liquid inlet hole is set to 5-50mm, so that the contact length between the core material and the molten metal of the coating layer is moderate, which is conducive to achieving the optimal continuous casting speed and the best composite effect of the core material and the molten metal of the coating layer; at the same time, the width of the liquid inlet hole mainly determines the contact between the molten metal of the coating layer and the composite cavity in the mold body. The contact area of ​​the inner core material affects the speed of the molten metal of the coating layer entering the mold body, and further affects the stability of the temperature field inside the mold body. If the width of the liquid inlet hole is too large, it will affect the strength of the mold itself and make it easy to be damaged. The width of the liquid inlet hole is set to 1 / 3-2 / 3 of the diameter of the mold body, so that the speed of the molten metal of the coating layer in the mold body entering the mold body is moderate, so that a stable temperature field is maintained in the mold body, so that the molten metal of the coating layer is stably and evenly coated on the core material, so as to produce a composite wire with stable quality, and at the same time extend the service life of the mold body.

[0018] Preferably, as an improvement, the blocking member includes a threading positioning mold and an end head fixedly connected to the threading positioning mold, the threading positioning mold is slidably connected in the wire entry hole, and the diameter of the end head is larger than the diameter of the wire entry hole.

[0019] In this solution, the liquid inlet hole can be conveniently blocked or opened by sliding the threading positioning mold, and the operation is simple. Moreover, by setting the end head, the threading positioning mold can be conveniently adjusted using the end head.

[0020] Preferably, as an improvement, one end of the plugging member close to the end head is fixedly connected to a glass conduit, and the glass conduit is coaxially arranged with the solidification-molded sizing hole.

[0021] In this solution, by setting up a glass conduit, the glass conduit can be used to provide guidance for the transmission of the core material, so that the core material and the solidification forming sizing hole are aligned, so that a coating layer with uniform thickness is formed on the outer wall of the core material; at the same time, the glass conduit is used to insulate the core material, preventing the core material from rapidly rising in temperature after entering the composite furnace, causing the core material to be too high in temperature when moving to the continuous casting gap, and avoiding the melting of the core material metal after being coated with the coating layer metal liquid or the transition fusion of the coating interface.

[0022] The composite furnace for wire solid-liquid continuous casting comprises a base body and a composite cavity arranged in the base body, wherein a plurality of wire solid-liquid continuous casting molds are arranged in the composite cavity, and a heating mechanism for heating the composite cavity is connected to the base body.

[0023] In the present solution, a plurality of wire solid-liquid continuous casting molds are arranged in the composite cavity, and a plurality of composite wires are simultaneously formed by using the plurality of wire solid-liquid continuous casting molds. The composite wires formed by adjacent wire solid-liquid continuous casting molds may be of the same model or of different models, thereby improving the speed and model range of composite wires formed by the composite furnace for wire solid-liquid continuous casting in the present application. At the same time, since a sealing member structure is provided in each solid-liquid continuous casting mold, the sealing member in each solid-liquid continuous casting mold may be used to seal the liquid inlet. Therefore, the core material of the composite wire formed by one of the solid-liquid continuous casting molds may be conveniently replaced without affecting the forming of composite wires by other solid-liquid continuous casting molds, without discharging the coating metal liquid in the composite cavity and affecting the forming of composite wires by other solid-liquid continuous casting molds.

[0024] Preferably, as an improvement, the seat body is connected to a cooling mechanism that cooperates with the mold for solid-liquid continuous casting of wire rod.

[0025] In this solution, a cooling mechanism is used to cool the molten metal of the coating layer after it is composited onto the core material, so that the composite wire is cooled quickly.

[0026] Preferably, as an improvement, the cooling mechanism includes a cooling crystallizer connected to the base body, and the cooling crystallizer is located on the end of the mold body away from the wire inlet hole.

[0027] In this solution, the mold body is cooled by a cooling crystallizer, which is beneficial for the mold body to maintain a stable temperature range, so that the composite wire can be composited stably and continuously.

[0028] Preferably, as an improvement, the matching length between the cooling crystallizer and the mold body is equal to 4-10 times the wire diameter of the composite wire.

[0029] In this solution, by setting the length of the cooling crystallizer and the mold body to 4-10 times the wire diameter of the composite wire, the cooling effect of the cooling crystallizer on the mold body is moderate, avoiding the situation where leakage occurs due to insufficient cooling intensity, or excessive cooling intensity affects the continuous casting surface quality and continuous casting speed, resulting in an increase in the cost of composite wire forming. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a front cross-sectional view of the composite furnace for solid-liquid continuous casting of wire in the first embodiment of the present invention.

[0031] Figure 2 It is a schematic diagram of the mold body in the first embodiment of the invention.

[0032] Figure 3 It is a front cross-sectional view of the composite furnace for solid-liquid continuous casting of wire in the second embodiment of the present invention.

[0033] Figure 4 It is a cross-sectional view of the composite wire in the present invention. DETAILED DESCRIPTION

[0034] The following is further described in detail through specific implementation methods:

[0035] The reference numerals in the drawings of the specification include: mold body 1, solidification molding sizing hole 2, liquid inlet hole 3, threading positioning mold 4, end 5, wire inlet hole 6, seat body 7, composite cavity 8, liquid adding pipeline 9, heating coil 10, cooling crystallizer 11, glass conduit 12.

[0036] Embodiment 1

[0037] Embodiment 1 is basically as shown in the attached Figure 1 As shown: a mold for solid-liquid continuous casting of wire, comprising a cylindrical mold body 1, a solidification forming sizing hole 2 with an inner diameter larger than the core material diameter is opened in the mold body 1 along its own center line direction, a continuous casting gap is provided between the inner wall of the solidification forming sizing hole 2 and the outer wall of the core material, and the coating layer molten metal in the prior art is introduced into the continuous casting gap, so that the coating layer molten metal can be automatically coated and compounded on the outer wall of the core material to form a composite wire.

[0038] In order to enable the molten metal on the coated side in the prior art to stably enter the continuous casting gap, a liquid inlet portion connected to the solidification molding sizing hole 2 is opened near the middle position of the outer wall of the mold body 1, and the liquid inlet portion includes a liquid inlet hole 3 opened on the outer wall of the mold body 1. The number of the liquid inlet holes 3 is multiple, and the multiple liquid inlet holes 3 are evenly arranged along the circumference of the mold body 1. In this embodiment, the number of the liquid inlet holes 3 is two and the cross-section of the liquid inlet holes 3 is rectangular. The height of the liquid inlet hole 3 is 5-50mm, and the width of the liquid inlet hole 3 is 1 / 3-2 / 3 of the diameter of the mold body 1. In this embodiment, the height of the liquid inlet hole 3 is preferably 45mm, and the width of the liquid inlet hole 3 is preferably 2 / 3 of the diameter of the mold body 1.

[0039] Combination Figure 1 and Figure 2 A vertically arranged wire inlet hole 6 is provided at the top of the mold body 1. The wire inlet hole 6 is coaxially arranged with the solidification molding sizing hole 2 and the diameter of the wire inlet hole 6 is larger than the diameter of the solidification molding sizing hole 2. A sealing member for sealing the liquid inlet hole 3 is vertically slidably connected in the wire inlet hole 6. In this embodiment, the sealing member includes a threading positioning mold 4 and an end head 5 integrally formed at the top of the threading positioning mold 4. A through hole for vertical sliding of the core material is provided inside the threading positioning mold 4, wherein the diameter of the end head 5 is larger than the diameter of the wire inlet hole 6, so that the threading positioning mold 4 can be vertically slidably connected to the wire inlet hole 6 without the end head 5 entering the wire inlet hole 6. Specifically, the threading positioning mold 4 is connected to the mold body 1 in a threaded manner. By rotating the end head 5, the threading positioning mold 4 can slide vertically in the wire inlet hole 6. In other embodiments other than the present embodiment, the threading positioning mold 4 can also be driven vertically by external force, which will not be repeated here.

[0040] The composite furnace for solid-liquid continuous casting of wire rod comprises a base body 7 and a composite cavity 8 arranged in the base body 7. A liquid adding pipe 9 connected to the composite cavity 8 is arranged near the bottom on the right side of the base body 7. The liquid adding pipe 9 can be used to add a coating layer of metal liquid for coating the outer wall of the core material into the composite cavity 8. In this embodiment, Figure 4As shown in a, the core material is a single 45# steel wire, and the cross section of the core material is a circle with a diameter of 20mm. The molten metal of the coating layer is pure copper and the thickness of the coating layer is 2.5mm, so that the cross section of the composite wire is a circle with a diameter of 25mm. A plurality of the above-mentioned wire solid-liquid continuous casting molds are arranged in the composite cavity 8. In this embodiment, the number of the wire solid-liquid continuous casting molds is four, and the four wire solid-liquid continuous casting molds are arranged side by side in a horizontal direction. A heating mechanism for heating the composite cavity 8 is connected to the seat body 7. In this embodiment, the heating mechanism includes a heating coil 10 arranged on the outside of the seat body 7. At the same time, the seat body 7 is connected to a cooling mechanism that cooperates with the mold for solid-liquid continuous casting of the wire. The cooling mechanism includes a cooling crystallizer 11 fixedly connected to the bottom of the seat body 7 by screws. The cooling crystallizer 11 is located at the bottom end of the mold body 1 and the matching length of the cooling crystallizer 11 and the mold body 1 is equal to 4-10 times the wire diameter of the composite wire. In order to have a stable cooling effect, in this embodiment, the preferred matching length of the cooling crystallizer 11 and the mold body 1 is equal to 8 times the wire diameter of the composite wire.

[0041] The specific implementation process is as follows:

[0042] When forming the composite wire, the end head 5 is rotated so that the threading positioning mold 4 slides upward relative to the mold body 1. At this time, the threading positioning mold 4 will not block the liquid inlet hole 3, and the brass liquid in the composite cavity 8 can enter the solidification molding sizing hole 2 through the liquid inlet hole 3, and then the core material is passed through the threading positioning mold 4 and the mold body 1 from top to bottom in turn, and finally passed from the bottom end of the mold body 1 to the bottom of the seat body 7. When the core material passes through the liquid inlet hole 3, the brass liquid enters the continuous casting gap and automatically covers and compounds the outer wall of the core material to obtain a composite wire. When the composite wire continues to move downward and passes through the cooling crystallizer 11, the cooling crystallizer 11 cools the composite wire, further assists the compounding of the composite wire, so that the core material and the brass liquid are completely recrystallized to obtain a composite wire with excellent quality.

[0043] When it is necessary to form composite wires of different sizes and replace core materials of different types, it is only necessary to rotate the end head 5 to make the threading positioning mold 4 slide downward. When the bottom end of the threading positioning mold 4 is against the bottom wall of the liquid inlet hole 3, the brass liquid in the composite cavity 8 cannot enter the continuous casting gap. At this time, the original core material can be quickly removed, and then the replaced core material can be inserted. When the end of the core material passes through the mold body 1 and moves to the bottom of the seat body 7, the end head 5 is rotated again to make the threading positioning mold 4 move upward. At this time, the brass liquid in the composite cavity 8 passes through the liquid inlet hole 3 again and enters the continuous casting gap, so that the replaced core material is compounded with the brass liquid to obtain a composite wire.

[0044] At the same time, in the present embodiment, since a threading positioning mold 4 is provided on each mold body 1, the threading positioning mold 4 on each mold body 1 can individually control the forming of the composite wire on the corresponding mold body 1, so the forming of the composite wires on adjacent mold bodies 1 does not interfere with each other. During the forming process of the composite wires, the core materials on different mold bodies 1 can be replaced successively. Since the normal supply of the brass liquid in the composite cavity 8 is not affected when the core material is replaced, the other mold bodies 1 can still stably form the composite wires, thereby ensuring the efficient production of the composite wires.

[0045] Embodiment 2

[0046] The difference between the second embodiment and the first embodiment is that: Figure 3 As shown, the threading positioning mold 4 is clamped with a glass tube 12 coaxially and vertically arranged with the threading positioning mold 4 near the top, and the inner diameter of the glass tube 12 is slightly larger than the diameter of the core material (for different types of core materials, the inner diameter of the glass tube 12 can be set to multiple correspondingly to meet the use of different types of core materials), so that when the core material can pass through the glass tube 12, the glass tube 12 can play a role of vertically guiding the core material; at the same time, Figure 4 As shown in b, in this embodiment, the core material is a single pure copper wire and the cross-section of the core material is a 17×17 mm square. The material of the molten metal of the coating layer is H65 brass, and the thickness of the coating layer is 1.5 mm, so that the cross-section of the composite wire is a 20×20 mm square.

[0047] In this embodiment, the glass conduit 12 is provided, and the glass conduit 12 can guide the core material, so that the core material can be more accurately aligned with the solidification forming sizing hole 2 of the mold body 1, so that the brass liquid can be evenly coated and compounded on the outer wall of the core material, thereby obtaining a composite wire with better quality; at the same time, the glass conduit 12 can play a certain heat insulation role, so that the core material will not heat up rapidly when entering the composite cavity 8, so that when the core material and the brass liquid are in contact, there is an appropriate temperature difference between the two, so that the brass liquid can be quickly and stably compounded on the outer wall of the core material, thereby improving the quality of the composite wire.

[0048] Embodiment 3

[0049] The difference between the third embodiment and the second embodiment is that: Figure 4 As shown in c, in this embodiment, the core material is seven copper strands and the diameter of a single copper strand is 2 mm, and the thickness of the coating layer is 1 mm at the thinnest point, so that the cross-section of the composite wire is a circle with a diameter equal to 8 mm.

[0050] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A mold for solid-liquid continuous casting of wire, characterized by: The invention comprises a mold body, wherein a solidification forming sizing hole is provided in the mold body, and a continuous casting gap is provided between the inner wall of the solidification forming sizing hole and the outer wall of the core material; a liquid inlet portion connected to the solidification forming sizing hole is provided on the outer wall of the mold body, and a wire inlet hole coaxially arranged with the solidification forming sizing hole and having a diameter larger than the diameter of the solidification forming sizing hole is provided at one end of the mold body, and a plugging member for plugging the liquid inlet portion is slidably connected in the wire inlet hole, and a through hole coaxially arranged with the solidification forming sizing hole is provided in the plugging member; the liquid inlet portion comprises a liquid inlet hole provided on the outer wall of the mold body, the mold body is cylindrical, the number of the liquid inlet holes is at least two, and all the liquid inlet holes are evenly arranged along the circumference of the mold body; the plugging member comprises a threading positioning mold and an end fixedly connected to the threading positioning mold, the threading positioning mold is slidably connected in the wire inlet hole, and the diameter of the end head is larger than the diameter of the wire inlet hole; a glass conduit is fixedly connected to one end of the plugging member close to the end head, and the glass conduit is coaxially arranged with the solidification forming sizing hole.

2. The wire solid-liquid continuous casting mold according to claim 1, characterized in that: The cross section of the liquid inlet hole is rectangular, the height of the liquid inlet hole is 5-50 mm, and the width of the liquid inlet hole is 1 / 3-2 / 3 of the diameter of the mold body.

3. Composite furnace for solid-liquid continuous casting of wire, characterized by: It comprises a seat body and a composite cavity arranged in the seat body, wherein the composite cavity is provided with a plurality of molds for solid-liquid continuous casting of wire according to any one of claims 1-2, and a heating mechanism for heating the composite cavity is connected to the seat body.

4. The composite furnace for solid-liquid continuous casting of wire rod according to claim 3, characterized in that: The seat body is connected with a cooling mechanism matched with the mold for solid-liquid continuous casting of wire rods.

5. The composite furnace for solid-liquid continuous casting of wire rod according to claim 4, characterized in that: The cooling mechanism comprises a cooling crystallizer connected to the base body, and the cooling crystallizer is located at an end of the mold body away from the wire inlet hole.

6. The composite furnace for solid-liquid continuous casting of wire rod according to claim 5, characterized in that: The matching length between the cooling crystallizer and the mold body is equal to 4-10 times the wire diameter of the composite wire.

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