Combined die for vacuum casting

Abstract

The utility model discloses a combined die for vacuum casting, which comprises a rectangular fastening frame, and the rectangular fastening frame comprises two fastening long plates which are oppositely arranged and two fastening short plates which are oppositely arranged; the mold comprises two mold long plates and two mold short plates which are equal in height; the two mold long plates extend in the length direction of the fastening long plate and are arranged between the two mold long plates at an interval; the two mold short plates extend in the length direction of the fastening short plate and are arranged between the two mold short plates in a spaced mode, the two length ends of the two mold short plates abut against the two opposite surfaces of the two mold long plates respectively, and the two mold short plates can move oppositely between the two mold long plates; and the jacking assembly comprises a jacking rod, and the jacking rod can move towards the mold long plates in the direction perpendicular to the fastening long plates relative to one fastening long plate and is jacked on the surfaces, facing the fastening long plates, of the mold long plates, so that the two mold short plates are clamped by the two mold long plates. The die is easy to separate and long in service life.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum melting and casting molds for nonferrous metals and alloys, and more specifically, to a combined mold for vacuum melting and casting. Background Art

[0002] Nonferrous metals and alloys are melted and cast to produce corresponding ingot products, in which the mold is a key auxiliary object that determines the shape of the ingot.

[0003] There are several types of existing molds. One is to use welding to make the mold materials tightly combined so that they will not break at high temperatures. If the prepared material has expansion characteristics, such as silicon alloy ingots, there will be a problem of difficulty in demolding. The second is to use a combined mold, drill holes in the mold, and fix it with screws. At high temperatures, the screws have deformed and stuck in the holes, which requires further processing, and the service life of the mold is reduced.

[0004] Therefore, how to provide a mold that can solve the problems of difficulty in separating ingots and molds and low mold service life during the smelting and casting of non-ferrous metals and alloys has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0005] The utility model aims to provide a mold which is easy to separate the ingot and the mold and has a long service life in the process of melting and casting nonferrous metals and alloys.

[0006] The utility model provides a combined mold for vacuum melting and casting, comprising a rectangular fastening frame, wherein the rectangular fastening frame comprises two fastening long plates arranged opposite to each other and two fastening short plates arranged opposite to each other;

[0007] The mold comprises two mold long plates and two mold short plates of equal height; the two mold long plates extend along the length direction of the fastening long plate and are spaced between the two mold long plates; the two mold short plates extend along the length direction of the fastening short plate and are spaced between the two mold short plates, the two ends of the length of the two mold short plates respectively abut against two opposite surfaces of the two mold long plates, and the two mold short plates can move toward each other between the two mold long plates;

[0008] The clamping assembly includes a push rod, which can move toward the mold long plate relative to a fastening long plate in a direction perpendicular to the fastening long plate and press against the surface of the mold long plate facing the fastening long plate to clamp the two mold short plates with the two mold long plates.

[0009] Optionally, one of the fastening long plates is provided with a slide groove extending along its length direction;

[0010] The tightening assembly includes a nut and a screw; the nut is located in the slide groove and can slide along the length direction of the slide groove, and the nut and the slide groove are locked in the circumferential direction of the nut; the screw is threadedly matched with the nut, and can move toward the mold long plate relative to the nut and press against the surface of the mold long plate.

[0011] Optionally, the tightening assembly also includes a limit plate, which is fixedly connected to the side of the nut facing the long plate of the mold. The limit plate includes a screw through hole, the inner diameter of the screw through hole is greater than or equal to the inner diameter of the nut, and the screw through hole is coaxial with the nut.

[0012] Optionally, in the width direction of the slide groove, the outer edge of the limiting plate exceeds the groove width of the slide groove by 5 mm to 10 mm.

[0013] Optionally, the tightening assembly further includes a top plate, and one end of the screw rod facing the long plate of the mold is fixedly connected with a top plate perpendicular to the screw rod, and the top plate abuts against the long plate of the mold.

[0014] Optionally, the tightening assembly further includes a positioning ring, which is welded at the center of the top plate, and one end of the screw rod is located in the positioning ring and fixedly connected.

[0015] Optionally, two slide grooves are arranged in sequence in the height direction of the fastening long plate, two nuts are arranged in each slide groove, and each nut is screwed with a screw rod that matches it.

[0016] Optionally, the two slide grooves are respectively located at one third of the distance from the top of the mold long plate and one third of the distance from the bottom of the mold long plate.

[0017] Optionally, in the tightened state, the position of the screw rod pressing against the long plate of the mold is located on the lengthwise extension line of the short plate of the mold.

[0018] Optionally, the rectangular fastening frame is made of cast iron with a thickness of 5 mm to 10 mm;

[0019] And / or, the height of the rectangular fastening frame is 50 mm less than the long plate of the mold.

[0020] According to the technical content disclosed in the utility model, the following beneficial effects are achieved:

[0021] The utility model provides a combined mold for vacuum melting and casting, comprising a rectangular fastening frame and a mold, wherein the mold comprises two mold long plates and two mold short plates of equal height; the two ends of the length of the two mold short plates respectively abut against two opposite surfaces of the two mold long plates, and the two mold short plates can move toward each other between the two mold long plates; therefore, the shape and size of the mold casting space can be adjusted by adjusting the positions of the two mold short plates, and after the positions of the two mold short plates are determined, a tightening component is used to tighten the mold long plates for casting; after the ingot casting is completed, the tightening component is loosened, and since the mold long plates and the mold short plates are split structures, the mold can be easily disassembled, and at the same time, the mold long plates and the mold short plates are not fixed with screws, so there is no problem of the screws being deformed and stuck in the holes at high temperatures, thereby improving the service life of the mold.

[0022] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0024] Figure 1 The utility model is a schematic diagram of the structure of the combined mold for vacuum melting and casting.

[0025] Figure 2 The utility model is a schematic diagram of the mold long plate structure of the combined mold for vacuum melting and casting.

[0026] Explanation of the accompanying drawings: 1. rectangular fastening frame; 11. fastening long plate; 111. slide groove; 12. fastening short plate; 2. mold; 21. mold long plate; 22. mold short plate; 3. casting space; 41. top plate; 42. limit plate; 43. screw; 44. nut. DETAILED DESCRIPTION

[0027] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0028] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0029] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0030] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0031] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0032] The utility model mainly comprises a combined mold, and realizes simple fastening, makes the mold easy to demould and has a long service life, and is suitable for melting and casting nonferrous metals and alloy products with a medium frequency furnace below 50kg.

[0033] See also Figure 1 and Figure 2 The utility model discloses a combined mold 2 for vacuum melting and casting, comprising a rectangular fastening frame 1, a mold 2 and a top tightening component.

[0034] The rectangular fastening frame 1 is a whole, which is made of a long plate that is bent 90 degrees three times and then the two free ends are welded or bolted together; it can also be made of two long plates and two short plates that are fixed by welding or bolting; it is made of cast iron with a thickness of 5mm-10mm, including two fastening long plates 11 that are relatively set and fixedly connected and two fastening short plates 12 that are relatively set; one fastening long plate 11 where the long side of the rectangular fastening frame 1 is located is provided with two parallel and extending along its length direction. Slide groove 111, the groove width of the slide groove 111 is 20mm, which is suitable for placing an M12 nut; the length of the slide groove 111 is slightly smaller than the length of the fastening long plate 11, specifically, the length of the slide groove 111 is slightly smaller than the length of the fastening long plate 11 by 10mm-20mm; both ends of the length of the slide groove 111 are sealed structures; the two slide grooves 111 are arranged in sequence in the height direction of the fastening long plate 11, and the two slide grooves 111 are respectively located at one-third of the distance from the top of the mold long plate 21 and one-third of the distance from the bottom of the mold long plate 21.

[0035] The mold 2 includes two mold long plates 21 and two mold short plates 22 of equal height; the two mold long plates 21 extend along the length direction of the fastening long plate 11 and are spaced between the two mold long plates 21; the two mold short plates 22 extend along the length direction of the fastening short plate 12 and are spaced between the two mold short plates 22, the two ends of the length of the two mold short plates 22 respectively abut against the two opposite surfaces of the two mold long plates 21, the two mold short plates 22 and the two mold long plates 21 enclose a casting space 3, and the two mold short plates 22 can move toward each other between the two mold long plates 21 to adjust the length of the casting space 3; wherein the length of the mold short plate 22 is 10mm-20mm shorter than the length of the fastening short plate 12; the height of the mold 2 is 50mm higher than the height of the rectangular fastening frame 1 to prevent the rectangular fastening frame 1 from being the same height as the mold 2 or higher than the mold 2, and the molten metal may be on the rectangular fastening frame 1 during casting, thereby causing adhesion.

[0036] The pushing assembly includes a pushing rod, which can move toward the mold long plate 21 relative to a fastening long plate 11 in a direction perpendicular to the fastening long plate 11, and push against the surface of the mold long plate 21 facing the fastening long plate 11 to enable the two mold long plates 21 to clamp the two mold short plates 22. Specifically, the tightening assembly includes a nut 44, a limit plate 42, a positioning ring, a top plate 41 and a screw 43; the nut 44 is an M12 nut, which is located in the slide groove 111 and can slide along the length direction of the slide groove 111, and the nut 44 and the slide groove 111 are locked in the circumferential direction of the nut 44; the positioning ring is welded at the center of the top plate 41, and one end of the screw 43 is located in the positioning ring and fixedly connected, that is, the limit plate 42 is fixedly connected to the side of the nut 44 facing the mold long plate 21 to prevent the nut 44 from falling off from the slide groove 111; the limit plate 42 also includes a through hole for the screw 43, the inner diameter of the through hole of the screw 43 is greater than or equal to the inner diameter of the nut 44, and the through hole of the screw 43 is coaxial with the nut 44; in the width direction of the slide groove 111, the outer edge of the limit plate 42 exceeds the groove width of the slide groove 111 by 5mm to 10mm. The screw rod 43 is threadably matched with the nut 44 and can move relative to the nut 44 toward the mold long plate 21 and abut against the surface of the mold long plate 21. One end of the screw rod 43 facing the mold long plate 21 is fixedly connected with a top plate 41 perpendicular to the screw rod 43, and the top plate 41 abuts against the mold long plate 21.

[0037] Furthermore, two slide grooves 111 are sequentially arranged in the height direction of the fastening long plate 11, and two nuts 44 are arranged in each slide groove 111, and a screw rod 43 is screwed on each nut 44 to cooperate with it. In the fastened state, the position where the screw rod 43 presses against the mold long plate 21 is located on the lengthwise extension line of the mold short plate 22.

[0038] Example 1: Production of silicon-aluminum alloy ingots using the combined mold 2 of the utility model has no demoulding difficulty and coil collision phenomenon, the demoulding rate is 100%, the ingot appearance is complete, no edge cracking phenomenon occurs, and the qualified rate is 100%.

[0039] Example 2: Production of nickel-chromium alloy ingots, using the combined mold 2 of the utility model, continuous production of 50 batches, the screws did not change at all, the screws and nuts were connected smoothly, and the production continuity was 100%.

[0040] Comparative Example 1, the production of silicon aluminum alloy ingots, using welding mold 2, due to the expansion of the material, demoulding is difficult, 80% of the ingots need to be demoulded by external force means such as knocking to obtain the ingots. Under the action of external force, the ingots are prone to edge cracking, and the qualified rate is only 70%.

[0041] Comparative Example 2, the production of nickel-chromium alloy ingots, adopts the screw fastening production in mold 2. After 10 continuous melting and casting at high temperature, the screw broke in the fastening mouth and could not be taken out. The corresponding plate surface had to be reprocessed before production could be continued.

[0042] In summary, the combined mold 2 for vacuum melting and casting provided by the utility model, after the mold 2 is placed according to the specifications and dimensions of the ingot, the screw 43 is screwed inward, the top plate 41 squeezes the mold long plate 21 of the mold 2 inward, and the nut drives the limit plate 42 outward relative to the top plate 41, thereby playing the role of fastening the mold 2. The outer layer of the mold 2 is only increased by 5mm-10mm in thickness, which effectively reduces the contact probability between the mold 2 and the induction coil, and improves the production efficiency of non-ferrous metal and alloy ingots.

[0043] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A vacuum casting assembly mold, characterized in that: include: A rectangular fastening frame, comprising two oppositely disposed long fastening plates and two oppositely disposed short fastening plates; The mold comprises two mold long plates and two mold short plates of equal height; the two mold long plates extend along the length direction of the fastening long plates and are spaced between the two mold long plates; the two mold short plates extend along the length direction of the fastening short plates and are spaced between the two mold short plates, the two ends of the length of the two mold short plates respectively abut against two opposite surfaces of the two mold long plates, and the two mold short plates can move toward each other between the two mold long plates; The pushing assembly includes a pushing rod, which can move toward the mold long plate relative to one of the fastening long plates in a direction perpendicular to the fastening long plate, and push against the surface of the mold long plate facing the fastening long plate to enable the two mold long plates to clamp the two mold short plates.

2. The vacuum casting assembly mold according to claim 1, characterized in that: One of the fastening long plates is provided with a slide groove extending along its length direction; The tightening assembly includes a nut and a screw; the nut is located in the slide groove and can slide along the length direction of the slide groove, and the nut and the slide groove are locked in the circumferential direction of the nut; the screw is threadedly engaged with the nut, and can move toward the mold long plate relative to the nut and press against the surface of the mold long plate.

3. The vacuum melting and casting combined mold according to claim 2, characterized in that: The tightening assembly also includes a limit plate, which is fixedly connected to the side of the nut facing the long plate of the mold. The limit plate includes a screw through hole, the inner diameter of the screw through hole is greater than or equal to the inner diameter of the nut, and the screw through hole is coaxial with the nut.

4. The vacuum melting and casting combined mold according to claim 3, characterized in that: In the width direction of the slide groove, the outer edge of the limit plate exceeds the groove width of the slide groove by 5 mm to 10 mm.

5. The vacuum melting and casting combined mold according to claim 2, characterized in that: The tightening assembly also includes a top plate, and one end of the screw rod facing the mold long plate is fixedly connected with the top plate perpendicular to the screw rod, and the top plate abuts against the mold long plate.

6. The vacuum melting and casting combined mold according to claim 5, characterized in that: The tightening assembly further comprises a positioning ring, which is welded at the center of the top plate, and one end of the screw rod is located in the positioning ring and fixedly connected.

7. The vacuum melting and casting assembly mold according to any one of claims 2 to 6, characterized in that: The two slide grooves are arranged in sequence in the height direction of the fastening long plate, two nuts are arranged in each slide groove, and each nut is screwed with a screw rod matched with it.

8. The vacuum melting and casting combined mold according to claim 7, characterized in that: The two slide grooves are respectively located at one third of the distance from the top of the mold long plate and one third of the distance from the bottom of the mold long plate.

9. The vacuum melting and casting combined mold according to claim 7, characterized in that: In the tightened state, the position of the screw rod pressing against the long plate of the mold is located on the extension line of the length direction of the short plate of the mold.

10. The vacuum melting and casting assembly mold according to any one of claims 1 to 6, characterized in that: The rectangular fastening frame is made of cast iron with a thickness of 5mm-10mm; And / or, the height of the rectangular fastening frame is 50 mm less than the long plate of the mold.

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