Exothermic riser for lost foam casting and use method of exothermic riser

Abstract

The invention belongs to the technical field of casting risers, and particularly relates to an exothermic riser for lost foam casting and a using method thereof. The riser comprises a riser body, the riser body comprises two half risers which can be detached, and the riser body comprises a cylinder part and a cone part; the locking assembly is used for locking and fixing the two half risers; the locking assembly comprises a transverse frame, and a pair of clamping blocks corresponding to the two half risers are symmetrically connected to the transverse frame in a sliding mode. A pair of vertically-arranged sliding rails are fixedly connected to the lower portion of the transverse frame through a rod body, a pressing assembly is slidably connected to the sliding rails, and the pressing assembly makes contact with the conical part. According to the riser, the locking assemblies are connected to the two half risers, so that the riser body can be quickly mounted and dismounted, the riser can be conveniently dismounted from a casting after being used, and damage to the riser is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of casting riser, in particular to a heating riser for lost foam casting and a using method thereof. BACKGROUND

[0002] Riser refers to the additional part attached to the top or side of the casting to avoid defects in the casting. In the mold, the cavity of the riser is an empty cavity for storing liquid metal, which replenishes the metal during the formation of the casting, prevents shrinkage, porosity, exhaust and slag collection, and the main function of the riser is to compensate. Different functions of the riser, the form, size and opening position are different, so the design of the riser should consider the properties of the casting alloy and the characteristics of the casting. For alloys with small volume shrinkage during solidification (such as gray cast iron), or alloys that do not produce concentrated shrinkage (such as tin bronze), the main function of the riser is to discharge the gas in the cavity and collect the metal liquid mixed with inclusions or oxide film at the liquid flow front to reduce defects on the casting.

[0003] The existing riser is a one-piece structure. After use, the riser is connected to the casting due to the solidification of the liquid metal, making it difficult to disassemble the riser from the casting. The existing disassembly method is to forcibly break the riser by external force, which is easy to damage the riser. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a heating riser for lost foam casting and a using method thereof, which can install and disassemble two half risers through a locking assembly, aiming to solve the problems in the background art.

[0005] To achieve the above technical purposes, the specific technical solutions of the present application are as follows: the present application provides a heating riser for lost foam casting, which comprises: a riser body, the riser body comprises two detachable half risers, and the riser body comprises a cylindrical part and a conical part; a locking assembly for locking and fixing the two half risers; the locking assembly comprises a cross frame, a pair of clamping blocks corresponding to the two half risers are symmetrically connected to the cross frame; a pair of vertically arranged slide rails are fixedly connected to the cross frame through a rod body below the cross frame, a pressing assembly is slidably connected to the slide rail, and the pressing assembly is in contact with the conical part.

[0006] As a preferred technical solution of the present application, the cross frame is rotatably connected with a double-head screw rod, the clamping block is fixedly connected with a sliding block slidably connected with the cross frame, the sliding block is movably connected with the double-head screw rod, and a threaded block threadedly connected with the double-head screw rod is connected to the sliding block, and a first elastic mechanism is connected between the threaded block and the sliding block.

[0007] As a preferred technical scheme of the present application, the threaded block is fixedly connected with a support rod, a connecting rod is rotatably connected between the support rod and the pressing assembly, and the threaded block drives the pressing assembly to move upward along the conical portion when the threaded block moves.

[0008] As a preferred technical scheme of the present application, the pressing seat is rotatably connected with a pressing wheel, a threaded rod is threadedly connected to the sliding seat, one end of the threaded rod is rotatably connected with a connecting block, and the connecting rod is rotatably connected with the connecting block.

[0009] As a preferred technical scheme of the present application, the two half risers are provided with sealing grooves that are connected with each other in cooperation, and the clamping blocks are provided with clamping grooves that cooperate with the edges of the half risers.

[0010] As a preferred technical scheme of the present application, the first elastic mechanism comprises a first sliding rod fixedly connected to the sliding block, a threaded block slidably connected to the first sliding rod, a first cylindrical spring connected to the surface of the first sliding rod, and a limiting nut fixedly connected to the end of the first sliding rod.

[0011] As a preferred technical scheme of the present application, a pair of ropes is fixedly connected between the two pressing assemblies, a pair of moving blocks is symmetrically connected to the two sides of the pressing seat, a second elastic mechanism is connected between the moving blocks and the pressing seat, a rotating block is rotatably connected to the moving block, and the ropes are fixedly connected with the rotating block.

[0012] As a preferred technical scheme of the present application, the second elastic mechanism comprises a second sliding rod fixedly connected to the pressing seat, a stop ring fixedly connected to the end of the second sliding rod, and a second cylindrical spring connected to the surface of the second sliding rod.

[0013] As a preferred technical scheme of the present application, a plurality of pressing blocks are fixedly connected to the ropes, and the pressing blocks are provided with inclined surfaces that abut against the conical portion.

[0014] A use method of a heating riser for lost foam casting, comprising the following steps: Riser installation: the two clamping blocks are clamped at the edge positions of the two half risers, the double-end screw rod is rotated in the forward direction, the two threaded blocks are driven to move close to each other, the clamping blocks are pressed, and then the upper half positions of the two half risers are locked and fixed; the threaded blocks drive the pressing assemblies to move upward at the same time, and the pressing assemblies gradually increase the pressure on the conical portions during the movement process, and the lower half positions of the half risers are locked and fixed; Riser dismounting: reverse rotation of the double-end screw rod drives the two threaded blocks to move away from each other, reducing the pressure on the upper half of the two half-riders; the threaded blocks automatically drive the pressing assembly to descend during the movement, reducing the pressure on the lower half of the two half-riders; and after the threaded blocks move away from each other, an outward pulling force is applied to the clamping blocks, thereby separating the two half-riders.

[0015] The beneficial effects in the present application are: 1、The locking assembly is connected on the two half-riders, so that the installation and dismounting of the riser body can be quickly realized, which facilitates the dismounting of the riser from the casting after use and avoids damage to the riser.

[0016] 2、The locking mechanism drives the threaded blocks to move by rotating the double-end screw rod, thereby locking and fixing the upper half of the riser body, and the threaded blocks drive the pressing assembly to move upward during the movement, thereby locking and fixing the lower half of the riser body, which ensures the sealing property of the riser body. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A structure diagram of a heating riser for lost foam casting is provided in the present application.

[0018] Figure 2 A structure diagram of a riser body is provided in the present application.

[0019] Figure 3 A structure diagram of a locking assembly is provided in the present application.

[0020] Figure 4 A structure diagram of a clamping block is provided in the present application.

[0021] Figure 5 A structure diagram of a pressing assembly is provided in the present application.

[0022] Figure 6 A structure diagram of a rope is provided in the present application.

[0023] In the figure: 1, riser body; 101, half-riders; 1011, cylindrical part; 1012, conical part; 1013, sealing groove; 2, locking assembly; 21, cross frame; 22, clamping block; 221, clamping groove; 222, sliding block; 223, threaded block; 224, first sliding rod; 225, first cylindrical spring; 226, limiting nut; 227, support rod; 23, double-end screw rod; 24, rod body; 25, sliding rail; 26, connecting rod; 27, sliding hole; 3, pressing assembly; 31, sliding seat; 32, pressing seat; 33, guide rail; 34, pressing wheel; 35, moving block; 36, rotating block; 37, second sliding rod; 38, second cylindrical spring; 39, stop ring; 310, elastic member; 311, connecting block; 312, threaded rod; 4, rope; 41, pressing block; 411, inclined surface part. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments.

[0025] Embodiment one: the embodiment discloses a heat generating riser for lost foam casting, as shown in the figure, comprising: a riser body 1, the riser body 1 comprises two detachable half risers 101, a sealing groove 1013 matched and connected with each other is arranged at the connection of the two half risers 101, so as to ensure the sealing property of the riser body 1; and the riser body 1 comprises a cylindrical part 1011 and a conical part 1012, the cylindrical part 1011 is arranged above the conical part 1012; a locking assembly 2 is arranged for locking and fixing the two half risers 101. Figures 1-6 As shown in the figure, the locking assembly 2 comprises a cross frame 21, the cross frame 21 is arranged above the riser body 1, a pair of clamping blocks 22 corresponding to the two half risers 101 is symmetrically and slidably connected to the cross frame 21, a clamping groove 221 matched with the edge of the half riser 101 is arranged on the clamping block 22, so as to facilitate exerting force in different directions on the half riser 101, and facilitate installing and dismounting the riser body 1; a pair of vertical sliding rails 25 is fixedly connected to the cross frame 21 below through a rod 24, a pressing assembly 3 is slidably connected to the sliding rail 25, the pressing assembly 3 is in contact with the conical part 1012; a double-head screw rod 23 is rotatably connected to the cross frame 21, a sliding block 222 slidably connected with the cross frame 21 is fixedly connected to the clamping block 22, a sliding hole 27 slidably connected with the sliding block 222 is arranged on the cross frame 21, the sliding block 222 is movably connected with the double-head screw rod 23, a threaded block 223 threadedly connected with the double-head screw rod 23 is connected to the sliding block 222, and a first elastic mechanism is connected between the threaded block 223 and the sliding block 222; by rotating the double-head screw rod 23, the two threaded blocks 223 are brought close to each other, the first elastic mechanism is compressed under force, the threaded block 223 exerts pressure on the clamping block 22, so that the clamping block 22 clamps and fixes the upper end of the riser body 1.

[0026] Figure 3 As shown in the figure, the locking assembly 2 comprises a cross frame 21, the cross frame 21 is arranged above the riser body 1, a pair of clamping blocks 22 corresponding to the two half risers 101 is symmetrically and slidably connected to the cross frame 21, a clamping groove 221 matched with the edge of the half riser 101 is arranged on the clamping block 22, so as to facilitate exerting force in different directions on the half riser 101, and facilitate installing and dismounting the riser body 1; a pair of vertical sliding rails 25 is fixedly connected to the cross frame 21 below through a rod 24, a pressing assembly 3 is slidably connected to the sliding rail 25, the pressing assembly 3 is in contact with the conical part 1012; a double-head screw rod 23 is rotatably connected to the cross frame 21, a sliding block 222 slidably connected with the cross frame 21 is fixedly connected to the clamping block 22, a sliding hole 27 slidably connected with the sliding block 222 is arranged on the cross frame 21, the sliding block 222 is movably connected with the double-head screw rod 23, a threaded block 223 threadedly connected with the double-head screw rod 23 is connected to the sliding block 222, and a first elastic mechanism is connected between the threaded block 223 and the sliding block 222; by rotating the double-head screw rod 23, the two threaded blocks 223 are brought close to each other, the first elastic mechanism is compressed under force, the threaded block 223 exerts pressure on the clamping block 22, so that the clamping block 22 clamps and fixes the upper end of the riser body 1. As shown in the figure, the locking assembly 2 comprises a cross frame 21, the cross frame 21 is arranged above the riser body 1, a pair of clamping blocks 22 corresponding to the two half risers 101 is symmetrically and slidably connected to the cross frame 21, a clamping groove 221 matched with the edge of the half riser 101 is arranged on the clamping block 22, so as to facilitate exerting force in different directions on the half riser 101, and facilitate installing and dismounting the riser body 1; a pair of vertical sliding rails 25 is fixedly connected to the cross frame 21 below through a rod 24, a pressing assembly 3 is slidably connected to the sliding rail 25, the pressing assembly 3 is in contact with the conical part 1012; a double-head screw rod 23 is rotatably connected to the cross frame 21, a sliding block 222 slidably connected with the cross frame 21 is fixedly connected to the clamping block 22, a sliding hole 27 slidably connected with the sliding block 222 is arranged on the cross frame 21, the sliding block 222 is movably connected with the double-head screw rod 23, a threaded block 223 threadedly connected with the double-head screw rod 23 is connected to the sliding block 222, and a first elastic mechanism is connected between the threaded block 223 and the sliding block 222; by rotating the double-head screw rod 23, the two threaded blocks 223 are brought close to each other, the first elastic mechanism is compressed under force, the threaded block 223 exerts pressure on the clamping block 22, so that the clamping block 22 clamps and fixes the upper end of the riser body 1.

[0027] Figure 5 ​​As shown, the threaded block 223 is fixedly connected with a vertical support rod 227, and the support rod 227 is rotatably connected with a connecting rod 26 between the pressing assembly 3, and the threaded block 223 drives the pressing assembly 3 to move on the surface of the conical part 1012 when moving; the pressing assembly 3 comprises: a sliding seat 31 slidably connected with the sliding rail 25; a pressing seat 32 for pressing the conical part 1012; the pressing seat 32 is provided with a guide rail 33 slidably connected with the sliding seat 31; the pressing seat 32 is rotatably connected with a pressing wheel 34 in contact with the surface of the conical part 1012, facilitating the movement of the pressing assembly 3, and the sliding seat 31 is threadedly connected with a threaded rod 312, one end of the threaded rod 312 is rotatably connected with a connecting block 311, and the connecting rod 26 is rotatably connected with the connecting block 311; the pressing seat 32 and the connecting block 311 are fixedly connected with an elastic member 310, and the position of the connecting block 311 can be adjusted through the threaded rod 312, so as to adjust the elastic force of the elastic member 310 on the pressing seat 32; when the two threaded blocks 223 move close to each other, the pressing assembly 3 is driven to move upward, and in the moving process of the pressing assembly 3, the pressing seat 32 moves towards the sliding seat 31, the elastic member 310 is stressed and compressed, and thus the pressure on the pressing seat 32 is increased, thereby increasing the pressing effect of the pressing seat 32 on the conical part 1012, and simultaneously achieving the effect of pressing the upper half and the lower half of the riser body 1.

[0028] In the embodiment, as shown in Figure 5 and Figure 6 a pair of ropes 4 are fixedly connected between the two pressing assemblies 3, the ropes 4 can adopt a steel wire rope structure, a pair of moving blocks 35 are symmetrically connected on both sides of the pressing seat 32, and a second elastic mechanism is connected between the moving block 35 and the pressing seat 32; the moving block 35 is rotatably connected with a rotating block 36, and the rope 4 is fixedly connected with the rotating block 36; the second elastic mechanism comprises: a second sliding rod 37 fixedly connected with the pressing seat 32; a stop ring 39 fixedly connected with the end of the second sliding rod 37; and a second cylindrical spring 38 connected with the surface of the second sliding rod 37; when the pressing assembly 3 moves upward as a whole, the distance between the two pressing assemblies 3 is increased, so that the circumference of the circle surrounded by the rope 4 is increased, the moving block 35 is driven to move away from the pressing seat 32, the second cylindrical spring 38 is stressed and compressed, and thus the pulling force of the rope 4 on the pressing assembly 3 is increased, so that the pressing effect of the pressing assembly 3 on the lower half of the riser body 1 is better.

[0029] Preferably, a plurality of pressing blocks 41 are fixedly connected with the rope 4, and the pressing block 41 is provided with an inclined surface part 411 abutting against the conical part 1012, so as to press the conical part 1012 through the pressing block 41, thereby increasing the pressing effect on the lower half of the riser body 1.

[0030] The embodiment also discloses a use method of the heat generating riser for expendable pattern casting, based on the structure of the above-mentioned embodiment two, comprising the following steps: Riser installation: two clamping blocks 22 are respectively clamped in the edge position of two half risers 101, the double-end screw rod 23 is rotated forward, the two threaded blocks 223 are driven to move close to each other, the pressure is applied to the clamping blocks 22, and then the upper half position of the two half risers 101 is locked and fixed; the threaded blocks 223 move while driving the compression assembly 3 to move upward, and the compression assembly 3 gradually increases the pressure on the conical part 1012 during the movement, and the lower half position of the half riser 101 is locked and fixed.

[0031] Riser disassembly: reverse rotation of the double-end screw rod 23 drives the two threaded blocks 223 to move away from each other, reducing the pressure on the upper half position of the two half risers 101; the threaded blocks 223 automatically drive the compression assembly 3 to descend during the movement, reducing the pressure on the lower half position of the two half risers 101; and after the threaded blocks 223 move away from each other, the outward pulling force is applied to the clamping blocks 22, so as to separate the two half risers 101.

[0032] Finally, it should be noted that in the description of the present application, it should be noted that the terms "vertical", "upper", "lower", "horizontal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation of the present application.

[0033] The above only describes the preferred embodiments of the present application and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or replace some technical features with equivalent ones. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A heat-generating riser for lost foam casting, characterized in that, include: The riser body (1) includes two detachable half risers (101) and the riser body (1) includes a cylindrical part (1011) and a conical part (1012). Locking assembly (2) for locking and securing the two half risers (101); The locking assembly (2) includes a crossbeam (21), on which a pair of clamps (22) corresponding to the two half risers (101) are symmetrically slidably connected. A pair of vertically arranged slide rails (25) are fixedly connected to the bottom of the cross frame (21) via a rod (24). A clamping component (3) is slidably connected on the slide rails (25), and the clamping component (3) contacts the conical part (1012).

2. The exothermic riser for lost foam casting according to claim 1, characterized in that, A double-ended lead screw (23) is rotatably connected to the crossbar (21), and a slider (222) that is slidably connected to the crossbar (21) is fixedly connected to the clamp (22). The slider (222) is movably connected to the double-ended lead screw (23), and a threaded block (223) that is threadedly connected to the double-ended lead screw (23) is connected to the slider (222). A first elastic mechanism is connected between the threaded block (223) and the slider (222).

3. A heat-generating riser for lost foam casting according to claim 2, characterized in that, A support rod (227) is fixedly connected to the threaded block (223), and a connecting rod (26) is rotatably connected between the support rod (227) and the clamping assembly (3). When the threaded block (223) moves, it drives the clamping assembly (3) to move on the conical part (1012). The clamping assembly (3) includes: a slide (31) which is slidably connected to the slide rail (25); a pressure seat (32) for pressing the conical part (1012); and a guide rail (33) which is slidably connected to the slide (31) on the pressure seat (32).

4. A heat-generating riser for lost foam casting according to claim 3, characterized in that, A pressure wheel (34) is rotatably connected to the pressure seat (32), and a threaded rod (312) is threadedly connected to the slide seat (31). A connecting block (311) is rotatably connected to one end of the threaded rod (312), and the connecting rod (26) is rotatably connected to the connecting block (311). An elastic element (310) is fixedly connected between the pressure seat (32) and the connecting block (311).

5. A heat-generating riser for lost foam casting according to claim 4, characterized in that, The two semi-risers (101) are connected by a sealing groove (1013) that fits together; the clamp (22) is provided with a slot (221) that fits with the edge of the semi-riser (101).

6. A heat-generating riser for lost foam casting according to claim 5, characterized in that, The first elastic mechanism includes: a first slide rod (224) fixedly connected to the slider (222); a threaded block (223) slidably connected to the first slide rod (224); a first cylindrical spring (225) connected to the surface of the first slide rod (224), and a limit nut (226) fixedly connected to the end of the first slide rod (224).

7. A heat-generating riser for lost foam casting according to claim 6, characterized in that, A pair of ropes (4) are fixedly connected between the two pressing components (3). A pair of moving blocks (35) are symmetrically connected on both sides of the pressing base (32). A second elastic mechanism is connected between the moving blocks (35) and the pressing base (32). A rotating block (36) is rotatably connected to the moving block (35). The ropes (4) are fixedly connected to the rotating block (36).

8. A heat-generating riser for lost foam casting according to claim 7, characterized in that, The second elastic mechanism includes: a second slide rod (37), which is fixedly connected to the pressure seat (32); a retaining ring (39) is fixedly connected to the end of the second slide rod (37); and a second cylindrical spring (38), which is connected to the surface of the second slide rod (37).

9. A heat-generating riser for lost foam casting according to claim 8, characterized in that, Multiple pressure blocks (41) are fixedly connected to the rope (4), and the pressure blocks (41) are provided with inclined surfaces (411) that fit against the conical part (1012).

10. A method of using a heating riser for lost foam casting, comprising the heating riser for lost foam casting as described in claim 9, characterized in that, Includes the following steps: Riser installation: Place the two clamping blocks (22) on the edges of the two half risers (101) respectively, rotate the double-ended screw (23) in the forward direction, and drive the two threaded blocks (223) to move closer to each other, apply pressure to the clamping blocks (22), and then lock and fix the upper part of the two half risers (101); while the threaded blocks (223) move, they drive the clamping assembly (3) to move upward. During the movement, the pressure of the clamping assembly (3) on the conical part (1012) gradually increases, and locks and fixes the lower part of the half riser (101); Riser disassembly: Rotate the double-ended screw (23) in the opposite direction to move the two threaded blocks (223) away from each other, reducing the pressure on the upper half of the two half risers (101); during the movement of the threaded blocks (223), the clamping assembly (3) is automatically driven to descend, reducing the pressure on the lower half of the two half risers (101); and after the threaded blocks (223) move away from each other, an outward pulling force is applied to the clamping block (22), thereby separating the two half risers (101).

Images