A kind of investment casting die head

Abstract

The utility model discloses a precision casting die head for investment casting, including a pouring cup, the bottom of the pouring cup is connected to a vertical main channel, the side wall of the vertical main channel is connected to a plurality of transverse branch channels, the vertical main channel is connected to a plurality of shrinkage blocks distributed sequentially from top to bottom, the end of the transverse branch channel away from the vertical main channel is provided with a shrinkage block, the width of the shrinkage block is greater than the width of the vertical main channel and the transverse branch channel; the shrinkage block is provided with a water inlet, the water inlet is connected to the inside of the product cavity; the mouth of the pouring cup faces upward, and the edge of the mouth of the pouring cup is made into a flanging structure that is folded outward, so that the edge of the mouth of the pouring cup is smooth. The structural design of the utility model is reasonable, and the cup mouth is smooth by adding a flanging to the cup mouth, which prevents sand residue from falling into the shell mold.

Description

Technical Field

[0001] The utility model relates to the technical field of investment wax precision casting, in particular to an investment wax precision casting pouring die head. Background Art

[0002] Investment casting is also called lost wax casting, which includes the processes of pressing wax, trimming wax, forming trees, dipping slurry, melting wax, pouring molten metal and post-processing. Lost wax casting is to use wax to make a wax mold of the part to be cast, and then apply mud on the wax mold, which is the mud mold. After the mud mold is dried, put it into hot water to melt the wax mold inside. Take out the mud mold with melted wax mold and bake it into a ceramic mold. Once baked, a pouring port is usually left when making the mud mold, and then the molten metal is poured from the pouring port. After cooling, the required parts are made.

[0003] The product cavity (9) required for thin-walled high-temperature resistant automotive parts is as follows Figure 5 As shown, since the existing die head is usually a straight gate rod, the molten metal is poured directly from the gate cup into the bottom of the gate rod. In this process, the shell mold sand residue on the edge of the gate cup is easy to fall into the shell mold (that is, the shell mold sand residue is easy to fall into the gate cup and into the shell mold such as the product cavity), resulting in impurities in the stainless steel metal solution during pouring, resulting in defective stainless steel castings. Utility Model Content

[0004] The utility model aims to provide a casting die head for investment casting, so as to solve the technical problem that the shell mold sand residue at the edge of the cup mouth of the pouring cup of the existing die head easily falls into the shell mold, resulting in impurities in the stainless steel metal solution during pouring, thereby causing the stainless steel casting to produce defective technical problems.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model provides a precision investment casting pouring die head, including a pouring cup, the bottom of the pouring cup is connected to a vertical main channel, the side wall of the vertical main channel is connected to a plurality of transverse branch channels, the vertical main channel is connected to a plurality of shrinkage blocks distributed in sequence from top to bottom, the end of the transverse branch channel away from the vertical main channel is provided with a shrinkage block, the width of the shrinkage block is greater than the width of the vertical main channel and the transverse branch channel; the shrinkage block is provided with a water inlet, and the water inlet is connected to the interior of the product cavity; the mouth of the pouring cup faces upward, and the edge of the mouth of the pouring cup is made into an outwardly folded flange structure to make the edge of the mouth of the pouring cup smooth.

[0006] Furthermore, the flange structure is first folded outwards and then folded downwards.

[0007] Furthermore, the top of the flange structure is a circular ring-shaped plane.

[0008] Furthermore, the bottom of the flange structure is a circular arc groove.

[0009] Furthermore, the upper left side wall, the lower left side wall, the upper right side wall and the lower right side wall of the vertical main channel are respectively connected to the transverse branch channel, and the front and rear ends of the feeding block are respectively provided with the water outlets, which protrude outwards.

[0010] Furthermore, the pouring cup is in the shape of a cone with a diameter gradually increasing from bottom to top, and the front and rear side walls of the pouring cup are respectively provided with filling blocks, the filling blocks are tightly attached to the top of the adjacent water outlet below, the vertical surface of the filling block is parallel to the vertical surface of the water outlet, and the vertical surface of the filling block protrudes outward compared to the vertical surface of the water outlet.

[0011] Furthermore, the two feeding blocks distributed up and down are fused together, and the front and rear ends between the two feeding blocks distributed up and down are respectively provided with transverse surface channels, and the water outlets are respectively provided above and below the transverse surface channels.

[0012] Further, the two feeding blocks distributed along the upper and lower sides and the two feeding blocks distributed along the left and right sides are distributed in a quadrilateral and form a group of the feeding blocks, and the two groups of the feeding blocks are distributed up and down; the front upper part, the front lower part, the rear upper part and the rear lower part of the vertical main flow channel are respectively provided with product cavities, and the product cavity is provided with four cavity legs, and the four cavity legs of the product cavity are respectively connected and cooperated with the water outlet of a group of the feeding blocks to realize the connection between the interior of the feeding block and the interior of the product cavity.

[0013] Furthermore, wax drainage pipes are respectively provided on the left and right sides of the pouring cup, the top end of the wax drainage pipes is connected to the left side wall or the right side wall of the pouring cup, and the bottom end of the wax drainage pipes is connected to the shrinkage block on the upper left side wall or the upper right side wall, so that the interior of the pouring cup is connected to the interior of the shrinkage block through the wax drainage pipes.

[0014] Furthermore, the front and rear side walls of the pouring cup are respectively provided with protruding columns, and the protruding columns are located above the filling block and below the flanging structure. The ends of the left and right shrinkage blocks away from the vertical main channel are provided with cutting positioning columns, and the end of the bottom shrinkage block away from the pouring cup is provided with a shell vibration positioning column.

[0015] In summary, the technical solution of the utility model has the following beneficial effects: the structure design of the utility model is reasonable, (1) by including a pouring cup, the bottom of the pouring cup is connected to a vertical main channel, the side wall of the vertical main channel is connected to a plurality of transverse branch channels, the vertical main channel is connected to a plurality of shrinkage blocks distributed from top to bottom, and a shrinkage block is provided at one end of the transverse branch channel away from the vertical main channel, and the width of the shrinkage block is greater than the width of the vertical main channel and the transverse branch channel; so that when the molten steel is filled, the molten steel will first flow downward from the pouring cup to the vertical main channel, and then disperse from the vertical main channel to the transverse branch channel, and then flow to the adjacent shrinkage block. (2) by providing a water inlet on the shrinkage block, the water inlet is connected to the inside of the product cavity; so that the molten steel can gradually fill the inside of the product cavity through the water inlets at various positions during the flow process. (3) With the mouth of the pouring cup facing upward, the edge of the mouth of the pouring cup is folded outward to make the edge of the mouth of the pouring cup smooth; thus, the cup mouth is smoothed by adding a flange to the cup mouth, preventing sand residue from falling into the shell mold. From the above analysis, it can be seen that the utility model solves the problem of sand residue falling into the shell mold by making a flange structure at the cup mouth of the mold head. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the first viewing angle of the utility model;

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model from a second viewing angle;

[0018] Figure 3 yes Figure 2 A partial enlarged view of the middle filled block;

[0019] Figure 4 It is a three-dimensional structural schematic diagram of the utility model from a third viewing angle;

[0020] Figure 5 It is a three-dimensional structural schematic diagram of the product cavity of the utility model;

[0021] Figure 6 It is a schematic diagram of the three-dimensional structure of the utility model when the product cavity is removed;

[0022] Explanation of the reference numerals: 1- pouring cup, 2- vertical main channel, 3- horizontal branch channel, 4- shrinkage feeding block, 5- filling block, 6- boss, 7- cutting positioning column, 8- shell vibration positioning column, 9- product cavity, 10- wax discharge pipe.

[0023] 101-cup mouth, 102-flange structure, 103-annular plane, 104-annular arc groove; 401-sprue, 402-lateral surface channel; 901-cavity support foot. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention, but this does not constitute a limitation on the protection scope of the present invention.

[0025] In the present invention, for a clearer description, the following explanation is made: the observer faces the attached Figure 1 For observation, the left side of the observer is set as left, the right side of the observer is set as right, the front of the observer is set as front, the rear of the observer is set as rear, the top of the observer is set as top, and the bottom of the observer is set as bottom. It should be pointed out that the terms "front end", "rear end", "left side", "right side", "middle", "top", "bottom" and the like in the text indicate the orientation or position relationship based on the orientation or position relationship set in the drawings, which is only for the convenience of clearly describing the utility model, and does not indicate or imply that the structure or component referred to must have a specific orientation or be constructed in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third", and "fourth" are only used for the purpose of clarity or simplification of description, and cannot be understood as indicating or implying relative importance or quantity.

[0026] See also Figures 1 to 6The present embodiment provides a precision investment casting pouring die head, including a pouring cup 1, the bottom of the pouring cup 1 is connected to a vertical main channel 2, the side wall of the vertical main channel 2 is connected to a plurality of transverse branch channels 3, the vertical main channel 2 is connected to a plurality of shrinkage blocks 4 distributed sequentially from top to bottom, the end of the transverse branch channel 3 away from the vertical main channel 2 is provided with a shrinkage block 4, the width of the shrinkage block 4 is greater than the widths of the vertical main channel 2 and the transverse branch channel 3; the shrinkage block 4 is provided with a water inlet 401, and the water inlet 401 is connected to the inside of the product cavity 9; the cup mouth 101 of the pouring cup 1 faces upward, and the edge of the cup mouth 101 of the pouring cup 1 is made into a flanging structure 102 that is folded outward, so that the edge of the cup mouth 101 of the pouring cup 1 is smooth. Function: (1) It includes a pouring cup, the bottom of the pouring cup is connected to a vertical main channel, the side wall of the vertical main channel is connected to a plurality of transverse branch channels, the vertical main channel is connected to a plurality of feeding blocks distributed from top to bottom, and a feeding block is provided at one end of the transverse branch channel away from the vertical main channel, and the width of the feeding block is greater than the width of the vertical main channel and the transverse branch channel; so that when the molten steel is filled, the molten steel will first flow downward from the pouring cup to the vertical main channel, then disperse from the vertical main channel to the transverse branch channel, and then flow to the adjacent feeding blocks. (2) A water inlet is provided on the feeding block, and the water inlet is connected to the inside of the product cavity; so that the molten steel can gradually fill the inside of the product cavity through the water inlets at various positions during the flow process. (3) With the mouth of the pouring cup facing upward, the edge of the mouth of the pouring cup is made into a flange structure that is folded outward, so that the edge of the mouth of the pouring cup is smooth; thereby, the cup mouth is made smooth by adding a flange at the cup mouth, preventing sand and slag from falling into the shell mold. From the above analysis, it can be seen that the utility model solves the problem of sand and slag falling into the shell mold by making a flange structure at the cup mouth of the die head. It is worth mentioning that, under normal circumstances, the shrinkage feeding block 4 should be as thick as the transverse branch channel 3, but the utility model now enlarges the shrinkage feeding block 7 (and increases the welding position of the water nozzle at the same time), reduces the size of the branches (such as the transverse branch channel 3), thereby reducing the weight and cost of the die head, because the heavier the die head, the lower the utilization rate of the molten steel into the finished product, resulting in an increase in cost, so the utility model can reduce the weight of the die head and achieve the same economic value.

[0027] Specifically, the flange structure 102 is first folded outward and then folded downward. Function: Even if sand residue appears on the outer edge of the flange structure 102, it can be easily dropped from the outer side of the pouring cup, thereby preventing the sand residue from falling into the shell mold.

[0028] Specifically, the top of the flange structure 102 is a circular ring-shaped plane 103. Function: The circular ring-shaped plane 103 makes the top of the flange structure 102 easier to process and smoother.

[0029] Specifically, the bottom of the flange structure 102 is an annular arc groove 104. Function: The annular arc groove 104 makes the bottom of the flange structure 102 more evenly stressed and is convenient for processing and manufacturing.

[0030] Specifically, the upper left side wall, the lower left side wall, the upper right side wall, and the lower right side wall of the vertical main channel 2 are respectively connected with the transverse branch channel 3, and the front and rear ends of the feeding block 4 are respectively provided with water inlets 401, and the water inlets 401 protrude outward. Function: The outwardly protruding water inlets are easier to cooperate with the product cavity, and the position setting of the transverse branch channel can also facilitate the connection between the water inlets and the interior of the product cavity 9.

[0031] Specifically, the pouring cup 1 is in a conical shape with a diameter gradually increasing from bottom to top. The front and rear side walls of the pouring cup 1 are respectively provided with a filling block 5. The filling block 5 is in close contact with the top of the adjacent water outlet 401 below. The vertical surface of the filling block 5 is parallel to the vertical surface of the water outlet 401, and the vertical surface of the filling block 5 is protruding outward compared to the vertical surface of the water outlet 401. Function: The function of the filling block 5 is to fill and level, thereby preventing sand inclusion in the shell. Because if it is not filled and leveled here, there will be an angle between the pouring cup 1 and the water outlet, and sand inclusion in the shell will occur (sand inclusion is a kind of "expansion defect", which has three forms: "rat tail", "groove" and "sand inclusion scar", which is characterized by: there are fine lines with sand on the surface of the cast iron. Strip grooves and scar-like protrusions. The scouring and baking of high-temperature molten iron cause the sand mold to migrate water and expand in volume, causing the surface layer to warp, lift and crack. This is the mechanism of sand inclusion.). The conical pouring cup 1 facilitates pouring.

[0032] Specifically, two feeding blocks 4 distributed up and down are fused together, and the front and rear ends of the two feeding blocks 4 distributed up and down are respectively provided with transverse surface channels 402, and the upper and lower parts of the transverse surface channels 402 are respectively provided with water inlets 401. Function: The setting of the surface channel 402 increases the strength and punching ability of the die head.

[0033] Specifically, two feeding blocks 4 distributed along the upper and lower sides and two feeding blocks 4 distributed along the left and right sides are distributed in a quadrilateral shape and form a group of feeding blocks 4, and the two groups of feeding blocks 4 are distributed in the upper and lower sides; the vertical main channel 2 is provided with product cavities 9 at the upper front, lower front, upper rear, and lower rear, respectively, and the product cavity 9 is provided with four cavity legs 901, and the four cavity legs 901 of the product cavity 9 are respectively connected and matched with the water inlet 401 of a group of feeding blocks 4 to achieve the connection between the inside of the feeding block 4 and the inside of the product cavity 9. Function: The feeding blocks 4 are distributed in a quadrilateral shape, which is more convenient for the product cavity pouring of thin-walled high-temperature resistant automotive parts. By setting two groups of feeding blocks 4 and two product cavities 9 in front and back, the metal liquid can be poured into the product cavity 9 through each water inlet and cavity legs 901, and four cast iron products (i.e., thin-walled high-temperature resistant automotive parts) can be effectively completed at one time.

[0034] Specifically, wax discharge pipes 10 are respectively provided on the left and right sides of the pouring cup 1, the top of the wax discharge pipe 10 is connected to the left side wall or the right side wall of the pouring cup 1, and the bottom of the wax discharge pipe 10 is connected to the feeding block 4 on the upper left side wall or the upper right side wall, so that the interior of the pouring cup 1 is connected to the interior of the feeding block 4 through the wax discharge pipe 10. Function: The wax discharge pipe 10 is a pipe for discharging wax and air when pouring molten metal.

[0035] Specifically, the front and rear side walls of the pouring cup 1 are respectively provided with protruding columns 6, which are located above the filling block 5 and below the flange structure 102. The left and right sides of the feeding blocks 4 are provided with cutting positioning columns 7 at one end away from the vertical main channel 2, and the bottom of the feeding block 4 is provided with a shell vibration positioning column 8 at one end away from the pouring cup 1. Function: Since it was previously a manual operation, the setting of the protruding column 6 (i.e., the position of the manipulator inserting the shell) can now realize automatic operation, because the shell can be used for forking during smelting and pouring. The cutting positioning column 7 is used for automatic cutting and positioning to reduce labor, and the shell vibration positioning column 8 is mainly used for positioning during the shell vibration process.

[0036] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the protection scope of the present invention.

Claims

1. An investment casting die head, comprising a pouring cup (1), characterized in that: The bottom of the pouring cup (1) is connected to a vertical main channel (2), the side wall of the vertical main channel (2) is connected to a plurality of transverse branch channels (3), the vertical main channel (2) is connected to a plurality of shrinkage blocks (4) distributed in sequence from top to bottom, the end of the transverse branch channel (3) away from the vertical main channel (2) is provided with a shrinkage block (4), the width of the shrinkage block (4) is greater than the width of the vertical main channel (2) and the transverse branch channel (3); the shrinkage block (4) is provided with a water inlet (401), and the water inlet (401) is connected to the inside of the product cavity (9); the cup mouth (101) of the pouring cup (1) faces upward, and the edge of the cup mouth (101) of the pouring cup (1) is provided with a flange structure (102) that is folded outward, so that the edge of the cup mouth (101) of the pouring cup (1) is smooth.

2. According to claim 1, a casting die head for investment casting, characterized in that: The flange structure (102) is first folded outwards and then folded downwards.

3. The investment casting die head according to claim 1, characterized in that: The top of the flange structure (102) is a circular ring-shaped plane (103).

4. The investment casting die head according to claim 1, characterized in that: The bottom of the flange structure (102) is a circular arc-shaped groove (104).

5. The investment casting die head according to any one of claims 1 to 4, characterized in that: The upper left side wall, the lower left side wall, the upper right side wall and the lower right side wall of the vertical main channel (2) are respectively connected to the transverse branch channel (3), and the front and rear ends of the feeding block (4) are respectively provided with the water inlets (401), and the water inlets (401) protrude outwards.

6. The investment casting die head according to claim 5, characterized in that: The pouring cup (1) is in the shape of a cone with a diameter that gradually increases from bottom to top. The front and rear side walls of the pouring cup (1) are respectively provided with filling blocks (5). The filling blocks (5) are tightly attached to the top of the adjacent water outlet (401) below. The vertical surface of the filling block (5) is parallel to the vertical surface of the water outlet (401). The vertical surface of the filling block (5) protrudes outward compared to the vertical surface of the water outlet (401).

7. The investment casting die head according to claim 5, characterized in that: The two feeding blocks (4) distributed up and down are fused together, and the front and rear ends between the two feeding blocks (4) distributed up and down are respectively provided with transverse surface channels (402), and the water inlets (401) are respectively provided above and below the transverse surface channels (402).

8. The investment casting die head according to claim 5, characterized in that: The two feeding blocks (4) distributed vertically and the two feeding blocks (4) distributed horizontally are distributed in a quadrilateral and form a group of feeding blocks (4), and the two groups of feeding blocks (4) are distributed vertically; a product cavity (9) is respectively provided at the front upper part, the front lower part, the rear upper part and the rear lower part of the vertical main channel (2), and the product cavity (9) is provided with four cavity legs (901), and the four cavity legs (901) of the product cavity (9) are respectively connected and matched with the water inlet (401) of a group of the feeding blocks (4) to realize the connection between the interior of the feeding block (4) and the interior of the product cavity (9).

9. The investment casting die head according to claim 5, characterized in that: A wax discharge pipe (10) is provided on the left and right sides of the pouring cup (1), respectively; the top end of the wax discharge pipe (10) is connected to the left side wall or the right side wall of the pouring cup (1), and the bottom end of the wax discharge pipe (10) is connected to the feeding block (4) on the upper left side wall or the upper right side wall, so that the interior of the pouring cup (1) is connected to the interior of the feeding block (4) through the wax discharge pipe (10).

10. The investment casting die head according to claim 6, characterized in that: The front and rear side walls of the pouring cup (1) are respectively provided with convex columns (6), and the convex columns (6) are located above the filling block (5) and below the flange structure (102). The ends of the left and right shrinkage blocks (4) away from the vertical main channel (2) are provided with cutting positioning columns (7), and the ends of the bottom shrinkage blocks (4) away from the pouring cup (1) are provided with shell vibration positioning columns (8).

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