CN113579164B - Wedge-shaped gate rod and investment casting method - Google Patents
Wedge-shaped gate rod and investment casting method Download PDFInfo
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- CN113579164B CN113579164B CN202110597319.7A CN202110597319A CN113579164B CN 113579164 B CN113579164 B CN 113579164B CN 202110597319 A CN202110597319 A CN 202110597319A CN 113579164 B CN113579164 B CN 113579164B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/082—Sprues, pouring cups
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
According to the wedge-shaped pouring gate rod and the investment casting method, the wedge-shaped faces which are inclined downwards outwards are respectively arranged on the two outer side faces of the transverse pouring gate main body, and compared with the existing design scheme that the included angle between the pouring gate rod and the end face of the inner pouring gate of a workpiece is a right angle, on one hand, stress at the joint of the inner pouring gate and the pouring gate rod is concentrated, a pouring head is conveniently hammered off, knocking on a casting workpiece is not needed, and the workpiece is prevented from being damaged; in the second aspect, the design of the wedge-shaped surface can increase the filling pressure of the liquid metal to the workpiece to be cast in the casting process, so that the feeding is facilitated, and the shrinkage cavity risk is reduced; the wedge-shaped pouring gate rod is integrally conical in design, is convenient for falling off a pouring head, and is particularly suitable for investment casting of a differential pressure sensor base.
Description
Technical Field
The invention relates to the field of gate bars, in particular to a wedge-shaped gate bar and an investment casting method.
Background
In the technical field of precision casting, a workpiece is required to be used as a gate rod in investment casting production, liquid metal is poured through the gate rod, the liquid metal flows into a workpiece inner runner, and after solidification molding, the gate rod and the workpiece are separated.
In the process, the removal of the casting head of the casting is a working procedure with high labor intensity and extremely low mechanization degree due to the limitation of objective conditions such as diversified workpiece structures, materials and assembly modes. The most economical, practical and efficient method for removing the casting head of the workpiece is a hammering method at present.
The conventional gate rod is a straight gate rod, the included angle between the gate rod and the end face of the gate in the workpiece is a right angle, and after solidification molding, the gate rod is unfavorable for hammering and falling off, and liquid metal horizontally enters the workpiece to cause insufficient filling pressure.
Disclosure of Invention
In view of the above, the invention provides a wedge-shaped gate rod and an investment casting method, which are convenient for hammering and falling off, and can effectively solve the problems of insufficient filling pressure and poor feeding of workpieces.
The technical scheme of the invention is realized as follows:
on one hand, the invention provides a wedge-shaped pouring gate rod, which comprises a pouring cup (1) and also comprises a transverse pouring gate main body (2), wherein the transverse pouring gate main body (2) is fixedly arranged below the pouring cup (1) and is mutually communicated to form a pouring gate (12), two outer side surfaces of the transverse pouring gate main body (2) respectively comprise wedge-shaped surfaces (21) inclined downwards outwards, two outer side surfaces of the transverse pouring gate main body (2) are respectively provided with an outer pouring gate (20), the outer pouring gate (20) is communicated with a pouring head (S1) of a workpiece (S) to be poured, and the wedge-shaped surfaces (21) of the transverse pouring gate main body (2) are mutually attached to the end surfaces of the pouring head (S1) of the workpiece (S) to be poured.
On the basis of the technical scheme, preferably, the included angle between the wedge-shaped surface (21) and the central longitudinal section of the transverse runner main body (2) is an acute angle.
Further preferably, an included angle between the wedge-shaped surface (21) and a central longitudinal section of the runner main body (2) is a, and a=10-45 degrees.
On the basis of the technical scheme, preferably, two sprue main bodies (2) are arranged, are symmetrically arranged front and back and are communicated with each other, and the sprue cup (1) is communicated with the communicating positions of the two sprue main bodies (2); the workpieces (S) to be cast are four, and are communicated with two external pouring gates (20) of the runner main body (2) in pairs.
Further preferably, the pouring cup further comprises two reinforcing ribs (3), two ends of the two reinforcing ribs (3) are respectively communicated with the side face of the pouring cup (1) and the top face of the transverse pouring channel main body (2), the central shaft of the reinforcing ribs (3) and the central shaft of the pouring cup (1) are arranged at an acute angle, and the two reinforcing ribs (3) are symmetrically arranged relative to the central shaft of the pouring cup (1) in a left-right mode.
Further preferably, the periphery of the pouring cup (1) is provided with a thread reinforcing rib (11).
In a second aspect, the present invention provides a wedge-shaped gate bar and investment casting method, comprising the steps of,
s1, mutually attaching and bonding the wedge-shaped surface (21) and the end face of a casting head (S1) of a workpiece (S) to be cast, and connecting an external gate (20) with the casting head (S1) of the workpiece (S) to be cast;
s2, pouring liquid metal into the pouring cup (1), enabling the liquid metal to flow into a workpiece (S) to be poured through the pouring gate (12) and the pouring head (S1) in sequence, and cooling until the liquid metal is solidified;
s3, placing the wedge-shaped pouring gate rod and the workpiece (S) to be poured which are connected together in a solidification mode on a horizontal plane on which fine sand is evenly paved, knocking the top of the pouring cup (1) from top to bottom, and enabling the wedge-shaped surface (21) and the end face of the pouring head (S1) to be separated from each other.
Further preferably, the workpiece (S) to be cast is a differential pressure sensor base.
Still more preferably, the bottom of the differential pressure sensor base is horizontally arranged with one surface facing downwards.
Further preferably, the grain size of the fine sand is 0.1 to 2mm.
Compared with the prior art, the wedge-shaped gate rod and the investment casting method have the following beneficial effects:
by arranging the wedge-shaped faces inclined downwards outwards on the two outer side faces of the runner main body respectively, the included angle between the existing runner bar and the end face of the inner runner of the workpiece is a right-angle design scheme, on one hand, stress at the joint of the inner runner and the runner bar is concentrated, the runner is convenient to hammer, the runner cup is convenient to fall off, the runner is not required to be knocked on a casting workpiece, and the workpiece is prevented from being damaged; in the second aspect, the design of the wedge-shaped surface can increase the filling pressure of the liquid metal to the workpiece to be cast in the casting process, so that the feeding is facilitated, and the shrinkage cavity risk is reduced;
the workpieces to be cast are symmetrically arranged at two sides of the transverse pouring gate main body, casting is more uniform, and in a falling off casting head link, the symmetrically arranged casting workpieces respectively move to two sides, so that the transverse pouring gate main body and the casting workpieces can be separated quickly;
the reinforcing ribs are arranged, so that the integral strength of the wedge-shaped gate rod is improved, and the exhaust effect can be achieved in the solidification link;
the wedge-shaped pouring gate rod and the workpiece to be cast which are connected together through solidification are placed on the horizontal plane on which fine sand is uniformly paved, so that the casting workpiece on the left side and the casting workpiece on the right side can slide relatively, and the casting workpiece can be conveniently dropped off, and meanwhile, the damage to the casting workpiece can be reduced;
the wedge-shaped pouring gate rod is integrally conical in design, is convenient for falling off a pouring head, and is particularly suitable for investment casting of a differential pressure sensor base.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a perspective view of a wedge-shaped gate rod of the present invention assembled with a workpiece to be cast;
FIG. 2 is an elevation view of the wedge-shaped gate rod of the present invention after assembly of a workpiece to be cast;
FIG. 3 is a top view of the wedge-shaped gate stick of the present invention with a workpiece to be cast assembled;
FIG. 4 is a cross-sectional view taken along the direction of FIG. 3 A-A;
fig. 5 is a perspective view of the two workpieces to be cast from fig. 1, with one side removed, after assembly.
Description of the embodiments
The following description of the embodiments of the present invention will clearly and fully describe the technical aspects of the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, are intended to fall within the scope of the present invention.
As shown in fig. 1 to 5, the wedge-shaped gate rod of the present invention includes a pouring cup 1, a runner main body 2 and a reinforcing rib 3.
The surface of the workpiece S to be cast is provided with a casting head S1 which is used for being communicated with the transverse pouring gate main body 2 to be filled with liquid metal, and the casting head S1 is cut off after the forming is finished.
The pouring cup 1 is used for pouring liquid metal on the one hand, and on the other hand, is subjected to hammering force and is conducted to the pouring channel body 2. The pouring cup 1 is generally of a bucket-shaped design, liquid metal is conveniently poured, and in order to improve the overall stress intensity of the pouring cup, a threaded reinforcing rib 11 is arranged on the periphery of the pouring cup.
The horizontal pouring channel main body 2 is fixedly arranged below the pouring cup 1, and the horizontal pouring channel main body and the pouring channel main body are mutually communicated to form a pouring channel 12, so that the direction of the liquid metal in the vertical flow direction is changed into the horizontal flow direction. In the prior art, the outer side face of the transverse pouring gate main body 2 is vertically arranged and is mutually attached to the end face of the casting head S1, so that the falling casting head S1 is very difficult, and the problems of insufficient filling pressure and poor feeding of a workpiece are easily caused. The two outer side surfaces of the cross gate main body 2 of the invention respectively comprise wedge-shaped surfaces 21 which incline downwards outwards, the two outer side surfaces of the cross gate main body 2 are respectively provided with an outer gate 20, the outer gate 20 is used for communicating with a casting head S1 of a workpiece S to be cast, and the wedge-shaped surfaces 21 of the cross gate main body 2 are used for mutually attaching with the end surface of the casting head S1 of the workpiece S to be cast.
As a preferred embodiment, the wedge-shaped surface 21 forms an acute angle with the longitudinal section of the centre of the runner body 2. More preferably, the included angle between the wedge-shaped surface 21 and the central longitudinal section of the runner main body 2 is a, a=10 to 45 °. In the drawings of the present invention, the wedge-shaped face 21 is at an angle of 20 ° to the central longitudinal plane of the runner body 2.
In order to improve the molding efficiency and the stability of the wedge-shaped pouring gate rod and the workpiece S to be molded on the horizontal plane after being molded, two transverse pouring gate bodies 2 are arranged, are symmetrically arranged front and back and are communicated with each other, and the pouring cup 1 is communicated with the communicating positions of the two transverse pouring gate bodies 2; the number of the workpieces S to be cast is four, and the workpieces S to be cast are communicated with two external pouring gates 20 of the cross runner main body 2.
In order to improve the connection stability of the pouring cup 1 and the runner main body 2, as a preferred embodiment, the invention is provided with two reinforcing ribs 3, two ends of the two reinforcing ribs 3 are respectively communicated with the side surface of the pouring cup 1 and the top surface of the runner main body 2, the central axis of the reinforcing rib 3 and the central axis of the pouring cup 1 are arranged at an acute angle, and the two reinforcing ribs 3 are symmetrically arranged relative to the central axis of the pouring cup 1. The reinforcing ribs 3 are arranged, so that the integral strength of the wedge-shaped gate rod is improved, and the effect of exhausting can be achieved in the solidification link.
The wedge gate stick and investment casting method of the present invention are described below, including the steps of:
s1, attaching and bonding the wedge-shaped surface 21 and the end face of a casting head S1 of a workpiece S to be cast, and communicating an external gate 20 with the casting head S1 of the workpiece S to be cast; specifically, the workpiece S to be cast is a differential pressure sensor base, and one horizontal surface of the bottom of the differential pressure sensor base faces downwards and is horizontally arranged;
s2, pouring liquid metal into the pouring cup 1, enabling the liquid metal to flow into a workpiece S to be poured through the pouring gate 12 and the pouring head S1 in sequence, and cooling until the liquid metal is solidified;
s3, placing the wedge-shaped pouring gate rod and the workpiece S to be poured which are connected together in a solidification mode on a horizontal plane on which fine sand is evenly paved, and knocking the top of the pouring cup 1 from top to bottom to enable the wedge-shaped surface 21 and the end face of the pouring head S1 to be separated from each other. Specifically, the grain size of the fine sand is 0.1-2 mm, in the process of knocking the top of the pouring cup 1 from top to bottom, the wedge-shaped pouring gate rod is nailed between two sets of pouring heads S1 which are oppositely arranged like a nail, and two sets of differential pressure sensor bases which are oppositely arranged roll along the fine sand and are separated from the wedge-shaped pouring gate rod.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (9)
1. Wedge runner stick casting structure, it includes pouring basin (1), its characterized in that: still include runner main part (2), runner main part (2) are fixed to be set up in pouring cup (1) below, and both intercommunication forms runner (12), two lateral surfaces of runner main part (2) include respectively wedge face (21) of slope to the below inwards, outer runner (20) have been seted up respectively on two lateral surfaces of runner main part (2), outer runner (20) are linked together with runner (S1) of waiting to cast work piece (S), and wedge face (21) of runner main part (2) are laminated each other with runner (S1) terminal surface of waiting to cast work piece (S), the contained angle of wedge face (21) and runner main part (2) central longitudinal section is an acute angle.
2. The wedge-shaped gate rod casting structure according to claim 1, wherein: the included angle between the wedge-shaped surface (21) and the central longitudinal section of the transverse pouring channel main body (2) is a, and a=10-45 degrees.
3. The wedge-shaped gate rod casting structure according to claim 1, wherein: the two sprue main bodies (2) are symmetrically arranged left and right and are communicated with each other, and the sprue cup (1) is communicated with the communicating positions of the two sprue main bodies (2); the workpieces (S) to be cast are four, and are communicated with two external pouring gates (20) of the runner main body (2) in pairs.
4. The wedge-shaped gate rod casting structure of claim 3, wherein: still include two strengthening ribs (3), two strengthening rib (3) both ends respectively with pouring basin (1) side and runner main part (2) top surface intercommunication, strengthening rib (3) center pin is an acute angle setting with pouring basin (1) center pin, two strengthening ribs (3) set up for pouring basin (1) center pin bilateral symmetry.
5. The wedge-shaped gate rod casting structure of claim 4, wherein: screw thread reinforcing ribs (11) are arranged on the periphery of the pouring cup (1).
6. An investment casting method, characterized in that: the wedge-shaped pouring gate rod casting structure according to claim 1, comprising the following steps,
s1, mutually attaching and bonding the wedge-shaped surface (21) and the end face of a casting head (S1) of a workpiece (S) to be cast, and connecting an external gate (20) with the casting head (S1) of the workpiece (S) to be cast;
s2, pouring liquid metal into the pouring cup (1), enabling the liquid metal to flow into a workpiece (S) to be poured through the pouring gate (12) and the pouring head (S1) in sequence, and cooling until the liquid metal is solidified;
s3, placing the wedge-shaped pouring gate rod and the workpiece (S) to be poured which are connected together in a solidification mode on a horizontal plane on which fine sand is evenly paved, knocking the top of the pouring cup (1) from top to bottom, and enabling the wedge-shaped surface (21) and the end face of the pouring head (S1) to be separated from each other.
7. The investment casting method of claim 6, wherein: the workpiece (S) to be cast is a differential pressure sensor base.
8. The investment casting method of claim 7, wherein: the horizontal face of differential pressure sensor base bottom is down, and the level sets up.
9. The investment casting method of claim 6, wherein: the grain size of the fine sand is 0.1-2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110597319.7A CN113579164B (en) | 2021-05-31 | 2021-05-31 | Wedge-shaped gate rod and investment casting method |
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| CN202110597319.7A CN113579164B (en) | 2021-05-31 | 2021-05-31 | Wedge-shaped gate rod and investment casting method |
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| CN113579164B true CN113579164B (en) | 2023-06-16 |
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| CN114749601A (en) * | 2022-05-07 | 2022-07-15 | 东风(十堰)有色铸件有限公司 | Multifunctional sprue cup and processing method thereof |
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| JPH055263U (en) * | 1991-07-02 | 1993-01-26 | ダイハツ工業株式会社 | Cast weir folding device |
| CN100337775C (en) * | 2004-10-29 | 2007-09-19 | 中国科学院金属研究所 | Method for producing large-sized blank of wrought magnesium alloys |
| KR20150087866A (en) * | 2014-01-22 | 2015-07-31 | 순천대학교 산학협력단 | A Disk Mold for casting Co-Cr-Mo alloy |
| CN203737927U (en) * | 2014-03-26 | 2014-07-30 | 重庆江增机械有限公司 | Turbine blade investment casting wax pattern assembled welding structure |
| CN204565056U (en) * | 2015-04-29 | 2015-08-19 | 宁波通达精密铸造有限公司 | Novel casting running gate system |
| CN205147229U (en) * | 2015-11-28 | 2016-04-13 | 西峡县西泵特种铸造有限公司 | Casting is with hindering sediment pouring device |
| CN205324642U (en) * | 2015-11-30 | 2016-06-22 | 保定风帆精密铸造制品有限公司 | A the gating system for high -speed railway insulator gold utensil precision casting |
| CN205650771U (en) * | 2016-05-19 | 2016-10-19 | 浙江港航重工机械有限公司 | Runner system collection sediment device |
| CN106734879B (en) * | 2016-12-12 | 2018-12-04 | 重庆理工大学 | A kind of lost foam casting moulding process of waste incineration reciprocating grate bar |
| CN110918894A (en) * | 2019-12-06 | 2020-03-27 | 东风精密铸造有限公司 | Gate bar |
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