CN114226643A - Method for solving shell expansion problem of lower cross arm part in production process - Google Patents
Method for solving shell expansion problem of lower cross arm part in production process Download PDFInfo
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- CN114226643A CN114226643A CN202111608996.0A CN202111608996A CN114226643A CN 114226643 A CN114226643 A CN 114226643A CN 202111608996 A CN202111608996 A CN 202111608996A CN 114226643 A CN114226643 A CN 114226643A
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- shell
- heating pipe
- heating
- wax
- dewaxing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
- B22C9/043—Removing the consumable pattern
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The heating pipe is embedded into the wax mold in advance, so that the wax mold can be heated from the inside of the shell, the dewaxing process of the shell is completed, the integral thermal expansion of the wax mold is avoided, and the heating pipe is directly embedded into the wax mold in the method, so that the integral strength of the wax mold is not influenced, and the problem of shell expansion is effectively prevented.
Description
Technical Field
The invention relates to the technical field of investment precision casting, in particular to a method for solving the problem of shell expansion in the production process of a lower cross arm part.
Background
It is known that, due to the rapid development of the manufacturing industry at present, the demand of the assembly parts is increasing, and the production and manufacture of the assembly parts generally adopt methods such as pressure casting, centrifugal casting, investment casting and the like, wherein in the investment casting, the produced wax pressing mold can be reused, the overall casting cost is low, and the overall structural integrity of the cast parts is high, so the assembly parts are generally produced by using the investment casting;
however, for some parts (such as a lower cross arm part) which are large in size and have a large plane structure, when the wax mold and the shell are placed into a smelting furnace for dewaxing, the wax mold expands due to rapid heating in the melting and stripping process because the temperature of the smelting furnace rises rapidly, so that bulging deformation occurs at the large plane structure of the shell, and finally the shell is scrapped; the traditional method for solving shell bulging corrects the shell after dewaxing, or reserves a certain expansion amount during wax pattern design, but both methods cause the produced shell to have larger error, influence the precision of produced accessory parts and reduce the product quality;
chinese patent (CN 201910184064.4) discloses a dewaxing method and a dewaxing device for ceramic shell mold, wherein a hollow cavity penetrating the center of a wax mold is arranged on the wax mold, and a heating body is placed in the hollow cavity, so as to realize a dewaxing manner from inside to outside, but for a lower cross arm component, the wax mold has a complex shape and a large planar structure with a large area and a small width, so when the method and the device are used for dewaxing the lower cross arm component, the heating body is close to the inner wall surface of the shell mold, so that the shell mold is heated too high and deformed, and the wax mold is heated unevenly, so that the problem of incomplete dewaxing is caused;
therefore, in view of the above, there is a need in the market for a dewaxing method for lower arm parts that prevents shell bulging.
Disclosure of Invention
To overcome the background art. The invention discloses a method for solving the shell expansion problem in the production process of a lower cross arm part.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for solving the shell expansion problem of a shell in the production process of a lower cross arm part comprises the following specific steps:
a. bending the heating pipe according to the shape of a cavity of the wax mold die, wherein the heating pipe is positioned in the center of the cavity, and the power-on end of the heating pipe is correspondingly positioned at a sprue of the wax mold;
b. melting wax, injecting into a mold, and pressing with a heating pipe to obtain a wax mold;
c. repeatedly carrying out slurry soaking and sand spraying operations on the wax mould, and drying to prepare a shell wrapping the outside of the wax mould;
d. placing the wax mould and the shell on a grabbing frame of a dewaxing seat, then connecting the two heating pipes with a power supply, and melting the wax mould through the temperatures of the heating pipes, wherein the heating temperature of the heating pipes is 300-480 ℃;
e. after the wax molds in the shell are melted and flow out, respectively drawing out the two heating pipes by utilizing an auxiliary device which can be matched and sleeved with the heating pipes to obtain a complete shell;
f. and (4) independently heating and shaping the shell.
Preferably, the heating pipe comprises heat-conducting layer, insulating layer and the core that generates heat, and the heat-conducting layer is established to the copper pipe, and the insulating layer is established to the mica tape material, and the core that generates heat is established to nickel-chromium heating wire, and is filled with the fibre carbon dust between insulating layer and the heat-conducting layer.
Preferably, the top surface of the dewaxing seat is provided with a grabbing frame and a flow guide groove for fixing the position of the shell, a power supply connected with the heating pipe is arranged in the dewaxing seat, a circular truncated cone-shaped flow guide plate is arranged between the power-on end of the heating pipe and the dewaxing seat, the flow guide plate can guide the wax liquid flowing out of the shell to the flow guide groove, and the flow guide groove guides the wax liquid to the corresponding collecting barrel.
Preferably, the grabbing frame comprises a frame body, a fixed arm and an inserting rod, the frame body is of a door frame structure, two vertical rods of the frame body are mounted on the top surface of the dewaxing seat, a sliding groove is formed in the side surface of a cross rod of the frame body, a plurality of sliding blocks are arranged in the sliding groove in a matched sliding mode, and each sliding block is provided with the fixed arm; the fixing arm is perpendicular to the cross rod correspondingly, an inserted bar capable of being inserted into the hollow-out position of the shell is arranged on the fixing arm in a sliding mode, and the inserted bar slides along the length direction of the fixing arm.
Preferably, the rod body of the inserted rod is provided with two limiting sliding tables, and the two limiting sliding tables can slide along the length direction of the inserted rod.
Preferably, the self temperature of the heating pipe in the step d can reach the heating temperature after 10-15 min.
Preferably, in the step e, the extraction process of the heating pipe is as follows:
firstly, sleeving the head end of an auxiliary device with a heating pipe;
secondly, extending the auxiliary device into the cavity until the head end of the auxiliary device is positioned at a first bending point of the heating pipe;
and III, then drawing out the heating pipe.
Preferably, the auxiliary device comprises a handle part and a pipe sleeve part, wherein the pipe sleeve part is in a trumpet shape, and the small diameter end of the pipe sleeve part is correspondingly towards the electrifying end of the heating pipe.
Preferably, in the step d, after the heating pipe is heated for 15-20min, the dewaxing seat is placed in the reaction kettle, and then secondary dewaxing is performed.
Preferably, a plurality of supports for supporting the heating pipe are adhered to the inner wall surface of the mold.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
the invention discloses a method for solving the shell expansion problem in the production process of a lower cross arm part, which is characterized in that a heating pipe is embedded in a wax mould, so that the wax mould can be heated from the inside of the shell, the dewaxing process of the shell is completed, the integral thermal expansion of the wax mould is avoided, and the heating pipe is directly embedded in the wax mould, so that the integral strength of the wax mould is not influenced, and the shell expansion problem is effectively prevented;
in addition, for the lower cross arm part with a complex inner shape, the pre-embedded heating pipe can fully and uniformly heat the whole wax mould in advance, so that the dewaxing process is smoothly completed.
Drawings
FIG. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic view of a heating tube and an auxiliary device;
fig. 3 is a schematic structural view of a heating tube.
In the figure: 1. heating a tube; 101. a heat conductive layer; 102. an insulating layer; 103. heating the core; 104. fiber carbon powder; 2. wax pattern; 3. molding a shell; 4. a dewaxing seat; 401. a diversion trench; 5. a grabbing frame; 501. a frame body; 502. a fixed arm; 503. inserting a rod; 504. a limiting sliding table; 6. an assist device; 7. a baffle; 8. and (4) a collecting barrel.
Detailed Description
In the following description, the technical solutions of the present invention will be described with reference to the drawings of the embodiments of the present invention, and it should be understood that, if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", etc., it is only corresponding to the drawings of the present invention, and for convenience of describing the present invention, it is not necessary to indicate or imply that the indicated devices or elements have a specific orientation:
the method for solving the shell expansion problem in the production process of the lower cross arm part, which is described by combining the attached drawings 1-3, comprises the following specific steps:
a. bending the heating pipe 1 according to the shape of a cavity of a wax mold 2, wherein the heating pipe 1 is positioned at the center of the cavity, and the power-on end of the heating pipe 1 is correspondingly positioned at a sprue of the wax mold 2;
namely, the heating pipe 1 is made of a malleable material, and the heating pipe 1 is bent into a waveform shape, so that the heating pipe 1 can uniformly heat the wax mold 2 on one hand, and the heating pipe 1 can be taken out more conveniently on the other hand; in addition, the electrifying end of the heating pipe 1 is used for being connected with a power supply, so the electrifying end is required to be connected with an external power supply, and the pouring gate of the wax mould 2 is a place where liquid wax flows out in the subsequent dewaxing process, so the electrifying end of the heating pipe 1 is arranged at the place, so that the subsequent dewaxing process can be conveniently and smoothly carried out;
b. melting the wax material, injecting the melted wax material into a mold, and pressing the melted wax material and the heating pipe 1 into a wax mold 2;
wherein the melting temperature of the wax material is 80-120 ℃, and the pressure of the mould is 0.2-0.8KPa in the pressing process of the wax mould 2;
c. repeatedly carrying out slurry soaking and sand spraying operations on the wax mould 2, and drying to prepare a shell 3 wrapping the outside of the wax mould 2;
wherein the slurry contains elements such as Si, Ca and the like, thereby effectively improving the heat resistance of the manufactured shell 3;
d. placing the wax mold 2 and the shell 3 on a grabbing frame 5 of a dewaxing seat 4, then connecting the two heating pipes 1 with a power supply, and melting the wax mold 2 through the temperature of the heating pipes 1, wherein the heating temperature of the heating pipes 1 is 300-480 ℃;
in addition, the shell 3 arranged on the grabbing frame 5 is in a suspended state, the space between the shell 3 and the dewaxing seat 4 is used for flowing down of molten wax, and when the power supply of the heating pipe 1 is connected with the power supply in the dewaxing seat 4, a branch pipe is arranged between the heating pipe 1 and the dewaxing seat 4 and used for keeping the position of the heating pipe 1 in the shell 3 and preventing the heating pipe 1 from falling off in the wax film melting process, and the heating pipe 1 can generate heat after being powered on, so that the wax body directly contacted with the heating pipe 1 can be melted firstly, and then the wax body far away from the heating pipe 1 can be melted along with the rise of the temperature of the heating pipe 1, the melted wax body can flow out from the sprue part of the shell 3 and then is collected by the dewaxing seat 4 and the collecting box;
e. after the wax molds 2 in the shell 3 are melted and flow out, respectively drawing out the two heating pipes 1 by utilizing an auxiliary device 6 which can be matched and sleeved with the heating pipes 1 to obtain a complete shell 3;
after dewaxing is finished, the width of the bent heating pipe 1 in the shell 3 is larger than the diameter of the sprue, and at the moment, only the sprue of the shell 3 can allow the heating pipe 1 to be drawn out, so that the auxiliary device 6 is sleeved on the pipe body of the heating pipe 1 and extends into the shell 3, wherein the sleeving position of the auxiliary device 6 and the heating pipe 1 is a fixed position, so that when the heating pipe 1 is drawn out, the pipe body of the heating pipe 1 passing through the auxiliary device 6 is restored to a straight pipe state, and the heating pipe 1 can be drawn out from the sprue;
f. and (3) independently heating and shaping the shell 3 to finally prepare the mould shell for metal casting.
Preferably, the heating pipe 1 is composed of a heat conduction layer 101, an insulation layer 102 and a heating core, the heat conduction layer 101 is a copper pipe, the insulation layer 102 is a mica tape material, the heating core is a nickel-chromium heating wire, and a fiber carbon powder 104 is filled between the insulation layer 102 and the heat conduction layer 101, wherein the heat conduction of the copper pipe can make the heating core dissipate heat outwards with less loss, and the copper pipe has stronger ductility, so as to facilitate bending and recovery of the heating pipe 1, the insulation layer 102 is used for preventing the current passing through the heating core from being in contact with air to generate breakdown or spark, so as to improve the safety of the heating pipe 1, the mica tape material also has stronger ductility, the nickel-chromium heating wire has stronger heating capacity, the fiber carbon powder 104 is used for ensuring that the heating core 103 is located at the center of the heating pipe 1 on one hand, and on the other hand, because of the good heat conduction of the fiber carbon powder itself, the loss caused when the heating core radiates heat to the outside can be reduced.
Preferably, the top surface of the dewaxing seat 4 is provided with a grabbing frame 5 and a flow guide groove 401 for fixing the position of the shell 3, a power supply connected with the heating pipe 1 is arranged in the dewaxing seat 4, a circular truncated cone-shaped flow guide plate 7 is arranged between the power-on end of the heating pipe 1 and the dewaxing seat 4, the flow guide plate 7 can guide the wax liquid flowing out of the shell 3 into the flow guide groove 401, and the flow guide groove 401 guides the wax liquid into the corresponding collecting barrel 8; the flow guide plate 7 can guide the wax liquid to flow into the flow guide groove 401, so as to prevent the wax liquid from flowing into the power supply of the dewaxing seat 4 along the surface of the heating pipe 1 and the branch pipe, and can provide supporting force for the heating pipe 1 to keep the position of the heating pipe 1 in the shell 3.
Preferably, the grabbing frame 5 comprises a frame body 501, a fixed arm 502 and an inserting rod 503, the frame body 501 is of a door frame structure, two vertical rods of the frame body 501 are mounted on the top surface of the dewaxing seat 4, a sliding groove is formed in the side surface of a cross rod of the frame body 501, a plurality of sliding blocks are arranged in the sliding groove in a matched sliding mode, and each sliding block is provided with the fixed arm 502; the fixing arm 502 is perpendicular to the cross bar correspondingly, the inserting rod 503 capable of being inserted into the hollow part of the shell 3 is arranged on the fixing arm 502 in a sliding mode, the inserting rod 503 slides along the length direction of the fixing arm 502, the shell 3 can be supported through the inserting rod 503, so that the shell 3 can be grabbed, the shell 3 is kept in a suspended state, and the fixing arm 502 and the inserting rod 503 move to be used for finding the corresponding position of the hollow part of the shell 3;
in addition, because the two ends of the mold shell 3 may have a portion lower than the horizontal plane of the gate, in the dewaxing process, the insert rods 503 at the two ends of the grabbing frame 5 are moved in a matching manner to drive the mold shell 3 to incline, so that the wax liquid at the two ends of the mold shell 3 can flow to the gate, and the dewaxing operation is completed.
Preferably, the rod body of the inserted rod 503 is provided with two limiting sliding tables 504, the two limiting sliding tables 504 can slide along the length direction of the inserted rod 503, the shell 3 can be further clamped through the limiting sliding tables 504, and the clamping performance of the grabbing frame 5 on the shell 3 is improved.
Preferably, the temperature of the heating pipe 1 in the step d can reach the heating temperature after 10-15min, and the heating pipe 1 adopts a slow heating mode, so that the melting speed of each part of the wax mold 2 is more uniform, and the phenomenon that the wax mold 2 is rapidly heated to expand is avoided.
Preferably, in the step e, the extraction process of the heating pipe 1 is as follows:
firstly, sleeving the head end of an auxiliary device 6 with a heating pipe 1;
secondly, extending the auxiliary device 6 into the cavity until the head end of the auxiliary device 6 is positioned at a first bending point of the heating pipe 1;
III, then drawing out the heating pipe 1;
the head end of the auxiliary device 6 is set as a pipe sleeve, the rest part of the auxiliary device 6 is a long handle rod, the pipe sleeve at the head end of the auxiliary device 6 is sleeved on the heating pipe 1 and is fixedly positioned in the cavity, so that when the heating pipe 1 is extracted outwards, the bent section of the heating pipe 1 inevitably passes through the pipe sleeve of the auxiliary device 6, the bent part of the heating pipe 1 is corrected by the pipe sleeve, the heating pipe 1 is kept straight in the extraction process, and the heating pipe 1 can be ensured to be smoothly taken out of the shell 3; in addition, when the length of the heating pipe 1 in the shell 3 is longer, auxiliary tongs can be added, and the pipe body of the heating pipe 1 in the depth of the shell 3 is clamped by the auxiliary tongs, so that the heating pipe 1 at the gate can be taken out smoothly.
Preferably, the assistor 6 comprises a handle part and a pipe sleeve part, wherein the pipe sleeve part is flared, the small diameter end of the pipe sleeve part faces the power-on end of the heating pipe 1 correspondingly, the flared pipe sleeve part can correct the heating pipe 1 more conveniently, and the pipe wall of the heating pipe 1 can be prevented from being scratched by the pipe orifice of the pipe sleeve in the correction process.
Preferably, when the shell is dewaxed by the traditional smelting furnace, the wax pattern is directly evaporated and cannot be collected due to the high temperature in the smelting furnace, and in the step d of the method, the wax pattern is fully dewaxed by placing the dewaxing seat into the reaction kettle after the heating pipe is heated for 15-20min, and then dewaxing is performed for the second time, and the separated wax liquid can be recycled, so that the reutilization rate of wax therapy is improved.
Preferably, a plurality of supports for supporting the heating pipe are adhered to the inner wall surface of the mold, the supports can ensure that the heating pipe is located at the center of the wax mold, and when the wax mold is pressed and taken out, the supports can be separated from the mold along with the wax mold, and in the subsequent dewaxing process, after the wax mold near the supports is melted, the supports can fall out of the shell, and can be recycled.
The invention is not described in detail in the prior art, and it is apparent to a person skilled in the art that the invention is not limited to details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
Claims (10)
1. A method for solving the shell expansion problem of a shell in the production process of a lower cross arm part is characterized by comprising the following steps: the method comprises the following specific steps:
a. bending the heating pipe (1) according to the shape of a cavity of the wax mold (2), wherein the heating pipe (1) is positioned at the center of the cavity, and the power-on end of the heating pipe (1) is correspondingly positioned at the sprue of the wax mold (2);
b. melting the wax material, injecting the melted wax material into a mold, and pressing the melted wax material and the heating pipe (1) together to form a wax mold (2);
c. repeatedly carrying out slurry soaking and sand spraying operations on the wax mould (2), and drying to prepare a shell (3) coated outside the wax mould (2);
d. placing the wax mold (2) and the shell (3) on a grabbing frame (5) of a dewaxing seat (4), then connecting the two heating pipes (1) with a power supply, and melting the wax mold (2) through the temperature of the heating pipes (1), wherein the heating temperature of the heating pipes (1) is 300-;
e. after the wax molds (2) in the shell (3) are melted and flow out, respectively drawing out the two heating pipes (1) by utilizing an auxiliary device (6) which can be matched and sleeved with the heating pipes (1) to obtain a complete shell (3);
f. and (3) independently heating and shaping the shell (3).
2. The method for solving the shell expansion problem in the production process of the lower cross arm part as claimed in claim 1, wherein the method comprises the following steps: the heating pipe (1) is composed of a heat conduction layer (101), an insulation layer (102) and a heating core, wherein the heat conduction layer (101) is made of a copper pipe, the insulation layer (102) is made of a mica tape material, the heating core is made of a nickel-chromium heating wire, and fiber carbon powder (104) is filled between the insulation layer (102) and the heat conduction layer (101).
3. The method for solving the shell expansion problem in the production process of the lower cross arm part as claimed in claim 1, wherein the method comprises the following steps: the top face of dewaxing seat (4) is equipped with the frame (5) and guiding gutter (401) of snatching that are used for fixed shell (3) position, be equipped with the power of being connected with heating pipe (1) in dewaxing seat (4), and be equipped with guide plate (7) of round platform form between heating pipe (1) circular telegram end and dewaxing seat (4), guide plate (7) can guide the wax liquid of flowing in shell (3) to guiding gutter (401), and guiding gutter (401) guide the wax liquid to in corresponding collecting vessel (8) again.
4. A method for solving the problem of shell expansion in the production process of a lower cross arm part as claimed in claim 3, wherein: the grabbing frame (5) comprises a frame body (501), a fixed arm (502) and an inserting rod (503), the frame body (501) is of a door frame structure, two vertical rods of the frame body (501) are installed on the top surface of the dewaxing seat (4), a sliding groove is formed in the side surface of a cross rod of the frame body (501), a plurality of sliding blocks are arranged in the sliding groove in a matched and sliding mode, and each sliding block is provided with the fixed arm (502); the fixing arm (502) is perpendicular to the cross rod correspondingly, an inserting rod (503) capable of being inserted into the hollow-out position of the shell (3) is arranged on the fixing arm (502) in a sliding mode, and the inserting rod (503) slides along the length direction of the fixing arm (502).
5. The method for solving the shell expansion problem in the production process of the lower cross arm part as claimed in claim 4, wherein the method comprises the following steps: the rod body of the inserted rod (503) is provided with two limiting sliding tables (504), and the two limiting sliding tables (504) can slide along the length direction of the inserted rod (503).
6. The method for solving the shell expansion problem in the production process of the lower cross arm part as claimed in claim 1, wherein the method comprises the following steps: in the step d, the self temperature of the heating pipe (1) can reach the heating temperature after 10-15 min.
7. The method for solving the shell expansion problem in the production process of the lower cross arm part as claimed in claim 1, wherein the method comprises the following steps: in the step e, the extraction process of the heating pipe (1) is as follows:
firstly, sleeving the head end of an auxiliary device (6) with a heating pipe (1);
secondly, extending the auxiliary device (6) into the cavity until the head end of the auxiliary device (6) is positioned at a first bending point of the heating pipe (1);
III, then drawing out the heating pipe (1).
8. The method for solving the shell expansion problem in the production process of the lower cross arm part as claimed in claim 7, wherein the method comprises the following steps: the auxiliary device (6) comprises a handle part and a pipe sleeve part, wherein the pipe sleeve part is in a horn shape, and the small-diameter end of the pipe sleeve part correspondingly faces to the electrifying end of the heating pipe (1).
9. The method for solving the shell expansion problem in the production process of the lower cross arm part as claimed in claim 1, wherein the method comprises the following steps: in the step d, after the heating pipe (1) is heated for 15-20min, the dewaxing seat (501) is placed into the reaction kettle, and then secondary dewaxing is carried out.
10. The method for solving the shell expansion problem in the production process of the lower cross arm part as claimed in claim 1, wherein the method comprises the following steps: and a plurality of supports for supporting the heating pipe are adhered to the inner wall surface of the mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111608996.0A CN114226643B (en) | 2021-12-27 | 2021-12-27 | Dewaxing method for preventing middle-sized shell from expanding during production process of lower cross arm part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111608996.0A CN114226643B (en) | 2021-12-27 | 2021-12-27 | Dewaxing method for preventing middle-sized shell from expanding during production process of lower cross arm part |
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| CN114226643A true CN114226643A (en) | 2022-03-25 |
| CN114226643B CN114226643B (en) | 2023-05-12 |
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| CN202111608996.0A Active CN114226643B (en) | 2021-12-27 | 2021-12-27 | Dewaxing method for preventing middle-sized shell from expanding during production process of lower cross arm part |
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| GB995722A (en) * | 1964-04-17 | 1965-06-23 | Rolls Royce | Improvements relating to the removal of an electrically conductive member from non-conductive material |
| JPS60223640A (en) * | 1984-04-23 | 1985-11-08 | Toyota Motor Corp | Production of pipe bend |
| CN1607052A (en) * | 2003-10-15 | 2005-04-20 | 联合工艺公司 | Refractory metal core |
| CN101362186A (en) * | 2007-03-01 | 2009-02-11 | 金属铸造技术公司 | Method and apparatus for removing a fugitive pattern from a mold |
| CN102764853A (en) * | 2012-08-10 | 2012-11-07 | 邯郸慧桥复合材料科技有限公司 | Process for induction heating gasification expanded polystyrene (EPS) evaporative pattern casting |
| CN103418743A (en) * | 2013-06-07 | 2013-12-04 | 南通超达机械科技有限公司 | Positioning device for adaptor of water heating pipe for inlet and outlet of PU foam and machining technology thereof |
| CN105979615A (en) * | 2016-05-16 | 2016-09-28 | 山东法斯特建材股份有限公司 | Heating pipe |
-
2021
- 2021-12-27 CN CN202111608996.0A patent/CN114226643B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB995722A (en) * | 1964-04-17 | 1965-06-23 | Rolls Royce | Improvements relating to the removal of an electrically conductive member from non-conductive material |
| JPS60223640A (en) * | 1984-04-23 | 1985-11-08 | Toyota Motor Corp | Production of pipe bend |
| CN1607052A (en) * | 2003-10-15 | 2005-04-20 | 联合工艺公司 | Refractory metal core |
| CN101362186A (en) * | 2007-03-01 | 2009-02-11 | 金属铸造技术公司 | Method and apparatus for removing a fugitive pattern from a mold |
| CN102764853A (en) * | 2012-08-10 | 2012-11-07 | 邯郸慧桥复合材料科技有限公司 | Process for induction heating gasification expanded polystyrene (EPS) evaporative pattern casting |
| CN103418743A (en) * | 2013-06-07 | 2013-12-04 | 南通超达机械科技有限公司 | Positioning device for adaptor of water heating pipe for inlet and outlet of PU foam and machining technology thereof |
| CN105979615A (en) * | 2016-05-16 | 2016-09-28 | 山东法斯特建材股份有限公司 | Heating pipe |
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| Publication number | Publication date |
|---|---|
| CN114226643B (en) | 2023-05-12 |
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Address after: 471000 No. 3, Yingzhou Science Park, high tech Zone, Luoyang City, Henan Province Applicant after: Luoyang Kepin Titanium Industry Co.,Ltd. Address before: 471000 No. 3, Yingzhou Science Park, high tech Zone, Luoyang City, Henan Province Applicant before: Luoyang Kepin Titanium Industry Co.,Ltd. Address after: 471000 No. 3, Yingzhou Science Park, high tech Zone, Luoyang City, Henan Province Applicant after: Luoyang Kepin Titanium Industry Co.,Ltd. Address before: 471000 No.3, Yingzhou science and Technology Park, dongshapo, sunqitun, high tech Zone, Luoyang City, Henan Province Applicant before: Luoyang KEPIN Industrial Co.,Ltd. |
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