CN111266527B - Drying method for lost foam pattern - Google Patents
Drying method for lost foam pattern Download PDFInfo
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- CN111266527B CN111266527B CN202010335759.0A CN202010335759A CN111266527B CN 111266527 B CN111266527 B CN 111266527B CN 202010335759 A CN202010335759 A CN 202010335759A CN 111266527 B CN111266527 B CN 111266527B
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- pattern
- rod
- support
- rack
- support rod
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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
- B22C7/023—Patterns made from expanded plastic materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C23/00—Tools; Devices not mentioned before for moulding
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drying Of Solid Materials (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention relates to a lost foam pattern drying method, which comprises the steps of enabling the heights of a plurality of support rods to be matched with pattern supports with different shapes; adjusting the distance between the adjacent support rods to enable the support rods to effectively support the patterns with different lengths and sizes; rotating the toggle mechanism to enable the support rod to be positioned on the rack to synchronously rotate and enable the unused new film to be positioned on the support rod in a rotating mode so as to realize the support of the pattern; placing the pattern coated with the coating on a support rod, and pushing the pattern into a drying room to realize the drying operation of the pattern on the support rod; after the pattern is dried, the pattern is taken down from the support rod, the method can effectively solve the problem that the pattern surface coating is dry and incomplete due to the fact that the pattern is directly contacted with the support rod, and the surface of the pattern is smooth, so that the surface quality of a subsequent cast finished product is ensured.
Description
Technical Field
The invention relates to the technical field of casting, in particular to a drying method for a lost foam pattern.
Background
In the conventional production method of sand casting as a general structural component, the used pattern is generally a high molecular material, for example, after polystyrene foam is produced through a mold, a high-temperature resistant coating needs to be coated on the surface of the pattern, and then the pattern is dried, so that a qualified pattern can be produced, and the quality of a casting in the subsequent actual casting is ensured. When carrying out the mould production, utilize the flush coater to need carry out omnidirectional spraying operation to single or a certain amount of mould, and the spraying finishes the back, place respectively on the frame of drying, then carry out quick stoving operation, the mould after the spraying finishes is put and is dried the operation after drying the frame, can obtain the mould product, so that subsequent casting uses, the good mould of above-mentioned spraying still has comparatively serious to drench and hangs the phenomenon, directly put back on the frame of drying, because coating places the back on the frame of drying, coating drops on the frame of drying, when the mould takes out from the frame of drying, dry coating very easily ties on the frame of drying, cause the comparatively serious coating in mould surface to lose the problem, cause great influence to subsequent casting finished product quality.
Disclosure of Invention
The invention aims to provide a drying method of a lost foam pattern, which can effectively solve the problem of loss of surface-dried coating generated when the pattern is positioned on a drying rack and taken down, and ensure the quality of later-stage castings.
The technical scheme adopted by the invention is as follows.
The drying method of the lost foam pattern comprises the following steps:
firstly, adjusting an adjusting mechanism to enable the heights of a plurality of support rods to be matched with the supports of patterns with different shapes;
secondly, adjusting the distance between adjacent support rods to enable the support rods to effectively support the patterns with different lengths and sizes;
thirdly, rotating the toggle mechanism to enable the support rod to be positioned on the rack to synchronously rotate, and enabling the unused new film to be rotatably arranged on the support rod to realize the support of the pattern;
fourthly, placing the pattern coated with the coating on a support rod and pushing the pattern to a drying room so as to realize the drying operation of the pattern on the support rod;
and fifthly, after the pattern is dried, taking down the pattern from the supporting rod, and rotating the toggle mechanism to enable the unused new film to be rotatably arranged on the supporting rod so as to realize the support of the pattern to be dried.
The invention also has the following features:
the two ends of the support rods are respectively arranged on the rack, the positions of the support rods in the vertical direction of the rack are adjustable, and the distance between every two adjacent support rods is adjustable.
The membrane is the sleeve pipe form and overlaps and establish on the die-pin, be provided with the weight lever in the lumen of membrane, weight lever and die-pin length direction parallel arrangement, the weight lever is kept away from with the die-pin and is arranged and implement the tensioning to the membrane.
The diameter of the support rod is larger than the rod diameter of the counterweight rod, and the poking mechanism pokes the support rod to be in an interval rotating state.
And an elastic supporting unit is arranged between the counterweight rod and the support rod and is used for realizing elastic tensioning between the counterweight rod and the support rod.
The two ends of the supporting rod are respectively provided with a bearing, the outer ring of each bearing is vertically arranged on the rack, and the adjusting mechanism adjusts the height of the bearing on the rack.
The adjustable bearing is characterized in that a vertical strip-shaped hole is formed in the rack, the outer ring of the bearing is arranged in the vertical strip-shaped hole in a sliding mode, a support plate is arranged on the outer ring of the bearing in an extending mode, a vertical slide rod is arranged at the bottom of the rack, the upper end of the vertical slide rod is arranged on the support plate in a sliding mode, the adjusting mechanism comprises an adjusting screw rod arranged on the rack on one side of the support rod, the adjusting screw rod is arranged vertically and in parallel with the vertical slide rod, a nut is arranged on the support plate, and the adjusting screw rod is matched with the nut.
And the lower end of the adjusting screw rod is rotatably arranged at the lower end position of the rack.
The support slide block is arranged in the vertical bar-shaped hole in a sliding mode, and the support slide block and the vertical slide bar form sliding fit in the vertical direction.
The elastic supporting unit comprises a supporting spring sleeved on the vertical sliding rod, and two ends of the supporting spring are respectively abutted against the supporting plate and the supporting slide block.
The both sides of die-pin are provided with scrapes the tablet, scrape the tablet and arrange and scrape the outside of material blade and membrane along the length direction of die-pin and support and lean on.
The both ends of scraping the material piece are provided with the pivot, pivot shaft formula sets up on the frame plate that the bearing inner race extends, the cover is equipped with the torsional spring in the pivot, the both ends of torsional spring support with pivot and frame plate respectively and lean on.
The scraper brush is arranged along the length direction of the scraper sheet, and the brush head end of the scraper brush is abutted against the outer side of the membrane.
The lower end of the rack is arranged on the adjustable rail in a sliding mode, and the length direction of the adjustable rail is horizontal and perpendicular to the length direction of the supporting rod.
Toggle mechanism is including setting up the regulation band pulley at the die-pin other end, connect through the hold-in range between the regulation band pulley, be provided with on the adjustable track and dial the frame, dial and be provided with vertical slide opening on the frame, it is provided with the stirring slider to slide in the vertical slide opening, it is provided with the stirring band pulley to dial the last rotation type of slider, stir the band pulley and be connected with the hold-in range, it slides and sets up on the slide bar to stir the slider, the cover is equipped with the extension spring on the slide bar, the both ends of extension spring are held with stirring slider and vertical slide opening respectively and are connected.
The invention has the technical effects that: the model that the good coating of spraying was put on the die-pin, and the die-pin realizes the bearing to the model, sets up the membrane on the die-pin, utilizes membrane and model contact to can effectively solve the direct model surface coating that causes with the die-pin contact of model and dry and knot and incomplete problem, ensure that the model surface is smooth, thereby ensure subsequent casting finished product surface quality.
Drawings
FIGS. 1 and 2 are schematic views of two kinds of perspective structures of a lost foam pattern drying rack;
FIG. 3 is a left side view of the lost foam pattern drying rack;
FIG. 4 is a front view of a lost foam pattern drying rack;
FIGS. 5 and 6 are schematic views of two perspective views of a single lost foam pattern drying rack;
FIGS. 7 and 8 are schematic views of two views of one end of a single lost foam pattern drying rack;
FIGS. 9 and 10 are schematic views of two views of the other end of a single lost foam pattern drying rack;
fig. 11 is a left side view of a single lost foam pattern drying rack.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention will now be described in detail with reference to the following examples. It is to be understood that the following text is merely illustrative of one or more specific embodiments of the invention and does not strictly limit the scope of the invention as specifically claimed. As used herein, the terms "parallel" and "perpendicular" are not limited to their strict geometric definitions, but include tolerances for machining or human error, legibility and inconsistency;
the lost foam pattern drying rack of the present invention will be described in detail with reference to the accompanying drawings, which are shown in fig. 1 to 11:
a lost foam pattern drying rack comprises a plurality of support rods 10, wherein the support rods 10 are arranged horizontally and in parallel, membranes 20 are sleeved on the support rods, the membranes 20 penetrate through the support rods 10 along the length direction, and the membranes 20 rotate along the support rods 10;
referring to fig. 1 to 3, a pattern sprayed with a coating is placed on a support rod 10, the support rod 10 supports the pattern, a film 20 is arranged on the support rod 10, and the film 20 is in contact with the pattern, so that the problem that the coating on the surface of the pattern is dry and incomplete due to direct contact between the pattern and the support rod 10 can be effectively solved, the surface of the pattern is smooth, and the surface quality of a subsequent cast product is ensured;
the film 20 can rotate along the support rod 10, that is, the position of the film 20 contacting with the support rod 10 can be adjusted, so that the conversion of different positions of the film 20 can be realized, the clean film 20 is ensured to contact with a new glued pattern, and after the pattern is dried, the pattern can be directly taken down from the bracket 10, thereby avoiding the problem of paint loss on the surface of the pattern caused by the adhesion problem.
As a preferred scheme of the present invention, two ends of the plurality of support rods 10 are respectively disposed on the rack 30, positions of the plurality of support rods 10 in a vertical direction of the rack 30 are adjustable, and a distance between adjacent support rods 10 is adjustable;
the position between the supporting rod 10 and the supporting rod 10 is adjustable, so that more molds of different model sizes can be supported, the vertical position of the supporting rod 10 on the rack 30 can be adjusted, the shape of the supporting surface of the supporting rod 10 can be changed, and the supporting rod can be adapted to the support of various molds with different shapes.
Further, the film 20 is in a sleeve shape and sleeved on the support rod 10, a weight rod 40 is arranged in a tube cavity of the film 20, the weight rod 40 and the support rod 10 are arranged in parallel in the length direction, the weight rod 40 and the support rod 10 are far away from each other and tension the film 20;
in order to tension the film 20, the section perimeter of the film 20 is far greater than the section perimeter of the support rod 10, the film 20 is tensioned under the action of the weight rod 40, so as to avoid the problem that the film 20 on the support rod 10 is wrinkled, so as to avoid the increase of the contact area of the film 20 and the pattern, so as to ensure the quality of the dried pattern after being taken off, and the weight rod 40 tensions the film 20, so that the positions of the film 20 and the support rod 10 can be conveniently switched, so as to ensure that the clean upper surface of the film 20 is positioned above the support rod 10.
As a preferential scheme of the invention, the diameter of the support rod 10 is larger than the rod diameter of the counterweight rod 40, and the toggle mechanism toggles the support rod 10 to be in an interval rotating state;
the diameter of the support rod 10 is preferably 2 to 3 times of the diameter of the balance weight rod 40, so that the contact area of the membrane 20 and the support rod 10 is increased, and the support rod 10 can be conveniently stirred at a certain angle through a stirring mechanism, so that the clean membrane 20 is overturned to the position above the support rod 10 and is contacted with the pattern.
More specifically, in order to increase the contact friction force between the support rod 10 and the film 20, so that the film 20 can rotate on the support rod 10, an elastic support unit is arranged between the counterweight rod 40 and the support rod 10, and the elastic support unit is used for elastically tensioning the counterweight rod 40 and the support rod 10;
a friction surface or a convex rib is arranged above the supporting rod 10 to increase the friction force between the supporting rod 10 and the film 20.
More specifically, in order to realize the vertical direction adjustability and rotation of the supporting rod 10, two ends of the supporting rod 10 are respectively provided with a bearing 11, an outer ring of the bearing 11 is vertically arranged on the rack 30, and the adjusting mechanism adjusts the height of the bearing 11 on the rack 30;
the supporting rod 10 is rotatably arranged on the bearing 11, and the height position of the bearing 11 and the supporting rod 10 on the frame 30 can be adjusted through an adjusting mechanism.
Specifically, a vertical strip-shaped hole 301 is formed in the rack 30, an outer ring of the bearing 11 is slidably arranged in the vertical strip-shaped hole 301, a support plate 111 is extended from the outer ring of the bearing 11, a vertical slide rod 302 is arranged at the bottom of the rack 30, the upper end of the vertical slide rod 302 is slidably arranged on the support plate 111, the adjusting mechanism comprises an adjusting screw rod 31 arranged on the rack 30 on one side of the support rod 10, the adjusting screw rod 31 is vertically arranged in parallel with the vertical slide rod 302, a nut 112 is arranged on the support plate 111, and the adjusting screw rod 31 is matched with the nut 112;
when the height of the support rod 10 is adjusted, the position of the bearing 11 in the vertical strip-shaped hole 301 is adjusted in a mode of manually rotating the adjusting screw rod 31, so that the bearing is placed in a mode of adapting to patterns with different shapes, and the patterns are placed on the support rod 10.
Specifically, the lower end of the adjusting screw 31 is rotatably disposed at the lower end of the frame 30.
More specifically, in order to enable the weight rod 40 to change along with the height change of the support rod 10, one end of the weight rod 40 is provided with a support slider 41, the support slider 41 is slidably disposed in the vertical strip-shaped hole 301, and the support slider 41 and the vertical sliding rod 302 form a sliding fit in the vertical direction.
In order to realize the elastic tensioning of the membrane 20, the elastic supporting unit comprises a supporting spring 42 sleeved on the vertical sliding rod 302, and two ends of the supporting spring 42 respectively abut against the supporting plate 111 and the supporting slider 41.
In order to scrape off dried coating slag on the surface of the film 20 and ensure the surface of the film 20 to be clean, scraping sheets 50 are arranged on two sides of the support rod 10, and the scraping sheets 50 are arranged along the length direction of the support rod 10 and the scraping cutting edges are abutted against the outer side of the film 20.
Specifically, for making scraping material blade and membrane 20 of scraping material piece 50 support and lean on, the both ends of scraping material piece 50 are provided with pivot 51, pivot 51 pivot formula sets up on the frame plate that the bearing 11 outer lane extends, the cover is equipped with torsional spring 52 on the pivot 51, torsional spring 52's both ends support with pivot 51 and frame plate respectively and support.
In order to realize flattening of the film 20 and brushing of surface slag, a scraping brush 53 is arranged on the outer side of the scraping sheet 50 in an adjustable mode, the scraping brush 53 is arranged along the length direction of the scraping sheet 50, and the brush head end of the scraping brush 53 is abutted to the outer side of the film 20.
In order to adjust the position between the adjacent support rods 10, the lower end of the frame 30 is slidably disposed on an adjustable rail 32, and the length direction of the adjustable rail 32 is horizontal and perpendicular to the length direction of the support rods 10.
For the synchronous adjustment of synchronous realization to membrane 20 position on die-pin 10, toggle mechanism is including setting up the regulation band pulley 12 at the die-pin 10 other end, connect through hold-in range 13 between the regulation band pulley 12, be provided with on the adjustable track 32 and dial frame 14, it is provided with vertical slide opening 141 on the frame 14 to dial, it shifts slider 142 to slide to be provided with in vertical slide opening 141, it is provided with and dials pulley 143 to dial the last rotation type of slider 142, it is connected with hold-in range 13 to dial pulley 143, it slides and sets up on slide bar 144 to dial slider 142, the cover is equipped with extension spring 145 on slide bar 144, the both ends of extension spring 145 are connected with stirring slider 142 and vertical slide opening 141 hole end respectively.
The drying method of the lost foam pattern comprises the following steps:
firstly, adjusting an adjusting mechanism to enable the heights of a plurality of support rods 10 to be matched with the supports of patterns with different shapes;
secondly, adjusting the distance between adjacent support rods 10 to enable the support rods 10 to effectively support the patterns with different lengths and sizes;
thirdly, rotating the toggle mechanism to enable the supporting rod 10 to be positioned on the rack 30 to synchronously rotate, and enabling the unused new film 20 to be rotatably arranged on the supporting rod 10 to realize the support of the pattern;
fourthly, placing the pattern coated with the coating on a support rod 10 and pushing the pattern to a drying room to realize the drying operation of the pattern on the support rod 10;
and fifthly, after the pattern is dried, taking down the pattern from the support rod 10, and rotating the toggle mechanism to enable the unused new film 20 to be rotatably arranged on the support rod 10 so as to support the pattern to be dried.
Claims (8)
1. The drying method of the lost foam pattern is characterized by comprising the following steps: the drying method of the lost foam pattern comprises the following steps:
firstly, adjusting an adjusting mechanism to enable the heights of a plurality of support rods (10) to be matched with the supports of patterns with different shapes;
secondly, adjusting the distance between adjacent support rods (10) to enable the support rods (10) to effectively support the patterns with different lengths and sizes;
thirdly, rotating the toggle mechanism to enable the support rod (10) to be positioned on the rack (30) to synchronously rotate, and enabling the unused new film (20) to be rotatably arranged on the support rod (10) to realize the support of the pattern;
fourthly, placing the pattern coated with the coating on a supporting rod (10) and pushing the pattern to a drying room to realize the drying operation of the pattern on the supporting rod (10);
fifthly, after the pattern is dried, taking down the pattern from the support rod (10), and rotating the toggle mechanism to enable an unused new film (20) to be rotatably arranged on the support rod (10) so as to support the pattern to be dried;
two ends of the support rods (10) are respectively arranged on the rack (30), the positions of the support rods (10) in the vertical direction of the rack (30) can be adjusted, and the distance between every two adjacent support rods (10) can be adjusted;
the membrane (20) is in a sleeve shape, the plurality of support rods (10) are sleeved with the membrane (20), a balance weight rod (40) is arranged in a tube cavity of the membrane (20), the balance weight rod (40) and the support rods (10) are arranged in parallel in the length direction, and the balance weight rod (40) and the support rods (10) are far away from each other and tension the membrane (20); the diameter of the support rod (10) is larger than the rod diameter of the counterweight rod (40), and the toggle mechanism toggles the support rod (10) to be in an interval rotating state.
2. The evaporative pattern drying method as defined in claim 1, wherein: an elastic supporting unit is arranged between the balance weight rod (40) and the supporting rod (10), and the elastic supporting unit is used for realizing elastic tensioning between the balance weight rod (40) and the supporting rod (10).
3. The evaporative pattern drying method as defined in claim 2, wherein: bearings (11) are respectively arranged at two ends of the supporting rod (10), the outer ring of each bearing (11) is vertically arranged on the rack (30), and the adjusting mechanism adjusts the height of each bearing (11) on the rack (30); the adjusting mechanism comprises an adjusting screw rod (31) arranged on the rack (30) on one side of a supporting rod (10), the adjusting screw rod (31) is vertical and arranged in parallel with the vertical sliding rod (302), a nut (112) is arranged on the supporting plate (111), and the adjusting screw rod (31) is matched with the nut (112); the lower end of the adjusting screw rod (31) is rotatably arranged at the lower end of the rack (30).
4. A method for drying a pattern of a lost foam according to claim 3, characterized in that: the weight bar (40) one end is provided with supports slider (41), support slider (41) and slide and set up in vertical bar hole (301), support slider (41) and vertical slide bar (302) constitute the sliding fit of vertical direction.
5. The evaporative pattern drying method as defined in claim 4, wherein: the elastic supporting unit comprises a supporting spring (42) sleeved on the vertical sliding rod (302), and two ends of the supporting spring (42) are respectively abutted against the support plate (111) and the supporting slide block (41).
6. The evaporative pattern drying method as defined in claim 5, wherein: and material scraping sheets (50) are arranged on two sides of the support rod (10), the material scraping sheets (50) are arranged along the length direction of the support rod (10), and the material scraping cutting edges are abutted against the outer side of the film (20).
7. The evaporative pattern drying method as defined in claim 6, wherein: rotating shafts (51) are arranged at two ends of the scraping sheet (50), the rotating shafts (51) are arranged on frame plates extending from the outer ring of the bearing (11) in a rotating mode, torsion springs (52) are sleeved on the rotating shafts (51), and two ends of each torsion spring (52) are abutted to the rotating shafts (51) and the frame plates respectively; the outer side of the scraping sheet (50) is provided with a scraping brush (53) in an adjustable mode, the scraping brush (53) is arranged along the length direction of the scraping sheet (50), and the brush head end of the scraping brush (53) abuts against the outer side of the membrane (20).
8. The evaporative pattern drying method as defined in claim 7, wherein: the lower end of the rack (30) is arranged on an adjustable track (32) in a sliding manner, and the length direction of the adjustable track (32) is horizontal and vertical to the length direction of the supporting rod (10); toggle mechanism is including setting up regulation band pulley (12) at die-pin (10) other end, connect through hold-in range (13) between regulation band pulley (12), it dials frame (14) to be provided with on adjustable track (32), dial and be provided with vertical slide opening (141) on frame (14), it shifts slider (142) to slide to be provided with in vertical slide opening (141), it is provided with to dial band pulley (143) to dial the last rotation type of slider (142), it is connected with hold-in range (13) to dial band pulley (143), it slides and sets up on slide bar (144) to dial slider (142), the cover is equipped with extension spring (145) on slide bar (144), the both ends of extension spring (145) are connected with stirring slider (142) and vertical slide opening (141) hole end respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010335759.0A CN111266527B (en) | 2020-04-25 | 2020-04-25 | Drying method for lost foam pattern |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010335759.0A CN111266527B (en) | 2020-04-25 | 2020-04-25 | Drying method for lost foam pattern |
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| Publication Number | Publication Date |
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| CN111266527A CN111266527A (en) | 2020-06-12 |
| CN111266527B true CN111266527B (en) | 2021-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010335759.0A Active CN111266527B (en) | 2020-04-25 | 2020-04-25 | Drying method for lost foam pattern |
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| CN115112888B (en) * | 2022-08-25 | 2022-12-13 | 山东博科快速检测技术有限公司 | Preparation method of novel coronavirus antigen detection reagent card |
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| SU839655A1 (en) * | 1979-09-06 | 1981-06-23 | Московский Машиностроительныйзавод "Салют" | Unit for producing ceramic moulds with use of investment patterns |
| CN206263202U (en) * | 2016-11-30 | 2017-06-20 | 江苏沃得机电集团有限公司 | The white mould drying device of evaporative pattern |
| CN206276873U (en) * | 2016-12-20 | 2017-06-27 | 南京诺瑞特铸造有限公司 | A kind of evaporative pattern dries frame |
| CN207095205U (en) * | 2017-08-30 | 2018-03-13 | 临澧县新安耐磨材料制造有限责任公司 | Novel lost foam drying unit |
| CN108844346A (en) * | 2018-05-14 | 2018-11-20 | 安徽工程大学 | A kind of anti-bonding drying unit |
| CN110653337A (en) * | 2019-10-18 | 2020-01-07 | 常州市程伟铸造有限公司 | Lost foam casting process |
-
2020
- 2020-04-25 CN CN202010335759.0A patent/CN111266527B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU839655A1 (en) * | 1979-09-06 | 1981-06-23 | Московский Машиностроительныйзавод "Салют" | Unit for producing ceramic moulds with use of investment patterns |
| CN206263202U (en) * | 2016-11-30 | 2017-06-20 | 江苏沃得机电集团有限公司 | The white mould drying device of evaporative pattern |
| CN206276873U (en) * | 2016-12-20 | 2017-06-27 | 南京诺瑞特铸造有限公司 | A kind of evaporative pattern dries frame |
| CN207095205U (en) * | 2017-08-30 | 2018-03-13 | 临澧县新安耐磨材料制造有限责任公司 | Novel lost foam drying unit |
| CN108844346A (en) * | 2018-05-14 | 2018-11-20 | 安徽工程大学 | A kind of anti-bonding drying unit |
| CN110653337A (en) * | 2019-10-18 | 2020-01-07 | 常州市程伟铸造有限公司 | Lost foam casting process |
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| CN111266527A (en) | 2020-06-12 |
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Effective date of registration: 20210615 Address after: 246600 Anhui Xuantong Electromechanical Technology Co., Ltd., Lianyun Development Zone, Yuexi County, Anqing City, Anhui Province Applicant after: Anhui Xuantong Electromechanical Technology Co.,Ltd. Address before: 246600 Tengyun village, Lianyun Township, Yuexi County, Anqing City, Anhui Province Applicant before: ANHUI SHENGFENG MACHINERY Co.,Ltd. |
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