CN216801600U - Reliable vacuum casting box body of lost foam - Google Patents
Reliable vacuum casting box body of lost foam Download PDFInfo
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- CN216801600U CN216801600U CN202123018856.6U CN202123018856U CN216801600U CN 216801600 U CN216801600 U CN 216801600U CN 202123018856 U CN202123018856 U CN 202123018856U CN 216801600 U CN216801600 U CN 216801600U
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- air guide
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- air exhaust
- box body
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- 238000005266 casting Methods 0.000 title claims abstract description 49
- 239000006260 foam Substances 0.000 title claims abstract description 11
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 239000000725 suspension Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 8
- 244000035744 Hura crepitans Species 0.000 description 19
- 239000004576 sand Substances 0.000 description 17
- 238000000034 method Methods 0.000 description 6
- 238000005086 pumping Methods 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a reliable lost foam vacuum casting box body.A box bottom and a box wall are fixed to form an upper opening box body structure, the box bottom is of a hollow structure, the top surface of the box bottom is provided with a plurality of bottom air exhaust holes, and the outer side of the box bottom is fixed with bottom air exhaust holes; the outer side of the box wall is provided with at least two longitudinal air guide channels, two ends of each longitudinal air guide channel are respectively provided with a transverse air guide channel which is vertically communicated with the longitudinal air guide channels, the longitudinal air guide channels and/or the transverse air guide channels are fixedly provided with side air exhaust pipes, and the inner side of the box wall is provided with a plurality of side air exhaust holes along the longitudinal air guide channels and/or the transverse air guide channels. The external air guide channel is convenient for daily airtight maintenance, and has the characteristics of simple structure, high structural strength, uniform pressure and convenient maintenance.
Description
Technical Field
The utility model belongs to the technical field of casting tools, and particularly relates to a reliable lost foam vacuum casting box body which is simple in structure, high in structural strength, uniform in pressure and convenient to maintain.
Background
The casting is a technological process of smelting metal into liquid meeting certain requirement, casting into casting cavity in the shape corresponding to the part, cooling, solidifying and cleaning to obtain part or blank in preset shape, size and performance. The cast part or blank is nearly formed, so that the aim of avoiding machining or little machining is fulfilled, the cost is reduced, and the manufacturing time is reduced to a certain extent, and the method is one of basic processes of the modern device manufacturing industry.
The vacuum casting is a casting method which combines a vacuum technology with sand mould casting, seals the mould cavity surface and the back surface of the sand mould by a plastic film, generates negative pressure by pumping air by a vacuum pump to generate difference between internal pressure and external pressure of the sand mould so as to fasten and form mould sand, takes out the mould (the lost mould does not need to be taken out), releases the negative pressure or stops pumping air after casting and solidification, and then disintegrates the mould sand to obtain a casting. Compared with the common casting, the vacuum casting can control the vacuum degree, so that the mold cavity compactness is higher, the quality of the casting can be effectively improved, and the vacuum casting has the advantages of high material utilization rate, reusable mold sand, long service life of a forming mold and a sand box and the like, and is widely applied to high-quality castings and large-scale castings.
The casting is generally performed by a sand box in both ordinary casting and vacuum casting. In the prior art, the box bottom and the box wall of the sand box for vacuum casting usually adopt a hollow sandwich structure, the inner sides of the box bottom and the box wall are provided with air exhaust holes to enable dry sand in the sand box to generate negative pressure, and the outer wall is provided with an air exhaust pipe communicated with an air exhaust device, so that although the basic function of vacuum casting can be met, the hollow structure of the box bottom and the box wall can cause the structural strength of the sand box to be reduced, the sand box is easy to deform to cause crush for large and heavy castings, and the quality of the castings is reduced and even scrapped. Therefore, in the prior art, a structure that a support plate is additionally arranged in a hollow interlayer is adopted, so that although the structural strength of the sand box is improved, the support plate is often difficult to basically correspond to the position of an air exhaust hole on the inner side, the strength of the position supported by the support plate is higher than that of the air exhaust hole far away from the support plate, and the local deformation of the box body is easily caused to influence the service life; and because the box bottom and the box wall are of an integral hollow structure, the large hollow area is easy to leak due to deformation in the hoisting process of the sand box, so that the vacuum degree in casting is reduced, the quality of a final casting is influenced, and the internal supporting plate also causes difficulty in daily maintenance. In addition, current vacuum casting sand box is in order to prevent that dry sand from getting into hollow intermediate layer, generally is to set up whole filter screen in the incasement, and although the filter screen is changed comparatively conveniently, the clearance of the dry sand of casting back of being not convenient for of filter screen of great area, and still damage the filter screen when the clearance easily moreover leads to the routine maintenance cost higher.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a reliable vacuum casting box body of a lost foam, which has simple structure, high structural strength, uniform pressure and convenient maintenance.
The utility model is realized by the following steps: the box comprises a box bottom, box walls, bottom air exhaust pipes and bottom air exhaust holes, wherein the box bottom and the box walls around the upper end are fixedly connected to form a box body structure with an opening at the upper part; the air exhaust device is characterized by further comprising a longitudinal air guide passage, a transverse air guide passage, a side air exhaust pipe and side air exhaust holes, wherein at least two parallel longitudinal air guide passages are vertically arranged on the outer side of the box wall at intervals, the transverse air guide passages vertically communicated with the longitudinal air guide passage are respectively arranged at two ends of the outer side of the box wall, the longitudinal air guide passage and/or the transverse air guide passage are fixedly provided with the side air exhaust pipes communicated with the inside and the outside, and the plurality of side air exhaust holes are arranged on the inner side of the box wall at intervals along the longitudinal air guide passage and/or the transverse air guide passage.
The utility model has the beneficial effects that:
1. according to the utility model, the bottom air exhaust holes are formed in the box bottom, the side air exhaust holes are formed in the longitudinal air guide passage and/or the transverse air guide passage along the box wall, a plurality of air exhaust holes can be flexibly formed in the box bottom and the box wall as required, and dry sand in the sand box is uniformly compacted through negative pressure, so that the pressure on the periphery and the bottom surface of a casting in the sand box can be ensured to be uniform, the density of the casting during molding is uniform, the obtained casting has good compactness, and the finished product quality of the casting is improved.
2. The vertical air guide channel and the horizontal air guide channel which are vertically communicated are arranged on the outer side of the box wall, so that the air guide channel can be used as an air guide channel and a reinforcing rib to improve the structural strength of the box wall, and the air guide channel arranged outside the box wall is convenient for daily airtight maintenance. Especially, the filter screen passes through the form that fixed frame was fixed on the aspirating hole, both can reduce the area of filter screen and the clearance of the dry sand of back of being convenient for cast, still forms the protection to the filter screen when fixed frame fixed filter screen moreover, damage the filter screen when effectively avoiding clearing up to the routine maintenance cost of filter screen has been reduced.
3. The side air exhaust holes are arranged along the longitudinal air guide passages and/or the transverse air guide passages, so that the air guide passages arranged on the periphery of the side air exhaust holes are used as reinforcing ribs to reinforce the side wall, the deformation of the side wall weak link can be effectively weakened or even eliminated, and the service life of the box body is prolonged. Especially, the supporting plates which are parallel to each other are arranged in the box bottom, and the bottom air exhaust hole is formed between the two adjacent supporting plates, so that the box bottom can be reinforced at the bottom air exhaust hole, the service life of the box bottom can be prolonged, and the service life of the box body is further prolonged.
In conclusion, the utility model has the characteristics of simple structure, high structural strength, uniform pressure and convenient maintenance.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a side bottom view of FIG. 1;
FIG. 3 is a cross-sectional view of FIG. 1;
in the figure: 1-box bottom, 2-box wall, 3-bottom air exhaust pipe, 4-bottom air exhaust hole, 5-longitudinal air guide passage, 6-transverse air guide passage, 7-side air exhaust pipe, 8-side air exhaust hole, 9-reinforcing plate, 10-suspension rod, 11-support plate, 12-fixing frame and 13-filter screen.
Detailed Description
The utility model is further illustrated by the following figures and examples, which are not intended to limit the utility model in any way, and any variations or modifications which are based on the teachings of the utility model are intended to be within the scope of the utility model.
As shown in fig. 1, 2 and 3, the utility model comprises a box bottom 1, a box wall 2, a bottom air exhaust pipe 3 and bottom air exhaust holes 4, wherein the box bottom 1 and the box wall 2 around the upper end are fixedly connected to form a box body structure with an open upper part, the box bottom 1 is a hollow structure, a plurality of bottom air exhaust holes 4 are arranged at intervals on the top surface of the box bottom 1, and the bottom air exhaust holes 4 communicated with the inside and the outside are fixedly arranged on the outer side of the box bottom 1; the air-conditioning cabinet is characterized by further comprising a longitudinal air guide channel 5, a transverse air guide channel 6, a side air exhaust pipe 7 and side air exhaust holes 8, wherein at least two parallel longitudinal air guide channels 5 are vertically arranged on the outer side of the cabinet wall 2 at intervals, the transverse air guide channels 6 vertically communicated with the longitudinal air guide channel 5 are respectively arranged at two ends of the longitudinal air guide channel 5 on the outer side of the cabinet wall 2, the side air exhaust pipes 7 communicated with the inside and the outside are fixedly arranged on the longitudinal air guide channel 5 and/or the transverse air guide channel 6, and a plurality of side air exhaust holes 8 are arranged on the inner side of the cabinet wall 2 at intervals along the longitudinal air guide channel 5 and/or the transverse air guide channel 6.
The transverse air guide passages 6 on the peripheral box walls 2 of the box body structure are communicated end to end, and the side exhaust pipe 7 is fixedly arranged on the longitudinal air guide passage 5 or the transverse air guide passage 6 of the box wall 2 on one side; or the transverse air guide channels 6 on the peripheral box walls 2 of the box body structure are respectively sealed end to end, and the side exhaust pipes 7 are respectively fixedly arranged on the longitudinal air guide channels 5 or the transverse air guide channels 6 of the box walls 2.
The transverse air guide channel 6 at the lower part of the box wall 2 is higher than the top surface of the box bottom 1, the transverse air guide channel 6 at the upper part is lower than the top surface of the box body, and the reinforcing plate 9 is fixedly arranged at the lower end of the transverse air guide channel 6 at the lower part of the box wall 2 and/or at the upper end of the transverse air guide channel 6 at the upper part.
The longitudinal air guide passage 5 and the transverse air guide passage 6 are respectively formed by closing and fixing channel steel or a square pipe cover with an opening at one side on the box wall 2 to form a square passage, and the width or the diameter of the side air exhaust hole 8 is smaller than the width of the inner edge of the square passage of the longitudinal air guide passage 5 and the transverse air guide passage 6.
The utility model discloses a take out the air bag, including the bottom of the case base 1, be provided with the backup pad 11 that the both ends just are parallel to each other about the polylith connection in the hollow structure of the bottom of the case base 1, the wind channel that backup pad 11 formed communicates each other in the hollow structure of the bottom of the case base 1, end air exhaust hole 4 sets up between two adjacent backup pads 11 along the length direction of backup pad 11.
The bottom air exhaust hole 4 and the side air exhaust hole 8 are square or round holes, the bottom air exhaust hole 4 and/or the side air exhaust hole 8 are/is fixedly provided with a fixing frame 12 respectively, and a filter screen 13 is arranged in the fixing frame 12.
The fixed frame 12 is of a square or round structure, the filter screen 13 is fixed on the bottom surface of the fixed frame 12, and the bottom surface or the side surface of the fixed frame 12 is fixedly connected with the top surface of the box bottom 1 and the inner side of the box wall 2.
The square fixing frame 12 is of a structure shaped like a Chinese character 'tian' or a Chinese character 'ri', and the round fixing frame 12 is of a structure shaped like a Chinese character 'tian'; the fixing frame 12 is welded or screwed with the top surface of the box bottom 1 and the inner side of the box wall 2.
The working principle and the working process of the utility model are as follows:
as shown in fig. 1, 2 and 3, during casting, a sand box is filled with a part of dry sand without adhesive, a lost foam is put into the sand box, then the sand box is filled with the dry sand to cover the lost foam, and the sand obtains the maximum density through a vibrating device to form a cope; then, covering a plastic film with the size similar to the opening size of the sand box on the top of the sand box, and manually connecting the sprue basin with the sprue; and then, connecting the bottom air exhaust pipe 3 and the side air exhaust pipe 7 with a vacuum-pumping device, performing vacuum-pumping operation in the sand box to form negative pressure in the sand box to compact the dry sand, then performing casting, wherein the vacuum degree of the sand box must be ensured in the casting process, removing vacuum after the casting is cooled, directly dropping the sand and the casting, and returning the sand to the system for recycling after cooling.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A reliable lost foam vacuum casting box body comprises a box bottom (1), box walls (2), bottom air exhaust pipes (3) and bottom air exhaust holes (4), wherein the box bottom (1) is fixedly connected with the box walls (2) on the periphery of the upper end to form a box body structure with an opening at the upper part, the box bottom (1) is of a hollow structure, a plurality of bottom air exhaust holes (4) are arranged at intervals on the top surface of the box bottom, and the bottom air exhaust holes (4) communicated with the inside and the outside are fixedly arranged on the outer side of the box bottom (1); the air-purifying tank is characterized by further comprising a longitudinal air guide channel (5), transverse air guide channels (6), side air exhaust pipes (7) and side air exhaust holes (8), wherein at least two parallel longitudinal air guide channels (5) are vertically arranged on the outer side of the tank wall (2) at intervals, the transverse air guide channels (6) which are vertically communicated with the longitudinal air guide channels (5) are respectively arranged on the outer side of the tank wall (2) at two ends of the longitudinal air guide channels (5), the side air exhaust pipes (7) which are communicated with the inside and the outside are fixedly arranged on the longitudinal air guide channels (5) and/or the transverse air guide channels (6), and the plurality of side air exhaust holes (8) are arranged on the inner side of the tank wall (2) at intervals along the longitudinal air guide channels (5) and/or the transverse air guide channels (6).
2. The reliable evaporative pattern vacuum casting box body according to claim 1, wherein the transverse air guide channels (6) on the peripheral box walls (2) of the box body structure are communicated end to end, and the side exhaust pipe (7) is fixedly arranged on the longitudinal air guide channel (5) or the transverse air guide channel (6) of one side box wall (2); or all the transverse air guide passages (6) on the peripheral box walls (2) of the box body structure are respectively sealed end to end, and the side air exhaust pipes (7) are respectively and fixedly arranged on the longitudinal air guide passages (5) or the transverse air guide passages (6) of all the side box walls (2).
3. The reliable evaporative pattern vacuum casting box body according to claim 2, characterized in that the lower transverse air guide duct (6) of the box wall (2) is higher than the top surface of the box bottom (1) and the upper transverse air guide duct (6) is lower than the top surface of the box body, and the lower end of the lower transverse air guide duct (6) and/or the upper end of the upper transverse air guide duct (6) of the box wall (2) is fixedly provided with a reinforcing plate (9).
4. The reliable vacuum casting box body of the lost foam according to claim 3, characterized in that the outer sides of the two box walls (2) with symmetrical structure of the box body are respectively fixedly provided with a suspension rod (10) on a reinforcing plate (9).
5. The reliable evaporative pattern vacuum casting box body according to claim 2, wherein the longitudinal air guide duct (5) and the transverse air guide duct (6) are respectively formed into a square passage by covering channel steel or a square tube with an opening on one side on the box wall (2) in a sealing and fixing manner, and the width or diameter of the side air exhaust hole (8) is smaller than the width of the inner edge of the square passage of the longitudinal air guide duct (5) and the transverse air guide duct (6).
6. The reliable evaporative pattern vacuum casting box body according to claim 2, wherein a plurality of parallel support plates (11) are arranged in the hollow structure of the box bottom (1), the upper end and the lower end of each support plate are connected, the air ducts formed by the support plates (11) in the hollow structure of the box bottom (1) are communicated with each other, and the bottom air exhaust holes (4) are arranged between the two adjacent support plates (11) along the length direction of the support plates (11).
7. The reliable evaporative pattern vacuum casting box body according to any one of claims 2 to 6, wherein the bottom air exhaust holes (4) and the side air exhaust holes (8) are square or round holes, the bottom air exhaust holes (4) and/or the side air exhaust holes (8) are respectively and fixedly provided with a fixing frame (12), and a filter screen (13) is arranged in the fixing frame (12).
8. The reliable vacuum casting box body with the lost foam according to claim 7 is characterized in that the fixing frame (12) is of a square or round structure, the filter screen (13) is fixed on the bottom surface of the fixing frame (12), and the bottom surface or the side surface of the fixing frame (12) is fixedly connected with the top surface of the box bottom (1) and the inner side of the box wall (2).
9. The reliable vacuum casting box with the lost foam according to claim 8, characterized in that the square fixed frame (12) is of a structure like Chinese character 'tian' or 'ri', and the round fixed frame (12) is of a structure like Chinese character 'tian'; the fixing frame (12) is welded or screwed with the top surface of the box bottom (1) and the inner side of the box wall (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123018856.6U CN216801600U (en) | 2021-12-03 | 2021-12-03 | Reliable vacuum casting box body of lost foam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123018856.6U CN216801600U (en) | 2021-12-03 | 2021-12-03 | Reliable vacuum casting box body of lost foam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216801600U true CN216801600U (en) | 2022-06-24 |
Family
ID=82052116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123018856.6U Active CN216801600U (en) | 2021-12-03 | 2021-12-03 | Reliable vacuum casting box body of lost foam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216801600U (en) |
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2021
- 2021-12-03 CN CN202123018856.6U patent/CN216801600U/en active Active
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