CN109550891B - Lathe bed lost foam and method for casting lathe bed by using same - Google Patents
Lathe bed lost foam and method for casting lathe bed by using same Download PDFInfo
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- CN109550891B CN109550891B CN201710874465.3A CN201710874465A CN109550891B CN 109550891 B CN109550891 B CN 109550891B CN 201710874465 A CN201710874465 A CN 201710874465A CN 109550891 B CN109550891 B CN 109550891B
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- 239000006260 foam Substances 0.000 title claims abstract description 68
- 238000005266 casting Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 18
- 229910001018 Cast iron Inorganic materials 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 244000035744 Hura crepitans Species 0.000 claims description 72
- 239000004576 sand Substances 0.000 claims description 46
- 230000003014 reinforcing effect Effects 0.000 claims description 31
- 238000000465 moulding Methods 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 239000003973 paint Substances 0.000 claims description 5
- 230000001680 brushing effect Effects 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 238000011049 filling Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 37
- 238000005728 strengthening Methods 0.000 description 4
- 238000010114 lost-foam casting Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010115 full-mold casting Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- 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
- B22C7/026—Patterns made from expanded plastic materials by assembling preformed parts
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Devices For Molds (AREA)
Abstract
The invention discloses a lathe bed lost foam and a method for pouring a lathe bed, wherein the lathe bed lost foam comprises a detachable upper die unit and a detachable lower die unit which are made of foam plates, and the beneficial effects of the invention are that: the lost foam is removed before the liquid cast iron is poured, no foam plate burns in the whole casting process, the process is environment-friendly, the cast lathe bed is not mixed with waste generated after the foam plate burns, the quality of the lathe bed is more stable, the casting of the liquid cast iron is blocked by the foam, the manufacturing of one lathe bed can be completed basically through one-time casting, and the rejection rate of the lost foam is lower.
Description
Technical Field
The invention relates to a lathe bed lost foam and a method for pouring a lathe bed by using the same.
Background
Lost foam casting (also called full mold casting) is a novel casting method which is to combine paraffin or foam models with similar size and shape as castings into model clusters by bonding, brush refractory coating, dry, then embed in dry quartz sand for vibration molding, pour under negative pressure to gasify the models, occupy the model positions by liquid metal, solidify and cool to form castings. The lost foam casting method in the prior art is of an integral structure which is not detachable, the lost foam casting method is characterized in that sand is filled in a sand box and a pouring gate is opened, when liquid cast iron is poured, the lost foam is burnt, and the lost foam is burnt to waste foam, and the environment-friendly idea is contrary to the current environment-friendly idea because the lost foam is likely to cause blockage of the pouring gate when the lost foam burns slowly from the pouring gate to the direction away from the pouring gate, so that casting is difficult to continue, especially when a cast workpiece is large, on the other hand, products after the lost foam burns can not be discharged from the pouring gate due to the liquid cast iron and can only be mixed in the cast product, so that the quality of the cast product is unstable, the rejection rate of the product is high, and foam is wasted.
Disclosure of Invention
The invention aims to provide the lost foam of the lathe bed, which solves the technical defects of serious pollution, unstable product quality and high product rejection rate caused by insufficient combustion of the lost foam in lathe bed casting in the prior art.
In order to solve the problems, the technical scheme adopted by the invention is that the bed vanishing mould comprises a detachable upper mould unit and a detachable lower mould unit which are made of foam plates.
The lower die unit comprises a front vertical plate, a left vertical plate, a rear vertical plate, a right vertical plate and a bottom plate, wherein the front vertical plate, the left vertical plate, the rear vertical plate and the right vertical plate are connected end to end and are glued, the front vertical plate comprises a first front vertical plate unit with the left end being glued with the left vertical plate, a second front vertical plate unit with the right end being glued with the right vertical plate, a third front vertical plate unit with the front end being glued with the right end of the first front vertical plate unit and being parallel to the left vertical plate, a fourth front vertical plate unit with the front end being glued with the left end of the second front vertical plate unit and being parallel to the right vertical plate, and a fifth front vertical plate unit with the two ends being glued with the rear end of the third front vertical plate unit and the rear end of the fourth front vertical plate unit respectively, the bottom plate is concave, the bottoms of the front vertical plate, the left vertical plate, the rear vertical plate and the right vertical plate are glued with the edges of the bottom plate, the left vertical plate is provided with two lower left through holes, the right vertical plate is provided with a front right through hole and a rear right through hole, the first front vertical plate unit is provided with a left first through hole and a right first through hole, the second front vertical plate unit is provided with a left second through hole and a right second through hole, the third front vertical plate unit and the fourth front vertical plate unit are respectively provided with a third through hole and a fourth through hole, the fifth front vertical plate unit is provided with a fifth through hole, the bottom plate is provided with a plurality of bottom plate through holes, a left connecting plate is bonded between the front vertical plate and the rear vertical plate, the left surface of the left connecting plate is bonded with the left vertical plate, the right side of the left connecting plate is provided with a first transverse plate, the right end of the first transverse plate is inclined downwards, the right side of the first transverse plate is provided with a second transverse plate, the second transverse plate is provided with a sixth through hole penetrating the upper and lower parts, the right side of the second transverse plate is bonded with a third transverse plate, the right end of the third transverse plate is bonded upwards and is bonded with the right vertical plate, the first diaphragm on be provided with two first strengthening ribs around, be provided with two second strengthening ribs around on the third diaphragm, the upper surface of first strengthening rib and third strengthening rib be the horizontal plane, the second diaphragm on around the sixth through-hole bond have preceding short slab, left short slab, back short slab and right short slab, preceding short slab, left short slab, back short slab and right short slab head and the tail bond in proper order.
The upper die unit include preceding backup pad, left backup pad, back backup pad and right branch fagging, preceding backup pad, left backup pad, back backup pad and right branch fagging bond from beginning to end, the rear end downward sloping of left backup pad and right branch fagging and the inclination of both equal, left backup pad on open and have left through-hole, right branch fagging on open and have right through-hole, preceding backup pad on open and have a plurality of preceding through-holes along its length direction, the top of preceding backup pad, left backup pad, back backup pad and right branch fagging be provided with the diaphragm, the lower surface of going up the diaphragm bond and have a plurality of upper reinforcing ribs, upper end and the lower extreme of going up the diaphragm bond respectively along its length direction and have slide rail and lower slide rail, upper slide rail and lower slide rail between bond and have a plurality of reinforcing plates.
According to the application, the original integrated lost foam is divided into two parts, the lost foam can be dug out from the sand box before casting, an empty sand mould is formed at the position of the dug lost foam, no lost foam is blocked when liquid cast iron is cast, casting of cast iron is facilitated, on the other hand, because the lost foam is dug out before casting, no lost foam burns in the sand box, pollution caused by burning of the lost foam is avoided, no lost foam burns waste residue, waste gas and the like are generated after cast iron is solidified, no cavity and the like are generated in the cast iron bed, the cast bed has stable quality, and the lost foam in the application can be reused, and has good economy.
Another object of the present invention is to provide a method for casting a lathe bed using the foregoing lost foam, comprising the steps of:
Step 1, using the upper surfaces of a front vertical plate or a left vertical plate or a rear vertical plate or a right vertical plate as reference surfaces, and using foam plates to line the spaces among the front vertical plate, the left vertical plate, the rear vertical plate and the right vertical plate so that the filled foam plates are positioned on the same horizontal plane with the upper surfaces of the front vertical plate, the left vertical plate, the rear vertical plate and the right vertical plate;
step 2, turning over the lower die unit in the step 1, enabling the bottom of the lower die unit to face upwards, placing the lower die unit in a first sand box with the bottom facing upwards, sanding and molding the first sand box, placing a third sand box on the first sand box, and sanding the third sand box;
step 3, turning over the first sand box and the third sand box in the step 2, enabling the lining of the lower die unit to face upwards, and removing the lined foam plate;
step 4, stacking a second sand box on the first sand box in the step 3, placing an upper die unit in the second sand box, and enabling the bottom of the upper die unit to be positioned at a proper position on the top of the lower die unit;
step 5, sanding and molding into the second sand box;
step 6, unpacking, namely removing the second sand box from the first sand box, and enabling one side of the upper die unit to be upward;
step 7, digging a lower die unit from a first sand box to form a lower sand mould, and digging an upper die unit from a second sand box to form an upper sand mould;
step 8, brushing paint in the lower sand mold and the upper sand mold;
Step 9, pouring gate is opened on the second sand box, and the second sand box cover is combined on the first sand box, so that the upper sand mould and the lower sand mould form a complete bed sand mould;
step 10, pouring liquid cast iron from a pouring gate into a sand mold;
and 11, cooling and preserving heat to the sand box in the step 10, discharging sand and taking out the bed body.
As a further improvement of the invention, a step 7.1 is also included between the step 7 and the step 8, and sand filling is carried out on the part where sand is dug out when the upper die unit or the lower die unit is dug out.
In summary, the beneficial effects of the invention are as follows: the lost foam is removed before the liquid cast iron is poured, no foam plate burns in the whole casting process, the process is environment-friendly, the cast lathe bed has no waste mixed with the foam plate after burning, the quality of the lathe bed is more stable, the lost foam is not blocked for the pouring of the liquid cast iron, the manufacturing of one lathe bed can be completed basically through one-time pouring, and the rejection rate of the lost foam is lower.
Drawings
Fig. 1 is a schematic perspective view of a first angle of the assembled invention.
Fig. 2 is a schematic perspective view of the assembled second angle of the present invention (the left connecting plate is not shown).
Fig. 3 is a schematic perspective view of the assembled third angle of the present invention (the fourth cross plate is not shown).
Fig. 4 is a schematic perspective view of a fourth angle of the assembled invention.
Fig. 5 is a longitudinal cross-sectional view reflecting the present invention.
Fig. 6 is a transverse cross-sectional view reflecting the present invention.
Detailed Description
The following description of the embodiments of the invention is further provided with reference to the accompanying drawings.
Embodiment one:
the lost foam of the bed body shown in fig. 1-6 comprises an upper die unit and a lower die unit which are made of foam plates, wherein the upper die unit and the lower die unit are divided into two parts, and the bottom of the upper die unit is placed on the top of the lower die unit, so that a complete bed body model can be assembled.
The lower die unit comprises a front vertical plate 1, a left vertical plate 2, a rear vertical plate 3, a right vertical plate 41 and a bottom plate 4, wherein the front vertical plate 1, the left vertical plate 2, the rear vertical plate 3 and the right vertical plate 41 are connected end to end and glued by glue, the front vertical plate 1 comprises a first front vertical plate unit 5 with the left end being glued to the left vertical plate 2, a second front vertical plate unit 6 with the right end being glued to the right vertical plate 41, a third front vertical plate unit 7 with the front end being glued to the right end of the first front vertical plate unit 5 and parallel to the left vertical plate 2, a fourth front vertical plate unit 8 with the front end being glued to the left end of the second front vertical plate unit 6 and parallel to the right vertical plate 41, and a fifth front vertical plate unit 9 with the two ends being glued to the rear end of the third front vertical plate unit 7 and the rear end of the fourth front vertical plate unit 8 respectively, the heights of the first front vertical plate unit 5, the second front vertical plate unit 6, the third front vertical plate unit 7, the fourth front vertical plate unit 8 and the fifth front plate unit 9 are equal, the tops of the first front vertical plate unit 5 and the second front vertical plate unit 6 are connected by a transverse connecting plate 46, the length of the transverse connecting plate 46 is equal to that of the rear vertical plate 3, the bottom plate 4 is concave, the lower surfaces of the front vertical plate 1, the left vertical plate 2, the rear vertical plate 3 and the right vertical plate 41 are adhered to the upper surface of the bottom plate 4, the left vertical plate 2 is provided with a lower left through hole 10 with front and back two rectangles, the right vertical plate 41 is provided with a lower right through hole 11 with front and back two rectangles, the upper part of the first front vertical plate unit 5 is provided with a first through hole 12 with left and right two rectangles, the upper part of the second front vertical plate unit 6 is provided with a second through hole 13 with left and right two rectangles, the third front vertical plate unit 7 and the fourth front vertical plate unit 8 are respectively provided with a third through hole 14 with a fourth through hole 15 with rectangles, the fifth front vertical plate unit 9 is provided with a rectangular fifth through hole 16, the middle part of the bottom plate 4 is upwards concave, a plurality of bottom plate through holes 17 are respectively formed in the left end and the right end of the bottom plate, and backing plates 47 are respectively adhered to the front side and the rear side of the left end and the right end of the bottom plate 4.
In the application, a left connecting plate 18 is adhered between the front vertical plate 1 and the rear vertical plate 3, the left connecting plate 18 is arranged at the left ends of the front vertical plate 1 and the rear vertical plate 3, the left surface of the left connecting plate 18 is matched with the left vertical plate 2 and is adhered by glue, the right side of the left connecting plate 18 is adhered with a first transverse plate 19, the right end of the first transverse plate 19 is inclined downwards, the rear end of the first transverse plate 19 is adhered with the front surface of the rear vertical plate 3, the right side of the first transverse plate 19 is adhered with a second transverse plate 20, a sixth through hole 21 penetrating the second transverse plate 20 is arranged on the second transverse plate 20, the rear surface of the second transverse plate 20 is adhered with the front surface of the rear vertical plate 3, the right side of the second transverse plate 20 is adhered with a third transverse plate 22, the right end of the third transverse plate 22 is inclined upwards, the rear surface of the third transverse plate 22 is adhered with the front surface of the rear vertical plate 3, the right surface of the third transverse plate 22 is adhered with a fourth transverse plate 48, the right surface of the fourth transverse plate 48 is adhered to the left surface of the right vertical plate 41, the rear surface of the fourth transverse plate 48 is adhered to the front surface of the rear vertical plate 3, the first transverse plate 19 is provided with front and rear two first reinforcing ribs 23, the lower surface of the first reinforcing rib 23 is adhered to the upper surface of the first transverse plate 19, the third transverse plate 22 is provided with front and rear two second reinforcing ribs 24, the lower surface of the second reinforcing rib 24 is adhered to the upper surface of the third transverse plate 22, the upper surfaces of the first reinforcing rib 23 and the second reinforcing rib 24 are parallel and are horizontal planes, the second transverse plate 20 is adhered with a front short plate 25, a left short plate 26, a rear short plate 27 and a right short plate 28 around the sixth through hole 21, the front short plate 25, the left short plate 26, the rear short plate 27 and the right short plate 28 are sequentially adhered in a head-tail manner, the upper ends of the front short plate 25 and the upper ends of the rear short plate 27 are inclined in opposite directions, the left short plate 26 is inclined toward the upper end of the short plate 28.
The left end upper surface of the bottom plate 4 is provided with a left vertical plate 42, the lower surface of the left vertical plate 42 is adhered to the upper surface of the bottom plate 4, the front surface and the rear surface of the left vertical plate 42 are adhered to the rear surface of the front vertical plate 1 and the front surface of the rear vertical plate 3 respectively, the upper surface of the left vertical plate 42 is provided with an inclined plane and is adhered to the lower surface of the first transverse plate 19, the bottom plate through holes 17 at the left end of the bottom plate 4 are arranged in left and right rows, each row is arranged in front and rear, the bottom of the left vertical plate 42 is adhered to the bottom plate 4 between the two rows of bottom plate through holes 17, the left through holes 43 penetrating through the two rows are formed in the left vertical plate 42, the right vertical plate 44 is adhered to the right end upper surface of the bottom plate 4 in the same manner, the upper surface of the right vertical plate 44 is an inclined plane and is adhered to the third transverse plate 22, and the right through holes 45 penetrating the two sides of the right vertical plate 44 are formed in the right vertical plate 44.
The upper die unit comprises a front supporting plate 29, a left supporting plate 30, a rear supporting plate 31 and a right supporting plate 32, wherein the front supporting plate 29, the left supporting plate 30, the rear supporting plate 31 and the right supporting plate 32 are bonded end to end, the rear ends of the left supporting plate 30 and the right supporting plate 32 are inclined downwards and have the same inclination, the left supporting plate 30 is provided with an upper left through hole 33, the right supporting plate 32 is provided with an upper right through hole 34, the front supporting plate 29 is provided with a plurality of front through holes 35 along the length direction thereof, the top ends of the front supporting plate 29, the left supporting plate 30, the rear supporting plate 31 and the right supporting plate 32 are provided with an upper transverse plate 36, the lower surfaces of the upper transverse plate 36 are respectively bonded with a plurality of upper reinforcing ribs 37, the front surfaces and the rear surfaces of the reinforcing ribs 37 are respectively bonded with the rear surfaces of the front supporting plate 29 and the front surfaces of the rear supporting plate 31, the reinforcing ribs 37 are provided with reinforcing rib through holes penetrating through the two sides of the reinforcing ribs 37, the upper transverse plate 37 is used for reinforcing the strength of the upper die unit, the upper die unit is provided with a plurality of upper reinforcing through holes 35 along the length direction thereof, the upper die body is provided with a plurality of reinforcing ribs 39, the upper reinforcing ribs are uniformly bonded with the upper transverse plates 40 along the length direction of the upper and the lower transverse plates 40, the upper and the lower transverse plates 40 are respectively bonded with the upper transverse plates 40 along the length directions of the upper and the upper transverse plates 40, and the lower transverse plates 40 are respectively parallel to the upper and lower transverse plates 40 are respectively bonded with the upper and lower longitudinal sides 40.
Embodiment two:
The technical solution of the present embodiment is a method for casting a lathe bed by using the lost foam of the lathe bed in the first embodiment, and the method of the present embodiment specifically includes the following steps:
Step 1, preparing a first sand box, a second sand box, a third sand box, a paint, liquid cast iron and sand, taking the upper surfaces of a front vertical plate 1 or a left vertical plate 2 or a rear vertical plate 3 or a right vertical plate 41 as reference surfaces, lining the spaces among the front vertical plate 1, the left vertical plate 2, the rear vertical plate 3 and the right vertical plate 41 with foam plates, enabling the filled foam plates to be positioned on the same horizontal plane with the upper surfaces of the front vertical plate 1, the left vertical plate 2, the rear vertical plate 3 and the right vertical plate 41, and because the foam plates for manufacturing the lost foam molds are soft and easy to collapse, the application uses the foam plates to level the low-lying parts of the molds, so that the upper parts of the lower mold units are as flat as the reference surfaces, and preventing the upper parts of the lower mold units from being pressed down under the gravity of the sand in the sand-blasting process of step 2.
And 2, turning over the lower die unit in the step 1, enabling the bottom of the lower die unit to face upwards, placing the lower die unit in a first sand box, keeping the placing surface of the bottom of the lower die unit horizontal, sanding and forming in the first sand box, placing a third sand box on the first sand box, sanding in the third sand box, and finishing sanding and forming of the lower die unit.
And 3, turning over the first sand box and the third sand box in the step 2 to enable the lining position of the lower die unit to face upwards, and removing the lined foam board to enable no redundant foam board to exist on the lower die unit. In this embodiment, the overturning of the first sand box can be assisted by tools such as a crane.
And 4, stacking a second sand box on the first sand box in the step 3, placing the upper die unit in the second sand box, and positioning the bottom of the upper die unit at a proper position on the top of the lower die unit to complete the assembly of the die.
And 5, sand molding is carried out in the second sand box, and sand molding of the whole die is completed.
And 6, unpacking, namely taking the second sand box off the first sand box, and enabling one side of the upper die unit to be upward, wherein one surface of each of the lower die unit in the first sand box and the upper die unit in the second sand box is exposed outside the sand, the exposed area of the outer surface of the sand is large, and the lost foam can be conveniently removed.
And 7, digging the lower die unit from the first sand box to form a lower sand mold, digging the upper die unit from the second sand box to form an upper sand mold, and moving the lower die unit and the upper die unit from the first sand box and the second sand box respectively, so that the casting is prevented from being blocked by liquid cast iron, the casting is carried out more smoothly, meanwhile, no foam is burnt when the cast iron is cast, on one hand, pollution caused by the foam burning is reduced, on the other hand, no cavity or the like caused by gas retention caused by the foam burning is formed in the cast iron, and the stability of the cast bed is improved.
And 8, brushing paint in the lower sand mold and the upper sand mold, brushing paint in the sand mold, preventing iron from being stuck together, and preventing sand sticking after drying, so that on one hand, the surface of the cast lathe bed is flat and smooth, and on the other hand, the lathe bed is convenient to remove from the sand box.
Step 9, pouring gate is opened on the second sand box, and the second sand box cover is combined on the first sand box, so that the upper sand mould and the lower sand mould form a complete bed sand mould.
And 10, pouring liquid cast iron from a pouring gate into the sand mould.
And 11, performing cooling and heat preservation treatment on the sand boxes in the step 10, then taking out sand, taking out the lathe bed, specifically lifting the second sand box by using tools such as a crane and the like, removing the sand at the upper part of the lathe bed, lifting the first sand box, and removing the sand at the lower part of the lathe bed. In consideration of the beauty of the application, the polishing and grinding treatment can be carried out on the bed body after sand discharge, and the polishing and grinding process can be basically omitted because the surface of the bed body cast by the application is smooth.
In order to reduce the problem that protrusions are arranged on the poured lathe bed caused by sand digging when the upper die unit and the lower die unit are dug, the embodiment preferably further comprises a step 7.1 between the step 7 and the step 8, and sand is filled in the sand digging position when the upper die unit or the lower die unit is dug.
The foam plate used for manufacturing the lost foam is dug out from the sand box, and then can be recycled to a factory for manufacturing the foam plate to be processed into the foam plate again for recycling, compared with the prior art, the lost foam plate is burnt out, the application is environment-friendly and good in economical efficiency, when the liquid cast iron is poured, the liquid cast iron flows from the pouring gate towards one end far away from the pouring gate, liquid cast iron is accumulated from one end far away from the pouring gate towards one end of the pouring gate, compared with the lost foam at one end far away from the pouring gate in the prior art, the liquid cast iron slowly flows to one end far away from the cast iron along with the combustion of the lost foam, when a lathe bed to be poured is large, the lost foam is likely to not burn out, and cast iron close to the pouring gate begins to solidify, so that the cast iron is failed to pour, and the application greatly improves the quality and efficiency of lathe bed casting.
Parts of the above description not specifically described are either prior art or may be implemented by prior art. Moreover, the embodiments of the present invention are described in the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Equivalent changes and modifications of the invention are intended to be within the scope of the present invention.
Claims (2)
1. The method for casting the lathe bed by using the lathe bed lost foam comprises a detachable upper die unit and a detachable lower die unit which are made of foam plates;
The lower die unit comprises a front vertical plate (1), a left vertical plate (2), a rear vertical plate (3), a right vertical plate (41) and a bottom plate (4), the front vertical plate (1), the left vertical plate (2), the rear vertical plate (3) and the right vertical plate (41) are connected end to end and glued, the front vertical plate (1) comprises a first front vertical plate unit (5) with the left end glued to the left vertical plate (2), a second front vertical plate unit (6) with the right end glued to the right vertical plate (41), a third front vertical plate unit (7) with the front end glued to the right end of the first front vertical plate unit (5) and parallel to the left vertical plate (2), a fourth front vertical plate unit (8) with the front end glued to the left end of the second front vertical plate unit (6) and parallel to the right vertical plate (41) and a fifth front vertical plate unit (9) with the two ends glued to the rear end of the third front vertical plate unit (7) and the rear end of the fourth front vertical plate unit (8) respectively, The bottom plate (4) is concave, the lower surfaces of the front vertical plate (1), the left vertical plate (2), the rear vertical plate (3) and the right vertical plate (41) are adhered to the upper surface of the bottom plate (4), the left vertical plate (2) is provided with a lower left through hole (10) with front and back two rectangles, the right vertical plate (41) is provided with a lower right through hole (11) with front and back two rectangles, the upper part of the first front vertical plate unit (5) is provided with a first through hole (12) with left and right two rectangles, the upper part of the second front vertical plate unit (6) is provided with a second through hole (13) with left and right two rectangles, the third front vertical plate unit (7) and the fourth front vertical plate unit (8) are respectively provided with a third through hole (14) and a fourth through hole (15) with rectangles, The fifth front vertical plate unit (9) is provided with a rectangular fifth through hole (16), the middle part of the bottom plate (4) is upwards concaved, a plurality of bottom plate through holes (17) are respectively formed in the left end and the right end of the bottom plate, a left connecting plate (18) is adhered between the front vertical plate (1) and the rear vertical plate (3), the left connecting plate (18) is arranged at the left ends of the front vertical plate (1) and the rear vertical plate (3), the left surface of the left connecting plate (18) is matched with the left vertical plate (2) and is adhered by glue, the right side of the left connecting plate (18) is adhered with a first transverse plate (19), the right end of the first transverse plate (19) is downwards inclined, The rear end of the first transverse plate (19) is adhered to the front surface of the rear vertical plate (3), the right side of the first transverse plate (19) is adhered to a second transverse plate (20), a sixth through hole (21) penetrating through the second transverse plate (20) is formed in the second transverse plate, the rear surface of the second transverse plate (20) is adhered to the front surface of the rear vertical plate (3), the right side of the second transverse plate (20) is adhered to a third transverse plate (22), the right end of the third transverse plate (22) is inclined upwards, the rear surface of the third transverse plate (22) is adhered to the front surface of the rear vertical plate (3), the right surface of the third transverse plate (22) is adhered to a fourth transverse plate (48), the right surface of the fourth transverse plate (48) is adhered to the left surface of the right vertical plate (41), the rear surface of the fourth transverse plate (48) is adhered to the front surface of the rear vertical plate (3), the first transverse plate (19) is provided with a front reinforcing rib (23) and a rear reinforcing rib (23), the lower surface of the first reinforcing rib (23) is adhered to the upper surface of the first transverse plate (19), the third transverse plate (22) is provided with a front reinforcing rib (24) and a rear reinforcing rib (24), the lower surface of the second reinforcing rib (24) is adhered to the upper surface of the third transverse plate (22), the upper surfaces of the first reinforcing rib (23) and the second reinforcing rib (24) are parallel and are horizontal planes, The front short plate (25), the left short plate (26), the rear short plate (27) and the right short plate (28) are adhered to the second transverse plate (20) around the sixth through hole (21), the front short plate (25), the left short plate (26), the rear short plate (27) and the right short plate (28) are adhered in sequence from head to tail, the upper end of the front short plate (25) and the upper end of the rear short plate (27) incline in opposite directions, and the left short plate (26) and the upper end of the short plate (28) incline in opposite directions;
The upper die unit comprises a front supporting plate (29), a left supporting plate (30), a rear supporting plate (31) and a right supporting plate (32), wherein the front supporting plate (29), the left supporting plate (30), the rear supporting plate (31) and the right supporting plate (32) are bonded end to end, the rear ends of the left supporting plate (30) and the right supporting plate (32) are inclined downwards and the inclination angles of the rear ends are equal, the left supporting plate (30) is provided with an upper left through hole (33), the right supporting plate (32) is provided with an upper right through hole (34), the front supporting plate (29) is provided with a plurality of front through holes (35) along the length direction thereof, the top ends of the front supporting plate (29), the left supporting plate (30), the rear supporting plate (31) and the right supporting plate (32) are provided with an upper transverse plate (36), the lower surface of the upper transverse plate (36) is bonded with a plurality of upper reinforcing ribs (37), the front surface and the rear surface of the reinforcing ribs (37) are respectively bonded with the rear surface of the front supporting plate (29) and the front surface of the rear supporting plate (31), the upper right through hole (34) is provided with a plurality of front through holes (35) along the length direction thereof, the upper transverse ribs (39) are respectively bonded on the upper transverse plates and the upper transverse plates (38), a plurality of reinforcing plates (40) are uniformly adhered between the upper sliding rail (38) and the lower sliding rail (39) along the length direction of the upper sliding rail (38), the reinforcing plates (40) are rectangular, the reinforcing plates (40) are parallel to the upper transverse plate (36), and the lower surfaces of the reinforcing plates (40) are parallel to the lower sliding rail (39);
The method is characterized in that: comprises the following steps of the method,
Step 1, using the upper surfaces of a front vertical plate (1), a left vertical plate (2), a rear vertical plate (3) or a right vertical plate (41) as reference surfaces, and using foam plates to line the spaces among the front vertical plate (1), the left vertical plate (2), the rear vertical plate (3) and the right vertical plate (41) so that the filled foam plates are positioned on the same horizontal plane with the upper surfaces of the front vertical plate (1), the left vertical plate (2), the rear vertical plate (3) and the right vertical plate (41);
step 2, turning over the lower die unit in the step 1, enabling the bottom of the lower die unit to face upwards, placing the lower die unit in a first sand box with the bottom facing upwards, sanding and molding the first sand box, placing a third sand box on the first sand box, and sanding the third sand box;
Step 3, turning over the first sand box and the third sand box in the step 2 together, enabling the lining of the lower die unit to face upwards, and removing the lined foam plate;
step 4, stacking a second sand box on the first sand box in the step 3, placing an upper die unit in the second sand box, and enabling the bottom of the upper die unit to be positioned at a proper position on the top of the lower die unit;
step 5, sanding and molding into the second sand box;
step 6, unpacking, namely removing the second sand box from the first sand box, and enabling one side of the upper die unit to be upward;
step 7, digging a lower die unit from a first sand box to form a lower sand mould, and digging an upper die unit from a second sand box to form an upper sand mould;
step 8, brushing paint in the lower sand mold and the upper sand mold;
Step 9, pouring gate is opened on the second sand box, and the second sand box cover is combined on the first sand box, so that the upper sand mould and the lower sand mould form a complete bed sand mould;
step 10, pouring liquid cast iron from a pouring gate into a sand mold;
and 11, cooling and preserving heat to the sand box in the step 10, discharging sand and taking out the bed body.
2. The method for casting a bed using a lost foam according to claim 1, wherein: and 7.1, performing sand filling on the sand-removed part when the upper die unit or the lower die unit is excavated.
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