CN102029358B - Expendable pattern for manufacturing corner fittings of container and manufacturing method and using method thereof - Google Patents
Expendable pattern for manufacturing corner fittings of container and manufacturing method and using method thereof Download PDFInfo
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- CN102029358B CN102029358B CN 201010587093 CN201010587093A CN102029358B CN 102029358 B CN102029358 B CN 102029358B CN 201010587093 CN201010587093 CN 201010587093 CN 201010587093 A CN201010587093 A CN 201010587093A CN 102029358 B CN102029358 B CN 102029358B
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Abstract
The invention provides an expendable pattern for manufacturing corner fittings of a container. The expendable pattern comprises a casting latex channel, a first expendable pattern and a second expendable pattern, wherein an expendable pattern latex channel is formed on a side external wall of the first expendable pattern; a first through hole and a plurality of grooves are formed on the first expendable pattern; a second through hole and a third through hole are formed on a wall of the second expendable pattern; a plurality of connecting bumps are formed on the second expandable pattern; the grooves and the connecting bumps are in inserted joint; the expendable pattern latex channel and the casting latex channel are in glued and fixed connection; the casting latex channel is prismatic; the connection position of the grooves and the connecting bumps is provided with gummed paper which is glued and fixed with the first expendable pattern and the second expendable pattern. The process is simple; the expandable pattern has a rational pattern structure, low cost and high production efficiency; and the produced corner fittings of the container have smooth surfaces and low casting defect rate.
Description
Technical field:
The present invention relates to the technical field of container parts and mould thereof, particularly a kind of evaporative pattern and manufacturing, using method for the manufacture of container angle.
Background technology:
Be located at the corner fittings in each bight of container in the lifting of container; carrying; fixing; pile and fasten solid the grade in the middle of the operation; all play a part key, generally say, any active force that casing bears also almost transmits by corner fittings entirely; as the outer most edge of casing, corner fittings also plays a part the protection FCL.At present, the conventional cast method of container angle is for using the sand casting, even make the mould of container angle with water-glass sand, place in the sandbox, after molten steel was poured mould and moulding into, water-glass sand was namely scrapped, and water-glass sand can't be recycled, this manufacture method, workman's labour intensity is large, and manufacturing cost is high, and environmental pollution is serious, and production efficiency is low, and a sandbox only can be cast 4 container angles.In addition, the water-glass sand mould also easily forms sand holes, the casting flaws such as pore on the surface of container angle, cause the container angle produced rough, affect the appearance quality, need again processing polishing, this has increased again manufacturing process and cost of manufacture virtually.
Compare with traditional sand casting method technology, it is good that lost foam casting has a casting quality, and dimensional accuracy is high, any surface finish, the advantage such as with low cost.Along with the development of science and technology, the evaporative pattern technology provides the means of free design space and founding superior quality project, and the lost foam casting added value is high, and have following comprehensive advantage: the foaming mould life-span is long, can produce thousands of bubble face mould samples, and the withdrawing pattern degree is little, and wall thickness is even; Casting weight can reduce about 30%; Reduce assembling and realize monoblock cast; Alleviate or eliminate casting cleaning; Machining welding and dynamic balancing measurement; Improve mechanical castings and mass color cleanliness; Improve each combination property of foundry goods characteristic etc.
So far, the evaporative pattern technology is not yet used in the making field of container angle, no matter is the manufacturing of apperance and the use of apperance, all still in exploration.For solving the problems of the technologies described above, simple in the urgent need to a kind of technique occurring, evaporative pattern mold is rational in infrastructure, and cost is low, high and the container angle smooth surface of producing of production efficiency, the casting flaw rate low for the manufacture of the evaporative pattern of container angle and manufacturing thereof, using method.
Summary of the invention:
The object of the invention is to overcome the shortcoming that exists in the prior art, provide a kind of technique simple, evaporative pattern mold is rational in infrastructure, cost is low, high and the container angle smooth surface of producing of production efficiency, the casting flaw rate low for the manufacture of the evaporative pattern of container angle and manufacturing thereof, using method.
For realizing the object of the invention, the invention provides a kind of evaporative pattern for the manufacture of container angle, comprise casting Jiao Dao, evaporative pattern one and evaporative pattern two, wherein, be provided with evaporative pattern Jiao Dao on the one side outer wall of described evaporative pattern one, be provided with the first through hole on the described evaporative pattern one, further be provided with some grooves on the described evaporative pattern one, be provided with the second through hole and third through-hole on the wall of described evaporative pattern two, further be provided with some connection bumps on the described evaporative pattern two, plug together between described groove and the described connection bump and be connected.
Described evaporative pattern Jiao Dao, described the first through hole, described groove and described evaporative pattern one are one-body molded during fabrication; Described connection bump, described the second through hole, described third through-hole and described evaporative pattern two are one-body molded during fabrication, be adhesively fixed between described evaporative pattern Jiao Dao and the described casting glue road and be connected, the prism that is shaped as of the described Jiao Dao that casts, the link position of described groove and described connection bump further is provided with gummed paper, and is gluing fixing between described gummed paper and described evaporative pattern one, the described evaporative pattern two.
Purpose to better implement the present invention, the present invention also provides a kind of manufacture method of the evaporative pattern for the manufacture of container angle, wherein, comprises the steps:
A, the suitable STMMA bead of selection: select the diameter range of bead at 0.45-0.60mm, detect moisture content and the fugitive constituent of bead;
B, pre-sending out: batch (-type) steam prefoaming machine passes through first water separator, get rid of fully the excessive moisture in the machine, then the STMMA bead is sent into batch (-type) steam prefoaming machine, the jet chimney pressure of batch (-type) steam prefoaming machine is controlled at 0.1-0.2Mpa, expanding chamber pressure is controlled at 0.03-0.03Mpa, temperature is 90-100 degree centigrade, advance time 40-60 second;
C, slaking: the slaking control time of bead is 12-48 hour, and in maturing process, the control point of fugitive constituent is 7-8%;
D, the bead after the slaking is fills up in the evaporative pattern mold, makes evaporative pattern one and evaporative pattern two behind the cooling forming;
E, enter drying shed: the evaporative pattern of first one-step forming is placed on the shelf that are provided with layering, allows evaporative pattern is omnibearing to dispel the heat, and puts into 45-55 degree centigrade drying shed after 1-3 days again;
F, synthetic evaporative pattern: the connection bump of the groove of evaporative pattern one and evaporative pattern two plugged together link together, and twine a circle gummed paper at link position, by gummed paper further with evaporative pattern one and evaporative pattern two gluing fixing.
Described steps d further comprises:
The evaporative pattern mold preheating: preheating is used for shortening the lost foam forming time, the condensed water when reducing foaming in the mold cavity;
The bead filling: filling is adopted suction filling or binder filling or is pressed and inhale filling, and bead density is controlled at 23 grams per liters during filling;
Hot briquetting: it is balanced that the evaporative pattern mold bulk temperature is risen, and when bead is heated when reaching the bead softening point, and insulation, pressurize make bead continue to expand to merge;
Cooling: want during cooling evenly, fully, avoid evaporative pattern to form three foaming,
The demoulding: adopt the tilting stripping means.
Using method for the manufacture of the evaporative pattern of container angle wherein, comprises the steps:
For container angle is coated with the step of coating,
The step of oven dry,
The step that connects Jiao Dao and the sandbox of packing into,
Bleeding makes the step of sandbox formation negative pressure,
The step of molten steel casting,
The step of the cutting behind the outlet, polishing, ball blast.
Purpose to better implement the present invention, the present invention provides again a kind of using method of the evaporative pattern for the manufacture of container angle, wherein, and the described step that is coated with coating for container angle, further comprise the step that disposes coating: be specially, dispose following raw material according to the weight fraction ratio:
Silica flour 80-85 part, cellulose 8-15 part, bentonite 1-3 part, activating agent 0.1-0.2 part, white glue with vinyl 5-8 part, water 100-150 part.
The step of configuration: first with silica flour, cellulose, bentonite and water are put in the soaking box and are fully stirred, mixing time is 30-35 minute, again activating agent and white glue with vinyl are dropped in the soaking box, fully stirred again 20-25 minute, make coating, for evaporative pattern is coated with use, when being coated with, the container angle evaporative pattern is immersed in the soaking box, soaked 5-10 minute under the normal temperature, evaporative pattern is pulled out in soaking box, meeting the part is coated with incomplete, mend brush with brush, the inwall of guaranteeing evaporative pattern all is coated with outer wall and hangs with coating, the outer wall of the Jiao Dao that casts also is coated with hangs with coating.
Described cellulose is methylcellulose, any one in hydroxyethylcellulose or the hydroxypropyl methylcellulose; Described surfactant is stearic acid, neopelex, lecithin, fatty glyceride, any one in the polysorbate; The weight fraction ratio of composition is 45 parts of vinylacetates, 5 parts of polyvinyl alcohol, 4 parts of dibutyl phthalates, 1 part of octanol, 0.1 part of ammonium persulfate, 44.9 parts in water in the described white glue with vinyl.
In the step of described oven dry, the temperature of oven dry is the 45-55 degree, and drying time is 2-3 days; In the step of described connection Jiao Dao and the sandbox of packing into, evaporative pattern Jiao Dao on the evaporative pattern is adhesively fixed and is connected with casting Jiao Dao, make the both sides of casting Jiao Dao be connected with some evaporative patterns, the casting Jiao Dao that then will connect evaporative pattern places in the sandbox, with the water-glass sand sandbox of packing into, utilize the sandbox hanger that sandbox is lifted to the compacting platform, sand is struck off compacting.
Described bleeding makes sandbox form the step of negative pressure, the aspirating hole that has buried the sandbox of evaporative pattern is connected on the aspiration pump, bled 5-15 minute, make and form negative pressure in the sandbox, cup is placed the sandbox top, the below outlet of cup links to each other with casting Jiao Dao, the step of described molten steel casting: the top that molten steel is winched to cup with crane, molten steel waters on casting Jiao Dao along cup, evaporative pattern is met molten steel and is rapidly disappeared, and the position of evaporative pattern forms cavity, and molten steel trickles in cavity, after the 15-30 that stops to cast minute, with the container angle outlet after the casting.
The step of the cutting behind the outlet, polishing, ball blast: container angle and Jiao Dao behind the outlet link together, use cutting machine that container angle is cut down successively, and in the cutting part polishing, after the polishing container angle is dropped into ball blast in the shot-blasting machine, form the container angle finished product.
The invention has the advantages that, utilize the evaporative pattern technology to make container angle, compare with conventional cast technique, the lost foam casting added value is high, and have following comprehensive advantage: the foaming mould life-span is long, can produce thousands of bubble face mould samples, the withdrawing pattern degree is little, and wall thickness is even; Casting weight can reduce about 30%; Reduce assembling and realize monoblock cast; Alleviate or eliminate casting cleaning; Machining welding and dynamic balancing measurement; Improve mechanical castings and mass color cleanliness; Improve each combination property of foundry goods characteristic.And a sandbox can be produced container angle 50-100 spare, and the production efficiency that more traditional sand casting is made container angle has improved 12.5 times-25 times.
Evaporative pattern is rational in infrastructure among the present invention, can once produce hundreds of container angle evaporative pattern one and evaporative pattern two by evaporative pattern mold, again evaporative pattern one is connected with evaporative pattern plug together connect and fixing with gummed paper after, evaporative pattern can be adhesively fixed with Jiao Dao is connected, and is coated with through coating, bury sandbox, the formation negative pressure of bleeding, cast molding is cut behind the outlet, polishing, ball blast makes finished product.Technique of the present invention is simple, and evaporative pattern mold is rational in infrastructure, and cost is low, production efficiency height and the container angle smooth surface of producing, and the casting flaw rate is low.
Description of drawings:
Fig. 1 is the schematic diagram of evaporative pattern one among the present invention.
Fig. 2 is the schematic diagram of evaporative pattern two among the present invention.
Fig. 3 is evaporative pattern and the state diagram of casting Jiao Dao after being connected among the present invention.
Fig. 4 is the side view of sandbox among the present invention.
Fig. 5 is the top view of sandbox among the present invention.
Fig. 6 is the preparation method flow chart of the evaporative pattern of container angle among the present invention.
Fig. 7 utilizes evaporative pattern to make the flow chart of the using method of container angle among the present invention.
The accompanying drawing sign:
1, groove 2, evaporative pattern glue road 3, the first through hole
4, connection bump 5, the second through hole 6, third through-hole
7, gummed paper 8, casting glue road 9, evaporative pattern
10, sandbox 11, hanger 12, aspirating hole
13, tracheae
The specific embodiment:
As depicted in figs. 1 and 2, Fig. 1 is the schematic diagram of evaporative pattern one among the present invention.Fig. 2 is the schematic diagram of evaporative pattern two among the present invention.Wherein, comprise casting glue road 8, evaporative pattern one and evaporative pattern two, be provided with evaporative pattern glue road 2 on the one side outer wall of evaporative pattern one, be provided with the first through hole 3 on the evaporative pattern one, further be provided with some grooves 1 on the evaporative pattern one, be provided with the second through hole 5 and third through-hole 6 on the wall of evaporative pattern two, further be provided with some connection bumps 4 on the evaporative pattern two, plug together between groove 1 and the connection bump 4 and be connected.Evaporative pattern glue road 2, the first through hole, groove and evaporative pattern one are one-body molded during fabrication; Connection bump 4, the second through hole 5, third through-hole 6 and evaporative pattern two are one-body molded during fabrication, be adhesively fixed between evaporative pattern glue road 2 and the casting glue road 8 and be connected, casting glue road 8 be shaped as prism, advantageous cross sections is tetragonal prism, groove 1 further is provided with gummed paper 7 with the link position of connection bump 4, and is gluing fixing between gummed paper 7 and evaporative pattern one, the evaporative pattern two.
As shown in Figure 6, Fig. 6 is the preparation method flow chart of the evaporative pattern of container angle among the present invention.Wherein, the manufacture method for the manufacture of the evaporative pattern of container angle comprises the steps:
A, the suitable STMMA bead of selection: select the diameter range of bead at 0.45-0.60mm, detect moisture content and the fugitive constituent of bead;
B, pre-sending out: batch (-type) steam prefoaming machine passes through first water separator, get rid of fully the excessive moisture in the machine, then the STMMA bead is sent into batch (-type) steam prefoaming machine, the jet chimney pressure of batch (-type) steam prefoaming machine is controlled at 0.1-0.2Mpa, expanding chamber pressure is controlled at 0.03-0.03Mpa, temperature is 90-100 degree centigrade, advance time 40-60 second;
C, slaking: the slaking control time of bead is 12-48 hour, and in maturing process, the control point of fugitive constituent is 7-8%;
D, the bead after the slaking is fills up in the evaporative pattern mold, makes evaporative pattern one and evaporative pattern two behind the cooling forming;
E, enter drying shed: the evaporative pattern of first one-step forming is placed on the shelf that are provided with layering, allows evaporative pattern is omnibearing to dispel the heat, and puts into 45-55 degree centigrade drying shed after 1-3 days again;
F, synthetic evaporative pattern: the connection bump of the groove of evaporative pattern one and evaporative pattern two plugged together link together, and twine a circle gummed paper at link position, by gummed paper further with evaporative pattern one and evaporative pattern two gluing fixing.
Manufacture method for the manufacture of the evaporative pattern of container angle is characterized in that described steps d further comprises:
The evaporative pattern mold preheating: preheating is used for shortening the lost foam forming time, the condensed water when reducing foaming in the mold cavity;
The bead filling: filling is adopted suction filling or binder filling or is pressed and inhale filling, and bead density is controlled at 23 grams per liters during filling;
Hot briquetting: it is balanced that the evaporative pattern mold bulk temperature is risen, and when bead is heated when reaching the bead softening point, and insulation, pressurize make bead continue to expand to merge;
Cooling: want during cooling evenly, fully, avoid evaporative pattern to form three foaming,
The demoulding: adopt the tilting stripping means.
Selecting bead is a vital step in evaporative pattern production, at present, there are three kinds with the product of evaporative pattern production apperance: EPS, STMMA, EPMMA, that commonly used is STMMA, STMMA is the copolymer resins bead, be mainly used in making evaporative pattern, domestic major vendor is Hangzhou Kester chemical industry Co., Ltd.STMMA is that the macromolecular polymerization reaction by polyethylene and methymethacrylate one-step method generates.The carbon increasing amount of STMMA is generally≤and 0.06%, (6 carbon are once), and the holding time is three months (quality stability also compare EPS want high), EPS and STMMA comparison sheet are as follows:
When selecting the bead granularity, need the size according to production foundry goods, wall thickness, the quality requirement etc. on surface is selected the bead granularity, is generally thick 1/10th the selecting of the thin-walled of foundry goods, such as: the foundry goods that 7mm is thin, / 10th beads of 0.7mm namely, select so STMMA-1#0.60-0.90mm, if cast(ing) surface is had relatively high expectations, can select thinner specification.The bead specification table is as follows:
| Trade mark specification | Particle size range mm |
| STMMA-1# | 0.60-.090 |
| STMMA-2# | 0.45-0.60 |
| STMMA-3A# | 0.40-0.55 |
| STMMA-3# | 0.35-0.50 |
| STMMA-4# | 0.25-0.35 |
Shrinkage factor when EPS makes white mould: 0.3-0.8%, STMMA make the shrinkage factor 0.1-0.3% that white mould is, the structure of mould is different with size, and heating temperature is also different, the difference of environment temperature during the apperance slaking, and contraction ratio is also changing.The store method of STMMA: deepfreeze (≤10 degree) or be kept at aeration-drying preferably, there is not direct sunlight, shady and cool place when opening or do not use fully, must be tightened sack again, and bung is good, to prevent the loss of pentane.
Being not only in the pre-process needs high-quality bead, also very important with a pre-equipment of fashion, in the prefoam process, need to make it softening and expansion with the Steam Heating bead, and in the whole process, the Density Distribution of foam must be controlled effectively.
The jet chimney pressure of batch (-type) steam prefoaming machine must be stablized and is controlled at 0.1-0.2Mpa (after the pressure regulation), and expanding chamber pressure is controlled at 0.03-0.03Mpa, and temperature is 90-100 degree centigrade, time 40-60 second.The water content control of steam is also particularly important, and entering the pre-front steam of equipment of sending out need to be first by water separator, the excessive moisture in the eliminating steam of composition.The specific gravity control of bead depends on the size of original bead, the thickness size of model, and according to following table, the density 20-22g/L of bead among the present invention.
| Specification limit | SEMMA-2# | SEMMA-3A# | SEMMA-3# | SEMMA-4# |
| Specific gravity range | 19-21g/L | 20-22g/L | 21-23g/L | 23-26g/L |
Before bead entered prefoaming machine, its fugitive constituent, water content detected in the most primary operating room.Reduce wasting phenomenon in the production.
The detection of moisture content only need reach≤and 1%, but fugitive constituent can be because of every lot number, not coexisting of every factor such as weather constantly changes, the quality control pickup that a redness can be arranged in each barrel of STMMA that generally dispatches from the factory, the fugitive constituent data of this batch can be described, but these data also have different the variation, need the user to detect voluntarily, to reduce quality waste and the deviation that causes owing to unstable
The data value of fugitive constituent detects≤9.5%, then will be controlled at the time about 40 seconds; 〉=9.5%, will be controlled at the time about 60 seconds.The advance time of STMMA can not surpass one minute semispecies, can consume blowing agent like this, thereby affects the effect (in not bright and clean, the model in surface the particle poor attachment in storehouse etc.) of post forming.
Slaking
Pre-expanded bead must be put into and carry out maturation process in the slaking storehouse being used for the molding sample.The bead that will distribute in advance during slaking has a stable process, the variation of bead in this stabilization process; The moisture of naturally running away recovers elasticity, improves volatile content, lays a solid foundation for producing better white mould.
In whole maturing process, can find out whether normally pre-sending out of particle by naked eyes; The general lustrous surface of good bead, circle is very pinched certain screen resilience with hand; If send out bad in advance, surface blistering, some can become ellipse, does not have elasticity, and fugitive constituent also relatively run fast especially.
The slaking control time of bead is generally 12-48 hour, and in curing process control, the control point of fugitive constituent is preferably 7-8%, to reduce the possibility of three foaming of bead after moulding.
Moulding (preheating-filling-heating-cooling-demoulding)
When volatile content mensuration reaches needed index, can say in the bead filling progressive die tool and carry out moulding.Domestic the most common moulding process has two kinds: the manual mould of digester (-tor) formula and machine mould, but main technology controlling and process program or identical.
Mould and die preheating-bead filling-hot briquetting-cooling-demoulding
1, mould and die preheating: the purpose of preheating is for shortening forming time, the condensed water when improving the quality of white mold forming and reducing foaming in the mold cavity.
2, bead filling: filling is the important procedure that apperance is made, and filling is inhomogeneous or just can not obtain high-quality and qualified white mould during consolidation.Adopt the method for filling that the suction filling is arranged, binder filling and press and inhale filling etc., present domestic employing be the suction filling, this feed way has certain drawback, adopts the mode of suction filling such as certain factory, lifts mould when reinforced,
Though bead is sent out in advance density and is controlled at about 23 grams per liters, because it is reinforced to lift mould, apperance weight is overweight, the bead fusion on apperance surface is inconsistent, and (local burning or local fusion are bad,) apperance global density inhomogeneous (owing to lift mould, apperance planar portions bit density is too high) this bring destabilizing factor for follow-up casting quality.How concrete which kind of placement method and the pressure of gas sealed in electric of adopting will be seen the mold cavity structure complexity and decide, wherein the pressure-and-suction type filling for thin-walled and structure comparatively complicated die be filled with very large effect, be conducive to the ganoid apperance of production complete sum.
3, hot briquetting: according to differences such as apperance size, structure, wall thickness, the final temperature of steam pressure and mould during the control heating, it is balanced that the mold integral temperature is risen, and avoids heating too fast mold temperature as far as possible and rise unbalanced and cause the bead melting of apperance surface to close inconsistent phenomenon.In the hot briquetting process, bead to be heated and reach the temperature of bead softening point, and be incubated.Pressurize makes bead continue the fusion of expanding.In the hot briquetting process, require can effectively control temperature, and according to apperance clinkering quality and when heating mould temperature steam pressure and heat time heating time in the die cavity when adjusting heating.Steam pressure and heat time heating time are to decide with different foaming density according to different moulds in the concrete heating-up temperature, die cavity.Can not carry condensed water secretly in the heating steam, the wall thickness of mould is wanted evenly, and breather plug is arranged and wanted rationally, otherwise affects the quality that apperance surface bead merges.
4, cooling: cold purpose of going is to make the apperance typing and have certain strength and stiffness, so cooling is wanted evenly, fully.The heat of the thermoplastic foam apperance of just moulding is by various heat transfer paths in the mould, spill in ambient air or the cooling medium, but because the apperance foam is the non-conductor of heat, usually occur the curing molding that is cooled on top layer during cooling, the temperature of core is very high phenomenon also.At this moment, inadequate such as cooling and shaping, although epidermis has cured moulding, but a large amount of waste heat amounts of core can continue to think unofficial biography, and skin temperature is gone up, and add the expansive force of apperance core foam, just may make the distortion of apperance shape or the destruction of having finalized the design, be referred to as three foaming.Will pay special attention to cooling water temperature in cooling procedure can not be too low, and hydraulic pressure can not be too large, and cool time can not be oversize, otherwise apperance and apperance surface have the phenomenon of collapsing.
5, the demoulding: inside is in decompression state after the apperance cooling of just moulding, and is softer, if the demoulding is improper, the apperance surface is with regard to easy damaged, and distortion is so will take different stripping means for the apperance of different structure.
Enter drying shed (the test volatile content also makes a record)
When one complete, after qualified apperance is made, the placement at initial stage preferably has the shelf of a layering, can allow apperance is omnibearing dispels the heat, put into again 50 degrees centigrade drying shed after 1-3 days, must the test fugitive constituent of apperance before coating and the content of moisture, the fugitive constituent detected value is necessary≤and 2%.
Fugitive constituent (bead) method of testing
Instrument: assay balance
Diameter 60*30 band ground measuring cup
Drier (putting silica gel)
Step:
1, accurately the measuring cup that dries to constant weight of city (claim accurate to 0.0001g) is designated as A
2, accurately take by weighing 1-2g bead sample (claiming accurate to 0.0001g) and be designated as B
3, this sample is placed the baking oven 1 hour of 150 degree constant temperature
4, remove to be placed on and be cooled to weighing after the room temperature in the drier, be designated as C
5, calculate: fugitive constituent %=(C-A)/B-1*100%.
A: the weight of empty bottle
B: the weight of the bead of weighing itself
C: the bottle that takes out adds the weight after bead shrinks:
The moisture content method of testing
Instrument: assay balance
Diameter 60*30 band ground measuring cup
Drier (putting silica gel)
Step:
Take by weighing sky measuring cup heavy (being accurate to 0.0001g) and be designated as A
Take by weighing 2-3g (being accurate to 0.0001g) sample, be designated as B
Sample is placed drying bottle,
24 as a child took out weighing, were designated as C
Calculate: moisture %=C-B-A/B*100%
In the evaporative pattern manufacture process, reason and the solution of evaporative pattern generation defective are as shown in the table:
Such as Fig. 3-Fig. 5 and shown in Figure 7, wherein, Fig. 3 is evaporative pattern and the state diagram of casting Jiao Dao after being connected among the present invention.Fig. 4 is the side view of sandbox among the present invention.Fig. 5 is the top view of sandbox among the present invention.Fig. 7 utilizes evaporative pattern to make the flow chart of the using method of container angle among the present invention.Wherein, the using method for the manufacture of the evaporative pattern of container angle comprises the steps:
For container angle is coated with the step of coating,
The step of oven dry,
The step that connects Jiao Dao and the sandbox of packing into,
Bleeding makes the step of sandbox formation negative pressure,
The step of molten steel casting,
The step of the cutting behind the outlet, polishing, ball blast.
For container angle is coated with the step of coating, further comprise the step that disposes coating: be specially, according to weight fraction than the following raw material of configuration:
Silica flour 80-85 part, cellulose 8-15 part, bentonite 1-3 part, activating agent 0.1-0.2 part, white glue with vinyl 5-8 part, water 100-150 part.
The step of configuration: first silica flour, cellulose, bentonite and water are put in the soaking box and fully stirred, mixing time is 30-35 minute, again activating agent and white glue with vinyl are dropped in the soaking box, fully stirred again 20-25 minute, make coating, for evaporative pattern is coated with use, when being coated with, in evaporative pattern immersion and soaking box, soaked 5-10 minute under the normal temperature, evaporative pattern is pulled out in soaking box, meeting the part is coated with incomplete, mend brush with brush, the inwall of guaranteeing evaporative pattern all is coated with outer wall and hangs with coating, the outer wall of the Jiao Dao that casts also is coated with hangs with coating.
Cellulose is methylcellulose, any one in hydroxyethylcellulose or the hydroxypropyl methylcellulose; Surfactant is stearic acid, neopelex, lecithin, fatty glyceride, any one in the polysorbate; The weight fraction ratio of composition is 45 parts of vinylacetates, 5 parts of polyvinyl alcohol, 4 parts of dibutyl phthalates, 1 part of octanol, 0.1 part of ammonium persulfate, 44.9 parts in water in the white glue with vinyl.
In the step of oven dry, the temperature of oven dry is the 45-55 degree, and drying time is 2-3 days; Connect in the step of Jiao Dao and the sandbox of packing into, evaporative pattern glue road 2 on the evaporative pattern is adhesively fixed with casting glue road 8 is connected, make the both sides in casting glue road 8 be connected with some evaporative patterns, the casting glue road 8 that then will connect evaporative pattern places in the sandbox 10, with the water-glass sand sandbox 10 of packing into, utilize the hanger 11 of sandbox 10 that it is lifted to the compacting platform, sand is struck off compacting.
Bleed and make sandbox form the step of negative pressure, the aspirating hole 12 that has buried the sandbox 10 of evaporative pattern is connected on the aspiration pump, bled 5-15 minute, be provided with many tracheaes 13 in the sandbox 10, tracheae 13 is communicated with for 12 the casees with aspirating hole, tracheae 13 is positioned at the bottom of sandbox 10, make after bleeding and form negative pressure in the sandbox, cup is placed sandbox 10 tops, the below outlet of cup links to each other with casting glue road 8, the step of described molten steel casting: molten steel is winched to the top of cup with crane, and molten steel waters on casting glue road 8 along cup, and evaporative pattern is met molten steel and rapidly disappeared, the position of evaporative pattern forms cavity, molten steel trickles in cavity, after the 15-30 that stops to cast minute, with the container angle outlet after the casting.
The step of the cutting behind the outlet, polishing, ball blast: the container angle behind the outlet links together with casting Jiao Dao (Jiao Dao that casts this moment has been metal), use cutting machine that container angle is cut down successively, and polish at cutting part, after the polishing container angle is dropped into ball blast in the shot-blasting machine, form the container angle finished product.
The conventional cast method is compared with the present invention:
In sum, it is simple to the invention provides a kind of technique, and evaporative pattern mold is rational in infrastructure, and cost is low, the high and container angle smooth surface of producing of production efficiency, the casting flaw rate low for the manufacture of the evaporative pattern of container angle and manufacturing thereof, using method.
Claims (9)
1. evaporative pattern for the manufacture of container angle, comprise casting Jiao Dao, evaporative pattern one and evaporative pattern two, it is characterized in that, be provided with evaporative pattern Jiao Dao on the one side outer wall of described evaporative pattern one, be provided with the first through hole on the described evaporative pattern one, further be provided with some grooves on the described evaporative pattern one, be provided with the second through hole and third through-hole on the wall of described evaporative pattern two, further be provided with some connection bumps on the described evaporative pattern two, plug together between described groove and the described connection bump and be connected;
Described evaporative pattern Jiao Dao, described the first through hole, described groove and described evaporative pattern one are one-body molded during fabrication; Described connection bump, described the second through hole, described third through-hole and described evaporative pattern two are one-body molded during fabrication, be adhesively fixed between described evaporative pattern Jiao Dao and the described casting glue road and be connected, the prism that is shaped as of the described Jiao Dao that casts, the link position of described groove and described connection bump further is provided with gummed paper, and is gluing fixing between described gummed paper and described evaporative pattern one, the described evaporative pattern two.
2. one kind as claimed in claim 1 for the manufacture of the manufacture method of the evaporative pattern of container angle, it is characterized in that, comprises the steps:
A, the suitable STMMA bead of selection: select the diameter range of bead at 0.45-0.60mm, detect moisture content and the fugitive constituent of bead;
B, pre-sending out: batch (-type) steam prefoaming machine passes through first water separator, get rid of fully the excessive moisture in the machine, then the STMMA bead is sent into batch (-type) steam prefoaming machine, the jet chimney pressure of batch (-type) steam prefoaming machine is controlled at 0.1-0.2Mpa, expanding chamber pressure is controlled at 0.03-0.03Mpa, temperature is 90-100 degree centigrade, advance time 40-60 second;
C, slaking: the slaking control time of bead is 12-48 hour, and in maturing process, the control point of fugitive constituent is 7-8%;
D, the bead after the slaking is fills up in the evaporative pattern mold, makes evaporative pattern one and evaporative pattern two behind the cooling forming;
E, enter drying shed: the evaporative pattern of first one-step forming is placed on the shelf that are provided with layering, allows evaporative pattern is omnibearing to dispel the heat, and puts into 45-55 degree centigrade drying shed after 1-3 days again;
F, synthetic evaporative pattern: the connection bump of the groove of evaporative pattern one and evaporative pattern two plugged together link together, and twine a circle gummed paper at link position, by gummed paper further with evaporative pattern one and evaporative pattern two gluing fixing.
3. manufacture method according to claim 2 is characterized in that, described steps d further comprises:
The evaporative pattern mold preheating: preheating is used for shortening the lost foam forming time, the condensed water when reducing foaming in the mold cavity;
The bead filling: filling is adopted suction filling or binder filling or is pressed and inhale filling, and bead density is controlled at 23 grams per liters during filling;
Hot briquetting: it is balanced that the evaporative pattern mold bulk temperature is risen, and when bead is heated when reaching the bead softening point, and insulation, pressurize make bead continue to expand to merge;
Cooling: want during cooling evenly, fully, avoid evaporative pattern to form three foaming,
The demoulding: adopt the tilting stripping means.
4. one kind as claimed in claim 1 for the manufacture of the using method of the evaporative pattern of container angle, it is characterized in that, comprises the steps:
For container angle is coated with the step of coating,
The step of oven dry,
The step that connects Jiao Dao and the sandbox of packing into,
Bleeding makes the step of sandbox formation negative pressure,
The step of molten steel casting,
The step of the cutting behind the outlet, polishing, ball blast.
5. using method according to claim 4 is characterized in that, and is described for container angle is coated with the step of coating, further comprises the step that disposes coating: be specially, according to weight fraction than the following raw material of configuration:
Silica flour 80-85 part, cellulose 8-15 part, bentonite 1-3 part, activating agent 0.1-0.2 part, white glue with vinyl 5-8 part, water 100-150 part;
The step of configuration: first with silica flour, cellulose, bentonite and water are put in the soaking box and are fully stirred, mixing time is 30-35 minute, again activating agent and white glue with vinyl are dropped in the soaking box, fully stirred again 20-25 minute, make coating, for evaporative pattern is coated with use, when being coated with, the container angle evaporative pattern is immersed in the soaking box, soaked 5-10 minute under the normal temperature, evaporative pattern is pulled out in soaking box, meeting the part is coated with incomplete, mend brush with brush, the inwall of guaranteeing evaporative pattern all is coated with outer wall and hangs with coating, the outer wall of the Jiao Dao that casts also is coated with hangs with coating.
6. using method according to claim 5 is characterized in that, described cellulose is methylcellulose, any one in hydroxyethylcellulose or the hydroxypropyl methylcellulose; Described surfactant is stearic acid, neopelex, lecithin, fatty glyceride, any one in the polysorbate; The weight fraction ratio of composition is 45 parts of vinylacetates, 5 parts of polyvinyl alcohol, 4 parts of dibutyl phthalates, 1 part of octanol, 0.1 part of ammonium persulfate, 44.9 parts in water in the described white glue with vinyl.
7. using method according to claim 4 is characterized in that, in the step of described oven dry, the temperature of oven dry is the 45-55 degree, and drying time is 2-3 days; In the step of described connection Jiao Dao and the sandbox of packing into, evaporative pattern Jiao Dao on the evaporative pattern is adhesively fixed and is connected with casting Jiao Dao, make the both sides of casting Jiao Dao be connected with some evaporative patterns, the casting Jiao Dao that then will connect evaporative pattern places in the sandbox, with the water-glass sand sandbox of packing into, utilize the sandbox hanger that sandbox is lifted to the compacting platform, sand is struck off compacting.
8. using method according to claim 4, it is characterized in that, described bleeding makes sandbox form the step of negative pressure, the aspirating hole that has buried the sandbox of evaporative pattern is connected on the aspiration pump, bled 5-15 minute, make and form negative pressure in the sandbox, cup is placed the sandbox top, and the below outlet of cup links to each other the step of described molten steel casting with casting Jiao Dao: the top that molten steel is winched to cup with crane, molten steel waters on casting Jiao Dao along cup, evaporative pattern is met molten steel and is rapidly disappeared, and the position of evaporative pattern forms cavity, and molten steel trickles in cavity, after the 15-30 that stops to cast minute, with the container angle outlet after the casting.
9. using method according to claim 4, it is characterized in that, the step of the cutting behind the outlet, polishing, ball blast: container angle and Jiao Dao behind the outlet link together, use cutting machine that container angle is cut down successively, and polish at cutting part, after the polishing container angle is dropped into ball blast in the shot-blasting machine, form the container angle finished product.
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| CN 201010587093 CN102029358B (en) | 2010-12-14 | 2010-12-14 | Expendable pattern for manufacturing corner fittings of container and manufacturing method and using method thereof |
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| CN 201010587093 CN102029358B (en) | 2010-12-14 | 2010-12-14 | Expendable pattern for manufacturing corner fittings of container and manufacturing method and using method thereof |
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