CN106541082A - It is metallurgical to use furnace charge material frame casting technique - Google Patents

It is metallurgical to use furnace charge material frame casting technique Download PDF

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Publication number
CN106541082A
CN106541082A CN201510590407.9A CN201510590407A CN106541082A CN 106541082 A CN106541082 A CN 106541082A CN 201510590407 A CN201510590407 A CN 201510590407A CN 106541082 A CN106541082 A CN 106541082A
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China
Prior art keywords
casting
sand
coating
cooling
foaming
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Pending
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CN201510590407.9A
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Chinese (zh)
Inventor
王兴雷
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QINGDAO NPA INDUSTRY Co Ltd
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QINGDAO NPA INDUSTRY Co Ltd
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Priority to CN201510590407.9A priority Critical patent/CN106541082A/en
Publication of CN106541082A publication Critical patent/CN106541082A/en
Pending legal-status Critical Current

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Abstract

The invention discloses one kind is metallurgical to use furnace charge material frame casting technique, its processing step is as follows:(1)Foaming plastic bead makes and apperance shaping foaming:Using EPS beads, its making step is prefoam --- curing --- foaming, cooling and mould unloading;(2)Model is combined(Bonding)Cluster:Bubble moulding model is combined with material frame model and is bonded together;(3)Mould coatings:Model group being coated with coating, being applied 2~3 times, coating layer thickness is made for 1~2mm, coating is dried at 45~50 DEG C;(4)Vibration molding, back-up sand:Its operation includes that casting bed prepare-places EPS model-back-up sands-sealing sizing;(5)Cast displacement:Using slow speed, and continuously pour into a mould, pour termination of pumping after rear casting mold vacuum is maintained 4~5 minutes, pouring temperature is higher than the temperature of sand casting 30~50 DEG C;(6)Cooling cleaning, knockout:After cooling, foundry goods, foundry goods and dry sand natural separation are directly hung out from sandbox.

Description

It is metallurgical to use furnace charge material frame casting technique
Technical field
The invention belongs to casting field, and in particular to a kind of metallurgical with furnace charge material frame casting technique.
Background technology
Material frame is widely used in heat treatment industry industrial furnace, is mainly used in the carburizing of boiler, and general work temperature is 900 °~1050 °.The service life and reliability of operation of material frame plays vital effect, so than more elegant in material and design structure.But the metallurgical service life with furnace charge material frame is shorter at present, easy dilatation, and stability is not high.
The content of the invention
For the drawbacks described above for overcoming prior art to exist, it is an object of the present invention to provide a kind of metallurgical with furnace charge material frame casting technique, material frame high temperature resistant, corrosion-resistant, wear-resistant can be made, material frame matrix is finer and close, and antioxygenic property is higher, and improves the reliability of material frame, stability.
The metallurgy furnace charge material frame casting technique that the present invention is provided, its processing step are as follows:
(1)Foaming plastic bead makes and apperance shaping foaming:Using expandable polystyrene bead(EPS beads), its making step be prefoam --- curing --- foaming, cooling and mould unloading, 1. prefoam:Using vacuum pre expansion;2. cure:EPS beads are placed on into certain hour in the feed bin of dry, ventilation again, to make extraneous pressure balance in bead abscess, are made bead that there is elasticity and reflation ability, is removed the moisture of surface of beads, the curing time was at 10~48 hours;3. foaming, cooling and mould unloading:By prefoam and cure EPS beads be filled in the die cavity of metal die, heating, make bead reexpand, fill up the space between bead, and make mutually to merge between bead, form smooth surface, i.e. model, must be cooled down before depanning, model is cooled to below softening temperature, after model hardening setting, could depanning;
(2)Model is combined(Bonding)Cluster:The bubble moulding model for processing is combined with material frame model and is bonded together, form model cluster, the binding material for using:Rubber latex, resin solvent and PUR and adhesive tape;
(3)Mould coatings:Bubble moulding model surface need to apply one layer of certain thickness coating, form casting mold inner casing, by paint specially for disappearing cast mold, add water in mould wash mixer stirring so as to obtains suitable viscosity, and the coating after stirring is put in container, model group is coated with leaching, brush, the method drenched and spray, applying 2~3 times, coating layer thickness being made for 1~2mm, coating is dried at 45~50 DEG C;
(4)Vibration molding, back-up sand:Its operation includes prepared by casting bed --- places EPS models --- back-up sand --- sealing sizing, 1. prepared by casting bed:Sandbox with aspirating chamber is put on a vibration table, and clamping, bottom is put into certain thickness bed load(General casting bed thickness is in 60~more than 100mm), vibration ramming;2. EPS models are placed:After jolt ramming, EPS model groups are placed by technological requirement, and train sand and fixed;3. back-up sand:Dry sand is added, while imposing vibration(Tri- directions of X, Y, Z), generally 30~60 seconds time, each position of molding sand full of model is made, and increases the bulk density of molding sand;4. sealing sizing:Sandbox surface is sealed with plastic sheeting, will be pumped into certain vacuum with vavuum pump, be "bonded" together sand grains by difference of the atmospheric pressure with pressure in casting mold in sandbox, maintains casting-up process not disintegration;
(5)Cast displacement:General 80 DEG C or so the softenings of EPS models, decompose when 430~480 DEG C, and pouring operation process is using slow-fast-slow, and keep continuous cast, prevent casting process from stopping, pour termination of pumping after rear casting mold vacuum is maintained 4~5 minutes, pouring temperature is higher than the temperature of sand casting 30~50 DEG C;
(6)Cooling cleaning, knockout:After cooling, sandbox is inclined and is hung out foundry goods or foundry goods, foundry goods and dry sand natural separation is directly hung out from sandbox, the dry sand isolated is reused after processing.
The metallurgy furnace charge material frame casting technique that the present invention is provided, its advantage is to extend the service life of material frame, unsuitable dilatation, and safe and reliable, temperature-controlled precision is high, and temperature uniformity is strong, and alleviates cost to a certain extent.
Specific embodiment
With reference to one embodiment, the metallurgy furnace charge material frame casting technique that the present invention is provided is described in detail.
Embodiment
The metallurgy of the present embodiment furnace charge material frame casting technique, its processing step are as follows:
(1)Foaming plastic bead makes and apperance shaping foaming:Using expandable polystyrene bead(EPS beads), its making step is prefoam --- curing --- foaming, cooling and mould unloading;
(2)Model is combined(Bonding)Cluster:The bubble moulding model for processing is combined with material frame model and is bonded together, form model cluster, the binding material for using:Rubber latex, resin solvent and PUR and adhesive tape;
(3)Mould coatings:Bubble moulding model surface must apply one layer of certain thickness coating, form casting mold inner casing, by paint specially for disappearing cast mold, add water in mould wash mixer stirring so as to obtains suitable viscosity, and the coating after stirring is put in container, model group is coated with leaching, brush, the method drenched and spray, applying 2~3 times, coating layer thickness being made for 1~2mm, coating is dried at 45~50 DEG C;
(4)Vibration molding, back-up sand:Its operation includes prepared by casting bed --- places EPS models --- back-up sand --- sealing sizing;
(5)Cast displacement:General 80 DEG C or so the softenings of EPS models, decompose when 430~480 DEG C, and pouring operation process is using slow-fast-slow, and keep continuous cast, prevent casting process from stopping, pour termination of pumping after rear casting mold vacuum is maintained 4~5 minutes, pouring temperature is higher than the temperature of sand casting 30~50 DEG C;
(6)Cooling cleaning, knockout:After cooling, sandbox is inclined and is hung out foundry goods or foundry goods, foundry goods and dry sand natural separation is directly hung out from sandbox, the dry sand isolated is reused after processing.

Claims (1)

1. a kind of metallurgical with furnace charge material frame casting technique, it is characterised in that:Its processing step is as follows:
(1)Foaming plastic bead makes and apperance shaping foaming:Using expandable polystyrene bead(EPS beads), its making step is prefoam --- curing --- foaming, cooling and mould unloading;
(2)Model is combined(Bonding)Cluster:The bubble moulding model for processing is combined with material frame model and is bonded together, form model cluster, the binding material for using:Rubber latex, resin solvent and PUR and adhesive tape;
(3)Mould coatings:Bubble moulding model surface must apply one layer of certain thickness coating, form casting mold inner casing, by paint specially for disappearing cast mold, add water in mould wash mixer stirring so as to obtains suitable viscosity, and the coating after stirring is put in container, model group is coated with leaching, brush, the method drenched and spray, applying 2~3 times, coating layer thickness being made for 1~2mm, coating is dried at 45~50 DEG C;
(4)Vibration molding, back-up sand:Its operation includes prepared by casting bed --- places EPS models --- back-up sand --- sealing sizing;
(5)Cast displacement:General 80 DEG C or so the softenings of EPS models, decompose when 430~480 DEG C, and pouring operation process is using slow-fast-slow, and keep continuous cast, prevent casting process from stopping, pour termination of pumping after rear casting mold vacuum is maintained 4~5 minutes, pouring temperature is higher than the temperature of sand casting 30~50 DEG C;
(6)Cooling cleaning, knockout:After cooling, sandbox is inclined and is hung out foundry goods or foundry goods, foundry goods and dry sand natural separation is directly hung out from sandbox, the dry sand isolated is reused after processing.
CN201510590407.9A 2015-09-17 2015-09-17 It is metallurgical to use furnace charge material frame casting technique Pending CN106541082A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510590407.9A CN106541082A (en) 2015-09-17 2015-09-17 It is metallurgical to use furnace charge material frame casting technique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510590407.9A CN106541082A (en) 2015-09-17 2015-09-17 It is metallurgical to use furnace charge material frame casting technique

Publications (1)

Publication Number Publication Date
CN106541082A true CN106541082A (en) 2017-03-29

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CN201510590407.9A Pending CN106541082A (en) 2015-09-17 2015-09-17 It is metallurgical to use furnace charge material frame casting technique

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108262446A (en) * 2018-04-10 2018-07-10 马鞍山市麦立机械制造有限公司 A kind of production technology of the guiding frame based on cavityless casting
CN111618240A (en) * 2020-04-27 2020-09-04 遂昌县鑫鼎特种铸造有限公司 Casting equipment and casting process of high-strength casting

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108262446A (en) * 2018-04-10 2018-07-10 马鞍山市麦立机械制造有限公司 A kind of production technology of the guiding frame based on cavityless casting
CN111618240A (en) * 2020-04-27 2020-09-04 遂昌县鑫鼎特种铸造有限公司 Casting equipment and casting process of high-strength casting

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Application publication date: 20170329