CN104550708A - Process for casting thick and large nodular cast iron valve plate - Google Patents

Process for casting thick and large nodular cast iron valve plate Download PDF

Info

Publication number
CN104550708A
CN104550708A CN201310519449.4A CN201310519449A CN104550708A CN 104550708 A CN104550708 A CN 104550708A CN 201310519449 A CN201310519449 A CN 201310519449A CN 104550708 A CN104550708 A CN 104550708A
Authority
CN
China
Prior art keywords
gate
casting
ingate
iron
sprue
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201310519449.4A
Other languages
Chinese (zh)
Inventor
刘占向
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Qili Steel Casting Co Ltd
Original Assignee
Qingdao Qili Steel Casting Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qingdao Qili Steel Casting Co Ltd filed Critical Qingdao Qili Steel Casting Co Ltd
Priority to CN201310519449.4A priority Critical patent/CN104550708A/en
Publication of CN104550708A publication Critical patent/CN104550708A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/02Sand moulds or like moulds for shaped castings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/04Influencing the temperature of the metal, e.g. by heating or cooling the mould

Abstract

The invention discloses a process for casting a thick and large nodular cast iron valve plate. The process comprises the steps of manufacturing a sample, modeling, making a core, baking, assembling molds, melting, casting, shaking out sands and cleaning. According to the method, massive direct chiller and external chiller are used on upper and lower surfaces of a casting for chilling, proper placement positions and thicknesses are selected, shrinkage cavity and shrinkage porosity of the casting can be effectively prevented, and the graphite balling state is excellent by means of quick chilling; a feeding head does not needed to be arranged, the casting is simple to clean, and the amount of molten iron is reduced by 5 percent, so that the production cost can be reduced; a semi-closed casting system is adopted, and the ingate is uniformly distributed on the periphery of the casting mold, so that the casting mold is lightly eroded, and the residue retaining effect is good; and under the action of chiller chilling, a thick large nodular cast iron part molten by a cupola furnace has excellent surface molding, does not contain residues or sands and can be used for meeting the production requirement, and the process yield is increased by 5.9 percent.

Description

The casting technique of thick large nodular cast iron valve plate
 
Technical field
The invention belongs to casting technology field, be specifically related to a kind of casting technique of thick large nodular cast iron valve plate.
 
Background technology
The casting technique of nodular cast iron valve plate roughly comprises manufacture apperance, moulding, makes the processes such as core, oven dry, mould assembly, melting, cast, in the pouring technology of current cast iron valve, the casting finished products made easily produces the phenomenon that foundry goods produces shrinkage cavity and porosity, not only casting process is more, affect production capacity, the precision of foundry goods cannot effectively be ensured simultaneously, and percent defective is higher.
 
Summary of the invention
In order to overcome the above-mentioned technical problem that prior art field exists, the object of the invention is to, provide a kind of casting technique of thick large nodular cast iron valve plate, can directly cast out cast iron valve plate foundry goods, and packing is high, processing technology thereof is simple.
The casting technique of thick large nodular cast iron valve plate provided by the invention, comprises the following steps:
(1) apperance is manufactured: with the wooden modeling sample of Korean pine;
(2) moulding, make core: apperance is placed in sandbox, running gate system is set, in sandbox, fill out resin sand by bottom running and carry out making casting mold, and utilize resin sand to make core; Described sandbox is two unpacking designs, comprise cope and drag box, cope is provided with the several piece of interlaced arrangement every sand cooling iron, drag box is provided with the bright chill of several piece of interlaced arrangement, be 1: 1 every the thickness of sand cooling iron and bright chill and casting thickness ratio, the spacing every between sand cooling iron is that 0.5-1 is doubly to the length every sand cooling iron; Spacing between bright chill is that 0.5-1 is doubly to the length of bright chill; Described running gate system is included in the symmetrically arranged cross gate in left and right on foundry goods, ingate and sprue, and cross gate and ingate, sprue are all arranged in cope, and sprue is perpendicular to face, cross gate place and be communicated with cross gate; Cross gate is curved, and the ingate described in several is uniformly distributed between foundry goods and cross gate, and is communicated with cross gate, foundry goods; Cast gate area ratio is S sprue: S ingate: S cross gate=1: 1.2-1.5: 0.8-1;
(3) oven dry, mould assembly: the removing surface of casting mold is clean, brushes twice with zirconium powder coating, guarantees the smooth surface that the bright chill in drag box is brushed; Dry casting mold and core, lower core, carries out mould assembly, improves bright chill and the surface temperature every sand cooling iron after mould assembly with warm-air drier baking;
(4) melting: use cupola melting molten iron;
(5) cast and peeling.
The casting technique of thick large nodular cast iron valve plate provided by the invention, its beneficial effect is, overcomes operation in prior art process technology more, the problem that workload is large, improves production efficiency; Avoid and produce because casting finished products easily produces foundry goods the mass defect that the phenomenon of shrinkage cavity and porosity causes, utilization rate of raw materials is high, reduces production cost; The finished product cast size cast out is accurate, without the need to machining, effectively ensure that casting quality.
 
Detailed description of the invention
Below in conjunction with an embodiment, the casting technique of thick large nodular cast iron valve plate provided by the invention is described in detail.
Embodiment
The casting technique of the thick large nodular cast iron valve plate of the present embodiment, comprises the following steps:
(1) apperance is manufactured: with the wooden modeling sample of Korean pine;
(2) moulding, make core: apperance is placed in sandbox, running gate system is set, in sandbox, fill out resin sand by bottom running and carry out making casting mold, and utilize resin sand to make core; Described sandbox is two unpacking designs, comprise cope and drag box, cope is provided with the several piece of interlaced arrangement every sand cooling iron, drag box is provided with the bright chill of several piece of interlaced arrangement, be 1: 1 every the thickness of sand cooling iron and bright chill and casting thickness ratio, the spacing every between sand cooling iron be 0.7 times to the length every sand cooling iron; Spacing between bright chill be 0.6 times to the length of bright chill; Described running gate system is included in the symmetrically arranged cross gate in left and right on foundry goods, ingate and sprue, and cross gate and ingate, sprue are all arranged in cope, and sprue is perpendicular to face, cross gate place and be communicated with cross gate; Cross gate is curved, and the ingate described in several is uniformly distributed between foundry goods and cross gate, and is communicated with cross gate, foundry goods; Cast gate area ratio is S sprue: S ingate: S cross gate=1: 1.3: 0.85;
(3) oven dry, mould assembly: the removing surface of casting mold is clean, brushes twice with zirconium powder coating, guarantees the smooth surface that the bright chill in drag box is brushed; Dry casting mold and core, lower core, carries out mould assembly, improves bright chill and the surface temperature every sand cooling iron after mould assembly with warm-air drier baking;
(4) melting: use cupola melting molten iron;
(5) cast and peeling.

Claims (1)

1. a casting technique for thick large nodular cast iron valve plate, is characterized in that: comprise the following steps:
(1) apperance is manufactured: with the wooden modeling sample of Korean pine;
(2) moulding, make core: apperance is placed in sandbox, running gate system is set, in sandbox, fill out resin sand by bottom running and carry out making casting mold, and utilize resin sand to make core; Described sandbox is two unpacking designs, comprise cope and drag box, cope is provided with the several piece of interlaced arrangement every sand cooling iron, drag box is provided with the bright chill of several piece of interlaced arrangement, be 1: 1 every the thickness of sand cooling iron and bright chill and casting thickness ratio, the spacing every between sand cooling iron is that 0.5-1 is doubly to the length every sand cooling iron; Spacing between bright chill is that 0.5-1 is doubly to the length of bright chill; Described running gate system is included in the symmetrically arranged cross gate in left and right on foundry goods, ingate and sprue, and cross gate and ingate, sprue are all arranged in cope, and sprue is perpendicular to face, cross gate place and be communicated with cross gate; Cross gate is curved, and the ingate described in several is uniformly distributed between foundry goods and cross gate, and is communicated with cross gate, foundry goods; Cast gate area ratio is S sprue: S ingate: S cross gate=1: 1.2-1.5: 0.8-1;
(3) oven dry, mould assembly: the removing surface of casting mold is clean, brushes twice with zirconium powder coating, guarantees the smooth surface that the bright chill in drag box is brushed; Dry casting mold and core, lower core, carries out mould assembly, improves bright chill and the surface temperature every sand cooling iron after mould assembly with warm-air drier baking;
(4) melting: use cupola melting molten iron;
(5) cast and peeling.
CN201310519449.4A 2013-10-29 2013-10-29 Process for casting thick and large nodular cast iron valve plate Pending CN104550708A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310519449.4A CN104550708A (en) 2013-10-29 2013-10-29 Process for casting thick and large nodular cast iron valve plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310519449.4A CN104550708A (en) 2013-10-29 2013-10-29 Process for casting thick and large nodular cast iron valve plate

Publications (1)

Publication Number Publication Date
CN104550708A true CN104550708A (en) 2015-04-29

Family

ID=53068371

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310519449.4A Pending CN104550708A (en) 2013-10-29 2013-10-29 Process for casting thick and large nodular cast iron valve plate

Country Status (1)

Country Link
CN (1) CN104550708A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105033177A (en) * 2015-07-30 2015-11-11 益阳金沙重型机械制造有限公司 Anti-deformation casting technique for large panel steel casts
CN109277526A (en) * 2018-11-07 2019-01-29 阜新力达钢铁铸造有限公司 The casting method of heavy-section ductile iron die-casting machine
CN109773132A (en) * 2019-03-04 2019-05-21 广东中天创展球铁有限公司 A kind of cast condition ductile iron mill and its running gate system and production technology

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105033177A (en) * 2015-07-30 2015-11-11 益阳金沙重型机械制造有限公司 Anti-deformation casting technique for large panel steel casts
CN109277526A (en) * 2018-11-07 2019-01-29 阜新力达钢铁铸造有限公司 The casting method of heavy-section ductile iron die-casting machine
CN109277526B (en) * 2018-11-07 2020-09-18 阜新力达钢铁铸造有限公司 Casting method of die casting machine template for thick and large-section ductile iron
CN109773132A (en) * 2019-03-04 2019-05-21 广东中天创展球铁有限公司 A kind of cast condition ductile iron mill and its running gate system and production technology

Similar Documents

Publication Publication Date Title
CN102921902B (en) Composite shaping technique method of iron pattern coated sand and iron type core assembly
CN103447463A (en) Method for improving finished product rate of evaporated pattern casting of holes and inner cavities
CN107716872A (en) A kind of casting method of large-scale working ways
CN205437048U (en) Triple offset butterfly valve valve body casting mould
CN103084541A (en) Forming technology of air cylinder cover casting
CN103381470A (en) One-box eight-mould brake disc casting device
CN104550708A (en) Process for casting thick and large nodular cast iron valve plate
CN105364010A (en) Evaporative pattern casting process preventing deformation
CN102672113A (en) Method for pouring copper alloy neck mould of glass mould by using single resin sand box
CN206898321U (en) A kind of stacked box device
CN104043784A (en) Overflow valve casting mold and casting technique
CN103084546B (en) A kind of pouring procedure of valve gap foundry goods
CN104741543A (en) Technological method for casting tooth-shaped part
CN104607601A (en) Pump body casting process
CN104607594A (en) Casting production technology of alloy spring seat
CN107779649A (en) A kind of preparation method of aluminium bronze composite casting valve plate
CN103100663A (en) Method for eliminating lost foam cast shrinkage crack defects of screw conveyor products
CN102909348A (en) Process for casting gearbox body of centrifugal compressor
CN104607599A (en) Ultrasonic test block casting production process
CN104550742A (en) Casting production method for brake disc
CN103658519A (en) Soft sealing gate valve lost foam and pouring method thereof
CN109807285A (en) A kind of die cast method
CN104338909A (en) Wheel hub casting molding process
CN101733362A (en) Method for casting metallic mold
CN103949581A (en) Production method of automobile brake disc

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20150429