CN102962397B - A kind of circular cone sand making machine crushing wall casting moulds and casting technique - Google Patents

A kind of circular cone sand making machine crushing wall casting moulds and casting technique Download PDF

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Publication number
CN102962397B
CN102962397B CN201210432189.2A CN201210432189A CN102962397B CN 102962397 B CN102962397 B CN 102962397B CN 201210432189 A CN201210432189 A CN 201210432189A CN 102962397 B CN102962397 B CN 102962397B
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crushing wall
rising head
casting
cast
mold cavity
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CN102962397A (en
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胡祖尧
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Zhejiang Shuangjin Machinery Group Co Ltd
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Zhejiang Shuangjin Machinery Group Co Ltd
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Abstract

The present invention relates to a kind of can acquisition in the casting shrinkage process of circular cone sand making machine crushing wall there is no shrinkage cavity and effectively can improve the high a kind of circular cone sand making machine crushing wall casting moulds of casting compactness and casting technique, in sandbox, the height of crushing wall shaping mold cavity is less than cast riser height or shaping mold cavity volume is less than cast rising head volume, rich chromium cast iron is poured in crushing wall shaping mold cavity and cast rising head, then sandbox is hung onto on dither platform and carry out dither, the rich chromium cast iron crushing wall that packing is high after cooling, can be obtained.Advantage: one is the wearability that effectively improve rich chromium cast iron crushing wall, greatly reduces sand cost processed; Two is that feeding effect is good, and casting compactness is high, avoids the generation of disrepair phenomenon; Three are wearabilities, impact resistance and improve nearly 5 times service life, achieve beyond thought technique effect.

Description

A kind of circular cone sand making machine crushing wall casting moulds and casting technique
Technical field
The present invention relates to a kind of can acquisition in the casting shrinkage process of circular cone sand making machine crushing wall there is no shrinkage cavity and effectively can improve the high a kind of circular cone sand making machine crushing wall casting moulds of casting compactness and casting technique, belong to casting field.
Background technology
CN102380579A, title " casting method of a kind of crushing wall or rolled mortar wall ", comprise the steps: 1) prepare metal mold: according to the inside and outside metal mold shape of cast shape design, reserve during design and cover sand and allowance, adopt common straightcarbon steel moulding, shaping by machine-tooled method; 2) sand is covered in preparation: cover sand and be made up of following raw material by weight, normal sand 80-90 part, imvite 3-5 part, convex Attapulgite 2-3 part, iron oxide 1-2 part, water 3-5 part, mixes above-mentioned raw materials; 3) metal type sand-covering: by step 2) prepare cover sand uniform application in step 1) mo(U)ld face prepared, smearing thickness is 5-8mm, then by stand-by 60-80 DEG C of oven dry for the metal mold covering sand; 4) smelting and pouring: the composition design preparing the steel of crushing wall or rolled mortar wall is as follows: C1.3-1.8%, Si2.5-3.5%, Mn1.8-3.0%, B2.3-2.8%, Cr1.2-2.0%, surplus is iron and inevitable impurity; Smelting technology is for put into smelting furnace melt steel scrap, the pig iron, foundry returns, then ferrosilicon, ferromanganese, ferro-boron and ferrochrome adjusting component is added to above-mentioned scope, then skim, leave standstill after homogenising 15-20 minute, adjustment pouring temperature to 1460-1480 DEG C, and is poured into step 3) in the casting mold prepared; 5) cooling and post processing: air-cooled to less than 300 DEG C knockout removing from moulds after cast, obtains foundry goods blank after sand removal, grinding process.
CN101954456A, title " manufacture method for the metal mold that gyratory crusher manganese steel crushing wall or rolled mortar wall are cast ", (1) according to breaking wall of spindle breaker or the different size specification model of rolled mortar wall, the natural pattern of crushing wall or rolled mortar wall is manufactured; (2) metal mold and the outer metal mold of nearly shape in corresponding wall thickness, integrally-built nearly shape is manufactured and designed respectively according to the shape of natural pattern; (3) in closely, metal mold and nearly outer metal mold lay flaring steam vent; (4) nearly interior metal mold and nearly outer metal mold, natural pattern are assemblied on mold(ing) board, reserved die cavity.
CN101954458A, title " manufacture method of inside and outside metal type sand-covering casting breaking wall of spindle breaker or rolled mortar wall running gate system ", (1) according to breaking wall of spindle breaker or the different size specification model of rolled mortar wall, select bottom pour ladle bag bore dia, i.e. sprue brick aperture; (2) pouring basin funnel brick, sprue cast tube brick, shunting centre runner brick, cross gate runner brick, bend pipe reducing ingate brick is manufactured and designed respectively according to sprue brick aperture; (3) bottom board is manufactured and designed; (4) by shunting centre runner brick, cross gate runner brick, bend pipe reducing ingate brick, be assembled on bottom board by technological requirement; (5) sprue cast tube brick is assembled on the centre runner brick of shunting; (6) respectively the outer metal mold and interior metal mold of having covered molding sand are assembled to and install on the bottom board of running gate system, buckle the top box being provided with rising head, and be tightened to an overall casting mold; (7) pouring basin funnel brick is assembled to sprue cast tube brick upper end, and fixation; (8) with the cast of manganese steel liquid, insulation cooling, peeling, namely obtains crushing wall or rolled mortar wall foundry goods.
CN101954457A, title " manufacture method of inside and outside metal type sand-covering casting manganese steel crushing wall or rolled mortar wall heat preservation knock-off head ", (1) Design calcu-lation of rising head: the design feature and the main thermal center calculating rising head effective compencation distance that according to crushing wall or rolled mortar wall are the more even annular enclosed foundry goods of wall thickness, determines the quantity of rising head, shape, size and installation position; (2) each constituent element of heat preservation rising head is manufactured and designed respectively: designing mould manufactures heat preservation rising head the first half riser buss respectively; Manufacture and design heat preservation rising head the latter half torticollis rising head cover for seat; Manufacture and design heat preservation riser pad; (3) assemble heat preservation riser buss each constituent element: metal mold in manufacturing, outer metal mold and interior metal type sand-covering layer, outer metal type sand-covering layer time, cameron core, torticollis rising head cover for seat are assemblied in together on interior metal type sand-covering layer, and flush with metal mold die joint; When manufacturing top box, heat preservation riser buss the first half is aimed at torticollis rising head cover for seat, then fill out molding sand and fix, overall molding after the sclerosis of top box molding sand; (4) will cover the outer metal mold of molding sand and cover molding sand and metal mold in torticollis rising head cover for seat is installed and to be assemblied on bottom board and fastening; Buckle the top box being provided with heat preservation riser buss the first half, and be tightened to an overall casting mold with inside and outside metal mold, then namely pourable, clash into disconnected rising head again after unpacking.
The common Shortcomings part of above-mentioned background technology: one is wear no resistance, causes broken cost to remain high; Two is that feeding effect is bad, and casting compactness is poor, very easily produces breakage.
Summary of the invention
Purpose of design: avoid the weak point in background technology, designing a kind of can acquisition in the casting shrinkage process of circular cone sand making machine crushing wall does not have shrinkage cavity and effectively can improve the high a kind of circular cone sand making machine crushing wall casting moulds of casting compactness and casting technique.
Design: in order to realize above-mentioned purpose of design.1, in sandbox, the height of crushing wall shaping mold cavity is less than the design that cast riser height or shaping mold cavity volume be less than cast rising head volume, is one of technical characteristic of the present invention.The object done like this is: in casting mold, the die cavity of rising head is the cavity of storage liquid metal, the supply metal when foundry goods is formed, there is the effect preventing shrinkage cavity and porosity, exhaust and collection slag, and the Main Function of rising head compensates the liquid contraction of molten metal in die cavity and the contraction in casting solidification process, to obtain the sound casting not having shrinkage cavity.Because when foundry goods cools in casting mold, the thinnest position is first solidified, and its contraction can by neighbouring thicker partial-compensation; Thicker is divided when solidifying, and can be compensated again by thick; When thick solidifies, as can not get external compensation, this place will form large shrinkage cavity.In this case, the effect of rising head will compensate the part of foundry goods final set exactly, so top or the side at the thickest position of foundry goods will be placed in, and it solidify the thick that requirement is later than foundry goods; Secondly, the density height of foundry goods depends on the distribution of rich chromium cast iron metallographic structure, the application adopts rising head to add the mode of the Nature pressurization, not only avoid the generation of shrinkage cavity and porosity situation in high chromium crushing wall foundry goods, and making the density of high chromium crushing wall foundry goods obtain the raising of essence, wear resistence and resistance to impact improve greatly.2, the sandbox of cast rich chromium cast iron being hung onto design dither platform carrying out dither, is technical characteristic two of the present invention.The object done like this is: mutually collide smash because dither crystallization cast can make crystal grain that crystal grain occurs in growth course, make
Generation recrystallization, smash again, recrystallization and reach grain refinement, and vibration is when making crystal grain collide fragmentation, too increase the chance that crystal grain peels off from type wall, so not only can make the gas in liquid metals, impurity discharges effectively, but also the metallographic structure of rich chromium cast iron can be made to distribute more reasonable, density is higher, wearability and anti-impact force higher.The application is in actual destructive testing, and wearability and the impact resistance of its shaping rear high-chromium casting improve more than five times, improve nearly 5 times service life, achieve beyond thought technique effect.3, pouring into a mould the design that rising head one circle is provided with multi-disc rising head partition, is technical characteristic three of the present invention.The object done like this is: large by this rising head volume, if if do not adopt rising head partition rising head to be divided into many blocks, then complete high-chromium casting---after the cast of crushing wall, be not only difficult to rising head to cut away, and cut by force and then affect high-chromium casting inherent quality; If adopt rising head partition rising head to be divided into many blocks, then completing high-chromium casting---after the cast of crushing wall, can easily rising head be cut away from foundry goods.
Technical scheme 1: a kind of circular cone sand making machine crushing wall casting moulds casting technique, in sandbox, the height of crushing wall shaping mold cavity is less than cast riser height or shaping mold cavity volume is less than cast rising head volume, rich chromium cast iron is poured in crushing wall shaping mold cavity and cast rising head, then sandbox is hung onto on dither platform and carry out dither, the rich chromium cast iron crushing wall that packing is high after cooling, can be obtained.
Technical scheme 2: a kind of dither platform for the vibration moulding of circular cone sand making machine crushing wall casting moulds, rectangle support corner is equipped with one or more stage clip respectively, stage clip is equipped with pressure-bearing shaking platform, dither to be positioned in the middle part of the pressure-bearing shaking platform back side and to drive pressure-bearing shaking platform dither.
Technical scheme 3: a kind of circular cone sand making machine crushing wall casting moulds, comprises sandbox, in sandbox, the height of crushing wall shaping mold cavity is less than cast riser height or shaping mold cavity volume is less than cast rising head volume, and cast rising head one circle is provided with multi-disc rising head partition.
The present invention is compared with background technology, and one is the wearability that effectively improve rich chromium cast iron crushing wall, greatly reduces sand cost processed; Two is that feeding effect is good, and casting compactness is high, avoids the generation of disrepair phenomenon; Three are wearabilities, impact resistance and improve nearly 5 times service life, achieve beyond thought technique effect.
Accompanying drawing explanation
Fig. 1 is circular cone sand making machine crushing wall casting moulds structural representation.
Fig. 2 is circular cone sand making machine crushing wall casting moulds plan structure schematic diagram.
Fig. 3 is the dither platform schematic diagram for circular cone sand making machine crushing wall casting moulds.
Detailed description of the invention
Embodiment 1: with reference to accompanying drawing 1-3.A kind of circular cone sand making machine crushing wall casting moulds casting technique, in sandbox 1, the height of crushing wall shaping mold cavity 2 is less than cast rising head 3 height or shaping mold cavity 2 volume is less than cast rising head 3 volume, or the weight of described rich chromium cast iron crushing wall is less than the weight of cast rising head, rich chromium cast iron is poured in crushing wall shaping mold cavity 2 and cast rising head 3, then sandbox 1 is hung onto on dither platform and carry out dither, the rich chromium cast iron crushing wall that packing is high after cooling, can be obtained.Described crushing wall shaping mold cavity 2 inner and outer wall is equipped with the built-in chill of polylith 4 and external chill 5, and chill 4 and 5 is uniform.Described cast rising head 3 one circle is provided with multi-disc rising head partition 6; Described cast rising head 3 is provided with many cross gates 7.The vibration frequency of described dither platform is greater than 2000Hz/min, and amplitude is less than 1.3mm, and can regulate arbitrarily as required within the scope of it, and time of vibration is fixed according to the size of foundry goods, is generally greater than 10mim, is less than 30mim.
Embodiment 2: with reference to accompanying drawing 3.A kind of dither platform for circular cone sand making machine crushing wall casting moulds, rectangle support 101 4 jiaos is equipped with one or more stage clip 103 respectively, stage clip 103 is equipped with pressure-bearing shaking platform 104, dither 106 to be positioned in the middle part of pressure-bearing shaking platform 104 back side and to drive pressure-bearing shaking platform dither.Described stage clip 103 lower surface is equipped with pressing plate 102.Described pressure-bearing shaking platform 104 bedplate surface corner is provided with dihedral baffle plate 105.Described pressure-bearing shaking platform 104 is made up of platen 109, riser 108 and corner spring top board 107, and riser 108 is vertically welded on platen 109 back side, and corner spring top board 107 is welded on platen 109 4 jiaos by riser.
Embodiment 3: with reference to accompanying drawing 1.A kind of circular cone sand making machine crushing wall casting moulds, comprises sandbox 1, and in sandbox 1, the height of crushing wall shaping mold cavity 2 is less than cast rising head 3 height or shaping mold cavity 2 volume is less than cast rising head 3 volume, and cast rising head 3 one circle is provided with multi-disc rising head partition 6.Described crushing wall shaping mold cavity 2 inner and outer wall is equipped with the built-in chill of polylith 4 and external chill 5.Described cast rising head 3 is provided with many cross gates 7.
It is to be understood that: although above-described embodiment to be contrasted detailed text description to mentality of designing of the present invention; but these text descriptions; just the simple text of mentality of designing of the present invention is described; instead of the restriction to mentality of designing of the present invention; any do not exceed mentality of designing of the present invention combination, increase or amendment, all fall within the scope of protection of the present invention.

Claims (3)

1. a circular cone sand making machine crushing wall casting moulds casting technique, it is characterized in that: the height of the middle crushing wall shaping mold cavity (2) of sandbox (1) is less than cast rising head (3) height or shaping mold cavity (2) volume is less than cast rising head (3) volume, cast rising head (3) circle is provided with multi-disc rising head partition (6), rich chromium cast iron is poured in crushing wall shaping mold cavity (2) and cast rising head (3), the weight of rich chromium cast iron crushing wall is less than the weight of cast rising head, then sandbox (1) is hung onto on dither platform and carry out dither, the rich chromium cast iron crushing wall that packing is high can be obtained after cooling.
2. a circular cone sand making machine crushing wall casting moulds, comprise sandbox (1), it is characterized in that: the height of the middle crushing wall shaping mold cavity (2) of sandbox (1) is less than cast rising head (3) height or shaping mold cavity (2) volume is less than cast rising head (3) volume, cast rising head (3) circle is provided with multi-disc rising head partition (6), and cast rising head (3) is provided with many cross gates (7); Described crushing wall shaping mold cavity (2) inner and outer wall is equipped with the built-in chill of polylith (4) and external chill (5).
3. the dither platform for circular cone sand making machine crushing wall casting moulds casting technique described in claim 1, it is characterized in that: rectangle support (101) corner is equipped with one or more stage clip (103) respectively, stage clip (103) lower surface is equipped with pressing plate (102), stage clip (103) is equipped with pressure-bearing shaking platform (104), pressure-bearing shaking platform (104) bedplate surface corner is provided with dihedral baffle plate (105), and dither (106) to be positioned in the middle part of pressure-bearing shaking platform (104) back side and to drive pressure-bearing shaking platform dither; Described pressure-bearing shaking platform (104) is made up of platen (109), riser (108) and corner spring top board (107), riser (108) is vertically welded on platen (109) back side, and corner spring top board (107) is welded on platen (109) corner by riser.
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CN104759606B (en) * 2015-04-17 2017-05-03 浙江机电职业技术学院 Rapid progressive solidification technique device for high manganese steel rolling mortal wall casting
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CN108115096A (en) * 2017-12-22 2018-06-05 天津万立鑫晟新材料技术研究院有限公司 A kind of shrinkage compensation method of template casting
CN113523244B (en) * 2021-07-09 2022-04-01 邯郸慧桥复合材料科技有限公司 Solid-liquid composite casting method for weldable bimetal wear-resistant part
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