EP0326876B1 - Dispositif pour refroidir et décocher des pièces coulées dans des moules en sable - Google Patents

Dispositif pour refroidir et décocher des pièces coulées dans des moules en sable Download PDF

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Publication number
EP0326876B1
EP0326876B1 EP89100981A EP89100981A EP0326876B1 EP 0326876 B1 EP0326876 B1 EP 0326876B1 EP 89100981 A EP89100981 A EP 89100981A EP 89100981 A EP89100981 A EP 89100981A EP 0326876 B1 EP0326876 B1 EP 0326876B1
Authority
EP
European Patent Office
Prior art keywords
rolling
drum
secured
support
cooling
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.)
Expired - Lifetime
Application number
EP89100981A
Other languages
German (de)
English (en)
Other versions
EP0326876A2 (fr
EP0326876A3 (en
Inventor
Hans Christian Christiansen
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.)
Dansk Industri Syndikat AS
Original Assignee
Dansk Industri Syndikat AS
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 Dansk Industri Syndikat AS filed Critical Dansk Industri Syndikat AS
Priority to AT89100981T priority Critical patent/ATE79577T1/de
Publication of EP0326876A2 publication Critical patent/EP0326876A2/fr
Publication of EP0326876A3 publication Critical patent/EP0326876A3/en
Application granted granted Critical
Publication of EP0326876B1 publication Critical patent/EP0326876B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D31/00—Cutting-off surplus material, e.g. gates; Cleaning and working on castings
    • B22D31/002—Cleaning, working on castings
    • B22D31/007—Tumbling mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
    • B22C5/08—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by sprinkling, cooling, or drying
    • B22C5/085—Cooling or drying the sand together with the castings

Definitions

  • the present invention relates to an apparatus for cooling and stripping cast objects, said apparatus being of the kind set forth in the preamble of claim 1.
  • each support wheel in the form of a single, circular-cylindrical rim provides a simple and hence economical construction, and by equipping this rim with at least three rolling tyres with radially outward diminishing width in the axial direction, a uniform distribution of the support pressure between the rolling surface member and each support wheel is achieved, as a space is formed between adjacent rolling tyres, in which each tyre may expand in the axial direction when subjected to the support pressure from the rolling surface member.
  • the resilient part of the support wheel were shaped in one piece - the material close to the center would experience a higher resistance against axial expansion than material close to the flanks, for which reason the support pressure per unit area would be greatest at the center of the support wheel. Due to the interspaces, the area of the rolling tyres is increased, which causes an improved cooling and hence a longer lifetime for the rolling tyres, normally consisting of organic material, such as synthetic rubber or an elastomeric synthetic resin, for which reason a thermal insulation of the rolling surfaces will normally be unnecessary.
  • each rolling surface member comprises a rolling track termed "rolling surface” secured to the outer periphery of two continuous and substantially plane annular plates, the inner periphery of which is secured to the drum, whereas their outer peripheral edges are secured to the edges of said rolling tracks.
  • rolling surface secured to the outer periphery of two continuous and substantially plane annular plates, the inner periphery of which is secured to the drum, whereas their outer peripheral edges are secured to the edges of said rolling tracks.
  • the rolling track in such an arrangement corresponds to a beam being resiliently secured at the ends, and which hence exhibits a not insignificant deflection under load. In large drums with wider rolling tracks, critical bending stresses with imminent danger of fatigue fracture may occur.
  • the apparatus shown in the drawing mainly comprises a drum 1, the forward part 1a of which is cylindrical and the rearward part 1b of which tapers towards the rear.
  • a drum 1 Concentrically with the drum two rolling rings 2 are arranged, the construction of which is explained in more detail below.
  • the rolling rings are bearing on support wheels 3, each being driven by a motor 4 with a gearbox 5.
  • the drive is such that the drum rotates in the direction of the arrow P1.
  • the support wheels 3 are journalled in foundation beams 6 bearing on a floor 7.
  • the floor has a recess to accommodate a conveyor belt 8, the upper run of which moves in the direction of the arrow P2.
  • the drum 1 At the forward end the drum 1 has an inlet opening 9, around which is disposed a suction box 10. Suction is caused by a suction device 11. Products P to be processed are fed from a conveyor belt 12, the upper run of which moves in the direction of the arrow P3.
  • a delivery conveyor 13 Placed at the outlet opening of the drum is a delivery conveyor 13, the upper run of which moves in the direction of the arrow P4.
  • the end portion of the drum 1 is construction in the form of a sieve wall 14.
  • Fig. 2 shows how the mass centre M of the load consisting of mould sand and castings is placed to the left of the vertical plane V-V.
  • This placing of the mass centre M produces a turning moment about the axis of rotation O of the drum 1.
  • This turning moment is taken up by the tangential forces from the support wheels 3.
  • the sum of the tangential forces have a not insignificant horizontal component.
  • the sum of the radial forces from the wheels have a horizontal component equal and opposite to the horizontal component from the tangential forces.
  • Placing the left support wheels 3 further to the left of the axis O produces a load distribution on the wheels that reduces the wear on the support wheels 3, compared to what would have been the case with a symmetrical arrangement.
  • each support wheel 3 is composed of three rolling tyres 55 of resilient material, such as a synthetic resin, i.e. polyurethane, said tyres being placed around a circular-cylindrical rim 56 with a smooth cylindrical outer surface.
  • the axial width of the three rolling tyres 55 diminishes slightly radially outward, for which reason they can carry radial compression forces in a substantially uniform manner, so that local load concentrations are avoided.
  • the load on each support wheel may become as high as 20 tons, it is important to avoid such load concentrations, as these could otherwise damage the rolling tyres.
  • a gearbox 5 with a coupled motor 4.
  • a reaction arm 16 to the end of which is pivoted a buffer 17.
  • the buffer 17 bears on the foundation beam 6.
  • drum guide wheels 18 are rotatably supported in the foundation beam 6 on each side of the rolling ring 2.
  • Fig. 3 shows a rolling ring 2 consisting of a relatively thick rolling track 57, which is secured to radially extending annular plates 58.
  • the plates 58 are locally secured to the drum 1 at 33, vide Fig. 2.
  • the plates 58 are connected to the rolling track 57 at distances 59 from the edges 60 of the rolling track 57 in such a manner that the ratio between each distance 59 and the axial width 61 of the rolling track 57 is approximately 1:6.
  • This arrangement reduces the load stresses in the rolling track 57 to a minimum.
  • this makes it possible to produce the rolling track 57 from relatively low-cost material, i.e. conventional sheet steel. no special machining being required.
  • Spray means 54 may be placed within the drum 1 for spraying the loose sand being produced when the sand moulds are tumbled in the drum 1 during its rotation.
  • the two foundation beams 6 are constructed substantially in the same manner and each has two support wheels, each with its own drive motor 4 and associated gearbox 5. Hence in cases where it is found necessary to keep spare foundation beams ready for use, it is sufficient to have a single foundation beam as a spare. If also the drive assemblies each consisting of a support wheel 3, a drive motor 4 and a gearbox 5, are of uniform construction, it is sufficient to keep one single drive assembly as a spare.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Tires In General (AREA)
  • Disintegrating Or Milling (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Underground Or Underwater Handling Of Building Materials (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Claims (2)

1. Appareil de refroidissement et de démoulage d'objets moulés dans des moules de sable et contenus dans de tels moules, l'appareil étant du type qui comporte un tambour (1) supporté afin qu'il tourne autour d'un axe pratiquement horizontal (O), ayant au moins deux surfaces de roulement ou organes (2) formant des surfaces de roulement, réalisés sur le tambour (1) ou fixés à celui-ci et en appui sur au moins quatre roues de support (3) dont l'une au moins est destinée à être entraînée afin que le tambour (1) tourne, les roues de support (3) étant constituées au moins partiellement d'un matériau élastomère, caractérisé en ce que chaque roue de support (3) comprend une seule jante (56) de forme pratiquement cylindrique de section circulaire constituée d'un matériau rigide, tel que l'acier, autour de laquelle sont placés au moins trois bandages de roulement (55) formés d'un matériau élastomère, la largeur axiale de ces bandages diminuant lorsque le rayon augmente.
2. Appareil selon la revendication 1 du type dans lequel chaque organe (2) formant une surface de roulement comprend une voie de roulement (57) fixée à la périphérie externe de deux anneaux (58) de support qui sont continus et sensiblement plans, les périphéries internes des anneaux étant fixées au tambour (1), caractérisé en ce que les anneaux de support (58) sont fixés aux surfaces des voies de roulement (57) tournées radialement vers l'intérieur à une distance (59) déterminée des bords (60) des voies de roulement, cette distance correspondant approximativement au sixième de la largeur axiale (61) des voies de roulement (57).
EP89100981A 1988-02-05 1989-01-20 Dispositif pour refroidir et décocher des pièces coulées dans des moules en sable Expired - Lifetime EP0326876B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89100981T ATE79577T1 (de) 1988-02-05 1989-01-20 Vorrichtung zum kuehlen und ausleeren von gussstuecken aus sandformen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK583/88 1988-02-05
DK058388A DK164776C (da) 1988-02-05 1988-02-05 Koele- og afformningsapparat for sandformstoebte emner

Publications (3)

Publication Number Publication Date
EP0326876A2 EP0326876A2 (fr) 1989-08-09
EP0326876A3 EP0326876A3 (en) 1990-05-16
EP0326876B1 true EP0326876B1 (fr) 1992-08-19

Family

ID=8095201

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89100981A Expired - Lifetime EP0326876B1 (fr) 1988-02-05 1989-01-20 Dispositif pour refroidir et décocher des pièces coulées dans des moules en sable

Country Status (7)

Country Link
EP (1) EP0326876B1 (fr)
CN (1) CN1009712B (fr)
AT (1) ATE79577T1 (fr)
BR (1) BR8900462A (fr)
DE (1) DE68902484T2 (fr)
DK (1) DK164776C (fr)
ES (1) ES2034409T3 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5267603A (en) * 1993-01-19 1993-12-07 Didion Manufacturing Company Sand reclaiming drum with media recycler
FR2735051A1 (fr) * 1995-06-09 1996-12-13 Ronis Sa Procede d'isolation phonique de tonnelets de decarottage de pieces metalliques de fonderie et tonnelet pour la mise en oeuvre de ce procede
ES2212708B2 (es) * 2002-02-27 2005-04-01 Urbar Ingenieros, S.A. Sistema de apoyo y rodadura para tambor desmoldeador en fundicion.
CN103878352B (zh) * 2014-04-08 2015-11-04 苏州石川制铁有限公司 一种用于铸件、浇道及冒口表面清理的方法
CN103978154B (zh) * 2014-04-22 2016-10-12 河北瑞欧消失模科技有限公司 砂温自动控制的针轮冷却机
AT517133B1 (de) * 2015-04-17 2017-09-15 Fill Gmbh Entkernmaschine/Rüttelmaschine mit verbessertem Antrieb
CN105312547A (zh) * 2015-12-08 2016-02-10 广西长城矿山机械设备制造有限公司 一种铸件清洗支撑台
CN109465428A (zh) * 2018-12-10 2019-03-15 新晃远大机械铸造有限公司 一种滚筒落砂机

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB939723A (en) * 1959-07-09 1963-10-16 Mining Engineering Co Ltd Improvements in impact rollers for belt conveyors
GB939694A (en) * 1961-02-28 1963-10-16 Parker Ltd Frederick Rotary vessels
DE2012303A1 (en) * 1970-03-14 1971-09-30 Wedag Westfalia Dinnendahl Running band for hot rotary equipment
DE2145607C3 (de) * 1971-09-13 1980-12-04 Krupp Polysius Ag, 4720 Beckum Laufring für Drehrohröfen, Trockentrommeln o.dgl
BE858259A (fr) * 1977-08-31 1978-02-28 Acec Rouleau-moteur pour le support et l'entrainement de la virole cylindrique d'un engin rotatif 0 axe horizontal ou faiblement incline
NL8102714A (nl) * 1981-06-04 1983-01-03 Multinorm Bv Inrichting voor het behandelen van een of meer gietstukken bevattende zandvormen.

Also Published As

Publication number Publication date
ES2034409T3 (es) 1993-04-01
DK58388D0 (da) 1988-02-05
ATE79577T1 (de) 1992-09-15
DK164776C (da) 1992-12-28
DE68902484T2 (de) 1993-01-14
DK58388A (da) 1989-08-06
DK164776B (da) 1992-08-17
CN1035969A (zh) 1989-10-04
EP0326876A2 (fr) 1989-08-09
EP0326876A3 (en) 1990-05-16
CN1009712B (zh) 1990-09-26
BR8900462A (pt) 1989-10-03
DE68902484D1 (de) 1992-09-24

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