US3537186A - Method for drying moulds - Google Patents

Method for drying moulds Download PDF

Info

Publication number
US3537186A
US3537186A US787764A US3537186DA US3537186A US 3537186 A US3537186 A US 3537186A US 787764 A US787764 A US 787764A US 3537186D A US3537186D A US 3537186DA US 3537186 A US3537186 A US 3537186A
Authority
US
United States
Prior art keywords
mould
drying
hot air
moulds
arm
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
US787764A
Other languages
English (en)
Inventor
Sven Bernhard Rennerfelt
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3537186A publication Critical patent/US3537186A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/12—Treating moulds or cores, e.g. drying, hardening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat

Definitions

  • the present invention relates to a method and a device for drying moulds.
  • the object of the invention is to eliminate at such a drying any risk for the occurring of fissures in the mould sand.
  • the device for carrying this method into effect comprises a vertically displaceable fan the movements of which are guided by switches influenced by a cam disk.
  • the present invention relates to a method for drying moulds by blowing hot air into the mould preferably through the casting gate.
  • the invention further relates to a device for carrying the method into effect.
  • the method according to the invention is characterised thereby that hot air is blown into the mould during a short time period, the mould being then left to cool during a considerably longer time before the next blowing in of hot air which is followed by a new cooling period and so on.
  • the device according to the invention in which the moulds are arranged on a conveyor displaceable from one station to another comprises a vertically displaceable fan, the movements of which are determined by a number of switches acted upon by a cam disk.
  • FIG. 1 shows the device in a side elevation
  • FIG. 2 is a view from the opposite side
  • FIG. 3 is a view from above
  • FIG. 4 is a plan view of a conveyor.
  • the drying of the moulds is carried out thereby that hot air, preferably at a temperature of 100-300 C., is blown in periodically.
  • a drying process may be carried out as follows: During a period of about two minutes hot air is injected through the charge opening into the mould. The mould is then brought to the side and is given a new treatment during two minutes by means of hot air after about one hour. The course of events is repeated until the desired dryness degree has been achieved in the mould.
  • the device according to the invention for carrying the method described in the aforegoing into effect comprises an arm 2 swingably carried at one end 1.
  • the arm is provided with a continuous channel 3 housing electric heating coils (not shown).
  • the arm 2 constitutes an elongation of the exhaust opening of a fan 4.
  • the end of the arm remote from the fan is provided with a mouth piece 5.
  • the letter is self-adjusting such that it seals against a mould 6 when lowered against the latter.
  • a disk 9 provided with cams 8, these cams intended to influence a number of switches 10.
  • Attached to the shaft 7 is further an eccenter disk 11 which is arranged right under the arm 2 and which has for its object to move the arm up and down.
  • a continuously variable gear 12 drives via an idling wheel the cam disk 9 as well as the eccenter 111.
  • Coupled directly to the shaft 7 is a geared motor 13.
  • the variator 12 is intended to operate all the time and with a very low number of revolutions.
  • the geared motor 13 is intended to be coupled in when there is desired a higher speed of the shaft, i.e. when the eccenter 11 has to move the arm 2. up or down.
  • the cams 8 (only one shown in FIG. 2) are arranged such on the disk 9 that the arm 2 from a swung up position by means of a start of the geared motor 13 and a resulting quick rotation of the eccenter 1.1 is lowered down to a position with the mouth piece 5 in abutment against the mould 6. In this position hot air is blown into the mould. The arm 2 remains in this position, until the cams 8 actuates one of the switches 10 for starting. The geared motor 13 again is started and the eccenter disk 11 swings the arm 2.
  • this conveyor 14 carrying the moulds 6.
  • This conveyor takes the shape of an endless conveyor and moves in a 'horizonttal plane. It is provided with a number of disks or tables 15 on which the moulds are arranged.
  • the conveyor 14 is stopped and at the same time the arm 2 is moved to a lowered position. The course of events is then repeated until the moulds have reached the desired degree of dryness.
  • the variator 12 renders possible an exact adjustment of the time period during which the 'hot air is blown into a mould.
  • the time that lapses until one and the same mould again reaches the mouthpiece 5 is of course considerably longer than the injection time proper.
  • step i of paragraph (a) includes further injecting the hot air specifically via themould-charging inlet.
  • step (a) is approximately two minutes; and the considerably longer period of time of step (b) is preferably approximately one hour. 2

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
US787764A 1968-01-16 1968-12-30 Method for drying moulds Expired - Lifetime US3537186A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE511/68A SE316268B (OSRAM) 1968-01-16 1968-01-16

Publications (1)

Publication Number Publication Date
US3537186A true US3537186A (en) 1970-11-03

Family

ID=20256685

Family Applications (1)

Application Number Title Priority Date Filing Date
US787764A Expired - Lifetime US3537186A (en) 1968-01-16 1968-12-30 Method for drying moulds

Country Status (3)

Country Link
US (1) US3537186A (OSRAM)
GB (1) GB1238229A (OSRAM)
SE (1) SE316268B (OSRAM)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2470964A1 (fr) * 1979-11-29 1981-06-12 Bruss Polt I Dispositif pour la determination de la duree de durcissement de noyaux et de moules de fonderie
WO1993019870A1 (en) * 1992-03-28 1993-10-14 Borden (Uk) Limited A method for making moulds
EP1551578A4 (en) * 2002-09-10 2006-05-24 Metal Casting Tech METHOD FOR HEATING MOLDING

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2385962A (en) * 1941-08-23 1945-10-02 Foundry Equipment Company Method of and apparatus for conditioning molds and the like
US2417673A (en) * 1943-07-15 1947-03-18 Foundry Equipment Company Apparatus for drying foundry molds

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2385962A (en) * 1941-08-23 1945-10-02 Foundry Equipment Company Method of and apparatus for conditioning molds and the like
US2417673A (en) * 1943-07-15 1947-03-18 Foundry Equipment Company Apparatus for drying foundry molds

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2470964A1 (fr) * 1979-11-29 1981-06-12 Bruss Polt I Dispositif pour la determination de la duree de durcissement de noyaux et de moules de fonderie
WO1993019870A1 (en) * 1992-03-28 1993-10-14 Borden (Uk) Limited A method for making moulds
EP1551578A4 (en) * 2002-09-10 2006-05-24 Metal Casting Tech METHOD FOR HEATING MOLDING

Also Published As

Publication number Publication date
SE316268B (OSRAM) 1969-10-20
GB1238229A (OSRAM) 1971-07-07

Similar Documents

Publication Publication Date Title
US4223451A (en) Method for drying timber
US3789093A (en) Method for accelerating the molding cycle by blanketing with dry carbon dioxide gas
US3537186A (en) Method for drying moulds
US3624806A (en) Method of heat treating by convection objects, such as flat individual blanks, molded pulp articles or continuous webs or threads, for example for plastic fibers, and a kiln for use in the method
ES2146857T3 (es) Instalacion para la fabricacion de tubos de plastico mediante procedimiento de fundicion centrifugada.
CN106417422B (zh) 冰淇淋蛋筒自动加工装置
US2696024A (en) Method for rotational casting of hollow articles
US4180379A (en) Blow molding machine with rotating core rods
JPS5749545A (en) Method and apparatus for controlling temperature of molds for injection molding
ES310945A1 (es) Procedimiento con un dispositivo realizador, para el moldeo de piezas al descubierto
JPH0514007B2 (OSRAM)
DE3069180D1 (en) Process and device for automating a drying cycle with air circulation for drying sand moulds
US3319294A (en) Apparatus for expanding and curing strip materials
JP3857638B2 (ja) 当接式温度測定装置
JPS5940204B2 (ja) 部品の焼入れ方法
CN221133958U (zh) 一种蜡模脱蜡焙烧一体室
US3277538A (en) Automatic core blowing machine
JP2527519B2 (ja) 溶融スラグ結晶化炉
JP3270878B2 (ja) 薄焼卵成型装置
JPS6036592Y2 (ja) 連続熱処理装置の水蒸気抜取り装置
JPS6028623Y2 (ja) アニ−ル装置
JPS6487313A (en) Method and apparatus for heating slush mold
RU2070469C1 (ru) Установка для литья
EP0335089A3 (de) Verfahren und Vorrichtung zum Entgraten kälteversprödbarer Formteilen
SU494358A1 (ru) Устройство дл закалки полых изделий из стекла с внутренней полостью