EP0285688A1 - Chauffage pour la busette d'aspiration d'une machine de coulée à dépression - Google Patents

Chauffage pour la busette d'aspiration d'une machine de coulée à dépression Download PDF

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Publication number
EP0285688A1
EP0285688A1 EP87105126A EP87105126A EP0285688A1 EP 0285688 A1 EP0285688 A1 EP 0285688A1 EP 87105126 A EP87105126 A EP 87105126A EP 87105126 A EP87105126 A EP 87105126A EP 0285688 A1 EP0285688 A1 EP 0285688A1
Authority
EP
European Patent Office
Prior art keywords
intake manifold
section
heating
heater according
insulating
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.)
Granted
Application number
EP87105126A
Other languages
German (de)
English (en)
Other versions
EP0285688B1 (fr
Inventor
Wilfried Schwab
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.)
Maschinenfabrik Mueller Weingarten AG
Mueller Weingarten AG
Vereinigte Aluminium Werke AG
Original Assignee
Maschinenfabrik Mueller Weingarten AG
Mueller Weingarten AG
Vereinigte Aluminium Werke AG
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 Maschinenfabrik Mueller Weingarten AG, Mueller Weingarten AG, Vereinigte Aluminium Werke AG filed Critical Maschinenfabrik Mueller Weingarten AG
Priority to DE8787105126T priority Critical patent/DE3766363D1/de
Priority to AT87105126T priority patent/ATE58497T1/de
Priority to EP87105126A priority patent/EP0285688B1/fr
Publication of EP0285688A1 publication Critical patent/EP0285688A1/fr
Application granted granted Critical
Publication of EP0285688B1 publication Critical patent/EP0285688B1/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
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/30—Accessories for supplying molten metal, e.g. in rations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00—Pressure casting; Vacuum casting
    • B22D18/06—Vacuum casting, i.e. making use of vacuum to fill the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D35/00—Equipment for conveying molten metal into beds or moulds
    • B22D35/06—Heating or cooling equipment

Definitions

  • the invention relates to an intake manifold heater for the intake manifold in a vacuum die casting machine, in which the intake manifold has a lower pipe section surrounded by an electric heater, which is fixedly connected to a subsequent upper suction pipe section carried in a mounting opening of a receiving flange.
  • the invention has for its object a suction To develop pipe heating of the type mentioned, in which a satisfactory heating of the entire intake manifold, ie the lower and the upper intake manifold section, is achieved with simple means and with good economy.
  • an intake manifold heater of the type mentioned at the outset in that an electric heater is also provided in the region of the upper intake manifold section, which has heating spirals lying directly on the outer circumference of the upper pipe section, with an externally insulating protective layer applied radially on the outside of the heating spirals is.
  • a cover sleeve made of insulating material, which is attached to the outside of the heating spirals, is preferably provided as the insulating protective layer.
  • the upper pipe section is also specifically provided with an electric heater which, by arranging an externally insulating protective layer, also results in a particularly effective heating this pipe section leads.
  • the fact that the insulation to the outside according to the invention is present in the area of the heating spirals also prevents a noteworthy and undesirable heat emission to the outside, particularly to the receiving flange, especially in the head area.
  • the upper intake manifold section is formed in its upper part, that is to say the part facing the casting chamber, in the form of a pipe socket, on which a bell-shaped cross section which widens upwards in cross section, this pipe socket forming an encircling, upwardly extending part widening annular gap partially radially outside Covering holding flange connects, which is held with its outer surface in the mounting opening of the receiving flange and is firmly connected at its lower end to the lower intake manifold section, the heating spirals being arranged around the upper intake pipe section into the annular gap and most preferably the inner diameter of the bell-shaped expanding retaining flange at any point where it covers the inside of the heating coils on the outside is larger than the outside diameter of the heating coils (ie an additional radial gap is always kept free between the outside diameter of the heating coils and the inside surface of the bell-shaped section).
  • the outwardly insulating protective layer is preferably provided into the area of the annular gap, with, again preferably, the annular gap around the heating spirals being completely filled with insulating material. It is again advantageous here if the cover sleeve made of insulating material partially projects into the annular gap with its lower end region, the radial outer surface of the projecting section being designed accordingly and bearing against the bell-shaped holding flange.
  • the outer and inner boundary surface of the bell-shaped widening retaining flange is very particularly preferably spherical, the radius of curvature of the inner boundary surface being smaller than that of the outer boundary surface, i.e. the cross-section of the bell-widening retaining flange becomes thicker with increasing distance from its mouth at the pipe socket .
  • the bell-shaped, upwardly widening retaining flange usually sits in a receiving opening of the receiving flange, which in turn is also spherical, but with a larger radius, this further leads to the support or contact surface of the bell-shaped widening retaining flange on the the heat losses can occur relatively high up on the holding flange and thus in an area in which the insulation layer between the holding flange and the internal heating spirals spanned by it is already particularly thick.
  • the insulating protective layer arranged radially on the outside around the heating spirals of the upper intake manifold section consists of insulating heat-resistant mats, preferably asbestos mats, or of ceramic or special ceramic material, such as in particular silicon nitride, silicon carbide, aluminum nitride, silicon oxide or circonium oxide .
  • the heating circuits of the electric heating of the upper and lower intake manifold sections are carried out separately from one another, so that, in contrast to gas heating, a targeted and controlled different heating of the upper and lower intake manifold sections is possible, which permits , not only to optimally temper the suction pipe over its length, but also to optimize (thereby) the energy consumption.
  • the intake manifold heater consists in that the heating spirals also bear directly on the outer circumference of the intake manifold at the lower intake manifold section and are held on their outside by means of a tension ring.
  • the clamping ring is preferably made of insulating material, in particular again of heat-resistant insulating mats, such as asbestos mats. or of ceramic or special ceramic material (as such are already mentioned in detail above).
  • a slotted clamping sleeve is also preferably provided as a clamping ring, which, for. B. can be made of a suitable metallic material.
  • heating coils in the form of tubular heating elements are very particularly preferably used in the intake manifold heater according to the invention.
  • the heating coils on the upper intake manifold section abut at their axial upper end against an end ring made of a material of good thermal conductivity, preferably copper or another good thermally conductive material. This is because good thermal conductivity is desirable on its axial end face on the side facing the casting chamber, in order to ensure good heating at the point of introduction into the casting chamber.
  • connection head With the electric intake manifold heater according to the invention, the heat losses occurring in the upper intake manifold section are largely reduced, so that the upper intake manifold section ("connection head") can be brought to the required temperatures even with a simple electric heater and can also be easily kept on it.
  • FIG. 1 a sectional view through a device according to the invention is shown, which shows an upper suction pipe section 1 and a lower suction pipe section 2, which is firmly connected to this (which is only shown in its upper part and from which the end region is cut off).
  • the upper section 1 of the suction pipe is intended to be connected to the casting chamber (not shown in the figure).
  • the Extension of the lower suction pipe section 2 leads to the melt of the light metal to be cast, into which it is immersed, which, however, as already mentioned, is not shown in the figure.
  • the upper intake pipe section 1 and the lower intake pipe section 2 are firmly connected to one another, for example by welds 3.
  • the lower intake manifold section 2 is provided on its outer circumference with heating spirals 4 which bear directly against its outer circumference and are connected to an electrical energy source via a connection 5 (shown only in principle).
  • the upper intake pipe section 1 consists of an upper section in the form of a pipe socket, which is followed at the bottom by a holding flange 8 which widens outward in a bell-shaped manner and which is in turn held in a receiving opening 13 of a receiving flange 10.
  • An annular gap 12 is formed between the inner boundary surface 17 of the holding flange 8, which widens upward in the shape of a bell, and the outer surface of the upper region of the upper intake manifold section 1, which is designed as a pipe socket and has an increasing cross section (with increasing outer radius) with increasing distance upwards.
  • the holding flange 8 is provided with an outer surface 16 and an inner surface or inner boundary surface 17, each of which is designed in the form of a spherical segment.
  • the radius of curvature of the inner boundary surface 17 is chosen to be smaller than that of the outer boundary surface 16.
  • a covering sleeve 9 made of insulating material is pushed onto the heating spirals 6. With its lower end region 15, this cover sleeve 9 projects a small section into the annular gap 12, the outer surface 14 of this end section 15 of the cover sleeve 9 being designed corresponding to the inner surface 17 of the holding section 8, so that the outer surface 14 of the cover sleeve 9 and the inner surface 17 of the retaining flange 8 abut each other.
  • the still free space within the annular gap 12 is completely filled with an insulating material 11, so that there is virtually radial insulation to the outside of the heating coil over the entire axial extent of the heating coil 6 at the upper intake manifold section 1.
  • the volume of the annular gap 12 widening towards the top achieves an insulating layer radially thickening from the lowest heating coil upwards, so that precisely in the level position of the contact area 20 between the holding flange 8 and the receiving opening 13 of the receiving flange 10, at which Place the heat emission from the holding flange 8 to the receiving flange 10 is cheapest, there is a particularly thick insulating layer.
  • the heating spirals 6 are on the upper suction pipe Section 1 connected via its own connection 7 to an electrical energy source, which is preferably a heating circuit which is separate from the heating circuit at the lower intake manifold section 2.
  • the heating coil formed from the heating coils 6 bears against an end ring 19, which is made of a material with good thermal conductivity, such as copper, and whose task it is to heat the heating coils 6 when the upper suction tube section is connected to the casting chamber to transfer the adjoining area of the casting chamber and thus also to ensure sufficient heating of the small end section of the upper suction pipe section 1 projecting there in the transition area.
  • the heating spirals 4 are preferably also surrounded on their radially outer side by an insulation layer 21, which can in particular consist of heat-resistant mats.
  • an insulation layer 21 which can in particular consist of heat-resistant mats.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Resistance Heating (AREA)
  • Pipe Accessories (AREA)
  • Moulding By Coating Moulds (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Furnace Details (AREA)
EP87105126A 1987-04-07 1987-04-07 Chauffage pour la busette d'aspiration d'une machine de coulée à dépression Expired - Lifetime EP0285688B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE8787105126T DE3766363D1 (de) 1987-04-07 1987-04-07 Saugrohrheizung fuer das saugrohr bei einer vakuum-druckgiessmaschine.
AT87105126T ATE58497T1 (de) 1987-04-07 1987-04-07 Saugrohrheizung fuer das saugrohr bei einer vakuum-druckgiessmaschine.
EP87105126A EP0285688B1 (fr) 1987-04-07 1987-04-07 Chauffage pour la busette d'aspiration d'une machine de coulée à dépression

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP87105126A EP0285688B1 (fr) 1987-04-07 1987-04-07 Chauffage pour la busette d'aspiration d'une machine de coulée à dépression

Publications (2)

Publication Number Publication Date
EP0285688A1 true EP0285688A1 (fr) 1988-10-12
EP0285688B1 EP0285688B1 (fr) 1990-11-22

Family

ID=8196905

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87105126A Expired - Lifetime EP0285688B1 (fr) 1987-04-07 1987-04-07 Chauffage pour la busette d'aspiration d'une machine de coulée à dépression

Country Status (3)

Country Link
EP (1) EP0285688B1 (fr)
AT (1) ATE58497T1 (fr)
DE (1) DE3766363D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2227437A (en) * 1989-01-31 1990-08-01 Mannesmann Ag Heated casting tube
CN102513517A (zh) * 2011-12-23 2012-06-27 华南理工大学 一种分段可拆式间接挤压铸造合金溶体的输料管道
CN108655366A (zh) * 2018-07-04 2018-10-16 中信戴卡股份有限公司 一种升液管法兰加热装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2195360A (en) * 1938-12-02 1940-03-26 John R Daesen Die casting apparatus and method
GB735155A (en) * 1953-06-26 1955-08-17 Dow Chemical Co Apparatus for delivering metered shots of molten metal for castings
US3447593A (en) * 1967-05-25 1969-06-03 Mt Vernon Die Casting Corp Apparatus for die casting
EP0051310B1 (fr) * 1980-11-03 1985-01-23 Maschinenfabrik Müller-Weingarten AG Appareil de moulage par injection pour la coulée de pièces

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2195360A (en) * 1938-12-02 1940-03-26 John R Daesen Die casting apparatus and method
GB735155A (en) * 1953-06-26 1955-08-17 Dow Chemical Co Apparatus for delivering metered shots of molten metal for castings
US3447593A (en) * 1967-05-25 1969-06-03 Mt Vernon Die Casting Corp Apparatus for die casting
EP0051310B1 (fr) * 1980-11-03 1985-01-23 Maschinenfabrik Müller-Weingarten AG Appareil de moulage par injection pour la coulée de pièces

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2227437A (en) * 1989-01-31 1990-08-01 Mannesmann Ag Heated casting tube
CN102513517A (zh) * 2011-12-23 2012-06-27 华南理工大学 一种分段可拆式间接挤压铸造合金溶体的输料管道
CN102513517B (zh) * 2011-12-23 2013-12-11 华南理工大学 一种分段可拆式间接挤压铸造合金熔体的输料管道
CN108655366A (zh) * 2018-07-04 2018-10-16 中信戴卡股份有限公司 一种升液管法兰加热装置

Also Published As

Publication number Publication date
EP0285688B1 (fr) 1990-11-22
ATE58497T1 (de) 1990-12-15
DE3766363D1 (de) 1991-01-03

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