SU729424A1

SU729424A1 - Heating chamber of electric furnace for sintering powered articles

Info

Publication number: SU729424A1
Application number: SU772545930A
Authority: SU
Inventors: Юлий Яковлевич Дашевский
Original assignee: Предприятие П/Я Р-6382
Priority date: 1977-11-21
Filing date: 1977-11-21
Publication date: 1980-04-25

Description

(54) КАМЕРА НАГРЕВА ЭЛЕКТРОПЕЧИ(54) ELECTRIC HEATING CAMERA

ДЛЯ СПЕКАНИЯ ИЗДЕЛИЙ ИЗ ПОРОШКАFOR SINTERING PRODUCTS OF POWDER

1one

Изобретение относитс к области порошковой металлургии, в частности к печам дл спекани изделий из порошка.The invention relates to the field of powder metallurgy, in particular to furnaces for sintering articles from powder.

Известна печь дл спекани металлокерамических изделий, содержаща герметичный муфель, установленный в камере нагрева с нагревател ми, размещенными на внутренней поверхности футеров - ,киГ1. Камера нагрева такой конструкции характерна неравномерным нагревом муфел и спекаемых изделий как по сечению рабочего пространства, так и по его длине. Кроме того, температура на внутренней поверхности футеровки оказьшаетс выше, чем на поверхности муфел , что ведет к большим теплопотер м.A known furnace for sintering cermet products containing a sealed muffle installed in a heating chamber with heaters placed on the inner surface of the liners, KG1. The heating chamber of this design is characterized by uneven heating of the muffle and the sintered products both over the cross section of the working space and along its length. In addition, the temperature on the inner surface of the lining is higher than on the surface of the muffle, which leads to greater heat loss m.

Наиболее близким к предлагаемому изобретению по технической сущности и достигаемому результату вл етс камера нагрева электропечи дл спекани изделий из порошка, содержаща футерованный корпус, съемный свод, муфель т нагреватели, установленные снаружи 2. .The closest to the proposed invention in technical essence and the achieved result is a heating chamber of an electric furnace for sintering products from powder, containing a lined case, removable roof, muffle heaters installed outside 2..

В известном устройстве спиральный нагреватель навит непосредственно на муфель погруженный в теплоизол ционную засыпку. Однако срок службы замурованного нагревател очень непродолжителен из-за неблагопри тных условий работы, а создаваемый им нагрев муфел и изделий неравномерен по сечению рабочего пространства.In the known device, the spiral heater is wound directly onto the muffle immersed in the heat insulating filling. However, the life of a walled heater is very short due to the unfavorable working conditions, and the heating of the muffle and products created by it is uneven over the cross section of the working space.

. Целью изобретени вл етс повыше10 ние равномерности нагрева, снижение теплопотерь и увеличение срока службы нагревателей.. The aim of the invention is to increase the uniformity of heating, reduce heat loss and increase the service life of heaters.

Это достигаетс тем, что камера нагрбва снабжена разъемньшм опорами и This is achieved by the fact that the chamber is equipped with separable supports and

Claims

J5 metal rods placed in ceramic tubes, the rods located circumferentially on the outer surface of the muffle and secured in onopaij, and the heaters are zigzag and mounted on the horn, while the heaters can be made in the form of upper and lower sections, and Ceramic washers are installed between the tubes and the supports. FIG. 1 shows a camera, a longitudinal section; in fig. 2 shows section A-A in FIG. 1. A hermetic cylindrical muffle 1 is installed inside the lined body 2 on two detachable supports 3, the supports 3 are provided with sockets for fastening steel rods 4, on which ceramic tubes 5, insulating rods relative to the muffle surface and ceramic washers are mounted 6. The rods are circumferentially circumferential the outer surface of the muffle, and zigzag heaters mounted on the rods, consisting of the upper 7 and lower 8 sections with leads 9 through the lined body 2. From above, the chamber is covered with lined nym the vault 1D. When heating sections 7 and 8 are turned on, heat transfer from their surface is not hindered by backfilling the muffle 1. Relying on reinforced rods 4 and ceramic pipes 5, the heater freely radiates energy to the outer surface of the muffle and the inner surface of the core lining 2. Surface temperature The lining is lower than on the muffle. Reducing the temperature of the internal chamber of the electric furnace leads to a decrease in heat loss from its external surface. The proposed design allows to increase the heating uniformity, the removable roof 10 and the detachable supports 3 support 7 44 the convenience of repairing heaters, and separate control of their power or raising sections with different parameters allows changing the temperature difference over the cross section of the working space. Claim 1, An electric furnace heating chamber for sintering powder products, comprising a lined body, a removable roof, a muffle and heaters mounted outside the muffle, so as to increase the uniformity of heating, reduce heat loss and increase the service life of heaters, it is provided with detachable supports and metal rods placed in ceramic tubes, with the rods arranged around the circumference from the outer surface of the muffle and fixed in the supports, and the heaters are zigzagged shaped and mounted on rods,

2. The chamber according to claim 1, so that the heaters are filled in the form of the upper and lower sections, and ceramic washers are installed between the tubes and the supports. Sources of information taken into account in the examination 1. The author's certificate of the USSR No. 398345, cl. B 22 F 3/10, 1971, 2, USSR Copyright Certificate No. 441103, cl. B 22 F 3/10, 1972,