WO2007105230A2 - Dispositif ameliore pour chauffer et secher des baguettes de soudure - Google Patents

Dispositif ameliore pour chauffer et secher des baguettes de soudure Download PDF

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Publication number
WO2007105230A2
WO2007105230A2 PCT/IN2007/000088 IN2007000088W WO2007105230A2 WO 2007105230 A2 WO2007105230 A2 WO 2007105230A2 IN 2007000088 W IN2007000088 W IN 2007000088W WO 2007105230 A2 WO2007105230 A2 WO 2007105230A2
Authority
WO
WIPO (PCT)
Prior art keywords
air
welding rods
heating
chamber
improved device
Prior art date
Application number
PCT/IN2007/000088
Other languages
English (en)
Other versions
WO2007105230A3 (fr
Inventor
Vempati Venkat Sunderswar Rao
Original Assignee
Sowbal Aerothermics
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 Sowbal Aerothermics filed Critical Sowbal Aerothermics
Publication of WO2007105230A2 publication Critical patent/WO2007105230A2/fr
Publication of WO2007105230A3 publication Critical patent/WO2007105230A3/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
    • F26B9/003—Small self-contained devices, e.g. portable
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/04—Heating arrangements using electric heating
    • F26B23/06—Heating arrangements using electric heating resistance heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
    • F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers

Definitions

  • the present invention relates to an improved device for heating / drying welding rods.
  • the invention particularly relates to a device for heating /drying welding rods, preferably flux coated welding rods, using ceramic honeycomb based air heaters.
  • the present invention particularly, relates to an improved heating device using forced convection heat transfer by means of ceramic honeycomb based air heaters.
  • the device of the present invention is useful for applications in an unique and innovative heating technique for heating flux coated and some non flux coated welding rods so as to preheat them for the purpose of removal of absorbed moisture from the flux coating and for raising the temperature of the welding rods as the case may be, immediately before the welding operation.
  • the heating device of the present invention is compact highly operational and energy efficient , noise free, simple in design, portable with excellent trouble free usage and at the same time economical and aesthetically better coupled with long life.
  • the heating device of the present invention is, therefore, very useful for application as one of the most important accessories to the welding process world wide and to humid areas in particular and offers many advantages over conventional systems.
  • Welding is the operation performed to join two metal components.
  • the strength of the welded joint depends primarily on the quality of the welding rod employed for performing the welding operation.
  • Quality of the flux coating on the welding rod is of importance as it affects the purity and cleanliness of the welding joint.
  • Moisture present in the flux coating of the said flux coated welding rod will result in gas entrapments and voids making the welded joints weak.
  • a rotary oven is disclosed, which is shown in Fig 1, 2, &3 of the drawing accompanying this specification.
  • the oven (14) having a side (13), bottom(12) and top(ll) walls enclosing an oven chamber, a heater chamber (33) located outside said oven chamber and having a heater (37) for supplying heated gaseous fluid to said oven chamber , at least one horizontal rotary baking shelf(22,23,24) in said oven chamber supported for rotation on a vertical axis and means for rotating the baking shelf around said axis, the improvement comprising a transverse horizontal shelf walls ( 66,67,68) extending across the oven chamber circumferentially around the baking shelf, the shelf wall and the baking shelf cooperating with each other to provide a substantially imperforate partition dividing the oven into a baking compartment( 69,71,72) above the baking shelf and the shelf heating compartment (73,74,76) below the baking shelf, a supply conduit(47) connecting the heater chamber (33) to the shelf heating compartment for delivery
  • the above defined apparatus is employed for drying/heating material placed in shelves and the shelves being rotated on a vertical axis by means of a rotating mechanism to facilitate good contact with heated gaseous fluid which is let in to the oven chamber containing the shelves.
  • the device has no arrangement to insure uniform heat transfer to individual welding rods placed over the shelves.
  • the device has too many moving parts which may require frequent maintenance due to regular and normal wear & tear.
  • the apparatus is also not portable.
  • the apparatus has a bare terminal end, using induction heating and comprising : a slot induction heater (3) having a substantially vertical arrangement of a slot (4) and subdivided into several sections(3 A) along the length thereof, each of the said sections of the said slot induction heater incorporating top and bottom side electro conductive bus-bars (6) and middle electro conductive bus-bars(6b), all of said bus-bars being disposed along sides of the said slot, for carrying an electric current of a substantially identical magnitude, and having different vertical widths, said middle electro conductive bus-bars(6C) having a vertical width exceeding a vertical width of a said top and bottom side electro conductive bus-bars, said top side electro conductive busbars having a vertical width exceeding a vertical width of said bottom side electro conductive bus- bars, a chain conveyor(7) provided with inlet (15) and outlet(16)
  • the above described apparatus is used for drying coated welding electrodes in a conveyorized arrangement useful only for bulk production and cannot be used in batch type applications and small quantities.
  • the apparatus also has a limitation in its mobility as it cannot be moved due to its bulky shape.
  • the said apparatus employs induction heating as the means of heating the coated welding electrodes thereby making the process non viable and uneconomical for batch operations.
  • the apparatus has also too many moving parts due to which the consumption of power is more, wear and tear is more and also requires more skilled personnel for its operation.
  • the oven comprises a housing (1) defining a baking chamber and including a plurality of stacked segments placed one on top of the other and comprising an upper segment (A),an intermediate segment (B) and a lower segment (C) , said segments being self-contained and when stacked on one another collectively forming the housing and providing the oven in substantially ready condition for operation , said upper segment including heating and circulating means (9) for hot air and a cover (2) for the baking chamber disposed beneath said heating and circulating means , said lower segment including a floor (3) on which a rack (8) containing the goods to be baked can rest, at least two of said segments including vertical walls (4) which collectively form vertical walls of said baking chamber when the segments are stacked on one another ,said segments resting on one another via horizontal stacking surfaces (21) thereof, said baking chamber extending between said cover (2) and said floor (3) and being bounded by the said vertical walls (4) of the stacked segments
  • the above described apparatus has an arrangement of racks over which the material to be heated rests and has no provision to insure uniform circulation of hot air or heat around individual welding rods and can not heat flux coated welding rods efficiently.
  • the apparatus also has too many moving parts which makes the operation more cumbersome.
  • the apparatus is also not portable.
  • the energy efficiency of the above described apparatus will be low when used for heating or drying flux coated welding rods.
  • an oven for heating products as they traverse vertically within the oven is disclosed which is shown in Figs.- 9 & 10.
  • the oven comprises: an oven housing (13) having an open front end , sidewalls and a rear wall; at least one heat circulation fan (59) secured to the housing for circulating air within the oven housing; at least one heater element (27) disposed within said oven housing (13); a duct assembly (30) retractably disposed within said housing for distributing heat from said heater elements (27); a conveyor assembly (40) retractably disposed within said oven housing and said duct assembly for receiving and vertically transporting products to be baked within the oven housing ; and a conveyor assembly drive mechanism ( 49 and 51 ) disposed external to said housing for imparting motion to said conveyor assembly.
  • the limitation of the apparatus of the above is its non-portability.
  • the apparatus has also too many moving parts making it prone to wear and tear and maintenance.
  • the apparatus is not useful for batch type applications.
  • the apparatus does not have any special provision to support welding rods so as to insure uniform and complete heating of individual welding rods during the heating operations.
  • a convection oven which is shown in Fig.- 11.
  • the said oven comprising : an insulated oven chamber (14) having a floor (18), a ceiling (20), a plurality of walls ( 22, 24, 26 ), and an access door (16 ); an inlet air passageway (30 ) communicating at one end with ambient external air and at another end with said oven chamber; a heating element (40 ) for heating air in said inlet air passageway; an exhaust passageway (42) communicating with said oven chamber for exhausting air there from; a baffle plate (62) spaced from one of the said walls, said baffle plate (62) dividing said oven chamber (14) into a baking compartment (66) in which food is cooked and a blower compartment (64);a blower fan (50 ) disposed in said blower compartment (64) for drawing heated air from the said inlet air passageway (30 ) into said oven chamber (14), circulating the heated air in said oven chamber (14),and expelling air through said exhaust passageway(42), whereby rotation of
  • the above described oven has a baking chamber, which does not have any special provision to support welding rods. Hence any welding rods heated in this apparatus have to be placed in the chamber in a heap, resulting in non-uniform heating of the welding rods, resulting in inefficient energy utilization.
  • the main objective of the present invention is, therefore, to provide an improved device useful for heating / drying welding rods efficiently avoiding the limitations of the prior art devices.
  • Still another objective of the present invention is to provide an improved device useful for heating / drying the welding rods which is economical and safe.
  • the heater comprises a main body(l)provided with insulation having an inlet(2) and an outlet(3) at two ends respectively, a distributor/dffiuser disc(4) placed at the inlet end of the heater for uniform distribution of air, the main body(l) housing at least a single honeycomb structured monolith unit of appropriate configuration made of Cordierite or steatite or alumina or alumina silica based body with plurality of parallel holes acting as channels for the passage of air when air is blown or allowed to pass through them, wherein the plurality of parallel holes have at least one electrical resistance heating element of pre-determined cross section and length woven through the honeycomb channels in such a way that the weavings are in genera ⁇ parallel to each other and also parallel to the direction of the flow.
  • the def ⁇ fjjp pf?the 'present invention are shown in the Figs.14 to 17 in which
  • Fig.- 14 shows the general appearance of the simplest form of the heating/ drying oven of the present invention.
  • Fig. - 15 shows the general appearance of the oven with the flux coated welding rods placed in the main heating chamber of the oven on the support grill, causing the electrodes to span out in varying angles resulting in inter rods spacing.
  • Fig.- 16 shows the welding rod support grill ('G') made of concentric wire rod rings of narrowing diameters and arranged one above the other with gaps in between the rings so as to form a truncated conical formation when assembled. The gaps provided in between the rings is always less than the cross sectional diameter of the flux coated welding rod .
  • Fig.- 17 shows the electrical circuit diagram for the control panel.
  • the present invention provides an improved device for heating / drying welding rods which comprises of an outer body('O')provided with four wheels ('w') to its base plate('B'),the outer body enclosing a stainless steel chamber('C) which is divided into an upper ('M') and lower('L') chambers by a wire rod grill ('G") which is made of concentric circular rings( c r')of narrowing diameters and assembled in such a manner that they form a truncated cone with gaps in between the rings to hold and support the welding rods which are to be heated/dried when positioned vertically over the support grill(G),the upper chamber (M) being in the form of an inverted and truncated cone provided with insulation and having an insulated lid('T') with an air vent port(V) in the form of an open ended tube which also serves as a temperature sensor(Sn),the upper chamber being divided into
  • the improved heating device of the present invention which is useful for heating / drying welding rods has an outer body (O) made up of a tubular frame and MS sheet fabrication of rigid construction.
  • the chambers are made up of Stainless steel, preferably 304 grade stainless steel.
  • the upper chamber ( C M') is insulated and is in the form of a truncated upside down cone of suitable slant angle, length and with other dimensions suitable to hold a known weight and the entire length of most commercial flux coated welding electrode rods of different sizes.
  • This wire rod frame (F) is made up of four equal compartments that divide and hold the welding rods in a near vertical position.
  • the device of the present invention has a welding rod support grill (G) fabricated from concentric rings of sufficiently thick wire rod. The diameters of the concentric rings narrow down gradually giving the assembly a truncated conical formation with regular voids in between the individual rings for free flow of hot air.
  • the outer diameters of the wire rod rings have a difference of about 4mm and preferably designed to keep the inter ring gap less than the outer diameter of the welding rods to be heated.
  • the welding rods placed inside the upper chamber are divided into four units and when one such heated and dried unit is drawn for usage, the empty segment in the chamber is filled by fresh welding electrodes which are to be heated and dried in succession without any sort of mix-up.
  • An air inlet port on the outer body of the device near the air blower (A) may be provided, if required, to facilitate suction of fresh air by the blower.
  • the control panel includes a Voltage regulator to reduce the incoming voltage of the power supply to the oven so that when sufficient quantity of the flux coated welding rods are dried/ heated, the temperature of the incoming hot air can be reduced to required levels, sufficient to maintain the heat and thereby further reduce the wastage of heat and subsequently power consumption.
  • the plurality of the parallel holes have at least one electrical, resistance heating element of predetermined cross section and length woven through the honeycomb channels in such a way that the weavings are in general parallel to each other and also parallel to the direction of the flow.
  • the heating element is woven through the honeycomb channels of the honeycomb monolith in such a way that the finished heater will have the element passing through each channel only once and also in such a way that air can freely pass through the annular space between the element and the walls of the channel leavings which are in general parallel to each other and also parallel to the direction of flow.
  • the electrical heating element is woven in all or some of the channels , the said heating element may be woven as a straight wire , strip, ribbon or a zig zag bent form or even as a coil.
  • both the ends of the said electrical resistance heating element are properly terminated to two electrodes which are in turn fixed rigidly by a suitable ceramic cement into two empty channels of the said ceramic honeycomb monolith structure, the electrodes being positioned on the air inlet end of the honeycomb.
  • the ceramic honeycomb based air heater is rigidly held in the heater box with sufficient wool packing to withstand the shocks of movement as well as to insulate the heater.
  • the air blown by the blower directly reaches the heater and passes through the heater and gets heated up.
  • the inlet duct (D) is attached to the lower cylindrical chamber (L) in a tangential fashion while the longitudinal axis of the duct (D) is slightly inclined upwards while entering the lower chamber (L).
  • the support grill (G) has equally spaced wire rod rings(r) to allow uniform volumes of air passage upward in to the upper chamber (M) along its cross section.
  • the construction of the device of the present invention provides the support for the welding rods in the heating chamber, in such a fashion that when the welding rods are placed in the chamber for drying a minimum gap is created naturally between each welding rod owing to the uneven landing position of individual welding rods on the support grill.
  • the device provides a slanted grill, which allows the passage of air freely and uniformly.
  • the device is supplied power through a known control panel ('P'). which has the necessary safety switches (a),fuses (f), regulators (Vc), indication lamp(i) temperature sensor (Sn) with the lead wire and the terminals (P,N.E) as shown in Fig. 13.
  • An auto cut off system can also be incorporated in the device in addition to the control panel. If such a cut off system is incorporated, it may be through a micro switch (S) fixed to the lid (T) of the chamber (M) in such a manner that when ever the lid of the device is lifted , the device stops functioning. Such a cut off system facilitates switching off the hot air blower and avoids injury to the operators as well as the wastage of heat thereby making the device economical.
  • the air blower and its motor are rigidly fixed to the main base and serve as the air source.
  • the blower can be a centrifugal blower, an axial blower, a tangential blower or any other blower to suit the need.
  • the device is provided with 4 wheels (w) which are attached to the base plate (B) which makes the device movable to the operation site which facilitates its easy mobility.
  • the heater and the blower are switched ON by operating the electrical panel.
  • the hot air from the heater enters the lower cylindrical chamber of the oven tangentially and moves upward due to the slight upward inclination provided to the entry duct 'D' in the lower chamber.
  • the said hot air adopts, a circuitous motion, even while moving upwards in the main upper heating chamber there by covering the entire cross sectional area of the oven chamber during its ascent.
  • the hot air surges upwards and forces itself through the concentric ring grill and comes in to contact with the welding rods which are resting on the grill in an almost vertical position and extending in to the upper chamber (M).
  • the electrodes are heated up uniformly and quickly and the exhaust air with certain moisture escapes through the vent 'V.
  • the device is switched off, preferably manually. However, whenever it is required to draw the heated electrodes from the device, the lid is opened, while the device is still in operation, the auto cut off switch (S) will automatically switch off the hot air blower arrangement and the device will stop its operation.
  • the present invention utilizes the upward and circuitous movement of the hot air coupled with the vertically spanned out flux coated welding rods available in the path of the upward flowing hot air stream to improve the hot air to welding rod contact.
  • the present invention also ensures that the said flux coated welding electrodes are spaced apart from each other naturally with out any external holding mechanism to allow improved hot air contact resulting in improved drying and quicker heating cycles.
  • the drying process consumes optimum time to heat, consumes minimum power to heat and dry uniformly, and also causes minimum fatigue to the operator while making the process thermally and operationally efficient and the equipment nearly maintenance free.
  • the device of the invention helps to minimize surface heat losses by means of cladding ceramic fiber blanket/ rock wool or any other suitable insulating material in between the two layers of the main heating chamber body and also the lid of the oven.
  • the oven of the present invention also provides for the escape of released moisture along with the outgoing air, via an air exit port in the lid in the form of an open ended tube which also acts as a well to dip the sensor for temperature measurement at required intervals.
  • the device is simple, compact and inexpensive.
  • the device has only the motor and the blower as the moving parts making the unit noise free, vibration free and with reduction in breakdowns due to wear and tear usually associated with the moving parts.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

La présente invention concerne un dispositif amélioré pour chauffer et sécher des baguettes de soudure, de préférence des baguettes de soudure enrobées de flux, en utilisant le transfert de chaleur par convection forcée par le biais de réchauffeurs d'air à nids d'abeille en céramique. Le dispositif de la présente invention est utile pour chauffer des baguettes de soudure enrobées de flux et des baguettes de soudure non enrobées de flux de manière à les préchauffer dans le but de retirer toute humidité absorbée du revêtement de flux et pour augmenter la température des baguettes de soudure le cas échéant, immédiatement avant l'opération de soudure. Le dispositif de chauffage de la présente invention est compact, hautement opérationnel et à faible consommation d'énergie, silencieux, d'une conception simple, portable et d'un usage sans incident excellent.
PCT/IN2007/000088 2006-03-15 2007-03-08 Dispositif ameliore pour chauffer et secher des baguettes de soudure WO2007105230A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN463CH2006 2006-03-15
IN463/CHE/2006 2006-03-15

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WO2007105230A2 true WO2007105230A2 (fr) 2007-09-20
WO2007105230A3 WO2007105230A3 (fr) 2007-11-08

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101886872A (zh) * 2010-06-17 2010-11-17 深圳市山木电池科技有限公司 一种锂离子电池干燥的方法和装置
CN102564078A (zh) * 2011-11-25 2012-07-11 中国西电电气股份有限公司 一种电瓷湿坯电干燥装置及其方法
CN102645095A (zh) * 2012-05-14 2012-08-22 西安圣华电子工程有限责任公司 智能电加热干燥机
CN102818432A (zh) * 2011-06-09 2012-12-12 上海福耀客车玻璃有限公司 一种利用余热的双层可单独控温的烘箱装置
CN103499188A (zh) * 2013-09-25 2014-01-08 都江堰申都中药有限公司 无湿气药材干燥箱
CN105457866A (zh) * 2016-01-08 2016-04-06 邬宏敏 一种热固性涂料的加热固化装置
CN105478317A (zh) * 2016-01-08 2016-04-13 邬宏敏 一种金属板涂层固化装置
CN107421253A (zh) * 2017-07-31 2017-12-01 合肥余塝电子商务有限公司 一种建筑建材物料烘干装置
CN111397319A (zh) * 2020-04-08 2020-07-10 陈辉 药材烘烤装置
CN112743506A (zh) * 2020-12-29 2021-05-04 广州义媛媛贸易有限公司 一种半导体陶瓷存放架
CN115123722A (zh) * 2022-07-12 2022-09-30 湖南汇特焊材科技有限公司 一种用于焊条生产的智能设备
CN115197576A (zh) * 2022-07-12 2022-10-18 苏州昌和应用材料有限公司 压合机用硅胶垫及其制造方法、热风循环烘箱
FR3140418A1 (fr) * 2022-09-30 2024-04-05 Matair Dispositif de régulation thermique destiné à une étuve de flux de soudure par procédé d’air chaud
CN118293651A (zh) * 2024-06-05 2024-07-05 江苏宏泰焊材有限公司 一种电焊焊条生产用热风循环烘干设备及方法

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
CN107843067A (zh) * 2017-10-13 2018-03-27 苏州睿鑫莱机电科技有限公司 一种工业恒温烤箱

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CH638032A5 (en) * 1979-02-22 1983-08-31 Paul Studer Device for drying bar-shaped welding electrodes
FR2574917A1 (fr) * 1984-12-19 1986-06-20 Boiron Lab Sa Installation de sechage, notamment pour les objets granuleux en vrac
US4621439A (en) * 1985-08-07 1986-11-11 Maw Chyi Chen Apparatus for speedy drying
FR2674944A1 (fr) * 1991-04-02 1992-10-09 Perrin Robert Installation pour le sechage de granules en matiere plastique en vue de leur alimentation dans une machine de transformation.
US6075226A (en) * 1998-10-20 2000-06-13 Kishbaugh; Daniel J. Portable holding oven for welding electrodes utilizing exhaust heat from welding machine
US20020003134A1 (en) * 2000-07-07 2002-01-10 Mark Podgurski Engine exhaust heated welding rod drying oven

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH638032A5 (en) * 1979-02-22 1983-08-31 Paul Studer Device for drying bar-shaped welding electrodes
FR2574917A1 (fr) * 1984-12-19 1986-06-20 Boiron Lab Sa Installation de sechage, notamment pour les objets granuleux en vrac
US4621439A (en) * 1985-08-07 1986-11-11 Maw Chyi Chen Apparatus for speedy drying
FR2674944A1 (fr) * 1991-04-02 1992-10-09 Perrin Robert Installation pour le sechage de granules en matiere plastique en vue de leur alimentation dans une machine de transformation.
US6075226A (en) * 1998-10-20 2000-06-13 Kishbaugh; Daniel J. Portable holding oven for welding electrodes utilizing exhaust heat from welding machine
US20020003134A1 (en) * 2000-07-07 2002-01-10 Mark Podgurski Engine exhaust heated welding rod drying oven

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101886872A (zh) * 2010-06-17 2010-11-17 深圳市山木电池科技有限公司 一种锂离子电池干燥的方法和装置
CN102818432A (zh) * 2011-06-09 2012-12-12 上海福耀客车玻璃有限公司 一种利用余热的双层可单独控温的烘箱装置
CN102564078A (zh) * 2011-11-25 2012-07-11 中国西电电气股份有限公司 一种电瓷湿坯电干燥装置及其方法
CN102645095A (zh) * 2012-05-14 2012-08-22 西安圣华电子工程有限责任公司 智能电加热干燥机
CN102645095B (zh) * 2012-05-14 2014-05-07 西安圣华农业科技股份有限公司 智能电加热干燥机
CN103499188A (zh) * 2013-09-25 2014-01-08 都江堰申都中药有限公司 无湿气药材干燥箱
CN105457866A (zh) * 2016-01-08 2016-04-06 邬宏敏 一种热固性涂料的加热固化装置
CN105478317A (zh) * 2016-01-08 2016-04-13 邬宏敏 一种金属板涂层固化装置
CN107421253A (zh) * 2017-07-31 2017-12-01 合肥余塝电子商务有限公司 一种建筑建材物料烘干装置
CN111397319A (zh) * 2020-04-08 2020-07-10 陈辉 药材烘烤装置
CN112743506A (zh) * 2020-12-29 2021-05-04 广州义媛媛贸易有限公司 一种半导体陶瓷存放架
CN115123722A (zh) * 2022-07-12 2022-09-30 湖南汇特焊材科技有限公司 一种用于焊条生产的智能设备
CN115197576A (zh) * 2022-07-12 2022-10-18 苏州昌和应用材料有限公司 压合机用硅胶垫及其制造方法、热风循环烘箱
CN115123722B (zh) * 2022-07-12 2024-01-16 湖南汇特焊材科技有限公司 一种用于焊条生产的智能设备
CN115197576B (zh) * 2022-07-12 2024-04-09 苏州昌和应用材料有限公司 压合机用硅胶垫及其制造方法、热风循环烘箱
FR3140418A1 (fr) * 2022-09-30 2024-04-05 Matair Dispositif de régulation thermique destiné à une étuve de flux de soudure par procédé d’air chaud
CN118293651A (zh) * 2024-06-05 2024-07-05 江苏宏泰焊材有限公司 一种电焊焊条生产用热风循环烘干设备及方法

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