Die-casting compound bottom kettle and manufacturing method thereof

Abstract

The invention relates to a die casting double bottom pan, which comprises an aluminum alloy pan body and double bottom sheets that are combined with the lower part of the pan body as a whole in a die-casting way, and is characterized in that the double bottom sheet is formed by roll-binding composite material sheets and stainless iron sheets; the composite material sheet is provided with a plurality of ring-shaped grooves; at least one lateral wall of the ring-shaped groove is an inner oblique lateral wall; the composite material sheet is made of pure aluminum or the aluminum alloy or other materials, the expansion coefficient of the which is close to that of the aluminum alloy. The invention also relates to the manufacturing technique of the die casting double bottom pan. The die castingdouble bottom pan is manufactured by steps of making the double bottom sheet, placing the stainless iron double bottom sheets, die casting, surface treating, etc. The die casting double bottom pan has the advantages of firm connection of the double bottom sheets, high heat efficiency, good anti-thermal fatigability, simple manufacturing technique, and the like, which is a cooker that is especially suitable to be used on induction cookers.

Description

technical field [0001] The invention relates to a die-cast double-bottom pot and its manufacturing process. Background technique [0002] At present, most of the double-bottomed pots that can be used in induction cookers are mechanically riveted double-bottomed pots that use machinery to extrude the stainless iron bottom sheet and the pot body. , there are riveted through holes on the stainless iron base, the actual effective area of ​​the metal part that generates eddy current at the bottom is small, so the thermal efficiency is low, and there are defects such as complex manufacturing of molds and parts, and poor connection strength; the stainless iron base Unevenness not only affects the appearance, but also causes damage to the surface of the induction cooker. Thereby, the Chinese utility model patent that the patent application number is 200720127832.5 discloses a kind of die-casting double bottom pan, and it is to have blind hole on the stainless iron double bottom she...

AI Technical Summary

Problems solved by technology

Because it relies on the convex column formed by the aluminum liquid filled in the blind hole to connect the compound bottom and the pot body together, if the compound bottom is thinner, the depth of the blind hole is shallower, and the connection between the compound bottom and the pot body The strength is low; if the composite negative is thicker, there will undoubtedly be a disadvantage of high production costs

In addition, the connection between the double bottom plate and the pot body of the double bottom pot mainly depends on the convex column formed in the blind hole. Due to the different thermal expansion coefficients of aluminum alloy and stainless steel, the double bottom pot is resistant to heat and cold under the alternating action of cold and heat. Lower thermal fatigue performance will undoubtedly affect its service life

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