Preparation method of pressure cooker body and extrusion die thereof

Abstract

The invention discloses a preparation method of a pressure cooker body and an extrusion die thereof. The preparation method of the pressure cooker body comprises the steps that (1), a metal material sheet is made into a cooker body blank with a cooker bottom, a cooker wall and a cooker edge through first-time drawing molding; (2), extrusion molding is conducted on the cooker bottom of the cooker body blank through the extrusion die, multiple ribs used for increasing the heat conduction area and improving the cooker bottom strength are distributed on the outer surface of the cooker bottom in aconvex mode, and a flow guiding groove is formed between every two adjacent ribs; (3), second-time thinning drawing is conducted on the cooker wall; (4), a tooth incising technology is conducted on the outer side of the cooker edge; (5), surface oxidizing is conducted; and (6), a polishing technology is conducted. The invention further discloses the extrusion die. According to the preparation method of the pressure cooker body and the extrusion die thereof, the preparation technology is simple and reasonable, the cooker bottom thickness and strength are greatly improved on the basis that raw materials are not increased, deformation is not prone to occurring, and the problem that in the using process of a pressure cooker, the bottom is convex outwards is solved; and meanwhile, the heat conduction area is increased, the heat transfer property is improved, and energy is better saved in use.

Description

technical field [0001] The invention relates to a kitchen cooker, in particular to a method for preparing a pressure cooker body and related molds. Background technique [0002] A pressure cooker, also known as a pressure cooker, is an energy-saving cooking pot. The pressure cooker uses the physical phenomenon that the boiling point of the liquid will increase at a higher pressure, and puts pressure on the water so that the water can reach a higher temperature without boiling, so as to speed up the efficiency of stewing food. It can be used to heat the cooked food to above 100°C. In high altitude areas, the pressure cooker can avoid the problem that the boiling point of water is lowered and the food is not easy to cook. The advantage of the pressure cooker is that not only the cooking time is short, but also the cooked food tastes good, especially the meat that is not easy to cook becomes easy to cook and tastes good. [0003] Most of the pot bodies of existing pressure co...

AI Technical Summary

Problems solved by technology

At present, many aluminum alloy pressure cookers on the market are prepared by casting, and the processing cost is relatively high; there is also a method of stamping and stretching. Stamping and stretching is to directly stretch the set aluminum plate into a pot blank. Compared with casting molding, the use of aluminum alloy materials is saved, but the thickness of the bottom and side walls of the processed pots is equal, and it is impossible to make pots with thick bottoms and thin walls

[0004] The working pressure of the existing pressure cooker is usually about 80KPa, and the failure pressure is about 500KPa. The bottom is generally smooth, and the heat conduction area is not large, and because the bottom of the pot is easily deformed under high pressure, there is usually a convex bottom in use. question

In order to solve the problem of deformation of the bottom of the pot body and increase the strength of the bottom of the pot, it is necessary to thicken the bottom of the pot, which will increase the raw materials and increase the cost

Images