UNCOATED PRESSED NON-STICK COOKWARE

Abstract

The uncoated pressed non-stick cookware, comprising an uncoated stainless-steel or uncoated titanium cookware body having a food contact surface, on which pits are uniformly distributed, wherein the pits have an aperture of 0.1-0.5 mm, wherein the area of the pits accounts for 15%-40% of the area of the entire cookware body.

Claims

1. The uncoated pressed non-stick cookware, comprising an uncoated stainless-steel or uncoated titanium cookware body having a food contact surface, on which pits are uniformly distributed, wherein the pits have an aperture of 0.1-0.5 mm, and a distance between pit centers of 0.3-2 mm, and a depth of 0.1-0.3 mm.

2. The uncoated pressed non-stick cookware according to claim 1, wherein the area of the pits accounts for 15%-40% of the area of the entire cookware body.

3. The uncoated pressed non-stick cookware according to claim 1, wherein the pits are round or polygonal, and are gradually sunken from a plane.

4. The uncoated pressed non-stick cookware according to claim 1, wherein the pits have an aperture of 0.3-0.5 mm.

5. The uncoated pressed non-stick cookware according to claim 1, wherein a food contact layer on the cookware body is stainless steel or uncoated titanium, the back of which is provided with a composite aluminum layer.

6. The uncoated pressed non-stick cookware according to claim 1, wherein a food contact layer on the cookware body is provided with a titanium-or zirconium-plated layer, which has a thickness of 20-200 nm.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below with reference to the following accompanying drawings:

[0014] FIG. 1 is a schematic diagram showing the distribution of pits in a cookware body according to an embodiment of the present invention; and

[0015] FIG. 2 is a microphotograph of pits after the preparation of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numbers indicate the same objects all the way. FIG. 1 shows a cookware body surface 1 and pits 2. As shown in the microphotograph in FIG. 2, this embodiment relates to an uncoated pressed non-stick cookware, on which the pits 2 with consistent depth are preferably uniformly distributed. The pits may also be distributed more closely at the bottom of the cookware than at the edge of the cookware. The cookware body surface 1 is present between two adjacent pits.

[0017] In a further solution, the pits have a diameter of 200 um, 300 um, 400 um or 500 um, and the width of the surface between the pits is 100-400 um. The pits are prepared under the pressing of a pressure device by means of a mold prepared from a hard alloy, such that the obtained pits and cookware body are both of a hardened layer structure. The mold prepared from the hard alloy and having uniformly distributed round or polygonal raised heads presses a plate of the cookware body to form the pits uniformly distributed on the cookware body. Since the mold is provided with the uniformly distributed round raised heads (round head pins) that correspond to the pits in the cookware body, the round raised heads designed on the mold can control the distribution of the pits to allow the distance between the centers of the pits to be 0.6-2 mm, such that the distance between the edges of adjacent pits is controlled to 0.3-1.8 mm, and the depth of each pit is in particular 0.1-0.18 mm.

[0018] The total area of the pits 2 accounts for 15%-40% (for example, 15%, 20%, 35%, or 40% as in the embodiments of the present invention) of the area of the entire region. Then, both the physical non-stick performance and the service life of the entire non-stick cookware can be ensured.

[0019] Food contact layer on the cookware body is stainless steel or uncoated titanium layer (0.5 mm), the back of which is provided with a composite aluminum layer (1.5 mm).

[0020] The pits, concave holes, are round or polygonal, and the polygonal pits correspond to polygonal raised convex heads uniformly prepared on the mold. The pits are gradually indented from a flat surface.

[0021] The body plate of the cookware is in the shape of a concave cookware, which is formed from a flat plate pressed by a hydraulic pressing equipment. The cookware body is connected with a cookware handle. The back of the stainless steel or titanium material is compounded with an aluminum layer. When compounding the pot body material, the thickness of the stainless steel or titanium material is about 0.5 mm, and the aluminum layer is about 1.5 mm; stainless steel or titanium is combined with an aluminum plate by means of pressing or explosive compounding.

[0022] Although the embodiments of the present invention have been illustrated and described above, it should be understood that the embodiments above are exemplary, and are not intended to limit the present invention. Without departing from the principle and intention of the present invention, those skilled in the art may make alternations, modifications, substitutions, and variations to the embodiments above within the scope of the present invention.