RU2841846C1 - Method of manufacturing kitchen spatula - Google Patents

Abstract

FIELD: food industry.

SUBSTANCE: invention relates to food industry, in particular, to a method for manufacturing a spatula for a kitchen. Method comprises making a spatula with working and non-working parts and a handle from a stainless alloy, attaching the handle to the spatula and making a thermal insulation of the handle, wherein spatula workpiece from sheet with thickness h is cut using grinder and non-working part is formed in form of truncated isosceles triangle with section width E, then it at angle α bent to working part; handle frame is made from same alloy, forming one end d' by symmetrical bending of rod with diameter d, other end is formed in form of two beams of isosceles triangle each with length l, wherein along axis of beams parallel to plane of handle through grooves are made with width h and depth l'; handle is installed on non-working part of spatula so that between triangles on both sides there are gaps with value δ, fixing the handle on the spatula and drilling in the beams, retreating from each edge on b, perpendicular to the plane of the handle, by two through holes with diameter d'' in each, arranging them symmetrically relative to axis of symmetry of handle O-O', inserting into rivet holes and performing handle riveting to spatula, after which handle fixation is removed and heat insulation is made on it.

EFFECT: possibility of making spatula for the kitchen, having high reliability, strength and ability to preserve consumer properties for many years; pleasant design: a splendid waist and a beautiful and reliable thermal insulation of the handle; possibility of their production in house conditions, low manufacturing cost.

3 cl, 2 dwg

Description

The invention relates to the food industry and can be used to make food spatulas at home. There are known methods for making kitchen spatulas by stamping blanks of spatulas from a stainless steel sheet with working and non-working parts, followed by soldering or welding to the non-working part of the spatula a handle in the form of a stainless steel rod covered with thermal insulation made of carbolite in the form of a cylinder or rectangle. The method is simple and technological, but cannot be implemented at home.

The closest to the declared method is the method of manufacturing forks according to the Russian Federation patent [1]. It will be used as a prototype, since some technological transitions in it coincide with similar ones in the manufacture of a blade according to the proposed method, but there are also significant differences.

The objectives of the invention are to create a method for manufacturing durable, elegant, reliable and inexpensive kitchen spatulas that can be implemented at home.

The objectives are achieved by cutting the blade blank from a sheet of thickness h using a grinder and forming the non-working part in the form of a truncated isosceles triangle with a section width of E, then bending it at an angle α towards the working part; making the frame of the handle from the same alloy, forming one end d' by symmetrically bending a rod of diameter d, the other end is formed in the form of two rays of an isosceles triangle of length l each, while through grooves of width h and depth l' are made along the axis of the rays parallel to the plane of the handle; the handle is installed on the non-working part of the blade so that there are gaps of size δ between the triangles on both sides, the handle is fixed on the blade and two k through holes of diameter d'' are drilled in the rays, retreating from the edge of each by b, perpendicular to the plane of the handle, in each, arranging them symmetrically relative to the axis of symmetry O-O', rivets are inserted into the holes and the handle is riveted to the blade, after which the handle is removed from the fixation and thermal insulation is made on it; and also by the fact that rivets made of wire of the same alloy of diameter d'' are used to attach the d'' handle to the blade, and by the fact that thermal insulation is produced by continuous winding of telephone wire on the frame of the handle, starting from its narrow part, and, after the end of the winding, the ends of the conductors are joined into knots by soldering and they are removed with the ends of the wire into the cavity formed during the winding of the wire.

Fig. 1a shows a general front view of a kitchen spatula, Fig. 1b is a top view of the same spatula. The following designations are used in the figures: 1 - body of the spatula with a working I and non-working part II in the shape of a truncated, isosceles triangle; 2 - handle, fastened to the non-working part of the spatula with 4 rivets (1', 2', 3', 4'); 3 - thermal insulation in the form of a continuous winding of telephone wire on the handle; h - sheet thickness 0.7-0.8 mm and width of grooves in two rays of the handle; A - length of the working part of the spatula 100 mm; G - width of its front part 40 mm; D - width of its rear part 50 mm; B - length of the non-working part of the spatula 28 mm; E - width of the triangle section 22 mm α - angle between the working and non-working parts of the spatula 25±1°; d - diameter of the rod 4-5 mm, from which the handle is formed; B - length of the handle 170 mm; W - width of the narrow part of the handle 14 mm; l - length of the rays of the isosceles triangle of the handle 30 mm; l' - depth of the grooves in the rays of the handle 28 mm; d''=1 mm through holes in the non-working part of the blade and the rays at a distance of b=5 mm from their edges and the diameter of the rivets; l'' - similar length of rivets 6 mm (not shown in the figures); (O-O') - longitudinal axis of symmetry of the blade.

The method is implemented as follows: a blade blank 128 mm long is cut out with a grinder from an alloy sheet, for example, 44NHTYu, 0.7-0.8 mm thick. Burrs are removed with a file and roundings r = 5 mm are made on the front edge of the blade. The non-working part of the blade is bent relative to the working part at an angle of α = 25±1°. A handle is formed from a rod of the same alloy d = 4-5 mm, for this purpose a rod 320 mm long is bent in half on a mandrel d = 10 mm (not shown) and its ends are clamped in a vice and grooves 0.7-0.8 mm wide and 28 mm deep are formed in the center of the rods parallel to the plane of the handle, then a narrow part of the handle of 14 mm is formed and clamped, then the ends of the rod 30 mm long are moved apart at an angle of 60°, forming two rays of an isosceles triangle. Using the grooves, install the handle on the non-working part of the blade so that there are gaps of δ 1 mm between the triangles on both sides and using a clamp, placing it in the middle between the beams, fix them on the non-working part of the blade and then in each beam, retreating from the edges by 5 mm, drill two through holes d = 1 mm, insert 4 rivets d = 1 mm, 6 mm long into the holes and rive the handle to the blade, after which remove the fixation. Then produce thermal insulation of the handle by continuous winding on the frame of the handle, above its narrow part by 10 mm, a telephone wire ~ 800 mm long and, after its completion, the ends of the wires are soldered together into knots and together with the ends of the wire are removed into the cavity of the handle (not shown in the figures), which is formed after winding the wire.

In comparison with known ones, kitchen spatulas made using the proposed method have the following advantages:

1. Elegant design with graceful waist and beautiful thermal insulation of the handle.

2. Reliability, high strength and preservation of consumer properties for many years.

3. Possibility of making inexpensive blades at home. Source of information accepted during the examination:

1. Russian Federation Patent No. 2817731 IPC A47Zh 21/00, BI No. 11 dated 19.04.2024.

Claims (3)

1. A method for manufacturing a kitchen spatula, comprising manufacturing a spatula with a working and non-working part and a handle from a stainless alloy, attaching the handle to the spatula and manufacturing thermal insulation for the handle, characterized in that the spatula blank is cut out of a sheet of thickness h using a grinder and the non-working part is formed in the form of a truncated isosceles triangle with a cross-section width E, then it is bent at an angle α toward the working part; the frame of the handle is made from the same alloy, forming one end d' by symmetrically bending a rod with a diameter d, the other end is formed in the form of two rays of an isosceles triangle of length l each, while through grooves of width h and depth l' are made along the axis of the rays parallel to the plane of the handle; the handle is installed on the non-working part of the blade so that there are gaps of size δ between the triangles on both sides, the handle is fixed on the blade and two through holes of diameter d'' are drilled in the rays, stepping back from each edge by b, perpendicular to the plane of the handle, placing them symmetrically relative to the axis of symmetry of the handle O-O', rivets are inserted into the holes and the handle is riveted to the blade, after which the handle is removed from the fixation and thermal insulation is made on it. 2. The manufacturing method according to paragraph 1, characterized in that rivets made of wire of the same alloy with a diameter of d'' are used to attach the handle to the blade. 3. The manufacturing method according to paragraph 1, characterized in that thermal insulation is produced by continuous winding of a telephone wire onto the frame of the handle, starting from its narrow part, and, after winding is complete, the ends of the conductors are joined into knots by soldering and they are removed with the ends of the wire into the cavity formed during the winding of the wire.