JPH07143840A - Tray for bread baking - Google Patents

Abstract

PURPOSE:To provide the product capable of reducing the use of an oil for coating in a possible degree, on behalf of excellent releasability of pieces of bread and durability and keeping good releasability for a long time by forming a specific metal coating on the inner surface. CONSTITUTION:Formed pieces of bread dough are loaded on plural trays while circularly transferred by a conveyer, passed through an oven to bake bread and recover the baked bread to produce bread in a large scale, in a continuous manner. The objective product is produced by forming a metal coating by the coprecipitation dispersion of a fluorine-containing compound 4 in a metal matrix 3 coated on the inner surface of the main body 1 of a tray for baking bread, used for this process. A tetrafluoroethylene resin is as the fluorine- containing compound and Ni, etc., is as the metal matrix respectively preferable. Further, the metal coating may be formed by immersing the main body 1 of the tray in a metal plating liquid for forming metal matrix, after homogeneously dispersing particles of the fluorine-containing compound and carrying out metal plating.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bread baking tray used when a large amount of bread is continuously produced in a bakery factory. More specifically, the tray itself has excellent mold releasability from bread, Accordingly, the present invention relates to a bread baking tray that can reduce the amount of oil used as much as possible, solve various problems associated with oil application, and can efficiently perform bread production.

[0002]

2. Description of the Related Art Conventionally, in the case of producing a certain amount of bread in a bakery factory or the like, a number of bread baking trays are circulated and conveyed by a conveyor, and bread dough formed by a molding machine is continuously formed on the trays. After baking the bread by feeding it and passing it through the oven for a predetermined time, the method of continuously baking the bread by collecting the baked bread from the tray is adopted. ing.

[0003] In this case, as the bread baking tray, a tray made of a conventional steel tray with a silicone resin spray-coated to improve the mold releasability is generally used. Will stick to the surface of the tray, and when the bread is collected from the tray after baking, the shape of the bread will be lost and other problems will occur. Therefore, oil such as salad oil is applied to the surface of the tray to improve the mold release property between the bread and the tray. In this case, however, the effect of the applied oil is short-lived. After collecting, the tray surface is brush-washed each time, and oil is applied again before the bread dough is supplied.

[0004]

However, in the case of making bread in this manner, the brush cleaning carried out each time the bread is baked invades the silicone resin film on the inner surface of the tray and impairs the function of the film. Therefore, it is necessary to re-treat the tray with the silicone resin every time the tray is used several hundred times.

Further, the conventional tray described above requires oil application because it has insufficient releasability from the pan, but if cleaning of this oil component is insufficient, oxidized oil adheres to the pan. There is also the risk of degrading the commercial value.

The present invention has been made in view of the above circumstances and is excellent in releasability from baked bread, and can reduce the amount of coating oil used as much as possible and is excellent in durability. It is an object of the present invention to provide a tray for bread baking that can maintain excellent mold releasability for a long time.

[0007]

MEANS TO SOLVE THE PROBLEMS As a result of intensive studies for achieving the above-mentioned object, the present inventor has found that the inner surface of a tray for baking bread made of steel or the like is made of nickel or nickel alloy. By forming a composite plating film in which fluorine-containing compound particles such as PTFE are co-deposited in the matrix, excellent releasability is obtained, and the amount of coating oil used is reduced as much as possible when baking. In some cases, it is possible to perform pan baking without using oil, and the composite plating film does not cause a problem in food hygiene, and is excellent in heat resistance and abrasion resistance and good. Since it has excellent durability, it can maintain excellent releasability for a long time. Therefore, by using this tray to produce a large amount of bread in a line, the amount of applied oil can be reduced, and Resulting simplified Leh washing process, yet it is possible to reduce the reprocessing number of trays, found that it is possible to greatly improve the production efficiency of the pan, and completed the present invention.

Therefore, according to the present invention, a plurality of trays are circulated and conveyed by a conveyor, and the bread dough formed is continuously placed on the trays, and the bread dough is passed through an oven for baking, and then the baked bread is baked. It is a tray for bread baking used in the continuous production of a large amount of bread by continuously recovering, by forming a plating film on which the fluorine-containing compound particles are co-deposited on the inner surface. The present invention provides a tray for bread baking.

The present invention will be described in more detail below.
As described above, the bread baking tray of the present invention has a plating film formed by eutectoid particles of a fluorine-containing compound on the inner surface thereof. Specifically, as shown in FIG. 1 is a composite plating film 2 in which fluorine-containing compound particles are co-deposited on the inner surface of 1.

In this case, as shown in FIG. 2, in the composite plating film 2, the fluorine-containing compound particles 4 are uniformly dispersed in the metal matrix 3, and the fluorine-containing compound particles 4 are formed.
Is partly exposed on the surface of the plating film 2.

The tray body 1 may be made of steel, copper, aluminum, stainless steel, or any other metal used as a baking tray, but is usually steel or stainless steel. Etc. are common. Further, the tray body 1 having a multi-layered structure in which a plurality of metals are laminated can also be used, and the shape of the tray body 1 may be a quadrangle, a circle, an ellipse, or the like, depending on the shape of a conveyor or oven for carrying, the shape of a carrying line, or the like. Can be selected as appropriate.

Next, the metal matrix 3 of the plating film 2 is not particularly limited as long as it can be formed by a plating treatment, and an appropriate metal can be selected. Nickel alloy coatings such as nickel-cobalt alloys, nickel-phosphorus alloys and nickel-boron alloys are preferably used because they have excellent heat resistance and surface hardness.

The fluorine-containing compound particles 4 to be co-deposited and dispersed in the metal matrix 3 are tetrafluoroethylene resin (PTFE), tetrafluoroethylene-6-propylene propylene copolymer resin (FEP), tetrafluoroethylene. -Perfluoroalkyl vinyl ether copolymer resin (PFA),
Tetrafluoroethylene-ethylene copolymer resin (ETFE),
Trifluorochloroethylene resin (PCTFE), vinylidene fluoride resin (PVDF), vinyl fluoride resin (PVF)
Fluorine resin particles such as fluorinated graphite particles and fluorinated graphite particles can be used alone or in combination, but tetrafluoroethylene resin (PTFE) particles are particularly preferably used in terms of dispersibility and releasability. To be This fluorine-containing compound particle 4
The particle diameter of is not particularly limited, but is preferably 1 μm or less, and particularly preferably 0.2 to 0.5 μm. If necessary, other inorganic or organic polymer particles may be co-deposited in addition to the fluorine-containing compound particles.

As a method for forming the composite plating film 2 in which the fluorine-containing compound particles 4 are eutectoidally dispersed in the metal matrix 3, either an electroplating method or an electroless plating method may be used. Can be adopted.
Specifically, if necessary, the fluorine-containing compound particles 4 are uniformly dispersed in a plating solution for forming the metal matrix 3 by using a surface active agent such as a fluorine-based surfactant, and the tray body is contained in the plating solution. 1 is dipped and electroplating or electroless plating is performed.

In this case, the amount of the fluorine-containing compound particles 4 dispersed in the plating solution is not particularly limited,
0.1 to 500 g / L, particularly 10 to 200 g / L is preferable, and in this case, although not particularly limited, the eutectoid amount of the fluorine-containing compound particles 4 in the obtained composite plating film 2 is 15-45% by volume, especially 30-45
It is preferable to set it to the volume%. It should be noted that known additives such as a brightening agent can be added to the plating solution, and particularly in the case of electric nickel or nickel alloy plating, the Vickers hardness can be improved by adding the brightening agent. Added Vickers hardness of 400
With the above, more excellent effects can be obtained. The plating conditions can be set as usual.

Examples of suitable plating solutions and plating conditions for forming the composite plating film in which the above-mentioned fluorine-containing compound particles are co-deposited include the plating solutions and plating conditions having the following compositions. (Example 1) electroplating plating solution composition, plating conditions _{NiSO 4 · 6H 2 O 280g /} L NiCl 2 · 6H 2 O 45g / L H 3 BO 3 40g / L fluorosurfactant 0.3 g / L brightener 2g / L PTFE particles 50 g / L pH 4.0-4.5 Plating temperature 55 ° C. Cathode current density 3-4 A / dm ² Anode nickel stirring Propeller stirring (Example 2) Electroplating plating composition, plating conditions Nickel sulfamate 450 g / L NiCl ₂ .6H ₂ O 30 g / L H ₃ BO ₃ 35 g / L Fluorosurfactant 0.3 g / L Brightener 2 g / L PTFE particles 100 g / L pH 4.2 Plating temperature 42 ° C. Cathode current density 2 A / dm ² anode nickel stirring propeller stirrer Further, when the electroless plating is sodium hypophosphite and the reducing agent, PTFE particles (average particle size 0.2μ
It is possible to perform plating under the condition of a bath temperature of 90 ° C. using a commercially available electroless nickel-phosphorus-fluorine resin composite plating solution (Nimflon manufactured by Uemura Kogyo Co., Ltd.) in which m) is dispersed. As a result, it is possible to form a Ni-P alloy plating film in which PTFE particles are uniformly eutectoidally dispersed at a ratio of about 15 to 40% by volume.

Further, in the case of a composite plating film in which fluororesin particles such as tetrafluoroethylene resin (PTEF) are co-deposited as the fluorine-containing compound particles 4, the composite plating film is subjected to a heat treatment and plated. By softening or melting the fluororesin particles 6 exposed on the surface of the coating 2,
As shown in, part or all of the plating film 2 can be covered with a fluororesin. As described above, by covering a part or all of the surface of the plating film 2 with the fluororesin by softening and melting the fluororesin particles, it is possible to better prevent the sticking of the bread. Further, the fluorine compound particle eutectoid plating film 2 can be polished, and can be polished if necessary.

[0018]

EXAMPLES The present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited to the following Examples. [Example] Bread tray made of steel (square 600 x
(600 mm) was plated under the following conditions using a plating solution having the following composition to form a nickel plating film in which PTFE was dispersed and co-deposited on the inner surface of the tray. The thickness of the obtained plating film was 10 μm, the amount of PTFE co-deposited was 40% by volume, and the surface Vickers hardness was 35 HV.

Plating solution composition, plating conditions Nickel sulfamate 450 g / L NiCl ₂ .6H ₂ O 30 g / L H ₃ BO ₃ 35 g / L Fluorine-based surfactant 0.3 g / L Brightener 2 g / L PTFE particles (average Particle diameter 0.3 μm) 100 g / L pH 4.2 Plating temperature 42 ° C. Cathode current density 2 A / dm ² Anode nickel Stirring propeller stirring

Using the obtained bread baking tray, baking was repeated under three conditions: 80 g of oil (commercial salad oil), 20 g of oil, and no oil was used, and the number of times of use until a defective molding of bread occurred during collection was examined. It was The results are shown in Table 1.

Comparative Example 50 g of a silicone resin was uniformly spray-coated on the inner surface of a steel baking tray (square 600 × 600 mm), and a baking test similar to that of the example was conducted. The results are shown in Table 1.

[0022]

[Table 1]

From the results shown in Table 1, the bread baking tray of the present invention has excellent releasability from baked bread, can reduce the amount of coating oil used as much as possible, and is excellent in durability. It was confirmed that good releasability can be maintained for a long period of time.

[0024]

As explained above, the tray for baking bread of the present invention is excellent in mold releasability of the tray itself for baked bread, and the amount of oil used can be reduced as much as possible.
When a large amount of bread is continuously produced in a bakery factory or the like, various problems associated with oil application can be solved and the bread can be efficiently produced.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing an example of a bread baking tray of the present invention.

FIG. 2 is a partially enlarged sectional view showing the bread baking tray.

FIG. 3 is a partially enlarged sectional view showing another example of the bread baking tray of the present invention.

[Explanation of symbols]

 1 Tray body 2 Plating film 3 Metal matrix 4 Fluorine-containing compound particles

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Satoshi Chiba, 1-5-1, Exit, Hirakata, Osaka Prefecture, Central Research Laboratory, Uemura Industrial Co., Ltd. 2 Tokyo branch of Uemura Industrial Co., Ltd.

Claims (1)

[Claims] 1. A plurality of trays are circulated and conveyed by a conveyor, and the formed bread dough is continuously placed on the trays, passed through an oven for baking, and then the baked bread is continuously fed. By collecting, a bread baking tray used when continuously manufacturing a large amount of bread, characterized in that it forms a plating film co-deposited particles of a fluorine-containing compound on the inner surface A tray for baking bread.