Surface printing process for quick-frozen glue pudding

Abstract

The invention relates to the technical field of food processing, in particular to a quick-frozen glue pudding surface printing process which at least comprises the steps of glue pudding making, inspection, printing, quick freezing, packaging and cold storage. In the quick-freezing step, a quick-freezing machine is adopted for treatment, and the temperature is controlled to be-32 to-35 DEG C. According to the surface printing process for the quick-frozen glue pudding, the glue pudding is subjected to quick-freezing treatment after printing, so that the glue pudding is good in printing effect and clear and complete in pattern, and the phenomena of fuzzy pattern and excessive color fading cannot occur after the glue pudding is boiled in water at high temperature.

Description

Technical Field

[0001] The invention relates to the technical field of food processing, and in particular to a surface printing process for quick-frozen glutinous rice balls. Background Art

[0002] Glutinous Rice Balls are the most representative food of traditional Chinese festivals, and printing on the surface of glutinous rice balls to enhance their appearance is a production method currently adopted by most manufacturers.

[0003] CN2862721Y discloses a glutinous rice dumpling or Chinese rice dumpling with a substrate with patterns or text embedded on the surface, wherein the outer surface of the skin is embedded with an edible substrate, and a two-dimensional or three-dimensional pattern layer consisting of edible ink, vegetable juice or fruit juice, or a two-dimensional or three-dimensional text layer consisting of edible ink, vegetable juice or fruit juice, or a combined layer consisting of the two-dimensional or three-dimensional pattern and the two-dimensional or three-dimensional text is arranged on the substrate. However, the printing effect of this method is not ideal.

[0004] The existing printing process is to print directly on the surface of the finished glutinous rice balls with printing equipment. However, because the ink is water-based, it is easy to spread on the surface of the glutinous rice balls, often causing the surface pattern of the glutinous rice balls to be deformed and blurred. When the glutinous rice balls are boiled in water, the ink color will further diffuse and dissolve into the water, causing the printed pattern to be blurred and incomplete, and the visual effect is poor. Summary of the invention

[0005] In order to solve the problems in the prior art, the present invention provides a surface printing process for quick-frozen glutinous rice balls, which at least includes the steps of making glutinous rice balls, inspecting, printing, quick freezing, and packaging and refrigeration; the quick freezing step is carried out using a quick freezing machine, and the temperature is controlled at -32 to -35°C.

[0006] In one embodiment, the steps of making glutinous rice balls include: putting dough into rice flour dough and rolling it into a round shape, kneading it into a hollow semi-spherical shape with a thick middle and thin edges, wrapping the filling inside, and then closing and shrinking the opening, sealing it, pinching off the dough head, and rolling it into a round shape.

[0007] In one embodiment, the sizes of the glutinous rice balls are required to be uniform, and the sealing parts of the glutinous rice balls are required to be seamless.

[0008] In one embodiment, the printing step includes: using an inkjet printing device to print a customized pattern on the rice dumplings.

[0009] In one embodiment, the printing height of the inkjet printing device is 7-9 mm, and the printing speed is 15-25 m / min.

[0010] In one embodiment, the printing height of the inkjet printing device is 8 mm and the printing speed is 20 m / min.

[0011] In one embodiment, the inkjet printing device uses the 511-B printing machine of Wuhan Shanyin Technology Co., Ltd.

[0012] In one embodiment, the inkjet printing device uses edible printing ink to print patterns; the edible natural ink is Shanyin EP3812M produced by Wuhan Shanyin Technology Co., Ltd.

[0013] In one embodiment, the quick freezer in the quick freezing step includes any one of a tunnel quick freezer, a spiral quick freezer, a lifting quick freezer, and a push-type quick freezer.

[0014] In one embodiment, the temperature in the quick freezing step is controlled at -33°C.

[0015] In one embodiment, the quick freezing step includes: placing the printed glutinous rice balls into a freezing tray and sending them into a tunnel quick freezer for quick freezing, with the temperature controlled at -33°C.

[0016] In one embodiment, the freezing time in the quick freezing step is controlled within 15 to 30 minutes.

[0017] In one embodiment, the freezing time in the quick freezing step is controlled at 20 minutes.

[0018] In one embodiment, the printed glutinous rice balls are subjected to a quick freezing step within 10 seconds.

[0019] The present application unexpectedly discovered that when the printed glutinous rice balls are quick-frozen within 10 seconds, and the quick-freezing temperature is controlled at -32 to -35°C, the printing effect of the glutinous rice balls can be guaranteed to be good, the pattern is clear and complete, and the glutinous rice balls will not be blurred or faded excessively after being boiled in high-temperature water. When the glutinous rice balls are quick-frozen more than 10 seconds after printing, the ink will melt into the glutinous rice balls before quick freezing, causing the ink to diffuse and the pattern to become blurred; when the quick-freezing temperature is inappropriate, for example, the glutinous rice balls will be frozen and cracked below -35°C, and the printing will diffuse and cause the pattern to become blurred if it is processed above -32°C.

[0020] In one embodiment, the refrigeration temperature in the packaging and refrigeration step is controlled at -17 to -19°C.

[0021] In one embodiment, the refrigeration temperature in the packaging and refrigeration step is controlled at -18°C.

[0022] Beneficial Effects

[0023] 1. The present invention uses a special boiling-resistant edible printing ink to print patterns on glutinous rice balls, which can effectively improve the printing effect and obtain clear printed patterns.

[0024] 2. The surface printing process of the quick-frozen glutinous rice balls provided by the present invention can ensure that the printing effect of the glutinous rice balls is good, the patterns are clear and complete, and the patterns will not be blurred or faded excessively after the glutinous rice balls are boiled in high-temperature water.

[0025] 3. The present invention controls the quick freezing of the printed glutinous rice balls within 10 seconds, thereby preventing the ink from melting into the glutinous rice balls before quick freezing, causing the ink to diffuse and the pattern to be blurred.

[0026] 4. The present invention controls the temperature of the quick freezing process to -32 to -35°C, which can prevent the phenomenon of blurred patterns caused by the diffusion of printing.

[0027] 5. The surface printing process of the quick-frozen glutinous rice balls provided by the present invention is simple, can be applied to industrial production, and has higher practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a real shot of the surface printing of the quick-frozen glutinous rice balls prepared in Example 1.

[0029] Figure 2 This is a real shot of the surface printing of the quick-frozen glutinous rice balls prepared in comparative example 1.

[0030] Figure 3 This is a real shot of the surface printing of the quick-frozen glutinous rice balls prepared in comparative example 2.

[0031] Figure 4 This is a real shot of the surface printing of the quick-frozen glutinous rice balls prepared in comparative example 3. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the examples and drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. The experimental methods in the embodiments where specific conditions are not specified are carried out under conventional conditions or conditions recommended by the manufacturer. The raw materials or instruments used where the manufacturer is not specified are all conventional products that can be purchased commercially.

[0033] Example 1

[0034] The present embodiment provides a process for printing the surface of quick-frozen glutinous rice balls, including the steps of making glutinous rice balls, inspecting, printing, quick freezing, and packaging and refrigerating; the quick freezing step is performed using a tunnel quick freezer, and the temperature is controlled at -33°C.

[0035] The steps of making the glutinous rice balls include: putting dough into the rice flour dough, rolling it into a round shape, kneading it into a hollow semi-spherical shape with a thick middle and thin edges, wrapping the stuffing inside, closing and shrinking the mouth, sealing it, pinching off the dough head, and rolling it into a round shape.

[0036] The sizes of the glutinous rice balls are required to be uniform, and the sealing parts of the glutinous rice balls are required to be seamless.

[0037] The printing step includes: using an inkjet printing device to print a customized pattern on the glutinous rice balls.

[0038] The printing height of the inkjet printing device is 8 mm, and the printing speed is 20 m / min.

[0039] The inkjet printing device adopts the 511-B printing machine of Wuhan Shanyin Technology Co., Ltd.

[0040] The inkjet printing device uses edible printing ink to print patterns; the edible natural ink is the Shanyin EP3812M produced by Wuhan Shanyin Technology Co., Ltd.

[0041] The quick freezing step comprises: putting the printed glutinous rice balls into a freezing plate and sending them into a tunnel quick freezing machine for quick freezing, and the temperature is controlled at -33°C.

[0042] The freezing time in the quick freezing step is controlled at 20 minutes.

[0043] The printed glutinous rice balls should be quickly frozen within 10 seconds.

[0044] The refrigeration temperature in the packaging and refrigeration step is controlled at -18°C.

[0045] Figure 1 This is a real shot of the surface printing of the quick-frozen glutinous rice balls prepared in Example 1.

[0046] Comparative Example 1

[0047] The present embodiment provides a process for printing the surface of quick-frozen glutinous rice balls, including the steps of making glutinous rice balls, inspecting, printing, and packaging and refrigerating.

[0048] The steps of making the glutinous rice balls include: putting dough into the rice flour dough, rolling it into a round shape, kneading it into a hollow semi-spherical shape with a thick middle and thin edges, wrapping the stuffing inside, closing and shrinking the mouth, sealing it, pinching off the dough head, and rolling it into a round shape.

[0049] The sizes of the glutinous rice balls are required to be uniform, and the sealing parts of the glutinous rice balls are required to be seamless.

[0050] The printing step includes: using an inkjet printing device to print a customized pattern on the glutinous rice balls.

[0051] The printing height of the inkjet printing device is 8 mm, and the printing speed is 20 m / min.

[0052] The inkjet printing device adopts the 511-B printing machine of Wuhan Shanyin Technology Co., Ltd.

[0053] The inkjet printing device uses edible printing ink to print patterns; the edible natural ink is the Shanyin EP3812M produced by Wuhan Shanyin Technology Co., Ltd.

[0054] The refrigeration temperature in the packaging and refrigeration step is controlled at -18°C.

[0055] Figure 2 This is a real shot of the surface printing of the quick-frozen glutinous rice balls prepared in comparative example 1.

[0056] Comparative Example 2

[0057] The present embodiment provides a process for printing the surface of quick-frozen glutinous rice balls, including the steps of making glutinous rice balls, inspecting, printing, quick freezing, and packaging and refrigerating; the quick freezing step is performed using a tunnel quick freezer, and the temperature is controlled at -38°C.

[0058] The steps of making the glutinous rice balls include: putting dough into the rice flour dough, rolling it into a round shape, kneading it into a hollow semi-spherical shape with a thick middle and thin edges, wrapping the stuffing inside, closing and shrinking the mouth, sealing it, pinching off the dough head, and rolling it into a round shape.

[0059] The sizes of the glutinous rice balls are required to be uniform, and the sealing parts of the glutinous rice balls are required to be seamless.

[0060] The printing step includes: using an inkjet printing device to print a customized pattern on the glutinous rice balls.

[0061] The printing height of the inkjet printing device is 8 mm, and the printing speed is 20 m / min.

[0062] The inkjet printing device adopts the 511-B printing machine of Wuhan Shanyin Technology Co., Ltd.

[0063] The inkjet printing device uses edible printing ink to print patterns; the edible natural ink is the Shanyin EP3812M produced by Wuhan Shanyin Technology Co., Ltd.

[0064] The quick freezing step comprises: putting the printed glutinous rice balls into a freezing plate and sending them into a tunnel quick freezing machine for quick freezing, and the temperature is controlled at -38°C.

[0065] The freezing time in the quick freezing step is controlled at 20 minutes.

[0066] The printed glutinous rice balls should be quickly frozen within 10 seconds.

[0067] The refrigeration temperature in the packaging and refrigeration step is controlled at -18°C.

[0068] Figure 3 This is a real shot of the surface printing of the quick-frozen glutinous rice balls prepared in comparative example 2.

[0069] Comparative Example 3

[0070] The present embodiment provides a process for printing the surface of quick-frozen glutinous rice balls, including the steps of making glutinous rice balls, inspecting, printing, quick freezing, packaging and refrigeration; the quick freezing step is carried out using a tunnel quick freezer, and the temperature is controlled at -30°C.

[0071] The steps of making the glutinous rice balls include: putting dough into the rice flour dough, rolling it into a round shape, kneading it into a hollow semi-spherical shape with a thick middle and thin edges, wrapping the stuffing inside, closing and shrinking the mouth, sealing it, pinching off the dough head, and rolling it into a round shape.

[0072] The sizes of the glutinous rice balls are required to be uniform, and the sealing parts of the glutinous rice balls are required to be seamless.

[0073] The printing step includes: using an inkjet printing device to print a customized pattern on the glutinous rice balls.

[0074] The printing height of the inkjet printing device is 8 mm, and the printing speed is 20 m / min.

[0075] The inkjet printing device adopts the 511-B printing machine of Wuhan Shanyin Technology Co., Ltd.

[0076] The inkjet printing device uses edible printing ink to print patterns; the edible natural ink is the Shanyin EP3812M produced by Wuhan Shanyin Technology Co., Ltd.

[0077] The quick freezing step comprises: putting the printed glutinous rice balls into a freezing plate and sending them into a tunnel quick freezing machine for quick freezing, and the temperature is controlled at -30°C.

[0078] The freezing time in the quick freezing step is controlled at 20 minutes.

[0079] The printed glutinous rice balls should be quickly frozen within 10 seconds.

[0080] The refrigeration temperature in the packaging and refrigeration step is controlled at -18°C.

[0081] Figure 4 This is a real shot of the surface printing of the quick-frozen glutinous rice balls prepared in comparative example 3.

[0082] Performance Testing

[0083] Printing pattern clarity test:

[0084] Samples: samples prepared in Example 1 and Comparative Examples 1-3.

[0085] Test method: Observe with naked eyes whether the surface of each sample has any diffusion or cracking of the printing. The test results are shown in Table 1.

[0086] Table 1

[0087] serial number Is there any spreading or cracking of the print? Example 1 no Comparative Example 1 yes Comparative Example 2 yes Comparative Example 3 yes

[0088] Combining Table 1 and Figure 1-4 It can be seen that the glutinous rice balls prepared by the quick-frozen glutinous rice ball surface printing process provided by the present invention have good printing effect and clear and complete patterns.

[0089] Compared with Example 1, Comparative Example 1 does not undergo quick freezing treatment after printing. Because the ink is water-based, the ink is easily diffused on the surface of the glutinous rice balls if it is not subjected to quick freezing treatment after printing, causing the pattern on the surface of the glutinous rice balls to be deformed and blurred.

[0090] Compared with Example 1, Comparative Example 2 changed the temperature of the quick freezing treatment to -38°C, which would cause the glutinous rice balls to crack.

[0091] Compared with Example 1, in Comparative Example 3, the temperature of the quick freezing treatment was changed to -30°C, and the printing appeared to diffuse, resulting in blurred patterns.

Claims

1. A surface printing process for quick-frozen glutinous rice balls, characterized in that: The method at least comprises the steps of making glutinous rice balls, inspecting, printing, quick freezing, packaging and refrigerating; the quick freezing step is carried out by using a quick freezing machine, and the temperature is controlled at -32 to -35°C.

2. The surface printing process of quick-frozen glutinous rice balls according to claim 1, characterized in that: The steps of making the glutinous rice balls include: putting dough into the rice flour dough, rolling it into a round shape, kneading it into a hollow semi-spherical shape with a thick middle and thin edges, wrapping the stuffing inside the semi-spherical shape, then closing and shrinking the mouth, sealing the mouth, pinching off the dough head, and rolling it into a round shape.

3. The surface printing process of quick-frozen glutinous rice balls according to claim 2, characterized in that: The sizes of the glutinous rice balls are required to be uniform, and the sealing parts of the glutinous rice balls are required to be seamless.

4. The surface printing process of quick-frozen glutinous rice balls according to claim 1, characterized in that: The printing step includes: using an inkjet printing device to print a customized pattern on the glutinous rice balls.

5. The surface printing process of quick-frozen glutinous rice balls according to claim 4, characterized in that: The printing height of the inkjet printing device is 7-9 mm, and the printing speed is 15-25 m / min.

6. The surface printing process of quick-frozen glutinous rice balls according to claim 4, characterized in that: The inkjet printing device uses edible printing ink to print patterns.

7. The surface printing process of quick-frozen glutinous rice balls according to claim 1, characterized in that: The quick freezer in the quick freezing step includes any one of a tunnel quick freezer, a spiral quick freezer, a lifting quick freezer, and a push-type quick freezer.

8. The surface printing process of quick-frozen glutinous rice balls according to claim 7, characterized in that: The freezing time in the quick freezing step is controlled at 15-30 minutes.

9. The surface printing process of quick-frozen glutinous rice balls according to claim 7, characterized in that: The printed glutinous rice balls should be quickly frozen within 10 seconds.

10. The surface printing process of quick-frozen glutinous rice balls according to claim 1, characterized in that: In the packaging and refrigeration step, the refrigeration temperature is controlled at -17 to -19°C.

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