CN218366962U - Colored stamping device and face skin stamping equipment - Google Patents

Abstract

The application discloses a colored stamping device and a dough sheet stamping device, and relates to the technical field of food processing equipment, wherein the colored stamping device comprises a rack, a stamping mechanism, a pigment transfer mechanism, a pigment supply mechanism and an air drying mechanism; the imprinting mechanism is arranged on the rack and is provided with a rotatable first cylindrical surface with an imprinted pattern; the pigment transferring mechanism is arranged on the frame and is provided with a rotatable second cylindrical surface which is in rolling contact with the first cylindrical surface; the pigment supply mechanism is arranged on the frame and used for supplying pigment to the second cylindrical surface; the air drying mechanism is arranged on the frame and used for air drying the imprinted pattern. Can supply with the colouring material for second cylindrical surface through colouring material feed mechanism, recycle the rolling contact cooperation between second cylindrical surface and the first cylindrical surface, shift the colouring material on the second cylindrical surface to first cylindrical surface on for first cylindrical surface can realize the coloured impression to the face skin, thereby can make the steamed stuffed bun of follow-up preparation realize richening pleasing to the eye molding more.

Description

Colored stamping device and face skin stamping equipment

Technical Field

The application relates to the technical field of food processing equipment, in particular to a colored stamping device and a wrapper stamping device.

Background

The steamed stuffed bun is one of the traditional Chinese gourmets and consists of a wrapper and stuffing. With the continuous development of the market, consumers do not have high requirements on the wrapper taste and the stuffing diversification of the steamed stuffed bun, and gradually have corresponding high requirements on the wrapper shape of the steamed stuffed bun; therefore, steamed stuffed buns with different shapes, such as steamed stuffed buns with pineapple shapes and steamed stuffed buns with walnut shapes, are also available in the market, and during the forming process of the steamed stuffed buns, corresponding embossing operation needs to be carried out on the wrapper so that the subsequently prepared steamed stuffed buns can have corresponding shapes.

At present, the embossing device for embossing the dough cover only has a single embossing function, cannot realize colored embossing, and still has certain limitation in use.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present application provides a color printing apparatus and a wrapper printing device to solve the technical problems of the background art.

In order to achieve the technical purpose, the application provides a colored imprinting device, which comprises a frame, an imprinting mechanism, a pigment transferring mechanism and a pigment supplying mechanism;

the stamping mechanism is arranged on the rack and is provided with a rotatable first cylindrical surface with a stamped pattern;

the pigment transferring mechanism is arranged on the rack and is provided with a rotatable second cylindrical surface which is in rolling contact with the first cylindrical surface;

the pigment feeding mechanism is arranged on the frame and used for feeding pigment to the second cylindrical surface;

the air drying mechanism is arranged on the rack and used for air drying the patterns stamped by the stamping mechanism.

Further, the stamping mechanism comprises a first shaft rod, at least one stamping roller and a first limiting assembly;

the first shaft lever is arranged on the rack;

the impression cylinder is movably sleeved on the first shaft lever and is arranged in a rotating way relative to the first shaft lever or is synchronously matched with the first shaft lever in a rotating way;

the outer circumferential surface of the impression cylinder forms the first cylindrical surface;

the first limiting assembly is detachably mounted on the first shaft rod and used for limiting the movement of the impression cylinder in the axial direction of the first shaft rod.

Furthermore, the first shaft rod is pivoted on the rack, and a first clamping groove is formed in the peripheral surface of the first shaft rod along the axial direction of the first shaft rod;

the inner circumferential surface of the impression cylinder is provided with a first protruding strip which is movably inserted into the first clamping groove;

the impression cylinder rotates synchronously with the first shaft rod through the matching of the first protruding strips and the first clamping grooves.

Further, the first shaft rod is a threaded rod;

the first limiting assembly comprises two first limiting sleeves;

the first limiting sleeve is sleeved on the first shaft rod and is in threaded connection with the first shaft rod.

Further, the pigment transferring mechanism comprises a second shaft rod, at least one transferring roller and a second limiting component;

the second shaft rod is arranged on the rack and is parallel to the first shaft rod;

the transfer roller is movably sleeved on the second shaft lever and can be arranged in a rotating way relative to the second shaft lever or synchronously and rotatably matched with the second shaft lever;

the transfer rollers correspond to the impression rollers one by one, and the outer peripheral surfaces of the transfer rollers and the impression rollers are coated with water absorbing layers;

the outer peripheral surface of the water absorption layer forms the second cylindrical surface;

the second limiting assembly is detachably mounted on the second shaft rod and used for limiting the movement of the transfer roller in the axial direction of the second shaft rod.

Further, the water absorption layer is a sponge layer.

Further, the toner supply mechanism includes a transfer pump and a toner transfer tube;

the conveying pipe is arranged on the rack, and a plurality of openable first nozzles are arrayed on the outer peripheral surface along the axial direction of the conveying pipe;

the first nozzle is disposed toward the second cylindrical surface;

the input end of the conveying pump is communicated with the pigment supply source, and the output end of the conveying pump is communicated with the conveying pipe.

Further, the air drying device also comprises an air drying mechanism;

the air drying mechanism comprises a fan and an air supply pipe;

the air supply pipe is arranged on the rack, and a plurality of second nozzles which can be opened and closed are arrayed on the peripheral surface along the axial direction of the air supply pipe;

the second nozzle is arranged downwards;

and the air supply end of the fan is communicated with the air supply pipe.

Further, the frame comprises two brackets;

the two brackets are arranged at intervals and symmetrically and respectively comprise a lifting adjusting mechanism and a fixing plate;

the lifting adjusting mechanism is connected with the fixed plate and is used for driving the fixed plate to move up and down;

the pressing mechanism, the toner transfer mechanism, and the toner supply mechanism are mounted between the two fixing plates.

The application also discloses a dough cover stamping device, which comprises a conveying belt device and the colored stamping device;

the colored imprinting device is arranged on the conveying belt;

and a gap for flour wrappers to pass through is formed between a first cylindrical surface on the stamping mechanism of the colored stamping device and the conveying belt on the conveying belt device.

According to the technical scheme, the colored imprinting device can supply the pigment to the second cylindrical surface through the pigment supply mechanism, and then transfer the pigment on the second cylindrical surface to the first cylindrical surface by utilizing the rolling contact fit between the second cylindrical surface and the first cylindrical surface, so that the colored imprinting of the surface skin of the first cylindrical surface can be realized, and the subsequently prepared steamed stuffed bun can be more colorful and beautiful in shape; and the design of the air drying mechanism can dry the impressed figure of the impressing mechanism, so that the phenomenon that the impressed figure is damaged due to the diffusion of the impressed pigment is avoided.

The utility model provides a face skin impression equipment, owing to take the look impression device including above-mentioned design, consequently it has the same beneficial effect with taking the look impression device, can realize taking the look impression to the face skin to can make the steamed stuffed bun of follow-up preparation realize abundanter pleasing to the eye molding.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor.

FIG. 1 is a front view of a color printing apparatus provided herein;

FIG. 2 is a side view of a color printing apparatus provided herein;

FIG. 3 is a partial cross-sectional view of a dough skin embossing apparatus provided herein;

in the figure: 1. a support; 11. a fixing plate; 12. a lifting adjusting mechanism; 121. a support bar; 122. an internally threaded sleeve; 123. a screw rod; 1231. rotating the handle; 2. a stamping mechanism; 21. a first shaft lever; 211. a first card slot; 22. an impression cylinder; 221. a first raised strip; 23. a first stop collar; 3. a colorant transfer mechanism; 31. a second shaft lever; 311. a second card slot; 32. a transfer drum; 321. a water-absorbing layer; 322. a second raised strip; 33. a second stop collar; 4. a toner supply mechanism; 41. a delivery pipe; 42. a first nozzle; 5. an air drying mechanism; 51. an air duct; 52. a second nozzle; 61. a bearing seat; 71. a third shaft lever; 72. a distance detector; 8. a conveyor belt device.

Detailed Description

The technical solutions of the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the embodiments in the present application.

In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are used broadly and are defined as, for example, a fixed connection, an exchangeable connection, an integrated connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, and a communication between two elements, unless otherwise explicitly stated or limited. Specific meanings of the above terms in the embodiments of the present application can be understood in specific cases by those of ordinary skill in the art.

The embodiment of the application discloses a colored stamping device.

Referring to fig. 1, an embodiment of a color printing apparatus provided in an embodiment of the present application includes:

a frame, a marking press mechanism 2, a coloring material transfer mechanism 3, a coloring material supply mechanism 4, and an air drying mechanism 5.

The imprinting mechanism 2 is mounted on the frame, and has a rotatable first cylindrical surface with an imprinting pattern, where the imprinting pattern may be a pattern structure constructed after designing grooves, stripes, and the like on the first cylindrical surface according to actual modeling requirements, and is not particularly limited.

The pigment transferring mechanism 3 is arranged on the rack and is provided with a rotatable second cylindrical surface which is in rolling contact with the first cylindrical surface, the pigment supplying mechanism 4 is arranged on the rack and is used for supplying pigment to the second cylindrical surface, and the pigment is edible color paste and can be specifically blended or selected according to actual needs.

The air drying mechanism 5 is arranged on the frame and is used for drying the patterns stamped by the stamping mechanism 2, so that the phenomenon that the integrity of the stamped patterns is damaged due to the diffusion of the coloring materials stamped on the stamping mechanism can be avoided.

According to the technical scheme, the colored imprinting device designed by the application can supply pigment to the second cylindrical surface through the pigment supply mechanism 4, the rolling contact cooperation between the second cylindrical surface and the first cylindrical surface is recycled, the pigment on the second cylindrical surface is transferred to the first cylindrical surface, colored imprinting can be realized on the surface skin of the first cylindrical surface, more rich and attractive modeling can be realized on subsequently prepared steamed stuffed buns, for example, a plurality of black stripes are imprinted on the surface skin of cyan, and the steamed stuffed buns formed by subsequently rolling up can present watermelon modeling.

The above is a first embodiment of a color printing apparatus provided in the embodiments of the present application, and the following is a second embodiment of the color printing apparatus provided in the embodiments of the present application, specifically please refer to fig. 1 to 3.

The scheme based on the first embodiment is as follows:

further, with regard to the design of the embossing mechanism 2, it comprises a first shaft 21, at least one embossing cylinder 22 and a first stop assembly.

The first shaft 21 is mounted on the frame.

The platen 22 is movably sleeved on the first shaft 21 and is rotatably disposed relative to the first shaft 21 or rotatably disposed synchronously with the first shaft 21. The platen 22 is rotatably disposed relative to the first shaft 21, that is, the first shaft 21 is fixed, and the platen 22 is rotatably sleeved on the first shaft 21; the impression cylinder 22 is synchronously rotationally engaged with the first shaft 21, i.e. the first shaft 21 is rotatably disposed, and the impression cylinder 22 is relatively statically engaged with the first shaft 21 in the rotational direction of the first shaft 21, so as to realize synchronous rotation. The person skilled in the art can select the corresponding matching mode according to the actual needs without limitation.

The outer circumferential surface of each of the impression cylinders 22 also forms a first cylindrical surface, i.e., the impression pattern is provided on the outer circumferential surface of the impression cylinder 22.

The first stopper member is detachably mounted on the first shaft 21 for restricting the movement of the platen roller 22 in the axial direction of the first shaft 21. The first limiting component is used for limiting and fixing the impression cylinder 22 in the axial direction of the first shaft rod 21, and the impression accuracy is prevented from being influenced by displacement when the impression cylinder 22 rotates.

In the embossing mechanism 2 with the above design, the embossing roller 22 is movably sleeved on the first shaft rod 21 and is limited and fixed by the first limiting component detachably mounted on the first shaft rod 21; can swiftly realize that the spelling of impression cylinder 22 of different quantity on first axostylus axostyle 21 is used, and then can satisfy different impression broad width demands and different impression figure combination demands, can carry out nimble adjustment to the position of impression cylinder 22 on first axostylus axostyle 21 simultaneously to satisfy the impression demand to different positions on the face skin, the suitability is better.

In the embossing mechanism 2 with the above design, for example, the embossing roller 22 and the first shaft rod 21 are synchronously rotated and matched, then the first shaft rod 21 can be designed to be pivoted on the rack, specifically, two bearing seats 61 can be configured on the rack, and the bearing seats 61 are respectively provided with a bearing piece therein, and are respectively matched with two ends of the first shaft rod 21, so as to realize the pivoting of the first shaft rod 21. A first locking groove 211 is formed on the outer peripheral surface of the first shaft rod 21 along the axial direction thereof, and the first locking groove 211 is designed such that two ends thereof respectively penetrate through the end surface of the first shaft rod 21.

The inner circumferential surface of the impression cylinder 22 is provided with a first protruding strip 221 which is movably inserted into the first slot 211, and when the impression cylinder 22 is installed, the first protruding strip 221 and the first slot 211 are aligned, so that the impression cylinder 22 can be sleeved on the first shaft rod 21. Based on the above design, the synchronous rotation of the impression cylinder 22 and the first shaft 21 can be realized by the cooperation of the first protruding strip 221 and the first slot 211.

Further, the first shaft 21 can be designed as a threaded rod, and the first position-limiting assembly is designed to include two first position-limiting sleeves 23 with internal threads, and the first position-limiting sleeves 23 are sleeved on the first shaft 21 and are in threaded connection with the first shaft 21. Through this design, can realize the spacing function of first spacing subassembly, first spacing subassembly also can realize dismantling the cooperation with first axostylus axostyle 21 simultaneously. Those skilled in the art can make appropriate design changes based on the above without limitation.

Further, the toner transferring mechanism 3 includes a second shaft 31, at least one transferring roller 32, and a second limiting component.

The second shaft 31 is mounted on the frame, is parallel to the first shaft 21, and may be disposed directly above the first shaft 21.

The transfer roller 32 is movably sleeved on the second shaft lever 31 and can be rotatably arranged relative to the second shaft lever 31 or synchronously and rotatably matched with the second shaft lever 31; the impression cylinder 22 can be referred to in the above-mentioned rotation matching setting, and details thereof are not described.

The transfer cylinders 32 correspond to the impression cylinders 22 one by one, and the outer peripheral surfaces thereof are coated with water absorbing layers 321, and the outer peripheral surfaces of the water absorbing layers 321 form second cylindrical surfaces. The water absorbing layer 321 can provide the transfer roller 32 with a certain storage capacity for the colorant, so as to achieve a better colorant transfer effect.

The second limiting assembly is detachably mounted on the second shaft 31 for limiting the movement of the transfer roller 32 in the axial direction of the second shaft 31. Similarly, taking the example that the transferring roller 32 and the second shaft rod 31 are synchronously rotated and matched, the second shaft rod 31 may be designed to be pivoted to the rack, specifically, two bearing seats 61 are also configured on the rack, and the bearing seats 61 are respectively provided with bearing members therein and respectively matched with two ends of the second shaft rod 31, so as to implement the pivoting of the second shaft rod 31. A second locking slot 311 is formed on the outer peripheral surface of the second shaft rod 31 along the axial direction thereof, and the second locking slot 311 is designed such that two ends thereof respectively penetrate through the end surface of the second shaft rod 31.

The inner circumferential surface of the transfer roller 32 is provided with a second protruding strip 322 movably inserted into the second slot 311, and when the transfer roller 32 is installed, the second protruding strip 322 and the second slot 311 are aligned, so that the transfer roller 32 can be sleeved on the second shaft rod 31. Based on the above design, the transfer roller 32 and the second shaft 31 can rotate synchronously by the cooperation of the second protruding strip 322 and the second slot 311.

The overall structure design of the colorant transfer mechanism 3 is the same as that of the impression mechanism 2, and the combination of the transfer rollers 32 can be correspondingly adjusted according to different combinations of the impression rollers 22, so that accurate colorant transfer is ensured. Similarly, the second shaft 31 can also be designed as a threaded rod, and the second limiting component is designed to include two second limiting sleeves 33 with internal threads, and the second limiting sleeves 33 are sleeved on the second shaft 31 and are in threaded connection with the second shaft 31. Through this design, can realize the limit function of second spacing subassembly, the cooperation can be dismantled with second axostylus axostyle 31 to the second spacing subassembly of realization simultaneously.

In addition, in the present application, the stamping mechanism 2 and the colorant transferring mechanism 3 may further include a spacer sleeve (not shown), and the spacer sleeve may be movably sleeved on the first shaft rod 21 or the second shaft rod 31 for limiting the distance between the adjacent stamping rollers 22 or limiting the distance between the adjacent transferring rollers 32, so that the stamping rollers 22 may be assembled in a more diversified manner.

Further, the water-absorbent layer 321 may be, without limitation, a sponge layer, a water-absorbent resin layer, or the like.

Further, the toner supply mechanism 4 is configured to include a feed pump (not shown) and a toner feed tube 41;

the duct 41 is mounted on the frame, and a plurality of openable and closable first nozzles 42 are arrayed on the outer peripheral surface in the axial direction thereof, and the first nozzles 42 are disposed toward the second cylindrical surface, taking the case where the duct 41 is disposed above one side of the transfer drum 32 as an example, then the first nozzles 42 may be designed to be inclined toward the transfer drum 32. The openable and closable first nozzle 42 may be a commercially available nozzle with an opening and closing structure, and is not limited in particular.

The input end of the conveying pump is communicated with a pigment supply source (such as a pigment storage tank), the output end of the conveying pump is communicated with the conveying pipe 41, and the first nozzle 42 of the corresponding area section is opened, so that the pigment can be correspondingly supplied to the water absorption layer 321 on the corresponding transfer roller 32, and the use is more flexible.

Further, the air drying mechanism 5 of the present application includes a blower and a blower pipe 51.

The blower duct 51 is mounted on the frame, and a plurality of openable second nozzles 52 are arrayed on the outer peripheral surface in the axial direction thereof, and the second nozzles 52 are disposed vertically downward. The second openable nozzle 52 can also be a nozzle with an opening and closing structure commonly used in the market, and is not limited specifically.

The air supply end of the fan is communicated with the air supply pipe 51, and the air-drying of the area which is stamped on the dough cover can be correspondingly carried out by opening the second nozzle 52 of the corresponding area section, so that the phenomenon that the stamped pigment is diffused to damage the integrity of the stamped graph is avoided.

Further, in the case of a rack design, two racks 1 are included.

Two supports 1 interval and symmetry set up, and all include lift adjustment mechanism 12 and fixed plate 11, and lift adjustment mechanism 12 is connected with fixed plate 11 for drive 11 elevating movement of fixed plate. The stamping mechanism 2, the toner transfer mechanism 3 and the toner supply mechanism 4 are installed between two fixing plates 11.

The adjustable design of frame can realize adjusting 2 height of coining mechanism, and then can adjust coining mechanism 2 according to the face skin thickness of difference to guarantee that coining mechanism 2 can be enough with the face skin contact and accomplish the impression.

Further, in order to make the lifting adjustment of the rack more accurate, the present application may further be designed with a distance detector 72, the distance detector 72 is installed between the two fixing plates 11 for detecting the vertical distance between itself and the surface of the dough cover, since the diameter of the impression cylinder 22 and the relative height relationship between the impression cylinder and the distance detector 72 are known, when the vertical distance between the distance detector 72 and the surface of the dough cover is known, the distance between the outer circumferential surface of the impression cylinder 22 and the surface of the dough cover can also be known, thereby providing a basis for the lifting adjustment, ensuring the accuracy of the lifting adjustment of the rack, and the distance detector 72 may be a laser ranging probe. In order to realize adaptive lifting adjustment, the lifting adjustment mechanism 12 may be a telescopic cylinder, an electric telescopic rod, or the like controlled by a control module such as a PLC controller, the distance detector 72 is connected to the control module, and feeds back detection data to the control module, and the control module controls the lifting adjustment mechanism 12 based on the feedback data.

Further, in order to facilitate the installation of the distance detector 72, a third shaft 71 may be fixed between the two fixing plates 11, and the distance detector 72 may be installed on the third shaft 71. The third shaft rod 71 is parallel to the first shaft rod 21 and the second shaft rod 31, and is disposed on the other side of the imprinting mechanism 2 away from the air duct 51, so as to satisfy the distance detection on the front side of imprinting, and the air drying operation sequence on the rear side of imprinting.

Further, the lifting adjusting mechanism 12 may also be a manual adjusting mechanism, which includes a supporting rod 121, a screw rod 123, and an internal threaded sleeve 122; the bottom end of the screw rod 123 is rotatably connected with the top end of the support rod 121 and is coaxially arranged with the support rod 121; the internal thread sleeve 122 is sleeved on the screw rod 123 and is in threaded fit with the screw rod 123; the fixing plate 11 is fixedly connected to the internally threaded sleeve 122. Because the stamping mechanism 2 and the like are installed between the fixing plates 11, the fixing plates 11 can play a role in limiting the rotation of the internal thread sleeve 122, so that the internal thread sleeve 122 does not rotate relative to the screw rod 123, and therefore when the screw rod 123 is rotated, the screw thread matching between the screw rod 123 and the internal thread sleeve 122 can be utilized to drive the internal thread sleeve 122 to move up and down, and further the fixing plates 11 are driven to move up and down, so that the lifting adjustment of the stamping mechanism 2 is realized.

Further, in order to facilitate the rotation of the screw rod 123, the top height of the fixing plate 11 mounted on the internally threaded sleeve 122 is lower than the top height of the internally threaded sleeve 122, and a rotation handle 1231 is fixed to the top end of the screw rod 123 to facilitate the rotation of the screw rod 123.

As shown in fig. 3, the present application further discloses a dough cover stamping device, which comprises a conveying belt device 8 and the colored stamping device of the first embodiment or the second embodiment.

The color imprinting device is arranged on a conveying belt, and a gap for flour wrappers to pass through is formed between a first cylindrical surface on an imprinting mechanism 2 of the color imprinting device and the conveying belt on a conveying belt device 8. The dough cover passes through a gap between the first cylindrical surface and the conveying belt under the driving of the conveying belt device 8 and is in contact with the first cylindrical surface to drive the first cylindrical surface to rotate, so that the impression graph on the first cylindrical surface can be roll-printed on the dough cover.

While the present invention has been described with reference to the drawings, it is to be understood that the same is by way of illustration and example only and is not to be taken by way of limitation, and that the scope of the invention is not limited to the details of the illustrated embodiments.

Claims (10)

1. A color printing device is characterized by comprising a frame, a printing mechanism (2), a color material transfer mechanism (3), a color material supply mechanism (4) and an air drying mechanism (5);

the imprinting mechanism (2) is arranged on the rack and is provided with a rotatable first cylindrical surface with an imprinting pattern;

the pigment transfer mechanism (3) is arranged on the stand and is provided with a rotatable second cylindrical surface which is in rolling contact with the first cylindrical surface;

the pigment feeding mechanism (4) is arranged on the frame and is used for feeding pigment to the second cylindrical surface;

and the air drying mechanism (5) is arranged on the rack and is used for air drying the patterns stamped by the stamping mechanism (2).

2. The chromatic imprinting apparatus of claim 1, characterized in that the imprinting mechanism (2) comprises a first shaft (21), at least one imprinting cylinder (22) and a first stop assembly;

the first shaft lever (21) is arranged on the frame;

the impression cylinder (22) is movably sleeved on the first shaft lever (21) and is rotatably arranged relative to the first shaft lever (21) or is synchronously and rotatably matched with the first shaft lever (21);

the outer peripheral surface of the impression cylinder (22) forms the first cylindrical surface;

the first limiting assembly is detachably mounted on the first shaft rod (21) and used for limiting the movement of the impression cylinder (22) in the axial direction of the first shaft rod (21).

3. The color printing device according to claim 2, wherein the first shaft (21) is pivotally connected to the frame, and a first locking groove (211) is formed in an outer circumferential surface of the first shaft (21) along an axial direction thereof;

a first protruding strip (221) which is movably inserted into the first clamping groove (211) is arranged on the inner circumferential surface of the impression cylinder (22);

the impression cylinder (22) is matched with the first clamping groove (211) through the first protruding strip (221) to synchronously rotate with the first shaft rod (21).

4. A chromatic printing device according to claim 2, characterized in that the first shaft (21) is a threaded rod;

the first limiting assembly comprises two first limiting sleeves (23);

the first limiting sleeve (23) is sleeved on the first shaft lever (21) and is in threaded connection with the first shaft lever (21).

5. A chromatic printing device according to claim 2, characterized in that the colorant transfer mechanism (3) comprises a second shaft (31), at least one transfer roller (32) and a second stop assembly;

the second shaft (31) is mounted on the frame and is parallel to the first shaft (21);

the transfer roller (32) is movably sleeved on the second shaft lever (31) and can be rotatably arranged relative to the second shaft lever (31) or synchronously and rotatably matched with the second shaft lever (31);

the transfer rollers (32) correspond to the impression rollers (22) one by one, and the outer peripheral surfaces of the transfer rollers are coated with water absorbing layers (321);

the outer peripheral surface of the water absorption layer (321) forms the second cylindrical surface;

the second limiting assembly is detachably mounted on the second shaft (31) and used for limiting the movement of the transfer roller (32) in the axial direction of the second shaft (31).

6. The chromatic imprinting apparatus of claim 5, wherein the water-absorbing layer (321) is a sponge layer.

7. A chromatic imprinting apparatus according to claim 1, characterized in that said colorant supply mechanism (4) comprises a delivery pump and a colorant delivery tube (41);

the conveying pipe (41) is arranged on the rack, and a plurality of openable first nozzles (42) are arranged on the outer peripheral surface of the conveying pipe in an array manner along the axial direction of the conveying pipe;

the first nozzle (42) is disposed toward the second cylindrical surface;

the input end of the conveying pump is communicated with a pigment supply source, and the output end of the conveying pump is communicated with the conveying pipe (41).

8. The color printing apparatus according to claim 1, wherein said air drying means (5) comprises a fan and a blower tube (51);

the air supply pipe (51) is arranged on the frame, and a plurality of second nozzles (52) which can be opened and closed are arranged on the outer peripheral surface of the air supply pipe in an array along the axial direction of the air supply pipe;

the second nozzle (52) is arranged downwards;

the air supply end of the fan is communicated with the air supply pipe (51).

9. A chromatic imprinting device according to claim 1, characterized in that said frame comprises two supports (1);

the two brackets (1) are arranged at intervals and symmetrically and respectively comprise a lifting adjusting mechanism (12) and a fixing plate (11);

the lifting adjusting mechanism (12) is connected with the fixed plate (11) and is used for driving the fixed plate (11) to move up and down;

the stamping mechanism (2), the toner transfer mechanism (3) and the toner supply mechanism (4) are installed between the two fixing plates (11).

10. A dough cover embossing apparatus, comprising a conveyor means (8) and a color embossing means according to any one of claims 1 to 9;

the colored imprinting device is arranged on the conveying belt;

and a gap for flour wrappers to pass through is formed between a first cylindrical surface on the stamping mechanism (2) of the color stamping device and a conveying belt on the conveying belt device (8).

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