Powder-saving hopper arranged inside powder shaking box

Abstract

The invention relates to a powder saving hopper arranged in a powder shaking box. The powder-saving hopper comprises a spoon-shaped main body and a photoelectric sensor, the spoon-shaped main body comprises a spoon head, a spoon handle and a spoon tail which are connected in sequence; edge clamping pipes matched with the edges of the PET film are arranged on the two sides of the bottom of the spoon head; the spoon handle is hinged with the powder shaking box; the spoon tail is provided with a certain load; a photosensitive sheet is arranged outside the bottom of the spoon head; the photoelectric sensor is mounted outside one side of the powder shaking box; a light hole is formed in the side wall of the powder shaking box; the sensing light of the photoelectric sensor is matched with the sensing sheet after penetrating through the light hole; an electric signal of the photoelectric sensor is associated with powder distribution of the powder distribution box. Most printing powder is concentrated in the inner cavity of the spoon head and is effectively combined with the PET film; when the spoon head is too heavy, the induction piece is matched with the photoelectric sensor, and powder distribution of the powder distribution chamber is stopped; in this way, the powder distribution speed of the powder distribution box can be matched with the flowing speed of the PET film, and printing powder is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of accessories for powder shaking machines, and particularly to a powder-saving hopper disposed inside a powder shaking box. Background Art

[0002] A powder shaking machine, also known as a color fixing machine, is a device for laminating a PET film printed with text or patterns. The principle of the powder shaking machine for laminating the PET film is to ensure that the printed powder on the PET film is evenly arranged in front of the drying chamber, and then the drying chamber heats the PET film with evenly arranged printed powder. On the one hand, it accelerates the volatilization of water in the ink forming the text or pattern, and on the other hand, it melts the printed powder, so that the melted printing material is evenly arranged on the PET film to form a uniformly thick covering layer. However, the powder distribution speed of the powder distribution box for the PET film and the transfer speed of the PET film do not match; the powder distribution of the powder distribution box and the transfer of the PET film are carried out simultaneously, and the amount of powder distributed by the powder distribution box within a certain period of time is much larger than the amount of powder required by the transferred PET film during this period. Therefore, a cloth beating roller is usually provided in the latter half of the conventional powder shaking box; the cloth beating roller beats the back of the PET film to knock off the excess printed powder into the powder shaking box. This will undoubtedly cause waste of printed powder. In order to save printed powder, the prior art has proposed a powder circulation system that can re-transport the printed powder in the powder shaking box back into the powder shaking box. The essence of this powder circulation system is to obtain the saving of printed powder at the cost of energy loss, and it cannot solve the problem of "the powder distribution speed of the powder distribution box for the PET film and the transfer speed of the PET film do not match". Summary of the Invention

[0003] The purpose of the present invention is to solve the above problems and provide a powder-saving hopper disposed inside a powder shaking box.

[0004] The technical solution of the present invention is as follows: A powder-saving hopper provided inside the powder shaking box includes a spoon-shaped main body and a photoelectric sensor; the spoon-shaped main body includes a spoon head, a spoon handle, and a spoon tail that are connected in sequence; on both sides of the bottom of the spoon head, there are card edge tubes that cooperate with the edges of the PET film; the card edge tubes limit the edges of the PET film to prevent the edges of the PET film from folding inward, which affects the combination of the PET film and the printed powder; the PET film obtains the printed powder in the powder distribution box; the printed powder carried on the PET film is conveyed downward into the inner cavity of the spoon head as the PET film flows; after passing through the inner cavity of the spoon head, the PET film flows upward and turns to the drying chamber; the excess printed powder on the PET film will remain in the inner cavity of the spoon head; the spoon handle is hinged to the powder shaking box; a certain load is provided at the spoon tail; a photosensitive sheet is provided on the outer side of the bottom of the spoon head; the photoelectric sensor is installed outside one side of the powder shaking box; a light-transmitting hole is provided on the side wall of the powder shaking box; the sensing light of the photoelectric sensor passes through the light-transmitting hole and cooperates with the sensing sheet; the electrical signal of the photoelectric sensor is associated with the powder distribution of the powder distribution box; the spoon handle is similar to a lever; the weight of the spoon head is a variable, which is positively correlated with the amount of printed powder in the inner cavity of the spoon head; the load at the spoon tail is a fixed quantity, and a suitable weight for the inner cavity of the spoon head is determined; when the weight at the spoon head is greater than this suitable weight, the spoon head drops, and the sensing sheet triggers the photoelectric sensor; when the weight at the spoon head is less than this suitable weight, the spoon head rises and does not trigger the photoelectric sensor; the powder distribution of the powder distribution box is intermittent; the flow of the PET film is determined by the drying speed of the drying chamber; when the spoon head drops, the photoelectric sensor sends a signal to prevent the powder distribution of the powder distribution box; when the upper head rises, the photoelectric sensor does not send a signal, and the powder distribution box continues to distribute powder intermittently.

[0005] Preferably, a horizontal powder leakage port is provided at the bottom of the spoon head to discharge the printed powder at the bottom of the spoon head; the printed powder that falls to the bottom of the spoon head cannot be combined with the surface of the PET film again. It remains in the inner cavity of the spoon head, which will only increase the weight of the spoon head additionally and interfere with the determination of the weight of the spoon head by the photoelectric sensor; there are several photosensitive sheets, which are evenly distributed along the length direction of the powder leakage port; the end of the photosensitive sheet is connected to the edge of the powder leakage port; the photosensitive sheet plays a role in strengthening the structural strength of the powder leakage port.

[0006] Preferably, the powder-saving hopper provided inside the powder shaking box further includes mounting screws, a left distance-adjusting baffle and a right distance-adjusting baffle that are symmetrically arranged left and right; the left distance-adjusting baffle includes a baffle and a surrounding plate; the outer wall of the surrounding plate is closely attached to the inner wall of the spoon head; the card edge tube is connected to the inner wall of the lower part of the baffle; the right side edge of the baffle is connected to the left side edge of the surrounding plate; a horizontal adjusting long hole is provided on the surrounding plate; a mounting screw hole corresponding to and matching the adjusting long hole is provided on the inner wall of the spoon head; the mounting screw passes through the adjusting long hole and is in threaded cooperation with the mounting screw hole; by changing the position of the mounting screw in the adjusting long hole, the distance between the left distance-adjusting baffle and the right distance-adjusting baffle can be changed to adapt to the flow of PET films of different widths in the inner cavity of the spoon head.

[0007] Further, there are several mounting screw holes; the several mounting screw holes are symmetrically arranged with respect to the left-right symmetry center plane of the spoon head, which can increase the width range of the PET film adaptable to the inner cavity of the spoon head.

[0008] Further, a longitudinal powder discharge port is provided at the bottom of the surrounding plate to discharge the printing powder that has fallen to the bottom of the surrounding plate, avoiding interference with the photoelectric sensor's judgment of the weight of the spoon head.

[0009] Further, the front edge of the spoon head extends forward to form a front extension plate A; the front edge of the surrounding plate extends forward to form a front extension plate B; there are two adjustment long holes on the surrounding plate; one adjustment long hole is provided on the front extension plate B; the front extension plate A is provided with a mounting screw hole corresponding to this adjustment long hole; the other adjustment long hole is provided on the inner wall of the rear side of the surrounding plate; the inner wall of the rear side of the spoon head is provided with a mounting screw hole corresponding to the other adjustment long hole; the two adjustment long holes can increase the connection stability between the left and right distance-adjusting baffles and the inner cavity of the spoon head; the mounting screw connected to the inner wall of the rear side of the surrounding plate can enable the printing powder to smoothly fall into the inner cavity of the spoon head.

[0010] Preferably, the spoon head is arranged inside the powder shaking box; the spoon tail is arranged outside the powder shaking box; the spoon handle penetrates through the rear side wall of the powder shaking box, which can prevent the printing powder from falling on the spoon tail and interfering with the judgment of the photoelectric sensor.

[0011] Further, the rear side wall of the powder shaking box is provided with a mounting hole matching the spoon head; the powder-saving hopper arranged inside the powder shaking box further includes a guiding hopper installed below the spoon handle; the guiding hopper includes a rear folding plate and side plates; the upper part of the rear folding plate is bent backward; the lower part of the rear folding plate is connected to the rear side wall of the powder shaking box; one end of the side plate is connected to the upper edge of the rear folding plate, and the other end abuts against the rear side wall of the powder shaking box; the guiding hopper is a hopper body with openings at the top and side, which can re-guide the printing powder discharged from the mounting hole to the outside of the powder shaking box back into the powder shaking box, avoiding waste of the printing powder.

[0012] Further, a plurality of vertical mounting long holes are arranged in an array on the lower edge of the rear folding plate; the lower part of the rear folding plate is connected to the powder shaking box through the mounting long holes and screws. By adjusting the matching position of the screws and the mounting long holes, the height of the guiding hopper can be adjusted to prevent the printing powder from leaking out of the powder shaking box as much as possible.

[0013] Further, the spoon handle is a U-shaped structure with the closed end facing upward to prevent the printing powder from being discharged from the spoon handle.

[0014] Preferably, the horizontal cross-section of the spoon head is equivalent to the horizontal cross-section of the bottom of the powder shaking box to receive the printing powder entering the inner cavity of the spoon head in the form of free fall as much as possible.

[0015] The beneficial effects of the present invention are: The powder-saving hopper arranged inside the powder shaking box of the present invention has the following advantages: (1) The powder-saving hopper of the present invention is arranged inside the powder-shaking box; the PET film is inside the powder-shaking box, first enters the inner cavity of the spoon head downward, and then leaves the inner cavity of the spoon head and the powder-shaking box upward; the powder-distributing box distributes the printing powder onto the PET film, and most of it remains inside the inner cavity of the spoon head when entering and leaving the inner cavity of the spoon head; the edge-clamping tube restricts the edge of the PET film to ensure that the printing powder is padded above the PET film, guaranteeing the effective combination of the printing powder and the PET film; in this way, most of the printing powder is concentrated in the inner cavity of the spoon head and effectively combined with the PET film; when the spoon head is too heavy, the induction sheet cooperates with the photoelectric sensor to stop the powder distribution in the powder distribution chamber; in this way, the powder distribution speed of the powder-distributing box can be coordinated with the flow speed of the PET film, saving printing powder. (2) By changing the position of the mounting screw in the adjustment long hole, the present invention can change the distance between the left distance-adjusting baffle and the right distance-adjusting baffle to adapt to the flow of PET films with different widths inside the inner cavity of the spoon head. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the installation perspective view of the powder-saving hopper of the present invention arranged inside the powder-shaking box; Figure 2 is the perspective Figure 1 ; Figure 3 is the perspective Figure 2 ; Figure 4 is Figure 2 the front view of; Figure 5 is Figure 4 the A-A cross-sectional view of; Figure 6 is Figure 5 the B-B cross-sectional view of; Figure 7 is the physical photo of the present invention; In the figure: 0. powder-shaking box, 01. light-transmitting hole, 02. mounting hole, 1. spoon-shaped main body, 11. spoon head, 111. edge-clamping tube, 112. photosensitive sheet, 113. powder leakage port, 114. mounting screw hole, 115. front extension plate A, 12. spoon handle, 121. reinforcing support plate, 131. clamping plate, 132. load block, 133. connecting plate, 1331. connecting nut, 2. photoelectric sensor, 3. mounting screw, 4. left distance-adjusting baffle, 41. baffle, 42. enclosing plate, 421. adjustment long hole, 422. powder discharge port, 423. front extension plate B, 5. right distance-adjusting baffle, 6. guiding hopper, 61. rear folding plate, 611. mounting long hole, 62. side plate. DETAILED DESCRIPTION OF THE INVENTION

[0017] Example 1: Refer to Figures 1-6, A powder-saving hopper installed inside the powder shaking box 0 includes a spoon-shaped main body 1 and a photoelectric sensor 2; the spoon-shaped main body 1 includes a spoon head 11, a spoon handle 12, and a spoon tail connected in sequence; on both sides of the bottom of the spoon head 11, there are card edge tubes 111 that cooperate with the edges of the PET film; the card edge tubes 111 limit the edges of the PET film to prevent the edges of the PET film from folding inward, which affects the combination of the PET film and the printing powder; the PET film obtains the printing powder in the powder distribution box; the printing powder carried on the PET film is transported downward into the inner cavity of the spoon head 11 as the PET film flows; after the PET film passes through the inner cavity of the spoon head 11, it flows upward and turns to the drying chamber; the excess printing powder on the PET film will remain in the inner cavity of the spoon head 11; the spoon handle 12 is hinged to the powder shaking box 0; a certain load is provided at the spoon tail; a photosensitive sheet 112 is provided on the outside of the bottom of the spoon head 11; the photoelectric sensor 2 is installed outside one side of the powder shaking box 0; a light-transmitting hole 01 is provided on the side wall of the powder shaking box 0; the sensing light of the photoelectric sensor 2 passes through the light-transmitting hole 01 and cooperates with the sensing sheet; the electrical signal of the photoelectric sensor 2 is related to the powder distribution of the powder distribution box; the spoon handle 12 is similar to a lever; the weight of the spoon head 11 is a variable, which is positively correlated with the amount of printing powder in the inner cavity of the spoon head 11; the load at the spoon tail is a fixed quantity, and a suitable weight in the inner cavity of the spoon head 11 is determined; when the weight at the spoon head 11 is greater than this suitable weight, the spoon head 11 drops, and the sensing sheet triggers the photoelectric sensor 2; when the weight at the spoon head 11 is less than this suitable weight, the spoon head 11 rises and does not trigger the photoelectric sensor 2; the powder distribution of the powder distribution box is intermittent; the flow of the PET film is determined by the drying speed of the drying chamber; when the spoon head 11 drops, the photoelectric sensor 2 sends a signal to stop the powder distribution of the powder distribution box; when the spoon head 11 rises, the photoelectric sensor 2 does not send a signal, and the powder distribution box continues intermittent powder distribution.

[0018] Compared with the prior art, the powder-saving hopper of the present invention is installed inside the powder shaking box 0; the PET film is inside the powder shaking box 0, first enters the inner cavity of the spoon head 11 downward, and then leaves the inner cavity of the spoon head 11 and the powder shaking box 0 upward; most of the printing powder that the powder distribution box distributes onto the PET film remains inside the inner cavity of the spoon head 11 when entering and leaving the inner cavity of the spoon head 11; the card edge tubes 111 limit the edges of the PET film to ensure that the printing powder is padded above the PET film, guaranteeing the effective combination of the printing powder and the PET film; in this way, most of the printing powder is concentrated in the inner cavity of the spoon head 11 and effectively combines with the PET film; when the spoon head 11 is too heavy, the sensing sheet cooperates with the photoelectric sensor 2 to stop the powder distribution of the powder distribution chamber; in this way, the powder distribution speed of the powder distribution box can be coordinated with the flow speed of the PET film, saving printing powder.

[0019] A powder leakage port 113 is provided at the bottom of the spoon head 11 horizontally to discharge the printing powder at the bottom of the spoon head 11. The printing powder that has fallen to the bottom of the spoon head 11 cannot bind to the surface of the PET film anymore. It remains in the inner cavity of the spoon head 11, which will only increase the weight of the spoon head 11 additionally and interfere with the determination of the weight of the spoon head 11 by the photoelectric sensor 2. There are several photosensitive films 112, which are evenly distributed along the length direction of the powder leakage port 113. The end of the photosensitive film 112 is connected to the edge of the powder leakage port 113. The photosensitive film 112 plays a role in strengthening the structural strength of the powder leakage port 113. There are 5 photosensitive films 112 in this embodiment.

[0020] The powder-saving hopper provided inside the powder shaking box 0 further includes mounting screws 3, a distance-adjusting left baffle 4 and a distance-adjusting right baffle 5 which are symmetrically arranged left and right. The distance-adjusting left baffle 4 includes a baffle 41 and a surrounding plate 42. The outer wall of the surrounding plate 42 is closely attached to the inner wall of the spoon head 11. The clamping edge tube 111 is connected to the inner wall of the lower part of the baffle 41. The right side edge of the baffle 41 is connected to the left side edge of the surrounding plate 42. The surrounding plate 42 is provided with a horizontal adjusting long hole 421. The inner wall of the spoon head 11 is provided with mounting screw holes 114 corresponding to and matching the adjusting long hole 421. The mounting screw 3 passes through the adjusting long hole 421 and is in threaded cooperation with the mounting screw hole 114. By changing the position of the mounting screw 3 in the adjusting long hole 421, the distance between the distance-adjusting left baffle 4 and the distance-adjusting right baffle 5 can be changed to adapt to the flow of PET films with different widths in the inner cavity of the spoon head 11.

[0021] There are several mounting screw holes 114. The several mounting screw holes 114 are symmetrically arranged with respect to the left-right symmetry center plane of the spoon head 11, which can increase the range of widths of PET films that the inner cavity of the spoon head 11 can adapt to. In this embodiment, there are 4 mounting screw holes 114 on both the front cavity wall and the rear cavity wall of the inner cavity of the spoon head 11.

[0022] A longitudinal powder discharge port 422 is provided at the bottom of the surrounding plate 42 to discharge the printing powder that has fallen to the bottom of the surrounding plate 42, so as to avoid interfering with the photoelectric sensor 2 to judge the weight of the spoon head 11.

[0023] The front edge of the spoon head 11 extends forward to form a front extension plate A 115. The front edge of the surrounding plate 42 extends forward to form a front extension plate B 423. There are two adjusting long holes 421 on the surrounding plate 42. One adjusting long hole 421 is arranged on the front extension plate B 423. The front extension plate A 115 is provided with a mounting screw hole 114 corresponding to this adjusting long hole 421. The other adjusting long hole 421 is arranged on the rear inner wall of the surrounding plate 42. The rear inner wall of the spoon head 11 is provided with a mounting screw hole 114 corresponding to the other adjusting long hole 421. The two adjusting long holes 421 can increase the connection stability between the distance-adjusting left baffle 4, the distance-adjusting right baffle 5 and the inner cavity of the spoon head 11. The mounting screw 3 connected to the rear inner wall of the surrounding plate 42 can make the printing powder fall smoothly into the inner cavity of the spoon head 11.

[0024] The spoon head 11 is arranged inside the powder shaking box 0; the spoon tail is arranged outside the powder shaking box 0; the spoon handle penetrates through the rear side wall of the powder shaking box 0, which can prevent the printing powder from falling onto the spoon tail and interfering with the judgment of the photoelectric sensor 2.

[0025] The rear side wall of the powder shaking box 0 is provided with a mounting hole 02 matching the spoon head 11; the powder saving hopper arranged inside the powder shaking box 0 further includes a guiding hopper 6 installed below the spoon handle; the guiding hopper 6 includes a rear folding plate 61 and side plates 62; the upper part of the rear folding plate 61 is bent backward; the lower part of the rear folding plate 61 is connected to the rear side wall of the powder shaking box 0; one end of the side plate 62 is connected to the upper edge of the rear folding plate 61, and the other end abuts against the rear side wall of the powder shaking box 0; the guiding hopper 6 is a hopper body with openings at the top and side, which can re-guide the printing powder discharged from the mounting hole 02 to the outside of the powder shaking box 0 back into the powder shaking box 0, avoiding the waste of printing powder.

[0026] A number of vertical mounting long holes 611 are arrayed along the lower edge of the rear folding plate 61; the lower part of the rear folding plate 61 is connected to the powder shaking box 0 through the mounting long holes 611 and screws. By adjusting the matching position of the screws and the mounting long holes 611, the height of the guiding hopper 6 can be adjusted to prevent the printing powder from leaking out of the powder shaking box 0 as much as possible; there are 5 mounting long holes 611 in this embodiment.

[0027] The horizontal cross-section of the spoon head 11 is equivalent to the horizontal cross-section of the bottom of the powder shaking box 0, so as to receive the printing powder entering the inner cavity of the spoon head 11 in the form of free fall as much as possible.

[0028] The working process of this embodiment: The PET film intermittently circulates inside the powder shaking box 0; the powder distributing box intermittently distributes powder onto the PET film; the PET film obliquely enters the inner cavity of the spoon head 11, bypasses the lower side of the clamping edge tube 111, and then obliquely exits the inner cavity of the spoon head 11; most of the printing powder on the PET film is concentrated into the inner cavity of the spoon head 11; when the weight of the spoon head 11 is too heavy, the spoon head 11 will drop; the photosensitive piece 112 triggers the photoelectric sensor 2; the photoelectric sensor 2 emits an electrical signal to pause the powder distribution of the powder distributing box; the PET film continues to circulate; later, the PET film entering the inner cavity of the spoon head 11 is fully combined with the printing powder in the inner cavity of the spoon head 11; when a certain amount of the printing powder in the inner cavity of the spoon head 11 is taken away by the circulating PET film, the weight of the spoon head 11 decreases; the load presses up the spoon head 11, and the sensing piece no longer blocks the sensing light emitted by the photoelectric sensor 2; the powder distributing box continues to distribute powder intermittently.

[0029] Embodiment Two: Embodiment Two is basically the same as Embodiment One, and the same parts will not be described again. The differences are: the spoon handle 12 is a U-shaped structure with the closed end facing upward to prevent the printing powder from being discharged from the spoon handle 12.

[0030] Several reinforcing support plates 121 are arranged inside the spoon handle 12; the reinforcing support plates 121 connect the closed end and the open end of the spoon handle 12, thereby strengthening the supporting ability of the spoon handle 12; there is 1 reinforcing support plate 121 in this embodiment.

[0031] The spoon tail includes a splint 131, a load block 132, a connecting plate 133, and a connecting screw; the connecting plate 133 is vertically connected to the end of the spoon handle 12; the load block 132 is arranged between the splint 131 and the connecting plate 133; a connecting nut 1331 is fixedly connected to the connecting plate 133; the connecting screw passes through the splint 131 and the load block 132 in sequence and is in threaded cooperation with the connecting nut 1331; the number of the load blocks 132 can be adjusted, that is, the load weight can be adjusted, so as to meet the requirements of different printing powders.

Claims

1. A powder-saving hopper provided inside a powder-shaking box, characterized in that, It includes a spoon-shaped main body and a photoelectric sensor; the spoon-shaped main body includes a spoon head, a spoon handle, and a spoon tail that are connected in sequence; on both sides of the bottom of the spoon head, there are card edge tubes that cooperate with the edge of the PET film; the spoon handle is hinged to the powder shaking box; a certain load is provided at the spoon tail; a photosensitive film is provided on the outside of the bottom of the spoon head; the photoelectric sensor is installed outside one side of the powder shaking box; a light-transmitting hole is provided on the side wall of the powder shaking box; after the sensing light of the photoelectric sensor passes through the light-transmitting hole, it cooperates with the sensing film; the electrical signal of the photoelectric sensor is associated with the powder distribution of the powder distribution box.

2. The powder-saving hopper provided inside the powder shaking box according to claim 1, characterized in that: A horizontal powder leakage port is provided at the bottom of the spoon head; there are several photosensitive films, which are evenly distributed along the length direction of the powder leakage port; the end of the photosensitive film is connected to the edge of the powder leakage port.

3. The powder-saving hopper provided inside the powder shaking box according to claim 1, characterized in that: It also includes mounting screws, a left distance-adjusting baffle and a right distance-adjusting baffle that are symmetrically arranged left and right; the left distance-adjusting baffle includes a baffle and a surrounding plate; the outer wall of the surrounding plate is closely attached to the inner wall of the spoon head; the card edge tube is connected to the inner wall of the lower part of the baffle; the right side edge of the baffle is connected to the left side edge of the surrounding plate; a horizontal adjusting long hole is provided on the surrounding plate; a mounting screw hole corresponding to the adjusting long hole is provided on the inner wall of the spoon head; the mounting screw passes through the adjusting long hole and is in threaded cooperation with the mounting screw hole.

4. The powder-saving hopper provided inside the powder shaking box according to claim 3, characterized in that: There are several mounting screw holes; the several mounting screw holes are symmetrically arranged with respect to the left-right symmetry center plane of the spoon head.

5. The powder-saving hopper provided inside the powder shaking box according to claim 3, characterized in that: A longitudinal powder discharge port is provided at the bottom of the surrounding plate.

6. The powder-saving hopper provided inside the powder shaking box according to claim 3, characterized in that: The front edge of the spoon head extends forward to form a front extension plate A; the front edge of the surrounding plate extends forward to form a front extension plate B; there are two adjusting long holes on the surrounding plate; one adjusting long hole is provided on the front extension plate B; a mounting screw hole corresponding to this adjusting long hole is provided on the front extension plate A; the other adjusting long hole is provided on the inner wall of the rear side of the surrounding plate; a mounting screw hole corresponding to the other adjusting long hole is provided on the inner wall of the rear side of the spoon head.

7. The powder-saving hopper provided inside the powder-shaking box according to claim 1, characterized in that: The spoon head is arranged inside the powder shaking box; the spoon tail is arranged outside the powder shaking box; the spoon handle penetrates through the rear side wall of the powder shaking box.

8. The powder-saving hopper provided inside the powder-shaking box according to claim 7, characterized in that: A mounting hole matching the spoon head is provided on the rear side wall of the powder shaking box; the powder-saving hopper arranged inside the powder shaking box further includes a guiding hopper installed below the spoon handle; the guiding hopper includes a rear folding plate and side plates; the upper part of the rear folding plate is bent backward; the lower part of the rear folding plate is connected to the rear side wall of the powder shaking box; one end of the side plate is connected to the edge of the upper part of the rear folding plate, and the other end abuts against the rear side wall of the powder shaking box.

9. The powder-saving hopper provided inside the powder-shaking box according to claim 8, characterized in that: Several vertical mounting long holes are arrayed on the lower edge of the rear folding plate; the lower part of the rear folding plate is connected to the powder shaking box through the mounting long holes and screws.

10. The powder-saving hopper provided inside the powder shaking box according to claim 1, wherein: The horizontal cross-section of the spoon head is equivalent to the horizontal cross-section of the bottom of the powder shaking box.

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