TW201929960A - Negative pressure painting method for toast box and painting fixture thereof preventing the vacuum phenomenon caused by the vortex and turbulent current at the corners of the toast box - Google Patents

Abstract

The invention discloses a negative pressure painting method for a toast box and a painting fixture thereof. A vacuuming means is communicated with a discharge port of the painting fixture. A positioning means is placed in the chamber, and the toast box is inlayed from the inlay port to a position that can be supported by the positioning means, so that there is a space between the toast box and the bottom of the body. The vacuuming means is launched to cause the chamber to form a negative pressure state, so that air near the corners of the toast box is sucked from the guiding pores to thereby form a guiding airflow between each guiding pore and the discharge port. The paint is sprayed on the inner surface of the toast box using a spray device. When the spray device is close to the corners of the toast box, the surfaces of the corners of the toast box can be evenly coated with paint through the guiding effect of the guiding airflow. As such, the pass rate and quality of painting the product can be improved by preventing the vacuum phenomenon caused by the vortex and turbulent current at the corners of the toast box.

Description

Negative pressure painting method of toast box and painting fixture thereof

The invention relates to a negative pressure painting method and a painting fixture for a toast box, in particular to a negative pressure painting fixture technology which can avoid the vacuum phenomenon of swirling turbulence in the corner of the toast box and make the spraying effect more uniform.

Press, the box used to bake food; or the toast box, mainly used in the molding of baking toast, bread or cake. Among them, the toast box is a toast forming mold which is often used in the field of baking technology. In the field of processing technology of the existing baking utensils, after the torus box is folded and formed, a pre-treatment step and a sandblasting step must be performed. Among them, the pre-treatment step is mainly to remove the oil stain on the outer surface of the toast box. The blasting step is to apply the blasting material to the inner surface of the toast box; here, the spraying step of the lacquer can be carried out, and the lacquer spraying step is mainly to sequentially apply the primer and the top lacquer on the inner surface of the toast box (such as DuPont's Teflon coating; or other paints).

In general, as shown in FIG. 5, in the paint spraying operation of the conventional toast box, when the spray gun 101 is close to the corner of the toast box 100, since the corner of the toast box 100 is lacking in airflow guidance, The vacuum phenomenon of vortex turbulence is generated at the corner of the toast box 100 due to the reflection of the paint flow, so that the surface of the corner of the torus 100 is more difficult to uniformly adhere to the paint. In this case, if the torus 100 is to be gapped The uniform adhesion of the surface to the paint is indeed an unachievable skill. Moreover, since the four corners of the conventional toast box 10 are all dead spots of the spraying operation, the following defects are caused:

1. It is easy to cause the difference in film thickness between the inner surface and the corner gap of the toast box to be too large, so that the gap surface of the four corners of the toast box must be repaired, resulting in lower spraying yield and waste of time and paint. This causes inconvenience and great trouble in the spraying operation of the toast box paint.

2. The operation of the toast box painting is difficult and laborious. Except for the difference in the spraying effect between the corners of the toast box and the inner surface, the lack of uniformity of the paint spraying due to the increase of the paint rebound is also caused.

In view of this, how to develop a toast box paint fixture technology that can avoid the turbulent vacuum phenomenon of the vortex of the toast box corner to improve the qualified rate of product spraying has become a technical problem that the relevant industry needs to solve and challenge. .

The main object of the present invention is to provide a negative pressure painting method for a toast box and a painting fixture thereof, which are mainly constructed by a negative pressure air flow to avoid the phenomenon of retarding vacuum caused by swirling turbulence at the corner of the toast box. Therefore, the utility model has the advantages of simple structure, simple and easy painting operation, more uniform spraying effect, good spraying qualification rate, reduced paint rebound, greatly reduced four corner gap replenishing chances, and saving paint and working hours. The technical means for achieving the main object of the present invention is to connect the vacuuming means with the discharge port of the paint fixture; and place the positioning means in the chamber, and then embed the toast box from the fitting to the position which can be supported by the positioning means. Above, the toast box has a space from the bottom of the body. The vacuuming means is opened to cause the chamber to form a negative pressure state, so that air near the corner of the toast box is sucked from the guiding pores, so that a guiding airflow is formed between the respective guiding pores and the discharge opening. The paint is sprayed on the inner surface of the toast box. When the spray device is close to the corner of the toast box, the surface of the toast box can be evenly distributed by guiding the airflow. Paint the paint.

10,100‧‧‧ toast box

11‧‧‧Border

12‧‧‧ Diversion pores

20‧‧‧painting fixture

21‧‧‧ body

210‧‧‧ chamber

211‧‧‧Inlet

212‧‧‧Export

22‧‧‧ Positioning means

22a‧‧‧ slotted

22b‧‧‧Support frame

220‧‧‧guide hole

30‧‧‧vacuum means

40‧‧‧painting device

41,101‧‧‧ spray gun

D‧‧‧ spacing

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the implementation of paint spraying on a toast box of the present invention.

Fig. 2 is a schematic view showing the concrete implementation of the coating of the toast box paint of the present invention.

Fig. 3 is a schematic cross-sectional view showing the paint spraying of the toast box of the present invention.

Fig. 4 is a schematic cross-sectional view showing another embodiment of the paint of the present invention.

Fig. 5 is a schematic view showing the implementation of a paint spraying by a conventional toast box.

In order to allow the reviewing committee to further understand the technical features of the present invention and the technical means for achieving the object of the present invention, it will be described in detail by way of specific embodiments with reference to the following: For the specific embodiment of the present invention, the present embodiment includes the following steps: (a) pre-processing step: placing the toast box 10 which has been previously processed by folding forming, frame curling, and embedding frame strips at 400-420 Celsius Baking in a °C oven for about 20 to 30 minutes to remove oil stains on the outer surface of the toast box 10.

(b) Sand blasting step: The toast box 10 is placed in a sand blasting machine, and a blasting material is placed in the blasting machine at a blasting pressure of 4 to 5 kg to spray-coat the inner surface of the toast box 10.

(c) Material preparation step: a painting fixture 20, a toast box 10 to be processed, a vacuuming means 30 (such as a combination of an air pump and a pipe), and a painting device 40 are provided.

(d) mounting step: the vacuuming means 30 is connected to the discharge port 212 of the paint fixture 20; and the positioning means 22 (the holder shown in FIG. 4) is placed in the chamber 210, and then the toast box 10 is self-contained The insert 211 is embedded in a position that can be supported by the positioning means 22, so that the toast box 10 There is a gap D with the bottom of the body 21.

(e) Negative pressure state starting step: the vacuuming means 30 is turned on to cause the chamber 210 to form a negative pressure state, and at least one guiding airflow is generated between the corners and the chamber 210 by the negative pressure.

(f) Paint spraying step: as shown in FIGS. 1 to 3, the inner surface of the toast box 10 is subjected to at least one lacquer painting in a manual or automatic manner using a painting device 40, wherein the painting device 40 is close to the toast box 10 At the corners, the vacuum phenomenon of vortex turbulence at the corners of the toast box 10 due to the reflection of the paint airflow can be avoided by the guiding of the guiding airflow, thereby making the toast box 10 The corner gap surface can be uniformly coated with the paint.

Specifically, the paint spraying step further comprises the following steps: (f-1) a primer spraying step: the frame 11 of the toast box 10 is closely adhered to the edge of the fitting 211 of the painting fixture 20, and is transparently The vacuuming means 30 controls the negative pressure of the chamber 210 to be -50kp - 80kp; and the inner surface of the toast box 10 is sprayed with the spray gun 41 of the painting device 40, when the painting device 40 is close to the corner of the toast box 10, By guiding the airflow, the vacuum phenomenon of vortex turbulence at the corners of the toast 10 can be avoided due to the reflection of the paint airflow, so that the corner surface of the torus 10 can be The primer is uniformly applied; then, when the inner surface of the toast 10 is completely adhered to the primer, the spraying is stopped, and the toast box 10 is taken out from the painting fixture 20, and the outer surface of the toast 10 is cleaned, and then The primed toast 10 is baked in an oven at 115 to 125 ° C for about 15 to 20 minutes.

(f-2) Topcoat spraying step: The toast box 10 baked with the primer is placed on the fitting 211 of the painting fixture 20, so that the plurality of frames 11 of the toast box 10 and the fitting 211 of the painting fixture 20 are provided. The end edge is closely fitted, and the negative pressure of the chamber 210 is controlled by the vacuuming means 30 to be -50kp - 80kp; and the inner surface of the toast box 10 is sprayed with the spray gun 41 of the painting device 40, when the painting device 40 When it is close to the corner of the toast box 10, it can be avoided by the guiding of the guiding airflow. The reflection phenomenon affects the vacuum phenomenon of vortex turbulence at the corners of the toast box 10, so that the surface of the corner of the toast box 10 can be evenly coated with the topcoat, and then, when the inner surface of the toast box 10 is entirely After the topcoat is applied, the spraying is stopped, and the toast box 10 is taken out from the painting fixture 20, and the outer surface of the toast box 10 is cleaned, and then the primed toast 10 is baked in an oven at 350 to 420 ° C. Bake for about 25 to 30 minutes.

Specifically, referring to the embodiment shown in FIGS. 2 to 4, the painting fixture 20 includes a box-shaped body 21 and at least one positioning means 22. The inside of the body 21 has a cavity 210, and a fitting 211 is formed on the top surface of the body 21 in a shape matching with the plurality of frames 11 of the toast box 10. The bottom of the body 21 is provided with a row of outlets 212; and the toast box 10 is near the bottom. At least one diversion aperture 12 is formed in the vicinity of at least one corner.

Referring to the embodiment shown in FIG. 3, the positioning means 22 is a recess 22a which is recessed on the top surface of the body 21. The shape of the recess 22a matches the shape of the lower half of the toast box 10, and is available for the toast. The lower half of the box 10 is embedded, and the slot 22a is provided with a plurality of guide holes 220 corresponding to the flow guiding apertures 12, so that the toast box 10 has a spacing D from the bottom of the body 21.

Referring to the embodiment shown in FIG. 4, the positioning means 22 is a support frame 22b which can support the toast box 10, and has a spacing D between the toast box 10 and the bottom of the body 21.

The toast box 10 has four corners, and each of the two adjacent corners is provided with a diversion aperture 12 near the bottom of the adjacent side surface. The aperture of the diversion aperture 12 is between 1 and 8 mm. The discharge port 212 is located at the bottom of the body 21, and the discharge port 212 is connected to a vacuuming means 30. The discharge port 212 has a rectangular shape with a length of 80 to 92 mm and a width of 20 to 25 mm.

Therefore, after the description of the above specific embodiments, the present invention can be constructed by the function of the negative pressure airflow to avoid the retarding vacuum of the swirling turbulence of the torus box corner. The image has the advantages of simple structure, simple and easy painting operation, more uniform spraying effect, good spraying qualification rate, reduced paint rebound, greatly reduced the probability of four corner gaps, and saving paint and working hours.

The above is only a possible embodiment of the present invention, and is not intended to limit the scope of the patents of the present invention, and the equivalent implementations of other changes according to the contents, features and spirits of the following claims should be It is included in the patent of the present invention. The invention is specifically defined in the structural features of the request item, is not found in the same kind of articles, and has practicality and progress, has met the requirements of the invention patent, and has filed an application according to law, and invites the bureau to approve the patent according to law to maintain the present invention. The legal rights of the applicant.

Claims (10)

A negative pressure painting method for a toast box, comprising the following steps: a material preparation step: providing a painting fixture, a toast box to be processed, a vacuuming device, and a painting device; wherein the painting treatment comprises a box-shaped body And at least one positioning means, the body has a chamber inside, and a top surface of the body is provided with a shape matching the outer shape of the toast box, and the body is provided with a row of outlets; the toast box is near at least one side of the bottom At least one diversion aperture is formed near the corner; and the installation step is: connecting the vacuuming means to the discharge port of the paint fixture; and placing the positioning means in the chamber, and then inserting the toast box The mouth is embedded in a position that can be supported by the positioning means, so that the toast box has a space from the bottom of the body; and the negative pressure state starts the step of: opening the vacuuming means to make the chamber form a negative pressure state, and At least one guiding airflow is generated between the corners and the chamber by a negative pressure; and a paint spraying step; and the inner surface of the toast box is subjected to at least one paint by the painting device Paint, wherein the spray means when the toast adjacent the corners of the cartridge can be guided by the guiding action of the gas stream, so that the surface near the corners of the cartridge toast the paint can be uniformly coated. The negative pressure painting method of the toast box according to claim 1, wherein before the mounting step, a pre-processing step is further included, and when the pre-processing step is performed, the toast box is placed at 400 to 420 ° C Bake in the oven for 20 to 30 minutes at high temperature to remove oil stains on the outer surface of the toast. The negative pressure painting method of the toast box according to claim 1, wherein a step of blasting is further included before the mounting step, and when the blasting step is performed, the toast box is placed in a blasting machine, and the blasting is performed The blasting material is placed in the machine, and the inner surface of the toast box is sandblasted with a blasting pressure of 4 to 5 kg. The negative pressure painting method of the toast box according to claim 1, wherein the paint spraying step further comprises the following steps: Primer spraying step: the outer edge of the toast box is closely adhered to the end edge of the printing fixture, and the vacuum pressure of the chamber is controlled by the vacuuming means to be -50kp - 80kp; The spray gun of the device applies primer coating to the inner surface of the toast box. When the inner surface of the toast box is completely attached to the primer, the spraying is stopped, and the toast box is taken out from the painting fixture, and the outer surface of the toast box is removed. The cleaning process is performed, and then the toast box coated with the primer is placed in an oven at 115 to 125 ° C for 15 to 20 minutes; and the top coat is sprayed: the toast box is baked and the toast is placed. And the outer edge of the toast box is closely adhered to the edge of the fitting of the paint fixture, and the vacuum of the chamber is controlled to be -50kp to -80kp by the vacuuming means. And spraying the inner surface of the toast box with the spray gun of the painting device, stopping spraying after the inner surface of the toast box is completely attached, and then removing the toast box from the painting fixture, and The outer surface of the toast box is cleaned and then coated The toast of the primer is baked in an oven at 350-420 ° C for about 25 to 30 minutes. The negative pressure painting method of the toast box according to claim 1, wherein the toast box has four corners, and each of the corners is adjacent to a bottom of the adjacent side surface, and one of the flow guiding apertures is respectively disposed. The negative pressure painting method of the toast box according to claim 1 or 5, wherein the diameter of the flow guiding pore is between 1 and 8 mm. The negative pressure painting method of the toast box according to claim 1, wherein the discharge port has a rectangular shape, and the rectangle has a length of 80 to 92 mm and a width of 20 to 25 mm. A negative pressure spray paint fixture for a toast box, comprising a box-shaped body having a chamber therein and at least one positioning means for being placed in the chamber; the top surface of the body is provided with a toast outside the toast to be processed A form-fitted insert, and the body is provided with a row of outlets. The negative pressure spray paint fixture of the toast box of claim 8, wherein the lower half of the toast box can be embedded from the insert to a position that can be supported by the positioning means, so that the toast box and the The bottom of the body has a spacing. The negative pressure spray paint fixture of the toast box according to claim 8, wherein the discharge port is located at a bottom of the body, and the discharge port is in communication with a vacuuming means.