Butter paper forming method and apparatus

Abstract

The application discloses a beef tallow paper forming method and device, and the beef tallow paper forming method comprises the following steps: conveying the beef tallow paper to a preforming station, so that one side of the beef tallow paper corresponds to a mold feeding channel, and the other side corresponds to a mold block; the preformed beef tallow paper is an initial beef tallow paper comprising a bottom surface and a height surface; a plurality of corner blocks are driven to cooperate with the mold block, so that the notches of the corner blocks press-connect the bottom surface and the height surface of the initial beef tallow paper, to form a formed beef tallow paper with a corner. The application reduces the rebound force of the beef tallow paper on the corner structure, greatly overcomes the problem that the traditional paper forming shovel plate cannot make the beef tallow paper bend and form due to the large toughness, improves the forming quality of the shovel edge corner since the bending part of the beef tallow paper has been pre-formed, improves the forming stability, and the application has a good control effect on the forming quality of the beef tallow paper.

Description

Technical Field

[0001] This invention relates to the field of greaseproof paper processing technology, and in particular to a greaseproof paper forming method and apparatus. Background Technology

[0002] Greaseproof paper is a commonly used lining in high-end packaging boxes. It's used to wrap the product before placing it inside the box, providing internal moisture protection. In traditional packaging box manufacturing, pre-filling the greaseproof paper into the box is done by hand, which suffers from low folding precision and low production efficiency. Summary of the Invention

[0003] The main objective of this invention is to provide a method and apparatus for forming greaseproof paper, which aims to solve the problems of low folding accuracy and low production efficiency of greaseproof paper in the traditional packaging box forming field.

[0004] To achieve the above objectives, the present invention proposes a method for forming greaseproof paper, comprising the following steps:

[0005] The paper is conveyed to the pre-forming station so that one side of the paper corresponds to the mold inlet channel and the other side corresponds to the mold block.

[0006] Pre-formed greaseproof paper is an initial greaseproof paper including the bottom surface and the height surface;

[0007] Multiple corner blocks are driven to cooperate with the mold block, so that the notches of each corner block press against the bottom and height surfaces of the initial greaseproof paper to form a shaped greaseproof paper with corners.

[0008] Optionally, the process of "transporting the paper to the pre-forming station" includes the following steps:

[0009] The paper sheets are sequentially drawn from the loading station to the pre-forming station;

[0010] The paper is fed into the finishing mold, and the folded area of ​​the paper is aligned with the opening of the finishing mold.

[0011] Optionally, when "the pre-formed greaseproof paper is an initial greaseproof paper including the bottom surface and the height surface", the following steps are included:

[0012] The mold block and the greaseproof paper are pushed into the mold channel. The bottom wall of the mold block presses against the bottom surface of the greaseproof paper and the folded side wall corresponds to the height surface of the greaseproof paper, so that each fold line of the greaseproof paper faces the corresponding folded block to form the initial greaseproof paper.

[0013] Optionally, the bottom wall of the mold block is horizontal, the angle between the bottom wall and the corner side wall of the mold block is acute, the angle between the top wall and the corner side wall is acute, and the angle between the inner wall surfaces of the notches of each corner block is greater than or equal to the angle between the bottom wall and the corner side wall of the mold block and the angle between the top wall and the corner side wall, and does not exceed 90°.

[0014] The process of "driving multiple corner blocks to cooperate with the mold block, so that the notches of each corner block press against the bottom and height surfaces of the initial greaseproof paper" includes the following steps:

[0015] Drive each corner block and make the notch of each corner block match the intersecting side edge of the top wall and the corner side wall of the mold block, as well as the intersecting side edge of the bottom wall and the corner side wall, so that the edge of the folded part of the formed greaseproof paper is located between the notch of the corner block and the gap of the mold block.

[0016] Furthermore, the present invention also proposes a paper forming apparatus, comprising:

[0017] A base, wherein the base is provided with a trimming station and a die-feeding channel, the trimming station being located at one end of the die-feeding channel, and the greaseproof paper being placed at the other end of the die-feeding channel; and,

[0018] The edge-trimming mechanism includes a die-feeding structure and a bend structure movably disposed on the base. The die-feeding structure has a travel along the extension direction of the die-feeding channel, and the bend structure has a travel from the adjacent side of the die-feeding channel into the edge-trimming station.

[0019] The die-feeding structure and the die-feeding channel cooperate to form a bottom surface and a height surface of the paper in the die-feeding channel and reach the edge-cutting station. The folding structure is used to fold the height surface of the paper into an angle.

[0020] Optionally, the die-feeding structure includes a die block having a movable stroke along the extension direction of the die-feeding channel, the die block having a bottom wall for pressing the bottom surface of the greaseproof paper and a folded side wall for corresponding to the height surface of the greaseproof paper;

[0021] The edge-scraping mechanism also includes a base plate located at the edge-scraping station. The base plate cooperates with the bottom wall of the mold block to jointly define the bottom surface of the greaseproof paper.

[0022] The angled structure includes a plurality of angled blocks movably disposed on the adjacent side of the mold inlet channel. The plurality of angled blocks have a movable stroke from the adjacent side of the mold inlet channel into the edge-scraping station, and each has a notch with its inner wall facing the mold block to press against the intersecting side edges of the top wall and the angled side wall of the mold block, as well as the intersecting side edges of the bottom wall and the angled side wall.

[0023] Optionally, the bottom wall of the mold block is horizontal, the angle between the bottom wall and the corner side wall of the mold block is acute, and the angle between the top wall and the corner side wall is acute.

[0024] The included angle of the inner wall surface of the notch of the plurality of corner blocks is greater than or equal to the included angle between the bottom wall and the corner side wall of the mold block, and the included angle between the top wall and the corner side wall, and does not exceed 90°;

[0025] The plurality of corner blocks cooperate with the mold block, such that the inner edges of the notches of the plurality of corner blocks abut against the edges of the bottom wall and the edges of the corner sidewall of the mold block.

[0026] Optionally, the angle between the bottom wall of the mold block and the corner sidewall ranges from 85° to 89°; and / or,

[0027] The angle between the top wall of the mold block and the corner side wall ranges from 85° to 89°; and / or,

[0028] The included angle of the notches in the multiple corner blocks is all between 86° and 90°.

[0029] Optionally, the plurality of corner blocks include two upper corner blocks disposed on the left and right sides of the upper end of the mold block, and two lower corner blocks disposed on the left and right sides of the lower end of the mold block;

[0030] The angled structure also includes:

[0031] Two first angle linkages and two second angle linkages are used to drive the two upper angle blocks and the two lower angle blocks to move, respectively; and,

[0032] A left mounting plate and a right mounting plate are respectively disposed on the left and right sides of the mold block. The two first angle connecting rods are movably disposed at the upper ends of the left mounting plate and the right mounting plate, and the two second angle connecting rods are movably disposed at the lower ends of the left mounting plate and the right mounting plate.

[0033] Optionally, the two first angle connecting rods are inclined downward toward one end of the mold block.

[0034] Optionally, the base is further provided with a pre-forming station, which is used to place the greaseproof paper to be processed. The pre-forming station and the edge-trimming station are located at both ends of the mold inlet channel, respectively.

[0035] The paper forming device further includes a finishing mold located at the preforming station. The finishing mold has an opening that corresponds to and communicates with the mold inlet channel and cooperates with the mold block. The finishing mold has multiple push plates that are movably arranged to push the folded corner area of ​​the paper to the opening.

[0036] Optionally, the opening of the finishing mold is provided with a plurality of limiting rods arranged along the extension direction of the mold inlet channel, and the plurality of limiting rods are distributed and spaced apart along the circumference of the mold inlet channel.

[0037] Optionally, the base is further provided with a feeding station, which is used to stack multiple sheets of greaseproof paper in the vertical direction, and the feeding station is located at the preforming station;

[0038] The paper forming device further includes a feeding mechanism located at the feeding station. The feeding mechanism includes a suction structure that sucks up the paper in the vertical direction and has a travel stroke that allows it to enter the pre-forming station from the side. The suction structure cooperates with the mold block to place the paper into the pre-forming station.

[0039] Optionally, the feeding mechanism further includes:

[0040] A feeding base, located at the feeding station, on which multiple sheets of parchment paper are stacked vertically; and...

[0041] Multiple paper-picking rods are movably installed on the base. The multiple paper-picking rods are horizontally arranged and spaced apart in sequence. The multiple paper-picking rods have a movable stroke from the adjacent side of the feeding base to the bottom of the stacked greaseproof paper, and a movable stroke in the vertical direction.

[0042] The feeding base is provided with multiple grooves that cooperate with the multiple paper picking rods, and the multiple paper picking rods extend into the corresponding grooves and move upward.

[0043] In the technical solution of this invention, when the edge-shaving and corner-folding of the greaseproof paper begins, the greaseproof paper can maintain its bent state, reducing the rebound force on the corner structure. This largely overcomes the problem that the traditional paper forming spade cannot bend the greaseproof paper due to its high toughness. Since the bending point of the greaseproof paper has already been pre-formed, the forming quality of the edge-shaving and corner-folding is improved, and the forming stability is enhanced. The technical solution of this invention has a good control effect on the forming quality of greaseproof paper. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0045] Figure 1A schematic flowchart of an embodiment of the paper forming method provided by the present invention;

[0046] Figure 2 A schematic flowchart of another embodiment of the paper forming method provided by the present invention;

[0047] Figure 3 This is a schematic diagram illustrating the cooperation between the mold block and the corner block during the implementation of the paper forming method provided by the present invention.

[0048] Figure 4 This is a schematic diagram of the structure of the paper forming apparatus provided by the present invention;

[0049] Figure 5 for Figure 4 Schematic diagram of the structure of the paper forming device after removing the base.

[0050] Figure 6 for Figure 5 A schematic diagram of the structure of part A in the diagram;

[0051] Figure 7 for Figure 4 A schematic diagram of the structure when the mold block and the angled structure are combined.

[0052] Figure 8 for Figure 7 A schematic diagram of the structure of part B in the diagram;

[0053] Figure 9 for Figure 4 A schematic diagram of the finishing mold in the middle;

[0054] Figure 10 for Figure 4 A schematic diagram of the feeding mechanism in the middle;

[0055] Figure 11 for Figure 10 A schematic diagram of the drive mechanism for the paper-picking rod.

[0056] Explanation of icon numbers:

[0057] label name label name 1 base 32 mold block 11 Material loading station 321 Top wall 12 Preforming station 322 bottom wall 13 Edge trimming station 323 Angled sidewall 21 Feeding base 33 base plate 211 groove 4 Mold making 221 Paper picker 41 Open 222 crossbar 42 push plate 223 rack 43 Push plate drive cylinder 224 gear 44 baffle 225 Rotary drive cylinder 45 Limit bar 226 Column 51 Upper corner block 23 Adsorption plate 511 First angle cylinder 24 Adsorption drive cylinder 512 First angle connecting rod 25 Slide 52 Lower corner block 26 slide rail 521 Second angle cylinder 27 Limiting post 522 Second angle connecting rod 28 Limit plate 53 gap 31 control device 6 Butter paper

[0058] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0059] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0060] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0061] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0062] Greaseproof paper is a commonly used lining in high-end packaging boxes. It's used to wrap the product before placing it inside the box, providing internal moisture protection. In traditional packaging box manufacturing, pre-filling the greaseproof paper into the box is done by hand, which suffers from low folding precision and low production efficiency.

[0063] In view of this, the present invention provides a method and apparatus for forming tallow paper. Figures 1 to 2 This is a specific embodiment of the paper forming method provided by the present invention. Figure 3 This is a schematic diagram illustrating the cooperation between the mold block and the corner block during the implementation of the greaseproof paper forming method. Figures 4 to 11 This is a specific embodiment of the paper forming apparatus provided by the present invention.

[0064] This invention provides a method for forming tallow paper; please refer to [link / reference]. Figure 1 The method for forming the greaseproof paper specifically includes the following steps:

[0065] S100: Convey the greaseproof paper 6 to the pre-forming station 12, so that one side of the greaseproof paper 6 corresponds to the mold inlet channel and the other side corresponds to the mold block 32.

[0066] Please see Figures 3-11 In this step, the mold block 32 pushes the greaseproof paper 6 from the pre-forming station 12 into the mold inlet channel. Through the cooperation between the mold block 32 and the mold inlet channel, the greaseproof paper 6 is pre-formed into the bottom and height surfaces within the mold inlet channel.

[0067] Furthermore, step S100, "conveying the greaseproof paper 6 to the pre-forming station 12," includes the following steps:

[0068] S110: From the feeding station 11, the greaseproof paper 6 is sequentially absorbed to the pre-forming station 12.

[0069] It should be noted that the mold inlet channel extends vertically, and the mold block 32 pushes the kraft paper 6 downward into the edge-trimming station 13, which facilitates the cooperation between the corner-folding structure and the mold block 32. At the feeding station 11, multiple sheets of kraft paper 6 are also stacked vertically, so that the kraft paper 6 remains flat during the conveying process, which simplifies the structure of the device. The kraft paper 6 is conveyed to the pre-forming station 12 through the adsorption structure, which greatly improves the success rate of obtaining kraft paper 6 at the pre-forming station 12, and increases production output and processing efficiency.

[0070] S120: Convey the greaseproof paper 6 to the finishing mold 4, and make the folded area of ​​the greaseproof paper 6 correspond to the opening 41 of the finishing mold 4.

[0071] It should be noted that, in order to facilitate the receiving of the kraft paper 6 at the preforming station 12, the area at the preforming station 12 is larger than the area of ​​the kraft paper 6. Therefore, after the kraft paper 6 is conveyed to the preforming station 12, the finishing mold 4 adjusts the position of the kraft paper 6 so that its folded corner area corresponds to its opening 41, thus ensuring the accuracy of the folded corner.

[0072] S200: Pre-formed greaseproof paper 6 is initial greaseproof paper 6 including the bottom surface and the height surface.

[0073] The kraft paper 6 has high toughness and is prone to rebound after bending. If the kraft paper 6 is still in a flat state when bending begins, the forming quality of the kraft paper 6 will be poor. In this step, before bending the kraft paper 6, it is pre-formed so that it is bent or folded to form a bottom surface and a height surface. The intersection of the bottom surface and the height surface is the part to be trimmed and bent. In this way, when trimming and folding the corners of the kraft paper 6 begins, the kraft paper 6 can maintain its bent state and reduce the rebound force of the kraft paper 6 on the folded corner structure.

[0074] S300: The bottom and height surfaces of the initial greaseproof paper 6 are trimmed to form a shaped greaseproof paper 6 with folded corners.

[0075] It should be noted that the kraft paper 6 has considerable toughness. If the traditional method of edge trimming and corner folding is used for shaping, springback will occur because there is no shape-preserving feature on the stress surface. In this step, both the bottom and height surfaces of the initial kraft paper 6 are trimmed. The corner folding structure used for edge trimming and corner folding completely covers the two planes forming the corners on the bottom and height surfaces of the kraft paper 6. During shaping, the two planes remain under pressure, thus improving the reliability of bending and shaping.

[0076] The greaseproof paper forming method of the present invention pre-forms a bend in the greaseproof paper 6 before bending, which largely overcomes the problem that the traditional paper forming spatula cannot bend the greaseproof paper 6 due to its high toughness. It improves the forming quality of the edge folding and corner forming, enhances the forming stability, and has a good control effect on the forming quality of the greaseproof paper 6.

[0077] Further, please refer to Figure 2 Step 200 specifically includes the following steps:

[0078] S210: Push the mold block 32 and the kraft paper 6 into the mold channel. The bottom wall 322 of the mold block 32 presses against the bottom surface of the kraft paper 6 and the folded side wall 323 corresponds to the height surface of the kraft paper 6, so that each folded line of the kraft paper 6 faces the corresponding folded block to form the initial kraft paper 6.

[0079] Please see Figures 3-11 In this embodiment, the corner block includes two upper corner blocks 51 and two lower corner blocks 52, which correspond to the edges of the four fold lines of the kraft paper 6. Each corner block is provided with a notch 53. When each corner block enters the edge-shaving station 13, it is pressed onto the mold block 32 for processing and forming the four edges, and wraps around the edges of the folded part of the kraft paper 6, which improves the reliability of bending and forming.

[0080] Furthermore, the bottom wall 322 of the mold block 32 is horizontally arranged, the angle between the bottom wall 322 and the corner side wall 323 of the mold block 32 is acute, the angle between the top wall 321 and the corner side wall 323 is acute, and the angle between the inner wall surfaces of the notches 53 of each corner block is greater than or equal to the angle between the bottom wall 322 and the corner side wall 323 of the mold block 32, and the angle between the top wall 321 and the corner side wall 323, and does not exceed 90°. Step 300 specifically includes the following steps:

[0081] S310: Drive each corner block and press each corner block against the intersecting side edge of the top wall 321 and the corner side wall 323 of the mold block 32, as well as the intersecting side edge of the bottom wall 322 and the corner side wall 323, so that the initial greaseproof paper 6 forms a shaped greaseproof paper 6 with corners, and the corners are located between the notch 53 of the corner block and the gap of the mold block 32.

[0082] In this embodiment, the inner edges of the notches 53 of the multiple corner blocks abut against the edges of the bottom wall 322 and the corner sidewall 323 of the mold block 32. When the corner blocks are engaged with the mold block 32, the corner angle of the grease paper 6 is an acute angle, which can significantly reduce the rebound of the grease paper 6 after bending due to its high toughness.

[0083] The kraft paper forming method provided by this invention allows the kraft paper 6 to maintain its bent state when the edges and corners are first folded, reducing the rebound force on the folded corner structure. This largely overcomes the problem that traditional paper forming shovels cannot bend the kraft paper 6 due to its high toughness. At the same time, since the bending point of the kraft paper 6 is pre-formed, the forming quality of the edges and corners is improved, the forming stability is enhanced, and the forming quality of the kraft paper 6 is well controlled.

[0084] Based on the butter paper forming method proposed in this invention, this invention also proposes a butter paper forming apparatus. (See attached image.) Figure 3-11 This is a specific embodiment of the paper forming device. In this embodiment, the paper forming device includes a base 1 and a scraping mechanism. The base 1 is provided with a scraping station 13 and a mold feeding channel. The scraping station 13 is located at one end of the mold feeding channel, and the paper 6 is placed at the other end of the mold feeding channel. The scraping mechanism includes a mold feeding structure and a folding structure movably disposed on the base 1. The mold feeding structure has a moving stroke along the extension direction of the mold feeding channel, and the folding structure has a moving stroke from the adjacent side of the mold feeding channel into the scraping station 13. The mold feeding structure and the mold feeding channel cooperate to form a bottom surface and a height surface of the paper 6 in the mold feeding channel and reach the scraping station 13. The folding structure is used to fold and form the height surface of the paper 6.

[0085] In this embodiment, the die-feeding structure pushes the flat kraft paper 6 into the die-feeding channel. Through the cooperation of the die-feeding structure and the die-feeding channel, the kraft paper 6 is bent within the die-feeding channel, forming a bottom surface and a height surface. The intersection of the bottom surface and the height surface is the area to be trimmed and bent. In this way, when trimming and folding the kraft paper 6 begins, the kraft paper 6 can maintain its bent state, thereby largely overcoming the problem that the traditional paper forming scraper cannot bend and form the kraft paper 6 due to its high toughness. At the same time, since the bending point of the kraft paper 6 has been pre-formed, the forming quality of trimming and folding is improved, and the forming stability is enhanced. The kraft paper forming device of this embodiment has a good control effect on the forming quality of the kraft paper 6.

[0086] Furthermore, in this embodiment, the mold feeding channel extends vertically, and the mold block 32 presses the greaseproof paper 6 into the mold feeding channel vertically, which helps to maintain its pre-formed bent shape. The mold block 32 is driven by the mold control device 31 to move up and down.

[0087] In this embodiment of the invention, the two ends of the mold inlet channel correspond to the greaseproof paper 6 and the edge trimming station 13, respectively. The folded structure enters the edge trimming station 13 from the adjacent side of the mold inlet channel, making the device structure compact and the processing efficiency high.

[0088] Further, please refer to Figures 6-8 The die-feeding structure includes a die block 32 with a movable stroke along the extension direction of the die-feeding channel. The die block 32 has a bottom wall 322 for pressing the bottom surface of the kraft paper 6 and a folded side wall 323 for corresponding to the height surface of the kraft paper 6. The trimming mechanism also includes a base plate 33 located at the trimming station 13. The base plate 33 cooperates with the bottom wall 322 of the die block 32 to jointly define the bottom surface of the kraft paper 6. The folding structure includes a plurality of folding blocks movably located on the adjacent side of the die-feeding channel. The plurality of folding blocks have a movable stroke from the adjacent side of the die-feeding channel into the trimming station 13, and each has a notch 53 with its inner wall facing the die block 32 to press the intersecting side edges of the top wall 321 and the folded side wall 323 of the die block 32, as well as the intersecting side edges of the bottom wall 322 and the folded side wall 323.

[0089] To further enhance the edge-shaving and corner-folding effect, in this embodiment, at edge-shaving station 13, the base plate 33 cooperates with the bottom wall 322 of the mold block 32 to firmly clamp and fix the kraft paper 6, ensuring that the corners of the kraft paper 6 are accurately and stably oriented towards the corner structure. In this embodiment, the formed kraft paper 6 is enclosed on four sides and has two overlapping edges. Therefore, four corner-folding blocks are set, located at the four corners of the mold block 32 respectively. The notches 53 of the four corner-folding blocks are set facing the four corners of the mold block 32. The inner wall surface of the notch 53 refers to the two wall surfaces of the notch 53 itself. When the corner-folding blocks enter edge-shaving station 13, the notches 53 press against the four corners of the mold block 32, thereby realizing the bending and forming of the kraft paper 6. The setting of corner-folding blocks is determined by the forming shape and the number of folds of the kraft paper 6, so its number is not limited to four.

[0090] Furthermore, the base plate 33 is elastically telescopic in the extension direction of the mold inlet channel, which serves to buffer the downward impact force of the mold block 32 and reduce wear between the equipment.

[0091] Furthermore, the bottom wall 322 of the mold block 32 is horizontally arranged, and the angle between the bottom wall 322 and the corner side wall 323 of the mold block 32 is an acute angle, as is the angle between the top wall 321 and the corner side wall 323. The angles of the inner walls of the notches 53 of the multiple corner blocks are all greater than or equal to the angles between the bottom wall 322 and the corner side wall 323 of the mold block 32, and the angle between the top wall 321 and the corner side wall 323, and do not exceed 90°. The multiple corner blocks cooperate with the mold block 32, so that the inner edges of the notches 53 of the multiple corner blocks abut against the edges of the bottom wall 322 and the corner side wall 323 of the mold block 32. In this embodiment, when the corner blocks cooperate with the mold block 32, the folding angle of the kraft paper 6 is an acute angle, which can significantly reduce the rebound of the kraft paper 6 after bending due to its high toughness. Since the kraft paper 6 is relatively thin, the difference between the included angle of the inner wall of the notch 53 of the corner block and the included angle between the bottom wall 322 and the corner side wall 323 of the mold block 32, and the included angle between the top wall 321 and the corner side wall 323, should not be too large; a difference of 1° is sufficient. Since the height surface of the kraft paper 6 needs to be trimmed and folded twice, the second trimming and folding helps to strengthen and maintain the included angle formed by the first trimming and folding. Therefore, it is also acceptable for the bottom wall 322 and the corner side wall 323 of the mold block 32 to be set at a right angle.

[0092] Further, please refer to Figure 8 The angle between the top wall 321 of the mold block 32 and the corner side wall 323 is α1, which ranges from 85° to 89°. Although the kraft paper 6 is tough and difficult to bend, the corner angle should not be sharp, otherwise it will damage the kraft paper 6. The kraft paper 6 is relatively light and thin, so 85°-89° is a more reasonable angle range. After multiple tests, the preferred embodiment of this angle is 89°.

[0093] Alternatively, the angle between the bottom wall 322 of the mold block 32 and the corner side wall 323 can be set to α2, which ranges from 85° to 89°. This is more conducive to the forming of the grease paper 6 into a four-sided enclosure with two overlapping edges. Similarly, after multiple tests, the preferred embodiment of this angle is 89°.

[0094] Alternatively, in this embodiment, the multiple corner blocks include a corner block located on the upper side and a corner block located on the lower side. The included angle of the notch 53 of the corner block located on the upper side is β1, and the included angle of the notch 53 of the corner block located on the lower side is β2. The range of β1 and β2 is 86°-90°. Specifically, the difference between β1 and α1 and the difference between β2 and α2 can both be 1°. Therefore, in this embodiment, the preferred embodiment of the included angle is 90°. The included angle of 90° actually simplifies the structure of the corner block, thereby reducing the equipment cost.

[0095] Furthermore, the aforementioned angle range can be implemented simultaneously, and the folding angles within the aforementioned angle range can effectively reduce the rebound of the greaseproof paper after bending.

[0096] Further, please refer to Figure 6 and Figure 7 The multiple corner blocks include two upper corner blocks 51 located on the left and right sides of the upper end of the mold block 32, and two lower corner blocks 52 located on the left and right sides of the lower end of the mold block 32. The corner structure also includes two first corner connecting rods 512 and two second corner connecting rods 522, as well as a left mounting plate and a right mounting plate. The two first corner connecting rods 512 and two second corner connecting rods 522 are used to drive the two upper corner blocks 51 and the two lower corner blocks 52 to move respectively. The left mounting plate and the right mounting plate are located on the left and right sides of the mold block 32. The two first corner connecting rods 512 are movably inserted through the upper ends of the left mounting plate and the right mounting plate, and the two second corner connecting rods 522 are movably inserted through the lower ends of the left mounting plate and the right mounting plate. In this embodiment, the two first angle connecting rods 512 drive the two upper angle blocks 51 to move under the drive of the two first angle cylinders 511, and the two second angle connecting rods 522 drive the two lower angle blocks 52 to move under the drive of the two second angle cylinders 521, so that the position of each angle block is accurate.

[0097] Furthermore, the two first folding connecting rods 512 are inclined downwards towards one end of the mold block 32. This setting further strengthens the formation of an acute folding angle on the greaseproof paper 6. Furthermore, the lower end of the left mounting plate is set vertically, and the upper end is inclined towards the mold block 32. The inclination angle is set to 1°, corresponding to the difference between β1 and α1. Both first folding connecting rods 512 are set at a 90° angle with the upper end of the left mounting plate, that is, they are inclined towards the mold block 32 along with the upper end of the left mounting plate. Of course, the right mounting plate is set symmetrically with the left mounting plate.

[0098] In other embodiments, the left mounting plate may be arranged vertically, so that the two first angle connecting rods 512 are tilted downward toward one end of the mold block 32, which can also achieve the above effect.

[0099] Further, please refer to Figure 9The base 1 is also equipped with a pre-forming station 12, which is used to place the kraft paper 6 to be processed. The pre-forming station 12 and the edge-trimming station 13 are located at both ends of the mold inlet channel, respectively. The kraft paper forming device also includes a finishing mold 4 located at the pre-forming station 12. The finishing mold 4 has an opening 41 that corresponds to and communicates with the mold inlet channel and cooperates with the mold block 32. The finishing mold 4 is equipped with multiple push plates 42 that are movably arranged to push the folded corner area of ​​the kraft paper 6 to the opening 41. In order to improve processing efficiency and processing accuracy and reduce the generation of defective kraft paper 6, before the mold block 32 presses the kraft paper 6 into the mold inlet channel, the finishing mold 4 tidies up the position and shape of the kraft paper 6 so that its folded corner area enters the edge-trimming station 13 correctly.

[0100] Specifically, the two push plates 42 of the tidying mold 4 push the paper 6 along the length and width directions of the paper 6, respectively. Correspondingly, the tidying mold 4 is provided with two fixed baffles 44. The two baffles 44 and the two push plates 42 surround the periphery of the paper 6, which serves to limit the position. Furthermore, both push plates 42 are driven by push plate drive cylinders 43.

[0101] Further, please refer to Figure 6 The mold 4 has a plurality of limiting rods 45 at the opening 41 along the extension direction of the mold inlet channel. The plurality of limiting rods 45 are distributed and spaced apart along the circumference of the mold inlet channel to help maintain the pre-bent shape of the greaseproof paper 6.

[0102] Furthermore, the base 1 is also provided with a feeding station 11, which is used to stack multiple sheets of greaseproof paper 6 in the vertical direction. The feeding station 11 is located on the side of the pre-forming station 12. The greaseproof paper forming device also includes a feeding mechanism located at the feeding station 11. The feeding mechanism includes a suction structure, which sucks up the greaseproof paper 6 in the vertical direction and has a movable stroke to enter the pre-forming station 12 from the side. The suction structure cooperates with the mold block 32 to put the greaseproof paper 6 into the pre-forming station 12.

[0103] To improve production output and efficiency, the paper forming device of this invention is equipped with an automatic feeding mechanism. Workers only need to stack multiple sheets of paper 6 on top of each other at the feeding station 11, which reduces the workload. Specifically, at the feeding station 11, there is a stacking bin extending vertically. The stacking bin is formed by limiting posts 27 and limiting plates 28 surrounding the base 1, which can hold multiple sheets of paper 6 at one time, and also facilitates observation and feeding.

[0104] Furthermore, the absorption structure includes an adsorption plate 23 and an adsorption driving cylinder 24. The adsorption driving cylinder 24 generates a negative pressure on the adsorption plate 23, thereby enabling it to adsorb. This method of obtaining greaseproof paper 6 by adsorption is highly reliable and ensures continuous and effective production.

[0105] The suction structure is installed on a slide rail 26. After suctioning the paper 6, it slides along the slide rail 26 to the pre-forming station 12. Then, the mold 4 and the suction structure are coordinated to place the paper 6 into the pre-forming station 12. Then, the suction structure returns along the slide rail 26 to continue suctioning the next piece of paper 6. Specifically, the suction drive cylinder 24 is connected to a slide block 25, which forms a sliding fit with the slide rail 26.

[0106] Furthermore, the suction structure is also equipped with a multi-sheet prevention device to prevent the suction plate 23 from adsorbing multiple sheets of greaseproof paper 6 and bringing them into the pre-forming station 12. There are already various embodiments of the multi-sheet prevention device, which will not be described in detail here.

[0107] Furthermore, the stacking direction is not limited, and multiple sheets of greaseproof paper 6 can be stacked in the front-to-back direction. The absorption structure can be adjusted adaptively.

[0108] Furthermore, the feeding mechanism also includes a feeding base 21 and multiple paper-picking rods 221. The feeding base 21 is located at the feeding station 11. Multiple sheets of tracing paper 6 are stacked vertically on the feeding base 21. The multiple paper-picking rods 221 are movably installed on the base 1. The multiple paper-picking rods 221 are horizontally arranged and spaced apart in sequence. The multiple paper-picking rods 221 have a travel distance from the adjacent side of the feeding base 21 to the bottom of the stacked tracing paper 6, and a travel distance vertically. The feeding base 21 is provided with multiple grooves 211 that cooperate with the multiple paper-picking rods 221. The multiple paper-picking rods 221 extend into the corresponding grooves 211 and move upward.

[0109] In this embodiment, the purpose of setting multiple paper-picking rods 221 is to continuously move the greaseproof paper 6 in the stacking bin to a position close to the suction structure, so that the suction structure can continuously and uninterruptedly absorb the greaseproof paper 6, and the production process can be carried out continuously. At the same time, multiple paper-picking rods 221 remove the greaseproof paper 6 at the loading station 11, so that the stacking bin has a larger space to place multiple sheets of greaseproof paper 6.

[0110] Please see Figure 11This is a driving device for multiple paper-picking rods 221. Specifically, one end of each paper-picking rod 221 is connected to a crossbar 222, which is connected to a rack 223. The rack 223 has a stroke in the same direction as the paper-picking rods 221. The rack 223 also meshes with a gear 224, which rotates clockwise and counterclockwise under the drive of a rotary drive cylinder 225, thereby driving the rack 223 to reciprocate. The rack 223 then drives the multiple paper-picking rods 221 to enter and exit the feeding bottom. In the groove 211 of the seat 21, the driving device has a simple structure, high precision and fast response. In this embodiment, the two ends of the crossbar 222 are also connected to two columns 226. The two columns 226 move up and down under the drive of a driving device, thereby driving the crossbar 222 to move up and down. The crossbar 222 then drives multiple paper picking rods 221 to move up and down. Of course, the crossbar 222 itself can also move up and down under the drive of a driving device to speed up the driving efficiency of multiple paper picking rods 221.

[0111] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made under the concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A method for forming tallow paper, characterized in that, Includes the following steps: The paper sheets are sequentially drawn from the loading station to the pre-forming station; Convey the greaseproof paper to the finishing mold, and align the folded corner area of ​​the greaseproof paper with the opening of the finishing mold, so that one side of the greaseproof paper corresponds to the mold inlet channel and the other side corresponds to the mold block; The mold block and kraft paper are pushed into the mold channel. The bottom wall of the mold block presses against the bottom surface of the kraft paper and the folded side wall corresponding to the height surface of the kraft paper, so that each fold line of the kraft paper faces the corresponding folded block, thus forming an initial kraft paper with a bottom surface and a height surface. The bottom wall of the mold block is horizontal, and the angle between the bottom wall and the folded side wall of the mold block is acute. The angle between the top wall and the folded side wall of the mold block is also acute. The angle between the inner wall surfaces of the notches of each folded block is greater than or equal to the angle between the bottom wall and the folded side wall of the mold block, and the angle between the top wall and the folded side wall, and does not exceed 90°. At the same time, the bottom surface and the height surface of the kraft paper are kept under pressure. Drive each corner block and make the notch of each corner block match the intersecting side edge of the top wall and corner side wall of the mold block, as well as the intersecting side edge of the bottom wall and corner side wall, so that the edge of the folded part of the shaped greaseproof paper is located between the notch of the corner block and the gap of the mold block, so as to form a shaped greaseproof paper with corners.

2. A butter paper forming device, characterized in that, include: A base, wherein the base is provided with a trimming station and a die-feeding channel, the trimming station being located at one end of the die-feeding channel, and the greaseproof paper being placed at the other end of the die-feeding channel; and, The edge-trimming mechanism includes a die-feeding structure and a bend structure movably disposed on the base. The die-feeding structure has a travel along the extension direction of the die-feeding channel, and the bend structure has a travel from the adjacent side of the die-feeding channel into the edge-trimming station. The mold feeding structure and the mold feeding channel cooperate to form a bottom surface and a height surface of the greaseproof paper in the mold feeding channel and reach the edge-cutting station. The folding structure is used to fold the height surface of the greaseproof paper into an angle. The mold structure includes a mold block having a movable stroke along the extension direction of the mold channel. The mold block has a bottom wall for pressing the bottom surface of the greaseproof paper and a folded side wall for corresponding to the height surface of the greaseproof paper. The edge-scraping mechanism also includes a base plate located at the edge-scraping station. The base plate cooperates with the bottom wall of the mold block to jointly define the bottom surface of the greaseproof paper. The angled structure includes a plurality of angled blocks movably disposed on the adjacent side of the mold inlet channel. The plurality of angled blocks have a movable stroke from the adjacent side of the mold inlet channel into the edge-scraping station, and each has a notch with its inner wall facing the mold block to press against the intersecting side edges of the top wall and the angled side wall of the mold block, as well as the intersecting side edges of the bottom wall and the angled side wall.

3. The paper forming apparatus as described in claim 2, characterized in that, The bottom wall of the mold block is horizontal, and the angle between the bottom wall and the corner side wall of the mold block is acute, as is the angle between the top wall and the corner side wall. The included angle of the inner wall surface of the notch of the plurality of corner blocks is greater than or equal to the included angle between the bottom wall and the corner side wall of the mold block, and the included angle between the top wall and the corner side wall, and does not exceed 90°; The plurality of corner blocks cooperate with the mold block, such that the inner edge of the notch of the plurality of corner blocks abuts against the edge of the bottom wall and the edge of the corner side wall of the mold block.

4. The butter paper forming apparatus as described in claim 3, characterized in that, The angle between the bottom wall and the corner sidewall of the mold block is in the range of 85°-89°; and / or, The angle between the top wall of the mold block and the corner side wall ranges from 85° to 89°; and / or, The included angle of the notches in the multiple corner blocks is all between 86° and 90°.

5. The paper forming apparatus as described in claim 3, characterized in that, The plurality of corner blocks include two upper corner blocks located on the left and right sides of the upper end of the mold block, and two lower corner blocks located on the left and right sides of the lower end of the mold block; The angled structure also includes: Two first angle linkages and two second angle linkages are used to drive the two upper angle blocks and the two lower angle blocks to move, respectively; and, A left mounting plate and a right mounting plate are respectively disposed on the left and right sides of the mold block. The two first angle connecting rods are movably disposed at the upper ends of the left mounting plate and the right mounting plate, and the two second angle connecting rods are movably disposed at the lower ends of the left mounting plate and the right mounting plate.

6. The paper forming apparatus as described in claim 5, characterized in that, The two first angle connecting rods are inclined downward toward one end of the mold block.

7. The paper forming apparatus as described in claim 2, characterized in that, The base is also provided with a pre-forming station, which is used to place the greaseproof paper to be processed. The pre-forming station and the edge-trimming station are located at both ends of the mold inlet channel, respectively. The paper forming device further includes a finishing mold located at the preforming station. The finishing mold has an opening that corresponds to and communicates with the mold inlet channel and cooperates with the mold block. The finishing mold has multiple push plates that are movably arranged to push the folded corner area of ​​the paper to the opening.

8. The paper forming apparatus as described in claim 7, characterized in that, The opening of the finishing mold is provided with a plurality of limiting rods arranged along the extension direction of the mold inlet channel. The plurality of limiting rods are distributed and spaced apart along the circumference of the mold inlet channel.

9. The butter paper forming apparatus as described in claim 7, characterized in that, The base is also provided with a feeding station, which is used to stack multiple sheets of greaseproof paper in the vertical direction. The feeding station is located at the preforming station. The paper forming device further includes a feeding mechanism located at the feeding station. The feeding mechanism includes a suction structure that sucks up the paper in the vertical direction and has a travel stroke that allows it to enter the pre-forming station from the side. The suction structure cooperates with the mold block to place the paper into the pre-forming station.

10. The butter paper forming apparatus as described in claim 9, characterized in that, The feeding mechanism also includes: A feeding base, located at the feeding station, on which multiple sheets of parchment paper are stacked vertically; and... Multiple paper-picking rods are movably installed on the base. The multiple paper-picking rods are horizontally arranged and spaced apart in sequence. The multiple paper-picking rods have a movable stroke from the adjacent side of the feeding base to the bottom of the stacked greaseproof paper, and a movable stroke in the vertical direction. The feeding base is provided with multiple grooves that cooperate with the multiple paper picking rods, and the multiple paper picking rods extend into the corresponding grooves and move upward.

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