A method for producing a perfect bound book

Abstract

The application discloses a non-wire sewing fine binding book production method and relates to the technical field of fine binding book production. The non-wire sewing fine binding book production method comprises the following steps: S1, book core manufacturing: a, printing: printing images and texts on large-format paper; b, folding: folding the printed large-format printed matter into uniform sheets according to page order and format specifications through a folding machine. Through the quantitative glue arranging structure formed by the mutual engagement of the glue feeding part and the glue arranging part, the glue solution is quantitatively and continuously transferred to the inner surface of the immersion glue coating assembly in a gear pump extrusion mode, so that the problems of difficult control of the glue dipping amount and easy overflow in the glue roller dipping mode are avoided, and the problems of glue liquid splashing and waste in the glue spraying mode are also avoided.

Description

Technical Field

[0001] This invention relates to the field of hardcover book production technology, specifically a method for producing unbound hardcover books. Background Technology

[0002] Hardcover books are one of the most common bookbinding formats on the market. Their production process typically includes major steps such as book block making, book block cover mounting, and finished product finalization and inspection. Book block making includes sub-steps such as printing, folding, collating, spine milling, and gluing. The gluing process involves evenly applying hot melt adhesive or other glue to the surface of the book block and spine to ensure a firm bond in subsequent processes such as gauze pasting and cover mounting. Therefore, the uniformity of the gluing on the spine directly determines the bonding quality and appearance of the finished hardcover book.

[0003] Chinese patent CN105730044A discloses a gluing device specifically for the spine of hardcover books. The device includes a support frame with a rotating axle. A disc is coaxially mounted on the end of the axle away from its rotatable connection to the support. A velvet layer is wrapped around the periphery of both discs. A hollow gluing roller is located within the velvet layer. A glue inlet channel is provided at the center of the axle, connecting to the disc. Delivery pipes, communicating with the internal cavity of the gluing roller, are rotatably mounted on both sides of the roller. These delivery pipes extend outward through the glue inlet channel and are equipped with one-way valves. Several glue outlets communicating with the cavity are opened on the side wall of the gluing roller. During operation, glue enters the internal cavity of the gluing roller through the delivery pipes and seeps out from the glue outlets to the inner surface of the velvet layer. Through the rolling and squeezing action of the gluing roller within the velvet layer and the inherent permeability of the velvet layer, the glue permeates to the outer surface of the velvet layer, thus applying glue to the spine of the book.

[0004] However, the above-mentioned existing technologies still have shortcomings: the adhesive is naturally seeped out from the inside of the glue roller through the glue outlet, and mainly relies on its own gravity to accumulate and penetrate inside the fleece layer. The amount of adhesive output lacks an active and controllable quantitative transfer mechanism. Changes in adhesive viscosity and ambient temperature will cause fluctuations in the amount of seepage and penetration rate. When the device operates continuously for a long time, it is easy to have excessive local adhesive, resulting in glue splashing, or insufficient local adhesive, resulting in glue shortage. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a method for producing hardcover books without sewing threads, which solves the problem of uneven glue application caused by glue splashing.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a method for producing a threadless hardcover book, comprising the following steps: S1, book block production: a. Printing: printing the text and images on large-format paper; b. Folding: folding the printed large-format sheets into uniform sections according to page number order and book size using a folding machine; c. Aligning: collecting and arranging all the folded sections according to the correct page number order to form a complete book block blank; d. Spine milling: milling the spine edges of the aligned book block with the spine facing down using a high-speed rotating milling cutter, and then roughening or cutting out several small grooves; e. Gluing: applying hot melt adhesive to the milled and grooved spine using a gluing device. S2. Book Block Cover: f. Applying Spine Paper: While the glue is still wet, attach a strip of special gauze and spine paper to the spine of the book block after the glue has been applied; g. Covering: Combine the finished hardcover book cover with the processed book block, apply glue to the front and back endpapers (blank pages before and after the title page), and then align and glue them to the cardboard of the book cover; h. Rounding: Use a special mold to press the spine of the book with the cover into an arc shape; i. Grooving: Use a heated metal strip to crease the edges of the cover and back cover near the spine; S3. Finished product finalization inspection; The gluing device in the S1 book block production includes a glue box and a turntable rotatably connected to both sides inside the glue box. It also includes: an impregnation and gluing assembly, which is cylindrical and has its two ends fixed to the two turntables respectively, rotating synchronously with the turntables; and a quantitative glue dispensing assembly, which is located inside the impregnation and gluing assembly. The quantitative glue dispensing assembly includes a glue inlet fixed relative to the glue box and a glue dispensing part that rotates freely inside the impregnation and gluing assembly. The glue dispensing part and the glue inlet interact to quantitatively transfer the glue liquid to the inner surface of the impregnation and gluing assembly. The impregnation and gluing assembly rotates, and centrifugal force is used to make the glue liquid evenly penetrate from the inside to the outside to its outer surface for gluing the spine of the book block.

[0007] Furthermore, the glue discharge section includes: an end plate, rotatably connected to the inner side of the turntable; and an annular toothed ring, which is formed by multiple extrusion strips arranged circumferentially and fixed between two sets of end plates, with the gap between adjacent extrusion strips forming a glue leakage channel. The glue inlet includes: an inner cylinder, which is fixedly connected to the glue box and rotatably connected to the turntable and the end plate; an inclined hopper is provided on one side of the inner cylinder, and a circular cavity is provided at the lower end of the inclined hopper; and a toothed receiving roller, which is rotatably connected to the circular cavity. The toothed receiving roller has its toothed grooves forming a sealed glue-holding cavity with the inner wall of the circular cavity, and the toothed receiving roller meshes with the annular toothed ring to squeeze the glue in the glue-holding cavity and discharge it through the glue leakage channel.

[0008] Furthermore, the impregnation and coating assembly includes a reinforcing layer fixed between two sets of turntables, an inner adsorption layer that does not contact the extrusion strip is provided on the inner side of the reinforcing layer, and an outer coating layer is provided on the outer side of the reinforcing layer; When the adhesive flows through the adhesive leakage channel to the surface of the inner adsorption layer, the centrifugal force generated by the rotation of the inner adsorption layer and the wetting effect of the adhesive on the velvet cloth cause the adhesive on the inner surface of the inner adsorption layer to penetrate evenly into the outer coating layer.

[0009] Furthermore, the inner wall of the circular cavity is provided with a flexible sealing gasket, the tooth tips on the toothed receiving roller contact and cooperate with the flexible sealing gasket, and the line connecting the toothed receiving roller and the inner cylinder axis has an angle with the horizontal plane to stabilize the glue delivery effect.

[0010] Furthermore, a first driven wheel that is rotatably connected to the plastic box is fixed to the outer side of one of the turntables. The first driven wheel has a cavity inside. A first motor is installed at the lower end of the outer side of the plastic box. A first driving wheel is fixed to the output end of the first motor. A first transmission belt is provided between the first driving wheel and the first driven wheel.

[0011] Furthermore, an annular groove is provided on the inner side of the turntable, and an internal gear ring extending into the annular groove is fixed on the outer side of the end plate. A connecting shaft is rotatably connected to the annular groove. A small gear that meshes with the internal gear ring is installed at one end of the connecting shaft, and the other end of the connecting shaft extends into the first driven wheel and is fixed with a second driven wheel. A fixing frame is fixed to the outside of the plastic box. A second motor is installed on the fixing frame. The output end of the second motor extends into the first driven wheel and a second driving wheel is installed thereon. A second transmission belt is provided between the second driving wheel and the second driven wheel.

[0012] Furthermore, the inner cylinder is provided with an electric heating rod that is fixedly connected to the turntable. The outer side of the electric heating rod is provided with heat-conducting fins in a radial pattern, and the electric heating rod is rotatably connected to the inner cylinder and the end plate.

[0013] Furthermore, the reinforcing layer has a cylindrical mesh or porous structure, and both the inner adsorption layer and the outer coating layer are made of velvet material.

[0014] Furthermore, the gluing device also includes a first conveying mechanism for conveying the book block and a second conveying mechanism disposed above the glue box, wherein the outer surface of the immersion glue application assembly contacts the spine of the book block conveyed by the second conveying mechanism.

[0015] Furthermore, the glue box has an inclined surface inside, and a glue discharge pipe is installed at the bottom of the inclined surface. A glue inlet pipe is provided at one end of the inner cylinder, and a screw conveyor is fixedly connected to one end of the heating rod inside the glue inlet pipe.

[0016] The present invention has the following beneficial effects: (1) The production method of the unlocked hardcover book uses a quantitative glue discharge structure formed by the interlocking of the glue inlet and glue outlet to quantitatively and continuously transfer the glue liquid to the inner surface of the glue-wetting component in a manner similar to the squeezing of a gear pump. This avoids the problem of difficult control of glue amount and easy overflow in the glue roller glue-dip method, and also avoids the problem of glue splashing and waste in the glue spraying method.

[0017] (2) In the production method of the unlocked hardcover book, the impregnation and coating component adopts a structure combining an inner adsorption layer and an outer coating layer. After the glue is discharged through the glue discharge section, it first penetrates into the inner adsorption layer. Then, with the help of the centrifugal force generated by the rotation of the impregnation and coating component and the wetting effect of the velvet material, it penetrates evenly from the inside to the outside to the outer coating layer, so that the coating thickness of each part of the outer surface of the impregnation and coating component tends to be consistent, thereby ensuring the uniformity of the spine coating.

[0018] (3) The production method of the unlocked hardcover book uses an electric heating rod to heat the glue liquid entering the inner cylinder, and uses a screw conveyor to achieve continuous delivery and heat preservation of the glue liquid, so as to ensure that the glue liquid is always in a suitable viscosity and flow state throughout the glue application process, and avoids the glue effect being affected by the glue liquid cooling and clumping. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the process flow of the present invention; Figure 2 This is a schematic diagram of the adhesive application device in this invention; Figure 3 In this invention Figure 2 Another perspective view; Figure 4 This is a schematic diagram of the internal structure of the glue box in this invention; Figure 5 This is a schematic diagram of the driving structure of the glue discharge section in this invention; Figure 6 This is a schematic diagram of the internal gear ring and pinion transmission structure in this invention; Figure 7 This is a schematic diagram of the mounting structure of the glue inlet in this invention; Figure 8 This is a schematic diagram of the structure when the glue discharge section and the glue inlet section interact in this invention; Figure 9 This is a schematic diagram of the internal structure of the glue inlet section in this invention; Figure 10 This is a perspective view of the overall structure of the gluing device, together with the first conveying mechanism and the second conveying mechanism in this invention. Figure 11 This is a schematic diagram of the structure of the book block in this invention when it is transported by the first conveying mechanism and the second conveying mechanism and comes into contact with the glue-applying component for gluing.

[0020] In the diagram, 1. Glue box; 2. First conveying mechanism; 3. Second conveying mechanism; 4. Fixing frame; 5. Turntable; 6. Glue inlet pipe; 7. First driven wheel; 8. First motor; 9. First driving wheel; 10. First transmission belt; 11. Second motor; 12. Outer coating layer; 13. Second driving wheel; 14. Connecting shaft; 15. Second driven wheel; 16. Second transmission belt; 17. Pinion; 18. End plate; 19. Internal gear ring; 20. Extrusion strip; 21. Glue leakage channel; 22. Inner adsorption layer; 23. Reinforcing layer; 24. Inner cylinder; 25. Inclined hopper; 26. Circular cavity; 27. Toothed receiving roller; 28. Heating rod; 29. ​​Heat-conducting fins; 30. Screw conveyor; 31. Annular groove. Detailed Implementation

[0021] The following is based on Figure 1 - Figure 11 This invention describes a method for producing unsewn hardcover books according to embodiments of the present invention.

[0022] Please see Figure 1 - Figure 11 This invention provides a technical solution: a method for producing a hardcover book without sewn binding, comprising the following steps: S1, book block production: a. Printing: printing images and text on large-format paper; b. Folding: folding the printed large-format sheets into uniform sections according to page number order and book size using a folding machine; c. Aligning: collecting and aligning all folded sections according to the correct page number order to form a complete book block blank; d. Spine milling: milling the spine edges of the aligned book block with the spine facing down using a high-speed rotating milling cutter, and then roughening or cutting out several small grooves; e. Gluing: applying hot melt adhesive to the milled and grooved spine using a gluing device.

[0023] S2. Book Block Cover Assembly: Combining the hardcover book cover with the processed book block; it should be noted that this step specifically includes the following: f. Applying Spine Paper: While the glue is still wet, attach a strip of special gauze and spine paper to the spine of the book block after applying glue; g. Cover Assembly: Combining the finished hardcover book cover with the processed book block, applying glue to the front and back endpapers (blank pages before and after the title page), and then aligning and gluing them with the cardboard of the book cover; h. Rounding: Using a special mold, pressing the spine of the book with the cover into an arc shape; i. Grooving: Using a heated metal strip to crease the edges of the cover and back cover near the spine.

[0024] S3. Finished product shaping and inspection, mainly including flattening and shaping, three-sided trimming (trimming the rough edges of the top, bottom, and bottom edges of the book block), cleaning inspection, quality inspection, and finally packaging.

[0025] like Figure 2 - Figure 11As shown, the gluing device used in the gluing step of S1 book block production includes a glue box 1 and a turntable 5 rotatably connected to both sides inside the glue box 1. A cylindrical impregnation and gluing component is provided between the two turntables 5. The two ends of the impregnation and gluing component are fixed on the two turntables 5 respectively and rotate synchronously with the turntables 5.

[0026] Inside the wetting and coating assembly is a metering dispensing assembly, which includes a glue inlet fixed relative to the glue box 1 and a dispensing part that rotates freely within the wetting and coating assembly. The dispensing part and the glue inlet engage and interact with each other to achieve metered transfer of the glue liquid.

[0027] The glue discharge section and the glue inlet section interact to quantitatively transfer the glue liquid to the inner surface of the glue-wetting assembly. The glue-wetting assembly rotates and uses centrifugal force to make the glue liquid evenly penetrate from the inside to the outside surface for applying glue to the book block and spine.

[0028] like Figure 7 - Figure 9 As shown, the glue discharge section provided in this embodiment includes an annular toothed ring. The end plate 18 is rotatably connected to the inner side of the turntable 5. The annular toothed ring is composed of multiple extrusion strips 20 arranged circumferentially and fixed between two sets of end plates 18. The gap between adjacent extrusion strips 20 forms a glue leakage channel 21. The glue inlet section includes an inner cylinder 24 and a toothed receiving roller 27. The inner cylinder 24 is fixedly connected to the glue box 1 and is rotatably connected to the turntable 5 and the end plate 18. That is, the inner cylinder 24 itself is fixed and does not rotate, while the turntable 5 and the end plate 18 can rotate around the inner cylinder 24. An inclined bucket 25 is provided on one side of the inner cylinder 24. A circular cavity 26 is provided at the lower end of the inclined bucket 25. The toothed receiving roller 27 is rotatably connected in the circular cavity 26.

[0029] In this design, the toothed grooves of the toothed receiving roller 27 form a sealed glue-holding cavity with the inner wall of the circular cavity 26. The toothed receiving roller 27 meshes with the annular toothed ring. When the glue is introduced from the inner cylinder 24 into the circular cavity 26 via the inclined bucket 25, it is contained within the glue-holding cavity formed by the toothed grooves of the toothed receiving roller 27 and the inner wall of the circular cavity 26. Since the inner cylinder 24 is fixed, the glue-discharging part (end plate 18 and its annular toothed ring) can rotate relative to the inner cylinder 24. The annular toothed ring meshes with the toothed receiving roller 27, driving the toothed receiving roller 27 to rotate around its own axis, much like a gear pump. The transmission principle is generally as follows: a fixed amount of adhesive liquid contained in the adhesive chamber is squeezed and transported along the inner wall of the circular cavity 26, and squeezed out through the adhesive leakage channel 21 formed between adjacent extrusion strips 20 at the meshing point, thereby transferring the adhesive liquid quantitatively and continuously from the adhesive inlet to the inner surface of the inner adsorption layer 22 of the adhesive coating component. This gear pump-type quantitative extrusion structure can more accurately control the amount of adhesive discharged per unit time, avoiding excessive or insufficient supply of adhesive liquid. The control of the amount of adhesive discharged per unit time is mainly achieved by controlling the rotation speed of the end plate 18 and the annular gear ring on it.

[0030] It should be noted in this embodiment that since the adhesive is introduced from the inner cylinder 24 into the circular cavity 26 through the inclined bucket 25, it is transported from the inside to the outside, rather than being taken from the adhesive box 1 in the traditional sense. Therefore, the adhesive box 1 can be used as a collection device for excess adhesive. The wetting and coating components do not need to come into contact with the adhesive in the adhesive box 1. Therefore, it will not cause disturbance to the inside of the adhesive box 1, thus preventing the adhesive from splashing inside the adhesive box 1.

[0031] like Figure 6 - Figure 8 As shown, the impregnation and coating assembly provided in this embodiment includes a reinforcing layer 23 fixed between two sets of turntables 5. The inner side of the reinforcing layer 23 is provided with an inner adsorption layer 22 that does not contact the extrusion strip 20. The inner adsorption layer 22 does not contact the extrusion strip 20 mainly to avoid mutual friction during rotation. The outer side of the reinforcing layer 23 is provided with an outer coating layer 12. In specific use, when the glue flows to the surface of the inner adsorption layer 22 through the glue leakage channel 21 of the glue discharge part, on the one hand, the centrifugal force generated by the high-speed rotation of the impregnation and coating assembly is used, and on the other hand, the glue itself is used for wetting and diffusion on the velvet material, so that the glue adhering to the inner surface of the inner adsorption layer 22 is uniformly penetrated radially from the inside to the outside, and finally evenly distributed to the entire outer surface of the outer coating layer 12. The outer surface of the outer coating layer 12 comes into contact with the spine of the book during rotation, thereby achieving uniform glue application to the spine and avoiding the problems of uneven glue application, glue overflow or splashing caused by traditional glue roller dipping or spraying methods.

[0032] like Figure 7 and Figure 8 As shown, to further improve the stability of adhesive conveying, a flexible sealing gasket is provided on the inner wall of the circular cavity 26. The toothed tops of the toothed receiving roller 27 contact and cooperate with the flexible sealing gasket to improve the sealing effect of the adhesive cavity and reduce adhesive backflow or leakage. In addition, the line connecting the axis of the toothed receiving roller 27 and the inner cylinder 24 has a certain angle with the horizontal plane. By utilizing this tilt angle and combined with the effect of gravity, the adhesive can be more smoothly introduced into the circular cavity 26 from the inclined bucket 25, and the adhesive can be prevented from flowing out of the adhesive cavity in advance due to gravity, thus stabilizing the adhesive conveying effect.

[0033] like Figure 2 - Figure 6 As shown, in order to achieve the overall rotation of the impregnation and coating assembly, a first driven wheel 7 is fixed to the outside of one of the turntables 5 provided in this embodiment and is rotatably connected to the glue box 1. The first driven wheel 7 has a cavity inside. A first motor 8 is installed at the lower end of the outside of the glue box 1. A first driving wheel 9 is fixed to the output end of the first motor 8. A first transmission belt 10 is provided between the first driving wheel 9 and the first driven wheel 7. After the first motor 8 is started, it drives the turntable 5 to rotate through the first driving wheel 9, the first transmission belt 10, and the first driven wheel 7, thereby driving the impregnation and coating assembly fixedly connected to the turntable 5 to rotate at high speed, providing power for the subsequent centrifugal penetration coating of the glue.

[0034] like Figure 2 - Figure 6 As shown, an annular groove 31 is provided on the inner side of the turntable 5. An internal gear ring 19 extending to the annular groove 31 is fixed on the outer side of the end plate 18. A connecting shaft 14 is rotatably connected to the annular groove 31. A small gear 17 that meshes with the internal gear ring 19 is installed at one end of the connecting shaft 14, and the other end of the connecting shaft 14 extends into the first driven wheel 7 and is fixed with a second driven wheel 15. A fixing frame 4 is fixed on the outer side of the plastic box 1. A second motor 11 is installed on the fixing frame 4. The output end of the second motor 11 extends into the first driven wheel 7 and is installed with a second driving wheel 13. A second transmission belt 16 is provided between the second driving wheel 13 and the second driven wheel 15.

[0035] After the second motor 11 starts, it drives the second driven wheel 15 to rotate via the second driving wheel 13 and the second transmission belt 16. In turn, it drives the pinion 17 to rotate via the connecting shaft 14. The pinion 17 meshes with the internal gear ring 19 fixed on the outside of the end plate 18, thereby driving the end plate 18 (i.e., the glue discharge section) to rotate around the inner cylinder 24. The first motor 8 and the second motor 11 independently drive the impregnation and coating assembly (via the turntable 5) and the glue discharge section (via the end plate 18) to rotate. The speeds of the two can be adjusted separately, thereby forming a controllable relative speed difference between the impregnation and coating assembly and the glue discharge section. This relative speed difference is the power source for driving the toothed receiving roller 27 to mesh and rotate with the ring gear ring to achieve quantitative glue discharge. By adjusting the speeds of the first motor 8 and the second motor 11 respectively, the rotational glue application speed of the impregnation and coating assembly and the quantitative glue discharge rate of the glue discharge section can be independently controlled to adapt to the production needs of different specifications of book blocks and different viscosities of glue.

[0036] like Figure 6 - Figure 9 As shown, an electric heating rod 28 is fixedly connected to the turntable 5 inside the inner cylinder 24. The outer side of the electric heating rod 28 is provided with radially arranged heat-conducting fins 29. The electric heating rod 28 is rotatably connected to the inner cylinder 24 and the end plate 18, that is, the electric heating rod 28 rotates synchronously with the turntable 5. The heat generated by the electric heating rod 28 is diffused and conducted to the surrounding adhesive through the heat-conducting fins 29, continuously heating the adhesive and keeping the hot melt adhesive in a suitable molten flow state. This prevents the adhesive from clumping and blocking the conveying channel due to temperature drop. The synchronous rotation of the electric heating rod 28 with the turntable 5 can also cause the heat-conducting fins 29 to agitate the adhesive in the inner cylinder 24. Since this agitation is inside the inner cylinder 24, it is relatively sealed and will not cause adhesive splashing, thereby improving the fluidity of the adhesive and preventing blockage.

[0037] like Figure 6 - Figure 8As shown, in order to improve the structural strength and coating effect of the impregnation and coating assembly, the reinforcing layer 23 provided in this embodiment is a cylindrical mesh or porous structure, which provides structural support for the entire impregnation and coating assembly and allows the adhesive to penetrate. The inner adsorption layer 22 and the outer coating layer 12 are both made of velvet material. The velvet material has good adsorption and wettability, which facilitates the uniform penetration and diffusion of the adhesive.

[0038] like Figure 10 and Figure 11 As shown, in order to achieve continuous gluing of hardcover books, the glue box 1 provided in this embodiment is provided with a first conveying mechanism 2 for conveying the book block on one side. The first conveying mechanism 2 and the second conveying mechanism 3 extend along the book block conveying direction. The book block is suspended vertically and is conveyed to the second conveying mechanism 3 by the first conveying mechanism 2. When the book block passes over the glue box 1, the spine of the book block is facing down and comes into contact with the outer surface of the glue-applying assembly, so as to achieve continuous and uniform glue application to the spine during the continuous movement of the book block.

[0039] like Figure 4 and Figure 9 As shown, to facilitate the handling of adhesive liquid inside the adhesive box 1, the adhesive box 1 provided in this embodiment has an inclined surface inside, and the bottom of the adhesive box 1 is located at the bottom of the inclined surface and a discharge pipe is installed. To facilitate the input of adhesive liquid, the inner cylinder 24 provided in this embodiment has an inlet pipe 6 at one end. The inlet pipe 6 has a screw conveyor 30 fixedly connected to one end of the heating rod 28. After the external adhesive liquid enters through the inlet pipe 6, the screw conveyor 30, which rotates synchronously with the heating rod 28, continuously pushes the adhesive liquid axially to the inclined bucket 25 and the circular cavity 26, so that the toothed receiving roller 27 can mesh with the annular toothed ring to extrude the adhesive liquid, thereby realizing a continuous and stable supply of adhesive liquid from the inlet to the quantitative discharge.

[0040] During use (operation), the adhesive enters the inner cylinder 24 through the adhesive inlet pipe 6, is conveyed axially by the screw conveyor 30, and is continuously heated and kept warm by the electric heating rod 28 and the heat-conducting fins 29, and is further introduced into the circular cavity 26 through the inclined bucket 25.

[0041] The first driving wheel 9, the first transmission belt 10, and the first driven wheel 7 drive the turntable 5 to rotate, which in turn drives the entire impregnation and coating assembly fixedly connected to the turntable 5 to rotate. The second driving wheel 13 and the second transmission belt 16 drive the second driven wheel 15 to rotate, which in turn drives the pinion 17 to rotate through the connecting shaft 14. The pinion 17 meshes with the internal gear ring 19 fixed on the outside of the end plate 18, thereby driving the end plate 18 (i.e., the glue discharge part) to rotate around the inner cylinder 24. The difference in speed between the two causes the toothed receiving roller 27 to mesh with the ring gear ring and rotate, squeezing the metered glue liquid in the glue holding cavity on the toothed receiving roller 27 through the glue leakage channel 21 to the inner surface of the inner adsorption layer 22. The centrifugal force generated by the high-speed rotation of the impregnation and coating assembly with the turntable 5, combined with the impregnation and diffusion effect of the velvet material, allows the glue liquid to permeate evenly from the inner adsorption layer 22 to the outer surface of the outer coating layer 12.

[0042] The second conveying mechanism 3 transports the milled spine-grooved book block with the spine facing down through the outer surface of the glue-coating assembly. The spine comes into contact with the outer coating layer 12, which is uniformly coated with glue, thereby completing the quantitative and uniform glue coating of the book block and spine.

Claims

1. A method for producing unsewn hardcover books, characterized in that, Includes the following steps: S1. Book Block Production: a. Printing: Printing images and text onto large-format paper; b. Folding: The printed large-format sheets are folded into uniform sheets according to the page number order and format using a folding machine; c. Page arrangement: Collect and arrange all the folded book pages in the correct page number order to form a complete book block blank; d. Milling the spine: With the prepared book block spine facing down, use a high-speed rotating milling cutter to mill the spine edges flat, and then roughen or cut out several small grooves; e. Applying glue: Apply hot melt glue to the spine after milling and slotting; S2, Book Block Cover: Combining the hardcover book cover with the processed book block; S3. Finished product finalization inspection; The gluing device used in the production of the S1 book block includes a glue box (1) and a turntable (5) rotatably connected to both sides inside the glue box (1), and also includes: The impregnation and coating assembly is cylindrical, with its two ends fixed to the two turntables (5) respectively, and rotates synchronously with the turntables (5); A quantitative dispensing component is disposed inside the impregnation and coating component. The quantitative dispensing component includes a glue inlet fixed relative to the glue box (1) and a dispensing component that rotates freely within the impregnation and coating component. The glue discharge section and the glue inlet section interact to quantitatively transfer the glue liquid to the inner surface of the wetting and coating component. The wetting and coating component rotates, and centrifugal force is used to make the glue liquid evenly penetrate from the inside to the outside surface for applying glue to the book block and spine.

2. The method for producing a hardcover book without sewing as described in claim 1, characterized in that, The glue discharge section includes: End plate (18) is rotatably connected to the inside of turntable (5); The annular toothed ring is formed by fixing multiple extrusion strips (20) spaced apart in the circumferential direction between two sets of end plates (18), and the gap between adjacent extrusion strips (20) forms a glue leakage channel (21). The glue inlet includes: The inner cylinder (24) is fixedly connected to the plastic box (1) and is rotatably connected to the turntable (5) and the end plate (18). The inner cylinder (24) has an inclined bucket (25) on one side and a circular cavity (26) at the lower end of the inclined bucket (25). The toothed receiving roller (27) is rotatably connected to the circular cavity (26); The toothed receiving roller (27) forms a sealed glue-holding cavity with the inner wall of the circular cavity (26), and the toothed receiving roller (27) meshes with the annular toothed ring to squeeze the glue in the glue-holding cavity and discharge it through the glue leakage channel (21).

3. The method for producing a hardcover book without sewing as described in claim 2, characterized in that, The impregnation and coating assembly includes a reinforcing layer (23) fixed between two sets of turntables (5), the inner side of the reinforcing layer (23) is provided with an inner adsorption layer (22) that does not contact the extrusion strip (20), and the outer side of the reinforcing layer (23) is provided with an outer coating layer (12). When the adhesive flows through the adhesive leakage channel (21) to the surface of the inner adsorption layer (22), the centrifugal force generated by the rotation of the inner adsorption layer (22) and the wetting effect of the adhesive on the velvet cloth make the adhesive on the inner surface of the inner adsorption layer (22) evenly penetrate to the outer coating layer (12).

4. The method for producing a hardcover book without sewing as described in claim 3, characterized in that, The inner wall of the circular cavity (26) is provided with a flexible sealing gasket. The toothed top of the toothed receiving roller (27) contacts and cooperates with the flexible sealing gasket. The line connecting the axis of the toothed receiving roller (27) and the inner cylinder (24) has an angle with the horizontal plane to stabilize the glue delivery effect.

5. The method for producing a hardcover book without sewing as described in claim 4, characterized in that, One of the turntables (5) has a first driven wheel (7) fixed on its outer side and rotatably connected to the plastic box (1). The first driven wheel (7) has a cavity inside. A first motor (8) is installed at the lower outer side of the plastic box (1). A first driving wheel (9) is fixed at the output end of the first motor (8). A first transmission belt (10) is provided between the first driving wheel (9) and the first driven wheel (7).

6. The method for producing a hardcover book without sewing as described in claim 5, characterized in that, The turntable (5) has an annular groove (31) on its inner side. An internal gear ring (19) extending to the annular groove (31) is fixed on the outer side of the end plate (18). A connecting shaft (14) is rotatably connected to the annular groove (31). A small gear (17) meshing with the internal gear ring (19) is installed at one end of the connecting shaft (14), and the other end of the connecting shaft (14) extends into the first driven wheel (7) and is fixed with a second driven wheel (15). A fixing frame (4) is fixed on the outside of the plastic box (1). A second motor (11) is installed on the fixing frame (4). The output end of the second motor (11) extends into the first driven wheel (7) and a second driving wheel (13) is installed thereon. A second transmission belt (16) is provided between the second driving wheel (13) and the second driven wheel (15).

7. A method for producing a hardcover book without sewing as described in claim 6, characterized in that, The inner cylinder (24) is provided with an electric heating rod (28) fixedly connected to the turntable (5). The outer side of the electric heating rod (28) is provided with heat-conducting fins (29) in a radial pattern. The electric heating rod (28) is rotatably connected to the inner cylinder (24) and the end plate (18).

8. A method for producing a hardcover book without sewing according to any one of claims 3-7, characterized in that, The reinforcing layer (23) is a cylindrical mesh or porous structure, and the inner adsorption layer (22) and the outer coating layer (12) are both made of velvet.

9. A method for producing a hardcover book without sewing as described in claim 8, characterized in that, The gluing device further includes a first conveying mechanism (2) for conveying the book block and a second conveying mechanism (3) located above the glue box (1), wherein the outer surface of the immersion gluing assembly contacts the spine of the book block conveyed by the second conveying mechanism (3).

10. A method for producing a hardcover book without sewing as described in claim 9, characterized in that, The glue box (1) has an inclined surface inside, and the bottom of the glue box (1) is located at the bottom of the inclined surface and a glue discharge pipe is installed. One end of the inner cylinder (24) is provided with a glue inlet pipe (6), and a spiral feeder (30) is fixedly connected to one end of the heating rod (28) inside the glue inlet pipe (6).

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