Method for preventing round back of hardcover book from rounding

Abstract

Aiming at the technical problem that the book back of the hardcover book cannot well keep a round shape, the invention provides a method for preventing the round back of the hardcover book from rounding, which comprises the following steps: S1, preparing a rounding-preventing back adhesive which comprises fibers and bone glue in a weight ratio of 1: (2-5), and uniformly mixing the fibers and the bone glue; s2, printing and binding a book block, and rounding the book block to form a round back; s3, the round back of the book block obtained in the step S2 is brushed with anti-roundness back gum, gauze is pasted, then the round back of the book block is brushed with the anti-roundness back gum, and back paper is pasted; and S4, binding the book case to obtain the hardcover book. A certain amount of fibers are added into the bone glue, and low-temperature drying is carried out for a certain time, so that the book back can be well kept round.

Description

Technical Field

[0001] The invention relates to a method for making a hardcover book, in particular to a method for preventing the back of a hardcover book from becoming round again. Background Art

[0002] Hardcover books are books that are deeply loved by readers. Hardcover books are mainly composed of a book core and a book cover. The back of the book core is divided into square back and round back according to its shape. The so-called round back means that the back of the book core is rounded to form an arc surface with a certain curvature, also known as roundness.

[0003] Usually the production process of round-back hardcover books is as follows: the printed and folded book sheets are locked, glued (to prevent the book sheets from loosening), and the finished book core is cut with a three-sided knife. Then it is sent to the hardcover machine for rounding, spine removal, back glue, gauze, back glue, and back paper. Finally, the book cover and book core are matched and glued together to form a finished book (commonly known as three-gluing).

[0004] Bone glue is a widely used adhesive material in the printing industry. Its characteristics are: good adhesion, high strength, low moisture, fast drying, low price, easy to use, especially suitable for hardcover book production process, and can get good results. Normally, using bone glue as an adhesive, for round-back hardcover books with a thickness of less than 2 cm, according to the existing process, the book back can maintain its round shape well. However, when the thickness of the hardcover round-back book core increases to more than 3 cm, the shaping glue of the book back in the three-gluing process cools down, and after several flips, the arc of the book back becomes very small and loose, and cannot maintain the state of being fixed after being fixed, which affects the quality and appearance, and greatly reduces the satisfaction of customers and readers. Summary of the invention

[0005] The present invention aims at the technical problem that the back of a hardcover book cannot keep its round shape well, and provides a method for preventing the back of a hardcover book from returning to a round shape, comprising the following steps:

[0006] S1, preparing an anti-rounding adhesive, wherein the anti-rounding adhesive comprises fiber and bone glue, wherein the weight ratio of the fiber to the bone glue is 1:2-5, and the two are mixed evenly;

[0007] S2, printing and binding the book core, and rounding the book core to form a round back;

[0008] S3, brushing anti-rounding adhesive on the round back of the book block obtained in step S2, sticking gauze, brushing anti-rounding adhesive again, and sticking backing paper;

[0009] S4. Bind the book cover to obtain a hardcover book.

[0010] Furthermore, in step S2, the fiber is preferably one or two or more of polypropylene fiber, glass fiber, and staple fiber.

[0011] Furthermore, in step S2, the weight ratio of the fiber to the gelatin is 1:3-4.

[0012] More preferably, the method further comprises the following step: placing the book block obtained after step S3 into an oven at a temperature of 40 to 70° C. for drying for 0.2 to 1 hour.

[0013] In the present invention, a certain amount of fiber is added to commercially available bone glue, and low-temperature drying is performed for a certain period of time, so that the bone glue applied to the round back of a hardcover book can be quickly shaped, and the glue layer has good flexibility and toughness. Experiments show that even if a book core with a thickness greater than 90 mm is processed using the processing technology provided by the present invention, the arc of the book back can still remain the same after being turned over more than 5,000 times.

[0014] The method for preventing the back of a hardcover book from being rounded back provided by the invention has very good technical effects, and the process method is simple and easy to implement with low cost. DETAILED DESCRIPTION

[0015] How to implement the present invention is described in detail below.

[0016] Embodiment 1:

[0017] S1, preparing an anti-rounding adhesive, wherein the anti-rounding adhesive is uniformly mixed with staple fiber and bone glue in a weight ratio of 1:5;

[0018] S2, printing and binding the book core, the book core thickness is 30mm, and the book core is rounded to form a round back;

[0019] S3, brushing anti-rounding adhesive on the round back of the book block obtained in step S2, sticking gauze, brushing anti-rounding adhesive again, and sticking backing paper;

[0020] S4. Bind the book cover to obtain a hardcover book.

[0021] Embodiment 2:

[0022] S1, preparing an anti-rounding adhesive, wherein the anti-rounding adhesive is uniformly mixed with glass fiber and bone glue in a weight ratio of 1:2;

[0023] S2, printing and binding the book core, the book core thickness is 50mm, and the book core is rounded to form a round back;

[0024] S3, brushing anti-rounding adhesive on the round back of the book block obtained in step S2, sticking gauze, brushing anti-rounding adhesive again, and sticking backing paper;

[0025] S4. Bind the book cover to obtain a hardcover book.

[0026] Embodiment 3:

[0027] S1, preparing an anti-rounding adhesive, wherein the anti-rounding adhesive is uniformly mixed with polypropylene fiber and bone glue in a weight ratio of 1:3;

[0028] S2, printing and binding the book core, the book core thickness is 60mm, and the book core is rounded to form a round back;

[0029] S3, brushing anti-rounding adhesive on the round back of the book block obtained in step S2, sticking gauze, brushing anti-rounding adhesive again, and sticking backing paper;

[0030] S4. Bind the book cover to obtain a hardcover book.

[0031] Embodiment 4:

[0032] S1, preparing an anti-rounding adhesive, wherein the anti-rounding adhesive is uniformly mixed with polypropylene fiber, glass fiber and bone glue in a weight ratio of 1:1:5;

[0033] S2, printing and binding the book core, the book core thickness is 60mm, and the book core is rounded to form a round back;

[0034] S3, brushing anti-rounding adhesive on the round back of the book block obtained in step S2, sticking gauze, brushing anti-rounding adhesive again, and sticking backing paper;

[0035] S4. Bind the book cover to obtain a hardcover book.

[0036] Embodiment 5:

[0037] S1, preparing an anti-rounding adhesive, wherein the anti-rounding adhesive is uniformly mixed with polypropylene fiber and bone glue in a weight ratio of 1:4;

[0038] S2, printing and binding the book core, the book core thickness is 60mm, and the book core is rounded to form a round back;

[0039] S3, brushing anti-rounding adhesive on the round back of the book block obtained in step S2, sticking gauze, brushing anti-rounding adhesive again, and sticking backing paper;

[0040] S4. Bind the book cover to obtain a hardcover book.

[0041] Embodiment 6:

[0042] S1, preparing anti-rounding adhesive, wherein the anti-rounding adhesive is uniformly mixed with short silk and bone glue in a weight ratio of 1:3;

[0043] S2, printing and binding the book core, the book core thickness is 90mm, and the book core is rounded to form a round back;

[0044] S3, brushing anti-rounding adhesive on the round back of the book block obtained in step S2, sticking gauze, brushing anti-rounding adhesive again, and sticking backing paper;

[0045] S4, send it into an oven at a temperature of 40°C for drying for 0.2 hours;

[0046] S5. Bind the book cover to obtain a hardcover book.

[0047] Embodiment 7:

[0048] S1. Prepare anti-rounding adhesive, wherein the anti-rounding adhesive is composed of polypropylene fiber and bone glue in a weight ratio of 1:3, and add appropriate amount of water and mix well;

[0049] S2, printing and binding the book core, the book core thickness is 100mm, and the book core is rounded to form a round back;

[0050] S3, brushing anti-rounding adhesive on the round back of the book block obtained in step S2, sticking gauze, brushing anti-rounding adhesive again, and sticking backing paper;

[0051] S4, send it into an oven at a temperature of 70°C and dry it for 1 hour;

[0052] S5. Bind the book cover to obtain a hardcover book.

[0053] In Examples 6 and 7, appropriate drying temperatures such as 50° C., 55° C., etc. and drying times such as 0.5 hours, etc. can be selected based on factors such as book core thickness, moisture content of anti-rounding adhesive, thickness of anti-rounding adhesive applied on the book back, etc.

[0054] In the above embodiment, when making the anti-rounding adhesive, since the water content of bone glue is relatively small, when the amount of added fiber is large, a small amount of water can be added to facilitate stirring and mixing evenly, and to ensure that the anti-rounding adhesive has appropriate fluidity for use in the subsequent gluing process.

[0055] The above specific embodiments are only for the convenience of describing how to implement the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. Without departing from the purpose and technical concept of the present invention, the present invention may have different changes and improvements, and these changes and improvements all fall within the protection scope of the present invention.

Claims

1. A method for preventing a hardcover book from being rounded back, characterized in that: The steps include: S1, preparing an anti-rounding adhesive, wherein the anti-rounding adhesive comprises fiber and bone glue, wherein the weight ratio of the fiber to the bone glue is 1:2-5, and the two are mixed evenly; S2, printing and binding the book core, and rounding the book core to form a round back; S3, brushing anti-rounding adhesive on the round back of the book block obtained in step S2, sticking gauze, brushing anti-rounding adhesive again, and sticking backing paper; S4. Bind the book cover to obtain a hardcover book.

2. The method for preventing the back of a hardcover book from being rounded back according to claim 1, characterized in that: The fiber is one or two or more of polypropylene fiber, glass fiber and staple fiber.

3. The method for preventing the back of a hardcover book from being rounded back according to claim 1 or 2, characterized in that: The weight ratio of the fiber to the gelatin is 1:3-4.

4. The method for preventing the back of a hardcover book from being rounded back according to claim 1 or 2, characterized in that: The method further comprises the following step: sending the book block obtained after step S3 into an oven at a temperature of 40 to 70° C. to dry it for 0.2 to 1 hour.

5. The method for preventing the back of a hardcover book from being rounded back according to claim 3, characterized in that: The method further comprises the following step: sending the book block obtained after step S3 into an oven at a temperature of 40 to 70° C. to dry it for 0.2 to 1 hour.