Method for hotly rounding middle back of outer shell of round back photo album

Abstract

The invention discloses a method for hotly rounding the middle back of an outer shell of a round back photo album. The method is characterized by comprising the following steps: (1) mounting, namely uniformly applying a layer of glue to the inner surface of the finished outer shell in an environment with the relative humidity of 60%-80% and the temperature of 20-25 DEG C, mounting a layer of lining paper on the glue, and controlling the humidity of the outer shell after mounting the lining paper to be 18%-20%; (2) pressing a round back, namely instantly arranging the middle back of the outer shell obtained in the step (1) into a base of a hot rounding mould supported by a soft buffer material, applying a pressure of 20-35 kgf to the hot rounding mould with the outer shell through a pressing head on hot rounding equipment to enable the middle back of the outer shell to form the round back, and meanwhile, setting the temperature of the pressing head to be 160-190 DEG C, controlling the action time of the pressing head to be 4-6 s and heating and shaping the round back formed by stamping to obtain a smoother round back. The method has the advantage that the smoother round back can be easily obtained by the method.

Description

technical field [0001] The invention relates to a method for making a round-backed photo album, in particular to a method for rounding the middle back of the leather shell of the round-backed photo album. Background technique [0002] In the existing technology, after the lining of the leather shell is completed for the round-backed album, the humidity of the leather shell is generally above 20%. If it is ironed immediately, the cover of the film will produce pores. Dry in the existing environment for at least 24 hours. When the humidity of the leather shell reaches 10%-14%, put the leather shell in a special mold, and stamp the special mold with the ironing equipment to make the middle back of the leather shell deform into a circle Back, and heat it to set. The stress tolerance range of the dried leather shell is small. Under the action of the large force of the ironing equipment for a short time, the round back is prone to line-shaped cracks. At the same time, the deforma...

AI Technical Summary

Problems solved by technology

The stress tolerance range of the dried leather shell is small. Under the action of the large force of the ironing equipment for a short time, the round back is prone to line-shaped cracks. At the same time, the deformation of the back of the leather shell is different during stamping. Wrinkles will affect the appearance and function of the product