Processing technology of watchband paper support

Abstract

The invention discloses a processing technology of a watchband paper support. The processing technology comprises the following preparation steps: (1) preparing a paper pulp liquid in a paper pulp pool; (2) paper pulp liquid is adsorbed through a forming section mold, and preliminary shaping of a wet blank is achieved; (3) hot-pressing and drying the wet blank through a hot-pressing section die; (4) discharging and taking the hot-pressed and dried product; by means of the mode, an integrated product structure can be obtained through injection molding of paper pulp, the structural design of hot pressing and the forming mold is combined, the production efficiency is high, and the product quality is good.

Description

Technical Field

[0001] The invention relates to the technical field of product packaging, and in particular to a processing technology for a watch strap paper tray. Background Art

[0002] At present, electronic products, cosmetics, etc. are paying more and more attention to the environmental protection of packaging. Attachment 1 is a watch strap paper holder product designed by the applicant, including several cards, points and limit strips, which are used to fix and package watch strap products. The previous preparation process is to stack multiple layers of paper to a thickness of 3 to 5 mm, and then combine the card, point and limit strip structure by punching, and finally combine them by bonding to form a watch strap paper holder product. This product acquisition method needs to be further optimized. The present invention has developed a production method with higher efficiency and better product quality. Summary of the invention

[0003] The main technical problem solved by the present invention is to provide a processing technology for a watch strap paper tray, which obtains an integrated product structure by injection molding paper pulp and combines the structural design of hot pressing and forming molds, thereby not only having high production efficiency but also good product quality.

[0004] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a processing technology for a strap paper holder, comprising the following preparation steps:

[0005] (1) Prepare pulp slurry in the pulp pool;

[0006] (2) The pulp liquid is absorbed by the forming section mold to achieve preliminary shaping of the wet embryo;

[0007] (3) hot pressing and drying the wet embryo through a hot pressing section mold;

[0008] (4) Unload and remove products after hot pressing and drying.

[0009] Preferably, the pulp slurry comprises 35% sugarcane pulp and 65% bamboo pulp.

[0010] Preferably, the forming section mold comprises an upper forming mold and a lower forming mold, a lower forming mesh is arranged in the mold core of the lower forming mold, and the initial shaping of the wet embryo is achieved by immersing the lower forming mold in the pulp pool and then closing the mold with the upper forming mold.

[0011] Preferably, the porosity of the lower molding die is higher than the porosity of the upper molding die.

[0012] Preferably, the woven net comprises a bottom net and a surface net, the bottom net is placed above the surface net, and the mesh number of the bottom net is smaller than that of the surface net.

[0013] Preferably, the molding upper mold is transferred to the hot pressing section mold, and the hot pressing section mold includes a hot pressing upper mold and a hot pressing lower mold. The molding upper mold and the hot pressing lower mold are initially combined to transfer the initially shaped wet embryo to the hot pressing lower mold, and then the hot pressing upper mold and the hot pressing lower mold are combined for hot pressing.

[0014] Preferably, the hot pressing drying time is between 60s and 70s, and the mold temperature of the hot pressing lower mold is lower than the mold temperature of the hot pressing upper mold.

[0015] Preferably, the hot pressing upper mold and the hot pressing lower mold are opened after hot pressing, the product is adsorbed on the hot pressing upper mold, the hot pressing upper mold is moved to the unloading platform, and the adsorption negative pressure is switched to blowing from top to bottom, so as to remove the strap paper support.

[0016] Preferably, a hot upper woven mesh is arranged in the hot pressing upper mold, and the opening rate of the hot pressing upper mold is unevenly arranged, wherein the opening rate of the mold position corresponding to the card point and the limit strip in the strap paper support structure is higher than the opening rate of the middle area.

[0017] Preferably, the porosity of the hot pressing upper die is higher than the porosity of the hot pressing lower die.

[0018] The beneficial effects of the present invention are:

[0019] Aiming at the processing process of the watch strap paper tray, the present invention boldly attempts to innovate the process on the basis of the original preparation process of paper stacking, gluing and assembling, from the preparation of pulp liquid, the design of the forming section mold, the design of the hot pressing section mold, the connection between the two section molds and the product transfer, to the final product unloading, the whole production process is simple and smooth, and the prepared watch strap paper tray product has an integrated structure, and the quality is more stable than the previous preparation method, and the production efficiency is higher. The front of the product is smooth and traceless, and the whole processing process is easy to introduce into mass production and automated production. It is the first time to be developed and introduced among peers, and has very good technical promotion value and market promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the watch strap paper holder product of the present invention;

[0021] Figure 2 It is a schematic diagram of the state of the upper molding die and the lower molding die of the present invention being molded together;

[0022] Figure 3 It is the mold core structure of the upper mold of the present invention, which is used to reflect the opening rate setting;

[0023] Figure 4 It is the mold core structure of the lower molding mold of the present invention, which is used to reflect the opening rate setting;

[0024] Figure 5It is the mold core structure of the hot pressing upper mold of the present invention, which is used to reflect the opening rate setting;

[0025] Figure 6 It is the mold core structure of the hot pressing lower mold of the present invention, which is used to reflect the opening rate setting. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are described in detail below so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0027] Example:

[0028] The present invention provides a processing technology for a strap paper holder, wherein the structure of the strap paper holder is as follows: Figure 1 As shown, for shaping and packaging watch strap products, an integrated watch strap paper tray can be obtained through the processing technology of the present invention, which not only has high production efficiency but also good product quality.

[0029] The watch strap paper support processing technology of the present invention adjusts the previous paper bonding and assembly method, and innovatively adopts the concept of injection molding pulp. The pulp material is made of natural fibers, specifically including 35% sugarcane pulp and 65% bamboo pulp. The pulp is white in color and has a thermal expansion coefficient of 1.0026. This is the first step in the processing, and the pulp liquid is prepared in the pulp pool.

[0030] Then the pulp liquid is absorbed by the forming section mold, specifically, Figure 2 As shown, the forming section mold includes a forming upper mold and a forming lower mold, and the product thickness after the two are molded together is 1.15mm; further, a forming lower woven net is arranged in the mold core of the forming lower mold, and the forming lower mold is immersed in the pulp pool and then molded together with the forming upper mold to achieve preliminary shaping of the wet embryo. In order to maximize the adsorption of paper fibers in the pulp liquid, the forming lower woven net includes a bottom net and a surface net, wherein the bottom net is placed above the surface net, and the mesh number of the bottom net is smaller than the surface net, for example, it can be set to 40 mesh for the bottom net and 80 mesh for the surface net. In addition, in order to ensure the maximum retention of paper fibers and increase the range of water discharge, the opening rate of the forming lower mold is set to be higher than the opening rate of the forming upper mold, as shown in the figure. Figure 3 and Figure 4 .

[0031] The lower mold is sunk into the pulp pool, and the paper fibers are adsorbed in the lower mold. A vacuum is drawn below the lower mold to remove the liquid in the pulp, and the paper fibers are retained on the lower woven net. Then the upper mold and the lower mold are closed to complete the initial shaping of the wet embryo of the paper fibers.

[0032] Furthermore, the forming upper mold is transferred to the hot pressing section mold, and the hot pressing section mold is used to perform hot pressing and drying on the wet embryo; specifically, the hot pressing section mold includes a hot pressing upper mold and a hot pressing lower mold, and the above-mentioned forming upper mold is combined with the hot pressing lower mold to transfer the preliminarily shaped wet embryo to the hot pressing lower mold, thereby realizing the processing switching between the forming section mold and the hot pressing section mold, and then the hot pressing upper mold is combined with the hot pressing lower mold for hot pressing, and the wet embryo is hot pressed and dried. It is worth noting that the hot pressing drying time is between 60s and 70s, and the mold temperature of the hot pressing lower mold is set to be lower than the mold temperature of the hot pressing upper mold. For example, the mold temperature of the hot pressing lower mold can be set to 120℃, and the mold temperature of the hot pressing upper mold is set to 150℃. This is mainly because the side of the paper tray product that is attached to the hot pressing lower mold is the front side, and the quality requirements are relatively high. The front side of the paper tray needs to be flat and smooth, while the side of the paper tray product that is attached to the hot pressing upper mold is the back side, and the quality requirements are not as high as the front side. Therefore, in order to shorten the molding time and ensure the quality of both sides of the paper tray product, the mold temperature of the hot pressing lower mold is set to be lower than the mold temperature of the hot pressing upper mold.

[0033] like Figure 5 and Figure 6 As shown, a hot-top braided net is also provided in the hot-pressing upper mold, mainly to avoid the formation of bulges on the surface of the product that affect the appearance. The opening rate of the hot-pressing upper mold is unevenly set, wherein the opening rate of the mold positions corresponding to the card points and the limit strips in the strap paper support structure is higher than the opening rate of the middle area. This design is related to the thickness of the structure of the strap paper support product itself. The pulp thickness of the card points and the limit strips in the strap paper support structure is higher than the thickness in the middle area. In addition, the opening rate of the hot-pressing upper mold is higher than the opening rate of the hot-pressing lower mold. For example, the opening rate of the mold positions corresponding to the card points and the limit strips in the strap paper support structure in the hot-pressing upper mold is set to 3%, the opening rate in the middle area is set to 0.91%, and the opening rate of the hot-pressing lower mold is set to 0.73%.

[0034] Finally, the hot pressing upper mold and the hot pressing lower mold are opened after hot pressing for a certain period of time. Generally, the hot pressing time is 70 seconds. When the hot pressing section mold is opened, the paper tray product is adsorbed on the hot pressing upper mold, and the hot pressing upper mold is moved to the unloading platform. The adsorption negative pressure is switched to blowing from top to bottom, so as to remove the strap paper tray and complete the processing of the strap paper tray.

[0035] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A processing technology for a watch strap paper holder, characterized in that: The method comprises the following preparation steps: (1) Prepare pulp slurry in the pulp pool; (2) The pulp liquid is absorbed by the forming section mold to achieve preliminary shaping of the wet embryo; (3) hot pressing and drying the wet embryo through a hot pressing section mold; (4) Unload and remove products after hot pressing and drying.

2. The processing technology of a watch strap paper holder according to claim 1, characterized in that: The pulp liquor comprises 35% cane pulp and 65% bamboo pulp.

3. The processing technology of a watch strap paper holder according to claim 1, characterized in that: The molding section mold comprises an upper molding mold and a lower molding mold. A lower molding net is arranged in the mold core of the lower molding mold. The lower molding mold is immersed in the pulp pool and then combined with the upper molding mold to achieve preliminary shaping of the wet embryo.

4. The processing technology of the watch strap paper holder according to claim 3 is characterized in that: The opening rate of the lower molding die is higher than the opening rate of the upper molding die.

5. The processing technology of the watch strap paper holder according to claim 3 is characterized in that: The woven net comprises a bottom net and a surface net, wherein the bottom net is placed above the rigid surface net, and the mesh number of the bottom net is smaller than that of the surface net.

6. The processing technology of a watch strap paper holder according to claim 3, characterized in that: The forming upper mold is transferred to the hot pressing section mold, and the hot pressing section mold includes a hot pressing upper mold and a hot pressing lower mold. The forming upper mold and the hot pressing lower mold are initially combined to transfer the initially shaped wet embryo to the hot pressing lower mold, and then the hot pressing upper mold and the hot pressing lower mold are combined for hot pressing.

7. The processing technology of the watch strap paper holder according to claim 6, characterized in that: The hot pressing drying time is between 60s and 70s, and the mold temperature of the hot pressing lower mold is lower than the mold temperature of the hot pressing upper mold.

8. The processing technology of the watch strap paper holder according to claim 6, characterized in that: The hot pressing upper mold and the hot pressing lower mold are opened after hot pressing, the product is adsorbed on the hot pressing upper mold, the hot pressing upper mold is moved to the unloading platform, and the adsorption negative pressure is switched to blowing from top to bottom, so as to remove the strap paper support.

9. The processing technology of the watch strap paper holder according to claim 6, characterized in that: A hot upper woven net is arranged in the hot pressing upper mold, and the opening rate of the hot pressing upper mold is unevenly arranged, wherein the opening rate of the mold position corresponding to the card point and the limit strip in the strap paper support structure is higher than the opening rate of the middle area.

10. The processing technology of the watch strap paper holder according to claim 6, characterized in that: The opening rate of the hot pressing upper mold is higher than the opening rate of the hot pressing lower mold.

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