Double-layer blistered coaming box cover production process and coaming box cover

Abstract

The application discloses a double-layer blister coaming box cover production process and a coaming box cover, and aims to solve the problems of weak bearing capacity of the blister box cover obtained by the existing processing process and high four-corner warping value (low flatness). The existing process is material selection-heating-vacuum blistering-molding-cooling-solidification-demolding-finishing, and the production process disclosed by the application adds an auxiliary material-corner guard sheet between the blistering and molding processes, and the corner guard sheet is added to the four corners of one plastic sheet in a plastic state, and then the molding is performed. Through practice and experimental analysis, the production process before this has a serious four-corner deformation degree and a high product warping value in terms of flatness, and the flatness of the product prepared by the production process of the application can reach within 5 mm.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of blistered panel box manufacturing, in particular to a double-layer blistered panel box cover production process and a panel box cover. BACKGROUND

[0002] The panel box is a packaging product that can provide great convenience for logistics transportation, which includes a top cover (ceiling cover), a middle foldable panel, and a bottom tray. When assembled, the three can form a larger containing cavity within an extremely short time, and when transported, they can be folded into a smaller volume and stacked to reduce space occupancy.

[0003] As one of the core components, the panel box cover is usually made of double-layer blistering process. After material selection (two plastic materials suitable for blistering), heating, vacuum blistering, cooling, solidification, demolding, and finishing, a qualified panel box cover is obtained. The first standard for whether it is qualified is the flatness of the surface after forming, whether there is warping, wrinkles, and deformation. However, the current double-layer blistering production process produces products with serious corner deformation and high warping value. SUMMARY

[0004] The present application provides a double-layer blistered panel box cover production process and a panel box cover to solve the above technical problems. Auxiliary material - corner protector sheet is added between the blistering and molding processes. The corner protector sheet is added to one of the plastic sheets in a plastic state, and then the mold is closed. This can significantly improve the warping value. The flatness of the plastic product after process improvement is high, and the carrying capacity is more excellent.

[0005] The technical solution adopted by the present application to solve the above technical problems is as follows:

[0006] A double-layer blistered panel box cover production process, comprising the following steps:

[0007] S1: selection: selecting double-layer blistering materials;

[0008] S2: heating: placing the two selected plastic sheets into the first mold and the second mold of the blistering machine, respectively, and heating them;

[0009] S3: blistering: mechanically or vacuum-sucking the softened plastic sheets onto the first mold and the second mold;

[0010] S4: adding auxiliary material: adding a corner protector sheet to the corner of any one of the first mold or the second mold;

[0011] S5: molding: the two plastic sheets in the mold are integrated under composite pressure;

[0012] S6: cooling solidification: the plastic is quickly solidified and keeps the required shape by cooling;

[0013] S7: demolding: after the blister layer of the box is completed, the blister mold is taken out of the blister machine, and the solidified plastic is taken out of the mold;

[0014] S8: trimming: trimming the edges of the shaped product to remove excess plastic.

[0015] Further, the corner guard sheet is triangular in cross-section.

[0016] Further, the corner guard sheet is made of plastic.

[0017] Further, the corner guard sheet is made of metal.

[0018] Further, the blistering process is vacuum blistering.

[0019] Further, the cooling solidification process is first weighted and shaped, with a shaping time of 10-15 minutes and natural cooling.

[0020] A coaming box cover prepared by a double-layer blister coaming box cover production process, comprising a first plate material and a second plate material that are complexly formed, and a corner guard sheet embedded in the four corners of the first plate material and the second plate material.

[0021] The beneficial effects of the present application are as follows:

[0022] 1) The production process of the present application, compared with the prior art, adds a corner guard sheet to the four corners of one of the heated plastic sheets in a plastic state before the mold is closed, and then the mold is closed. Through practice and experimental analysis, it is found that the warping degree of the original product without a corner guard sheet is basically above 10 mm, and after adding the corner guard sheet, the warping degree can be controlled to within 5 mm. The bearing capacity of the blister product without a corner guard is about 500 kg in the test, while the bearing capacity after adding a plastic corner guard can reach about 700 kg, and the bearing capacity after adding a steel sheet or an iron sheet can reach more than 900 kg.

[0023] 2) In addition to improving the flatness of the four corners, it is also found that the product obtained by this production process has significantly increased four-corner bearing and weighing capacity compared to before without changing the original plastic material and thickness. The bearing capacity of the blister product without a corner guard in the prior art is about 500 kg in the test, while the bearing capacity after adding a plastic corner guard can reach about 700 kg, and the bearing capacity after adding a steel sheet or an iron sheet can reach more than 900 kg. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1The process flowchart of the present application. DETAILED DESCRIPTION

[0025] The technical solutions of the present application are further described below with reference to the accompanying drawings.

[0026] As Figure 1 shown in a double-layer blister containment panel box cover production process, which comprises the following steps:

[0027] S1: selection: selection of double-layer blister material; the selection of blister material includes but is not limited to the use of HDPE, ABS and pp material.

[0028] S2: heating: the two plastic sheets selected are placed in the first mold and the second mold of the blister machine respectively, and they are heated at the same time, and the corner sheet does not need to be heated here. Since the double-layer blister mold is divided into concave mold and convex mold, they are exchanged according to the product and processing requirements during production. One of them is below and the other is hoisted above the machine. There is no limitation. In this embodiment, the first mold is defined as the upper mold and the second mold is defined as the lower mold.

[0029] S3: blistering: after S2 heating, the softened plastic sheet is vacuum adsorbed onto the first mold and the second mold.

[0030] S4: adding auxiliary material: adding corner sheet to the four corners of the second mold, i.e. the lower mold in this embodiment; in order to keep the thickness of the product unchanged after adding the corner sheet, the corresponding first mold and second mold need to do the thickness calculation of the corner sheet, that is, the same length, width and height of the corner sheet structure is reserved, so that the corner sheet is embedded in the mold when the mold is closed, ensuring that the thickness is unchanged after solidification. The material selection of the corner sheet includes but is not limited to plastic, metal, wood or other materials. The selection of the material is mainly based on the hardness characteristics of the corner sheet raw material, which directly determines the load-bearing capacity and anti-deformation ability of the formed product; the preferred metal material such as iron or alloy steel is used as the raw material of the corner sheet. The cross-sectional shape of the corner sheet includes but is not limited to triangle, variable shape or other irregular shape, and the preferred shape is triangle. According to the test, the corner sheet with triangular shape has stable and excellent yield rate, load-bearing capacity and anti-deformation ability.

[0031] S5: mold closing: the plastic sheets in the two molds are integrated under the combined pressure. In this embodiment, the blister machine is preferably an automatic circular turntable blister machine, and this process is completed by equipment control.

[0032] S6: cooling solidification: the plastic is quickly solidified and keeps the required shape by cooling, the cooling solidification is equipped with a cooling frame, and the cooling process is accelerated by the shaping frame and the increased counterweight, after the ten-minute preliminary shaping, the plastic is taken out from the cooling frame for natural cooling, and then enters the next process.

[0033] S7: demolding: after the plastic layer of the box body is completed, the plastic mold is taken out from the plastic machine, and the solidified plastic is taken out from the mold, which is completed by the automatic circular turntable plastic machine and the cooperation of the operator.

[0034] S8: trimming: trimming the edges of the shaped product to remove excess plastic to obtain the finished product.

[0035] The application also provides a fence box cover, which is prepared by the double-layer plastic suction fence box cover production process and includes a first plate material and a second plate material.

[0036] The product is directly obtained by the above process method, and the product structure is integrated with the plastic product processed by the above process in appearance, which includes two upper and lower plastic sheets, and four iron sheets are synthesized at the four corners between the upper and lower sheets. It can be understood that the corner guard sheet of the plastic suction fence box cover obtained by the above production process is a plastic, wooden, or other metal technical solution, and the plastic suction product obtained by the above production process is within the protection scope of the application.

[0037] The working principle of the application: the corner guard sheet is added before the mold closing in the fence box cover production process provided by the application, and the existing technology mold is entirely plastic after suction. When the mold is closed, the plastic is relatively soft due to the characteristics of the plastic itself, i.e. thermal expansion and cold contraction, and the four corners of the finished product are warped and uneven. The four corner warping of the finished product obtained by the process of adding the corner guard sheet according to the application can be significantly improved. According to the test, the warping degree of the four corners of the product produced at a heating temperature of 210 degrees and a mold closing pressure of 7 kg of air pressure is about 10 mm, and the warping degree of the finished product produced by the process of the application is only 2-3 mm under the same parameter environment.

[0038] The above description is an explanation of the application, not a limitation of the application, and the scope of the application is defined in the claims. Any modification within the protection scope of the application can be made.

Claims

1. A process for producing a double-layer blister deck lid of a blister deck box, characterized by: It comprises the following steps: S1: selection: selecting the double-layer blister material; S2: heating: placing the two selected plastic sheets into the first mold and the second mold of the blister machine respectively and heating them; S3: blistering: adsorbing the softened plastic sheets onto the first mold and the second mold by mechanical or vacuum force; S4: adding auxiliary material: the four corners of the first mold or the second mold are provided with reserved positions, and a corner protection sheet is arranged in the reserved position, and the material of the corner protection sheet is alloy steel; S5: mold closing: the plastic sheets in the two molds are integrated under the composite pressure; S6: cooling and solidification: the plastic is quickly solidified and keeps the required shape by cooling; S7: demolding: after the blistering of the box body is completed, the blister mold is taken out of the blister machine, and the solidified plastic is taken out of the mold; S8: trimming: trimming the edges of the formed product and removing the excess plastic.

2. The production process of a double-layer blister containment panel box cover according to claim 1, characterized in that: The cross section of the corner protection sheet is triangular.

3. The process for producing a cover for a double-walled blister-pallet box according to claim 1, characterized in that: The blistering process is vacuum blistering.

4. The process for producing a cover for a double-walled blister-pallet box according to claim 1, characterized in that: The process of the cooling and solidification process is first weighting and shaping, and the shaping time is 10-15 minutes, and natural cooling.

5. A carton lid characterised in that: The coaming box cover is prepared by the double-layer blister coaming box cover production process according to any one of claims 1-4, which comprises a first plate material and a second plate material which are integrally formed, and corner protection sheets are further embedded at the four corners of the first plate material and the second plate material.

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