High-pressure hardening processing and manufacturing method for inner wall of foamed plastic box body

Abstract

The invention discloses a high-pressure hardening processing and manufacturing method for the inner wall of a foamed plastic box body, which comprises the following steps of: weighing raw materials; the preparation method comprises the following steps: weighing the following raw materials in parts by weight: 80-90 parts of a foamable polypropylene material, 12-23 parts of methylbenzene, 6-10 parts of cyclopentane, 20-30 parts of ceramic glaze, 15-25 parts of wood fiber powder, 3-7 parts of a flame-retardant synergist, 15-25 parts of modified sepiolite and 5-10 parts of a foam stabilizer, heating and melting, heating foamable polypropylene material particles to 190-205 DEG C to obtain a molten foamable polypropylene material, and carrying out extrusion molding on the foamable polypropylene material to obtain the flame-retardant ceramic glaze. All the raw materials except the foaming agent are sequentially added into the foamable polypropylene material in the molten state, and a mixture is obtained. According to the high-pressure hardening machining and manufacturing method for the inner wall of the foamed plastic box, the process manufacturing is simple, operation is convenient, the inner blank plate is arranged, the hardening material is added to the inner blank plate, and then the inner blank plate is attached to the inner wall of the foamed plastic box, so that the structural strength of the foamed plastic box is improved, and the service life of the foamed plastic box is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of foam plastic boxes, in particular to a high-pressure hardening processing and manufacturing method for the inner wall of a foam plastic box. Background Art

[0002] Due to its high porosity, low bulk density, high resilience and high thermal insulation performance, foam plastics have become an important raw material in the field of insulation and damping. Its internal network structure is orderly, the density is low and uniform, the physical performance indicators are stable, and it has good sound absorption and noise reduction functions. Based on the above advantages, foam plastics are widely used in civil, industrial, construction, transportation, military and other fields.

[0003] Foam plastic boxes are often used in the transportation of fruits and the packaging of items, but their inner walls are also made of foam plastic, so their structural strength is limited, making the inner walls of the foam plastic boxes easily damaged. Summary of the invention

[0004] The main purpose of the present invention is to provide a high-pressure hardening processing and manufacturing method for the inner wall of a foam plastic box body, which can effectively solve the problems in the background technology.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A method for high-pressure hardening processing and manufacturing the inner wall of a foam plastic box body, comprising the following steps:

[0007] (1) Weighing raw materials, the raw materials are taken in parts by weight: 80-90 parts of foamable polypropylene material, 12-23 parts of toluene, 6-10 parts of cyclopentane, 20-30 parts of ceramic glaze, 15-25 parts of wood fiber powder, 3-7 parts of flame retardant synergist, 15-25 parts of modified sepiolite, and 5-10 parts of foam stabilizer;

[0008] (2) heating and melting, heating the expandable polypropylene material particles to 190-205° C. to obtain a molten expandable polypropylene material, and sequentially adding all raw materials except the foaming agent into the molten expandable polypropylene material to obtain a mixture;

[0009] (3) Foaming: placing the above-mentioned mixed material and the foaming agent together in a high-pressure foaming machine, and heating or dissipating heat to a material temperature of 22-28° C.;

[0010] (4) Molding and trimming: the temperature of the foaming mold is controlled at 63-73° C., and the foamed material is sprayed into the foaming mold by a high-pressure foaming machine. The mold closing reaction molding time of the foaming mold is 12-15 minutes. The hardened and molded inner wall layer is cooled at room temperature to obtain an inner wall layer blank. The inner wall layer blank is then trimmed to remove excess corners to obtain a complete inner wall layer;

[0011] (5) treating the blank plate, moistening the surface of the inner wall layer blank plate with ethanol, then fumigating it with water vapor, and letting the inner wall layer blank plate dry naturally to obtain a dry blank plate;

[0012] (6) Hardening: brush a layer of mucus on the surface of the dry blank, and then brush a layer of hardening material on the surface of the mucus, and wait for it to dry naturally to obtain a high-pressure hardened board;

[0013] (7) Bonding: Apply glue to the inner wall of the box body, apply glue to the outer side of the high-pressure hardening plate, and then bond the high-pressure hardening plate to the inner wall of the box body.

[0014] Preferably, the hardener is made by mixing urea, magnesium oxide, phosphoric acid, gallium nitride and water.

[0015] Preferably, the raw materials in each component need to be filtered before mixing the raw materials.

[0016] Through the above technical solution, the box body and the inner wall layer are fixed by glue, which is quick and convenient.

[0017] Compared with the prior art, the present invention has the following beneficial effects: the high-pressure hardening processing and manufacturing method of the inner wall of the foam plastic box has a simple manufacturing process and is easy to operate. By setting an inner blank plate, adding hardening material on the inner blank plate, and then attaching the inner blank plate to the inner wall of the foam plastic box, the structural strength of the foam plastic box is improved and the service life of the foam plastic box is increased. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0019] Example 1

[0020] A method for high-pressure hardening processing and manufacturing the inner wall of a foam plastic box body, comprising the following steps:

[0021] (1) Weighing raw materials, the raw materials are as follows: 85 parts of foamable polypropylene material, 16 parts of toluene, 8 parts of cyclopentane, 23 parts of ceramic glaze, 18 parts of wood fiber powder, 4 parts of flame retardant synergist, 16 parts of modified sepiolite, and 8 parts of foam stabilizer;

[0022] (2) heating and melting, heating the expandable polypropylene material particles to 195° C. to obtain a molten expandable polypropylene material, and sequentially adding all raw materials except the foaming agent to the molten expandable polypropylene material to obtain a mixture. Before mixing the raw materials, the raw materials in each component need to be filtered;

[0023] (3) Foaming: placing the above mixed material and the foaming agent together in a high-pressure foaming machine and heating to a material temperature of 25° C.;

[0024] (4) Molding and trimming: the temperature of the foaming mold is controlled at 67° C., and the foamed material is sprayed into the foaming mold by a high-pressure foaming machine. The mold closing reaction molding time of the foaming mold is 15 minutes. The hardened and molded inner wall layer is cooled at room temperature to obtain an inner wall layer blank. The inner wall layer blank is then trimmed to remove excess corners to obtain a complete inner wall layer;

[0025] (5) treating the blank plate, moistening the surface of the inner wall layer blank plate with ethanol, then fumigating it with water vapor, and letting the inner wall layer blank plate dry naturally to obtain a dry blank plate;

[0026] (6) Hardening: brush a layer of mucus on the surface of the dry blank, and then brush a layer of hardening material on the surface of the mucus, and wait for it to dry naturally to obtain a high-pressure hardened board, wherein the hardening material is made of a mixture of urea, magnesium oxide, phosphoric acid, gallium nitride and water;

[0027] (7) Bonding: Apply glue to the inner wall of the box body, apply glue to the outer side of the high-pressure hardening plate, and then bond the high-pressure hardening plate to the inner wall of the box body.

[0028] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A method for high pressure hardening of the inner wall of a foam plastic box, characterized in that: The following steps are involved: (1) Weighing raw materials, the raw materials are taken in parts by weight: 80-90 parts of foamable polypropylene material, 12-23 parts of toluene, 6-10 parts of cyclopentane, 20-30 parts of ceramic glaze, 15-25 parts of wood fiber powder, 3-7 parts of flame retardant synergist, 15-25 parts of modified sepiolite, and 5-10 parts of foam stabilizer; (2) heating and melting, heating the expandable polypropylene material particles to 190-205° C. to obtain a molten expandable polypropylene material, and sequentially adding all raw materials except the foaming agent into the molten expandable polypropylene material to obtain a mixture; (3) Foaming: placing the above-mentioned mixed material and the foaming agent together in a high-pressure foaming machine, and heating or dissipating heat to a material temperature of 22-28° C.; (4) Molding and trimming: the temperature of the foaming mold is controlled at 63-73° C., and the foamed material is sprayed into the foaming mold by a high-pressure foaming machine. The mold closing reaction molding time of the foaming mold is 12-15 minutes. The hardened and molded inner wall layer is cooled at room temperature to obtain an inner wall layer blank. The inner wall layer blank is then trimmed to remove excess corners to obtain a complete inner wall layer; (5) treating the blank plate, moistening the surface of the inner wall blank plate with ethanol, then fumigating it with water vapor, and letting the inner wall blank plate dry naturally to obtain a dry blank plate; (6) Hardening: brush a layer of mucus on the surface of the dry blank, and then brush a layer of hardening material on the surface of the mucus, and wait for it to dry naturally to obtain a high-pressure hardened board; (7) Bonding: Apply glue to the inner wall of the box body, apply glue to the outer side of the high-pressure hardening plate, and then bond the high-pressure hardening plate to the inner wall of the box body.

2. A method for high pressure hardening of the inner wall of a foam plastic box according to claim 1, characterized in that: The hardener is made from a mixture of urea, magnesium oxide, phosphoric acid, gallium nitride and water.

3. The method for manufacturing the inner wall of a foam plastic box under high pressure hardening according to claim 1, characterized in that: Before mixing the raw materials, the raw materials in each component need to be filtered.