阅读说明：本技术 一种泡沫塑料盒体内壁高压硬化加工工艺 (High-pressure hardening processing technology for inner wall of foamed plastic box body ) 是由 余景正 杨在勇 于 2021-08-20 设计创作，主要内容包括：本发明公开了一种泡沫塑料盒体内壁高压硬化加工工艺,包括以下步骤：称取原料；可发泡型聚丙烯材料颗粒加热至189-210℃,保温熔融35-45分钟,得到熔融的可发泡型聚丙烯材料；将除去发泡剂以外的所有原料依次加入到的熔融状态下的可发泡型聚丙烯材料中,得到混合料；之后,将得到的混合料与发泡剂一起置于高压发泡机中,并加热或散热至料温20-30℃,并且高压发泡机的循环压力为9-11kg/cm～(2)。本发明所述的一种泡沫塑料盒体内壁高压硬化加工工艺,工艺过程简单、操作方便,通过高温、高压生产出高硬度的内壁层,进而增加了泡沫塑料盒的结构强度,增加抗冲击力的能力,使泡沫塑料盒在打包和运输过程中不易损坏,提升泡沫箱的挺性和强度,在搬运中不易弯曲。(The invention discloses a high-pressure hardening processing technology for the inner wall of a foam plastic box body, which comprises the following steps: weighing raw materials; heating the foamable polypropylene material particles to 189-; sequentially adding all raw materials except the foaming agent into the foaming type polypropylene material in a molten state to obtain a mixture; then, putting the obtained mixture and foaming agent into a high-pressure foaming machine, heating or radiating to the material temperature of 20-30 ℃, and the circulating pressure of the high-pressure foaming machine is 9-11kg/cm 2 . The high-pressure hardening processing technology for the inner wall of the foam plastic box body has the advantages of simple technological process and operationThe convenience, through the inner wall layer of high rigidity is produced to high temperature, high pressure, and then increased the structural strength of foamed plastic box, increase the ability of impact resistance, make foamed plastic box not fragile in packing and transportation, promote the stiffness and the intensity of foam case, be difficult for the bending in the transport.)

1. A high-pressure hardening processing technology for the inner wall of a foam plastic box body is characterized in that: the method comprises the following steps:

(1) weighing the raw materials: the raw materials are taken according to the parts by weight: 70-95 parts of a foaming type polypropylene material, 15-26 parts of epoxy resin, 10-25 parts of a solvent, 20-35 parts of a ceramic glaze, 12-26 parts of wood fiber powder, 2-8 parts of a flame-retardant synergist, 20-35 parts of modified sepiolite, 5-10 parts of a foaming agent and 7-13 parts of a foam stabilizer;

(2) and heating: heating the foamable polypropylene material particles to 189-;

(3) and mixing raw materials: sequentially adding all the raw materials except the foaming agent in the step (1) into the foaming type polypropylene material in the molten state in the step (2) to obtain a mixture;

(4) and foaming: putting the mixture obtained in the step (3) and a foaming agent into a high-pressure foaming machine, heating or radiating to the material temperature of 20-30 ℃, and the circulating pressure of the high-pressure foaming machine is 9-11kg/cm²；

(5) And forming: controlling the mold temperature of the foaming molding mold to be 61-75 ℃, and spraying the foamed material into the foaming molding mold by a high-pressure foaming machine;

(6) and hardening: the time of mold closing reaction molding of the foaming molding mold is 11-15min, and the hardened and molded inner wall layer is placed for 24 hours at normal temperature to obtain an inner wall layer blank;

(7) trimming, namely trimming the inner wall layer blank formed in the step (6) to remove redundant corners to obtain a complete inner wall layer;

(8) and (5) bonding, namely fixing the inner wall layer in the step (7) in the inner wall of the box body.

2. The high-pressure hardening processing technology for the inner wall of the foam plastic box body according to claim 1, characterized in that: in the step (1), the solvent is at least one of toluene and decalin.

3. The high-pressure hardening processing technology for the inner wall of the foam plastic box body according to claim 1, characterized in that: in the step (1), the foaming agent is at least one of azodicarbonamide, trichlorofluoromethane, dichlorodifluoromethane, cyclopentane and isopentane.

4. The high-pressure hardening processing technology for the inner wall of the foam plastic box body according to claim 1, characterized in that: in the step (3), before the raw materials are mixed, the raw materials in each component need to be filtered, and the single raw materials stuck together are split.

5. The high-pressure hardening processing technology for the inner wall of the foam plastic box body according to claim 1, characterized in that: in the step (3), all the raw materials except the blowing agent are sequentially added to the foamable polypropylene material in a molten state, and then stirred.

6. The high-pressure hardening processing technology for the inner wall of the foam plastic box body according to claim 1, characterized in that: and (6) coating glue on the inner wall of the box body, coating glue on the outer side surface of the inner wall layer, then bonding the inner wall layer and the inner wall of the box body, and fixing the inner wall layer in the inner wall of the box body through the glue.

Technical Field

The invention relates to the technical field of foamed plastics, in particular to a high-pressure hardening processing technology for an inner wall of a foamed plastic box body.

Background

The foamed plastic is a high polymer material formed by dispersing a large number of gas micropores in solid plastic, has the characteristics of light weight, heat insulation, sound absorption, shock absorption and the like, has dielectric properties superior to matrix resin, and has wide application range. Almost all kinds of plastics can be used as foams, and foam molding has become an important field in the processing of plastics, and foams are polymer materials containing plastics as a basic component and a large number of bubbles, and thus can be said to be composite plastics using gas as a filler. Compared with pure plastic, the composite material has many excellent properties, such as light weight, high specific strength, impact load absorption, good heat insulation and sound insulation properties, and the like. Therefore, the method is widely applied to the fields of industry, agriculture, building, transportation and the like.

Most of the existing foam plastic boxes are resistant to impact by means of the self impact resistance, but the self impact resistance of the foam plastic is limited, so that the existing foam plastic boxes can only be used for primary impact resistance operation, and the foam plastic boxes are easy to damage.

Disclosure of Invention

The invention mainly aims to provide a high-pressure hardening processing technology for the inner wall of a foam plastic box body, which can effectively solve the problems in the background technology.

In order to achieve the purpose, the invention adopts the technical scheme that:

a high-pressure hardening processing technology for the inner wall of a foam plastic box body comprises the following steps:

(1) weighing the raw materials: the raw materials are taken according to the parts by weight: 70-95 parts of a foaming type polypropylene material, 15-26 parts of epoxy resin, 10-25 parts of a solvent, 20-35 parts of a ceramic glaze, 12-26 parts of wood fiber powder, 2-8 parts of a flame-retardant synergist, 20-35 parts of modified sepiolite, 5-10 parts of a foaming agent and 7-13 parts of a foam stabilizer;

(2) and heating: heating the foamable polypropylene material particles to 189-;

(3) and mixing raw materials: sequentially adding all the raw materials except the foaming agent in the step (1) into the foaming type polypropylene material in the molten state in the step (2) to obtain a mixture;

(4) foaming and blowing: putting the mixture obtained in the step (3) and a foaming agent into a high-pressure foaming machine, heating or radiating to the material temperature of 20-30 ℃, and the circulating pressure of the high-pressure foaming machine is 9-11kg/cm²；

(5) And forming: controlling the mold temperature of the foaming molding mold to be 61-75 ℃, and spraying the foamed material into the foaming molding mold by a high-pressure foaming machine;

(6) and hardening: the time of mold closing reaction molding of the foaming molding mold is 11-15min, and the hardened and molded inner wall layer is placed for 24 hours at normal temperature to obtain an inner wall layer blank;

(7) trimming, namely trimming the inner wall layer blank formed in the step (6) to remove redundant corners to obtain a complete inner wall layer;

(8) and (5) bonding, namely fixing the inner wall layer in the step (7) in the inner wall of the box body.

Preferably, in the step (1), the solvent is at least one of toluene and decalin.

Through the technical scheme, the toluene and the decalin are similar to the foamable polypropylene material in structure, so that the toluene and the decalin are convenient to dissolve.

Preferably, in the step (1), the blowing agent is at least one of azodicarbonamide, trichlorofluoromethane, dichlorodifluoromethane, cyclopentane, and isopentane.

Through the technical scheme, the arranged foaming agent enables the polyvinyl chloride to expand.

Preferably, in the step (3), before the raw materials are mixed, the raw materials in each component need to be filtered, and the single parts of the raw materials which are stuck together need to be separated.

Through above-mentioned technical scheme, filter the raw materials, select the raw materials of large granule aggregative property to carry out the split to the large granule raw materials, and then improve its mixed effect.

Preferably, in the step (3), after all the raw materials except the blowing agent are sequentially added to the foamable polypropylene material in a molten state, stirring is required.

Through above-mentioned technical scheme, improve the mixed effect through the stirring.

Preferably, in the step (6), glue is coated on the inner wall of the box body, glue is coated on the outer side surface of the inner wall layer, then the inner wall layer is bonded with the inner wall of the box body, and the inner wall layer is fixed in the inner wall of the box body through the glue.

Through above-mentioned technical scheme, fix box body and interior wall layer through glue, it is swift convenient.

Compared with the prior art, the invention has the following beneficial effects: this foamed plastic box inner wall high pressure hardening processing technology, process is simple, convenient operation, produces the inner wall layer of high rigidity through high temperature, high pressure, and then has increased foamed plastic box's structural strength, increases the ability of impact resistance, makes foamed plastic box not fragile in packing and transportation, promotes foamed box's stiffness and intensity, and is not easily crooked in the transport.

Drawings

FIG. 1 is a flow chart of a high-pressure hardening process for the inner wall of a foam plastic box body according to the present invention.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

Example 1

(1) Weighing the raw materials: the raw materials are taken according to the parts by weight: 75 parts of a foaming type polypropylene material, 16 parts of epoxy resin, 17 parts of a solvent, 25 parts of ceramic glaze, 16 parts of wood fiber powder, 6 parts of a flame-retardant synergist, 23 parts of modified sepiolite, 7 parts of a foaming agent and 11 parts of a foam stabilizer, wherein the solvent is toluene, the foaming agent is azodicarbonamide, and polyvinyl chloride is expanded through the foaming agent.

(2) And heating: heating the foaming polypropylene material particles to 195 ℃, and melting for 38 minutes under the condition of heat preservation to obtain a molten foaming polypropylene material;

(3) and mixing raw materials: sequentially adding all the raw materials except the foaming agent in the step (1) into the foaming type polypropylene material in the molten state in the step (2) to obtain a mixture, wherein the raw materials in all the components need to be filtered before the raw materials are mixed, screening out the raw materials with large particle aggregation, splitting the raw materials with large particles to improve the mixing effect, and then stirring;

(4) and foaming: putting the mixture obtained in the step (3) and a foaming agent into a high-pressure foaming machine, heating or radiating to the material temperature of 27 ℃, wherein the circulating pressure of the high-pressure foaming machine is 9kg/cm²；

(5) And forming: controlling the mold temperature of the foaming molding mold at 67 ℃, and spraying the foamed material into the foaming molding mold by a high-pressure foaming machine;

(6) and hardening: the mold closing reaction forming time of the foaming forming mold is 11min, and the hardened and molded inner wall layer is placed for 24 hours at normal temperature to obtain an inner wall layer blank;

(7) trimming, namely trimming the inner wall layer blank formed in the step (6) to remove redundant corners to obtain a complete inner wall layer;

(8) and (3) bonding, namely fixing the inner wall layer in the step (7) in the inner wall of the box body, coating glue on the outer side surface of the inner wall layer, bonding the inner wall layer and the inner wall of the box body, and fixing the inner wall layer in the inner wall of the box body through the glue.

Example 2

(1) Weighing the raw materials: the raw materials are taken according to the parts by weight: 90 parts of a foaming type polypropylene material, 21 parts of epoxy resin, 19 parts of a solvent, 33 parts of ceramic glaze, 22 parts of wood fiber powder, 3 parts of a flame-retardant synergist, 27 parts of modified sepiolite, 7 parts of a foaming agent and 7 parts of a foam stabilizer, wherein the solvent is a mixed solution of toluene and decalin, the foaming agent is a mixed solution of azodicarbonamide, trichlorofluoromethane and dichlorodifluoromethane, and polyvinyl chloride is expanded by the foaming agent.

(2) And heating: heating the foaming polypropylene material particles to 205 ℃, and melting for 38 minutes under the condition of heat preservation to obtain a molten foaming polypropylene material;

(3) and mixing raw materials: sequentially adding all the raw materials except the foaming agent in the step (1) into the foaming type polypropylene material in the molten state in the step (2) to obtain a mixture, wherein the raw materials in all the components need to be filtered before the raw materials are mixed, screening out the raw materials with large particle aggregation, splitting the raw materials with large particles to improve the mixing effect, and then stirring;

(4) and foaming: putting the mixture obtained in the step (3) and a foaming agent into a high-pressure foaming machine, heating or radiating to the material temperature of 29 ℃, wherein the circulating pressure of the high-pressure foaming machine is 9kg/cm²；

(5) And forming: controlling the mold temperature of the foaming molding mold at 72 ℃, and spraying the foamed material into the foaming molding mold by a high-pressure foaming machine;

(6) and hardening: the mold closing reaction forming time of the foaming forming mold is 15min, and the hardened and molded inner wall layer is placed for 24 hours at normal temperature to obtain an inner wall layer blank;

(7) trimming, namely trimming the inner wall layer blank formed in the step (6) to remove redundant corners to obtain a complete inner wall layer;

(8) and (3) bonding, namely fixing the inner wall layer in the step (7) in the inner wall of the box body, coating glue on the outer side surface of the inner wall layer, bonding the inner wall layer and the inner wall of the box body, and fixing the inner wall layer in the inner wall of the box body through the glue.

Example 3

(1) Weighing the raw materials: the raw materials are taken according to the parts by weight: 87 parts of a foaming type polypropylene material, 17 parts of epoxy resin, 11 parts of a solvent, 29 parts of ceramic glaze, 13 parts of wood fiber powder, 4 parts of a flame-retardant synergist, 24 parts of modified sepiolite, 9 parts of a foaming agent and 8 parts of a foam stabilizer, wherein the solvent is toluene, the foaming agent is isopentane, and polyvinyl chloride is expanded through the foaming agent.

(2) And heating: heating the foaming polypropylene material particles to 198 ℃, and melting for 41 minutes under the condition of heat preservation to obtain a molten foaming polypropylene material;

(3) and mixing raw materials: sequentially adding all the raw materials except the foaming agent in the step (1) into the foaming type polypropylene material in the molten state in the step (2) to obtain a mixture, wherein the raw materials in all the components need to be filtered before the raw materials are mixed, screening out the raw materials with large particle aggregation, splitting the raw materials with large particles to improve the mixing effect, and then stirring;

(4) and foaming: putting the mixture obtained in the step (3) and a foaming agent into a high-pressure foaming machine, heating or radiating to the material temperature of 21 ℃, wherein the circulating pressure of the high-pressure foaming machine is 10kg/cm²；

(5) And forming: controlling the mold temperature of the foaming molding mold at 75 ℃, and spraying the foamed material into the foaming molding mold by a high-pressure foaming machine;

(6) and hardening: the mold closing reaction forming time of the foaming forming mold is 15min, and the hardened and molded inner wall layer is placed for 24 hours at normal temperature to obtain an inner wall layer blank;

(7) trimming, namely trimming the inner wall layer blank formed in the step (6) to remove redundant corners to obtain a complete inner wall layer;

(8) and (3) bonding, namely fixing the inner wall layer in the step (7) in the inner wall of the box body, coating glue on the outer side surface of the inner wall layer, bonding the inner wall layer and the inner wall of the box body, and fixing the inner wall layer in the inner wall of the box body through the glue.

Example 4

(1) Weighing the raw materials: the raw materials are taken according to the parts by weight: 92 parts of a foaming type polypropylene material, 25 parts of epoxy resin, 18 parts of a solvent, 21 parts of ceramic glaze, 13 parts of wood fiber powder, 7 parts of a flame-retardant synergist, 23 parts of modified sepiolite, 9 parts of a foaming agent and 7 parts of a foam stabilizer, wherein the solvent is toluene, the foaming agent is cyclopentane, and polyvinyl chloride is expanded through the foaming agent.

(2) And heating: heating the foaming polypropylene material particles to 193 ℃, and melting for 37 minutes under the condition of heat preservation to obtain a molten foaming polypropylene material;

(3) and mixing raw materials: sequentially adding all the raw materials except the foaming agent in the step (1) into the foaming type polypropylene material in the molten state in the step (2) to obtain a mixture, wherein the raw materials in all the components need to be filtered before the raw materials are mixed, screening out the raw materials with large particle aggregation, splitting the raw materials with large particles to improve the mixing effect, and then stirring;

(4) and foaming: putting the mixture obtained in the step (3) and a foaming agent into a high-pressure foaming machine, heating or radiating to the material temperature of 27 ℃, wherein the circulating pressure of the high-pressure foaming machine is 11kg/cm²；

(5) And forming: controlling the mold temperature of the foaming molding mold at 63 ℃, and spraying the foamed material into the foaming molding mold by a high-pressure foaming machine;

(6) and hardening: the mold closing reaction forming time of the foaming forming mold is 14min, and the hardened and molded inner wall layer is placed for 24 hours at normal temperature to obtain an inner wall layer blank;

(7) trimming, namely trimming the inner wall layer blank formed in the step (6) to remove redundant corners to obtain a complete inner wall layer;

(8) and (3) bonding, namely fixing the inner wall layer in the step (7) in the inner wall of the box body, coating glue on the outer side surface of the inner wall layer, bonding the inner wall layer and the inner wall of the box body, and fixing the inner wall layer in the inner wall of the box body through the glue.

And (3) comparison test:

the test was divided into group 1, group 2, group 3, group 4 and control group 5, group 1, group 2, group 3 and group 4 were used to make foam plastic boxes using the processes of example 1, example 2, example 3 and example 4, respectively, control group 5 was not equipped with an inner wall layer, the others were the same, water at the same temperature was set, and the insulation effect was recorded, with the following results:

as can be seen from the data in the table above, the inner wall layer after the high-pressure hardening processing technology for the inner wall of the foam plastic box body is used has obviously better heat preservation effect than the foam plastic box without the high-pressure hardening inner wall layer, and the heat preservation performance is improved.

Meanwhile, the comparative tests are respectively subjected to load tests, g is 10N/kg, and the results are as follows:

as can be seen from the data in the table above, the maximum load bearing capacity of the foam plastic box using the high-pressure hardening process is obviously greater than that of the foam plastic box not using the high-pressure hardening process, that is, the inner wall layer passing through the high-pressure hardening process obviously improves the structural strength of the foam plastic box, increases the impact resistance, ensures that the foam plastic box is not easy to damage in the packing and transporting processes, improves the stiffness and strength of the foam box, and is not easy to bend in the transportation process.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.