CN115519802A - Mold pressing preparation process of environment-friendly student desk and stool - Google Patents

Mold pressing preparation process of environment-friendly student desk and stool Download PDF

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Publication number
CN115519802A
CN115519802A CN202211335618.4A CN202211335618A CN115519802A CN 115519802 A CN115519802 A CN 115519802A CN 202211335618 A CN202211335618 A CN 202211335618A CN 115519802 A CN115519802 A CN 115519802A
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China
Prior art keywords
environment
friendly
die
sieved
preparation process
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Pending
Application number
CN202211335618.4A
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Chinese (zh)
Inventor
刘成华
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Chongqing Jianlong Furniture Co ltd
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Chongqing Jianlong Furniture Co ltd
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Priority to CN202211335618.4A priority Critical patent/CN115519802A/en
Publication of CN115519802A publication Critical patent/CN115519802A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
    • C08L1/02—Cellulose; Modified cellulose
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L101/00—Compositions of unspecified macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L97/00—Compositions of lignin-containing materials
    • C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2103/00—Use of resin-bonded materials as moulding material
    • B29K2103/04—Inorganic materials

Abstract

The invention belongs to the technical field of mould pressing, and particularly discloses a mould pressing preparation process of an environment-friendly student desk stool, which comprises the following steps: step 1, raw material treatment: crushing various wastes into chips, sieving the chips with a 40-80-mesh sieve, and preparing a plasticizer, an internal release agent and environment-friendly glue; step 2 preparation of green compacts: uniformly mixing and stirring the waste scraps prepared in the step 1, a plasticizer, a release agent and environment-friendly glue to obtain a blank; step 3, preparing a die: preparing a steel die in the shape of a desk stool by using a steel plate, and coating an external release agent on the surface of the steel die; and step 4, compression molding: and (3) filling the blank obtained in the step (2) into the steel die prepared in the step (3), placing the steel die into a die press for hot press forming, taking the steel die out of the die press after forming, cooling, and taking off the steel die to obtain the die-pressed environment-friendly student desk stool. By adopting the scheme of the invention, a large amount of waste is recycled, and the environment-friendly student desk stool is obtained by utilizing lower cost.

Description

Mold pressing preparation process of environment-friendly student desk and stool
Technical Field
The invention belongs to the technical field of mould pressing, and particularly relates to a mould pressing preparation process of an environment-friendly student desk stool.
Background
The compression molding is called compression molding for short; the plastic or rubber compound is heated and pressed in a closed die cavity to form the product. The raw material is usually in the form of powder, granule, agglomerate, flake, etc., or the raw material is prepared into a blank similar to the shape of the product, and then the blank is placed in a heated mold cavity, and then the mold is closed and pressed to make it be formed and solidified or vulcanized, and then the product is obtained by demolding, and said method is applicable to the forming processing of thermosetting plastics, etc.
In addition, along with the development of human life, the quality of material life is greatly improved, and meanwhile, a large number of waste books, newspapers, wood residues and the like are generated, wherein the waste is crushed to be used as filler in a material blank, curing glue is added, and then the material blank is pressurized and heated to prepare various components in different shapes, so that the waste is in a hot door direction for recycling and reusing at present.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a mold pressing preparation process of an environment-friendly student desk stool, which is used for recycling a large amount of waste and realizing the purpose of obtaining the environment-friendly student desk stool with lower cost.
In order to achieve the purpose, the invention adopts the following technical scheme:
a mold pressing preparation process of an environment-friendly student desk stool comprises the following steps:
step 1, raw material treatment: crushing various wastes into chips, sieving the chips with a 40-80 mesh sieve, and preparing a plasticizer, an internal release agent and environment-friendly glue;
step 2 preparation of green compacts: uniformly mixing and stirring the waste scraps prepared in the step 1, the plasticizer, the release agent and the environment-friendly glue to obtain a blank;
step 3, preparing a die: preparing a steel die in the shape of a desk stool by using a steel plate, and coating an external release agent on the surface of the steel die;
and step 4, compression molding: and (3) filling the blank obtained in the step (2) into the steel die prepared in the step (3), placing the steel die into a die press for hot press forming, taking the steel die out of the die press after forming, cooling, and taking off the steel die to obtain the die-pressed environment-friendly student desk stool.
Further, the plasticizer in the step 1 is one of nitrile rubber or polyamide resin.
Further, dividing the waste scraps in the step 1 into two equal parts, wherein one part is sieved by a 40-mesh sieve, the other part is sieved by a 60-mesh sieve, and then uniformly mixing the two parts of the waste scraps which are respectively sieved.
Further, dividing the waste scraps in the step 1 into two equal parts, wherein one part is sieved by a 40-mesh sieve, the other part is sieved by an 80-mesh sieve, and then uniformly mixing the two parts of the waste scraps which are respectively sieved.
Further, the waste fragments are divided into three equal parts, wherein the first part is sieved by a 40-mesh sieve, the second part is sieved by a 60-mesh sieve, the third part is sieved by a 80-mesh sieve, and then the three parts of the waste fragments which are respectively sieved are uniformly mixed.
Further, in the step 1, by weight, 100 parts of waste scraps, 3 to 4 parts of a plasticizer, 3 to 5 parts of an internal mold release agent and 45 to 50 parts of an environment-friendly glue are counted.
Further, the stirring speed in the step 2 is 30-35r/min, and the stirring time is 8-10min.
Further, the heat transfer rate of the compression molding machine in the step 4 is 1-1.5 min/mm, the starting temperature of hot molding is 100 ℃, the ending temperature is 150-160 ℃, and the pressure is 2 Mpa.
Compared with the prior art, the invention has the following beneficial effects:
by utilizing the mould pressing preparation process provided by the invention, a large amount of waste can be recycled, and the environment-friendly student desk and stool can be prepared at lower cost; in addition, in the invention, the strength of the prepared finished product is improved by mixing waste scraps with different thicknesses; the specific principle is that the chips with larger meshes can play a role of skeleton support, especially the waste wood residues, and the chips with small meshes can play a role of filling tissues, so that the strength of the finished product is ensured.
Drawings
Fig. 1 is a process flow chart of embodiment 1 of the molding preparation process of the environment-friendly student desk stool of the invention.
Detailed Description
The invention is further described in detail below with reference to the accompanying drawings, and specific embodiments are given.
Example 1:
basically as shown in fig. 1, a mold pressing preparation process of an environment-friendly student desk stool comprises the following steps:
step 1, raw material treatment: crushing various wastes into chips, and sieving the chips through a 40-mesh sieve, wherein the wastes in the embodiment comprise waste books, waste newspapers, waste wood residues and waste stone powder, drying the sieved chips at the temperature of 70-80 ℃, and preparing a plasticizer, an internal release agent and environment-friendly glue.
In the embodiment, the waste chips comprise 100 parts by weight of plasticizer 2 parts by weight of internal release agent 3 parts by weight of internal release agent and 50 parts by weight of environment-friendly glue. The plasticizer in this example is nitrile butadiene rubber.
Step 2 preparation of green compacts: and (3) mixing and stirring the waste scraps, the plasticizer, the release agent and the environment-friendly glue prepared in the step (1) in a stirrer, wherein the stirring speed is 30r/min, and the stirring time is 10min, so that various raw materials are uniformly mixed to obtain a blank.
Step 3, preparing a die: the steel mould in the shape of the desk stool is prepared by utilizing a steel plate, and an external release agent is coated on the surface of the steel mould.
And step 4, compression molding: and (3) filling the blank obtained in the step (2) into the steel die prepared in the step (3), placing the steel die in a die press for hot press molding, wherein the heat transfer rate is 1min/mm, the starting temperature of the hot press molding is 100 ℃, the ending temperature is 160 ℃, the pressure is 2 Mpa, taking the steel die out of the die press after the ending temperature is reached, cooling, and taking down the steel die to obtain the die-pressed environment-friendly student desk stool.
Example 2:
the difference from example 1 is that: a mold pressing preparation process of an environment-friendly student desk stool comprises the following steps:
step 1, raw material treatment: crushing various wastes into chips, and sieving the chips through a 60-mesh sieve, wherein the wastes in the embodiment comprise waste books, waste newspapers, waste wood residues and waste stone powder, drying the sieved chips at the temperature of 70-80 ℃, and preparing a plasticizer, an internal release agent and environment-friendly glue.
In this embodiment, the waste scraps are 100 parts by weight, 3 parts by weight of a plasticizer, 4 parts by weight of an internal mold release agent, and 55 parts by weight of an environment-friendly glue. The plasticizer in this example is a polyamide resin.
Step 2 preparation of green compacts: and (3) mixing and stirring the waste scraps, the plasticizer, the release agent and the environment-friendly glue prepared in the step (1) in a stirrer, wherein the stirring speed is 35r/min, and the stirring time is 8min, so that various raw materials are uniformly mixed to obtain a blank.
Step 3, preparing a die: the steel mould in the shape of the desk stool is prepared by utilizing a steel plate, and an external release agent is coated on the surface of the steel mould.
And step 4, compression molding: and (3) filling the blank obtained in the step (2) into the steel die prepared in the step (3), placing the steel die into a die press for hot press molding, wherein the heat transfer rate is 1.5min/mm, the starting temperature of the hot press molding is 100 ℃, the ending temperature is 150 ℃, the pressure is 2 Mpa, taking the steel die out of the die press after the ending temperature is reached, cooling, and taking off the steel die to obtain the molded environment-friendly student desk stool.
Example 3:
the difference from the embodiment 1 is that the mold pressing preparation process of the environment-friendly student desk stool comprises the following steps:
step 1, raw material treatment: crushing various wastes into chips, and sieving the chips through a 80-mesh sieve, wherein the wastes in the embodiment comprise waste books, waste newspapers, waste wood residues and waste stone powder, drying the sieved chips at the temperature of 70-80 ℃, and preparing a plasticizer, an internal release agent and environment-friendly glue.
In the embodiment, the waste chips comprise 100 parts by weight of plasticizer 4 parts by weight of internal release agent 5 parts by weight of environmental protection glue 45 parts by weight of environmental protection glue. In this example the plasticizer is a polyamide resin.
Step 2 preparation of green compacts: and (3) mixing and stirring the waste scraps, the plasticizer, the release agent and the environment-friendly glue prepared in the step (1) in a stirrer, wherein the stirring speed is 35r/min, and the stirring time is 8min, so that various raw materials are uniformly mixed to obtain a blank.
Step 3, preparing a die: the steel mould in the shape of the desk stool is prepared by utilizing a steel plate, and an external release agent is coated on the surface of the steel mould.
And step 4, compression molding: and (3) filling the blank obtained in the step (2) into the steel die prepared in the step (3), placing the steel die in a die press for hot press molding, wherein the heat transfer rate is 1.5min/mm, the starting temperature of hot press molding is 100 ℃, the ending temperature is 150 ℃, the pressure is 2 Mpa, taking the steel die out of the die press after the ending temperature is reached, cooling, and taking off the steel die to obtain the die-pressed environment-friendly student desk stool.
Example 4:
the difference from the embodiment 1 is that the mold pressing preparation process of the environment-friendly student desk stool comprises the following steps:
step 1, raw material treatment: the method comprises the steps of crushing various wastes into chips, dividing the waste chips into two equal parts, sieving one part of the waste chips through a 40-mesh sieve and sieving the other part of the waste chips through a 60-mesh sieve, and then uniformly mixing the two sieved waste chips, wherein the wastes in the embodiment comprise waste books, waste newspapers, waste wood residues and waste stone powder, drying the sieved chips at the temperature of 70-80 ℃, and preparing a plasticizer, an internal release agent and environment-friendly glue.
In the embodiment, the waste chips comprise 100 parts by weight of plasticizer 4 parts by weight of internal release agent 5 parts by weight of environmental protection glue 45 parts by weight of environmental protection glue. In this example the plasticizer is a polyamide resin.
Step 2 preparation of green compacts: and (2) mixing and stirring the waste scraps, the plasticizer, the release agent and the environment-friendly glue prepared in the step (1) in a stirrer, wherein the stirring speed is 35r/min, and the stirring time is 8min, so that various raw materials are uniformly mixed to obtain a blank.
Step 3, preparing a die: the steel mould in the shape of the desk stool is prepared by utilizing a steel plate, and an external release agent is coated on the surface of the steel mould.
Step 4, compression molding: and (3) filling the blank obtained in the step (2) into the steel die prepared in the step (3), placing the steel die into a die press for hot press molding, wherein the heat transfer rate is 1.5min/mm, the starting temperature of the hot press molding is 100 ℃, the ending temperature is 150 ℃, the pressure is 2 Mpa, taking the steel die out of the die press after the ending temperature is reached, cooling, and taking off the steel die to obtain the molded environment-friendly student desk stool.
Example 5:
a mold pressing preparation process of an environment-friendly student desk stool comprises the following steps:
step 1, raw material treatment: the method comprises the steps of crushing various wastes into chips, dividing the waste chips into two equal parts, sieving one part of the waste chips through a 40-mesh sieve and sieving the other part of the waste chips through a 80-mesh sieve, and then uniformly mixing the two sieved waste chips, wherein the wastes in the embodiment comprise waste books, waste newspapers, waste wood residues and waste stone powder, drying the sieved chips at the temperature of 70-80 ℃, and preparing a plasticizer, an internal release agent and environment-friendly glue.
In the embodiment, the waste chips comprise 100 parts by weight of plasticizer 4 parts by weight of internal release agent 5 parts by weight of environmental protection glue 45 parts by weight of environmental protection glue. The plasticizer in this example is a polyamide resin.
Step 2 preparation of green compacts: and (3) mixing and stirring the waste scraps, the plasticizer, the release agent and the environment-friendly glue prepared in the step (1) in a stirrer, wherein the stirring speed is 35r/min, and the stirring time is 8min, so that various raw materials are uniformly mixed to obtain a blank.
Step 3, preparing a die: the steel mould in the shape of the desk stool is prepared by utilizing a steel plate, and an external release agent is coated on the surface of the steel mould.
Step 4, compression molding: and (3) filling the blank obtained in the step (2) into the steel die prepared in the step (3), placing the steel die into a die press for hot press molding, wherein the heat transfer rate is 1.5min/mm, the starting temperature of the hot press molding is 100 ℃, the ending temperature is 150 ℃, the pressure is 2 Mpa, taking the steel die out of the die press after the ending temperature is reached, cooling, and taking off the steel die to obtain the molded environment-friendly student desk stool.
Example 6:
the difference from the embodiment 1 is that,
a mold pressing preparation process of an environment-friendly student desk stool comprises the following steps:
step 1, raw material treatment: the method comprises the steps of crushing various wastes into chips, dividing the waste chips into three equal parts, wherein the first part is sieved by a 40-mesh sieve, the second part is sieved by a 60-mesh sieve, the third part is sieved by a 80-mesh sieve, and then uniformly mixing the three sieved waste chips, wherein the wastes comprise waste books, waste newspapers, waste wood residues and waste stone powder, drying the sieved chips at 70-80 ℃, and preparing a plasticizer, an internal release agent and environment-friendly glue.
In the embodiment, the waste scraps are 100 parts by weight, 4 parts by weight of a plasticizer, 5 parts by weight of an internal mold release agent and 45 parts by weight of an environment-friendly glue. The plasticizer in this example is a polyamide resin.
Step 2 preparation of green compacts: and (3) mixing and stirring the waste scraps, the plasticizer, the release agent and the environment-friendly glue prepared in the step (1) in a stirrer, wherein the stirring speed is 35r/min, and the stirring time is 8min, so that various raw materials are uniformly mixed to obtain a blank.
Step 3, preparing a die: the steel mould in the shape of the desk stool is prepared by utilizing a steel plate, and an external release agent is coated on the surface of the steel mould.
Step 4, compression molding: and (3) filling the blank obtained in the step (2) into the steel die prepared in the step (3), placing the steel die into a die press for hot press molding, wherein the heat transfer rate is 1.5min/mm, the starting temperature of the hot press molding is 100 ℃, the ending temperature is 150 ℃, the pressure is 2 Mpa, taking the steel die out of the die press after the ending temperature is reached, cooling, and taking off the steel die to obtain the molded environment-friendly student desk stool. .
It should be noted that, in this document, relational terms such as first and second, and the like are only used for distinguishing one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims (8)

1. The mold pressing preparation process of the environment-friendly student desk stool is characterized by comprising the following steps of: the method comprises the following steps:
step 1, raw material treatment: crushing various wastes into chips, sieving the chips with a 40-80 mesh sieve, and preparing a plasticizer, an internal release agent and environment-friendly glue;
step 2 preparation of green compacts: uniformly mixing and stirring the waste scraps prepared in the step 1, the plasticizer, the release agent and the environment-friendly glue to obtain a blank;
step 3, preparing a die: preparing a steel die in the shape of a desk stool by using a steel plate, and coating an external release agent on the surface of the steel die;
and step 4, compression molding: and (3) filling the blank obtained in the step (2) into the steel die prepared in the step (3), placing the steel die into a die press for hot press forming, taking the steel die out of the die press after forming, cooling, and taking off the steel die to obtain the die-pressed environment-friendly student desk stool.
2. The mold pressing preparation process of the environment-friendly student desk stool as claimed in claim 1, wherein the process comprises the following steps: the plasticizer in the step 1 is one of butadiene-acrylonitrile rubber or polyamide resin.
3. The mold pressing preparation process of the environment-friendly student desk stool as claimed in claim 2, wherein the process comprises the following steps: dividing the waste scraps in the step 1 into two equal parts, wherein one part is sieved by a 40-mesh sieve, the other part is sieved by a 60-mesh sieve, and then uniformly mixing the two parts of respectively sieved waste scraps.
4. The mold pressing preparation process of the environment-friendly student desk stool as claimed in claim 2, wherein the mold pressing preparation process comprises the following steps: dividing the waste scraps in the step 1 into two equal parts, wherein one part is sieved by a 40-mesh sieve, the other part is sieved by an 80-mesh sieve, and then uniformly mixing the two parts of respectively sieved waste scraps.
5. The mold pressing preparation process of the environment-friendly student desk stool as claimed in claim 2, wherein the process comprises the following steps: and dividing the waste fragments into three equal parts, wherein the first part is sieved by a 40-mesh sieve, the second part is sieved by a 60-mesh sieve, the third part is sieved by a 80-mesh sieve, and then the three parts of the waste fragments which are respectively sieved are uniformly mixed.
6. The mold pressing preparation process of the environment-friendly student desk stool as claimed in claim 5, wherein the mold pressing preparation process comprises the following steps: in the step 1, by weight, 100 parts of waste scraps, 3 to 4 parts of a plasticizer, 3 to 5 parts of an internal mold release agent and 45 to 50 parts of environment-friendly glue are counted.
7. The mold pressing preparation process of the environment-friendly student desk stool as claimed in claim 6, wherein the process comprises the following steps: and 2, stirring at the speed of 30-35r/min in the step 2, and stirring for 8-10min.
8. The mold pressing preparation process of the environment-friendly student desk stool as claimed in claim 7, wherein the process comprises the following steps: the heat transfer rate of the die pressing machine in the step 4 is 1-1.5 min/mm, the starting temperature of hot die pressing is 100 ℃, the ending temperature is 150-160 ℃, and the pressure is 2 Mpa.
CN202211335618.4A 2022-10-28 2022-10-28 Mold pressing preparation process of environment-friendly student desk and stool Pending CN115519802A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211335618.4A CN115519802A (en) 2022-10-28 2022-10-28 Mold pressing preparation process of environment-friendly student desk and stool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211335618.4A CN115519802A (en) 2022-10-28 2022-10-28 Mold pressing preparation process of environment-friendly student desk and stool

Publications (1)

Publication Number Publication Date
CN115519802A true CN115519802A (en) 2022-12-27

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Application Number Title Priority Date Filing Date
CN202211335618.4A Pending CN115519802A (en) 2022-10-28 2022-10-28 Mold pressing preparation process of environment-friendly student desk and stool

Country Status (1)

Country Link
CN (1) CN115519802A (en)

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