CN112497560A

CN112497560A - Colorful antistatic EPP bead and preparation method thereof

Info

Publication number: CN112497560A
Application number: CN202011355378.5A
Authority: CN
Inventors: 李帅
Original assignee: Jiangsu Sunway New Material Technology Co ltd
Current assignee: Jiangsu Sunway New Material Technology Co ltd
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2021-03-16

Abstract

The invention discloses a colorful antistatic EPP bead and a preparation method thereof, wherein the EPP bead is manufactured by a double-screw extruder, a foaming reaction kettle and dyeing equipment, the dyeing equipment comprises a workbench, supporting legs are fixed at four corners of the bottom of the workbench through bolts, an electric sliding rail is fixed at the central position of the top of the workbench, an electric sliding block is embedded in the inner wall of the electric sliding rail, a bearing plate is arranged at the top of the electric sliding block, an electric telescopic rod is fixed at the top of the bearing plate, a sealing plate is fixed at the piston rod of the electric telescopic rod, a placing box is arranged at the top of the sealing plate, and fixing through grooves distributed at equal intervals penetrate through the top of the placing box. When the pigment is sprayed on the surface of the EPP bead for heating and baking, in order to ensure that the EPP bead is heated uniformly and the raw material is dried more quickly, the EPP bead is suspended above the fixed through groove, so that the contact dead angle is avoided, and the raw material on the surface of the EPP bead can be dried quickly.

Description

Colorful antistatic EPP bead and preparation method thereof

Technical Field

The invention relates to the technical field of EPP beads, in particular to a colorful antistatic EPP bead and a preparation method thereof.

Background

EPP (polypropylene plastic foam material) is novel foam plastic, is a polypropylene plastic foam material, is a high-crystallization polymer/gas composite material with excellent performance, and becomes the environment-friendly novel compression-resistant buffering heat-insulating material with the fastest growth due to unique and superior performance. EPP is also an environment-friendly material, can be recycled and can be naturally degraded without causing white pollution.

Expanded polypropylene is a foam with excellent properties. The EPP has light weight, high strength, good chemical resistance, high temperature resistance and excellent energy absorption characteristics, and the product is green and environment-friendly, so that the EPP is replacing the traditional foam materials and EPS foam plastics in more and more fields. Is widely applied to the civil and aerospace fields of product packaging, transportation and the like.

However, the conventional application fields do not have high requirements on the color of the EPP material. Some electronic packaging products, automotive tool boxes, household appliance cushions, and waterproof foam boards, etc., typically require only foam materials of conventional colors. For example, black, gray, pink, etc., can basically meet the requirements of most fields on color.

With the expansion of EPP product application field and the improvement of product quality and visual management requirements of various industries, the traditional color EPP can not meet the market demand. For example, in the field of children's toys, there is a long history of building blocks, which contribute to the development of children's intelligence, and the exhibition of various shapes and colors is advantageous for children to exert imagination, thereby enabling to develop the creativity of children earlier. However, the EPP product used for building block manufacturing at present has a single color and cannot adapt to the diversified development trend of the current children toys. In the field of aircraft models, the market also requires more and more colors. And most EPP products cannot be made to quickly dry and maintain the surface color of the product intact, so that a lot of time is wasted in the drying process, and the color of the surface of the EPP product can be touched to cause defects without being completely dried in the production process.

Disclosure of Invention

Based on the technical problems in the background art, the invention provides a colorful antistatic EPP bead and a preparation method thereof.

The invention provides a colorful antistatic EPP bead and a preparation method thereof, wherein the EPP bead is manufactured by a double-screw extruder, a foaming reaction kettle and dyeing equipment, the dyeing equipment comprises a workbench, four corners of the bottom of the workbench are all fixed with supporting legs through bolts, an electric slide rail is fixed at the center of the top of the workbench, an electric slide block is embedded in the inner wall of the electric slide rail, a bearing plate is arranged at the top of the electric slide block, an electric telescopic rod is fixed at the top of the bearing plate, a sealing plate is fixed at the piston rod of the electric telescopic rod, a placing box is arranged at the top of the sealing plate, fixing through grooves distributed at equal intervals are arranged at the top of the placing box in a penetrating manner, strip-shaped partition plates distributed at equal intervals are welded in the strip-shaped partition plates, and the strip-shaped partition plates divide the interior of the strip, first plenum chamber one side inner wall all is connected with same first intake pipe, and second plenum chamber one side inner wall all is connected with same second intake pipe, first intake pipe and second intake pipe middle part are all to pressing from both sides and are installed automatically controlled valve, and workstation top one end outer wall is fixed with the mount, the mount has the dyeing room through the bolt fastening, and the dyeing room top runs through and is provided with first spray tube and second spray tube, dyeing room both sides inner wall all is fixed with electric heating wire, and workstation top other end outer wall is fixed with the storage box, storage box one side outer wall is opened there is the slot, and the slot inner wall is pegged graft and is had the picture peg, the through-hole that has the equidistance to distribute is all opened to storage box bottom inner wall and picture peg, and the through-hole of storage box and picture peg is.

Preferably, fixed logical groove top and bottom are the arc structure, and fixed logical groove middle part inner wall is opened has two symmetric distribution's exhaust hole, the exhaust hole sets up along slope top direction.

Preferably, the first spraying pipe is externally connected with a first pump, the first pump is placed inside the pigment chamber, the second spraying pipe is externally connected with a second pump, and the second pump is placed inside the antistatic raw material chamber.

Preferably, the size of the inner wall of the slot is matched with that of the plug board, and the slot and the plug board form plug fit.

Preferably, workstation one side outer wall is fixed with the PLC controller, and the PLC controller is connected with electric slide rail, electronic slider, electric telescopic handle, automatically controlled valve and electric heating wire through the wire, the PLC controller is connected with external power source through the wire.

Preferably, the size of the inner wall of the electric sliding rail is matched with the size of the electric sliding block, and the electric sliding rail is in sliding fit with the electric sliding block.

A colorful antistatic EPP bead and a preparation method thereof comprise the following steps:

s1: dividing the raw materials into the same weight in the same metering unit, pouring 100 parts of polypropylene resin raw materials, 1-2 parts of stabilizing agent and 0.5-1.5 parts of foaming agent into a high-speed mixer, uniformly mixing, extruding by using a double-screw extruder, cutting into granules to obtain EPP foaming master batches, and packaging for later use;

s2: mixing the prepared polypropylene particles with a certain proportion of water, putting the mixture into a foaming reaction kettle, and heating and pressurizing to ensure that the polypropylene particles absorb a large amount of gas at high temperature and high pressure;

s3: pre-pressing the EPP beads obtained in the step S2, injecting the EPP beads into a forming machine, carrying out hot forming by using steam, carrying out water cooling, demoulding, and putting the EPP beads into a drying room for carrying out timed hot forming to obtain an EPP forming body;

s4: placing the EPP formed body obtained in the S3 into a storage box, moving a placing box to the bottom of the storage box, drawing an inserting plate to enable EPP beads to fall into a fixed through groove of the placing box, and moving the placing box to the dyeing chamber;

s5: let the required color pigment spraying of first spray tube spraying, then let first intake pipe connect outside air pump and slowly blow, let the EPP bead roll to start electric heating wire and toast pigment, let second spray tube spraying antistatic material after toasting finishing, let EPP bead surface shaping film, later take out and put the box, let first intake pipe and second intake pipe jet-propelled simultaneously, take out the EPP bead fast.

Preferably, the polypropylene particles obtained in S2 are put into a foaming kettle, heated and pressurized until the foaming temperature is 140-160 ℃ and the foaming pressure is 1.6-3.4MPa, and then instantaneously released to the atmospheric pressure, so as to obtain the EPP beads.

Preferably, the absorbed gas in step S2 is air, nitrogen, oxygen, carbon dioxide or water vapor.

Preferably, the EPP beads may be suspended above the fixed through slots by the gas ejected from the first gas inlet pipe in the step S5, and the EPP beads may rotate slowly.

The invention has the beneficial effects that:

1. when the manufactured EPP beads are placed in the storage box, the inserting plate and the through holes at the bottom of the storage box are positioned on the same straight line by drawing the inserting plate, so that the EPP beads quickly fall into the fixed through grooves, the time wasted by placing a large amount of EPP beads in the past can be saved, the operation is simple, and the working efficiency is improved;

2. when the EPP beads are placed on the fixed through grooves and the pigment is sprayed on the surfaces of the EPP beads for heating and baking, in order to enable the EPP beads to be heated uniformly and enable the raw materials to be dried more quickly, the EPP beads are suspended above the fixed through grooves, so that dead contact angles are avoided, and the raw materials on the surfaces of the EPP beads can be dried quickly;

3. after the EPP beads are adhered with the raw materials, the antistatic film is sprayed again, static electricity can be prevented, pigments on the surfaces of the EPP beads can be protected, the pigments are prevented from falling off, air is introduced into the first air inlet pipe and the second air inlet pipe simultaneously after preparation is finished, a large number of EPP beads can be taken out of the placing box quickly, a large number of taking time is saved, and working efficiency is improved.

Drawings

FIG. 1 is a cross-sectional view of the overall structure of a multi-colored antistatic EPP bead and a method for preparing the same according to the present invention;

FIG. 2 is a front view of the overall structure of a multi-colored antistatic EPP bead and a method for preparing the same according to the present invention;

FIG. 3 is a schematic structural view of a placing box for the colorful antistatic EPP beads and the preparation method thereof according to the present invention;

fig. 4 is a structural cross-sectional view of a placing box of the colorful antistatic EPP bead and the preparation method thereof.

In the figure: 1 workstation, 2 supporting legs, 3 electronic slide rail, 4 electronic slider, 5 electric telescopic handle, 6 sealing plates, 7 are put the box, 8 fixed logical grooves, 9 bar baffles, 10 first plenum chambers, 11 second plenum chambers, 12 exhaust holes, 13 first intake pipe, 14 second intake pipes, 15 automatically controlled valves, 16 mounts, 17 dyeing room, 18 first spray pipe, 19 second spray pipe, 20 electric heating wire, 21 storage boxes, 22 slots, 23 picture peg, 24 through-holes, 25PLC controller.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-4, a colorful antistatic EPP bead and a preparation method thereof, the EPP bead is manufactured by a double screw extruder, a foaming reaction kettle and a dyeing device, the dyeing device comprises a workbench 1, four corners of the bottom of the workbench 1 are all fixed with supporting legs 2 through bolts, an electric slide rail 3 is fixed at the central position of the top of the workbench 1, an electric slide block 4 is embedded in the inner wall of the electric slide rail 3, a bearing plate is arranged at the top of the electric slide block 4, the size of the inner wall of the electric slide rail 3 is matched with the size of the electric slide block 4, the electric slide rail 3 is in sliding fit with the electric slide block 4, an electric telescopic rod 5 is fixed at the top of the bearing plate, a sealing plate 6 is fixed at the piston rod of the electric telescopic rod 5, a placing box 7 is arranged at the top of the sealing plate 6, fixing through grooves 8 are arranged at equal intervals, the strip-shaped partition board 9 divides the interior of the strip-shaped partition board 9 into a plurality of first inflation chambers 10 and second inflation chambers 11 which are distributed equidistantly, the top and the bottom of the fixed through groove 8 are both arc-shaped structures, the inner wall of the middle part of the fixed through groove 8 is provided with two exhaust holes 12 which are symmetrically distributed, the exhaust holes 12 are arranged along the inclined upward direction, the inner wall of one side of the first inflation chamber 10 is connected with a same first air inlet pipe 13, the inner wall of one side of the second inflation chamber 11 is connected with a same second air inlet pipe 14, the middle parts of the first air inlet pipe 13 and the second air inlet pipe 14 are oppositely clamped with an electric control valve 15, the outer wall of one end of the top part of the workbench 1 is fixed with a fixing frame 16, the fixing frame 16 is fixed with a dyeing chamber 17 through bolts, the top part of the dyeing chamber 17 is provided with a first spraying pipe 18 and a second, a second pump is connected with the outside of the second spraying pipe 19 and is arranged in the antistatic raw material chamber, a PLC (programmable logic controller) 25 is fixed on the outer wall of one side of the workbench 1, and the PLC 25 is connected with the electric slide rail 3, the electric slide block 4, the electric telescopic rod 5, the electric control valve 15 and the electric heating wire 20 through wires, the PLC 25 is connected with an external power supply through wires, the electric heating wires 20 are fixed on the inner walls of the two sides of the dyeing chamber 17, and the outer wall of the other end of the top of the workbench 1 is fixed with a storage box 21, the outer wall of one side of the storage box 21 is provided with an inserting groove 22, and the inner wall of the slot 22 is inserted with an inserting plate 23, the size of the inner wall of the slot 22 is matched with the size of the inserting plate 23, and the slot 22 and the plugboard 23 form a splicing fit, through holes 24 are distributed at equal intervals on the inner wall of the bottom of the storage box 21 and the plugboard 23, and the through holes 24 of the storage box 21 and the plugboard 23 are not positioned on the same vertical line.

s1: dividing the raw materials into 100 parts by weight, 1-2 parts by weight of a stabilizer and 0.5-1.5 parts by weight of a foaming agent by taking the same weight as the same metering unit, pouring the raw materials into a high-speed mixer, uniformly mixing, extruding by using a double-screw extruder, cutting into granules to obtain EPP foaming master batches, and packaging for later use.

S2: mixing the prepared polypropylene particles with a certain proportion of water, putting the mixture into a foaming reaction kettle, heating and pressurizing to enable the polypropylene particles to absorb a large amount of gas at high temperature and high pressure, putting the polypropylene particles obtained in the step S2 into the foaming kettle, heating and pressurizing until the foaming temperature is 140 plus one year of temperature and the foaming pressure is 1.6-3.4MPa, and then instantly releasing the foaming temperature to atmospheric pressure to obtain EPP beads, wherein the gas absorbed in the step S2 is air, nitrogen, oxygen, carbon dioxide or water vapor.

S3: and (3) prepressing the EPP beads obtained in the step (S2), injecting the EPP beads into a forming machine, carrying out hot forming by using steam, carrying out water cooling, demoulding, and putting the EPP beads into a drying room for carrying out timed hot forming to obtain an EPP formed body.

S4: the EPP molded body obtained in S3 is put into the storage box 21, the holding box 7 is moved to the bottom of the storage box 21, the inserting plate 23 is pulled to drop the EPP beads into the fixing through grooves 8 of the holding box 7, and then the holding box 7 is moved to the dyeing chamber 17.

S5: let first spray pipe 18 spray the required colored pigment spraying, then let first intake pipe 13 connect the outside air pump and slowly blow, let the EPP bead roll, and start electric heating wire 20 and toast the pigment, it is antistatic raw materials to let second spray pipe 19 spray after finishing to toast, let EPP bead surface shaping film, later take out and put box 7, let first intake pipe 13 and second intake pipe 14 jet-propelled simultaneously, take out the EPP bead fast, first intake pipe 13 spun gas can make EPP bead suspension and fixed logical groove 8 top in step S5, and the EPP bead can be slow rotatory.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A colorful antistatic EPP bead and a preparation method thereof, the EPP bead is manufactured by a double-screw extruder, a foaming reaction kettle and dyeing equipment, and is characterized in that the dyeing equipment comprises a workbench (1), supporting legs (2) are fixed at four corners of the bottom of the workbench (1) through bolts, an electric sliding rail (3) is fixed at the central position of the top of the workbench (1), an electric sliding block (4) is embedded in the inner wall of the electric sliding rail (3), a bearing plate is arranged at the top of the electric sliding block (4), an electric telescopic rod (5) is fixed at the top of the bearing plate, a sealing plate (6) is fixed at the piston rod of the electric telescopic rod (5), a placing box (7) is installed at the top of the sealing plate (6), fixing through grooves (8) distributed at equal intervals are arranged at the top of the placing box (7) in a penetrating manner, and strip-shaped partition plates (9) distributed at equal, and the bar baffle (9) divides the interior of the bar baffle (9) into a plurality of first air charging chambers (10) and second air charging chambers (11) which are distributed equidistantly, the inner wall of one side of the first air charging chamber (10) is connected with a same first air inlet pipe (13), the inner wall of one side of the second air charging chamber (11) is connected with a same second air inlet pipe (14), the middle parts of the first air inlet pipe (13) and the second air inlet pipe (14) are oppositely clamped and provided with an electric control valve (15), the outer wall of one end of the top of the workbench (1) is fixed with a fixing frame (16), the fixing frame (16) is fixed with a dyeing chamber (17) through bolts, the top of the dyeing chamber (17) is provided with a first spraying pipe (18) and a second spraying pipe (19) in a penetrating way, the inner walls of two sides of the dyeing chamber (17) are both fixed with electric heating wires (20), and the, storage box (21) one side outer wall is opened there are slot (22), and slot (22) inner wall is pegged graft and is had picture peg (23), storage box (21) bottom inner wall and picture peg (23) all open through-hole (24) that have the equidistance and distribute, and through-hole (24) of storage box (21) and picture peg (23) are not located same vertical line.

2. A colorful antistatic EPP bead and a preparation method thereof as claimed in claim 1, wherein the top and bottom of the fixing through groove (8) are both arc-shaped structures, and the inner wall of the middle part of the fixing through groove (8) is provided with two symmetrically distributed exhaust holes (12), the exhaust holes (12) are arranged along the inclined upward direction.

3. A multicolored antistatic EPP bead and method for making same as claimed in claim 1, wherein said first spray pipe (18) is externally connected with a first pump and said first pump is placed inside said paint chamber, said second spray pipe (19) is externally connected with a second pump and said second pump is placed inside said antistatic material chamber.

4. A colorful antistatic EPP bead and its preparation method as claimed in claim 1, wherein the size of the inner wall of the slot (22) is adapted to the size of the insert plate (23), and the slot (22) and the insert plate (23) form a plug-in fit.

5. The colorful antistatic EPP bead and the preparation method thereof according to claim 1, wherein a PLC (programmable logic controller) is fixed on the outer wall of one side of the workbench (1), the PLC (25) is connected with an electric slide rail (3), an electric slide block (4), an electric telescopic rod (5), an electric control valve (15) and an electric heating wire (20) through wires, and the PLC (25) is connected with an external power supply through wires.

6. A colorful antistatic EPP bead and a preparation method thereof as claimed in claim 1, wherein the size of the inner wall of the electric slide rail (3) is adapted to the size of the electric slide block (4), and the electric slide rail (3) and the electric slide block (4) form a sliding fit.

7. The colorful antistatic EPP bead and the preparation method thereof according to claim 1, characterized by comprising the following steps:

s4: placing the EPP formed body obtained in the S3 into a storage box (21), then moving a placing box (7) to the bottom of the storage box (21), drawing an inserting plate (23) to enable EPP beads to fall into a fixing through groove (8) of the placing box (7), and then moving the placing box (7) into a dyeing chamber (17);

s5: let first spray tube (18) spraying required color pigment spraying, then let first intake pipe (13) connect outside air pump and slowly blow, let the EPP bead roll, and start electric heating wire (20) and toast pigment, it sprays antistatic raw materials to let second spray tube (19) after toasting to finish, let EPP bead surface shaping film, later take out and put box (7), let first intake pipe (13) and second intake pipe (14) jet-propelled simultaneously, take out the EPP bead fast.

8. The colorful antistatic EPP bead and the preparation method thereof as claimed in claim 7, wherein the polypropylene particles obtained from S2 are put into a foaming kettle, heated and pressurized to a foaming temperature of 140-160 ℃ and a foaming pressure of 1.6-3.4MPa, and then instantaneously released to atmospheric pressure to obtain the EPP bead.

9. The colorful antistatic EPP bead and the preparation method thereof according to claim 7, wherein the gas absorbed in step S2 is air, nitrogen, oxygen, carbon dioxide or water vapor.

10. A colorful antistatic EPP bead and its preparation method according to claim 7, wherein the gas injected from the first gas inlet pipe (13) in the step S5 can suspend the EPP bead above the fixed through slot (8), and the EPP bead can rotate slowly.