CN111483105A

CN111483105A - EPS foam material forming device and process

Info

Publication number: CN111483105A
Application number: CN202010326439.9A
Authority: CN
Inventors: 夏西亮; 黄培沛; 徐文涛; 张剑锋; 方凌云; 章义来
Original assignee: Hefei Rongfeng Packaging Products Co ltd
Current assignee: Hefei Rongfeng Packaging Products Co ltd
Priority date: 2020-04-23
Filing date: 2020-04-23
Publication date: 2020-08-04
Anticipated expiration: 2040-04-23
Also published as: CN111483105B

Abstract

The invention relates to an EPS foam material, and discloses an EPS foam material forming device and a process, wherein the EPS foam material forming device comprises a material reaction device, and comprises the following steps: step one, pre-foaming the polystyrene resin, step two, curing, and conveying the pre-foamed EPS beads into a curing bin for curing; and step three, molding treatment, namely extracting the cured EPS beads to a molding machine, then filling the molding machine with the EPS beads, and introducing steam to expand the EPS beads to obtain a molded product. According to the invention, the polystyrene resin is subjected to antistatic treatment by using the specially designed reaction device, so that the finally prepared EPS foam material has more lasting and efficient antistatic performance compared with the existing product.

Description

EPS foam material forming device and process

Technical Field

The invention relates to an EPS foam material, in particular to an EPS foam material forming device and process.

Background

The EPS foam material is a dismantling material for producing EPS foam packaging products, has the functions of buffering and shock absorption, and simultaneously has the functions of heat preservation and heat insulation, is a high-quality packaging protection material at present, and is widely applied to industries such as household appliances, electronics, machinery, artware, medicines, buildings, decoration and the like.

The whole forming process of the EPS foam material during preparation generally comprises the steps of raw material preparation, pre-foaming treatment, curing treatment, forming treatment and the like, and the whole forming device system needs various devices to complete, such as a pre-foaming machine in a pre-foaming stage, a curing bin in a curing stage, a forming machine in a forming stage and the like.

Currently, for EPS foam materials, the preparation stage of raw materials for preparation is generally only simple treatment, and because the EPS foam materials have better electrical insulation performance, the antistatic function of the EPS foam materials is rarely considered in the pretreatment process. However, the EPS product has a low conductivity, so that the self-charging phenomenon is easily generated in friction, and the EPS product does not affect general user products, but the EPS product with antistatic property becomes necessary for high-precision electronic products, especially large-scale integrated block structural elements of modern electric appliances.

Disclosure of Invention

The invention provides a preparation method of long-term antistatic foamed polyethylene, aiming at the problems of foamed polyethylene in the prior art.

In order to solve the technical problem, the invention is solved by the following technical scheme:

EPS foam material forming device, including material reaction unit, material reaction unit is including the inside reaction casing that is equipped with the reaction chamber, the middle part of the lateral surface of the last roof of reaction casing is fixed with bottom and the inside intercommunication of reaction chamber, upper end open-ended is cylindric first connecting seat, the middle part of the medial surface of the last roof of reaction casing is fixed with the relative setting of first connecting seat and the equal open-ended second connecting seat that is in both ends from top to bottom, still including setting up in first connecting seat and can follow the slip post of first connecting seat inner wall lapse to second connecting seat, the upper end of slip post just is located and is equipped with the annular flange on the lateral wall of slip post, the inside of first connecting seat just is located the upper and lower both ends of first connecting seat and is equipped with respectively can form sealed first sealed face and the sealed face of second with the upper and lower surface formation of annular flange, just the lower extreme that is located the second connecting seat on the inside wall of second connecting seat is equipped with can form sealed ring with the bottom surface A form seal flange; inside material chamber that is equipped with of slip post, be equipped with the material through-hole with the outside intercommunication of slip post on the material chamber lateral wall, be equipped with the material export with the inside intercommunication of reaction chamber on the lateral wall of second connecting seat, be fixed with all with the inlet pipe and the intake pipe of the inside intercommunication of material chamber on the up end of slip post, establish the feed switch valve on the inlet pipe, establish gas switch valve in the intake pipe, two adjacent inlet channels are equipped with to the intake pipe inside, all be equipped with the admission valve on two inlet channels.

Preferably, the reaction device further comprises a driving mechanism fixed on the upper top plate of the reaction shell, the driving mechanism comprises a mounting seat fixed on the upper top plate of the reaction shell, the mounting seat comprises four supporting rods which extend upwards and are fixed on the upper top plate, a mounting plate is fixed at the upper end of each supporting rod, a driving cylinder is fixed on the mounting plate, a piston rod of each driving cylinder can extend downwards, and the end part of the piston rod is connected with the sliding column.

Preferably, a pressure adjusting mechanism is arranged between a piston rod of the driving cylinder and the sliding column, the pressure adjusting mechanism comprises an adjusting seat, the upper end of the adjusting seat is fixed at the end of the piston rod, a screw rod extending downwards is fixed in the adjusting seat, a threaded plate is connected to the screw rod in a threaded manner, a connecting column is fixed on the upper end face of the sliding column, the upper end of the connecting column is inserted into the adjusting seat, and an annular plate is arranged on the outer side wall of the insertion part of the connecting column, an adjusting spring located inside the adjusting seat is arranged between the annular plate and the threaded plate, the adjusting spring abuts against the annular plate on the lower bottom surface of the adjusting seat, an adjusting hole for inserting the connecting column is formed in the lower bottom surface of the adjusting. The pressure regulating mechanism can effectively regulate the reaction pressure in the reaction cavity, so that the safety of the whole reaction device is ensured.

Preferably, the screw rods in the adjusting seat and the connecting columns fixed on the sliding columns are two, and the screw rods and the connecting columns are arranged in a one-to-one up-and-down corresponding mode.

Preferably, be equipped with the feed inlet on the terminal surface of inlet pipe, the feed switch valve sets up in feed inlet department, and the feed switch valve includes the base, and the base is fixed on the inlet pipe, still including setting up in the feed inlet and being connected the feed cover that is used for sealing the feed inlet through electro-magnet and base. The feed inlet can be opened as required fast through the setting of electro-magnet, can set up the on-off switch of electro-magnet on sliding column upper surface, the operation of being convenient for.

As preferred, the base middle part is equipped with the disappointing pipe, the inside disappointing passageway that communicates with the inlet pipe is formed to disappointing pipe, disappointing pipe connects on the base inside wall through many connecting rods, the feed cover middle part is equipped with be the shoulder hole form and with the corresponding disappointing hole of disappointing passageway, the downthehole sealing plug that is equipped with loses heart, the tip is equipped with and is annular flange portion on the sealing plug, form sealedly between the lower surface of flange portion and the ladder surface in disappointing hole, the lower tip of sealing plug stretches into in losing heart passageway and is fixed with and can follow the gliding spring mounting board from top to bottom of disappointing intraductal wall, be equipped with the spring that loses heart between spring mounting board and the feed cover, be equipped with. Thereby can guarantee no matter be reaction chamber or material intracavity homoenergetic safety pressure release to adopt the mode of this kind of dual pressure release, can effectively increase pressure release efficiency, guarantee whole reaction unit's security performance.

Preferably, a spring column with external threads on the outer surface is fixed on the spring mounting plate, an adjusting nut is connected to the spring column in a threaded manner, and the lower end of the air leakage spring abuts against the pressure adjusting nut. The pressure of the air leakage spring can be further adjusted through the adjusting nut, then the air leakage pressure is adjusted, and the air leakage pressure in the material cavity and the reaction cavity can be adjusted to be consistent.

The EPS foam material forming process adopts the EPS foam material forming device and comprises the following steps:

step one, carrying out pretreatment on polystyrene resin, and specifically comprising the following steps:

placing polystyrene resin into a reaction cavity of a material reaction device, introducing CO2 into the reaction cavity of the material reaction device through a CO2 air inlet channel of an air inlet pipe, and adding an antistatic agent into the reaction cavity through an inlet pipe to obtain modified EPS beads;

the method comprises the following steps of mixing titanate and calcium carbonate powder according to the mass ratio of 1: 3, adding the mixture into a high-speed mixer for mixing, preserving the heat for 1-2h at the temperature of 100-120 ℃, then adding neodymium oxide, and stirring for 0.5-1h at the temperature of 80-90 ℃ to obtain a mixed solution;

adding organic siloxane with the mole number of 0.1-3.0 into the mixed solution according to the volume ratio of 1: 2;

adding modified EPS beads into the mixed solution, heating to 200-250 ℃, stirring for 0.5-1h, adding sodium propylamine and acetylene carbon black, continuously mixing for 30min at the temperature of 100-120 ℃, then adding a silane coupling agent and carbon fibers, and heating and uniformly mixing at the temperature of 150-200 ℃ to obtain a modified EPS bead mixture;

step two, carrying out curing treatment, namely conveying the pre-foamed modified EPS bead mixture into a curing bin for curing;

and step three, molding treatment, namely extracting the cured modified EPS bead mixture to a molding machine, then filling the molding machine into a mold, and introducing steam to expand the EPS beads to obtain a molded product.

Preferably, the specific steps of the steps are as follows: placing polystyrene resin into a reaction cavity of a material reaction device, introducing CO2 into the reaction cavity of the material reaction device through a CO2 air inlet channel of an air inlet pipe, and dividing the reaction into three stages of reactions, wherein the first reaction stage is to adjust the pressure inside the reaction cavity of the material reaction device to be 2-4MPa and the temperature to be 60-80 ℃ and keep the reaction for 30min, the second reaction stage is to adjust the pressure inside the reaction cavity of the material reaction device to be 4-6MPa and the temperature to be 80-100 ℃ and keep the reaction for 30min, and an antistatic agent is added into the reaction cavity through a feeding pipe; the third reaction stage is to adjust the interior of the reaction cavity of the material reaction device to the pressure of 6-10MPa and the temperature of 100-120 ℃ and keep the temperature for 30min to finally obtain the modified polystyrene resin, and carbon black is added through a feeding pipe at the stage. The antistatic performance and other performances of the polystyrene resin can be effectively improved by a staged pre-foaming mode.

Preferably, the antistatic agent in step (a) is dodecyl dihydroxypropyl methyl sulfate.

Due to the adoption of the technical scheme, the invention has the remarkable technical effects that:

according to the invention, the polystyrene resin is subjected to antistatic treatment by using the specially designed reaction device, so that the finally prepared EPS foam material has more lasting and efficient antistatic performance compared with the existing product.

Drawings

Fig. 1 is a schematic structural view of embodiment 1 of the present invention.

Fig. 2 is a sectional view of fig. 1.

Fig. 3 is a partially enlarged view of a portion a in fig. 2.

Fig. 4 is another sectional view in the direction of fig. 1.

Fig. 5 is a partially enlarged view of a portion a in fig. 4.

Fig. 6 is a cross-sectional view of the feed tube of fig. 1.

Fig. 7 is a partially enlarged view of a portion a in fig. 6.

The names of the parts indicated by the numerical references in the drawings are as follows: 101-reaction chamber, 102-reaction shell, 103-first connecting seat, 104-second connecting seat, 105-sliding column, 106-annular flange, 107-first sealing surface, 108-second sealing surface, 109-annular sealing flange, 110-material cavity, 111-material through hole, 112-material outlet, 113-feeding pipe, 114-air inlet pipe, 115-material switch valve, 116-air inlet channel, 117-mounting seat, 118-supporting rod, 119-mounting plate, 120-driving cylinder, 121-adjusting seat, 122-screw, 123-thread plate, 124-connecting column, 125-annular plate, 126-adjusting spring, 127-base, 128-electromagnet, 129-feeding cover, 130-air release pipe, 131-air release channel, 132-sealing plug, 133-spring mounting plate, 134-air release spring, 135-annular baffle, 136-spring column.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Example 1

An EPS foam material forming device, as shown in fig. 1-7, comprises a material reaction device, the material reaction device comprises a reaction housing 102 having a reaction chamber 101 therein, a first cylindrical connecting seat 103 having an open upper end and a bottom end communicated with the interior of the reaction chamber 101 is fixed in the middle of the outer side surface of the upper top plate of the reaction housing 102, a second cylindrical connecting seat 104 opposite to the first connecting seat 103 and having both open upper and lower ends is fixed in the middle of the inner side surface of the upper top plate of the reaction housing 102, a sliding column 105 disposed in the first connecting seat 103 and capable of sliding downwards into the second connecting seat 104 along the inner wall of the first connecting seat 103, an annular flange 106 is disposed on the outer side wall of the sliding column 105 at the upper end of the sliding column 105, a first sealing surface 107 and a second sealing surface 108 capable of forming a seal with the upper and lower surfaces of the annular flange 106 are respectively disposed in the first connecting seat 103 and at the upper and lower ends of the first connecting seat 103, an annular sealing flange 109 capable of forming a seal with the lower bottom surface of the sliding column 105 is arranged on the inner side wall of the second connecting seat 104 and positioned at the lower end of the second connecting seat 104; inside material chamber 110 that is equipped with of slip post 105, be equipped with the material through-hole 111 with the outside intercommunication of slip post 105 on the material chamber 110 lateral wall, be equipped with on the lateral wall of second connecting seat 104 with the inside material outlet 112 that communicates of reaction chamber 101, be fixed with on the up end of slip post 105 all with inlet pipe 113 and the intake pipe 114 of the inside intercommunication of material chamber 110, establish the feeding ooff valve on inlet pipe 113, establish the gas switch valve on the intake pipe 114, two adjacent inlet channel 116 are equipped with to intake pipe 114 inside, all be equipped with the admission valve on two inlet channel 116.

In this embodiment, a feed inlet is formed in an end surface of the feed pipe 113, the feed switch valve is disposed at the feed inlet, the feed switch valve includes a base 127, the base 127 is fixed on the feed pipe 113, and the feed switch valve further includes a feed cover 129 disposed in the feed inlet and connected to the base 127 through an electromagnet 128 for closing the feed inlet. The two air inlet channels 116 of the air inlet pipe 114 are respectively connected with the CO2 air inlet pipe 114 and the steam air inlet pipe 114 through two air inlet valves, so that one gas or two gases can be selectively introduced into the air inlet channels 116 to meet the requirements in the reaction chamber 101. Under the normal operating condition of the feeding switch valve in the reaction chamber 101, the feeding cover 129 is in a state of closing the feeding port under the action of the electromagnet 128, namely, the feeding switch valve is in a closed state, only when the reaction chamber 101 needs to be charged with materials, the electromagnet 128 is controlled to be powered off, the feeding cover 129 is opened, and the materials can be charged into the feeding pipe 113 at the moment.

The embodiment further comprises a driving mechanism fixed on the upper top plate of the reaction shell 102, the driving mechanism comprises a mounting seat 117 fixed on the upper top plate of the reaction shell 102, the mounting seat 117 comprises four support rods 118 extending upwards and fixed on the upper top plate, the upper ends of the support rods 118 are fixed with a mounting plate 119, a driving cylinder 120 is fixed on the mounting plate 119, a piston rod of the driving cylinder 120 can extend downwards, and the end part of the piston rod is connected with the sliding column 105.

The driving cylinder 120 can drive the sliding column 105 to slide up and down in the first connecting seat 103 and the second connecting seat 104 through the piston rod.

Before or during the reaction inside the reaction chamber 101, the pressure and the temperature in the reaction chamber 101 need to be adjusted to corresponding values, but during the reaction, the material needs to be added, which may cause the pressure or the temperature in the reaction chamber 101 to change, so that the temperature and the pressure in the reaction chamber 101 are not affected during the material adding process by moving the sliding column 105 to different positions.

When the materials are required to be put into the reaction cavity 101, the feeding switch valve is opened, the feeding pipe 113 is communicated with the material cavity 110 inside the sliding column 105 at this time, the whole sliding column 105 is positioned at the lowest end under the action of the driving cylinder 120, the lower surface of the annular flange 106 and the second sealing surface 108 form sealing at this time, the lower surface of the sliding column 105 and the annular sealing flange 109 on the second connecting seat 104 form sealing, and the material through hole 111 on the side wall of the material cavity 110 is positioned below the material outlet 112 on the second connecting seat 104, and the two are not opposite. In this case, although the feed pipe 113 is connected to the material chamber 110, the material chamber 110 is not connected to the reaction chamber 101.

When the material needs to be put into the reaction cavity 101 from the material cavity 110, the sliding column 105 is moved upwards by the driving mechanism, so that the material outlet 112 is opposite to the material through hole 111, and at this time, the annular flange 106 and the first connecting seat 103 cannot be sealed, so that a small amount of gas in the reaction cavity 101 escapes from a gap between the sliding column 105 and the first connecting seat 103, and the temperature and the pressure in the reaction cavity 101 are changed, therefore, the gas in the reaction cavity 101 needs to be supplemented by introducing the gas into the material cavity 110 through the gas inlet pipe 114, and the material in the material cavity 110 can be blown out of the material cavity 110 while the gas is introduced, so that the material can smoothly enter the reaction cavity 101.

When gas needs to be input, the feeding pipe 113 is in a closed state at this time, so that the sliding column 105 is at the uppermost end under the action of the driving cylinder 120, at this time, the upper surface of the annular flange 106 forms a seal with the first sealing surface 107, and the gas enters the gap between the sliding column 105 and the first connecting column 124 through the material through hole 111 and then enters the inside of the reaction chamber 101 through the second connecting seat 104.

In this embodiment, a pressure adjusting mechanism is disposed between the piston rod of the driving cylinder 120 and the sliding column 105, the pressure adjusting mechanism includes an adjusting seat 121 having an upper end fixed to an end of the piston rod, a screw 122 extending downward is fixed in the adjusting seat 121, a threaded plate 123 is screwed on the screw 122, a connecting column 124 is fixed on an upper end surface of the sliding column 105, an upper end of the connecting column 124 is inserted into the adjusting seat 121, and an annular plate 125 is disposed on an outer sidewall of an insertion portion of the connecting column 124, an adjusting spring 126 located inside the adjusting seat 121 is disposed between the annular plate 125 and the threaded plate 123, the adjusting spring 126 tightly presses the annular plate 125 against a lower bottom surface of the adjusting seat 121, an adjusting hole for inserting the connecting column 124 is disposed on a lower bottom surface of the adjusting seat 121, and the connecting column 124 can slide upward along. The screw 122 in the adjusting seat 121 and the connecting column 124 fixed on the sliding column 105 are both two, and the screw 122 and the connecting column 124 are arranged in a one-to-one up-and-down correspondence.

When the sliding column 105 moves to the lowest part of the first connecting seat 103, a seal is formed between the lower surface of the sliding column 105 and the annular sealing flange 109 on the second connecting seat 104, the sliding column 105 is pushed to overcome the elastic force of the adjusting spring 126 and move upwards when the pressure in the reaction chamber 101 is too high, so that the gas in the reaction chamber 101 can flow out through the gap between the sliding column 105 and the first connecting seat 103, the pressure relief effect is achieved, the protection effect on the pressure in the reaction chamber 101 is achieved, and the pressure balance in the reaction chamber 101 is ensured. When different pressures are required to be in the reaction chamber 101, the compression amount of the pressure regulating spring is regulated by regulating the position of the threaded plate 123 on the threaded rod 122, and then the pressure relief of different pressures can be realized.

Base 127 middle part is equipped with disappointing pipe 130 in this embodiment, the inside disappointing passageway 131 that communicates with the inlet pipe 113 inside that forms of disappointing pipe 130, disappointing pipe 130 connects on the base 127 inside wall through many connecting rods, feeding lid 129 middle part is equipped with be the shoulder hole form and with the corresponding disappointing hole of disappointing passageway 131, the downthehole sealing plug 132 that is equipped with loses heart, sealing plug 132 upper end is equipped with and is annular flange portion, form sealedly between the lower surface of flange portion and the ladder surface of disappointing hole, the lower tip of sealing plug 132 stretches into in losing heart passageway 131 and is fixed with the spring mounting plate 133 that can follow disappointing pipe 130 inner wall and slide from top to bottom, be equipped with between spring mounting plate 133 and the feeding lid 129 and lose heart spring 134, be equipped with annular baffle 135 on losing heart 130 inner wall, it supports.

A spring column 136 with external threads on the outer surface is fixed on the spring mounting plate 133, an adjusting nut is connected to the spring column 136 through threads, and the lower end of the air escape spring 134 abuts against the adjusting nut.

When the reaction cavity 101 is in a reaction state or the reaction cavity 101 is in a state of introducing reaction gas or steam, the feeding switch valve is in a closed state, if the materials need to be put in, the electromagnet 128 is closed, so that the feeding cover 129 is separated from the base 127, at the moment, the whole feeding cover 129 and the sealing plug 132 connected to the feeding cover 129 can be taken down, at the moment, the feeding hole is opened, the materials enter the feeding pipe 113 through the annular channel between the air leakage pipe 130 and the inner wall of the base 127, and then enter the material cavity 110; let in the reaction chamber 101 when unstable or other reasons produce a large amount of gas because of the reaction, gas can get into material chamber 110 through the clearance between slip post 105 and the first connecting seat 103 in, then get into the inlet pipe 113 in, through disappointing passageway 131 extrusion spring mounting board 133, then release the hole of disappointing with sealing plug 132, open the hole of disappointing and carry out the pressure release, thereby can guarantee no matter be reaction chamber 101 or material chamber 110 in homoenergetic safety pressure release, and adopt the mode of this kind of dual pressure release, can effectively increase pressure release efficiency, guarantee whole reaction unit's security performance.

Example 2

An EPS foam material molding process, characterized in that it employs the EPS foam material molding apparatus of embodiment 1, which includes the steps of:

step 1, placing polystyrene resin into a reaction cavity 101 of a material reaction device, introducing CO2 into the reaction cavity 101 of the material reaction device through a CO2 air inlet channel 116 of an air inlet pipe 114, and adding an antistatic agent into the reaction cavity 101 through an inlet pipe 113, wherein the antistatic agent is dodecyl dihydroxypropyl methyl ammonium sulfate to obtain modified EPS beads;

step 2, mixing titanate and calcium carbonate powder according to a mass ratio of 1: 3, adding the mixture into a high-speed mixer for mixing, preserving the heat for 1-2h at the temperature of 100-120 ℃, then adding neodymium oxide, and stirring for 0.5-1h at the temperature of 80-90 ℃ to obtain a mixed solution; the mixed liquid contains calcium carbonate, so that the strength of the EPS beads can be improved.

Step 3, adding organosiloxane with the mole number of 0.1-3.0 into the mixed solution according to the volume ratio of 1: 2; the organic siloxane chemically modifies the polystyrene resin, so that the finally prepared EPS beads have aging resistance, and the service life of the EPS beads is effectively prolonged.

Step 4, adding the modified EPS beads into the mixed solution, heating to 200-;

Wherein, the specific steps of the step 1 are as follows: placing polystyrene resin into a reaction cavity 101 of a material reaction device, introducing CO2 into the reaction cavity 101 of the material reaction device through a CO2 air inlet channel 116 of an air inlet pipe 114, and dividing the reaction into three stages of reaction, wherein the first reaction stage is to adjust the interior of the reaction cavity 101 of the material reaction device to the pressure of 2-4MPa and the temperature of 60-80 ℃ and keep the reaction for 30min, the second reaction stage is to adjust the interior of the reaction cavity 101 of the material reaction device to the pressure of 4-6MPa and the temperature of 80-100 ℃ and keep the reaction for 30min, and an antistatic agent is added through a feed pipe 113 at the stage; the third reaction stage is to adjust the interior of the reaction chamber 101 of the material reaction device to a pressure of 6-10MPa and a temperature of 100 ℃ and 120 ℃, and to maintain for 30min, so as to finally obtain the modified polystyrene resin, and at this stage, carbon black is added through the feeding pipe 113.

In the step, the polystyrene resin is pretreated to be prefoamed in a CO2 environment, the antistatic treatment is carried out for the first time in the process, the pretreatment is divided into three stages of reaction, the polystyrene resin is subjected to low-temperature and low-pressure treatment in the first stage to be properly dispersed to prepare for fusing the antistatic agent in the later stage, then the antistatic agent is added in the second stage, and finally the polystyrene resin is in a high-temperature and high-pressure state in the third stage, so that the antistatic agent can be completely fused, and the polystyrene resin can achieve the optimal antistatic effect. By adopting the sectional pre-foaming mode, the closed cell rate of the polystyrene resin can be effectively improved.

In the embodiment, the carbon black is added in the third reaction stage, the polystyrene generates the seepage transition from the insulator to the electric conductor, and the strength of Van der Waals force or other bonding force between adjacent particles is enough to overcome the repulsion action between the particles so as to connect the particles with each other, thereby forming a network chain and providing a channel for the transmission of carriers, so that the antistatic agent can be fused to the optimal state in the third reaction stage under the action of the carbon black.

Sodium propylamine and acetylene carbon black are added to carry out secondary antistatic treatment in the embodiment, wherein the acetylene carbon black is used as a main antistatic agent, the sodium propylamine is used as an auxiliary antistatic agent, and the sodium propylamine and the acetylene carbon black are added into a resin matrix. This time antistatic treatment can strengthen the effect of antistatic treatment for the first time for the antistatic performance of final product improves greatly.

In the embodiment, the silane coupling agent and the carbon fiber are combined through the chemical bond action to strengthen the interface action force, so that the compatibility among all components in the polystyrene is improved, and the friction resistance and the strength of the finally prepared EPS foam material are obviously improved.

In summary, the above-mentioned embodiments are only preferred embodiments of the present invention, and all equivalent changes and modifications made in the claims of the present invention should be covered by the claims of the present invention.

Claims

EPS foam material forming device, including material reaction unit, material reaction unit is equipped with reaction housing (102) of reaction chamber (101) including inside, its characterized in that: the middle part of the outer side surface of the upper top plate of the reaction shell (102) is fixed with a bottom end communicated with the inside of the reaction cavity (101), the upper end of the inner side surface of the upper top plate of the reaction shell (102) is provided with a cylindrical first connecting seat (103), the middle part of the inner side surface of the upper top plate of the reaction shell (102) is fixed with a cylindrical second connecting seat (104) which is opposite to the first connecting seat (103) and is provided with openings at the upper and lower ends, the reaction shell further comprises a sliding column (105) which is arranged in the first connecting seat (103) and can slide downwards along the inner wall of the first connecting seat (103) to the second connecting seat (104), the upper end part of the sliding column (105) and positioned on the outer side wall of the sliding column (105) are provided with an annular flange (106), the first sealing surface (107) and the second sealing surface (108) which can form a seal with the upper and lower surfaces of the annular flange (106) are respectively arranged in the, an annular sealing flange (109) capable of forming sealing with the lower bottom surface of the sliding column (105) is arranged on the inner side wall of the second connecting seat (104) and positioned at the lower end of the second connecting seat (104); inside material chamber (110) that is equipped with of slip post (105), be equipped with on material chamber (110) lateral wall with material through-hole (111) of the outside intercommunication of slip post (105), be equipped with on the lateral wall of second connecting seat (104) with material export (112) of the inside intercommunication of reaction chamber (101), be fixed with on the up end of slip post (105) all with material chamber (110) inside feed pipe (113) and intake pipe (114) that communicate, establish material ooff valve (115) on feed pipe (113), establish the gas switch valve on intake pipe (114), intake pipe (114) inside is equipped with two adjacent inlet channel (116), all be equipped with the admission valve on two inlet channel (116).
2. The EPS foam molding apparatus according to claim 1, characterized in that: the device is characterized by further comprising a driving mechanism fixed on the top plate on the reaction shell (102), the driving mechanism comprises a mounting seat (117) fixed on the top plate on the reaction shell (102), the mounting seat (117) comprises four upward extending supporting rods (118) fixed on the upper top plate, a mounting plate (119) is fixed at the upper end of each supporting rod (118), a driving cylinder (120) is fixed on each mounting plate (119), a piston rod of each driving cylinder (120) can stretch out downwards, and the end of each piston rod is connected with the sliding column (105).
3. The EPS foam molding apparatus according to claim 1, characterized in that: be equipped with pressure adjustment mechanism between the piston rod of drive cylinder (120) and slip post (105), pressure adjustment mechanism includes that the upper end is fixed in regulation seat (121) of piston rod tip, it has downwardly extending's screw rod (122) to adjust seat (121) internal fixation, threaded connection has screw plate (123) on screw rod (122), be fixed with spliced pole (124) on the up end of slip post (105), spliced pole (124) upper end inserts and is adjusted seat (121) in and be equipped with annular plate (125) on the lateral wall of the portion of inserting of spliced pole (124), be equipped with between annular plate (125) and screw plate (123) and be located the inside adjusting spring (126) of regulation seat (121), adjusting spring (126) support annular plate (125) tightly on the lower bottom surface of adjusting seat (121), be equipped with the regulation hole that supplies spliced pole (124) to insert on the lower bottom surface of adjusting seat (121), spliced pole (124) can be followed the relative up slip of regulation hole.
4. The EPS foam molding apparatus according to claim 1, characterized in that: the screw rods (122) in the adjusting seat (121) and the connecting columns (124) fixed on the sliding columns (105) are two, and the screw rods (122) and the connecting columns (124) are arranged in a one-to-one up-and-down correspondence mode.
5. The EPS foam molding apparatus according to claim 1, characterized in that: the feeding device comprises a feeding pipe (113), a material switch valve (115) and a feeding cover (129), wherein the feeding pipe is provided with a feeding hole on the end face of the feeding pipe (113), the material switch valve (115) is arranged at the feeding hole, the material switch valve (115) comprises a base (127), the base (127) is fixed on the feeding pipe (113), and the feeding cover (129) is arranged in the feeding hole and connected with the base (127) through an electromagnet (128) and used for sealing the feeding.
6. An EPS foam molding apparatus as claimed in claim 5, wherein: base (127) middle part is equipped with disappointing pipe (130), disappointing pipe (130) inside formation and inlet pipe (113) inside intercommunication lose heart passageway (131), it connects on base (127) inside wall through many connecting rods to lose heart pipe (130), feeding lid (129) middle part is equipped with be the shoulder hole form and with the corresponding disappointing hole of losing heart passageway (131), it is equipped with sealing plug (132) to lose heart downthehole, sealing plug (132) upper end is equipped with and is annular flange portion, form sealedly between the lower surface of flange portion and the ladder face of losing heart, the lower tip of sealing plug (132) stretches into in losing heart passageway (131) and is fixed with can follow the gliding spring mounting board (133) of losing heart pipe (130) inner wall from top to bottom, be equipped with between spring mounting board (133) and feeding lid (129) and lose heart spring (134), be equipped with annular baffle (135) on losing heart pipe (130) inner wall, it supports spring mounting board (133) tightly on annular baffle (135) to lose heart.
7. An EPS foam molding apparatus as claimed in claim 6, wherein: a spring column (136) with external threads on the outer surface is fixed on the spring mounting plate (133), an adjusting nut is connected to the spring column (136) in a threaded manner, and the lower end of the air leakage spring (134) abuts against the adjusting nut.
An EPS foam molding process characterized by using the EPS foam molding apparatus of any one of claims 1 to 7, comprising the steps of:

the method comprises the following steps of firstly, pre-foaming the polystyrene resin, and specifically comprises the following steps:

step (1), placing polystyrene resin into a reaction cavity (101) of a material reaction device, introducing CO2 into the reaction cavity (101) of the material reaction device through a CO2 air inlet channel (116) of an air inlet pipe (114), and adding an antistatic agent into the reaction cavity (101) through a feeding pipe (113) to obtain modified EPS beads;

step (2), mixing titanate and calcium carbonate powder according to a mass ratio of 1: 3, adding the mixture into a high-speed mixer for mixing, preserving the heat for 1-2h at the temperature of 100-120 ℃, then adding neodymium oxide, and stirring for 0.5-1h at the temperature of 80-90 ℃ to obtain a mixed solution;

adding organosiloxane with the mole number of 0.1-3.0 into the mixed solution according to the volume ratio of 1: 2;

step (4) adding the modified EPS beads into the mixed solution, heating to 200-250 ℃, stirring for 0.5-1h, adding sodium propylamine and acetylene black, continuously mixing for 30min at 100-120 ℃, then adding a silane coupling agent and carbon fibers, heating and uniformly mixing at 150-200 ℃ to obtain a modified EPS bead mixture;

step two, carrying out curing treatment, namely conveying the pre-foamed modified EPS bead mixture into a curing bin for curing;

and step three, molding treatment, namely extracting the cured modified EPS bead mixture to a molding machine, then filling the molding machine into a mold, and introducing steam to expand the EPS beads to obtain a molded product.
9. A process for forming EPS foam according to claim 8, wherein: the specific steps of the step (1) are as follows: placing polystyrene resin into a reaction cavity (101) of a material reaction device, introducing CO2 into the reaction cavity (101) of the material reaction device through a CO2 air inlet channel (116) of an air inlet pipe (114), and dividing into three stages of reactions, wherein the first reaction stage is to adjust the interior of the reaction cavity (101) of the material reaction device to 2-4MPa and 60-80 ℃ and keep the pressure for 30min, the second reaction stage is to adjust the interior of the reaction cavity (101) of the material reaction device to 4-6MPa and 80-100 ℃ and keep the temperature for 30min, and an antistatic agent is added through an inlet pipe (113) at the stage; the third reaction stage is to adjust the interior of the reaction chamber (101) of the material reaction device to the pressure of 6-10MPa and the temperature of 100-.
10. The EPS foam molding process of claim 8, wherein: the antistatic agent in the step (1) is dodecyl dihydroxypropyl methyl sulfate amine.