CN114794789A - Shaped PU sponge and preparation method thereof - Google Patents

Shaped PU sponge and preparation method thereof Download PDF

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Publication number
CN114794789A
CN114794789A CN202210495528.5A CN202210495528A CN114794789A CN 114794789 A CN114794789 A CN 114794789A CN 202210495528 A CN202210495528 A CN 202210495528A CN 114794789 A CN114794789 A CN 114794789A
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CN
China
Prior art keywords
sponge
air hole
gas pocket
mold
main body
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Pending
Application number
CN202210495528.5A
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Chinese (zh)
Inventor
王少阶
元卿
李娜
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Juyou Shenzhen Polymer New Material Technology Co ltd
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Juyou Shenzhen Polymer New Material Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Juyou Shenzhen Polymer New Material Technology Co ltd filed Critical Juyou Shenzhen Polymer New Material Technology Co ltd
Priority to CN202210495528.5A priority Critical patent/CN114794789A/en
Publication of CN114794789A publication Critical patent/CN114794789A/en
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/14—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays
    • 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
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/02—Deburring or deflashing
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/3442—Mixing, kneading or conveying the foamable material
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/3442—Mixing, kneading or conveying the foamable material
    • B29C44/3446—Feeding the blowing agent
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/36—Feeding the material to be shaped
    • B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

The invention discloses a shaping PU sponge, which comprises a sponge main body, wherein the top of the sponge main body is a sponge bottom surface, the bottom of the sponge main body is a sponge face, the sponge bottom surface is provided with a first air hole, the sponge face is provided with a second air hole, and the first air hole is communicated with the second air hole. The sponge is provided with the first air holes and the second air holes, so that the first air holes and the second air holes are communicated up and down, the air permeability of a product is stronger, the permeation between the surface of the sponge and the bottom of the sponge is realized, the air permeability of the sponge main body is greatly improved, and the resilience performance of the product is improved to a certain extent, so that the product can be suitable for different working conditions in practical application, the application range is relatively wider, the height of the first air holes is larger than that of the second air holes, and the diameter of the first air holes is larger than that of the second air holes, so that the supporting force and the physical elasticity of the product are increased.

Description

Shaped PU sponge and preparation method thereof
Technical Field
The invention relates to the technical field of shaped PU sponge, in particular to a shaped PU sponge and a preparation method thereof.
Background
The PU sponge is also called polyurethane sponge, polyurethane soft foaming rubber, polyurethane is the most common polymer material in life, and is widely applied to manufacturing various sponge products. At present, high-resilience polyurethane sponge is prepared by introducing high-resilience polyether into a sponge formula, so that the diameters of foam pores of the sponge are mixed and distributed, the thicknesses of frameworks of the foam pores are different, the foam pores have a large opening ratio, and the high-resilience polyurethane sponge can generate resilience with different supporting forces in different deformation states when being pressed. Because the high resilience product made of the high resilience sponge can provide better comfort, the high resilience polyurethane sponge can be widely applied to furniture, seat cushions, sports protective equipment, shoe materials and the like.
However, the PU sponge used for the mattress sofa in the market at present cannot meet the requirements of people due to relatively imperfect technology, the structure in the prior art is simple and crude, the air permeability is insufficient, and the problem of fatigue decline often appears after long-time use.
Disclosure of Invention
The invention aims to solve the technical problems and provides a shaped PU sponge and a preparation method thereof.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
the utility model provides a design PU sponge, includes the sponge main part, the top of sponge main part be sponge bottom surface and sponge main part's bottom for sponge face, the sponge bottom surface on be provided with first gas pocket, sponge face on be provided with the second gas pocket, first gas pocket and second gas pocket between be linked together, and first gas pocket and the coaxial setting of second gas pocket, the shape of first gas pocket and second gas pocket can be one of them kind of circular, hexagon and square, the height that highly will be greater than the second gas pocket of first gas pocket, and the diameter ratio second gas pocket of first gas pocket is big.
After adopting the structure, the invention has the following advantages:
1. the sponge is provided with the first air holes and the second air holes, so that the first air holes and the second air holes are communicated up and down, the air permeability of the product is stronger, the permeation between the sponge face and the sponge bottom is realized, the air permeability of the sponge main body is greatly improved, the resilience performance of the product is improved to a certain extent, the product can be suitable for different working conditions in practical application, and the application range is relatively wider.
2. The height of the first air hole is larger than that of the second air hole, and the diameter of the first air hole is larger than that of the second air hole, so that the supporting force and the physical elasticity of the product are increased.
As an improvement, the first air hole and the second air hole are arranged in a plurality of groups and are respectively arranged in the sponge main body.
As an improvement, the draft angle of the first air hole and the second air hole is 0.5-3 degrees.
A preparation method of a shaped PU sponge sequentially comprises the following steps:
s1, preheating and preprocessing the die: firstly, cleaning the interior of a mould to remove impurities on the surface, preventing the impurities existing on the surface of a finished product after curing and forming from influencing the quality of the finished product, then installing a cylinder for manufacturing a first air hole and a second air hole in the mould for fixing, switching on a power supply to preheat the mould, stopping continuously heating after preheating to a proper specified temperature, keeping the current temperature for later use,
s2, material mixing pretreatment: adding raw materials into a mixer according to a ratio, fully mixing the raw materials through the interior of the mixer to prepare a material A, and then adding a foaming agent into the prefabricated material A of the mixer after the raw materials are mixed to perform high-speed mixing for standby;
s3, mould grouting and foaming pretreatment: inputting the slurry prepared in the step S2 into an injection molding machine through a pump machine, injecting the slurry into a mold by the injection molding machine, wherein the adding amount is matched with the molding volume of a finished product, then covering a top cover of the mold, and at the moment, a mounting column for manufacturing a first air hole on the top cover of the mold is attached to a mounting column for manufacturing a second air hole on a bottom frame of a lower mold, and the top cover of the mold is locked and fixed to close the mold through a locking workpiece;
s4, curing and demolding: heating and shaping the slurry in the die, standing for curing after the shaping is finished, disassembling the locking workpiece after the curing is finished, starting the lower cylinder to drive the lower die to descend so as to separate the mounting column from the second air hole on the sponge face, and taking down the sponge main body from the mounting column on the top cover of the die, wherein the second air hole and the first air hole which are the same as the mounting column in position and size are formed in the sponge main body;
s5, bubble processing step: placing the molded sponge main body in an extruder for pressing so as to release redundant air bubbles inside;
s6, repairing: repairing the sponge main body in the step S5, and removing redundant corners;
s7: natural curing and finished product processing steps: placing the sponge main body in the step S6 on a display rack, waiting for the cured sponge to stand still in the natural environment for natural curing, and then carrying out packaging treatment after the natural curing is finished.
In step S1, the mold is heated to 70 ℃ or higher, the material is molded by foaming, and the molded material is cooled by water to a constant temperature of 25-28 ℃, and the molded material is taken out after reaching the temperature.
As a modification, the content of the foaming agent in the step S2 is 4.8-6.5%.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a second embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a third embodiment of the present invention.
FIG. 4 is a cross-sectional view of a shaped PU sponge and a method of making the same according to the present invention.
As shown in the figure: 1. sponge main part, 2, sponge bottom surface, 2.1, second gas pocket, 3, sponge face, 3.1, second gas pocket.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Combine attached drawing 1-4, a design PU sponge, including sponge main part 1, its characterized in that, the top of sponge main part 1 be sponge bottom surface 2 and the bottom of sponge main part 1 is sponge face 3, sponge bottom surface 2 on be provided with first gas pocket 2.1, sponge face 3 on be provided with second gas pocket 3.1, first gas pocket 2.1 and second gas pocket 3.1 between be linked together, and first gas pocket 2.1 and the coaxial setting of second gas pocket 3.1, first gas pocket 2.1 and second gas pocket 3.1 the shape can be one of them of circular, hexagon and square, first gas pocket 2.1 highly will be greater than the height of second gas pocket 3.1, and the diameter ratio of first gas pocket 2.1 is bigger than second gas pocket 3.1.
The first air hole 2.1 and the second air hole 3.1 are arranged in a plurality of groups and are respectively arranged in the sponge main body 1.
The draft angle of the first air hole 2.1 and the second air hole 3.1 is 0.5-3 degrees.
A preparation method of a shaped PU sponge sequentially comprises the following steps:
s1, preheating and preprocessing the die: firstly, cleaning the interior of a mould to remove impurities on the surface, preventing the impurities existing on the surface of a finished product after curing and forming from influencing the quality of the finished product, then fixing a mounting column for manufacturing a first air hole 2.1 and a second air hole 3.1 in the mould, switching on a power supply to preheat the mould, stopping heating continuously after preheating to a proper specified temperature, keeping the current temperature for standby,
s2, material mixing pretreatment: adding raw materials into a mixer according to a ratio, fully mixing the raw materials through the interior of the mixer to prepare a material A, and then adding a foaming agent into the prefabricated material A of the mixer after the raw materials are mixed to perform high-speed mixing for standby;
s3, mould grouting and foaming pretreatment: inputting the slurry prepared in the step S2 into an injection molding machine through a pump machine, injecting the slurry into a mold by the injection molding machine, wherein the adding amount is matched with the molding volume of a finished product, then covering a top cover of the mold, and at the moment, a mounting column for manufacturing a first air hole 2.1 on the top cover of the mold is jointed with a mounting column for manufacturing a second air hole 3.1 on a bottom frame of a lower mold, and locking the top cover of the mold through a locking workpiece to fix the closed mold;
s4, curing and demolding: heating and shaping the slurry in the die, standing for curing after the shaping is finished, disassembling the locking workpiece after the curing is finished, starting a lower cylinder to drive the lower die to descend so as to separate the lower die from a second air hole 3.1 of the sponge face part 3, taking down the sponge main body 1 from an installation column on a top cover of the die, and forming a second air hole 3.1 and a first air hole 2.1 which are the same as the installation column in position and size on the sponge main body 1;
s5, bubble processing step: placing the molded sponge main body 1 in an extruder for pressing so as to release redundant air bubbles inside;
s6, repairing: repairing the sponge main body 1 in the step of S5, and removing redundant corners;
s7: natural curing and finished product processing steps: the sponge body 1 in step S6 is placed on a display shelf, and the aging sponge is left standing in a natural environment for natural aging, and then the natural aging is completed, followed by packaging treatment.
And S1, heating the die in the step S1 to be controlled to be above 70 ℃, pouring the material to be molded, foaming and forming, cooling the molded material by water to be controlled to be between 25 and 28 ℃, cooling the molded material by water to reach the temperature, taking out the molded product, and demolding.
The content of the foaming agent in the step S2 is 4.8% -6.5%.
The first embodiment is as follows:
a preparation method of a shaped PU sponge sequentially comprises the following steps:
s1, preheating and preprocessing the die: firstly, cleaning the interior of a mould to remove impurities on the surface, preventing the impurities existing on the surface of a finished product after curing and forming from influencing the quality of the finished product, then fixing a mounting column for manufacturing a first air hole 2.1 and a second air hole 3.1 in the mould, setting a drawing angle at 1 degree, setting the mounting column to be a cylindrical structure, switching on a power supply to preheat the mould, stopping continuously heating after preheating to a proper specified temperature, keeping the current temperature for later use,
s2, material mixing pretreatment: adding raw materials into a mixer according to a proportion, fully mixing the raw materials through the interior of the mixer to prepare a material A, then adding a foaming agent into the prefabricated material A of the mixer after the raw materials are mixed, and mixing the foaming agent at a high speed for standby application, wherein the material A adopts stannous octoate, silicone oil, triethylene diamine, polyether polyol and purified water;
s3, mould grouting and foaming pretreatment: inputting the slurry prepared in the step S2 into an injection molding machine through a pump machine, injecting the slurry into a mold by the injection molding machine, wherein the adding amount is matched with the molding volume of a finished product, then covering a top cover of the mold, and at the moment, a mounting column for manufacturing a first air hole 2.1 on the top cover of the mold is jointed with a mounting column for manufacturing a second air hole 3.1 on a bottom frame of a lower mold, and locking the top cover of the mold through a locking workpiece to fix the closed mold;
s4, curing and demolding: heating and shaping the slurry in the mold, wherein the temperature of the mold in the step S1 is controlled to be higher than 70 ℃, the material is molded and foamed after being poured, the molded material is cooled by water at a constant temperature of 25 ℃, the product is taken out after the temperature of the water is reached, demolding is carried out, after shaping is finished, the mold is kept stand to wait for curing, the curing time is 10min, a locking workpiece can be disassembled after curing is finished, a lower cylinder is started to drive the lower mold to descend so as to separate the mold from a second air hole 3.1 of the sponge face part 3, and then the sponge main body 1 is taken down from an installation column on a top cover of the mold, and at the moment, a second air hole 3.1 and a first air hole 2.1 which are the same as the installation column in position and size appear on the sponge main body 1;
s5, bubble processing step: placing the molded sponge main body 1 in an extruder for pressing so as to release redundant air bubbles inside;
s6, repairing: repairing the sponge main body 1 in the step of S5, and removing redundant corners;
s7, natural curing and finished product processing steps: placing the sponge body 1 in the step S6 on a display shelf, waiting for aging for 2 days, standing the sponge in natural environment for natural aging, and then performing packaging treatment after the natural aging is completed.
Example two:
a preparation method of a shaped PU sponge sequentially comprises the following steps:
s1, preheating and preprocessing the die: firstly, cleaning the interior of a mould to remove impurities on the surface, preventing the impurities existing on the surface of a finished product after curing and forming from influencing the quality of the finished product, then fixing a mounting column for manufacturing a first air hole 2.1 and a second air hole 3.1 in the mould, setting a drawing angle at 1.5 degrees, setting the mounting column as a hexagonal main body, switching on a power supply to preheat the mould, stopping continuously heating after preheating to a proper specified temperature, keeping the current temperature for later use,
s2, material mixing pretreatment: adding raw materials into a mixer according to a proportion, fully mixing the raw materials through the interior of the mixer to prepare a material A, then adding a foaming agent into the prefabricated material A of the mixer after the raw materials are mixed, and mixing the foaming agent at a high speed for standby application, wherein the material A adopts stannous octoate, silicone oil, triethylene diamine, polyether polyol and purified water;
s3, pre-processing steps of mold grouting and foaming: inputting the slurry prepared in the step S2 into an injection molding machine through a pump machine, injecting the slurry into a mold by the injection molding machine, wherein the adding amount is matched with the molding volume of a finished product, then covering a top cover of the mold, and at the moment, a mounting column for manufacturing a first air hole 2.1 on the top cover of the mold is jointed with a mounting column for manufacturing a second air hole 3.1 on a bottom frame of a lower mold, and locking the top cover of the mold through a locking workpiece to fix the closed mold;
s4, curing and demolding: heating and shaping the slurry in the mold, wherein the temperature of the mold in the step S1 is controlled to be higher than 70 ℃, the material is molded and foamed after being poured, the molded material is cooled by water at a constant temperature of 26 ℃, the product is taken out after the temperature is reached by the water cooling, the product is demolded, after the shaping is finished, the mold is kept stand to wait for curing, the curing time is 10min, the locking workpiece can be disassembled after the curing is finished, the lower cylinder is started to drive the lower mold to descend so as to realize the separation of the mold from the second air hole 3.1 of the sponge face part 3, and the sponge main body 1 is taken down from the mounting column on the top cover of the mold, and at the moment, the second air hole 3.1 and the first air hole 2.1 which have the same position and size as the mounting column appear on the sponge main body 1;
s5, bubble processing step: placing the molded sponge main body 1 in an extruder for pressing, so that redundant air bubbles in the sponge main body are released;
s6, repairing: repairing the sponge main body 1 in the step of S5, and removing redundant corners;
s7, natural curing and finished product processing steps: placing the sponge body 1 in the step S6 on a display shelf, waiting for aging for 2 days, standing the sponge in natural environment for natural aging, and then performing packaging treatment after the natural aging is completed.
Example three:
a preparation method of a shaped PU sponge sequentially comprises the following steps:
s1, preheating and preprocessing the die: firstly, cleaning the interior of a mould to remove impurities on the surface, preventing the impurities existing on the surface of a finished product after curing and forming from influencing the quality of the finished product, then fixing a mounting column for manufacturing a first air hole 2.1 and a second air hole 3.1 in the mould, setting a drawing angle at 2 degrees, setting the mounting column to be a cuboid, switching on a power supply to preheat the mould, stopping continuously heating after preheating to a proper specified temperature, keeping the current temperature for later use,
s2, material mixing pretreatment: adding raw materials into a mixer according to a proportion, fully mixing the raw materials through the interior of the mixer to prepare a material A, then adding a foaming agent into the prefabricated material A of the mixer after the raw materials are mixed, and mixing the foaming agent at a high speed for standby application, wherein the material A adopts stannous octoate, silicone oil, triethylene diamine, polyether polyol and purified water;
s3, mould grouting and foaming pretreatment: inputting the slurry prepared in the step S2 into an injection molding machine through a pump machine, injecting the slurry into a mold by the injection molding machine, wherein the adding amount is matched with the molding volume of a finished product, then covering a top cover of the mold, and at the moment, a mounting column for manufacturing a first air hole 2.1 on the top cover of the mold is jointed with a mounting column for manufacturing a second air hole 3.1 on a bottom frame of a lower mold, and locking the top cover of the mold through a locking workpiece to fix the closed mold;
s4, curing and demolding: heating and shaping the slurry in the mold, wherein the temperature of the mold in the step S1 is controlled to be higher than 70 ℃, the material is molded and foamed after being poured, the molded material is cooled by water at a constant temperature of 27 ℃, the product is taken out after the temperature of the water is reached, demolding is carried out, after shaping is finished, the mold is kept stand to wait for curing, the curing time is 10min, a locking workpiece can be disassembled after curing is finished, a lower cylinder is started to drive the lower mold to descend so as to separate the mold from a second air hole 3.1 of the sponge face part 3, and then the sponge main body 1 is taken down from an installation column on a top cover of the mold, and at the moment, a second air hole 3.1 and a first air hole 2.1 which are the same as the installation column in position and size appear on the sponge main body 1;
s5, bubble processing step: placing the molded sponge main body 1 in an extruder for pressing so as to release redundant air bubbles inside;
s6, repairing: repairing the sponge main body 1 in the step of S5, and removing redundant corners;
s7, natural curing and finished product processing steps: placing the sponge body 1 in the step S6 on a display shelf, waiting for aging for 2 days, standing the sponge in natural environment for natural aging, and then performing packaging treatment after the natural aging is completed.
The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (6)

1. The utility model provides a design PU sponge, includes sponge main part (1), its characterized in that, the top of sponge main part (1) be sponge bottom surface (2) and the bottom of sponge main part (1) be sponge face portion (3), sponge bottom surface (2) on be provided with first gas pocket (2.1), sponge face portion (3) on be provided with second gas pocket (3.1), first gas pocket (2.1) and second gas pocket (3.1) between be linked together, and first gas pocket (2.1) and second gas pocket (3.1) coaxial setting, the shape of first gas pocket (2.1) and second gas pocket (3.1) can be one of them of circular, hexagon and square, the height that highly will be greater than second gas pocket (3.1) of first gas pocket (2.1), and the diameter ratio second gas pocket (3.1) of first gas pocket (2.1) is big.
2. A shaped PU sponge according to claim 1, wherein: the first air holes (2.1) and the second air holes (3.1) are arranged in a plurality of groups and are respectively arranged in the sponge main body (1).
3. A shaped PU sponge according to claim 2, wherein: the drawing angle of the first air hole (2.1) and the second air hole (3.1) is 0.5-3 degrees.
4. The preparation method of the shaped PU sponge is characterized by sequentially comprising the following steps:
s1, preheating and preprocessing the die: firstly, cleaning the interior of a mould to remove impurities on the surface, preventing the impurities existing on the surface of a finished product after curing and forming from influencing the quality of the finished product, then fixing a mounting column for manufacturing a first air hole (2.1) and a second air hole (3.1) in the mould, switching on a power supply to preheat the mould, stopping continuously heating after preheating to a proper specified temperature, keeping the current temperature for later use,
s2, material mixing pretreatment: adding raw materials into a mixer according to a ratio, fully mixing the raw materials through the interior of the mixer to prepare a material A, and then adding a foaming agent into the prefabricated material A of the mixer after the raw materials are mixed to perform high-speed mixing for standby;
s3, mould grouting and foaming pretreatment: inputting the slurry prepared in the step S2 into an injection molding machine through a pump machine, injecting the slurry into a mold by the injection molding machine, wherein the adding amount is matched with the molding volume of a finished product, then covering a top cover of the mold, and at the moment, a mounting column for manufacturing a first air hole (2.1) on the top cover of the mold is jointed with a mounting column for manufacturing a second air hole (3.1) on a bottom frame of a lower mold, and locking the top cover of the mold through a locking workpiece to fix and seal the mold;
s4, curing and demolding treatment: heating and shaping the slurry in the die, standing for curing after the shaping is finished, disassembling the locking workpiece after the curing is finished, starting a lower cylinder to drive the lower die to descend so as to separate the lower die from a second air hole (3.1) of the sponge face part (3), taking down the sponge main body (1) from an installation column on a top cover of the die, and then forming a second air hole (3.1) and a first air hole (2.1) which are the same as the installation column in position and size on the sponge main body (1);
s5, bubble processing step: placing the molded sponge main body (1) in an extruder for pressing so as to release redundant air bubbles inside;
s6, repairing: repairing the sponge main body (1) in the step S5, and removing redundant corners;
s7, natural curing and finished product processing steps: the sponge body (1) in the step S6 is placed on a display rack, the aging sponge is stood for natural aging in the natural environment, and then the packaging treatment is carried out after the natural aging is finished.
5. The method for preparing a shaped PU sponge according to claim 4, wherein: and S1, heating the die to above 70 ℃, pouring the material to perform die assembly foaming molding, cooling the material with water to constant temperature of 25-28 ℃ after molding, taking out the product after the water cooling reaches the temperature, and demolding.
6. The method for preparing a shaped PU sponge according to claim 4, wherein: the content of the foaming agent in the step S2 is 4.8% -6.5%.
CN202210495528.5A 2022-05-08 2022-05-08 Shaped PU sponge and preparation method thereof Pending CN114794789A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210495528.5A CN114794789A (en) 2022-05-08 2022-05-08 Shaped PU sponge and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210495528.5A CN114794789A (en) 2022-05-08 2022-05-08 Shaped PU sponge and preparation method thereof

Publications (1)

Publication Number Publication Date
CN114794789A true CN114794789A (en) 2022-07-29

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ID=82512699

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Application Number Title Priority Date Filing Date
CN202210495528.5A Pending CN114794789A (en) 2022-05-08 2022-05-08 Shaped PU sponge and preparation method thereof

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