CN113492483A - PVC foaming method and equipment for chalk writing board - Google Patents
PVC foaming method and equipment for chalk writing board Download PDFInfo
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- CN113492483A CN113492483A CN202110935294.7A CN202110935294A CN113492483A CN 113492483 A CN113492483 A CN 113492483A CN 202110935294 A CN202110935294 A CN 202110935294A CN 113492483 A CN113492483 A CN 113492483A
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- 238000005187 foaming Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 72
- 238000009413 insulation Methods 0.000 claims abstract description 69
- 238000003756 stirring Methods 0.000 claims abstract description 61
- 238000010438 heat treatment Methods 0.000 claims abstract description 55
- 238000004321 preservation Methods 0.000 claims description 19
- 238000009434 installation Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- 230000002349 favourable effect Effects 0.000 abstract description 6
- 238000003754 machining Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 5
- 230000005674 electromagnetic induction Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- 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
- B29C44/3415—Heating or cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/06—PVC, i.e. polyvinylchloride
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention relates to the technical field of PVC foaming, in particular to a PVC foaming method and equipment for a chalk writing board; place the raw materials in through the insulation can, heating element installs the inside at the insulation can, and to heating in the insulation can, make raw materials melt in the insulation can, the apron cover is established at the opening part of insulation can, prevent that the temperature from running off, stirring element installs on the apron, and drive the puddler rotation, the puddler is located the inside of insulation can, raw materials to in the insulation can stir evenly, the inside at the puddler is fixed to the heater strip, the switch-on operation heating, it is more even to make the raw materials be heated, the wind circulation subassembly is to defeated air supply in the insulation can, it is even to make the temperature through the circulation of air, and then the raw materials is heated more evenly, be favorable to raw materials foaming simultaneously, be favorable to improving machining efficiency.
Description
Technical Field
The invention relates to the technical field of PVC foaming, in particular to a PVC foaming method and equipment for a chalk writing board.
Background
The writing board made of PVC is suitable for writing of dust-free liquid chalk, can provide dust-free and tasteless for classroom teaching, writes convenient teaching aids, and avoids teachers and students and other teaching equipment from being corroded by dust.
In the production process of PVC, foaming is one of important processing methods, common foaming methods include chemical foaming, physical foaming and mechanical foaming, raw materials need to be heated in the foaming process to be melted and mixed, and then the raw materials are introduced into an extruder for molding, but the existing heating equipment has a simple structure and is easy to heat unevenly, so that the processing efficiency is influenced.
Disclosure of Invention
The invention aims to provide a PVC foaming method and equipment for a chalk writing board, and aims to solve the technical problem that the processing efficiency is influenced because the raw materials need to be heated in the foaming process in the prior art and the conventional heating equipment is simple in structure and easy to heat unevenly.
In order to achieve the purpose, the PVC foaming equipment for the chalk writing board comprises an insulation can, a heating assembly, a cover plate, a stirring assembly, a stirring rod, a heating wire and an air circulation assembly;
the heating assembly is fixedly connected with the insulation can, the cover plate is detachably connected with the insulation can and is positioned on one side of the insulation can, the stirring assembly is arranged on the cover plate and drives the stirring rod to rotate, the stirring rod is positioned in the insulation can, the heating wire is fixedly connected with the stirring rod and is positioned in the stirring rod, and the air circulation assembly supplies air to the insulation can.
The heating device is characterized in that the insulation can is internally used for placing raw materials, the heating component is arranged on the inner wall of the insulation can and heats the inside of the insulation can through electromagnetic induction, the raw materials in the insulation can are melted, the cover plate covers the opening of the insulation can to prevent temperature loss, the stirring component is arranged on the cover plate and drives the stirring rod to rotate, the stirring rod is located inside the insulation can and stirs and mixes the raw materials, the heating wire is arranged inside the stirring rod, the heating wire is connected with a power supply to heat the raw materials in the stirring box, so that the raw materials are heated more uniformly, the air circulation component supplies air to the inside of the insulation can to make the temperature in the insulation can more uniform, the raw materials are heated more uniformly, the raw materials are favorable for foaming of the raw materials, the foaming effect is better, and the processing efficiency is improved.
The heating assembly comprises an electromagnetic heating ring and a heat conducting layer, and the heat conducting layer is fixedly connected with the heat insulation box and is positioned on the inner side of the heat insulation box; the electromagnetic heating ring is fixedly connected with the heat conducting layer and is positioned between the heat conducting layer and the heat insulation box.
The heat conduction layer is fixed on the inner wall of the heat insulation box, the electromagnetic heating ring is wound on the heat conduction layer and is positioned between the heat conduction layer and the heat insulation box, electromagnetic induction heating is operated, and the electromagnetic induction heating is transmitted to the inner wall of the heat insulation box through the heat conduction layer, so that raw materials are heated and melted.
The stirring assembly comprises a driving motor and a rotating rod, and the driving motor is arranged on the cover plate; the rotating rod is fixedly connected with the output end of the driving motor and extends into the heat preservation box.
The drive motor is installed on the apron to the output with dwang fixed connection, the dwang runs through the apron stretches into the inside of insulation can, and can through the bearing rotate on the apron, and then the drive motor drive the dwang rotates.
The wind circulation assembly comprises a mounting cylinder, a connecting component and a power component, wherein the mounting cylinder is fixedly connected with the cover plate and is positioned on one side of the cover plate, which is far away from the insulation can; the connecting component is detachably connected with the mounting cylinder, and the power component is positioned on the outer side of the heat preservation box.
The mounting cylinder is mounted on the cover plate and communicated with the interior of the heat insulation box, and the connecting component enables the power component to be communicated with the interior of the heat insulation box.
The connecting component comprises a telescopic pipe and a rubber ring, the telescopic pipe is detachably connected with the mounting cylinder and is positioned on one side of the mounting cylinder, which is far away from the cover plate; the rubber ring is fixedly connected with the mounting cylinder and is positioned between the mounting cylinder and the telescopic pipe.
The telescopic pipe is communicated with the installation cylinder, and the rubber ring is positioned between the installation cylinder and the telescopic pipe, so that the telescopic pipe is more tightly connected with the installation cylinder.
The power component comprises a fan cover, a fan and an auxiliary component, wherein the fan cover is fixedly connected with the telescopic pipe and is positioned on one side of the telescopic pipe, which is far away from the installation cylinder; the fan is positioned on one side of the fan cover, which is far away from the telescopic pipe; the auxiliary component is detachably connected with the fan.
The fan housing is arranged on the telescopic rod, the fan is arranged on the ground through the auxiliary component and is close to the fan housing, the fan housing is connected with a power supply to operate, and air is supplied to the inside of the heat preservation box through the fan housing and the telescopic pipe.
A PVC foaming method for a chalk writing board comprises the following steps:
obtaining raw materials, and uniformly stirring and mixing the raw materials by using a stirring rod to obtain a mixed raw material;
heating and melting the mixed raw material through a heating assembly, and meanwhile, supplying air to the mixed raw material through the operation of a fan to obtain a melted raw material;
and extruding the melted raw materials through an extruder by a material injection die head, and cooling and shaping to obtain the product.
Firstly, putting raw materials into the heat preservation box, driving the stirring rod to rotate through the stirring assembly, uniformly stirring the raw materials to mix the raw materials, then heating the raw materials through the heating assembly and the heating wires to melt the mixed raw materials, simultaneously, operating the fan, supplying air to the mixed raw materials in the heat preservation box through the fan cover and the telescopic pipes to promote better foaming effect, and finally, extruding the melted raw materials through an extruder through an injection die head, cooling and shaping to obtain the product.
According to the PVC foaming method and the PVC foaming equipment for the chalk writing board, the raw materials are placed in the heat insulation box, the heating assembly is installed inside the heat insulation box and heats the heat insulation box to melt the raw materials in the heat insulation box, the cover plate is covered at the opening of the heat insulation box to prevent temperature loss, the stirring assembly is installed on the cover plate and drives the stirring rod to rotate, the stirring rod is located inside the heat insulation box to uniformly stir the raw materials in the heat insulation box, the heating wire is fixed inside the stirring rod and is switched on to operate and heat the raw materials, the air circulation assembly supplies air to the heat insulation box, the temperature is uniform through air circulation, the raw materials are heated more uniformly, the foaming of the raw materials is facilitated, and the processing efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a PVC foaming device for chalk writing boards.
Fig. 2 is a sectional view of the chalk writing board PVC foaming device of the present invention.
FIG. 3 is a schematic diagram of the construction of the power member of the present invention.
Fig. 4 is a schematic structural view of the stirring assembly of the present invention.
Fig. 5 is an enlarged view of fig. 2 a of the present invention.
FIG. 6 is a process diagram of the PVC foaming process for chalk writing boards of the present invention.
1-insulation box, 2-cover plate, 3-stirring rod, 4-heating wire, 10-heating component, 11-electromagnetic heating ring, 12-heat conducting layer, 20-stirring component, 21-driving motor, 22-rotating rod, 23-connecting rod, 24-brush plate, 30-wind circulating component, 31-mounting cylinder, 32-connecting component, 33-power component, 100-chalk writing plate PVC foaming equipment, 321-telescopic pipe, 322-rubber ring, 331-wind cover, 332-fan, 333-auxiliary component, 3331-mounting seat and 3332-shock pad.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1 to 5, the present invention provides a PVC foaming apparatus 100 for a chalk writing board, which comprises an incubator 1, a heating assembly 10, a cover plate 2, a stirring assembly 20, a stirring rod 3, a heating wire 4 and an air circulation assembly 30;
the heating assembly 10 is fixedly connected with the heat insulation box 1, the cover plate 2 is detachably connected with the heat insulation box 1 and is located on one side of the heat insulation box 1, the stirring assembly 20 is arranged on the cover plate 2 and drives the stirring rod 3 to rotate, the stirring rod 3 is located inside the heat insulation box 1, the heating wire 4 is fixedly connected with the stirring rod 3 and is located inside the stirring rod 3, and the air circulation assembly 30 supplies air to the inside of the heat insulation box 1.
In this embodiment, the heat preservation box 1 is made of heat preservation material, and the interior of the heat preservation box 1 is used for placing raw materials, the heating component 10 is installed inside the heat preservation box 1 and operates to heat the raw materials in the heat preservation box 1, the cover plate 2 is covered at the opening of the heat preservation box 1 to prevent temperature loss, the stirring component 20 is installed on the cover plate 2 and is used for driving the stirring rod 3, the stirring rod 3 is located inside the heat preservation box 1 to stir the raw materials in the heat preservation box 1, the type of the heating wire 4 is RA1100, the heating wire is fixed inside the stirring rod 3, moves along with the stirring rod 3 and operates when a power supply is switched on to heat the raw materials, the raw materials are heated more uniformly by the stirring rod 3, the heat melting effect is better, and the air circulation component 30 supplies air into the heat preservation box 1, the raw materials are favorably foamed, the temperature in the heat insulation box 1 is more uniform, the raw materials are favorably melted by heat, and the processing efficiency is improved.
Further, referring to fig. 2, 4 and 5, the heating assembly 10 includes an electromagnetic heating coil 11 and a heat conducting layer 12, and the heat conducting layer 12 is fixedly connected to the heat insulation box 1 and is located inside the heat insulation box 1; the electromagnetic heating ring 11 is fixedly connected with the heat conduction layer 12 and is positioned between the heat conduction layer 12 and the heat insulation box 1.
In this embodiment, 11 models of electromagnetic heating circle are DH9001, twine on the heat-conducting layer 12, the heat-conducting layer 12 is fixed the inner wall of insulation can 1 to adopt the heat conduction metal material to make, 11 switch on power supply operations of electromagnetic heating circle utilize the electromagnetic induction to generate heat, through the heat-conducting layer 12 transmits to in the insulation can 1, and then to raw materials in the insulation can 1 heat, make it melt, the operation on next step of being convenient for.
Further, referring to fig. 1 to 4, the stirring assembly 20 includes a driving motor 21 and a rotating rod 22, wherein the driving motor 21 is disposed on the cover plate 2; the rotating rod 22 is fixedly connected with the output end of the driving motor 21 and extends into the heat preservation box 1.
Further, referring to fig. 4, the stirring assembly 20 further includes a connecting rod 23 and a brush plate 24, the connecting rod 23 is fixedly connected to the rotating rod 22 and is located inside the heat insulation box 1; the brush plate 24 is fixedly connected with the connecting rod 23 and is located on one side of the connecting rod 23 far away from the rotating rod 22.
In this embodiment, driving motor 21 installs on apron 2, the output with transfer line fixed connection, drive dwang 22 rotates, dwang 22 runs through apron 2 stretches into insulation can 1's inside, and with 3 fixed connection of puddler drive puddler 3 is rotatory, and then stirs the raw materials, makes it even, is favorable to melting the mixture, connecting rod 23 is fixed dwang 22 is last, follows dwang 22 is rotatory, brush board 24 is the brush form, fixes connecting rod 23's tip, and with the inner wall cooperation of heat-conducting plate follows connecting rod 23 pivoted in, right the formula is scraped to the inner wall of heat-conducting plate, prevents that the raw materials from gluing to be in on the heat-conducting plate, and then make the stirring effect better, be favorable to improving work efficiency.
Further, referring to fig. 1, fig. 3 and fig. 5, the wind circulation assembly 30 includes a mounting cylinder 31, a connecting member 32 and a power member 33, wherein the mounting cylinder 31 is fixedly connected to the cover plate 2 and is located on a side of the cover plate 2 away from the incubator 1; the connecting member 32 is detachably connected to the mounting cylinder 31, and the power member 33 is located outside the incubator 1.
Further, referring to fig. 1 to 5, the connecting member 32 includes a telescopic tube 321 and a rubber ring 322, the telescopic tube 321 is detachably connected to the mounting tube 31 and is located on a side of the mounting tube 31 away from the cover plate 2; the rubber ring 322 is fixedly connected with the installation cylinder 31 and is located between the installation cylinder 31 and the extension pipe 321.
Further, referring to fig. 1 to 3, the power member 33 includes a fan housing 331, a blower 332 and an auxiliary component 333, wherein the fan housing 331 is fixedly connected to the telescopic pipe 321 and is located on a side of the telescopic pipe 321 away from the installation cylinder 31; the fan 332 is positioned on one side of the fan cover 331 away from the extension pipe 321; the auxiliary member 333 is detachably connected to the blower 332.
Further, referring to fig. 1 to 3, the auxiliary component 333 includes a mounting seat 3331 and a shock absorbing pad 3332, wherein the mounting seat 3331 is detachably connected to the blower 332 and is located outside the blower 332; the shock pad 3332 is fixedly connected to the mounting seat 3331 and is located between the mounting seat 3331 and the blower 332.
In this embodiment, the mounting cylinder 31 is mounted on the cover plate 2 and is communicated with the inside of the thermal insulation box 1, the extension pipe 321 is inserted into the mounting cylinder 31 and is communicated with the inside of the thermal insulation box 1, the rubber ring 322 is fixed on the mounting cylinder 31 and is located between the mounting cylinder 31 and the extension pipe 321, so that the extension pipe 321 is fixed more closely to the mounting cylinder 31, the fan housing 331 is fixed at the other end of the extension pipe 321, the fan 332 is DP4-72 in model number, is mounted on the ground through the mounting seat 3331 and is close to the fan housing 331, is powered on to operate, supplies air to the inside of the thermal insulation box 1 through the fan housing 331 and the extension pipe 321, is beneficial to foaming of raw materials, and utilizes air circulation to make the temperature in the thermal insulation box 1 more uniform, so that the raw materials are heated more uniformly, melt the effect better, shock pad 3332 adopts the rubber material to make, installs fan 332 with between the mount pad 3331, reduce the vibrations of fan 332 operation, and then the result of use is favorable to improving machining efficiency.
Referring to fig. 6, a method for foaming a chalk writing board PVC includes the following steps:
s101: obtaining raw materials, and uniformly stirring and mixing the raw materials by using a stirring rod 3 to obtain a mixed raw material;
s102: heating and melting the mixed raw material through the heating assembly 10, and meanwhile, operating the fan 332 to supply air to the mixed raw material to obtain a melted raw material;
s103: and extruding the melted raw materials through an extruder by a material injection die head, and cooling and shaping to obtain the product.
In this embodiment, firstly, the obtained raw material is put into the heat preservation box 1, the stirring rod 3 is driven to rotate by the stirring component 20, the raw material is uniformly stirred and mixed, then the raw material is heated by the heating component 10 and the heating wire 4 to be melted, meanwhile, the fan 332 runs, air is conveyed to the raw material through the air cover 331 and the extension tube 321, so that the raw material is foamed, the temperature in the heat preservation box 1 is more uniform, the raw material is heated more uniformly and melted more quickly, the processing speed is increased, and finally, the melted raw material is extruded by an extruder through the material injection die head and is cooled and shaped to obtain a product; the heating wires 4 which are circulated and moved by air are utilized to ensure that the raw materials are heated more uniformly, thereby accelerating the melting reaction and improving the production efficiency.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A chalk writing board PVC foaming device is characterized by comprising an insulation can, a heating assembly, a cover plate, a stirring assembly, a stirring rod, a heating wire and an air circulation assembly;
the heating assembly is fixedly connected with the insulation can, the cover plate is detachably connected with the insulation can and is positioned on one side of the insulation can, the stirring assembly is arranged on the cover plate and drives the stirring rod to rotate, the stirring rod is positioned in the insulation can, the heating wire is fixedly connected with the stirring rod and is positioned in the stirring rod, and the air circulation assembly supplies air to the insulation can.
2. The chalk writing board PVC foaming device of claim 1,
the heating assembly comprises an electromagnetic heating ring and a heat conducting layer, and the heat conducting layer is fixedly connected with the heat insulation box and is positioned on the inner side of the heat insulation box; the electromagnetic heating ring is fixedly connected with the heat conducting layer and is positioned between the heat conducting layer and the heat insulation box.
3. The chalk writing board PVC foaming device of claim 1,
the stirring assembly comprises a driving motor and a rotating rod, and the driving motor is arranged on the cover plate; the rotating rod is fixedly connected with the output end of the driving motor and extends into the heat preservation box.
4. The chalk writing board PVC foaming device of claim 1,
the wind circulation assembly comprises an installation cylinder, a connecting component and a power component, wherein the installation cylinder is fixedly connected with the cover plate and is positioned on one side of the cover plate, which is far away from the insulation can; the connecting component is detachably connected with the mounting cylinder, and the power component is positioned on the outer side of the heat preservation box.
5. The chalk writing board PVC foaming device of claim 4,
the connecting component comprises a telescopic pipe and a rubber ring, the telescopic pipe is detachably connected with the mounting cylinder and is positioned on one side of the mounting cylinder, which is far away from the cover plate; the rubber ring is fixedly connected with the mounting cylinder and is positioned between the mounting cylinder and the telescopic pipe.
6. The chalk writing board PVC foaming device of claim 5,
the power component comprises a fan cover, a fan and an auxiliary component, wherein the fan cover is fixedly connected with the telescopic pipe and is positioned on one side of the telescopic pipe, which is far away from the installation cylinder; the fan is positioned on one side of the fan cover, which is far away from the telescopic pipe; the auxiliary component is detachably connected with the fan.
7. The chalk writing board PVC foaming method is suitable for the chalk writing board PVC foaming equipment as described in claim 1, and is characterized by comprising the following steps:
obtaining raw materials, and uniformly stirring and mixing the raw materials by using a stirring rod to obtain a mixed raw material;
heating and melting the mixed raw material through a heating assembly, and meanwhile, supplying air to the mixed raw material through the operation of a fan to obtain a melted raw material;
and extruding the melted raw materials through an extruder by a material injection die head, and cooling and shaping to obtain the product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110935294.7A CN113492483A (en) | 2021-08-16 | 2021-08-16 | PVC foaming method and equipment for chalk writing board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110935294.7A CN113492483A (en) | 2021-08-16 | 2021-08-16 | PVC foaming method and equipment for chalk writing board |
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| Publication Number | Publication Date |
|---|---|
| CN113492483A true CN113492483A (en) | 2021-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110935294.7A Pending CN113492483A (en) | 2021-08-16 | 2021-08-16 | PVC foaming method and equipment for chalk writing board |
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| CN (1) | CN113492483A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113997488A (en) * | 2021-11-01 | 2022-02-01 | 浙江杭垫科技有限公司 | High-foaming rubber high-sealing oil pump gasket and production process thereof |
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| CN213563696U (en) * | 2020-11-11 | 2021-06-29 | 易县兴发建材有限公司 | Polyphenyl board raw material mixer |
| CN213830000U (en) * | 2020-11-24 | 2021-07-30 | 江苏协诚科技发展有限公司 | Foaming extrusion molding device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113997488A (en) * | 2021-11-01 | 2022-02-01 | 浙江杭垫科技有限公司 | High-foaming rubber high-sealing oil pump gasket and production process thereof |
| CN113997488B (en) * | 2021-11-01 | 2024-02-06 | 浙江杭垫科技有限公司 | High foaming rubber high sealing oil pump gasket and production process thereof |
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Application publication date: 20211012 |