CN108621360B - Mould for preparing polyurethane foam wedge wave-absorbing material - Google Patents
Mould for preparing polyurethane foam wedge wave-absorbing material Download PDFInfo
- Publication number
- CN108621360B CN108621360B CN201810721334.6A CN201810721334A CN108621360B CN 108621360 B CN108621360 B CN 108621360B CN 201810721334 A CN201810721334 A CN 201810721334A CN 108621360 B CN108621360 B CN 108621360B
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- CN
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- Prior art keywords
- frame
- frame plate
- holes
- shaped
- plate
- Prior art date
- Legal status (The legal status 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 status listed.)
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Links
- 239000011358 absorbing material Substances 0.000 title claims abstract description 24
- 229920005830 Polyurethane Foam Polymers 0.000 title claims abstract description 20
- 239000011496 polyurethane foam Substances 0.000 title claims abstract description 20
- 238000009434 installation Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Classifications
-
- 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
- B29C44/58—Moulds
- B29C44/585—Moulds with adjustable size of the mould cavity
-
- 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
- B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
Abstract
The invention relates to a die for preparing polyurethane foam wedge wave-absorbing materials, which comprises a female die, a bottom frame and a top frame, wherein the lower part of the female die is fixedly arranged in the bottom frame, and the top frame is arranged on the end face of the upper part of the female die; the female mold is formed by arranging rectangular pyramid-shaped cavity molds which are uniformly distributed and have the same appearance, the rectangular pyramid-shaped cavity molds are formed by splicing templates which have the same appearance, and the templates are isosceles triangle plates. The beneficial effects of the invention are as follows: the invention has simple structure and convenient installation, and is suitable for preparing polyurethane foam wedge wave-absorbing materials in small batches; meanwhile, the adjustable wedge wave-absorbing material can be prepared at different angles by only changing the waist length of the template and adjusting the bottom frame.
Description
Technical Field
The invention relates to the field of wave-absorbing materials, in particular to a die for preparing a polyurethane foam wedge wave-absorbing material.
Background
The electromagnetic wave absorbing material is a material capable of absorbing and attenuating incident electromagnetic waves, converting the electromagnetic energy into heat energy and dissipating the heat energy, and has wide application in military and civil fields such as electromagnetic compatibility and the like. In general, the electromagnetic wave absorbing materials which are all in the shape of wedges are paved on the inner wall of the microwave darkroom, and the shapes of the wedges can guide incident electromagnetic waves to reflect for multiple times in the wedges, so that the absorption loss is greatly increased, and the reflection of the metal wall of the darkroom is reduced, thereby realizing the test environment of simulating open fields by using the microwave darkroom. The most common wedge wave-absorbing material is polyurethane foam, and by researching various absorbents such as carbon penetration and the like in a polyurethane foam base material and adding flame retardants, anti-aging agents and the like, the performance of the polyurethane wedge wave-absorbing material is greatly improved, and the polyurethane wedge wave-absorbing material has various characteristics such as wide wave-absorbing frequency band, high temperature resistance, flame resistance, light weight and the like (see patent CN104445934B, CN103289641B, CN108084694A and the like). When the performance of the polyurethane foam wedge wave-absorbing material is researched and improved, samples with various component ratios are needed to be prepared for comparison test, and different wedge angles are sometimes needed to be prepared, and the sample size is small due to inconsistent components and is limited by cost and time, so that the device is not suitable for a large-scale cutting device used in industrial production. Based on the above, the invention provides a die for preparing the polyurethane foam wedge wave-absorbing material, which is easy to process, simple to mount and disassemble and quite suitable for preparing the polyurethane foam wedge wave-absorbing material in small batches.
Disclosure of Invention
The invention aims to provide a die for preparing a polyurethane foam wedge wave-absorbing material, which has the characteristics of easiness in processing, simplicity in installation and disassembly and is suitable for preparing the polyurethane foam wedge wave-absorbing material in small batches.
The invention adopts the following technical scheme: the mold for preparing the polyurethane foam wedge wave-absorbing material comprises a female mold, a bottom frame and a top frame, wherein the lower part of the female mold is fixedly arranged in the bottom frame, and the top frame is arranged on the end face of the upper part of the female mold; the female mold is formed by arranging rectangular pyramid-shaped cavity molds which are uniformly distributed and have the same appearance, the rectangular pyramid-shaped cavity molds are formed by splicing templates which have the same appearance, and the templates are isosceles triangle plates.
The bottom frame consists of an upper frame plate, a lower frame plate, a screw rod and a screw cap, wherein the upper frame plate is positioned above the lower frame plate, and the upper frame plate and the lower frame plate are fixedly connected through the screw rod and the screw cap; the upper frame plate is of a rectangular plate-shaped structure, round through holes are formed in four corners of the upper frame plate, and square through holes which are uniformly distributed and have the same appearance are formed in the middle of the upper frame plate; the lower frame plate is of a rectangular plate-shaped structure, round through holes are formed in four corners of the lower frame plate, the hole distances of the round through holes are equal to those of the round through holes of the upper frame plate, fang Tongkong which are uniformly distributed and have the same appearance are arranged in the middle of the lower frame plate, the center hole distances of the square through holes are equal to those of the square through holes of the upper frame plate, and the appearance size of the square through holes is smaller than that of the square through holes of the upper frame plate.
The top frame consists of an inner frame and an outer frame, the inner frame is positioned on the upper end face of the female die, and the outer frame is positioned on the outer side of the inner frame for a circle and surrounds the female die; the inner frame is of a square frame structure and is formed by fixedly connecting four corner plates, and the external dimension of the bottom end face of the inner frame is consistent with the external dimension of the upper end face of the female die; the outer frame is formed by combining two U-shaped frames with the same appearance through bolt connection, each U-shaped frame is formed by angle plates, and the U-shaped opening size of the U-shaped frame is larger than or equal to the appearance size of the upper end face of the female die.
The U-shaped frame is characterized in that two ends of the U-shaped frame are provided with lug plates perpendicular to the end faces, and mounting through holes are formed in the lug plates.
The beneficial effects of the invention are as follows: the invention has simple structure and convenient installation, and is suitable for preparing polyurethane foam wedge wave-absorbing materials in small batches; meanwhile, the adjustable wedge wave-absorbing material can be prepared at different angles by only changing the waist length of the template and adjusting the bottom frame.
Drawings
Fig. 1 is a cross-sectional view of the overall structure of the present invention.
Fig. 2 is a top view of the overall structure of the present invention.
Fig. 3 is a schematic view of an upper frame plate of the present invention.
Fig. 4 is a schematic view of a lower frame plate of the present invention.
Fig. 5 is a bottom view of the outer frame of the present invention.
In the figure, 1, a female die, 2, an upper frame plate, 3, a lower frame plate, 4, a screw, 5, a nut, 6, a template, 7, a top frame, 8, an outer frame, 9, an inner frame, 10, a U-shaped frame, 11, an ear plate, 12 and a rectangular pyramid-shaped cavity die.
Detailed Description
The invention is described in further detail below with reference to the drawings.
As shown in fig. 1, 2, 3, 4 and 5, a mold for preparing a polyurethane foam wedge wave-absorbing material comprises a female mold 1, a bottom frame and a top frame 7, wherein the lower part of the female mold 1 is fixedly arranged in the bottom frame, and the top frame 7 is arranged on the end surface of the upper part of the female mold; the female mold is formed by arranging rectangular pyramid-shaped cavity molds 12 which are uniformly distributed and have the same appearance, the rectangular pyramid-shaped cavity molds 12 are formed by splicing templates 6 which have the same appearance, and the templates 6 are isosceles triangle plates.
The bottom frame consists of an upper frame plate 2, a lower frame plate 3, a screw 4 and a screw cap 5, wherein the upper frame plate 2 is positioned above the lower frame plate 3, and the upper frame plate 2 and the lower frame plate are fixedly connected through the screw 4 and the screw cap 5, so that the distance between the upper frame plate and the lower frame plate can be adjusted; the upper frame plate 2 is of a rectangular plate-shaped structure, round through holes are formed in four corners of the upper frame plate, and square through holes which are uniformly distributed and have the same appearance are formed in the middle of the upper frame plate; the lower frame plate 3 is of a rectangular plate-shaped structure, round through holes are formed in four corners of the lower frame plate, the hole distances of the round through holes are equal to those of the round through holes of the upper frame plate 2, fang Tongkong which are uniformly distributed and have the same appearance are arranged in the middle of the lower frame plate 3, the center hole distances of the square through holes are equal to those of the square through holes of the upper frame plate 2, and the appearance size of the square through holes is smaller than that of the square through holes of the upper frame plate 2.
The top frame 7 consists of an inner frame 9 and an outer frame 8, wherein the inner frame 9 is positioned on the upper end surface of the female die 1, and the outer frame 8 is positioned on the outer side of the inner frame 9 for a circle and surrounds the female die 1; the inner frame 9 is of a square frame structure and is formed by fixedly connecting four corner plates, and the external dimension of the bottom end face of the inner frame is consistent with the external dimension of the upper end face of the female die 1; the outer frame 8 is formed by combining two U-shaped frames 10 with the same appearance through bolt connection, each U-shaped frame 10 is formed by angle plates, and the U-shaped opening size is larger than or equal to the appearance size of the upper end face of the female die 1. The inner frame is made of the angle plates, so that the smoothness and the parallel level of the frame opening can be ensured, and the foamed foam material can be conveniently cut.
The U-shaped frame 10 both ends all be provided with terminal surface vertically otic placode 11, be provided with the installation through-hole on the otic placode.
The application method of the invention comprises the following steps: firstly, installing a bottom frame, calculating the distance from the upper frame plate 2 to the lower frame plate 3 by using a trigonometric function according to the selected vertex angle of the template 6 and the side lengths of square through holes of the upper frame plate 2 and the lower frame plate 3, and adjusting and installing the bottom frame; the template 6 is sequentially inserted into square through holes at corresponding positions of the lower frame plate 3 along four edges of the square through holes of the upper frame plate 2 to form each rectangular pyramid-shaped cavity mold 12; finally, installing the top frame 7, firstly aligning the inner frame 9 with the outer edges of all the rectangular pyramid-shaped cavity molds 12, then surrounding the outer edges of all the rectangular pyramid-shaped cavity molds 12 by two U-shaped frames 10, and fixedly connecting the two U-shaped frames by bolts and nuts; after the installation, injecting polyurethane foam material for foaming, and cutting off redundant parts along the frame opening of the top frame after the foaming solidification. And finally, taking the solidified polyurethane foam material out of the mold upwards, keeping the wedge upwards placed on the ground, removing the U-shaped frame 10 and the inner frame 9, and removing the template 6 on the wedge to obtain the finished polyurethane foam wedge wave-absorbing material.
The invention is not described in detail in the prior art.
Claims (2)
1. A mould for preparing polyurethane foam wedge wave-absorbing material is characterized in that: the mold comprises a female mold, a bottom frame and a top frame, wherein the lower part of the female mold is fixedly arranged in the bottom frame, and the top frame is arranged on the end face of the upper part of the female mold; the female mold is formed by arranging rectangular pyramid-shaped cavity molds which are uniformly distributed and have the same appearance, the rectangular pyramid-shaped cavity molds are formed by splicing templates with the same appearance, and the templates are isosceles triangle plates;
the bottom frame consists of an upper frame plate, a lower frame plate, a screw rod and a screw cap, wherein the upper frame plate is positioned above the lower frame plate, and the upper frame plate and the lower frame plate are fixedly connected through the screw rod and the screw cap; the upper frame plate is of a rectangular plate-shaped structure, round through holes are formed in four corners of the upper frame plate, and square through holes which are uniformly distributed and have the same appearance are formed in the middle of the upper frame plate; the lower frame plate is of a rectangular plate-shaped structure, round through holes are formed in four corners of the lower frame plate, the hole pitch of the round through holes is equal to that of the round through holes of the upper frame plate, fang Tongkong which are uniformly distributed and have the same appearance are arranged in the middle of the lower frame plate, the center hole pitch of the square through holes is equal to that of the square through holes of the upper frame plate, and the appearance size of the square through holes is smaller than that of the square through holes of the upper frame plate;
the top frame consists of an inner frame and an outer frame, the inner frame is positioned on the upper end face of the female die, and the outer frame is positioned on the outer side of the inner frame for a circle and surrounds the female die; the inner frame is of a square frame structure and is formed by fixedly connecting four corner plates, and the external dimension of the bottom end face of the inner frame is consistent with the external dimension of the upper end face of the female die; the outer frame is formed by combining two U-shaped frames with the same appearance through bolt connection, each U-shaped frame is formed by angle plates, and the U-shaped opening size of the U-shaped frame is larger than or equal to the appearance size of the upper end face of the female die.
2. The mold for preparing the polyurethane foam wedge wave-absorbing material according to claim 1, wherein the mold comprises the following components: the U-shaped frame is characterized in that two ends of the U-shaped frame are provided with lug plates perpendicular to the end faces, and mounting through holes are formed in the lug plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810721334.6A CN108621360B (en) | 2018-07-04 | 2018-07-04 | Mould for preparing polyurethane foam wedge wave-absorbing material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810721334.6A CN108621360B (en) | 2018-07-04 | 2018-07-04 | Mould for preparing polyurethane foam wedge wave-absorbing material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108621360A CN108621360A (en) | 2018-10-09 |
| CN108621360B true CN108621360B (en) | 2024-02-09 |
Family
ID=63689486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810721334.6A Active CN108621360B (en) | 2018-07-04 | 2018-07-04 | Mould for preparing polyurethane foam wedge wave-absorbing material |
Country Status (1)
| Country | Link |
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| CN (1) | CN108621360B (en) |
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| CN105400018A (en) * | 2015-12-21 | 2016-03-16 | 中国科学院长春应用化学研究所 | Microporous wave-absorbing material with array-structure surface, and preparation method thereof |
| CN205835763U (en) * | 2016-06-27 | 2016-12-28 | 浙江瑞松橡塑科技有限公司 | A kind of road cone cone mould |
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| CN208410501U (en) * | 2018-07-04 | 2019-01-22 | 中国人民解放军61489部队 | A kind of mold being used to prepare polyurethane foam wedge wave absorbing material |
-
2018
- 2018-07-04 CN CN201810721334.6A patent/CN108621360B/en active Active
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| CA2032719A1 (en) * | 1989-12-21 | 1991-06-22 | Makoto Kamiyama | Production process of expansion-molded article |
| JP2000000810A (en) * | 1998-06-17 | 2000-01-07 | Toyo Tire & Rubber Co Ltd | Urethane formwork and its production |
| CN1243060A (en) * | 1998-07-29 | 2000-02-02 | 亨内克股份有限公司 | Method for processing flock power into foam-plastic blocks and apparatus thereof |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN108621360A (en) | 2018-10-09 |
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