CN109016319A - A kind of polyurethane foaming device and its application method - Google Patents
A kind of polyurethane foaming device and its application method Download PDFInfo
- Publication number
- CN109016319A CN109016319A CN201810805396.5A CN201810805396A CN109016319A CN 109016319 A CN109016319 A CN 109016319A CN 201810805396 A CN201810805396 A CN 201810805396A CN 109016319 A CN109016319 A CN 109016319A
- Authority
- CN
- China
- Prior art keywords
- tank body
- raw material
- top cover
- foaming device
- polyurethane foaming
- 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.)
- Granted
Links
- 238000005187 foaming Methods 0.000 title claims abstract description 46
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 22
- 239000004814 polyurethane Substances 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 17
- 238000013019 agitation Methods 0.000 claims abstract description 12
- 239000012535 impurity Substances 0.000 claims description 13
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 7
- 239000011496 polyurethane foam Substances 0.000 claims description 7
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 238000003860 storage Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 238000009740 moulding (composite fabrication) Methods 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 1
- 239000006260 foam Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000002788 crimping Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003466 welding Methods 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
- B29C44/3442—Mixing, kneading or conveying the foamable material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/10—Conditioning or physical treatment of the material to be shaped by grinding, e.g. by triturating; by sieving; by filtering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/06—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices
- B29B7/10—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary
- B29B7/12—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with single shaft
- B29B7/14—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with single shaft with screw or helix
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/06—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices
- B29B7/10—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary
- B29B7/12—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with single shaft
- B29B7/16—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with single shaft with paddles or arms
-
- 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
- B29C44/35—Component parts; Details or accessories
Abstract
The invention discloses a kind of polyurethane foaming device and its application methods, foam device includes tank body, disturbance plate and screen tray, the top of the tank body is fixedly connected with top cover by flange, it is crimped between the tank body and top cover and is fixed with screen tray, the power output end of the retarder is connected with agitating shaft, it is welded with helical blade and fixed link on the agitating shaft, disturbance plate is welded in the fixed link, the other side of the top cover is connected to vacuum pump by connecting tube.The present invention drives agitating shaft to rotate by motor low speed, using helical blade by foaming raw material out of tank body bottom to top vertical transport, the agitation in horizontal direction is carried out to foaming raw material using disturbance plate, and foaming raw material is filtered in agitation, tank interior is vacuumized using vacuum pump, using vacuum by bubble breaking in foamed material, foaming quality is improved.
Description
Technical field
The invention belongs to polyurethane foaming device technical fields, and in particular to a kind of polyurethane foaming device and its user
Method.
Background technique
Polyurethane combined material needs the process by foaming stirring, during polyurethane foam, meeting in process of production
Big calorimetric is generated, needs to radiate in time.
Such as application No. is the patents of CN201720123301.2, and it discloses a kind of for producing the height of polyurethane combined material
Quickly cooling but foam device is equipped with agitating device at least one described reaction kettle including at least two reaction kettles being set side by side,
The agitating device is connected with driving device, and each reactor bottom is equipped with a feed cycle mouth and a discharging circulation
Mouthful, each feed cycle mouth is connected with the discharging circulation port of other reaction kettles.In the technical solution of above-mentioned utility model,
It radiates, improves by the way that multiple reaction kettles interconnected are arranged, and using the process that reactant circulates between multiple reaction kettles
Radiating efficiency, simultaneously because settable agitating device in multiple reaction kettles, therefore can be for the reactant phase after heat dissipation
Mixing speed should be changed, to promote reaction rate.
But above scheme is had following defects that in use since in foaming process, polyurethane material inside can shape
At bubble structure, in addition, above-mentioned apparatus can not be filtered removal of impurities to polyurethane material, final influence polyurethane foam material
Quality.
Summary of the invention
The purpose of the present invention is to provide a kind of polyurethane foaming device and its application methods, to solve above-mentioned background technique
The problem of middle proposition.
To achieve the above object, it the invention provides the following technical scheme: a kind of polyurethane foaming device, including tank body, disturbs
The top of movable plate and screen tray, the tank body is fixedly connected with top cover by flange, crimps and is fixed between the tank body and top cover
Screen tray is equipped with retarder at the top center of the top cover, and the power intake of the retarder is connected to the output of motor
Axis, the power output end of the retarder are connected with agitating shaft, are welded with helical blade and fixed link on the agitating shaft,
Disturbance plate is welded in the fixed link, the side of the top cover is equipped with feed inlet, and the other side of the top cover passes through company
Adapter tube is connected to vacuum pump.
Preferably, the bottom center of the tank body is equipped with discharge port, and the tank body welding is fixed on bracket.
Preferably, the fixed link is distributed in the middle part of the spiral spacer of conveying blade.
Preferably, the positive bottom of the disturbance plate is welded with holding tank, and the disturbance plate is sieved by 60 mesh stainless steels
Net integrated molding is made, and the back side of the disturbance plate is weldingly fixed on retainer, and the retainer is weldingly fixed on fixation
On bar.
Preferably, the screen tray is made of two semicircle sieve plate splicings, and the edge of the semicircle sieve plate is equipped with crimping
Portion, the middle part of the semicircle sieve plate are welded with semicircle fixing sleeve, and the semicircle fixing sleeve is spliced into circular hole, and
Circular hole 2-3cm is passed through at the top of helical blade and helical blade is bonded with the inner wall of circular hole, and the semicircle sieve plate is 50 by mesh number
Mesh stainless steel mesh punch forming.
Preferably, sealing ring is additionally provided between the top and top cover of the tank body.
Meanwhile the invention also discloses a kind of application methods of polyurethane foaming device, specific steps are as follows:
S1: polyurethane foam raw material is added in tank body by feed inlet for charging, and keeps liquid level lower than screen tray, starting electricity
Machine drives agitating shaft to be stirred raw material by motor, starts vacuum pump；
S2: using helical blade can bottom and passes through semicircle to top vertical transport constantly out of tank body by foaming raw material
The circular hole that fixing sleeve is formed is fallen on screen tray, is filtered to large granular impurity；
S3: utilizing disturbance plate, the agitation in horizontal direction can be carried out to foaming raw material, and former to foaming in agitation
Material is filtered, and impurity is collected storage by holding tank；
S4: being vacuumized tank interior using vacuum pump, using vacuum by bubble breaking in foamed material, improves foaming quality；
S5: the material for completing foaming is discharged by discharge port, periodically tank interior is cleaned using clear water.
Preferably, the revolving speed of the motor is 40-60r/min, and the pressure of the vacuum pump is 0.03-0.08MPa.
Technical effect and advantage of the invention:
The present invention drives agitating shaft to rotate by motor low speed, can be by foaming raw material constantly from tank body using helical blade
Interior bottom is fallen on screen tray to top vertical transport, and by the circular hole that semicircle fixing sleeve is formed, and is carried out to large granular impurity
Filtering, using disturbance plate, the agitation that can be carried out in horizontal direction to foaming raw material can be right using the reticular structure of spoiler
Bubble is crushed, and is filtered in agitation to foaming raw material, and is collected impurity by holding tank and is deposited
Storage, is vacuumized tank interior using vacuum pump, using vacuum by bubble breaking in foamed material, improves foaming quality.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is disturbance plate structural schematic diagram of the invention；
Fig. 3 is screen tray overlooking structure diagram of the invention；
Fig. 4 is enlarged structure schematic diagram at A in Fig. 1 of the invention.
In figure: 1 motor, 2 retarders, 3 vacuum pumps, 4 connecting tubes, 5 tank bodies, 6 disturbance plates, 601 holding tanks, 7 brackets, 8 spiral shells
Vane piece, 9 agitating shafts, 10 feed inlets, 11 retainers, 12 screen trays, 121 semicircle sieve plates, 122 semicircle fixing sleeves, 123 crimping
Portion, 13 sealing rings, 14 top covers, 15 fixed links, 16 discharge ports.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the scope of protection of the invention.
As shown in Figs 1-4, a kind of polyurethane foaming device, including tank body 5, disturbance plate 6 and screen tray 12, the tank body 5
Top is fixedly connected with top cover 14 by flange, crimps between the tank body 5 and top cover 14 and is fixed with screen tray 12, the top cover 14
Top center at retarder 2 is installed, the power intake of the retarder 2 is connected to the output shaft of motor 1, the deceleration
The power output end of device 2 is connected with agitating shaft 9, and helical blade 8 and fixed link 15 are welded on the agitating shaft 9, described
Disturbance plate 6 is welded in fixed link 15, the side of the top cover 14 is equipped with feed inlet 10, and the other side of the top cover 14 is logical
It crosses connecting tube 4 and is connected to vacuum pump 3.
The bottom center of the tank body 5 is equipped with discharge port 16, and the tank body 5 is weldingly fixed on bracket 7.
The fixed link 15 is distributed in the middle part of the spiral spacer of conveying blade 8.
The positive bottom of the disturbance plate 6 is welded with holding tank 601, and the disturbance plate 6 is by 60 mesh stainless steel mesh
Integrated molding is made, and the back side of the disturbance plate 6 is weldingly fixed on retainer 11, and the retainer 11 is weldingly fixed on solid
In fixed pole 15, the structural strength of disturbance plate 6 is improved using retainer 11, avoids disturbance plate 6 from deforming, passes through disturbance plate 6
Rotation, can be filtered polyurethane foam material, and impurity is collected into holding tank 601.
The screen tray 12 is made of two semicircle splicings of sieve plate 121, and the edge of the semicircle sieve plate 121 is equipped with crimping
Portion 123, pressure contact portion 123 are pressed between tank body 5 and top cover 14, and the middle part of the semicircle sieve plate 121 is welded with half
Round fixing sleeve 122, the semicircle fixing sleeve 122 is spliced into circular hole, and circular hole 2-3cm and spiral shell are passed through at the top of helical blade 8
Vane piece 8 is bonded with the inner wall of circular hole, and the semicircle sieve plate 121 is 50 mesh stainless steel mesh punch formings by mesh number, is utilized
Screen tray 12, is filtered polyurethane foam material, removes impurity.
It is additionally provided with sealing ring 13 between the top and top cover 14 of the tank body 5, improves sealing effect.
Meanwhile the invention also discloses a kind of application methods of polyurethane foaming device, specific steps are as follows:
S1: polyurethane foam raw material is added in tank body 5 by feed inlet 10, and keeps liquid level lower than screen tray 12 by charging, is opened
Dynamic motor 1 drives agitating shaft 9 to be stirred raw material by motor 1, starts vacuum pump 3；
S2: using helical blade 8 can bottom and passes through semicircle to top vertical transport constantly out of tank body 5 by foaming raw material
The circular hole that shape fixing sleeve 122 is formed is fallen on screen tray 12, is filtered to large granular impurity；
S3: utilizing disturbance plate 6, the agitation in horizontal direction can be carried out to foaming raw material, and to foaming in agitation
Raw material is filtered, and impurity is collected storage by holding tank 601；
S4: will be vacuumized using vacuum pump 3 inside tank body 5, using vacuum by bubble breaking in foamed material, improve foaming matter
Amount；
S5: the material for completing foaming is discharged by discharge port 16, periodically using clear water to cleaning inside tank body 5.
The revolving speed of the motor 1 is 40-60r/min, and the pressure of the vacuum pump 3 is 0.03-0.08MPa.
The present invention drives agitating shaft 9 to rotate by 1 low speed of motor, can be by foaming raw material not using helical blade 8
The disconnected bottom out of tank body 5 is fallen on screen tray 12 to top vertical transport, and by the circular hole that semicircle fixing sleeve 122 is formed, right
Large granular impurity is filtered, and using disturbance plate 6, the agitation in horizontal direction can be carried out to foaming raw material, utilizes spoiler 6
Reticular structure, bubble can be crushed, and foaming raw material is filtered in agitation, and pass through holding tank
Impurity is collected storage by 601, will be vacuumized inside tank body 5 using vacuum pump 3, is broken bubble in foamed material using vacuum
It is broken, improve foaming quality.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features,
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (8)
1. a kind of polyurethane foaming device, including tank body (5), disturbance plate (6) and screen tray (12), it is characterised in that: the tank body
(5) top is fixedly connected with top cover (14) by flange, is crimped between the tank body (5) and top cover (14) and is fixed with screen tray
(12), it is equipped with retarder (2) at the top center of the top cover (14), the power intake of the retarder (2) is connected to
The power output end of the output shaft of motor (1), the retarder (2) is connected with agitating shaft (9), is welded on the agitating shaft (9)
It is fixed with helical blade (8) and fixed link (15), is welded with disturbance plate (6), the top cover on the fixed link (15)
(14) side is equipped with feed inlet (10), and the other side of the top cover (14) is connected to vacuum pump (3) by connecting tube (4).
2. a kind of polyurethane foaming device according to claim 1, it is characterised in that: the bottom centre of the tank body (5)
Place is equipped with discharge port (16), and the tank body (5) is weldingly fixed on bracket (7).
3. a kind of polyurethane foaming device according to claim 1, it is characterised in that: the fixed link (15) is distributed in defeated
In the middle part of the spiral spacer for sending blade (8).
4. a kind of polyurethane foaming device according to claim 1, it is characterised in that: the positive bottom of the disturbance plate (6)
Portion is welded with holding tank (601), and the disturbance plate (6) is made of 60 mesh stainless steel mesh integrated moldings, the disturbance
The back side of plate (6) is weldingly fixed on retainer (11), and the retainer (11) is weldingly fixed on fixed link (15).
5. a kind of polyurethane foaming device according to claim 1, it is characterised in that: the screen tray (12) is by two semicircles
Shape sieve plate (121) splicing composition, the edge of the semicircle sieve plate (121) are equipped with pressure contact portion (123), the semicircle sieve plate
(121) middle part is welded with semicircle fixing sleeve (122), and the semicircle fixing sleeve (122) is spliced into circular hole, and spiral shell
Circular hole 2-3cm is passed through at the top of vane piece (8) and helical blade (8) is bonded with the inner wall of circular hole, the semicircle sieve plate (121) by
Mesh number is 50 mesh stainless steel mesh punch formings.
6. a kind of polyurethane foaming device according to claim 1, it is characterised in that: the top and top of the tank body (5)
Sealing ring (13) are additionally provided between lid (14).
7. a kind of application method of polyurethane foaming device, it is characterised in that: specific steps are as follows:
S1: polyurethane foam raw material is added in tank body (5) by feed inlet (10), and keeps liquid level lower than screen tray by charging
(12), starting motor (1) drives agitating shaft (9) to be stirred raw material by motor (1), starts vacuum pump (3)；
S2: can be by foaming raw material constantly from tank body (5) interior bottom to top vertical transport using helical blade (8), and pass through
The circular hole that semicircle fixing sleeve (122) is formed is fallen on screen tray (12), is filtered to large granular impurity；
S3: utilizing disturbance plate (6), the agitation in horizontal direction can be carried out to foaming raw material, and to hair in agitation
Bubble raw material is filtered, and impurity is collected storage by holding tank (601)；
S4: will be vacuumized using vacuum pump (3) inside tank body (5), using vacuum by bubble breaking in foamed material, improve foaming
Quality；
S5: completing the material of foaming by discharge port (16) discharge, periodically cleans using clear water is internal to tank body (5).
8. a kind of application method of polyurethane foaming device according to claim 7, it is characterised in that: the motor (1)
Revolving speed be 40-60r/min, the pressure of the vacuum pump (3) is 0.03-0.08MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810805396.5A CN109016319B (en) | 2018-07-20 | 2018-07-20 | Polyurethane foaming device and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810805396.5A CN109016319B (en) | 2018-07-20 | 2018-07-20 | Polyurethane foaming device and using method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109016319A true CN109016319A (en) | 2018-12-18 |
| CN109016319B CN109016319B (en) | 2020-09-04 |
Family
ID=64644876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810805396.5A Active CN109016319B (en) | 2018-07-20 | 2018-07-20 | Polyurethane foaming device and using method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109016319B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110253816A (en) * | 2019-08-02 | 2019-09-20 | 张良芹 | A kind of chemical materials polyurethane foaming machine |
| CN110328797A (en) * | 2019-07-09 | 2019-10-15 | 临沂市博士爱文具有限公司 | A kind of production equipment of the foaming agent for ultralight clay |
| CN114368076A (en) * | 2021-12-21 | 2022-04-19 | 杭州雅飞机械制造有限公司 | High-molecular mixed material hand wheel process and equipment |
| CN114536637A (en) * | 2022-02-21 | 2022-05-27 | 安徽天马复合材料有限公司 | NBR metal composite foam material production equipment and production method thereof |
| US11527213B2 (en) | 2019-01-30 | 2022-12-13 | HKC Corporation Limited | Driving method of display panel for reducing viewing angle color deviation and display device |
| WO2023108358A1 (en) * | 2021-12-13 | 2023-06-22 | 袁建民 | Polyurethane foaming apparatus with cleaning function |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11527213B2 (en) | 2019-01-30 | 2022-12-13 | HKC Corporation Limited | Driving method of display panel for reducing viewing angle color deviation and display device |
| CN110328797A (en) * | 2019-07-09 | 2019-10-15 | 临沂市博士爱文具有限公司 | A kind of production equipment of the foaming agent for ultralight clay |
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| CN114368076A (en) * | 2021-12-21 | 2022-04-19 | 杭州雅飞机械制造有限公司 | High-molecular mixed material hand wheel process and equipment |
| CN114536637A (en) * | 2022-02-21 | 2022-05-27 | 安徽天马复合材料有限公司 | NBR metal composite foam material production equipment and production method thereof |
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| CN109016319B (en) | 2020-09-04 |
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