CN219926923U - Glass fiber reinforced plastic pultrusion graded heating preforming device - Google Patents
Glass fiber reinforced plastic pultrusion graded heating preforming device Download PDFInfo
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- CN219926923U CN219926923U CN202321451639.2U CN202321451639U CN219926923U CN 219926923 U CN219926923 U CN 219926923U CN 202321451639 U CN202321451639 U CN 202321451639U CN 219926923 U CN219926923 U CN 219926923U
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- glass fiber
- heating
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- wire
- wire feeding
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 103
- 239000011152 fibreglass Substances 0.000 title claims abstract description 29
- 239000003365 glass fiber Substances 0.000 claims abstract description 85
- 238000007493 shaping process Methods 0.000 claims abstract description 10
- 239000011521 glass Substances 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 6
- 239000010959 steel Substances 0.000 claims abstract description 6
- 238000007598 dipping method Methods 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 8
- 238000002791 soaking Methods 0.000 claims 1
- 239000012779 reinforcing material Substances 0.000 abstract description 30
- 238000000034 method Methods 0.000 abstract description 7
- 239000000463 material Substances 0.000 description 13
- 238000004804 winding Methods 0.000 description 6
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 5
- 235000017491 Bambusa tulda Nutrition 0.000 description 5
- 241001330002 Bambuseae Species 0.000 description 5
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 5
- 239000011425 bamboo Substances 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- 238000009787 hand lay-up Methods 0.000 description 4
- 238000004513 sizing Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 102100040287 GTP cyclohydrolase 1 feedback regulatory protein Human genes 0.000 description 1
- 101710185324 GTP cyclohydrolase 1 feedback regulatory protein Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000005056 cell body Anatomy 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000005007 epoxy-phenolic resin Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000010137 moulding (plastic) Methods 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002990 reinforced plastic Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000005341 toughened glass Substances 0.000 description 1
- 229920006305 unsaturated polyester Polymers 0.000 description 1
- 238000009756 wet lay-up Methods 0.000 description 1
Abstract
The utility model discloses a glass fiber reinforced plastic pultrusion graded heating preforming device which comprises a base, wherein a plurality of support columns are arranged on the upper end face of the base, a glass fiber roller is arranged on one side above the base, a branching component is arranged on one side of the glass fiber roller, a graded heating component is arranged on one side of the branching component, which is far away from the glass fiber roller, an impregnating component is arranged between the graded heating component and the branching component, and a preforming template is arranged on one side of the impregnating component, which is far away from the graded heating component. This product is through preheating cover between glass fiber roller and the separated time subassembly to reinforcing material preheats, thereby prevent when carrying out the separated time to reinforcing material, reinforcing material fracture, and in order to make this device be convenient for go on preforming, heat reinforcing material in the preforming, and different shaping position heating temperature is different, thereby when solving glass steel and need processing, process different shapes through different temperatures heating temperature.
Description
Technical Field
The utility model relates to the technical field of composite material preforming devices, in particular to a glass fiber reinforced plastic pultrusion graded heating preforming device.
Background
The pultrusion process is a composite material forming process, and the basic process is that fiber reinforced materials (carbon fiber or glass fiber roving, carbon fiber or glass fiber fabric and the like) are subjected to gum dipping, preforming device and hot die curing under the traction of external force to obtain a section product;
glass fiber reinforced plastics, also known as GFRP, fiber reinforced plastics, generally refer to reinforced plastics using glass fibers to reinforce unsaturated polyester, epoxy resin and phenolic resin matrices, glass fibers or products thereof as reinforcing materials, known as glass fiber reinforced plastics, or glass fiber reinforced plastics, are different from tempered glass in two general categories, wet contact and dry compression molding. For example, the method includes hand lay-up molding, lamination molding, RTM method, extrusion method, compression molding, winding molding, etc. according to the technological characteristics. The hand lay-up molding includes hand lay-up, bag pressing, spraying, wet lay-up low pressure and no-mould hand lay-up. The utility model provides a glass steel section bar pultrusion technology is with preheating forming device, including the heating cabinet, heating cabinet lateral surface fixed mounting has the heating chamber, heating chamber lateral surface sliding connection has the spacing groove, the spacing groove is the open cell body in upper portion, spacing tank bottom side fixed mounting has the supporting leg, during operation, the motor work, adjust heating cabinet and heating chamber to suitable height after, the motor stops working, then water injection to the heating intracavity, then open the heating pipe and heat the heating chamber, after the temperature in the heating chamber reaches suitable temperature, pour into the mould in the heating cabinet with the molding compound, the motor work at this moment, slightly rock the sizing material for after the sizing material reaches relative horizontality, the motor stops working, then impregnate glass fiber yarn, wherein the setting of heating intracavity water inlet, delivery port and heating pipe can heat the heating cabinet.
Similar to the preheating forming device for the glass fiber reinforced plastic profile pultrusion process, the following defects exist at present: according to the device, the heating box can be heated through the arrangement of the water inlet, the water outlet and the heating pipe in the heating cavity, so that the temperature in the heating box is kept at 20-30 ℃, the motor in the limiting groove, the first bevel gear, the second bevel gear, the lead screw, the sliding block and the fixing plate are arranged, the heating box and the heating cavity can be moved up and down, and the sizing material in the heating box can be slightly rocked when the heating box moves up and down, so that the sizing material reaches a relative horizontal state, but when the glass fiber reinforced plastic is heated, objects with different shapes, such as a glass fiber reinforced plastic round tube, a glass fiber reinforced plastic square tube, a glass fiber reinforced plastic rectangular tube, a glass fiber reinforced plastic round bar and a glass fiber reinforced plastic I-steel, are heated at different temperatures, so that glass fiber reinforced plastic molding is facilitated, and graded heating is needed.
Accordingly, in view of the above, research and improvement on the existing structure and defects have been conducted, and a glass fiber reinforced plastic pultrusion stage heating preforming device is proposed to achieve the purpose of having more practical value.
Disclosure of Invention
The utility model aims to provide a glass fiber reinforced plastic pultrusion graded heating preforming device, which aims to solve the problem that in the background art, glass fiber reinforced plastic needs to be processed into objects with different shapes, so that the objects need to be heated at different temperatures.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a glass steel draws hierarchical heating preforming device, includes the base, the up end of base is provided with a plurality of support column, one side of base top is provided with the glass fiber roller, and one side of glass fiber roller is provided with the separated time subassembly, one side that the glass fiber roller was kept away from to the separated time subassembly is provided with hierarchical heating element, hierarchical heating element includes the heating support frame, and one side and the opposite side setting of heating support frame are provided with incoming line and outlet respectively, the heating support frame comprises heating frame and expansion bracket, and the inner chamber of heating support frame is provided with the gliding roller train of support glass fiber line, the inner wall surface of heating frame is provided with electric heater, and electric heater is provided with three groups, the inner chamber of base is provided with the temperature controller of control electric heater temperature, be provided with the flooding subassembly between hierarchical heating element and the separated time subassembly, and one side that the hierarchical heating element was kept away from to flooding subassembly is provided with the preforming template.
Further, the wire distributing assembly comprises a first wire feeding roller and a second wire feeding roller, a wire loosening column is arranged between the first wire feeding roller and the second wire feeding roller, one ends of the first wire feeding roller and the second wire feeding roller are respectively provided with a first driven gear and a second driven gear, and the first driven gear and the second driven gear form a gear transmission structure with a driving motor through a driving gear.
Further, the wire-thinning teeth are arranged on the outer diameter surfaces of the first wire feeding roller and the second wire feeding roller at equal intervals, bearings are arranged on the contact surfaces of the first wire feeding roller, the second wire feeding roller and the supporting columns, the driving gear and the second driven gear form a gear meshing structure through the first driven gear, and a power supply port for a motor, an electric heater and a temperature controller to work is arranged on the side wall of the base.
Further, the dipping component comprises a dipping tank and a guide rod, a wire feeding bracket is arranged on one side of the dipping tank, the guide rod is arranged above the center position of the bottom end surface of the inner cavity of the dipping tank, and two ends of the guide rod are fixedly connected with the wire feeding bracket through a supporting rod.
Further, a first motor is arranged on one side of the glass fiber roller, a driving wheel at the output end of the first motor and a driven wheel at one end of the glass fiber roller form a belt type transmission structure through a transmission belt, and a wire outlet end of the wire distributing assembly, a wire inlet end of the dipping assembly and a wire inlet of the grading heating assembly are arranged on the same horizontal plane.
Further, a preheating cover is arranged between the glass fiber roller and the branching assembly, and the preheating cover is positioned on the same horizontal plane with the wire outlet end of the glass fiber roller and the wire inlet end of the branching assembly.
Compared with the prior art, the utility model has the beneficial effects that: the product preheats the reinforcing material (glass fiber roving) through the preheating cover between the glass fiber roller and the branching assembly, so that the reinforcing material (glass fiber roving) is prevented from being broken when the reinforcing material (glass fiber roving) is branched, in order to facilitate the device to perform preforming, the reinforcing material (glass fiber roving) is heated in preforming, and the heating temperatures of different forming parts are different, so that the problem that when glass fiber reinforced plastics need to be processed, different shapes are processed through different heating temperatures is solved;
the device drives the first motor to rotate through the glass fiber roller, so that the reinforced material (glass fiber roving) is separated through the preheating cover, the reinforced material (glass fiber roving) is separated through the first wire feeding roller, the second wire feeding roller, the wire-thinning column and the driving motor in the separating assembly, and the wire-thinning teeth on the first wire feeding roller and the second wire feeding roller are matched with the wire-thinning column to separate the wound reinforced material (glass fiber roving) so as to enable the reinforced material (glass fiber roving) to be wound in the preformed template;
the device heats the reinforcing material (glass fiber roving) passing through the inner cavity of the heating frame through the heating support frame, the heating frame, the expansion frame, the wire inlet, the wire outlet, the roller group and the electric heater in the grading heating assembly, and the reinforcing material (glass fiber roving) is different in shape during shaping, so that the temperature used by the part needing shaping is also different, the heating temperature is used for processing different shapes through different temperatures, the electric heater is provided with three groups, the temperature of each group of electric heaters is controlled through the temperature controller, and the reinforcing material (glass fiber roving) is subjected to three-stage temperature classification so as to perform grading heating preforming on the reinforcing material (glass fiber roving).
Drawings
FIG. 1 is a schematic diagram of the front view structure of a glass fiber reinforced plastic pultrusion stage heating preforming device;
FIG. 2 is a schematic diagram showing the front view of a graded heating assembly of a glass fiber reinforced plastic pultrusion graded heating preforming device;
FIG. 3 is a schematic side view of a branching assembly of a glass fiber reinforced plastic pultrusion stage heating preform apparatus according to the present utility model.
In the figure: 1. a base; 2. a support column; 3. a glass fiber roller; 301. a first motor; 4. a branching assembly; 401. a first wire feed roller; 402. a second wire feed roller; 403. a wire-thinning column; 404. a driving motor; 5. a staged heating assembly; 501. heating the support frame; 5011. a heating rack; 5012. a telescopic frame; 502. a wire inlet; 503. a wire outlet; 504. a roller set; 505. an electric heater; 6. an impregnating assembly; 601. an immersion tank; 602. a guide rod; 7. and (5) preforming the template.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-3, the present utility model provides a technical solution: the utility model provides a glass steel pultrusion graded heating preforming device, including base 1, the up end of base 1 is provided with a plurality of support column 2, one side of base 1 top is provided with glass fiber roller 3, and one side of glass fiber roller 3 is provided with separated time subassembly 4, separated time subassembly 4 includes first wire roller 401 and second wire roller 402, be provided with the thick bamboo 403 between first wire roller 401 and the second wire roller 402, and one end of first wire roller 401 and second wire roller 402 is provided with first driven gear and second driven gear respectively, first driven gear and second driven gear constitute gear transmission structure through driving gear and driving motor 404, the external diameter surface equidistance of first wire roller 401 and second wire roller 402 is provided with the bearing, and the driving gear constitutes gear engagement structure through first driven gear and second driven gear, drive first motor 301 rotation through glass fiber roller 3, thereby make the reinforcing material (glass fiber roving) carry out winding on the thick bamboo in advance the thick bamboo (glass fiber roller) and the glass fiber roller 402 through the preliminary winding subassembly of the first driven gear and the glass fiber roller 403 when the preliminary winding of the thick bamboo (glass fiber roller) is passed through the preliminary winding subassembly 403, thereby the thick bamboo wire material is wound on the glass fiber roller (glass fiber roller 402) and the glass fiber roller 402 is strengthened in the separated time respectively, the glass fiber roller 401 is wound wire winding wire material (the glass fiber roller is provided with a wire roller is provided with a bearing;
the wire branching component 4 is provided with a graded heating component 5 on one side far away from the glass fiber roller 3, the graded heating component 5 comprises a heating support frame 501, one side and the opposite side of the heating support frame 501 are respectively provided with a wire inlet 502 and a wire outlet 503, the heating support frame 501 is composed of a heating frame 5011 and a telescopic frame 5012, the inner cavity of the heating support frame 501 is provided with a roller group 504 for supporting glass fiber wire sliding, the inner wall surface of the heating frame 5011 is provided with an electric heater 505, the electric heater 505 is provided with three groups, the inner cavity of the base 1 is provided with a temperature controller for controlling the temperature of the electric heater 505, the side wall of the base 1 is provided with a power supply port for the operation of the motor, the electric heater 505 and the temperature controller, the reinforced material (glass fiber roving) passing through the inner cavity of the heating frame 5011 is heated through the heating support frame 501, the heating frame 5012, the wire inlet 502, the wire outlet 503, the roller group 504 and the electric heater 505, as the reinforced material (glass fiber roving) is different in shape when being shaped, the temperature used in the part requiring shaping is also different, the temperature of the roving is heated by the different shape, the different temperature of the roving is heated by the different temperature, and the electric heater 505 is controlled by the different temperature of the different groups, the temperature of the roving groups, respectively, the glass roving is shaped by the temperature is shaped by the three groups, and the temperature of the glass roving (glass fiber roving, the glass fiber is shaped by the different temperature and the temperature is respectively shaped;
the utility model provides a be provided with the flooding subassembly 6 between hierarchical heating element 5 and the separated time subassembly 4, the flooding subassembly 6 includes flooding groove 601 and guide arm 602, one side of flooding groove 601 is provided with the wire feeding support, guide arm 602 sets up the top at flooding groove 601 inner chamber bottom face central point, and the both ends of guide arm 602 pass through branch and wire feeding support fixed connection, one side of glass fiber roller 3 is provided with first motor 301, and the action wheel of first motor 301 output constitutes belt transmission structure through the driving belt with the driven pulley of glass fiber roller 3 one end, the leading-in end of separated time subassembly 4 and the leading-in end of flooding subassembly 6 and the inlet 502 of hierarchical heating element 5 set up at same horizontal plane, and one side that the flooding subassembly 6 kept away from hierarchical heating element 5 is provided with preformed template 7, be provided with the preheating cover between glass fiber roller 3 and the separated time subassembly 4, and the leading-in of preheating cover and glass fiber roller 3 is in same horizontal plane with the wire feeding of separated time subassembly 4, preheat reinforcing material (glass fiber roving) through the preheating cover between glass fiber roller 3 and the separated time subassembly 4, thereby prevent to carry out fracture to reinforcing material (glass fiber roving) when carrying out reinforcing material (glass fiber roving) and the glass roving (glass fiber roving) is not twisted, and the different shaping is carried out at different shaping temperature, thereby the different heating device need carries out, the shaping at different shaping is carried out.
Working principle: when a glass fiber reinforced plastic pultrusion graded heating preforming device is used, a glass fiber roller 3 is wound with a reinforcing material (glass fiber roving), the reinforcing material (glass fiber roving) is separated by a separating component 4 after being heated, a glue solution is fully impregnated by an impregnating component 6, finally, the glass fiber roller 3 is wound in a preforming template 7 by a graded heating component 5, a first motor 301 is driven to rotate, so that the reinforcing material (glass fiber roving) is separated by a preheating cover, the reinforcing material (glass fiber roving) is separated by a first wire feeding roller 401, a second wire feeding roller 402, a wire-thinning column 403 and a driving motor 404 in the separating component 4, the wire-thinning teeth on the first wire feeding roller 401 and the second wire feeding roller 402 are matched with the wire-thinning column 403 during separation, so that the wound reinforcing material (glass fiber roving) is separated so as to be wound in the preformed template 7, the reinforcing material (glass fiber roving) passing through the inner cavity of the heating frame 5011 is heated through the heating support frame 501, the heating frame 5011, the telescopic frame 5012, the wire inlet 502, the wire outlet 503, the roller group 504 and the electric heater 505 in the grading heating assembly 5, the reinforcing material (glass fiber roving) is shaped differently, the temperature used for the part requiring shaping is also different, the heating temperature is processed into different shapes through different temperatures, and the electric heaters 505 are provided with three groups, the temperature of each group of electric heaters 505 is controlled respectively through the temperature controller, whereby the reinforcing material (glass fiber roving) is subjected to three-stage temperature classification so as to perform stage heating preforming of the reinforcing material (glass fiber roving), the reinforcing material (glass fiber roving) is preheated by a preheating cover between the glass fiber roller 3 and the branching unit 4, thereby preventing breakage of the reinforcing material (glass fiber roving) when branching the reinforcing material (glass fiber roving), and the reinforcing material (glass fiber roving) is heated at the preforming in order to facilitate the preforming of the apparatus, thereby solving the problem that the glass fiber reinforced plastics need to be processed by processing different shapes by heating temperatures at different temperatures.
Claims (6)
1. The utility model provides a glass steel draws hierarchical heating preforming device of crowded, includes base (1), its characterized in that: the utility model provides a glass fiber forming die, including base (1), base (1) up end is provided with a plurality of support column (2), one side of base (1) top is provided with glass fiber roller (3), and one side of glass fiber roller (3) is provided with separated time subassembly (4), one side that glass fiber roller (3) was kept away from to separated time subassembly (4) is provided with hierarchical heating element (5), hierarchical heating element (5) are including heating support frame (501), and one side and the opposite side of heating support frame (501) are provided with incoming line (502) and outlet (503) respectively, heating support frame (501) comprises heating frame (5011) and expansion bracket (5012), and the inner chamber of heating support frame (501) is provided with support glass fiber line gliding roller set (504), the inner wall surface of heating frame (5011) is provided with electric heater (505), and electric heater (505) are provided with three group, the inner chamber of base (1) is provided with the temperature controller of control electric heater (505) temperature, be provided with between hierarchical heating element (5) and separated time subassembly (4), and soaking element (6) keep away from one side (7) of preliminary heating template shaping.
2. A glass fiber reinforced plastic pultrusion stage heating preforming device according to claim 1, wherein: the wire distributing assembly (4) comprises a first wire feeding roller (401) and a second wire feeding roller (402), a wire-thinning column (403) is arranged between the first wire feeding roller (401) and the second wire feeding roller (402), a first driven gear and a second driven gear are respectively arranged at one ends of the first wire feeding roller (401) and the second wire feeding roller (402), and the first driven gear and the second driven gear form a gear transmission structure through a driving gear and a driving motor (404).
3. A glass fiber reinforced plastic pultrusion stage heating preforming device according to claim 2, wherein: the wire-thinning teeth are arranged on the outer diameter surfaces of the first wire feeding roller (401) and the second wire feeding roller (402) at equal intervals, bearings are arranged on the contact surfaces of the first wire feeding roller (401) and the second wire feeding roller (402) and the supporting columns (2), the driving gear and the second driven gear form a gear meshing structure through the first driven gear, and a power supply port for a motor, an electric heater (505) and a temperature controller to work is formed in the side wall of the base (1).
4. A glass fiber reinforced plastic pultrusion stage heating preforming device according to claim 1, wherein: the dipping component (6) comprises a dipping tank (601) and a guide rod (602), a wire feeding bracket is arranged on one side of the dipping tank (601), the guide rod (602) is arranged above the center of the bottom end surface of the inner cavity of the dipping tank (601), and two ends of the guide rod (602) are fixedly connected with the wire feeding bracket through the support rods.
5. A glass fiber reinforced plastic pultrusion stage heating preforming device according to claim 1, wherein: one side of the glass fiber roller (3) is provided with a first motor (301), a driving wheel at the output end of the first motor (301) and a driven wheel at one end of the glass fiber roller (3) form a belt type transmission structure through a transmission belt, and a wire outlet end of the wire distributing component (4) and a wire inlet end of the dipping component (6) and a wire inlet (502) of the grading heating component (5) are arranged on the same horizontal plane.
6. A glass fiber reinforced plastic pultrusion stage heating preforming device according to claim 1, wherein: a preheating cover is arranged between the glass fiber roller (3) and the branching assembly (4), and the preheating cover and the wire outlet end of the glass fiber roller (3) and the wire inlet end of the branching assembly (4) are positioned on the same horizontal plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321451639.2U CN219926923U (en) | 2023-06-08 | 2023-06-08 | Glass fiber reinforced plastic pultrusion graded heating preforming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321451639.2U CN219926923U (en) | 2023-06-08 | 2023-06-08 | Glass fiber reinforced plastic pultrusion graded heating preforming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219926923U true CN219926923U (en) | 2023-10-31 |
Family
ID=88502350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321451639.2U Active CN219926923U (en) | 2023-06-08 | 2023-06-08 | Glass fiber reinforced plastic pultrusion graded heating preforming device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219926923U (en) |
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2023
- 2023-06-08 CN CN202321451639.2U patent/CN219926923U/en active Active
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