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Glass fiber reinforced plastic pultrusion and grading heating pre-forming device and method

A graded heating and preforming technology, which is applied in the field of FRP pultrusion graded heating preforming device, can solve the problems that the product cannot be finally formed, the resin pot life is shortened, and the pultrusion production speed is reduced, so as to improve the product forming degree and pultrusion Speed, ensure internal and external curing, improve the effect of resin fluidity

Pending Publication Date: 2018-07-27
ZHONGFU CARBON FIBER CORE CABLE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to ensure complete solidification inside and outside of the product, the pultrusion production speed can only be reduced, resulting in a greatly reduced production efficiency
At the same time, the resin in the glue tank is affected by the external environment temperature and its own reaction, and the viscosity will gradually increase. When the fiber with the resin enters the mold, it will generate a lot of resistance, which will cause the pultrusion to rise and seriously cause the mold to be blocked.
In addition, due to the low temperature and high viscosity of the resin on the reflow board, it is usually difficult to flow back to the glue tank, but accumulates on the reflow board, resulting in waste of resin
If the temperature of the glue tank is increased blindly, the pot life of the resin is often shortened
For pultruded profiles, the yarn is very easy to run off, resulting in the failure of the product to be finally formed, which seriously leads to mold blocking

Method used

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  • Glass fiber reinforced plastic pultrusion and grading heating pre-forming device and method
  • Glass fiber reinforced plastic pultrusion and grading heating pre-forming device and method
  • Glass fiber reinforced plastic pultrusion and grading heating pre-forming device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1, with reference to figure 1 , figure 2 , a FRP pultrusion graded heating preforming device, the device includes a support frame composed of a number of support rods 1, on which a yarn threading plate 4, a yarn positioning plate 5 and a preforming Heating mold support plate 6, several yarn penetration holes 3 are distributed on the described yarn penetration plate 4 and yarn positioning plate 5; secondary preheating mold 8 is fixed on the preheating mold support plate 6, and the yarn positioning A first-level preheating mold 7 is fixedly installed on the plate 5; the device is also provided with a fixed connector 2, and the fixed connector 2 includes a fixed plate 21 and a support column 22 connected to support the fixed plate 21. The support frame is fixedly connected to the molding die 10 .

[0026] refer to figure 2 , the support column 22 is a cylindrical pin with internal thread. A connecting through hole 23 is provided on the fixing plate 21 , th...

Embodiment 2

[0032] Example 2, the cavity size of the primary preheating mold 7 is smaller than the cavity size of the secondary preheating mold 8, and the volume content of fibers in both mold cavities is 65%. The mold entrance and exit fillets of the primary preheating mold 7 and the secondary preheating mold 8 are larger than R20mm.

[0033] The length of the heating section of the first-stage preheating mold 7 and the second-stage preheating mold 8 is 20 cm. The first-level preheating mold 7 and the second-level preheating mold 8 are equipped with several temperature measuring holes 9, at least one of which is used to control heating, and at least one is used to calibrate the temperature.

[0034] The distance between the first-level preheating mold 7 and the second-level preheating mold 8 is 20cm; the second-level preheating mold 8 is 10cm from the entrance length of the forming mold 10; the first-level preheating mold 7 The length apart from threading plate 8 is 80cm.

[0035] All ...

Embodiment 3

[0036] Embodiment 3, a FRP pultrusion graded heating preforming method, the method uses the FRP pultrusion graded heating preforming device described in Embodiment 1 or 2, and the steps are as follows: the yarn soaked in the resin glue solution passes through the yarn passing plate 4. The middle part of the yarn enters the first-level preheating mold 7 from the yarn passing plate 4 and performs a first-level preheating at 100°C. Together enter the secondary preheating mold 8 and perform secondary preheating at 90°C to complete the graded heating preforming; then all the yarns enter the forming mold 10, and finally solidify and form.

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Abstract

The invention relates to a glass fiber reinforced plastic pultrusion and grading heating pre-forming device. The device comprises a supporting frame composed of a plurality of supporting rods, a reaching-in plate, a yarn positioning plate and a pre-heating mold supporting plate are sequentially and fixedly mounted on the supporting frame in the direction of yarn entering, and a plurality of reaching-in holes are distributed on the reaching-in plate and the yarn positioning plate; a second-stage preheating mold is fixed to the pre-heating mold supporting plate, and a first-stage preheating moldis fixedly mounted on the yarn positioning plate; the glass fiber reinforced plastic pultrusion and grading heating pre-forming device is further provided with a fixing connecting piece which comprises a fixing plate and a supporting column for being connected with and supporting the fixing plate, and the supporting frame is fixedly connected to a forming mold through the fixing connecting piece.The invention further provides a grading heating pre-forming method. The glass fiber reinforced plastic pultrusion and grading heating pre-forming device adopts multistage preheating and yarn positioning, the pultrusion speed can be increased, internal and external curing degrees are consistent, the in-mold resistance is reduced, a fiber deviation mold is avoided, and the product shape forming degree is good.

Description

technical field [0001] The invention relates to a composite material preforming device and a pultrusion forming process thereof, in particular to a glass fiber reinforced plastic pultrusion staged heating preforming device and a forming method thereof. Background technique [0002] The pultrusion process is a composite material forming process. The basic process is that fiber reinforced materials (carbon fiber or glass fiber roving, carbon fiber or glass fiber fabric, etc.) Device, heat mold curing, obtain profile products, and cut into a certain length according to the requirements of use. [0003] In the production of large cross-section FRP pultrusion profiles, various defects appear in the product due to the inconsistent heating degree inside and outside the product and the difference in curing degree. In order to ensure that the inside and outside of the product are fully cured, the pultrusion production speed can only be reduced, resulting in a greatly reduced product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/52B29C70/54
CPCB29C70/521B29C70/528
Inventor 任桂芳徐俊田超凯宋朝印王志伟庞中强刘传瑞王凯锋陈莹
Owner ZHONGFU CARBON FIBER CORE CABLE TECH
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