Preparation method of thermoplastic plastic and composite material resistance welding element thereof
A technology of thermoplastics and composite materials, applied in chemical instruments and methods, synthetic resin layered products, single-component synthetic polymer rayon, etc., can solve problems such as many pores, cumbersome laying process, and poor welding quality
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[0035] Such as figure 1 and figure 2 Shown, the preparation method of a kind of thermoplastics of the present invention and composite resistance welding element thereof, the steps are as follows:
[0036] Step (1), surface treatment of the conductive grid: use chemical or physical methods to carry out surface treatment on the conductive grid, then perform ultrasonic cleaning, put it into an oven for drying, and obtain such as figure 1 Conductive grid after physical or chemical surface treatment shown in (a).
[0037]Step (2), electrospinning: Wrap the conductive grid 2 around the middle of the rotating roller 13, and fix the end of the conductive grid 2 with adhesive tape, turn on the rotating roller motor 3 to make the rotating roller 13 reach the spinning speed. The spinning solution is injected into the syringe 11, and then the syringe 11 is installed on the pusher base 5 and fixed by the syringe fixing clip 10, and the pushing block 9 is pushed to contact with the pisto...
Embodiment 1
[0040] Embodiment 1: Preparation of a resistance welding element suitable for polyetheretherketone (PEEK) resin-based fiber-reinforced composite materials.
[0041] Step (1), select a stainless steel mesh with a mesh number of 150 as the conductive mesh, use a 5mol / L hydrogen chloride (HCL) solution to etch for 30 minutes, use acetone as a cleaning solution to perform ultrasonic cleaning for 30 minutes, and put it in an oven for drying.
[0042] Step (2), the polyetherimide (PEI) particle is dissolved in the dimethylformamide (DMF) solvent and is heated and stirred to prepare the spinning solution of the concentration of 15%, the PEI spinning solution is sucked in the syringe, and The syringe and the conductive grid after step (1) drying are installed on the electrospinning machine, and the outer diameter is 0.6mm. The electrospinning needle is put on, the spinning distance is set to 20cm, the spinning voltage is 20KV, and the spinning speed is 400r / min, the pushing speed is ...
Embodiment 2
[0048] Embodiment 2: Preparation of a resistance welding element suitable for polyetherimide (PEI) resin-based fiber-reinforced composite materials.
[0049] Step (1), select T700 carbon fiber plain weave fabric as the conductive grid, use atmospheric pressure low-temperature jet plasma equipment to carry out surface treatment on the conductive grid, the input gas is high-purity air, the input pressure is 0.6MPa, and then alcohol is used as the cleaning solution. Ultrasonic cleaning for 30 minutes, put into the oven to dry.
[0050] Step (2), the polyetherimide (PEI) particle is dissolved in the dimethylformamide (DMF) solvent and is heated and stirred to prepare the spinning solution of the concentration of 15%, the PEI spinning solution is sucked in the syringe, and The syringe and the conductive grid after step (1) drying are installed on the electrospinning machine, and the outer diameter of the electrospinning needle is 0.6mm, and the spinning distance is set to 20cm, the...
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