阅读说明：本技术 Qfrp光缆加强芯生产中增强树脂在基材纤维中浸润效果的设备 (Equipment for enhancing infiltration effect of resin in base material fiber in production of QFRP optical cable reinforcing core ) 是由 刘文正 孟凯 于 2019-02-12 设计创作，主要内容包括：本发明专利公开了热塑性树脂采用拉挤工艺生产QFRP光缆加强芯,增强树脂在基材纤维中浸润效果的新型设备,使产品性能有很大提升,且能够达到或超过采用热固性树脂拉挤生产出的产品性能,解决了行业普遍存在的热塑性树脂浸润度不够、性能偏低的问题。(The invention discloses novel equipment for producing a QFRP optical cable reinforcing core by thermoplastic resin through a pultrusion process and enhancing the infiltration effect of the resin in base material fibers, which greatly improves the product performance, can reach or exceed the product performance produced by thermosetting resin pultrusion, and solves the problems of insufficient infiltration degree and low performance of the thermoplastic resin commonly existing in the industry.)

1. The equipment for enhancing the soaking effect of the resin in the base material fiber in the production of the QFRP optical cable reinforced core is characterized in that: the open resin mold groove is changed into the closed resin mold groove, a special structure is designed in the resin mold groove, the base material fiber is enabled to move in an S shape, frequency conversion type ultrasonic vibration is carried out, the resin is fed, and the resin is enabled to be more easily soaked into the base material fiber in a mode that a melt pump is adopted to increase the pressure in the cavity of the resin mold groove.

2. The special structure designed inside the resin mold slot according to claim 1, wherein the base material fiber is S-shaped, characterized in that: in the resin mold groove, beams perpendicular to the base material fibers are added, and each beam is uniformly distributed between the base material fiber wire inlet hole and the base material fiber wire outlet hole and has the same height.

3. Changing an open resin mold cell to a closed resin mold cell according to claim 1, wherein: the resin mould groove is changed from a traditional open type to a closed type, namely an upper cover of the resin mould groove is closed, so that the resin mould groove can bear the pressure of more than 15 MPa.

4. The variable frequency ultrasonic oscillation according to claim 1, wherein: a variable-frequency ultrasonic oscillator is arranged at the bottom of the closed resin mold groove, and ultrasonic waves are utilized to enhance the fluidity of resin, improve the molecular motion speed and achieve better fusion of the resin and the base material fiber.

5. The use of a melt pump to increase the pressure inside a resin mold cavity as recited in claim 1, wherein: the pressure inside the mold cavity is increased by using a melt pump, molten resin is pumped into the resin mold groove cavity through a pressure-resistant pipeline, the pressurization range of the melt pump is about 20MPa, and the actual pressure in the using process is generally controlled to be about 8 MPa.

Technical Field

The invention discloses equipment for enhancing the infiltration effect of resin in base material fibers in the production of a QFRP optical cable reinforcing core, relates to the field of communication optical cables, and improves the product performance of an optical cable reinforcing material.

Background

With The development of optical communication, The popularization of Fiber To The Home (FTTH Fiber To The Home) and The wide application of 5G technology, a butterfly structure of an FTTH optical cable uses two QFRP type reinforced optical cable reinforced core products, so that The tensile strength requirement on The optical cable and The supporting effect on The optical Fiber are met, and The demand of The industry on The QFRP reinforced optical cable reinforced core is gradually increased.

In the production process of the product, the thermoplastic resin can not fully soak the base material fiber, so that the product can not achieve the required product performance, which is also a problem commonly existing in the industry.

Therefore, in order to solve the above problems, a new technical solution is provided to meet the requirement.

Disclosure of Invention

The invention aims to provide equipment for enhancing the infiltration effect of resin in base material fibers in the production of a QFRP optical cable reinforcing core.

The invention discloses equipment for enhancing the infiltration effect of resin in base material fibers in the production of a QFRP optical cable reinforcing core, and the effectiveness of the equipment improvement on the product performance improvement is verified through product performance comparison.

The common problem in the thermoplastic pultrusion industry is the resin infiltration problem, namely whether the resin can be sufficiently infiltrated into the gaps among the fibers of each base material determines the performance of the product.

The invention provides a method for changing an open resin mold groove into a closed resin mold groove, which is characterized in that: the resin mould groove is changed from a traditional open type into a closed type, the groove body of the resin mould groove is made of an iron plate with the thickness of 20mm, namely, the upper cover of the resin mould groove is closed, so that the resin mould groove can bear the pressure of more than 15 MPa.

Furthermore, the open resin mold groove simply stores thermoplastic resin in the resin mold groove, the resin is adhered to the surface of the base material fiber by means of the friction force between the base material fiber bundle and the resin, the base material fiber bundles cannot be separated from each other, and a larger contact area cannot be provided with the resin, so that the resin adhered to the base material fiber is limited, and each base material fiber bundle cannot be fully soaked with the resin.

Furthermore, the original resin mold groove and the upper cover are completely closed, only the front and back wire inlet holes and the front and back wire outlet holes are reserved, two or more holes are formed in the upper cover and are used as the resin inlet holes and the resin outlet holes, a pressure-resistant pipeline and a control valve are additionally arranged, the injected resin can bear the pressure of more than 15MPa after the control valve is closed and the wire inlet holes and the wire outlet holes are closed, and the possibility of resin overflow is avoided.

The invention provides a special structure designed in a resin mold groove to make base material fiber move in an S shape, which is characterized in that: in the resin mould groove, adding beams vertical to the base material fiber, and uniformly distributing each beam between the fiber inlet hole and the fiber outlet hole with the same height.

And furthermore, a cross beam is arranged in the resin mold groove, the cross beam is made of chromium-plated stainless steel or glass rods, the surface is smooth, and the base material fiber is not damaged. The height of the beam is the same as that of the wire inlet and outlet holes, the beam is uniformly distributed between the wire inlet and outlet holes, the number of the beam is controlled to be 3-7, and the wiring mode is as follows: after entering the wire inlet, the wire enters from the upper part of the first beam, enters the lower part of the second beam, the upper part of the third beam and …, and so on, and the number of the beams is generally odd. The purpose is that when the base material fiber bundle passes through the surfaces of all the cross beams, the surface of the bundle can be spread due to the action of tension, the contact area of the base material fiber monofilament and resin is increased, and the infiltration effect is increased.

The invention provides a frequency conversion type ultrasonic oscillation, which is characterized in that: a variable-frequency ultrasonic oscillator is arranged at the bottom of the closed resin mold groove, and ultrasonic waves are utilized to enhance the fluidity of resin, improve the molecular motion speed and achieve better fusion of the resin and the base material fiber.

Further, after the closed resin mold tank is filled with resin, in order to increase the diffusion speed of resin molecules into the base material fiber bundle, an ultrasonic oscillator is added, and the movement speed of the resin molecules is increased by using electromagnetic waves (mechanical waves) of 20 kilohertz to 50 megahertz to accelerate the diffusion of the resin into the base material fiber bundle.

The invention provides a method for increasing the internal pressure of a cavity by using a melt pump, which is characterized by comprising the following steps: the pressure in the cavity of the resin mold groove is increased by using a melt pump, the molten resin is pumped into the cavity of the resin mold groove through a pressure-resistant pipeline, the pressurization range of the melt pump is about 20MPa, and the actual pressure in the using process is generally controlled to be about 8 MPa.

Further, the pressurization by the melt pump means that the melt pump with the maximum pressurization range of 20MPa is used, molten resin is injected into the cavity of the closed resin mold through the pressure-resistant pipeline and the control valve described in 0009 of the specification, a certain flow is maintained, meanwhile, the substrate fiber ensures a certain traction speed, the outlet control valve is used for controlling the outlet flow rate and pressure of the melt resin, and the pressure in the mold is ensured to be controlled at 8 MPa.

In summary of the above description, the schematic diagram of the equipment for enhancing the infiltration effect of the resin in the base material fiber in the production of the QFRP optical cable reinforced core of the invention is shown in figure 1.

The invention has the advantages that: the principle is simple, the equipment is easy to process and purchase, the product infiltration effect is improved, and the product performance is greatly improved.

Drawings

FIG. 1 is a schematic view of the structure of a resin mold groove according to the present invention:

1. resin inlet pipe 2, control valve 3, resin mold groove upper cover 4, screw hole 5, resin inlet hole 6, resin mold groove cavity 7, outlet hole 8, cross beam 9, inlet hole 10, ultrasonic oscillator 11, melt pump 12, resin outlet pipe 13, resin mold groove 14, base material fiber 15, diaphragm type pressure gauge

Detailed Description

For the purpose of enhancing understanding of the present invention, the present invention will be further described in detail with reference to the following examples, which are provided for illustration only and are not to be construed as limiting the scope of the present invention.