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Fiber grating sensor insert for injection molding product detection and manufacturing method thereof

A technology of fiber grating and injection molding products, which is applied in the transmission of sensing components, instruments, measuring devices and other directions using optical devices, which can solve the problems of difficult positioning and damage of sensors, and achieve the goal of reducing installation costs, improving survival rate and operability. Effect

Active Publication Date: 2017-07-18
SHANDONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Optical fiber can be used for on-line detection of temperature and strain after engraving grating. However, optical fiber is soft and vulnerable to high temperature and high pressure environment during product injection molding. In addition, the melt injected during injection molding has certain fluidity and will wash away the sensor. , making it difficult to locate the sensor in the product, therefore, it is a technical challenge to implant a fiber grating sensor in an injection molded product

Method used

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  • Fiber grating sensor insert for injection molding product detection and manufacturing method thereof
  • Fiber grating sensor insert for injection molding product detection and manufacturing method thereof
  • Fiber grating sensor insert for injection molding product detection and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] An injection-molded grating sensor insert for a filter plate of a diaphragm filter press

[0067] Such as figure 1 As shown, the insert is composed of a fiber grating for temperature measurement and a fiber grating for strain measurement. Three grating units are engraved on each fiber, and the central wavelengths of the grating units are 1512nm, 1516nm, and 1520nm respectively. The material of the optical fiber protective layer and the grating encapsulator is the same as that of the filter plate of the filter press, which is polypropylene. The thickness of the polypropylene protective layer of the grating is 1mm. Each grating pair has 3 grating wrappers. A hard and heat-resistant fiber optic fast connector is installed at the front of each fiber grating sensor. The connector includes embedded joints and external plugs.

[0068] A specific manufacturing method of a grating sensor insert for a filter plate of a diaphragm filter press in an injection molding process is as...

Embodiment 2

[0074] A Grating Sensor Insert for Strain Measurement of ABS Injection Molded Beam Structure

[0075] Such as image 3 As shown, the insert consists of only one strain measuring fiber grating, and two grating units are engraved on each optical fiber, and the central wavelengths of the grating units are 1532nm and 1540nm respectively. The optical fiber protection layer and the grating encapsulator are made of the same material as the beam structure, which is ABS resin. The ABS resin thickness of the grating protective layer is 0.8mm, and each fiber pair has 2 grating wrappers. Such as Figure 4 As shown, the positioning frame of the packager is a four-winged bracket, the fiber grating passes through the center of the packager, and a hard heat-resistant fiber optic quick connector is installed at the front of each grating sensor. The connector includes a built-in joint and an external plug.

[0076] The specific manufacturing method of an ABS injection molded beam structure s...

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Abstract

The invention discloses a fiber grating sensor insert for injection molding product detection and a manufacturing method thereof. The insert comprises a temperature fiber grating, a strain fiber grating, grating encapsulators, protection layers and connectors; the temperature fiber grating and the strain fiber grating are arranged side by side, the temperature fiber grating comprises a plurality of conducting fibers and a plurality of grating unit zones, the strain fiber grating comprises a plurality of conducting fibers and a plurality of grating unit zones, the conducting fibers and the grating unit zones are disposed at intervals, the grating encapsulators protecting the grating unit zones are disposed on the temperature fiber grating and the strain fiber grating, the protection layers wrap the conducting fibers, and ends of the temperature fiber grating and the strain fiber grating are provided with the connectors. The insert can be conveniently and reliably implanted in a product injection molding process, so a temperature sensor and a strain sensor are buried in a product, the sensors can be positioned, and the sensors can be guaranteed to be live in a high-temperature and high-voltage condition of injection molding; and the sensors are seamlessly embedded into the product, so measurement accuracy and the service lives of the sensor can be substantially improved.

Description

technical field [0001] The invention relates to an optical fiber grating sensor insert used for detection of injection molding products and a manufacturing method thereof. Background technique [0002] The injection molding process is to inject molten plastic or plastic-based composite materials into the mold under pressure, and obtain various products after cooling and molding. Injection molding, also known as injection molding, has the advantage of high production efficiency and can produce products of various shapes. The resulting article is often the final product and requires no further processing prior to installation or use as the final product. Many details of the product, such as protrusions, ribs, threads, can be molded in a single injection molding operation. [0003] Industrial sensors are one of the key technical means to realize the intelligence of the manufacturing industry. In modern industrial production, especially in the automated production process, var...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D5/353G01D21/02
CPCG01D5/353G01D21/02
Inventor 贾玉玺郭云力安立佳董琪叶慧高琳琳王庆林周勇
Owner SHANDONG UNIV
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