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Processing method for recycling fine powder material of phenolic plastic finished products

A phenolic molding compound and processing method technology, applied in the direction of plastic recycling, recycling technology, etc., can solve the problems of no way, too much fine powder, customers are not easy to use, etc., and achieve the effect of reducing production costs and reducing waste.

Active Publication Date: 2013-09-18
WUXI CHUANGDA ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, it needs to be screened after mixing. If it is not screened, there will be too much fine powder in the finished product, which is not easy for customers to use.
After screening, some fine powder can be added, but not too much, otherwise the fine powder will accumulate too much and cannot be processed
In fact, this method does not fundamentally solve the problem of fine powder recycling, but simply mixes and utilizes it, but it is still fine powder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A processing method for recycling the finished fine powder of phenolic molding compound, comprising the following steps:

[0025] a. Mixing of raw materials: Add 10 parts of phenolic resin and 15 parts of glass fiber to 100 parts of recycled phenolic molding compound finished fine powder, and then use a high-speed mixer to mix the above raw materials at a speed of 500 rpm for 30 minutes;

[0026] b. Machine preheating: Add the mixed raw materials to the feeding hopper of the screw extruder, turn on the main power of the screw extruder, and set the temperature of the three temperature zones. The initial setting temperature of the three temperature zones is one Zone 70°C, Zone 2 70°C, Zone 3 50°C, preheat for 20 minutes, after preheating, turn on the screw extruder and set the speed frequency to 25Hz;

[0027] c. Feeding heat treatment: Turn on the feeding, increase the feeding frequency from 0Hz to 30Hz, when the extruder head starts to extrude the powder, turn on the ch...

Embodiment 2

[0033] A processing method for recycling the finished fine powder of phenolic molding compound, comprising the following steps:

[0034] a. Mixing of raw materials: Add 7.4 parts of phenolic resin and 14.6 parts of glass fiber to 100 parts of recycled phenolic molding compound finished fine powder, and then use a high-speed mixer to mix the above raw materials at a speed of 500 rpm for 30 minutes;

[0035] b. Machine preheating: Add the mixed raw materials to the feeding hopper of the screw extruder, turn on the main power of the screw extruder, and set the temperature of the three temperature zones. The initial setting temperature of the three temperature zones is one Zone 70°C, Zone 2 70°C, Zone 3 50°C, preheat for 20 minutes, after preheating, turn on the screw extruder and set the speed frequency to 25Hz;

[0036] c. Feeding heat treatment: Turn on the feeding, increase the feeding frequency from 0Hz to 30Hz, when the extruder head starts to extrude the powder, turn on the...

Embodiment 3

[0042] A processing method for recycling the finished fine powder of phenolic molding compound, comprising the following steps:

[0043] a. Mixing of raw materials: Add 7.1 parts of phenolic resin and 12.5 parts of glass fiber to 100 parts of recycled phenolic molding compound finished fine powder, and then use a high-speed mixer to mix the above raw materials at a speed of 400 rpm for 35 minutes;

[0044] b. Machine preheating: Add the mixed raw materials to the feeding hopper of the screw extruder, turn on the main power of the screw extruder, and set the temperature of the three temperature zones. The initial setting temperature of the three temperature zones is one Zone 70°C, Zone 2 70°C, Zone 3 50°C, preheat for 20 minutes, after preheating, turn on the screw extruder and set the speed frequency to 25Hz;

[0045] c. Feeding heat treatment: Turn on the feeding, increase the feeding frequency from 0Hz to 30Hz, when the extruder head starts to extrude the powder, turn on the...

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Abstract

The invention discloses a processing method for recycling fine powder material of phenolic plastic finished products, which comprises the steps of: adding 6.25 to 10 parts of phenolic resin and 12.5 to 15 parts of fiberglass to 100 parts of recycled fine powder material of phenolic plastic finished products; mixing at high speed of 400 to 500 revolutions per minute for 30 to 35 minutes; adding the mixed raw material to a charging hopper of a screw extruding machine; preheating by a machine; setting the frequency of rotating speed of the screw extruding machine at 25 Hz; starting to charge; increasing the charging frequency from 0 Hz to 30 Hz; starting to freezing water when the extruding machine starts to extrude powder material; resetting the temperature of three temperature areas; measuring the temperature of the material by using an infrared temperature measuring instrument to ensure that the temperature of the material is controlled between 90 DEG C to 110 DEG C; pelleting and cooling; crushing and screening out; and recycling. The processing method has the advantages that the fine powder material of the phenolic plastic finished products is pelleted and used again; waste is reduced and production cost is reduced.

Description

technical field [0001] The invention relates to a processing method for recycling phenolic molding compound powder, in particular to a processing method for recycling fine powder of finished phenolic molding compound. Background technique [0002] Phenolic molding compound, commonly known as Bakelite powder, is a hard and brittle thermosetting plastic. It is a general term for plastics based on phenolic resin. It is one of the most important thermosetting plastics. It is widely used as electrical insulation materials, furniture parts, and daily necessities. , Handicrafts, etc. [0003] Phenolic molding compound is usually prepared by mixing raw materials, extruding, double-roller pressing into sheets, and cooling on the conveyor belt. After meeting the cooling requirements, it is crushed and screened by a pulverizer. [0004] The screening status of the above fine powder is: usually a combination of coarse screen and fine screen is used for screening. The aperture of the co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29B17/00B29B9/02C08L61/06C08K7/14
CPCY02W30/62
Inventor 章志平邱家会
Owner WUXI CHUANGDA ELECTRONICS