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Method for making pencil with waste plastic

A technology of waste plastics and waste plastics, which is applied in the direction of non-mechanical pencils, recycling technology, furniture waste recycling, etc., can solve the problems of unrecyclable slag, high production costs, and high cost prices, so as to save manpower, reduce prices, and use long life effect

Inactive Publication Date: 2005-05-18
何炳志
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fields and corners can be seen everywhere. Due to the large consumption of pencils, waste plastics are used instead of wooden pencils. Chinese invention patent CN1334204. A large amount of petroleum energy is consumed to produce plastics, and the world's non-renewable petroleum is very tight, and the price has skyrocketed. The price of plastics produced from petroleum has doubled in recent years. The cost of producing pencils from plastics is high and requires a large amount of petroleum energy consumption; Second: the price of plastic is high. Compared with waste plastic, the price of plastic is 5-6 thousand yuan per ton higher than that of waste plastic. Although it is overkill for a large number of disposable pencils, the production cost is high. , which is not conducive to market acceptance, and the slag foam that the pencil cuts during use cannot be recycled; third: the formula ratio of the patented polystyrene, polypropylene, talcum powder, starch, and foaming agent, the formula's Starch can play a role in the degradation of plastics in about 3 months, especially when there are different smells flying in the air, and many hand creams contain glycerin, so plastics, starch, glycerin and suitable gases are mixed together, that would degrade the pencil faster

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method of using waste plastics to make pencils is as follows:

[0023] 1. Classify, wash and dry the recycled waste plastics according to the needs;

[0024] 2. Put each kind of waste plastic into a plastic recycling granulator to process it into standard granules, and sort and stack them;

[0025] 3. First, the ingredients are required according to the weight of the pencil core component (Kg):

[0026] Graphite powder: 75 Calcium stearate: 6

[0027] Stearamide: 1 Polystyrene: 19

[0028] 4. According to the weight (Kg) of the pencil shaft component, the ingredients are required:

[0029] Polystyrene: 40 Polyethylene: 23

[0030] Talc powder: 35 Foaming agent: 2

[0031] 5. According to the weight of the pencil skin component (Kg), the ingredients are required:

[0032] Polystyrene: 98 Pigment: 1

[0033] Cornstarch: 1

[0034] 6. Put the prepared ingredients of pencil core, pencil shaft and pencil skin into the barrel of the injection machine respectively. T...

Embodiment 2

[0038] A method of using waste plastics to make pencils is as follows:

[0039] 1. Wash and dry the recycled waste plastics according to the needs;

[0040] 2. Put each kind of waste plastic into a plastic recycling granulator to process it into standard granules, and sort and stack them;

[0041] 3. First, the ingredients are required according to the weight of the pencil core component (Kg):

[0042] Graphite powder: 60 Calcium stearate: 9

[0043] Stearamide: 5 Polystyrene: 26

[0044] 4. According to the weight (Kg) of the pencil shaft component, the ingredients are required:

[0045] Polystyrene: 15 Polyethylene: 22

[0046] Talc powder: 60 Foaming agent: 3

[0047] 5. According to the weight of the pencil skin component (Kg), the ingredients are required:

[0048] Polystyrene: 80 Pigment: 10

[0049] Cornstarch: 10

[0050] 6. Put the prepared ingredients of pencil core, pencil shaft and pencil skin into the barrel of the injection machine respectively. The melti...

Embodiment 3

[0054] A method of using waste plastics to make pencils is as follows:

[0055] 1. Classify, wash and dry the recycled waste plastics according to the needs;

[0056] 2. Put each kind of waste plastic into a plastic recycling granulator to process it into standard granules, and sort and stack them;

[0057] 3. First, the ingredients are required according to the weight of the pencil core component (Kg):

[0058] Graphite powder: 30 Calcium stearate: 14

[0059] Stearamide: 8 Polystyrene: 48

[0060] 4. According to the weight (Kg) of the pencil shaft component, the ingredients are required:

[0061] Polystyrene: 30 Polyethylene: 30

[0062] Talc powder: 39 Foaming agent: 1

[0063] 5. According to the weight of the pencil skin component (Kg), the ingredients are required:

[0064] Polystyrene: 90 Pigment: 5

[0065] Cornstarch: 5

[0066] 6. Put the prepared ingredients of pencil core, pencil shaft and pencil skin into the barrel of the injection machine respectively. Th...

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PUM

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Abstract

The present invention is method and apparatus for making pencil with waste plastic. Pencil is produced through injecting the molten plastic components for black lead, pencil shaft and pencil coating separately into a mold in a jet molding machine; cooling in cooling tank, drawing with a drawing machine, cutting and packing in 12 pieces each box. The present invention has the advantages of utilization of waste plastic to reduce waste in resource and environmental pollution, pencil capable of being sharpened like a wood one, less break of the black lead, once formation of the black lead, the pencil shaft and the pencil coating, etc.

Description

technical field [0001] The invention relates to the technical field of writing utensils, in particular to a method for making pencils from waste plastics. Background technique [0002] Everyone knows that pencils are the first tool for learning, ten years of cold windows, starting with pencils. One can imagine the universality and importance of pencils. The formation of pencils is mainly formed by the combination of wood and lead. With the development of human beings and the importance of environmental protection, it is impossible to cut down a large amount of wood for pencils. Using ordinary trees to make pencils is a waste of life and money, because miscellaneous trees have many scars, and problems such as partial cores and broken cores are prone to occur when sharpening pencils. And a large number of felling of trees not only brings a lot of natural disasters to human beings. A tree that has grown to 30 years can only produce 30,000 to 40,000 penc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00B43K19/16
CPCY02W30/78
Inventor 何炳志何炳胜何茂良
Owner 何炳志