How to make pencils in the factory

Colored pencil production process directory:

1. Graphite Preparation

- Crushing and screening graphite raw materials

- Mixing graphite powder with adhesive to form a graphite paste

2. Lead Core Formation

- Extrusion molding: Placing the graphite paste into an extruder and extruding it into lead core shape through high pressure

- Injection molding: Injecting the graphite paste into an injection molding machine and forming a lead core through injection molding

3. Drying and Curing

- Placing the formed lead core in a well-ventilated environment for drying and curing

- Methods to accelerate drying speed: Heating or UV radiation, etc.

4. Pencil Barrel Processing

- Selecting suitable wood as the pencil barrel material

- Cutting, polishing, and other processing of the wood

- Carrying out drying treatment to reduce moisture content and improve stability

5. Lead Core Insertion

- Inserting the dried and cured lead core into the pencil barrel

- Using adhesives such as glue or hot melt adhesive to fix the lead core onto the pencil barrel

6. Surface Treatment

- Treating the surface of the pencil barrel through painting, waxing, etc. to enhance appearance quality and grip performance

- Painting can be done in various colors and patterns to add decorative elements

- Waxing can increase the smoothness and water resistance of the pencil barrel

7. Printing and Decoration

- Printing brand logos, model numbers, or other necessary information on the pencil barrel according to requirements

- Conducting decoration treatments such as stickers, ribbons, etc. to increase personalization and attractiveness

8. Quality Inspection and Packaging

- Conducting quality inspection on the produced pencils to ensure compliance with standard requirements

- Packaging using paper boxes or plastic boxes to protect the pencils from damage

1. Graphite preparation:

Firstly, natural graphite raw materials need to be crushed and screened to remove impurities. Then, the graphite powder is mixed with a binder, such as water or colloidal solution, to form a graphite paste.

2. Lead core molding:

The graphite paste is placed in a lead core mold and compacted under pressure to form the desired shape. Common methods include extrusion molding and injection molding. Extrusion molding involves using an extruder to press the graphite paste into a lead core shape, while injection molding involves injecting the graphite paste into an injection molding machine to produce the lead core.

3. Drying and curing:

The formed lead core is placed in a well-ventilated environment for drying and curing. This process usually takes several days to ensure that the lead core is completely dry and cured. During the drying process, heating or ultraviolet radiation can be used to accelerate the drying speed.

4. Pencil barrel processing:

Suitable wood is selected as the material for the pencil barrel and undergoes cutting, polishing, and other processing treatments. Commonly used woods include pine and birch. The wood needs to be dried to reduce moisture content and improve stability.

5. Lead core insertion:

The dried and cured lead core is inserted into the pencil barrel, typically using an automatic assembly device. It is important to ensure that the lead core is inserted at the appropriate position and maintains a certain degree of tightness. Adhesives such as glue or hot melt adhesive can be used to secure the lead core to the pencil barrel.

6. Surface treatment:

The pencil barrel undergoes surface treatments such as painting or waxing to enhance appearance quality and grip performance. Painting can be done in various colors and patterns to add decorative elements to the pencils. Waxing can increase the smoothness and water resistance of the pencil barrel.

7. Printing and decoration:

As needed, brand logos, model information, or other details are printed on the pencil barrel, along with decorative treatments like stickers or

ribbons. These decorations can add personalization and attractiveness to the pencils.

8. Quality inspection and packaging:

The produced pencils are subject to quality inspection to ensure compliance with standard requirements. They are then packaged, typically using paper or plastic boxes, to protect them from damage during transportation. Packaging often includes product information, manufacturing date, and other relevant details.

This is the production of colored pencils step by step, I hope you can have a good knowledge to help, of course, if you want to understand more here there are videos you can watch!

H&B's factory has 13 years of experience in the production of pencils, strict production requirements, through a variety of multi-layer quality control, and strive to ensure product quality!