How to choose a plastic pen making machine?

2025-02-25

To choose a plastic pen making machine includes clarify production requirements, material preparation, choose the right device type and so on.

There are large differences in pen making machine procurement prices and maintenance costs of machines used in the manufacturing process of ballpoint pens of different brands. The specific costs depend on the model, function and frequency of use of the machine.

Choosing a plastic pen making machine requires comprehensive consideration of multiple factors, including production efficiency, product quality, equipment accuracy, cost and technical requirements.

Clarify production requirements of choosing plastic pen making machine

Firstly, clarify the production scale and demand of plastic ballpoint pen. For example, is it small batch production or large-scale production? This will directly affect the selection of equipment and investment budget.

Then, determine the type of ballpoint pens you need to produce, such as metal pens, stylus, advertising gift pens, etc.

Clarify production needs and scale

Production requirements Select machine capacity based on daily/hourly production requirements. High-volume scenarios require large-capacity equipment (such as commercial production), while small-scale production focuses on flexibility. For example: If you need to produce millions of pens per year, you need to match a machine with a production capacity of thousands of pieces per hour.

Product specifications

The size, wall thickness, and geometric complexity of the pen tip directly affect the mold design and machine accuracy requirements. The specific dimensions of the product (length, width, height, wall thickness) must be provided.

Note: Plastic pen tips require a high-precision positioning system to ensure that the tip size error is ≤0.1mm

pen haichen injection

Material preparation of plastic pen making machine

Plastic type selection

Choose the right plastic according to the purpose of the pen (such as strength, transparency, chemical resistance). Common materials include polyethylene (PE), polypropylene (PP), ABS, polycarbonate (PC), etc.

PE/PP is low-cost and easy to process, suitable for ordinary pen bodies.
Transparent pen holders need to use acrylic (PMMA) or PC
Nylon can be used for high wear-resistant parts

Material performance matching

Consider fluidity (affecting injection molding filling), shrinkage (avoiding deformation), and heat resistance. Wrong material selection will lead to problems such as bubbles and silver streaks

Injection molding machine: used for injection molding of plastic pen rods.
Metal processing equipment: such as lathes, drilling machines, grinding machines, etc., used for the processing of metal refills and pen caps.
Compression forming machine: for compression molding of metal parts.

Drying and dehumidification

Hygroscopic plastics (such as nylon, ABS, PC) must be preheated and dried (80–120°C), otherwise the water will vaporize during injection molding to produce bubbles or silver filaments.

Drying equipment must ensure uniform circulation of hot air.

Impurity filtration

Raw materials need to be screened and magnetically attracted to remove dust and metal impurities.

Additive preparation

Masterbatches, plasticizers, etc. need to be added in precise proportions and fully mixed by a high-speed kneader.
Lubricants (such as zinc stearate) can improve demoulding properties.

Choose plastic pen making machine: Choose the right device type

Plastic pen tip manufacturing machine

Plastic pen tip manufacturing machine includes the manufacturing of ball beads and the precision processing of pen tips. Ball beads usually made of stainless steel, tungsten carbide or other wear-resistant materials. And they made through forging, heat treatment, grinding and other steps.

Plastic ball Pen rod manufacturing device

Plastic pen rod is injection molded, while metal pen rod is processed and wood

Refill production line

Refill production line including refill oil injection machine, refill pipe puller, refill assembly machine, etc. These devices use for the production and assembly of refills.

Plastic pen rod production lin

including plastic pipe extruder, PP ballpoint pen rod extruder, PP ballpoint pen rod pipe puller, etc. These devices use in the production of pen holders.

Assembly equipment

Plastic ball pen assembly equipment such as automatic assembly machine, it can realize automatic assembly of parts. Such as pen holder, pen cap, refill core, pen tip, etc.

Plastic ball pen making machine technical parameters and performance

Injection molding machine accuracy

Injection pressure and rate: affect the material filling effect, need to match the material fluidity.
Temperature control system: high-precision temperature control (±1℃) ensures uniform plasticization of the material and reduces defects.
Clamping force: calculated based on the product projection area and material pressure to avoid overflow.
Energy consumption index: preferred energy-saving design (such as power system optimization) to reduce long-term costs.

200T injection molding amchine

Equipment stability and safety

Structural reliability: The machine needs to run smoothly and with low noise (noise ≤ industry standard), and the key components (screw, barrel) need to be highly durable.
Safety protection Cold start protection: Startup is prohibited if the material has not reached the temperature.
Explosion-proof design: When in contact with flammable materials, it must comply with explosion-proof standards.

Plastic ball pen injection making machine assembling robot

Production speed

The production speed of assembling robots depends on the specific model and assembly task, but generally, the robots can achieve efficient and automated assembly. For example, automatic cylindrical grinders and automatic cylindrical grinders can achieve efficient automatic assembly.

Accuracy

The assembly accuracy of the robot is very high, reaching the level of three thousandths of a millimeter to ensure the precise fit between the pen tip and the pen holder.