First, research and development background
The wooden pencil writing is smooth and silky, and it is the most commonly used writing instrument. It is also necessary for primary school students to learn. Wood pencils were invented in the age of wood resources. Today's wood resources are insufficient, and the use of a large amount of wood to make pencils has received much attention from the society. Because of the tight timber resources, the rising price of wood, the increasing cost of wood pencils, and the increasing price of pencils, the difficulties faced by companies making wood pencils are increasing.
Wood pencils also have the trouble of pencil sharpening, the disadvantages of dirty hands and the disadvantages of easy core breaking in use.
The search for alternatives to wood pencils began as early as the early 18th century, and the predecessors of the pen industry had worked hard. In 1822, there was the invention of a movable pencil. In 1950, China produced the first activity pencil. The movable pencil has the advantages of no wood and no cutting, but because the pencil lead is thin, it is easy to break during writing. Despite the popularity of the resin pencil lead in recent years, it does not completely overcome the defect that the movable pencil is easy to break the core, and is still not suitable for primary school students. .
In the early 1990s, bullet pencils appeared in the domestic market. The use of this pencil lead was divided into two stages.
In the first stage, the pencil core of the bullet is directly loaded into the core tube of the pen, and the core tube of the core tube is provided with a tongue spring. When used, the pen head pushes down the core tube, and the pencil core is pulled out by the weight of the pencil lead and the spring tongue. , clamped directly into the core tube collet. The advantages of this pen are obvious, and it is very popular because it does not use wood, and it does not need to use a pen to save money. However, at the time, this product had the following disadvantages: 1 Since the core tube needs to slide the core tube, there is a 201m core tube exposed, which makes the product very unattractive, and the style is simple. Small, the refill is easy to retract during writing. 3 Because the spring is easy to dislocate, resulting in no core, so that the pencil loses the function of changing the core. 4 In order to push the top of the pencil lead, a spring with a large elastic force is required, and the spring tongue with excessive elasticity is easily damaged. The core of the core tube shortens the life of the pen; 5 pencil core is easy to black fingers when changing. Although many manufacturers tried to change this shortcoming, they did not solve these problems fundamentally, so the product was only popular and quickly disappeared in the market.
The second stage: after each pencil core, a plastic piece is placed, and then the pencil core with the plastic head is sequentially loaded into the pen holder. When the core is changed, the front refill is pulled out from the front end of the pen and then pushed from the end of the pen. Into, it is obvious that this method is costly to use. It is also more troublesome to pull out and push in to replace the pencil lead. However, it can save the trouble of pencil sharpening. At present, it has a certain share in the market, and the manufacturer is mainly based on Baineng.
Since there is no ideal substitute for wood pencils, people have begun to study pencil-based wood technology. For various reasons, people have not found the ideal substitute wood products. The pencil family is still dominated by wood pencils.
Second, the establishment of research and development goals and research and development results
Today, in the environment where human beings depend on the environment, people hope to reduce the deforestation and wood consumption. They hope that there will be a real pencil without wood to better protect the natural environment.
Then primary school students are the main users of pencils. Pencil sharpening for children has become a necessary household chores for primary school students. Pencil sharpening also affects environmental hygiene. The survey showed that all parents of primary school students would like to have a pencil that does not need to cut the core and not dirty hands.
Therefore, we believe that the development of a pencil that does not use wood, does not need to be cut, does not dirty hands, continuous core, and low cost of use is the direction of pencil development. If it succeeds, it will work in the future. Therefore, we have determined this research topic for research and development, and made painstaking efforts.
In order to achieve this goal, based on the advantages of pencil products in the international and domestic markets, and based on our years of experience in production, after nearly four years of research and trial production, we have made substantial breakthroughs in technology. In the development process, we take the innovation of the core-cut pencil structure of the bullet pencil lead as the research object, and the research work focuses on three aspects, and then the combination of excellent and excellent, so that the goal can be achieved:
1. Pencil core is treated with film.
After a variety of material selection and repeated trials and tests, the material that has no natural side effects is finally selected as the film-forming material, and the film process is determined. The surface of the pencil-core of the bullet is treated with a film to ensure that it is in the pen. Do not dirty hands when assembling the pencil lead.
2, through a reasonable structural design, to ensure the reliability of the use of functions.
The position structure is respectively set on the inner wall of the pen holder and the outer tube wall of the core tube, so that the pen holder and the refill cannot rotate relative to each other; the hill-shaped protrusion is arranged on both sides of the rear end step of the long groove of the core tube, thereby effectively increasing the thickness of the step and The depth of the groove above the step prevents the spring tongue from dislocating. Through the above two technical features, it is ensured that each time a push stroke is completed, that is, a pencil core can be reliably replaced, and the service life of the pen can be repeated for more than 5,000 times. The anti-slip limit is arranged between the core tube and the pen holder or between the pen holder and the pen holder, so that the pen holder and the core tube are not separated, and the primary school student is prevented from being disassembled and cannot be used. A larger hole is provided at the rear end of the short groove of the core tube so that the spring tongue enters the hole to prevent the pencil lead from retracting during writing.
3. The exposed core tube is formed by concealing the core to complete the aesthetically pleasing shape design.
Under the premise of ensuring perfect function, through reasonable structural design, the core tube of the pen has a double-layer structure or the structure that the core tube and the cap can slide in the pen sleeve, and the science hides the storage for the core stroke. The core tube makes the appearance of the product more beautiful. According to this design idea, the style of this product can be compared with the existing luxury styles of ballpoint pens and movable pencils.
Through the combination of the above three aspects, the product has reliable performance and beautiful appearance, and has all the advantages of the wood pencil and the movable pencil, and better solves and overcomes the shortcomings of the existing various pencils. Really do not use wood, no need to cut, no dirty hands, and constantly core.
Third, the use of cost analysis
The average market price of wood pencils is about 0.36 yuan/piece, which can be cut 12 times for each pencil. The cost of using pencils is 0.03 yuan/time, while the retail price of film-cutting pencil-cores is only 0. 006 yuan / piece, plus the cost of using the pen case is 0.0004 yuan each time, that is, the cost of using each pencil lead is 0.0064 yuan, compared with the wood pencil, the use cost is 21.3% of the wood pencil. Saving 78.7%.
Fourth, the EIA analysis
The process of film-changing pencils from production to use does not produce any environmental pollutants and has no negative impact on the environment.
The promotion of the film-changing pencil will save a lot of wood, which has a positive significance for the protection of forest resources and the environment. In addition, the manufacture of wood pencils eliminates the need for paints and adhesives, and has a certain effect on environmental protection.
V. Research on the substitute wood products of colored pencils
Since the pencil core of the pencil family that has colored pencils is not suitable for this technology, it is not suitable for the clamping of the movable pencil. The company has also developed another kind of rotary core, reliable performance and easy to use. Color core pencil.
Sixth, market forecast
The function and use cost of the product are superior to other pencils. The manufacturing and use process is environmentally friendly. The product fully meets the design requirements, the mold has been finalized, and the pen material has been selected. As long as the quality of the product is ensured during the production process, and the promotion is promoted. In fact, this product is only a matter of time as an alternative to wood pencils and moving pencils.
Seven, my company's production capacity analysis
1. Our company has 12,000 square meters of standard production plants, 6 horizontal injection molding machines, 7 vertical injection molding machines, 2 computer spring machines, and a number of general-purpose equipment for manufacturing molds. 'The technical strength and production capacity of the mold, at present, the film-changing pencil technology has been basically mature. After the product has been identified, through the self-made and part of the foreign investment, the amount of mold can be increased. It can have 50 million pieces per year in two months. Production capacity of film core-changing pencils and core-changing colored pencils.
2. The self-designed and manufactured grinding lead-core machine with a cost of less than 3,000 yuan is 50% higher than Taiwan's nearly 100,000 yuan machine output. It is very easy to expand the replacement lead production scale.
3. Since the establishment of our company, we have a good operating condition and have the ability to continuously expand and regenerate. Over the years, we have been looking for a product with social significance. The membrane-changing pencil we developed has been highly valued by the leaders of the China Pen Association and the pen-making experts. It has received strong support from the county party committee and the government. We are more confident that we will invest our accumulated funds in equipment acquisition, mold making and marketing, and expand the production scale to 200 million units/year.
4. When necessary, our company will raise funds to expand production scale through loans, etc., and expand production scale to 500 million pieces/year in a short period of time.
5. At present, the Chinese government attaches great importance to the protection of intellectual property rights. The technology of applying membrane core-changing cores is a patent-applying technology. Our company has less risk of expanding production scale according to market demand.
Eight, 212 art process, main components and main technical parameters of the product
(1) Process plan:
Long column pencil lead, one bullet, pencil lead, one test, one, one, one, one, one, one, one, one, one, one, one, one, one, one, one, one, one, one, one, one, one, one, one, one, one, one, one, one, one, one, one, one, one One into the warehouse, one spare part, one assembly, one inspection, one finished product, one package, one inspection, one box
(II) Technical parameters and structural characteristics of main components
1, the bullet pencil lead
a. Shape: a combination of a cylinder and a cone.
b, film: the natural material of the film material, without any side effects.
c, film thickness: 0.01-0.03mm
d, film firmness requirements: does not affect the original writing concentration of the pencil, hands wear white gloves, pencil core placed in the palm of one hand, the other hand pinch the pencil lead 20 times into another container, each One pinch is taken, and the hands are not blackened.
2, core tube
a. The inner hole is smooth and has no depression.
b. The rear end of the small groove has a hole, and the hole diameter is equal to the hole diameter of the core tube.
c. The rear end of the large groove has a mound-like protrusion.
d. The chuck has strong elastic restoring force, ensuring that each pencil core is pushed down by the spring tongue when the core is changed, and can naturally fall off.
3, spring
a, the spring is selected from 0.5TTA steel wire through heat treatment
b, the spring tongue is centered, and the center line of the spring is 45'
c, spring tongue end rounding
(III) Main technical parameters of the product
1. The replacement core of the film-replacement pencil meets the requirements of QB/T2774-2006 pencil.
2. The quality of the film-changing pencil should meet the requirements of Table 1.
No. 1 2 3 4 5 6 7 8
Project retraction force N Locking force N Leading core length mm Leading core performance Durability Performance Secondary impact resistance Storage core appearance Appearance technical requirements ≥9.8 ≥0.3 5±1 Continuous effective ≥5000 The lead core is normal, The parts are free from cracking and deformation. Complete parts 2. Mark handwriting can recognize 3. Smooth surface 4. The whole pen and accessories have no obvious skew and seam
Replacing the surface of the core with anti-fouling properties should reach the contactless black
Nine, quality control
Quality is the basis for the survival of enterprises, and it is the premise and guarantee for products to enter the market and expand the market. Since the establishment of the company, the company has strictly checked the quality of its products. It has developed 2B pencils for self-developed and production test cards. It has been used for most of the provinces and cities for the college entrance examination for 15 years. It has never had quality problems. For the newly developed film-changing pencils, the quality is also strictly controlled from structural design, mold design and manufacturing to product assembly to prevent all quality accidents. First of all, in strict accordance with the "product design, development management procedures" to control the design and development of products to prevent all design quality accidents. Second, strictly implement national and enterprise standards, and combine self-inspection, mutual inspection, and inspection to ensure that product quality control is implemented on each part. Third, the internal quality management of the company implements traceability identification of products, and traces the responsible persons regardless of the quality problems of the products when and where they occur, and improves the consciousness of employees to maintain product quality. Fourth, through the establishment of product quality management, the QC team aims to establish quality management points for various processes and various aspects of product quality from product design to product delivery. Fifth, continuously deepen the people-oriented concept among employees, and take responsibility for consumers, actively carry out quality knowledge training, and improve the quality awareness of all employees of the company.
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