大成プラス List of Products and Services

Thick-walled molding is one of the methods of resin injection molding and is a technology used for applications such as lenses that take advantage of the product's wall thickness. However, in conventional thick-walled molding, there were issues such as shrinkage and voids (bubbles), which required measures like slowing down the injection speed and extending the cooling time, leading to longer molding cycles. As a result, thick-walled molded products tend to be more expensive. Therefore, we propose a thick-walled molding method using two-color molding. *For more details on the column, please refer to the related links. For further inquiries, feel free to contact us.*

• Injection Molding Machine

This time, we would like to propose "laser marking," one of the decorative processes for molded products. Compared to ink printing, laser marking, which offers higher durability, is widely adopted in medical devices that undergo frequent alcohol disinfection. However, laser marking not only enhances the durability of prints but also provides various benefits in improving the design quality of products. Keytops that form letters and symbols using two different colored resins can be expressed through two-color molding, but if we want to add a transparent layer to the surface, three-color molding becomes necessary. *For more detailed information, please refer to the related links. If you have any questions, feel free to contact us.*

• Injection Molding Machine
• Laser marker

Recently, the demand for flame-retardant plastics has been expanding. Their applications span various fields, including automobiles, industrial equipment, and amusement devices. It is generally known that there are flame-retardant grades for rigid plastics, but the existence of flame-retardant grades for elastomers, which are soft plastics, is not widely recognized. Therefore, this time, we would like to introduce flame-retardant grades. *For detailed content of the column, please refer to the related link. For more information, feel free to contact us.*

• plastic

Two-color molded products made of PC (polycarbonate) and ABS can be plated on the ABS side without masking. This technology utilizes the characteristic of PC, which is difficult to plate, allowing plating only on the ABS side. By taking advantage of the features of two-color molded products and applying plating, it enhances decorative and functional properties, making it suitable for automotive parts and decorative components of amusement devices. *For more details, please refer to the related links. Feel free to contact us for more information.

• Plating Equipment
• Injection Molding Machine

Daisei Plus Co., Ltd. can perform two-color molding in a clean room environment. In a clean room that is pressurized by a HEPA filter air supply unit, it is possible to carry out molding, assembly, inspection, and packaging operations, providing an ideal environment for products such as optical components, medical supplies, food, and cosmetics. Workers remove hair, dust, and other contaminants from their clothing using adhesive rollers and air showers to prevent foreign matter contamination. *For more details, please refer to the related links. Feel free to contact us for further information.

• Injection Molding Machine

In recent years, as the demand for two-color molding has increased, we have been receiving more inquiries about three-color molding as a way to add further value. Similar to two-color molding, there may be challenges depending on the combination of resins, but our company also owns a dumbbell test mold for fusion verification. Therefore, we can start by testing the material combinations from prototype development. If you would like to see samples of three-color molding or inquire about the technical details, please feel free to contact us. *For more detailed information on the column, you can view it through the related links. For further inquiries, please do not hesitate to contact us.

• Injection Molding Machine

This time, we would like to propose products made from wood grain-like resin materials. Cellplane is a material composed of 100% resin without the use of wood powder or similar substances. It does not absorb moisture, which can cause corrosion in wood and WPC (wood-plastic composites), so there will be no corrosion over time. It can also be foamed depending on the molding conditions, allowing for weight reduction. Various designs are possible for the appearance as well. *For detailed information about the column, please refer to the related links. For more information, feel free to contact us.

• plastic

Integrating multiple materials through injection molding. This is a development concept that we have valued since the establishment of our company. We have been engaged in manufacturing with various combinations such as "resin + resin" or "resin + metal," but there are cases where integration is not possible depending on the combination of materials. Therefore, our company actively collaborates with various material manufacturers, and when existing materials do not meet the specifications required by our customers, we also work on creating custom materials tailored to those needs. *For more details on the column, please refer to the related links. For further inquiries, please feel free to contact us.

• Other polymer materials

Two-color molding is a unified molding technology that uses an injection molding machine equipped with two injection cylinders and two molds to thermally fuse two types of resin in a single molding cycle. This not only reduces the assembly effort but also enhances the functionality of injection-molded parts. Our company specializes in two-color molding that combines "hard resin + soft elastomer," as well as molding with different color combinations, enabling the creation of molded products that cannot be expressed with just one type of material, as well as value-added products. *For detailed information, please refer to the related links. For more details, feel free to contact us.

• Injection Molding Machine

A machine that melts plastic material with heat, pours it into a mold, and shapes it is called an "injection molding machine." It is also referred to as a plastic injection molding machine, and it is a type of machine tool that can handle the processes of "melting the material → injecting and molding it into the mold → cooling it to solidify → removing it" all in one unit. *For more detailed information, you can view it through the related links. Please feel free to contact us for more details.

• Injection Molding Machine

The two-color molding technology not only has the cost advantage of eliminating the need for parts assembly and adhesive processes, but it also offers benefits such as enhancing user experience and improving the design of electronic products. Taking the example of elevator buttons, when the numbers are printed, there is a problem where the characters wear down and become faded over time. By using a light-transmitting material for the number part and performing two-color molding, it is possible to create buttons that are resistant to wear. *For more details on the column, please refer to the related link. For further inquiries, feel free to contact us.

• Injection Molding Machine

Two-color molding is a method of creating a single molded product by combining two different materials (resins or materials). For example, it is possible to mold a combination of plastic and elastomer (soft material). Since it combines two different materials in one process or cycle, it is also known as "double mold." The molding machine for two-color molding has two nozzles and a cylinder. Materials are injected and filled into the mold in sequence, allowing for the creation of two types of components. Additionally, it typically uses two molds with different concave sides. *For more detailed information, please refer to the related links. If you have any questions, feel free to contact us.*

• Injection Molding Machine

Plastics are widely used in electronic devices and medical components, so the aspect of "flammability" (i.e., flame retardancy) is an important indicator for ensuring safety. In evaluating the flammability of plastics, we look not only at "non-combustibility," which means they do not catch fire at all, but also at characteristics such as "self-extinguishing," where the fire goes out when removed from the heat source, and "slow-burning," where the combustion rate is slow even if ignited. Even silicone rubber, which is generally considered to be flame-resistant, is a material that lacks self-extinguishing properties and continues to burn once ignited. Therefore, to achieve practical levels of flame retardancy, flame retardants are added to slow down the combustion rate or impart self-extinguishing characteristics. *For more detailed information, please refer to the related links. Feel free to contact us for further inquiries.*

• Injection Molding Machine

Injection molding is an excellent manufacturing method that allows for the rapid mass production of products with complex shapes. The process can be broadly divided into three steps: melting, injecting, and solidifying. To perform injection molding, an injection molding machine and a mold are required. The roles involved are melting the molding material, injecting the melted molding material, and opening and closing the mold to solidify the injected material. Thus, the injection molding machine consists of an injection unit that melts and injects the molding material and a clamping unit that attaches and opens and closes the mold. Additionally, it is equipped with mechanisms to drive these two units. *For detailed content of the column, please refer to the related links. For more information, feel free to contact us.*

• Injection Molding Machine

There are two types of molds necessary for the production of plastic products: "mass production molds" (main molds) suitable for mass-produced items, and "simple molds" (temporary molds / prototype molds) suitable for small lots with short delivery times. For mass production, "mass production molds," made of durable steel and capable of consistently producing high-precision products, are appropriate. On the other hand, for prototypes or small lot production, "simple molds" made of aluminum, which help reduce mold costs, are suitable. *For more detailed information, please refer to the related links. Feel free to contact us for further inquiries.*

• Injection Molding Machine

In two-color molding, products are made by combining two types of materials. Depending on the combination of materials, it is possible to add functions and designs that cannot be achieved with conventional injection molding, such as those with different hardness or colors, or completely different materials. Additionally, by eliminating the need for manual assembly, time and costs can be saved, and using no adhesives allows for consideration of the environment. *For more details, you can view the related links. Please feel free to contact us for more information.*

• Injection Molding Machine

Approximately 8 million tons of plastic flow into the ocean as waste each year, and various measures related to plastic, such as seawater-decomposable plastics and recycling, are gaining attention. Additionally, globally, the commitment to the SDGs has become essential as part of corporate philosophy. In terms of addressing environmental issues, there are various perspectives and methods, whether the goal is to reduce the amount of plastic used or to emphasize recycling. *For detailed content of the column, please refer to the related link. For more information, feel free to contact us.*

• Other polymer materials

Among the "injection molding machines" that melt plastic with heat and pour it into molds to shape it, those that can combine and mold two or more materials simultaneously (two-color molding / multi-color molding) are called "multi-color molding machines." In this article, we will introduce five manufacturers of injection molding machines and their representative multi-color molding machines. Please take a moment to read it. *For detailed content of the column, you can view it through the related links. For more information, please feel free to contact us.

• Injection Molding Machine

We would like to introduce "Plating Masking," the core technology of Daisei Plus Co., Ltd. By applying plating to products (base materials) that are molded in two colors using a combination of ABS resin, which allows plating to deposit, and PC resin, which does not, it is possible to achieve a clean plating finish on the intended design areas. Since the plating edge is formed within the mold, conventional complex masking processes are unnecessary, allowing for the creation of beautifully plated decorative items with clean edges. 【Product Example】 ■ Item: Lens cover for vehicles ■ Resin: PC + ABS ■ Product Size: 45mm (height) × 280mm (width) × 80mm (depth) ■ Molding Machine: Two-color molding machine (SE280T) ■ Sales Point: Expression of metallic aesthetics through two-color plating masking *For more details, please refer to the PDF document or feel free to contact us.

• Injection Molding Machine

We would like to introduce our core technology, the "thick lens," developed by Daisei Plus Co., Ltd. Using our unique know-how with two-color molding, we propose thick light guide lenses that reduce the holding pressure cooling time and halve the molding cycle. As a result, improved production efficiency also makes it possible to keep costs down. Please feel free to contact us when you need our services. 【Product Performance Example】 ■ Item: Spherical light guide lens (4 pieces) ■ Resin: PMMA + PMMA (or PC) ■ Product Size: Diameter Φ60mm, Thickness 20mm ■ Molding Machine: Two-color molding machine (SE280T) ■ Selling Point: Increased production efficiency and reduced costs due to halving the molding cycle *For more details, please refer to the PDF document or feel free to contact us.

• Injection Molding Machine

We would like to introduce "Fusion Dumbbells," the core technology of Daisei Plus Co., Ltd. In response to the request, "I want to consider the design concept for two-color molding, but I would like to know the fusion strength of the materials I want to use." Our company has prepared a dumbbell test mold for two-color molding (for fusion confirmation) and provides reports on the fusion strength results of materials. This allows for pre-validation of material fusion strength, enabling progression to the next design step. 【Features】 ■ We provide a dumbbell test mold for two-color molding (for fusion confirmation) and report on the fusion strength results of materials. ■ Pre-validation of material fusion strength allows for progression to the next design step. ■ Experienced staff offer advice during the material selection phase. *For more details, please refer to the PDF document or feel free to contact us.

• Injection Molding Machine

We would like to introduce "3-color molding," which is the core technology of Daisei Plus Co., Ltd. By incorporating the idea of inserting into the primary side of a two-color molded product, we are realizing a three-color molded product that was previously hard to imagine. This allows for designs using various combinations of materials, expanding the possibilities for product development. 【Product Examples】 ■ Materials: ABS + TPEE + PMMA ■ Molding Machine: Two-color molding machine (SE130T) ■ Product Size: 20mm (height) x 33mm (width) x 9mm (depth) ■ Selling Points: Waterproofing and cost reduction through three-color integration *For more details, please refer to the PDF document or feel free to contact us.

• Injection Molding Machine

We would like to introduce our flagship technology at Daisei Plus Co., Ltd., which is "Large Two-Color Molding." Based on our solid track record in two-color molding over many years, we are capable of precise two-color molding for large products. Leveraging our experienced technical expertise, we respond to the market demand for "large two-color molding." 【Product Examples (Partial)】 ■ Product Name: LED Light ■ Resin: PC + PC ■ Product Size: 300mm (Length) x 60mm (Width) x 46mm (Height) *For more details, please refer to the PDF document or feel free to contact us.

• Injection Molding Machine

We would like to introduce "Multi-Functional Integration," the core technology of Daisei Plus Co., Ltd. We have achieved the integration of necessary functions for products (such as waterproof buttons, LED lenses, light-shielding ribs, LCD screens, waterproof gaskets, etc.). By forming multiple functions in a single piece, we can reduce assembly labor and lower costs. 【Product Examples】 ■ Item: Waterproof Remote Control Case ■ Product Size: 95mm (H) × 190mm (W) × 17mm (D) ■ Material: PMMA + TPEE ■ Molding Machine: Two-color molding machine (SE280T) ■ Selling Points: Waterproof and cost reduction through two-color molding multi-functional integration *For more details, please refer to the PDF document or feel free to contact us.

• Injection Molding Machine

We would like to introduce a technology called "two-color molding," which involves injecting two types of materials to create a single product. The injection molding machine has two nozzles and cylinders, injecting in sequence into the primary and secondary molds. A significant feature of this process is that, to combine the two materials, after injection into the primary mold, there is an additional step of rotating, inverting, or sliding 180 degrees before injecting into the secondary mold. Since multifunctional items can be produced in a single process, it is possible to significantly reduce the assembly steps that were previously done manually, thereby increasing productivity. 【Compatible Materials】 ■ Various plastics ■ Thermoplastic elastomers ■ Thermosetting elastomers ■ Polypropylene ■ Polyacetal ■ Polyvinyl chloride *For more details, please refer to the PDF document or feel free to contact us.

• Injection Molding Machine
• Plastic Mould

We would like to introduce our company's injection molding bonding technology for metals and resins, called 'NMT Treatment.' By performing 'NMT Treatment,' we uniformly form very stable dimples of 20 to 50 nm on the metal surface. By embedding resin into these fine dimples through injection molding and crystallizing it, a strong bond can be achieved. The strong bonding of various resins and metals allows for greater freedom in product design. 【Features】 ■ Bonding strength (shear strength) = over 40 MPa ■ The strong bonding of various resins and metals allows for greater freedom in product design ■ After thermal shock testing (-55℃/1H ⇔ 150℃/1H × 3000 cycles), there is no degradation in bonding strength (equivalent to 10-year specification for automotive engine rooms) ■ Aluminum can be used in high-temperature and high-humidity environments (after 8000 hours of testing at 85℃/85% RH, there is no degradation in bonding strength) ■ Formation of nano-order dimples in a short time *For more details, please refer to the PDF document or feel free to contact us.

• others

This document contains the technical data for products handled by Taisei Plus. It includes tests such as shear strength tests, tensile strength tests, and high temperature and high humidity tests. The evaluation methods for shear strength tests, tensile strength tests, and peel strength tests are in accordance with ISO 19095. Please take a moment to read it. 【Contents】 ■ Shear Strength Test ■ Tensile Strength Test ■ Peel Strength Test ■ High Temperature and High Humidity Test ■ Product Performance *For more details, please refer to the PDF document or feel free to contact us.

• others

"NMT (Nano Molding Technology)" is a technology for integrated molding of metal and resin through injection molding. By applying surface treatment to the metal, nano-level dimples are formed on the metal surface. These fine dimples are filled with hard resin through injection molding, thereby integrating metal and resin. Additionally, since processes such as surface treatment are unnecessary, like in magnesium alloy molding technology, it contributes to cost reduction and shorter processing times. During recycling, the risk of ignition is low, allowing for safer operations, which also helps reduce environmental impact. 【Compatible Resins and Metals】 ■ Resins - PPS, PBT, PA6, PA66, PPA ■ Metals - Aluminum, Magnesium, Copper/Brass - Stainless Steel/Titanium/Iron/Aluminum-coated Steel *For more details, please refer to the PDF document or feel free to contact us.

• others

At Daisei Plus Co., Ltd., we offer a strong adhesion technology called 'NAT (Nano Adhesion Technology)' that utilizes epoxy adhesives. Through NAT treatment, fine irregularities are formed on the metal surface, allowing the epoxy adhesive to penetrate into the recesses when applied to the bonding area, resulting in a strong adhesive force. Additionally, the high adhesion strength enables high-strength bonding of dissimilar metals. This technology allows for product development that was not achievable with traditional methods such as welding. 【Features】 ■ Nano-sized surface treatment ■ Bonding of metals using epoxy adhesives ■ Achieves adhesion strength 2 to 3 times greater than traditional methods ■ Applicable to aluminum, magnesium, copper, stainless steel, iron, and titanium *For more details, please request materials or view the PDF data available for download.

• others

At Daisei Plus Co., Ltd., we offer a technology for integrated molding using injection molding of metals and resins called 'NMT (Nano Molding Technology).' By applying surface treatment to metals, we form nano-level dimples on the metal surface. This groundbreaking technology generates a strong bonding force by incorporating rigid resin. It enables the development of new products that achieve weight reduction of metal exterior components such as product housings and bodies. 【Features】 ■ Bonding strength (shear strength) = 40 MPa or more ■ Strong bonding between various resins and metals allows for greater design flexibility ■ No degradation of bonding strength after thermal shock testing ■ Aluminum can be used in high-temperature and high-humidity environments ■ Nano-order dimples are formed in a short time *For more details, please refer to the PDF document or feel free to contact us.

• others