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PPSU Pipe Fitting Mould
Your Leading Huida Mould.Supplier
Huida Mould was established in 1989. We have been devoting to the pipe fitting mould design and manufacture more than 30 years. We have particular experience in producing customized plastic pipe fittings. Including sewerage and drainage system, potable water supply, roof drains, irrigation, and gas supply with material of PVC/CPVC/ PPR/PP/HDPE/ABS/PPSU etc. We have made & exported molds for customers in 67 countries 543 enterprises around the world.
Huida mould has a team of experienced R&D and manufacture. We adhere to the "excellent quality, reasonable price , prompt delivery capacity, and exceptional service" goals for our company to become your ideal partner in mutually beneficial business transaction with our international customers.
Why Choose Us?
High quality
Our products are manufactured or executed to very high standards, using the finest materials and manufacturing processes.
Competitive Price
We offering a higher-quality product or service at an equivalent price. As a result we have a growing and loyal customer base.
Rich experience
Our company has many years of production work experience. The concept of customer-oriented and win-win cooperation makes the company more mature and stronger.
Global shipping
Our products support global shipping and the logistics system is complete, so our customers are all over the world.
After-sale service
Professional and thoughtful after -sales team, let you worry about us after -sales Intimate service, strong after -sales team support.
Advanced equipment
A machine, tool or instrument designed with advanced technology and functionality to perform highly specific tasks with greater precision, efficiency and reliability.
What is PPSU Pipe Fitting Mould?
PPSU press fittings are a type of plumbing fitting that use a press-fit connection system to join pipes. The fittings are made from PPSU material, which is a high-performance plastic that is known for its excellent strength and durability. The PPSU material is also resistant to high temperatures, chemicals, and UV radiation, making it ideal for use in plumbing systems.
Benefits of PPSU Pipe Fitting Mould
The company conducted a competitive advantage analysis to identify its strengths and weaknesses compared to its rivals.
Leak-proof connections
PPSU press fittings create a tight and secure connection between the pipe and fitting, which minimizes the risk of leaks or water damage.
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Quick and easy installation
PPSU press fittings can be installed quickly and easily, which reduces installation time and labor costs.
02
Reduced risk of damage
Because PPSU press fittings do not require welding or soldering, there is less risk of damage to pipes or fittings during installation.
03
Cost-effective
PPSU press fittings are a cost-effective option for plumbing systems, as they require less time and labor to install than traditional welding or soldering methods.
04
High-performance material
PPSU material is known for its high performance, which means that PPSU press fittings are durable and long-lasting.
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1. Elbows: These are used to change the direction of fluid flow. They come in different angles, such as 45 degrees and 90 degrees, to suit the layout of the piping system.
2. Tees: These fittings branch off the main line, allowing for the connection of a third pipe. They are available in equal and reducing variations, depending on the diameter of the branch pipe compared to the main pipe.
3. Crosses: Similar to tees, crosses provide a four-way intersection for piping systems. They are less common than tees due to their more complex installation and space requirements.
4. Couplings/unions: These fittings are used to join two pipes together. They can be either slip couplings, which slide over the ends of the pipes, or threaded unions, which require threads for connection.
5. Reducers: When there is a need to connect pipes of different diameters, reducers are used. They can be concentric (tapering from one end to the other) or eccentric (with an offset to maintain a straight alignment of the centers of the pipes).
6. End caps/closures: These are used to seal the end of a pipe, preventing fluid leakage. They are typically used in systems requiring a closed-end configuration.
7. Flanges: Flanges are used to connect pipes, valves, fittings, and other equipment to a piping system. They provide a flat surface for bolting the components together and are available in various types, including welding neck, slip-on, lap-joint, and socket weld flanges.
8. Nipples: These are short pieces of pipe with male threads on both ends, used to connect other fittings or to adapt between different pipe sizes.
9. Valves: While not strictly pipe fittings, valves are critical components used to regulate or stop the flow of fluid within a piping system. They come in various types, such as ball, gate, globe, check, and butterfly valves.
Application of PPSU Pipe Fitting Mould
PPSU press fittings are used in a variety of plumbing applications, including hot and cold water systems, central heating systems, and air conditioning systems. They are suitable for use in both residential and commercial buildings and can be used in new construction or in retrofitting existing plumbing systems.
PPSU press fittings can be used with a wide range of pipes, including copper, PEX, and multilayer composite pipes. They are available in a range of sizes and configurations to meet the needs of different plumbing systems.
Process of PPSU Pipe Fitting Mould
Design: The first step is to create a detailed design of the part or component to be produced. This involves determining the dimensions, features, and structural requirements of the final product.
Mold preparation: A mold is created, usually made of steel or aluminum, that has a cavity in the shape of the desired part. The mold consists of two halves: the stationary half (the “cavity”) and the moving half (the “core”). The mold is precision machined to ensure accurate replication of the part.
Material preparation: PPSU is supplied in the form of pellets or granules. The material is dried to remove any moisture, as moisture can affect the quality of the final product. The dried PPSU pellets are then loaded into a hopper of the injection molding machine.
Injection molding machine setup: The injection molding machine is set up by adjusting various parameters such as temperature, injection pressure, and injection speed. These settings may vary depending on the specific grade of PPSU being used.
Injection: The PPSU pellets are fed into a heated barrel of the injection molding machine. Inside the barrel, the pellets are melted under high temperature and pressure. Once the material reaches the molten state, it is injected into the mold through a nozzle and sprue system.
Cooling and solidification: After the molten PPSU fills the mold cavity, it begins to cool and solidify. Cooling can be accelerated by circulating coolant or water through channels in the mold. The cooling time is carefully controlled to ensure the proper solidification of the material.
Mold opening and ejection: Once the PPSU has solidified, the mold is opened, and the part is ejected. The moving half of the mold (core) is pushed away from the stationary half (cavity), and the part is released using ejector pins or plates.
Post-processing: Depending on the specific requirements, the molded PPSU part may undergo additional post-processing steps. This may include trimming excess material, surface finishing, and any necessary assembly or quality checks.
How to Maintain PPSU Pipe Fitting Mould
Regular inspection: Check the mold for any signs of wear, damage, or buildup of material on a regular basis. Look for cracks, scratches, or corrosion that could affect the mold's integrity and operation.
Cleaning: After each production run, or at least after each shift, clean the mold to remove any leftover PPSU material, dust, or debris. Use appropriate solvents or cleaning agents that are safe for PPSU and won't damage the mold's surface. Be sure to clean all moving parts, cooling channels, and ejector pins.
Lubrication: Apply a suitable lubricant to all moving parts such as slides, lifters, and ejector pins. Ensure that the lubricant is compatible with PPSU and does not attract contaminants.
Temperature control: Maintain proper temperature settings for both the mold and the injection machine. Temperature inconsistencies can lead to warping, stress, and premature wear of the mold.
Storage: When not in use, store the mold properly to prevent damage from environmental factors like humidity, extreme temperatures, or physical impact. Consider using protective covers or placing the mold in a controlled storage environment.
Alternative Products
While PPSU fittings offer numerous benefits, several alternative materials are commonly used in plumbing and fluid systems:
Brass fittings
Brass has been a traditional choice due to its durability and ease of manufacturing. However, it is prone to corrosion over time and can be heavier than PPSU.
PVC fittings
Polyvinyl chloride (PVC) is widely used for its affordability and corrosion resistance. However, it may not be suitable for high-temperature applications.
PEX fittings
Cross-linked polyethylene (PEX) fittings are popular for their flexibility and ease of installation. However, they may not possess the same high-temperature resistance as PPSU.
Injection Molding Design Guide
Wall thickness
The recommended wall thickness for PPSU injection molded parts ranges from 0.76 to 2.92 mm. To avoid potential part defects, apply a uniform wall thickness. If thicker walls are required in some areas, make the transition gradual. Avoid excessively thick walls because they tend to cause internal voids and sink marks.
Rounded corners and fillets
Use rounded corners and fillets instead of sharp corners to reduce stress concentrations, minimize the risk of cracking, and facilitate material flow during injection molding.
Draft angles
Apply a draft angle, or taper, to the walls of injected molded PPSU parts so that it’s easier to eject them from the mold. Generally, 1° to 2° of draft is sufficient for both the inside and outside walls. Textured finishes increase draft requirements by a minimum of 1 degree per side for every 0.001 inch of the texture depth.
Bosses
Although PPSU has excellent dimensional stability, some part designs include bosses for extra stability and to support the use of fasteners. Make the thickness of a boss less than 60% of the wall thickness. This will help to prevent sink marks from shrinking as the plastic cools.
Ribs
Ribs enhance structural integrity and increase load-bearing capacity. If your design uses these features, incorporate fillets at the bottom of the ribs and apply a radius of 0.25T-0.5T (where T is the nominal wall thickness). To help prevent sink marks, limit rib height to 2.5T.
PPSU Material Processing
Moisture
Prior to injection molding, dry PPSU at a maximum temperature of 165°C for approximately 4 hours. If necessary, PPSU resins can be dried for a longer period but at a lower temperature. Regardless of duration, use a desiccant bed dryer with a dew point maintained below -30 °C.
Temperature control
PPSU requires very high temperatures because this amorphous plastic is difficult to melt. Typically, the temperature of the injection barrel is 360°C. To achieve a similar pressure in the mold, special heaters may be required.
Injection speed
Use a moderate injection speed. For best results, this speed should be fast enough to achieve melt homogeneity but slow enough to avoid shear burning. For unfilled grades, PPSU fill times are typically 2 to 5 seconds. Faster injection rates support more uniform solidification and a good surface finish, especially with glass-reinforced PPSU grades.
Cryogenic Deflashing
PPSU parts can be cryogenically deflashed. Cryogenic deflashing is a process used to remove excess flash or burrs from molded plastic parts. Flash is the thin layer of excess material that can be formed along the edges or parting lines of molded parts.
The cryogenic deflashing process typically involves the following steps:
Preparing the parts
The PPS parts are first inspected to identify any excess flash or burrs that need to be removed. They are then placed in a fixture or container that can withstand the extreme temperatures of the cryogenic process.
Loading into a cryogenic deflashing machine
The parts, along with any media or abrasive agents, are loaded into a cryogenic deflashing machine. This machine is specifically designed to handle the low temperatures and remove the excess flash from the parts.
Cryogenic cooling
The machine is sealed, and liquid nitrogen is introduced into the machine, rapidly cooling the parts and the media to very low temperatures, typically below -50°F.
Tumbling and deflashing
Once the parts and media are cooled, the machine is activated, causing the parts to tumble or rotate inside the chamber. As the parts move, the brittle excess flash or burrs become more fragile and brittle due to the low temperature. The media, along with the cold temperature, helps break away and remove the excess material.
Separation and inspection
After the tumbling process, the parts and media are separated. The parts are inspected to ensure that the excess flash has been adequately removed. If necessary, the process can be repeated for further deflashing.
Post-processing and finishing
Once the cryogenic deflashing process is complete, the parts may undergo additional post-processing steps, such as washing, drying, and any required finishing operations, to achieve the desired surface quality.
Our Factory
Within our company , we realize the importance of the "win-win" nature of doing business between ourselves and our customers. Based on this perspective, we spare no efforts to achieve breakthroughs in technology and production. We are firmly committed to providing our customers with high quality and reasonable cost mould , and with a consistent and reliable supply source .
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