SJP Ultrasonics

SJP Ultrasonic has been serving the Healthcare / Cosmetics / Food and Beverages Dairy / Pharmaceutical / Bio-Pharmaceutical / Biotechnology industry with advanced ultrasonic process equipment, one of the most trusted Ultrasonic powder sifter solution provider with quality and reliable integrated projects.

In search of bigger challenges and responsiblities towards the industry, the company has forayed into broader spectrum of providing solutions by slowly and steadily acquiring know-how and technologies in related industries. Continuous market research and feedbacks from valuable end users, SJP Ultrasonics ventured into more challenging avenues of Design / Engineering / Manufacturing and Installations.

Plastic Welding

Plastics welding is the process of joining two pieces of Thermoplastics at heated state and under a pressure as a result of cross-linking of their polymermolecules. The work pieces are fused together with or without filler material. The joint forms when the parts are cooled below the Glass Transition Temperature (foramorphous polymers) or below the melting temperature(for crystalline polymers).

Thermosets (thermosetting resines) in cured condition cannot be welded, since cross-linking oftheir molecules has completed.

Plastics welding processes:

Ultrasonic Welding

Technology

Ultrasonic Welding is a plastics welding process, in which two work pieces are bonded as aresult of a pressure exerted to the welded parts combined with application of high frequency acoustic vibration (ultrasonic).

Ultrasonic vibration transmitted by a metal tool (horn, sonotrode) causes oscillating flexing of the material and friction between the parts, which results in a closer contact between the two surfaces with simultaneous local heating of the contact area. The plastic melts in the contact area, the polymer molecules are cross-linked, forming a strong joint.

Ultrasonic Welding cycle takes about 1 sec. The frequency of acoustic vibrations is in the range20 to 70 kHz (commonly 20-40 kHz). The ampltude of the acoustic vibrations is about 0.002" (0.05 mm).
Thickness of the welded parts is limited by the power of the ultrasonic generator

Ultrasonic Welding is used mainly for processing amorphous polymers (Polysterene(PS), Acrylonitrile-Butadiene-Styrene (ABS))

  • Medical equipment (filters, face mask, valves, cardiometry reservoir)
  • Automotive components (glove boxes doors, filters, valves, airflow sensors)
  • Appliance (vacuum cleaner, steam iron, dishwasher components)
  • Electrical equipment (switches, terminal blocks,connectors)
  • Electronic and computer components
  • Toys
  • Short welding cycle
  • Easily automated and controllable
  • Small amount of flash forms
  • Low energy consumption
  • Only small and thin parts may be welded
  • Tool design is required

Vibration Welding

Technology

Vibration Welding is plastics welding process, in which two work pieces are vibrated at certain frequency and ampltude. The parts rubb each other under a pressure causing a friction between their surfaces, which generates heat. The heat results in melting polymer in the joint region. The work pieces are fused together and after a predetermined time the vibration stops. The polymer molecules are cross-linked when the work pieces cool down, forming a strong joint.

Vibration Welding cycle is very short (milliseconds). The frequency of acoustic vibrations is in the range 100 to 500 Hz (commonly 100-240 Hz). The ampltude of the vibrations is about 0.02-0.2” (0.5-5 mm).

Most polymers (amorphous, semicrystalline and crystalline) produced various fabricationmethods (Thermoforming, Extrusion, Injection molding, Blow molding,Compression molding, Transfer molding) may be welded by Vibration Welding.

Vibration Welding is used in automotive and domestic appliance industries.

  • Oxidizing polymers may be welded
  • Easily automated
  • High productivity
  • Large and complex parts may be welded
  • Relatively expensive equipment
  • Minimum rigidity required

Hot Plate Welding

Technology

Hot Plate Welding is a plastics welding process, utilizing heat of hot plate placed between the surfaces to be joined. The work pieces, pressed to the plate, heat up and soften. After a predetermined time the plate is removed, the parts are brought to the contact, pressed and fused together. Their polymer molecules are cross-linked when the work pieces cool down, forming a strong joint.

Hot plates are made mainly of Aluminum alloys. A hot plate is equipped with an electric heating elements and a thermocouple providing temperature control of the plate surface.

  • Components of domestic electric devices (dishwashers, washing mashines, vacuum cleaners)
  • Pipes
  • Automotive components (lights, fuel tanks, reservoirs, batteries)
  • Easily automated
  • High quality tight joints
  • Large and comples parts may be welded
  • Hot plate provides conforming the joined surfaces
  • Long welding cycle: up to 20 sec. for small parts and up to 30 min. for large parts
  • Relatively large amount of flash (excess material) forms

Spin Welding

Technology

Spin Welding is a plastics welding process, in which two cylindrical parts are brought in contactby a friction pressure when one of them rotates. Friction between the parts results in heating their ends. After a predetermined time the rotation stops and the molten regions of the work pieces are fused together under an axial pressure applied until the joint is cooled down.

Spin Welding is similar to Friction Welding (FRW).

Spin Welding is used for manufacturing aerosol bottles, floats and other circular parts.

  • Disdvantages of Spin Welding
  • High quality weld
  • High quality weld
  • Oxidizing polymers may be welded
  • At least one of the parts to be welded should have a circular symmetry
  • Minimum rigidity required

Heat

Stacking

Heat staking also known as thermoplastic staking is the process of joining two dissimilar materials together . In heat staking we use local heating and cooling to raise the temperature of plastic components and allow plastic reforming to be carried out. This reforming can be used in a wide variety of applications.

The plastic is deformed by heating it to a temperature above the glass transition temperature. Super-heated air or a thermode is used for this. Pressure is then applied to create the stake. After the stake has been formed, the plastic should be cooled down again below the glass transition temperature. Cooling is performed under constant pressure to ensure good fixation of the parts. Compressed air can be applied for cooling when a thermode is used.

Heat is used to facilitate the creation of the stake. Heat control is critical, especially for glass-filled plastics which often have a process window of less than 10 degrees Celsius. When the temperature is too high, the glass fibers come out of the plastic which leads to a rough surface and adhesion to the thermode. If the temperature is too low, the plastic will crack due to cold deformation.

  • Similar and dissimilar materials may be joined: metal to metal, plastic to plastic, metal to plastic
  • Accurate control operating within a small process window
  • Local heating resulting in no damage to surrounding materials
  • Local heating resulting in no damage to surrounding materials
  • No mechanical vibration
  • Many heat-stake shapes possible through custom designed tools

IR Welding

Technology

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Whom We Serve ?

Brand having experience of more than 25 years
Automotive
Electronics
FMCG
Medical
Chennai
No: 1B , Sri Venketeswara Nagar , Kisikitha Main Road , West Tamabaram, Chennai - 600045
Gurgaon
Plot No. 13 -C Phase - 5 , Udyog Vihar , Gurgaon , Haryana - 122001.
Pune
Plot No 1 Gat Number :357/18, Near Ambika Vajan Kata, Kharabwadi , Ambethan Road , Chakan , Tal Khed,
Pune-410501 Maharashtra
Mumbai
Unit 1 & 2, Bldg. No. 5, Shiv Shankar Industrial Complex II, Bhutpada, Opp. Golden Chariot hotel, Vasai highway, District Palghar - 401208. Maharashtra, India.
  • Investments in securities market are subject to market risk, read all the related documents carefully before investing.
  • SJP ULTRASONICS Ltd,
    Unit No 1 & 2 , Shiv Shankar Ind Complex II, Bldg No 5 , Opp Golden Chariot Hotel,
    Bhutpada , Vasai Highway, Dist- Palghar, Maharashtra, India Pin-401208.
    Corporate Identification Number: (CIN):U29253MH2012PLC226489
    Website: http://sjpultrasonics.com.
  • Company Secretary & Compliance Officer- Mr. Jamshed Kokab Khan
  • In case of any grievances please write to investor: cs@sjpultrasonics.in
    Compliance Officer: Mr. Jamshed Kokab Khan
    Tel::+91 77700 10869 Email: cs@sjpultrasonics.in
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