High frequency welding and shearing machines for sea and garden items
Items intended for the seaside, swimming pool, camping and outdoor spaces must resist frequent use, traction, folding, humidity and temperature variations. To produce reliable components it is therefore essential to create precise, uniform joints suitable for the materials used.
The high frequency welding and blanking machines allow you to process numerous thermoplastic materials used in the production of inflatable items, beach accessories, garden furniture, tents, umbrellas, mosquito nets and flexible PVC structures.
Bizeta designs and manufactures high frequency machines for sea and garden items with fixed work surface, mobile surfaces or configurations developed according to the dimensions of the product, the materials used and the production volumes required.
How high frequency welding works
High frequency welding, also known as HF welding or radio frequency welding, uses an electromagnetic field to heat compatible materials directly in the area to be joined.
During the production cycle, the edges of the material are positioned on the work surface and compressed through a mold. The high-frequency energy generates the heating necessary for the controlled fusion of the surfaces, while the pressure helps to form a uniform joint.
The result depends on the correct combination of different parameters:
- composition of the material;
- thickness of the edges to be joined;
- effective welding area;
- power delivered;
- applied pressure;
- welding time;
- cooling time;
- shape and dimensions of the mould.
The configuration must therefore be defined starting from the finished product and not just from the external dimensions of the machine.
Which marine items can be welded at high frequency
HF machines can be used for the production of numerous items intended for the sea, beach, swimming pool and recreational activities.
The most common applications include:
- life jackets;
- armrests and inflatable devices;
- beach mattresses;
- inflatable loungers;
- water games;
- inflatable boats and components for inflatable boats;
- waterproof cushions and seats;
- water-resistant bags and containers;
- pool accessories;
- inflatable containment barriers.
Each application requires a specific evaluation of the necessary seal, the geometry of the product and the stresses that the joint will have to withstand.
Welding of life jackets and inflatable items
In inflatable items, the quality of the welding is essential because the joints must help retain air and maintain the shape of the product during use.
The processing must be continuous and uniform, especially in the presence of:
- tight curves;
- angles and changes of direction;
- valves or accessories applied;
- multiple overlapping layers;
- localized reinforcements;
- complex three-dimensional shapes.
HF technology allows you to work following the profile defined by the mold and maintain good repeatability during mass production.
For inflatable products it is still necessary to carry out preventive tests on the material and check the tightness of the finished componentrelation to the intended use.
HF machines for inflatable dinghies and nautical components
Inflatable dinghies and nautical items may include tubes, reinforcements, bottoms, handles, bands and accessories that must be applied precisely.
High frequency machines can be used to create joints and applications on compatible materials, carefully evaluating:
- dimensions of the component;
- thickness and number of layers;
- welding extension;
- placement of reinforcements;
- accessibility of the different areas;
- need to work very long elements;
- handling of the material during the cycle.
For large-format components it may be useful to adopt a machine with a wide table or a configuration that facilitates the progressive movement of the semi-finished product.
Welding of sunbeds, deckchairs and garden furniture
Cloths intended for beach loungers, deckchairs, garden chairs and stools must be carefully finished to withstand repeated use and maintain a tidy appearance.
High frequency welding can be used for:
- create borders;
- form pockets for inserting the tubulars;
- apply reinforcements;
- join overlapping edges;
- create buttonholes or shaped areas;
- apply decorative elements;
- create logos or writing in relief.
The precision of the mold is particularly important when the canvas must adapt to a rigid structure or when the pockets must respect defined dimensions.
Tents, umbrellas and outdoor covers
Tents, umbrellas and outdoor covers can be made with flexible and coated materials that require continuous and well-defined joints.
HF machines can be used to create:
- perimeter hems;
- overlaps between sheets;
- reinforcements in the most stressed points;
- pockets for rods or support structures;
- transparent applications;
- inserts and windows;
- shaped profiles;
- elements customized with branding and decorations.
The size of the work surface must be defined considering not only the area to be welded, but also the space necessary to move the remaining part of the sheet.
High frequency machines for mosquito nets
Mosquito nets can include nets, edges, reinforcements, flexible profiles and transparent components that must be assembled regularly.
HF welding can be used when the materials are compatible with radio frequency and when the product requires a stable union without resorting exclusively to seams or adhesives.
The possible processes include:
- applying borders;
- reinforcement of the perimeter areas;
- pocket formation;
- insertion of transparent windows;
- union of different panels;
- creation of openings and shaped profiles.
Advertising banners and PVC sheets
Advertising banners and PVC sheets can have large dimensions and must be finished precisely to be able to be installed, tensioned or fixed to the structures.
High frequency welding machines can be used for:
- join several portions of cloth;
- create hems and perimeter reinforcements;
- create pockets for tubes or rods;
- apply bands ofreinforcement;
- insert transparent windows;
- create shaped elements;
- finish sheets intended for internal or external display.
When the material has a print, it is necessary to pay particular attention to the positioning, to avoid misalignments between the graphics and the welding profile.
Inflatable containment barriers
Inflatable containment barriers are flexible structures used in contexts where it is necessary to create boundaries or temporarily contain liquids and materials.
Production may require extensive welding, reinforcements, application of valves and joining of multiple panels.
For this type of product the following must be evaluated:
- material and thickness of the sheet;
- expected internal pressure;
- length of the joints;
- presence of accessories;
- number of layers in the reinforced areas;
- overall dimensions of the barrier;
- how to move the component on the plane.
The final resistance must be verified on the complete product through checks consistent with its intended use.
What materials can be processed
High frequency welding is suitable for materials that react appropriately to the electromagnetic field.
Materials commonly associated with these applications include:
- Flexible PVC;
- compatible thermoplastic films and sheets;
- PVC coated fabrics;
- some types of polyurethane;
- coupled synthetic materials;
- coated technical canvases;
- transparent materials for windows and inserts.
Not all apparently similar materials can be welded in the same way. The composition, additives, surface treatments and thickness can modify the behavior during the process.
For this reason it is advisable to carry out tests on real samples before defining the machine, mold and production parameters.
HF welder or blank welder: which one to choose
The choice depends on the operations that must be performed on the product.
A high frequency welder is indicated when the process mainly requires:
- union of the edges;
- application of reinforcements;
- creation of borders;
- pocket formation;
- insertion of transparent elements;
- embossing of logos and decorations.
An HF welding/cutting machine can perform welding and cutting in the same cycle when the geometry of the component and the materials allow it.
Integrating the two operations can contribute to:
- reduce production steps;
- maintain alignment between weld and contour;
- limit the movement of the semi-finished product;
- reduce processing times;
- simplify the organization of production;
- contain waste generated by non-precise trimming.
HF machines with fixed work surface
Machines with fixed table are suitable for processes that require an easily accessible area and manual management of the material.
This configuration can be evaluated when:
- the products have significant dimensions;
- production includes numerous formats;
- the material must be spread out and positioned manually;
- large molds are required;
- the loading time is compatible with the cycleproductive;
- the remaining part of the sheet must remain outside the pressing area.
The surface must be sized considering the component, the mold and the space necessary for the operator to correctly position the material.
Machines with moving floors
Machines with movable floors allow the product to be prepared outside the welding area and subsequently transferred under the press.
This solution can help you:
- the positioning of materials;
- the load of bulky components;
- the alignment of multiple layers;
- the organization of the operator's work;
- the preparation of a product while the previous one is being processed;
- the reduction of unproductive times.
The choice between fixed table and mobile tables must be made by evaluating the production rate, the dimensions of the components and the complexity of the load.
The importance of the mold
The mold determines the profile of the welding and any blanking. Its design directly affects the quality and repeatability of the product.
To develop the mold correctly it is necessary to consider:
- junction geometry;
- width of the weld seam;
- thickness of materials;
- number of overlapping layers;
- presence of curves and corners;
- position of valves and accessories;
- need to cut the outline;
- any logos or motifs in relief.
A properly designed mold helps distribute pressure and energy evenly over the affected surface.
Precision and repeatability in production
In mass production it is necessary to obtain results that are as uniform as possible between one article and the next.
The controlled management of parameters helps to keep the process stable and reduce differences between batches.
The parameters to check include:
- HF power;
- pressure;
- welding time;
- cooling time;
- position of the material;
- table or press stroke;
- mold conditions.
Storing processing recipes can facilitate format changes and recalling the settings associated with the different products.
Protection of the material and the mould
During welding, anomalous conditions may occur caused by impurities, folds, variations in thickness or incorrect positioning.
Spark protection systems can help limit the damage that an unwanted discharge could cause to the material or mold.
Electronic protection does not however replace the correct preparation of the product. It is important to keep the surface and the mold clean, check the arrangement of the layers and avoid foreign bodies in the welding area.
How to choose the most suitable machine
The machine must be selected considering the entire production process.
Before defining the configuration it is necessary to analyze:
- material: composition, coating and compatibility with HF welding;
- thickness: number and consistency of the layers to be joined;
- product dimensions: influence surface and handling;
- welding area: affects the power required;
- type of operation: welding, relief, application orshearing;
- production volumes: determine the pace and level of automation;
- number of formats: influences mold changes and recipe management;
- loading method: must be compatible with the shape and weight of the product;
- Available space: must include work and handling areas.
An accurate preliminary analysis allows you to avoid both undersizing and the purchase of a more complex machine than necessary.
New machines and overhauled used HF machines
Bizeta offers new machines and used solutions subjected to technical inspection.
A new machine allows you to define the configuration based on the product, integrating work surface, power, pressure and accessories consistent with the application.
A refurbished used machine can represent a valid alternative when the available features are compatible with the required process.
Before purchasing it is advisable to check:
- generator power;
- useful dimensions of the top;
- available pressure;
- compatibility with molds;
- configuration of security systems;
- possibility of integrating accessories;
- conditions of the mechanical and electrical parts;
- adequacy with respect to expected volumes.
Why choose Bizeta
Bizeta develops high frequency welding and blanking machines for different industrial applications, including processes dedicated to beach, garden and leisure items.
Depending on the project, Bizeta solutions can offer:
- machines with fixed or mobile table;
- configurations suitable for products of different sizes;
- welding, relief and blanking processes;
- controlled management of parameters;
- possibility of storing recipes;
- process protection systems;
- integration of accessories;
- new or used machines overhauled;
- technical assistance and maintenance;
- analysis of the application before defining the machine.
A solution developed on the product
Life jackets, sunbeds, deckchairs, tents, umbrellas, mosquito nets, banners and inflatable barriers have very different needs.
To identify the correct machine it is useful to provide:
- samples of materials;
- a finished product or prototype;
- overall dimensions;
- measurements of the area to be welded;
- photographs or technical drawings;
- indicative quantities to produce;
- number of formats;
- type of processing required;
- any accessories to be applied.
Contact Bizeta to submit your project. The analysis of the material, the component and the production cycle allows us to identify the most suitable configuration between high frequency welding and blanking machines.
Frequently asked questions about HF machines for sea and garden items
1) Which marine items can be produced with an HF welder?
High frequency machines can be used for life jackets, mattresses, inflatable games, loungers, inflatable boats, swimming pool accessories and other products made from compatible thermoplastic materials.
2) Is it possible to weld inflatable items?
Yes. HF technology is particularly suitable for making joints on various inflatable products. However, the final seal must be checked on the complete component in relationto the pressure and intended use.
3) Can HF machines be used for inflatable boats?
Yes, they can be used for some components, reinforcements and joints of inflatable dinghies and nautical structures. Feasibility depends on the material, thickness and size of the area to be worked.
4) Can the fabrics of sunbeds and deckchairs be welded?
Yes. HF welding can be used for edges, pockets, reinforcements, inserts and shaped elements of fabrics intended for beach loungers, deckchairs and other outdoor furniture.
5) Is it possible to work with tents and umbrellas?
Yes, when the materials are compatible with radio frequency. It is possible to create hems, overlaps, pockets, reinforcements and applications.
6) Can high frequency welders process mosquito nets?
Yes, in the presence of compatible materials. They can be used to apply edges, reinforcements, transparent windows and other product elements.
7) Can advertising banners be made in PVC?
Yes. HF machines can join portions of fabric, create hems, pockets and reinforcements on banners and PVC advertising supports.
8) Which materials can be welded at high frequency?
Commonly used materials include flexible PVC, PVC-coated fabrics and some types of PU and synthetic materials. Compatibility must always be verified through specific tests.
9) Can all waterproof sheets be welded with HF technology?
No. Water resistance does not guarantee compatibility with radio frequency. It is necessary to know the composition of the coating and test the material.
10) What is the difference between a welding machine and a welding machine?
The welding machine joins the materials along the profile defined by the mold. The blank welder can also integrate contour cutting in the same cycle, when the product and materials allow it.
11) Is it possible to weld and cut in the same cycle?
Yes, using a blanking machine and a mold designed for both operations. Feasibility must be verified on the actual product.
12) When is it best to choose a machine with a fixed bed?
The fixed table can be suitable for large products, diversified production or applications that require a large, easily accessible area.
13) What are the mobile floors for?
The mobile floors allow the product to be prepared outside the pressing area and subsequently transferred under the mould, facilitating loading and organization of the cycle.
14) Is a different mold needed for each item?
Generally yes. The mold is designed based on the shape, dimensions, welding profile and any blanking required.
15) Is it possible to apply logos or decorations in relief?
Yes. With a dedicated mold it is possible to create logos, writings, motifs and decorations on the surface of compatible materials.
16) How is the power of the machine defined?
Power depends on the effective welding area, material, thickness, mold geometry and required cycle time.
17) Is it possible to process large items?
Yes. For sheets, covers, banners and large format inflatable structures it is possible to evaluate large work surfaces and configurations that facilitate the handling of the material.
18) What is the anti-spark system used for?
The anti-sparking system helps detect abnormal conditions and limit the damage that a discharge could cause to the mold or material.
19) Bizeta also offers used HF machines?
Yes. Bizeta also has machinesused overhauled. Availability and compatibility with the specific application must be verified directly with the company.
20) What information is needed to request a quote?
It is advisable to provide samples of the material, product dimensions, welding area, quantity to produce, number of formats and type of processing. Photographs and technical drawings make the evaluation more precise.
21) Is it possible to carry out tests on materials?
The possibility of carrying out tests must be agreed with Bizeta depending on the material, product and necessary equipment. Sending samples allows you to better evaluate feasibility.
