The following types of plumbing products are engineering:
1. Various pipes, parts from them and assemblies (metal, plastic, asbestos-cement);
2. Water folding and shutoff valves (taps, mixers, valves, joysticks, siphons).
Recently, the most popular parts from polymer parts. It affects their cost, low weight, ease of installation. The production of such parts is simpler and cheaper than metal elements, and can be the beginning to open a business for the production of all kinds of engineering plumbing.
Technology
Plastic parts are made in several ways:
- extrusion blow molding - used for the manufacture of PVC pipes. The material is poured into the melting hopper, then the extruder extrudes the pipes of the specified parameters.
- injection molding. A special machine (injection molding machine) is used for it. The raw material is melted and then injected into bilateral forms. After solidification and cooling, the part is removed. In this way, small and auxiliary parts are manufactured (parts of drain valves of flushing cisterns, housings and covers of flushing cisterns, casings and parts of float valves, caps of water taps and mixers, shower nets, casings, nuts, manifolds, couplings, etc.).
- molding from sheets. Produced using hydraulic or mechanical presses and pneumatic molding machines. Thermoplastic sheets are heated and molded. So they make bathtubs, shower trays, washbasins.
To start, choose the organization of production:
- operating room. In this case, the worker makes parts on the machines separately for operations (cutting and bending pipes, threading, welding, etc.).
- in-line operational. On each machine there is a worker to perform a certain operation.
- aggregate. A production line is being built for each type of product. Serves the line from one to two workers.
- conveyor belt. Operations have a clear automated order, the conveyor moves at a certain speed. Workers are fixed at certain points and operations. Every two hours, workers are stopped to rest.
The first two methods are used for small production, the latter for larger.
Cast parts and pipes are subjected to further processing, for example, produce units for plumbing. Plastic pipes are cut to a given size. Billets with uneven cut surfaces are trimmed. Bent pipe bends are made using a pipe bender, pre-heating the workpiece in a glycerin bath. Next, parts of the nodes are assembled, glued, or welded. If required, units and pipes are tested for strength and density.
Equipment and raw materials
The technological line for the production of parts, pipes and components for plumbing from polymers is as follows:
1. PVC pipe production line
- extruder
- pipe cutting machine;
- feed system;
- baths for calibration and cooling;
- mixer;
- pulling device;
- shipping tape;
- vacuum moulder;
- pipe stacker.
Productivity depends on the size of the pipe: pipe diameter - 20.25, - 80 kg / h, pipe diameter - 32.40.50 - 100 kg / h, pipe diameter - 63.75.900.10 - 130 kg / h. The cost of a used line is from 400 thousand rubles.
2. Auxiliary parts production line:
- injection molding machine - the cost is from 150 thousand rubles for a used one, from 1 to 2 million rubles for a new one.
- molds for the product (about 100 thousand rubles for one model);
- a mixer for PVC (270-500 thousand rubles);
- refrigeration unit (50 to 250 thousand rubles);
3. Equipment for processing pipes and parts:
- milling machine (from 100 thousand to 1 million rubles);
- pipe bending machine (hydraulic - 20-200 thousand, manual - 10-20 thousand rubles.)
- saw for cutting pipes (20-100 thousand rubles);
- butt welding machines (60-150 thousand rubles);
- drilling machine (manual - from 4 thousand rubles, automatic - from 100 thousand rubles)
Metal accessories may also be needed.
The price of low-pressure polyethylene (HDPE) is about 32 rubles per kilogram and above. Polypropylene - 30-75 rubles per kilogram.
To place equipment, warehouses, utility rooms, you need a building with an area of 2 thousand square meters. m. For service and process control 20-30 people will be enough.
Investment and sale
The total costs of equipment, rental of premises, purchase of 100 tons of raw materials, salary and other expenses will amount to about 6 million rubles. The return on business is 2-3 years.
The construction of new buildings and the repair of old sewer systems provide a constant demand for plumbing products. The largest customers are construction companies.
Cherukhina Kristina
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