What are the forms for gypsum and how to work with them?

What are the forms for gypsum and how to work with them?

Gypsum is known as the material obedient, grateful, in treating. Those who work with him know this magic of turning the mixture into something beautiful, and most importantly, man-made. And form for plaster of different types and variations increases the creative possibilities of a master working with this material.

What are the forms for gypsum and how to work with them?

general description

Gypsum – Available material sold in any constructionarket is inexpensive, and therefore, even if something does not work with him, it will not hit the wallet much. But that and such misses did not happen, you need to imbued with the technology of working with plaster and find out what helps to turn the powder into elegant decorative products. This is primarily forms for gypsum fill.

These forms make from a wide variety of materials – from the tree to cement. Multi-stage casting process. It is the casting in the forms lasts a few minutes, but on the preparatory procedures and the following after the low tide and forces goes far. First you need to make a model of the product, then design and make a form, further prepare materials for casting and lubrication form. It is important that the counting account is literally for a minute, and when the process has already begun, everything should be at hand, any delay is fraught with failure.

Opel (shape) in front of the casting is lubricated, the solution is mixed and poured into the form of a very thin jet, allowing the opportunity to exit. After the bay, the form should be brought, a little shake, so the solution will reach small relief parts. Then the product will be dried by how much way. After that, the form disassembles, and if it cannot move away from the product, it can be asked for a rubber hammer. Nitgle is removed, and the item is being finalized.

If the form is used again, it needs to be cleaned.

What are the forms for gypsum and how to work with them?

What are the forms for gypsum and how to work with them?

What are the forms for gypsum and how to work with them?

Review of species

Species of forms a lot, and each in its own way attractive. For example, the adhesive option is made of gelatin (alternative can be carbon black). First make glue: 7 kg gelatin is poured by half-liters of warm water, this composition is withstanding half an hour, waiting for his swelling. A piece of joinery glue should be broken down into small pieces with a hammer, then soak in water 24 hours, from time to time changing water. After the day, 1.5 liters of hot water is added, and the composition is brewed in a water bath. In this case, the melting closes tightly, at the very end of the process, 300-350 ml of water and shelter of special glycerol are added.

What are the forms for gypsum and how to work with them?

What are the forms for gypsum and how to work with them?

What are the forms for gypsum and how to work with them?

What else are forms?

  • Silicone. The container is made of hard material, for example, chipboard or fiberglass. The slots in the container are excluded, all parts of the shell are connected to the glue. Further, it will take plasticine for sculptures, to evenly put up to half of the container. Plasticine surface should be smooth. And here the model is pressed into the plasticine, holes are made around with a pencil, so that the parts of the form did not shift. Then the volume of material is measured – something is poured into the container, and then it is sent to the measuring container. And the surface of the model will need to be lubricated by the separation composition.
  • Plastic (formoplast). The advantage of such forms is that the rigidity of the matrix is ​​combined with the subtlety of the walls, they also repeat the outlines of fragments. These forms are not capricious in care, do not fear the effects of chemical reagents. Plastic molds for casting are made on the technology of hot casting and presses, it is done on professional equipment. At home, it is almost impossible.
  • Rubber. They are made by hot polymerization, strictly under pressure. These forms are made automated, that is, professional equipment will be required. These forms demonstrate high abrasive stability, they are durable and able to convey the texture of natural stone is actually perfect.
  • Polyurethane. These forming forms are distinguished by elasticity, wear resistance, they also do not require any special care, demonstrate alkalis resistance. To obtain a polyurethane form, mix modified polymer and hardener. Polyurethane is considered the most popular form of forms, which is suitable for casting not only from plaster, but also from concrete, cement.

With the help of such forms, you can make garden figures, kashpo, crafts, decorative tiles and t. D.

What are the forms for gypsum and how to work with them?

What are the forms for gypsum and how to work with them?

What are the forms for gypsum and how to work with them?

How to make it yourself?

Under the conditions of the home workshop, it is quite possible to cope with the design of the form.

What are the forms for gypsum and how to work with them?

What are the forms for gypsum and how to work with them?

Tools and materials

And preparatory process, and the casting procedure itself are conjugate with large dust formation. Therefore, in the room where the casting is carried out, ventilation must be adjusted, and then – cleaning space. And if there are allergies in the house, you have to search for another place to work. It is still worth remembering that a mixture of dust and air, if it comes to a certain concentration, is explosive. Because the outdoor fire in this room is the most hard ban.

The main equipment for casting and performs the form, but precedes its production model model. Here, clay or plasticine comes to revenue, in a word, any material with similar characteristics.

And if you have to make a copy of the product, then the model will serve as the original.

What are the forms for gypsum and how to work with them?

What are the forms for gypsum and how to work with them?

What else needs to be taken:

  • The container in which water and gypsum will be mixed;
  • Glass with a nose to pour the plaster itself;
  • rubber bands to throw parts of the form;
  • brushes under lubrication;
  • drill to drill holes;
  • knives and spatulas;
  • Scotch and Cardboard.

If a little run forward, it is worth telling about the plaster. It must be a quality composition, compromises are excluded. Is that if and take a construction alabaster, then only necessarily sinking through a sieve of 0.2 mm. Alabaster should be, so to speak, Pukhov, without foreign impurities.

Lubrication for the form is not a problem to buy, but at home, too, everything is done quickly and cheap: rubbing baby soap on the grater, add water and vegetable oil. For work on obtaining a form, you need a flat table, or a flat floor, as well as smooth plywood or chipboard. On the bottom of this plywood attach the side of 5 cm, and this will form a box under the fill.

What are the forms for gypsum and how to work with them?

What are the forms for gypsum and how to work with them?

What are the forms for gypsum and how to work with them?

Technology

It consists of several stages. First – Matrix Making. Without a matrix, it is impossible to achieve the liquid material correctly.

What are the forms for gypsum and how to work with them?

Production features are.

  1. Formation of large relief. In order for the texture to be large, you need a stone. On the one hand, it should be flat, and on the other – relief. Mergel is suitable, and granite. You can make a relief surface from sandstone, natural stone, but not only of them. In constructionarkets today you can buy special samples. And here the selected stone is trying on the board and stacked in such a way that a centimeter remains to the plywood wall. And between these fragments in the layout should remain a centimeter clearance. Stones need to circle a pencil. Universal glue is applied to the flat part, Silicone is also suitable. Those places that remain between the irregularities and the surface fills the acrylic sealant. Remnants of it will have to remove carefully.
  2. Formation of small relief. First have to make a box equal to the size of one element with sides of 2 cm. Small invoice is convenient to create from sandstone or buy a ready-made sample, again, in the constructionarket. After conjunction of irregularities to the educated relief, apply special paraffin. It is melted using a construction dryer. Melted paraffin will leak through the gaps, fill the bottom of the small box. When the paraffin freezes, small boxes will take off, the model will remove and fit into a large box. Install the resulting model you need to glue.
  3. The following stages are suitable for the manufacture of silicone, and for polyurethane forms. Bowl boxes need to be fixed on the self-tapping screw. Joints need sealing. Stones, as well as the inside of the box, you need to lubricate with machinery (instead you can take melted vaseline). This will be a dividing composition.
  4. Next, according to the instructions on the package, a mixture of silicone or polyurethane is prepared. It needs to be stirred to homogeneity.
  5. The box will have to fill in the composition. In the case of a polyurethane, the mixture after the fill is heated by a construction hairdryer, then extra air bubbles go from the surface.
  6. Through the time required to froze the composition, the box is dealt. A form remains.

Approximately such instructions make forms for 3D models and other structures to help create beautiful, elegant things.

What are the forms for gypsum and how to work with them?

What are the forms for gypsum and how to work with them?

What are the forms for gypsum and how to work with them?

The next mini instruction will help newcomers to learn how to work with silicone forms.

  1. Silicone sealant itself, a chancelling, a hermetic container under the matrix for future fill, soap or soap water, the original item from which the form will be made.
  2. The original surface should be prepared – clear if there are contaminants, spacked in the case of the surface porosity. It is necessary to make sure in the tightness of the container, which is usually done from something hard, like chipboard or fiberglass.
  3. To make one-sided form, the original should be placed in the container, it should be treated with butter or cream and pour silicone. If the sealant is used many, silicone is applied in layers, between layers withstand fifteen-minute pause. It is especially important that even the top layer.
  4. It should be waited until silicone dries off, and the drying time is always indicated in the instructions for sealant. Then the container disassembles, the billet goes.

That’s all, the silicone form is ready. If it is not one-sided, and the bulk form, then on the bottom of the container is a sculptural plasticine, and the original is placed there halfway. The second half of the original is filled with silicone. Then half with silicone is removed, the plasticine is removed, the silicone layer is put down. On the half, where there was previously plasticine, a layer of cream or oil is applied. The second half of the original is poured by sealant. And after the frozen, the shape is cut by the joint, and the workpiece without any problems is extracted.

What are the forms for gypsum and how to work with them?

What are the forms for gypsum and how to work with them?

What are the forms for gypsum and how to work with them?

How to use it?

It is worth telling more about how to use plastic forms. Newcomers still do not quite understand due to the absence of experience, as plaster grasps, and this process is very fast. When the gypsum expands with a significant heat release, the form, it happens, “clinical”.

So that this does not happen, you need to use a frame.

What are the forms for gypsum and how to work with them?

What are the forms for gypsum and how to work with them?

What are the forms for gypsum and how to work with them?

What else is important:

  • use separator – if the form is not lubricated, the gypsum sticks out;
  • When removing the panel from the form you need to be very attentive – if you redistribute, the panel can stumble tightly;
  • pull out at the time of the start of heating, but it may depend on the type of gypsum;
  • To get the panel to, you need to go through the thin blade around the perimeter between it and the form so that the gap is obtained into which the air penetrates;
  • After the panel got, it must be placed on the final drying, only on a flat surface;
  • Wash the shape after casting is considered to be the NO 1 rule – to start rinse, and after 20 fills and washed thoroughly;
  • Dirty leave the shape for the night can not be, because by the morning everything sticks out so that it will be extremely difficult to pull out, and how to breed – it is not clear;
  • If the form is already adhesive gypsum, only a powerful solution of citric acid, diluted with water in such a ratio, will also be labeled, diluted with water in such a ratio so that the solution is pointed;
  • Forms made of plastic, in which there were no plaster for more than once, it is often impenetted, therefore it is necessary to store them freely, pressing them with nothing heavy.

What are the forms for gypsum and how to work with them?

What are the forms for gypsum and how to work with them?

Casting from plaster allows even at home, in the most modest conditions to create exclusive interior decorations, make a larger decor – sculptures and even statues. Highly cute toys are obtained from plaster. With the help of construction silicone forms from a natural material, a decorative tile is made, actively used in the design of apartments.

What are the forms for gypsum and how to work with them?

What are the forms for gypsum and how to work with them?

What are the forms for gypsum and how to work with them?

How to make molds for plaster, you can learn from the video below.

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