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Base on injection process, we focus on plastic ABS molds & plastic Polypropelene molds more than 15 years. CATALOG OF CONCRETE MOLDS: Commercial concrete planter molds, Roman column molds, Breeze block molds, Baluster molds, DIY walk maker forms and other Garden decor molds etc.
Silicone molds for concrete have always been in a very high position among DIY enthusiasts. Inexpensive, easy to make, are its main advantages. Such as: Small planter molds, Candle molds, Soap molds, Skull molds etc.
Normally, The latex molds only for custom service, because it is the most cost-effective manufacturing process for customizing a small order of molds. Of course, silicone molds can also do this, The choice of latex or silicone ultimately depends on the customization needs of customers. The most common is to use in the production of concrete / plaster sculptures.
In the true sense, the size of industrial-grade concrete molds is very large, which has a great test for the durability of mold materials. Therefore, steel and fiberglass are the best choices. The disadvantage is that they can only be applied to engineering projects with relatively simple shapes. Such as utility poles, sewer wells, prefabrication of culverts, etc. At present, LCMOLDS accepted customized services only.
Prefabricated raw materials (concrete, silica gel, plaster, etc.), molds, release agent(for Plastic Molds only),gloves, goggles, scales, mixing tools, support, operating instructions, etc.
These will be better to help you complete the project.
1. Calculate the weight of water needed to fill the mold.
For example: A planter mold weighs 1000 grams, and the total weight when filled with water is 2000 grams. Therefore, the weight of water needed is 2000 grams (total weight) – 1000 grams (mold weight) = 1000 grams (water weight).
2. Calculate the weight of cement required.
The density ratio of water to concrete is 1:1.88. Therefore, the amount of cement needed is: 1000g x 1.88 = 1880g
3. Calculate the weight of water needed for mixing the concrete.
Cement weight x 25% = 1880 x 25% = 470g
Therefore, the amount of cement needed to cast this concrete planter pot is 1880g, and the amount of water needed is 470g.
Usually we often talk that the mold release agent is mainly used in plastic(ABS, PP) molds. Before pouring, it should be applied on the inner wall of the mold first. The advantage is that it is convenient to demould after the prefabrication is completed.
Molds made of other materials, such as silicone molds, are not suitable.
Concrete needs to be mixed, so you must control the ratio of various raw materials. During the pouring process, the construction should be done slowly and at a constant speed. When necessary, a vibrating table or a vibrating rod is required to remove the air bubbles in the concrete. After completion, wait for the concrete to solidify and form, depending on the temperature or environment, ordinary concrete takes 24-48 hours.Â
If you are using a special type of quick-setting cement, please refer to its specific demolding time specifications (for example, some types can be demolded after 4 hours).
For the demoulding of large-sized concrete blocks, you can use a rubber hammer to lightly hit all angles of the mold, and the finished product will fall off naturally-provided that the mold release agent has been applied to the inner wall of the mould.
After the finished concrete is demoulded, its strength is not fully hardened, so it must be placed in a ventilated place to dry naturally (it takes about 12-24 hours). Note: Prohibit sun exposure and rain.
If have more perfect DIY molds or know how to easy concrete precasting or molding release, please give us more of your ideas, maybe, you love to help more families.
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