Hot Topping
Hot topping are added to the tops of risers and pouring cups to help improve the efficiency of the riser. Hot toppings are either exothermic, insulating, or a combination of both. Hot toppings generate heat to help aid in the feeding of the casting. Once the exothermic reaction has finished, the crust formed causes an insulating effect preventing heat loss, improving piping, and effectively feeding the casting.
We offer a range of exothermic, insulating, and metal-producing powder hot topping. In addition, we provide hot toppings for ferrous and non-ferrous alloys. With various times for ignition, rate of burn, and amount of smoke generated, we have an option that will work for you.
Carpenter Brothers, Inc. has all the necessary products for your casting and shakeout operation. We have metal cleaners, slag coagulants, metal skimmers, and vacuum-formed skimmers to help ensure your castings are defect-free. In addition, we carry a wide range of pouring hand ladles and sampling spoons for ferrous or nonferrous applications. And after you have poured your casting, we have the right hot topping to apply. So take a look around; if you don’t see what you are looking for, give us a call or send us an email as there is a good chance we have it.
| Name | Time for Ignition | Rate of Burn (mm:ss) | Smoke | Odor | Crust or Expanding | Density | Exothermic, Insulating, or Metal Producing | Ferrous or Non-Ferrous |
|---|---|---|---|---|---|---|---|---|
| Exotop 500 | 4-5 sec | 01:25 | MED | LOW | Crust-Hard | 70-80 Density | Exothermic | Ferrous |
| Expandex 500 | 3-4 sec | 01:50 | MED | LOW | Expanding-Soft | 60-70 Density | Exothermic | Ferrous |
| Expandex 544 | 3-4 sec | 01:15 | LOW | LOW | Expanding-Medium | 57-59 Density | Exothermic | Ferrous |
| Exotop 300S | 6-7 sec | 01:35 | LOW | MED | Crust-Hard | 60-70 Density | Exothermic | Ferrous |
| Exotop GLS | 3-4 sec | 00:40 | MED | LOW | Expanding-Soft | 55-65 Density | Exothermic | Ferrous |
| Exotop NF | 1-2 sec | 00:30 | MED | LOW | Crust-Hard | 85-90 Density | Exothermic | Nonferrous |
| Insultop 100 | 0-2 sec | 00:45 | NONE | NONE | No Change-Soft | 32-36 Density | Insulating | Both |
Foundry Products
We supply the necessary foundry products you need to make a quality casting. Whether you need Metals & Alloys, Melting & Melt Quality, Molding & Core Making, Casting & Shakeout, Finishing & Surface Preparation, or Environmental Compliance products, we have what you need.
About Us
Carpenter Brothers, Inc. is the leading supplier of equipment, consumables, and technical expertise for the metal casting industry. Founded in 1917, by Everett and Milton Carpenter, the brothers were able to use their unique foundry experiences to solve the problem of the day: a reliable sand source. They got their foot in the door by selling natural bonded molding sand, which was mined by hand, loaded into horse-drawn carts, and then delivered to customers. Not only did they sell the sand, but their technical expertise was readily available for all customers, big or small, to help manufacture the best castings. After surviving The Great Depression, Carpenter Brothers, Inc. slowly increased the number of products it distributed and expanded its sales territory into what it is today.
Carpenter Brothers, Inc. has committed itself to its customer's success by providing exceptional service to go along with the superior products and equipment they supply. With multiple warehouses around the United States we can get you the products you need when you need them. Our logistics team can handle getting your order to you by truck, plane, or train. Our technical sales and engineering staff all have experience in the industry, so when you buy from Carpenter Brothers you gain access to all of our knowledge.
