HT-HI has heavily invested in the industries’ most advanced production equipment and has developed innovative production techniques, all of which add up to HT-HI products being the highest quality and most cost effective castings available on the market today! Our vertical, flaskless and automatic injection molding line is currently the world’s most advanced vertical molding line.
It is suitable for producing castings in various shapes and sizes. Our products feature: high precision, high density and low porosity. At HT-HI we are extremely conscious of the environment and our production processes are all engineered to have the lowest possible impact on the environment. Our horizontal molding line is advanced to the industry because of our high-pressure, two-step, airflow-assisted pre-compaction and hydraulic squeezing technology. This ensures the sand molds are uniform and compact, which provides optimum conditions for making quality castings. Lost foam casting is a type of evaporative-pattern casting (abbreviated as EPC). We use this technique to remove the need for any die joint or sand core. This allows us to produce castings with extremely smooth surfaces and without burrs or trimming. Our cold box production line features short cycle times and high productivity, thanks to rapid hardening. Sand molds with smooth surfaces are utilized for enhanced product quality. The Italian FATA lost foam production line is used to produce precision castings in complicated shapes. It features a high degree of automation, for great labor cost savings and even greater product precision.
We have nearly a thousand specifications of casting cavities. This enables us to use different facilities to produce castings in a timely and accurate manner. It is our firm pledge to never use any recycled material in the iron melting process. We strictly control the molten iron in production, in order to guarantee the timing and accuracy of the test. Our melting workshop incorporates an independent lab which has been established solely for the purpose of spectrum analysis. Two advanced vacuum direct-reading spectrometers are employed for the real-time testing of molten iron. This can ensure the molten iron is properly controlled before casting. We conduct these tests and regular inspections to ensure customers receive only top quality products, free from defect.
The molten iron is protected with superior thermal insulation material, which guarantees a constant-temperature casting process. With the use of a special filter and patented technology, we can remove slag from the molten iron. The company owns a multitude of gas-fired fully automatic tunnel kilns and large annealing furnaces. These facilities accomplish the heat treatment of various castings comply with the temperature control curve. The entire structure or surface property of the material is changed, which allows us to obtain high-quality products.
In our completely independent quality control department, we utilize a full range of product testing machines, which accomplish the comprehensive analysis and detection of product quality and eliminate any products which are not up to par. Primary testing equipment includes: the direct-reading spectrometer, metallographic microscope, nondestructive flaw detector, automatic hardness tester, physical property testing equipment, foundry sand testing equipment, and many others. The fully-automatic polishing equipment is great for removing rust and also ensures a smooth finish. We utilize a diverse range of precision production equipment to meet the customers’ requirements for further processing of our products. The constant-temperature automatic spray painting line ensures that the coating of our product has a desired thickness and a high level of smoothness. HT-HI inventories tens of thousands of diverse equipment pieces, in order to fulfill customers’ requirements for quick delivery of metal casting supplies.
Cold molding workshop
The box type molding machine uses a solid mold to compress the molding sand into the required shape.
Sand molds are being cleaned by two operators. This ensures the shape of the casting is consistent and complete.
Production has been completed on this batch of sand molds.
Our sand molds, as seen in this picture, have numerous advantages, including high density, good porosity, excellent thermoplasticity, uniform and smooth surface, and no deformation.
The Italian FATA lost foam production line is used to produce high-precision plastic molds.
This workshop is equipped with lost-foam plastic molding equipment. Polyurethane particles are injected using hot-press molding method. Our equipment features a high level of automation. The plastic lost foam that has been pressed is perfectly matched with a female die.
This warehouse inventories an ample supply of lost foam molds, which can fulfill various customers’ equipment casting requirements. There is no need to open the mold for temporary use. The production cycle is short. We have the ability to produce large-diameter hollow grinding balls.
Lost-foam molds of the spare parts of concrete pump trucks
Plastic lost-foam molds of various types of mixing arms
Over ten thousand molds are available in the warehouse. They can meet the customers’ needs for production and delivery of various products.
Demonstrated here is our vertical, flaskless and automatic injection molding line. Our molds are regularly shaped during service life cycles. Those molds that fail to be shaped are bound to be abandoned.
Pictured here is the high-pressure horizontal molding process. The horizontal box is composed of upper and lower units, in which the molding sand is compacted by high pressure. This production line possesses a high level of automation. Sand molds are shaped precisely, enabling us to produce high-precision castings.
The molding sand that has been evenly stirred by our automatic sand mixer is being put inside the horizontal mold.
The molding sand is automatically vibrated and mixed by this equipment.
The horizontal box is conveyed automatically and awaits casting.
Seen here is the automatic sand mixing equipment. Before being poured into a female die, the molding sand is mixed automatically and uniformly.
Large-sized automatic sand mixer
The vertical, flaskless and automatic injection molding line is an unmanned, technologically advanced process in which the molding sand is hydraulically pressed and formed according to the shape of the female die. Castings are featured by high density and low porosity. They are perfectly matched with our quality molds.
Vertical sand molds can be shaped upon request.
This equipment is automatically pushed to work with the use of hydraulic pressure.
The molten iron is vertically cast and then put into molds through a constant-temperature furnace. This can ensure no temperature variation during the batch casting process, which results in a high pass rate of this batch of products.
The uniquely designed, patented filter of the constant-temperature furnace can eliminate impurities and ensure the purity of the castings.
The automatic lost foam molding line features a high degree of automation, which means no operator is required in this advanced production line. Typical applications are found in the production of large and medium sized castings. The lost foam mold has high density and is a perfect fit for the female die.
The automatic mold rollover equipment is used immediately after the lost foam mold has been completed.
In this workshop, our melting furnaces work at different frequencies, which can fulfill various customers’ product hardenability requirements. These furnaces are all friendly to environment.
Pictured here is a ladle of qualified molten iron. Sampling inspection is conducted before the molten iron is transferred to a furnace. We perform the real-time testing of the furnace temperature.
Samples are ready for inspection before being delivered to the furnace. We carry out a timely inspection to make sure the components are qualified.
Different batches of samples before being put into the furnace
The BAIRD direct-reading spectrometer comes from the United Kingdom. It performs stably and can offer high-precision analysis result. In addition, this instrument has the function of uploading data automatically. It can accomplish elemental analysis within 50 seconds before the samples are transferred to our furnace.
The Thermo FisHer direct-reading spectrometer is imported from the United States. To ensure the real-time testing of samples in continuous production, it is commonly used in combination with the BAIRD spectrometer. These two spectrometers perform accurately and stably. They are placed in an independent lab, 50 meters away from the melting furnace. This can ensure the timely testing and delivery of all samples.
The electronic metallographic microscope can observe the internal microstructure of our castings. It can accomplish qualitative and quantitative analysis of metallographic graph.
Detailed comparison of metallographic graphs
The fully automatic heat treatment line comes with gas-fired tunnel kilns. It is PLC-controlled and complies with the temperature control curve. Its drive system runs stably and reliably. All these features allow us to meet customers’ needs for heat treatment of various products.
Castings are driven into the furnace automatically.
Castings are being discharged out of the furnace.
Automatic quenching is conducted after the castings leave out of the furnace. We use a variety of quenching techniques to process different workpieces, which can fulfill your casting stress relieving requirements.
The quench bath performs multi-step soaking process in strict compliance with the quench curve.
The gas-fired tunnel kiln is used for hardening, tempering and normalizing of various metal castings. It is driven by natural gas and can control temperature stably. It offers a sufficient capacity that can meet your requirements for normalizing of large workpieces.
The castings that have undergone heat treatment are required to be transferred to the surface treatment workshop. Here we perform shot blasting and polishing process which can ensure the surface of the casting is smooth and flat.
This equipment can accomplish shot blasting on castings in a fully automated mode, which can ensure our workpiece has a smooth surface and a nice exterior.
Our diverse range of machine tools can be found in this workshop, which can satisfy our customers’ requirements for precise machining of products.
We have invested in a semi-automatic spray painting line which can guarantee the smoothness and thickness of the paint coatings, and thus, we can make all clients satisfied with the appearance of our products.
We have tens of thousands of diverse products stored in our warehouse to satisfy our customer's needs.
Wear-resistant castings are stored here and await delivery.
Our diverse range of concrete mixing plant spares