Dec 15, 2020

The role of high-frequency preheater in the production of melamine products cannot be underestimated. After being heated by a high-frequency preheater, it has lots of advantages: enhance the fluidity of the melamine powder shorten the casting time eliminate product water lines improve the finish of the finished product save the amount of melamine powder extend the life of the mold So how to operate the preheating machine? First, let’s get to know the control panel of the preheater. Control panel introduction: A1=CURRENT METER                                    PL1=PILOT LIGHT OF POWER (GREEN) PB2=HIGH FREQUENCY START                      S2=HIGH VOLTAGE SWITCH PL2=H.F.PILOT LIGHT (RED)                         PB1=HIGH FREQUENCY STOP T1=HIGH FREQUENCY TIMER                      NB1=NON-FUSE BREAKER S1=HIGH VOLTAGE ADJUSTER Next, Shunhao will take you through the specific operation steps. 1. Open the preheater electromechanical gate, and the power supply is 380V. 2. Turn on the power switch of the preheater, the power indicator is on, and warm up for 5-10 minutes. 3. Set the high frequency switch to "ON". 4. Set "heating time" and "heating temperature". 5. Put the melamine powder in a special container and press the "High Frequency Start" button. The heating indicator will light up, and the processed object will begin to preheat. 6. When the temperature reaches the set value, the high frequency will stop working and the preheater will automatically open. 7. In normal work, if an abnormality is found, it should be shut down and stopped immediately, and reported to relevant personnel for handling. TIPS：For safety: Please do switch off the power of the machine, during checking or maintenance when needed. And keep the side door closed during its running.

Nov 13, 2020

The most important part of preheater machine is the tube. Before shipment, the tube and the machine will be carefully packed separately. For goods safety, Shunhao machines use wooden box sealed packaging, 100% protection of the machine from moisture and collision. After customers received the machine, our professional engineer worker will help to install the tube back. Let’s look at the video first to get a general idea. Installation Steps: 1. Take out the glass and place the Canon tube back carefully. 2. Connect other wires or coils with their right place tightly. Key note: Toshiba Japan Tube has been changed the name on the 1st.Nov.2018, now the new name is Canon Tube. This is the heart key part of the preheater machine. Preheater machine is mostly used for melamine moulding compound preheating process. Machine Parameters: No Content. HGY-520 HGY-720 HGY-1020 1 Output 5KW 7KW 10KW 2 Power Source 3Φ220V 380V 415V 3Φ220V 380V 415V 3Φ220V 380V 415V 3 Power Input 11KVA 13KVA 20KVA 4 Oscillation Frequency 62MHZ 62MHZ 27MHZ 5 Vacuum Tube 7T699RB E3069RB 8T85RB 6 Voltage Switching 3-stage 3-stage 3-stage 7 Time 999.9S 8 Preheating Power 110℃ Within 60 secs 9 Phenolic Resin 1200gr 1500gr 6500gr 10 Melamine Moulding Compound 1000gr 1200gr 6000gr 11 Urea Moulding Compound 1000gr 1500gr 6000gr 12 Electrode Size 310×360m/m 340×380m/m 450×560m/m 13 Electrode Spacing 30-70m/m 30-70m/m 35-60m/m 14 Machine Dimensions (L W H) 850×600×1520 850×600×1520 1150×820×1720 15 Machine Weight 260kgs 320kgs 600kgs Preheater machine has different models: 3KW is very small, few using in the melamine industry 5KW is using normally, to work with 150 tons-250 tons machine, powder capacity upto 1000grams 7KW is similar to 5KW model, but its capacity is bigger, powder capacity upto 1200grams. 10KW is used for big pressure of melamine molding machine, from 300tons -800tons, powder capacity upto 6000 grams For urea toilet seat cover molding machine,10 KW preheating machine is recommended

Oct 29, 2020

High-frequency preheating machine is mainly used for the preheating of thermosetting materials such as melamine, urea plastic, epoxy resin, phenolic, melamine, etc. before molding. Advantage of Preheating: It can enhance the fluidity of materials, reduce harmful ingredients, and improve the surface gloss of products. Application: kitchenware, tableware, electronic components, integrated circuits, electrical appliances, and other industries. Shunhao Factory has many years of experience in the production of high-frequency preheating machines. During the production process, we continue to improve the machine performance which greatly enhances the self-protection ability of the machine in the use process, and makes the operation and maintenance more convenient and safe for operators! 1. Overcurrent Protection When the machine is in use, if the current is too large due to overload or sparking, the over-current protection device of the machine will automatically cut off the high-voltage power supply and open the upper cover to protect the oscillating tube from the impact of high current. Extend the service life of the oscillating tube! 2. Fan Protection Due to the large dust in the working environment of the high-frequency preheater, the blower that cools the electron tube is susceptible to dust accumulation, resulting in too small cooling air volume! When there is too much dust on the blower turbine or dust filter and the cooling air volume of the oscillating tube is not enough, the special fan protection device will automatically cut off the power of the whole machine to protect the oscillating tube, and the dust must be cleaned to work normally! 3. Dust Filter: Easy to Disassemble and Install The dust filter of Shunhao preheating machine is easy to be disassembled and installed easily without any tools which make the dust cleaning work easier and more convenient! 4. Special Filtering Device Some customers have feedback that when some high-frequency preheating machines are preheating materials, the high-frequency will interfere with the normal operation of the thermostat of the hydraulic machine, causing the temperature of the mold to be very different from the set temperature. Shunhao high frequency preheat machine is specially equipped with a filter device to make the thermostat of the hydraulic press machine works more stably without interference. 5. Security Protection When designing the machine, we have fully considered the personal safety of the operators. The safety performance of this machine is excellent. Operators never need to worry about the upper cover of the machine crushing their hands during operation. After starting the machine, when the upper cover touches obstacles, the protection device of this machine will automatically start, let the upper cover automatically rise to the original position, then the worker will be 100% safe! 6. Two-color Time can be switched at will This machine can provide a variety of preheating time settings. ...

Oct 23, 2020

Normally speaking, under normal operating conditions, the transformer of the melamine tableware press machine is not easy to burn out. Today, SHUNHAO Factory is sharing the following working experience to help the factory engineers to better repair the transformer of the melamine tableware machine. If the transformer of the hydraulic melamine machine does not work properly, please check the status of the transformer according to the following steps: 1. Check whether the three connection points on the upper left side of the transformer are correctly connected according to the correct instructions. For example, 380V voltage needs to connect 1 and 2 415V voltage needs to connect 0 and 2 2.If the connection point is correct but the machine still cannot run, check whether the input point of the transformer has a voltage of 380V or 415V (Figure 1). If there is no voltage output, it means that there is a problem with the Main power, please come to check the main power of your factory. Figure 1 3.If the transformer has a voltage input of 380V or 415V, then check whether the output point of the transformer has a voltage of 220V (Figure 2). If there is a 380V or 415V voltage input but no 220V output, it means that the transformer has been burned out and a new transformer needs to be replaced. Figure 2 4. If there is 220V output, continue to check whether the fuse connected to the output point is blown (Figure 3). If the fuse has blown, replace it with a new one. If the fuse is not blown, it means that this transformer is working normally, please proceed to troubleshoot other problems with the machine. Figure3 SHUNHAO Machinery Factory not only provides melamine crockery machines of qualified quality and updated technology but also has many years of mechanical service experience, which can provide you with the follow-up maintenance guarantee of the machine.

Oct 22, 2020

Today Shunhao is going to share with you the operation rules to ensure the safe operation of hydraulic press machine by factory operators. Safe Operating Procedures 1. The operator should be familiar with the performance and structure of the hydraulic press, and be certified for operation after training. 2. During the operation of the machine, the operator’s body is not allowed to enter the working space of the movable beam, and use tools to load and unload the working parts. 3. The operator must wear personal protective equipment before starting the machine. 4. Perform a pre-work inspection and check whether the various functions of the hydraulic press machine are normal. If there is a problem, it should be dealt with immediately before starting work: Check whether there is oil leakage in various oil pipes, manifold oil valves, oil cylinders, etc.; Check whether the movable beam is obviously sliding down and whether the staying position is correct; Check whether the photoelectric switch and emergency stop switch work flexibly; Check whether there is noise from the hydraulic press; Check whether the oil tank shows enough hydraulic oil; Check whether the piston of the oil cylinder is loose and whether the surface is lubricated with oil. 5. If two or more people are required to cooperate to operate, the front and rear operation switches must be turned on and the corresponding two-hand operation switches and emergency stop switches must be provided. 6. It is strictly forbidden to work beyond the maximum stroke of the movable beam(that is, not less than the minimum closed height of the hydraulic press). 7. When working with full load, the maximum allowable eccentricity of the concentrated load is 50MM, and it must not be overloaded or used beyond the maximum eccentricity. 8. Stop the automatic hydraulic press machine when inspecting the mold and use wooden blocks to support the movable beam. 9. All pressure regulating valves and travel switches must be adjusted with special tools and personnel. 10. The cooling system must be turned on before starting to ensure that the oil temperature does not exceed 60 degrees. 11. During work, pay close attention to whether the hydraulic machine is abnormal. Make sure the machine doesn’t work when it’s abnormal. 12. The melamine mold should be closed before stopping the machine, then stop the oil pump and turn off the power. 13. After finishing the work, clean the machine tool, clean the working area, and fill in the "Equipment Daily Maintenance Card"

Jul 21, 2020

Making molds from China, there are advantages till now: 1. Technology of manufacturing molds is acceptable, and even quite accurate or precise. To know there are many big tableware factories running in China and supplying to European countries or American countries. Do they make molds from Germany or other countries? No, in China only. 2. You know well, the molds from German or Japan or China Taiwan are very good quality, but also the cost is high, can not cover the competition at all. Molds making from China, still can make the profit for tableware factories and also improve their competition, due to its less cost than others. Now share the idea of how to choose the molds steel materials for melamine tableware or urea tableware: The steels normally using for compression molds in China: 718# steel / P20# steel / P45# steel and NAK80# steel (imported steel) To make the Urea tableware: urea tableware is cheap price, the factories need to save the cost from the powder / the molds, even the machines also run the manual model (In China, urea tableware factories only run the automatic molding machines). So, P20# (made-in-China) is popular using in urea tableware production. But the disadvantage is that: such molds making from P20# can not be very glossy. And steel quality is not 100% perfect, sometimes small holes coming from the steel factories, which maybe come out after some days or some months only for such steel problem. Shunhao molds factory workers change such molds steel and make new for clients when such holes coming out in molds factory. To check from the cost, urea tableware molds can choose P20# steel. To make the Melamine tableware: Melamine powder is harder than Urea molding compound, which requires the hard steel for molds. 718# steel is the most popular running in the melamine tableware factories. Cost of 718# steel China is lower than Germany P20# (made-in-Germany, P20# Germany need to pay for its high duty), but its hardness can bear the compression of the melamine molding compound. Tableware making from 718# steel molds is glossy and bright. Even 718# steel is a higher cost than P20# steel (China), but good for melamine tableware and improves its quality competition. P45# steel is using differently: A.Molds' 2 plates B.the testing items for tableware factory C.the ordered goods in a short time or one-time order only Shunhao molds factory has been served for more than 100 tableware factories till now, in and out of China, and still continues on the way to work with them. Shunhao molds factory designs new items to them, find the problem for them, or improve the production for them. Welcome anyone from melamine tableware factories to discuss with me (+86 15905996312), thank you!

Jul 13, 2020

The beautiful appearance of melamine tableware benefits from the application of decal paper. First, the decal paper will be dipped in glazing powder water and dried. After the first press, decal paper and glazing powder will be put on for the second press. Finally patterned melamine tableware finished. The decal paper used in melamine tableware must be dried twice: 1st drying: dry the ink on the paper after printing the pattern 2nd drying: dry the decal paper in the drying oven after brushed with glazing powder water. (It can be dried naturally, you can use the old oven, or you can use the automatic decal paper drying line. 1. If the factory has enough space and the temperature is high enough, we can do natural drying. The decal paper brushed with melamine glazing powder water will be clipped and then hang on the rope. However, natural drying takes up a lot of space, and has to prevent dust from getting on the wet decal paper, which takes a long time; 2. If the demand for decal paper in the factory is not large and the space is not large enough, we can use an old oven with two doors. It is convenient for workers to control the temperature of drying paper. 3. If the demand for decal paper is large, we can use the automatic drying line. It saves labor and time with high efficiency. In addition to the quality of paper and drying quality, the decal paper used in melamine tableware also has operational requirements for use on the molding machine. Technical guide tips: 1. To make good quality decals, it must be put in as soon as possible before bubbles appear on the surface of the product. If the mold is opened too early, the product is easy to stick to the upper mold; If the mold is opened too late, the decal and product has poor adhesion and is prone to defects. 2. The reason for the decal cracks on the product is that the mold closing speed is too fast or the surface of the tableware already had cracks. If you have any questions for the above tips, please check other related articles on Shunhao Machines and Moulds website, or call us +86 15905996312

Jul 07, 2020

The production of qualified melamine tableware requires not only high-quality raw material, qualified melamine crockery making machines, but also some technical support for production operation. More easily for the experienced production manager to get the high-quality melamine tableware. Shunhao factory provides professional guidance for tableware manufacturers by analyzing the causes of defective melamine products. Air Bubbles: short curing time, insufficient exhaust, overheated mold, uneven heating, insufficient pressure, high raw material preheat temperature（machine needed: melamine preheater）; Surface Cracks: insufficient pressure, poor fluidity of raw material, too slow mold closing, raw material dispersion, insufficient raw material; Holes Inside: insufficient exhaust, too fast mold closing, short curing time; Small Wrinkles: too fast mold closing under high pressure, high humidity of raw material; Stick to Mold: insufficient curing, low mold temperature, and unsmooth mold surface; Soft: curing time is too short and high humidity of raw material; Stain: high volatile content in raw material, too fast mold closing, insufficient exhaust, too high mold temperature; Splits: curing time is too long, high mold temperature; Discoloration: uneven heating, high molding temperature, poor raw material quality, short curing time.