Molding machine

Define the casting equipment used to make the sand mold. Its main functions are: filling sand, filling the loose sand into the sand box; compact sand, compacting the loose sand in the sand box through different methods such as compaction, compaction, shock pressure, and shot pressure. In the process of handling and pouring, etc., it has the necessary strength; from the mold, using different mechanisms to remove the pattern from the compacted sand mold. The molding machine first appeared in the middle of the 19th century. The early molding machine was a simple mechanism for manually compacting the mold, and later compressed air was used as a power for the compaction and compaction of sand. In 1890, a shock-type molding machine emerged, which improved the efficiency of molding and the accuracy of sand molding. The molding machine can be divided into compaction type, compaction type, shock pressure type, injection pressure type molding machine and sand throwing machine according to its compact sand method.

The classified compaction molding machine uses air pressure or hydraulic pressure to press the sand in the sand box through the indenter or pattern to compact the sand. Its pressure is generally 0.25-0.4 MPa. This type of molding machine has a poor compaction of the sand pattern away from the pressure surface. High-pressure molding machines emerged in the early 1950s and the pressure on the sand plane was above 0.7 MPa. The pressure head of the high-pressure molding machine is divided into several types of structural forms such as a flat head, a forming head, and a multi-contact head. Among them, the high pressure multi-contact molding machine is the most widely used. The head of the high-pressure multi-contact molding machine is divided into many small cubes that can move up and down—contacts. Large hydraulic forces can be obtained through hydraulic cylinders. Pressing in real time, each contact according to the following pattern height (ie pressure sand thickness) to apply the corresponding pressure, so that the sand mold to obtain a high, uniform tightness and hardness. This type of molding machine is equipped with micro-shock shock mechanism, able to adapt to the complex shape modeling. High-pressure multi-contact molding machine uses four-column structure, single station type and double station type. In order to adapt to the production of small and medium-sized batch castings, this molding machine is accompanied by a template quick-change device. When the template is replaced, the molding machine does not have to stop. Using high-pressure multi-contact molding, sand casting can cast out thin-walled, precise-sized, smooth-surfaced castings.

Shock-type molding machine This type of molding machine can be divided into two kinds of shock-type and micro-shock-type molding machine. The sand box and pattern are fixed on the workbench of the molding machine, and the sand type is compacted by the collision of the workbench with the impact surface of the anvil and the inertia of the sand. The noise of this molding machine is serious, and the compactness of the upper part of the sand mold is very low, and it has been replaced by a micro shock compaction molding machine. The shock pressure molding machine compacts the actual sand mold to obtain a compact sand pattern in the upper and lower parts. Commonly used micro-shock compaction molding machine (see figure), use the falling of the work platform to collide with the floating iron, microseismic compact sand, and then compaction. Microseismic vibrations are replaced by high-frequency (500 to 1000 beats/minute), small-amplitude (5 to 25 millimeter) vibrations in place of the low-frequency (60 to 120 beats/minute), large-amplitude vibration of the impact molding machine. The sand mold made by this molding machine is of good quality and has lower requirements for the foundation.

The molding machine is a pressure molding machine. It uses compressed air to evenly inject molding sand into the sand box and compact it before applying pressure. Commonly used are vertical type boxless injection molding machine and horizontal type box injection molding machine. Vertical type boxless injection molding machine modeling without sand box, sand directly into the modeling room with a template, the sand made of high dimensional accuracy, due to the sand box on both sides of the cavity, the productivity is high, but the core is difficult , strict quality requirements for sand. The horizontal parting and box-striking injection molding machine uses the sand box to shape, the sand type is made well and the type-box is unpacked, the lower core is more convenient, and the productivity is high. The sand thrower uses a rotating blade to throw sand compacted sand. Sand throwing machine is characterized by sand filling and compaction at the same time, the machine structure is simple, light weight, strong adaptability. However, the blades are easy to wear and have low productivity.

There have been some modern low-noise, low-dust, low energy consumption, high modeling accuracy of the molding machine, such as vacuum molding machine, static pressure molding machine, gas impact molding machine and so on. The gas impact molding machine utilizes the energy released rapidly by the compressed gas to generate instantaneous pressure and impact loose sand in the sand box to compact the sand mold. The compactness of the sand mold is high and uniform. This machine has low noise and low energy consumption.

Use 1: Used for making sand casting equipment. Its main functions are: filling sand, filling the loose sand into the sand box; compact sand, compacting the loose sand in the sand box through different methods such as compaction, compaction, shock pressure, and shot pressure. In the process of handling and pouring, etc., it has the necessary strength; from the mold, using different mechanisms to remove the pattern from the compacted sand mold. The molding machine first appeared in the middle of the 19th century. The early molding machine was a simple mechanism for manually compacting the mold, and later compressed air was used as a power for the compaction and compaction of sand. In 1890, a shock-type molding machine emerged, which improved the efficiency of molding and the accuracy of sand molding. The molding machine can be divided into shock pressure type, compaction type, and compaction type according to the method of compacting sand.

2: The shock pressure type molding machine can compact the intrinsic sand type and obtain a compact sand type in the upper and lower parts. Commonly used is a micro-seismic compaction molding machine (see the micro-seismic compaction molding machine), the use of the falling platform and the floating seismic iron collision, micro-seismic compact sand, and then compaction. Microseismic vibrations are replaced by high-frequency (500 to 1000 beats/minute), small-amplitude (5 to 25 millimeter) vibrations in place of the low-frequency (60 to 120 beats/minute), large-amplitude vibration of the impact molding machine. The sand mold made by this molding machine is of good quality and has lower requirements for the foundation.

3: Seismic molding machine This molding machine can be divided into shock and micro-shock molding machine two. The sand box and pattern are fixed on the workbench of the molding machine, and the sand type is compacted by the collision of the workbench with the impact surface of the anvil and the inertia of the sand. The noise of this molding machine is serious, and the compactness of the upper part of the sand mold is very low, and it has been replaced by a micro shock compaction molding machine.

4: The compaction molding machine uses air pressure or hydraulic pressure to press the sand in the sand box through the pressure head or pattern to compact the sand. Its pressure is generally 0.25-0.4 MPa. This type of molding machine has a poor compaction of the sand pattern away from the pressure surface. High-pressure molding machines emerged in the early 1950s and the pressure on the sand plane was above 0.7 MPa. The pressure head of the high-pressure molding machine is divided into several types of structural forms such as a flat head, a forming head, and a multi-contact head. Among them, the high pressure multi-contact molding machine is the most widely used. The head of the high-pressure multi-contact molding machine is divided into many small cubes that can move up and down—contacts. Large hydraulic forces can be obtained through hydraulic cylinders. Pressing in real time, each contact according to the following pattern height (ie pressure sand thickness) to apply the corresponding pressure, so that the sand mold to obtain a high, uniform tightness and hardness. This type of molding machine is equipped with micro-shock shock mechanism, able to adapt to the complex shape modeling. High-pressure multi-contact molding machine uses four-column structure, single station type and double station type. In order to adapt to the production of small and medium-sized batch castings, this molding machine is accompanied by a template quick-change device. When the template is replaced, the molding machine does not have to stop. Using high-pressure multi-contact molding, sand casting can cast out thin-walled, precise-sized, smooth-surfaced castings.

5:Pressure-type molding machine It uses compressed air to uniformly inject molding sand into the sand box and compact it before applying pressure. Commonly used are vertical type boxless injection molding machine and horizontal type box injection molding machine. Vertical type boxless injection molding machine modeling without sand box, sand directly into the modeling room with a template, the sand made of high dimensional accuracy, due to the sand box on both sides of the cavity, the productivity is high, but the core is difficult , strict quality requirements for sand. The horizontal parting and box-striking injection molding machine uses the sand box to shape, the sand type is made well and the type-box is unpacked, the lower core is more convenient, and the productivity is high.

The sand thrower uses a rotating blade to throw sand compacted sand. Sand throwing machine is characterized by sand filling and compaction at the same time, the machine structure is simple, light weight, strong adaptability. However, the blades are easy to wear and have low productivity.

6: There have been some modern low-noise, low-dust, low energy consumption, high modeling accuracy of the molding machine, such as vacuum molding machine, static pressure molding machine, gas impact molding machine. The gas impact molding machine utilizes the energy released rapidly by the compressed gas to generate instantaneous pressure and impact loose sand in the sand box to compact the sand mold. The compactness of the sand mold is high and uniform. This machine has low noise and low energy consumption.

The use of point molding machine is a common casting machinery and equipment. When using the molding machine, pay attention to its operating points to ensure the safe use of the work. Many people are not very familiar with the use of molding machines and believe that they can operate normally only if they are put into use. The correct and safe use of the molding machine can extend the working life of the molding machine and improve the production quality. The main points of safe operation of the molding machine are as follows:

1. When the molding machine is used, the operator should be familiar with the molding machine's mechanical parts, electrical parts, operating procedures, lubrication systems, and other requirements specified in the equipment.

Molding machine compact sand type program 4 steps: tapping, indenter into, compaction, indenter out of the molding machine from the mold program: table clamping, lifting the lifting bar, carrying away the sand box, chassis reset 2. When the molding machine is used, before starting the equipment, it is necessary to check whether the lubricating device of the molding machine is perfect, and add fuel according to the regulations, check whether the tight parts are tight, whether the operation handles are at zero position (vacancy), and whether the valve action is Flexible, with or without leaks in the tubing, then open the total gas valve to vent the product gas and stagnant water in the tubing.

3. It is forbidden to open an empty car. It is necessary to conduct a test run under load and check whether the working conditions are normal. Lubricate the refueling area. Normal work can be performed after the test.

4. When the molding machine is used, it is necessary to carefully observe the operating conditions. In the operation, the air should be used to blow away the sand from the lubrication part and the operation part. It is forbidden to stick sand to each lubrication part.

5, when the molding machine is used, the operation should be stable when opening and closing the handle valve.

6, to complete the modeling work to clean up the table before the start of the second modeling work.

7. After the molding machine is used, it is necessary to return the handle to zero (empty) position, close the valves, clean the equipment, clean the site, keep the sliding and rotating parts of the equipment clean and lubricate, and carefully check the tools and molds.

After the failure detection of the molding machine is put into production, it is necessary to pay attention to the failure detection of the molding machine, otherwise, the machine will easily fail. The fault detection of the moulding machine is mainly carried out in five aspects, including the indenter part of the moulding machine, the shock part, the compaction part, the part from the mould, and the operation.

First, the molding machine fault detection head part of the molding machine in use for a period of time, the pressure head can appear to be sluggish, slow, should follow the following methods for molding machine maintenance.

1. When the molding machine malfunctions, check the gap between the front and the back of the molding machine's indenter and check if there is any obstacle such as iron or other foreign matter.

2, open the pressure head on the back of the two intake pipe, respectively, the control valve is pulled in place and placed into the mouth to see if the inlet is large enough, if the intake air volume will cause the head to swing slowly, molding machine fault detection If this is the reason, the valve can be inspected until the air is filtered and blocked.

3, molding machine head above the cover, open the observation rack is seriously rusted, if this molding machine failure occurs, will also cause the pressure head to be dull, can be used kerosene or petrol can be cleaned.

4. When the molding machine malfunctions, if the above situation does not occur, the flanges on both sides of the indenter should be opened to check whether the Y-rings on both sides of the rack are aging and deformed. If so, the indenter can also be slow.

5, the last resort, open the upper flange on the back of the molding machine indenter, check whether the gear bearing butter deterioration, if so, can be washed with kerosene or gasoline, while moving the pressure head, will feel more and more loose.

Second, the modeling machine failure detection shock part of the molding machine shock shockless or not shock there are several reasons.

1, the molding machine failure detection encountered air filter air blockage, due to the vacuum pump work process to generate some water, long time with some foreign matter in the pipeline will air filter air filter plugged, the pressure gauge looked at this time The pressure is not small, but the air flow is not enough, causing the machine to slam.

2. Due to prolonged vibration, the following molding machine failures will occur: The six M20 hexagon screws that connect the shock table and the shock piston loosen, causing gaps between the shock table and the piston, and the work flow leaks from here, causing shocks. Weakness, especially shocking after compaction.

3, between the piston and the pump iron is not lubricated, rust occurs, it can also cause shock and inability to solve the molding machine failure, can open the shock tube to the rubber tube, inject a pound of kerosene or gasoline, and then on, Start shock, then the sound of the shock will have a very obvious change.

Molding machine operating procedures Molding machine for making sand-type casting equipment. The main functions of the molding machine are: filling, filling loose sand into the sand box; compact sand. The molding machine is widely used in industrial production. How to safely operate the molding machine is a concern for each manufacturer. The following describes the molding machine safety operation procedures.

Molding machine operating procedures:

1. Observe the general operating procedures of molding machines and core machines.

2. When the molding machine starts the mold, the ejector pin must be steady and synchronized with it, otherwise, the maintenance personnel will be notified to repair it.

3, molding machine pressure in real time, pressure sand transfer beam should be a smooth rotation, do not operate too hard, resulting in impact.

4. The operator must pay attention to whether the mold is good before and after the production, and whether the outer mold and the positioning pin of the core mold are matched.

5, the staff operating the molding machine should be focused.

6. After the molding machine is completed, the mold should be lifted to the specified pouring point (line) according to the process specification. Place neatly and press the iron or the lock box. Miscellaneous items must be marked.

7. Molding machine sand boxes are not allowed to be stacked too high, generally not more than two meters. The tools used must be stacked neatly to prevent accidents.

8. When using a blowtorch, pay attention to safety and prevent fire. Use a running light that must be a low-voltage light bulb below 36V and disable the high-voltage light bulb above 220V.

9. When using the molding machine, it is necessary to check whether the spreader is good or not. When hoisting, the chain should be straightened and the chain should be straightened. It is not allowed to lift obliquely and overloaded.

10. It is forbidden to repair the mold under the lifting sandbox. Large sand boxes must be squared up when they are unpacked and turned over.

11. The sand box used by the molding machine must be firm and free from cracks and bending.