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Injection Table Mould is a part that gives plastic shape and size during moulding. Although the structure of the table mould may vary greatly due to the variety and performance of plastic, the shape and structure of plastic products and the types of injection machines, the basic structure is the same.

Injection table mould is divided into thermosetting plastic moulds and thermoplastic plastic moulds according to moulding characteristics. According to the moulding process, the mold can be divided into transfer mold, blow mold, casting mould, thermoforming mould, hot pressing mould (compression mould), injection mould, etc. The hot pressing mould can be divided into overflow mould, semi-overflow mould and non-overflow mould in overflow mode, and the injection mould can be divided into cold runner mould and hot runner mould in the gating system. According to the way of loading and unloading can be divided into mobile, fixed two kinds. Table mould is also classified according to different processing techniques. The injection mould injects molten plastic into the cavity of the table mould at a certain speed and pressure. After the plastic is cooled, the mold is opened to take out the molded injection product.

The compression moulding table mould is simply called a compression mould, which directly adds plastic raw materials into an open mould cavity, closes the mold, the plastic becomes a flowing state and fills the mould cavity under the action of heating and pressure, and then hardens and shapes the product through chemical crosslinking or physical cooling.

The compression moulding table mould uses a heated mold to heat and press the plastic sheet into shape, then opens the mold, takes out the moulded product, and puts it into cold water for shaping and cooling. Compression moulding is an important technical process in moulding and processing. It is widely used in industrial production and processing and plays an important role in people's lives. Generally, powder, granule, pellet, sheet or even a blank with a shape similar to that of the product is put into the cavity of a heated table mould, then the mold is closed and pressurized to form and solidify or vulcanize the product, and then the product is obtained by demoulding. This method is especially suitable for forming thermosetting plastics (see thermosetting resin). Disadvantages are long production cycle, low efficiency and poor dimensional accuracy of products.

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xiu Mar 24 · Tags: table mould

Heat treatment of Air Cooler Mould(FURNITUREMOULD) is an important process to ensure mould performance, which has a direct impact on the manufacturing accuracy of air cooler mould, the strength of plastic mould, the working life of mould, and the manufacturing cost of mould.

The heat treatment of air cooler mould is to exert the potential of mould material and improve the service performance of mould. The performance of the air cooler mould must meet the following requirements: high strength (including high-temperature strength, cold and hot fatigue resistance), high hardness (wear resistance) and high toughness, and also require good machinability, (including good polishing) weldability and corrosion resistance, etc.

The deformation of air cooler mould after heat treatment is generally believed to be caused by cooling, which is incorrect. For complex dies, the correctness of the heat treatment process often has a great influence on the deformation of air cooler dies. Comparing with the heating processes of some dies, it can be clearly seen that the heating speed is faster and larger deformation often occurs.

(1) The cause of deformation

Any metal will expand when heated. As steel is heated, uneven temperature (i.e. uneven heating) in each part of the same mould will inevitably lead to an inconsistent expansion in each part of the air cooler mould, thus forming internal stress due to uneven heating. At the temperature below the transformation point of steel, uneven heating mainly produces thermal stress, and uneven heating beyond the transformation temperature will also produce uneven microstructure transformation, which not only produces microstructure stress. Therefore, the faster the heating speed is, the greater the temperature difference between the air cooler die surface and the core, the greater the stress and the greater the deformation of the air cooler die after heat treatment.

(2) Preventive Measures

When heating complex dies below the phase change point, they should be slowly heated. Generally speaking, the vacuum heat treatment deformation of air cooler dies is much smaller than that of salt bath furnace heating quenching. Preheating is adopted, and one-time preheating can be adopted for low alloy steel moulds. For high alloy rigid moulds, secondary preheating shall be adopted.

If you are interested in our products, you can click Table Mould to learn more information.

xiu Nov 26 '19 · Tags: air cooler mould, table mould

During the use of Table Mould(FURNITUREMOULD), mould wear is a common phenomenon and inevitable. What we can do is to minimize the wear of the table mould and prolong its service life. When we reduce the wear of the table mould, we must first know why the mould wears.

The root cause of table mould wear is the mutual friction between mould parts and parts (or blanks) or between mould parts and parts. Wear leads to mould failure, which is manifested as blunting of blade gate, rounding of edges and corners, plane subsidence, surface groove marks and peeling of the mucosa. In addition, during the work of the punch, the lubricant is converted into high-pressure gas after combustion, which severely scours the surface of the punch and forms cavitation.

During cold punching, if the load is not large, the wear type is mainly oxidation, and the wear can also be occlusal wear to some extent. When the cutting edge becomes blunt or the punching load is large, the occlusal wear will become serious, thus accelerating the wear. In the case of severe carbide segregation or large particle carbides in mould steel, these carbides are easy to flake off, causing abrasive wear and accelerating the wear.

The impact of light cold work mould steel (sheet blanking, stretching, bending, etc.) is not heavy, mainly static wear. Under the condition of static wear, the mould steel contains more carbon and its wear resistance is greater. Under impact wear conditions (such as cold heading, cold extrusion, hot forging, etc.), excessive carbides in mould steel do not help to improve wear resistance but reduce wear resistance due to impact abrasive wear.

The above is an introduction to the causes of mould wear analyzed for everyone. in general, under the condition of impact abrasive wear, the carbon content of mould steel is limited to O.6%%, and the cold heading mould works under the condition of impact load, such as too much carbide in mould steel, which is easy to cause solid impact wear and peel off the surface. These exfoliated hard particles will become abrasive particles, accelerating the wear rate. Therefore, in the mould work, we should reduce the occurrence of this kind of situation.

If you are interested in our products, you can click Air Cooler Mould to learn more information.

xiu Nov 5 '19 · Tags: air cooler mould, table mould

There may be a series of situations in the process of Chair Mould(FURNITUREMOULD) processing customization. In fact, one of the phenomena that we have to face is the bending deformation of chair mould processing. So during the whole processing, besides considering the final requirements or installation, we should also consider the performance of chair mould processing and equipment. In this case, we have to consider the fluidity of more chair mould processing. Then why do chair mould processing customization have some bending deformation?

I. Mould

In the process of customizing the chair mould processing, basically if such a situation occurs, it is believed that the door may be located improperly or in insufficient quantity, or the top product may not be located uniformly.

II. Technology

More technical factors will be taken into account when customizing the chair mould processing. For example, it may be considered that the temperature of the machine pipeline is extremely high, or the injection pressure is extremely high, and there are other situations where the injection is too fast. The heat preservation time is relatively long, and the cooling time is also very short.

III. Raw Materials

When all the raw materials are actually processed, they will affect the final cleanliness and lead to the deformation of the whole product.

IV. Product Design

When the chair mould is customized, each product has its own design style in the process of design. For a simple example, different chair mould has different design requirements because they have different requirements during processing.

Through the above content, we should consider the actual situation in the process of processing the chair mould. When bending deformation occurs, it must be adjusted first to a reasonable state for processing.

If you are interested in our products, you can click Table Mould to learn more information.

xiu Oct 29 '19 · Tags: chair mould, table mould

The application of the Table Mould(FURNITUREMOULD) formwork is different from that of the cold die. The table mould formwork is generally used between 150-200 degrees. In addition to some pressure effects, there is also the effect of temperature on it. Today, Xiaobian gives you a brief introduction of what kind of steel from four angles can meet the requirements of the table mould formwork:

First, it must have certain hardness and wear resistance, so as to ensure that it will not cause some adverse effects due to excessive pressure and friction during use. In addition, it is also necessary to determine the stability of the mould frame size and shape, so that it can be used for a longer period of time. The chemical composition of the steel and the heat treatment hardness will affect its wear resistance, so the hardness of the mould frame can effectively improve its wear resistance.

Second, many mould frames need to be cut during use. In order to avoid damage to the cutting tool and to make it have the better cutting ability, the hardness of the steel used in the formwork must be within an appropriate range.

Third, the selected steel should have good thermal stability, which is beneficial to the processing after quenching and improve the precision of the formwork.

Fourth, it requires better polishing performance. The impurities in the steel should not be too much. There will be no problems such as pitting during polishing to ensure the quality of the mould base.

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xiu Aug 25 '19 · Tags: chair mould, table mould

In life, you often see many plastic chairs, all kinds of, there are ordinary dining chairs, armchairs, armchairs, and public facilities chairs. So how do these chairs come out, and what is the craftsmanship of the Chair Mould(FURNITUREMOULD)? What are the points of attention in the process of making a chair mould?

The chair mould should pay attention to the superposition problem, product weight, strength and wall thickness. If a chair has multiple artboard backrests, be careful when designing the panels.

The problem that the chair mould needs to pay attention to during production: 1. The cooling water device has a good cooling effect. 2. Whether the product is overweight. 3. Is the Haval line good enough to see if there is a hand cut? 4. The surface of the mould is required to be polished. The product cannot be cut after it is printed.

After the chair mould is opened, what key points to check: 1. Wall thickness. 2. Weight and load bearing. 3. Overlay. 4. Whether the classification is smooth. 5. The ribs are polished and there is no white plucking. 6. Exhaust. 7. Miniature. 8. Flower board content. 9. Is there a non-slip design on the sole of the chair.

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xiu Aug 11 '19 · Tags: chair mould, table mould

What kind of Table Mould(FURNITUREMOULD) is a good mould? What we produce can only be considered by customers. For customers, when signing the contract, we mainly consider the following aspects: mould cost, mould production cycle and mould quality.

These three aspects are quite different for different users. For example, for users who develop their own products to provide plastic parts to the market, they may give more consideration to the cost and production cycle of table moulds. For mould users required by the complete machine factory, they may give priority to the production cycle and quality of moulds. For users of matching products supplied to the complete machine at fixed points, they may have a more comprehensive consideration on these three aspects.

For the cost of table mould, the user's requirement must be the lower the better under the premise of meeting the requirement, and the quality of the mould is mainly measured by the following criteria: mould yield, mould life and mould usability, etc. The precision and quality of the mould can also be measured by the precision and quality table of plastic parts, mainly including no surface defects, low surface roughness, bright or dull surface, high assembly dimensional precision, etc. Generally speaking, the quality of the table mould directly affects the quality of the plastic parts and the injection cost of the plastic parts, and the high-quality mould will definitely increase the manufacturing cost of the mould.

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xiu Aug 5 '19 · Tags: chair mould, table mould

1. Check if the plastic material in the barrel is correct and whether it is baked according to the regulations.

2. The cleaning of the material pipe should be thorough, in order to prevent the inferior compound or miscellaneous material from being injected into the Chair Mould(FURNITUREMOULD).

3. Adjust the pressure and the amount of injection to produce a finished product with satisfactory appearance.

4. Be patient and wait until the conditions of the machine and chair mould are stable.

5. The advancement time of the screw should not be shorter than the time when the plastic of the gate is solidified, otherwise, the weight of the finished product will decrease and the performance of the finished product will be damaged.

6. Run the newly transferred conditions for at least 30 minutes to stabilize, and then at least continuously produce a dozen full-mode samples, mark the date and quantity on the holder, and place them separately according to the cavity to test the stability of the operation. And derive reasonable control tolerances.

7. Compare the dimensions of each chair mould sample. Note:

(a) Whether the size is stable.

(b) Is there a tendency for certain dimensions to increase or decrease to indicate that machine processing conditions are still changing, such as poor temperature control or oil pressure control.

(c) Whether the change in size is within the tolerance range.

8. If the finished product size does not change and the processing conditions are normal, it is necessary to observe whether the quality of each finished product of the cavity is acceptable, and the size can be within the tolerance. Make a note of the number of holes that are continuous or large or smaller than the average to check if the size of the chair mould is correct.

At present, the mould temperature is often neglected during the test of the factory, and the temperature of the chair mould is the most difficult to grasp during the short-term test and future mass production. The incorrect chair mould temperature is enough to affect the size, brightness, shrinkage, flow pattern and material of the sample. And soon, if you do not use the mould temperature controller to hold the mass production in the future, it may be difficult.

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xiu Aug 5 '19 · Tags: chair mould, table mould

In the test mode of the Table Mould(FURNITUREMOULD), you need to pay attention to the following points:

1. To achieve the end of filling, the plastic requires a total pressure of 2200 psi.

2. In order to reach the middle part of the product, the plastic requires a total pressure of 2200 psi.

Based on the above two points, the process is limited by pressure.

The plastic requires a pressure of 1379-983 = 396 psi to reach the end of the third splitter from the end of the secondary splitter. In order to flow through the gate, the plastic requires a pressure of 1897-1379 = 518 psi.

Therefore, the three-stage flow passage and the gate seem to have a relatively large pressure drop, so the three-stage flow passage and the gate should be enlarged. This will reduce the final pressure at the end of the fill to 1901 psi. This process is no longer limited by pressure. Ensuring adequate injection pressure helps achieve consistent table mould filling. Pressure drop research is one of the most important steps in the table mould certification process.

Finally, remember the rule of thumb: The maximum injection pressure required should not exceed 80% of the maximum pressure available to the injection moulding machine.

Values above 80% should be lower for thicker products that require higher holding pressure. To avoid sudden increases in pressure between different components, the transition should be as smooth as possible.

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xiu Jun 19 '19 · Tags: chair mould, table mould

The mould company tells you that Table Mould(FURNITUREMOULD) processing has the following basic characteristics:

The machining accuracy is high. A pair of moulds generally consists of a die, a punch and a die, and some may be more split modules. Therefore, the combination, the lower die, the combined block and the cavity, require high machining accuracy to separate between the modules.

In small batches, mould production is not produced in batches, and in many cases it is often only produced one.

The shape is complicated, and some products such as automobile parts, aircraft parts, toys, household appliances, the surface shape is determined by various curved surfaces, and therefore, the cavity surface is very complicated. Some surfaces must be processed mathematically.

Process, table mould processing must use milling, boring, drilling, reaming and tapping. High hardness, excellent mould material, the main material of the mould is made of high quality alloy steel, especially the long life of the mould, often using Crl2, CrWMn and Leysite steel. This forged, machined and heat treated steel has stringent requirements.

Repeated operation, when using a table mould is to use a mould during its service life, it must be replaced with a new mould, so mould production is usually repeated.

Sectional drawings, sometimes without pattern mould production, no data, and processing materials according to profiles. This requires imitation precision and no distortion.

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xiu May 22 '19 · Tags: chair mould, table mould
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