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The steel material of the Crate Mould(FURNITUREMOULD) is generally 718 or 2738, and it has to undergo multiple processing steps such as forging, CNC milling, roughing, quenching and tempering, and CNC milling. The plastics in the crate are generally plastics such as HDPE and PP.

The crate mould is generally a four-point hot runner, and the pusher plate is ejected. The advantages of using hot runners are: 1. Material saving, no need to cut gates, and then crush. 2. Speed up the cycle and increase production efficiency. 3. Reduce costs in the long run.

The crate mould has the following special requirements: 1. The exhaust effect is better, otherwise the plastic products will have black spots, etc., and the burnt will be severe. 2. The superimposed effect is better, the superimposed does not shake. 3. The line is better, no grind. 4. The mould should be highly polished, because the crates are daily necessities, so there should be no flash, burrs, etc., to avoid scratching the skin.

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How to make a Crate Mould(FURNITUREMOULD)? First, the steel material should be selected for the mould base and the mould core cavity portion. For example, to produce a pair of four-out crate mould, pre-hardened steel with a hardness higher than 33 must be used as the mould base, and then the appropriate mould standard parts should be selected. Second, the hardness of each piece of steel must be controlled, not too hard.

Then, the friction and guiding parts of the crate mould must be finished and no manual work can be used. If you need to mould a durable tote, you must use a low melt index HDPE material, such as a plastic with an index of 4 or 6. Second, make sure the cooling system is optimal. To create a durable and durable hydraulic drive with the machine for automatic ejection, the ejection action during mould opening can be smoother.

Most of the world's crate mould manufacturers use accelerators to increase the injection speed of the melt. The design of the crate mould is equally important. The ejection mode of the crate mould is preferably designed to be mechanically ejected, so that the ejection operation can be completed when the mould is opened.

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Different types of Chair Mould(FURNITUREMOULD), different types of moulded plastics (same type of mould), different assembly methods vary with different start and precision requirements. Therefore, the assembly drawing and part drawing should be carefully studied before assembly. Determine the assembly baseline by understanding the function, characteristics, and technical requirements of each component. After careful assembly, all quality indicators of the product have been achieved, including the accuracy of the mould movement and other technical requirements during use.

Assembly standard

Assembly data refers to the data used to determine the relative position of parts or components in a product during assembly. It can be broadly divided into:

(1) Main working parts, such as cores, cavities and inserts, shall be used as assembly reference parts;

(2) Take the template side base surface of the guide sleeve or mould as the assembly base surface.

2. Assembly accuracy

Assembly accuracy refers to geometric accuracy, machining accuracy, and motion accuracy after assembly. The assembly accuracy of the chair mould includes:

(1) mutual accuracy of each part, such as distance dimensional accuracy, coaxiality, equality, verticality, etc.;

(2) Relative motion accuracy, such as transmission accuracy, linear motion and rotational motion accuracy;

(3) matching accuracy and contact accuracy, such as matching gap and overflow contact conditions;

(4) The wall thickness of the plastic moulded part. When manufacturing a new mould, the wall thickness of the moulded part should deviate from the lower limit of the size.

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xiu May 19 · Tags: chair mould, crate mould

The Chair Mould(FURNITUREMOULD) layout inspection project is an important part. In the face of the chair mould layout design, it is necessary to carefully analyze and study the layout design. After the completion of the layout design, it will be repeatedly reviewed to prevent cracks. Once found, improve the design and correct the errors in different parts of the layout to check and content. Different.

In general, the chair mould layout inspection items have the following types: 1 Check whether it is necessary to meet the required assembly position in the mould strength and open mode, and should minimize the empty station and check whether the material utilization rate is the best utilization plan. Precision parts can ensure the accuracy of the parts due to the feeding accuracy of the stripping material. The positioning accuracy and precision of the mould will affect the dimensional deviation of the parts. The size of the high-precision joints should be in the same position of the forming or take other measures to ensure the accuracy of the parts. Such as the flatness and verticality required for the product.

In addition to the chair mould structure, it should be noted that the necessary process should be added to ensure that the progressive die adaptive structure of more than four die structures is used for the splicing type of single piece, segment or sub-module, such as the determination of the chair mould structure should check the layout Whether it is suitable for the requirements of 5 bending depth stretching forming process, such as moulding, due to the flow of material, can cause material flow Oude hole and shape deformation material flow Oude hole and shape should be placed in the deformation process, or increase the dressing process from above Look at the project, the reliability of the carrier strength, the parts have formed parts have any influence on the feed, the burr direction is bending deformation, the curve line of the curved part material is vertical or 45°, e tc. These small also need to be checked in place"

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xiu May 14 · Tags: chair mould, crate mould

Crate Mould(FURNITUREMOULD) design is an important part of the large-scale product development process. Because product and mould design are interdependent, it is useful for product design engineers and mould design engineers to understand the development of plastic parts, the mould design process, and the mould manufacturing process. Typical stages of product development include: product definition, product design, experience and product development, capacity enhancement, and marketing.

Although the product development process is complex, most have the following three key attributes:

1. Develop a systematic development plan to ensure the perfection of design and manufacturing.

2. Establish a checkpoint process to avoid risks by effectively assessing budget allocations in key areas of the project.

3. The product development process is divided into multiple stages through the approval fee level. The next phase evaluates the previous phase.

(1) Product definition

The product development process begins with an analysis of the market, an understanding of competitor product standards, a definition of product specifications, and an assessment of potential profits.

(2) Product design

If the project is approved and budgeted, the product development process will continue, often requiring additional funding and then further analysis and design.

(3) Development of business and production

Crate mould design and manufacturing is the focus of the plastics industry and is included in the “Mould Making” campaign.

(4) Zoom in and put into production

Use a high-level management review to verify that the design and production plan of the product being developed is clear.

(5) mould design function

Mould quotation, mould design, and mould manufacturing support large product development processes.

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The runner supplies the plastic directly to the finished product and the runner adheres to the finished product. In the Crate Mould(FURNITUREMOULD) of the two plates, the large water outlet is usually one, but in the design of the crate mould of the three plates or hot runners, it can be a plurality of water outlets.

Disadvantage: The appearance of the finished product will be affected by the appearance of the watermark formed on the surface of the finished product.

The angle of the demolding nozzle and the length of the nozzle:

The diameter of the nozzle is affected by the diameter of the nozzle. The spray angle of the nozzle should not be less than 3 degrees. Therefore, only the length of the nozzle can be shortened, and the length of the nozzle can be lengthened.

Gate selection:

The gate is the connection between the runner and the cavity and is the last part of the crates mould supply system. Its basic functions are:

The molten plastic from the runner enters the entire cavity as quickly as possible.

After filling the cavity, the gate can be quickly cooled and closed to prevent the cavity from flowing back uncooled plastic.

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The design of the gate is related to the size of the plastic part, the shape and the mould structure of the Crate Mould(FURNITUREMOULD), the conditions of the injection moulding process and the performance of the plastic part. However, in terms of basic functions, the gate portion should be small and the length should be short, as this is the only way to increase flow rate, rapid cooling and sealing, separation of plastic parts and minimal residual marking.

Regardless of whether the product is filled or not, the flow length determines the injection pressure, and the clamping force and shortening of the entire flow length reduce the injection pressure and clamping force.

The gate position will affect the pressure holding pressure, the pressure holding pressure and the pressure maintaining pressure balance. Keep the gate away from the stress position of the product (eg bearing position) to avoid residual stresses. Exhaust gas must be considered at the gate location to avoid wind accumulation.

If there is no balanced runner system, the following gate balancing method can be used to achieve the goal of uniform injection moulding. This method is suitable for crates moulds with a large number of holes.

There are two ways to balance the gate: change the length of the gate trench and change the cross-sectional area of the gate. In another case, the balancing door is also required when the chambers have different projected areas.

At this point, in order to determine the size of the gate, it is necessary to determine the size of one of the gates, find the ratio of its gate volume to the corresponding cavity volume, and apply the ratio to the gate and the corresponding gate comparison cavity, and then calculate The size of each door.

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For crate mould, we pay more attention to Crate Mould(FURNITUREMOULD) design in order to obtain crate mould in a sufficient cooling system. This will allow the box mould to avoid zone hot pots and achieve uniform cooling for rapid cycle moulding. In addition, we offer a good slat ventilation solution design for the crate handling area and the crates strength points.

Through the processing of crates, the Chinese team values ??the size control of the crates, so that each part is in good working condition. It keeps the mould within the tolerances of the tool and does not cause any scratches. With these, we keep our crate mould faster than our competitors. In addition, we are confident to run our crate mould and mass production simulation process, confirm the cycle time and then ship it to you.

Taizhou Huangyan Rongwei Plastic Mould Co., Ltd.is located in Huangyan, which is the mould town in China. Our company has more than 20 years of professional experience in mould field. We have the most advanced equipment for mould manufacturing as well as the most qualified trained employees. We have made full use of high techniques as CAD/CAM/ CAE for a long time and summarized a set of specific experience. Our mould is mainly exported to the countries in Europe, Mid-East, Africa and so on.

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Standard Crate Mould(FURNITUREMOULD) temperatures help ensure uniform heat exchange on each wall surface. This may put the components in equilibrium and the wall thickness of the supply is uniform. The basic elements of management. Crate mould should be developed to adequately manage temperatures from the range required for material processing. This not only reduces the amount of residual tension but also reduces cycle time.

Technologies to get the right core cooling to include:


Spherical cooling channel for cavity and core insert

Extremely conductive alloy


Any of these techniques are suitable to provide a heat removal capability sufficient to maintain a uniform temperature along the length of the core. Even if proper core cooling can have an impact on crate mould manufacturing costs, as long as the crates are put into production, it can reduce cycle times and improve part quality.

Baffles and bubblers are two of the most typical techniques used to provide core cooling. With this configuration, a thin blade is inserted from the hole along the length. This divides the bore into two semi-circular flow channels. Water moves from inside the core of one side of the baffle blade and then slightly lower from the other side of the blade.

The bubbler is very similar to the baffle except that water passes from the core with the bubble tube towards the finisher. Water returns from the core through the annular space between the bubbler tube OD and the core ID.

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Design parts to ensure that the Crate Mould(FURNITUREMOULD) is properly cooled, and you can reduce cycle times and high-quality parts while reducing the price. Good cooling is critical when proposing crates.

Some results of poor cooling:

Increased cycle time

Uneven cooling between parts or parts

High residual tension

Increased warpage

Adhesives and problems in ejection

Even though all of the above problems can be serious problems, the most typical difficulties may be stay and ejection problems. We are unable to fully pay attention to the importance of crate mould cooling, especially in cores. By following the powerful core cooling principles, you can significantly improve the processing window and achieve good results in terms of overall component performance.

An effective and critical cooling method is to ensure that there is turbulent water flow in the cooling circuit. When the water stream is laminar, the heating from the crate mould only enters the outer layer from the water as it flows through the channels. The outer water does not mix with the cooler inner layer and does not fully utilize cooling.

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