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Tag search results for: "crate mould"
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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:

Baffle

Spherical cooling channel for cavity and core insert

Extremely conductive alloy

Foaming

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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xiu Apr 22 '19 · Tags: crate mould, dustbin mould
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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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xiu Apr 18 '19 · Tags: crate mould, dustbin mould
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The temperature of the Crate Mould(FURNITUREMOULD) affects the overall cycle, shrinkage, warpage and different characteristics of the cast components. Copolyesters require cooler moulds than many different plastics, so predicting cooling requirements in advance (ie, through injection mould blueprints) pays off in terms of reduced cycle time and processability. Higher crate mould temperatures can cause adhesion. Uniform local hot spots where adhesion may occur increase the cycle.

In order to reduce the entrance blush, unfolding or all, the filling speed for the copolyester is reduced compared to many different plastics. A machine with filling speed programming capability is recommended.

The screw should be operated at the lowest speed so that it can recover 3-6 seconds before the crate mould opens. This reduces viscous heat generation, which has a tendency to standardize the melt and reduces dead time.

A typical problem with direct gate assemblies is usually to reduce the gap on the basis of the runner. A long hold time of 8.1-12.1 seconds and a minimum holding pressure of 276-551 bar (4,000-8,000 psi) (nozzle polymer tension) will supply the polymer to the injection port at a rate at which voids are removed, but will not an over-inject package. In general, if the cooling timer is reduced by the amount of increase in the hold timer, there is no need to extend the cycle time. At the junction of the runner and the suction pin, the standard runner can also form a constricted void; this can be eliminated by utilizing the aforementioned method.

Cushion size

The buffer size should be large enough to ensure that the screws do not touch the base and that the packaging and holding pressure is transmitted to the part. Depending on the machine size and injection speed, the mat remaining after the cycle of packaging and holding is typically 3-13 mm (0.125-0.5 inches). Larger mats increase the residence time in the barrel and cause deterioration. After the shooting, the screw continues to move forward to indicate the drip check valve. The drip check valve will be retained to avoid cushioning and may result in random fast shots and shot changes.

Back tension

A typical back tension is 7 -4 -10 C column (100-150 psi), although it may be a minimum of 3.5 bar (50 psi). To increase melt uniformity, increase melt heat or eliminate air retention (air expansion), backside tension can be increased to 28 bar (400 psi). Excessive back pressure can cause the drool to be directly exacerbated into the crate mold because the decompression is usually kept to a minimum.

Usually, a small decompression is used. Decompression may pull the back of the air directly into the nozzle, causing the spray in the spray. A small amount of reduced pressure can be used to reduce drooling.

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xiu Apr 16 '19 · Tags: crate mould, dustbin mould
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Unless an alternative surface treatment is required, all of the Crate Mould(FURNITUREMOULD) surfaces should be highly polished in terms of drawing for cavity and punching. Gate bushings and runners should also be highly polished by flow to aid in the streamlined flow of the polymer and prevent these trends from "bounce."

Chrome plating can be used to improve hardness and corrosion resistance and to improve the release of moulded parts. The degree of finishing depends to a large extent on the amount of polishing before placement. Plating will never improve the surface, it will only add to the bad surface.

Use very corrosive materials such as PVC and certain types of thermoplastic rubber. Stainless steel is often used to combat corrosion. Unfortunately, even the best stainless steel alloys contain impurities and localized iron (iron) regions. These will soon be corroded by corrosive materials, causing pitting on the surface of the steel. With long-running tools, it is recommended to use a cavity area made of stainless steel to prevent this possibility. If a lion stainless steel mould is to be used to mould the corrosive material, the moulding surface must be chrome-plated and the remainder of the tool chrome-plated to protect it.

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xiu Apr 14 '19 · Tags: crate mould, dustbin mould
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Daily inspection

Check out some maintenance items for the Crate Mould(FURNITUREMOULD) of the crates every day..: hydraulic oil level, lubrication, leaks on the pressure line, hose connections, crates and wires, including thermocouple leads. Clean the machine weekly and check the cleanliness of the oil. Less often, the thermocouple should be inspected by inserting the tip into boiling water and ensuring that it indicates 100 °C. The timer can occasionally be checked by the stopwatch and check for leaks in the screw check valve.

Report error

You should be aware of any reports of failures and provide the first convenient opportunity. Items that should be checked regularly (but not necessarily often) include tie rods, tie rod bushings, frame rails and bushings, toggle link bushings and lever pins. The hydraulic cylinder should be checked for leaks in the seal. If any undue wear and tear occur, you can save time by solving the problem at the critical moment by taking the first opportunity. If this procedure is followed, there is no need to plan maintenance and replace worn parts of the stripping equipment every six or twelve months. However, checking every working part of the machine every three hours usually brings benefits to ensure stable production.

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xiu Apr 11 '19 · Tags: crate mould, dustbin mould
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The correct maintenance of the Crate Mould(FURNITUREMOULD) definitely involves a much more versatile approach to the tool's removal from the production stage, with almost no organized crate mould. Regularly inspect, test and correct the method of crates. Typically, such inspections provided by crate mould are performed by unskilled persons. These people are not fully familiar with the principles and practices of the manufacture and manufacture of crates. If the crate mould appears to be in a reasonable state and does not give any serious trouble during the operation. Just rush to clean up, then set aside, instead of always in the appropriate place to store, waiting for the next production order.

As already explained, it is generally not necessary to provide a suitable storage location or equipment, which makes it more difficult for the maintenance engineer to effectively check the condition of the crate mould when not in actual use. It should be remembered that these features can be severely degraded unless careful when storing the mould. These features include:

Wet atmospheric conditions,

Failure to eliminate all moisture from the crates during production stoppage

Indiscriminate contact with the moulding workshop, or the box, other metal objects on the shelves, careless handling, etc.

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xiu Mar 27 '19 · Tags: crate mould, dustbin mould
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Crate Mould(FURNITUREMOULD) tool ejection systems vary greatly in complexity and design. The primary function of any injector system must be to remove the molded part from the mold when opened, thereby allowing the press to be recirculated. Once exiting the crate mould, the assembly is free to fall into the molding area under gravity or otherwise removed, for example. Through the robot. Typically located in the core portion of the mold, the ejection system can be actuated by the opening act of the molding machine or mold.

Some of the most commonly encountered spray components are listed and described below.

(a) Ejector Prohibition: The spray bar mechanically connects the mold injection system to the mechanical interface of the molding machine. The rod can be attached to the mold (for example by means of a thread) or used as a door knocker without any mechanical connection between the mould or machine.

(b) Ejection plate: The ejection lever transmits the ejection force as a single point load to the center of the ejection plate. The applied load is distributed to various components that are attached or contained within the panel assembly. The spray plates must be rigid structures to withstand the relatively high cyclic loads imposed on them during use. If the plate is bent or bent under load, tool wear may occur, which may significantly shorten the life of the mold.

(c) Support column and parallel block: These components pass the clamping force through the die back plate and directly to the core plate around the ejector plate groove. The struts are also used as guides for positioning the ejector plate assembly. The amount of jet stroke available is primarily determined by the total height of the two components.

Thimble and blade: These head components are trapped between the ejector plates. The thimble and the blade are typically located within the core assembly, are located in the reaming hole and are grounded flush with the top plate, and the top plate is fully retracted. Due to the continuous friction within the core, components such as these are prone to wear during use. Most pins and blades mounted on modern molds are standard components, usually produced in large quantities, and catalogs are also ordered. Thimbles and inserts are good examples of standardized applications that reduce tool maintenance and construction costs.

Peeling plate: The use of the peeling plate enables the applied ejection force to be transmitted to the periphery of the molded part, thereby producing a more advantageous spraying method than the pin or the blade. They are often used in thin-walled molded parts to avoid damage. The release panel is located in front of the core panel, above the extended core, which is also used to position the panel, typically a tapered fit. The peeling plate is guided over the main position of the mold. The pop-up force can be applied to the board in a variety of ways, for example, (i) by the opening act of the press; (ii) directly by the jack; (iii) the top board is indirectly pushed through the putter.

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xiu Mar 25 '19 · Tags: crate mould, dustbin mould
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Improper care is the main cause of damage to Crate Mould(FURNITUREMOULD). Using a metal screwdriver to remove the jammed parts can result in scratching the surface of the cavity. This scratching results in a cosmetic defect on the molded part, but may also affect a particular size and cause it to out of tolerance.

It may also act as an undercut and cause subsequent parts to hang without popping or at least breaking. Failure to lubricate moving parts (such as slides and cams or guide pin bushings) will cause the sliding parts to wear out, eventually causing the parts to get stuck.

Crate mould that use an improper rag to wipe the cavity surface can also cause minor, significant damage to highly polished surfaces. Improper processing can cause serious damage, such as when the technician uses too much injection pressure at the start-up and flashes the mold. The flash can be between the guide pin and the bushing, or between the pinholes of the ejector, or between vertical separations, and can force the side walls to move outward or around the sliding mechanism and cam. This locks the mold in place when trying to open it.

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xiu Mar 20 '19 · Tags: crate mould, dustbin mould
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The so-called barrel temperature control refers to how the plastic in the barrel is uniformly heated from the raw material to the plastic viscous fluid, that is, how to configure the temperature of the barrel. The barrel temperature adjustment should ensure that the plastic is well plasticized and can be injected smoothly without causing decomposition. This requires that we do not consciously lower the plasticizing temperature because of the sensitivity of the plastic to temperature and forcibly filling the Crate Mould(FURNITUREMOULD) with injection pressure or injection speed. The melting temperature of plastics primarily affects processability, but also affects surface quality and color.

The control of the material temperature is related to the crate mould. The parts are large and simple, and the part weight and injection volume are close to each other, requiring higher baking temperatures, thin walls, complicated shapes, and high baking temperatures. For thick-walled parts, some of which require additional operations, such as mounting inserts, can be used to lower the temperature of the oven. To determine if the temperature of the plastic solution is appropriate, use a jog operation to observe the low pressure air and observe the appropriate temperature. The material should be sprayed vigorously, vigorously, without foam, without curling, and with continuous illumination.

The material temperature is generally configured in ascending order from the feed portion to the discharge portion, but the excessive exposure of the plastic to prevent decomposition and the change in the color of the part may also be slightly lower than the middle portion. The incorrectly configured material temperature may sometimes result in the card's screw. Fault, the screw will not rotate or idle. It is also possible that the injection pressure is too high or the screw check ring (meson) does not allow the thin molten material at the front of the cartridge to flow back into the feed zone.

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xiu Mar 18 '19 · Tags: crate mould, dustbin mould
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