What do you mean by trial?

Question 1: Generally, the mold trial is extracted from the Internet several times, which is useful: 1. Understand the relevant information of the mold: it is best to obtain the design drawing of the mold, analyze it in detail, and invite the mold technician to participate in the mold trial. 2. First, check the mechanical cooperation action on the workbench: pay attention to whether there are scratches, missing parts and looseness, whether the slide plate in the mold direction is correct, and whether there is leakage in the waterway and trachea joints. If there are any restrictions, please indicate that the mold is open. If we can do the above actions before hanging the formwork, we can avoid the waste of working hours when we find problems in the process of hanging the formwork and then dismantle the formwork. 3. When it is determined that all parts of the mold are working normally, it is necessary to choose a suitable trial injection machine, and pay attention to (a) the injection amount (b) the width of the guide rod (c) the maximum opening distance (d) whether the accessories are complete and so on. After everything is confirmed that there is no problem, the next step is to hang the mold. When hanging, be careful not to take off the hook before locking all clamping templates and opening the mold, so as to avoid loosening or breaking the clamping templates and causing the mold to fall. After the mold is installed, carefully check the mechanical actions of various parts of the mold, such as slide plate, ejector pin, tooth withdrawal structure, limit switch, etc. And pay attention to whether the nozzle is aligned with the feed inlet. The next step is to pay attention to the clamping action. At this time, the clamping pressure should be reduced, and attention should be paid to whether there is unsmooth action and abnormal sound during manual and low-speed clamping actions. 4. Raise the mold temperature: According to the performance of the raw materials used in the finished product and the size of the mold, select an appropriate mold temperature controller to raise the mold temperature to the temperature required for production. After the mold temperature rises, it is necessary to check the movements of all parts again, because the steel may stick to the mold after thermal expansion, so it is necessary to pay attention to the sliding of all parts to avoid strain and vibration. 5. If the factory does not implement the rules of the test plan, we suggest that only one condition can be adjusted at a time when adjusting the test conditions, so as to distinguish the influence of a single condition change on the finished product. 6. According to different raw materials, bake the raw materials properly. 7. Try to use the same raw materials for mold trial and future mass production. 8. Don't try the mould completely with inferior materials. If you have color requirements, you can arrange color trials together. 9. Problems such as internal stress often affect the secondary processing, so the finished product should be processed after the die test is stable. After the clamping is slow, the clamping pressure should be adjusted and acted several times to check whether there is uneven clamping pressure, so as to avoid burrs and mold deformation in the finished product. After checking all the above steps, reduce the clamping speed and pressure, set the safety button and ejection stroke, and then adjust the normal clamping speed and clamping speed. If the limit switch with the maximum stroke is involved, the mold opening stroke should be adjusted slightly shorter, and the high-speed mold opening action should be cut off before the maximum mold opening stroke. This is because the stroke of high-speed operation is longer than that of low-speed operation in the whole mold opening stroke during mold loading. In the molding machine, the mechanical ejector pin must also be adjusted after the full-speed mold opening action, so as to prevent the ejector pin plate or stripper plate from being deformed. Please check the following items again before the first injection: (a) Whether the feeding stroke is too long or insufficient. (b) Whether the pressure is too high or too low. (c) Whether the mold filling speed is too fast or too slow. (d) Whether the treatment cycle is too long or too short. In order to prevent the finished product from material shortage, fracture, deformation, burr and even damage to the mold. If the processing period is too short

Question 2: What are the common problems in mold trial? 1. Insufficient plastic parts: mainly due to insufficient supply, poor melt filling flow, over-inflation, poor exhaust, etc. The shape of plastic parts is incomplete, or a single cavity is not filled with multiple cavities. 2. Unstable size: mainly due to poor strength and precision of the mold, unstable operation of the injection molding machine and unstable molding conditions. Unstable dimensional change of plastic parts. 3. Bubble: The residual gas in plastic parts due to excessive expansion of molten materials or poor exhaust is small in volume or a series of holes (it should be distinguished from vacuum bubbles). 4. Collapse pit (dent) or vacuum bubble: Due to poor pressure maintenance and filling, uneven wall thickness and large plastic shrinkage, the cooling of plastic parts is uneven. 5. Excessive flash: due to poor mold clamping, the gap is too large and the plastic fluidity is too good. Excessive feeding will cause plastic parts to squeeze out excess plates along the edges. 6. Poor welding: Due to the low material temperature when molten materials are merged, resin and accessories are immiscible, and poor welding when molten materials are merged, obvious thin seam lines appear along the surface or inside of plastic parts. 7. Surface waviness of plastic parts: Because molten materials do not flow regularly along the mold surface to fill the cavity, they flow in semi-solidified waves on the cavity surface or the molten materials are stagnant. 8. Poor demoulding: due to strong filling effect. 9. mica flake: due to the mixing of different materials or the low temperature of the mold, the shear effect of the molten material is too large when it flows along the surface of the mold, which causes the thin layer of the material to flake off and the physical properties to decrease by 65,438+00. Gate sticking: Due to mechanical resistance in the gate sleeve, insufficient cooling or pull rod failure, the gate sticks to the gate sleeve 65, 438+065, 438+0, and the transparency is poor: due to molten material and mold surface. There are tiny pits on the surface of plastic parts, which cause light radiation or plastic decomposition, foreign bodies and impurities, or the surface of the mold is not bright, which makes the transparency of transparent plastic poor or uneven. 12. Silver stripes: Due to excessive moisture, aeration and volatiles in the material, excessive shearing of the molten material, poor sealing between the molten material and the mold surface, or rapid cooling or mixing with different materials or decomposition and deterioration, needle stripes or mica flakes with silver luster appear on the surface of plastic parts along the direction of material flow. Poor demoulding, insufficient cooling, insufficient strength of plastic parts, mold deformation, etc. , resulting in distorted shape, uneven warping or eccentric hole, uneven wall thickness, etc. 14. Cracks: Due to the defects (such as deformation) such as excessive internal stress, poor demoulding, uneven cooling, poor plastic performance and poor design of plastic parts, small cracks are generated on the surface of plastic parts and near the entrance. Or cracking or not cracking under the action of load and solvent. 15, black spots and black stripes: due to the decomposition of plastics or combustible volatiles in materials and the decomposition and combustion of air under high temperature and high pressure, combustion products are injected into plastic cavities with molten materials, and black spots and black stripes appear on the surface of plastic parts, or burn along the surface of plastic parts such as carbon 16, and the color is uneven or discolored: due to uneven distribution of pigments or fillers, plastics or pigments change color. Uneven colors are caused by different phenomena. The uneven distribution of pigments near the entrance is the main reason. For example, the uneven color of the whole part is caused by the poor thermal stability of the plastic, and the uneven color of the welded part is related to the properties of the pigment. These are common problems in injection molding.

Question 3: What do you mean by pressing the mold when trying the mold? I wonder if you mean to try plastic molds (molds for producing plastic products with injection molding machines)?

I will try to explain it in simple language.

When testing plastic molds, the general process is as follows:

1. Open the molding motor mold back plate and static mold back plate.

2. Lift the mold and put it between the back plate of the mold and the back plate of the static mold of the forming motor.

3. Align the locating ring on the mold with the measuring hole of the static mold of the molding machine to determine the position.

4. Close the back plate of the molding motor die and the back plate of the static die, and press tightly.

5. Then press the mold on the back plate of the moving mold and the back plate of the static mold of the molding machine with a pressing plate (a small metal contact block) and a locking screw.

When you say dead, I don't know if you mean here. Press the mold on the back plate of the molding machine (some places have different names).

Of course, it is also possible that when you say die, you mean something else. Let me also explain:

When molding products, the mold is opened after closing the mold, and it is found that there is something between the parting surface of the moving mold side and the static mold side (for example, the product moves out of the range of the mold cavity, or something else falls into the gap between the parting surface and the mechanism), or the structural parts do not move smoothly (something is stuck inside), and the mold parts are basically damaged (deformed, broken, sunken, or the mechanism is stuck). This is also the case.

Question 4: What are the meanings of T0 and T 1 during the mold trial in the mold factory? T0, T 1 ... from zero to two rows, that is, the number of mold trials. For example, the first mold trial is T0, the second is T 1, and the third is T2.

Generally speaking, the expression of formwork is m, such as M 1, M2 and M3, which respectively represent the first formwork, the second formwork and the third formwork.

Question 5: What is the TF stage of plastic mold trial? Hello, TF stage is the final trial, and then the trial production.

Question 6: What should I pay attention to in injection molding test? In daily life, we use plastic products, such as lunch boxes, plastic bowls, plastic seasoning boxes, remote control boxes, mobile phone cases, computer boxes and so on. All from injection molding. According to statistics, 60%-80% of products in daily life come from injection molding.

Here are the following points for attention, for communication only.

1. Whether the opening and closing of the injection mold is smooth.

2. Whether the mold is ejected smoothly.

3. Select the gate position and injection mode, gate size and cavity size of the injection mold, and appropriate pressure, speed and material quantity.

4. After the injection mold is heated, open and close the mold several times, and carefully check whether all the matching parts of the mold are excellent. If not, continue.

5. Try short-shot products first when testing the mold, and confirm the combination line and exhaust.

6. Let the quality personnel determine the size and appearance after the product is full.

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Question 7: What do you mean by "dead test 1"? Extend the processing time to stabilize the melt temperature and hydraulic oil temperature.

2. Adjust the machine conditions according to the dimensions of all finished products. If the shrinkage is too large and the injection is insufficient, it can also be used as a reference to increase the gate size.

3. If the size of each mold cavity is too large or too small, please correct it. If the dimensions of the mold cavity and doorway are still correct, try to change the machine conditions, such as mold filling rate, mold temperature, pressure of each part, and check whether some mold cavities are slow to fill.

4. According to the matching of finished products in each mold cavity or the displacement of mold core, the mold filling speed and mold temperature can be adjusted again to improve its uniformity.

5. Check and modify the faults of the injection machine, such as oil pump, oil valve and temperature controller, which will cause changes in processing conditions. In a poorly maintained machine, no matter how perfect the mold is, it can't work well.

After reviewing all the recorded values, keep a set of samples for proofreading and compare whether the corrected samples have improved.

Question 8: What are the stages of plastic mould trial? What is the abbreviation? What needs to be done at each stage? 50 is divided into three stages, namely T 1, T2 and T3. The first stage is testing, the second stage is trial operation, and the third stage is quantitative trial.

Question 9: What are the terms T 1 and T2 in the injection mold test, and what do they stand for? There are prawns, you know? Thank you. T 1 is the first time to mold, and the requirements are different every time: T 1 requires that the product structure is complete, there are no mistakes and leaks, the mold can be demoulded normally, and the mold has no obvious defects. If a structure is omitted, it can be T 1. But T 1 will be recalculated next time. This is a requirement for mold manufacturers.

Usually, regular companies require mold manufacturers to complete all mold tasks in about 3-4 times.