Information channel monitor body injection mold
The main product of the information channel monitor is shown in Figure 1. The maximum size of the product is 168.00 mm x 121.70mm x 62.35 mm, the average thickness of the plastic part is 1.70 mm, the material of the plastic part is PC, the shrinkage rate is 1.004, and the quality of the plastic part is 133.08 grams. . The technical requirements for plastic parts are that there must be no defects such as peaks, dissatisfaction with injection molding, flow lines, pores, warpage deformation, silver lines, cold materials, jet lines, etc.
It can be seen from Figure 1 that the plastic part is a rectangular box with a relatively large height. The two large sides are parallel to each other. One of the large sides has a 0.2-deep sinking partial sinking plane, which is used to affix the trademark. The top corners of the two large surfaces each have a rotating shaft, which is used to assemble the end cover and act as a hinge shaft. The coaxiality is required to be ø0.05. In summary, the two large surfaces must be designed with large sliding blocks. The two outer and two end surfaces have different shapes, and there are various square holes and round holes on the surface, and it is also necessary to design a large-scale slider to pull the core as a whole. There are multiple hollow windows and small holes on the top of the plastic part, which affect the flow of the plastic during injection molding.
The size of the plastic part is large, and the four-sided slider core pulls, which determines the mold design cavity ranking as 1 out of 1. The mold design drawing is shown in Figure 2. The mold base is the standard mold base DCI4045, the size of the slider is larger, the shovel chooses the original body, and all the four large sliders higher than the parting surface are wrapped in the A plate. This type of plastic part has a large side glue area. Under the action of injection pressure, the sliding block of the mold has a great tendency to separate to four sides. The shovel is required to be strong enough and extremely powerful. Therefore, it is necessary to select the mold when designing the mold. The embryo has sufficient strength.
Since the plastic parts are wrapped with large sliding blocks on four sides, the design of the gating system must be glued from the top surface. Therefore, a three-plate mold was designed according to the needs, and the gating system used a small nozzle to a large nozzle to inject glue from multiple window edge side gates on the top surface of the plastic part. The gate is 4 points. The top surface of the plastic part has multiple buttons, indicator lights, and LED screen display windows, which need to be flat. Therefore, the thickness of the side gate needs to be lower than the plastic position of the plastic part to facilitate trimming.
All four sliding blocks are driven by inclined guide posts, and the inclined and bottom surfaces of the sliding blocks are all inlaid with wear plates. Wear-resistant plates are generally made of oil steel 2510, after heat treatment, the hardness is HRC56. The surface of the wear-resistant plate needs to be processed with oil grooves. The oil grooves have two types of intersecting lines composed of diamonds and intersecting circles. The depth of the oil groove is 0.8, no matter what kind of structure the oil groove is, do not break to the edge when processing, that is, leave a certain distance between the pattern and the four sides of the wear plate. The purpose of this is that in actual use, the oil stains generated by the movement and wear of the slider will not escape, so that the product will not be contaminated.
The height of the plastic part is very large, and the plastic part has a great tightening force on the movable mold during injection molding. For plastic parts of this type of structure, it is not feasible to simply use a thimble to eject it. Because the ejection stroke is large, the plastic part is sleeved on the ejector pin when ejecting, and it is difficult to take it out. Larger ejection force often causes whitening of plastic parts. For this reason, push blocks are designed on the edge of the long side of the plastic part, and two push blocks are designed on each long side. The main ejector element of this set of molds is a push block, supplemented by a small amount of ejector pins.
The auxiliary device of the mold plays a great role in the normal operation of the mold. The lock module is an indispensable accessory for mold hoisting and transportation. The lock module of the three-plate mold needs to be lengthened to lock each template that may be separated. The lock module must be painted with red paint to remind the operator to remove it before opening the mold. The mold foot is an auxiliary component that protects the mold from touching the ground. It depends on the height of the components exposed on the surface of the mold such as the water nozzle at the bottom of the mold. When there are components such as an oil cylinder at the bottom of the mold, the mold feet need to be heightened. The ejector rod in the K.O hole can protect the ejector plate from deformation, reduce the ejection stroke, and shorten the injection cycle.
ABIS MOLD TECHNOLOGY CO.,LTD
Daisy Wang (Sales Engineering)
M: +86-150 1652 6799
E: daisy@abismold.com
A: Building B#,YingKeli Industrial Part, LongDong Community, LongGang District, Shenzhen, China 518116
WhatsApp: +86 136 8261 9739
Skype: daisymold@outlook.com