Steel sleeve press-fitting device for plastic parts and press-fitting method of device

Abstract

The invention provides a steel sleeve press-fitting device for plastic parts and a press-fitting method of the device. The press-fitting device comprises an upper pressing mechanism and an upper jacking mechanism matched with the upper pressing mechanism, wherein the upper pressing mechanism comprises a centering rod arranged in a shell body, the upper end of the centering rod is connected with anupper air cylinder, the lower end of the centering rod is sleeved with an upper pressing plate seat, a guide sleeve is arranged between the upper pressing plate seat and the centering rod, and an O-shaped ring is arranged between the guide sleeve and the centering rod; and the upper jacking mechanism comprises a lower jacking rod with a convex top, the lower jacking rod is connected with an air cylinder arranged below the lower jacking rod through a base, the bottom of the lower jacking rod is arranged in the base, the middle of the lower jacking rod is sleeved with a lower jacking rod fixingseat, and an O-shaped ring is arranged between the lower jacking rod fixing seat and the lower jacking rod. According to the device, it can be guaranteed that steel sleeves can be smoothly pressed inplace for products with a large deviation in hole positions of injection molded parts, so that the downtime caused by the failure of pressing the steel sleeves is reduced, and the equipment utilization rate is increased; and meanwhile, the qualified rate of the press-fitting products is high, and the quality requirement is met.

Description

technical field [0001] The invention relates to a steel sleeve press-fitting device for plastic parts and a press-fit method thereof. Background technique [0002] When assembling injection molded parts, usually in order to increase the strength of the assembly hole of the injection molded part, it is necessary to press-fit a steel sleeve in the hole after injection molding. The existing steel sleeve pressing device such as Figure 1-Figure 2 As shown, 3 sets of steel sleeves are placed on the head of the ejector rod 2, and the product 4 is placed on the product fixing plate 1 to ensure that the hole of the product is directly above the steel sleeve, the jig is lowered, and the upper pressing rod 6 is pressed down. Product 4, the cylinder connected to the bottom of the ejector rod moves the ejector rod upward to press the rod 6 until the ejector rod 2 protrudes from the steel sleeve 3 and presses it into the corresponding product hole. In general, since the lower base plate...

AI Technical Summary

Problems solved by technology

[0003] However, for some large-sized injection molded parts, due to the large amount of shrinkage and deformation after the product is injected, the position of the measurement hole will also deviate from the product, so the existing mechanism cannot ensure that the steel sleeve is accurately pressed into the hole

For example, a PP container with a length, width and height of 875mm*293mm*183mm has a large shrinkage deformation after injection molding, and the actual measurement hole position deviation is + / -1.5mm

The chamfer size of the product is 0.45, the chamfer size of the steel sleeve is 0.2, and the chamfer size is much smaller than the hole position deviation, so the existing mechanism cannot ensure that the steel sleeve is pressed into the hole

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