Linkage production method and device for rubber hose extrusion

Abstract

The present invention relates to a linkage production method and a device for rubber hose extrusion. The device includes a soft core guiding device, a front traction machine, a cold feed extruder, a power counter, a temperature control system, a diameter gauge, a printer, a cooling water device, a rear traction machine, a separant coating machine, a double-shaft winding machine, a main console and a tension adjusting device. The extruder is provided with multiple groups of cylinder heaters, temperature detectors and pressure sensors. A control system of the extruder is composed of a frequency converter, a PLC, a hose length detection rotary encoder and a hose wall thickness tester; and the control system of the extruder has the following functions: manual and automatic conversion; selection, identification and input of set reference value; automatic tracking and adjustment on traction speed according to thickness deviation of the hose wall; display and set of the wall thickness of the hose; display of the current and speed of the traction machine; protection, alarm and self fault diagnosis mechanical and electrical components for overcurrent, overvoltage, traction claw slip, broken chain traction and broken shaft traction. The technical scheme disclosed by the invention has the characteristics of high automation degree and convenience for operation and use, etc.

Description

technical field [0001] The invention relates to a rubber hose extrusion technology, in particular to a rubber hose cold feed extrusion linkage production line. Background technique [0002] 1. Extrusion equipment [0003] Extrusion is a very important process in the rubber hose manufacturing process. After the rubber material is plasticized, mixed and extruded through the corresponding die through the extruder, the tube blank of the corresponding specification can be obtained. Extruders are divided into hot-feed extruders and cold-feed extruders according to different feeding methods. At present, most domestic rubber hose manufacturers use hot-feed extruders of different specifications to extrude the tube embryos, and only a few manufacturers use cold-feed extruders to extrude the tube embryos. To extrude the rubber tube embryo with hot feed material, it must be equipped with a rubber mixing machine to refine the rubber material, and the rubber material must be heated even...

AI Technical Summary

Problems solved by technology

[0008] (1) The size of the tube embryo does not meet the standard requirements, and the thickness of the tube wall is uneven: improper selection of the core shape and the mouth shape, poor mixing and mastication of the rubber material, resulting in inconsistent plasticity of the rubber material; eccentricity of the core shape and the mouth shape Or improper selection, uneven heating temperature of the rubber material, poor plasticizing performance of the working screw of the extruder, all of which are likely to cause such problems

[0009] (2) The thickness of the tube blank is uneven: the plasticity of the rubber material is inconsistent, the heating temperature is uneven, the feeding speed is fast and slow, the extrusion speed and the traction speed do not match, all of which can cause the outer diameter of the tube blank to be extruded. Inhomogeneity

[0010] (3) Rupture of the rubber layer: impurities such as micelles and hard particles mixed in the rubber material, or local self-sulfurization of the rubber material may cause the rubber layer to rupture

[0011] (4) Blistering or sponge phenomenon in the rubber layer: too much water or low-molecular volatiles in the rubber material, air mixed in the rubber material or feeding, the temperature of the extruder is too high, and the screw of the extruder is severely worn and causes thrust Insufficient pressure, insufficient pressure on the head of the extruder, etc., can cause foaming or sponge phenomenon in the rubber layer

[0012] (5) Preform adhesion: Preform cooling is not enough, the effect of the release agent is poor, the preform is squeezed too tightly after extrusion, and the parking time is too long, all of which can cause preform adhesion.

[0014] At present, the traction guide device and the electrical control system can realize the synchronous control of winding and traction through frequency conversion control, but there is not much consideration in the coordination and cooperation with the extrusion link, and they are still in a state of independent operation, and cannot be linked from the entire steel wire winding Full automatic control and operation from the perspective of production

Moreover, the closed-loop feedback control from the overall link of hose extrusion, vulcanization freezing, steel wire winding and traction has not been realized.

For abnormal production conditions, technical research and equipment development of fault diagnosis, monitoring and alarming have not been reported in the literature.

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