CN-121625416-B - Plastic hose forming device

CN121625416BCN 121625416 BCN121625416 BCN 121625416BCN-121625416-B

Abstract

The invention relates to the field of extrusion processes, and discloses a plastic hose forming device which comprises an extrusion mechanism, a machine head mouth die, a shaping mechanism and a suspension pressure control mechanism which are sequentially connected in series, wherein the output end of the machine head mouth die is connected with the input end of the shaping mechanism through a heat insulation sheath, the suspension pressure control mechanism comprises a suspension base and a plug body suspended in the extrusion hose, the diameter of the plug body is smaller than the inner diameter of the extrusion hose, gaps are reserved in the circumferential direction, one section of the extrusion hose in the shaping mechanism is blocked by the machine head mouth die and the plug body to form a dynamic pressurizing section, and an air pressure output port is arranged at the center of the output end of the machine head mouth die and outputs air pressure to the dynamic pressurizing section. The pressure of the dynamic pressurizing section in the shaping mechanism is kept stable dynamically by continuously supplying air and pressurizing. When the outer layer material of the multi-layer hose is adsorbed, the inner layer is pushed outwards by pressure, so that the compaction state among the layers is maintained, the molecular diffusion is promoted, and the interlayer binding force is improved.

Inventors

LIU BO
Guan Yepei
WAN HENG

Assignees

广州市鸿志包装材料有限公司
广州市鸿志塑胶软管有限公司

Dates

Publication Date: 20260505
Application Date: 20260205

Claims (3)

1. The plastic hose forming device is characterized by comprising an extrusion mechanism, a machine head mouth die, a shaping mechanism and a suspension pressure control mechanism which are sequentially connected in series, wherein the output end of the machine head mouth die is connected with the input end of the shaping device through a heat insulation sheath, the suspension pressure control mechanism comprises a suspension base and a plug body suspended in the extrusion hose, the diameter of the plug body is smaller than the inner diameter of the extrusion hose, gaps are reserved in the circumferential direction, the plug body is not contacted with the inner wall of the extrusion hose, one section of the extrusion hose positioned in the shaping mechanism is blocked by the machine head mouth die and the plug body to form a dynamic pressurizing section, and an air pressure output port is arranged at the center of the output end of the machine head mouth die and outputs air pressure to the dynamic pressurizing section; Wherein the extrusion mechanism is a single extruder or a multi-extruder parallel co-extrusion structure; The suspension base comprises horizontal electromagnetic assemblies and vertical electromagnetic assemblies, wherein the horizontal electromagnetic assemblies are horizontally and symmetrically arranged on two sides of the plug body, the magnetic poles are correspondingly identical, and the horizontal transverse gap of the plug body is adjusted by controlling the power of the electromagnet; the suspension base also comprises a voltage stabilizing coil which is arranged around the extrusion hose, and the voltage stabilizing coil is controlled by a servo power supply to supply power and is used for balancing the pushing force of the dynamic pressurizing section pressure to the plug body; the air pressure output port is connected with a servo air pump and is used for precisely controlling the air pressure of the dynamic pressurizing section; the control terminal is respectively connected with the servo air pump, the horizontal electromagnetic component, the vertical electromagnetic component and the servo power supply of the voltage stabilizing coil in a communication way and is used for cooperatively controlling the gravity balance of the plug body and the front and back stress of the plug body in the air pressure flow change process of the dynamic pressurizing section; the plug body is in a shuttle shape so as to reduce the influence of turbulence; The inside of the machine head die is divided by a feeding block to form feeding flow passages matched with the quantity of the extruders, and the flow passages are layered and converged at the output end.
2. The apparatus of claim 1, further comprising an ultrasonic sensor communicatively coupled to the control terminal, wherein the ultrasonic sensor is configured to monitor a gap distance between the stopper body and the extruded hose, and wherein ultrasonic waves of the ultrasonic sensor are further configured to perturb an interlayer melt interface to promote molecular diffusion.
3. The apparatus of claim 1, further comprising a cooling mechanism and a cutting mechanism connected to the suspension pressure control mechanism, wherein the cooling mechanism is used for cooling the extruded hose, and the cutting mechanism is used for cutting the extruded hose according to a required length.

Description

Plastic hose forming device Technical Field The invention relates to the field of extrusion processes, in particular to a plastic hose forming device. Background Flexible pipes, i.e. flexible pipes, are widely used in many fields such as gas, liquid, circuit packaging, etc. due to their flexibility, pressure resistance, temperature resistance, corrosion resistance, etc. According to different purposes of the hose, the material requirements of the hose are obviously different, wherein the condition that different materials of the wall of the multilayer hose are needed is caused, at the moment, a production process of multi-machine co-extrusion is needed, a plurality of materials are respectively melted by different extruders and then are gathered into the same machine head die, layering runners are arranged in the machine head die to ensure that all layers of melt meet and are co-extruded in the optimal rheological state, and in the shaping and cooling processes, the melt molecular diffusion is used for forming a mutual-permeation structure to strengthen the binding force. However, under the condition that the binding force between the layers of materials of the multi-layer hose required by special working conditions is weak, the vacuum shaping device adsorbs the outer layer pipe wall materials through negative pressure, so that the weak interlayer binding force is more easily pulled and separated, and the interlayer connection is unstable. How to actively provide external pressure to improve interlayer bonding force of the multi-layer hose under the condition of weak bonding force of materials so as to optimize product quality is an important problem to be solved. Disclosure of Invention The invention aims to provide a device which is used for properly increasing the internal pressure in the interval from the extrusion port of a hose to a vacuum shaping device, so that each layer is tightly pressed from inside to outside, the molecular diffusion efficiency is improved, and the interlayer binding force is enhanced. The specific technical scheme is as follows: The plastic hose forming device comprises an extruding mechanism, a machine head mouth die, a shaping mechanism and a suspension pressure control mechanism which are sequentially connected in series, wherein the output end of the machine head mouth die is connected with the input end of the shaping device through a heat insulation sheath, the suspension pressure control mechanism comprises a suspension base and a plug body suspended in the extruding hose, the diameter of the plug body is smaller than the inner diameter of the extruding hose, gaps are reserved in the circumferential direction, one section of the extruding hose in the shaping mechanism is blocked by the machine head mouth die and the plug body to form a dynamic pressurizing section, and an air pressure output port is arranged in the center of the output end of the machine head mouth die to output air pressure to the dynamic pressurizing section. Preferably, the extrusion mechanism is a single extruder or a multi-extruder co-extrusion structure. The suspension base comprises horizontal electromagnetic assemblies and vertical electromagnetic assemblies, wherein the horizontal electromagnetic assemblies are horizontally and symmetrically arranged on two sides of the plug body, the magnetic poles are correspondingly identical, the horizontal transverse gap of the plug body is adjusted by controlling the power of the electromagnet, the vertical electromagnetic assemblies are longitudinally and symmetrically arranged on the upper and lower sides of the plug body, the magnetic poles below the vertical electromagnetic assemblies are correspondingly identical, and the magnetic poles above the vertical electromagnetic assemblies are mutually exclusive so as to balance the weight of the plug body and keep suspension. Preferably, the suspension base further comprises a voltage stabilizing coil arranged around the extrusion hose, and the voltage stabilizing coil is powered by a servo power supply in a controlled manner and used for balancing the pushing force of the dynamic pressurizing section pressure on the plug body. Preferably, the air pressure output port is connected with a servo air pump for precisely controlling the air pressure of the dynamic pressurizing section. Preferably, the plug further comprises a control terminal which is respectively in communication connection with the servo air pump, the horizontal electromagnetic component, the vertical electromagnetic component and the servo power supply of the voltage stabilizing coil and is used for cooperatively controlling the gravity balance of the plug body and the front and back stress of the plug body in the air pressure flow change process of the dynamic pressurizing section. Preferably, the device further comprises an ultrasonic sensor in communication connection with the control terminal, wherein the ultrasonic sensor is used for moni