阅读说明：本技术 一种热塑性塑料包覆金属复合型材的生产装置 (Production device for thermoplastic plastic coated metal composite section ) 是由 钱雨生 罗奕兵 华熳煜 于 2019-11-22 设计创作，主要内容包括：一种热塑性塑料包覆金属复合型材的生产装置,其特征在于,被包覆金属为金属型材,金属型材的断面特征为圆形、矩形或其它非规则的实心或中空断面型材,生产工艺原理为：首先,将金属型材固定,复合成型模具置于金属型材的一端,使端面挡板、复合成型模具本体、金属型材的外轮廓形成热塑性塑料成型型腔；然后,将熔融态的热塑性塑料送入成型型腔中,待端面挡板处的热塑性塑料层冷却、初步固化成型后,复合成型模具本体在拉拔机构的带动下与端面挡板分离,从而,熔融态热塑性塑料在金属型材表面连续性的涂胶、定型、冷却固化,制成复合型材。(The production device of the thermoplastic plastic coated metal composite section is characterized in that the coated metal is a metal section, the section of the metal section is characterized by being a round, rectangular or other irregular solid or hollow section, and the production process principle is as follows: firstly, fixing a metal section, placing a composite forming die at one end of the metal section, and forming a thermoplastic plastic forming cavity by using the end face baffle, the composite forming die body and the outer contour of the metal section; and then, feeding the molten thermoplastic plastic into a forming cavity, and separating the composite forming die body from the end face baffle under the driving of a drawing mechanism after the thermoplastic plastic layer at the end face baffle is cooled and preliminarily solidified and formed, so that the molten thermoplastic plastic is continuously coated, shaped, cooled and solidified on the surface of the metal profile to prepare the composite profile.)

1. A production device for a thermoplastic plastic coated metal composite section is characterized in that the coated metal is a metal section, the section of the metal section is characterized by being round, rectangular or other irregular solid, similar to a groove-shaped non-closed hole section or a hollow section, the section specifications of the metal section and the composite section are required to be consistent in the length direction, and the thermoplastic layer is uniform or non-uniform in thickness on the coated section;

the production device of the thermoplastic plastic coated metal composite section comprises a resin conveying mechanism (18), a flexible heat preservation pipe (17), a composite forming die body (6), a drawing mechanism (19), a cooling water pipe (3), a sealing ring (8), a heat insulation layer (5) and the like; the composite forming die body (6) is of a combined structure and consists of six parts, namely a lead-in section (10), a sealing section (11), a gluing section (12), a pressurizing area (13) and a curing area (14) and a demoulding area (15); each part of the composite forming die body (6) can be manufactured independently and then connected and assembled into a whole, and also can be designed into a part by multiple parts and then combined and assembled into a whole;

the production process principle of the composite section bar is as follows: firstly, fixing a metal section, placing a composite forming die at one end of the metal section, and enabling an end face baffle, a composite forming die body and the metal section to form a thermoplastic forming cavity; and then, feeding the molten thermoplastic plastic into a molding cavity, and after the thermoplastic plastic layer close to the end baffle is preliminarily cured and molded, axially moving the composite molding die body after being separated from the end baffle under the driving of a drawing mechanism, so that the molten thermoplastic plastic is continuously coated, molded, cooled and cured on the surface of the metal profile to prepare the composite profile.

2. The leading-in section (10) of the composite forming die body (6) of claim 1 is of a variable cross-section structure, the size of the inner profile of the cross section of the leading-in section gradually increases along the drawing direction (21), a certain gap is left between the die body of the sealing section (11) and the surface of the metal section (16), and the sealing problem is solved by assembling sealing rings (8) with different stages on the periphery of the sealing section (11); a resin conveying channel (7) is processed in the leading-in section (10), the sealing section (11) and the gluing section (12) of the composite forming die body (6), and an outlet of the resin conveying channel (2) is positioned in the gluing section (12) of the composite forming die body.

3. The pressing zone (13) according to claim 1, having a variable cross-section so that a wedge-shaped structure is formed between the inner surface of the pressing zone and the surface of the metal profile, the reduction of the wedge-shaped cross-section being in the same direction as the drawing direction.

4. The composite forming die body gluing section (12) as set forth in claim 1, wherein the middle part of the composite forming die body gluing section adopts a thin-walled groove-shaped structure, and the heat insulation layer is tightly attached to the groove-shaped groove part and completely covers the groove-shaped structure to all exposed parts of the die body on the end face of the leading-in section (10).

5. The end face baffle (1) of claim 1 is sealed with the outer contour of the demoulding area (15) by clearance fit or sealing rings, the end face baffle (1) is sealed with the end face of the metal section bar (16) by flexible pads or elastic pads, and the end face baffle (1) is mechanically and fixedly connected with the locking/releasing device (2).

6. The lock/release device (2) as claimed in claim 1, wherein the body is an electromagnet which attracts the end of the release area (15) when it is energized, and has an automatic timing power-off function.

Technical Field

The invention relates to production equipment of a plastic/metal composite material, in particular to a production device of a thermoplastic plastic coated metal composite section.

Background

The metal/plastic composite section such as steel-plastic composite pipe, aluminium-plastic composite pipe, etc. has strong corrosion resistance, and simultaneously has the advantages of high strength, rigidity, pressure resistance, temperature resistance, etc. of the metal or alloy pipe, and can not produce leakage and leakage phenomena due to corrosion problems, thereby reducing the occurrence of pollution and safety production accidents, saving investment and maintenance cost, and being widely applied to the industries of chemical industry, medicine, food, etc. The existing manufacturing method of metal section bar coated plastic mainly adopts the modes of preheating internal installation, internal coating leveling treatment or hot melt adhesive (Shenyong, etc. method and equipment for coating plastic film on the internal and external surfaces and end surfaces of metal tube, Chinese invention patent application No. 200910181057.5, 2009-10-27), but the method has complex process, low size precision of plastic layer, is not suitable for continuous production and has low production efficiency.

Disclosure of Invention

The production device of the thermoplastic plastic coated metal composite section is characterized in that the coated metal is a metal section, and the section specifications of the metal section and the coated composite section are consistent in the length direction. The production process principle of the composite section comprises the following steps: firstly, fixing a metal section, placing a composite forming die at one end of the metal section, and enabling an end face baffle, a composite forming die body and the metal section to form a thermoplastic forming cavity; and then, sending the molten thermoplastic plastics into a forming cavity by a resin conveying mechanism through a flexible heat-insulating pipe, after the thermoplastic plastics layer close to the end baffle is cooled and preliminarily solidified and formed, separating the composite forming die body from the end baffle under the driving of a drawing mechanism, and axially moving the composite forming die body on the surface of the metal section, so that the molten thermoplastic plastics are continuously coated, shaped, cooled and solidified on the surface of the metal section to prepare the composite section.

The invention provides a production device of a thermoplastic plastic coated metal composite section, which comprises the following components: the device comprises a resin conveying mechanism (18), a flexible heat-insulating pipe (17), a composite forming die body (6), a drawing mechanism (19), a cooling water pipe (3), a sealing ring (8), a heat-insulating layer (5) and the like; the device is characterized in that the device can be applied to the section characteristics of metal sections, such as round, rectangular or other irregular solid, non-closed hole sections similar to groove shapes or hollow sections, and the thickness of the thermoplastic layer of the composite section with the same cross section can be uniform or non-uniform; the composite forming die body (6) is of a combined structure and consists of six parts, namely a leading-in section (10), a sealing section (11), a gluing section (12), a pressurizing area (13) and a curing area (14) and a demoulding area (15). Each part of the composite forming die body (6) can be manufactured independently and then connected and assembled into a whole, and also can be designed into a part by multiple parts and then combined and assembled into a whole.

The drawing mechanism (19) is mainly used for providing power for the composite forming die body (6) to move in the surface of the metal section (16) along the axial direction; the composite forming die body (6) is of a combined structure, the leading-in section (10) of the composite forming die body (6) is of a variable cross-section structure, the size of the inner outline of the cross section of the composite forming die body is gradually increased along the drawing direction (21), the composite forming die body (6) can conveniently move on the surface of a metal section (16), the phenomenon that the composite forming die body (6) is clamped on the surface of the metal section (16) due to the eccentricity of drawing force and the like can be prevented, a certain gap is reserved between the die body of the sealing section (11) and the surface of the metal section (16), the sealing problem is solved by assembling a sealing ring (8) with an indefinite number on the periphery of the sealing section (11), the number of the sealing ring (8) is determined by the resin pressure required by the gluing section, meanwhile, the requirement on the size precision of the outer surface of the metal section (16) can be properly reduced due to the elastic deformation of the sealing ring (8), and the requirement of the device, the axial movement of the composite forming die body (6) on the surface of the metal section is facilitated; a resin conveying channel (7) is processed in a leading-in section (10), a sealing section (11) and a gluing section (12) of the composite forming die body (6), an inlet of the resin conveying channel (7) is connected with a flexible heat insulation pipe (17), an outlet of the resin conveying channel (2) is positioned in the gluing section (12) of the composite forming die body, and a resin conveying mechanism (18) conveys molten thermoplastic plastics into a thermoplastic plastic forming cavity (9) through the flexible heat insulation pipe (17) and the resin conveying channel (7).

The inner section of the pressurizing area (13) is of a variable section structure, the section size of the pressurizing area is gradually increased along the drawing direction (11), so that a wedge-shaped structure is formed between the inner surface of the pressurizing area and the surface of the metal section, the reduction direction of the wedge-shaped section is the same as the drawing direction, the pressurizing and strong cooling solidification shaping of the thermoplastic layer is realized under the conditions of forced cooling of cooling water and movement of a die, the compactness of the thermoplastic layer (20) is improved, and the comprehensive performance of the composite section is improved.

The curing area (14) is of an equal section structure, so that the accuracy of the size of the outer surface of the thermoplastic plastic layer (20) is ensured; the demoulding section (15) is of a variable cross-section structure, the cross-sectional size of the inner outline of the demoulding section is gradually reduced along the drawing direction, and the mould is conveniently separated from the thermoplastic layer (1).

The middle part of the gluing section (12) of the composite forming die body adopts a thin-wall groove-shaped structure so as to reduce the heat dissipation intensity of the die metal passing through the direction of the resin conveying channel → the groove-shaped structure → the curing area; meanwhile, the heat insulation layer is tightly attached to the groove-shaped structure of the gluing section and covers the groove-shaped structure to all exposed parts of the end face of the leading-in section (10) of the composite forming die body (6), so that the flowability of resin in the resin conveying channel (7) is ensured as much as possible.

When the composite forming die body (6) is positioned at the beginning end of a metal section (16), the end face baffle (1) can seal the end part of a thermosetting plastic forming cavity, the end face baffle (1) and the outline of a demoulding area (15) are sealed in a clearance fit mode or a sealing ring mode, the end face baffle (1) and the end face of the metal section (16) are sealed in a flexible pad mode or an elastic pad mode, the end face baffle (1) is locked and separated by the locking/separating device (2), the end face baffle (1) and the locking/separating device (2) are in a mechanical fixed connection mode, the locking/separating device (2) is provided with an electromagnet as a main body and has a timing automatic power-off function, the electromagnet can attract the end part of the demoulding area (15) when the electromagnet is powered on, the electromagnet is powered off when the electromagnet is separated, and the end face baffle (1) and the locking/separating device (2) automatically form the composite forming die body (6) under the drawing action of a mechanism The release zone (15) is separated, and the power-on time and the locking force of the release zone depend on the length of the curing zone, the curing temperature and the material properties of the thermosetting resin.

The invention has the advantages that:

(1) the invention can be suitable for composite section bars prepared by metal section bars such as round tubes, square tubes, special-shaped tubes and the like by replacing the design of the die;

(2) the coating layer of the cross section of the produced composite section can be uniform-thickness, and the composite section with non-uniform-thickness specification can be easily produced;

(3) because the composite forming die is adopted, the surface smoothness and the size precision of the composite section are high;

(4) because the cooling and shaping section of the composite forming die adopts a variable cross-section structure, the pressure adjustment during the cooling and solidification of the resin can be realized by adjusting the size gradient of the variable cross-section structure, so that the compactness of a resin layer is ensured, and the comprehensive performance of the coated composite section is improved;

(5) the device can realize one-step completion of gluing, curing and composite molding, and has higher production efficiency and lower cost compared with methods such as preheating internal installation, internal coating leveling treatment or hot melt adhesive and the like;

(6) the sealing device realizes sealing by utilizing the elastic deformation of the sealing ring, and can reduce the requirement on the surface size precision of the metal section, thereby saving the production cost of the metal section and further reducing the production cost of the composite section;

(7) by adding second phase powder, short fiber and the like into the resin, the device can also be used for producing metal section coated resin matrix composite section.

The invention will be further described with reference to the accompanying drawings in which:

FIG. 1 is a schematic structural view of a composite forming mold according to the present invention. (1) The end face baffle is made of structural materials such as steel, aluminum alloy and the like, the end face baffle (1) and a demoulding area of the composite forming mould body (6) are sealed in the form of clearance fit or a sealing ring and the like, and the end face baffle (1) and the end face of the metal section are sealed in the form of a felt or a high-elasticity material, a gasket and the like. (2) For the locking/releasing device, the main body adopts a plurality of or integral electromagnets annularly arranged at the periphery of the end face baffle, and the connection structure of the electromagnets fixed between the end face baffles (1) is made of metal; the locking/releasing device (2) is provided with a timing automatic power-off function. (3) The cooling water pipe is in the form of a flexible pipe such as a rubber pipe and a rubber hose; (4) the cooling water channel is of a circular cross-section structure; (5) the heat insulating layer is made of heat insulating materials such as superfine glass wool, high silicon-oxygen cotton and the like; (6) the composite forming die body is made of metal; (7) the cross section structure of the resin conveying channel is circular; (8) the sealing ring is made of rubber, silica gel and other materials; (9) molding a cavity for the thermosetting plastic layer; (10) the leading-in section is made of metal materials such as steel, aluminum alloy and the like; (11) the sealing section is made of metal materials such as steel, aluminum alloy and the like; (12) the glue coating section is made of metal materials such as steel, aluminum alloy and the like; (13) the pressurizing area is made of materials such as steel, aluminum alloy, copper alloy and the like; (14) the solidification zone is made of materials such as steel, aluminum alloy, copper alloy and the like; (15) the demoulding area is made of steel materials; (16) is a coated metal section bar; (21) is the drawing direction.

FIG. 2 is a schematic diagram of the apparatus of the present invention. (17) The heat insulation pipe is a flexible heat insulation pipe, the flexible heat insulation pipe is of a composite structure, the inner layer is a bearing layer and is made of metal, and the outer layer is a heat insulation layer and is coated by heat insulation materials; (18) a resin conveying mechanism adopts an injection molding machine mode; (19) for the drawing mechanism, a chain type, a hydraulic drawing machine or other mechanisms capable of providing linear reciprocating power are adopted; (20) is a compounded thermoplastic plastic layer; (3) (5), (6), (8), and (21), the specific structure is explained with reference to fig. 1.

The specific implementation mode is as follows:

the invention is further illustrated by the following examples:

the inventive device is configured as shown in fig. 1. The metal section is a steel pipe with the diameter of 25mm, and the metal section (19) is a drawing mechanism and adopts a chain type drawing machine; (6) the composite forming die is a composite forming die body and is made of steel, the leading-in section adopts a conical structure, the sealing ring adopts an O-shaped rubber ring, and the thickness of the thin-wall groove-shaped structure of the gluing section is 3 mm; the end face baffle (1) is made of steel, the end face baffle is in clearance fit with the demolding area in a sealing mode, and the end face baffle and the metal section are sealed in a felt mode; (3) the cooling water pipe is connected with the cooling water channel in a threaded connection mode, and the material of the water pipe is in a rubber pipe form; (5) the heat insulation layer is made of heat insulation cotton; the magnets of the locking/releasing device (2) adopt six rectangular electromagnets, and the electromagnets are fixed mechanically; (18) a resin pump form is adopted for the resin conveying mechanism; (17) the flexible heat preservation pipe is wrapped by the heat insulation cotton, and the two ends of the flexible heat preservation pipe are connected in a threaded connection mode.