阅读说明：本技术 一种金属包覆热固性塑料型材的生产设备 (production equipment for metal-coated thermosetting plastic profiles ) 是由 张�浩 罗奕兵 华熳煜 汤斌 肖峰 刘潇 于 2019-08-13 设计创作，主要内容包括：金属包覆热固性塑料型材的生产设备工艺原理特征为：首先,将金属型材固定,复合模具置于金属型材的一端,使端面挡板、复合模具、金属型材内表面轮廓组成热固性塑料层成型型腔；然后,将添加了固化剂、添加剂等的热固性树脂采用树脂传送机构通过柔性管和树脂传送通道,送入热固性塑料成型型腔中,待端面挡板处热固性塑料层经初步固化成型后,在拉拔机构的带动下,复合模具与端面挡板分离,从而在金属型材内表面依次实现涂胶、成型、加热初步固化,制成复合型材。可应用于直通型金属型材包覆热固性塑料的生产。(The production equipment and process principle of the metal-coated thermosetting plastic profile are characterized in that: firstly, fixing a metal section, placing a composite die at one end of the metal section, and enabling the end face baffle, the composite die and the inner surface profile of the metal section to form a thermosetting plastic layer molding cavity; then, the thermosetting resin added with curing agent, additive and the like is sent into a thermosetting plastic molding cavity by a resin conveying mechanism through a flexible pipe and a resin conveying channel, after the thermosetting plastic layer at the end face baffle plate is subjected to primary curing molding, the composite mold is separated from the end face baffle plate under the driving of a drawing mechanism, so that the inner surface of the metal section is sequentially subjected to gluing, molding and heating primary curing, and the composite section is prepared. Can be applied to the production of the thermosetting plastic coated by the straight-through metal section.)

1. The production equipment of the metal-coated thermosetting plastic profile consists of a drawing mechanism (18), a composite die (16), a resin conveying mechanism (19), a flexible pipe (4), a heating and curing part (15), a sealing ring (3), an end face baffle (7), a fixer (6) and a locking/releasing device (8); the device is characterized in that the equipment is applied to the production of the through type metal section bar coated with thermosetting plastic, the section of the metal section bar is characterized by a closed hollow section bar with a round, rectangular or other irregular section, the section structure of the metal and the produced section bar is kept unchanged in the axial direction of the section bar, and the thickness of the thermosetting plastic layer is determined by the structure of the mould.

2. The production process of the composite section is characterized in that: firstly, fixing a metal section, placing a composite die at one end of the metal section, and enabling the end face baffle, the composite die and the inner surface profile of the metal section to form a thermosetting plastic layer molding cavity; then, the thermosetting resin added with the curing agent, the additive and the like is sent into a thermosetting plastic molding cavity by a resin conveying mechanism through a flexible pipe and a resin conveying channel, after the thermosetting plastic in the molding cavity is primarily cured and molded, the composite mold is separated from the end face baffle under the driving of a drawing mechanism, so that the primary curing of gluing, molding and heating is sequentially realized on the inner surface of the metal section, and the composite section is manufactured.

3. The locking/unlocking device (8) of claim 1, which is divided into two parts, namely an inner hole of the composite section and an outer periphery of the metal section; the main body of the locking/releasing device (8) is an electromagnet, when the electromagnet is electrified, the electromagnet is attracted with the end part of the demoulding area (9) positioned in the inner hole of the composite section and the fixer (6) positioned at the periphery of the metal section, when the electromagnet is separated, the electromagnet is powered off, under the action of the drawing mechanism, the end face baffle (2) and the locking/releasing device (8) are automatically separated from the composite forming die (16), and the electrifying time and the locking force of the locking/releasing device depend on the length of the curing area, the curing temperature and the material performance of thermosetting resin.

4. the composite mould of claim 1, consisting of six parts, a positioning section (14), a sealing section (13), a forming section (12), a heat insulation section (11), a curing section (10) and a demoulding area (9); each section is processed and assembled in a single section mode, or a plurality of sections are combined in a combined mode.

5. The end face baffle (7) of claim 1 can close the end of the thermosetting plastic molding cavity, the sealing between the end face baffle (2) and the end face contour of the demolding area (9) is realized by clearance fit or a sealing ring, the sealing between the end face baffle (7) and the end face of the metal section bar (1) is realized by a flexible pad or an elastic pad, the locking and the separation between the end face baffle (7) and the metal section bar are realized by a locking/separating device (8), and the end face baffle (7) and the locking/separating device (8) are connected in a mechanical fixed mode.

6. The positioning section (14) of the composite die (16) according to claim 5 is of variable cross-section structure, the outer contour dimension of the cross section of the positioning section is gradually increased along the drawing direction; the positioning section is provided with resin conveying channels which are parallel to the axial direction of the metal section, and when the positions and the number of the resin conveying channels are arranged, the resultant force action point of the resin acting on the composite die (16) is the same as the centroid of the cross section of the metal section (1).

7. A sealing section (11) of a composite mould (16) according to claim 5, the inner contour of which is spaced from the inner surface of the metal profile (1), the sealing during the thermosetting resin moulding being effected by elastic deformation of the sealing section (11) provided with a sealing ring (3) of indefinite number.

8. The composite mould (16) as claimed in claim 5, wherein the insulating section (11) is of a thin-walled metal structure, and the insulating mat (5) is tightly connected with the inner surface of the thin-walled metal structure.

9. the composite die (16) according to claim 5, wherein the inner surface of the solidification zone (10) is closely connected with the heating and solidifying part (15), the solidification zone has a variable cross-section structure, a wedge-shaped structure is formed between the outer surface of the section connected with the heat insulation zone and the surface of the metal section, and the opening of the wedge-shaped structure is the same as the drawing direction (17).

10. The composite die (16) according to claim 5, wherein the demolding region (9) has a variable cross-section structure, and the outer contour dimension of the cross section of the composite die is gradually reduced along the drawing direction.

Technical Field

The invention relates to production equipment of a plastic/metal composite material, in particular to production equipment of a metal-coated thermosetting plastic profile.

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 invention provides a production device of a metal-coated thermosetting plastic section, which is characterized in that the device is applied to the production of a straight-through type metal section coated thermosetting plastic, the section characteristic of the metal section is a closed hollow structure with a circular, rectangular or other irregular section, the section structure of the metal and the produced section is kept unchanged in the axial direction of the section, and the thickness characteristic of the thermosetting plastic layer is determined by the structure of a mould.

the production equipment of the metal-coated thermosetting plastic profile comprises a drawing mechanism (18), a composite die (16), a resin conveying mechanism (19), a flexible pipe (4), a heating and curing part (15), a sealing ring (3), an end face baffle (7), a fixer (6), a locking/releasing device (8) and the like.

The production process principle of the composite section comprises the following steps: firstly, fixing the metal section bar, placing the composite mould at one end of the metal section bar, and making the end face baffle, the composite mould and the inner surface profile of the metal section bar form a thermosetting plastic layer molding cavity. Then, the thermosetting resin added with the curing agent and the additive is sent into a thermosetting plastic molding cavity by a resin conveying mechanism through a flexible pipe and a resin conveying channel, after the thermosetting plastic layer at the end face baffle plate is subjected to primary curing molding of the thermosetting plastic in the molding cavity under the action of heating and curing, the composite mold is separated from the end face baffle plate under the driving of a drawing mechanism, so that the axial movement of the composite mold is realized in the metal profile cavity, and the primary curing of gluing, molding and heating is sequentially realized on the inner surface of the metal profile to prepare the composite profile.

The drawing mechanism (18) is mainly used for providing power for the movement of the composite die (16) in the cavity of the metal section bar (1) along the drawing direction (17); the heating and curing part (15) provides heating for curing the thermosetting plastic, the heating and curing part (15) is tightly attached to the inner wall of the curing section (16) of the composite die, a detachable connection mode is adopted between the heating and curing part and the inner wall, the heating of the heating and curing part (15) adopts forms of resistance wires and the like, and a thermocouple temperature control mode is adopted for controlling the curing temperature; a resin conveying channel (2) is processed in the composite die (16), the inlet of the resin conveying channel (2) is connected with the flexible pipe (4), the outlet of the resin conveying channel (2) is positioned at a forming section (12) of the composite die (16), and a resin conveying mechanism (19) conveys thermosetting resin into a thermosetting plastic layer forming cavity (21) formed by the composite die (16) and the outer surface of the metal section bar (1) through the flexible pipe (4) and the resin conveying channel (2).

The composite die consists of six parts, namely a positioning section (14), a sealing section (13), a forming section (12), a heat insulation section (11), a curing section (10) and a demoulding area (9); the positioning section (14) of the composite die (16) is of a variable cross-section structure, the size of the outer contour of the cross section of the composite die is gradually increased along the drawing direction, so that the composite die (16) can be conveniently guided into and moved in a cavity of the metal section (1), and the phenomena of clamping and the like caused by eccentricity when the composite die moves in the axial direction of the metal section (1) are prevented; the positioning section is provided with resin conveying channels which are parallel to the axial direction of the metal section, and when the positions and the number of the resin conveying channels are arranged, the resultant force action point of the resin acting on the composite die (16) is the same as the centroid of the cross section of the metal section (1). A gap is reserved between the inner contour of the sealing section (11) of the composite die (16) and the inner surface of the metal section (1), sealing during thermosetting resin molding is realized by elastic deformation of the sealing section (11) assembled with the sealing rings (3) in variable stages, and by adopting the technology, the precision requirement on the inner contour size of the metal section (1) and the production cost can be properly reduced, so that the cost performance of the technology is improved. Processing has resin transfer passage (2) in shaping section (12), and this section resin transfer passage (2) and location section (14) resin transfer passage (2) UNICOM and mutually perpendicular, and heat insulating section (11) take metal thin wall structure, and heat insulating mattress (5) closely link to each other with the internal surface of this section thin wall structure to keep apart the heat transfer between solidification heating part (15) and shaping section (12), reduce the influence of metal heat transfer to resin transfer passage (2) and shaping section (12) interior resin flow performance.

The inner surface of the curing section (10) is tightly connected with the heating curing part (15), the curing section is of a variable cross-section structure, a wedge-shaped structure is formed between the outer surface of the section connected with the heat insulation section and the surface of the metal section, and the wedge-shaped opening is the same as the drawing direction (17). The section of the curing section (10) connected with the demoulding area is of an equal section structure so as to ensure the accuracy of the size of the inner surface of the thermosetting plastic layer (20); the demoulding area (9) is of a variable cross-section structure, and the size of the outer contour of the cross section of the demoulding area is gradually reduced along the drawing direction, so that the composite die body (16) is conveniently separated from the thermosetting plastic layer (20).

When the composite die is positioned at the beginning end of the metal section (1), the end face baffle (7) can seal the end part of a thermosetting plastic molding cavity, the end face baffle (2) and the outer contour of a demolding area (9) are sealed in a clearance fit or sealing ring mode, the end face baffle (7) and the end face of the metal section (1) are sealed in a flexible pad or elastic pad mode, the end face baffle (7) and the metal section are locked and separated by a locking/separating device (8), the end face baffle (7) and the locking/separating device (8) are connected in a mechanical fixed mode, and the locking/separating device (8) is formed by an inner hole of the composite section and the periphery of the metal section; the main body of the locking/releasing device (8) is an electromagnet, when the electromagnet is electrified, the electromagnet is attracted with the end part of the demoulding area (9) positioned in the inner hole of the composite section and the fixer (6) positioned at the periphery of the metal section, when the electromagnet is separated, the electromagnet is powered off, under the action of the drawing mechanism, the end face baffle (2) and the locking/releasing device (8) are automatically separated from the composite forming die (16), and the electrifying time and the locking force of the locking/releasing device depend on the length of the curing area, the curing temperature and the material performance of thermosetting resin.

each section of the composite die (16) can be manufactured independently and then connected and assembled into a whole, and can also be designed into a part from multiple sections and then assembled into a whole.

the invention has the advantages that:

(1) The invention can be suitable for the clad composite section prepared by metal sections such as round tubes, square tubes, special tubes and the like by changing the design of the die;

(2) The surface finish and the size precision of the inner cavity of the thermosetting plastic are high due to the adoption of the composite die;

(3) Because the curing section of the composite die adopts a variable cross-section structure, the pressure adjustment during the resin heating curing 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;

(4) 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;

(5) The device adopts a radial dynamic pressure sealing ring form for sealing the thermosetting plastic of the composite die, realizes sealing by utilizing the elastic deformation of the sealing ring, and can reduce the requirement on the dimensional precision of the inner cavity of the metal section, thereby saving the production cost of the metal section and further reducing the production cost of the composite section;

(6) 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 view of the structure of the composite mold of the present invention. (1) Is a coated metal section bar; (7) the end face baffle is made of structural materials such as steel, aluminum alloy and the like, the end face baffle (7) and the demolding section of the composite mold are sealed in a clearance fit or sealing ring mode and the like, the end face baffle (7) and the end face of the metal section are sealed in a felt or high-elasticity material gasket mode and the like. (8) The locking/disengaging device, the body uses the polylith or integral electromagnet to make up, the connection structure that the electro-magnet is fixed to between the end surface baffles (2) uses the metal to make; a locking/disengaging device (8) is provided with a timing automatic power-off function. (15) The curing temperature control component adopts a thermocouple and a temperature controller. (5) The heat insulating pad is made of heat insulating materials such as superfine glass wool, high silicon-oxygen cotton and the like. (16) The composite die is made of metal. (2) The cross-sectional structure of the resin transfer passage is circular. (3) The sealing ring is made of rubber, silica gel and other materials. (4) Forming a cavity for the thermosetting plastic layer. (14) The positioning section is made of metal materials such as steel, aluminum alloy and the like; (13) the sealing section is made of metal materials such as steel, aluminum alloy and the like; (12) the forming section is made of metal materials such as steel, aluminum alloy and the like; (11) the heat insulation section is made of materials such as steel, aluminum alloy, copper alloy and the like; (10) the solidifying section is made of steel, aluminum alloy, copper alloy and other materials; the demoulding area (9) is made of steel materials.

FIG. 2 is a schematic diagram of the apparatus of the present invention. (18) The drawing mechanism adopts a chain type, a hydraulic drawing machine or other mechanisms capable of providing linear reciprocating power, and (4) the drawing mechanism adopts a flexible pipe and rubber pipes and other forms; (19) a pump mode is adopted for a resin conveying mechanism; (3) is a sealing ring; (15) curing the part for heating; (20) is a composite thermosetting plastic layer; (21) a molding cavity for thermosetting plastic; (16) the composite forming die is made of metal, and the specific structure is described in detail in figure 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 phi 30 steel pipe, the drawing mechanism (18) adopts a chain type drawing machine; (16) the composite die is a composite die, is made of steel and adopts a combined structure, the positioning section and the forming section are one part, the positioning section adopts a conical structure and is provided with 2 resin conveying channels, the sealing ring (3) adopts an O-shaped rubber ring, and the metal thickness of the thin-wall structure of the heat insulation section is 2 mm; the end face baffle (7) 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; (19) a resin pump form is adopted for the resin conveying mechanism; (4) a rubber pipe is adopted as the flexible pipe, and the connection of the two ends of the flexible pipe adopts a threaded connection mode; (15) the heating and curing part adopts a resistance heating mode, and the temperature control part adopts a T-shaped thermocouple and temperature controller mode.