A detachable electromagnetic heating mold for in-situ curing of composite materials

Abstract

A detachable electromagnetic heating mold for in-situ curing of composite materials, the present invention relates to an electromagnetic heating mold, the present invention is to solve the problems of uneven heating temperature control, low efficiency and potential safety hazards in the mold in the prior art, and to realize the winding in-situ curing molding process of pressure vessel-shaped products, it includes a spindle clamping end, a mold shell and an electromagnetic coil mandrel; one end of the mold shell is fixedly connected to the spindle clamping end, the fixed end of the electromagnetic coil mandrel is fixedly connected to the other end of the mold shell, and the heating part of the electromagnetic coil mandrel is inserted in the mold shell. The present invention belongs to the field of composite material processing.

Description

Technical Field

[0001] The invention relates to an electromagnetic heating mould, in particular to a detachable electromagnetic heating mould for in-situ curing of composite materials. The invention belongs to the field of composite material processing. Background Art

[0002] Fiber reinforced composite winding technology is a molding method for resin-based fiber reinforced composite materials. It winds the pre-prepared prepreg or prepreg tape on the core mold according to a certain trajectory, and completes the in-situ curing of the composite material by heating during winding. The final product can be obtained after the winding is completed. Compared with the traditional external heating curing process, in view of its long curing time, high cost, and low product molding quality, the method of heating the metal core mold or lining inside the winding shell can be used to achieve the in-situ curing molding of the composite material being wound. This process is called the in-mold heating curing process. Its advantage is that the composite material is cured layer by layer from the inside to the outside under the action of internal hot pressure, which is conducive to the flow of resin and the discharge of bubbles, making the material more compact. At present, the commonly used heating methods in the internal heating curing process are thermal oil heating, resistance heating, electromagnetic induction heating, etc. When heating with thermal oil or steam, on the one hand, the uniformity of the mold surface temperature cannot be guaranteed, and on the other hand, there are safety hazards of thermal oil and steam leakage; resistance heating has large heat loss, great impact on ambient temperature, frequent maintenance, unstable temperature control, etc. In addition, for the preparation of pressure vessel-shaped parts that are often used in fiber-reinforced composite winding technology, traditional internal heating molds cannot meet the demoulding requirements of keeping the parts intact, and have poor flexibility and adaptability. Summary of the invention

[0003] In order to solve the problems of uneven heating temperature control, low efficiency and potential safety hazards in the mold in the prior art, and to realize the winding in-situ curing molding process of pressure vessel-shaped products, the present invention further provides a detachable electromagnetic heating mold for in-situ curing of composite materials.

[0004] The technical solution adopted by the present invention to solve the above problems is:

[0005] It includes a spindle clamping end, a mold shell and an electromagnetic coil core shaft; one end of the mold shell is fixedly connected to the spindle clamping end, the fixed end of the electromagnetic coil core shaft is fixedly connected to the other end of the mold shell, and the heating part of the electromagnetic coil core shaft is inserted into the mold shell.

[0006] The beneficial effects of the present invention are:

[0007] The present invention provides an electromagnetic heating mold, which is mainly used for winding molding of pressure vessel-shaped shells, and can also be used for pipe winding. It also has a detachable split structure, which is convenient for product demoulding and length design, and ensures the flexibility of the detachable design and overall rigidity. The special angle design of the head petal unit is used to radially limit each head block, and the design of the wedge-shaped tenon structure and the L-shaped ring groove simultaneously ensures the simplicity of repeated assembly and the strength of the connection to the greatest extent. The design of the cylindrical connection unit makes the mold highly expandable and dimensional adjustable, and the connection is simple and stable. Each detachable part of the core mold can be taken out axially from the inside of the mold without damaging the wound product, so as to achieve rapid and complete demoulding of the pressure vessel wound product after in-situ curing. In terms of heating method, compared with the existing hot oil heating and resistive heating core mold, electromagnetic heating uses the eddy current effect of electromagnetic induction to make the mold itself heat up, with high thermal efficiency, and then the temperature of the mold working area is evenly distributed through temperature equalization means, the temperature is well controlled, and the material is cured layer by layer from the inside to the outside, which is conducive to resin flow and bubble discharge, reduces the porosity of the workpiece, and thus improves the interlayer bonding strength of the composite material, improves the mechanical properties of the product, and uniform temperature heating can also reduce the internal stress of the product molding and improve product quality. At the same time, the mold and the processed material exchange heat indirectly or directly, which reduces the bearing maintenance cost and work intensity brought by the use of heated molds under high-temperature process production conditions, reduces equipment failure rate, and improves safety. In addition to being suitable for in-situ curing molding of fiber-reinforced thermosetting resin-based materials, the present invention can also be used to assist in the in-situ curing molding of thermoplastic composite materials; it solves the design problem of internal heating molds for pressure vessel winding under traditional methods, and improves molding quality and efficiency.

[0008] The present application as a whole has one side as an active end clamping part, with a bearing installed inside, and then the left end clamping rod 16 of the electromagnetic heating coil is installed, the mold shell 2 is installed on the clamping end flange part, and the other end is also connected to the clamping end through a flange, and is also connected to an electric slip ring 14 to power the electromagnetic coil. The electric slip ring 14 is equipped with a temperature sensor interface for real-time collection of mold temperature for easy temperature control.

[0009] The present application adopts the electromagnetic coil heating method. There can be no support between the mold shell 2 and the left clamping rod 16. The shell connection and support are provided by the flange structure between the detachable parts. At the same time, because the electromagnetic heating coil cannot rotate, the clamping part of the mold and the left clamping rod 16 adopt the solution of internal and external separation.

[0010] The present application is disassembled from the inside of the wound product. The detachable components are disassembled radially inward by angle design and connection design. During the installation process, there is also a limit design to prevent the components from moving outward and ensure that the installation surface is flat.

[0011] The cylindrical part of the present application is decomposed into three sections in length to avoid low strength when the cylinder is too long. By designing the length of the middle section, it is also easy to change the overall axial size of the mold.

[0012] The connection between the head and the cylinder does not rely on traditional mechanical connection but on L-shaped key and wedge-shaped tenon structure, which ensures stability during installation and easy disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is an axonometric drawing of this application.

[0014] Figure 2 This is the main view of this application.

[0015] Figure 3 It is the right view of this application.

[0016] Figure 4 This is the left side view of Benshen.

[0017] Figure 5 This application Figure 4 Middle BB view.

[0018] Figure 6 This application Figure 2 Center AA view.

[0019] Figure 7 It is a schematic diagram of the connection between the first head assembly unit and the first cylinder connection assembly unit.

[0020] Figure 8 yes Figure 2 Center CC view. DETAILED DESCRIPTION

[0021] Specific implementation method 1: Combination Figure 1-Figure 8 The present embodiment is described as a detachable electromagnetic heating mold for in-situ curing of composite materials, which includes a spindle clamping end 1, a mold shell 2 and an electromagnetic coil core shaft 3; one end of the mold shell 2 is fixedly connected to the spindle clamping end 1, the fixed end of the electromagnetic coil core shaft 3 is fixedly connected to the other end of the mold shell 2, and the heating part of the electromagnetic coil core shaft 3 is inserted into the mold shell 2.

[0022] Specific implementation method 2: Combination Figure 1-Figure 5The present embodiment is described. The present embodiment describes a detachable electromagnetic heating mold for in-situ curing of composite materials. The mold shell 2 includes a group of first cylinder assembly units 10, a group of second cylinder assembly units 11, two groups of first cylinder connection assembly units 8, two groups of second cylinder connection assembly units 9, two groups of first head assembly units 6 and two groups of second head assembly units 7; a group of first cylinder assembly units 10 and a group of second cylinder assembly units 11 are assembled to form a cylinder body, each group of first cylinder connection assembly units 8 and a group of second cylinder connection assembly units 9 are assembled to form a cylinder body, each group of first head assembly units 6 and a group of second head assembly units 7 are assembled to form a head with an external curvature, and a cylinder body assembled by a group of first cylinder connection assembly units 8 and a group of second cylinder connection assembly units 9 and a head assembled by a group of first head assembly units 6 and a group of second head assembly units 7 are symmetrically installed at both ends of the cylinder body assembled by a group of first cylinder assembly units 10 and a group of second cylinder assembly units 11. The rest is the same as the first specific implementation mode.

[0023] Specific implementation method three: Combination Figure 1-Figure 8 This embodiment is described. This embodiment is a detachable electromagnetic heating mold for in-situ curing of composite materials. Each group of first head assembly units 6 includes multiple first head assembly units, and each group of second head assembly units 7 includes multiple second head assembly units. Multiple first head assembly units and multiple second head assembly units are arranged radially and spaced from each other to assemble into a head with an external curvature. One end of each first head assembly unit on a group of first head assembly units 6 is fixedly connected and installed on the main shaft clamping end 1 by bolts, and one end of each second head assembly unit on a group of second head assembly units 7 is fixedly connected and installed on the main shaft clamping end 1 by bolts. One end of each first head assembly unit on another group of first head assembly units 6 is fixedly connected and installed on the fixed end of the electromagnetic coil core shaft 3 by bolts, and one end of each second head assembly unit on another group of second head assembly units 7 is fixedly connected and installed on the fixed end of the electromagnetic coil core shaft 3 by bolts. The rest is the same as the second embodiment.

[0024] Specific implementation method four: Combination Figure 1-Figure 7To explain the present embodiment, the present embodiment describes a detachable electromagnetic heating mold for in-situ curing of composite materials, each group of first cylindrical connection assembly units 8 includes multiple first cylindrical connection assembly units, each group of second cylindrical connection assembly units 9 includes multiple second cylindrical connection assembly units, multiple first cylindrical connection assembly units and multiple second cylindrical connection assembly units are radially spaced apart and assembled to form a cylinder, the other end of each first head assembly unit is provided with an 'L'-shaped key sliding groove, the inner arc surface of one end of each first cylindrical connection assembly unit is processed with an 'L'-shaped key, the other end of each second head assembly unit is processed with a tenon-shaped part tenon groove, and a tenon-shaped part is provided in the tenon-shaped groove, the L'-shaped key sliding groove of each first head assembly unit is provided with an 'L'-shaped key of a first cylindrical connection assembly unit, and each second cylindrical connection assembly unit is arranged opposite to a second head assembly unit. The 'L'-shaped key is clamped in the 'L'-shaped key sliding groove, and when the 'L'-shaped key is rotated circumferentially, the 'L'-shaped key is separated from the block of the 'L'-shaped key sliding groove, and the first head assembly unit is separated from the corresponding first cylinder connection assembly unit. The rest is the same as the specific implementation method three.

[0025] Specific implementation method five: Combination Figure 1-Figure 8 The present embodiment is described. The present embodiment describes a detachable electromagnetic heating mold for in-situ curing of composite materials. A group of first cylindrical assembly units 10 includes a plurality of first cylindrical assembly units. A group of second cylindrical assembly units 11 includes a plurality of second cylindrical assembly units. The plurality of first cylindrical assembly units and the plurality of second cylindrical assembly units are radially spaced apart from each other and assembled to form a cylinder. The inner arc surfaces at both ends of each first cylindrical assembly unit are provided with arc-shaped protrusions, and the arc-shaped protrusions are processed with threaded holes. The inner arc surfaces at both ends of each second cylindrical assembly unit are provided with arc-shaped protrusions, and the arc-shaped protrusions are processed with threaded holes. The inner arc surfaces at the other ends of each first cylindrical connection assembly unit are provided with arc-shaped protrusions. The arc-shaped protrusion is processed with a threaded hole, the inner arc surface of the other end of each second cylindrical connection assembly unit is provided with an arc-shaped protrusion, and the arc-shaped protrusion is processed with a threaded hole, each end of each first cylindrical assembly unit is connected to the first cylindrical connection assembly unit through a double-headed screw, the threaded hole of the arc-shaped protrusion of the first cylindrical assembly unit and the threaded hole of the arc-shaped protrusion of the first cylindrical connection assembly unit are correspondingly arranged, and are threadedly connected through the double-headed screw, each end of each second cylindrical assembly unit is connected to the second cylindrical connection assembly unit through a double-headed screw, the threaded hole of the arc-shaped protrusion of the second cylindrical assembly unit and the threaded hole of the arc-shaped protrusion of the second cylindrical connection assembly unit are correspondingly arranged, and are threadedly connected through the double-headed screw. The rest is the same as the specific embodiment 4.

[0026] Specific implementation method six: Combination Figure 1-Figure 5This embodiment is described as a detachable electromagnetic heating mold for in-situ curing of composite materials. The main shaft clamping end 1 includes a main shaft active clamping part 4 and a right flange connector 5. One end of the main shaft active clamping part 4 is fixedly mounted on the right end of the right flange connector 5, and the flange of the outer wall of the left end of the right flange connector 5 is fixedly mounted on one end of the mold shell 2 by bolts. The rest is the same as the first embodiment.

[0027] Specific implementation method seven: Combination Figure 1-Figure 5 This embodiment is described. In this embodiment, a detachable electromagnetic heating mold for in-situ curing of composite materials is described. One end of each first end assembly unit on a group of first end assembly units 6 is fixedly connected and installed on the flange of the left outer wall of the right flange connector 5 by bolts, and one end of each second end assembly unit on a group of second end assembly units 7 is fixedly connected and installed on the flange of the left outer wall of the right flange connector 5 by bolts. The rest is the same as the specific embodiment three or six.

[0028] Specific implementation method eight: Combination Figure 1-Figure 5 The present embodiment is described as a detachable electromagnetic heating mold for in-situ curing of composite materials. The electromagnetic coil core shaft 3 includes a left flange connector 12, a left bearing end cover 13, an electric slip ring 14, a temperature sensor interface 15, a left end clamping rod 16 and an electromagnetic coil 17; the electric slip ring 14 and the left bearing end cover 13 are rotatably connected and sleeved on the left end clamping rod 16, the right end of the left end clamping rod 16 is inserted into the mold shell 2, the electromagnetic coil 17 is sleeved on the right end of the left end clamping rod 16, the left bearing end cover 13 is fixedly mounted on the left end of the left flange connector 12 by bolts, the flange of the outer side wall of the right end of the left flange connector 12 is fixedly mounted on the other end of the mold shell 2 by bolts, and the temperature sensor interface 15 is arranged on the electric slip ring 14. The electromagnetic coil 17 is wound on a core shaft and installed inside the mold through a bearing. The electromagnetic coil 17 is provided with alternating current through an electric slip ring 14 and a wire, and is connected to the spindle hole of the machine tool through the inner hole of the left-end clamping rod 16 where the electromagnetic coil 17 is located and the inner hole of the spindle active clamping part 4, and is connected to an external power supply. While supplying power, the core shaft where the electromagnetic coil 17 is located is kept stationary, and then heated by the electromagnetic coil core shaft 3. The left end of the left-end clamping rod 16 can be fixed and clamped with a chuck when working, and a tapered hole can also be processed at the left end of the left-end clamping rod 16. The left end of the left-end clamping rod 16 is limited and fixed by the top tip being placed in the tapered hole. The rest is the same as the third specific implementation method.

[0029] Specific implementation method nine: Combination Figure 1-Figure 5This embodiment is described. In this embodiment, a detachable electromagnetic heating mold for in-situ curing of composite materials is described. One end of each first end assembly unit on another group of first end assembly units 6 is fixedly connected and installed on the flange of the right end outer wall of the left flange connector 12 by bolts, and one end of each second end assembly unit on another group of second end assembly units 7 is fixedly connected and installed on the flange of the right end outer wall of the left flange connector 12 by bolts. The rest is the same as the specific embodiment eight.

[0030] Specific implementation method ten: Combination Figure 1 and Figure 5 This embodiment is described as a detachable electromagnetic heating mold for in-situ curing of composite materials, which also includes two deep groove ball bearings, and the left end clamping rod 16 is rotatably connected to the right flange connector 5 and the left flange connector 12 through the deep groove ball bearings. The rest is the same as the sixth or ninth embodiment.

[0031] How it works

[0032] When the composite material is wound, the main shaft clamping end 1 of the assembled heating mold is fixed on the main shaft three-jaw chuck, and the electromagnetic coil core shaft 3 is installed on the tailstock of the machine tool to complete the clamping of the mold; during winding, the main shaft clamping end 1 of the mold rotates, and the left end clamping rod 16 inside the mold shell 2 does not move, and the relative rotation of the left end clamping rod 16 outside and inside the mold is achieved through two deep groove ball bearings; an electromagnetic coil is wound on the left end clamping rod 16, and power is supplied through the electric slip ring 14. The electromagnetic coil passes an alternating current to generate an alternating magnetic field, and the mold shell generates an induced current, that is, eddy current, through electromagnetic induction to complete the mold heating; the mold temperature can be measured by using the temperature sensor connected to the temperature sensor interface 15, and the temperature signal is derived from the temperature sensor interface 15 to achieve temperature measurement and stable control; when the mold is wound, the main shaft clamping end 1 of the mold rotates, and the left end clamping rod 16 inside the mold shell 2 does not move, and the left end clamping rod 16 outside and inside the mold rotates relative to each other; the left end clamping rod 16 is wound with an electromagnetic coil, and power is supplied through the electric slip ring 14. The electromagnetic coil passes an alternating current to generate an alternating magnetic field, and the mold shell generates an induced current, that is, eddy current, through electromagnetic induction to complete the mold heating; the mold temperature can be measured by using the temperature sensor connected to the temperature sensor interface 15, and the temperature signal is derived from the temperature sensor interface 15 to achieve temperature measurement and stable control; when the mold is wound, the main shaft clamping end 16 rotates, and the left end clamping rod 16 inside and outside the mold is rotated relative to each other; the left end clamping rod 16 is wound with an electromagnetic coil, and power is supplied through the electric slip ring 14. The electromagnetic coil passes an alternating current to generate an alternating magnetic During winding, the impregnated fiber or composite material prepreg tape is led out of the wire nozzle and wound onto the heated mold surface, and the movement of the wire nozzle drives the fiber to be arranged on the mold surface according to the set trajectory, and the material is heated and solidified on the mold; after the winding is completed, the mold is first removed from the main shaft, the right-side flange connector 5 and the left-side flange connector 12 are removed, and the two deep groove ball bearings are removed. Then, the left-end clamping rod 16 is pulled out, and the second head assembly unit 7 is removed along the tenon groove and then taken out from the head pole hole, and then the first head assembly unit 6 is removed along the circumferential sliding groove of the 'L'-shaped key and removed in the axial direction. The remaining groups and the head units on the other side can be disassembled according to the above steps in sequence; finally, the cylindrical unit and the cylindrical connection unit are removed in sequence along the radial direction pointing to the axial direction to complete the disassembly and demolding of the entire mold.

[0033] The above embodiments only express the implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A detachable electromagnetic heating mold for in-situ curing of composite materials, characterized in that: It comprises a main shaft clamping end (1), a mold shell (2) and an electromagnetic coil core shaft (3); the mold shell (2) comprises a group of first cylinder assembly units (10), a group of second cylinder assembly units (11), two groups of first cylinder connection assembly units (8), two groups of second cylinder connection assembly units (9), two groups of first head assembly units (6) and two groups of second head assembly units (7); each group of first head assembly units (6) comprises a plurality of first head assembly units, each group of second head assembly units (7) comprises a plurality of second head assembly units, and each group of first cylinder connection assembly units (8) comprises a plurality of second cylinder connection assembly units (9). The connecting assembly unit (8) includes a plurality of first cylinder connecting assembly units, each group of second cylinder connecting assembly units (9) includes a plurality of second cylinder connecting assembly units, a group of first cylinder assembly units (10) includes a plurality of first cylinder assembly units, a group of second cylinder assembly units (11) includes a plurality of second cylinder assembly units, one end of the mold shell (2) is fixedly connected to the main shaft clamping end (1), the fixed end of the electromagnetic coil core shaft (3) is fixedly connected to the other end of the mold shell (2), and the heating part of the electromagnetic coil core shaft (3) is inserted into the mold shell (2). A group of first cylinder assembling units (10) and a group of second cylinder assembling units (11) are assembled to form a cylinder body; each group of first cylinder connecting assembling units (8) and a group of second cylinder connecting assembling units (9) are assembled to form a cylinder body; each group of first head assembling units (6) and a group of second head assembling units (7) are assembled to form a head with an external curvature; a cylinder body assembled by a group of first cylinder connecting assembling units (8) and a group of second cylinder connecting assembling units (9) and a head assembled by a group of first head assembling units (6) and a group of second head assembling units (7) are symmetrically mounted at both ends of the cylinder body assembled by a group of first cylinder assembling units (10) and a group of second cylinder assembling units (11); A plurality of first end-cap assembly units and a plurality of second end-cap assembly units are arranged radially and spaced from each other to assemble and form an end-cap with an external curvature; one end of each first end-cap assembly unit on a group of first end-cap assembly units (6) is fixedly connected and mounted on the main shaft clamping end (1) by means of bolts; one end of each second end-cap assembly unit on a group of second end-cap assembly units (7) is fixedly connected and mounted on the main shaft clamping end (1) by means of bolts; one end of each first end-cap assembly unit on another group of first end-cap assembly units (6) is fixedly connected and mounted on the fixed end of the electromagnetic coil core shaft (3) by means of bolts; one end of each second end-cap assembly unit on another group of second end-cap assembly units (7) is fixedly connected and mounted on the fixed end of the electromagnetic coil core shaft (3) by means of bolts; A plurality of first cylindrical connection assembling units and a plurality of second cylindrical connection assembling units are arranged radially and spaced from each other to assemble into a cylindrical body, an 'L'-shaped key sliding groove is provided at the other end of each first head assembling unit, an 'L'-shaped key is processed on the inner arc surface of one end of each first cylindrical connection assembling unit, a tenon-shaped groove is processed at the other end of each second head assembling unit, and a tenon-shaped part is provided in the tenon-shaped groove, an 'L'-shaped key of a first cylindrical connection assembling unit is provided in the L'-shaped key sliding groove of each first head assembling unit, and each second cylindrical connection assembling unit is arranged opposite to a second head assembling unit, A plurality of first cylindrical assembling units and a plurality of second cylindrical assembling units are arranged radially and spaced from each other to assemble into a cylindrical body, an inner arc surface at both ends of each first cylindrical assembling unit is provided with an arc-shaped protrusion, and the arc-shaped protrusion is processed with a threaded hole, an inner arc surface at both ends of each second cylindrical assembling unit is provided with an arc-shaped protrusion, and the arc-shaped protrusion is processed with a threaded hole, an inner arc surface at the other end of each first cylindrical connecting assembling unit is provided with an arc-shaped protrusion, and the arc-shaped protrusion is processed with a threaded hole, an inner arc surface at the other end of each second cylindrical connecting assembling unit is provided with an arc-shaped protrusion, and the arc-shaped protrusion is processed with a threaded hole, each end of each first cylindrical assembling unit is connected to the first cylindrical connecting assembling unit by a double-headed screw, and each end of each second cylindrical assembling unit is connected to the second cylindrical connecting assembling unit by a double-headed screw, The spindle clamping end (1) comprises a spindle active clamping portion (4) and a right flange connecting piece (5); one end of the spindle active clamping portion (4) is fixedly mounted on the right end of the right flange connecting piece (5); a flange on the outer side wall of the left end of the right flange connecting piece (5) is fixedly mounted on one end of the mold shell (2) by bolts. One end of each first end assembly unit in a group of first end assembly units (6) is fixedly connected and mounted on the flange of the left outer wall of the right flange connection piece (5) through bolts, and one end of each second end assembly unit in a group of second end assembly units (7) is fixedly connected and mounted on the flange of the left outer wall of the right flange connection piece (5) through bolts. The electromagnetic coil core shaft (3) comprises a left flange connector (12), a left bearing end cover (13), an electric slip ring (14), a temperature sensor interface (15), a left end clamping rod (16) and an electromagnetic coil (17); the electric slip ring (14) and the left bearing end cover (13) are rotatably connected and sleeved on the left end clamping rod (16); the right end of the left end clamping rod (16) is inserted into the mold shell (2); the electromagnetic coil (17) is sleeved on the right end of the left end clamping rod (16); the left bearing end cover (13) is fixedly mounted on the left end of the left flange connector (12) by bolts; the flange of the outer wall of the right end of the left flange connector (12) is fixedly mounted on the other end of the mold shell (2) by bolts; the temperature sensor interface (15) is arranged on the electric slip ring (14); One end of each first end assembly unit on another group of first end assembly units (6) is fixedly connected and mounted on the flange of the right end outer wall of the left flange connector (12) through bolts, and one end of each second end assembly unit on another group of second end assembly units (7) is fixedly connected and mounted on the flange of the right end outer wall of the left flange connector (12) through bolts. The detachable electromagnetic heating mold also includes two deep groove ball bearings, and the left end clamping rod (16) is rotatably connected to the right flange connecting piece (5) and the left flange connecting piece (12) through the deep groove ball bearings.

Images