MC pipe centrifugal forming machine

Abstract

According to the MC pipe centrifugal forming machine, only the left main shaft connected with the mold is needed to drive the mold to rotate, power consumption is low, the left baffle and the right baffle at the two ends of the mold can be conveniently separated from the mold, heat dissipation and cooling can be conveniently conducted on a formed MC pipe in the mold, and a power device is not additionally arranged.

Description

TECHNICAL FIELD

[0001] The utility model relates to MC pipe forming structure especially MC pipe centrifugal forming machine. BACKGROUND

[0002] In the prior art, the pipe preparation process uses upper and lower molds, which has a complex structure, or needs rotating wheels on both sides of the mold axis to drive the mold to rotate, which consumes a lot of power. In the MC pipe preparation process, heating is needed, so the mold needs to be able to rotate, and it is also necessary to conveniently inject slurry into the mold, so that the existing MC pipe forming mechanism is complex, and the product in the mold is also difficult to push out. UTILITY MODEL CONTENTS

[0003] To solve the above problems, the utility model provides a kind of MC pipe centrifugal forming machine, only need to connect the left spindle of mold to drive mold rotation, consume less power, and the left baffle and right baffle of both ends of mold are conveniently separated from mold, conveniently cool the MC pipe formed in mold, without increasing power device.

[0004] The technical scheme of the utility model is as follows: a kind of MC pipe centrifugal forming machine, including cylindrical mold, left baffle and right baffle are respectively arranged at both ends of mold, left baffle and right baffle are fixedly connected with mold through annular groove and annular insert plate with appropriate size respectively, sealing pad is arranged between annular groove and annular insert plate, rotating power device for driving mold rotation is fixedly connected to left baffle, right spindle is arranged at the right side of mold, rotating sleeve is connected to right spindle through bearing, and rotating sleeve is fixedly connected with right baffle;

[0005] Slurry delivery channel is arranged in the center of right spindle, slurry delivery channel is communicated with slurry injection port or slurry injection device through slurry injection pipe I, through hole is formed in the center of right baffle, slurry injection pipe II is arranged in the center of through hole, through hole and slurry injection pipe II are gap matched, one end of slurry injection pipe II is communicated with slurry delivery channel, and the other end of slurry injection pipe II extends into the center of mold;

[0006] Heating device is arranged outside mold.

[0007] Annular push plate is fixedly connected to the outer periphery of both ends of mold, ejection axial telescopic rod I for unidirectionally pushing annular push plate along the axis of mold is further arranged at both ends of mold, and ejection axial telescopic rod I is respectively corresponding to annular push plate at both ends of mold.

[0008] Ejection axial telescopic rod I is the push rod of hydraulic cylinder II, the push rod of pneumatic cylinder II or electric push rod II.

[0009] Left spindle is fixedly connected to the center of left baffle, and rotating power device is connected to left baffle through left spindle.

[0010] The forming machine frame is provided with a heat preservation box, a left fixed shaft and a left fixed shaft passing hole I are arranged on the heat preservation box, and the left fixed shaft and the left fixed shaft are rotatably connected with the heat preservation box through a bearing in a clearance fit mode.

[0011] A left fixed shaft and a left fixed shaft passing hole I are arranged on the heat preservation box, and the left fixed shaft and the left fixed shaft are rotatably connected with the heat preservation box through a bearing in a clearance fit mode.

[0012] A left fixed shaft and a left fixed shaft passing hole I are arranged on the heat preservation box, and the left fixed shaft and the left fixed shaft are rotatably connected with the heat preservation box through a bearing in a clearance fit mode.

[0013] An exhaust port is arranged on the heat preservation box, and water vapor is discharged.

[0014] A left fixed shaft and a left fixed shaft passing hole I are arranged on the heat preservation box, and the left fixed shaft and the left fixed shaft are rotatably connected with the heat preservation box through a bearing in a clearance fit mode.

[0015] A left fixed shaft and a left fixed shaft passing hole I are arranged on the heat preservation box, and the left fixed shaft and the left fixed shaft are rotatably connected with the heat preservation box through a bearing in a clearance fit mode.

[0016] A left fixed shaft and a left fixed shaft passing hole I are arranged on the heat preservation box, and the left fixed shaft and the left fixed shaft are rotatably connected with the heat preservation box through a bearing in a clearance fit mode.

[0017] A left fixed shaft and a left fixed shaft passing hole I are arranged on the heat preservation box, and the left fixed shaft and the left fixed shaft are rotatably connected with the heat preservation box through a bearing in a clearance fit mode.

[0018] A left fixed shaft and a left fixed shaft passing hole I are arranged on the heat preservation box, and the left fixed shaft and the left fixed shaft are rotatably connected with the heat preservation box through a bearing in a clearance fit mode.

[0019] A left fixed shaft and a left fixed shaft passing hole I are arranged on the heat preservation box, and the left fixed shaft and the left fixed shaft are rotatably connected with the heat preservation box through a bearing in a clearance fit mode.

[0020] The utility model discloses a kind of MC pipe centrifugal forming machines, only need to connect the left main shaft of mould to drive mould rotation, consume less power, and mould two ends left baffle, right baffle are separated with mould, conveniently heat dissipation cooling of the MC pipe of the mould in is formed, without increasing power device. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 It is the structure schematic diagram of the utility model.

[0022] Fig. 2 is a top view structure schematic diagram of the utility model.

[0023] Fig. 3 is a front view structure schematic diagram of the utility model.

[0024] Fig. 1, annular push plate 10, ejection shaft telescopic rod I 11, left baffle 2, left main shaft 21, bearing seat 22, rotating wheel 23, driving wheel 24, motor 25, mounting frame I 26, right baffle 3, mounting seat 31, right main shaft 32, rotating sleeve 33, grouting port 34, mounting frame II 35, grouting pipe I 36, flow sensor 37, valve 38, annular groove 4, annular plug plate 5, heat preservation box 6, bracket I 60, heating device 61, switch door 62, exhaust port 63, forming machine rack 7, mold table 8, ejection shaft telescopic rod II 80, push plate 81, bracket II 82, supporting wall 83, adjusting block 84, manipulator 9. DETAILED DESCRIPTION

[0025] The technical scheme of the utility model will be described clearly and completely in combination with the drawings and specific embodiments, and it should be understood that the preferred embodiments described herein are only used for illustrating and explaining the utility model, and cannot be understood as limiting the protection scope of the utility model, and skilled persons in the art can make some non-essential improvements and adjustments according to the contents of the utility model. In the utility model, unless otherwise explicitly specified and limited, the technical terms used in the application should be the general meanings understood by the technical personnel described in the utility model.

[0026] As shown in Figs. 1-3 Fig. 1, an MC pipe centrifugal forming machine, the mold is cylindrical, the two ends of the mold are respectively provided with a left baffle 2 and a right baffle 3, the left baffle 2 and the right baffle 3 are connected with the mold 1 through the annular groove 4 and the annular plug plate 5 with appropriate size respectively, the annular groove 4 and the annular plug plate 5 are provided with a sealing gasket, the left baffle 2 is fixedly connected with a rotating power device for driving the mold to rotate, the right side of the mold is provided with a right main shaft 32, the right main shaft 32 is connected with a rotating sleeve 33 through a bearing, and the rotating sleeve 33 is fixedly connected with the right baffle 3; the right main shaft is provided with a power device for driving the right main shaft to move axially to the right;

[0027] The center of the right main shaft is provided with a slurry delivery channel, the slurry delivery channel is communicated with the grouting port 34 or the grouting device through the grouting pipe I 36, the center of the through hole in the right baffle is provided with a grouting pipe II, the through hole and the grouting pipe II are gap matched, one end of the grouting pipe II is communicated with the slurry delivery channel, and the other end of the grouting pipe II extends into the center of the mold, so that the slurry can be delivered into the mold;

[0028] The mold is provided with a heating device outside;

[0029] The mold 1 is also fixedly connected with annular push plates 10 at both ends, and the mold is also provided with ejection axial telescopic rods I 11 at both ends, the ejection axial telescopic rods I 11 correspond to the annular push plates 10 at both ends of the mold respectively, after the products in the mold are completed, the ejection axial telescopic rods I 11 extend to the annular push plates 10 and contact the annular push plates 10, then the ejection axial telescopic rods I 11 extend along the axial direction, push the annular push plates 10, and separate the mold from the left and right baffle plates at both ends.

[0030] The left baffle plate 2 is fixedly connected with a left main shaft 21 at the center, and the left baffle plate 2 is connected with a rotary power device through the left main shaft 21.

[0031] Specifically, the left main shaft 21 is provided with a rotating wheel 23, the rotating wheel 23 is connected with a driving wheel 24 installed on the rotating shaft of a motor 25 through a belt or a chain, so as to drive the mold 1 to rotate through the rotation of the motor 25.

[0032] The left main shaft 2 is a power shaft and is integrated with the motor, when the length of the mold changes greatly, the positions of the left main shaft and the motor are manually shifted, and the positions of the left main shaft and the motor are fixed by fasteners such as bolts after the shift.

[0033] The left main shaft 21 and the motor 25 are provided below with a mounting bracket I 26, and the mold is provided below with a forming machine rack 7, the mounting bracket I 26 is separately provided from the forming machine rack 7, so as to facilitate the adjustment of the distance between the mounting bracket I 26 and the forming machine rack 7.

[0034] The left main shaft 21 is connected with a bearing seat 22 through a bearing, and the bearing seat 22 is installed on the mounting bracket I 26.

[0035] The right main shaft 32 is a driven shaft, which is driven by a power device such as a hydraulic cylinder I, a pneumatic cylinder I, and an electric push rod I to move axially and press the mold, or to release the mold, and the moving distance can be 40-60MM.

[0036] The right main shaft 32 is fixed on a mounting seat 31, and the mounting seat 31 is provided below with a mounting bracket II 35, the mounting bracket II 35 is provided with an axial groove, the mounting seat 31 is arranged in the axial groove and is limited on both sides of the axial direction, so that when the power device pushes the right main shaft to move towards the mold on the bracket, the mold is accurately corresponding to the annular groove 4 and the annular insert plate 5 on the right baffle plate, and the mold is accurately corresponding to the annular groove 4 and the annular insert plate 5 on the left baffle plate.

[0037] If the length of the mold is changed, the left main shaft and the motor driving the left main shaft are manually adjusted, and then the positions of the left main shaft and the mounting bracket I 26 driving the left main shaft to rotate are fixed by fasteners such as bolts; if the length of the mold to be replaced is unchanged, the positions of the left main shaft and the mounting bracket I 26 driving the left main shaft to rotate do not need to be adjusted.

[0038] The ejection axial telescopic rod Ⅰ 11 is a push rod Ⅱ of a hydraulic cylinder, a push rod of a pneumatic cylinder Ⅱ, or an electric push rod Ⅱ.

[0039] At the temperature for preparing the MC, the mold rotates, and the mold is injected with slurry, and after the injection is completed, the mold continues to rotate, so that the MC pipe material can be formed on the inner wall of the mold.

[0040] The mold 1 is further provided with a heat preservation box 6, which is arranged on a forming machine rack 7, and a bracket Ⅰ 60 for placing the mold is arranged in the heat preservation box. A heating device 61 is arranged below the bracket 60, and the heating device can be a heating pipe. The heat preservation box 6 is provided with an opening and closing door 62 for the mold. The opening and closing door can be a pneumatic door or an electric door. The power device of the door can be connected with a PLC, and the opening and closing of the door is controlled by the PLC.

[0041] When the mold is replaced, the mold is first placed on the bracket Ⅰ 60, and then the power device drives the right main shaft to move axially to the right, so that the mold is axially connected with the left baffle and the right baffle. The left baffle and the right baffle are connected with the mold through corresponding annular grooves 4 and annular inserts 5 respectively.

[0042] In order to facilitate the rotation of the mold 1, only the inner groove wall of the annular groove 4 is inclined inward, or only the outer groove wall is inclined outward, or the outer opening of the annular groove 4 gradually increases, and the inner opening is matched with the thickness gap of the annular insert 5. The outer opening gradually increases to be inclined inward on the inner groove wall and inclined outward on the outer groove wall. Thus, after the right main shaft moves to the left, the mold placed on the bracket Ⅰ can be connected with the left baffle and the right baffle at both ends, and the mold position is slightly raised to be separated from the bracket Ⅰ, so as to better rotate.

[0043] A sealing gasket can be arranged in the annular groove 4, so as to realize the sealing connection of the mold annular groove 4 and the annular insert 5.

[0044] The heating device 61 can be connected with a power source outside the heat preservation box.

[0045] The wall of the heat preservation box is welded by double-layer 3MM thick 304 stainless steel plates, and the double-layer 304 stainless steel plates are filled with heat preservation cotton therebetween, so as to heat preservation the mold in the heat preservation box.

[0046] A through hole Ⅰ through which the left main shaft passes is arranged on the heat preservation box, and the left main shaft is matched with the heat preservation box in a gap or rotatably connected through a bearing, so as to realize the rotation of the left fixed shaft and the non-rotation of the heat preservation box.

[0047] A through hole Ⅱ through which the ejection axial telescopic rod Ⅰ 11 at both ends of the mold passes is further arranged on the heat preservation box. When the ejection axial telescopic rod Ⅰ 11 does not need to work, the ejection axial telescopic rod Ⅰ 11 is located in the through hole Ⅱ.

[0048] The incubator is placed on the frame 7 of the molding machine, preferably fixed on the frame 7 of the molding machine, and the frame is provided with a mold table 8 and a manipulator 9. The mold table 8 is provided with a bracket II 82 for placing the mold, and the manipulator 9 carries the mold between the bracket II 82 and a bracket I 60.

[0049] After the MC pipe in the mold is formed, the switch door 62 of the incubator is opened, and the manipulator 9 takes out the mold 1 in the incubator and carries it to the bracket II 82 on the mold table for cooling.

[0050] One end of the bracket II 8 is provided with an ejection axial telescopic rod II 80, and a push plate 81 is installed on the ejection axial telescopic rod II. The push plate 81 corresponds to the product in the mold, and the push plate 81 first extends to the product in the mold, then tightly abuts against the product in the mold, and then continues to move axially, so as to push the product in the mold out from the other end.

[0051] When the product in the mold is cooled, the MC pipe product in the mold can be easily separated from the inner wall of the mold after shrinking, so that the push plate can easily push the product in the mold out from the other end of the mold.

[0052] Moreover, if the ejection axial telescopic rod II 80 is pushed with relatively large force, due to the existence of the annular push plate 10 on the mold, the lower end of the annular push plate 10 is lower than the mold, so the annular push plate 10 can be blocked on the bracket II 8 for placing the mold, facilitating the separation of the mold and the product.

[0053] The upper part of each end of the bracket I and the bracket II is provided with two inclined upward supporting walls 83. The two inclined upward supporting walls 83 at each end are symmetrically arranged, and the distance between the two supporting walls 83 gradually increases from bottom to top. Adjustment blocks 84 can be added to the supporting walls 83 to adapt to molds of different diameters.

[0054] The ejection axial telescopic rod II 80 is a push rod of a hydraulic cylinder III, a push rod of a pneumatic cylinder III, or an electric push rod III.

[0055] The manipulator is a conventional device in the prior art, and will not be described here.

[0056] The manipulator 9, the switch door 62, the ejection axial telescopic rod I 11, the ejection axial telescopic rod II 80, and the motor are respectively connected with the PLC, and the work of the manipulator, the ejection axial push rod I, the ejection axial push rod II, and the motor is controlled through the PLC. The power device of the right main shaft is connected with the PLC, and whether the power device controls the right main shaft to move to the right main shaft direction or not is controlled through the PLC, so as to press the mold.

[0057] The motor can be a variable speed motor, so as to adjust the rotating speed of the left main shaft.

[0058] The left baffle 2 is provided with a travel switch I, which is connected with the PLC. When the right baffle presses the mold, the annular push plate 10 of the mold will hit the switch, so that the travel switch I is connected or disconnected, thereby sending a signal to the PLC, so as to determine that the mold is in place on the bracket.

[0059] The travel switch I can also be arranged at other positions, as long as it is connected or disconnected when the right baffle presses the mold, thereby sending a signal to the PLC, so as to determine that the mold is in place on the bracket.

[0060] The mold table is provided with a position sensor or a travel switch II, which is connected with the PLC. When the mold reaches the target position on the bracket II, a signal is sent to the PLC to determine that the mold is in place on the bracket II.

[0061] The grouting pipe I 36 is provided with a flow sensor 37, which is connected with the PLC, so as to facilitate the PLC to determine whether the grouting is completed. The grouting pipe I 36 is provided with a valve 38, which is an electric valve or a pneumatic valve. The valve is connected with the PLC, and the opening and closing of the valve is controlled by the PLC, so as to control whether the mold is grouted.

[0062] The heating device 61 is connected with the PLC, and the heating power of the heating device is controlled by the PLC to adjust the heating temperature. The control mode is prior art, which will not be described here.

[0063] The temperature sensor is arranged in the incubator, and the temperature sensor is connected with the PLC. The temperature sensor detects the temperature in the incubator and sends it to the PLC, so as to facilitate the PLC to determine whether the temperature in the incubator meets the standard.

[0064] The incubator is provided with an exhaust port 63, and water vapor is discharged.

[0065] The whole working process: if using the same size mold, the switch door on the incubator is opened, the manipulator transfers the mold placed on the mold table to the bracket I in the incubator, the power device pushes the right spindle to the mold, the mold is connected with the left baffle and the right baffle on the left spindle and the right spindle, after the connection, the power device still pushes the right spindle to the mold (i.e. pushes the right spindle to the left), the switch door on the incubator is closed, the heating pipe in the incubator starts to work, after the temperature in the incubator reaches the target temperature, the motor drives the left spindle to rotate, thereby driving the mold in the incubator to rotate, and at the same time, the grout is injected into the mold, the grout passes through the grout injection port 34, the grout conveying channel of the right spindle, the grout injection pipe II to reach the mold, after the grouting is completed, the mold is accelerated to rotate, after the product in the mold is formed, the motor stops working, the heating pipe in the incubator stops working, the hydraulic cylinder moves to the right, loosens the right spindle, the ejection shaft at both ends of the mold pushes the expansion rod I in sequence, so that the mold is separated from the left baffle and the right baffle, then the switch door of the incubator is opened, the manipulator transfers the mold from the incubator to the bracket II on the mold table, after the mold reaches the target position on the bracket II, it is cooled for a period of time, then the ejection shaft at one end of the mold works to push the product in the mold, and the product is pushed out from the other end of the mold.

[0066] Because the pushing forces of the hydraulic cylinder of the right spindle, the ejection shaft pushing rod I and the ejection shaft pushing rod II are different, the mold is not fixed when it is on the mold table and the bracket in the incubator, and it is convenient for work, and it is also convenient for automation or semi-automation work.

[0067] The automation process is described as follows: if the same size mold is used, the PLC controls the switch door on the incubator to open, then the PLC controls the manipulator to carry the mold placed on the mold table into the bracket I in the incubator, then the PLC controls the power device to push the right spindle to move towards the mold, the mold is connected with the left baffle and the right baffle on the left spindle and the right spindle, after the connection, the power device still pushes the right spindle to be compressed (i.e. to be compressed to the left) towards the mold, since the mold touches the travel switch, the travel switch sends a signal to the PLC to determine that the mold position has been in place, the PLC controls the switch door on the incubator to close, controls the heating tube in the incubator to start working, the temperature sensor in the incubator sends a temperature signal to the PLC, when the temperature in the incubator reaches the target temperature, the PLC controls the heating of the heating tube to incubate the incubator, and controls the motor to drive the left spindle to rotate, thereby driving the mold in the incubator to rotate, at the same time, the PLC controls the valve of the grouting pipe I to open, to grout in the mold, the slurry passes through the grouting port 34, the slurry conveying channel of the right spindle, the grouting pipe II to reach the mold, after the grouting is completed, the PLC controls the valve of the grouting pipe I to close, to stop grouting, the PLC adjusts the rotating speed of the left fixed shaft, the mold accelerates to rotate for a period of time, the product in the mold is formed, then the PLC controls the motor to stop working, controls the heating tube in the incubator to stop working, controls the switch door of the incubator to open, controls the hydraulic cylinder to move to the right to loosen the right spindle, controls the ejection shaft at both ends of the mold to push the extension rod I in sequence to make the mold separate from the left baffle and the right baffle, then controls the manipulator to carry the mold from the incubator to the bracket II on the mold table, after the mold reaches the target position on the bracket II, the position sensor or the travel switch II on the mold table sends a signal to the PLC, the mold is cooled for a period of time, then the PLC controls the ejection shaft at one end of the mold to work to push the product in the mold to be pushed out from the other end of the mold.

[0068] The preferred embodiments of the present application are described above, but the present application is not limited to the embodiments, and the protection scope of the present application is not limited to the above. The technical features of the above-described embodiments can be combined arbitrarily, and for the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not contradict each other or cannot be implemented, it should be considered that the combinations of the technical features are within the scope of the present application. It should be noted that, for those skilled in the art and any person skilled in the art, the technical solutions and the concept of the present application can be replaced or changed equivalently without departing from the overall concept of the present application and the spirit of the principle of the present application, and some changes and improvements made by them should be considered as the protection scope of the present application.

Claims

1. A centrifugal forming machine for MC pipe, characterized in that: The utility model provides a kind of mould and forming machine, including cylindrical mould (1), left baffle (2) and right baffle (3) are respectively arranged at the both ends of mould, left baffle (2) and right baffle (3) are respectively fixedly connected with mould (1) by ring-shaped recess (4) and ring-shaped insert plate (5) of suitable size, ring-shaped recess (4) and ring-shaped insert plate (5) are equipped with sealing pad, left baffle (2) is fixedly connected with rotating power device for driving mould to rotate, right side of mould is equipped with right main shaft (32), rotating sleeve (33) is connected on right main shaft (32) by bearing, rotating sleeve (33) is fixedly connected with right baffle (3);Right main shaft is equipped with power device for driving right main shaft axial movement to right; Right main shaft (32) center is equipped with slurry delivery channel, slurry delivery channel is communicated with grouting pipe I (36) and grouting opening (34) or grouting device, right baffle center is opened with communicating hole, communicating hole center is equipped with grouting pipe II, communicating hole and grouting pipe II are gap matched, grouting pipe II one end communicates slurry delivery channel, other end extends into mould center; Mould outside is equipped with heating device; Mould (1) both ends periphery is fixedly connected with annular push plate (10), mould both ends are also equipped with ejection axial telescopic rod I (11) that can be along with the one-way of mould axial push annular push plate (10), ejection axial telescopic rod I (11) respectively correspond the annular push plate (10) of mould both ends.

2. The MC pipe centrifugal forming machine of claim 1, wherein: Ejection axial telescopic rod I (11) is the push rod of hydraulic cylinder II, the push rod of pneumatic cylinder II or electric push rod II.

3. The MC pipe centrifugal forming machine of claim 1, wherein: Left baffle (2) center is fixedly connected with left main shaft (21), left baffle (2) is connected rotating power device by left main shaft (21).

4. The MC pipe centrifugal forming machine of claim 1, wherein: It also includes forming machine frame (7), heat preservation box (6), heat preservation box (6) is arranged on forming machine frame (7), and heat preservation box (6) is equipped with bracket I (60) for placing mould in, and heating device (61) is arranged below bracket I (60), and heat preservation box (6) is equipped with switch door (62) for the mould in and out; Left fixed shaft and left fixed shaft pass through hole I are set up on heat preservation box, and left fixed shaft and left fixed shaft are gap matched with heat preservation box or rotatablely connected by bearing; Heat preservation box is also equipped with through hole II for ejection axial telescopic rod I (11) to pass through.

5. The MC tube centrifugal forming machine of claim 4, wherein: Heat preservation box is equipped with exhaust port (63).

6. The MC tube centrifugal forming machine of claim 4, wherein: The side of forming machine frame is equipped with mould table (8) for placing mould and manipulator (9), and mould table (8) is equipped with bracket II (82) for placing mould, and manipulator (9) carries mould between bracket II (82) and bracket I; Bracket II (82) one end is equipped with ejection axial telescopic rod II (80), and ejection axial telescopic rod II is installed with push plate (81) for pushing product in mould, and push plate (81) is correspondingly arranged with product in mould placed on mould table (8).

7. The MC tube centrifugal forming machine of claim 6, wherein: Ejection axial telescopic rod II (80) is the push rod of hydraulic cylinder III, the push rod of pneumatic cylinder III or electric push rod III.

8. The MC pipe centrifugal forming machine of claim 6, wherein: Rotating power device is variable speed motor, and manipulator, switch door, ejection axial telescopic rod I, ejection axial telescopic rod II and variable speed motor are connected with PLC respectively, and the work of manipulator, ejection axial telescopic rod I, ejection axial telescopic rod II and variable speed motor is controlled by PLC; The temperature sensor is connected with the PLC, the heating device (61) is connected with the PLC, and the PLC adjusts the heating temperature by controlling the heating power of the heating device.

9. The MC pipe centrifugal forming machine of claim 8, wherein: A flow sensor (37) is arranged on the grouting pipe I (36), and the flow sensor is connected with the PLC; a valve (38) is arranged on the grouting pipe I (36), the valve is an electric valve or a pneumatic valve, and the valve is connected with the PLC and controlled by the PLC to open or close.

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