Steamer outer frame rounding shaping device and method

Abstract

The invention discloses a rounding and shaping device for a steamer outer frame, which comprises a frame, an inner ring rounding mechanism is arranged on the frame, and is used to tighten the steamer outer frame from the inside; an outer ring rounding mechanism matching the inner ring rounding mechanism is also arranged on the frame, and is used to squeeze the steamer outer frame from the outside; at least one of the inner ring rounding mechanism and the outer ring rounding mechanism is arranged as a diameter-changing device; a diameter-changing driving mechanism is also included, and is used to drive the diameter-changing device to deform; a temperature control device is arranged on the outer edge of the inner ring rounding mechanism and / or the inner edge of the outer ring squeezing mechanism, and is used to heat and shape the steamer outer frame. The invention can perform semi-automatic shaping operation on the steamer outer frame, has high production efficiency, and the obtained product has stable quality.

Description

Technical Field

[0001] The invention relates to steamer production equipment, in particular to a rounding and shaping device for a steamer outer frame. Background Art

[0002] Steamers are extremely widely used cooking utensils. Their structure mainly consists of a steamer frame and a base arranged at the bottom of the steamer frame. The steamer frame can be made of materials including bamboo, wood, and also metals such as stainless steel. Bamboo steamers are popular in the market because they are natural, environmentally friendly, low-cost, and lightweight. Bamboo is a vertically growing plant with good elasticity. After being split, peeled, and the pulp removed, the bamboo can be bent into a circular steamer frame and then shaped after high-temperature baking. In the prior art, the above rounding and shaping process is mainly performed manually, which has low production efficiency, high labor intensity for workers, and large variations in rounding rate. In addition, due to uneven control of baking temperature and baking location, the steamer is prone to mold. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a rounding and shaping device for a steamer outer frame, which can perform semi-automatic shaping operations on the steamer outer frame, has high production efficiency and stable product quality.

[0004] In order to solve the above technical problems, the rounding and shaping device for the outer frame of the steamer of the present invention includes a frame, on which an inner ring rounding mechanism is provided, which is used to tighten the outer frame of the steamer from the inside; the frame is also provided with an outer ring rounding mechanism matching the inner ring rounding mechanism, which is used to squeeze the outer frame of the steamer from the outside; at least one of the inner ring rounding mechanism and the outer ring rounding mechanism is configured as a diameter-changing device; and also includes a diameter-changing driving mechanism for driving the diameter-changing device to deform; the outer edge of the inner ring rounding mechanism and / or the inner edge of the outer ring extrusion mechanism are provided with a temperature control device, which is used to heat and shape the outer frame of the steamer.

[0005] It also includes a lifting mechanism for driving one of the inner ring rounding mechanism and the outer ring extrusion mechanism to move up and down in a vertical direction.

[0006] The inner ring rounding mechanism is configured as a variable diameter device, and the outer ring rounding mechanism is configured as a fixed diameter device. A specific implementation method includes: an inner support plate is provided on the frame; the inner ring rounding mechanism includes at least two fan-shaped tensioning blocks; the inner support plate is provided with at least two guide rails along its radial direction; the tensioning blocks are movably mounted on the inner support plate via the guide rails; the outer edges of the multiple tensioning blocks are combined to form a circumference; the outer ring rounding mechanism includes a calibrating ring provided on the frame; the calibrating ring is loosely fitted with the inner support plate; and the radius of the tensioning block is smaller than the radius of the inner support plate.

[0007] Implementation method 1 of the variable diameter drive mechanism: the variable diameter drive mechanism includes at least one stop rod arranged at the center of the inner support plate, and also includes a plurality of cylinders respectively fixed on the tensioning blocks, and the piston rods of the cylinders match the stop rods.

[0008] The second implementation method of the variable diameter drive mechanism: the variable diameter drive mechanism includes a vertical drive cylinder arranged in the center of the frame along the vertical direction, a through hole is provided in the center of the inner support plate, the piston rod of the vertical drive cylinder passes through the through hole and extends to the top of the tightening block, and also includes a plurality of connecting rods, one end of the connecting rod is fixedly connected to the piston rod of the vertical drive cylinder, and the other end is connected to the pin shaft of the tightening block.

[0009] The lifting mechanism includes vertical guide rails arranged on both sides of the frame, and also includes a power mechanism matching the vertical guide rails; a horizontally arranged outer support plate is provided between the vertical guide rails on both sides, and a through hole matching the inner support plate is cut in the center of the outer support plate, and the shaping ring is provided on the through hole of the outer support plate.

[0010] The inner ring rounding mechanism is configured as a sizing device, and the outer ring rounding mechanism is configured as a reducing device. A specific implementation method includes: the inner ring rounding mechanism includes a circular disc mounted on a frame; the outer ring rounding mechanism includes at least two circular rings and a guide device matching the circular rings, configured to drive the circular rings toward their centers; the reducing drive mechanism includes at least two outer circumferential cylinders fixedly connected to the circular rings and at least two outer circumferential push rods, wherein the outer circumferential push rods and the piston rods of the outer circumferential cylinders are located on the same radius as the center of the outer support plate; and the guide device and the outer circumferential cylinders are arranged in the same direction.

[0011] The present invention also provides a method for rounding and shaping the outer frame of a steamer, comprising the following steps:

[0012] Step A: The lifting mechanism operates, and the outer support plate rises or falls relative to the inner support plate, so that a height difference is generated between the inner support plate and the outer support plate;

[0013] Step B: The plurality of fan-shaped tensioning blocks are retracted toward the center along their guide rails. After the retraction is completed, the plurality of tensioning blocks are close to each other, forming circumferentially arranged shoulders on the inner support plate for fixing the outer frame of the steamer;

[0014] Step C, installing the preliminarily rounded outer frame of the steamer between the inner and outer ring rounding mechanisms;

[0015] Step D: The lifting mechanism operates until the outer support plate is flush with the inner support plate. At this time, the outer frame of the steamer is mounted on the sunken shoulder formed in step B. The inner side of the outer frame of the steamer is mounted on the outer circumference formed by the plurality of tensioning blocks. The outer side is restrained by the sizing ring, and the lower side of the outer frame of the steamer is supported by the inner support plate.

[0016] Step E: The variable diameter drive mechanism operates to drive the plurality of fan-shaped tensioning blocks to move outward along their guide rails until the outer edges of the tensioning blocks press against the outer frame of the steamer from the inside;

[0017] Step F, turning on the temperature control device to heat and shape the sides of the steamer outer frame from both the inside and outside; and unloading the material after the shape is maintained for a predetermined time at the set temperature.

[0018] The advantages of the present invention are:

[0019] A. The outer frame of the steamer can be baked at high temperature from both the inside and outside at the same time, and the inner and outer surfaces of the bamboo strips can be partially carbonized, thereby forming a dense surface protection layer that is not easy to deform or mold. The shaping temperature and shaping time can be accurately controlled, and the product quality is stable and highly consistent, which is conducive to mass production. B. The rounding and shaping of the outer frame of the steamer is partially automated, with high production efficiency and low manpower consumption. C. The present invention extrudes and shapes the outer frame of the steamer through a diameter-changing device, which is conducive to improving the physical properties of the product. D. The present invention provides solutions for the inner ring rounding mechanism and the outer ring rounding mechanism to be respectively set to fixed diameter or variable diameter, and provides a variety of diameter-changing drive devices, so that corresponding technical solutions can be adopted according to needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a top view of the first embodiment;

[0021] Figure 2 is a front view of the first embodiment;

[0022] Figure 3 It is a front view of the second embodiment;

[0023] Figure 4 It is a front view of embodiment 3;

[0024] Figure 5 It is a top view of the fourth embodiment.

[0025] Figure 6 It is a top view of the fifth embodiment. DETAILED DESCRIPTION

[0026] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0027] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5As can be seen, the present invention provides a device for rounding and shaping the outer frame of a steamer, comprising a frame 1, on which is provided an inner ring rounding mechanism for tightening the outer frame of the steamer from the inside; an outer ring rounding mechanism matching the inner ring rounding mechanism for squeezing the outer frame of the steamer from the outside; at least one of the inner ring rounding mechanism and the outer ring rounding mechanism is configured as a separate diameter-changing device; and a diameter-changing drive mechanism for driving the diameter-changing device to deform. Driven by the diameter-changing drive mechanism, the diameter of the diameter-changing device can be changed within a certain range, thereby allowing the diameter of the outer frame of the steamer to be changed according to process requirements during processing.

[0028] The outer edge of the inner ring rounding mechanism and / or the inner edge of the outer ring extrusion mechanism are provided with a temperature control device for heating and shaping the outer frame of the steamer. Various electric heating devices can be used to achieve the purpose of precise temperature control and timing.

[0029] During the heating and shape-maintaining process of the steamer frame, the inner ring rounding mechanism and the outer ring extrusion mechanism remain at the same height and concentrically. To facilitate loading, the steamer frame rounding and shaping device also includes a lifting mechanism for driving one of the inner ring rounding mechanism and the outer ring extrusion mechanism to rise and fall vertically. This vertical displacement of the inner ring rounding mechanism and the outer ring extrusion mechanism creates space for loading. Once loading is complete, the lifting mechanism returns to its original position.

[0030] Example 1

[0031] See also Figure 1 、 Figure 2 The steamer frame rounding and shaping device of this embodiment includes a frame 1, on which is mounted an inner ring rounding mechanism and an outer ring rounding mechanism matching the inner ring rounding mechanism. The inner ring rounding mechanism is configured as a diameter-changing device, while the outer ring rounding mechanism is configured as a diameter-fixing device. The device also includes a diameter-changing drive mechanism for driving the diameter-changing device to deform. Temperature control devices are provided along the outer edge of the inner ring rounding mechanism and the inner edge of the outer ring extrusion mechanism for heating and shaping the steamer frame. The device also includes a lifting mechanism for driving one of the outer ring extrusion mechanisms to rise and fall vertically.

[0032] An inner support plate 2 is provided on the frame 1, and the inner ring rounding mechanism includes three fan-shaped tightening blocks 30. Three guide rails 23 are provided on the inner support plate 2 along its radial direction, and the tightening blocks 30 are movably set on the inner support plate 2 through the guide rails 23; the outer edges of the three tightening blocks 30 are combined to form a circumference; the outer ring rounding mechanism includes a shaping ring 40 provided on the frame 1; the shaping ring 40 is clearance-fitted with the inner support plate 2, and the radius of the tightening block 30 is smaller than the radius of the inner support plate 2.

[0033] The variable diameter driving mechanism includes a stop rod 20 arranged at the center of the inner support plate 2 and a plurality of cylinders 31 respectively fixed on the tensioning blocks 30 , wherein the piston rods of the cylinders 31 match the stop rod 20 .

[0034] The lifting mechanism includes vertical guide rails 10 arranged on both sides of the frame 1, and also includes a power mechanism matching the vertical guide rails 10; a horizontally arranged outer support plate 4 is provided between the vertical guide rails 10 on both sides, and a through hole matching the inner support plate 2 is cut in the center of the outer support plate 4, and the shaping ring 40 is provided on the through hole of the outer support plate 4.

[0035] The working steps include:

[0036] Step A: The lifting mechanism works, and the outer supporting plate 4 rises relative to the inner supporting plate 2, so that a height difference is generated between the inner supporting plate 2 and the outer supporting plate 4, thereby facilitating the installation of the steamer outer frame 5.

[0037] In step B, the three fan-shaped tensioning blocks 30 are respectively retracted toward the center along their guide rails 23. After the retraction is completed, the several tensioning blocks 30 are close to each other, and the outer circumferential diameter formed by the whole is slightly smaller than the diameter of the inner support plate 2, that is, a circumferentially arranged sunken shoulder is formed on the inner support plate 2. The shoulder height is determined by the height of the tensioning blocks 30, and the shoulder width is determined by the difference between the diameter of the inner support plate 2 and the circumferential diameter formed by the several tensioning blocks 30. The sunken shoulder is used to fix the steamer outer frame 5. The shoulder width is slightly smaller than the thickness of the bamboo strips. In this embodiment, the shoulder width is set to 2-5 mm, which can be used to produce steamers with a wall thickness of 3-8 mm and a diameter of 50-80 cm.

[0038] Step C: Install the preliminarily rounded steamer outer frame 5 between the inner circle rounding mechanism and the outer circle rounding mechanism.

[0039] Method for initially rounding the outer frame of a steamer: Cut the bamboo into strips 1.5 to 5 cm wide, remove the green skin on the surface and the pulp on the back, and cut matching bevels at both ends; then bend the bamboo strips, roast them over fire to deform them, and then connect the ends together to form a initially rounded outer frame 5 of the steamer.

[0040] For ease of operation, the outer frame 5 of the steamer is embedded and installed in the circumference of the shaping ring 40 in an internal tensioning manner.

[0041] In step D, the lifting mechanism works, the outer support plate 4 is lowered until the outer support plate 4 is flush with the inner support plate 2. At this time, the steamer outer frame 5 is synchronously lowered and fitted on the sunken shoulder formed in step B, that is, the inner side of the steamer outer frame 5 is fitted on the outer circumference formed by several tensioning blocks 30, the outer side is limited by the sizing ring 40, and the lower side of the steamer outer frame 5 is partially supported by the inner support plate 2.

[0042] Step E: The diameter-changing drive mechanism works to press the steamer outer frame 5 from the inside.

[0043] In this embodiment, when the cylinder 31 is working and the piston rod of the cylinder 31 contacts the blocking rod 20 , the cylinder 31 drives the tensioning block 30 to expand radially, and the outer circumference of the tensioning block 30 presses the inner circumference of the steamer outer frame 5 .

[0044] Step F: Turn on the temperature control device to heat and shape the sides of the steamer frame from both the inside and outside.

[0045] In this embodiment, the temperature is controlled between 200°C and 400°C, and the setting time is 2 to 10 minutes. The material is unloaded after the predetermined time period of maintaining the shape at the set temperature has elapsed. The purpose of temperature control is: first, to set and maintain the shape at high temperature; second, to partially carbonize the surface of the steamer frame to form a protective layer. The temperature and time can be adjusted as needed.

[0046] In step B, the contraction of the tension block 30 can be done manually, or automatically if a return spring is provided on the guide rail pair. The guide rail pair between the tension block 30 and the inner support plate 2 and the return mechanism along the guide rail are not described in detail here.

[0047] In this embodiment, the temperature control device comprises multiple heating elements positioned along the edges of the inner ring rounding mechanism and the outer ring extrusion mechanism, evenly distributed along the circumference. It also includes a temperature sensing probe and a controller, which operate according to the set temperature. Because both the inner ring rounding mechanism and the outer ring extrusion mechanism are made of metal, which has excellent thermal conductivity, the overall temperature consistency of the forming area is high. The use of electric heating and controllers minimizes temperature errors.

[0048] Example 2

[0049] Compared with the first embodiment, the difference of this embodiment lies in the different arrangement of the variable diameter driving mechanism, and the resulting operating steps are also different.

[0050] See also Figure 1 、 Figure 3 In this embodiment, a through hole is provided at the center of the inner support plate 2, a conical rod 21 is movably provided in the through hole, and a curved surface is cut at the center of the multiple fan-shaped tightening blocks 30; the conical surface at the upper end of the conical rod 21 matches the curved surface of the tightening block 30.

[0051] The working steps are as follows:

[0052] Step A: The lifting mechanism works, and the outer support plate 4 rises relative to the inner support plate 2.

[0053] Step B, the tapered rod 21 rises to free up travel space at the center. Then the three fan-shaped tensioning blocks 30 are retracted toward the center along their guide rails.

[0054] Step C: Install the preliminarily rounded steamer outer frame 5 between the inner circle rounding mechanism and the outer circle rounding mechanism.

[0055] Step D: The lifting mechanism operates, and the outer support plate 4 descends until it is vertically aligned with the inner support plate 2.

[0056] Step E: The diameter-changing drive mechanism works to press the steamer outer frame 5 from the inside.

[0057] Specifically, a downward pulling force is applied to the conical rod 21, and the conical rod 21 applies pressure to the curved surface of the tensioning block 30 along the conical surface, driving the tensioning block 30 to move away from the center of the circle along its radial guide rail, so that multiple tensioning blocks 30 tighten the steamer outer frame from the inside.

[0058] Step F: Turn on the temperature control device to heat the sides of the steamer frame from both inside and outside to shape the steamer. After the shape is maintained at the set temperature for a predetermined time, unload the steamer.

[0059] Example 3

[0060] Compared with the first embodiment, the difference of this embodiment still lies in the different arrangement of the variable diameter driving mechanism.

[0061] See also Figure 1 、 Figure 4 In this embodiment, the variable diameter drive mechanism includes a vertical drive cylinder 6 arranged in the center of the frame 1 along the vertical direction, and a through hole is provided in the center of the inner support plate 2. The piston rod of the vertical drive cylinder 6 passes through the through hole and extends to the top of the tightening block 30. It also includes a plurality of connecting rods 61, one end of the connecting rod 61 is fixedly connected to the piston rod of the vertical drive cylinder 6, and the other end is pin-connected to the tightening block 30.

[0062] In this embodiment, the piston rod end of the vertical drive cylinder 6 is fixed to a connecting rod sleeve 60 by two upper and lower nuts. One end of the three connecting rods 61 is welded and fixed to the connecting rod sleeve 60, and the other end is pin-connected to the tensioning block 30. The connecting rod 61 is set at an angle of 15° to 75° away from the piston rod of the vertical drive cylinder 6, so that the vertical movement of the piston rod can be converted into horizontal movement of the tensioning block 30 along the guide rail 23.

[0063] The working steps are as follows:

[0064] Step A: The lifting mechanism works, and the outer support plate 4 rises relative to the inner support plate 2.

[0065] Step B: The vertical stretching cylinder 6 works, its piston rod rises, and the three fan-shaped tensioning blocks 30 shrink toward the center along their guide rails 23 respectively.

[0066] Step C: Loading the preliminarily rounded steamer outer frame 5 with materials.

[0067] Step D: The lifting mechanism works, and the outer support plate 4 is aligned vertically with the inner support plate 2.

[0068] Step E: The vertical stretching cylinder 6 works, and its piston rod is pulled down. The multiple pull rods 61 drive the tensioning blocks 30 to move away from the center of the circle along the guide rail, and the multiple tensioning blocks 30 press the steamer outer frame 5 from the inside.

[0069] Step F: Turn on the temperature control device to heat the sides of the steamer frame from both inside and outside to shape the steamer. After the shape is maintained at the set temperature for a predetermined time, unload the steamer.

[0070] Example 4

[0071] In the first, second and third embodiments, the inner ring rounding mechanism is configured as a diameter-changing device, and the outer ring rounding mechanism is configured as a diameter-fixing device. In this embodiment, the inner ring rounding mechanism is configured as a diameter-fixing device, and the outer ring rounding mechanism is configured as a diameter-changing device.

[0072] like Figure 5 It can be seen that the rounding and shaping device for the outer frame of the steamer in this embodiment includes a frame 1, on which an inner ring rounding mechanism is provided, and the frame 1 is also provided with an outer ring rounding mechanism matching the inner ring rounding mechanism; a diameter-changing device is provided in the outer ring rounding mechanism; and a diameter-changing driving mechanism is also included for driving the deformation of the diameter-changing device; a temperature control device is provided on the outer edge of the inner ring rounding mechanism and the inner edge of the outer ring extrusion mechanism for heating and shaping the outer frame of the steamer.

[0073] like Figure 5 It can be seen that the inner ring rounding mechanism includes a disc 22 arranged on the frame 1.

[0074] The outer ring rounding mechanism is set as one of the implementation methods of the variable diameter device: the outer ring rounding mechanism includes at least 2 sections of circular rings 41. In this embodiment, it is specifically set to 3 sections, and also includes a guiding device matching the circular ring 41, for driving the circular ring 41 to move toward its center direction; the variable diameter driving mechanism includes 3 outer circumferential cylinders 42 fixedly connected to the circular ring 41, and also includes 3 outer circumferential push rods 43. The piston rods of the outer circumferential push rods 43 and the outer circumferential cylinders 42 are located on the same radius as the center of the outer support plate 4; the guiding device is arranged in the same direction as the outer circumferential cylinder 42.

[0075] To improve work efficiency, this embodiment further includes a lifting mechanism for driving either the inner ring rounding mechanism or the outer ring extrusion mechanism to vertically elevate. The lifting mechanism includes vertical guide rails 10 disposed on either side of the frame 1 and a power mechanism adapted to operate in conjunction with the guide rails 10. A horizontally arranged outer support plate 4 is disposed between the two vertical guide rails 10. A through-hole is cut into the center of the outer support plate 4 to mate with the disc 22, and the sizing ring 40 is disposed in the through-hole of the outer support plate 4.

[0076] In order to facilitate loading, the edge of the disc 22 is cut into a disc shoulder 220 .

[0077] The working steps are as follows:

[0078] Step A: The lifting mechanism works, and the outer supporting plate 4 rises or falls relative to the disc 22.

[0079] Step B: The three sections of the ring are expanded radially to free up working space.

[0080] Step C: Install the preliminarily rounded outer frame of the steamer between the inner and outer ring rounding mechanisms.

[0081] Step D: The lifting mechanism works, and the outer supporting plate 4 is aligned vertically with the disc 22 .

[0082] Step E: The three outer circumferential cylinders 42 are activated, and their piston rods contact the outer circumferential push rods 43, causing the three ring segments 41 to radially contract and press against the outer side of the steamer frame. The inner side of the steamer frame presses against the side of the disc 22, with the lower edge of the steamer frame positioned on the upper surface of the disc's shoulder 220.

[0083] Step F: Turn on the temperature control device to heat the sides of the steamer frame from both inside and outside to shape the steamer. After the shape is maintained at the set temperature for a predetermined time, unload the steamer.

[0084] Example 5

[0085] In the first, second and third embodiments, the inner ring rounding mechanism is configured as a diameter-changing device, and the outer ring rounding mechanism is configured as a diameter-fixing device. In the fourth embodiment, the inner ring rounding mechanism is configured as a diameter-fixing device, and the outer ring rounding mechanism is configured as a diameter-changing device.

[0086] In this embodiment, both the inner ring rounding mechanism and the outer ring rounding mechanism are configured as diameter-changing devices and can still operate effectively.

[0087] Specifically, the steamer frame rounding and shaping device of this embodiment includes a frame 1, on which is mounted an inner ring rounding mechanism for tightening the steamer frame from the inside; an outer ring rounding mechanism matching the inner ring rounding mechanism for squeezing the steamer frame from the outside; both the inner and outer ring rounding mechanisms are provided with separate diameter reducing devices; and two sets of diameter reducing drive mechanisms matching the inner and outer ring rounding mechanisms, respectively. Temperature control devices are provided on the outer edge of the inner ring rounding mechanism and the inner edge of the outer ring squeezing mechanism for heating and shaping the steamer frame.

[0088] See also Figure 6As one specific implementation, in this embodiment, an inner support plate 2 is mounted on the frame 1. The inner ring rounding mechanism includes three fan-shaped tensioning blocks 30. Three guide rails 23 are radially disposed on the inner support plate 2. The tensioning blocks 30 are movably mounted on the inner support plate 2 via the guide rails 23. The outer edges of the three tensioning blocks 30 combine to form a circumference. The diameter-changing drive mechanism of the inner ring rounding mechanism is described in Examples 1, 2, and 3.

[0089] The outer ring rounding mechanism includes three sections of circular rings 41, and also includes a guiding device matching the circular rings 41, which is used to drive the circular rings 41 to move toward the center of the circle; the variable diameter driving mechanism corresponding to the outer ring rounding mechanism includes three outer circumferential cylinders 42 fixedly connected to the circular rings 41, and also includes three outer circumferential push rods 43, and the piston rods of the outer circumferential push rods 43 and the outer circumferential cylinders 42 are located on the same radius as the center of the outer support plate 4; the guiding device is arranged in the same direction as the outer circumferential cylinders 42.

[0090] In order to facilitate loading, a lifting device is also provided in this embodiment.

[0091] The working steps are as follows:

[0092] Step A: The lifting mechanism works, and the inner circle rounding mechanism and the outer circle rounding mechanism rise or fall relatively.

[0093] Step B: Acquire the working space by one of two methods: Method 1: The three segments of the outer ring rounding mechanism are radially expanded respectively; Method 2: The three fan-shaped tensioning blocks 30 of the inner ring rounding mechanism are radially contracted.

[0094] Step C: Install the preliminarily rounded outer frame of the steamer between the inner and outer ring rounding mechanisms.

[0095] Step D: The inner and outer ring rounding mechanisms of the lifting mechanism are aligned in the vertical direction.

[0096] Step E: The outer ring rounding mechanism's corresponding variable diameter drive mechanism operates, causing the three ring segments 41 to radially contract and press against the outer side of the steamer frame. The inner ring rounding mechanism's variable diameter drive mechanism operates, causing the three fan-shaped tensioning blocks 30 to radially expand, tightening the steamer frame from the inside.

[0097] Step F: Turn on the temperature control device to heat the sides of the steamer frame from both inside and outside to shape the steamer. After the shape is maintained at the set temperature for a predetermined time, unload the steamer.

[0098] It should be noted that in the above embodiment, the lifting mechanism drives the outer ring rounding mechanism to rise and fall vertically to facilitate operation. In the present invention, the lifting mechanism can also be used to drive the inner ring rounding mechanism to rise and fall vertically, still achieving the desired operation. Furthermore, if loading convenience is not a concern, the lifting mechanism can be omitted.

[0099] The specific implementation methods of the present invention include but are not limited to the above-mentioned embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but they still fall within the scope of protection of the present invention.

Claims

1. A device for rounding and shaping the outer frame of a steamer, comprising a frame (1), the frame (1) being provided with an inner ring rounding mechanism for tightening the outer frame of the steamer from the inside; the frame (1) being further provided with an outer ring rounding mechanism matching the inner ring rounding mechanism for squeezing the outer frame of the steamer from the outside; characterized in that: At least one of the inner ring rounding mechanism and the outer ring rounding mechanism is configured as a diameter-changing device; a diameter-changing driving mechanism is also included, which is used to drive the diameter-changing device to deform; a temperature control device is provided on the outer edge of the inner ring rounding mechanism and / or the inner edge of the outer ring extrusion mechanism, which is used to heat and shape the outer frame of the steamer; It also includes a lifting mechanism for driving one of the inner ring rounding mechanism and the outer ring rounding mechanism to rise and fall in a vertical direction; The inner ring rounding mechanism is configured as a diameter-changing device, and the outer ring rounding mechanism is configured as a diameter-fixing device; an inner support plate (2) is provided on the frame (1), the inner ring rounding mechanism comprises at least two fan-shaped tensioning blocks (30), at least two guide rails (23) are provided on the inner support plate (2) along its radial direction, and the tensioning block (30) is movably arranged on the inner support plate (2) via the guide rails (23); the outer edges of the plurality of tensioning blocks (30) are combined to form a circumference; the outer ring rounding mechanism comprises a shaping ring (40) provided on the frame (1); the shaping ring (40) is loosely matched with the inner support plate (2), and the radius of the tensioning block (30) is smaller than the radius of the inner support plate (2).

2. The rounding and shaping device for the outer frame of a steamer according to claim 1, characterized in that: The variable diameter drive mechanism comprises at least one blocking rod (20) arranged at the center of the inner support plate (2), and also comprises a plurality of cylinders (31) respectively fixed on the tensioning blocks (30), wherein the piston rods of the cylinders (31) match the blocking rod (20).

3. The rounding and shaping device for the outer frame of a steamer according to claim 1, characterized in that: The variable diameter drive mechanism comprises a vertical drive cylinder (6) arranged in the center of the frame (1) along the vertical direction, a through hole is arranged in the center of the inner support plate (2), the piston rod of the vertical drive cylinder (6) passes through the through hole and extends to the top of the tensioning block (30), and also comprises a plurality of connecting rods (61), one end of the connecting rod (61) is fixedly connected to the piston rod of the vertical drive cylinder (6), and the other end is connected to the pin shaft of the tensioning block (30).

4. The rounding and shaping device for the outer frame of a steamer according to claim 1, characterized in that: The lifting mechanism comprises vertical guide rails (10) arranged on both sides of the frame (1), and also comprises a power mechanism matching the vertical guide rails (10); a horizontally arranged outer support plate (4) is arranged between the vertical guide rails (10) on both sides, a through hole matching the inner support plate (2) is cut at the center of the outer support plate (4), and the shaped ring (40) is arranged on the through hole of the outer support plate (4).

5. A method for rounding and shaping the outer frame of a steamer using the device according to claim 4, comprising the following steps: Step A: the lifting mechanism is operated, and the outer support plate (4) is raised or lowered relative to the inner support plate (2), so that a height difference is generated between the inner support plate (2) and the outer support plate (4); Step B, the plurality of fan-shaped tensioning blocks (30) are respectively contracted toward the center along their guide rails. After the contraction is completed, the plurality of tensioning blocks (30) are close to each other to form a circumferentially arranged shoulder on the inner support plate (2) for fixing the steamer outer frame (5); Step C, installing the preliminarily rounded steamer outer frame (5) between the inner circle rounding mechanism and the outer circle rounding mechanism; Step D, the lifting mechanism works until the outer support plate (4) is flush with the inner support plate (2), at which time the steamer outer frame (5) is mounted on the sunken shoulder formed in step B, the inner side of the steamer outer frame (5) is mounted on the outer circumference formed by a plurality of tensioning blocks (30), the outer side is limited by the shaping ring (40), and the lower side of the steamer outer frame (5) is supported by the inner support plate (2); Step E: The variable diameter driving mechanism operates to drive the plurality of fan-shaped tensioning blocks (30) to move outward along their guide rails until the outer edges of the tensioning blocks press against the steamer outer frame (5) from the inside; Step F, turning on the temperature control device to heat and shape the sides of the steamer outer frame from both inside and outside; after the shape is maintained for a predetermined time at the set temperature, the material is unloaded.

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