A shaping device for a thermos bottle shell and a shaping method thereof

Abstract

This invention relates to the field of thermos bottle shell processing technology, and discloses a shaping device and method for thermos bottle shells. The device includes a base, on which a guide plate, clamping components, and a feeding component are mounted. The guide plate is fixed in the middle of the base. Two sets of clamping components are symmetrically distributed along the guide plate, and the two sets cooperate to form a cylindrical slot. Clamping blocks are movably mounted on the clamping components, pressing the cylindrical shell. One end of the guide plate has a groove; the groove's feeding end communicates with the feeding component, and the groove's discharging end communicates with the cylindrical slot. This invention utilizes two telescopic rods that extend simultaneously. Two upper clamping blocks and two lower clamping blocks form a cylindrical slot. As the moving blocks continue to move, under the action of friction, rollers drive a disc-shaped seat to rotate within the thermos bottle's metal shell, thereby achieving the rounding of the recessed area.

Description

Technical Field

[0001] This invention relates to the field of thermos bottle shell processing equipment, specifically to a shaping device and method for thermos bottle shells. Background Technology

[0002] Thermos bottles are an indispensable item in people's daily lives. The outer shell of existing thermos bottles is made of materials such as bamboo weaving, plastic, iron sheet, aluminum, and stainless steel. Due to the sturdiness and durability of metal, it is the most widely used material for existing thermos bottles.

[0003] The existing thermos bottle shell consists of a bottle cap, a top cover, a bottle body, and a handle. The metal bottle body is made from a flat metal plate. During transportation, the thermos bottle shell is easily deformed. Generally, it is rolled with a ball or hammered with a cylinder to make it round. This method has the following disadvantages: low shaping efficiency and unsatisfactory shaping effect. Summary of the Invention

[0004] The purpose of this invention is to provide a shaping device and method for the outer shell of a thermos bottle, so as to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0006] This invention relates to a shaping device and method for the outer shell of a thermos bottle, comprising a base, on which a guide plate, a clamping assembly, and a feeding assembly are mounted. The guide plate is fixed in the middle of the base. The clamping assembly consists of two sets, which are symmetrically distributed along the guide plate and cooperate with each other to form a cylindrical slot. A clamping block is movably mounted on the clamping assembly, and the clamping block presses against the cylindrical shell. One end of the guide plate is provided with a groove, the feeding end of which is connected to the feeding assembly, and the discharging end of which is connected to the cylindrical slot.

[0007] Furthermore, the clamping assembly includes an upper clamping seat and a lower clamping seat. An upper clamping block is installed at the telescopic end of the upper clamping seat, and a lower clamping block is installed at the telescopic end of the lower clamping seat. The upper clamping block and the lower clamping block are joined together to form a cylindrical slot in the plate.

[0008] Furthermore, a plurality of rectangular grooves are provided at the end of the lower clamping block near the other lower clamping block, and the rectangular grooves provided on the two lower clamping blocks are staggered.

[0009] Furthermore, the lower clamp includes a base plate and a stand. The base plate is fixed to the base with bolts, and the stand is fixed to the base plate with bolts. The stand has a cuboid structure. One end of the stand has a rectangular hole through it. A rectangular block and a sliding block are installed in the rectangular hole. A spring is installed between the rectangular block and the sliding block. A fastening screw corresponding to the rectangular block is installed on the outside of the stand. The fastening screw presses the rectangular block. One end of the rectangular block has a through hole. A connecting tube is installed in the end of the through hole near the outside of the stand. One end of the sliding block has a through hole. A needle tube is installed in the through hole near the end of the through hole near the rectangular block. The end of the needle tube is fitted into the through hole by a sleeved sealing sleeve. At the same time, a limit ring is sleeved on the end of the needle tube. The end of the needle tube is closed, and a round hole is through the outer surface of the end of the needle tube.

[0010] Furthermore, one end of the sliding block extends out of the rectangular hole, and the extended end of the sliding block is fixed to the back of the lower clamping block. An arc-shaped groove is provided on the clamping surface of the lower clamping block. The through hole communicates with the arc-shaped groove, and the opening of the arc-shaped groove is closed by a cover plate. A tube body communicating with the arc-shaped groove is installed on the side of the lower clamping block.

[0011] Furthermore, the lower clamping seat includes a foot and a telescopic rod. The telescopic rod is installed on the foot, and an upper clamping block is fixed to the telescopic end of the telescopic rod. Limiting plates are installed on both sides of the upper clamping block. The foot is fixed to the upper surface of the stand. A rectangular strip is fixed to the upper surface of the stand, and the upper clamping block moves along the rectangular strip.

[0012] Furthermore, the feeding assembly includes a base, a motor, and a pushing assembly. The base is fixed on the base plate, and the pushing assembly is installed inside the base. The motor is installed on the outside of the base and is connected to the pushing assembly in a transmission manner. A guide hole is provided on one side plate of the base, and the guide hole is connected to the feeding end of the groove. At the same time, the telescopic end of the pushing assembly moves to one side of the groove through the guide hole.

[0013] Furthermore, the pushing assembly includes a threaded rod and a smooth rod. The threaded rod and the smooth rod are installed parallel to each other between two side plates close to each other in the base. A moving block is fitted on the threaded rod and the smooth rod. A push rod is vertically installed in the middle of the moving block. A disc-shaped seat is installed at the end of the push rod. Several inclined grooves are opened on the peripheral side of the disc-shaped seat. Long grooves are opened on the opposite two sides of the inclined grooves. A shaft is installed between two long grooves. A spring is installed in the long groove to push the shaft to move outward. A roller is installed on the shaft.

[0014] Furthermore, a guide plate is installed inside the discharge end of the base, and the guide plate is connected to the guide hole.

[0015] A method for shaping the outer shell of a thermos bottle includes the following steps:

[0016] Step 1: Convey the metal shell of the thermos bottle that needs to be shaped to one side of the guide plate, and the material falls into the guide plate;

[0017] Step 2: The metal shell of the thermos pushes the two lower clamping blocks installed to move outward, thereby enabling the lower clamping blocks to push the sliding block to compress the spring. When the lower clamping blocks reach their maximum contraction, the two lower clamping blocks form a semi-cylindrical slot, and the metal shell of the thermos is completely located inside the lower clamping blocks.

[0018] Step 3: By extending the two telescopic rods simultaneously, the two upper clamping blocks and the two lower clamping blocks form a cylindrical slot. As the moving block continues to move, the roller drives the disc-shaped seat to rotate inside the metal shell of the thermos bottle under the action of friction, thereby rounding the recessed part.

[0019] The present invention has the following beneficial effects:

[0020] (1) In this invention, the metal shell of the thermos bottle is completely located inside the lower clamping block. When the two telescopic rods extend simultaneously, the two upper clamping blocks form a semi-cylindrical slot at the maximum extension. At the same time, the two upper clamping blocks and the two lower clamping blocks form a cylindrical slot. The position of the metal shell of the thermos bottle is limited by the limiting plate to prevent the metal shell of the thermos bottle from sliding out. As the sliding block continues to move, the disc-shaped seat and the installed roller are inserted into the metal shell of the thermos bottle. Under the action of friction, the roller drives the disc-shaped seat to rotate inside the metal shell of the thermos bottle, thereby realizing the rounding of the recessed part.

[0021] (2) The end of the metal shell of the thermos bottle of the present invention contacts the chamfered surface of the lower clamping block, thereby pushing the two installed lower clamping blocks to move outward, thereby realizing that the lower clamping block pushes the sliding block to compress the spring, realizing that the through hole on the outer side of the end of the needle tube is connected with the through hole, so that the heated steam enters the arc groove through the needle tube to heat the metal shell of the thermos bottle, which is convenient for shaping.

[0022] (3) The feeding assembly of the present invention conveys the metal shell of the thermos bottle that needs to be shaped to one side of the feeding plate. Since the upper end of the feeding plate is a funnel-shaped opening, it is easy to make the metal shell of the thermos bottle fall down, thereby driving the sliding block to move towards the side closer to the guide plate. The disc-shaped seat fixed at the end of the upper shaft of the sliding block and the installed roller push the end of the metal shell of the thermos bottle to move along the groove into the cylindrical slot formed by the clamping assembly, which is convenient for feeding.

[0023] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a partial schematic diagram of the present invention;

[0027] Figure 3 This is a schematic diagram of the clamping assembly structure of the present invention;

[0028] Figure 4 This is a partial structural diagram of the clamping assembly of the present invention;

[0029] Figure 5 For the present invention Figure 4 A schematic diagram of the cross-sectional structure;

[0030] Figure 6 This is a schematic diagram of the support structure of the present invention;

[0031] Figure 7 This is a schematic diagram of the feeding assembly structure of the present invention;

[0032] Figure 8 This is a bottom view of the feeding assembly of the present invention;

[0033] Figure 9 This is a schematic diagram of the disc-shaped seat structure of the present invention;

[0034] Figure 10 This is a schematic diagram of the cross-sectional structure of the disc-shaped seat of the present invention;

[0035] Figure 11 This is a schematic diagram of the method of the present invention;

[0036] The attached diagram lists the components represented by each number as follows:

[0037] In the diagram: 1. Base; 2. Guide plate; 201. Groove; 3. Clamping assembly; 301. Base plate; 302. Stand; 3021. Fastening screw; 3022. Rectangular hole; 3023. Rectangular strip; 303. Rectangular block; 3031. Through hole; 3032. Sealing sleeve; 3033. Connecting tube; 304. Sliding block; 3041. Through hole; 3042. Needle tube; 3043. Limiting ring; 305. Lower clamping block; 3051. Tube body; 3052. Cover plate; 30 53. Arc-shaped groove; 306. Foot; 307. Telescopic rod; 308. Upper clamping block; 3081. Limiting plate; 309. Spring 1; 4. Base; 401. Guide hole; 5. Motor; 6. Pushing assembly; 601. Threaded rod; 602. Smooth rod; 603. Moving block; 604. Push rod; 605. Disc seat; 6051. Inclined groove; 6052. Long groove; 6053. Spring 2; 6054. Connecting seat; 606. Roller; 607. Shaft; 7. Guide plate. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Example 1

[0040] Please see Figures 1-10 As shown, the present invention is a shaping device for the outer shell of a thermos bottle, including a base 1, on which a guide plate 2, a clamping assembly 3 and a feeding assembly are installed. The guide plate 2 is fixed in the middle of the base 1. The clamping assembly 3 is provided in two sets, which are symmetrically distributed along the guide plate 2. The two sets of clamping assemblies 3 cooperate with each other to form a cylindrical slot. A clamping block is movably installed on the clamping assembly 3, and the clamping block squeezes the cylindrical shell. One end of the guide plate 2 is provided with a groove 201. The feeding end of the groove 201 is connected to the feeding assembly, and the discharging end of the groove 201 is connected to the cylindrical slot.

[0041] The clamping assembly 3 includes an upper clamping seat and a lower clamping seat. An upper clamping block 308 is installed on the telescopic end of the upper clamping seat, and a lower clamping block 305 is installed on the telescopic end of the lower clamping seat. The upper clamping block 308 and the lower clamping block 305 are spliced ​​together to form a cylindrical slot in the plate.

[0042] Several rectangular slots are provided on the end of the lower clamping block 305 near the other lower clamping block 305, and the rectangular slots on the two lower clamping blocks 305 are staggered.

[0043] The lower clamp includes a base plate 301 and a stand 302. The base plate 301 is fixed to the base 1 by bolts, and the stand 302 is fixed to the base plate 301 by bolts. The stand 302 is a cuboid structure, with a rectangular hole 3022 extending through one end. A rectangular block 303 and a sliding block 304 are installed in the rectangular hole 3022. A spring 309 is installed between the rectangular block 303 and the sliding block 304. A fastening screw 3021 corresponding to the rectangular block 303 is installed on the outside of the stand 302. The fastening screw 3021 presses the rectangular block 303. A through hole 3031 is provided at one end of block 303. A connecting tube 30333 is installed in the end of the through hole 3031 near the outer side of the stand 302. A through hole 3041 is provided at one end of sliding block 304. A needle tube 3042 is installed in the end of the through hole 3041 near the rectangular block 303. The end of the needle tube 3042 is fitted in the through hole 3031 through a sleeved sealing sleeve 3032. At the same time, a limit ring 3043 is sleeved on the end of the needle tube 3042. The end of the needle tube 3042 is closed. A round hole is provided on the outer side of the end of the needle tube 3042.

[0044] One end of the sliding block 304 extends out of the rectangular hole 3022. The extended end of the sliding block 304 is fixed to the back of the lower clamping block 305. An arc-shaped groove 3053 is provided on the clamping surface of the lower clamping block 305. The through hole 3041 communicates with the arc-shaped groove 3053. The opening of the arc-shaped groove 3053 is closed by the cover plate 3052. A tube 3051 communicating with the arc-shaped groove 3053 is installed on the side of the lower clamping block 305.

[0045] The lower clamping seat includes a foot 306 and a telescopic rod 307. The telescopic rod 307 is installed on the foot 306. An upper clamping block 308 is fixed to the telescopic end of the telescopic rod 307. Limiting plates 3081 are installed on both sides of the upper clamping block 308. The foot 306 is fixed to the upper surface of the upright 302. A rectangular strip 3023 is fixed to the upper surface of the upright 302. The upper clamping block 308 moves along the rectangular strip.

[0046] The feeding assembly includes a base 4, a motor 5, and a pushing assembly 6. The base 4 is fixed on the base 1. The pushing assembly 6 is installed inside the base 4. The motor 5 is installed on the outside of the base 4. The motor 5 is connected to the pushing assembly 6 for transmission. A guide hole 401 is opened on one side plate of the base 4. The guide hole 401 is connected to the feeding end of the groove 201. At the same time, the telescopic end of the pushing assembly 6 moves to the side of the groove 201 through the guide hole 401.

[0047] The pushing assembly 6 includes a threaded rod 601 and a smooth rod 602. The threaded rod 601 and the smooth rod 602 are installed parallel to each other between two side plates close to each other in the base 4. A moving block 603 is installed on the threaded rod 601 and the smooth rod 602. A push rod 604 is vertically installed in the middle of the moving block 603. A disc-shaped seat 605 is installed at the end of the push rod 604. Several inclined grooves 6051 are opened on the peripheral side of the disc-shaped seat 605. Long grooves 6052 are opened on the opposite two sides of the inclined grooves 6051. A shaft 607 is installed between two long grooves 6052. A spring 6053 that pushes the shaft 607 to move outward is installed in the long groove 6052. A roller 606 is installed on the shaft 607.

[0048] A guide plate 7 is installed inside the discharge end of the base 4, and the guide plate 7 is connected to the guide hole 401.

[0049] In use, the feeding component conveys the metal shell of the thermos bottle that needs to be shaped to one side of the guide plate 7. Since the upper end of the guide plate 7 has a funnel-shaped opening, it is easy to make the metal shell of the thermos bottle fall down.

[0050] Start motor 5, motor 5 drives threaded rod 601 to rotate forward, thereby driving moving block 603 to move closer to guide plate 2. The disc-shaped seat 605 fixed at the end of shaft 607 on moving block 603 and the installed roller 606 push the end of the metal shell of thermos bottle along groove 201 into the cylindrical slot formed by clamping assembly 3.

[0051] The outer diameter of the disc-shaped seat 605 is smaller than the inner diameter of the metal shell of the thermos bottle, and the outer diameter formed by the several annularly distributed rollers 606 is larger than the inner diameter of the metal shell of the thermos bottle.

[0052] The end of the metal shell of the thermos bottle contacts the chamfered surface of the lower clamping block 305, thereby pushing the two installed lower clamping blocks 305 to move outward. This allows the lower clamping blocks 305 to push the sliding block 304 to compress the spring 309, so that the circular hole through the outer side of the end of the needle tube 3042 is connected to the through hole 3031. This allows the heated steam to enter the arc-shaped groove 3053 through the needle tube 3042. The steam passing through the arc-shaped groove 3053 is discharged through the tube body 3051. When the lower clamping block 305 reaches its maximum contraction, the two lower clamping blocks 305 form a semi-cylindrical groove.

[0053] The metal shell of the thermos bottle is completely inside the lower clamping block 305. When the two telescopic rods 307 extend simultaneously, the two upper clamping blocks 308 form a semi-cylindrical slot at the maximum extension. At the same time, the two upper clamping blocks 308 and the two lower clamping blocks 305 form a cylindrical slot. The position of the metal shell of the thermos bottle is limited by the limiting plate 3081 to prevent the metal shell of the thermos bottle from sliding out. As the moving block 603 continues to move, the disc-shaped seat 605 and the installed roller 606 extend into the metal shell of the thermos bottle. Under the action of friction, the roller 606 drives the disc-shaped seat 605 to rotate inside the metal shell of the thermos bottle, thereby rounding the recessed part.

[0054] Example 2

[0055] Please see Figure 11 As shown, a shaping method for the outer shell of a thermos bottle includes the following steps:

[0056] Step 1: The metal shell of the thermos bottle that needs to be shaped is conveyed to one side of the guide plate 7, and the material falls into the guide plate 7;

[0057] Step 2: The metal shell of the thermos pushes the two lower clamping blocks 305 installed to move outward, thereby enabling the lower clamping blocks 305 to push the sliding block 304 to compress the spring. When the lower clamping blocks 305 reach the maximum contraction, the two lower clamping blocks form a semi-cylindrical slot, and the metal shell of the thermos is completely located inside the lower clamping blocks 305.

[0058] Step 3: By extending the two telescopic rods 307 simultaneously, the two upper clamping blocks 308 and the two lower clamping blocks 305 form a cylindrical slot. As the moving block 603 continues to move, the roller 606 drives the disc seat 605 to rotate inside the metal shell of the thermos bottle under the action of friction, thereby rounding the recessed part.

[0059] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A shaping device for the outer shell of a thermos bottle, comprising a base (1), characterized in that: The base (1) is equipped with a guide plate (2), a clamping assembly (3) and a feeding assembly; The guide plate (2) is fixed in the middle of the base (1). The clamping assembly (3) is provided in two sets. The two clamping assemblies (3) are symmetrically distributed along the guide plate (2). The two clamping assemblies (3) cooperate with each other to form a cylindrical slot. The guide plate (2) has a groove (201) at one end. The feed end of the groove (201) is connected to the feed assembly, and the discharge end of the groove (201) is connected to the cylindrical slot. The clamping assembly (3) includes an upper clamping seat and a lower clamping seat. An upper clamping block (308) is installed on the telescopic end of the upper clamping seat, and a lower clamping block (305) is installed on the telescopic end of the lower clamping seat. The upper clamping block (308) and the lower clamping block (305) are joined together to form a cylindrical slot; The lower clamp includes a base plate (301) and a stand (302). The base plate (301) is fixed to the base (1) by bolts, and the stand (302) is fixed to the base plate (301) by bolts. The stand (302) has a cuboid structure, and a rectangular hole (3022) is passed through one end of the stand (302). A rectangular block (303) and a sliding block (304) are installed inside the rectangular hole (3022). A spring (309) is installed between the rectangular block (303) and the sliding block (304). A fastening screw (3021) corresponding to the rectangular block (303) is installed on the outside of the stand (302). The fastening screw (3021) presses the rectangular block (303) tightly. The rectangular block (303) has a through hole (3031) at one end, and a connecting pipe (3033) is installed in the end of the through hole (3031) near the outside of the base (302). One end of the sliding block (304) has a through hole (3041), and a needle tube (3042) is installed at the end of the through hole (3041) near the rectangular block (303). The end of the needle tube (3042) is fitted in the through hole (3031) through a sleeved sealing sleeve (3032), and a limit ring (3043) is sleeved on the end of the needle tube (3042). The end of the needle tube (3042) is closed, and a round hole is penetrating the outer surface of the end of the needle tube (3042); One end of the sliding block (304) extends out of the rectangular hole (3022), and the extended end of the sliding block (304) is fixed to the back of the lower clamping block (305); An arc-shaped groove (3053) is provided on the clamping surface of the lower clamping block (305). The through hole (3041) communicates with the arc-shaped groove (3053). The opening of the arc-shaped groove (3053) is closed by a cover plate (3052). A tube (3051) communicating with the arc-shaped groove (3053) is installed on the side of the lower clamping block (305). The end of the metal shell of the thermos bottle contacts the chamfered surface of the lower clamp (305), thereby pushing the two installed lower clamps (305) to move outward, so that the lower clamp (305) pushes the sliding block (304) to compress the spring (309), so that the circular hole through the outer side of the end of the needle tube (3042) is connected with the through hole (3031), so that the heated steam enters the arc groove (3053) through the needle tube (3042), and the steam passing through the arc groove (3053) is discharged through the tube body (3051).

2. The shaping device for the outer shell of a thermos bottle according to claim 1, characterized in that: The lower clamping block (305) has several rectangular slots at its end near the other lower clamping block (305); The rectangular slots on the two lower clamping blocks (305) are staggered.

3. A shaping device for the outer shell of a thermos bottle according to claim 2, characterized in that: The lower clamp includes a foot (306) and a telescopic rod (307). The telescopic rod (307) is installed on the foot (306), and the telescopic end of the telescopic rod (307) is fixed with an upper clamp (308). Limiting plates (3081) are installed on both sides of the upper clamping block (308); The foot (306) is fixed on the upper surface of the stand (302), and a rectangular strip (3023) is fixed on the upper surface of the stand (302). The upper clamp (308) moves along the rectangular strip.

4. A shaping device for the outer shell of a thermos bottle according to claim 3, characterized in that: The feeding assembly includes a base (4), a motor (5), and a pushing assembly (6), wherein the base (4) is fixed on the base (1); A push assembly (6) is installed inside the base (4), and a motor (5) is installed on the outside of the base (4). The motor (5) is connected to the push assembly (6) in a transmission connection. A guide hole (401) is provided on one side plate of the base (4). The guide hole (401) is connected to the feed end of the groove (201) and simultaneously pushes the telescopic end of the component (6) to move towards the side of the groove (201) through the guide hole (401).

5. A shaping device for the outer shell of a thermos bottle according to claim 4, characterized in that: The pushing assembly (6) includes a threaded rod (601) and a smooth rod (602). The threaded rod (601) and the smooth rod (602) are installed between two side plates that are close to each other in the base (4). A moving block (603) is installed on the threaded rod (601) and the smooth rod (602). A push rod (604) is vertically installed in the middle of the moving block (603). A disc seat (605) is installed at the end of the push rod (604). The disc-shaped seat (605) has several inclined grooves (6051) on its peripheral side. Each of the two opposite sides of the inclined groove (6051) has a long groove (6052). A shaft (607) is installed between two long grooves (6052). A spring (6053) is installed in the long groove (6052) to push the shaft (607) to move outward. A roller (606) is installed on the shaft (607).

6. A shaping device for the outer shell of a thermos bottle according to claim 5, characterized in that: A guide plate (7) is installed inside the discharge end of the base (4), and the guide plate (7) is connected to the guide hole (401).

7. A method for shaping the outer shell of a thermos flask, applicable to the shaping device for the outer shell of a thermos flask as described in claim 6, characterized in that: Includes the following steps: Step 1: The metal shell of the thermos bottle that needs to be shaped is conveyed to one side of the guide plate (7), and the material falls into the guide plate (7); Step 2: The metal shell of the thermos pushes the two lower clamping blocks (305) installed to move outward, thereby realizing that the lower clamping blocks (305) push the sliding block (304) to compress the spring. When the lower clamping blocks (305) reach the maximum contraction, the two lower clamping blocks form a semi-cylindrical slot, and the metal shell of the thermos is completely located inside the lower clamping blocks (305). Step 3: By extending the two telescopic rods (307) simultaneously, the two upper clamping blocks (308) and the two lower clamping blocks (305) form a cylindrical slot. As the moving block (603) continues to move, the roller (606) drives the disc seat (605) to rotate inside the metal shell of the thermos bottle under the action of friction, thereby realizing the rounding of the recessed part.

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