A vacuum cup mouth spinning equipment

Abstract

This invention relates to the field of cup rim spinning technology, and discloses a cup rim spinning device for insulated cups, including a mounting frame, a rotating base, a horizontal plate, a first cylinder, a drive motor, a U-shaped bracket, and a spinning disc mounted on the mounting frame. It also includes a precision spinning mechanism disposed on the horizontal plate, comprising a fixed sleeve, an extrusion shaft slidably disposed within the fixed sleeve, and a pressure plate fixed to the extrusion shaft via a cross-shaped connecting plate. Through the cooperation of the extrusion shaft, pressure plate, pressure cap, first ball bearings, ring plate, and bushing, when the extrusion shaft presses down, the pressure plate and elastic element drive multiple first ball bearings at the bottom of the pressure cap to evenly abut against the ring plate, stably transmitting vertical pressure to the bushing and main shaft. This effectively reduces the deflection vibration of the main shaft during spinning, significantly improves the spinning accuracy of the spinning disc, and solves the problem of poor cup rim forming quality caused by insufficient main shaft accuracy in traditional equipment.

Description

Technical Field

[0001] This invention relates to the field of cup rim spinning technology, and more particularly to a cup rim spinning device for insulated cups. Background Technology

[0002] In the production of insulated cups, the cup rim spinning is a crucial process, as its quality directly affects the cup's seal, appearance, and user experience. Currently, commonly used cup rim spinning devices typically include a frame, a cup fixing assembly, a drive motor, and a rolling assembly. For example, existing technologies use spring clamps to hold the cup rim, and then use rollers to roll and shape the bottom or rim of the cup to achieve rim reduction or shaping. While these devices improve production efficiency to some extent, limitations in the clamping method and rolling structure often make it difficult to guarantee the precision and consistency of the cup rim spinning.

[0003] A thermos cup spinning device, disclosed in prior art document CN211161611U, includes a frame, a mounting bracket on the frame, a thermos cup fixing component, a third motor, a mounting block on the mounting bracket, and a rolling component on the mounting block. The rolling component includes a roller bracket with a roller shaft passing through it, and rollers connected to both ends of the roller shaft. The thermos cup fixing component includes a mold handle, which is fixed to the platform of the frame by a flange. A pull rod passes between the mold handle and the flange, with a spring clip at one end and a cylinder at the other end. A clamping head is fitted on the outside of the spring clip, and the bottom of the clamping head is connected to the mold handle. A pulley connects the third motor to the flange. The mouth of the thermos cup is squeezed into the spring clip, and the bottom of the thermos cup is located between two rollers. The device also includes a first telescopic component and a second telescopic component. This spinning device can improve welding accuracy, product qualification rate, and aesthetics. Although the aforementioned patent achieves the spinning forming of thermos cups by using spring clamps to hold the cup rim and rollers to roll it, it still has the following shortcomings: First, the device lacks an axial pre-tightening and vibration suppression structure for the main shaft or spinning components during the spinning process. When the equipment runs for a long time or at a high speed, the main shaft is prone to deflection vibration, resulting in uneven cup rim wall thickness and reduced roundness. Second, after spinning, the spring clamps and cup rim are prone to sticking or jamming, making it difficult to remove the material. Forced demolding can easily cause cup rim deformation or damage, affecting the product qualification rate. Third, the rolling assembly lacks dynamic balance support during operation, resulting in uneven pressure distribution and an inability to ensure uniform force on the circumference of the cup rim, thus limiting the molding quality. Summary of the Invention

[0004] This invention addresses the shortcomings of existing technologies, such as insufficient spinning precision, difficulty in unloading materials, and uneven pressure, by providing a spinning device for the mouth of a thermos cup.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a thermos cup mouth spinning device, comprising a mounting frame, a rotating base, a horizontal plate, a first cylinder, a drive motor, a U-shaped bracket, and a spinning plate mounted on the mounting frame, and further comprising: A precision spinning mechanism is provided on the horizontal plate, including a fixed sleeve, an extrusion shaft slidably disposed in the fixed sleeve, and a pressure plate fixed to the extrusion shaft via a cross joint plate. The pressure plate provides axial preload to the spinning disc under the drive of the extrusion shaft to reduce deflection vibration during the spinning process. A dynamic balancing mechanism is connected between the precision spinning mechanism and the spinning plate to maintain the dynamic balance of the spinning plate during the spinning process, preventing uneven pressure from affecting the cup mouth forming quality.

[0006] By adopting the above scheme, the pressing shaft is pressed down to drive the pressure plate to move, and an axial preload is applied to the spinning spindle, which effectively reduces the deflection vibration during the spinning process and improves the spinning accuracy.

[0007] Preferably, the precision spinning mechanism further includes a sleeve, a pressure cap, a ring plate, and a bushing; the sleeve is slidably fitted onto the outside of the pressure plate and passes through the horizontal plate; the pressure cap is elastically connected to the bottom of the pressure plate and slidably fitted onto the bottom of the sleeve; the ring plate is fixed to the bushing, and the bushing is slidably connected inside the sleeve and connected to the output end of the drive motor; the pressure cap is used to abut against the ring plate when the pressure plate is pressed down, thereby applying a stable vertical tension to the main shaft through the bushing, thus improving the spinning accuracy.

[0008] Using the above solution, the elastically connected gland can provide buffering and stable pressure transmission when the extrusion shaft is pressed down, avoiding rigid impact and ensuring uniform application of preload.

[0009] Preferably, the precision spinning mechanism further includes a plurality of first ball bearings, which are rotatably connected to the bottom of the pressure cap and abut against the ring plate together, for uniformly transmitting the vertical pressure of the pressure cap to the ring plate to ensure force balance.

[0010] By adopting the above scheme, multiple first balls evenly transmit pressure to the ring plate, so that the bushing and main shaft are subjected to balanced force, further reducing the main shaft runout and improving the stability of the spinning process.

[0011] Preferably, the main shaft is slidably connected to the lower side of the bushing, and its center is fixed to the spinning plate; the device also includes a base plate and a second cylinder, the bottom of the main shaft is rotatably connected to the base plate, and the output end of the second cylinder is fixed to the base plate, for driving the main shaft to move up and down, so as to achieve uniform spinning of different ranges of the cup opening.

[0012] With the above scheme, the spindle and the bushing are slidably connected, which not only ensures power transmission, but also allows the spindle to move up and down during the spinning process, so as to realize continuous processing of different heights of the cup mouth. The second cylinder drives the spindle to move up and down reciprocally through the base plate, so that the spinning plate can be uniformly spun along the height direction of the cup mouth, expanding the processing range and ensuring the consistency of wall thickness.

[0013] Preferably, the precision spinning mechanism further includes an arc-shaped protrusion, a spiral groove sleeve, an arc-grooved disc, and multiple bent push rods; the arc-shaped protrusion is fixed to the lower end of the extrusion shaft and movably abuts against the spiral groove sleeve; the spiral groove sleeve is drivenly connected to the arc-grooved disc; one end of the bent push rod is slidably connected to the arc groove of the arc-grooved disc, and the other end is fixedly connected to a cup mouth mold; when the extrusion shaft presses down, the arc-shaped protrusion drives the spiral groove sleeve to rotate, thereby driving the arc-grooved disc to rotate, causing the bent push rod to push the cup mouth mold outward, providing rigid support for the inner side of the cup mouth, and retracting after spinning to facilitate material removal.

[0014] The dynamic balancing mechanism includes a flat plate, a pair of telescopic rods, and a pair of retaining rings. The flat plate is fixed to the top of the base plate used for lifting and lowering the spinning spindle. The pair of telescopic rods are symmetrically fixed to the flat plate, and their rod bodies slide through the U-shaped bracket. The pair of retaining rings are symmetrically fixed to both sides of the spinning disc and abut against the ends of the pair of telescopic rods, respectively. This symmetrical abutment relationship prevents the spinning disc from loosening or deflecting during lifting, lowering, and rotating, ensuring uniform spinning pressure.

[0015] The dynamic balancing mechanism also includes a second ball bearing, which is rotatably connected to the end of the telescopic rod and abuts against the groove of the retaining ring. This ball bearing converts sliding friction into rolling friction, thereby reducing transmission resistance while ensuring balance.

[0016] Using the above scheme, the second ball rolls in the groove ring, converting sliding friction into rolling friction. Without hindering the rotation and lifting of the spinning disc, it effectively prevents the spinning disc from deflecting or shaking due to transmission clearance or uneven force, ensuring that the spinning pressure is applied evenly to the circumference of the cup mouth.

[0017] Preferably, the top of the fixing sleeve is provided with a vertical sliding groove, and the cross plate is slidably connected in the vertical sliding groove to guide and limit the vertical movement of the pressure plate.

[0018] Using the above scheme, when the arc groove plate rotates, it pushes the elbow push rod and the cup mouth mold to move radially through the arc groove, so as to achieve rigid support or shrinkage and unloading of the inner side of the cup mouth. The action is synchronous and precise. The plate moves up and down with the base plate, driving a pair of telescopic rods to move synchronously, providing symmetrical balance support for the spinning plate.

[0019] Preferably, the precision spinning mechanism further includes a protective shell, which is fixed to the fixed sleeve. The spiral groove sleeve rotatably passes through the protective shell, the arc groove disk is rotatably connected to the inner cavity of the protective shell, and the elbow push rod slides through the side wall of the protective shell. The protective shell is used to provide an installation base and protection for the internal transmission components.

[0020] Using the above solution, the telescopic rod passes through the U-shaped bracket to ensure its guiding accuracy during vertical movement and prevent skewing.

[0021] Preferably, the output end of the first cylinder is fixed to the top of the extrusion shaft to provide driving force for the precision spinning mechanism.

[0022] Using the above scheme, when the extrusion shaft presses down, it drives the spiral groove sleeve to rotate through the arc protrusion, converting the vertical linear motion into rotational motion, thus providing power for the opening and closing of the cup mold.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) By setting up a combination of structures such as an extrusion shaft, a pressure plate, a pressure cap, first balls, a ring plate and a bushing, the present invention achieves axial pre-tightening and vibration suppression of the spinning spindle. When the extrusion shaft is pressed down, the pressure plate and the elastic element drive multiple first balls at the bottom of the pressure cap to evenly abut against the ring plate, and stably transmit the vertical pressure to the bushing and the spindle, effectively reducing the deflection vibration of the spindle during the spinning process, significantly improving the spinning accuracy of the spinning disc, and solving the problem of poor cup forming quality caused by insufficient spindle accuracy in traditional equipment.

[0024] (2) By setting up a combination of structures such as arc protrusions, spiral sleeves, arc groove disks, elbow push rods and cup molds, the present invention achieves the synchronous opening and closing of the cup mold. When the extrusion shaft presses down, the spiral sleeves are driven to rotate by the arc protrusions, which in turn drives the arc groove disks to rotate, so that multiple elbow push rods and cup molds are synchronously opened outward in the radial direction, providing rigid support for the inner side of the cup. When resetting, the cup molds synchronously close inward, which facilitates material removal and ensures that the cup does not collapse or deform during the spinning process, and the material removal is smooth, effectively avoiding the defects of traditional equipment such as difficulty in material removal and damage to the cup.

[0025] (3) By setting up a combination of structures such as a flat plate, telescopic rod, second ball bearing and groove ring, the present invention achieves dynamic balance of the spinning plate during lifting and rotation. When the second cylinder drives the main shaft to move up and down, the base plate drives a pair of telescopic rods to move synchronously through the flat plate. The second ball bearing at the end of the telescopic rod always abuts against the groove rings that are symmetrically fixed on both sides of the spinning plate, converting sliding friction into rolling friction. Without hindering the movement of the spinning plate, it effectively prevents the deflection and shaking caused by the gap of the transmission system or uneven force, ensuring that the spinning pressure is evenly applied to the circumference of the cup mouth, further improving the consistency of cup mouth forming and surface smoothness. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram showing the structural fit between the spinning disc and the slotted ring of the present invention; Figure 3 This is a schematic diagram showing the structural fit between the fixing sleeve and the extrusion shaft of the present invention; Figure 4 For the present invention Figure 3 A magnified view of the structure at point A in the middle; Figure 5 For the present invention Figure 3 A magnified schematic diagram of the structure at point B in the middle; Figure 6 This is a schematic diagram showing the structural fit between the arc groove disk and the elbow push rod of the present invention; Figure 7 This is a schematic diagram showing the structural fit between the telescopic rod and the U-shaped bracket of the present invention; Figure 8 This is a schematic diagram showing the structural fit between the telescopic rod and the retaining ring of the present invention; Figure 9 This is a schematic diagram showing the structural fit between the second ball and the retaining ring of the present invention.

[0027] In the picture: 1. Mounting bracket; 2. Rotating base; 3. Horizontal plate; 4. First cylinder; 5. Drive motor; 6. U-shaped bracket; 7. Spinning plate; 8. Precision spinning mechanism; 810. Fixing sleeve; 820. Vertical slide groove; 830. Pressure plate; 840. Cup mold; 850. Protective shell; 860. Sleeve; 870. Pressure cap; 880. Ring plate; 890. Bushing; 8100. Main shaft; 8110. Base plate; 8120. Second cylinder; 8130. Cross joint plate; 8140. Extrusion shaft; 8150. First ball bearing; 8160. Spiral groove sleeve; 8170. Arc protrusion; 8180. Arc groove plate; 8190. Elbow push rod; 9. Dynamic balancing mechanism; 910. Telescopic rod; 920. Slotted ring; 930. Flat plate; 940. Second ball bearing. Detailed Implementation

[0028] 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. Example 1

[0029] like Figures 1 to 9As shown, the present invention provides a thermos cup mouth spinning device, including a mounting frame 1, a rotating base 2, a horizontal plate 3, a first cylinder 4, a drive motor 5, a U-shaped bracket 6, and a spinning plate 7 mounted on the mounting frame 1, and further including: a precision spinning mechanism 8, disposed on the horizontal plate 3, including a fixed sleeve 810, an extrusion shaft 8140 slidably disposed in the fixed sleeve 810, and a pressure plate 830 fixedly connected to the extrusion shaft 8140 through a cross plate 8130. Under the drive of the extrusion shaft 8140, the pressure plate 830 provides axial preload to the spinning plate 7 to reduce deflection vibration during the spinning process; and a dynamic balancing mechanism 9, connected between the precision spinning mechanism 8 and the spinning plate 7, used to maintain the dynamic balance of the spinning plate 7 during the spinning process to prevent uneven pressure from affecting the cup mouth forming quality.

[0030] like Figures 1 to 9 As shown, the precision spinning mechanism 8 also includes a sleeve 860, a pressure cap 870, an annular plate 880, and a bushing 890; the sleeve 860 is slidably sleeved on the outside of the pressure plate 830 and passes through the horizontal plate 3; the pressure cap 870 is elastically connected to the bottom of the pressure plate 830 and slidably sleeved on the bottom of the sleeve 860; the annular plate 880 is fixedly connected to the bushing 890, and the bushing 890 is slidably connected inside the sleeve 860 and connected to the output end of the drive motor 5; the pressure cap 870 is used to abut against the annular plate 880 when the pressure plate 830 is pressed down, thereby applying a stable vertical tension to the main shaft 8100 through the bushing 890, improving the spinning accuracy.

[0031] The above scheme employs the following: Mounting frame 1 supports the entire device, while rotating base 2 and horizontal plate 3 provide a stable foundation for the equipment. Drive motor 5 is connected to spinning disc 7 via bushing 890, providing power to main shaft 8100. In the precision spinning mechanism 8, the engagement of fixed sleeve 810 with extrusion shaft 8140 allows extrusion shaft 8140 to slide within it, while pressure plate 830 is fixed to extrusion shaft 8140 via cross joint 8130. The extrusion shaft 8140's drive applies axial preload to spinning disc 7, effectively reducing the deflection vibration of main shaft 8100. Dynamic balancing mechanism 9 is located between precision spinning mechanism 8 and spinning disc 7, ensuring the dynamic balance of spinning disc 7 during spinning, thereby preventing uneven pressure from affecting the forming quality of the cup mouth. Sleeve 860 is slidably fitted onto the outside of pressure plate 830 and passes through horizontal plate 3, while pressure cap 870 is elastically connected to the bottom of pressure plate 830 and slidably fitted onto the bottom of sleeve 860. Ring plate 880 is fixed to bushing 890, so that pressure cap 870 can abut against ring plate 880 when pressed down. Stable vertical tension is applied to main shaft 8100 through bushing 890, thereby improving spinning accuracy. The cooperation of this series of structures ensures the stability of the spinning process and the forming quality. Example 2

[0032] like Figures 3 to 7As shown, the precision spinning mechanism 8 also includes multiple first ball bearings 8150, which are rotatably connected to the bottom of the pressure cap 870 and abut against the ring plate 880 to evenly transmit the vertical pressure of the pressure cap 870 to the ring plate 880, ensuring force balance. The main shaft 8100 is slidably connected to the lower side of the bushing 890, and its center is fixed to the spinning disc 7. The device also includes a base plate 8110 and a second cylinder 8120. The bottom of the main shaft 8100 is rotatably connected to the base plate 8110, and the output end of the second cylinder 8120 is fixed to the base plate 8110 to drive the main shaft 8100 to move up and down, so as to achieve uniform spinning of different ranges of the cup opening. The precision spinning mechanism 8 also includes an arc-shaped protrusion 8. 170, a spiral groove sleeve 8160, an arc groove plate 8180, and multiple elbow push rods 8190; an arc protrusion 8170 is fixed to the lower end of the extrusion shaft 8140 and movably abuts against the spiral groove sleeve 8160; the spiral groove sleeve 8160 is connected to the arc groove plate 8180 in a transmission connection; one end of the elbow push rod 8190 is slidably connected to the arc groove of the arc groove plate 8180, and the other end is fixed to the cup mouth mold 840; when the extrusion shaft 8140 presses down, the spiral groove sleeve 8160 is driven to rotate through the arc protrusion 8170, which in turn drives the arc groove plate 8180 to rotate, causing the elbow push rod 8190 to push the cup mouth mold 840 outward to provide rigid support for the inner side of the cup mouth of the thermos, and to retract after spinning to facilitate unloading.

[0033] Using the above scheme: After the thermos cup is positioned, the first cylinder 4 is activated, pushing the extrusion shaft 8140 downwards along the inner cavity of the fixed sleeve 810. The extrusion shaft 8140 drives the pressure plate 830 to move downwards synchronously through the cross plate 8130. The elastic element at the bottom of the pressure plate 830, such as a spring, transmits pressure to the pressure cap 870. Multiple first ball bearings 8150 at the bottom of the pressure cap 870 contact the upper surface of the ring plate 880. Since the ring plate 880 is fixed to the bushing 890, this vertical pressure is transmitted to the main shaft 8100 through the bushing 890, thereby applying a stable axial preload to the rotating spinning disc 7. This preload effectively reduces the deflection vibration of the main shaft 8100 during the spinning process, significantly improving the spinning accuracy of the spinning disc 7. This design ensures the stability of the main shaft 8100 throughout the spinning process, resulting in a more consistent and reliable forming effect. Example 3

[0034] like Figures 7 to 9As shown, the dynamic balancing mechanism 9 includes a flat plate 930, a pair of telescopic rods 910, and a pair of retaining rings 920. The flat plate 930 is fixed to the top of the base plate 8110 used for lifting and lowering the spinning spindle 8100. The pair of telescopic rods 910 are symmetrically fixed to the flat plate 930, and their rod bodies slide through the U-shaped bracket 6. The pair of retaining rings 920 are symmetrically fixed to both sides of the spinning disc 7, and respectively abut against the ends of the pair of telescopic rods 910. This is used to prevent the spinning disc 7 from loosening or deflecting during lifting and rotating, and to ensure uniform spinning pressure through symmetrical abutment. The dynamic balancing mechanism 9 also includes a second ball bearing 940, which is rotatably connected to the end of the telescopic rod 910 and abuts against the groove of the retaining ring 920. This is used to reduce sliding friction. The friction is changed to rolling friction, which reduces transmission resistance while ensuring balance; the top of the fixed sleeve 810 is provided with a vertical sliding groove 820, and the cross plate 8130 is slidably connected in the vertical sliding groove 820 to guide and limit the vertical movement of the pressure plate 830; the precision spinning mechanism 8 also includes a protective shell 850, which is fixed to the fixed sleeve 810, the spiral groove sleeve 8160 rotatably passes through the protective shell 850, the arc groove plate 8180 is rotatably connected to the inner cavity of the protective shell 850, and the elbow push rod 8190 slidably passes through the side wall of the protective shell 850. The protective shell 850 is used to provide an installation base and protection for the internal transmission components; the output end of the first cylinder 4 is fixed to the top of the extrusion shaft 8140 to provide driving force for the precision spinning mechanism 8.

[0035] The above-mentioned scheme is adopted: During the spinning process, the second cylinder 8120 drives the main shaft 8100 to move up and down reciprocally within the bushing 890 via the base plate 8110, so that the spinning disc 7 continuously spins along the height direction of the cup rim. This up-and-down movement achieves uniform processing of different ranges of the cup rim, ensuring the overall quality of the cup rim. At the same time, the flat plate 930 fixed to the top of the base plate 8110 drives a pair of telescopic rods 910 to move up and down synchronously. The second ball bearings 940 at the ends of the telescopic rods 910 always abut against the symmetrically fixed groove rings 920 on both sides of the spinning disc 7. This symmetrical abutment structure converts sliding friction into rolling friction, effectively preventing the spinning disc 7 from deflecting or shaking due to transmission system gaps or uneven force without hindering the rotation and lifting of the spinning disc 7. This series of precise matching designs ensures that the spinning pressure is evenly applied to the circumference of the cup rim, further improving the consistency and surface finish of the cup rim forming, ensuring the high quality of the final product.

[0036] Working principle and usage process of this invention: First, the drive motor 5 is started. The output end of the drive motor 5 drives the bushing 890 to rotate, and the bushing 890 drives the main shaft 8100 and the spinning disc 7 fixed in the middle of the main shaft 8100 to rotate synchronously. At the same time, the rotating base 2 drives the thermos cup body to rotate, providing the basic rotational motion for the subsequent cup mouth spinning. At this time, the first cylinder 4 is in the initial state, the extrusion shaft 8140 is in the high position, and the cup mouth mold 840 is in the retracted state, which facilitates the insertion and positioning of the thermos cup.

[0037] Secondly, after the thermos cup is positioned, the first cylinder 4 is activated, and its output end pushes the extrusion shaft 8140 downward along the inner cavity of the fixed sleeve 810. The extrusion shaft 8140 drives the pressure plate 830 to move downward synchronously through the cross plate 8130. The elastic spring at the bottom of the pressure plate 830 transmits the pressure to the pressure cap 870, and multiple first ball bearings 8150 at the bottom of the pressure cap 870 abut against the upper surface of the ring plate 880. Since the ring plate 880 is fixed to the bushing 890, this vertical pressure is transmitted to the main shaft 8100 through the bushing 890, applying a stable axial preload to the rotating spinning disc 7, effectively reducing the deflection vibration of the main shaft 8100 during the spinning process, thereby significantly improving the spinning accuracy of the spinning disc 7.

[0038] Next, the extrusion shaft 8140 continues to move downwards, and the arc-shaped protrusion 8170 at its lower end contacts and presses downwards against the spiral sleeve 8160, forcing the spiral sleeve 8160 to rotate. The spiral sleeve 8160 drives the arc-groove disk 8180 inside the protective shell 850 to rotate. The arc-shaped groove on the arc-groove disk 8180 pushes multiple bent push rods 8190 to move radially outwards. The cup mouth mold 840, which is fixed to the end of the bent push rod 8190, then opens outwards and tightly abuts against the inner wall of the cup mouth. At this time, the cup mouth mold 840 provides rigid support for the cup mouth. In conjunction with the rotating base 2 driving the cup body to rotate and the spinning action of the spinning disk 7, the cup mouth begins to be uniformly spun and formed. Due to the internal support of the cup mouth mold 840, the cup mouth can be effectively prevented from collapsing or deforming inwards during the spinning process, ensuring that the cup mouth wall thickness is uniform and the roundness is good.

[0039] Specifically, during the spinning process, the second cylinder 8120 drives the main shaft 8100 to reciprocate up and down within the bushing 890 via the base plate 8110, thereby enabling the spinning disc 7 to continuously spin along the height direction of the cup rim, achieving uniform processing of different areas of the cup rim. Simultaneously, the flat plate 930 fixed to the top of the base plate 8110 drives a pair of telescopic rods 910 to move synchronously up and down. The second ball bearings 940 at the ends of the telescopic rods 910 always abut against the symmetrically fixed retaining rings 920 on both sides of the spinning disc 7. This symmetrical abutment structure converts sliding friction into rolling friction, effectively preventing the spinning disc 7 from deflecting or wobbling due to transmission system gaps or uneven force, without hindering the rotation and lifting of the spinning disc 7. This ensures that the spinning pressure is evenly applied to the circumference of the cup rim, further improving the consistency and surface finish of the cup rim forming.

[0040] Finally, after the spinning process is completed, the first cylinder 4 drives the extrusion shaft 8140 to return to its original position, the arc-shaped protrusion 8170 extrudes the spiral groove sleeve 8160 to rotate, and the arc groove plate 8180 rotates in the opposite direction under the action of the spiral groove sleeve 8160, driving the elbow push rod 8190 and the cup mouth mold 840 to retract inward, releasing the support on the inner side of the cup mouth. At the same time, the pressure plate 830 rises with the extrusion shaft 8140, the pressure cap 870 returns to its original position under the action of the elastic element, the first ball 8150 disengages from the ring plate 880, and the axial preload is eliminated. The second cylinder 8120 drives the main shaft 8100 and the spinning plate 7 to rise to the initial position, and the processed thermos cup can be easily removed from the rotating base 2, achieving smooth unloading. The entire process is completed through pure mechanical linkage, without the need for complex electrical control timing, and has the advantages of rapid response, stable operation, and smooth unloading, effectively solving the problems of cup mouth deformation, unloading difficulty, and uneven spinning pressure that are prone to occur in traditional spinning equipment.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A thermos cup mouth spinning device, comprising a mounting frame (1), a rotating base (2), a horizontal plate (3), a first cylinder (4), a drive motor (5), a U-shaped bracket (6), and a spinning plate (7) mounted on the mounting frame (1), characterized in that, Also includes: The precision spinning mechanism (8) is set on the horizontal plate (3) and includes a fixed sleeve (810), an extrusion shaft (8140) slidably set in the fixed sleeve (810), and a pressure plate (830) fixed to the extrusion shaft (8140) through a cross plate (8130). Under the drive of the extrusion shaft (8140), the pressure plate (830) provides axial preload to the spinning disc (7) to reduce deflection vibration during the spinning process. The dynamic balancing mechanism (9) is connected between the precision spinning mechanism (8) and the spinning plate (7) to maintain the dynamic balance of the spinning plate (7) during the spinning process and prevent uneven pressure from affecting the cup mouth forming quality.

2. The thermos cup mouth spinning device according to claim 1, characterized in that: The precision spinning mechanism (8) further includes a sleeve (860), a pressure cap (870), a ring plate (880), and a bushing (890); the sleeve (860) is slidably sleeved on the outside of the pressure plate (830) and passes through the horizontal plate (3); the pressure cap (870) is elastically connected to the bottom of the pressure plate (830) and slidably sleeved on the bottom of the sleeve (860); the ring plate (880) is fixed to the bushing (890), and the bushing (890) is slidably connected inside the sleeve (860) and connected to the output end of the drive motor (5); the pressure cap (870) is used to abut against the ring plate (880) when the pressure plate (830) is pressed down, thereby applying a vertical pulling force to the main shaft (8100) through the bushing (890).

3. The thermos cup mouth spinning device according to claim 2, characterized in that: The precision spinning mechanism (8) also includes a plurality of first balls (8150), which are rotatably connected to the bottom of the pressure cap (870) and together abut against the ring plate (880) to transmit the vertical pressure of the pressure cap (870) to the ring plate (880).

4. The thermos cup mouth spinning device according to claim 3, characterized in that: The main shaft (8100) is slidably connected to the lower side of the bushing (890), and its center is fixed to the spinning disc (7); the device also includes a base plate (8110) and a second cylinder (8120), the bottom of the main shaft (8100) is rotatably connected to the base plate (8110), and the output end of the second cylinder (8120) is fixed to the base plate (8110) for driving the main shaft (8100) to move up and down to achieve spinning of different ranges of the cup opening.

5. The thermos cup mouth spinning device according to claim 4, characterized in that: The precision spinning mechanism (8) further includes an arc-shaped protrusion (8170), a spiral groove sleeve (8160), an arc groove disk (8180), and multiple elbow push rods (8190); the arc-shaped protrusion (8170) is fixed to the lower end of the extrusion shaft (8140) and movably abuts against the spiral groove sleeve (8160); the spiral groove sleeve (8160) is connected to the arc groove disk (8180) in a transmission connection; one end of the elbow push rod (8190) is slidably connected to the arc groove of the arc groove disk (8180), and the other end is fixedly connected to a cup mold (840). When the extrusion shaft (8140) presses down, the spiral sleeve (8160) is driven to rotate by the arc protrusion (8170), which in turn drives the arc groove disk (8180) to rotate, causing the elbow push rod (8190) to push the cup mouth mold (840) outward to provide rigid support for the inner side of the cup mouth of the thermos cup, and to shrink after the extrusion is completed to facilitate material removal.

6. The thermos cup mouth spinning device according to claim 5, characterized in that: The dynamic balancing mechanism (9) includes a plate (930), a pair of telescopic rods (910) and a pair of retaining rings (920); the plate (930) is fixed to the top of the base plate (8110) for lifting the spinning spindle (8100); the pair of telescopic rods (910) are symmetrically fixed to the plate (930), and their rods slide through the U-shaped bracket (6); the pair of retaining rings (920) are symmetrically fixed to both sides of the spinning disc (7), and respectively abut against the ends of the pair of telescopic rods (910).

7. The thermos cup mouth spinning device according to claim 6, characterized in that: The dynamic balancing mechanism (9) further includes a second ball (940), which is rotatably connected to the end of the telescopic rod (910) and abuts against the groove of the retaining ring (920).

8. The thermos cup mouth spinning device according to claim 5, characterized in that: The top of the fixed sleeve (810) is provided with a vertical sliding groove (820), and the cross plate (8130) is slidably connected in the vertical sliding groove (820) to guide and limit the vertical movement of the pressure plate (830).

9. The thermos cup mouth spinning device according to claim 8, characterized in that: The precision spinning mechanism (8) also includes a protective shell (850), which is fixed to the fixed sleeve (810). The spiral groove sleeve (8160) rotates through the protective shell (850), the arc groove disk (8180) is rotatably connected to the inner cavity of the protective shell (850), and the elbow push rod (8190) slides through the side wall of the protective shell (850). The protective shell (850) is used to provide an installation base and protection for the internal transmission components.

10. The thermos cup mouth spinning device according to claim 9, characterized in that: The output end of the first cylinder (4) is fixed to the top of the extrusion shaft (8140) to provide driving force for the precision spinning mechanism (8).

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