Forming drum

Abstract

The present invention provides a forming drum, including a turn-up rod, wherein there are multiple turn-up rods, the first end of the turn-up rod has a turn-up position located above the flat drum, and an initial position located between the guide section and the first drive seat; the second drive seat is movably sleeved on the main shaft, the second end of the turn-up rod is pivotally connected to the second drive seat, and the second drive seat moves along the axial direction of the main shaft. When the forming drum of the present invention is working, the expansion and contraction of the flat drum can be realized by the movement of the drive shaft, the lifting and recovery of the guide rod can be realized by the movement of the first drive seat, and the turn-up action of the turn-up rod can be completed by the coordinated movement of the second drive seat with the first drive seat, so as to realize the turn-up of the material on the steel ring, wherein the first drive seat, the second drive seat and the drive shaft can all be controlled by a servo motor, so that the bonding of the rubber material and the turn-up of the steel ring can be completed on one drum, which greatly improves the production efficiency and ensures the quality of the air spring.

Description

Technical Field

[0001] The invention relates to the technical field of air spring manufacturing equipment, in particular to a forming drum. Background Art

[0002] In the existing air spring forming equipment, the drum used in the secondary process is mainly used, and the realization of most functions requires manual assistance.

[0003] The drum used in the secondary process needs to position the large and small steel rings separately, which can easily cause deformation of the tire embryo and affect the quality of the air spring. In addition, most of the actions in the secondary process need to be completed manually, resulting in low production efficiency and poor product quality. The secondary molding process has low fitting accuracy, low degree of automation, and excessive manual intervention, which seriously affects molding quality and production efficiency. Summary of the invention

[0004] The main purpose of the present invention is to provide a forming drum to solve the problem of poor production efficiency of the forming drum in the prior art.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a forming drum, comprising: a main shaft; a driving shaft, which is installed in the main shaft and is movable along the axial direction of the main shaft; a flat drum, which comprises a plurality of drum petals, which are arranged along the circumference of the flat drum, and the plurality of drum petals are all connected to the driving shaft, and the driving shaft can drive the drum petals to approach or move away from the main shaft along its axial movement, and the material is partially wound on the flat drum; a turn-up mechanism, which comprises a plurality of disc petals and a plurality of guide rods, which are arranged along the circumference of the turn-up mechanism, and the plurality of disc petals and the plurality of guide rods are arranged one by one, and the first end of the disc petal is pivotally connected to the drum petal, and the first end of the guide rod is pivotally connected to the drum petal. Connected to the second end of the disc petal, the first end of the guide rod is provided with a guide section; a first drive seat, the first drive seat is movably mounted on the main shaft, the second end of the guide rod is pivoted to the first drive seat, the first drive seat moves along the axial direction of the main shaft, and can drive one end of the guide rod away from or close to the main shaft; a turn-up rod, there are multiple turn-up rods, the first end of the turn-up rod has a turn-up position above the flat drum, and an initial position between the guide section and the first drive seat; a second drive seat, the second drive seat is movably mounted on the main shaft, the second end of the turn-up rod is pivoted to the second drive seat, and the second drive seat moves along the axial direction of the main shaft.

[0006] Furthermore, the forming drum also includes a supporting plate portion, which includes a plurality of plate petals, a clearance gap is formed between two adjacent plate petals, and a plurality of turn-up rods are correspondingly inserted into the plurality of clearance gaps.

[0007] Furthermore, the forming drum also includes a driving structure, a first end of the driving structure is pivotally connected to the driving shaft, and a second end of the driving structure is pivotally connected to the drum petal.

[0008] Furthermore, the forming drum also includes a driving boss, the driving boss is connected to the driving shaft, and the first end of the driving structure is pivotally connected to the driving boss.

[0009] Furthermore, the forming drum also includes a guide boss and a guide frame, the guide boss is fixed on the main shaft, the guide frame is fixed on the bottom of the drum petal, a guide cavity is arranged inside the guide boss, the guide cavity extends radially along the main shaft, both sides of the guide frame are adapted to the inner wall of the guide cavity, and are movably installed in the guide cavity.

[0010] Furthermore, the support plate portion is movably arranged along the axial direction of the main shaft, and the support plate portion has a covering position and a yielding position. When the first end of the turn-up rod is in the initial position, the support plate portion can move to the top of the first end of the turn-up rod for covering.

[0011] Furthermore, the first driving seat includes a first seat body and a second seat body, the first seat body is sleeved in the middle of the main shaft, the guide rod is pivotally connected to the first seat body, the second seat body is sleeved at the end of the main shaft away from the flat drum, and the first seat body and the second seat body are connected by a connecting rod.

[0012] Furthermore, the distance from the pivot axis of the guide rod and the first seat body to the axis of the main shaft is smaller than the distance from the pivot axis of the guide rod and the disc petal to the axis of the main shaft.

[0013] Furthermore, the second driving seat is arranged between the first seat body and the second seat body, the connecting rod is parallel to the main axis, and a clearance hole is arranged on the second driving seat, and the connecting rod is passed through the clearance hole.

[0014] Furthermore, the guide rod includes a rod body and a guide section arranged at the end of the rod body. A guide surface is arranged on the top of the rod body. The guide surface gradually inclines from the direction from the flat drum to the first drive seat toward the direction close to the main shaft. The turn-up rod is pivotally connected to the second drive seat. When the first end of the turn-up rod is in the initial position, the first end of the turn-up rod rests on the guide surface.

[0015] By applying the technical solution of the present invention, when the forming drum of the present invention is working, the expansion and contraction of the flat drum can be realized by the movement of the driving shaft, the lifting and recovery of the guide rod can be realized by the movement of the first driving seat, and the reverse packing action of the reverse packing rod can be completed by the coordinated movement of the second driving seat and the first driving seat, so as to realize the reverse packing of the material on the steel ring, wherein the first driving seat, the second driving seat and the driving shaft can all be controlled by a servo motor, so that the bonding of the rubber material and the reverse packing of the steel ring can be completed on one drum, which greatly improves the production efficiency and ensures the quality of the air spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 The internal structure diagram of the embodiment of the forming drum of the present invention when in the initial state is schematically shown;

[0018] Figure 2 The external structure diagram of an embodiment of a forming drum of the present invention is schematically shown;

[0019] Figure 3 The internal structure diagram of the embodiment of the forming drum of the present invention when the flat drum is in an expanded state is schematically shown;

[0020] Figure 4 The internal structure diagram of the embodiment of the present invention when the guide rod of the forming drum is lifted is schematically shown;

[0021] Figure 5 A schematic diagram of the internal structure of an embodiment of the forming drum of the present invention when the turn-up rod is turned up;

[0022] Figure 6 A schematic diagram of the internal structure of an embodiment of the forming drum of the present invention when the turn-up rod is retracted is shown;

[0023] Figure 7 A schematic diagram of the internal structure of an embodiment of the present invention when the guide rod and the turn-up rod of the forming drum are both reset;

[0024] Figure 8 A schematic diagram of the internal structure of an embodiment of the present invention when the cover plate of the forming drum is reset is shown;

[0025] Fig. 9 A cross-sectional view schematically shows an embodiment of a forming drum of the present invention;

[0026] Fig.10 The structural diagram of an embodiment of the turn-up rod of the forming drum of the present invention when turned up is schematically shown.

[0027] The above drawings include the following reference numerals:

[0028] 1. Flat drum; 11. Drum petal; 12. Driving structure; 13. Driving boss; 14. Guide boss; 15. Guide frame; 16. Guide cavity; 2. Turn-up mechanism; 21. Disc petal; 22. Guide rod; 3. Support plate; 31. Plate petal; 4. Turn-up rod; 41. Roller; 5. Main shaft; 6. First driving seat; 61. First seat body; 62. Second seat body; 63. Connecting rod; 7. Second driving seat. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] As described in the background technology, the existing air spring molding equipment mainly uses the drum used in the secondary process, and most of the functions require manual assistance. The drum used in the secondary process needs to position the large and small steel rings separately, which can easily cause the tire embryo to deform and affect the quality of the air spring. In addition, most of the actions in the secondary process need to be completed manually, resulting in low production efficiency and poor product quality. The secondary molding process has low fitting accuracy, low degree of automation, and excessive manual intervention, which seriously affects the molding quality and production efficiency.

[0031] To solve the above problems, see Figures 1 to 10As shown, an embodiment of the present invention provides a forming drum, and the forming drum of this embodiment includes a main shaft 5, a driving shaft, a flat drum 1, a turn-up mechanism 2, a first driving seat 6, a turn-up rod 4 and a second driving seat 7, wherein the driving shaft is installed in the main shaft 5 and is movable along the axial direction of the main shaft 5; the flat drum 1 includes a plurality of drum petals 11, and the plurality of drum petals 11 are arranged along the circumference of the flat drum 1, and the plurality of drum petals 11 are all connected to the driving shaft, and the driving shaft can drive the drum petals 11 to move closer to or away from the main shaft 5 along its axial movement, and the material is partially wound on the flat drum 1; the turn-up mechanism 2 includes a plurality of disc petals 21 and a plurality of guide rods 22, and the plurality of disc petals 21 are arranged along the circumference of the turn-up mechanism 2, and the plurality of disc petals 21 and the plurality of guide rods 22 are arranged one by one, and the first end of the disc petal 21 is pivotally connected to the drum petal. 11, the first end of the guide rod 22 is pivoted to the second end of the disc petal 21, and the first end of the guide rod 22 is provided with a guide section; the first drive seat 6 is movably mounted on the main shaft 5, and the second end of the guide rod 22 is pivoted to the first drive seat 6. The first drive seat 6 moves along the axial direction of the main shaft 5, and can drive one end of the guide rod 22 away from or close to the main shaft 5; there are multiple turn-up rods 4, and the first end of the turn-up rod 4 has a turn-up position located above the flat drum 1, and an initial position located between the guide section and the first drive seat 6; the second drive seat 7 is movably mounted on the main shaft 5, and the second end of the turn-up rod 4 is pivoted to the second drive seat 7. The second drive seat 7 moves along the axial direction of the main shaft 5, and combined with the action of the turn-up mechanism, it can drive the turn-up rod 4 to be close to or away from the main shaft 5. The material is wound around the flat drum and the reverse packaging mechanism. When the forming drum of the present invention is working, the expansion and contraction of the flat drum can be realized by the movement of the driving shaft, the lifting and recovery of the guide rod can be realized by the movement of the first driving seat, and the reverse packaging action of the reverse packaging rod can be completed by the coordinated movement of the second driving seat and the first driving seat, so as to realize the reverse packaging of the material on the steel ring. Among them, the first driving seat, the second driving seat and the driving shaft can all be controlled by a servo motor, so that the bonding of the rubber material and the reverse packaging of the steel ring can be completed on one drum, which greatly improves the production efficiency and ensures the quality of the air spring. Optionally, the servo motor is installed on an external control chassis.

[0032] When the material is being wound, the expansion of the flat drum can make the material tight and the wound material flatter. When unloading, the contraction of the flat drum can facilitate the unloading of the material.

[0033] Before the reverse-wrapping mechanism performs the reverse-wrapping action, there is a certain gap between the head end of the reverse-wrapping rod 4 and the head end of the guide rod. In order to prevent the material from being wrapped around the forming drum and collapsing from the gap, the forming drum in this embodiment also includes a support plate portion 3, and the support plate portion 3 includes a plurality of plate petals 31. A clearance gap is formed between two adjacent plate petals 31. The plurality of reverse-wrapping rods 4 are arranged in a one-to-one correspondence in the plurality of clearance gaps. The axial movement of the plurality of reverse-wrapping rods can be guided and limited by the plurality of clearance gaps to ensure the smoothness and accuracy of the movement of the reverse-wrapping rods. Among them, the support plate portion is movably arranged along the axial direction of the forming drum, and a driving cylinder is arranged inside the forming drum. The driving cylinder is drivingly connected to the plurality of plate petals to drive the support plate portion to move axially. When the forming drum is loaded with materials, the support plate portion can support the material in the gap between the head end of the reverse-wrapping rod and the head end of the guide rod to prevent the material from collapsing. In an optional embodiment, the supporting plate portion includes a sleeve, which is movably mounted on the main shaft, and a plurality of plate petals are arranged on the sleeve at intervals along the circumference of the sleeve. The extension direction of the plate petals is parallel to the axial direction of the sleeve. The driving cylinder is fixed on the main shaft, and the driving end of the driving cylinder is connected to the sleeve to realize the driving of the plurality of plate petals.

[0034] See also Figure 3 As shown, in order to realize the movement of the driving shaft while driving the drum petals to move closer to or away from the main shaft, thereby realizing the contraction or expansion of the flat drum, the forming drum in this embodiment further includes a driving structure 12, the first end of the driving structure 12 is pivotally connected to the driving shaft, and the second end of the driving structure 12 is pivotally connected to the drum petals 11. The driving structure 12 can be a driving column or a driving block, and each drum petal corresponds to at least one driving structure, and the drum petals are supported by the driving structure to expand the flat drum.

[0035] The forming drum in this embodiment further includes a driving boss 13, which is connected to the driving shaft, and the first end of the driving structure is pivotally connected to the driving boss 13. Specifically, a long hole extending along the axial direction of the main shaft can be opened at the corresponding position of the main shaft to provide a moving space for the driving boss, and also guide the movement of the driving boss.

[0036] See also Figure 3 As shown, the forming drum in this embodiment further includes a guide boss 14 and a guide frame 15, wherein the guide boss is fixed on the main shaft 5, and the guide frame is fixed on the bottom of the drum petal 11. A guide cavity 16 is arranged inside the guide boss, and the guide cavity extends along the radial direction of the main shaft 5. Both sides of the guide frame are adapted to the inner wall of the guide cavity 16, and are movably installed in the guide cavity 16. When the servo motor drives the driving shaft to move, the guide boss is driven to move, and then the driving structure is driven to move. Since the drum petal is limited in its axial movement by the cooperation of the guide frame and the guide boss, when the bottom of the driving structure moves, the top will push the drum petal upward, or pull the drum petal back.

[0037] The support plate portion 3 in this embodiment is movably arranged along the axial direction of the main shaft 5, and the support plate portion 3 has a covering position and a yielding position. When the first end of the turn-up rod 4 is in the initial position, the support plate portion 3 can move to the top of the first end of the turn-up rod 4 for covering. Among them, the support plate portion is movably arranged along the axial direction of the forming drum, and a driving cylinder is arranged inside the forming drum. The driving cylinder is drivingly connected with a plurality of plate petals to drive the support plate portion to move along the axial direction. When the forming drum is loaded, the support plate portion can support the material at the gap between the head end of the turn-up rod and the head end of the guide rod to prevent the material from collapsing. In an optional embodiment, the support plate portion includes a sleeve, which is movably sleeved on the main shaft, and a plurality of plate petals are arranged on the sleeve at intervals along the circumference of the sleeve, and the extension direction of the plate petals is parallel to the axial direction of the sleeve. The driving cylinder is fixed on the main shaft, and the driving end of the driving cylinder is connected to the sleeve to realize the driving of the plurality of plate petals and complete the switching between the covering position and the yielding position. A guide head is provided at the head end of the turn-up rod 4, and the size of the guide head is larger than the rod body of the turn-up rod. Therefore, when the support plate is in the covering position, the turn-up rod cannot be extended. A roller 41 is provided at the guide head to reduce the friction between the turn-up rod and the surface of the guide rod 22.

[0038] The first drive seat 6 in this embodiment includes a first seat body 61 and a second seat body 62, the first seat body 61 is sleeved in the middle of the main shaft 5, the guide rod 22 is pivotally connected to the first seat body 61, the second seat body 62 is sleeved at the end of the main shaft 5 away from the flat drum 1, and the first seat body 61 and the second seat body 62 are connected by a connecting rod 63. Among them, the first seat body and the second seat body are both disc-shaped structures and are coaxial with the main shaft, and there are multiple connecting rods, which are arranged at intervals along the circumference of the first seat body, and the driving of the first drive seat can be achieved through an external chassis.

[0039] In order to allow the end of the guide rod close to the flat drum to have an upward movement angle when the first seat body moves toward the flat drum, the distance from the pivot axis of the guide rod 22 and the first seat body 61 to the axis of the main shaft 5 in this embodiment is smaller than the distance from the pivot axis of the guide rod 22 and the disc petal 21 to the axis of the main shaft 5.

[0040] In order to make more reasonable use of the space of the forming drum, the second drive seat 7 in this embodiment is arranged between the first seat body 61 and the second seat body 62, the connecting rod 63 is parallel to the main shaft 5, and a clearance hole is provided on the second drive seat 7, and the connecting rod 63 is passed through the clearance hole.

[0041] Furthermore, the guide rod 22 in this embodiment includes a rod body and a guide section arranged at the end of the rod body, a guide surface is arranged at the top of the rod body, and the guide surface gradually tilts from the direction of the flat drum 1 to the first drive seat 6 toward the direction close to the main shaft 5, the turn-up rod 4 is pivotally connected to the second drive seat 7, and when the first end of the turn-up rod 4 is in the initial position, the first end of the turn-up rod 4 rests on the guide surface. When the first seat moves toward the direction close to the flat drum, the end of the guide surface close to the flat drum gradually rises, the second drive seat drives the turn-up rod to move toward the flat drum, and the guide surface guides the turn-up rod, so that the turn-up rod is extended to turn the steel ring.

[0042] The first end of the turn-up rod 4 in this embodiment is provided with a guiding cambered surface.

[0043] in, Figure 1 , Figures 3 to 8 The diagram shows the action changes of the forming drum when it is working. When the flat drum is working, it switches to the expansion state. The staff first wraps the material around the forming drum, and then controls the support plate to switch to the yielding position to increase the space for the turn-up rod to extend. Next, the first drive seat moves toward the flat drum, so that the guide rod is supported. Figure 4 As shown, during this process, relative movement occurs between the end of the turn-up rod and the guide rod, and then the second drive seat is controlled to move toward the direction close to the flat drum, so that the turn-up rod is extended outward and part of the material originally located thereon is turned up, so that this part of the material is wrapped on the steel ring originally sleeved on the surface of the material, thereby realizing the turning up of the steel ring.

[0044] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0045] When the forming drum of the present invention is working, the expansion and contraction of the flat drum can be realized by the movement of the driving shaft, the lifting and recovery of the guide rod can be realized by the movement of the first driving seat, and the reverse packing action of the reverse packing rod can be completed by the coordinated movement of the second driving seat and the first driving seat, so as to realize the reverse packing of the material on the steel ring. Among them, the first driving seat, the second driving seat and the driving shaft can all be controlled by a servo motor, so that the bonding of the rubber material and the reverse packing of the steel ring can be completed on one drum, which greatly improves the production efficiency and ensures the quality of the air spring.

[0046] It should be noted that the above detailed descriptions are illustrative and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0047] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0048] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example.

[0049] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, product, or apparatus.

[0050] For ease of description, spatially relative terms such as "on", "above", "on the upper surface of", "upper", etc. may be used herein to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figures. It should be understood that the spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures.

[0051] For example, if a device in a drawing is inverted, a device described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above" can encompass both "above" and "below." The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0052] In the above detailed description, reference is made to the accompanying drawings, which form a part of this document. In the accompanying drawings, similar symbols typically identify similar components unless the context indicates otherwise. The illustrated embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be used, and other changes may be made, without departing from the spirit or scope of the subject matter presented herein. It will be readily understood that aspects of the present disclosure, as generally described herein and illustrated in the accompanying drawings, may be arranged, substituted, combined, separated, and designed in a wide variety of different configurations, all of which are expressly contemplated herein.

[0053] The disclosure of the specific embodiments described in this application will not be limited, and it is intended to be illustrated as various aspects. As will be clear to those skilled in the art, many modifications and changes can be made without departing from the spirit and scope of the disclosure. Within the scope of the present disclosure, functionally equivalent methods and devices, in addition to those listed herein, will be clear to those skilled in the art from the foregoing description. Such modifications and changes are intended to fall within the scope of the appended claims. The disclosure will only be limited by the terms of the appended claims and the full scope of equivalents to which such claims are entitled. It will be understood that the disclosure is not limited to specific methods, reagents, compounds, compositions or biological systems, which can certainly vary. It will also be understood that the terms used herein are only for the purpose of describing specific embodiments, and are not intended to be restrictive.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A forming drum, It is characterized in that include: Spindle; A drive shaft, the drive shaft is installed in the main shaft and is movable along the axial direction of the main shaft; A flat drum, wherein the flat drum comprises a plurality of drum petals, the plurality of drum petals are arranged along the circumference of the flat drum, the plurality of drum petals are all drivingly connected to the driving shaft, the driving shaft can drive the drum petals to approach or move away from the main shaft along its axial movement, and the material is partially wound on the flat drum; A turn-up mechanism, the turn-up mechanism comprising a plurality of disc petals and a plurality of guide rods, the plurality of disc petals being arranged along the circumference of the turn-up mechanism, the plurality of disc petals and the plurality of guide rods being arranged in one-to-one correspondence, the first end of the disc petal being pivotally connected to the drum petal, the first end of the guide rod being pivotally connected to the second end of the disc petal, and the first end of the guide rod being provided with a guide section; A first driving seat, wherein the first driving seat is movably sleeved on the main shaft, the second end of the guide rod is pivotally connected to the first driving seat, and the first driving seat moves along the axial direction of the main shaft to drive one end of the guide rod away from or close to the main shaft; A turn-up rod, wherein the turn-up rod is multiple, and the first end of the turn-up rod has a turn-up position located above the flat drum, and an initial position located between the guide section and the first driving seat; A second driving seat, the second driving seat is movably sleeved on the main shaft, the second end of the turn-up rod is pivotally connected to the second driving seat, and the second driving seat moves along the axial direction of the main shaft; The forming drum further comprises a driving structure, a first end of the driving structure is pivotally connected to the driving shaft, and a second end of the driving structure is pivotally connected to the drum petal; The forming drum further comprises a driving boss, the driving boss is connected to the driving shaft, and the first end of the driving structure is pivotally connected to the driving boss; The forming drum also includes a guide boss and a guide frame, wherein the guide boss is fixed on the main shaft, and the guide frame is fixed on the bottom of the drum petal. A guide cavity is arranged inside the guide boss, and the guide cavity extends radially along the main shaft. Both sides of the guide frame are adapted to the inner wall of the guide cavity and are movably installed in the guide cavity.

2. The forming drum according to claim 1, It is characterized in that The forming drum also includes a supporting plate portion, which includes a plurality of plate petals, a clearance gap is formed between two adjacent plate petals, and a plurality of turn-up rods are correspondingly inserted into the plurality of clearance gaps.

3. The forming drum according to claim 2, It is characterized in that The support plate portion is movably arranged along the axial direction of the main shaft, and the support plate portion has a covering position and a yielding position. When the first end of the turn-up rod is in the initial position, the support plate portion can move to the top of the first end of the turn-up rod for covering.

4. The forming drum according to claim 1, It is characterized in that The first driving seat includes a first seat body and a second seat body, the first seat body is sleeved on the middle part of the main shaft, the guide rod is pivotally connected to the first seat body, the second seat body is sleeved on the end of the main shaft away from the flat drum, and the first seat body and the second seat body are connected by a connecting rod.

5. The forming drum according to claim 4, It is characterized in that The distance between the pivot axis of the guide rod and the first seat body and the axis of the main shaft is smaller than the distance between the pivot axis of the guide rod and the disc petal and the axis of the main shaft.

6. The forming drum according to claim 4, It is characterized in that The second driving seat is arranged between the first seat body and the second seat body, the connecting rod is parallel to the main axis, and a clearance hole is arranged on the second driving seat, and the connecting rod is passed through the clearance hole.

7. The forming drum according to claim 1, It is characterized in that The guide rod includes a rod body and the guide section arranged at the end of the rod body, a guide surface is arranged on the top of the rod body, and the guide surface is gradually inclined from the direction of the flat drum to the first driving seat toward the direction close to the main shaft, and the turn-up rod is pivotally connected to the second driving seat, and when the first end of the turn-up rod is in the initial position, the first end of the turn-up rod rests on the guide surface.

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