Large glass fiber reinforced plastic cylinder forming die and rolling method

Abstract

The application discloses a large glass fiber reinforced plastic cylinder forming die and a rolling method, and relates to the glass fiber reinforced plastic forming technical field.The forming die comprises a die support, a fixed die, a sliding die and an adjusting device.The fixed die is fixed on the die support, and the fixed die has an arc-shaped concave first contact surface; the sliding die is arranged on the die support and is symmetrically arranged with the fixed die, and the sliding die has an arc-shaped concave second contact surface; and the first contact surface and the second contact surface jointly enclose a circular-arc-shaped die cavity; and the adjusting device is arranged between the sliding die and the die support to adjust the distance between the fixed die and the sliding die.The large glass fiber reinforced plastic cylinder forming die and the rolling method can adjust the size of the die, are suitable for the production of glass fiber reinforced plastic cylinders of various specifications, and have high utilization.

Description

Technical Field

[0001] This invention relates to the field of fiberglass molding technology, and in particular to a large fiberglass cylinder molding mold and rolling method. Background Technology

[0002] Fiberglass reinforced plastic (FRP) is a lightweight, high-strength fiber-reinforced plastic. The cylindrical forming process for FRP generally involves two methods: filament winding and hand lay-up. Both methods require a complete mold to constrain the FRP sheet, allowing it to be rolled into a cylindrical shape. Large FRP cylinder production necessitates large molds, and each mold set is only suitable for producing one type of cylinder. When dealing with small-batch, multi-variety FRP cylinder production, using these molds and methods becomes extremely inconvenient. The high cost and low utilization rate of large molds lead to high production costs. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a large fiberglass cylinder forming mold, the size of which can be adjusted, suitable for the production of fiberglass cylinders of various specifications, and with high utilization rate.

[0004] The present invention also proposes a method for rolling large fiberglass cylinders, using the above-mentioned large fiberglass cylinder forming mold.

[0005] A large fiberglass cylinder forming mold according to a first aspect of the present invention includes: a mold support;

[0006] A fixed mold, which is fixed on the mold support, has an arc-shaped concave first contact surface;

[0007] A sliding mold is disposed on the mold support and arranged symmetrically with the fixed mold. The sliding mold has an arc-shaped concave second contact surface, and the first contact surface and the second contact surface together form an arc-shaped mold cavity.

[0008] An adjustment device is provided between the sliding mold and the mold support to adjust the distance between the fixed mold and the sliding mold.

[0009] The large fiberglass cylinder forming mold according to embodiments of the present invention has at least the following beneficial effects: the sliding mold can move on the mold support, and the distance between the sliding mold and the fixed mold can be determined by the adjustment control of the adjustment device, changing the distance between the first contact surface and the second contact surface, thereby realizing the change of mold size, and is suitable for rolling fiberglass cylinders of different specifications. A set of large fiberglass cylinder forming molds can be used to roll and form fiberglass cylinders of more specifications, greatly improving the mold utilization rate and reducing production costs.

[0010] According to some embodiments of the present invention, the adjusting device includes a limiting bolt and a locking assembly. The sliding mold has a strip hole on one side opposite to the mold support. The limiting bolt is disposed on the mold support and passes through the strip hole. One end of the locking assembly is fixed on the mold support, and the other end is fixed on the sliding mold.

[0011] According to some embodiments of the present invention, the locking assembly includes a first fixing block, a second fixing block, and a locking bolt. The first fixing block is fixed on the mold support, and the second fixing block is correspondingly fixed on the sliding mold. Both the first fixing block and the second fixing block are provided with threaded holes, and the locking bolt passes through the threaded holes of the first fixing block and the second fixing block.

[0012] A method for rolling a large fiberglass cylinder according to a second aspect of the present invention includes: the above-mentioned large fiberglass cylinder forming mold, and rolling it through the following steps:

[0013] Step S1: Calculate the required distance between the fixed mold and the sliding mold according to the size of the fiberglass cylinder to be rolled, and adjust the position of the sliding mold on the mold support.

[0014] Step S2: Use a lifting device to lift the fiberglass flat sheet to be rolled and move it above the set fixed mold and sliding mold;

[0015] Step S3: The fiberglass plate, which is naturally bent by gravity, is lowered by the lifting device so that the side of the fiberglass plate contacts the first contact surface of the fixed mold and the second contact surface of the sliding mold respectively. The fiberglass plate is then lowered further and gradually rolled up and brought together by the guidance of the first and second contact surfaces to form a fiberglass cylinder.

[0016] Step S4: Connect and fix the joint of the fiberglass cylinder to complete the operation of rolling the fiberglass flat plate into a fiberglass cylinder.

[0017] The large fiberglass cylinder rolling method according to embodiments of the present invention has at least the following beneficial effects: the fixed mold and the sliding mold can be adjusted according to the size of the fiberglass cylinder to be rolled, realizing the multiple uses of a set of molds, improving the utilization rate of the molds, and reducing the amortized cost of the molds; by suspending the fiberglass plate and using its own weight to bend it from the side, it is easier to lower the fiberglass plate into the large fiberglass cylinder forming mold, making the rolling process easier.

[0018] According to some embodiments of the present invention, step S1 further includes step S1.1, which involves using multiple sets of large fiberglass cylinder forming molds and arranging these large fiberglass cylinder forming molds in the axial direction of the fiberglass cylinder to be rolled.

[0019] According to some embodiments of the present invention, step S2 includes:

[0020] Step S2.1: Determine the fiberglass flat plate as one side of the fiberglass cylinder circumference, and find the center point of the circumference side.

[0021] Step S2.2: Use a lifting device to hook onto the center points of a set of relatively distributed perimeter sides, and lift the fiberglass plate to move it above the set fixed mold and sliding mold.

[0022] According to some embodiments of the present invention, step S4 further includes step S4.1, in which a connecting plate is placed at the joint of the fiberglass cylinder, and rivets are used to pass through the connecting plate and the wall of the fiberglass cylinder to connect and fix the joint of the fiberglass cylinder.

[0023] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0025] Figure 1 This is a schematic diagram of the structure of a large fiberglass cylindrical molding die according to an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the adjustment device in an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the locking component in an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram illustrating the process of hoisting and lowering the fiberglass plate in an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the process of rolling a fiberglass flat sheet into a fiberglass cylinder in an embodiment of the present invention.

[0030] Icon labels:

[0031] Mold support 100, fixed mold 200, first contact surface 210, sliding mold 300, second contact surface 310, strip hole 320, adjusting device 400, limit bolt 410, locking assembly 420, first fixing block 421, second fixing block 422, locking bolt 423. Detailed Implementation

[0032] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0033] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0034] In the description of this invention, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or their sequential relationship.

[0035] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0036] Reference Figure 1 As shown, a large fiberglass cylinder forming mold according to an embodiment of the present invention includes a mold support 100;

[0037] The fixed mold 200 is fixed on the mold support 100 and has an arc-shaped concave first contact surface 210.

[0038] The sliding mold 300 is disposed on the mold support 100 and is symmetrically arranged with the fixed mold 200. The sliding mold 300 has an arc-shaped concave second contact surface 310, and the first contact surface 210 and the second contact surface 310 together form an arc-shaped mold cavity.

[0039] An adjusting device 400 is provided between the sliding mold 300 and the mold support 100 to adjust the distance between the fixed mold 200 and the sliding mold 300.

[0040] The mold support 100 is used for placement or fixing on the ground. The fixed mold 200 is fixed on the mold support 100, and its position is always fixed. The sliding mold 300 can move on the mold support 100, and the distance between the sliding mold 300 and the fixed mold 200 is determined by the adjustment control of the adjustment device 400, thereby changing the distance between the first contact surface 210 and the second contact surface 310, realizing the change of mold size, which is suitable for rolling fiberglass cylinders of different specifications.

[0041] Specifically, after the fiberglass plate is lifted, its two sides contact the first contact surface 210 and the second contact surface 310 respectively. The first contact surface 210 and the second contact surface 310 are arc-shaped, and the arc-shaped mold cavity they jointly form provides a guiding function, gradually rolling the fiberglass plate inward into a fiberglass cylinder. A set of large fiberglass cylinder forming molds can be used to roll and form fiberglass cylinders of more specifications, greatly improving mold utilization and reducing production costs.

[0042] The adjusting device 400 is mainly used to limit the movement direction of the sliding mold 300 and to lock the sliding mold 300, fixing the distance between the sliding mold 300 and the fixed mold 200 after the distance is adjusted. The following is one embodiment of the adjusting device 400.

[0043] Reference Figure 2 As shown, it can be understood that the adjusting device 400 includes a limiting bolt 410 and a locking assembly 420. The sliding mold 300 has a strip hole 320 on the side opposite to the mold support 100. The limiting bolt 410 is set on the mold support 100 and passes through the strip hole 320. One end of the locking assembly 420 is fixed on the mold support 100 and the other end is fixed on the sliding mold 300.

[0044] The limiting bolt 410 engages with the slotted hole 320 to restrict the movement direction of the sliding mold 300 on the mold support 100, that is, to restrict the sliding mold 300 to only move closer to or away from the fixed mold 200. The locking assembly 420 is used to lock the sliding mold 300 to prevent further movement, thus determining the distance between the sliding mold 300 and the fixed mold 200. Generally, the locking assembly 420 is used to lock the sliding mold 300 after its position has been adjusted. The locking assembly 420 can use a rigid connector, with one end fixed to the mold support 100 and the other end fixed to the sliding mold 300, thus locking the sliding mold 300 onto the mold support 100 to prevent further movement. The following is another embodiment of the locking assembly 420.

[0045] Reference Figure 3As shown, it can be understood that the locking assembly 420 includes a first fixing block 421, a second fixing block 422, and a locking bolt 423. The first fixing block 421 is fixed on the mold support 100, and the second fixing block 422 is correspondingly fixed on the sliding mold 300. Both the first fixing block 421 and the second fixing block 422 are provided with threaded holes, and the locking bolt 423 passes through the threaded holes of the first fixing block 421 and the second fixing block 422.

[0046] When the locking bolt 423 rotates in the threaded hole, it can change the relative position of the locking bolt 423 on the first fixing block 421 and the second fixing block 422 to match the relative position between the sliding mold 300 and the mold support 100. The first fixing block 421 is fixed on the mold support 100, and the second fixing block 422 is fixed on the sliding mold 300. Both are fixedly set, and the locking bolt 423 is a rigid structure. Therefore, the first fixing block 421, the second fixing block 422 and the locking bolt 423 can lock the sliding mold 300 and prevent it from continuing to move on the mold support 100.

[0047] Reference Figure 4 and Figure 5 As shown, an embodiment of the present invention provides a method for rolling a large fiberglass cylinder, which includes using the aforementioned large fiberglass cylinder forming mold and rolling it through the following steps:

[0048] Step S1: Calculate the required distance between the fixed mold and the sliding mold according to the size of the fiberglass cylinder to be rolled, and adjust the position of the sliding mold on the mold support.

[0049] Step S2: Use a lifting device to lift the fiberglass flat sheet to be rolled and move it above the set fixed mold and sliding mold;

[0050] Step S3: The fiberglass plate, which is naturally bent by gravity, is lowered by the lifting device so that the side of the fiberglass plate contacts the first contact surface of the fixed mold and the second contact surface of the sliding mold respectively. The fiberglass plate is then lowered further and gradually rolled up and brought together by the guidance of the first and second contact surfaces to form a fiberglass cylinder.

[0051] Step S4: Connect and fix the joint of the fiberglass cylinder to complete the operation of rolling the fiberglass flat plate into a fiberglass cylinder.

[0052] Fiberglass cylinders are made by rolling fiberglass sheets. After designing the fiberglass cylinder according to the requirements, the dimensions of the fiberglass sheets and the distance between the fixed mold and the sliding mold during rolling can be calculated so that the dimensions of the arc-shaped mold cavity formed by the first contact surface and the second contact surface match the dimensions of the fiberglass cylinder.

[0053] Then, the fiberglass sheet is lifted using a lifting device. Due to its structural characteristics before final molding, the fiberglass sheet is flexible and will bend downwards under gravity. The deformed fiberglass sheet is then hoisted above the fixed and sliding molds, with the curved, coiling side contacting the first and second contact surfaces. As the fiberglass sheet is lowered, guided by the first and second contact surfaces, the side continues to coil inwards until it finally comes together, forming a fiberglass cylinder. Finally, the joint of the fiberglass cylinder is connected and fixed, completing the process of rolling the fiberglass sheet into a fiberglass cylinder. This set of large fiberglass cylinder forming molds can be used for forming fiberglass cylinders of various sizes; only the distance between the fixed and sliding molds needs to be calculated and adjusted, saving the cost of making additional molds.

[0054] It is understood that step S1 also includes step S1.1, which involves using multiple sets of large fiberglass cylinder forming molds and arranging these large fiberglass cylinder forming molds in the axial direction of the fiberglass cylinder to be rolled.

[0055] Multiple sets of large fiberglass cylinder forming molds are arranged to form multiple arc-shaped mold cavities along the axial direction, consisting of a first contact surface and a second contact surface. When the fiberglass cylinder to be rolled is relatively long in the axial direction, the multiple sets of large fiberglass cylinder forming molds can uniformly guide the fiberglass flat plate, resulting in high roundness of the rolled fiberglass cylinder, minimal adjustment required later, and good product quality.

[0056] It is understood that step S2 includes:

[0057] Step S2.1: Determine the fiberglass flat plate as one side of the fiberglass cylinder circumference, and find the center point of the circumference side.

[0058] Step S2.2: Use a lifting device to hook onto the center points of a set of relatively distributed perimeter sides, and lift the fiberglass plate to move it above the set fixed mold and sliding mold.

[0059] Choosing to lift the fiberglass plate from the center point of the perimeter ensures that the curved parts on both sides of the fiberglass plate are symmetrical, which is beneficial for the balanced lowering of the fiberglass plate and ensures that the sides make contact with the first and second contact surfaces at approximately the same time. This allows it to be smoothly guided and begin rolling, preventing one side of the fiberglass plate from entering the arc-shaped mold cavity first, which would prevent the other side from being placed into the mold cavity.

[0060] It is understood that step S4 also includes step S4.1, in which a connecting plate is placed at the joint of the fiberglass cylinders, and rivets are used to pass through the connecting plate and the wall of the fiberglass cylinders to connect and fix the joint of the fiberglass cylinders.

[0061] After the fiberglass cylinders are rolled and joined together in the mold cavity, the joints need to be fixed to ensure proper shaping. There are many methods for fixing this, including hand lay-up. However, it is preferable to use a connecting plate and secure the joints by rivets passing through the connecting plate and the wall of the fiberglass cylinder. This method is more stable and reliable, preventing the fiberglass cylinder from recovering from internal stress.

[0062] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A method for rolling a large fiberglass cylinder, characterized in that, A large fiberglass cylinder forming mold is used, the large fiberglass cylinder forming mold comprising: Mold support (100); A fixed mold (200) is fixed on the mold support (100) and has an arc-shaped concave first contact surface (210). A sliding mold (300) is disposed on the mold support (100) and arranged symmetrically with the fixed mold (200). The sliding mold (300) has an arc-shaped concave second contact surface (310), and the first contact surface (210) and the second contact surface (310) together form an arc-shaped mold cavity. An adjusting device (400) is disposed between the sliding mold (300) and the mold support (100) to adjust the distance between the fixed mold (200) and the sliding mold (300); And roll it up using the following steps: Step S1: Calculate the required distance between the fixed mold and the sliding mold according to the size of the fiberglass cylinder to be rolled, and adjust the position of the sliding mold on the mold support. Step S2.1: Determine the fiberglass flat plate as one side of the fiberglass cylinder circumference, and find the center point of the circumference side. Step S2.2: Use a lifting device to hook the center points of a set of relatively distributed perimeter sides, and lift the fiberglass plate to move it above the set fixed mold and sliding mold; Step S3: The fiberglass plate, which is naturally bent by gravity, is lowered by the lifting device so that the side of the fiberglass plate contacts the first contact surface of the fixed mold and the second contact surface of the sliding mold respectively. The fiberglass plate is then lowered further and gradually rolled up and brought together by the guidance of the first and second contact surfaces to form a fiberglass cylinder. Step S4: Connect and fix the joint of the fiberglass cylinder to complete the operation of rolling the fiberglass flat plate into a fiberglass cylinder.

2. The method for rolling large fiberglass cylinders according to claim 1, characterized in that: The adjusting device (400) includes a limiting bolt (410) and a locking assembly (420). The sliding mold (300) has a strip hole (320) on the side opposite to the mold support (100). The limiting bolt (410) is disposed on the mold support (100) and passes through the strip hole (320). One end of the locking assembly (420) is fixed on the mold support (100), and the other end is fixed on the sliding mold (300).

3. The method for rolling large fiberglass cylinders according to claim 2, characterized in that: The locking assembly (420) includes a first fixing block (421), a second fixing block (422), and a locking bolt (423). The first fixing block (421) is fixed on the mold support (100), and the second fixing block (422) is correspondingly fixed on the sliding mold (300). Both the first fixing block (421) and the second fixing block (422) are provided with threaded holes, and the locking bolt (423) passes through the threaded holes of the first fixing block (421) and the second fixing block (422).

4. The method for rolling large fiberglass cylinders according to claim 1, characterized in that: Step S1 also includes step S1.1, which involves using multiple sets of large fiberglass cylinder forming molds and arranging these large fiberglass cylinder forming molds in the axial direction of the fiberglass cylinder to be rolled.

5. The method for rolling large fiberglass cylinders according to claim 1, characterized in that: Step S4 also includes step S4.1, in which a connecting plate is placed at the joint of the fiberglass cylinder, and rivets are used to pass through the connecting plate and the wall of the fiberglass cylinder to connect and fix the joint of the fiberglass cylinder.

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