Anchoring rod tray and method for manufacturing the same

Abstract

The application provides an anchor rod tray and a preparation method thereof, which comprises a barrel and a tray body, the tray body is arranged around the outer periphery of the barrel, the axial direction of the barrel is the same as the axial direction of the tray body, the barrel has a tray hole, the tray hole penetrates the barrel in the axial direction, the anchor rod tray can be sleeved on the anchor rod through the tray hole, the barrel is made of a continuous fiber reinforced prepreg, the tray body is made of a continuous fiber and short fiber hybrid reinforced prepreg, and the tray body is arranged on the barrel through a hot pressing process. Through the technical scheme provided in the application, the problem that the tray hole of the anchor rod tray prepared by dry material injection molding in the prior art is prone to cracking can be solved.

Description

Technical Field

[0001] This invention relates to the field of anchor bolt tray technology, and more specifically, to an anchor bolt tray and its manufacturing method. Background Technology

[0002] Rock bolt structures are the primary support equipment in coal roadway support. A typical rock bolt structure consists of interconnected rock bolts and a rock bolt holder. During support, the preload nut, under torque, presses the rock bolt holder against the roadway surface. The loosening and deformation of the coal mass transfers the load to the rock bolt holder, which then transmits the load to the rock bolts. This, to a certain extent, inhibits coal loosening caused during mining. The strength of the rock bolt holder directly determines the stability of the anchoring system.

[0003] In the existing technology, anchor bolt trays are usually made by dry material injection molding. However, anchor bolt trays made by injection molding are prone to cracking at the tray holes. Summary of the Invention

[0004] This invention provides an anchor bolt tray and its preparation method to solve the problem that anchor bolt trays prepared by dry material injection molding in the prior art are prone to cracking at the tray holes.

[0005] According to one aspect of the present invention, an anchor bolt tray is provided, comprising a cylindrical body and a tray body, the tray body surrounding the outer periphery of the cylindrical body, the axial direction of the cylindrical body being the same as the axial direction of the tray body, the cylindrical body having a tray hole extending axially through the cylindrical body, the anchor bolt tray being able to be fitted onto an anchor bolt through the tray hole, the cylindrical body being made of a continuous fiber reinforced prepreg, the tray body being made of a prepreg reinforced with a mixture of continuous fibers and chopped fibers, and being mounted on the cylindrical body by a hot pressing process.

[0006] Furthermore, the cylinder includes a body portion, a first flange and a second flange, the first flange and the second flange being respectively arranged in a ring at the two ends of the body portion, and the tray body being located between the first flange and the second flange.

[0007] Furthermore, along the direction from the first flange to the second flange, the diameter of the body gradually increases, the taper of the tray hole is set between 1:4 and 1:6, and the width of the second flange is greater than the width of the first flange.

[0008] Furthermore, the pallet body includes a first section, a transition section, and a second section arranged sequentially along the axial direction. The outer diameter of the first section is smaller than that of the second section, and the outer diameter of the transition section gradually increases along the direction from the first section to the second section.

[0009] Furthermore, the pallet body also includes reinforcing ribs, which include interconnected top surfaces, connecting sides, and connecting bottom surfaces. The connecting sides and connecting bottom surfaces form an angle. The extending direction of the connecting sides is the same as the extending direction of the first segment. The connecting sides are connected to the outer wall of the first segment. The extending direction of the connecting bottom surfaces is the same as the extending direction of the transition segment. The connecting bottom surfaces are connected to the outer wall of the transition segment. One end of the top surface is connected to the end face of the first segment away from the transition segment via an arc transition. The other end of the top surface is connected to the end face of the second segment near the first segment via an arc transition.

[0010] According to another aspect of the present invention, a method for preparing an anchor bolt tray is provided, which is used to prepare the above-mentioned anchor bolt tray. The preparation method includes: Step 1: preparing the cylinder of the anchor bolt tray using a continuous fiber reinforced prepreg; Step 2: placing the cylinder obtained in Step 1 into a mold, laying a prepreg reinforced with a mixture of continuous fibers and chopped fibers inside the mold, and hot-pressing the prepreg reinforced with the mixture of continuous fibers and chopped fibers onto the outer periphery of the cylinder 10 to form the tray body 20 of the anchor bolt tray; Step 3: demolding the anchor bolt tray.

[0011] Further, step 1 specifically includes: Step 11: Prepare a support member, which is a cylindrical structure. The first prepreg tape is circumferentially wound around the inner wall of the cylinder in a direction perpendicular to the cylinder's axis, for 1 to 5 layers. Step 12: The second prepreg tape is circumferentially wound around the outer wall of the first prepreg tape in a direction at a 45° angle to the cylinder's axis, for 1 to 5 layers. Step 13: The third prepreg tape is circumferentially wound around the outer wall of the second prepreg tape in a direction at a negative 45° angle to the cylinder's axis, for 1 to 5 layers. Step 14: The entire structure formed by the winding of the first, second, and third prepreg tapes is pre-shaped. The entire structure is formed into a cylinder by autoclaving, and then the support member is removed.

[0012] Further, step 11 also includes: fitting a first support ring and a second support ring onto the outer side walls at both ends of the support member, bending one end of the first prepreg tape outward and extending it to the end face of the first support ring near the end of the second support ring to form a first bent portion, and bending the other end of the first prepreg tape outward and extending it to the end face of the second support ring near the end of the first support ring to form a second bent portion; step 12 also includes: bending one end of the second prepreg tape outward and extending it to the end face of the first bent portion near the end of the second bent portion. The third bend is formed by bending the other end of the second prepreg tape outward and extending it to the end face of the second bend tape near the first bend tape to form a fourth bend tape; step 13 further includes: bending one end of the third prepreg tape outward and extending it to the end face of the third bend tape near the fourth bend tape to form a fifth bend tape, bending the other end of the third prepreg tape outward and extending it to the end face of the fourth bend tape near the third bend tape to form a sixth bend tape; step 14 further includes: removing the first support ring and the second support ring.

[0013] Furthermore, a prepreg reinforced with a mixture of continuous and chopped fibers is laid inside the mold, specifically including: Step 21: Cutting the prepreg reinforced with a mixture of continuous and chopped fibers into multiple sets of annular prepreg sheets with gradually increasing outer diameters; Step 22: Sequentially placing multiple sets of annular prepreg sheets with different diameters onto the outer periphery of the cylinder according to their outer diameters from smallest to largest.

[0014] Furthermore, before step 21, step 2 also includes: step 201: pre-laying a chopped fiber layer on the continuous fiber; step 202: thermally bonding the continuous fiber on the side away from the chopped fiber layer and the chopped fiber layer on the side away from the continuous fiber using a film prepreg equipment to form a prepreg sheet.

[0015] The technical solution of this invention involves hot-pressing a prepreg reinforced with a mixture of continuous and chopped fibers onto the outside of a cylinder made of continuous fiber-reinforced prepreg. This arrangement ensures the structural strength of the tray holes and reduces the likelihood of cracking at these points. Specifically, in this solution, the cylinder is made of continuous fiber-reinforced prepreg, which has high structural strength. The tray body is hot-pressed onto the cylinder, which supports the tray body. This arrangement ensures both the structural strength of the tray body and the connection strength between the tray body and the cylinder. In conventional solutions, anchor trays are typically injection-molded from dry materials. Such anchor trays are prone to cracking or splitting at the tray holes, resulting in poor structural strength. The anchor bolt tray of this design consists of a cylinder made of continuous fiber-reinforced prepreg and a tray body made of a mixture of continuous and chopped fiber reinforced prepreg. The cylinder made of continuous fiber-reinforced prepreg forms the tray holes. This design can prevent cracking at the tray holes. Furthermore, the tray body is circumferentially hot-pressed onto the outside of the cylinder, resulting in a high connection strength between the cylinder and the tray body. It also ensures that the cylinder and the tray body support each other in the axial direction, preventing deformation of the cylinder and the tray body and guaranteeing the structural strength of the anchor bolt tray. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1 A schematic diagram of the structure of the cylinder provided in an embodiment of the present invention is shown;

[0018] Figure 2 A schematic diagram of the structure of the anchor tray provided in an embodiment of the present invention is shown;

[0019] Figure 3 A front view of the anchor tray provided in an embodiment of the present invention is shown;

[0020] Figure 4 A top view of the anchor tray provided in an embodiment of the present invention is shown;

[0021] Figure 5 The embodiments of the present invention are shown. Figure 4 A sectional view at point AA;

[0022] Figure 6 A cross-sectional view of a mold for preparing an anchor bolt tray, provided in an embodiment of the present invention, is shown.

[0023] Figure 7 This diagram illustrates the structure of the cylinder placed in the lower mold according to an embodiment of the present invention.

[0024] Figure 8 This diagram illustrates the structure of annular prepreg tape laid in the lower mold according to an embodiment of the present invention.

[0025] The above figures include the following reference numerals:

[0026] 10. Cylinder body; 101. Tray hole;

[0027] 11. Body portion; 12. First flange; 13. Second flange;

[0028] 20. Pallet body;

[0029] 21. First paragraph;

[0030] 22. Transition section;

[0031] 23. The second paragraph;

[0032] 24. Reinforcing ribs;

[0033] 30. Circular prepreg sheets;

[0034] 40. Mold;

[0035] 41. Lower mold; 411. Receiving cavity; 4111. Conical section; 4112. Cylindrical section;

[0036] 42. Upper mold;

[0037] 43. Conical protrusion. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] like Figures 1 to 5As shown, Embodiment 1 of the present invention provides an anchor bolt tray, which includes a cylindrical body 10 and a tray body 20. The tray body 20 surrounds the outer periphery of the cylindrical body 10, and the axial direction of the cylindrical body 10 is the same as the axial direction of the tray body 20. The cylindrical body 10 has a tray hole 101, which penetrates the cylindrical body 10 axially. The anchor bolt tray can be fitted onto the anchor bolt through the tray hole 101. The cylindrical body 10 is made of a continuous fiber reinforced prepreg, and the tray body 20 is made of a prepreg reinforced with a mixture of continuous fiber and chopped fiber, and is set on the cylindrical body 10 by a hot pressing process.

[0040] The technical solution of this invention involves hot-pressing a prepreg reinforced with a mixture of continuous and chopped fibers onto the outside of a cylinder 10 made of continuous fiber-reinforced prepreg. This arrangement ensures the structural strength of the tray hole 101 and reduces the likelihood of cracking at this location. Specifically, in this solution, the cylinder 10 is made of continuous fiber-reinforced prepreg, which has high structural strength. The tray body 20 is hot-pressed onto the cylinder 10 using a prepreg reinforced with a mixture of continuous and chopped fibers. The cylinder 10 supports the tray body 20, thus ensuring both the structural strength of the tray body 20 and the connection strength between it and the cylinder 10. In conventional solutions, anchor trays are typically injection-molded from dry materials. Such anchor trays are prone to cracking or splitting at the tray hole, resulting in poor structural strength. The anchor bolt tray of this design consists of a cylinder 10 made of continuous fiber reinforced prepreg and a tray body 20 made of a mixture of continuous and chopped fiber reinforced prepreg. The cylinder 10, made of continuous fiber reinforced prepreg, forms a tray hole 101. This design can prevent cracking at the tray hole 101. Furthermore, the tray body 20 is hot-pressed circumferentially around the outside of the cylinder 10, resulting in a high connection strength between the cylinder 10 and the tray body 20. This design also ensures that the cylinder 10 and the tray body 20 support each other in the axial direction, preventing deformation of the cylinder 10 and the tray body 20 and guaranteeing the structural strength of the anchor bolt tray.

[0041] Furthermore, in this design, the pallet body 20 is constructed by sequentially sleeved onto the outer side of the cylinder 10 with multiple annular prepreg sheets 30 reinforced with a mixture of continuous and chopped fibers along the axial direction of the cylinder 10, and then hot-pressed onto the outer wall of the cylinder 10. This arrangement enhances the support effect of the pallet body 20 on the side wall of the cylinder 10 in the axial direction, ensuring the structural strength of the cylinder 10 in the axial direction, improving the load-bearing capacity of the anchor pallet in the axial direction, ensuring the structural stability of the pallet body 20, and facilitating its molding. The outer diameter of the annular prepreg sheet 30 can gradually increase along the axial direction of the cylinder 10.

[0042] like Figure 1 and Figure 5 As shown, specifically, the cylinder 10 includes a body portion 11, a first flange 12, and a second flange 13. The first flange 12 and the second flange 13 are respectively arranged in a ring at the two ends of the body portion 11, and the tray body 20 is located between the first flange 12 and the second flange 13. The arrangement of the first flange 12 and the second flange 13 ensures the contact area between the tray body 20 and the cylinder 10, thus ensuring the stability of the connection between the tray body 20 and the cylinder 10. Furthermore, the arrangement of the first flange 12 and the second flange 13 ensures the structural strength of the two end faces of the anchor bolt tray.

[0043] In this embodiment, the end face of the first end of the pallet body 20 is flush with the end face of the first flange 12 away from the second flange 13, and the end face of the second end of the pallet body 20 is flush with the end face of the second flange 13 away from the first flange 12. This arrangement ensures the flatness of the end face of the anchor bolt pallet and guarantees the support effect of the anchor bolt pallet.

[0044] Furthermore, along the direction from the first flange 12 to the second flange 13, the diameter of the body portion 11 gradually increases, the taper of the tray hole 101 is set between 1:4 and 1:6, and the width of the second flange 13 is greater than the width of the first flange 12. When the taper of the tray hole 101 is greater than 1:4, stress concentration at the large end of the tapered hole at the tail of the anchor bolt tray easily leads to damage; when the taper of the tray hole 101 is less than 1:6, stress concentration at the small end of the tapered hole at the tail of the anchor bolt tray easily leads to damage. In this solution, the taper of the tray hole 101 is set within the above range, balancing the forces on both ends of the tapered hole and avoiding stress concentration. The taper of the tray hole 101 can be set to 1:4, 1:5, or 1:6; in this embodiment, the taper of the tray hole 101 is set to 1:5.

[0045] In this embodiment, the diameter of the first end of the anchor bolt tray is smaller than the diameter of the second end of the anchor bolt tray. A first flange 12 is provided corresponding to the second end of the anchor bolt tray, and a second flange 13 is provided corresponding to the first end of the anchor bolt tray. In this design, the width of the first flange 12 is smaller than the width of the second flange 13. This arrangement facilitates the hot pressing of the prepreg reinforced with a mixture of continuous and chopped fibers onto the cylinder 10 to form the anchor bolt tray. Furthermore, since the diameter of the first end of the anchor bolt tray is smaller than the diameter of the second end, providing a wider second flange 13 corresponding to the first end of the anchor bolt tray improves the overall structural strength of the first end of the anchor bolt tray. Specifically, in this design, the width of the first flange 12 refers to the difference between its outer diameter and inner diameter, and the width of the second flange 13 refers to the difference between its outer diameter and inner diameter.

[0046] like Figure 2and Figure 3 As shown, in this design, the pallet body 20 includes a first section 21, a transition section 22, and a second section 23 arranged sequentially along the axial direction. The outer diameter of the first section 21 is smaller than that of the second section 23. Along the direction from the first section 21 to the second section 23, the outer diameter of the transition section 22 gradually increases. This arrangement ensures the strength of the pallet tail by gradually increasing the outer diameter of the transition section 22, and the gradual arc transition avoids stress concentration.

[0047] Furthermore, the pallet body 20 also includes reinforcing ribs 24. Reinforcing ribs 24 include a top surface, connecting side surfaces, and a connecting bottom surface that are interconnected. The connecting side surfaces and the connecting bottom surface form an angle. The extending direction of the connecting side surfaces is the same as that of the first segment 21, and the connecting side surfaces are connected to the outer wall of the first segment 21. The extending direction of the connecting bottom surface is the same as that of the transition segment 22, and the connecting bottom surface is connected to the outer wall of the transition segment 22. One end of the top surface is connected to the end face of the first segment 21 away from the transition segment 22 with an arc transition, and the arc dimension is R8. The other end of the top surface is connected to the end face of the second segment 23 near the first segment 21 with an arc transition, and the arc dimension is R8. Reinforcing ribs 24 include two side walls arranged circumferentially opposite each other. The top end of the side walls is connected to the top surface with an arc transition, and the arc dimension is R8. The bottom surface of the side walls is connected to the outer wall of the transition segment 22. The inclusion of reinforcing ribs 24 further ensures the structural strength of the anchor pallet.

[0048] In this embodiment, multiple reinforcing ribs 24 are provided, and multiple reinforcing ribs 24 are provided at intervals along the circumference of the cylinder 10, and the width of each reinforcing rib 24 is 15mm.

[0049] like Figures 6 to 8 As shown, Embodiment 2 of the present invention provides a method for preparing an anchor bolt tray, which is used to prepare the above-mentioned anchor bolt tray. The preparation method includes: Step 1: Preparing the cylinder 10 of the anchor bolt tray using a continuous fiber reinforced prepreg; Step 2: Placing the cylinder 10 obtained in Step 1 into a mold 40, and laying a mixed reinforcement of continuous fiber and chopped fiber prepreg inside the mold 40, and hot-pressing the mixed reinforcement of continuous fiber and chopped fiber prepreg onto the outer periphery of the cylinder 10 to form the tray body 20 of the anchor bolt tray, and the cylinder 10 and the tray body 20 together form the anchor bolt tray; Step 3: Demolding the anchor bolt tray.

[0050] In this embodiment, the mold 40 includes a lower mold 41 and an upper mold 42 that cooperate with each other. The lower mold 41 is provided with a receiving cavity 411. The receiving cavity 411 includes a conical segment 4111 and a cylindrical segment 4112 arranged sequentially along the axial direction. The cylindrical segment 4112 is located above the conical segment 4111. The diameter of the conical segment 4111 gradually increases from bottom to top. The maximum diameter of the conical segment 4111 is the same as the diameter of the cylindrical segment 4112. The side wall of the conical segment 4111 is also provided with a protruding structure or a recessed structure to form a reinforcing rib 24 on the outer side wall of the anchor bolt tray.

[0051] The mold 40 also includes a conical protrusion 43, which is disposed within the receiving cavity 411. The conical protrusion 43 is coaxially arranged with the receiving cavity 411, and its bottom is integrally formed and connected to the bottom wall of the receiving cavity 411. The diameter of the conical protrusion 43 gradually decreases from bottom to top, and its top extends into the cylindrical section 4112. The pretreated cylinder 10 is fitted onto the conical protrusion 43, with its second flange 13 located below. The outer diameter of the corresponding end of the second flange 13 of the pretreated cylinder 10 is the same as the diameter of the bottom end of the conical section 4111, and the end face of the top of the pretreated cylinder 10 is flush with the end face of the top of the conical protrusion 43. A prepreg sheet is fitted onto the outside of the pretreated cylinder 10, and the stacking height of the prepreg sheet is higher than the height of the pretreated cylinder 10. During the hot pressing process, the prepreg sheet has fluidity. The above-mentioned settings can ensure the structural strength of the pallet body 20 and the ease of forming the pallet body 20.

[0052] Further, step 1 specifically includes: Step 11: Prepare a support member, which is a cylindrical structure. The first prepreg tape is circumferentially wound around the inner wall of the cylinder 10 in a direction perpendicular to the axis of the cylinder 10, for 1 to 5 layers. Step 12: The second prepreg tape is circumferentially wound around the outer wall of the first prepreg tape in a direction at a 45° angle to the axis of the cylinder 10, for 1 to 5 layers. Step 13: The third prepreg tape is circumferentially wound around the outer wall of the second prepreg tape in a direction at a negative 45° angle to the axis of the cylinder 10, for 1 to 5 layers. Step 14: The entire structure formed by the winding of the first, second, and third prepreg tapes is pre-shaped. The entire structure is formed into a cylinder by autoclaving, and then the support member is removed.

[0053] Further, step 11 also includes: fitting a first support ring and a second support ring onto the outer side walls at both ends of the support member, bending one end of the first prepreg tape outward and extending it to the end face of the first support ring near the end of the second support ring to form a first bent portion, and bending the other end of the first prepreg tape outward and extending it to the end face of the second support ring near the end of the first support ring to form a second bent portion; step 12 also includes: bending one end of the second prepreg tape outward and extending it to the end face of the first bent portion near the end of the second bent portion to form a second bent portion. Step 13 further includes: bending one end of the second prepreg tape outward and extending it to the end face of the second bend portion near the first bend portion to form a fourth bend portion; Step 14 further includes: bending one end of the third prepreg tape outward and extending it to the end face of the third bend portion near the fourth bend portion to form a fifth bend portion, bending the other end of the third prepreg tape outward and extending it to the end face of the fourth bend portion near the third bend portion to form a sixth bend portion; Step 14 further includes: after forming the cylinder 10, removing the first support ring and the second support ring.

[0054] Furthermore, a prepreg reinforced with a mixture of continuous and chopped fibers is laid inside the mold 40, specifically including: Step 21: Cutting the prepreg reinforced with a mixture of continuous and chopped fibers into multiple sets of annular prepreg sheets 30 with gradually increasing outer diameters; Step 22: Sequentially placing multiple sets of annular prepreg sheets 30 with different diameters around the outer periphery of the cylinder 10 according to their outer diameters from smallest to largest.

[0055] Furthermore, before step 21, step 2 also includes: step 201: pre-laying a chopped fiber layer on the continuous fiber; step 202: thermally bonding the continuous fiber on the side away from the chopped fiber layer and the chopped fiber layer on the side away from the continuous fiber using a film prepreg equipment to form a prepreg sheet.

[0056] In this embodiment, the specific steps for preparing the anchor bolt tray include:

[0057] Step 1: Cut the carbon fiber reinforced epoxy resin unidirectional prepreg into unidirectional prepreg tapes with a width of 30-50mm. The cylinder 10 made of unidirectional prepreg tape can effectively improve the axial strength of the anchor plate; high-strength glass fiber or basalt fiber can be used to replace carbon fiber.

[0058] Step 2: Prepare the support component, ensuring that the taper of the support component is set between 1:4 and 1:6. Fit a first support ring and a second support ring onto the outer walls of both ends of the tapered support component, respectively, so that the first support ring and the second support ring are coaxial with the support component. The first support ring is set at the end of the support component with a smaller diameter, and the second support ring is set at the end of the support component with a larger diameter. The width of the first support ring is smaller than the width of the second support ring.

[0059] Step 3: Divide the unidirectional prepreg tape prepared in Step 1 into three groups, namely the first prepreg tape, the second prepreg tape, and the third prepreg tape; wrap the first prepreg tape circumferentially around the inner wall of the cylinder 10 in a direction perpendicular to the axis of the cylinder 10, and wrap 1 to 5 layers, ensuring that one end of the first prepreg tape is bent outward and extends to the end face of the first support ring near the end of the second support ring to form a first bend, and the other end of the first prepreg tape is bent outward and extends to the end face of the second support ring near the end of the first support ring to form a second bend. Next, the second prepreg tape is circumferentially wound around the outer wall of the first prepreg tape at a 45° angle to the axis of the cylinder 10, for 1 to 5 layers. This ensures that one end of the second prepreg tape is bent outwards and extends to the end face of the first bend near the second bend, forming a third bend. The other end of the second prepreg tape is bent outwards and extends to the end face of the second bend near the first bend, forming a fourth bend. Then, the third prepreg tape is circumferentially wound around the outer wall of the second prepreg tape at a negative 45° angle to the axis of the cylinder 10, for 1 to 5 layers. This ensures that one end of the third prepreg tape is bent outwards and extends to the end face of the third bend near the fourth bend, forming a fifth bend. The other end of the third prepreg tape is bent outwards and extends to the end face of the fourth bend near the third bend, forming a sixth bend. The first, second, third, fourth, fifth, and sixth bends are all cut into a floral pattern, and the bends are cut according to the shape of the outer periphery of the first and second support rings.

[0060] Step 3: Pre-shape the assembly formed by winding the first, second, and third prepreg tapes together, which can be done by bonding. Then remove the support members and place the assembly formed by the first, second, and third prepreg tapes into a vacuum bag for autoclaving to form the cylinder 10.

[0061] Step 4: Pre-lay a chopped fiber layer on the continuous fiber; thermally bond the continuous fiber on the side away from the chopped fiber layer and the chopped fiber layer on the side away from the continuous fiber using a film prepreg equipment to form a prepreg sheet reinforced with continuous fiber and chopped fiber.

[0062] Step 5: Cut the prepreg sheets obtained in Step 4 into 10 annular prepreg sheets 30 with a diameter of 170±5mm, 10 annular prepreg sheets 30 with a diameter of 150±5mm, 10 annular prepreg sheets 30 with a diameter of 130±5mm, and 15 annular prepreg sheets 30 with a diameter of 100±5mm. Make a circular hole with a diameter of 35mm in the middle of the above annular prepreg sheets 30.

[0063] Step 6: Place the cylinder 10 onto the conical protrusion 43 of the mold 40, and place the pre-made annular prepreg sheets 30 from step 5 onto the outer periphery of the pretreated cylinder 10 in order of increasing diameter. Fasten the upper mold 42 of the mold 40, and keep the temperature of the mold 40 at 150±3℃. Then apply a pressure of 20 MPa and hold the pressure for 15 minutes.

[0064] (9) After the pressure holding is completed, the part is removed from the mold cavity, cooled and trimmed to obtain the finished anchor rod tray.

[0065] The above preparation method is easy to operate, and the support of the tray body 20 by the cylinder 10 improves the structural strength of the anchor tray.

[0066] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0067] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0068] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not 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 on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0069] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0070] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0071] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for preparing an anchor bolt tray, characterized in that, The anchor tray includes: A cylindrical body (10) and a pallet body (20) are provided. The pallet body (20) surrounds the outer periphery of the cylindrical body (10). The axial direction of the cylindrical body (10) is the same as that of the pallet body (20). The cylindrical body (10) has a pallet hole (101) that passes through the cylindrical body (10) axially. The anchor pallet can be fitted onto the anchor through the pallet hole (101). The cylindrical body (10) is made of continuous fiber reinforced prepreg. The pallet body (20) is made of continuous fiber and chopped fiber mixed reinforced prepreg and is set on the cylindrical body (10) by hot pressing. The preparation method includes: Step 1: Prepare the cylinder (10) of the anchor tray using a continuous fiber-reinforced prepreg. Step 2: Place the cylinder (10) obtained in Step 1 into the mold (40), lay a prepreg reinforced with a mixture of continuous fiber and chopped fiber inside the mold (40), and hot press the prepreg reinforced with a mixture of continuous fiber and chopped fiber onto the outer periphery of the cylinder (10) to form the tray body (20) of the anchor bolt tray. Step 3: Demold the anchor bolt tray; Step 1 specifically includes: Step 11: Prepare a support member, which is a cylindrical structure. Wrap the first prepreg tape circumferentially around the inner wall of the cylinder (10) in a direction perpendicular to the axis of the cylinder (10), and wrap 1 to 5 layers. Step 12: Wrap the second prepreg tape circumferentially around the outer wall of the first prepreg tape at a 45° angle to the axis of the cylinder (10), for 1 to 5 layers; Step 13: Wrap the third prepreg tape circumferentially around the outer wall of the second prepreg tape in a direction at a negative 45° angle to the axis of the cylinder (10), for 1 to 5 layers; Step 14: The first prepreg tape, the second prepreg tape and the third prepreg tape are pre-shaped into a whole by winding. The whole formed by the first prepreg tape, the second prepreg tape and the third prepreg tape is formed into the cylinder (10) by autoclaving. Then the support member is removed.

2. The method for preparing the anchor bolt tray according to claim 1, characterized in that, Step 11 further includes: fitting a first support ring and a second support ring onto the outer side walls at both ends of the support member, bending one end of the first prepreg tape outward and extending it to the end face of the first support ring near the end of the second support ring to form a first bent portion, and bending the other end of the first prepreg tape outward and extending it to the end face of the second support ring near the end of the first support ring to form a second bent portion. Step 12 further includes: bending one end of the second prepreg tape outward and extending it to the end face of the first bend portion near the end of the second bend portion to form a third bend portion, and bending the other end of the second prepreg tape outward and extending it to the end face of the second bend portion near the end of the first bend portion to form a fourth bend portion. Step 13 further includes: bending one end of the third prepreg tape outward and extending it to the end face of the third bend portion near the end of the fourth bend portion to form a fifth bend portion, and bending the other end of the third prepreg tape outward and extending it to the end face of the fourth bend portion near the end of the third bend portion to form a sixth bend portion. Step 14 further includes: after forming the cylinder (10), removing the first support ring and the second support ring.

3. The method for preparing the anchor bolt tray according to claim 1, characterized in that, A prepreg reinforced with a mixture of continuous and chopped fibers is laid inside the mold (40), specifically including: Step 21: Cut the prepreg sheet reinforced with a mixture of continuous and chopped fibers into multiple sets of annular prepreg sheets (30) with gradually increasing outer diameter. Step 22: Place multiple sets of annular prepreg sheets (30) with different diameters on the outer periphery of the cylinder (10) in order of increasing outer diameter.

4. The method for preparing the anchor bolt tray according to claim 3, characterized in that, Before step 21, step 2 further includes: Step 201: Pre-lay a layer of chopped fibers on the continuous fibers; Step 202: The continuous fibers on the side away from the chopped fiber layer and the chopped fiber layer on the side away from the continuous fibers are thermally laminated using a film prepreg equipment to form the prepreg sheet.

5. The method for preparing the anchor bolt tray according to claim 1, characterized in that, The cylinder (10) includes a body part (11), a first flange (12) and a second flange (13). The first flange (12) and the second flange (13) are respectively arranged in a ring at the two ends of the body part (11). The tray body (20) is located between the first flange (12) and the second flange (13).

6. The method for preparing the anchor bolt tray according to claim 5, characterized in that, Along the direction from the first flange (12) to the second flange (13), the diameter of the body portion (11) gradually increases, the taper of the tray hole (101) is set between 1:4 and 1:6, and the width dimension of the second flange (13) is greater than the width dimension of the first flange (12).

7. The method for preparing the anchor bolt tray according to claim 1, characterized in that, The pallet body (20) includes a first section (21), a transition section (22) and a second section (23) arranged sequentially along the axial direction. The outer diameter of the first section (21) is smaller than the outer diameter of the second section (23). The outer diameter of the transition section (22) gradually increases along the direction from the first section (21) to the second section (23).

8. The method for preparing the anchor bolt tray according to claim 7, characterized in that, The tray body (20) also includes a reinforcing rib (24), which includes a top surface, a connecting side surface, and a connecting bottom surface that are connected to each other. The connecting side surface and the connecting bottom surface have an angle between them. The extending direction of the connecting side surface is the same as the extending direction of the first segment (21). The connecting side surface is connected to the outer wall of the first segment (21). The extending direction of the connecting bottom surface is the same as the extending direction of the transition segment (22). The connecting bottom surface is connected to the outer wall of the transition segment (22). One end of the top surface is connected to the end face of the first segment (21) away from the transition segment (22) by an arc transition. The other end of the top surface is connected to the end face of the second segment (23) close to the first segment (21) by an arc transition.

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