Fiber composite pultrusion pre-forming core rod rear end positioning structure and core rod positioning device
By designing the rear end positioning structure of the fiber composite pultrusion preformed mandrel, the precise positioning of the mandrel is achieved by using sealing plates, positioning plates and adjustment bolts, the problem of insufficient positioning accuracy in the prior art is solved, and product quality and production are improved Universality.
Patent Information
- Application Number
- CN202420787278.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-16
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-04-16
AI Technical Summary
In the existing fiber composite pultrusion molding process, preformed molds cannot accurately control the positioning of the core rod, resulting in uneven wall thickness of the profile product and local buckling deformation.
A fiber composite pultruded preformed mandrel rear end positioning structure is designed, including a sealing plate, a positioning plate, a guide rail, a slider and an adjustment bolt. By sliding and rotating the position of the positioning plate, the precise positioning of the mandrel is achieved. A multi-point support structure is used to ensure positioning accuracy.
It significantly improves the quality of fiber composite pultruded profile products, achieves accurate and stable positioning of the mandrel, and is suitable for a variety of mold types without increasing high costs, improving the versatility of production and the consistency of products.
Smart Images
Figure CN222136016U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fiber pultrusion molding, in particular to a fiber composite pultrusion preforming core rod rear end positioning structure and a core rod positioning device. Background Art
[0002] Fiber composite pultruded profiles are composite materials with a constant cross-sectional shape made by pultrusion. They have the advantages of being lightweight, high-strength, corrosion-resistant, and easy to industrialize. They have been widely used in civil engineering as a lightweight structural component and have attracted widespread attention at home and abroad. However, when used as a load-bearing component, on the one hand, the profile cross-sectional size needs to be larger, and on the other hand, higher requirements are placed on the fiber mass density of the profile, which often needs to be as high as 70% or more. The huge amount of yarn used makes it difficult for the existing pultrusion process to meet production requirements, resulting in various quality problems in the profile products, such as uneven wall thickness and local buckling deformation.
[0003] The pultrusion die is generally composed of two parts: the preforming die and the forming die. The preforming die is composed of a group of yarn guide elements. The purpose is to remove excess resin from the fiber-reinforced material after impregnation, eliminate bubbles, gradually form a shape and size similar to the forming cavity, and finally enter the die. After actual investigation and analysis, the inability of the existing preforming die to accurately control positioning is a key factor affecting the quality of pultruded profile products. Specifically, the existing pultrusion production process generally uses a sealing plate to roughly position the end of the preforming die, and then adjusts it through high-strength bolts to achieve the purpose of positioning the core rod in the center. This positioning method has the following disadvantages: (1) The positioning accuracy is limited, and it is necessary to rely on continuous adjustment during the continuous production process to ensure the uniformity of the wall thickness, but it relies more on subjective control, which not only leads to uneven wall thickness in the same batch of components, but also leads to uneven wall thickness in different batches of components; (2) High-strength bolts are used for positioning in four directions, and synchronous control cannot be achieved. In this context, a preforming die positioning device that can achieve precise control is proposed to optimize the existing fiber composite pultrusion process, which is of great significance to improving the quality of pultruded profile products. Utility Model Content
[0004] The embodiment of the utility model provides a fiber composite pultrusion preforming mandrel rear end positioning structure and a mandrel positioning device, which are used to achieve accurate positioning of the preforming mold and improve product quality.
[0005] In order to achieve the above-mentioned purpose of the utility model, the utility model provides a fiber composite pultrusion preformed core rod rear end positioning structure, including a closing plate, the cross-section of the rear end of the core rod is square, and the front end face of the closing plate is provided with four positioning plates, the four positioning plates are respectively parallel to the four side surfaces of the rear end of the core rod, and the four positioning plates form a positioning cavity for accommodating the rear end of the core rod, and each positioning plate is slidably mounted on the closing plate in a direction perpendicular to the positioning plate.
[0006] Therefore, by sliding each positioning plate and changing the fixed position of the positioning plate, the positioning plate can be adapted to square core rods of different sizes, so that the sealing plate has excellent economy.
[0007] Furthermore, the front end surface of the sealing plate is provided with guide rails which cooperate with the corresponding positioning plates respectively, the extension direction of the guide rails is perpendicular to the corresponding positioning plates, the rear end of the positioning plate has a slider which cooperates with the guide rails, the slider is slidably installed in the guide rails, and the sealing plate is also provided with a positioning device which positions the slider at different positions of the guide rails.
[0008] Furthermore, the positioning device is an adjusting bolt, and a mounting plate is fixedly provided on the surface of the sealing plate located on the outer side of the guide rail, and the mounting plate has a guide hole for the adjusting bolt to pass through, and the adjusting bolt extends into the guide rail through the guide hole, and a threaded hole matching the adjusting bolt is provided at the end of the guide rail, and the end of the adjusting bolt is connected to the threaded hole through a thread, and the slider in the guide rail is rotatable and relatively fixedly installed on the adjusting bolt in the axial direction, and the screw rod of the adjusting bolt located on the outer side of the slider is provided with a scale for indicating the position of each positioning plate. Therefore, the position of the fixed slider on the guide rail can be adjusted by rotating the adjusting bolt, thereby realizing the adjustment of the position of the positioning plate, and the precise position of the positioning plate can be determined by observing the scale of the adjusting bolt on the upper surface of the mounting plate.
[0009] When adjusting the position of each positioning plate, each positioning plate can be adjusted to the same scale position with the aid of a scale, so that the positions of the four positioning plates remain accurate and uniform.
[0010] Preferably, the rear end surface of the positioning cavity has a positioning rod matched with the center hole of the mandrel, and when the rear end of the mandrel is inserted into the positioning cavity, the positioning rod is inserted into the center hole of the rear end of the mandrel.
[0011] The fiber composite pultrusion preformed mandrel positioning device using the mandrel rear end positioning structure comprises the mandrel rear end positioning structure, a first positioning frame and a second positioning frame which are sequentially arranged in a direction from rear to front. In specific use, the first positioning frame and the second positioning frame can be fixedly arranged on a base or a frame. The first positioning frame and the second positioning frame are both provided with cavities for the mandrel to pass through. The cavities of the first positioning frame and the second positioning frame are roughly coaxially arranged. The cavities both pass through the first positioning frame or the second positioning frame in the front-to-back direction. A first spliced limiting plate is arranged at the rear side of the first positioning frame, and a second spliced limiting plate and a third spliced limiting plate are respectively arranged at the rear side and the front side of the second positioning frame.
[0012] The two limit plate sections of the first spliced limit plate are fixedly connected to the first positioning frame by bolts, the two limit plate sections of the second spliced limit plate and the two limit plate sections of the third spliced limit plate are fixedly connected to the second positioning frame by bolts, the rear end of the core rod is installed in the positioning cavity of the positioning structure at the rear end of the core rod, and the sealing plate is fixedly connected to the first positioning frame by bolts.
[0013] The utility model realizes two-stage support of the mandrel through the first positioning frame and the second positioning frame, and further has four precise positioning points, namely, the sealing plate, the first spliced limiting plate, the second spliced limiting plate and the third spliced limiting plate, to realize accurate and stable positioning of the mandrel, which can significantly improve the product quality of the fiber composite pultruded profile. At the same time, the utility model has relatively strong versatility, can be applied to a variety of existing molds, and can be designed and adjusted accordingly according to different cross-sectional types, without adding excessive costs on the basis of existing molds.
[0014] Furthermore, the first spliced limit plate, the second spliced limit plate and the third spliced limit plate each include two limit plate sections, the two limit plate sections are arranged on both sides of the core rod, each limit plate section has a positioning opening for accommodating the core rod, and the positioning openings of the two limit plate sections form a positioning hole through which the clamping core rod passes.
[0015] Preferably, the axial center lines of the positioning cavity, the positioning hole of the first spliced limiting plate, the positioning hole of the second spliced limiting plate and the positioning hole of the third spliced limiting plate are the same.
[0016] Furthermore, the positioning hole of the first spliced limiting plate, the positioning hole of the second spliced limiting plate and the positioning hole of the third spliced limiting plate are all square holes matching the cross section of the core rod.
[0017] For ease of installation, preferably, there is a gap of no less than 20 mm between the first positioning frame and the second positioning frame.
[0018] One or more technical solutions in the embodiments of the present utility model have at least the following technical effects or advantages:
[0019] The utility model has relatively strong versatility, can be applicable to various existing molds, and can be designed and adjusted accordingly according to different cross-section types without increasing excessive costs on the basis of existing molds.
[0020] The utility model realizes two-stage support of the core rod by the first positioning frame and the second positioning frame. Furthermore, it has four precise positioning points including a sealing plate, a first spliced limiting plate, a second spliced limiting plate and a third spliced limiting plate, thereby realizing accurate and stable positioning of the core rod, and can significantly improve the product quality of the fiber composite pultruded profile. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a structural schematic diagram of the positioning structure of the rear end portion of the core rod of the utility model.
[0022] Figure 2 It is a side structural schematic diagram of the positioning structure of the rear end portion of the core rod of the utility model.
[0023] Figure 3 It is a structural schematic diagram of the fiber composite pultrusion preforming core rod positioning device of the utility model.
[0024] Figure 4 It is a structural schematic diagram of the spliced limiting plate of the utility model.
[0025] Legend: 1-first positioning frame, 2-second positioning frame, 3-core rod, 4-first spliced limit plate, 5-sealing plate, 6-second spliced limit plate, 7-third spliced limit plate, 8-limit plate section, 9-positioning hole, 10-positioning cavity, 11-positioning plate, 12-positioning rod, 13-guide rail, 14-slider, 15-adjusting bolt, 16-mounting plate. DETAILED DESCRIPTION
[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0027] like Figure 1 , Figure 2As shown, an embodiment of the utility model provides a rear end positioning structure of a fiber composite pultrusion preformed core rod, including a closing plate 5, the cross-section of the rear end of the core rod 3 is square, and four positioning plates 11 are arranged on the front end face of the closing plate 5, the four positioning plates 11 are respectively parallel to the four side surfaces of the rear end of the core rod 3, and the four positioning plates 11 form a positioning cavity 10 for accommodating the rear end of the core rod 3, and each positioning plate 11 is slidably mounted on the closing plate 5 in a direction perpendicular to the positioning plate 11.
[0028] Therefore, by sliding each positioning plate 11 and changing the fixed position of the positioning plate 11 , the positioning plate 11 can be adapted to square core rods 3 of different sizes, so that the sealing plate 5 has excellent economic efficiency.
[0029] Furthermore, the front end surface of the sealing plate 5 is provided with guide rails 13 respectively matched with the corresponding positioning plates 11, the extension direction of the guide rails 13 is perpendicular to the corresponding positioning plates 11, the rear end of the positioning plate 11 has a slider 14 matched with the guide rails 13, the slider 14 is slidably installed in the guide rails 13, and the sealing plate 5 is also provided with a positioning device for positioning the slider 14 at different positions of the guide rails 13.
[0030] Furthermore, the positioning device is an adjusting bolt 15, and a mounting plate 16 is fixedly provided on the surface of the sealing plate 5 located on the outer side of the guide rail 13. The mounting plate 16 has a guide hole for the adjusting bolt 15 to pass through, and the adjusting bolt 15 extends into the guide rail 13 through the guide hole. The end of the guide rail 13 is provided with a threaded hole that matches the adjusting bolt 15, and the end of the adjusting bolt 15 is connected to the threaded hole through a thread. The slider 14 in the guide rail 13 is rotatable and relatively fixedly installed on the adjusting bolt 15 in the axial direction, and the screw rod of the adjusting bolt 15 located on the outer side of the slider 14 is provided with a scale for indicating the position of each positioning plate 11. Therefore, the position of the fixed slider 14 on the guide rail 13 can be adjusted by rotating the adjusting bolt 15, thereby realizing the adjustment of the position of the positioning plate 11, and the precise position of the positioning plate 11 can be determined by observing the scale of the adjusting bolt 15 on the upper surface of the mounting plate 16.
[0031] When adjusting the position of each positioning plate 11 , each positioning plate 11 can be adjusted to the same scale position with the aid of a scale, so that the positions of the four positioning plates 11 remain precisely uniform.
[0032] Preferably, the rear end face of the positioning cavity 10 has a positioning rod 12 that matches the center hole of the mandrel 3 , and when the rear end of the mandrel 3 is inserted into the positioning cavity 10 , the positioning rod 12 is inserted into the center hole of the rear end of the mandrel 3 .
[0033] like Figure 3As shown, a fiber composite pultrusion preformed mandrel positioning device using the mandrel rear end positioning structure comprises the mandrel rear end positioning structure, a first positioning frame 1 and a second positioning frame 2 which are sequentially arranged in a direction from rear to front. In specific use, the first positioning frame 1 and the second positioning frame 2 can be fixedly arranged on a base or a frame. The first positioning frame 1 and the second positioning frame 2 are both provided with cavities for the mandrel 3 to pass through. The cavities of the first positioning frame 1 and the second positioning frame 2 are roughly coaxially arranged. The cavities pass through the first positioning frame 1 or the second positioning frame 2 in the front-to-back direction. A first spliced limiting plate is arranged on the rear side of the first positioning frame 1, and a second spliced limiting plate 6 and a third spliced limiting plate 7 are respectively arranged on the rear and front sides of the second positioning frame 2;
[0034] The first spliced limiting plate 4, the second spliced limiting plate 6 and the third spliced limiting plate 7 each include two limiting plate sections 8, and the two limiting plate sections 8 are respectively arranged on both sides of the core rod 3. Figure 4 As shown, each limit plate section 8 has a positioning opening for accommodating the core rod 3, and the positioning openings of the two limit plate sections 8 form a positioning hole 9 through which the clamped core rod 3 passes, the two limit plate sections 8 of the first spliced limit plate 4 are fixedly connected to the first positioning frame 1 by bolts, the two limit plate sections 8 of the second spliced limit plate 6 and the two limit plate sections 8 of the third spliced limit plate 7 are fixedly connected to the second positioning frame 2 by bolts, the rear end of the core rod 3 is installed in the positioning cavity 10 of the positioning structure of the rear end of the core rod, and the closing plate 5 is fixedly connected to the first positioning frame 1 by bolts, and the axial center lines of the positioning cavity 10, the positioning hole of the first spliced limit plate 4, the positioning hole of the second spliced limit plate 6 and the positioning hole of the third spliced limit plate 7 are the same.
[0035] The utility model realizes two-stage support for the core rod 3 by the first positioning frame 1 and the second positioning frame 2. Furthermore, it has four precise positioning points including a closing plate 5, a first spliced limiting plate 4, a second spliced limiting plate 6 and a third spliced limiting plate 7, so as to realize accurate and stable positioning of the core rod 3, and can significantly improve the product quality of the fiber composite pultruded profile.
[0036] The utility model has relatively strong versatility, can be applicable to various existing molds, and can be designed and adjusted accordingly according to different cross-section types without increasing excessive costs on the basis of existing molds.
[0037] Furthermore, the positioning hole of the first spliced limiting plate 4 , the positioning hole of the second spliced limiting plate 6 , and the positioning hole of the third spliced limiting plate 7 are all square holes that match the cross section of the core rod 3 .
[0038] For ease of installation, preferably, there is a gap of no less than 20 mm between the first positioning frame 1 and the second positioning frame 2 .
[0039] In order to ensure that the limit plate itself does not undergo extrusion deformation, preferably, the first spliced limit plate 4, the sealing plate 5, the second spliced limit plate 6 and the third spliced limit plate 7 are all made of steel with high hardness and high strength.
[0040] The positioning process of the preform positioning device comprises the following steps:
[0041] S1, coaxially installing the first positioning frame 1 and the second positioning frame 2 in place;
[0042] S2, placing the mandrel 3 in the first positioning frame 1 and the second positioning frame 2, that is, passing through the cavities of the first positioning frame 1 and the second positioning frame 2 in sequence;
[0043] S3, install the first spliced limiting plate 4 at the rear end of the first positioning frame 1, and install the second spliced limiting plate 6 and the third spliced limiting plate 7 at both ends of the second positioning frame 2, so that the mandrel 3 is respectively accommodated in the positioning holes 9 of the first spliced limiting plate 4, the second spliced limiting plate 6 and the third spliced limiting plate 7;
[0044] S4, adjust the sealing plate 5 so that the positioning rod 12 is placed in the built-in hole of the core rod 3, and insert the rear end of the core rod 3 into the positioning cavity 10. After the debugging is completed, fix the positioning sealing plate 5, and the preforming mold is installed.
[0045] After the preforming mold is installed, the process of threading, resin impregnation, preforming, and molding can be completed and production can be carried out.
[0046] It should be noted that the above embodiments illustrate the present invention rather than limit it, and that those skilled in the art may design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets should not be constructed as a limitation to the claims. The words "comprise" or "include" do not exclude the presence of elements or steps not listed in the claims. The word "one" or "an" preceding an element does not exclude the presence of a plurality of such elements. The use of the words first, second, and third, etc. does not indicate any order, and these words may be interpreted as names.
[0047] All features disclosed in this specification, except mutually exclusive features, can be combined in any way.
[0048] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.
[0049] The present invention is not limited to the above-mentioned specific implementation modes, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.
Claims
1. A fiber composite pultrusion preformed mandrel rear end positioning structure, characterized in that: It includes a closing plate, the cross-section of the rear end of the core rod is square, and the front end face of the closing plate is provided with four positioning plates, the four positioning plates are respectively parallel to the four side faces of the rear end of the core rod, and the four positioning plates form a positioning cavity for accommodating the rear end of the core rod, and each positioning plate is slidably installed on the closing plate along a direction perpendicular to the positioning plate, and the front end face of the closing plate is provided with guide rails respectively matched with the corresponding positioning plates, and the extension direction of the guide rails is perpendicular to the corresponding positioning plates, and the rear end of the positioning plate has a slider matched with the guide rail, and the slider is slidably installed in the guide rail, and the closing plate is also provided with a positioning device for positioning the slider at different positions of the guide rail.
2. A fiber composite pultrusion preformed mandrel rear end positioning structure according to claim 1, characterized in that: The positioning device is an adjusting bolt. A mounting plate is fixedly provided on the surface of the sealing plate located on the outer side of the guide rail. The mounting plate has a guide hole for the adjusting bolt to pass through. The adjusting bolt extends into the guide rail through the guide hole. A threaded hole matching the adjusting bolt is provided at the end of the guide rail. The end of the adjusting bolt is connected to the threaded hole through a thread. The slider in the guide rail is rotatable and relatively fixedly installed axially on the adjusting bolt. The screw rod of the adjusting bolt located on the outer side of the slider is provided with scales for indicating the positions of each positioning plate.
3. A fiber composite pultrusion preformed mandrel rear end positioning structure as claimed in claim 1, characterized in that: The rear end surface of the positioning cavity is provided with a positioning rod matched with the center hole of the core rod. When the rear end of the core rod is inserted into the positioning cavity, the positioning rod is inserted into the center hole of the rear end of the core rod.
4. A fiber composite pultrusion preforming mandrel positioning device using the mandrel rear end positioning structure as described in any one of claims 1 to 3, characterized in that: The invention comprises the mandrel rear end positioning structure, the first positioning frame and the second positioning frame which are sequentially arranged in the direction from the rear to the front. In the specific use process, the first positioning frame and the second positioning frame can be fixedly arranged on the base or the frame. The first positioning frame and the second positioning frame are both provided with cavities for the mandrel to pass through inside. The cavities penetrate the first positioning frame or the second positioning frame in the front-to-back direction. The rear side of the first positioning frame is provided with a first spliced limiting plate, and the rear side and the front side of the second positioning frame are respectively provided with a second spliced limiting plate and a third spliced limiting plate; The two limit plate sections of the first spliced limit plate are fixedly connected to the first positioning frame by bolts, the two limit plate sections of the second spliced limit plate and the two limit plate sections of the third spliced limit plate are fixedly connected to the second positioning frame by bolts, the rear end of the core rod is installed in the positioning cavity of the positioning structure at the rear end of the core rod, and the sealing plate is fixedly connected to the first positioning frame by bolts.
5. A fiber composite pultrusion preformed mandrel positioning device as claimed in claim 4, characterized in that: The first spliced limit plate, the second spliced limit plate and the third spliced limit plate each include two limit plate sections, which are arranged on both sides of the core rod, each limit plate section has a positioning opening for accommodating the core rod, and the positioning openings of the two limit plate sections form a positioning hole through which the clamping core rod passes.
6. A fiber composite pultrusion preformed mandrel positioning device as claimed in claim 5, characterized in that: The axial center lines of the positioning cavity, the positioning hole of the first spliced limiting plate, the positioning hole of the second spliced limiting plate and the positioning hole of the third spliced limiting plate are the same.
7. A fiber composite pultrusion preformed mandrel positioning device as claimed in claim 5, characterized in that: The positioning hole of the first spliced limiting plate, the positioning hole of the second spliced limiting plate and the positioning hole of the third spliced limiting plate are all square holes that match the cross section of the core rod.
8. A fiber composite pultrusion preformed mandrel positioning device as claimed in claim 5, characterized in that: There is a gap of not less than 20 mm between the first positioning frame and the second positioning frame.