Pultrusion composite material profile preparation tool with hollow cavity

Abstract

The utility model discloses a pultrusion composite material profile preparation tool with a hollow cavity, which comprises a bundling and shaping device and a forming mold which are sequentially arranged from front to back, a glue injection box is arranged between the bundling and shaping device and the forming mold, and the glue injection box is internally provided with a gum dipping hollow cavity which is through from front to back. The glue injection box is provided with a glue injection port communicated with the glue dipping hollow cavity and the outside, the forming mold is internally provided with a front-back through forming hollow cavity, and a rear end outlet of the glue dipping hollow cavity is communicated with a front end inlet of the forming hollow cavity; and the core rod extends from a front end inlet of the glue dipping hollow cavity to a rear end outlet of the forming hollow cavity. The glue injection box is adopted to replace a glue dipping tank, so that wool yarn accumulation caused by the use of the glue dipping tank is avoided, the production is more continuous, and the production time is longer; the qualified rate of the apparent quality of the profile is improved; the pollution to the production environment is avoided; and meanwhile, the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of preparation toolings of pultruded composite profiles with hollow cavity. BACKGROUND

[0002] Pultruded composite profiles are widely used in various industries, such as bridge support, aircraft structural beams, sports industry, etc. Compared with other fiber composite forming methods, pultrusion forming technology is a high-performance and economical profile production method, which is very suitable for mass production of high-quality fiber composite profiles.

[0003] Currently, the main production method of pultruded composite profiles is that glass fiber or carbon fiber is dipped in a submerged dip tank under the action of traction equipment, then extruded, and finally enters a preforming hole plate bundle and is cured and formed by a mold. This production method has the following disadvantages: 1. The production time is not durable, and the production is discontinuous. Because the glass fiber or carbon fiber yarns will accumulate in the dip tank, workers need to frequently inspect the accumulation of yarns in the dip tank and handle the accumulated yarns. If the inspection and handling are not in place, the mold will be blocked and the machine will stop, wasting the resin in the dip tank. 2. The quality of the product cannot be guaranteed. Because the dip tank is open and directly exposed to the air, moisture in the air can enter the resin fibers, resulting in unqualified appearance quality of the produced profiles. 3. The production method is not environmentally friendly. During the dipping, extruding, and bundling processes, glue is easily spilled, polluting the production environment. 4. The production cost is high. Not only does it increase the labor cost, but it also requires the purchase of labor protection articles, yarn preheating equipment, dehumidification equipment for glue rooms and yarn rooms, and environmental protection equipment.

[0004] It is urgent to solve the above problems. UTILITY MODEL CONTENTS

[0005] To solve the above technical problems, the utility model provides a preparation tooling of pultruded composite profiles with hollow cavity.

[0006] The technical scheme is as follows:

[0007] The present application relates to a preparation tooling of pultruded composite profiles with hollow cavity, which comprises a bundling and shaping device and a forming mold arranged in sequence from front to back, a glue injection box is arranged between the bundling and shaping device and the forming mold, the glue injection box is provided with a dip hollow cavity that penetrates from front to back, a glue injection port that communicates with the dip hollow cavity and the outside is arranged on the glue injection box, the forming mold is provided with a forming hollow cavity that penetrates from front to back, the rear outlet of the dip hollow cavity and the front inlet of the forming hollow cavity are communicated; a core rod that extends from the front inlet of the dip hollow cavity to the rear outlet of the forming hollow cavity is further included, and a profile forming mold hole that matches the cross section of the profile is formed between the circumferential inner wall of the forming hollow cavity and the circumferential outer wall of the core rod.

[0008] By replacing the dipping tank with a glue injection box, the production process for pultruded composite profiles changes from preforming in a bundled shaping device to dipping in the glue injection box, followed by curing in the forming mold. This avoids the yarn accumulation associated with using a dipping tank, enabling more continuous production and longer-term production. Resin is injected into the dipping cavity through the glue injection port, preventing contact between the resin fibers and air, significantly improving the surface quality of the profile and ensuring product quality. The glue in the glue injection box is less likely to overflow, preventing contamination of the production environment. Furthermore, labor costs and the purchase of various preheating, dehumidification, and environmental protection equipment are reduced, significantly lowering production costs.

[0009] In some embodiments, the clustering and shaping device, the glue injection box and the molding mold are fixedly connected through a tooling frame; a pressure relief cavity formed by an expanded diameter is provided at the connection between the glue dipping cavity and the molding cavity, and a pressure relief hole connected to the outside world is provided on the cavity wall of the pressure relief cavity; a positioning and partitioning device is also provided at the connection between the glue dipping cavity and the molding cavity, and the positioning and partitioning device includes at least one positioning and partitioning component, the outer end of the positioning and partitioning component is fixedly installed on the cavity wall of the glue dipping cavity or the molding cavity or the pressure relief cavity, and the inner end is fixedly connected to the core rod.

[0010] In some embodiments, the cross-sectional shape of the cavity in the dipping process is adapted to the cross-sectional shape of the profile, and the cross-sectional area gradually decreases from front to back, the cross-sectional area of ​​the hollow cavity in the molding process remains the same from front to back, and the minimum cross-sectional area of ​​the hollow cavity in the dipping process is not less than the cross-sectional area of ​​the hollow cavity in the molding process.

[0011] In some embodiments, the positioning partitioning device is located in the pressure relief chamber, and at least one positioning partitioning component with a rod-shaped structure is provided on each side of the cavity wall. The inner end of the positioning partitioning component has a positioning block, and the core rod is provided with a positioning groove adapted to the corresponding positioning block. Each positioning block is respectively embedded in the corresponding positioning groove and fixedly connected to the core rod through a connecting piece. Each of the positioning partitioning components is located on the same cross-section of the pressure relief chamber.

[0012] In some embodiments, the cluster shaping device includes a first orifice plate and a second orifice plate located behind the first orifice plate, and the second orifice plate is fixed by a core rod and installed near the front end entrance of the hollow cavity in the dipping.

[0013] In some embodiments, the tooling frame includes at least four connecting rods circumferentially distributed around the periphery of the glue injection box, the front end of each connecting rod is fixedly connected to the first orifice plate, and the rear end extends to the connection between the glue injection box and the molding mold, and is fixedly connected to the glue injection box and the molding mold through corresponding connecting blocks.

[0014] In some embodiments, the front end of the mandrel is mounted on the front end of the tool frame through a mandrel mounting assembly, the mandrel mounting assembly comprising a mandrel adjusting block, mandrel adjusting bolts and a clamping die piece;

[0015] The first hole plate is provided with a mandrel mounting hole, the mandrel adjusting block comprises a first adjusting block and a second adjusting block arranged side by side in the mandrel mounting hole, the first adjusting block and the second adjusting block are respectively provided with adjusting block clamping grooves at corresponding positions on the adjacent sides, the mandrel passes through the corresponding adjusting block clamping grooves, and the at least four mandrel adjusting bolts are respectively passed from the outside to the inside through the first hole plate and abut against the outer edges of the mandrel adjusting block.

[0016] The front end of the mandrel close to the mandrel adjusting block is provided with a mandrel clamping groove, the clamping die piece is provided with a corresponding clamping opening, the clamping die piece is clamped with the mandrel, and the rear side surface of the clamping die piece abuts against the front side surface of the first hole plate.

[0017] In some embodiments, the side wall of the glue dipping hollow cavity is provided with a glue injection pit, and the outlet of the glue injection port is located at the glue injection pit.

[0018] In some embodiments, the mandrel comprises a first mandrel and a second mandrel, and a mandrel connecting piece is arranged between the first mandrel and the second mandrel.

[0019] In some embodiments, the glue injection box is provided with a circulating water passing hole. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic view of the utility model;

[0021] Figure 2 It is a sectional view of the utility model;

[0022] Figure 3 It is a sectional view of the forming die;

[0023] Figure 4 It is a structural schematic view of the positioning partition piece;

[0024] Figure 5 It is a structural schematic view of the first hole plate and the clamping die piece;

[0025] Figure 6 It is a structural schematic view of the first hole plate and the adjusting block;

[0026] Figure 7 It is a sectional view of the mandrel. DETAILED DESCRIPTION

[0027] The utility model is further described below in combination with embodiments and drawings.

[0028] As Figures 1 to 7As shown, a tool for preparing a pultruded composite material profile with a hollow cavity mainly includes a bundling and shaping device 1, a glue injection box 2, a forming mold 3, a core rod 4, a tooling frame 5, a pressure relief chamber 6, a positioning partition 7, a core rod adjustment block 8, a core rod adjustment bolt 9, a mold clamping piece 10, a core rod connector 13 and a heating plate 14.

[0029] like Figures 1 to 3 As shown, the bundling and shaping device 1, the glue injection box 2, and the forming mold 3 are arranged in sequence from front to back. The bundling and shaping device 1 consists of a first orifice plate 11 and a second orifice plate 12 located behind the first orifice plate 11. The first orifice plate 11 and the second orifice plate 12 are both integrally formed plate structures with high strength and stable structure. A number of through holes are provided on the first orifice plate 11 and the second orifice plate 12 for the fibers to pass through. The shape and distribution of each through hole are determined by the cross-sectional shape of the profile. The through holes on the first orifice plate 11 are more dispersed than those on the second orifice plate 12. The fibers gradually gather and are bundled through the first orifice plate 11 and the second orifice plate 12, thereby limiting the position of the fiber bundle in the cross-sectional direction.

[0030] Furthermore, a glue-impregnating hollow cavity 21 that runs through from front to back is provided in the glue injection box 2. In this embodiment, the cross-sectional shape of the glue-impregnating hollow cavity 21 is preferably adapted to the cross-sectional shape of the profile, and the cross-sectional area gradually decreases from front to back. A glue injection port 22 connecting the glue-impregnating hollow cavity 21 and the outside world is provided on the glue injection box 2, and glue can be injected into the glue-impregnating hollow cavity 21 through the glue injection port 22. A glue injection pit 23 is provided on the side wall of the glue-impregnating hollow cavity 21, and the outlet of the glue injection port 22 is located at the glue injection pit 23. The glue injection pit 23 can store resin and reduce the resin pressure. During the production process, the overflow of the resin can be effectively avoided by adjusting the flow rate of the resin and the extrusion speed of the traction equipment. A liquid level observation port is provided on the glue injection box 2, through which the liquid level of the resin glue in the glue injection box 2 can be observed and the glue feeding amount can be adjusted. At the same time, a liquid level sensor can be installed in the dipping cavity 21. The liquid level sensor is connected to the control system of the glue feeding equipment, and the liquid level can be adjusted by the liquid level sensor. The glue injection box 2 is provided with a circulating water flow hole 24. Cooling water can be injected into the circulating water flow hole 24 according to the resin characteristics and production requirements to maintain the interior of the dipping cavity 21 at a low temperature and low pressure.

[0031] Furthermore, a hollow molding cavity 31 is provided in the molding die 3, which has a cross-sectional area that remains the same from front to back. A heating plate 14 is provided around the molding die 3 to maintain a high temperature and high pressure state in the molding die 3, which is conducive to curing and molding.

[0032] Further, the rear end of the glue injection box 2 is provided with a groove, and the front end of the forming mold 3 is provided with a corresponding boss, so that the glue injection box 2 and the forming mold 3 are connected, which is stable and reliable in structure, easy to assemble and ensures the assembly accuracy. The rear end outlet of the glue immersion cavity 21 and the front end inlet of the forming cavity 31 are communicated, and the minimum cross-sectional area of the glue immersion cavity 21 is not less than the cross-sectional area of the forming cavity 31, preferably the minimum cross-sectional area of the glue immersion cavity 21 is greater than the cross-sectional area of the forming cavity 31, which effectively avoids fiber disturbance. In this embodiment, the glue injection box 2 and the forming mold 3 are both cuboid structures, and are both enclosed by a plurality of pre-forming plates, which is convenient for production, transportation and installation.

[0033] As shown in Figures 1 to 7 The bundle shaping device 1, the glue injection box 2 and the forming mold 3 are fixedly connected through the tooling frame 5, and the tooling frame 5 includes at least four connecting rods 51 extending forward and backward and distributed circumferentially around the glue injection box 2, and a corresponding number of connecting blocks 52. In this embodiment, the connecting rods 51 are four in total and are distributed in a rectangular shape around the glue injection box 2. The front end of each connecting rod 51 is threadedly connected with a corresponding mounting hole on the first hole plate 11, and is fixed through a locking nut. The rear end of each connecting rod 51 is fixedly connected with the glue injection box 2 and the forming mold 3 through a corresponding connecting block 52. The connecting block 52 includes two first connecting blocks 521 and two second connecting blocks 522, which are both in the shape of “L” in cross section. The two first connecting blocks 521 are symmetrically distributed on both sides of the forming mold 3, and the two second connecting blocks 522 are symmetrically distributed on both sides of the glue injection box 2. The first connecting block 521 is fixedly connected with the forming mold 3 and two connecting rods 51, and the second connecting block is fixedly connected with the glue injection box 2 and the first connecting block 521 on the same side. This connection method is stable and reliable, and is convenient for installation and adjustment.

[0034] As shown in Figures 1 to 7As shown, the core rod 4 extends from the front end entrance of the impregnation hollow cavity 21 to the rear end exit of the forming hollow cavity 31, and the circumferential inner wall of the forming hollow cavity 31 and the circumferential outer wall of the core rod 4 form a profile forming die hole A matching the profile section, and the second hole plate 12 is fixedly installed at the front end entrance of the core rod 4 close to the impregnation hollow cavity 21. The number of core rods 4 depends on the number of profile cavities, and in the embodiment, the profile is a double-cavity composite profile, so the core rod 4 includes a first core rod 41 and a second core rod 42, and the front ends of the first core rod 41 and the second core rod 42 are both installed on the front end of the tool holder 5 through a core rod installation assembly including a core rod adjusting block 8, a core rod adjusting bolt 9, and a die clamping piece 10. The first hole plate 11 is provided with a core rod installation hole 111 in the center, and the core rod adjusting block 8 includes a first adjusting block 81 and a second adjusting block 82, which are oppositely arranged in the core rod installation hole 111. The corresponding positions of the adjacent sides of the first adjusting block 81 and the second adjusting block 82 are respectively provided with adjusting block clamping grooves 83, and the first core rod 41 and the second core rod 42 pass through the corresponding adjusting block clamping grooves 83, so that the first adjusting block 81 and the second adjusting block 82 cooperatively fix the first core rod 41 and the second core rod 42 in the circumferential direction. At least four core rod adjusting bolts 9 pass through the first hole plate 11 from the outside to the inside and abut against the outer edges of the core rod adjusting block 8. In the embodiment, the first hole plate 11 is preferably a rectangular plate, and two adjusting bolt holes are respectively arranged on the upper, lower, left, and right four sides of the first hole plate 11, and each core rod adjusting bolt 9 is threadedly matched with the corresponding adjusting bolt hole. By adjusting the core rod adjusting bolts 9 on the opposite sides, the positions of the first adjusting block 81 and the second adjusting block 82 can be adjusted, so that the positions of the first core rod 41 and the second core rod 42 can be adjusted. The front ends of the first core rod 41 and the second core rod 42 close to the core rod adjusting block 8 are both provided with core rod clamping grooves 41, and the die clamping piece 10 is provided with a corresponding clamping opening 101, the die clamping piece 10 is clamped and matched with the first core rod 41 and the second core rod 42, and the rear side thereof abuts against the front side of the first hole plate 11. The die clamping piece 10 can prevent the first core rod 41 and the second core rod 42 from being driven backward by the fiber.

[0035] Further, a core rod connecting piece 13 is arranged between the first core rod 41 and the second core rod 42. The core rod connecting piece 13 is composed of two parallel connecting plates fixedly connected, one of which is fixedly connected with the first core rod 41, and the other of which is fixedly connected with the second core rod 42, so that the core rod connecting piece 13 can ensure that the wall thickness of the reinforcing rib between the two cavities of the profile meets the quality requirements.

[0036] Further, a pressure relief cavity 6 formed by expanding the diameter is arranged at the joint of the impregnation hollow cavity 21 and the forming hollow cavity 31, which can be arranged at the rear end of the impregnation hollow cavity 21 or the front end of the forming hollow cavity 31. In the embodiment, the pressure relief cavity 6 is located at the front end of the forming hollow cavity 31. A pressure relief hole 61 communicating with the outside is arranged on the cavity wall of the pressure relief cavity 6, which is connected with the backflow hole at the front end of the impregnation hollow cavity 21 through a pressure relief backflow pipeline. The excess resin reenters the impregnation hollow cavity 21 through the pressure relief hole 61, the pressure relief backflow pipeline and the backflow hole, which is recycled, reduces the waste of resin and saves the cost.

[0037] Further, a positioning partition device is arranged at the joint of the impregnation hollow cavity 21 and the forming hollow cavity 31, which comprises at least one positioning partition piece 7. The outer end of the positioning partition piece 7 is fixedly installed on the cavity wall of the impregnation hollow cavity 21 or the pressure relief cavity 6, and the inner end is fixedly connected with the mandrel 4. In the embodiment, the positioning partition piece 7 is installed in the pressure relief cavity 6, which has a large space and is convenient for installation. Moreover, the positioning partition piece 7 is farther away from the mandrel mounting assembly at the front end, and the two fixed positions of the mandrel 4 are farther away from each other, so that the fixing mode of the mandrel 4 is more stable and reliable. At least one positioning partition piece 7 in the form of a rod structure is arranged on each side of the cavity wall of the pressure relief cavity 6. The inner end of the positioning partition piece 7 has a positioning block 71, and the mandrel 4 is provided with a positioning groove 41 matched with the corresponding positioning block 71. Each positioning block 71 is embedded in the corresponding positioning groove 41 and is fixedly connected with the mandrel 4 through a connecting piece. Each positioning partition piece 7 is located on the same cross section of the pressure relief cavity 6. In the embodiment, since there are two mandrels 4, one positioning partition piece 7 is arranged on each of the remaining three sides except the two adjacent mandrels 4. Under the joint action of the positioning partition piece 7, the front-end mandrel adjusting block 8 and the mandrel adjusting bolt 9, the two mandrels 4 can be kept in the central position and straight during the whole profile preparation process, which avoids the situation that the mandrel 4 can only be fixed at one end and the other end is in a free suspended state in the traditional tooling equipment. Since the mandrel 4 is slender, the uneven wall thickness and the unstable straightness and warping caused by the deflection of the mandrel 4 are large. The positioning partition piece 7 not only has the function of fixing the mandrel 4, but also can partition the profile forming die hole A, so as to prevent the disturbance and flow of the fibers in the impregnation hollow cavity 21 and the forming hollow cavity 31 and limit the fiber bundle.

[0038] The working process of the embodiment is as follows. The fibers pass through the first hole plate 11 and the second hole plate 12 under the action of the traction equipment, are bundled and shaped, then enter the glue injection box 2, the glue injection port 22 is injected with glue through the glue injection feeding equipment, the fibers are impregnated with resin in the impregnation hollow cavity 21, and the excess resin is separated out in the pressure relief cavity 6, and finally the fibers enter the forming hollow cavity 31 in the forming die 3, are pre-cured and cured under the action of the heating plate 14, and are finally discharged from the die.

[0039] Finally, it needs to be explained that the above description is only the preferred embodiments of the present application, and the ordinary skilled in the art can make various similar expressions under the inspiration of the present application without violating the purpose and claims of the present application, and such changes fall within the protection scope of the present application.

Claims

1. A pultruded composite profile with hollow cavity preparation tooling, comprising a bundle shaping device (1) and a forming die (3) arranged in sequence from front to back, characterized in that: The injection glue box (2) is provided between the bundle shaping device (1) and the forming die (3), the injection glue box (2) is internally provided with a front and rear through glue immersion hollow cavity (21), the injection glue box (2) is provided with an injection glue port (22) communicating with the glue immersion hollow cavity (21) and the outside, the forming die (3) is internally provided with a front and rear through forming hollow cavity (31), the rear end outlet of the glue immersion hollow cavity (21) and the front end inlet of the forming hollow cavity (31) are communicated, further comprising a core rod (4) extending from the front end inlet of the glue immersion hollow cavity (21) to the rear end outlet of the forming hollow cavity (31), and the circumferential inner wall of the forming hollow cavity (31) and the circumferential outer wall of the core rod (4) form a profile forming die hole (A) matched with the profile section.

2. The pultruded composite profile with hollow cavities manufacturing tooling of claim 1, wherein: The bundle shaping device (1), the injection glue box (2) and the forming die (3) are fixedly connected through the tooling frame (5), a pressure relief cavity (6) formed by expanding the diameter is arranged at the connection of the glue immersion hollow cavity (21) and the forming hollow cavity (31), a pressure relief hole (61) communicating with the outside is arranged on the cavity wall of the pressure relief cavity (6), and a positioning partition device is further arranged at the connection of the glue immersion hollow cavity (21) and the forming hollow cavity (31), the positioning partition device comprises at least one positioning partition piece (7), the outer end of the positioning partition piece (7) is fixedly installed on the cavity wall of the glue immersion hollow cavity (21), the forming hollow cavity (31) or the pressure relief cavity (6), and the inner end is fixedly connected with the core rod (4).

3. The pultruded composite profile with hollow cavities manufacturing tooling of claim 1, wherein: The section shape of the glue immersion hollow cavity (21) is matched with the section shape of the profile, and the section area gradually decreases from front to back, the section area of the forming hollow cavity (31) remains the same from front to back, and the minimum section area of the glue immersion hollow cavity (21) is not less than the section area of the forming hollow cavity (31).

4. The pultruded composite profile with hollow cavities manufacturing tooling of claim 2, wherein: The positioning partition device is located in the pressure relief cavity (6), at least one positioning partition piece (7) in the form of a rod structure is arranged on each side cavity wall, the inner end of the positioning partition piece (7) is provided with a positioning block (71), the core rod (4) is provided with a positioning groove (41) matched with the corresponding positioning block (71), each positioning block (71) is embedded in the corresponding positioning groove (41), and is fixedly connected with the core rod (4) through a connecting piece, and each positioning partition piece (7) is located on the same cross section of the pressure relief cavity (6).

5. The pultruded composite profile with hollow cavities manufacturing tooling of claim 1, wherein: The bundle shaping device (1) comprises a first hole plate (11) and a second hole plate (12) located at the rear of the first hole plate (11), and the second hole plate (12) is fixedly installed on the front end inlet close to the glue immersion hollow cavity (21) through the core rod (4).

6. The pultruded composite profile with hollow cavities manufacturing tooling of claim 5, wherein: The tooling frame (5) comprises at least four connecting rods (51) circumferentially distributed on the periphery of the injection glue box (2), the front end of each connecting rod (51) is fixedly connected with the first hole plate (11), the rear end extends to the connection of the injection glue box (2) and the forming die (3), and is fixedly connected with the injection glue box (2) and the forming die (3) through the corresponding connecting block (52).

7. The pultruded composite profile with hollow cavities manufacturing tooling of claim 2, wherein: The front end of the mandrel (4) is installed at the front end of the tool frame (5) through a mandrel installation assembly, which comprises a mandrel adjusting block (8), a mandrel adjusting bolt (9) and a clamping die piece (10); The first aperture plate (11) is provided with a mandrel installation hole (111) at the center, and the mandrel adjusting block (8) comprises a first adjusting block (81) and a second adjusting block (82) arranged side by side in the mandrel installation hole (111), and the first adjusting block (81) and the second adjusting block (82) are respectively provided with adjusting block clamping grooves (83) at the corresponding positions of the adjacent sides, and the mandrel (4) passes through the corresponding adjusting block clamping grooves (83), and at least four mandrel adjusting bolts (9) pass through the first aperture plate (11) from outside to inside and abut against the outer edges of the mandrel adjusting block (8) in turn. The front end of the mandrel (4) close to the mandrel adjusting block (8) is provided with a mandrel clamping groove (41), and the clamping die piece (10) is provided with a corresponding clamping opening (101), the clamping die piece (10) is clamped with the mandrel (4), and the rear side surface thereof abuts against the front side surface of the first aperture plate (11).

8. The pultruded composite profile with hollow cavities manufacturing tooling of claim 1, wherein: The side wall of the glue dipping hollow cavity (21) is provided with a glue injection pit (23), and the outlet of the glue injection port (22) is located at the glue injection pit (23).

9. The tooling for preparing a pultruded composite material profile with a hollow cavity according to claim 1, characterized in that: The mandrel (4) comprises a first mandrel (41) and a second mandrel (42), and a mandrel connecting piece (13) is arranged between the first mandrel (41) and the second mandrel (42).

10. The pultruded composite profile with hollow cavities manufacturing tooling of claim 1, wherein: The glue injection box (2) is provided with a circulating water passing hole (24).

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