Preforming tooling and preforming method

Abstract

Disclosed in the present invention are a preforming tooling and a preforming method. The preforming tooling comprises preforming mold sets, each preforming mold set comprises at least one preforming mold, a plurality of preforming molds are sequentially arranged from front to back, and the same set of preforming molds are used for forming the same part structure of a product. Each preforming mold is provided with a flared tubular protrusion, an internal cavity is formed in the protrusion, and the internal cavity comprises a core mold accommodating area and a fabric preforming area on the periphery; a core mold clearance portion and fabric guide openings are provided on the front side wall of the preforming mold, the core mold clearance portion corresponds to the core mold accommodating area, the fabric guide openings correspond to the fabric preforming area, and a rear port of the internal cavity is a cavity outlet; and in the same set of preforming molds from front to back, the circumferential length of the fabric guide openings is gradually increased, and the cross sectional area of the cavity outlet is gradually increased. According to the present invention, the flared tubular preforming molds are used, so that the structural strength is increased, and the molds are not prone to tensile damage; and one preforming mold is used for forming a layer of fabric, so that the size matching is ensured, and fabric is not prone to shifting, thus improving the forming effect.

Description

Preforming tooling and preforming method

[0001] This application claims priority to the Chinese patent applications filed with the Patent Office of China on November 21, 2023, with application number 202311561413.2, application name “A preforming tooling and preforming method”, application number 202311561427.4, application name “A preforming mold”, application number 202323147548.2, application name “A magnetic adsorption device and composite material pultrusion preforming mold”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present invention relates to the technical field of pultrusion, in particular to a preforming tool and a preforming method. Background Art

[0003] The pultrusion preforming tooling of the prior art is shown in Figure 1, which includes multiple preforming plates 01' arranged in sequence from front to back. Each preforming plate 01' is correspondingly provided with a yarn feed port a' of different curvatures. The fabric passes through the corresponding yarn feed port a' on each preforming plate 01' and is gradually formed into the shape of the core mold under the action of the multiple preforming plates 01'.

[0004] As can be seen in Figure 1, when a product has multiple internal cavities, multiple yarn feed ports a' are provided on each preformed plate 01', resulting in weak strength of a single preformed plate 01', making it prone to damage during the pultrusion process. Furthermore, in practical applications, components are typically pultruded from multiple layers of fabric, with the width of each layer increasing from the inside out. However, in prior art pultrusion preforming tooling, each layer of fabric is formed using the same yarn feed port a'. Understandably, to meet the molding requirements of the outermost layer of fabric, the yarn feed port a' is larger than that of the inner layers of fabric, potentially causing the inner layers of fabric to shift during molding, resulting in unsatisfactory molding results and, in turn, affecting the structural strength of the molded product.

[0005] Therefore, how to provide a preforming tooling and preforming method to improve the structural strength of the tooling, avoid the problem of damage caused by pulling during the pultrusion process, and at the same time improve the forming effect of the fabric and ensure the structural strength of the product after forming is a technical problem that technical personnel in this field urgently need to solve. Summary of the Invention

[0006] The purpose of the present invention is to provide a preforming tool and a preforming method to improve the structural strength of the tool, avoid the problem of being damaged by pulling during the pultrusion process, and at the same time improve the forming effect of the fabric to ensure the structural strength of the product after forming.

[0007] In order to solve the above technical problems, the present invention provides a preforming tool, comprising at least one group of preforming mold groups, each group of the preforming mold groups having one or more preforming molds, the plurality of preforming molds being arranged in sequence from front to back, and the preforming molds in the same group being used to form the same part structure of the product,

[0008] The preforming mold has a raised portion protruding from front to back, and the raised portion is in the shape of an axially penetrating trumpet tube. The cross-sectional area of ​​the raised portion gradually decreases from front to back. The interior of the raised portion has an inner cavity, and the inner cavity includes a core mold accommodating area and a fabric preforming area located on the periphery of the core mold accommodating area. The front side wall of the preforming mold has a core mold avoidance portion and a yarn guide port extending circumferentially along the core mold avoidance portion. The core mold avoidance portion corresponds to the core mold accommodating area, and the yarn guide port corresponds to the fabric preforming area. The rear port of the inner cavity is the cavity outlet. In each of the preforming molds in the same group from front to back, the circumferential length of the yarn guide port gradually increases, and the cross-sectional area of ​​the cavity outlet gradually increases.

[0009] Optionally, the preforming mold includes a preforming plate and an adjustment plate, the middle part of the preforming plate bulges from front to back to form the bulge, the adjustment plate is provided with the core mold avoidance part and the yarn guide port, the adjustment plate is connected to the front side wall of the preforming plate, and the connection position of the adjustment plate is adjustable along the circumferential direction.

[0010] Optionally, the yarn guide port is an arc-shaped hole, the front end of the inner cavity is the cavity entrance, and the contour line of the cavity entrance is a matching arc at least at a position corresponding to the yarn guide port.

[0011] Optionally, the preforming mold group includes an intermediate cavity preforming mold group, and the preforming mold in the intermediate cavity preforming mold group is an intermediate cavity preforming mold. In the intermediate cavity preforming mold, the inner cavity is formed inside the raised portion, and the front port of the inner cavity is the cavity inlet. The cavity inlet is circular, and in the adjustment plate, the core mold avoidance portion is a hole-shaped structure and matches the shape of the cavity outlet.

[0012] Optionally, the preforming mold group includes an external contour preforming mold group, and the preforming mold in the external contour preforming mold group is an external contour preforming mold. In the external contour preforming mold, the interior of the raised portion forms the inner cavity, and the front port of the inner cavity is the cavity entrance. The cavity entrance is circular, and in the adjustment plate, the core mold avoidance portion is a hole-shaped structure and matches the shape of the cavity exit. The adjustment plate sets the number of the yarn guide ports to two, and the two yarn guide ports are located on the left and right sides of the core mold avoidance portion.

[0013] Optionally, in the external contour preforming die set, there are multiple external contour preforming dies, and the alternate external contour preforming dies are disconnected along the circumferential direction, and the disconnected positions form observation zones.

[0014] Optionally, the raised portion is provided with a glue injection port at one end close to the cavity outlet, and the inner wall of the raised portion is provided with a liquid storage tank at one end close to the cavity outlet, the liquid storage tank extends along the circumference of the raised portion, and the glue injection port is connected to the liquid storage tank.

[0015] Optionally, in the intermediate cavity preforming mold and the outer contour preforming mold, the preforming plate includes a first plate portion and a second plate portion arranged along the left and right directions, the first plate portion has a first notch cavity, and the second plate portion has a second notch cavity. After the first plate portion and the second plate portion are spliced ​​together, the first notch cavity and the second notch cavity enclose to form the inner cavity.

[0016] Optionally, the preforming mold group includes a two-side cavity preforming mold group, and the preforming mold in the two-side cavity preforming mold group is a two-side cavity preforming mold. In the two-side cavity preforming mold, the interior of the raised part is divided into a core mold avoidance cavity and two inner cavities, and the two inner cavities are connected to the left and right sides of the core mold avoidance cavity. The number of the adjustment plates is two, and the adjustment plates and the inner cavities are arranged in a one-to-one correspondence. The adjustment plate is provided with a notch groove with an open end, and the notch groove forms a partial structure of the core mold avoidance part. When the adjustment plate is connected to the preforming plate, the notch groove faces the core mold avoidance cavity.

[0017] Optionally, in the double-sided cavity preforming mold, the preforming plate includes a first plate portion and a second plate portion arranged in the up and down directions, and the first plate portion and the second plate portion are correspondingly provided with a first notch cavity located in the middle, and a second notch cavity located on the left and right sides of the first notch cavity, the corresponding first notch cavity encloses to form the core mold avoidance cavity, and the corresponding second notch cavity encloses to form the inner cavity.

[0018] Optionally, the number of the preforming mold groups is three, including a middle cavity preforming mold group, a two side cavity preforming mold group and an outer contour preforming mold group, which are arranged in sequence from front to back.

[0019] Optionally, the front side wall of the preformed plate is provided with a plurality of first connecting holes, which are distributed circumferentially; the adjustment plate is correspondingly provided with a plurality of second connecting holes, which are distributed circumferentially; and further includes a connecting member, which passes through the corresponding first connecting holes and the second connecting holes to fix the preformed plate and the adjustment plate.

[0020] Optionally, it also includes a support frame, which includes an upper fixing part and a lower fixing part, and the upper fixing part and the lower fixing part are correspondingly provided with fixing grooves, and the fixing grooves extend along the transverse direction of the support frame, and the fixing grooves pass through the transverse end walls of the upper fixing part and the lower fixing part, and the preforming mold is installed between the upper fixing part and the lower fixing part, and the upper and lower ends of the preforming plate are inserted into the corresponding fixing grooves.

[0021] Optionally, the preforming mold group includes an intermediate cavity preforming mold group, the preforming mold in the intermediate cavity preforming mold group is an intermediate cavity preforming mold, the preforming mold group includes an external contour preforming mold group, the preforming mold in the external contour preforming mold group is an external contour preforming mold, in the intermediate cavity preforming mold and the external contour preforming mold, the preforming plate includes a first plate portion and a second plate portion arranged in the left and right directions, the first plate portion has a first notch cavity, the second plate portion has a second notch cavity, after the first plate portion and the second plate portion are spliced ​​together, the first notch cavity and the second notch cavity enclose the inner cavity,

[0022] Upper and lower ends of the first plate portion and the second plate portion are capable of sliding along the axial direction of the fixing groove.

[0023] Optionally, the preforming mold group includes a two-sided cavity preforming mold group, the preforming mold in the two-sided cavity preforming mold group is a two-sided cavity preforming mold, and in the two-sided cavity preforming mold, the preforming plate includes a first plate portion and a second plate portion arranged in the up-down direction, the first plate portion and the second plate portion are correspondingly provided with a first notch cavity located in the middle, and second notch cavities located on the left and right sides of the first notch cavity, the corresponding first notch cavities enclose the core mold avoidance cavity, and the corresponding second notch cavities enclose the inner cavity.

[0024] The fixing groove for mounting the preforming molds of the cavities on both sides has a preset depth in the height direction. The upper end of the first plate portion is slidably mounted in the fixing groove at the upper end, and the first plate portion can move relative to the fixing groove in the height direction. When the first plate portion moves upward to a disengaged position, the first plate portion and the core mold can be staggered in the height direction.

[0025] The lower end of the second plate portion is slidably mounted on the fixing groove at the lower end, and the second plate portion can move relative to the fixing groove in the height direction. When the second plate portion moves downward to the disengaged position, the second plate portion and the core mold can be staggered in the height direction.

[0026] It also includes a connecting component, one end of which is connected to the support frame, and the other end of which is detachably connected to the first plate portion or the second plate portion.

[0027] Optionally, one or more fabric adjustment rods are further included, each of which is provided with a cloth seam extending in a vertical direction, and is installed on the support frame. The fabric adjustment rod is located on the front side corresponding to the preforming mold, and the installation position of the fabric adjustment rod is adjustable along the transverse direction of the support frame.

[0028] Optionally, it also includes a core mold fixing part and a magnetic adsorption device, the core mold fixing part is installed on the support frame for fixing the core mold, the magnetic adsorption device is installed at the upper rear end of the support frame, the magnetic adsorption device includes a magnetic mechanism, the magnetic mechanism is used to magnetically adsorb the tail of the core mold, and the position of the magnetic mechanism is adjustable along the height direction.

[0029] Optionally, the magnetic adsorption device also includes a mounting seat and an adjusting component, the mounting seat has a mounting cavity with an opening at the lower end, the adjusting component is connected to the closed end wall of the mounting cavity, the lower end wall of the adjusting component forms a support wall, the support wall is located inside the mounting cavity, the height of the support wall is adjustable, the upper rear end of the support frame has a support beam, the support beam is located inside the mounting cavity, the upper side wall of the support beam abuts against the support wall, the magnetic mechanism is connected to the outer side wall of the mounting seat, and the connection position is adjustable along the height direction.

[0030] Optionally, the closed end wall of the installation cavity is provided with a threaded hole, and the adjustment component includes an adjustment bolt, and the adjustment bolt is screwed into the corresponding threaded hole.

[0031] Optionally, there are two magnetic mechanisms, and the two magnetic mechanisms are respectively connected to the outer sides of the two side walls of the installation cavity.

[0032] Optionally, a transition seat is further included, the magnetic mechanism is fixed to the transition seat, the transition seat is connected to the mounting seat, the connection position of the transition seat is adjustable along the height direction, and the transition seat can also be fixed relative to the mounting seat when adjusted to a preset height.

[0033] Optionally, the transition seat includes a first connecting portion and a second connecting portion connected at right angles, the first connecting portion extends horizontally, the second connecting portion extends vertically, the magnetic mechanism is fixed to the first connecting portion, and the second connecting portion is used to connect to the mounting seat.

[0034] Optionally, the side wall of the mounting cavity is provided with a plurality of third connection hole groups, the plurality of third connection hole groups are distributed in the height direction, each of the third connection hole groups has one or more third connection holes, and the plurality of third connection holes are distributed in the horizontal direction.

[0035] The second connecting portion is provided with at least one fourth connecting hole and further includes at least one fixing member, which passes through the corresponding fourth connecting hole and any of the third connecting holes to fix the second connecting portion and the mounting seat.

[0036] Optionally, the fixing member includes a fixing bolt and a fixing nut, the fixing bolt passes through the corresponding fourth connecting hole and the third connecting hole, and the fixing nut is threadedly fixed to the fixing bolt.

[0037] Optionally, at least one connecting member is further included, and the magnetic mechanism and the first connecting part are fixed via the connecting member.

[0038] Optionally, the first connecting portion is provided with at least one through hole, the magnetic mechanism is correspondingly provided with at least one threaded connection hole, the connecting member includes a connecting bolt, the connecting bolt passes through the through hole and is screwed and fixed to the corresponding threaded connection hole.

[0039] Optionally, the core mold fixing portion includes a core mold adjustment seat located at the rear end, the core mold adjustment seat has a accommodating hole, the rear end of the core mold is inserted into the accommodating hole, and when the core mold is in a theoretical installation state, there is a preset gap between the inner circumferential wall of the accommodating hole and the corresponding end wall of the core mold.

[0040] Optionally, a fabric inlet plate is further included, which is located at the front end of each of the preforming molds. The fabric inlet plate has one or more fabric inlets, and each of the yarn guide ports is arranged in a one-to-one correspondence with one of the fabric inlets.

[0041] The present invention also provides a preforming method, based on the aforementioned preforming tooling, in the same preforming mold group, each preforming mold preforms a layer of fabric. During operation, the preforming mold at the front end preforms the innermost layer of fabric. After the innermost layer of fabric is preformed, the preforming mold at the adjacent rear end preforms the adjacent outer layer of fabric, and so on, forming from the inner layer to the outer layer in sequence.

[0042] The present invention proposes a new preforming tooling, wherein each preforming mold has a trumpet-shaped protrusion, the interior of the protrusion has an inner cavity, and the peripheral wall of the inner cavity is used to preform the outer contour of the fabric. Each preforming mold has a core mold avoidance part and a yarn guide port, and the core mold avoidance part is used to avoid the core mold. When working, the core mold can pass through the core mold avoidance part of the preforming mold and be installed in the core mold accommodating area of ​​the inner cavity. The function of the core mold is to preform the inner contour of the fabric. The area around the core mold accommodating area is The domain is the fabric preforming area, and the yarn guide port corresponds to the fabric preforming area and is used for the fabric to pass through. Therefore, the gap between the peripheral wall of the inner cavity and the outer peripheral wall of the core mold can be adaptively set according to the thickness of the fabric. During the preforming process, the fabric enters the inner cavity from the yarn guide port under the action of traction, is preformed under the action of the peripheral wall of the inner cavity and the core mold, and is finally led out from the cavity outlet. It can be understood that the fabric led out from the cavity outlet will be wrapped around the outer periphery of the core mold, that is, each preforming mold can complete the preforming of one layer of fabric.

[0043] Furthermore, since the fabric is wrapped around the outer periphery of the core mold when it is drawn out from each preforming mold, the core mold entering the rear preforming mold will be about one layer of fabric thicker than the core mold entering the adjacent front preforming mold. Correspondingly, the cavity outlet of the rear preforming mold will also be about one layer of fabric thicker than the cavity outlet of the adjacent front preforming mold. In other words, the cross-sectional area of ​​the cavity outlet gradually increases in each preforming mold from front to back in the same group. At the same time, in order to ensure that each layer of fabric has a good forming effect and avoid problems such as fabric deviation during the preforming process, the circumferential length of the yarn guide opening in each preforming mold should match the width of the corresponding fabric. The width of the outer fabric must be larger than the width of the inner fabric. Therefore, the circumferential length of the yarn guide opening in each preforming mold from front to back in the same group also gradually increases. In this way, after the inner fabric is preformed, the adjacent outer fabric can be preformed in sequence through the adjacent rear preforming mold, and so on, forming from the inner layer to the outer layer in sequence.

[0044] In combination with the above description, it can be seen that the preforming tooling of the present invention no longer adopts the flat preforming plate in the prior art, but adopts a trumpet-shaped preforming mold, and the trumpet extends along the pulling direction of the fabric. The structural strength of the preforming mold is significantly increased, and it is not easy to be damaged by pulling during the pultrusion process; in addition, since each preforming mold is used to form a layer of fabric, the structural dimensions of each preforming mold, such as the size of the yarn guide port, are all adapted to the size of the corresponding fabric. The fabric is not easy to deviate when passing through the corresponding preforming mold, thereby improving the forming effect of the fabric and ensuring the structural strength of the formed product. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] FIG1 is a schematic structural diagram of a preforming mold in the prior art;

[0046] FIG2 is a schematic structural diagram of a specific embodiment of the preforming tooling provided by the present invention; a

[0047] Figure 3 is a schematic diagram of the innermost fabric preform of the middle cavity;

[0048] FIG4 is a schematic structural diagram of a product formed by a preforming tool of the present invention;

[0049] FIG5 is a schematic structural diagram of the intermediate cavity preforming mold in the preforming tooling of FIG2 ;

[0050] FIG6 is a schematic structural diagram of the preforming mold of FIG5 at a second angle;

[0051] FIG7 is a schematic structural diagram of the preforming mold in FIG5 at a third angle;

[0052] FIG8 is a schematic structural diagram of the preforming mold in FIG5 at a fourth angle;

[0053] FIG9 is a schematic structural diagram of a first specific embodiment of the external contour preforming mold in the preforming tooling of FIG2 ;

[0054] FIG10 is a schematic structural diagram of the preforming mold of FIG9 at a second angle;

[0055] FIG11 is a schematic structural diagram of the preforming mold in FIG9 at a third angle;

[0056] FIG12 is a schematic structural diagram of the preforming mold of FIG9 at a fourth angle;

[0057] FIG13 is a schematic structural diagram of a second specific embodiment of the external contour preforming mold in the preforming tooling of FIG2 ;

[0058] FIG14 is a schematic structural diagram of the preforming mold with cavities on both sides in the preforming tooling of FIG2;

[0059] FIG15 is a schematic structural diagram of the preforming mold of FIG14 at a second angle;

[0060] FIG16 is a schematic structural diagram of the preforming mold in FIG14 at a third angle;

[0061] FIG17 is a schematic structural diagram of the preforming mold in FIG14 at a fourth angle;

[0062] FIG18 is a schematic structural diagram of the preforming mold in FIG14 at a fifth angle;

[0063] FIG19 is a schematic structural diagram of the support frame in the preforming tooling of FIG2;

[0064] FIG20 is a schematic structural diagram of the support frame of FIG19 at a second angle;

[0065] FIG21 is a schematic structural diagram of the support frame of FIG19 at a third angle;

[0066] FIG22 is a schematic structural diagram of the support frame of FIG19 at a fourth angle;

[0067] FIG23 is a schematic structural diagram of the fabric adjustment rod in the preforming tooling of FIG2;

[0068] FIG24 is a schematic structural diagram of a second angle of the fabric adjustment rod in FIG23;

[0069] FIG25 is a schematic structural diagram of the magnetic adsorption device in the preforming tooling of FIG2;

[0070] FIG26 is a schematic structural diagram of the magnetic adsorption device of FIG25 at a second angle;

[0071] FIG27 is a schematic structural diagram of the magnetic adsorption device of FIG25 at a third angle;

[0072] FIG28 is a schematic structural diagram of the magnetic adsorption device of FIG25 at a fourth angle;

[0073] FIG29 is a schematic structural diagram of the core mold adjustment seat in the preforming tooling of FIG2;

[0074] FIG30 is a schematic structural diagram of the preforming tooling in FIG2 at a second angle;

[0075] The reference numerals in FIG1 are described as follows:

[0076] 01'-preformed plate; a'-yarn feed port;

[0077] The reference numerals in Figures 2 to 30 are described as follows:

[0078] A-middle cavity preforming mold assembly; B-side cavity preforming mold assembly; C-external contour preforming mold assembly; 1-middle cavity preforming mold; 1'-external contour preforming mold; 1"-side cavity preforming mold; 11-preforming plate; 111-raised portion; 111a-inner cavity; 111b-core mold avoidance cavity; a-liquid reservoir; H-observation belt; 112-base plate; 11a-first connecting hole; 12-adjustment plate; 12a-core mold avoidance portion; 12b-yarn guide port; 12c-second connecting hole; 13-connecting piece; 14-glue injection port;

[0079] 2-support frame; 21-upper fixing portion; 22-lower fixing portion; 2a-fixing groove; 23-support beam; 221-protrusion; 2b-mounting groove; 2c-fixing hole; 24-front end plate;

[0080] 3- fabric adjustment rod; 31- vertical rod; 32- horizontal rod; 33- stopper; 3a- fabric seam;

[0081] 4 - magnetic adsorption device; 41 - magnetic mechanism; 42 - mounting seat; 42a - mounting cavity; 421 - closed end wall; 422 - side wall; 42b - threaded hole; 42c - third connecting hole; 43 - adjusting bolt; 44 - transition seat; 441 - first connecting portion; 442 - second connecting portion; 44a - fourth connecting hole; 451 - fixing bolt; 452 - fixing nut; 46 - connecting bolt;

[0082] 51-core mold support seat; 52-core mold adjustment seat; 52a-accommodation hole;

[0083] 6- fabric inlet plate; 61- extension plate; 6a- fabric inlet;

[0084] 01-product; 01a-middle cavity; 01b-side cavities; 02-core mold; 03-fabric. DETAILED DESCRIPTION

[0085] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0086] The term “plurality” herein generally refers to more than two; and when “plurality” is used to indicate the number of certain components, it does not indicate the relationship between the quantities of these components.

[0087] Please refer to Figures 2 to 4, Figure 2 is a structural schematic diagram of a specific embodiment of the preforming tooling provided by the present invention; Figure 3 is a schematic diagram of the preforming of the innermost layer of fabric in the middle cavity; Figure 4 is a structural schematic diagram of the product formed by the preforming tooling of the present invention.

[0088] The present invention provides a preforming tool, comprising three preforming die sets, which are arranged in sequence from front to back, namely, a middle cavity preforming die set A, a two-side cavity preforming die set B, and an outer contour preforming die set C, wherein:

[0089] The middle cavity preforming mold set A includes two preforming molds arranged in sequence from front to back. The middle cavity preforming mold set A is used to form the middle cavity 01a of the product 01;

[0090] The two-sided cavity preforming mold set B includes two preforming molds arranged in sequence from front to back. The two-sided cavity preforming mold set B is used to form the left and right cavities 01b of the product 01;

[0091] The outer contour preforming die set C includes four preforming dies arranged sequentially from front to back. The outer contour preforming die set C is used to form the outer contour of the product 01 .

[0092] It can be seen that the preforming tooling shown in Figure 1 can be used to form a three-cavity component as shown in Figure 4. It can be understood that in actual applications, depending on the type of product to be formed, the preforming tooling can be provided with at least one set of preforming mold groups. For example, if the desired product to be formed is a single-cavity component, the preforming tooling can include only the middle cavity preforming mold group A; if the desired product to be formed is a two-cavity component, the preforming tooling can include two sets of middle cavity preforming mold groups A and one set of outer contour preforming mold group C, and the two sets of middle cavity preforming mold groups A can be arranged side by side.

[0093] Furthermore, in the present invention, the preforming mold is specifically provided with a raised portion 111 raised from front to back, the raised portion 111 is an axially through trumpet-shaped portion, the cross-sectional area of ​​the raised portion 111 gradually decreases from front to back, the raised portion 111 has an inner cavity inside, the inner cavity includes a core mold accommodating area, and a fabric preforming area located on the periphery of the core mold accommodating area, the front side wall of the preforming mold has a core mold avoidance portion 12a, and a yarn guide port 12b extending circumferentially along the core mold avoidance portion 12a, the core mold avoidance portion 12a corresponds to the core mold accommodating area, the yarn guide port 12b corresponds to the fabric preforming area, the rear port of the inner cavity is the cavity outlet, and in each preforming mold in the same group from front to back, the circumferential length of the yarn guide port 12b gradually increases, and the cross-sectional area of ​​the cavity outlet gradually increases.

[0094] It can be understood that the shape of the cavity outlet should be adaptively designed according to the shape of the required molding part. For example, the intermediate cavity preforming mold group A is used to mold the intermediate cavity 01a of the product 01, and in the three-cavity component shown in Figure 4, the shape of the intermediate cavity 01a is a square hole. Therefore, the shape of each cavity outlet in the intermediate cavity preforming mold group A is a square hole, and the cross-section of the core mold 02 is square.

[0095] As set up above, the present invention proposes a new preforming tooling, wherein each preforming mold has a trumpet-shaped protrusion 111, and the interior of the protrusion 111 has an inner cavity, forming the peripheral wall of the inner cavity for preforming the outer contour of the fabric 03, and each preforming mold has a core mold avoidance portion 12a and a yarn guide port 12b, the core mold avoidance portion 12a is used to avoid the core mold 02, when working, the core mold 02 can pass through the core mold avoidance portion 12a of the preforming mold and be installed in the core mold accommodating area of ​​the inner cavity, the function of the core mold 02 is to preform the inner contour of the fabric 03, the area outside the core mold accommodating area is the fabric preforming area, and the yarn guide port 12b corresponds to the fabric preforming area, and is used As the fabric 03 passes through, the gap between the peripheral wall of the inner cavity and the outer peripheral wall of the core mold 02 can be adaptively set according to the thickness of the fabric 03. For example, if the thickness of a layer of fabric 03 is 1.5 mm, the gap between the peripheral wall of the inner cavity and the outer peripheral wall of the core mold 02 can be set to 2 mm with a certain margin reserved compared to the thickness of the fabric 03. During the preforming process, the fabric 03 enters the inner cavity from the yarn guide port 12b under the action of traction, is preformed under the action of the peripheral wall of the inner cavity and the core mold 02, and is finally led out from the cavity outlet. It can be understood that the fabric 03 led out from the cavity outlet will be wrapped around the outer periphery of the core mold 02, that is, each preforming mold can complete the preforming of one layer of fabric 03.

[0096] Furthermore, since the fabric 03 is wrapped around the outer periphery of the core mold 02 when it is led out from each preforming mold, the core mold 02 entering the rear preforming mold will be about one layer of fabric 03 thicker than the core mold 02 entering the adjacent front preforming mold. Correspondingly, the cavity outlet of the rear preforming mold will also be about one layer of fabric 03 thicker than the cavity outlet of the adjacent front preforming mold. In other words, in each preforming mold from front to back in the same group, the cross-sectional area of ​​the cavity outlet is gradually increased; at the same time, in order to ensure that each layer of fabric 03 has good In order to achieve a good molding effect and avoid problems such as displacement of the fabric 03 during the molding process, the circumferential length of the yarn guide port 12b in each preforming mold should match the width of the corresponding fabric 03, and the width of the outer fabric 03 must be larger than the width of the inner fabric 03. Therefore, in the preforming molds from front to back in the same group, the circumferential length of the yarn guide port 12b also gradually increases. In this way, after the inner fabric 03 is preformed, the adjacent outer fabric 03 can be preformed in turn through the adjacent rear end preforming mold, and so on, from the inner layer to the outer layer.

[0097] In combination with the above description, it can be seen that the preforming tooling of the present invention no longer adopts the flat preforming plate in the prior art, but adopts a trumpet-shaped preforming mold, and the trumpet extends along the traction direction of the fabric 03. The structural strength of the preforming mold is significantly increased, and it is not easy to be damaged by pulling during the pultrusion process; in addition, since each preforming mold is used to form a layer of fabric 03, the structural dimensions of each preforming mold, such as the size of the yarn guide port 12b, the size of the inner cavity 111a, etc. are all adapted to the size of the corresponding fabric 03. The fabric 03 is not easy to deviate when passing through the corresponding preforming mold, thereby improving the forming effect of the fabric 03 and ensuring the structural strength of the product after forming.

[0098] As shown in Figure 4, in the three-cavity component to be formed, the length of the outer contour is L1, L1 = 210 mm; the width of the outer contour is L2, L2 = 90 mm; the wall thickness of the outer contour is H1, H1 = 9 mm; the thickness of the inner rib is H2, H2 = 6 mm, and a 1.5 mm thick fabric 03 is selected during forming. When forming the middle cavity 01a and the left and right side cavities 01b, each cavity requires two layers of fabric 03, and four layers of fabric 03 are required when forming the outer contour. Therefore, in this embodiment, the middle cavity preforming mold group A and the two side cavity preforming mold group B have two preforming molds, and the outer contour preforming mold group C has four preforming molds, that is, each preforming mold is used to form a layer of fabric 03.

[0099] It can be understood that in actual applications, according to the different sizes of the required molded products and the different thicknesses of the fabric 03, there is no limit to the number of preforming molds included in each group of preforming mold groups, and each group of preforming molds can include one or more preforming molds. When each group of preforming molds includes multiple preforming molds, the multiple preforming molds can be arranged in sequence from front to back, with the frontmost preforming mold being used to preform the innermost layer of fabric 03, and the adjacent rear end preforming mold being used to preform the adjacent outer layer of fabric 03, and so on, forming in sequence from the inner layer to the outer layer.

[0100] Further, please refer to Figures 2 and 3. In the present invention, the preforming mold includes a preforming plate 11 and an adjustment plate 12. The middle part of the preforming plate 11 bulges from front to back to form the aforementioned bulge 111. The adjustment plate 12 is provided with a core mold avoidance portion 12a and a yarn guide port 12b. The yarn guide port 12b extends circumferentially along the core mold avoidance portion 12a. The adjustment plate 12 is connected to the front side wall of the preforming plate 11, and the connection position of the adjustment plate 12 is adjustable along the circumferential direction.

[0101] As can be seen from Figure 1, in the prior art, the position of the yarn guide is fixed, so the seam position of each layer of fabric is also fixed. When the seam position is exactly located on the stress-bearing surface of the formed product, the stress-bearing reliability of the product may be reduced. Based on this, the preforming mold of the present application adopts a split structure of a preforming plate 11 and an adjustment plate 12, and the position of the adjustment plate 12 connected to the preforming plate 11 is adjustable along the circumferential direction. In other words, the adjustment plate 12 and the preforming plate 11 adopt a detachable connection method. After being adjusted to the desired position along the circumferential direction, the adjustment plate 12 can be relatively fixed to the preforming plate 11. The connection position of the adjustment plate 12 is adjustable along the circumferential direction, and the position of the yarn guide 12b is adjustable along the circumferential direction. Correspondingly, the seam position of the fabric 03 is also adjustable along the circumferential direction. In this way, during the early testing process, the connection position of the adjustment plate 12 can be adjusted so that the seam position of the fabric 03 avoids the stress-bearing surface of the formed product, thereby improving the stress-bearing reliability of the product.

[0102] At the same time, in the preforming tooling of the present application, each preforming mold can realize the preforming of a layer of fabric 03, and the staff can understand the seam position of each layer of fabric 03. In this way, by adjusting the position of the yarn guide port 12b in each preforming mold, the seam position of each layer of fabric 03 can be staggered along the circumferential direction, thereby ensuring that the product after forming has no strength short board area in the circumferential direction, thereby improving the force reliability of the product.

[0103] It can be understood that, in practice, the center of the core mold avoidance portion 12a should also be the rotation center of the adjustment plate 12. In this way, when the position of the adjustment plate 12 is adjusted circumferentially, only the position of the yarn guide port 12b is adjusted, and the position of the core mold avoidance portion 12a remains unchanged, so as to facilitate the passage of the core mold 02.

[0104] As mentioned above, the position at which the adjustment plate 12 is connected to the preformed plate 11 is adjustable along the circumferential direction. Specifically in this embodiment, as shown in Figure 2, the front side wall of the preformed plate 11 is provided with a plurality of first connection holes 11a, and the first connection holes 11a are distributed along the circumferential direction. The adjustment plate 12 is correspondingly provided with a plurality of second connection holes 12c, and the second connection holes 12c are distributed along the circumferential direction. It also includes a connecting member 13, and the connecting member 13 passes through the corresponding first connection hole 11a and the second connection hole 12c to fix the preformed plate 11 and the adjustment plate 12. The connection is reliable and easy to disassemble and assemble.

[0105] In this embodiment, the preformed plate 11 and the adjustment plate 12 are secured together by three or four connectors 13. In practical applications, the number of connectors 13 is not limited, as long as the connection between the preformed plate 11 and the adjustment plate 12 is stable. Specifically, the connectors 13 can be bolts or the like.

[0106] In addition, in practice, the adjustment plate 12 and the preformed plate 11 are not limited to the fixing method of the above-mentioned connecting member 13. For example, a snap-in groove can be provided on the front side wall of the preformed plate 11, and the adjustment plate 12 is snapped into the snap-in groove and abuts against the front side wall of the preformed plate 11 to achieve relative fixation of the adjustment plate 12 and the preformed plate 11.

[0107] The plate-like structure located at the front end of the raised portion 111 in the preformed plate 11 is defined as the substrate portion 112. In actual applications, the preformed plate 11 can adopt an integral molding structure, that is, the substrate portion 112 and the raised portion 111 are inseparable. In this way, different types of preformed plates 11 can be prefabricated according to needs, and the cavity outlets in different types of preformed plates 11 have different shapes to meet the processing requirements of products with different cavity structures.

[0108] Alternatively, the substrate portion 112 and the raised portion 111 can be separate structures, and then fixed together in a detachable manner. Specifically, the substrate portion 112 is provided with a cavity entrance hole, and the raised portion 111 is fixed to the substrate portion 112 by a connecting member, such as a bolt, and corresponds to the position of the cavity entrance hole. When it is necessary to pre-form products with different cavity structures, it is only necessary to replace different raised portions 111. The substrate portion 112 can be reused, thereby improving the utilization rate of the substrate portion 112 and saving costs.

[0109] Alternatively, the raised portion 111 is a split structure along the axial direction, and is then fixed together in a detachable manner. Part of the structure at the axial front end of the raised portion 111 is integrally formed with the base plate portion 112, and part of the structure at the axial rear end of the raised portion 111 can be replaced according to the cavity structure of the required product. In this way, when it is necessary to preform products with different cavity structures, only part of the structure at the axial rear end of the raised portion 111 needs to be replaced, thereby improving the versatility of the preforming mold, further saving resources, and reducing costs.

[0110] Please refer to Figures 2, 5-8, Figure 5 is a schematic structural diagram of the middle cavity preforming mold in the preforming tooling of Figure 2; Figure 6 is a schematic structural diagram of the second angle of the preforming mold of Figure 5; Figure 7 is a schematic structural diagram of the third angle of the preforming mold of Figure 5; Figure 8 is a schematic structural diagram of the fourth angle of the preforming mold of Figure 5.

[0111] Figures 5 to 8 show the preforming mold in the intermediate cavity preforming mold group A, which is the intermediate cavity preforming mold 1. In the intermediate cavity preforming mold 1, an inner cavity 111a is formed inside the protrusion 111. The front end of the inner cavity 111a is the cavity entrance. The cavity entrance is circular, and the yarn guide port 12b is a matching arc-shaped hole. There is only one adjustment plate 12. In the adjustment plate 12, the core mold avoidance portion 12a is a hole-like structure and matches the shape of the cavity outlet.

[0112] The "matching" mentioned here means that in the projection plane parallel to the adjustment plate 12, the contour line of the yarn guide port 12b close to the outside can coincide with the contour line of the cavity entrance, which makes it easier to control the forming of the fabric 03, realize smooth traction of the fabric 03, enhance the continuous deformation of the fabric 03 during the traction process, and avoid problems such as offset and wrinkles of the fabric 03 during the pultrusion process.

[0113] In practical applications, the shape of the yarn guide opening 12b is not limited to a standard arc, and the contour line of the cavity entrance is not limited to a standard circle, as long as the corresponding position structure of the cavity entrance matches that of the yarn guide opening 12b.

[0114] Please refer to Figures 2, 9 to 13, Figure 9 is a structural schematic diagram of the external contour preforming mold in the preforming tooling of Figure 2; Figure 10 is a structural schematic diagram of the second angle of the preforming mold in Figure 9; Figure 11 is a structural schematic diagram of the third angle of the preforming mold in Figure 9; Figure 12 is a structural schematic diagram of the fourth angle of the preforming mold in Figure 9; Figure 13 is a structural schematic diagram of the second specific embodiment of the external contour preforming mold in the preforming tooling of Figure 2.

[0115] Figures 9 to 12 show the preforming mold in the external contour preforming mold group, which is the external contour preforming mold 1'. In the external contour preforming mold 1', an inner cavity 111a is formed inside the protrusion 111, and the front port of the inner cavity 111a is the cavity entrance. The cavity entrance is circular, and there is one adjustment plate 12. In the adjustment plate 12, the core mold avoidance portion 12a is a hole-shaped structure and matches the shape of the cavity outlet. The adjustment plate 12 is provided with two yarn guide ports 12b, which are located on the left and right sides of the core mold avoidance portion 12a. The yarn guide ports 12b are arc-shaped holes that match the contour line of the cavity entrance.

[0116] Similarly, the "matching" mentioned here means that within the projection plane parallel to the adjustment plate 12, the outer contour line of the yarn guide opening 12b can coincide with the contour line of the cavity entrance. This makes it easier to control the forming of the fabric 03, achieve smooth traction of the fabric 03, enhance the continuous deformation of the fabric 03 during the traction process, and avoid problems such as offset and wrinkling of the fabric 03 during the pultrusion process. At the same time, the adjustment plate 12 is provided with two yarn guide openings 12b, which are located on the left and right sides of the core mold avoidance portion 12a. In this way, the fabric 03 on both sides will be formed separately and then butted together in the middle to form a whole, completing the pre-forming of a layer of fabric 03.

[0117] Furthermore, since each preforming mold in the present application adopts a trumpet-shaped tube, each preforming mold occupies a relatively large space in the front-to-back direction. Therefore, in order to make the overall structure of the tooling more compact, shorten the length of the core mold 02, and ensure the concentricity of the core mold 02, the preforming molds will be densely installed, that is, the interval between two adjacent preforming molds is relatively small, but this will bring inconvenience to the staff in observing the closing state of the fabric 03.

[0118] Based on this, as shown in Figures 1 and 13, in this embodiment, the number of external contour preforming molds 1' is four. From front to back, the first external contour preforming mold 1' and the third external contour preforming mold 1' are disconnected along the circumferential direction, and the disconnection forms an observation zone H.

[0119] By configuring the observation belt H as described above, the closing state of fabric 03 can be better observed without increasing the core mold length, ensuring a compact arrangement of the preforming molds and leaving ample adjustment space for the rear-end magnetic adsorption device (described in detail later). Simultaneously, the second and fourth outer contour preforming molds 1' and 1' are circumferentially closed, providing circumferential constraints on fabric 03. Combined with the rear-end traction force, this ensures the preforming effect of fabric 03.

[0120] Of course, in practical applications, there is no limit to the number of external contour preforming dies 1 ′. When there are multiple external contour preforming dies 1 ′, it is sufficient as long as the alternate external contour preforming dies 1 ′ are disconnected along the circumferential direction.

[0121] As shown in Figure 9, in the external contour preforming mold 1' of the present invention, the raised portion 111 is provided with a glue injection port 14 at one end close to the cavity outlet. As shown in Figure 13, the inner wall of the raised portion 111 is provided with a liquid storage tank a at one end close to the cavity outlet. The liquid storage tank a extends along the circumference of the raised portion 111, and the glue injection port 14 is connected to the liquid storage tank a.

[0122] As configured above, reinforcing materials such as resin can enter the liquid storage tank a inside the inner cavity 111a through the glue injection port 14, and extend along the circumference of the raised portion 111 in the liquid storage tank a to fully soak the fabric 03, thereby ensuring the stable quality of the pultruded product.

[0123] As can be seen from FIG13 , in this embodiment, a plurality of liquid reservoirs a are provided inside the raised portion 111. The liquid reservoirs a are spaced apart circumferentially, and each liquid reservoir a is connected to at least one glue injection port 14. It will be appreciated that in actual applications, the liquid reservoirs a may also be interconnected to form a single unit, which further facilitates the circumferential flow of the reinforcing material.

[0124] In addition, the present invention provides a glue injection port 14 on the external contour preforming mold 1', and resin and other reinforcing materials can be infiltrated from the outside to the inside through the glue injection port 14; however, when the thickness of the cavity is large, the reinforcing material may not be able to fully penetrate inward, resulting in the inner layer of fabric 03 cannot be fully infiltrated. At this time, a glue injection port can be provided on the core mold 02, and resin and other reinforcing materials can be infiltrated from the inside to the outside through the glue injection port, ensuring that the inner layer of fabric 03 can also be fully infiltrated.

[0125] Please refer to Figure 2, Figure 14-Figure 18, Figure 14 is a schematic structural diagram of the preforming molds with cavities on both sides of the preforming tooling in Figure 2; Figure 15 is a schematic structural diagram of the second angle of the preforming mold in Figure 14; Figure 16 is a schematic structural diagram of the third angle of the preforming mold in Figure 14; Figure 17 is a schematic structural diagram of the fourth angle of the preforming mold in Figure 14; Figure 18 is a schematic structural diagram of the fifth angle of the preforming mold in Figure 14.

[0126] Figures 14 to 18 show the preforming mold in the double-sided cavity preforming mold group, which is a double-sided cavity preforming mold 1". In the double-sided cavity preforming mold 1", a core mold avoidance cavity 111b and two inner cavities 111a are formed inside the raised portion 111. The two inner cavities 111a are connected to the left and right sides of the core mold avoidance cavity 111b. There are two adjustment plates 12, and the adjustment plates 12 and the inner cavities 111a are arranged in a one-to-one correspondence. The adjustment plate 12 is provided with a notch groove with an open end, and the notch groove forms a partial structure of the core mold avoidance portion 12a. When the adjustment plate 12 is connected to the preforming plate 11, the notch groove faces the core mold avoidance cavity 111b.

[0127] In this way, during operation, the core mold 02 used to form the middle cavity passes through the core mold avoidance cavity 111b, and the core mold 02 used to form the cavities on both sides passes through the inner cavity 111a one by one, and the fabrics on the left and right sides pass through the corresponding yarn guide ports 12b and are pre-formed under the action of the rear end traction force and the inner cavity 111a.

[0128] As can be seen from Figures 15 and 16, the cavity entrance of this embodiment is not a regular circle. In the projection plane parallel to the adjustment plate 12, the contour line of the cavity entrance includes an arc segment close to the outside, a vertical extension segment close to the inside, and two inclined extension segments. The inclined extension segments connect the corresponding ends of the arc segment and the vertical extension segment. The contour line of the cavity entrance and the contour line of the core mold avoidance cavity 111b share the vertical extension segment.

[0129] It can be seen that the shape of the contour line of the cavity entrance is not limited, as long as it is at least an arc shape that matches the corresponding area of ​​the yarn guide port 12b.

[0130] Please continue to refer to Figure 2, Figure 19-Figure 22, Figure 19 is a structural schematic diagram of the support frame in the preformed tooling in Figure 2; Figure 20 is a structural schematic diagram of the support frame in Figure 19 at the second angle; Figure 21 is a structural schematic diagram of the support frame in Figure 19 at the third angle; Figure 22 is a structural schematic diagram of the support frame in Figure 19 at the fourth angle.

[0131] The preforming tooling of the present invention also includes a support frame 2, which includes an upper fixed portion 21 and a lower fixed portion 22. The opposite side walls of the upper fixed portion 21 and the lower fixed portion 22 are correspondingly provided with fixed grooves 2a, which extend laterally along the support frame 2. The fixed grooves 2a pass through the lateral end walls of the upper fixed portion 21 and the lower fixed portion 22. The preforming mold is installed between the upper fixed portion 21 and the lower fixed portion 22. The upper and lower ends of the preforming plate 11 are inserted into the corresponding fixed grooves 2a and can slide along the extension direction of the fixed grooves 2a.

[0132] In this way, when installing the preforming mold, the upper and lower ends of the preforming mold can be inserted into the corresponding fixing groove 2a and slide along the extension direction of the fixing groove 2a until each preforming mold is in the required position, and then the core mold 02 is installed.

[0133] It can be understood that in the installed state, the core mold 02 is inserted into the inner cavity 111a of each pre-forming mold. Since the core mold avoidance part 12a is close in size to the core mold 02, there are many inconveniences when installing the core mold 02; in addition, when the pre-forming mold needs to be adjusted, the core mold 02 needs to be disassembled first, and then the pre-forming mold needs to be adjusted. After that, the core mold 02 needs to be reinstalled and adjusted, resulting in a longer construction period.

[0134] Based on this, in order to facilitate the installation and adjustment of the position of the preforming mold, in the intermediate cavity preforming mold 1 and the outer contour preforming mold 1', the preforming plate 11 can be cut in half by wire cutting after the overall processing is completed, that is, the preforming plate 11 includes a first plate portion and a second plate portion arranged along the left and right directions, the first plate portion has a first notch cavity, and the second plate portion has a second notch cavity. After the first plate portion and the second plate portion are spliced ​​together, the first notch cavity and the second notch cavity enclose to form the aforementioned inner cavity 111a.

[0135] In this way, during the installation process, the height size position of the core mold 02 can be adjusted first, and then the first plate portion and the second plate portion are inserted into the two fixed grooves 2a on the left and right, and moved in the direction of approaching each other until the two are pieced together, and then the first plate portion and the second plate portion are connected through the adjustment plate 12 to form a complete preformed plate 11; when the preformed plate 11 needs to be adjusted and replaced, there is no need to disassemble the core mold 02, the adjustment plate 12 can be detached, and then the first plate portion and the second plate portion can be quickly removed by sliding directly outward along the fixed groove 2a, thereby improving the convenience of the adjustment operation.

[0136] In the double-sided cavity preforming mold 1", the preforming plate 11 includes a first plate portion and a second plate portion arranged in the up-down direction. The first plate portion and the second plate portion are correspondingly provided with a first notch cavity located in the middle, and second notch cavities located on the left and right sides of the first notch cavity. The corresponding first notch cavities enclose a core mold avoidance cavity 111b, and the corresponding second notch cavities enclose an inner cavity 111a.

[0137] At the same time, the fixing groove 2a for installing the cavity preforming mold 1" on both sides has a preset depth in the height direction. The upper end of the first plate is slidably installed in the fixing groove 2a at the upper end, and the first plate can move relative to the fixing groove 2a in the height direction. When the first plate moves upward to the disengaged position, the first plate and the core mold 02 can be staggered in the height direction.

[0138] The lower end of the second plate is slidably mounted in the fixing groove 2a at the lower end. The second plate can move in the height direction relative to the fixing groove 2a. When the second plate moves downward to the disengaged position, the second plate and the core mold 02 can be staggered in the height direction.

[0139] It also includes a connecting component, one end of which is connected to the support frame 2, and the other end of the connecting component is detachably connected to the first plate portion or the second plate portion.

[0140] As set up above, during the installation process, after adjusting the height size position of the core mold 02, the first plate portion and the second plate portion can be inserted into the corresponding fixing groove 2a one above and one below. When the two are opposite to each other, the first plate portion moves downward and the second plate portion moves upward until the two are pieced together, and then the first plate portion and the second plate portion are connected by the adjustment plate 12 to form a complete preformed plate 11; finally, the first plate portion or the second plate portion is connected by a connecting component so that the cavity preformed mold 1" on both sides can be at the required height.

[0141] When the preformed plate 11 needs to be adjusted or replaced, there is no need to disassemble the core mold 02. You can first release the connection between the connecting component and the first plate part / second plate part, and detach the adjustment plate 12; then, push the first plate part upward and push the second plate part downward. When the first plate part and the core mold 02 are staggered in the height direction, and the second plate part and the core mold 02 are staggered in the height direction, you can slide outward along the fixing groove 2a to quickly remove the first plate part and the second plate part, thereby improving the convenience of the adjustment operation.

[0142] Among them, the structure of the connecting component is not limited. For example, the connecting component can be a support rod, the lower end of the support rod is fixed to the lower fixed part 22 of the support frame 2, and the upper end of the support rod has a support wall, which can support the lower side wall of the second plate portion, thereby playing a role in vertically limiting the cavity preforming molds 1" on both sides. Alternatively, the connecting component can be a hanger, the upper end of the hanger is fixed to the upper fixed part 21 of the support frame 2, and the lower end of the hanger forms a connecting end. The connecting end and the second plate portion can be fixed by magnetic attraction, or by bolts and other connecting parts, which also play a role in vertically limiting the cavity preforming molds 1" on both sides.

[0143] Please continue to refer to Figure 2, Figure 23-Figure 24, Figure 23 is a structural diagram of the fabric adjustment rod in the preformed tooling in Figure 2; Figure 24 is a structural diagram of the second angle of the fabric adjustment rod in Figure 23

[0144] As can be seen from the above, during operation, the fabric 03 will enter from the front fabric inlet plate 6, and will gradually be formed through the corresponding pre-forming mold under the action of the traction force at the rear end. However, the distance between the fabric inlet plate 6 and the pre-forming mold near the rear end is relatively large, and the middle part of the fabric 03 will inevitably sag under the action of its own weight. At this time, under the gathering effect of the trumpet tube and the traction force at the rear end, the fabric 03 is easily damaged by pultrusion, resulting in pultrusion failure.

[0145] Based on this, the preforming tooling of the present invention also includes five fabric adjustment rods 3, the fabric adjustment rods 3 are provided with cloth seams 3a extending in the vertical direction, the fabric adjustment rods 3 are installed on the support frame 2, and the fabric adjustment rods 3 are located one by one on the front side of the five preforming molds at the rear end, and the installation position of the fabric adjustment rods 3 is adjustable along the horizontal direction of the support frame 2.

[0146] As set up above, during operation, the fabric 03 will pass through the cloth seam 3a of the corresponding fabric adjusting rod 3 and then enter the yarn guide port 12b of the corresponding preforming mold. The extension direction of the fabric 03 will be restricted by the fabric adjusting rod 3 to prevent different fabrics 03 from interfering with each other. At the same time, by adjusting the lateral position of the fabric adjusting rod 3, an outward tensioning force can be provided to the fabric 03 to prevent the fabric 03 from sagging, thereby preventing the fabric 03 from being damaged during the pultrusion process, and ensuring smooth pultrusion.

[0147] As shown in Figures 1, 19, and 23-24, the fabric adjustment rod 3 includes a vertical rod 31 and a horizontal rod 32 connected to the upper end of the vertical rod 31. A fabric seam 3a is provided on the vertical rod 31, and a stopper 33 is provided at the lower end of the vertical rod 31. In the support frame 2, the lower fixing portion 22 is provided with transversely extending protrusions 221 at both ends. The protrusions 221 are provided with mounting slots 2b. The outer ends of the mounting slots 2b are open and extend transversely. The upper fixing portion 21 is provided with a transversely extending fixing hole 2c. In the installed state, the lower end of the vertical rod 31 is inserted into the corresponding mounting slot 2b and can slide along the extension direction of the mounting slot 2b. The stopper 33 abuts the upper side wall of the lower fixing portion 22, and the horizontal rod 32 is inserted into the corresponding fixing hole 2c and can slide along the extension direction of the fixing hole 2c. In this way, the fixing hole 2c and the mounting slot 2b both serve as guides during the adjustment process.

[0148] It can be understood that in actual applications, the specific structure of the fabric adjustment rod 3 is not limited to the above-mentioned embodiment. For example, the fabric adjustment rod 3 only includes a vertical rod portion 31, and blocks 33 are provided at the upper and lower ends of the vertical rod portion 31. In the support frame 2, the upper fixed portion 21 and the lower fixed portion 22 are both provided with a protrusion 221 extending in the transverse direction. The protrusion 221 is provided with a mounting groove 2b. The outer end of the mounting groove 2b is open and extends in the transverse direction. In the installed state, the upper and lower ends of the vertical rod portion 31 are inserted into the corresponding mounting groove 2b and can slide along the extension direction of the mounting groove 2b. The block 33 abuts against the upper side wall of the upper fixed portion 21 or the lower fixed portion 22, thereby playing a role of limiting the vertical direction.

[0149] In this embodiment, the number of fabric adjusting rods 3 is five. It can be understood that in actual applications, the number of fabric adjusting rods 3 is not limited. For example, when the cavity thickness of the required molded product is thin, the number of layers of fabric required during preforming is also small, the spacing between the fabric inlet plate 6 and the preforming mold is small, and the fabric drooping is not obvious, it is feasible not to set the fabric adjusting rod 3. When the fabric adjusting rod 3 is set, the number of fabric adjusting rods 3 can be at least one.

[0150] Please continue to refer to Figure 2, Figure 25-Figure 28, Figure 25 is a structural schematic diagram of the magnetic adsorption device in the preforming tooling of Figure 2; Figure 26 is a structural schematic diagram of the second angle of the magnetic adsorption device of Figure 25; Figure 27 is a structural schematic diagram of the third angle of the magnetic adsorption device of Figure 25; Figure 28 is a structural schematic diagram of the fourth angle of the magnetic adsorption device of Figure 25.

[0151] The preforming tooling in the present invention also includes a core mold fixing part and a magnetic adsorption device 4. The core mold fixing part is installed on the support frame 2 and is used to fix the core mold 02. The magnetic adsorption device 4 is installed at the upper rear end of the support frame 2. The magnetic adsorption device 4 includes a magnetic mechanism 41. The magnetic mechanism 41 is used to magnetically adsorb the tail of the core mold 02. The position of the magnetic mechanism 41 is adjustable along the height direction.

[0152] Since the tail of the core mold in the preforming tooling of the prior art is in a suspended state, the supporting force of the core mold is insufficient, resulting in a large extrusion force during pultrusion, which aggravates the wear and damage of the preforming tooling.

[0153] Based on this, the preforming tooling of the present invention is additionally provided with a magnetic adsorption device 4, wherein the magnetic mechanism 41 is used to magnetically adsorb the tail of the core mold 02, providing a certain lifting force for the tail of the core mold 02. In order to ensure the concentricity of the core mold 02, it is necessary to adjust the height of the tail of the core mold 02, that is, it is necessary to adjust the magnitude of the magnetic adsorption force provided by the magnetic mechanism 41. Therefore, in the present invention, the position of the magnetic mechanism 41 is set to be adjustable along the height direction, that is, the height of the magnetic mechanism 41 from the core mold 02 is adjustable, thereby achieving the adjustable magnitude of the magnetic adsorption force provided by the magnetic mechanism 41, ensuring that the magnetic adsorption force generated by the magnetic mechanism 41 is closer to the preset size, ensuring the concentricity of the core mold 02, reducing the resistance in pultrusion molding, and slowing down the wear and damage of the preforming tooling.

[0154] Specifically in this embodiment, the magnetic adsorption device 4 also includes a mounting seat 42 and an adjusting component. The mounting seat 42 has a mounting cavity 42a with an opening at the lower end. The adjusting component is connected to the closed end wall 421 of the mounting cavity 42a. The lower end wall of the adjusting component forms a supporting wall. The supporting wall is located inside the mounting cavity 42a. The height of the supporting wall is adjustable. The upper rear end of the support frame 2 has a supporting beam 23. The support beam 23 is located inside the mounting cavity 42a. The upper side wall of the support beam 23 abuts against the support wall. The magnetic mechanism 41 is connected to the outer side wall of the mounting seat 42, and the connection position is adjustable along the height direction.

[0155] As set up above, since the height of the support wall is adjustable, the installation height of the mounting seat 42 relative to the support beam 23 can be adjusted by adjusting the height of the support wall, thereby achieving preliminary adjustment of the height of the magnetic mechanism 41; further, the position at which the magnetic mechanism 41 is connected to the mounting seat 42 is also adjustable along the height direction, thereby achieving further adjustment of the height of the magnetic mechanism 41, ensuring that the magnetic adsorption force generated by the magnetic mechanism 41 is closer to the preset size, and ensuring the concentricity of the product.

[0156] In this embodiment, a threaded hole 42b is provided on the closed end wall 421 of the installation cavity 42a, and the adjustment component includes an adjustment bolt 43, which is screwed into the corresponding threaded hole 42b.

[0157] In this way, the lower end wall of the adjusting bolt 43 forms a supporting wall. When the installation height of the mounting seat 42 needs to be adjusted, the supporting wall can be raised or lowered relative to the mounting seat 42 by turning the adjusting bolt 43. Specifically, when the supporting wall is raised relative to the height of the mounting seat 42, in the installed state, the supporting beam 23 is close to the closed end of the mounting cavity 42a, and the installation height of the mounting seat 42 is reduced; when the supporting wall is lowered relative to the height of the mounting seat 42, in the installed state, the supporting beam 23 is close to the open end of the mounting cavity 42a, and the installation height of the mounting seat 42 is increased.

[0158] It can be seen that the installation height of the mounting seat 42 is adjusted by screwing the adjusting bolt 43 and the threaded hole 42b, which is easy to operate and the installation position of the mounting seat 42 is more reliable.

[0159] As can be seen from Figure 25, in this embodiment, the closed end wall 421 of the installation cavity 42a is provided with multiple threaded holes 42b, and the multiple threaded holes 42b are distributed at intervals. The adjustment component includes five adjusting bolts 43, and the five adjusting bolts 43 are distributed at intervals in the closed end wall 421.

[0160] In practical applications, there is no limit on the number of threaded holes 42b provided on the closed end wall 421 of the mounting cavity 42a, and there is no limit on the number of adjustment components including the adjustment bolts 43, as long as the installation stability of the mounting seat 42 can be guaranteed.

[0161] In addition, in actual applications, the adjustment component can also be implemented in other ways, such as the adjustment component includes multiple pads and connecting parts, each pad has a different thickness, and the upper side wall of each pad is provided with a threaded hole, and the closed end wall 421 of the mounting cavity 42a is provided with a matching through-hole, and the connecting part passes through the corresponding through-hole and is screwed and fixed with the threaded hole, so that the pad is detachably connected to the inner side of the closed end wall 421 of the mounting cavity 42a, and the lower side wall of the pad forms a support wall. When it is necessary to adjust the installation height of the mounting seat 42, different pads can be replaced. Specifically: when the installation height of the mounting seat 42 needs to be increased, a pad with a larger thickness can be replaced, and the height of the support wall relative to the mounting seat 42 is lowered. In the installed state, the support beam 23 is close to the open end of the mounting cavity 42a, and the installation height of the mounting seat 42 is increased; when the installation height of the mounting seat 42 needs to be reduced, a pad with a smaller thickness can be replaced, and the height of the support wall relative to the mounting seat 42 is increased. In the installed state, the support beam 23 is close to the closed end of the mounting cavity 42a, and the installation height of the mounting seat 42 is reduced.

[0162] As can be seen from FIG. 25 , in this embodiment, there are two magnetic mechanisms 41 , and the two magnetic mechanisms 41 are respectively connected to the outer sides of the two side walls 422 of the installation cavity 42 a .

[0163] In practical applications, there is no limit to the number of magnetic mechanisms 41, such as at least one magnetic mechanism 41. In the present application, two magnetic mechanisms 41 are provided, and the magnetic adsorption device 4 can generate double the adsorption force to ensure reliable adsorption of the product.

[0164] As mentioned above, the magnetic mechanism 41 is connected to the outer side of the side wall 422 of the mounting cavity 42a. Specifically in this embodiment, as shown in Figure 25, the magnetic adsorption device 4 also includes a transition seat 44, and the magnetic mechanism 41 is fixed to the transition seat 44. The transition seat 44 is connected to the mounting seat 42. The connection position of the transition seat 44 is adjustable along the height direction, and the transition seat 44 can also be fixed relative to the mounting seat 42 when adjusted to a preset height.

[0165] In this way, the transition seat 44 can play a transfer role, and the magnetic mechanism 41 is fixed to the transition seat 44, with a reliable connection, ensuring the stable installation of the magnetic mechanism 41; at the same time, by adjusting the connection position of the transition seat 44, the connection height of the magnetic mechanism 41 can be indirectly adjusted, which is convenient to operate.

[0166] Among them, the transition seat 44 includes a first connecting part 441 and a second connecting part 442 connected at right angles, the first connecting part 441 extends horizontally, and the second connecting part 442 extends vertically upward. The magnetic mechanism 41 is fixed to the lower side wall of the first connecting part 441, and the second connecting part 442 is used to connect with the mounting seat 42. Specifically: the side wall 422 of the mounting cavity 42a is provided with multiple third connecting hole groups, and the multiple third connecting hole groups are distributed along the height direction. Each third connecting hole group has one or more third connecting holes 42c, and the multiple third connecting holes 42c are distributed along the horizontal direction. The second connecting part 442 is provided with at least one fourth connecting hole 44a, and also includes at least one fixing member, which passes through the corresponding fourth connecting hole 44a and passes through any third connecting hole 42c to fix the second connecting part 442 and the mounting seat 42.

[0167] In this way, when it is necessary to adjust the connection height of the magnetic mechanism 41, the fixing part can be detached first. At this time, the height of the magnetic mechanism 41 can be adjusted. When the magnetic mechanism 41 moves to the required height, the fixing part is passed through the fourth connection hole 44a and the third connection hole 42c of the corresponding height, and the second connection part 442 and the mounting seat 42 are re-fixed to achieve the connection height adjustment of the magnetic mechanism 41.

[0168] Of course, in actual applications, the connection method between the second connecting portion 442 and the mounting seat 42 is not limited to the above embodiment. For example, the second connecting portion 442 and the mounting seat 42 can also be connected by magnetic attraction, which is reliable and easy to adjust.

[0169] As shown in FIG. 25 , in this embodiment, the fixing member includes a fixing bolt 451 and a fixing nut 452 . The fixing bolt 451 passes through the corresponding fourth connection hole 44 a and the third connection hole 42 c , and the fixing nut 452 is screwed and fixed to the fixing bolt 451 .

[0170] In practical applications, the third connection hole 42c and the fourth connection hole 44a can both be threaded holes. In this case, the fixing member can only include a fixing bolt 451, and the fixing bolt 451 and the corresponding third connection hole 42c and fourth connection hole 44a are all screwed and fixed.

[0171] In this embodiment, the second connection part 442 extends vertically upward, and the magnetic mechanism 41 is fixed to the lower side wall of the first connection part 441. In actual application, it is also feasible that the second connection part 442 extends vertically downward, and the magnetic mechanism 41 is fixed to the upper side wall of the first connection part 441.

[0172] As mentioned above, the magnetic mechanism 41 is fixed to the transition seat 44. Specifically, the magnetic mechanism 41 and the transition seat 44 can be fixed by welding, clamping, bonding, etc., or can be fixed by a connecting piece. Specifically, the first connecting part 441 is provided with at least one through hole, and the magnetic mechanism 41 is correspondingly provided with at least one threaded connection hole. The connecting piece includes a connecting bolt 46, and the connecting bolt 46 passes through the inside of the through hole and is screwed and fixed with the corresponding threaded connection hole.

[0173] It can be seen that in this embodiment, there are two connecting bolts 46. In practical applications, the specific number of connecting bolts 46 is not limited as long as the connection stability of the magnetic mechanism 41 can be ensured.

[0174] It can be understood that in actual applications, the magnetic adsorption device 4 is not limited to the implementation method of this embodiment. For example, the magnetic adsorption device 4 can be changed to the form of an electromagnet, and the size of the magnetic adsorption force can be automatically adjusted according to the length of the core mold 02 to ensure the concentricity of the core mold 02, greatly reducing the labor of adjusting the mold, improving production efficiency, and realizing the automation of pultrusion.

[0175] Please refer to Figure 2 and Figure 29. Figure 29 is a structural diagram of the core mold adjustment seat in the preforming tooling of Figure 2.

[0176] In the present invention, the core mold fixing part includes a core mold support seat 51 located at the front end of the support frame 2, and a core mold adjustment seat 52 located at the rear end of the support frame 2. The core mold adjustment seat 52 has a receiving hole 52a. When working, the core mold 02 used to form the middle cavity has its front end fixed to the front end plate 24 of the support frame 2 through connecting parts, such as bolts, etc., its middle part is supported on the core mold support seat 51, and its rear end is inserted into the receiving hole 52a of the core mold adjustment seat 52; the core mold 02 used to form the cavities on both sides has its front end supported on the core mold support seat 51, and is fixed to the core mold support seat 51 through connecting parts, such as bolts, etc., and its rear end is inserted into the receiving hole 52a of the core mold adjustment seat 52.

[0177] When the core mold 02 is in the theoretical installation state, there is a preset gap between the inner circumferential wall of the accommodating hole 52a and the corresponding end wall of the core mold 02. Therefore, by measuring the distance between the inner circumferential wall of the accommodating hole 52a and the corresponding end wall of the core mold 02, it is possible to determine whether the core mold 02 is in the theoretical installation state, so as to adjust the position of the core mold 02 in time to ensure that the subsequent pultrusion work proceeds smoothly.

[0178] As can be seen from Figure 29, in this embodiment, the lower end of the core mold adjustment seat 52 is provided with two connecting ears, and the connecting ears are provided with connecting holes. The lower fixing part 22 of the support frame 2 is correspondingly provided with threaded holes, and also includes connecting parts, such as screws, etc. The connecting parts pass through the corresponding through holes and are screwed with the corresponding threaded holes to achieve the fixation of the core mold adjustment seat 52 and the support frame 2.

[0179] Please continue to refer to Figures 2 and 30. Figure 30 is a structural diagram of the preforming tooling in Figure 2 at a second angle.

[0180] In the preforming tooling of the present invention, the front end plate 24 of the support frame 2 is provided with a plurality of strip holes, which extend in the vertical direction, and the length of the strip holes gradually extends from the middle to the two ends; two extension plates 61 are connected to the two ends of the front end plate 24, and the two extension plates 61 are also provided with a plurality of strip holes, which extend in the vertical direction. The front end plate 24 and the two extension plates 61 at both ends together constitute the fabric inlet plate 6, and the strip holes form the fabric inlet 6a, and each yarn guide port 12b is arranged in a one-to-one correspondence with one of the fabric inlets 6a.

[0181] Thus, during operation, the fabric enters the preforming tooling through the fabric inlet 6a and then enters the corresponding preforming mold through the corresponding yarn guide port 12b. Simultaneously, the length of the fabric inlet 6a in the front end plate 24 gradually increases from the middle toward the ends, allowing the fabric inlet 6a to better match the corresponding fabric and ensure that the fabric does not shift during the preforming process.

[0182] At the same time, it can be seen from Figure 2 that in this embodiment, the front end plate 24 and the extension plate 61 are fixedly connected by connecting parts such as bolts, and the connection is reliable. When different products need to be preformed, different extension plates 61 can be replaced according to needs, thereby improving the versatility of the preforming tooling of the present invention.

[0183] It can be understood that the fabric inlet plate 6 is not limited to the combination of the above-mentioned front end plate 24 and the extension plate 61. For example, the fabric inlet plate 6 can be a separate plate-like structure. The fabric inlet plate 6 is installed on the support frame 2 and is located on the front side of each preforming mold. The support frame 2 is not provided with a front end plate 24 to avoid interference with the fabric.

[0184] The present invention also provides a preforming method, based on the aforementioned preforming tooling. In the same preforming mold group, each preforming mold preforms a layer of fabric. During operation, the frontmost preforming mold preforms the innermost layer of fabric. After the innermost layer of fabric is preformed, the adjacent rear end preforming mold preforms the adjacent outer layer of fabric, and so on, forming from the inner layer to the outer layer in sequence.

[0185] The preforming method of the present invention is based on the aforementioned preforming tooling, and therefore has the same technical effects as the aforementioned preforming tooling, which will not be described in detail here.

[0186] The above describes in detail the preforming tooling and preforming method provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above examples is intended only to facilitate understanding of the method and core concepts of the present invention. It should be noted that those skilled in the art may make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A preform tool, characterized in that: It comprises at least one group of preforming mold sets, each group of the preforming mold sets has one or more preforming molds, the plurality of preforming molds are arranged in sequence from front to back, and the preforming molds in the same group are used for forming the same part structure of the product, The preforming mold has a raised portion protruding from front to back, and the raised portion is axially through-shaped trumpet tube, and the cross-sectional area of ​​the raised portion gradually decreases from front to back. The interior of the raised portion has an inner cavity, and the inner cavity includes a core mold accommodating area and a fabric preforming area located on the periphery of the core mold accommodating area. The front side wall of the preforming mold has a core mold avoidance portion and a yarn guide port extending circumferentially along the core mold avoidance portion, the core mold avoidance portion corresponds to the core mold accommodating area, and the yarn guide port corresponds to the fabric preforming area. The rear port of the inner cavity is the cavity outlet, and in each of the preforming molds in the same group from front to back, the circumferential length of the yarn guide port gradually increases, and the cross-sectional area of ​​the cavity outlet gradually increases.

2. The preforming tool according to claim 1, characterized in that: The preforming mold includes a preforming plate and an adjustment plate. The middle part of the preforming plate protrudes from front to rear to form the protruding part. The adjustment plate is provided with the core mold avoidance part and the yarn guide port. The adjustment plate is connected to the front side wall of the preforming plate, and the connection position of the adjustment plate is adjustable along the circumferential direction.

3. The preforming tool according to claim 1, characterized in that: The yarn guide port is an arc-shaped hole, the front end of the inner cavity is the cavity entrance, and the contour line of the cavity entrance is a matching arc at least at a position corresponding to the yarn guide port.

4. The preforming tooling according to claim 2, characterized in that: The preforming mold group includes an intermediate cavity preforming mold group, the preforming mold in the intermediate cavity preforming mold group is an intermediate cavity preforming mold, in the intermediate cavity preforming mold, the inner cavity is formed inside the protrusion, the front port of the inner cavity is the cavity inlet, the cavity inlet is circular, and in the adjustment plate, the core mold avoidance portion is a hole-shaped structure and matches the shape of the cavity outlet.

5. The preforming tool according to claim 4, characterized in that: The preforming mold group includes an external contour preforming mold group, the preforming mold in the external contour preforming mold group is an external contour preforming mold, in the external contour preforming mold, the inner cavity is formed inside the protrusion, the front port of the inner cavity is the cavity entrance, the cavity entrance is circular, in the adjustment plate, the core mold avoidance portion is a hole-shaped structure, and matches the shape of the cavity exit, the adjustment plate is provided with two yarn guide ports, and the two yarn guide ports are located on the left and right sides of the core mold avoidance portion.

6. The preforming tool according to claim 5, characterized in that: In the external contour preforming die set, the number of the external contour preforming dies is plural, and the alternate external contour preforming dies are disconnected along the circumferential direction, and the disconnected positions form observation zones.

7. The preforming tool according to claim 5, characterized in that: The raised portion is provided with a glue injection port at one end close to the cavity outlet, and the inner wall of the raised portion is provided with a liquid storage tank at one end close to the cavity outlet. The liquid storage tank extends along the circumference of the raised portion, and the glue injection port is connected to the liquid storage tank.

8. The preforming tool according to claim 5, characterized in that: In the intermediate cavity preforming mold and the outer contour preforming mold, the preforming plate includes a first plate portion and a second plate portion arranged in the left-right direction, the first plate portion has a first missing cavity, the second plate portion has a second missing cavity, and after the first plate portion and the second plate portion are assembled, the first missing cavity and the second missing cavity enclose to form the inner cavity.

9. The preforming tool according to claim 5, characterized in that: The preforming mold group includes a two-side cavity preforming mold group, the preforming mold in the two-side cavity preforming mold group is a two-side cavity preforming mold, in the two-side cavity preforming mold, the inside of the protrusion is divided into a core mold avoidance cavity, and two inner cavities, the two inner cavities are connected to the left and right sides of the core mold avoidance cavity, the number of the adjustment plates is two, the adjustment plates and the inner cavities are arranged in a one-to-one correspondence, the adjustment plate is provided with a notch groove with an opening at one end, the notch groove forms a partial structure of the core mold avoidance part, and when the adjustment plate is connected to the preforming plate, the notch groove faces the core mold avoidance cavity.

10. The preforming tool according to claim 9, characterized in that: In the double-sided cavity preforming mold, the preforming plate includes a first plate portion and a second plate portion arranged in the up-down direction, and the first plate portion and the second plate portion are correspondingly provided with a first notch cavity located in the middle, and a second notch cavity located on the left and right sides of the first notch cavity, the corresponding first notch cavity encloses the core mold avoidance cavity, and the corresponding second notch cavity encloses the inner cavity.

11. The preforming tool according to claim 9, characterized in that: The number of the preforming die sets is three, including a middle cavity preforming die set, a two side cavity preforming die set and an outer contour preforming die set, which are arranged in sequence from front to back.

12. The preforming mold according to claim 2, characterized in that: The front side wall of the preformed plate is provided with a plurality of first connecting holes, which are distributed along the circumferential direction; the adjustment plate is correspondingly provided with a plurality of second connecting holes, which are distributed along the circumferential direction; and further comprises a connecting member, which passes through the corresponding first connecting holes and the second connecting holes to fix the preformed plate and the adjustment plate.

13. The preforming tool according to any one of claims 1 to 12, characterized in that: The invention also includes a support frame, which includes an upper fixing part and a lower fixing part. The upper fixing part and the lower fixing part are correspondingly provided with fixing grooves, and the fixing grooves extend in the transverse direction of the support frame. The fixing grooves pass through the transverse end walls of the upper fixing part and the lower fixing part. The preforming mold is installed between the upper fixing part and the lower fixing part, and the upper and lower ends of the preforming plate are inserted into the corresponding fixing grooves.

14. The preforming tool according to claim 13, characterized in that: The preforming mold group includes an intermediate cavity preforming mold group, the preforming mold in the intermediate cavity preforming mold group is an intermediate cavity preforming mold, the preforming mold group includes an external contour preforming mold group, the preforming mold in the external contour preforming mold group is an external contour preforming mold, in the intermediate cavity preforming mold and the external contour preforming mold, the preforming plate includes a first plate portion and a second plate portion arranged in the left-right direction, the first plate portion has a first missing cavity, the second plate portion has a second missing cavity, after the first plate portion and the second plate portion are assembled, the first missing cavity and the second missing cavity enclose the inner cavity, Upper and lower ends of the first plate portion and the second plate portion are capable of sliding along the axial direction of the fixing groove.

15. The preforming tool according to claim 13, characterized in that: The preforming mold group includes a two-side cavity preforming mold group, the preforming mold in the two-side cavity preforming mold group is a two-side cavity preforming mold, in the two-side cavity preforming mold, the preforming plate includes a first plate portion and a second plate portion arranged in the up-down direction, the first plate portion and the second plate portion are correspondingly provided with a first notch cavity located in the middle, and a second notch cavity located on the left and right sides of the first notch cavity, the corresponding first notch cavity encloses the core mold avoidance cavity, and the corresponding second notch cavity encloses the inner cavity, The fixing groove for mounting the two-side cavity preforming mold has a preset depth in the height direction, the upper end of the first plate portion is slidably mounted in the fixing groove at the upper end, and the first plate portion can move relative to the fixing groove in the height direction, and when the first plate portion moves upward to a disengaged position, the first plate portion and the core mold can be staggered in the height direction, The lower end of the second plate portion is slidably mounted in the fixing groove at the lower end, and the second plate portion can move relative to the fixing groove in the height direction. When the second plate portion moves downward to the disengaged position, the second plate portion and the core mold can be staggered in the height direction. It also includes a connecting component, one end of which is connected to the supporting frame, and the other end of which is detachably connected to the first plate portion or the second plate portion.

16. The preforming tool according to claim 13, characterized in that: It also includes one or more fabric adjustment rods, each of which is provided with a cloth seam extending in a vertical direction, and is installed on the support frame. The fabric adjustment rod is located at the front side corresponding to the preforming mold, and the installation position of the fabric adjustment rod is adjustable along the lateral direction of the support frame.

17. The preforming tool according to claim 13, characterized in that: It also includes a core mold fixing part and a magnetic adsorption device. The core mold fixing part is installed on the support frame and is used to fix the core mold. The magnetic adsorption device is installed at the upper rear end of the support frame. The magnetic adsorption device includes a magnetic mechanism. The magnetic mechanism is used to magnetically adsorb the tail of the core mold. The position of the magnetic mechanism is adjustable along the height direction.

18. The preforming tool according to claim 17, characterized in that: The magnetic adsorption device also includes a mounting seat and an adjusting component, the mounting seat has a mounting cavity with an opening at the lower end, the adjusting component is connected to the closed end wall of the mounting cavity, the lower end wall of the adjusting component forms a supporting wall, the supporting wall is located inside the mounting cavity, the height of the supporting wall is adjustable, the upper rear end of the support frame has a supporting beam, the supporting beam is located inside the mounting cavity, the upper side wall of the supporting beam abuts against the supporting wall, the magnetic mechanism is connected to the outer side wall of the mounting seat, and the connection position is adjustable along the height direction.

19. The preforming tool according to claim 18, characterized in that: The closed end wall of the installation cavity is provided with a threaded hole, and the adjustment component includes an adjustment bolt, and the adjustment bolt is screwed into the corresponding threaded hole.

20. The magnetic adsorption device according to claim 18, characterized in that: The number of the magnetic mechanisms is two, and the two magnetic mechanisms are respectively connected to the outer sides of the two side walls of the installation cavity.

21. The magnetic adsorption device according to claim 18, characterized in that: It also includes a transition seat, the magnetic mechanism is fixed to the transition seat, the transition seat is connected to the mounting seat, the connection position of the transition seat is adjustable along the height direction, and the transition seat can also be relatively fixed with the mounting seat when adjusted to a preset height.

22. The magnetic adsorption device according to claim 21, characterized in that: The transition seat includes a first connection part and a second connection part connected at a right angle, the first connection part extends horizontally, the second connection part extends vertically, the magnetic mechanism is fixed to the first connection part, and the second connection part is used to connect with the mounting seat.

23. The magnetic adsorption device according to claim 21, characterized in that: The side wall of the installation cavity is provided with a plurality of third connection hole groups, the plurality of third connection hole groups are distributed in the height direction, each of the third connection hole groups has one or more third connection holes, and the plurality of third connection holes are distributed in the horizontal direction. The second connecting portion is provided with at least one fourth connecting hole and also includes at least one fixing member, and the fixing member passes through the corresponding fourth connecting hole and any of the third connecting holes to fix the second connecting portion and the mounting seat.

24. The magnetic adsorption device according to claim 23, characterized in that: The fixing member includes a fixing bolt and a fixing nut. The fixing bolt passes through the corresponding fourth connecting hole and the third connecting hole. The fixing nut is threadedly fixed to the fixing bolt.

25. The magnetic adsorption device according to claim 21, characterized in that: It also includes at least one connecting member, and the magnetic mechanism and the first connecting part are fixed by the connecting member.

26. The magnetic adsorption device according to claim 25, characterized in that: The first connecting portion is provided with at least one through hole, the magnetic mechanism is correspondingly provided with at least one threaded connection hole, the connecting member comprises a connecting bolt, the connecting bolt passes through the through hole and is screwed and fixed with the corresponding threaded connection hole.

27. The preforming tool according to claim 17, characterized in that: The core mold fixing portion includes a core mold adjustment seat located at the rear end, the core mold adjustment seat has a accommodating hole, the rear end of the core mold is inserted into the accommodating hole, and when the core mold is in a theoretical installation state, there is a preset gap between the inner circumferential wall of the accommodating hole and the corresponding end wall of the core mold.

28. The preforming tool according to any one of claims 1 to 12, characterized in that: It also includes a fabric inlet plate, which is located at the front end of each of the preforming molds. The fabric inlet plate has one or more fabric inlets, and each of the yarn guide ports is arranged in a one-to-one correspondence with one of the fabric inlets.

29. A preforming method, based on the preforming tooling according to any one of claims 1 to 28, characterized in that: In the same preforming mold group, each preforming mold preforms a layer of fabric. When working, the preforming mold at the front end preforms the innermost layer of fabric. After the innermost layer of fabric is preformed, the preforming mold at the adjacent rear end preforms the adjacent outer layer of fabric, and so on, forming from the inner layer to the outer layer in sequence.

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