Machining die for vacuum infusion integrally-formed glass fiber reinforced plastic flange

Abstract

The utility model belongs to the technical field of flange machining, and particularly relates to a machining die for a vacuum infusion integrally-formed glass fiber reinforced plastic flange. The machining mold comprises an upper mold and a lower mold which are buckled and sleeved, a cavity of a glass fiber reinforced plastic flange is formed between the upper mold and the lower mold, the cavity comprises a flange pipe and a flange plate and is used for laying a glass fiber reinforced material in advance, and an inlet hole communicated with the cavity of the flange pipe is formed in the top of the upper mold and connected with a resin container; an air exhaust hole communicated with the flange plate cavity is formed in the bottom of the lower mold and connected with vacuum equipment, and a sealing structure is arranged on the buckling edge of the upper mold and the lower mold; the glass fiber reinforced plastic flange machining mold adopts a vacuum infusion one-time forming process, and the manufactured finished product has the characteristics of regular appearance, consistent strength, convenience in machining and low manufacturing cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of flange processing, and particularly relates to a processing mold for a vacuum infusion integrally formed fiberglass reinforced plastic flange. Background Art

[0002] The fiberglass short tube flange is a variety that is widely used in the current market. When it is processed and manufactured, generally, the short tube and the flange plate are hand-laid into one body through a hand lay-up process and then cured and formed. Specifically, first, the short tube is inserted into a pre-prepared steel flange mold, and then through the hand lay-up molding process, the fiberglass cloth and felt are laid layer by layer in the steel mold, and a layer of resin is applied after laying each layer. This is repeated until the designed thickness is reached. Since the connection between the disc body and the short tube relies on extending the fiber cloth or felt above the short tube, a relatively thick corner is formed at the connection to ensure the connection strength between the flange plate and the short tube. The screw holes on the flange plate are opened by a punching machine or an electric drill after the later curing is completed.

[0003] The above-mentioned process products have the following disadvantages: 1. The manufacturing process is labor-consuming, time-consuming and laborious, and the resin content in the hand lay-up is not easy to control; 2. The short tube and the flange plate are manufactured separately and then hand-laid into one body through a laminate, and a very thick laminate is required to achieve sufficient strength to ensure the pressure-bearing performance. The product shape is irregular, it is difficult to obtain a unified standard, and the manufacturing cost is relatively high. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a processing mold for a fiberglass reinforced plastic flange formed by vacuum infusion in one step, which has the characteristics of regular appearance, consistent strength, convenient processing and low manufacturing cost.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A processing mold for a vacuum infusion integrally formed fiberglass reinforced plastic flange, characterized in that: it includes an upper mold and a lower mold that are buckled and sleeved, and a cavity for the fiberglass reinforced plastic flange is formed between the two. The cavity includes two parts, namely a flange pipe and a flange plate, for pre-laying fiberglass reinforcing materials. An inlet hole communicating with the flange pipe cavity is provided at the top of the upper mold, and the inlet hole is connected to a resin container; an air extraction hole communicating with the flange plate cavity is provided at the bottom of the lower mold, and the air extraction hole is connected to a vacuum device. A sealing structure is provided at the buckling edge of the upper mold and the lower mold.

[0007] The additional technical features constituting the above-mentioned processing mold for a vacuum infusion integrally formed fiberglass reinforced plastic flange further include:

[0008] - A number of struts are arranged along the circumference in the flange area on the inner side of the lower mold. The top of the struts contacts the inner wall of the flange area of the upper mold, and the struts are used to form flange bolt holes.

[0009] - The sealing structure includes an annular groove provided at the buckling edge on the inner side of the lower mold, and a sealing rubber ring is arranged in the annular groove.

[0010] - A positioning mechanism is further arranged at the buckling edge of the upper mold and the lower mold. The positioning mechanism includes an annular convex rib and an annular groove that cooperates with the annular convex rib; or the positioning mechanism includes protrusions arranged along the circumference and blind holes that cooperate with the protrusions.

[0011] - The inlet hole is connected to the resin container through a branch pipe, and a flow meter or a pressure sensor is arranged on the branch pipe; the vacuum device includes a vacuum pump and an adjustment valve; an infrared sensor is arranged in the mold cavity, and the flow meter, the pressure sensor, the vacuum pump, the adjustment valve, and the infrared sensor are all electrically connected to a PLC controller.

[0012] Compared with the prior art, the processing mold for a vacuum infusion integrally formed fiberglass flange provided by the present invention has the following advantages: The upper mold and the lower mold of the mold are sleeved by buckling, and a mold cavity for the fiberglass flange is formed between the two. Reinforcing materials are pre-laid in the mold cavity. An inlet hole communicating with the flange pipe cavity is provided at the top of the upper mold, and the inlet hole is connected to the resin container. An air extraction hole communicating with the flange plate cavity is provided at the bottom of the lower mold, and the air extraction hole is connected to the vacuum device. That is, by using the pressure generated by the vacuum, the resin is pressed into the fiber laminate through the pipeline, so that the resin fully infiltrates the reinforcing material and finally fills the entire mold cavity. After the product is cured, the required product is obtained from the mold. The processing mold has a simple structure, is convenient to operate, the vacuum infusion integrally formed fiberglass flange has uniform texture, firm structural connection, standard and regular appearance, and does not require secondary processing, improves the flange manufacturing efficiency, saves labor, reduces the production cost, and has excellent economic benefits. Description of the Drawings

[0013] Figure 1 It is a schematic structural diagram of a processing mold for a vacuum infusion integrally formed fiberglass flange of the present invention. Detailed Embodiments

[0014] The following further details the structure and working principle of the processing mold for a vacuum infusion integrally formed fiberglass flange provided by the present invention with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0015] In the description of the present utility model, unless otherwise specified, the orientation or positional relationship indicated by terms such as "upper / lower", "top / bottom", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0016] It should be noted that, unless otherwise clearly specified and defined, the terms "installation", "connection", "provided with" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0017] As Figure 1 shown, the processing die structure of the vacuum infusion integrally formed fiberglass flange includes an upper die 1 and a lower die 2 that are snap-fitted and sleeved. A cavity 3 for the fiberglass flange is formed between them. The cavity 3 includes two parts, a flange pipe 31 and a flange plate 32, for pre-laying a glass fiber reinforced material a. An inlet hole 11 communicating with the cavity of the flange pipe 31 is provided at the top of the upper die 1, and the inlet hole 11 is connected to a resin container b; an air extraction hole 21 communicating with the cavity of the flange plate 32 is provided at the bottom of the lower die 2, and the air extraction hole 21 is connected to a vacuum extraction device c. A sealing structure is provided at the snap-fitting edge of the upper die 1 and the lower die 2.

[0018] Its working principle is as follows: The processing die for the fiberglass flange is applicable to the vacuum infusion one-time forming process. Open the cavity 3 of the upper die 1 and the lower die 2 that can be snap-fitted and sleeved. The cavity 3 includes two parts, a flange pipe 31 and a flange plate 32. Lay multiple layers of reinforcing materials a (such as fiberglass cloth, carbon fiber or felt, sandwich materials, etc.) in advance, and according to the requirements of the existing vacuum infusion process, lay a vacuum bag or a flow guiding net and a flow guiding pipe. After ensuring negative pressure in the cavity 3, the resin uniformly impregnates the laminate. After closing the die, an inlet hole 11 communicating with the cavity of the flange pipe 3 is provided at the top of the upper die 1, and an air extraction hole 21 communicating with the cavity of the flange plate 3 is provided at the bottom of the lower die 2. After the air extraction hole 21 is connected to the vacuum device c, through vacuum extraction, a negative pressure condition in the cavity 3 is achieved, and the resin is introduced into the cavity 3 through the inlet hole 11. After internal curing, a finished product is formed.

[0019] This processing die can effectively avoid defects such as pores and looseness in the formed product. The vacuum environment can ensure that when the resin infiltrates the fibers, the air therein is excluded, so that the resin and the fibers are tightly combined, improving the density and performance of the product. In addition, it can also improve the automation level of the flange product, reduce labor costs, and improve production efficiency and product quality.

[0020] It should be noted that the lower mold 2 includes a disk body and a pipe column 12 located in the middle of the disk body, and the upper mold 1 includes a disk body and a cap 22 formed in the middle of the disk body. The annular gap between the pipe column 12 and the cap 22 forms a flange pipe 31, and the circumferential space between the disk body of the lower mold 2 and the disk body of the upper mold 1 is used to form a flange plate 32. Reinforcing material a, such as glass fiber, carbon fiber, etc., is laid in the cavity 3 gap. The selection of the reinforcing material a should be determined according to the performance requirements and use environment of the flange product.

[0021] In the processing mold structure constituting the above-mentioned vacuum infusion integrally formed fiberglass flange,

[0022] - A number of struts 23 are arranged along the circumference in the flange plate area (i.e., the disk body of the lower mold 2) on the inner side of the lower mold 2. The top of the strut 23 contacts the inner wall of the flange plate area (the disk body of the upper mold 1) of the upper mold 1. The strut 23 is used to form flange bolt holes. That is, when laying the reinforcing material a (glass fiber cloth), through holes for the strut 23 to pass through need to be pre-processed in advance, so as to ensure one-time molding without secondary processing of the threaded holes of the flange plate, improving the manufacturing efficiency;

[0023] - Further, the above-mentioned sealing structure includes an annular card slot 41 provided at the buckling edge on the inner side of the lower mold 2 (the disk body of the lower mold 2), and a sealing rubber ring 42 is arranged in the annular card slot 41, which can ensure that after the upper mold 1 and the lower mold 2 are buckled, the edge is tightly sealed, and there will be no problems such as air leakage and liquid leakage during the vacuum pumping process;

[0024] - In order to ensure the structural stability after the upper mold 1 and the lower mold 2 are buckled and ensure smooth vacuum infusion in the cavity 3, a positioning mechanism is also provided at the buckling edge of the upper mold 1 and the lower mold 2. The positioning mechanism includes an annular convex rib and an annular groove cooperating with the annular convex rib. As an equivalent replacement, the positioning mechanism can also be designed as protrusions 51 arranged along the circumference and blind holes 52 cooperating with the protrusions 51, that is, through the socket positioning of the convex rib and the groove or the socket positioning of the protrusions 51 and the blind holes 52, to ensure stable buckling of the mold;

[0025] The protrusions 51 and blind holes 52 (or convex ribs and grooves) of the above-mentioned positioning mechanism are respectively arranged on the inner sides of the upper mold 1 and the lower mold 2, that is, if the protrusions 51 are arranged on the inner side of the lower mold 2, the blind holes 52 are arranged on the inner side of the upper mold 1 corresponding to the protrusions 51, or their positions are interchanged;

[0026] - Preferably, the above-mentioned inlet hole 11 is connected to the resin container b through a branch pipe, and a flow meter or a pressure sensor is arranged on the branch pipe for monitoring data such as resin flow rate and vacuum pressure change; the vacuum device c includes a vacuum pump and a regulating valve; an infrared sensor 6 is arranged in the cavity 3 to obtain its dielectric constant by using the dielectric property of the resin and display information such as ionic viscosity, ionic conductivity, and loss factor; the flow meter, the pressure sensor, the vacuum pump, the regulating valve, and the infrared sensor 6 are all electrically connected to the plc controller e to realize the automatic control of the whole process of vacuum introduction. The electrical connection includes necessary power lines, communication lines, other sensors, and components such as solenoid valve groups.

[0027] The above-mentioned embodiments are only used to illustrate the technical solutions of the present invention and are not the limiting conditions for the implementation of the present invention. Therefore, any other modifications to the technical solutions of the present invention, or equivalent replacements of the configuration dimensions and internal structures, as long as they do not depart from the spirit and scope of the technical solutions of the present invention, shall be covered by the scope of the claims of the present invention.

Claims

1. A processing mold for integrally forming a fiberglass flange by vacuum infusion, characterized in that: It includes an upper mold and a lower mold of a snap-fit set, with a cavity for a fiberglass flange formed between them. The cavity includes two parts, namely a flange pipe and a flange plate, for pre-laying fiberglass reinforced materials. An inlet hole communicating with the flange pipe cavity is provided at the top of the upper mold, and the inlet hole is connected to a resin container; an air extraction hole communicating with the flange plate cavity is provided at the bottom of the lower mold, and the air extraction hole is connected to a vacuum device. A sealing structure is provided at the snap-fit edge of the upper mold and the lower mold.

2. The processing die for a vacuum infusion integrally formed fiberglass flange according to claim 1, wherein: A number of pillars are arranged along the circumference in the flange plate area on the inner side of the lower mold, and the tops of the pillars contact the inner wall of the flange plate area of the upper mold. The pillars are used to form flange bolt holes.

3. The processing mold for a vacuum infusion integrally formed fiberglass reinforced plastic flange according to claim 1, characterized in that: The sealing structure includes an annular groove provided at the snap-fit edge on the inner side of the lower mold, and a sealing rubber ring is arranged in the annular groove.

4. The processing die for a vacuum infusion integrally formed fiberglass flange according to claim 1 or 3, characterized in that: A positioning mechanism is also provided at the snap-fit edge of the upper mold and the lower mold. The positioning mechanism includes an annular convex rib and an annular groove cooperating with the annular convex rib; or the positioning mechanism includes protrusions arranged along the circumference and blind holes cooperating with the protrusions.

5. The processing mold for a vacuum infusion integrally formed fiberglass flange according to claim 1, wherein: The inlet hole is connected to the resin container through a branch pipe, and a flow meter or a pressure sensor is provided on the branch pipe; the vacuum device includes a vacuum pump and a regulating valve; an infrared sensor is arranged in the cavity. The flow meter, the pressure sensor, the vacuum pump, the regulating valve, and the infrared sensor are all electrically connected to a PLC controller.

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