Efficient packaging method for cavity type combination mold

Abstract

The invention discloses an efficient packaging method for a cavity type combination mold, which can achieve the effect of a whole bag by adopting a local packaging mode, reduce the consumption of auxiliary materials for packaging the combination mold, and reduce the manufacturing cost of an air bag and the packaging difficulty of the combination mold. According to the efficient packaging method for the cavity combination die, the sealing groove is machined in the matching face of the combination tool, the sealing ring is placed in the groove, and overall sealing of the cavity forming area of the tool can be achieved after the tool is combined. By means of the efficient packaging method, the problem of the large-size tool in the packaging process can be effectively solved, the manufacturing cost is reduced, the production efficiency is improved, meanwhile, the environment-friendly requirement and reliability are considered, and the efficient packaging method has wide application prospects and popularization value.

Description

Technical Field

[0001] The invention relates to the technical field of combined mold packaging bag making technology, and in particular to a cavity-type combined mold high-efficiency packaging method. Background Art

[0002] Composite vacuum bag forming is a method for manufacturing composite products. It uses a vacuum bag to place the resin-impregnated fiber material in a vacuum environment, uses atmospheric pressure to fully penetrate the fiber material with the resin, and then hardens the resin by room temperature curing or other methods (autoclave or oven) heating and pressurizing to finally form a composite product with high strength and lightweight characteristics. This molding method can be used to manufacture various composite products, such as aerospace components, automotive parts, sports equipment, etc. By controlling parameters such as vacuum degree, temperature and pressure, the performance and quality of the product can be adjusted. Composite vacuum bag forming has the advantages of short molding cycle, stable quality and high part complexity, so it is widely used in industrial production.

[0003] In the manufacturing process of combined mold cavity parts in high-performance fields such as aviation and aerospace, the use of vacuum bag forming technology is a key process. However, this process has a series of challenges such as high packaging difficulty, large demand for auxiliary materials, and strict process requirements, which urgently need to be optimized and improved. In the manufacture of combined mold cavity parts, the whole bag plus air bag method is usually used for packaging and sealing, which is closely related to the complex structure and high precision requirements of the parts. As the size of the tooling increases, the difficulty of packaging increases, which is mainly reflected in the following aspects: Difficult packaging: The complex structure of the combined mold requires higher sealing requirements, and any slight omission may lead to packaging failure.

[0004] A large amount of auxiliary materials is required: In order to ensure the effectiveness of packaging, a large amount of auxiliary materials such as vacuum bags, packaging tapes and air bags are used. These materials are not only costly, but also need to be replaced frequently during the packaging process.

[0005] Leak detection and rework risks: During the vacuum bag forming process, once a leak is detected, rework is usually required. Due to the large size of the tooling, the rework process is often time-consuming and labor-intensive, and the packaging operation needs to be re-performed, which greatly reduces the overall work efficiency.

[0006] These challenges have a significant impact on manufacturing costs and efficiency: Increased manufacturing costs: Frequent use of auxiliary materials directly raises production costs, especially in the case of rework, which not only increases material consumption but also causes an increase in labor costs.

[0007] Reduced work efficiency: The complex packaging process and high-frequency rework requirements prolong the entire production process and reduce efficiency. The extension of the production cycle may lead to delivery delays, which in turn affects the market competitiveness of the product. Summary of the invention

[0008] The purpose of the present invention is to provide a cavity-type combination mold efficient packaging method, which can achieve the effect of whole bagging by adopting partial packaging, reduce the amount of auxiliary materials used in combination mold packaging, reduce the manufacturing cost of airbags and the difficulty of combination mold packaging.

[0009] In order to solve the above technical problems, the present invention provides a cavity type combined mold efficient packaging method, comprising the following steps: Step A: tooling structure design: the tooling includes an upper mold body and a lower mold body, and the upper mold body and the lower mold body are provided with a tooling cavity forming area; a sealing groove is added to the mating surface of the upper mold body and the lower mold body, and the sealing groove is opened around the periphery of the tooling cavity forming area, and the distance is controlled to be 5mm to 20mm; Step B: Parts laying: Before laying, the upper mold body and the lower mold body are cleaned, and the mold release material is applied to the molding area of ​​the tooling cavity; at the same time, fiber material layers are laid and pre-compacted on the separated molding surfaces of the upper mold body and the lower mold body respectively; Step C: Preparation before mold closing: Before mold closing, an air bag is placed in the molding area of ​​the tooling cavity; then a sealing ring is placed in the sealing groove; Step D: Tooling mold closing: first combine the upper mold body and the lower mold body, and then insert the conical pin into the cylindrical pin hole of the lower mold body; then hoist the lower mold body, align the cylindrical pin hole of the upper mold body with the conical pin on the lower mold body for positioning and mold closing, and finally insert bolts into the bolt holes on both sides of the mold body to fix and clamp the upper mold body and the lower mold body; Step E: Packaging: Packaging the end of the tooling opening, placing an isolation film, a breathable felt, a vacuum nozzle and a vacuum bag on the air bag at the tooling opening in sequence, and installing the vacuum nozzle on the vacuum bag; secondly, bonding and fixing the end of the vacuum bag close to the tooling opening to the sealing strip; again using the sealing strip to seal the air bag end with the vacuum bag end close to the air bag end; finally, evacuating the vacuum nozzle and performing vacuum leakage detection.

[0010] Preferably, the sealing groove is provided on the mating surface of the lower mold body and has a rectangular groove cross-section with a groove depth of 2.3 mm to 4.9 mm and a groove width of 4 mm to 7.6 mm.

[0011] Preferably, the sealing ring is a high temperature resistant sealing strip with an O-shaped cross section and a diameter of 3 mm to 6 mm; the sealing ring needs to extend out of the end face of the opening by at least 1 mm at the tooling opening.

[0012] Preferably, in step A, at least one opening is provided on the tooling to facilitate the placement of the air bag during mold closing and the sealing of the air bag during packaging.

[0013] Preferably, in step B, after paving is completed, an isolation film, a breathable felt, and a vacuum bag are placed on the fiber material layer in sequence, and a sealing ring is used to package and seal the tooling, and then vacuum pre-compacted, the pre-compacting time is at least 5 minutes, and the vacuum degree is at least -60kPa.

[0014] Preferably, when the airbag is placed in step C, the end of the airbag extends out of the end surface of the tooling opening by at least 100 mm.

[0015] Preferably, in step D, the mold body mating surface squeezes the sealing ring during the clamping process to achieve sealing between the mold bodies and ensure that the mold clearance of each mold body mating surface is no more than 0.1 mm.

[0016] Preferably, in step E, a sealing strip is used on the tooling to seal a 5mm to 10mm circle along the edge of the tooling opening; when performing vacuum leakage detection, the vacuum is drawn to at least -80Kpa, and after the vacuum is stable, the vacuum is removed, and the vacuum degree does not drop by more than 10Kpa within 5 minutes.

[0017] Compared with the prior art, the cavity-type combined mold high-efficiency packaging method of the present invention processes a sealing groove on the mating surface of the combined tooling and places a sealing ring in the groove, so that the overall sealing of the tooling cavity molding area can be achieved after the tooling is assembled. The main advantages of this technology are: 1. Overall sealing design: Use the upper mold body and the lower mold body to process the sealing groove on the mating surface, and place a reusable sealing ring in the groove to achieve the overall sealing of the molding area of ​​the tooling cavity; avoid using complex packaging materials such as whole bags and air bags, and simplify the packaging process; 2. Cost saving: The sealing ring can be made of low-priced and reusable high-temperature resistant materials such as fluororubber, silicone rubber or silicone foam sponge. They are cheap and durable and can be reused many times, which greatly reduces the use and consumption of auxiliary materials and reduces production costs; 3. Improved packaging efficiency: Packaging only requires a small amount of auxiliary materials such as breathable felt and vacuum bags, which speeds up packaging and improves production efficiency; it also reduces the rework and repackaging problems that may occur during leak detection or transportation; 4. Environmental benefits: reduce disposable packaging materials, reduce waste generation, meet modern environmental protection requirements, and enhance the company's environmental image; 5. Reliable performance: The sealing ring performs stably under high temperature and high pressure conditions, ensuring the reliability of packaging and vacuum effect, further improving product quality and molding accuracy.

[0018] This efficient packaging method can effectively solve the problems of large-size tooling in the packaging process, reduce manufacturing costs, and improve production efficiency, while also taking into account environmental protection requirements and reliability. It has broad application prospects and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a cross-sectional view of the tooling structure provided by the present invention; Figure 2 It is a packaging schematic diagram provided by the present invention; Figure 3 It is a cross-sectional view of the packaging auxiliary material provided by the present invention.

[0020] In the figure: 1. upper mold body; 2. lower mold body; 3. sealing groove; 4. fiber material layer; 5. air bag; 6. sealing ring; 7. bolt hole; 8. cylindrical pin hole; 9. sealing strip; 10. vacuum nozzle; 11. vacuum bag; 12. breathable felt; 13. isolation film. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the drawings are in very simplified form and in non-precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 understood as limiting the present invention.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0024] In addition, the features, operations, and characteristics described in the specification can be combined in any appropriate manner to form various embodiments. Similarly, the steps or actions described in the method can also be adjusted in order in a manner that can be easily seen by those skilled in the art. Therefore, the various sequences in the specification and drawings are only for the purpose of describing a certain embodiment, and are not necessarily such sequences, unless otherwise stated that a certain sequence must be followed. Example

[0025] The present invention provides a cavity type combined mold efficient packaging method, please refer to Figure 1-3 , including the following steps: Step A: tooling structure design: the tooling comprises an upper mold body 1 and a lower mold body 2, and the upper mold body 1 and the lower mold body 2 are provided with a tooling cavity forming area; a sealing groove 3 is additionally provided on the mating surface of the upper mold body 1 and the lower mold body 2, and the sealing groove 3 is opened around the periphery of the tooling cavity forming area, and the distance is controlled to be 5 mm to 20 mm; Step B: Parts laying: Before laying, the upper mold body 1 and the lower mold body 2 are cleaned, and the mold release material is applied to the molding area of ​​the tooling cavity; at the same time, the fiber material layer 4 is laid and pre-compacted on the separated molding surfaces of the upper mold body 1 and the lower mold body 2; Step C: Preparation before mold closing: Before mold closing, place an air bag 5 in the molding area of ​​the tooling cavity; then place a sealing ring 6 in the sealing groove 3; the end of the air bag 5 extends at least 100 mm from the end face of the tooling opening; Step D: Tooling clamping: first combine the upper mold body 1 and the lower mold body 2, and then insert the conical pin into the cylindrical pin hole 8 of the lower mold body 1; then hoist the lower mold body 2, align the cylindrical pin hole of the upper mold body 1 with the conical pin on the lower mold body 2 for positioning and clamping, and finally insert the bolts into the bolt holes 7 on both sides of the mold body to fix and clamp the upper mold body 1 and the lower mold body 2; during the clamping process, the mold body mating surface squeezes the sealing ring 6 to achieve sealing between the mold bodies, and ensure that the clamping clearance of each mold body mating surface is not greater than 0.1 mm; Step E: Packaging: Packaging the end of the tooling opening, placing an isolation film 13, a breathable felt 12, a vacuum nozzle 10 and a vacuum bag 11 on the air bag 5 at the tooling opening in turn, installing the vacuum nozzle 10 on the vacuum bag 11, and using a sealing strip 9 on the tooling to seal along the edge of the tooling opening by 5mm to 10mm; secondly, bonding and fixing the end of the vacuum bag close to the tooling opening to the sealing strip 9; using the sealing strip 9 again to seal the air bag end with the vacuum bag end close to the air bag end; finally, evacuating the vacuum nozzle 10 for vacuum leakage detection, the vacuum is evacuated to at least -80Kpa, and after the vacuum is stable, the vacuum is removed, and the vacuum degree does not drop by more than 10Kpa within 5 minutes.

[0026] In one embodiment, the sealing groove 3 is provided on the mating surface of the lower mold body 2 and has a rectangular groove cross section with a groove depth of 2.3 mm to 4.9 mm and a groove width of 4 mm to 7.6 mm.

[0027] In one embodiment, the sealing ring 6 is a high temperature resistant sealing strip (a low-cost and reusable high temperature resistant material such as fluororubber, silicone rubber or silicone foam sponge can be selected), the cross-section is O-shaped, and the diameter is 3mm to 6mm; at the tooling opening, the sealing ring 6 needs to extend at least 1mm beyond the end face of the opening.

[0028] This efficient packaging method can effectively solve the problems of large-size tooling in the packaging process, reduce manufacturing costs, and improve production efficiency, while also taking into account environmental protection requirements and reliability. It has broad application prospects and promotion value.

[0029] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A cavity type combined mold efficient packaging method, characterized in that: The following steps are involved: Step A: tooling structure design: the tooling comprises an upper mold body (1) and a lower mold body (2), and the upper mold body (1) and the lower mold body (2) are provided with a tooling cavity forming area; a sealing groove (3) is additionally provided on the mating surface of the upper mold body (1) and the lower mold body (2), and the sealing groove (3) is opened around the periphery of the tooling cavity forming area, and the distance is controlled to be 5 mm to 20 mm; Step B: paving parts: before paving, the upper mold body (1) and the lower mold body (2) are cleaned, and a demoulding material is applied to the molding area of ​​the tooling cavity; at the same time, a fiber material layer (4) is paved and pre-compacted on the separated molding surfaces of the upper mold body (1) and the lower mold body (2); Step C: Preparation before mold closing: Before mold closing, an air bag (5) is placed in the molding area of ​​the tooling cavity; then a sealing ring (6) is placed in the sealing groove (3); Step D: Tooling and mold closing: first, the upper mold body (1) and the lower mold body (2) are combined, and then the conical pin is inserted into the cylindrical pin hole (8) of the lower mold body (1); then the lower mold body (2) is hoisted, and the cylindrical pin hole of the upper mold body (1) is aligned with the conical pin on the lower mold body (2) for positioning and mold closing, and finally, bolts are inserted into the bolt holes (7) on both sides of the mold body to fix and clamp the upper mold body (1) and the lower mold body (2); Step E: Packaging: Packaging the end of the tooling opening, placing an isolation film (13), a breathable felt (12), a vacuum nozzle (10) and a vacuum bag (11) on the air bag (5) at the tooling opening in sequence, and installing the vacuum nozzle (10) on the vacuum bag (11); secondly, bonding and fixing the end of the vacuum bag near the tooling opening to the sealing strip (9); again using the sealing strip (9) to seal the end of the air bag with the end of the vacuum bag near the end of the air bag; finally, evacuating the vacuum nozzle (10) and performing a vacuum leak test.

2. A cavity-type combined mold efficient packaging method as claimed in claim 1, characterized in that: The sealing groove (3) is provided on the mating surface of the lower mold body (2) and has a rectangular groove cross-section with a groove depth of 2.3 mm to 4.9 mm and a groove width of 4 mm to 7.6 mm.

3. A cavity-type combined mold efficient packaging method as claimed in claim 2, characterized in that: The sealing ring (6) is a high temperature resistant sealing strip with an O-shaped cross section and a diameter of 3 mm to 6 mm; at the tool opening, the sealing ring (6) needs to extend out of the opening end surface by at least 1 mm.

4. The cavity-type combined mold efficient packaging method according to claim 1, characterized in that: In step A, at least one opening is provided on the tooling to facilitate the placement of the air bag (5) during mold closing and the sealing of the air bag (5) during packaging.

5. The cavity-type combined mold efficient packaging method according to claim 1, characterized in that: In step B, after the paving is completed, an isolation film, a breathable felt, and a vacuum bag are placed on the fiber material layer (4) in sequence, and a sealing ring (6) is used to seal the tooling, and then vacuum pre-compacting is performed. The pre-compacting time is at least 5 minutes, and the vacuum degree is at least -60 kPa.

6. The cavity-type combined mold efficient packaging method according to claim 1, characterized in that: When the air bag (5) is placed in step C, the end of the air bag (5) extends at least 100 mm beyond the end surface of the tooling opening.

7. The cavity-type combined mold efficient packaging method according to claim 1, characterized in that: In step D, during the clamping process, the mold body mating surface squeezes the sealing ring (6) to achieve sealing between the mold bodies and ensure that the mold clearance of each mold body mating surface is no greater than 0.1 mm.

8. The cavity-type combined mold high-efficiency packaging method according to claim 1, characterized in that: In step E, a sealing strip (9) is used on the tooling to form a 5 mm to 10 mm circle seal along the edge of the tooling opening; when performing vacuum leakage detection, the vacuum is drawn to at least -80 KPa, and after the vacuum is stable, the vacuum is removed, and the vacuum degree does not drop by more than 10 KPa within 5 minutes.

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