Combined arc mold and manufacturing method of arc pipe fitting

Abstract

The invention relates to the technical field of arc molds, in particular to a combined arc mold and a manufacturing method of an arc pipe fitting. The combined arc mold comprises a main body core mold, an adjusting assembly and a fixing assembly, the main body core mold comprises at least two split core molds which are positioned and matched with each other, the main body core mold is in an arc shape in the length direction of the main body core mold, the outer portion of the main body core mold is used for laying yarn soaked with resin, at least one split core mold is provided with an ejection piece, and the ejection piece is arranged on the outer portion of the main body core mold. The ejection piece is used for enabling the split core molds to be attached to each other or separated from each other; the adjusting assemblies are arranged on the peripheries of the two ends of the main body core mold in the length direction in a sleeving mode, and the adjusting assemblies are attached to or separated from the main body core mold by adjusting the adjusting assemblies; the fixing assemblies are fixed to the two ends of the main body core mold in the length direction. According to the technical scheme, high dimensional precision of a formed product and convenience in product demolding can be ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of arc molds, and particularly to a combined arc mold and a manufacturing method for arc pipe fittings. Background Art

[0002] Currently, the applications of composite products in fields such as aerospace, automotive, energy, and construction are continuously expanding and deepening, their performance is also constantly improving, and the requirements for the external dimensions of composite products are getting higher and higher. The shape of composite products has evolved from the initial cylindrical shape to a conical shape, and then to more complex arc shapes.

[0003] During the process of manufacturing arc-shaped composite products, traditional sand core molds are usually used to ensure product molding. This type of mold is a disposable mold, and the mold cannot be reused after the product is manufactured. For the production of large quantities of products, it has the characteristics of repeated production and high cost. Therefore, in order to ensure the production of arc-shaped composite products and considering factors such as product production cost and molding process, designing a molding mold with high dimensional accuracy and convenient product demolding has become the key to manufacturing arc-shaped composite products. Summary of the Invention

[0004] The embodiments of the present invention provide a combined arc mold and a manufacturing method for arc pipe fittings, which can ensure high dimensional accuracy of the molded product and convenient product demolding.

[0005] In a first aspect, the embodiments of the present invention provide a combined arc mold, including:

[0006] A main body core mold, including at least two split core molds that are positioned and matched with each other. The main body core mold is arc-shaped in its length direction. The outside of the main body core mold is used for laying yarns impregnated with resin. At least one of the split core molds is provided with an ejector, and the ejector is used to make the split core molds fit or separate from each other;

[0007] An adjusting component, sleeved on the outer periphery of both ends of the main body core mold in the length direction, and making it fit or separate from the main body core mold by adjusting the adjusting component;

[0008] A fixing component, fixed at both ends of the main body core mold in the length direction.

[0009] In a second aspect, the embodiments of the present invention provide a manufacturing method for arc pipe fittings, including:

[0010] Assembling the combined arc mold, where the combined arc mold is the combined arc mold described in the above embodiments;

[0011] Laying the yarns impregnated with resin on the outside of the main body core mold;

[0012] Cure the assembled arc mold after laying is completed;

[0013] Demold the assembled arc mold after curing to obtain a finished arc pipe fitting.

[0014] The present invention has at least the following beneficial effects compared with the related art:

[0015] According to the method for manufacturing an assembled arc mold and an arc pipe fitting provided by an embodiment of the present invention, by providing a main core mold, an adjusting component and a fixing component, wherein the main core mold includes at least two split core molds that are positioned and matched with each other, the assembly accuracy of the main core mold can be ensured, thereby ensuring high dimensional accuracy of the molded product; at the same time, by adjusting the adjusting component to fit or separate from the main core mold, not only can the product be easily demolded, but also the high dimensional accuracy of the molded product can be further ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 Structural schematic diagram of the assembled arc mold provided by an embodiment of the present invention;

[0018] Figure 2 For Figure 1 Half-sectional schematic diagram of the assembled arc mold along its length direction as shown;

[0019] Figure 3 For Figure 2 Partial enlarged schematic diagram of the assembled arc mold as shown;

[0020] Figure 4 For Figure 1 Partial cross-sectional view of the assembled arc mold as shown.

[0021] Reference numerals:

[0022] 1 - Main core mold;

[0023] 11 - Split core mold;

[0024] 111 - Groove;

[0025] 112 - Protrusion;

[0026] 113 - Screw hole;

[0027] 12 - Ejector;

[0028] 2 - Adjusting component;

[0029] 21 - Inner ring;

[0030] 211 - First slit;

[0031] 22 - Outer ring;

[0032] 221 - Second slit;

[0033] 23 - External connecting plate;

[0034] 24 - First screw;

[0035] 3 - Fixing component;

[0036] 31 - End cover;

[0037] 32 - Positioning pin;

[0038] 33 - Second screw. Detailed implementation manners

[0039] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0040] Please refer to Figures 1 to 4 , the embodiments of the present invention provide a combined arc mold, including a main body core mold 1, an adjusting component 2 and a fixing component 3, wherein:

[0041] The main body core mold 1 includes at least two split core molds 11 that are positioned and matched with each other. The main body core mold 1 is arc-shaped in its length direction. The outside of the main body core mold 1 is used for laying yarns impregnated with resin. At least one split core mold 11 is provided with an ejector 12, and the ejector 12 is used to make the split core molds 11 fit or separate from each other;

[0042] The adjusting component 2 is sleeved on the outer peripheries of both ends of the main body core mold 1 in the length direction, and is made to fit or separate from the main body core mold 1 by adjusting the adjusting component 2;

[0043] The fixing component 3 is fixed to both ends of the main body core mold 1 in the length direction.

[0044] In this embodiment, by providing the main body core mold 1, the adjusting component 2 and the fixing component 3, where the main body core mold 1 includes at least two split core molds 11 that are positioned and fitted with each other, the assembly accuracy of the main body core mold 1 can be ensured, thereby ensuring that the formed product has high dimensional accuracy; at the same time, by adjusting the adjusting component 2 to make it fit or separate from the main body core mold 1, not only can the product be easily demolded, but also the dimensional accuracy of the formed product can be further ensured.

[0045] In an embodiment of the present invention, the ejector 12 is a screw, and by screwing the ejector 12, the split core molds 11 can be made to fit or separate from each other.

[0046] In this embodiment, by adopting the screw ejection method, it is convenient to realize the fitting or separation between the split core molds 11. Of course, the ejection method of the ejector 12 can also be any other ejection method, and no specific limitation is made here.

[0047] Take Figure 4 as an example, the main body core mold 1 includes two split core molds 11 that are positioned and fitted with each other. One of the split core molds 11 is provided with a groove 111, and the other split core mold 11 is provided with a protrusion 112. The positioning of the two split core molds 11 is realized through the cooperation of the groove 111 and the protrusion 112, so that the assembly accuracy of the main body core mold 1 can be ensured. Of course, the main body core mold 1 can also include three or more split core molds 11 that are positioned and fitted with each other. It can be understood that when the main body core mold 1 includes two split core molds 11, the ejector 12 is at least 1, and of course it can also be 2. Two ejectors have better positioning accuracy for the main body core mold 1; when the main body core mold 1 includes three or more split core molds 11, one ejector 12 is provided on each split core mold 11, so that the fitting or separation between the split core molds 11 can be realized.

[0048] In an embodiment of the present invention, the adjusting component 2 includes an inner ring 21 and an outer ring 22 sleeved outside the inner ring 21. The outer surface of the inner ring 21 and the inner surface of the outer ring 22 are in contact and both are wedge-shaped. By changing the relative position of the inner ring 21 and the outer ring 22, the size of the inner diameter of the inner ring 21 is changed, so that the inner ring 21 fits or separates from the main body core mold 1.

[0049] In this embodiment, by providing that the outer surface of the inner ring 21 and the inner surface of the outer ring 22 are both wedge-shaped structures, the size of the inner diameter of the inner ring 21 can be changed by changing the relative position of the inner ring 21 and the outer ring 22, so that the inner ring 21 fits or separates from the main body core mold 1.

[0050] In an embodiment of the present invention, the inner ring 21 is provided with a first slit 211 that penetrates through its whole body along its axial direction, and the outer ring 22 is provided with a second slit 221 that penetrates through its whole body along its axial direction.

[0051] In this embodiment, by providing the first slit 211 and the second slit 221, it is convenient to bring the inner ring 21 closer to the outer ring 22 during the assembly of the mold and move the inner ring 21 away from the outer ring 22 during demolding.

[0052] In an embodiment of the present invention, an external connection plate 23 extends from the outer circumference of the inner ring 21. The external connection plate 23 is perpendicular to the axial direction of the outer ring 22. The external connection plate 23 is connected to the outer ring 22 by a first screw 24. By screwing the first screw 24, the relative positions of the inner ring 21 and the outer ring 22 can be changed.

[0053] In this embodiment, by extending the external connection plate 23 from the outer circumference of the inner ring 21 and connecting the external connection plate 23 to the outer ring 22 by the first screw 24, the relative positions of the inner ring 21 and the outer ring 22 can be changed by screwing the first screw 24.

[0054] In an embodiment of the present invention, the fixing assembly 3 includes an end cap 31, a positioning pin 32, and a second screw 33. The end cap 31 is fastened to both ends of the main body core mold 1 in the length direction. Positioning holes and screw holes 113 are provided at both ends of the main body core mold 1 in the length direction. The positioning holes are for inserting the positioning pin 32, and the screw holes 113 are for inserting the second screw 33.

[0055] In this embodiment, by providing the end cap 31, the positioning pin 32, and the second screw 33, not only can the positioning of the end cap 31 and the main body core mold 1 be achieved, but also their firm installation can be realized.

[0056] In addition, an embodiment of the present invention also provides a method for manufacturing an arc-shaped pipe fitting, including:

[0057] Assembling the combined arc-shaped mold, where the combined arc-shaped mold is the combined arc-shaped mold mentioned in the above embodiment;

[0058] Laying the resin-impregnated yarn on the outside of the main body core mold 1;

[0059] Curing the assembled combined arc-shaped mold;

[0060] Demolding the cured combined arc-shaped mold to obtain a finished arc-shaped pipe fitting.

[0061] It can be understood that the method for manufacturing an arc-shaped pipe fitting provided by the embodiment of the present invention and the combined arc-shaped mold provided by the above embodiment are based on the same inventive concept. Therefore, they have the same beneficial effects, and the beneficial effects of the method for manufacturing an arc-shaped pipe fitting will not be elaborated here.

[0062] In an embodiment of the present invention, the combined arc-shaped mold is assembled in the following manner:

[0063] Positioning and assembling all the split core molds 11;

[0064] Assemble the inner ring 21 and the outer ring 22 with the first screw 24, and sleevethe assembled inner ring 21 and outer ring 22 on the outer peripheries of both ends in the length direction of the main body core mold 1. Adjust the first screw 24 to keep the inner ring 21 in a clearance fit state with the main body core mold 1;

[0065] Adjust the ejector 12 to keep the split core molds 11 in a clearance separation state and make the inner ring 21 fit with the main body core mold 1;

[0066] Fasten the end caps 31 on both ends in the length direction of the main body core mold 1, insert the positioning pins 32 into the positioning holes for positioning, and then insert the second screws 33 into the screw holes 113 for fixation.

[0067] In this embodiment, by utilizing the cooperation of the inner ring 21, the outer ring 22 and the first screw 24, the inner ring 21 is kept in a clearance fit state with the main body core mold 1; by adjusting the ejector 12, the split core molds 11 are kept in a clearance separation state and the inner ring 21 is made to fit with the main body core mold 1. In this way, both high positioning accuracy can be ensured and the assembly of the mold can be facilitated.

[0068] In an embodiment of the present invention, the combined arc mold is demolded in the following manner:

[0069] Dismantle the positioning pins 32 and the second screws 33 on the end caps 31 to keep the end caps 31 in a clearance fit state with the main body core mold;

[0070] Adjust the ejector 12 to make the clearance between the split core molds 11 smaller;

[0071] Turn the first screw 24 to reduce the inner diameter of the inner ring 21, so that the split core molds 11 fit with each other and a clearance is generated between the formed product and the main body core mold 1, thereby separating the formed product from the main body core mold 1;

[0072] Turn the first screw 24 in the reverse direction to increase the inner diameter of the inner ring 21, so that the inner ring 21 is separated from the main body core mold 1. At this time, the inner ring 21 is kept in a clearance fit state with the main body core mold 1;

[0073] Remove the end caps 31, the ejector 12, the inner ring 21 and the outer ring 22 from the main body core mold 1, and take out the main body core mold 1 from the formed product.

[0074] In this embodiment, by screwing the first screw 24, the inner diameter of the inner ring 21 is reduced, so that the split core molds 11 are mutually attached and a gap is formed between the molded product and the main core mold 1, thereby separating the molded product from the main core mold 1; then by screwing the first screw 24 in the reverse direction, the inner diameter of the inner ring 21 is increased, so that the inner ring 21 is separated from the main core mold 1. At this time, the inner ring 21 and the main core mold 1 maintain a clearance fit state, so that rapid demolding can be achieved.

[0075] In an embodiment of the present invention, the laying angle of the resin-impregnated yarn is calculated by the following formula:

[0076] θ = arctan(D / (2R))

[0077] In the formula, D is the diameter of the main core mold 1 when the split core molds 11 are mutually attached, and R is the bending radius of the main core mold 1.

[0078] In this embodiment, by setting the laying angle of the resin-impregnated yarn, the finished product quality of the arc-shaped pipe fitting can be ensured.

[0079] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the presence of another identical element in the process, method, article or device including the said element.

[0080] Finally, it should be noted that the above are only preferred embodiments of the present invention, which are only used to illustrate the technical solutions of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are all included in the protection scope of the present invention.

Claims

1. A combined arc mold, characterized in that, Comprising: A main body core mold (1), including at least two split core molds (11) that are positioned and fitted with each other. The main body core mold (1) is arc-shaped in its length direction. The outside of the main body core mold (1) is used for laying yarns impregnated with resin. At least one of the split core molds (11) is provided with an ejector (12), and the ejector (12) is used to make the split core molds (11) fit or separate from each other; An adjusting assembly (2), sleeved on the outer circumferences of both ends in the length direction of the main body core mold (1), and making it fit or separate from the main body core mold (1) by adjusting the adjusting assembly (2); A fixing assembly (3), fixed at both ends in the length direction of the main body core mold (1).

2. The combined arc-shaped mold according to claim 1, wherein, The ejector (12) is a screw, and the split core molds (11) are made to fit or separate from each other by screwing the ejector (12).

3. The combined arc mold according to claim 1, characterized in that, The adjusting assembly (2) includes an inner ring (21) and an outer ring (22) sleeved outside the inner ring (21). The outer surface of the inner ring (21) and the inner surface of the outer ring (22) are in contact and both are wedge-shaped. By changing the relative positions of the inner ring (21) and the outer ring (22), the size of the inner diameter of the inner ring (21) is changed to make the inner ring (21) fit or separate from the main body core mold (1).

4. The combined arc-shaped mold according to claim 3, wherein, The inner ring (21) is provided with a first slit (211) running through its whole body along its axial direction, and the outer ring (22) is provided with a second slit (221) running through its whole body along its axial direction.

5. The combined arc-shaped mold according to claim 4, wherein An external connection plate (23) also extends from the outer circle of the inner ring (21). The external connection plate (23) is perpendicular to the axial direction of the outer ring (22), and the external connection plate (23) is connected to the outer ring (22) by a first screw (24). By screwing the first screw (24), the relative positions of the inner ring (21) and the outer ring (22) are changed.

6. The combined arc-shaped mold according to claim 5, wherein The fixing assembly (3) includes an end cap (31), a positioning pin (32), and a second screw (33). The end cap (31) is buckled on both ends in the length direction of the main body core mold (1). Positioning holes and screw holes (113) are provided at both ends in the length direction of the main body core mold (1). The positioning holes are used for inserting the positioning pin (32), and the screw holes (113) are used for inserting the second screw (33).

7. A manufacturing method of an arc-shaped pipe fitting, characterized in that, Comprising: An assembled combined arc mold, and the combined arc mold is the combined arc mold as described in claim 6; Laying the yarns impregnated with resin on the outside of the main body core mold (1); Curing the combined arc mold after laying is completed; Demolding the cured combined arc mold to obtain a finished arc-shaped pipe fitting.

8. The manufacturing method of the arc-shaped pipe fitting according to claim 7, characterized in that, The combined arc mold is assembled in the following manner: Positioning and assembling all the split core molds (11); Assemble the inner ring (21) and the outer ring (22) with the first screw (24), and sleuth the assembled inner ring (21) and outer ring (22) on the outer peripheries at both ends in the length direction of the main body core mold (1). Adjust the first screw (24) to keep the inner ring (21) in a clearance fit state with the main body core mold (1); Adjust the ejector member (12) to keep the split core molds (11) in a clearance separation state and make the inner ring (21) fit with the main body core mold (1); Fasten the end caps (31) to both ends in the length direction of the main body core mold (1), insert the positioning pins (32) into the positioning holes for positioning, and then insert the second screws (33) into the screw holes (113) for fixation.

9. The manufacturing method of the arc-shaped pipe fitting according to claim 7, characterized in that, The combined arc mold is demolded in the following manner: Remove the positioning pins (32) and the second screws (33) on the end caps (31) to keep the end caps (31) in a clearance fit state with the main body core mold; Adjust the ejector member (12) to reduce the clearance between the split core molds (11); Screw the first screw (24) to reduce the inner diameter of the inner ring (21), so that the split core molds (11) fit together and a clearance is generated between the formed product and the main body core mold (1), thereby separating the formed product from the main body core mold (1); Unscrew the first screw (24) in the reverse direction to increase the inner diameter of the inner ring (21), so that the inner ring (21) is separated from the main body core mold (1). At this time, the inner ring (21) is in a clearance fit state with the main body core mold (1); Remove the end caps (31), the ejector member (12), the inner ring (21) and the outer ring (22) from the main body core mold (1), and remove the main body core mold (1) from the formed product.

10. The manufacturing method of the arc-shaped pipe fitting according to any one of claims 7-9, characterized in that, The laying angle of the resin-impregnated yarn is calculated by the following formula: θ = arctan(D / (2R)) In the formula, D is the diameter of the main body core mold (1) when the split core molds (11) fit together, and R is the bending radius of the main body core mold (1).

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