Segmented ejection mechanism of HP-RTM mold

Abstract

The utility model provides a segmented ejection mechanism of an HP-RTM mold in the technical field of HP-RTM molds, and the segmented ejection mechanism comprises an HP-RTM lower mold, a plurality of ejection holes are formed in the HP-RTM lower mold from bottom to top in a penetrating manner, the ejection holes are distributed in the middle and the side edge of the HP-RTM lower mold, and the ejection holes in the side edge incline outwards by a certain angle; the HP-RTM upper die is arranged at the top end of the HP-RTM lower die, and the shape of the HP-RTM upper die is matched with that of the HP-RTM lower die; each ejection mechanism is provided with an ejection rod and an air cylinder, the power output end of each air cylinder is connected with the corresponding ejection rod, two circles of sealing ring grooves are formed in the front end of each ejection rod, the outer diameter of each ejection rod is matched with the inner diameter of the corresponding ejection hole, and each ejection rod extends into the corresponding ejection hole; and the sealing rings are respectively arranged on the sealing ring grooves in a sleeving manner. The HP-RTM mold has the advantage that the demolding quality of the HP-RTM mold is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of HP-RTM molds, in particular to a segmented ejection mechanism for an HP-RTM mold. Background Technique

[0002] HP-RTM is the abbreviation of High Pressure Resin Transfer Molding in English. Its full name is the high-pressure resin transfer molding process, simply referred to as the HP-RTM molding process. It means using high-pressure to flush and mix resins and injecting them into a vacuum-sealed mold pre-laid with fiber-reinforced materials and pre-placed inserts. Through resin flow filling, impregnation, curing, and demolding, a composite product is obtained.

[0003] In the HP-RTM molding process, how to demold and take out the parts becomes a difficult point. Existing HP-RTM molds usually adopt a single ejection mechanism, and the ejection area is required to be arranged on the top surface or the sealing flange surface of the product. If it is arranged on the top surface of the product, when encountering a product with a deep cavity structure, there is a state of vacuum adsorption between the vertical surface and the mold, and forced ejection is likely to cause the product to crack, affecting the qualified rate and appearance of the product. If it is arranged on the sealing flange surface, since the ejector rod structure is a movable part and cannot be completely flush with the sealing flange surface, it will cause the sealing flange surface to be uneven, affecting the sealing performance of the product. On the other hand, for products that are difficult to demold and have a deep cavity structure, due to the high sealing requirements of HP-RTM molds, the side core-pulling structure is not applicable.

[0004] Therefore, how to provide a segmented ejection mechanism for an HP-RTM mold to improve the demolding quality of the HP-RTM mold has become an urgent technical problem to be solved. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide a segmented ejection mechanism for an HP-RTM mold to improve the demolding quality of the HP-RTM mold.

[0006] The utility model is realized as follows: A segmented ejection mechanism for an HP-RTM mold includes:

[0007] An HP-RTM lower mold is provided with a plurality of ejection holes penetrating from bottom to top. Each of the ejection holes is distributed in the middle and the side of the HP-RTM lower mold, and each of the ejection holes on the side is inclined outward at a certain angle;

[0008] An HP-RTM upper mold is arranged at the top end of the HP-RTM lower mold, and its shape matches that of the HP-RTM lower mold;

[0009] Several ejection mechanisms are respectively provided with an ejector rod and a cylinder, the power output end of the cylinder is connected to the ejector rod, the front end of the ejector rod is provided with two circles of sealing ring grooves, the outer diameter of the ejector rod matches the inner diameter of the ejection hole, and extends into the ejection hole;

[0010] A plurality of sealing rings are respectively sleeved on the sealing ring grooves.

[0011] Furthermore, the sealing ring is an O-ring.

[0012] The advantages of the utility model are:

[0013] A plurality of ejection holes are arranged on the HP-RTM lower mold, and the ejection holes are distributed in the middle and the side of the HP-RTM lower mold. The side ejection holes are inclined outward at a certain angle. A plurality of ejection mechanisms are arranged, and the ejector rods of the ejection mechanisms are respectively extended into a top hole. The finished products arranged between the HP-RTM lower mold and the HP-RTM upper mold are ejected from the top surface and the side through the ejection mechanisms. The finished products with deep cavity structures can be vacuum-broken to avoid cracking of the finished products. The ejection mechanism can also be arranged on the sealing flange surface to avoid uneven sealing flange surface affecting the sealing performance. The side core pulling structure is replaced to realize automatic demolding of the finished products that are difficult to demold, and finally the demolding quality of the HP-RTM mold is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below in conjunction with the embodiments with reference to the accompanying drawings.

[0015] Figure 1 It is one of the structural schematic diagrams of a segmented ejection mechanism of a HP-RTM mold of the utility model.

[0016] Figure 2 This is the second structural schematic diagram of a segmented ejection mechanism of a HP-RTM mold of the utility model.

[0017] Marking Description:

[0018] 100-a segmented ejection mechanism of an HP-RTM mold, 1-HP-RTM lower mold, 2-HP-RTM upper mold, 3-ejection mechanism, 4-sealing ring, 5-finished product, 11-ejection hole, 31-ejector rod, 32-cylinder, 311-sealing ring groove, 51-demouldable portion, 52-undercut portion, 53-ejection extension portion. DETAILED DESCRIPTION

[0019] In an embodiment of the present utility model, by providing a segmented ejection mechanism 100 for an HP-RTM mold, the problems in the prior art that a single ejection mechanism is used in the HP-RTM mold, which easily causes product cracking and uneven sealing flange surfaces, and that the side core-pulling structure is not applicable to products with difficult demolding and deep cavity structures are solved, and the technical effect of greatly improving the demolding quality of the HP-RTM mold is achieved.

[0020] The technical solution in the embodiment of the present utility model for solving the above problems has the following general idea: by arranging a plurality of ejection mechanisms 3 to eject the top surface and side surfaces of the finished product 5, the vacuum of the finished product 5 with a deep cavity structure can be broken, avoiding cracking of the finished product 5 and also avoiding the ejection mechanism 3 being arranged on the sealing flange surface, which causes unevenness of the sealing flange surface and affects the sealing performance. Moreover, it replaces the side core-pulling structure to realize the automatic demolding of the finished product with difficult demolding, so as to improve the demolding quality of the HP-RTM mold.

[0021] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the specification drawings and specific implementation manners.

[0022] Please refer to Figures 1 to 2 As shown, a preferred embodiment of a segmented ejection mechanism 100 for an HP-RTM mold of the present utility model includes:

[0023] An HP-RTM lower mold 1 is provided with a plurality of ejection holes 11 penetrating from bottom to top. Each of the ejection holes 11 is distributed in the middle and on the side of the HP-RTM lower mold 1, and each of the ejection holes 11 on the side inclines outward at a certain angle.

[0024] An HP-RTM upper mold 2 is arranged at the top end of the HP-RTM lower mold 1, and its shape matches that of the HP-RTM lower mold 1.

[0025] A plurality of ejection mechanisms 3 are respectively provided with a ejector rod 31 and a cylinder 32. The power output end of the cylinder 32 is connected to the ejector rod 31. Two circles of sealing ring grooves 311 are provided at the front end of the ejector rod 31. The outer diameter of the ejector rod 31 matches the inner diameter of the ejection hole 11 and extends into the ejection hole 11. The ejection mechanism 3 is used to eject the finished product 5 arranged between the HP-RTM lower mold 1 and the HP-RTM upper mold 2, that is, for demolding.

[0026] A plurality of circles of sealing rings 4 are respectively sleeved on one of the sealing ring grooves 311 to ensure the sealing performance of the ejection hole 11.

[0027] The sealing ring 4 is an O-ring.

[0028] The working principle of the present utility model:

[0029] After the finished product 5 including the demolding part 51, the undercut part 52 and the ejection extension part 53 is formed, the HP-RTM upper mold 2 is opened, and the ejection mechanisms 3 on the left and right sides act simultaneously to eject at the extension part 53. After the ejection reaches the set ejection distance, the action stops. At the same time, the undercut part 52 of the finished product 5 is completely separated from the HP-RTM lower mold 1, and at the same time, the vacuum adsorption between the finished product 5 and the side surface of the HP-RTM lower mold 1 is also broken. After the above actions are completed, the ejection mechanism 3 in the middle ejects to break the vacuum adsorption between the finished product 5 and the top surface of the HP-RTM lower mold 1, and then the finished product 5 is taken out.

[0030] In summary, the advantages of the present utility model are as follows:

[0031] By arranging a plurality of ejection holes on the HP-RTM lower mold, each ejection hole is distributed in the middle and the side of the HP-RTM lower mold, and each ejection hole on the side is inclined outward at a certain angle. A plurality of ejection mechanisms are arranged, and the ejector rods of each ejection mechanism respectively extend into an ejection hole. The finished product arranged between the HP-RTM lower mold and the HP-RTM upper mold is ejected from the top surface and the side surface by each ejection mechanism, which can break the vacuum of the finished product with a deep cavity structure, avoid cracking of the finished product, and also avoid the ejection mechanism being arranged on the sealing flange surface, which causes the sealing flange surface to be uneven and affects the sealing performance. Moreover, it replaces the side core-pulling structure and realizes the automatic demolding of the finished product that is difficult to demold, ultimately greatly improving the demolding quality of the HP-RTM mold.

[0032] Although the specific embodiments of the present utility model have been described above, those skilled in the art should understand that the specific embodiments we described are illustrative rather than used to limit the scope of the present utility model. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present utility model should be covered by the scope protected by the claims of the present utility model.

Claims

1. A segmented ejection mechanism for an HP-RTM mold, characterized in that: Including: An HP-RTM lower mold, which is provided with a plurality of top holes penetrating from bottom to top. Each of the top holes is distributed in the middle and the side of the HP-RTM lower mold, and each of the top holes on the side is inclined outward at a certain angle; An HP-RTM upper mold, which is arranged at the top end of the HP-RTM lower mold and has a shape matching that of the HP-RTM lower mold; A plurality of ejecting mechanisms, each of which is provided with a ejector rod and a cylinder. The power output end of the cylinder is connected to the ejector rod. The front end of the ejector rod is provided with two circles of sealing ring grooves. The outer diameter of the ejector rod matches the inner diameter of the top hole and extends into the top hole; A plurality of circles of sealing rings, which are respectively sleeved on one of the sealing ring grooves.

2. The segmented ejection mechanism of an HP-RTM mold according to claim 1, wherein: The sealing ring is an O-ring.

Images