Demolding device for turbine blade

Abstract

The utility model discloses a demoulding device for a turbine blade. The demoulding device comprises a base and a mould assembly, a group of ejector pins penetrate through the base; the mold assembly comprises a movable mold and a fixed mold, and an inclined driving block is arranged on the movable mold; a mold core is arranged in the middle of the fixed mold, and a mold core groove is formed in the outer edge of the mold core; an ejector groove matched with the ejector pin is formed in the bottom surface of the mold core; in a mold closing state, the inclined driving block is positioned in the mold core groove; the ejector pin and the ejector groove are staggered, and the upper surface of the ejector pin is located below the ejector groove; in a mold opening state, the inclined driving block is separated from the mold core groove; the ejector pins correspond to the ejector grooves in a pair and are located in the ejector grooves, and the injection-molded turbine blade is ejected out to complete demolding. In the mold opening process, the inclined driving block drives the mold core to rotate in the arrangement direction matched with the turbine blade, demolding of the turbine blade is achieved through rotating motion parallel to the parting surface and linear motion perpendicular to the parting surface, it is guaranteed that the bad situation that the edge of the turbine blade deforms and bends in the demolding process is avoided, and the quality of a demolding product is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molds, in particular to a demoulding device for turbine blades. Background Art

[0002] Turbine blades are important components of the turbine section of a gas turbine engine. The high-speed rotating blades are responsible for sucking high-temperature and high-pressure airflow into the burner to keep the engine working. In the prior art, turbine blades are mostly processed through injection molds. However, after production, when the turbine blades need to be removed from the mold, due to the special shape of the turbine blades, conventional demoulding devices such as patent CN215283131U, "an injection mold with self-rotating demoulding of the lower mold" and the patent CN217891739U previously applied by the applicant, "bevel gear demoulding device" disclosed in the structure, use a push rod to support the middle of the product, which easily causes the edge of the turbine blade to deform and bend, thereby causing damage to the turbine blade and making it unusable. To this end, the prior art including the above-mentioned patent sets mutually matching bevel gears on the upper and lower mold cores, and drives the product and the mold to rotate in a direction matching the setting direction of the turbine blades during the demolding process through the bevel gears, and cooperates with the ejector pin to realize product demolding; therefore, this structure needs to be equipped with a driving source for driving the bevel gears to rotate, and because the driving source cannot be set inside the mold, it can only be set on the periphery of the mold, which results in a large overall device size, high cost, and a complex internal mold design structure and high precision requirements.

[0003] Therefore, designing a demoulding device for turbine blades is an important technical problem that technicians in this field need to solve. Utility Model Content

[0004] The purpose of the utility model is to solve the above problems existing in the prior art and to provide a demoulding device for turbine blades.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] A demoulding device for turbine blades comprises a base and a mold assembly arranged above the base; a group of through holes are formed on the base for the ejector to pass through, and the size of the through holes is larger than the outer diameter of the ejector; the mold assembly comprises a movable mold and a fixed mold, and an oblique driving block is arranged on the movable mold; a mold core is centrally arranged in the fixed mold, and a mold core groove matching the oblique driving block is formed on the outer edge of the mold core; an ejector groove matching the ejector is formed on the bottom surface of the mold core; in the mold closing state, the oblique driving block is located in the mold core groove; the ejector is located in the ejector groove; in the semi-open mold state, the movable mold drives the oblique driving block to move upward, and the oblique driving block is partially located in the mold core groove, and drives the mold core and the ejector to rotate relative to the fixed mold; in the open mold state, the oblique driving block is located and separated from the mold core groove; the ejector ejects the injection-molded turbine blade to complete the demoulding.

[0007] Preferably, a fixing seat is provided on the upper surface of the base, and a fixed die pad is provided on the upper surface of the fixing seat; the fixed die pad is located on the lower surface of the mold core, and the two are coaxially arranged, and the mold core rotates relative to the fixed die pad; the ejector pin passes through the fixing seat and the fixed die pad.

[0008] Preferably, the through hole is a waist-shaped hole; the through holes on the fixing seat and the fixed die pad are through holes, and the diameter of the through hole is larger than the outer diameter of the ejector pin, so that the ejector pin can rotate synchronously with the turbine blade during ejection.

[0009] Preferably, the ejector pins are distributed in a circular ring shape, a group of the ejector pins located in the outer circle abut against the bottom of the outer contour of the turbine blade; a group of the ejector pins located in the inner circle abut against the inner contour of the turbine blade; the diameter of the group of through holes located in the outer circle is larger than the diameter of the group of through holes located in the inner circle.

[0010] Preferably, the oblique driving block includes a fixed portion arranged on the movable mold and an inclined portion inserted into the mold core groove, and an acute angle is formed between the two; the inner and outer sides of the inclined portion are curved surfaces, and are equivalent to the inner wall of the mold core groove and the inner surface of the fixed mold.

[0011] Preferably, there is an angle of 79°±1° between the fixed portion and the inclined portion; and the inclined driving block drives the mold core to rotate 8.5°±0.5°.

[0012] Preferably, the width of the mold core groove is greater than the width of the inclined portion, and the notch of the mold core groove is formed with a chamfer inclined toward the outside.

[0013] The advantages of the technical solution of the utility model are mainly reflected in:

[0014] During the opening process of the movable mold and the fixed mold, the oblique driving block on the movable mold drives the mold core in the fixed mold to rotate in the direction of the turbine blade. The turbine blade is demoulded by the rotational motion parallel to the parting surface and the linear motion perpendicular to the parting surface, ensuring that the edge of the turbine blade will not be deformed or bent during the demoulding process, thereby causing damage to the turbine blade and making it unusable, thereby improving the quality of the demoulded product.

[0015] During the demoulding process, the lifting movement of the oblique driving block is converted into the rotational movement of the mold core and the turbine blades that complete the injection molding. There is no need to use a helical gear structure to realize the mold core rotation demoulding. The overall structure is simpler, the volume is small, and the manufacturing cost is low, which is more suitable for wide promotion.

[0016] During the demoulding process, the ejector pin is always in contact with the turbine blade and rotates synchronously with it, ensuring the force stability of the turbine blade during rotation and demoulding, thereby ensuring the demoulding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 : A three-dimensional diagram of the mold closing state of a preferred embodiment of the utility model;

[0018] Figure 2 : Front view of the mold closing state of the preferred embodiment of the utility model;

[0019] Figure 3 : A three-dimensional diagram of the mold opening state of the preferred embodiment of the utility model;

[0020] Figure 4 : Front view of the mold opening state of the preferred embodiment of the utility model;

[0021] Figure 5 : A cross-sectional view of the mold core structure of a preferred embodiment of the utility model;

[0022] Figure 6 : Structural diagram of the oblique drive block of the preferred embodiment of the utility model. DETAILED DESCRIPTION

[0023] The purpose, advantages and features of the present invention will be illustrated and explained through the non-limiting description of the following preferred embodiments. These embodiments are only typical examples of the application of the technical solution of the present invention, and any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection claimed by the present invention.

[0024] In the description of the scheme, it should be noted that the terms "center", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Moreover, in the description of the scheme, with the operator as a reference, the direction close to the operator is the proximal end, and the direction away from the operator is the distal end.

[0025] like Figures 1 to 4 As shown, the utility model discloses a demoulding device for turbine blades, comprising a base 1 and a mold assembly 2 arranged above the base 1. Specifically, a fixing seat is arranged on the upper surface of the base 1, and a fixed mold pad 12 is arranged on the upper surface of the fixing seat; the fixed mold pad 12 is located on the lower surface of the mold assembly 2, and the two are coaxially arranged, and the mold core 221 in the mold assembly 2 can rotate relative to the fixed mold pad 12, and the fixed mold pad 12 can play a role in bearing the mold core 221, and because the surface of the fixed mold pad 12 is a smooth plane, the friction between the two brackets is small.

[0026] like Figure 1 and Figure 3 As shown, a group of through holes 10 for the ejector pin 11 to pass through are formed on the base 1, and the ejector pin 11 passes through the fixed seat and the fixed mold pad 12. Further, the ejector pins 11 are distributed in a circular ring shape, and a group of the ejector pins 11 located in the outer circle abut against the bottom of the outer contour of the turbine blade; and a group of the ejector pins 11 located in the inner circle abut against the inner contour of the turbine blade. The size of the through hole 10 is larger than the outer diameter of the ejector pin 11, and further, the through hole 10 is a waist-shaped hole. The through holes on the fixed seat and the fixed mold pad 12 are all through holes, and the diameter of the through hole is larger than the outer diameter of the ejector pin 11, so that the ejector pin 11 rotates synchronously with the ejector pin 11 during the process of ejecting the turbine blade; wherein the diameter of the through hole group located in the outer circle is larger than the diameter of the through hole group located in the inner circle. The through hole 10 is designed as a waist-shaped hole, and the diameter of the through hole is designed to be larger than the outer diameter of the ejector pin, so that the ejector pin can move in the through hole 10 and the through hole for demolding.

[0027] In addition, since the rotation amplitude of the ejector pin 11 located in the outer ring is greater than that of the ejector pin located in the inner ring, designing the through hole diameter located in the outer ring to be larger than the through hole diameter of the inner ring not only meets the movement requirements but also reduces unnecessary processing waste.

[0028] Combination Figure 3 and Figure 6 As shown, the mold assembly 2 includes a movable mold 21 and a fixed mold 22. The movable mold 21 is provided with an oblique driving block 211; a mold core 221 is centrally provided in the fixed mold 22, and a mold core groove 220 matching the oblique driving block 211 is formed on the outer edge of the mold core 221. The width of the mold core groove 220 is greater than the width of the inclined portion 2112, and the notch of the mold core groove 220 is formed with a chamfer inclined outward. The width of the mold core groove 220 is designed to be greater than the width of the inclined portion 2112 in the oblique driving block 211, so that the mold can be plugged into the mold core groove 220; and the chamfer is used to guide during mold opening and mold closing, so as to facilitate rapid mold opening and closing.

[0029] Further, such as Figure 6 As shown, the oblique driving block 211 includes a fixed portion 2111 disposed on the movable mold 21 and an inclined portion 2112 inserted into the mold core groove 220, and an acute angle of 79°±1° is formed between the two; the oblique driving block 211 moves upward to drive the mold core 221 to rotate until the two are separated, and after separation, the mold core 221 will preferably rotate 8.5°±0.5°; and at this time, the formation of the oblique driving block 211 is preferably 23.5±0.5mm. The inner and outer sides of the inclined portion 2112 are curved surfaces, and are equivalent to the inner wall of the mold core groove 220 and the inner surface of the fixed mold 22. During the mold opening or closing process, the position of the fixed mold 22 is relatively fixed, and the movable mold 21 moves relative to the fixed mold 22. At the same time, the oblique driving block 211 will drive the mold core 221 to rotate when it is lifted and lowered relative to the fixed mold 22, and the mold core 221 stops rotating when the oblique driving block 211 stops moving.

[0030] Combination Figure 4 and Figure 5 As shown, the bottom surface of the mold core 221 is formed with a top groove 222 that matches the ejector pin 11. In the initial state, the movable mold 21 and the fixed mold 22 are in a mold-closed state. At this time, the oblique driving block 211 is located in the mold core groove 220; the ejector pin 11 is located in the top groove 222. In the semi-open mold state, the movable mold 21 drives the oblique driving block 21 to move upward, and the oblique driving block 211 is partially located in the mold core groove 220, and drives the mold core 221 and the ejector pin 11 to rotate relative to the fixed mold 22. In the open mold state, the oblique driving block 211 is located away from the mold core groove 220; the ejector pin 11 ejects the injection-molded turbine blade to complete the demolding.

[0031] There are many implementation methods of the utility model, and all technical solutions formed by equivalent transformation or equivalent transformation fall within the protection scope of the utility model.

Claims

1. A demoulding device for turbine blades, characterized in that: The invention comprises a base (1) and a mold assembly (2) arranged above the base (1); the base (1) is formed with a group of through holes (10) for facilitating the penetration of an ejector pin (11), and the size of the through holes (10) is larger than the outer diameter of the ejector pin (11); the mold assembly (2) comprises a movable mold (21) and a fixed mold (22); the movable mold (21) is provided with an oblique driving block (211); a mold core (221) is centrally arranged in the fixed mold (22); a mold core groove (220) matching the oblique driving block (211) is formed on the outer edge of the mold core (221); a mold core groove (220) matching the ejector pin (211) is formed on the bottom surface of the mold core (221); (11) matches the top groove (222); in the mold closing state, the oblique driving block (211) is located in the mold core groove (220); the ejector pin (11) is located in the top groove (222); in the semi-open mold state, the movable mold (21) drives the oblique driving block (211) to move upward, the oblique driving block (211) is partially located in the mold core groove (220), and drives the mold core (221) and the ejector pin (11) to rotate relative to the fixed mold (22); in the mold opening state, the oblique driving block (211) is located away from the mold core groove (220); the ejector pin (11) ejects the injection-molded turbine blade to complete demoulding.

2. The demoulding device for turbine blades according to claim 1, characterized in that: A fixing seat is arranged on the upper surface of the base (1), and a fixed die pad (12) is arranged on the upper surface of the fixing seat; the fixed die pad (12) is located on the lower surface of the mold core (221), and the two are arranged coaxially, and the mold core (221) rotates relative to the fixed die pad (12); the ejector pin (11) passes through the fixing seat and the fixed die pad (12).

3. The demoulding device for turbine blades according to claim 2, characterized in that: The through hole (10) is a waist-shaped hole; the through holes on the fixing seat and the fixed die pad (12) are through holes, and the diameter of the through hole is larger than the outer diameter of the ejector pin (11), so that the ejector pin (11) can rotate synchronously with the turbine blade during the process of ejecting the turbine blade.

4. The demoulding device for turbine blades according to claim 3, characterized in that: The ejector pins (11) are distributed in a circular ring shape; a group of the ejector pins (11) located in an outer ring abuts against the bottom of the outer contour of the turbine blade; a group of the ejector pins (11) located in an inner ring abuts against the inner contour of the turbine blade; and the diameter of the through holes in the group located in the outer ring is larger than the diameter of the through holes in the group located in the inner ring.

5. The demoulding device for turbine blades according to claim 4, characterized in that: The oblique driving block (211) comprises a fixed portion (2111) arranged on the movable mold (21) and an inclined portion (2112) inserted into the mold core groove (220), and an acute angle is formed between the two; the inner and outer sides of the inclined portion (2112) are curved surfaces, and are equivalent to the inner wall of the mold core groove (220) and the inner surface of the fixed mold (22).

6. The demoulding device for turbine blades according to claim 5, characterized in that: There is an included angle of 79°±1° between the fixed portion (2111) and the inclined portion (2112); and the inclined driving block (211) drives the mold core (221) to rotate 8.5°±0.5°.

7. The demoulding device for turbine blades according to claim 6, characterized in that: The width of the mold core groove (220) is greater than the width of the inclined portion (2112), and the groove opening of the mold core groove (220) is formed with a chamfer that is inclined toward the outside.

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