A rotary core-pulling mold for manufacturing turbines

Abstract

A rotary core-pulling mold for manufacturing a turbine comprises an upper mold plate and a lower mold plate, wherein a slide seat is provided in the lower mold plate, a first slider and an inclined guide column are provided on the slide seat, the inclined guide column passes through the first slider and is connected to the upper mold plate, the first slider is provided with a first mold core for forming turbine blades; a second slider abutting against the first slider is provided in the slide seat, the second slider is provided with a second mold core for forming turbine blades, a turntable is provided in the lower mold plate, the turntable is connected to the slide seat, and the turntable is connected to a driving mechanism; a mold core seat is provided in the lower mold plate, the mold core seat extends to form a third mold core of the inner hole of the turbine, and the first mold core, the second mold core and the third mold core form a cavity. The first slider and the inclined guide column are used to perform the first core-pulling of the upper half of the turbine blade, and the turntable is used to simultaneously drive the first slider and the second slider to move outward along the arc track direction of the turbine blade, thereby ensuring the complete separation of the mold core from the product and realizing the smooth demolding of the product.

Description

Technical Field

[0001] The invention relates to the field of moulds, in particular to a rotary core-pulling mould for manufacturing turbines. Background Art

[0002] A turbine is a fan in a car or airplane engine that uses exhaust gas to blow fuel vapor into the engine to improve engine performance. A turbine is a rotary power machine that converts the energy of a flowing medium into mechanical work. It is one of the main components of aircraft engines, gas turbines, and steam turbines.

[0003] Existing turbines are mainly manufactured through injection molds, and since turbines are mainly composed of blades, and most general blades have a barb structure, most of them are set in the form of sliders and core-pulling design to prevent the product from interfering with the mold core and damaging the product when the mold is opened. In addition, the blades generally have an inclined angle, so most of them are divided into two mold cores for core pulling to prevent interference with the blades when the single mold core is pulled out and damage the product. For example, a turbine mold with application number "201920997796.0" is realized through the structure of the first slider and the second slider, mainly by setting two mold cores forming the blades at the ends of the first slider and the second slider and realizing core pulling by sliding the first slider and the second slider horizontally.

[0004] However, the above-mentioned turbines basically have fewer blades, and the inclination angle of the above-mentioned turbine blades is also smaller, and the trajectory of the turbine blades is also relatively simple. When the number of turbine blades increases, the inclination angle increases, and the turbine has multiple trajectory directions, when the existing mold uses the above-mentioned first slider and the second slider for flat-pulling core pulling, it may still cause interference between the mold core and the product and damage the product. Summary of the invention

[0005] In order to overcome the above-mentioned deficiencies in the prior art, the present invention provides a rotary core-pulling mold for manufacturing a turbine.

[0006] The technical solution to the technical problem of the present invention is: a rotary core-pulling mold for manufacturing a turbine, comprising an upper mold plate and a lower mold plate, wherein the lower mold plate is provided with a plurality of slide seats distributed circumferentially, the slide seat is provided with a first slide block and an inclined guide column, the inclined guide column passes through the first slide block and is connected to the upper mold plate, and the front end of the first slide block is provided with a first mold core for forming the upper half structure of the turbine blade;

[0007] The slide seat is further provided with a second slide block abutting against the first slide block, and the front end of the second slide block is provided with a second mold core forming the lower half structure of the turbine blade. The lower mold plate is further provided with a turntable, which is transmission-connected with the slide seat, and the turntable is connected with a driving mechanism, and the driving mechanism drives the turntable to rotate, so that the turntable drives the first and second slide blocks in the slide seat to be pulled out outward along the arc track direction of the turbine blade;

[0008] A mold core seat is also provided in the lower mold plate, and a third mold core is extended upward from the mold core seat for forming the inner hole of the turbine. The first mold core, the second mold core and the third mold core form a cavity for producing the turbine.

[0009] Preferably, a track groove is provided on the turntable, and a transmission rod is provided at the lower end of the slide seat. When the turntable rotates, the transmission rod moves along the track groove, and the movement trajectory of the transmission rod is consistent with the arc trajectory of the turbine blade.

[0010] Preferably, the rotary core-pulling mold also includes a base plate located below the lower mold plate, and the driving mechanism includes a telescopic rod and a rotating gear arranged on the base plate, the rotating gear is respectively connected to the telescopic rod and the turntable gear, and the telescopic rod is connected to an oil cylinder.

[0011] Preferably, a locking cavity is provided in the lower mold, and a first locking block is provided in the locking cavity to prevent the first slider from moving and affecting injection molding when the mold is closed. The first locking block is opposite to the first slider and is connected to the upper mold. The locking cavity is also provided with a second locking block to prevent the first slider from driving the second slider when the mold is opened. The second locking block is opposite to the second slider and is connected to the upper mold.

[0012] Preferably, the first locking block is provided with a first locking inclined surface, and the rear end of the first sliding block is provided with a second locking inclined surface;

[0013] When the mold is closed, the first locking inclined surface cooperates with the second locking inclined surface to lock the movement of the first slider;

[0014] When the mold is opened, the upper mold plate drives the inclined guide column and the first locking block to move upward at the same time, and the first locking inclined surface faces upward, so that the first slider slides outward through the inclined guide column to achieve the first core pulling.

[0015] Preferably, the second locking block is provided with a first locking plane and a third locking inclined plane connected to the first locking plane, and the rear end of the second sliding block is provided with a second locking plane;

[0016] When the mold is opened, the first locking plane abuts against the second locking plane to lock the movement of the second slider;

[0017] After the mold is opened, the driving mechanism drives the turntable to rotate, and at the same time the third locking slope faces the second locking plane to release the lock on the second slider, so that the turntable drives the first slider and the second slider in the slide seat to be pulled outward along the arc trajectory direction of the turbine blade to achieve the second core pulling.

[0018] Preferably, the first sliding block is provided with a directional protrusion, the second sliding block is provided with a directional groove, and the directional protrusion is slidably arranged in the directional groove.

[0019] Preferably, a rotating bearing is provided between the turntable and the mold base.

[0020] Preferably, a hot flow nozzle is provided in the upper mold plate, the hot flow nozzle is close to the mold cavity, the hot flow nozzle is connected to a feed plate, and the feed plate is connected to an external material injection device.

[0021] Preferably, the turbine is made of polyetheretherketone material, and the temperature of the mold is maintained above 200 degrees Celsius during operation.

[0022] The beneficial effect of the present invention is that the first core pulling of the upper part of the turbine blade is guaranteed by the design of the first slider and the inclined guide column, and at the same time, the second rotary core pulling is realized by driving the first slider and the second slider outward along the arc trajectory direction of the turbine blade through the form of a turntable, thereby ensuring the complete separation of the mold core and the product, so as to realize the smooth demolding of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of the turbine of the present invention.

[0024] Figure 2 It is a front view of the mold of the present invention.

[0025] Figure 3 It is an isometric view of the mold of the present invention when the mold is opened.

[0026] Figure 4 The present invention Figure 3 A enlarged view of .

[0027] Figure 5 It is a diagram of the internal structure of the mold of the present invention.

[0028] Figure 6 The present invention Figure 5 B is an enlarged view of .

[0029] Figure 7It is an internal structure diagram of the mold of the present invention from another perspective.

[0030] Figure 8 The present invention Figure 7 C enlarged view.

[0031] Fig. 9 It is a structural diagram of a turntable of the present invention.

[0032] Fig.10 It is a front view of the internal structure of the mold of the present invention.

[0033] Fig.11 The present invention Fig.10 DD sectional view (internal sectional view when mold is closed).

[0034] Fig.12 This is a state diagram of the first slider and the second slider after the first slider of the present invention completes the first core pulling.

[0035] Fig.13 This is a state diagram of the first slider and the second slider of the present invention when they are ready to start the second core pulling.

[0036] Fig.14 It is a state diagram of the first slider and the second slider of the present invention when completing the second core pulling.

[0037] Fig.15 It is a top view of the main internal structure of the present invention after core pulling is completed.

[0038] Fig.16 It is a bottom view of the main internal structure of the present invention after core pulling is completed.

[0039] Fig.17 The present invention Fig.16 Enlarged view of E.

[0040] Fig.18 It is an isometric view of the internal structure of the mold of the present invention. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0042] Reference Figures 1 to 18When designing this rotary core-pulling mold, it was considered that this patent involves a large number of turbine blades with a large inclination angle, and has blade trajectories in two different directions separated from the center. Therefore, it is necessary to design the first mold core 7 that first pulls out the upper part structure 6 of the turbine blade (the first mold core 7 is at the upper end, i.e., the outside, with a better inclination angle, and the linear core pulling will not interfere with the product and damage the product), and then pull out the second mold core 10 of the lower part structure 9 of the turbine blade. Since the lower part structure 9 of the turbine blade is on the inside and has a large inclination angle, a rotary core-pulling structure is conceived. See the subsequent description for details.

[0043] A rotary core-pulling mold for manufacturing a turbine comprises an upper mold plate 1 (the upper mold plate 1 is a movable mold plate for opening the mold) and a lower mold plate 2 (the lower mold plate is a fixed mold plate, and the interior is a main mold core structure for forming a product cavity). The lower mold plate 2 is provided with a plurality of circumferentially distributed slide seats 3, and the slide seats 3 are provided with a first slider 4 and an inclined guide column 5. The inclined guide column 5 passes through the first slider 4 and is connected to the upper mold plate 1, so that when the mold is opened, the upper mold plate 1 will drive the inclined guide column 5 to move upward, so that the first slider 4 slides backward (until the inclined guide column 5 completely slides out of the first slider 4, that is, the rear end of the first slider 4 is flush with the rear end of the subsequent second slider 8). Since the front end of the first slider 4 is provided with a first mold core 7 for forming an upper half structure 6 of a turbine blade, the core pulling of the upper half structure 6 of the turbine blade can be achieved by sliding the first slider 4 backward.

[0044] The slide 3 is also provided with a second slide block 8 which abuts against the first slide block 4. The front end of the second slide block 8 is provided with a second mold core 10 which forms the lower half structure 9 of the turbine blade. The lower mold plate 2 is also provided with a turntable 11, which is transmission-connected to the slide 3. The turntable 11 is connected with a driving mechanism 12. After the mold is opened, the driving mechanism 12 drives the turntable 11 to rotate, so that the turntable 11 drives the first slide block 4 and the second slide block 8 in the slide 3 to be pulled outward along the arc-shaped trajectory direction of the turbine blade, so as to realize the separation of the second mold core 10 from the turbine blade, i.e., the second core pulling. Therefore, after two core pullings, the mold core and the product can be completely separated, thereby ensuring that the product is smoothly demolded.

[0045] A mold core seat 13 is also provided in the lower mold plate 2. The mold core seat 13 extends upward to have a third mold core 14 for forming the inner hole of the turbine. The first mold core 7, the second mold core 10 and the third mold core 14 form a cavity for producing the turbine.

[0046] The specific transmission structure of the turntable 11 and the slide 3 is as follows: a track groove 15 is provided on the turntable 11, and a transmission rod 16 is provided at the lower end of the slide 3. When the turntable 11 rotates, the transmission rod 16 moves along the track groove 15 at the same time, so that the movement trajectory of the transmission rod 16 is consistent with the arc trajectory of the turbine blade, so as to realize rotary core pulling, and because the movement trajectory is consistent with the arc trajectory of the turbine blade, it will not contact the product at all during separation, and there is no need to worry about interference with the product during core pulling and affecting the product quality.

[0047] In this embodiment, the rotary core-pulling mold further includes a base plate 17 located below the lower mold plate 2, and the driving mechanism 12 includes a telescopic rod 18 and a rotating gear 19 disposed on the base plate 17, and the rotating gear 19 is respectively connected to the telescopic rod 18 and the turntable 11 through gear transmission, and the telescopic rod 18 is connected to an oil cylinder 20. When the driving mechanism 12 is in operation, the telescopic rod 18 is driven to move through the oil cylinder 20, and the telescopic rod 18 indirectly drives the turntable 11 to rotate through the rotating gear 19, causing the turntable 11 to rotate and drive the transmission rod 16 to perform a second rotary core-pulling operation, thereby ensuring that the second mold core 10 and the turbine blade are separated by the rotation of the turntable 11.

[0048] In this embodiment, considering that the first mold core 7, i.e., the first slider 4, must be in a stationary state during mold closing and injection molding (the second slider 8 is limited by the first slider 4 when it does not slide, so it will not slide either, and thus the sliding problem of the second slider 8 is not considered during mold closing), a locking cavity 21 is provided in the lower mold plate 2, and a first locking block 22 is provided in the locking cavity 21. The first locking block 22 is opposite to the first slider 4 and is connected to the upper mold plate 1, so that the first locking block 22 and the first slider 4 are abutted against each other to form a limit when the mold is closed, thereby ensuring the stable limit of the first slider 4, i.e., the first mold core 7.

[0049] The specific limiting structure of the first locking block 22 is as follows: a first locking inclined surface 24 is provided on the first locking block 22, and a second locking inclined surface 25 is provided at the rear end of the first sliding block 4;

[0050] Therefore, when the mold is closed, the first locking slope 24 cooperates with the second locking slope 25 to lock the movement of the first slider 4. At this time, the first slider 4 is locked so that the first mold core 7 is in a stable limited state, thereby ensuring the quality of product injection molding;

[0051] When the mold is opened, since the first slider 4 is required to perform the first core pulling, the upper mold plate 1 drives the inclined guide column 5 and the first locking block 22 to move upward at the same time, and the first locking bevel 24 is upward. At this time, the second locking bevel 25 on the first slider 4 is unlocked from the first locking bevel 24, so that the first slider 4 can slide outward through the inclined guide column 5.

[0052] Since the first slider 4 slides outward through the inclined guide column 5 during the first core pulling, it is very likely to drive the second slider 8 to slide, so that the second slider 8 also performs a certain linear core pulling, causing the second slider 8 to interfere with the product and damage the product. Therefore, a second locking block 23 is also provided in the locking cavity 21. The second locking block 23 is opposite to the second slider 8 and is connected to the upper template 1, so that the second locking block 23 is locked with the second slider 8, so that when the first slider 4 slides for the first core pulling, the second slider 8 is in a locked state.

[0053] The specific locking structure of the second locking block 23 and the second slider 8 is as follows: the second locking block 23 is provided with a first locking plane 26 and a third locking inclined plane 27 connected to the first locking plane 26, and the rear end of the second slider 8 is provided with a second locking plane 28;

[0054] Therefore, when the mold is opened, the first locking plane 26 and the second locking plane 28 abut against each other to lock the movement of the second slider 8, thereby preventing the second slider 8 from performing linear core pulling and interfering with the product and damaging the product;

[0055] After the mold opening is completed, the driving mechanism 12 drives the turntable 11 to rotate. Since the second slider 8 needs to perform a second rotary core pulling, the second locking block 23 is driven by the upper mold plate 1 to continue to move upward, so that the third locking slope 27 is opposite to the second locking plane 28 and the lock of the second slider 8 is released, so that the turntable 11 drives the first slider 4 and the second slider 8 in the slide seat 3 to be pulled out along the arc trajectory direction of the turbine blade to achieve the second core pulling.

[0056] The specific structure of the first slider 4 and the second slider 8 is as follows: the first slider 4 is provided with an orientation protrusion 29 , the second slider 8 is provided with an orientation groove 30 , and the orientation protrusion 29 is slidably disposed in the orientation groove 30 .

[0057] In this embodiment, a rotating bearing 31 is provided between the rotating disk 11 and the mold core seat 13. The rotating precision and stability of the rotating disk 11 are ensured by the design of the rotating bearing.

[0058] In this embodiment, a hot flow nozzle 32 is provided in the upper mold plate 1, the hot flow nozzle 32 is close to the mold cavity, the hot flow nozzle 32 is connected to a feed plate 33, and the feed plate 33 is connected to an external material injection device. Thus, the material is injected into the feed plate 33 through the external material injection device, and then the material is sprayed into the mold cavity through the hot flow nozzle 32 through the feed plate 33 to complete the injection molding. This design is a hot runner mold design, which can ensure that the internal material is not solidified all the time, so the molding cycle is short, and because there is no cooling runner system, no material head will be generated, thereby saving more raw materials.

[0059] In this embodiment, since the turbine must work in a very harsh environment, the turbine is made of polyetheretherketone, i.e. PEEK material, which is a polymer compound with excellent mechanical properties and good self-lubrication, resistance to chemical corrosion, flame retardancy, peeling resistance and wear resistance, but it is relatively expensive, and the temperature of the mold during operation is maintained above 200 degrees Celsius. In summary, it is more suitable to cooperate with a hot runner mold.

[0060] The specific operation process of this rotary core-pulling mold is:

[0061] 1) When the mold is closed, the first slider 4 is locked by the first locking block 22 (the second slider 8 is limited by the first slider 4 when it does not slide, so it will not slide either, so the sliding problem of the second slider 8 is not considered when the mold is closed). At this time, the first mold core 7, the second mold core 10 and the third mold core 14 are in a stable static state, and then the external material injection device injects the material into the feed plate 33, and then the material is sprayed into the cavity through the hot flow nozzle 32 through the feed plate 33 to complete the injection molding.

[0062] 2) When the mold is opened, the upper mold plate 1 moves upward, thereby driving the inclined guide column 5 and the first locking block 22 to move upward. At this time, the first slider 4 contacts and interferes with the first locking block 22, so that the inclined guide column 5 drives the first slider 4 to slide outward to complete the first core pulling of the turbine blade. Due to the design of the second locking block 22, the second slider 8 is locked to prevent the first slider 4 from driving the second slider 8 to perform linear core pulling and damage the product.

[0063] 3) After the mold is opened, the telescopic rod 18 is driven to move by the oil cylinder 20, and the telescopic rod 18 indirectly drives the turntable 11 to rotate by rotating the gear 19, causing the turntable 11 to rotate and drive the transmission rod 16 to move in the track groove 15, and then the transmission rod 16 drives the first slider 4 and the second slider 8 on the slide 3 to realize the rotational core pulling movement, that is, the second core pulling of the turbine blade.

[0064] 4) After the core pulling is completed, the product is taken out by a robot or manually to complete the demoulding process.

[0065] The above embodiment is only one of the more preferred solutions of this patent. Any changes that do not depart from the scope of this technical solution are within the scope of this patent.

Claims

1. A rotary core-pulling mold for manufacturing a turbine, comprising an upper mold plate and a lower mold plate, characterized in that: The lower mold plate is provided with a plurality of slide seats distributed circumferentially, the slide seats are provided with a first slide block and an inclined guide column, the inclined guide column passes through the first slide block and is connected to the upper mold plate, and the front end of the first slide block is provided with a first mold core for forming the upper half structure of the turbine blade; The slide seat is further provided with a second slide block abutting against the first slide block, and the front end of the second slide block is provided with a second mold core forming the lower half structure of the turbine blade. The lower mold plate is further provided with a turntable, which is transmission-connected with the slide seat, and the turntable is connected with a driving mechanism, and the driving mechanism drives the turntable to rotate, so that the turntable drives the first and second slide blocks in the slide seat to be pulled out outward along the arc track direction of the turbine blade; A mold core seat is also provided in the lower mold plate, and a third mold core for forming the inner hole of the turbine is extended upward from the mold core seat. The first mold core, the second mold core and the third mold core form a cavity for producing the turbine. A locking cavity is provided in the lower mold plate, and a first locking block is provided in the locking cavity to prevent the first slider from moving and affecting injection molding when the mold is closed, and the first locking block is directly opposite to the first slider and connected to the upper mold plate. A second locking block is also provided in the locking cavity to prevent the first slider from driving the second slider when the mold is opened, and the second locking block is directly opposite to the second slider and connected to the upper mold plate; A hot flow nozzle is arranged in the upper mold plate, the hot flow nozzle is close to the mold cavity, the hot flow nozzle is connected to a feed plate, and the feed plate is connected to an external material injection device.

2. The rotary core-pulling mold for manufacturing a turbine according to claim 1, characterized in that: The turntable is provided with a track groove, and the lower end of the slide seat is provided with a transmission rod. When the turntable rotates, the transmission rod moves along the track groove, and the movement track of the transmission rod is consistent with the arc track of the turbine blade.

3. The rotary core-pulling mold for manufacturing a turbine according to claim 2, characterized in that: The rotary core-pulling mold also includes a base plate located below the lower mold plate. The driving mechanism includes a telescopic rod and a rotating gear arranged on the base plate. The rotating gear is respectively connected to the telescopic rod and the turntable gear. The telescopic rod is connected to an oil cylinder.

4. The rotary core-pulling mold for manufacturing a turbine according to claim 1, characterized in that: The first locking block is provided with a first locking inclined surface, and the rear end of the first sliding block is provided with a second locking inclined surface; When the mold is closed, the first locking inclined surface cooperates with the second locking inclined surface to lock the movement of the first slider; When the mold is opened, the upper mold plate drives the inclined guide column and the first locking block to move upward at the same time, and the first locking inclined surface faces upward, so that the first slider slides outward through the inclined guide column to achieve the first core pulling.

5. The rotary core-pulling mold for manufacturing a turbine according to claim 1, characterized in that: The second locking block is provided with a first locking plane and a third locking inclined plane connected to the first locking plane, and the rear end of the second sliding block is provided with a second locking plane; When the mold is opened, the first locking plane abuts against the second locking plane to lock the movement of the second slider; After the mold is opened, the driving mechanism drives the turntable to rotate, and at the same time the third locking slope faces the second locking plane to release the lock on the second slider, so that the turntable drives the first slider and the second slider in the slide seat to be pulled outward along the arc trajectory direction of the turbine blade to achieve the second core pulling.

6. The rotary core-pulling mold for manufacturing a turbine according to claim 1, characterized in that: The first sliding block is provided with a directional protrusion, and the second sliding block is provided with a directional groove. The directional protrusion is slidably arranged in the directional groove.

7. The rotary core-pulling mold for manufacturing a turbine according to claim 3, characterized in that: A rotating bearing is arranged between the rotating disk and the mold core seat.

8. The rotary core-pulling mold for manufacturing a turbine according to claim 1, characterized in that: The turbine is made of polyetheretherketone material, and the temperature of the mold is maintained above 200 degrees Celsius during operation.

Images