Multi-profile aviation diaphragm hot press molding device

Abstract

The utility model discloses a multi-profile aviation diaphragm hot press molding device. The bottom face of the upper die base protrudes downwards to form a convex cone, and the middle of the convex cone integrally protrudes outwards to form an upper die base parting face. The top face of the lower die base is concave downwards to form a concave cone, and the middle of the concave cone is integrally concave downwards to form a lower die base parting face. When the convex cone and the concave cone are oppositely combined, the parting surfaces of the upper die holder and the lower die holder are respectively matched with the inner profile and the outer profile of the multi-profile aviation diaphragm to be subjected to hot press molding; an exhaust valve is slidably connected into a step through hole in the center of the parting surface of the upper die holder, the top end of the exhaust valve is connected with an elastic pre-tightening assembly, the bottom end of the exhaust valve is conical and matched with a conical orifice in the bottom end of the step through hole, when the upper die holder and the lower die holder are in a separated state, the bottom end of the exhaust valve protrudes out of the parting surface of the upper die holder, and orifices in the top end and the bottom end of the step through hole are communicated; when the upper die holder and the lower die holder are in an involution state, the bottom end face of the exhaust valve is flush with the parting surface of the upper die holder, and top and bottom end orifices of the stepped through hole are separated. According to the utility model, bubbles, bulges, exposed cloth and wrinkles of the original process device can be eliminated.

Description

Technical Field

[0001] This utility model relates to the field of hot pressing molding technology, and in particular to a hot pressing molding device for multi-faceted aviation films. Background Technology

[0002] Aerospace diaphragms are crucial sensitive components in aerospace cockpit pressure regulators, used to isolate and regulate pressure in valves and various pumps that use gas or liquid as media, thereby controlling mechanical actions. To enhance the mechanical properties of these components and meet the requirements of regulators, aerospace diaphragms are generally composed of two parts: fabric and rubber. The quality requirements for diaphragms are very high, especially for multi-faceted diaphragms used in instruments that require sensitive pressure responses. Strict requirements are placed on their surface quality and thickness uniformity. The thickness tolerance of aerospace diaphragms must be within 0.05 mm, and the difference between the maximum and minimum thickness must be less than 0.075 mm. Defects such as bubbles, protrusions, exposed fabric, and wrinkles are not allowed. Previously, the pass rate for aerospace diaphragms produced using existing processes was only 10% due to quality issues, severely hindering product development and production progress. Utility Model Content

[0003] The purpose of this invention is to provide a multi-faceted aerospace diaphragm hot pressing forming device. This invention can effectively eliminate defects such as bubbles, protrusions, exposed fabric, and wrinkles produced by the original process equipment, increasing the pass rate of diaphragm hot pressing forming from 10% to 90%.

[0004] The technical solution of this utility model is: a multi-faceted aviation film hot pressing forming device, including an upper mold base and a lower mold base that are aligned in the upper and lower directions; the bottom surface of the upper mold base protrudes downward to form a convex cone, and the middle part of the convex cone protrudes outward to form the parting surface of the upper mold base; the top surface of the lower mold base is concave to form a concave cone, and the middle part of the concave cone is concave to form the parting surface of the lower mold base; when the convex and concave cones are aligned, the parting surface of the upper mold base matches the inner surface of the multi-faceted aviation film to be hot pressed, and the parting surface of the lower mold base matches the outer surface of the multi-faceted aviation film to be hot pressed; The upper mold base has a stepped through hole at the center of the parting surface. An exhaust valve is slidably connected in the stepped through hole. The top of the exhaust valve is connected to the elastic pre-tightening component. The bottom of the exhaust valve is conical and fits with the conical opening at the bottom of the stepped through hole. When the upper and lower mold bases are in the separated state, the bottom of the exhaust valve protrudes from the parting surface of the upper mold base under the action of the elastic pre-tightening component, and the top and bottom openings of the stepped through hole are connected. When the upper and lower mold bases are in the aligned state, the bottom end face of the exhaust valve is flush with the parting surface of the upper mold base, and the top and bottom openings of the stepped through hole are separated.

[0005] In the aforementioned multi-faceted aviation film hot pressing forming device, the outer edge of the lower mold base parting surface is provided with a material groove.

[0006] In the aforementioned multi-faceted aerospace film hot pressing molding device, the material trough is connected to the exhaust trough located on the bottom surface of the lower mold base via circumferentially arranged air guide holes.

[0007] In the aforementioned multi-faceted aerospace film hot pressing molding device, the bottom surface of the lower mold base is also provided with a weight reduction hole along the circumference, and the weight reduction hole is coaxial with the air guide hole.

[0008] In the aforementioned multi-faceted aviation film hot pressing molding device, the lower mold base within the mold parting surface range has one or more vent holes arranged circumferentially, and vent columns are fitted into the vent holes with gaps.

[0009] In the aforementioned multi-faceted aviation film hot pressing forming device, the axis of the ventilation column is coaxial with the axis of the hole to be punched on the multi-faceted aviation film to be hot pressed.

[0010] In the aforementioned multi-faceted aviation film hot pressing molding device, the bottom end of the ventilation column is movably connected to the adjusting screw plug, and the adjusting screw plug is threadedly connected to the lower mold base.

[0011] In the aforementioned multi-faceted aviation film hot pressing forming device, the elastic pre-tightening component includes a spring sheet fixed to the top of the exhaust valve by screws, and the spring sheets are all fixed to the stepped surface at the top of the stepped through hole by screws.

[0012] The advantages of this invention are: compared with traditional hot-press forming devices, this invention improves the structure and design concept based on the previous poor forming of aviation diaphragms, adding a venting structure that is easy to adjust, clean, and maintain. The hot-press forming device completely eliminates defects such as bubbles, protrusions, exposed fabric, and wrinkles produced by the original process, increasing the pass rate of diaphragm hot-press forming from 10% to 95%.

[0013] This utility model has a novel structure, is easy to adjust, and has strong scalability, which is beneficial to improving the quality and efficiency of aerospace diaphragm production. Attached Figure Description

[0014] Figure 1 This is a multi-faceted aerospace film hot pressing forming device;

[0015] Figure 2 This is a schematic diagram of the assembly of the vent column and the adjusting screw.

[0016] Figure 3 This is a simplified thermoforming device for original aviation films;

[0017] Figure 4 This is a plan view of the lower mold base of the hot pressing forming device;

[0018] Figure 5 This is a schematic diagram of a certain diaphragm surface. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0020] Example 1. A multi-faceted aerospace film hot pressing forming apparatus, see [link to example]. Figures 1-5 The upper mold base 8 and the lower mold base 2 are aligned vertically. The bottom surface of the upper mold base 8 protrudes downward to form a convex cone 9, and the middle part of the convex cone 9 protrudes outward to form the parting surface of the upper mold base. The top surface of the lower mold base 2 is recessed to form a concave cone 10, and the middle part of the concave cone 10 is recessed to form the parting surface of the lower mold base. When the convex and concave cones are aligned, the parting surface of the upper mold base matches the inner surface of the multi-faceted aviation film to be hot-pressed, and the parting surface of the lower mold base matches the outer surface of the multi-faceted aviation film to be hot-pressed. A stepped through hole 11 is provided at the center of the parting surface of the upper mold base, and an exhaust valve 5 is slidably connected in the stepped through hole 11. The top of the vent valve 5 is connected to the elastic pre-tightening component, and the bottom of the vent valve 5 is conical, engaging with the conical opening at the bottom of the stepped through hole 11. The effective contact area between the conical surface of the vent valve 5 and the inner conical surface of the conical opening is greater than 80%. After the upper mold base 8 is installed, when the upper and lower mold bases are in a separated state, the bottom of the vent valve 5 protrudes from the parting surface of the upper mold base under the action of the elastic pre-tightening component, and the top and bottom openings of the stepped through hole 11 are connected. When the upper and lower mold bases are in a mating state, the bottom end face of the vent valve 5 is flush with the parting surface of the upper mold base, and the top and bottom openings of the stepped through hole 11 are separated. The upper mold base 8 and the lower mold base 2 are guided by convex and concave conical surfaces to ensure concentricity.

[0021] The outer side of the upper mold base 8 is provided with a flat surface to facilitate the installation of the handle 1.

[0022] The exhaust valve 5 and the stepped through hole 11 have a flat surface that extends upward along the axis on the column body. This structure does not affect the guidance of the exhaust valve 5 and facilitates exhaust.

[0023] After the upper and lower mold bases are aligned, a 1mm gap is maintained between the top surface of the concave cone 10 and the bottom surface of the convex cone 9.

[0024] The upper and lower mold bases are matched according to the radial shrinkage of the diaphragm of 1.7% and the axial shrinkage rate of 7.8%.

[0025] The outer edge of the parting surface of the lower mold base is provided with a material overflow groove 12.

[0026] The material trough 12 is connected to the exhaust trough 14 located on the bottom surface of the lower mold base 2 via 10 circumferentially arranged air guide holes 13.

[0027] The bottom surface of the lower mold base 2 is also provided with a weight reduction hole 15 along the circumference to facilitate operation. The weight reduction hole 15 is coaxial with the air guide hole 13.

[0028] The lower mold base 2, located within the parting surface of the lower mold base, has one or more vent holes 16 arranged circumferentially, with vent columns 3 fitted inside the vent holes 16 with clearance. The bottom ends of the vent holes 16 on each ring are also connected via vent grooves 14.

[0029] The axis of the vent column 3 is coaxial with the axis of the hole to be punched on the multi-faceted aviation diaphragm to be hot-pressed. The vent column 3 is located at the part of the diaphragm that needs to be punched, which can both vent air and leave a punching position mark line on the diaphragm. The vent column 3 and the vent hole 16 maintain a 0.05 single-sided gap to form an air gap. This size can prevent excess material from squeezing into the vent gap (air gap) and forming wrinkles.

[0030] The bottom end of the vent column 3 is movably connected to the adjusting screw plug 4, which is threadedly connected to the lower mold base 2. The adjusting screw plug 4 serves to adjust and maintain the vent column 3. The bottom of the vent column 3 is hung in the T-shaped groove at the top of the adjusting screw plug 4. Rotating the adjusting screw plug can adjust the height of the vent column and also facilitates the cleaning of debris in the exhaust hole, keeping the exhaust passage unobstructed.

[0031] The elastic preload assembly includes a spring plate 7 fixed to the top of the exhaust valve 5 by screws 6, and the spring plates 7 are all fixed to the stepped surface at the top of the stepped through hole 11 by screws 6.

Claims

1. A multi-faceted aerospace film hot pressing forming device, characterized in that, It includes an upper mold base (8) and a lower mold base (2) that are aligned in the upper and lower directions; the bottom surface of the upper mold base (8) is convex to form a convex cone (9), and the middle part of the convex cone (9) is convex to form the parting surface of the upper mold base; the top surface of the lower mold base (2) is concave to form a concave cone (10), and the middle part of the concave cone (10) is concave to form the parting surface of the lower mold base; when the convex and concave cones are aligned, the parting surface of the upper mold base matches the inner surface of the multi-faceted aviation film to be hot-pressed, and the parting surface of the lower mold base matches the outer surface of the multi-faceted aviation film to be hot-pressed; a stepped through hole (11) is provided at the center of the parting surface of the upper mold base. An exhaust valve (5) is slidably connected inside the stepped through hole (11). The top of the exhaust valve (5) is connected to the elastic pre-tightening component. The bottom of the exhaust valve (5) is conical and matches the conical opening at the bottom of the stepped through hole (11). When the upper and lower mold bases are in a separated state, the bottom of the exhaust valve (5) protrudes from the parting surface of the upper mold base under the action of the elastic pre-tightening component, and the top and bottom openings of the stepped through hole (11) are connected. When the upper and lower mold bases are in a mating state, the bottom end face of the exhaust valve (5) is flush with the parting surface of the upper mold base, and the top and bottom openings of the stepped through hole (11) are separated.

2. The multi-faceted aerospace film hot pressing forming apparatus according to claim 1, characterized in that, The outer edge of the parting surface of the lower mold base is provided with a material overflow groove (12).

3. The multi-faceted aerospace film hot pressing forming apparatus according to claim 2, characterized in that, The material trough (12) is connected to the exhaust trough (14) located on the bottom surface of the lower mold base (2) via the circumferentially arranged air guide hole (13).

4. The multi-faceted aerospace film hot pressing forming apparatus according to claim 3, characterized in that, The bottom surface of the lower mold base (2) is also provided with a weight reduction hole (15) along the circumferential direction. The weight reduction hole (15) is coaxial with the air guide hole (13).

5. The multi-faceted aerospace film hot pressing forming apparatus according to claim 1, characterized in that, The lower mold base (2) located within the parting surface of the lower mold base has more than one ring of ventilation holes (16) along its circumferential direction, and ventilation columns (3) are fitted inside the ventilation holes (16) with clearance.

6. The multi-faceted aerospace film hot pressing forming apparatus according to claim 5, characterized in that, The axis of the ventilation column (3) is coaxial with the axis of the hole to be punched on the multi-faceted aviation diaphragm to be hot-pressed.

7. The multi-faceted aerospace film hot pressing forming apparatus according to claim 5, characterized in that, The bottom end of the ventilation column (3) is movably connected to the adjusting screw (4), and the adjusting screw (4) is threadedly connected to the lower mold base (2).

8. The multi-faceted aerospace film hot pressing forming apparatus according to claim 1, characterized in that, The elastic preload assembly includes a spring plate (7) fixed to the top of the exhaust valve (5) by screws (6), and the spring plates (7) are all fixed to the stepped surface at the top of the stepped through hole (11) by screws (6).

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