Room temperature vulcanized silicone rubber pouring device and method

Abstract

The invention discloses a room temperature vulcanized silicone rubber pouring device and method, and relates to the field of pouring machines, the room temperature vulcanized silicone rubber pouring device comprises a supporting frame, a driving rod, a pouring movable mechanism and a rubber cup, the rubber cup is fixed on the supporting frame, the driving rod is connected to the supporting frame and vertically slides with the supporting frame, and the bottom of the driving rod is connected with the pouring movable mechanism; the glue filling movable mechanism comprises a movable disc, a connecting ring, a long rod, a fixed rod, a sealing disc and a glue pipe, the movable disc is connected with the connecting disc through the connecting rod, the connecting disc is installed at the bottom of the driving rod, the movable disc slides on the connecting ring in the axis direction of the connecting ring, the connecting rod penetrates through a middle through hole of the connecting ring, and the fixed rod is connected between the connecting ring and the sealing disc; the long rod is connected to the side, away from the connecting disc, of the movable disc. The glue cup is arranged below the glue filling moving mechanism, the sealing disc seals an opening of the glue cup, an exhaust hole is formed in the sealing disc, and the end of the long rod is matched with the exhaust hole; the rubber pipe is connected to the sealing disc. The problem that air is mixed when a glue solution is transferred from a glue cup to a glue pipe is solved.

Description

Technical Field

[0001] The present application belongs to the field of glue filling machines, and specifically relates to a bubble-free glue filling device and method for room temperature vulcanized silicone rubber. Background Art

[0002] During the development of remote sensors for aerospace applications, optical components are typically connected to metal structures using adhesive bonding. However, conventional gluing processes have proven to generate tiny bubbles within the colloid, while the pouring process can produce larger bubbles within the colloid. These bubbles directly affect the bonding strength of the RTV silicone rubber. Because the number and size of bubbles are uncontrollable, inconsistent tensile modulus within the glue patch can lead to variations in the reflector's surface shape and even affect the product's mechanical properties. Reducing the number of bubbles within the glue patch can effectively improve the performance of the RTV silicone rubber, essentially approaching its theoretical performance. The conventional pouring process involves pouring the RTV silicone rubber from the glue cup directly into the injection syringe, introducing air into the rubber during this process. Summary of the Invention

[0003] The technical problem solved by the present application is: to overcome the shortcomings of the existing technology and provide a room temperature vulcanized silicone rubber filling device, which guides the room temperature vulcanized silicone rubber in the glue cup into the glue injection needle tube while isolating from the air, avoiding the generation of bubbles, and solving the problem that air is mixed into the room temperature vulcanized silicone rubber when it is transferred from the glue cup to the glue injection needle tube, resulting in discrete glue spot performance.

[0004] The technical solutions provided in this application are as follows:

[0005] The cam is connected to the support frame and moves vertically relative to the support frame, and the bottom of the driving rod is connected to the cam; the cam comprises a movable disk, a connecting ring, a long rod, a fixed rod, a sealing disk and a rubber hose; one side of the movable disk is connected to the connecting disk through a connecting rod, and the connecting disk is installed at the bottom of the driving rod; the movable disk slides relative to the connecting ring along the axial direction of the connecting ring; the connecting rod passes through the middle through-hole position of the connecting ring, the fixed rod is connected between the connecting ring and the sealing disk, and the long rod is connected to the side of the movable disk facing away from the connecting disk; the rubber cup is located below the cam and faces the sealing disk; the sealing disk is used to seal the opening of the rubber cup; the sealing disk is provided with an exhaust hole, and the end of the long rod cooperates with the exhaust hole; the rubber hose is connected to the surface of the sealing disk facing away from the fixed rod, and the glue in the rubber cup flows out through the rubber hose.

[0006] The diameter of the middle through hole of the connecting ring is smaller than the outer diameter of the movable disk. The connecting ring is located between the movable disk and the connecting disk. A limiting hole is provided on the movable disk, and the fixing rod passes through the limiting hole.

[0007] The bottom end of the long rod is connected with a small rubber ring, which is matched with the exhaust hole.

[0008] The fixing rod includes a main body section and a small diameter section at one end close to the connecting ring. The small diameter section cooperates with the limiting hole. The diameter of the small diameter section is smaller than the diameter of the end portion where the main body section and the small diameter section are connected. A step surface is formed between the small diameter section and the main body section. When the movable disk moves to contact the step surface, the small rubber ring is stuck in the exhaust hole.

[0009] A large rubber ring is installed on the outer edge of the sealing disk, and the large rubber ring is matched with the inner wall of the rubber cup.

[0010] At least two fixing rods are provided, and the at least two fixing rods are evenly distributed in the circumferential direction of the connecting ring.

[0011] The connecting plate and the bottom of the driving rod are detachably connected via a quick-release clamp joint; the rubber cup is detachably fixed to the supporting frame via a rubber cup fixing seat.

[0012] The end of the rubber hose is connected with a rubber injection needle.

[0013] A glue pouring method for a room temperature vulcanized silicone rubber glue pouring device, comprising:

[0014] The glue cup filled with glue is fixed to the support frame;

[0015] The driving rod moves downward, and the driving rod drives the glue pouring movable mechanism to move downward as a whole until the sealing disk contacts the upper edge of the glue cup. The sealing disk stops moving temporarily, and the long rod continues to move downward until the long rod is stuck in the exhaust hole. The glue pouring movable mechanism continues to move downward as a whole. At this time, the air in the glue cup is discharged through the rubber hose. When a small amount of silicone rubber flows out of the rubber hose, glue injection begins.

[0016] After the glue injection is completed, the driving rod moves upward, the sealing disc stops moving temporarily, and the long rod moves upward until the movable disc contacts the lower surface of the connecting ring. At this time, the small rubber ring is separated from the exhaust hole, and then the glue injection movable mechanism moves upward as a whole until the sealing disc is separated from the glue cup.

[0017] In summary, this application has at least the following beneficial technical effects:

[0018] First, in the present invention, the glue filling mechanism can completely empty the air in the glue cup, ensuring that the glue flowing into the glue injection needle is free of air, effectively improving the problem of bubbles in the glue spot during the gluing process; after the glue filling is completed, the long rod first moves upward, and air enters the glue cup through the exhaust hole, preventing the glue from flowing back; the glue cup is made of polytetrafluoroethylene, the glue filling machine is easy to clean and maintain, and the use cost is low;

[0019] Secondly, in the present invention, a motor control system is adopted, and the glue filling time, speed and glue filling amount are controllable, the operation process is more convenient, and the problem of uncontrollable manual glue filling amount is avoided, thereby further improving the quality of subsequent glue spots. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the glue filling device;

[0021] Figure 2 It is a structural diagram of the glue filling activity mechanism;

[0022] Figure 3 It is a cross-sectional view of the glue filling mechanism.

[0023] Explanation of the accompanying numbers: 1. Support frame; 2. Control system; 3. Stepper motor; 4. Driving rod; 5. Quick-release clamp connector; 6. Glue pouring mechanism; 7. Rubber hose; 8. Glue injection needle; 9. Glue cup; 10. Glue cup fixing seat; 11. Long rod; 12. Large rubber ring; 13. Sealing disk; 131. Exhaust hole; 14. Small rubber ring; 15. Movable disk; 16. Connecting ring; 17. Fixing rod. DETAILED DESCRIPTION

[0024] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments disclosed in the present invention will be further described in detail below with reference to the accompanying drawings.

[0025] The present application discloses a room temperature vulcanized silicone rubber glue filling device and method, such as Figure 1 and Figure 2 As shown, it includes a support frame 1, a control system 2, a stepper motor 3, a driving rod 4, a quick-release clamp joint 5, a glue pouring mechanism 6 and a glue cup 9.

[0026] like Figure 2 and Figure 3 As shown, the driving rod 4 is connected to the support frame 1, and the stepping motor 3 is used to drive the driving rod 4 to move vertically relative to the support frame 1. The bottom end of the driving rod 4 is connected to the glue injection movable mechanism 6 through a quick-release clamp joint 5. The glue pouring movable mechanism 6 includes a movable disk 15, a connecting ring 16, a long rod 11, a fixed rod 17, a sealing disk 13 and a hose 7. One side of the movable disk 15 is connected to the connecting disk through a connecting rod, and the connecting disk is used to connect to the bottom end of the driving rod 4 through a quick-release clamp joint 5; the connecting ring 16 is located between the movable disk 15 and the connecting disk, and the connecting rod passes through the middle through hole of the connecting ring. The diameter of the middle through hole of the connecting ring is smaller than the outer diameter of the movable disk 15; the two ends of the fixed rod 17 are respectively connected to the connecting ring 16 and the sealing disk 13, and a limiting hole is provided on the movable disk 15. The fixed rod 17 passes through the limiting hole so that the movable disk 15 and the connecting ring 16 can only move relative to each other along the axial direction of the fixed rod 17. At least two fixed rods 17 are provided, and the fixed rods 17 are evenly distributed circumferentially around the connecting ring 16.

[0027] The rubber cup 9 is placed just below the sealing disk 13 and is used to contain the silicone rubber. A rubber cup fixing seat 10 is mounted on the support frame 1 and is used to fix the rubber cup 9 on the support frame 1 .

[0028] The sealing disk 13 is provided with an exhaust hole 131, which is directly opposite to the long rod 11. The bottom end of the long rod 11 is connected to a small rubber ring 14. When the long rod 11 moves toward the sealing disk 13 until the small rubber ring 14 is stuck in the exhaust hole 131, the exhaust hole 131 is sealed. The fixed rod 17 includes a main body section and a small diameter section at one end close to the connecting ring 16. The small diameter section cooperates with the limiting hole. The diameter of the small diameter section is smaller than the diameter of the end portion where the main body section and the small diameter section are connected. A step surface is formed between the small diameter section and the main body section. The step surface is used to limit the moving stroke of the movable disk 15. When the movable disk 15 moves to contact the step surface, the small rubber ring 14 is stuck in the exhaust hole 131, as shown in FIG. Figure 3 shown.

[0029] The outer edge of the sealing disk 13 is provided with a large rubber ring 12, which cooperates with the inner wall of the rubber cup 9. The large rubber ring 12 can penetrate into the rubber cup 9, and the opening of the rubber cup 9 is sealed when the large rubber ring 12 contacts the inner wall of the rubber cup 9.

[0030] A rubber hose 7 is installed on the surface of the sealing disk 13 connected to the fixing rod 17 . One end of the rubber hose 7 is used to connect to the glue injection needle 8 , and the other end is connected to the surface of the sealing disk 13 away from the fixing rod 17 .

[0031] Glue filling methods include:

[0032] like Figure 1 As shown, the glue cup 9 filled with room temperature vulcanized silicone rubber is fixed to the glue cup fixing seat 10, the control system issues a downward command, the stepping motor 3 provides downward power, the driving rod 4 moves downward, the glue filling movable mechanism 6 follows, and the large rubber ring 12 contacts the upper edge of the glue cup 9 to generate resistance. The sealing disk 13 temporarily stops moving, and the long rod 11 continues to move downward. After the small rubber ring 14 at the front end of the long rod 11 blocks the exhaust hole in the sealing disk 13, the glue filling movable mechanism 6 continues to move downward as a whole. At this time, the air in the glue cup 9 is discharged through the rubber tube 7. When a small amount of silicone rubber flows out of the rubber tube 7, it means that the air in the glue cup 9 has been completely discharged. The glue injection needle 8 with a syringe plug is connected to the rubber tube 7. Then, as the glue filling movable mechanism 6 continues to move downward as a whole, the silicone rubber is smoothly introduced into the glue injection needle 8 and discharged from the glue injection needle 8.

[0033] When the silicone rubber is completely discharged, the control system issues a stop command, and stepper motor 3 stops working. The control system issues an upward command, and stepper motor 3 provides upward power, causing drive rod 4 to move upward. At this point, sealing disk 13 temporarily stops moving, and long rod 11 moves upward until movable disk 15 contacts the lower surface of connecting ring 16. At this point, small rubber ring 14 disengages from vent 131, ensuring that air enters the rubber cup 7 through the vent of sealing disk 13, preventing the silicone rubber in injection needle 8 from flowing back. Drive rod 4 then continues to move upward, driving sealing disk 13 upward as well (i.e., the entire glue injection mechanism 6 moves upward). After large rubber ring 12 separates from glue cup 9 for a certain distance, the control system issues a stop command, and stepper motor 3 stops working, separating injection needle 8 from rubber tube 7, which was used to introduce silicone rubber.

[0034] like Figure 2 As shown, the rubber hose 7 and the sealing disk 13, as well as the rubber hose 7 and the glue injection needle are connected via threaded quick connectors, which facilitate disassembly and replacement.

[0035] The present invention has been applied in a space remote sensor for bonding the primary reflector to a structural component. In this application, the fracture surface of the cured specimens produced by this device was smooth and free of bubbles, significantly superior to pouring silicone rubber directly into a syringe.

[0036] During operation, the capacity of the glue cup is 50-150g; the glue cup is made of polytetrafluoroethylene material, which is easy to clean the residual silicone rubber and can be fully recycled; (3) The downward movement speed of the glue filling mechanism is less than 1mm / s, otherwise the silicone rubber will flow too fast in the hose.

[0037] This invention has been applied in the development of space remote sensors, for bonding primary reflectors to structural components. After curing, the fractured surfaces of the specimens produced by this device were smooth and free of bubbles. The effect of cured silicone rubber on the image quality of the primary reflector was within acceptable limits, significantly superior to pouring the silicone rubber directly into a syringe.

[0038] The contents not described in detail in this application specification are common knowledge to those skilled in the art.

[0039] The present application has been described in detail above with reference to specific embodiments and exemplary examples. However, these descriptions should not be construed as limiting the present application. Those skilled in the art will appreciate that, without departing from the spirit and scope of the present application, various equivalent substitutions, modifications, or improvements may be made to the technical solutions and implementations of the present application, all of which fall within the scope of the present application. The scope of protection of the present application shall be determined by the appended claims.

Claims

1. A room temperature vulcanized silicone rubber glue pouring device, characterized in that: The invention comprises a support frame (1), a driving rod (4), a glue pouring movable mechanism (6) and a glue cup (9), wherein the glue cup (9) is fixed to the support frame (1), the driving rod (4) is connected to the support frame (1) and moves vertically relative to the support frame (1), and the bottom of the driving rod (4) is connected to the glue pouring movable mechanism (6); The glue pouring movable mechanism (6) comprises a movable disk (15), a connecting ring (16), a long rod (11), a fixed rod (17), a sealing disk (13) and a rubber hose (7). One side of the movable disk (15) is connected to a connecting disk via a connecting rod. The connecting disk is mounted on the bottom of the driving rod (4). The movable disk (15) slides relative to the connecting ring (16) along the axial direction of the connecting ring (16). The connecting rod passes through a middle through hole of the connecting ring. The fixed rod (17) is connected between the connecting ring (16) and the sealing disk (13). The long rod (11) is connected to a side of the movable disk (15) that is away from the connecting disk. The glue cup (9) is located below the glue pouring movable mechanism (6) and is directly opposite to the sealing disk (13). The sealing disk (13) is used to seal the opening of the glue cup (9). The sealing disk (13) is provided with an exhaust hole (131). The end of the long rod (11) cooperates with the exhaust hole (131). The rubber hose (7) is connected to the surface of the sealing disk (13) facing away from the fixing rod (17), and the rubber liquid in the rubber cup (9) flows out through the rubber hose (7).

2. A room temperature vulcanized silicone rubber glue pouring device according to claim 1, characterized in that: The diameter of the middle through hole of the connecting ring is smaller than the outer diameter of the movable disk (15). The connecting ring (16) is located between the movable disk (15) and the connecting disk. The movable disk (15) is provided with a limiting hole, and the fixing rod (17) passes through the limiting hole.

3. A room temperature vulcanized silicone rubber glue pouring device according to claim 1, characterized in that: The bottom end of the long rod (11) is connected with a small rubber ring (14), and the small rubber ring (14) cooperates with the exhaust hole (131).

4. A room temperature vulcanized silicone rubber glue pouring device according to claim 3, characterized in that: The fixing rod (17) comprises a main body section and a small diameter section at one end close to the connecting ring (16); the small diameter section cooperates with the limiting hole; the diameter of the small diameter section is smaller than the diameter of the end portion where the main body section and the small diameter section are connected; a step surface is formed between the small diameter section and the main body section; when the movable disk (15) moves to contact the step surface, the small rubber ring (14) is inserted into the exhaust hole (131).

5. The room temperature vulcanized silicone rubber glue pouring device according to claim 1, characterized in that: A large rubber ring (12) is installed on the outer edge of the sealing disk (13), and the large rubber ring (12) cooperates with the inner wall of the rubber cup (9).

6. A room temperature vulcanized silicone rubber glue pouring device according to claim 1, characterized in that: At least two fixing rods (17) are provided, and the at least two fixing rods (17) are evenly distributed in the circumferential direction of the connecting ring (16).

7. The room temperature vulcanized silicone rubber glue pouring device according to claim 1, characterized in that: The connection plate and the bottom of the driving rod (4) are detachably connected via a quick-release clamp joint (5); the rubber cup (9) is fixed to the support frame (1) via a rubber cup fixing seat (10).

8. The room temperature vulcanized silicone rubber glue pouring device according to claim 1, characterized in that: The end of the rubber hose (7) is connected to a rubber injection needle tube (8).

9. A method for glue pouring a room temperature vulcanized silicone rubber glue pouring device according to any one of claims 1 to 9, characterized in that: include: A glue cup (9) filled with glue liquid is fixed to the supporting frame (1); The driving rod (4) is moved downward, and the driving rod (4) drives the glue injection movable mechanism (6) to move downward as a whole, until the sealing disk (13) contacts the upper edge of the glue cup (9), the sealing disk (13) temporarily stops moving, the long rod (11) continues to move downward, until the long rod (11) is stuck in the exhaust hole (131), and the glue injection movable mechanism (6) continues to move downward as a whole. At this time, the air in the glue cup (9) is discharged through the rubber hose (7), and when a small amount of silicone rubber flows out of the rubber hose (7), glue injection begins; After the glue injection is completed, the driving rod (4) is moved upward, at which time the sealing disk (13) temporarily stops moving, and the long rod (11) moves upward until the movable disk (15) contacts the lower surface of the connecting ring (16). At this time, the small rubber ring (14) is separated from the exhaust hole (131), and then the glue injection movable mechanism (6) moves upward as a whole until the sealing disk (13) is separated from the glue cup (9).

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