Pressure-stabilizing injection mechanism of liquid silica gel feeding machine

Abstract

The utility model discloses a pressure stabilizing injection mechanism of a liquid silica gel feeder, which comprises a feed mixer, a pressure stabilizing valve and a switch valve, the feed mixer is provided with a first feed port for feeding A gel and a second feed port for feeding B gel, and the first feed port and the second feed port are both communicated with an inner cavity of the feed mixer. A mixer outlet of the feeding mixer is connected with a pressure maintaining valve inlet of the pressure maintaining valve through a first connecting pipe, a pressure maintaining valve outlet of the pressure maintaining valve is connected with a switch valve inlet of the switch valve through a second connecting pipe, and a material injection pipe is arranged at a switch valve outlet of the switch valve. The liquid silica gel feeding device is reasonable in structural design, the pressure maintaining valve is additionally arranged between the feeding mixer and the switch valve, the pressure maintaining valve can stably control the pressure of liquid silica gel flowing through the position between the feeding mixer and the switch valve, the liquid silica gel is kept within a certain pressure range, and the feeding effect of the liquid silica gel feeding device is improved.

Description

Technical Field

[0001] This utility model relates to the field of liquid silicone feeder technology, and more specifically, to a pressure-stabilizing injection mechanism for a liquid silicone feeder. Background Technology

[0002] In the production process of liquid silicone, a liquid silicone feeding device is generally required to transport and supply the liquid silicone, thereby injecting it into injection molding machines or other molding equipment. Currently, common liquid silicone feeding devices on the market typically include a first feeding mechanism, a second feeding mechanism, a feed mixer, and a switching valve. The first and second feeding mechanisms respectively feed component A and component B into the feed mixer for mixing. After mixing, opening the switching valve allows the mixed liquid silicone to be injected into the injection molding machine or other molding equipment. However, during the liquid silicone transportation process, pressure instability often occurs, with pressure fluctuating between high and low levels, which affects the feeding effect of the liquid silicone. Utility Model Content

[0003] The purpose of this utility model is to overcome the above-mentioned defects in the prior art and provide a pressure-stabilizing injection mechanism for a liquid silicone feeder that can stably control the pressure of liquid silicone flowing between the feed mixer and the switching valve, keep the liquid silicone within a certain pressure range, and improve the feeding effect of the liquid silicone feeding equipment.

[0004] To achieve the above objectives, this utility model provides a pressure-stabilizing injection mechanism for a liquid silicone feeder, comprising a feeding mixer, a pressure-stabilizing valve, and a switching valve. The feeding mixer is provided with a first inlet for feeding A-type silicone and a second inlet for feeding B-type silicone. Both the first and second inlets are connected to the inner cavity of the feeding mixer. The mixer outlet of the feeding mixer is connected to the pressure-stabilizing valve inlet of the pressure-stabilizing valve via a first connecting pipe. The pressure-stabilizing valve outlet is connected to the switching valve inlet of the switching valve via a second connecting pipe. An injection pipe is provided at the switching valve outlet of the switching valve.

[0005] Preferably, the pressure regulating valve includes a pressure regulating valve housing, a pressure regulating valve front end cover, a pressure regulating valve rear end cover, an inner sleeve, a pressure regulating ball, a pressure regulating sealing ring, a spring retainer, a front spring, a pressure regulating valve push rod, a spring mounting post, a rear spring, and an adjusting nut. The pressure regulating valve front end cover and the pressure regulating valve rear end cover are respectively installed at the front and rear ends of the pressure regulating valve housing. The pressure regulating valve inlet is located at the bottom of the pressure regulating valve housing, and the pressure regulating valve outlet is located at the top of the pressure regulating valve housing. The inner sleeve is installed inside the front end of the pressure regulating valve housing, and the outer wall of the inner sleeve has several feed through holes. The pressure regulating sealing ring is installed at the rear end of the inner sleeve. The spring retainer and the pressure regulating ball are both installed inside the inner sleeve. The pressure-stabilizing ball is located between the spring retainer and the pressure-stabilizing sealing ring. The front spring is mounted on the spring retainer, and the rear end of the front spring abuts against one side of the pressure-stabilizing ball. The pressure-stabilizing valve push rod is movably mounted inside the pressure-stabilizing valve housing. The front end of the pressure-stabilizing valve push rod can pass through the central through hole of the pressure-stabilizing sealing ring and contact the other side of the pressure-stabilizing ball. The spring mounting post is mounted on the rear end of the pressure-stabilizing valve push rod, and the rear end spring is mounted outside the spring mounting post. The rear end of the spring mounting post is placed in the rear through hole of the adjusting nut. The outer wall thread of the adjusting nut is threadedly connected to the central threaded hole of the rear end cover of the pressure-stabilizing valve. The rear end of the rear end spring abuts against the inner rear end of the adjusting nut.

[0006] Preferably, a pressure regulating valve sealing ring is provided between the pressure regulating valve push rod and the inner wall of the pressure regulating valve housing.

[0007] Preferably, the adjusting nut is provided with a limiting ring on its exterior for limiting engagement with the rear end cover of the pressure regulating valve.

[0008] Preferably, the switching valve includes a switching valve housing, a cylinder housing, a switching valve front end cover, a switching valve rear end cover, a switching valve core, a discharge valve seat, a piston, and a valve. The switching valve front end cover, switching valve housing, cylinder housing, and switching valve rear end cover are connected sequentially from front to back. The switching valve inlet is located at the bottom of the switching valve housing, and the switching valve outlet is located in the middle of the switching valve front end cover and communicates with the interior of the switching valve housing. The discharge valve seat is installed between the switching valve housing and the switching valve front end cover, and a valve seat discharge through hole is passed through the middle of the discharge valve seat. The rear end of the switching valve core is installed on the piston, and the front end of the switching valve core is inserted into the interior of the switching valve housing and located behind the discharge valve seat. The piston is installed in the air chamber of the cylinder housing, and the valve is installed outside the cylinder housing. The air inlet of the valve communicates with the air chamber of the cylinder housing.

[0009] Preferably, a piston sealing ring is provided between the outer wall of the piston and the inner wall of the cylinder housing's air chamber.

[0010] Preferably, a pressure gauge is provided on the outside of the switch valve housing, and the pressure gauge is connected to the inside of the switch valve housing.

[0011] Preferably, the feed mixer is connected to the mounting bracket.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. The structure of this utility model is reasonable. A pressure regulating valve is added between the feed mixer and the switching valve. The pressure regulating valve can stably control the pressure of the liquid silicone flowing between the feed mixer and the switching valve, so that the liquid silicone is kept within a certain pressure range, thereby improving the feeding effect of the liquid silicone feeding equipment.

[0014] 2. The pressure regulating valve of this utility model adopts a spring-type pressure regulating valve structure, which includes a pressure regulating valve housing, a pressure regulating valve front end cover, a pressure regulating valve rear end cover, an inner sleeve, a pressure regulating ball, a pressure regulating sealing ring, a spring retainer, a front spring, a pressure regulating valve push rod, a spring mounting post, a rear spring, and an adjusting nut. It has a good pressure regulating effect, and the opening of the valve body can be quickly adjusted by rotating the adjusting nut. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the pressure-stabilizing injection mechanism of the liquid silicone feeder provided in this embodiment of the utility model;

[0017] Figure 2 This is a cross-sectional view of the pressure-stabilizing injection mechanism provided in this embodiment of the utility model;

[0018] Figure 3 This is a schematic diagram of the feeding mixer provided in an embodiment of the present invention;

[0019] Figure 4 This is an exploded view of the pressure regulating valve provided in this embodiment of the utility model;

[0020] Figure 5 This is a cross-sectional view of the pressure regulating valve provided in this embodiment of the utility model;

[0021] Figure 6 This is a cross-sectional view of the switching valve provided in an embodiment of this utility model. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] Please refer to Figure 1 and Figure 2 This utility model provides a pressure-stabilizing injection mechanism for a liquid silicone feeder, including a feeding mixer 1, a pressure-stabilizing valve 2, and a switching valve 3. The mixer outlet of the feeding mixer 1 is connected to the pressure-stabilizing valve inlet of the pressure-stabilizing valve 2 via a first connecting pipe 4. The pressure-stabilizing valve outlet of the pressure-stabilizing valve 2 is connected to the switching valve inlet of the switching valve 3 via a second connecting pipe 5. An injection pipe 6 is provided at the switching valve outlet of the switching valve 3. The various components of this embodiment will be described in detail below with reference to the accompanying drawings.

[0024] like Figure 1 and Figure 3 As shown, the feed mixer 1 has a first feed port 11 for feeding A glue and a second feed port 12 for feeding B glue on one side. The first feed port 11 and the second feed port 12 are both connected to the inner cavity of the feed mixer 1. The top of the feed mixer 1 has a mixer outlet 13.

[0025] During installation, the feed mixer 1 can be connected to the mounting bracket 7, and the feed mixer 1 can be installed on the frame of various liquid silicone feeders via the mounting bracket 7.

[0026] like Figure 4 and Figure 5As shown, the pressure regulating valve 2 may include a pressure regulating valve housing 21, a pressure regulating valve front end cover 22, a pressure regulating valve rear end cover 23, an inner sleeve 24, a pressure regulating ball 25, a pressure regulating sealing ring 26, a spring retainer 27, a front spring 28, a pressure regulating valve push rod 29, a spring mounting post 210, a rear spring 211, and an adjusting nut 212. The pressure regulating valve front end cover 22 and the pressure regulating valve rear end cover 23 are respectively installed at the front and rear ends of the pressure regulating valve housing 21. The pressure regulating valve inlet 215 is opened at the bottom of the pressure regulating valve housing 21, and the pressure regulating valve outlet 216 is opened at the top of the pressure regulating valve housing 21. The inner sleeve 24 is tubular and installed inside the front end of the pressure regulating valve housing 21. The outer wall of the inner sleeve 24 has several feed holes 241 for liquid silicone to enter. The pressure regulating sealing ring 26 is annular and installed at the rear end of the inner sleeve 24. The spring retainer... Both spring 27 and pressure-stabilizing ball 25 are installed inside the inner sleeve 24. The pressure-stabilizing ball 25 is located between the spring retainer 27 and the pressure-stabilizing sealing ring 26. The front spring 28 is installed on the spring retainer 27. The rear end of the front spring 28 abuts against one side of the pressure-stabilizing ball 25. The pressure-stabilizing valve push rod 29 is movably installed inside the pressure-stabilizing valve housing 21. The front end of the pressure-stabilizing valve push rod 29 can pass through the central through hole of the pressure-stabilizing sealing ring 26 and contact the other side of the pressure-stabilizing ball 25. The spring mounting post 210 is installed at the rear end of the pressure-stabilizing valve push rod 29. The rear end spring 211 is installed outside the spring mounting post 210. The rear end of the spring mounting post 210 is placed in the rear through hole of the adjusting nut 212. The outer wall thread of the adjusting nut 212 is threadedly connected to the central threaded hole of the pressure-stabilizing valve rear end cover 23. The rear end of the rear end spring 211 abuts against the inner rear end of the adjusting nut 212.

[0027] Preferably, a pressure regulating valve sealing ring 213 can be provided between the pressure regulating valve push rod 29 and the inner wall of the pressure regulating valve housing 21.

[0028] To limit the position of the adjusting nut 212, a limiting ring 214 may be provided on the outside of the adjusting nut 212 for limiting engagement with the rear end cover 23 of the pressure regulating valve. The adjusting nut 212 has a hexagonal threaded head on its rear end.

[0029] Under normal conditions, under the elastic action of the front spring 28 and the rear spring 211, the pressure stabilizing ball 25 is clamped between the front spring 28 and the pressure stabilizing valve push rod 29. There is a certain distance between the pressure stabilizing ball 25 and the pressure stabilizing sealing ring 26. At this time, the liquid silicone entering from the pressure stabilizing valve inlet 215 can flow through the central through hole of the pressure stabilizing sealing ring 26 and flow out from the pressure stabilizing valve outlet 216.

[0030] When the pressure of the liquid silicone entering through the pressure regulating valve inlet 215 is too high, the liquid silicone will push the pressure regulating ball 25 closer to the pressure regulating sealing ring 26, forcing the pressure regulating ball 25 to block the central through hole of the pressure regulating sealing ring 26. At this time, the pressure regulating valve is in the closed state. When the pressure of the liquid silicone decreases, the pressure regulating ball 25 can reset and move away from the central through hole of the pressure regulating sealing ring 26. At this time, the pressure regulating valve is in the open state.

[0031] The pressure regulating valve in this example has a reasonable structural design and good pressure stabilization effect. Rotating the adjusting nut can quickly adjust the distance between the pressure regulating ball and the central through hole of the pressure regulating sealing ring, thereby adjusting the opening of the valve body.

[0032] like Figure 6 As shown, the switching valve 3 may include a switching valve housing 31, a cylinder housing 32, a switching valve front cover 33, a switching valve rear cover 34, a switching valve core 35, a discharge valve seat 36, a piston 37, and a valve 38. The switching valve front cover 33, switching valve housing 31, cylinder housing 32, and switching valve rear cover 34 are connected sequentially from front to back. The switching valve inlet 311 is located at the bottom of the switching valve housing 31, and the switching valve outlet 312 is located in the middle of the switching valve front cover 33 and communicates with the switching valve housing 35. Inside cylinder 1, a discharge valve seat 36 is installed between the switch valve housing 31 and the switch valve front end cover 33. A discharge through-hole is formed in the middle of the discharge valve seat 36. The rear end of the switch valve core 35 is mounted on the piston 37, and the front end of the switch valve core 35 is inserted into the switch valve housing 31 and located behind the discharge valve seat 36. The piston 37 is installed in the air chamber of the cylinder housing 32. An air valve 38 is installed outside the cylinder housing 32, and its inlet is connected to the air chamber of the cylinder housing 32. The air valve 38 can be connected to an air source (such as an air pump) via an air pipe.

[0033] Preferably, a piston seal ring 39 may be provided between the outer wall of the piston 37 and the inner wall of the air chamber of the cylinder housing 32.

[0034] When the switch valve 3 needs to be opened, the gas entering the front side of the air chamber of the cylinder housing 32 can push the piston 37 backward, and the switch valve core 35 moves backward away from the valve seat discharge through hole of the discharge valve seat 36. At this time, the liquid silicone can flow through the valve seat discharge through hole of the discharge valve seat 36 and be delivered to the injection pipe 6. When the switch valve 3 needs to be closed, the gas entering the rear side of the air chamber of the cylinder housing 32 can push the piston 37 forward, and the front end of the switch valve core 35 can block the valve seat discharge through hole of the discharge valve seat 36.

[0035] like Figure 1 As shown, a pressure gauge 310 can also be installed on the outside of the switch valve housing 31, and the pressure gauge 310 is connected to the inside of the switch valve housing 31. The pressure gauge 310 allows the user to observe the pressure of the liquid silicone flowing through the switch valve.

[0036] It should be noted that the switching valve 3 in this embodiment can also be other pneumatic or electric switching valves, and is not limited to this embodiment.

[0037] In summary, the present invention has a reasonable structural design. A pressure regulating valve is added between the feed mixer and the switching valve. The pressure regulating valve can stably control the pressure of the liquid silicone flowing between the feed mixer and the switching valve, so that the liquid silicone is kept within a certain pressure range, thereby improving the feeding effect of the liquid silicone feeding equipment.

[0038] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A pressure-stabilizing injection mechanism for a liquid silicone feeder, characterized in that: The device includes a feed mixer, a pressure regulating valve, and a switching valve. The feed mixer has a first feed port for feeding A-type adhesive and a second feed port for feeding B-type adhesive. Both the first and second feed ports are connected to the inner cavity of the feed mixer. The mixer outlet of the feed mixer is connected to the pressure regulating valve inlet of the pressure regulating valve through a first connecting pipe. The pressure regulating valve outlet is connected to the switching valve inlet of the switching valve through a second connecting pipe. The switching valve outlet is provided with a filling pipe.

2. The pressure-stabilizing injection mechanism of the liquid silicone feeder according to claim 1, characterized in that: The pressure regulating valve includes a pressure regulating valve housing, a pressure regulating valve front end cover, a pressure regulating valve rear end cover, an inner sleeve, a pressure regulating ball, a pressure regulating sealing ring, a spring retainer, a front spring, a pressure regulating valve push rod, a spring mounting post, a rear spring, and an adjusting nut. The pressure regulating valve front end cover and the pressure regulating valve rear end cover are respectively installed at the front and rear ends of the pressure regulating valve housing. The pressure regulating valve inlet is located at the bottom of the pressure regulating valve housing, and the pressure regulating valve outlet is located at the top of the pressure regulating valve housing. The inner sleeve is installed inside the front end of the pressure regulating valve housing, and the outer wall of the inner sleeve has several feed through holes. The pressure regulating sealing ring is installed at the rear end of the inner sleeve. The spring retainer and the pressure regulating ball are both installed inside the inner sleeve. The body is located between the spring retainer and the pressure-stabilizing sealing ring. The front spring is mounted on the spring retainer, and the rear end of the front spring abuts against one side of the pressure-stabilizing ball. The pressure-stabilizing valve push rod is movably mounted inside the pressure-stabilizing valve housing. The front end of the pressure-stabilizing valve push rod can pass through the central through hole of the pressure-stabilizing sealing ring and contact the other side of the pressure-stabilizing ball. The spring mounting post is mounted on the rear end of the pressure-stabilizing valve push rod, and the rear end spring is mounted outside the spring mounting post. The rear end of the spring mounting post is placed in the rear through hole of the adjusting nut. The outer wall thread of the adjusting nut is threadedly connected to the central threaded hole of the rear end cover of the pressure-stabilizing valve. The rear end of the rear end spring abuts against the inner rear end of the adjusting nut.

3. The pressure-stabilizing injection mechanism of the liquid silicone feeder according to claim 2, characterized in that: A pressure-regulating valve sealing ring is provided between the pressure-regulating valve push rod and the inner wall of the pressure-regulating valve housing.

4. The pressure-stabilizing injection mechanism of the liquid silicone feeder according to claim 2, characterized in that: The adjusting nut is provided with a limiting ring on its outside for engaging with the limiting position of the rear end cover of the pressure regulating valve.

5. The pressure-stabilizing injection mechanism of the liquid silicone feeder according to claim 1, characterized in that: The switching valve includes a switching valve housing, a cylinder housing, a switching valve front cover, a switching valve rear cover, a switching valve core, a discharge valve seat, a piston, and a valve. The switching valve front cover, switching valve housing, cylinder housing, and switching valve rear cover are connected sequentially from front to back. The switching valve inlet is located at the bottom of the switching valve housing, and the switching valve outlet is located in the middle of the switching valve front cover and communicates with the interior of the switching valve housing. The discharge valve seat is installed between the switching valve housing and the switching valve front cover, and a valve seat discharge through hole is passed through the middle of the discharge valve seat. The rear end of the switching valve core is installed on the piston, and the front end of the switching valve core is inserted into the interior of the switching valve housing and located behind the discharge valve seat. The piston is installed in the air chamber of the cylinder housing, and the valve is installed outside the cylinder housing. The air inlet of the valve is connected to the air chamber of the cylinder housing.

6. The pressure-stabilizing injection mechanism of the liquid silicone feeder according to claim 5, characterized in that: A piston sealing ring is provided between the outer wall of the piston and the inner wall of the cylinder housing's air chamber.

7. The pressure-stabilizing injection mechanism of the liquid silicone feeder according to claim 5, characterized in that: A pressure gauge is provided on the outside of the switch valve housing, and the pressure gauge is connected to the inside of the switch valve housing.

8. The pressure-stabilizing injection mechanism of the liquid silicone feeder according to claim 1, characterized in that: The feed mixer is connected to the mounting bracket.

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