Double-component silica gel quantitative feeding machine

Abstract

The utility model relates to the technical field of liquid silica gel injection molding equipment, and discloses a double-component silica gel quantitative feeding machine. Comprising an upper fixing plate; the feeding mechanism comprises a material cylinder barrel and a piston rod arranged in the material cylinder barrel, a flange is arranged at the top end of the material cylinder barrel, the upper end of the flange is connected with a pneumatic opening and closing valve, and a pressure sensor and a glue inlet one-way valve are arranged on two sides of the flange and penetrate through central through holes of the flange respectively; the pneumatic opening and closing valve is communicated and connected with a flow meter; a glue outlet one-way valve is arranged at the top end of the flow meter; wherein the number of the feeding mechanisms is two, and the two feeding mechanisms are symmetrically arranged on the upper fixing plate; and the driving mechanism is arranged below the feeding mechanism and is used for driving the piston rod to move up and down. The quantitative feeding machine for the double-component silica gel can accurately control the gel outlet amount of the double-component silica gel, so that the ratio of 1: 1 is achieved, and the quality of a product formed by liquid silica gel is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid silicone injection molding equipment, in particular to a two-component silicone quantitative feeder. Background Art

[0002] Liquid silicone has excellent tear resistance, resilience, yellowing resistance, thermal stability, heat resistance and aging resistance; it is widely used in the fields of infant products, medical supplies and electronic products. Liquid silicone products can greatly reduce the production process, shorten the product molding cycle, and are cleaner and safer during product molding.

[0003] Two-component liquid silicone is composed of component A (liquid silicone) and component B (silicone curing agent). Liquid silicone injection molding has very high requirements on the mixing ratio of components A and B. If the ratio of components A and B does not reach 1:1, it will affect the quality and production efficiency of the product. In the prior art, the two components are mixed according to the requirements by manual feeding and then added to the liquid silicone injection molding machine, or the two components A and B are delivered to the liquid silicone injection molding machine in a certain ratio by a feeder, and a sensor is installed in the liquid silicone injection molding machine to control the feeding of the feeder.

[0004] The above two methods both have large errors in the feeding ratio of the two-component liquid silicone and fail to meet the requirement of 1:1 for the AB components, thus affecting the quality of the product after molding.

[0005] Therefore, a two-component silica gel quantitative feeder is urgently needed to solve the above problems. Utility Model Content

[0006] Based on the above, the purpose of the utility model is to provide a two-component silicone quantitative feeder to solve the problem that it is difficult to achieve the 1:1 requirement when dispensing two-component liquid silicone, thereby causing the quality of liquid silicone products to be unqualified.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0008] The two-component silica gel quantitative feeder provided by the utility model comprises:

[0009] Upper fixing plate;

[0010] The feeding mechanism comprises a material cylinder and a piston rod arranged in the material cylinder, the top end of the material cylinder is provided with a flange, the upper end of the flange is connected with a pneumatic opening and closing valve, and the central through holes on both sides of the flange that pass through the flange are provided with a pressure sensor and a glue inlet check valve; the pneumatic opening and closing valve is connected with a flow meter, and the top end of the flow meter is provided with a glue outlet check valve; wherein the feeding mechanism is divided into two groups, and the two groups of the feeding mechanism are symmetrically arranged on the upper fixed plate;

[0011] The driving mechanism is installed below the feeding mechanism and is used to drive the piston rod to move up and down.

[0012] As an optional technical solution for a two-component silica gel quantitative feeder, a bracket is provided below the feeding mechanism, and the driving mechanism is installed in the bracket.

[0013] As an optional technical solution for a two-component silicone quantitative feeder, the bracket includes a top plate, support columns and a base. There are four support columns, one end of the four support columns is connected to the four corners of the bottom of the top plate, and the other end of the four support columns is fixed to the base.

[0014] As an optional technical solution for a two-component silicone quantitative feeder, the driving mechanism includes a driving motor, a reducer and a coupling that are rotatably connected in sequence; a fixed middle frame is installed between one end of the reducer close to the coupling and the top plate, and the driving mechanism is fixed in the bracket through the fixed middle frame.

[0015] As an optional technical solution for a two-component silicone quantitative feeder, four guide rods are connected between the upper fixed plate and the top plate, and push plates are sleeved on the four guide rods.

[0016] As an optional technical solution for a two-component silicone quantitative feeder, a screw is connected to one end of the coupling away from the reducer, and the other end of the screw passes through the top plate and is rotatably connected to the push plate.

[0017] As an optional technical solution for a two-component silicone quantitative feeder, a connecting rod is installed on one side of the upper fixed plate and the top plate, and the connecting rod is respectively equipped with a first limit switch, a second limit switch and a third limit switch from top to bottom.

[0018] As an optional technical solution for a two-component silicone quantitative feeder, the outer diameter of the material cylinder is a structure of being larger at the top and smaller at the bottom, and the upper fixing plate is passed through the lower end of the material cylinder.

[0019] As an optional technical solution for a two-component silicone quantitative feeder, screws are provided at the four corners of the flange, and the four screws are threadedly connected to the upper fixed plate. The screws fix the flange and the material cylinder to the upper fixed plate.

[0020] The beneficial effects of the utility model are:

[0021] The two-component silicone quantitative feeder provided by the utility model comprises an upper fixed plate and two groups of feeding mechanisms arranged on the upper fixed plate, including a material cylinder and a piston rod arranged in the material cylinder, a flange is arranged on the top of the material cylinder, a pneumatic opening and closing valve is connected to the upper end of the flange, a pressure sensor and a glue inlet one-way valve are arranged on the central through holes of the flange passing through the two sides of the flange respectively; a flow meter is connected to the pneumatic opening and closing valve, and a glue outlet one-way valve is arranged on the top of the flow meter; a driving mechanism for driving the piston rod to move up and down is arranged below the feeding mechanism.

[0022] First, a driving motor is set to drive the screw to rotate, and the screw drives the push plate to move upward, thereby pushing the two piston rods to move upward synchronously, and the liquid silicone in the two material cylinders is output from the two glue-discharging one-way valves in equal proportions; on the one hand, a flow meter is set on the pneumatic opening and closing valve to accurately control and read the glue output; at the same time, the diameter and stroke of the two material cylinders are the same, and the required stroke of the push plate driven by the driving motor and the screw ensures that the glue output in the two material cylinders is the same; on the other hand, a pressure sensor is set on the flange. When the pressure value in the two material cylinders deviates, the feeding of the material cylinders can be controlled at any time to ensure that the pressure in the two material cylinders is equal, so that the two material cylinders can achieve equal glue output when discharging. Under the above structure, the two-component silicone quantitative feeding machine can accurately control the glue output of the two-component silicone, thereby achieving a 1:1 ratio, ensuring the quality of the liquid silicone product after molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of the two-component silica gel quantitative feeder of the utility model from the first perspective;

[0024] Figure 2 This is a schematic diagram of the overall structure of the two-component silica gel quantitative feeder of the utility model from a second viewing angle;

[0025] Figure 3 This is a schematic diagram of the feeding mechanism in the embodiment of the utility model from the first viewing angle;

[0026] Figure 4 It is a schematic diagram of the feeding mechanism in the embodiment of the utility model under the second viewing angle;

[0027] Figure 5 It is a cross-sectional view of the feeding mechanism in the embodiment of the utility model;

[0028] In the figure:

[0029] 1. Feeding mechanism; 11. Glue discharging one-way valve; 12. Flow meter; 13. Glue inlet one-way valve; 14. Pneumatic opening and closing valve; 15. Pressure sensor; 16. Flange; 17. Cylinder barrel; 18. Piston rod;

[0030] 2. Upper fixed plate; 3. Push plate; 31. Guide rod; 32. Self-lubricating bearing;

[0031] 4. bracket; 41. support column; 42. base; 43. top plate;

[0032] 5. Connecting rod; 51. First limit switch; 52. Second limit switch; 53. Third limit switch;

[0033] 6. Driving mechanism; 61. Driving motor; 62. Reducer; 63. Coupling; 64. Fixed middle frame; 65. Screw. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0035] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] In the description of this embodiment, terms such as "up", "down", "left", and "right" and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present utility model.

[0038] In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more than two. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0039] like Figure 1-5 As shown, the utility model provides a two-component silicone quantitative feeder, which includes: an upper fixed plate 2; a feeding mechanism 1, including a material cylinder 17 and a piston rod 18 arranged in the material cylinder 17, a flange 16 is installed at the top of the material cylinder 17, and a pneumatic opening and closing valve 14 is connected to the upper end of the flange 16, and a pressure sensor 15 and a glue inlet check valve 13 are installed on both sides of the flange 16 through the central through hole of the flange 16; a flow meter 12 is connected to the pneumatic opening and closing valve 14, and a glue outlet check valve 11 is installed on the top of the flow meter 12; wherein, the feeding mechanism 1 is divided into two groups, and the two groups of feeding mechanisms 1 are symmetrically arranged on the upper fixed plate 2; a driving mechanism 6 is installed below the feeding mechanism 1, and is used to drive the piston rod 18 to move up and down.

[0040] The utility model provides a two-component silicone quantitative feeder that drives the screw 65 to rotate by setting a driving motor 61. The screw 65 drives the push plate 3 to move upward, thereby pushing the two piston rods 18 to move upward synchronously, and outputs the liquid silicone in the two material cylinders 17 from the two glue-discharging one-way valves 11 in equal proportions. On the one hand, a flow meter 12 is provided on the pneumatic opening and closing valve 14 to accurately control and read the glue output. At the same time, the diameter and stroke of the two material cylinders 17 are the same. The driving motor 61 and the screw 65 drive the push plate 3 to the required stroke, ensuring that the glue output in the two material cylinders 17 is the same. On the other hand, a pressure sensor 15 is provided on the flange 16. When the pressure values ​​in the two material cylinders 17 deviate, the feeding of the material cylinders 17 can be controlled at any time to ensure that the pressures in the two material cylinders 17 are equal, so that the two material cylinders 17 can achieve equal glue output when discharging. Under the above structure, the two-component silicone quantitative feeding machine can accurately control the output of the two-component silicone, thereby achieving a 1:1 ratio and ensuring the quality of the product after liquid silicone molding.

[0041] Specifically, Figure 3-5As shown, the outer diameter of the material cylinder 17 is a structure that is larger at the top and smaller at the bottom. Due to the setting of this structure, an annular step is formed in the middle of the material cylinder 17, and the upper fixing plate 2 is penetrated at the lower end of the material cylinder 17, and its annular step is abutted against the upper fixing plate 2. Then, through holes are opened at the four corners of the flange 16, and a long screw is penetrated in each through hole. The long screw is threadedly connected to the upper fixing plate 2. At this time, one end of the flange 16 is embedded in the upper end of the material cylinder 17 and is conductively connected to the material cylinder 17. At the same time, the two material cylinders 17 are symmetrically fixed on the upper fixing plate 2 with their upper and lower ends flush; in addition, as shown Figure 5 As shown, an arc-shaped annular groove is opened on the outer diameter of the axial hole at one end of the flange 16, and an elastic sealing ring is arranged in the arc-shaped annular groove. When the flange 16 and the material cylinder barrel 17 are sleeved and connected, the outer wall of the elastic sealing ring is abutted and pressed against the inner wall of the axial hole of the material cylinder barrel 17, and the elastic sealing ring is squeezed and deformed to form a sealing wall, so that a good sealing space is maintained between the flange 16 and the inner hole of the material cylinder barrel 17, thereby ensuring that the silicone will not overflow from the connection between the flange 16 and the material cylinder barrel 17.

[0042] In this embodiment, if Figure 4 and Figure 5 As shown, the glue inlet check valve 13 is installed on the side of the flange 16 and is connected to the axial hole of the flange 16. The axial hole on the front end side of the flange 16 that penetrates the flange 16 is connected with a pressure sensor 15. The two-component liquid silicone is respectively input into the two material cylinders 17 from the two glue inlet check valves 13 on the left and right sides of the feeding mechanism 1. When the pressure of the liquid silicone in the material cylinder 17 reaches the set value, the pressure sensor 15 transmits a signal to the background control system and stops feeding. When the pressure values ​​in the two material cylinders 17 differ, the pressure sensor 15 transmits a signal to the background and controls the feeding in the material cylinder 17 to adjust the pressure of the two material cylinders 17 so that the pressures in the two material cylinders 17 are the same; the pneumatic on-off valve 14 is installed at the top of the flange 16. When the material cylinder When the cylinder 17 needs to be fed, the pneumatic opening and closing valve 14 is in a closed state. When the liquid silicone in the cylinder 17 needs to be output from the glue discharging one-way valve 11, the pneumatic opening and closing valve 14 is opened, and the liquid silicone in the cylinder 17 passes through the flange 16, the pneumatic opening and closing valve 14 and the flow meter 12 in sequence, and is finally output from the glue discharging one-way valve 11. Since the pneumatic opening and closing valve 14 is driven to open and close by compressed air, compared with other methods, the pneumatic opening and closing valve 14 has a faster opening and closing of its silicone delivery channel, so that the output amount of the two-component liquid silicone is more accurate. In addition, the setting of the pressure sensor 15 can adjust the pressure in the two cylinders 17 at any time, always maintain the pressure of the liquid silicone in the two cylinders 17, and improve the accuracy of the liquid silicone output ratio.

[0043] In this embodiment, if Figure 1 and Figure 2As shown, a bracket 4 is provided below the upper fixed plate 2, and the bracket 4 includes a top plate 43, a support column 41 and a base 42. The top plate 43 and the base 42 are connected and fixed by four support columns 41, and the four support columns 41 are arranged at the four corners of the top plate 43; the upper fixed plate 2 and the top plate 43 are connected and fixed by four guide rods 31, and the two ends of the four guide rods 31 are respectively fixedly connected to the four corners of the upper fixed plate 2 and the top plate 43, and a push plate 3 is sleeved on the four guide rods 31, and the bottom ends of the piston rods 18 in the two material cylinders 17 are respectively fixedly connected to the push plate 3; a self-lubricating bearing 32 is provided at the four corners of the push plate 3, and the push plate 3 is sleeved on the corresponding four guide rods 31 through four self-lubricating bearings 32 to move up and down. The arrangement of the guide rods 31 can not only provide a guiding effect for the push plate 3, but also can firmly install the feeding mechanism 1 and the bracket 4.

[0044] Specifically, a fixed middle frame 64 is installed on the lower end surface of the top plate 43, and a reducer 62 is connected to the lower end of the fixed middle frame 64. A driving motor 61 for driving the reducer 62 to rotate is installed at the lower end of the reducer 62. The driving motor 61 is preferably a servo motor. The upper end of the reducer 62, that is, its output end is connected to a coupling 63. The other end of the coupling 63 is installed with a screw rod 65. One end of the screw rod 65 passes through the top plate 43 and is rotatably connected to the push plate 3. That is to say, a ball nut is installed on the push plate 3, and the screw rod 65 passes through the ball nut. When the servo motor drives the reducer 62 in turn, 2 and the coupling 63 and drive the screw 65 to rotate, the screw 65 can drive the push plate 3 to move up and down, thereby pushing the two piston rods 18 to move up and down synchronously in the two material cylinders 17; this structure can push the silicone in the two material cylinders 17 synchronously. On the one hand, when the two piston rods 18 move upward to push the material synchronously, the two material cylinders 17 reach the same discharge volume. On the other hand, when the two piston rods 18 move downward synchronously, the space in the two material cylinders 17 can be kept consistent. Therefore, this structure further improves the proportional accuracy of the two-component liquid silicone when discharging.

[0045] In this embodiment, if Figure 1 and Figure 2As shown, a connecting rod 5 is installed on one side between the upper fixed plate 2 and the top plate 43, and a first limit switch 51, a second limit switch 52 and a third limit switch 53 are arranged on the connecting rod 5 from top to bottom. The first limit switch 51 is used to sense the highest position of the push plate 3 when it moves upward; the second limit switch 52 is installed at the initial position of the push plate 3, and when the push plate 3 moves downward after the silicone in the cylinder 17 is transported, the second limit switch 52 is used to sense the reset of the push plate 3, thereby ensuring that the push plate 3 moves to the initial position; the third limit switch 53 is installed at the bottom of the initial position of the push plate 3, and is used to sense the lowest position when the push plate 3 moves downward; when the servo motor is controlled to drive the push plate 3 to push the piston rod 18 up and down by setting the three limit switches, the components will not be damaged due to excessive up and down movement of the push plate 3.

[0046] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model is disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiments according to the technology of the utility model, which does not depart from the content of the technical solution of the utility model, belongs to the scope of the technical solution of the utility model.

Claims

1. A two-component silica gel quantitative feeder, characterized in that: include: Upper fixing plate; The feeding mechanism comprises a material cylinder and a piston rod arranged in the material cylinder, the top end of the material cylinder is provided with a flange, the upper end of the flange is connected with a pneumatic opening and closing valve, and the central through holes on both sides of the flange that pass through the flange are provided with a pressure sensor and a glue inlet check valve; the pneumatic opening and closing valve is connected with a flow meter, and the top end of the flow meter is provided with a glue outlet check valve; wherein the feeding mechanism is divided into two groups, and the two groups of the feeding mechanism are symmetrically arranged on the upper fixed plate; The driving mechanism is installed below the feeding mechanism and is used to drive the piston rod to move up and down.

2. A two-component silica gel quantitative feeder according to claim 1, characterized in that: A bracket is arranged below the feeding mechanism, and the driving mechanism is installed in the bracket.

3. A two-component silica gel quantitative feeder according to claim 2, characterized in that: The bracket includes a top plate, support columns and a base. There are four support columns, one end of each of which is connected to the four corners of the bottom of the top plate, and the other end of each of which is fixed to the base.

4. A two-component silica gel quantitative feeder according to claim 3, characterized in that: The driving mechanism includes a driving motor, a reducer and a coupling which are rotatably connected in sequence; a fixed middle frame is installed between one end of the reducer close to the coupling and the top plate, and the driving mechanism is fixed in the bracket through the fixed middle frame.

5. A two-component silica gel quantitative feeder according to claim 4, characterized in that: Four guide rods are connected between the upper fixing plate and the top plate, and push plates are sleeved on the four guide rods.

6. A two-component silica gel quantitative feeder according to claim 5, characterized in that: A screw rod is connected to one end of the coupling away from the reducer, and the other end of the screw rod passes through the top plate and is rotatably connected to the push plate.

7. A two-component silica gel quantitative feeder according to claim 6, characterized in that: A connecting rod is installed on one side of the upper fixing plate and the top plate, and the connecting rod is respectively equipped with a first limit switch, a second limit switch and a third limit switch from top to bottom.

8. A two-component silica gel quantitative feeder according to claim 1, characterized in that: The outer diameter of the material cylinder is a structure that is larger at the top and smaller at the bottom, and the upper fixing plate is passed through the lower end of the material cylinder.

9. A two-component silica gel quantitative feeder according to claim 8, characterized in that: Screws are provided at the four corners of the flange, and the four screws are threadedly connected to the upper fixing plate. The screws fix the flange and the cylinder barrel to the upper fixing plate.

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