A raw material mixing device for high-elasticity liquid silicone foam production

Abstract

The utility model discloses a kind of raw material mixing devices for high-elasticity liquid silicone foam production, it is related to liquid silicone foam raw material mixing technical field, including mixing tank, the top of the mixing tank is fixedly installed with tank cover, stirring mechanism is provided on the tank cover, the top of the tank cover is fixedly connected with support;The stirring mechanism includes the stirring shaft rotatably arranged on the tank cover by bearing, the bottom end of the stirring shaft extends to the mixing tank, a plurality of evenly distributed stirring rods are hingedly installed on the stirring shaft, slidingly arranged with moving rod in the stirring shaft.The utility model realizes the compound motion of stirring shaft rotation and stirring rod swing by driving motor synchronously, reduces motor and transmission component, reduces failure risk and power consumption;Composite motion enhances material radial dispersion and axial flow, forms three-dimensional mixing effect, solves high-viscosity silicone mixing problem, eliminates dead angle, realizes efficient mixing.

Description

Technical Field

[0001] This utility model relates to the field of liquid silicone foam raw material mixing technology, and in particular to a raw material mixing device for the production of high-elasticity liquid silicone foam. Background Technology

[0002] High-elasticity liquid silicone foam is a porous elastic material made by mixing and vulcanizing liquid silicone as the main base material, with the addition of foaming agents, crosslinking agents, and other additives. It possesses excellent resilience, weather resistance, and environmental safety, and is widely used in medical, electronics, and food packaging fields. During the production process, raw material mixing is the core step determining product performance: the uniform fusion of liquid silicone and additives directly affects the density distribution, bubble structure, and mechanical properties of the foam. Uneven mixing will lead to localized hardening, loss of elasticity, or substandard physical properties. Therefore, efficient and uniform mixing is crucial to ensuring product quality.

[0003] Among existing mixing devices, such as the one disclosed in document CN212826197U, which describes a raw material mixing device for the production and processing of liquid silicone foam, although the device improves mixing efficiency through the synergistic design of a rotary mixing vessel and a dispersing stirring cylinder, it still has significant drawbacks:

[0004] 1. Structural complexity and high failure risk: It requires an independent motor to drive the mixing tank to rotate and multiple dispersing and stirring tanks. The dispersing tank is also equipped with a rotary motor. The coordinated operation of multiple motors is prone to mechanical failure, resulting in high maintenance costs and high power consumption of multiple motors, which does not conform to the trend of green manufacturing.

[0005] 2. Although the dispersing and stirring drum promotes material circulation, the high-viscosity silica gel does not flow sufficiently at the edge of the tank, resulting in batch uniformity deviations. Utility Model Content

[0006] The purpose of this invention is to solve the problems existing in the prior art by proposing a raw material mixing device for the production of highly elastic liquid silicone foam.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A raw material mixing device for producing high-elasticity liquid silicone foam includes a mixing tank, a tank cover fixedly installed on the top of the mixing tank, a stirring mechanism provided on the tank cover, and a bracket fixedly connected to the top of the tank cover.

[0009] The stirring mechanism includes a stirring shaft rotatably mounted on the tank cover via bearings, the bottom end of the stirring shaft extending into the mixing tank, a plurality of evenly distributed stirring rods hinged on the stirring shaft, a movable rod slidably disposed inside the stirring shaft, and connecting rods hinged between the movable rod and the plurality of stirring rods respectively.

[0010] A drive motor is fixedly installed on the bracket, and a transmission assembly connected to the drive motor, the stirring shaft, and the moving rod is provided on the inner side of the bracket. The drive motor realizes the synchronous rotation of the stirring shaft and the vertical movement of the moving rod through the transmission assembly.

[0011] Preferably, the tank lid is provided with a plurality of feed pipes, the number of which is at least two, and the bottom of the mixing tank is provided with a discharge pipe.

[0012] Preferably, the transmission assembly includes a rotating shaft and a worm gear rotatably mounted inside the support via bearings. The output shaft of the drive motor is fixedly connected to one end of the worm gear. A worm wheel that meshes with the worm gear is fixedly sleeved on the rotating shaft. A gear ring is fixedly sleeved on the stirring shaft. A gear that meshes with the gear ring is fixedly sleeved on the rotating shaft.

[0013] Preferably, a ring is fixedly connected to the top end of the moving rod, a retainer is fixedly connected to the ring, a rolling ball is embedded in the retainer, and a spring sleeved on the outside of the moving rod is fixedly installed between the bottom of the ring and the top end of the stirring shaft.

[0014] Preferably, the retainer includes an upper retainer and a lower retainer, the ball bearing is embedded between the upper retainer and the lower retainer, the ball bearing can roll between the upper retainer and the lower retainer, and the upper retainer and the lower retainer are locked onto the ring by screws.

[0015] Preferably, the top end of the rotating shaft extends above the bracket and is fixedly fitted with a rotating wheel, the outer ring of the rotating wheel is fixedly fitted with a shaped ring, and the ball contacts the lower surface of the shaped ring.

[0016] Preferably, the stirring shaft has a guide groove inside, and a guide block is slidably disposed inside the guide groove. The guide block extends to one side outside the guide groove and is fixedly connected to the outer wall of the moving rod.

[0017] Preferably, the mixing tank is provided with a scraper that fits against the inner wall of the mixing tank, and a support rod is fixedly connected between the scraper and the stirring shaft.

[0018] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0019] 1. In this application, the rotation of the stirring shaft and the swing of the stirring rod are realized synchronously by the drive motor and mechanical linkage, which reduces the number of motors and transmission components. Compared with the prior art, it avoids the risk of multi-motor collaborative failure, reduces power consumption, and conforms to the trend of green manufacturing.

[0020] 2. In this application, the stirring shaft is rotated by the drive motor, which in turn drives the stirring rod to rotate while the stirring rod oscillates. This ensures that the material is radially dispersed, and the up-and-down oscillation enhances the axial flow, forming a three-dimensional mixing effect. The combined motion solves the problem of mixing high-viscosity silica gel raw materials. The oscillation of the stirring rod breaks up molecular agglomeration, and the rotation covers the entire area of ​​the tank, eliminating dead corners and achieving efficient mixing. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of a raw material mixing device for the production of highly elastic liquid silicone foam proposed in this utility model;

[0022] Figure 2 This is a partial cross-sectional view of the mixing tank of a raw material mixing device for producing high-elasticity liquid silicone foam according to the present invention.

[0023] Figure 3 This is a partial cross-sectional view of a raw material mixing device for the production of highly elastic liquid silicone foam proposed in this utility model.

[0024] Figure 4 This utility model proposes a raw material mixing device for the production of highly elastic liquid silicone foam. Figure 3 Enlarged view of point A in the middle;

[0025] Figure 5 This is a partial structural diagram of a raw material mixing device for producing high-elasticity liquid silicone foam according to the present invention;

[0026] Figure 6 This is an exploded view of the retainer of a raw material mixing device for the production of highly elastic liquid silicone foam proposed in this utility model;

[0027] Figure 7 This is a schematic diagram of the irregular ring structure of a raw material mixing device for the production of highly elastic liquid silicone foam proposed in this utility model.

[0028] Legend: 100, Mixing tank; 200, Tank lid; 300, Support; 400, Stirring mechanism; 401, Stirring shaft; 402, Stirring rod; 403, Moving rod; 404, Connecting rod; 405, Ring; 406, Cage; 4061, Upper frame; 4062, Lower frame; 407, Ball bearing; 408, Spring; 409, Rotating wheel; 410, Irregular ring; 411, Guide groove; 412, Guide block; 500, Drive motor; 600, Transmission assembly; 601, Rotating shaft; 602, Worm gear; 603, Worm wheel; 604, Gear ring; 605, Gear; 700, Scraper; 701, Support rod. Detailed Implementation

[0029] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0031] like Figure 1-7 As shown, this utility model provides a raw material mixing device for the production of high elasticity liquid silicone foam, including a mixing tank 100, a tank cover 200 fixedly installed on the top of the mixing tank 100, a stirring mechanism 400 provided on the tank cover 200, and a bracket 300 fixedly connected to the top of the tank cover 200.

[0032] The stirring mechanism 400 includes a stirring shaft 401 rotatably mounted on the tank cover 200 via bearings. The bottom end of the stirring shaft 401 extends into the mixing tank 100. Several evenly distributed stirring rods 402 are hingedly mounted on the stirring shaft 401. A movable rod 403 is slidably mounted inside the stirring shaft 401. Connecting rods 404 are hingedly mounted between the movable rod 403 and the several stirring rods 402.

[0033] A drive motor 500 is fixedly installed on the bracket 300. A transmission assembly 600 is provided inside the bracket 300, which is connected to the drive motor 500, the stirring shaft 401 and the moving rod 403. The drive motor 500 realizes the synchronous rotation of the stirring shaft 401 and the vertical movement of the moving rod 403 through the transmission assembly 600.

[0034] In this embodiment, a plurality of feed pipes are connected to the tank lid 200, and the number of feed pipes is at least two. A discharge pipe is provided at the bottom of the mixing tank 100.

[0035] Specifically, at least two feed pipes are independently connected to different raw materials, and the separate feed prevents the highly active additives from coming into contact with the raw materials in advance, thus ensuring the controllability of the reaction; the discharge pipe is located at the bottom center of the mixing tank 100, and the material is discharged quickly by gravity.

[0036] In this embodiment, the transmission assembly 600 includes a rotating shaft 601 and a worm gear 602 rotatably disposed inside the bracket 300 via bearings. The output shaft of the drive motor 500 is fixedly connected to one end of the worm gear 602. A worm wheel 603 that meshes with the worm gear 602 is fixedly sleeved on the rotating shaft 601. A gear ring 604 is fixedly sleeved on the stirring shaft 401. A gear 605 that meshes with the gear ring 604 is fixedly sleeved on the rotating shaft 601.

[0037] Specifically, the drive motor 500 drives the worm 602 to rotate, which in turn drives the worm wheel 603, which in turn drives the rotating shaft 601 to rotate. The worm wheel 603 and the worm 602 provide high torque and low speed output to avoid overload. The rotating shaft 601 can drive the gear 605, and the gear 605 and the gear ring 604 work together to drive the stirring shaft 401 to rotate and achieve stirring and mixing.

[0038] In this embodiment, a ring 405 is fixedly connected to the top end of the moving rod 403, a retainer 406 is fixedly connected to the ring 405, a rolling ball 407 is embedded in the retainer 406, and a spring 408 sleeved on the outside of the moving rod 403 is fixedly installed between the bottom of the ring 405 and the top end of the stirring shaft 401; the top end of the rotating shaft 601 extends to the top of the bracket 300 and is fixedly sleeved with a rotating wheel 409, and a shaped ring 410 is fixedly sleeved on the outer ring of the rotating wheel 409, and the ball 407 contacts the lower surface of the shaped ring 410;

[0039] Specifically, when the rotating shaft 601 rotates, it drives the rotating wheel 409 to rotate. The irregular ring 410 on the outer ring of the rotating shaft 601 rotates and contacts the ball 407. As the irregular ring 410 rotates, its different positions alternately contact the ball 407, which can push the ball 407 to realize the up and down movement of the moving rod 403. The spring 408 is compressed when the moving rod 403 moves down and released when it moves up to assist in the reset, ensuring the continuity of the movement.

[0040] In this embodiment, the retainer 406 includes an upper retainer 4061 and a lower retainer 4062, and a ball bearing 407 is embedded between the upper retainer 4061 and the lower retainer 4062. The ball bearing 407 can roll between the upper retainer 4061 and the lower retainer 4062. The upper retainer 4061 and the lower retainer 4062 are locked onto the ring 405 by screws.

[0041] Specifically, the upper frame 4061 and the lower frame 4062 are locked together with screws to ensure that the ball 407 only rolls without shifting.

[0042] In this embodiment, a guide groove 411 is provided inside the stirring shaft 401, and a guide block 412 is slidably provided inside the guide groove 411. The guide block 412 extends to one side outside the guide groove 411 and is fixedly connected to the outer wall of the moving rod 403.

[0043] Specifically, when the moving rod 403 moves up and down, it can drive the guide block 412 to slide along the guide groove 411, thereby limiting the moving rod 403 and keeping the moving rod 403 moving in a straight line up and down.

[0044] In this embodiment, a scraper 700 that fits against the inner wall of the mixing tank 100 is provided inside the mixing tank 100, and a support rod 701 is fixedly connected between the scraper 700 and the stirring shaft 401.

[0045] Specifically, the scraper 700 is fixed to the stirring shaft 401 by the support rod 701. When the stirring shaft 401 rotates, it can drive the support rod 701 to rotate the scraper 700. While the scraper 700 plays the role of stirring and mixing, it can also contact the inner wall of the mixing tank 100 to clean it, prevent it from sticking to the wall, and return it to the mixing area.

[0046] How to use and how to work this device:

[0047] In use, at least two feed pipes are independently connected to different raw materials. The drive motor 500 drives the worm gear 602 to rotate. The worm gear 602, in conjunction with the worm wheel 603, causes the rotating shaft 601 to rotate. The rotation of the rotating shaft 601 is driven by two paths:

[0048] 1. The rotating shaft 601 drives the gear 605 to rotate, and the gear 605 drives the stirring shaft 401 to rotate through the cooperation with the gear ring 604. The mixing station drives the stirring rod 402 to perform circumferential mixing of the material.

[0049] 2. The rotation of the rotating shaft 601 also drives the rotating wheel 409 at its top to rotate, which in turn drives the irregular ring 410 to rotate. When the irregular ring 410 rotates with the rotating shaft 601, its eccentric contour periodically contacts the ball 407. The irregular ring 410 pushes the ball 407 and drives the ring 405 to drive the moving rod 403 to move vertically. The moving rod 403 is connected to the stirring rod 402 through the hinged connecting rod 404. When the moving rod 403 moves down, the connecting rod 404 pushes the stirring rod 402 to swing its distal end upward. When the moving rod 403 moves up, the stirring rod 402 is assisted to reset by the gravity of the stirring rod 402 and the elastic force released by the spring 408. The stirring rod 402 swings down to reset.

[0050] The drive motor 500 rotates the stirring shaft 401, which in turn drives the stirring rod 402 to rotate. At the same time, the stirring rod 402 oscillates, ensuring radial dispersion of materials. The up-and-down oscillation enhances axial flow, forming a three-dimensional mixing effect. This compound motion solves the problem of mixing high-viscosity silica raw materials. The oscillation of the stirring rod 402 breaks up molecular agglomeration, and the rotation covers the entire area of ​​the tank, eliminating dead corners and achieving efficient mixing.

[0051] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A raw material mixing device for producing high-elasticity liquid silicone foam, comprising a mixing tank (100), wherein a tank cover (200) is fixedly installed on the top of the mixing tank (100), and a stirring mechanism (400) is provided on the tank cover (200), characterized in that: A bracket (300) is fixedly connected to the top of the can lid (200); The stirring mechanism (400) includes a stirring shaft (401) rotatably mounted on the tank cover (200) via bearings. The bottom end of the stirring shaft (401) extends into the mixing tank (100). A plurality of evenly distributed stirring rods (402) are hinged on the stirring shaft (401). A movable rod (403) is slidably mounted inside the stirring shaft (401). A connecting rod (404) is hinged between the movable rod (403) and the plurality of stirring rods (402). A drive motor (500) is fixedly installed on the bracket (300). A transmission assembly (600) is provided inside the bracket (300) and connected to the drive motor (500), the stirring shaft (401) and the moving rod (403). The drive motor (500) realizes the synchronous rotation of the stirring shaft (401) and the vertical movement of the moving rod (403) through the transmission assembly (600).

2. The raw material mixing device for producing high-elasticity liquid silicone foam according to claim 1, characterized in that: The can lid (200) is provided with several feed pipes, the number of which is at least two, and the bottom of the mixing tank (100) is provided with a discharge pipe.

3. The raw material mixing device for producing high-elasticity liquid silicone foam according to claim 1, characterized in that: The transmission assembly (600) includes a rotating shaft (601) and a worm gear (602) rotatably mounted inside the bracket (300) via bearings. The output shaft of the drive motor (500) is fixedly connected to one end of the worm gear (602). A worm wheel (603) meshing with the worm gear (602) is fixedly sleeved on the rotating shaft (601). A gear ring (604) is fixedly sleeved on the stirring shaft (401). A gear (605) meshing with the gear ring (604) is fixedly sleeved on the rotating shaft (601).

4. The raw material mixing device for producing high-elasticity liquid silicone foam according to claim 3, characterized in that: A ring (405) is fixedly connected to the top end of the moving rod (403), a retainer (406) is fixedly connected to the ring (405), a rolling ball (407) is embedded in the retainer (406), and a spring (408) sleeved on the outside of the moving rod (403) is fixedly installed between the bottom of the ring (405) and the top end of the stirring shaft (401).

5. The raw material mixing device for producing high-elasticity liquid silicone foam according to claim 4, characterized in that: The retainer (406) includes an upper retainer (4061) and a lower retainer (4062), and the ball bearing (407) is embedded between the upper retainer (4061) and the lower retainer (4062). The ball bearing (407) can roll between the upper retainer (4061) and the lower retainer (4062). The upper retainer (4061) and the lower retainer (4062) are locked onto the ring (405) by screws.

6. The raw material mixing device for producing high-elasticity liquid silicone foam according to claim 4, characterized in that: The top of the rotating shaft (601) extends above the bracket (300) and is fixedly fitted with a rotating wheel (409). The outer ring of the rotating wheel (409) is fixedly fitted with a shaped ring (410), and the ball (407) contacts the lower surface of the shaped ring (410).

7. The raw material mixing device for producing high-elasticity liquid silicone foam according to claim 1, characterized in that: The stirring shaft (401) has a guide groove (411) inside, and a guide block (412) is slidably provided inside the guide groove (411). The guide block (412) extends to one side outside the guide groove (411) and is fixedly connected to the outer wall of the moving rod (403).

8. The raw material mixing device for producing high-elasticity liquid silicone foam according to claim 1, characterized in that: The mixing tank (100) is provided with a scraper (700) that fits against the inner wall of the mixing tank (100), and a support rod (701) is fixedly connected between the scraper (700) and the stirring shaft (401).

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