Upper-inlet and lower-outlet type SMC (Sheet Molding Compound) paste mixing device

Abstract

The utility model discloses an upper-inlet and lower-outlet type SMC (Sheet Molding Compound) material paste mixing device which is characterized in that a material receiving opening is formed in the top of a stirring barrel, and a vertical stirring device capable of vertically moving is arranged above the material receiving opening; after being connected with a vertical driving device, the vertical stirring device can move inside and outside the stirring barrel and can controllably stir materials in the stirring barrel; a premixing bin and a receiving bin are arranged on the premixing device, a plurality of feeding ports are formed in the receiving bin in a high-low mode, and a preliminary stirring device is arranged between the feeding ports formed in the high-low mode. In the stirring process of various paste materials with different densities, color paste and magnesium oxide paste are primarily stirred through the primary stirring device, the stirring speed of the paste and the magnesium oxide paste is reduced, the paste and other materials are stirred again after primary stirring, the material proportion can be well controlled, and the performance uniformity of subsequent pressed products is improved; and the flow control device at the bottom of the stirring barrel can accurately control the downward flowing speed of the materials and stably improve the stirring effect of the paste.

Description

Technical Field

[0001] The utility model relates to the field of composite materials, in particular to a top-in and bottom-out type SMC material paste mixing device. Background Art

[0002] In the production process of SMC sheets, the current production method is: the resin paste, magnesium oxide paste, color paste, etc. in the reactor are transported to the mixer through a delivery pump, and the three materials are evenly mixed in the mixer to form a mixed paste. The mixed paste flows naturally through the flow channel to the distribution channel, and then enters the distribution trough, and finally the subsequent laying work is carried out.

[0003] SMC material paste mixers currently have two types, namely top-in and bottom-out type and bottom-in and top-out type. Compared with the bottom-in and top-out type, the top-in and bottom-out type mixer is easier to discharge the resin paste in the mixer thoroughly without wasting the resin paste. At the same time, since the discharge ports of the three pastes are located at the top, after the production is completed, there will be no material backflow phenomenon, which can avoid the involvement of material impurities. However, the top-in and bottom-out type mixer also has many problems, which are reflected in:

[0004] 1. Due to the effect of gravity, the resin paste flows quickly after stirring. Since there is no premixing system, the mixing effect is affected.

[0005] 2. The density of the three pastes is different. During the stirring process, due to the effect of gravity, the color paste and magnesium oxide paste fall quickly, causing local unevenness and unable to guarantee the material ratio, which will affect the uniformity of the performance of the subsequent pressed products.

[0006] 3. The discharge port adopts a single channel, and the flow of the three pastes is not easy to control. When the flow of the paste is too large, in order to prevent overflow, the flow rate of the mixed paste is usually accelerated by increasing the stirring paddle speed, but this method will affect the stirring effect of the mixed paste. Utility Model Content

[0007] In order to overcome the deficiencies of the prior art, the utility model provides a top-in-bottom-out SMC paste mixing device, which adopts a top-in-bottom-out feeding and mixing method and multi-point feeding to solve various technical problems in the prior art.

[0008] In order to achieve the above technical purpose, the utility model adopts the following scheme:

[0009] A top-in and bottom-out SMC material paste mixing device comprises a stirring barrel, a vertical stirring device, a premixing device and a flow control device installed at the bottom of the stirring barrel; the top of the stirring barrel is a receiving port, a vertical stirring device that can move vertically is arranged above the receiving port, a vertical driving device is arranged on the vertical stirring device, and the vertical driving device can drive the vertical stirring device to move inside and outside the stirring barrel and stir the material inside the stirring barrel; a premixing bin is arranged on the premixing device, a mixing driving device and a mixing discharge port are arranged in the premixing bin, a receiving bin is arranged on the upper part of the premixing bin, a plurality of feeding ports are arranged at different heights on the receiving bin, and a preliminary stirring device is arranged between the feeding ports arranged at different heights.

[0010] The mixing barrel is designed as a multi-section structure, including an upper mixing barrel and a lower booster barrel. Snap-on connectors are provided between the multi-section structures. A flow control device is provided on the lower booster barrel. Dividing the mixing barrel into multiple sections can facilitate assembly and disassembly and facilitate internal cleaning.

[0011] The preliminary stirring device comprises a grid stirrer, which is a plate-shaped grid or a cylindrical grid, and its end is fixed on the side wall of the receiving bin and extends to the outside to be connected with the grid drive motor.

[0012] An auxiliary feeding port is arranged inside the receiving bin, and the auxiliary feeding port is used to supply a regulator or auxiliary feeding into the interior.

[0013] The premix bin is tapered, and its lower cross section gradually decreases, which is beneficial to the concentrated flow and discharge of materials.

[0014] The vertical stirring device is fixed on a vertical support plate, a guide device is arranged on the vertical support plate, a machine fixing plate is arranged on the guide device, a stirring drive motor is arranged on the machine fixing plate, a driving shaft extends from the bottom of the stirring drive motor, and a stirring blade is arranged on the driving shaft.

[0015] A driving cylinder support plate is arranged on the top of the vertical support plate, and a vertical driving cylinder is arranged on the driving cylinder support plate. The driving end of the vertical driving cylinder is connected to the machine fixing plate to realize vertical driving.

[0016] Compared with the prior art, the utility model has the following beneficial effects: the utility model is provided with a receiving port on the top of the mixing barrel, and a vertical stirring device that can move vertically is provided above the receiving port. After the vertical stirring device is connected with the vertical driving device, it can move inside and outside the mixing barrel and realize controllable stirring of the material inside the mixing barrel; a premixing bin is provided on the premixing bin, and a receiving bin is provided on the upper part of the premixing bin. A plurality of feeding ports are provided at high and low levels on the receiving bin, and a preliminary stirring device is provided between the feeding ports provided at high and low levels. The utility model designs a premixing system, and the mixing effect of the material can be improved after multiple stirring. In the process of stirring a variety of pastes with different densities, the color paste and magnesium oxide paste are initially stirred by the preliminary stirring device, and the stirring rate is reduced. After the preliminary stirring, they are stirred again with the remaining materials, which can well control the material ratio and improve the uniformity of the performance of the subsequent pressed products. The flow control device at the bottom of the mixing barrel can accurately control the downward flow rate of the material and stably improve the stirring effect of the paste. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0018] Figure 2 This is a rear view structural diagram of the utility model;

[0019] Figure 3 This is a side view of the structure of the utility model;

[0020] Figure 4 for Figure 2 A schematic diagram of the enlarged structure of the middle A area;

[0021] Figure 5 This is a schematic diagram of the three-dimensional structure of the preliminary stirring device;

[0022] In the accompanying drawings, 1. vertical support plate, 11. vertical guide rail, 12. vertical guide groove, 13. upper support seat, 14. lower support seat, 2. vertical drive cylinder, 21. drive cylinder support plate, 22. reinforcement plate, 3. machine fixing plate, 31. slider, 4. stirring drive motor, 41. drive shaft, 42. stirring blade, 5. receiving port, 6. upper stirring barrel, 61. clamp, 62. lower booster barrel, 63. flow control valve, 64. discharge pipe, 7. premix bin, 71. mixing support plate, 72. mixing drive motor, 73. mixing discharge port, 8. receiving bin, 81. upper feed port, 82. lower feed port, 83. auxiliary feed port, 9. grille agitator, 91. drive shaft, 92. grille drive motor. DETAILED DESCRIPTION

[0023] The utility model is described in detail below through specific embodiments. People who are familiar with this technology can easily understand other advantages and functions of the utility model from the content disclosed in this specification; however, it should be pointed out that the following specific implementation methods do not technically limit the technical solution. Under the guidance of the following technical solution, those skilled in the art can also make further technical extensions. The scope of protection of this patent application shall be subject to the claims.

[0024] Embodiment 1: The utility model discloses a top-in and bottom-out SMC paste mixing device, as shown in the attached drawings, which comprises a mixing barrel, a vertical mixing device, a premixing device and a flow control valve 63 installed at the bottom of the mixing barrel;

[0025] Among the above components, the mixing barrel is designed as a multi-stage structure, which includes an upper mixing barrel 6 and a lower booster barrel 62, and the lower booster barrel 62 is set as a tapered structure. A clamp 61 is set between the upper mixing barrel 6 and the lower booster barrel 62 as a snap-on connector, and the flow control valve 63 is set on the lower booster barrel 62. Through this segmented and quick-detachable structural setting, the mixing barrel is divided into multiple sections, which is convenient for assembly and disassembly, and more convenient for internal cleaning.

[0026] The top of the upper mixing barrel 6 is a receiving port 5, and a vertically movable vertical stirring device is arranged above the receiving port 5. The vertical stirring device includes a machine fixing plate 3, and a stirring drive motor 4 connected to the frequency converter system is arranged on the machine fixing plate 3. After the driving end of the stirring drive motor 4 passes through the machine fixing plate 3, a driving shaft 41 is extended through the bottom of the stirring drive motor, and a stirring blade 42 is arranged on the driving shaft 41. In order to realize the vertical drive of the driving shaft 41 and the stirring blade 42, the utility model is provided with a vertical support plate 1, and vertical guide rails 11 are arranged on the left and right sides of the vertical support plate 1, and vertical guide grooves 12 are also arranged on the vertical guide rails 11. The machine fixing plate 3 is provided with a slider 31 to cooperate with the vertical guide rails 11 and the vertical guide grooves 12, thereby realizing front and back and left and right constraints, and controlling the machine fixing plate 3 to only realize vertical smooth sliding.

[0027] A driving cylinder support plate 21 is arranged on the top of the vertical support plate 1, and a vertical driving cylinder 2 is arranged on the driving cylinder support plate 21. The driving end of the vertical driving cylinder 2 is connected to the machine fixing plate 3 and realizes the vertical driving of the machine fixing plate 3. This structure can realize the vertical movement of the entire vertical stirring device, thereby realizing whether the material inside the upper stirring barrel 6 is stirred or not.

[0028] The utility model is provided with a premixing device at the upper part of the receiving port 5, and the premixing device comprises a premixing bin 7, and the premixing bin 7 is horizontally supported by a mixing support plate 71, and a mixing drive motor 72 is provided in the premixing bin 7 as a mixing drive device, and the mixing drive motor 72 drives the auger inside the premixing bin 7 to discharge the mixed materials from the mixing outlet 73 to the receiving port 5. Furthermore, the premixing bin 7 is tapered, and its lower cross section is gradually reduced, which is conducive to the concentrated flow and external discharge of materials.

[0029] A receiving bin 8 is provided at the upper part of the premix bin 7, and a plurality of feed ports are provided at different heights on the receiving bin 8. In this embodiment, two upper feed ports 81 are provided for supplying materials with a relatively high density, and a lower feed port 82 is provided for supplying resin paste. The utility model provides a preliminary stirring device between the upper feed port 81 and the lower feed port 82. In this embodiment, the preliminary stirring device is a grid stirrer 9, and the grid stirrer 9 is a cylindrical grid, and the end of the grid stirrer 9 is fixed on the side wall of the receiving bin 8 and extends to the outside to be connected to the grid drive motor 82. Driven by the grid drive motor 82, the grid stirrer 9 can perform preliminary stirring on the materials with a relatively high density.

[0030] Furthermore, an auxiliary feed port 83 is provided inside the receiving bin 8, and the auxiliary feed port 83 is used to supply a regulator or auxiliary feed to the inside. In this application condition, when the viscosity of the resin paste is high, it can be diluted and reduced by adding a thickening agent; in some special processes, other materials besides the above three materials can also be supplied through the auxiliary feed port 83.

[0031] Embodiment 2:

[0032] When the utility model is specifically operated, the specific steps are as follows:

[0033] 1. During sheet production, resin paste, magnesium oxide paste, and color paste are connected to the pipeline of the premixing system through their own pipelines; according to their different densities, resin paste is supplied through the lower feed port 82, and magnesium oxide paste and color paste pipelines are arranged in parallel and supplied through the upper feed port 81, and the above three pipelines present a triangular layout;

[0034] 2. The magnesium oxide paste and the color paste are combined at the upper part of the receiving bin 8 and are initially premixed by the grid stirrer 9;

[0035] 3. The magnesium oxide paste, color paste and resin paste are combined at the lower part of the receiving bin 8. When the viscosity of the resin paste is too high, styrene (thickness reducer) can be added through the auxiliary feeding port 83 on the side of the receiving bin 8 to reduce the viscosity, which saves additional stirring time and facilitates production;

[0036] 4. The pre-magnesium oxide paste, color paste and resin paste are combined at the lower part of the receiving bin 8 and then enter the premixing bin 7. The mixed paste enters the premixing bin 7 through the conveying auger. The premixing bin 7 can be connected to a constant temperature cooling system to prevent the friction heat from causing the paste temperature to be too high and to avoid pre-curing of the material. After constant temperature cooling and stirring, the material enters the mixing barrel through the conveying auger through the receiving port 5;

[0037] 5. The mixing barrel is designed with a multi-stage structure, including an upper mixing barrel 6 and a lower booster barrel 62, wherein the lower booster barrel 62 is a tapered structure; the upper mixing barrel 6 is mainly used for mixing, and the lower booster barrel 62 is used for boosting the mixed paste after mixing. The joint between the upper mixing barrel 6 and the lower booster barrel 62 is connected by a snap-on connection, which is convenient for disassembly and cleaning;

[0038] 6. A pressure sensor is arranged on the flow control valve 63 arranged on the lower booster barrel 62. When the mixed paste in the lower booster barrel 62 reaches a certain amount, that is, when a certain pressure is reached, the flow control valve 63 is opened to start production; this form can improve the stirring effect of the mixed paste in the mixing barrel;

[0039] 7. The stirring drive motor 4 is connected to the frequency converter system, and the stirring speed is adjusted according to the pressure induction of the flow control valve 63. When the upper stirring barrel 61 starts to feed, the stirring drive motor 4 has a high frequency, that is, the stirring speed is fast. As the mixed paste in the upper stirring barrel 61 reaches a certain amount, the stirring drive motor 4 frequency is reduced in stages, that is, the stirring speed is slowly reduced to prevent the mixed paste in the stirring barrel from being pre-cured due to excessive stirring speed.

Claims

1. A top-in and bottom-out SMC paste mixing device, characterized in that: It includes a mixing barrel, a vertical stirring device, a premixing device and a flow control device installed at the bottom of the mixing barrel; the top of the mixing barrel is a receiving port, a vertical stirring device that can move vertically is arranged above the receiving port, a vertical driving device is arranged on the vertical stirring device, and the vertical driving device can drive the vertical stirring device to move inside and outside the mixing barrel and stir the materials inside the mixing barrel; a premixing bin is arranged on the premixing device, a mixing driving device and a mixing discharge port are arranged in the premixing bin, a receiving bin is arranged on the upper part of the premixing bin, a plurality of feeding ports are arranged at high and low positions on the receiving bin, and a preliminary stirring device is arranged between the feeding ports arranged at high and low positions.

2. The top-in and bottom-out SMC paste mixing device according to claim 1, characterized in that: The mixing barrel is designed as a multi-stage structure, including an upper mixing barrel and a lower booster barrel. Snap-on connectors are arranged between the multi-stage structures, and a flow control device is arranged on the lower booster barrel.

3. The top-in and bottom-out SMC paste mixing device according to claim 1, characterized in that: The preliminary stirring device comprises a grid stirrer, which is a plate-shaped grid or a cylindrical grid, and its end is fixed on the side wall of the receiving bin and extends to the outside to be connected with the grid drive motor.

4. The top-in and bottom-out SMC paste mixing device according to claim 1, characterized in that: An auxiliary feeding port is arranged inside the receiving bin.

5. The top-in and bottom-out SMC paste mixing device according to claim 1, characterized in that: The premix bin is tapered, and the lower section thereof gradually decreases.

6. The top-in and bottom-out SMC paste mixing device according to claim 1, characterized in that: The vertical stirring device is fixed on a vertical support plate, a guide device is arranged on the vertical support plate, a machine fixing plate is arranged on the guide device, a stirring drive motor is arranged on the machine fixing plate, a driving shaft extends from the bottom of the stirring drive motor, and a stirring blade is arranged on the driving shaft.

7. The top-in and bottom-out SMC paste mixing device according to claim 6, characterized in that: A driving cylinder support plate is arranged on the top of the vertical support plate, and a vertical driving cylinder is arranged on the driving cylinder support plate. The driving end of the vertical driving cylinder is connected to the machine fixing plate to realize vertical driving.

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