Raw material treatment mechanism for BMC (bulk molding compound) production
The integrated drying and mixing structure solves the problems of cumbersome material transfer and uneven mixing in the production of BMC bulk molding compounds, achieving efficient and uniform raw material processing and significantly shortening the production cycle.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI ZHIHE NEW MATERIAL TECHNOLOGY CO LTD
- Filing Date
- 2025-06-06
- Publication Date
- 2026-05-12
AI Technical Summary
In the traditional production of BMC bulk molding compounds, the separate steps of raw material drying and mixing lead to cumbersome material handling, increased energy consumption, and the dried fillers and fibers are prone to clumping, resulting in uneven mixing and low mixing efficiency.
The system adopts an integrated drying chamber and mixing cylinder structure. The rotating rod and gear set are driven by a servo motor to achieve synchronous rotation of the drying chamber and the mixing structure. Combined with the inclined guide plate and multi-directional shearing mixing blades, it ensures uniform drying and efficient mixing of materials.
It achieves dynamic and uniform drying and efficient mixing of materials, shortens the production cycle, improves mixing efficiency, and avoids the material turnover delay and agglomeration problems of traditional step-by-step processes.
Smart Images
Figure CN224224238U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of BMC material processing technology, and in particular to a raw material processing mechanism for the production of BMC bulk molding compound. Background Technology
[0002] BMC (bulk molding compound) is a thermosetting composite material whose main raw materials include unsaturated polyester resin, calcium carbonate filler, chopped glass fiber, and various additives. The calcium carbonate filler and chopped glass fiber must be thoroughly dried before mixing to prevent residual moisture from causing abnormal resin curing or porosity defects in the finished product.
[0003] In traditional production processes, raw material drying and mixing are typically performed in separate steps: drying and mixing equipment operate independently, leading to cumbersome material handling, increased energy consumption, and the tendency for dried fillers and fibers to clump again due to electrostatic forces or humidity changes, affecting the uniformity of dispersion in the subsequent resin slurry. Furthermore, existing mixing devices often employ a single stirring shaft structure, which struggles to achieve efficient shearing in the mixing system of high-viscosity resin and powdered fillers, easily resulting in mixing dead zones. Some equipment attempts to integrate drying functions, but the uncontrollable material fall leads to concentrated distribution in a specific area of the resin slurry after drying, requiring prolonged stirring to achieve uniform mixing, resulting in low raw material mixing efficiency. Therefore, we propose a raw material handling mechanism for the production of BMC (bulk molding compound). Utility Model Content
[0004] The present invention mainly addresses the technical problems existing in the prior art by providing a raw material processing mechanism for the production of BMC bulk molding compound.
[0005] To achieve the above objectives, this utility model adopts the following technical solution: a raw material processing mechanism for BMC bulk molding compound production, comprising a mixing cylinder, a guide cylinder fixedly installed at the upper end of the mixing cylinder, a housing fixedly installed at the upper end of the guide cylinder, a rotating rod penetrating through the mixing cylinder, the guide cylinder, and the housing, a servo motor installed on the bottom surface of the mixing cylinder, the output end of the servo motor being fixedly connected to the end of the rotating rod, the rotating rod being driven to rotate by turning on the servo motor, a drying chamber fixedly installed on the outer wall of the housing, a heating wire embedded in the inner wall of the drying chamber, the upper end face of the drying chamber being rotatably connected to the top inner wall of the housing, multiple material feeding ports penetrating through the periphery of the bottom surface of the drying chamber, two symmetrically arranged mixing and stirring rods rotatably installed on the bottom surface of the mixing cylinder on both sides of the rotating rod, multiple stirring blades fixedly installed on the outer wall of the mixing and stirring rods, a second feed pipe fixedly installed on the upper half of the outer wall of the mixing cylinder, a discharge pipe fixedly installed on the lower half of the outer wall of the housing, and a valve rotatably installed inside the discharge pipe.
[0006] Preferably, a drive gear is rotatably mounted on the bottom surface of the mixing cylinder, and the drive gear is fixedly connected to the outer wall of the output end of the servo motor. Driven gears are rotatably mounted on the bottom surface of the mixing cylinder and at corresponding positions of the ends of the two mixing rods, and the drive gear is meshed with both driven gears.
[0007] Preferably, the drying chamber has multiple inclined third and fourth guide plates fixedly installed inside, and the inclination directions of the third and fourth guide plates are opposite.
[0008] Preferably, a material distribution block is fixedly installed at the upper end of the rotating rod, and a first feed pipe is fixedly installed on the upper end face of the housing outside the material distribution block.
[0009] Preferably, multiple stirring blades are also fixedly installed on the outer wall of the mixing cylinder where the rotating rod is connected, and the stirring blades fixedly installed on the outer wall of the rotating rod are used in conjunction with the stirring blades fixedly installed on the outer wall of the mixing rod.
[0010] Preferably, a first guide plate is fixedly installed on the inner wall of the shell below the drying chamber, and a second guide plate is fixedly installed on the outer wall of the rotating rod below the first guide plate, with the first guide plate and the second guide plate having opposite inclination directions.
[0011] Preferably, the bottom surface of the mixing cylinder is fixedly equipped with multiple support legs, and all the support legs are inclined.
[0012] Beneficial effects
[0013] This invention provides a raw material processing mechanism for the production of BMC (bulk molding compound). It has the following beneficial effects:
[0014] (1) The raw material handling mechanism for BMC bulk molding compound production integrates the drying chamber above the mixing cylinder and achieves synchronous rotation of the drying chamber and the stirring structure under the drive of the rotating rod. The heating wire embedded in the drying chamber dynamically heats the calcium carbonate filler and chopped glass fiber. Combined with the centrifugal force, the material is evenly thrown down through the feeding port, which solves the problem of uneven heating caused by traditional static drying. At the same time, the servo motor drives the mixing rod and the rotating rod to operate synchronously through the gear set, so that the resin slurry and the dried filler and fiber are mixed in real time under the shearing action of the stirring blades, avoiding the material turnover delay of the traditional step process and significantly shortening the production cycle.
[0015] (2) The raw material processing mechanism for the production of BMC bulk molding compound uses the reverse inclined layout of the first guide plate and the second guide plate to make the dried material enter the mixing drum after being dispersed by three impacts, effectively breaking the agglomeration of filler. The stirring blade adopts a triangular hollow structure, and the stirring blade group on the rotating rod and the mixing rod is staggered to form a multi-directional shear force field, which further enhances the kneading and dispersing effect on high viscosity resin and powdered filler. Attached Figure Description
[0016] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.
[0017] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.
[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0019] Figure 2 This is a schematic cross-sectional view of the mixing cylinder structure of this utility model;
[0020] Figure 3 This is a schematic cross-sectional view of the drying chamber structure of this utility model;
[0021] Figure 4 This is a schematic cross-sectional view of the overall structure of this utility model;
[0022] Figure 5 This is a schematic diagram showing the positional distribution of the heating wire structure of this utility model.
[0023] Legend: 1. Shell; 2. Mixing cylinder; 3. Guide cylinder; 4. Support leg; 5. Discharge pipe; 6. First feed pipe; 7. Dividing block; 8. Valve; 9. First guide plate; 10. Second guide plate; 11. Second feed pipe; 12. Rotating rod; 13. Drive gear; 14. Servo motor; 15. Driven gear; 16. Mixing rod; 17. Stirring blade; 18. Drying chamber; 19. Third guide plate; 20. Fourth guide plate; 21. Material outlet; 22. Heating wire. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] like Figure 1-5 As shown, a raw material processing mechanism for BMC (bulk molding compound) production includes a mixing cylinder 2, a guide cylinder 3 fixedly installed at the upper end of the mixing cylinder 2, and a housing 1 fixedly installed at the upper end of the guide cylinder 3. A rotating rod 12 is installed through the interior of the mixing cylinder 2, the guide cylinder 3, and the housing 1. A servo motor 14 is installed on the bottom surface of the mixing cylinder 2, and the output end of the servo motor 14 is fixedly connected to the end of the rotating rod 12. The rotating rod 12 is driven to rotate by turning on the servo motor 14. A drying chamber 18 is fixedly installed on the outer wall inside the housing 1 through the rotating rod 12. An electric heating wire 22 is embedded in the inner wall of the drying chamber 18. The upper end face of the drying chamber 18 is rotatably connected to the top inner wall of the housing 1. Multiple material feeding ports 21 are opened through the periphery of the bottom surface of the drying chamber 18. Two symmetrically arranged mixing and stirring rods 16 are rotatably installed on both sides of the rotating rod 12 on the bottom surface of the mixing cylinder 2. Multiple stirring blades 17 are fixedly installed on the outer wall of the mixing and stirring rods 16. A second feed pipe 11 is fixedly installed on the outer wall of the upper half of the mixing cylinder 2. A discharge pipe 5 is fixedly installed on the lower half of the outer wall, and a valve 8 is rotatably installed inside the discharge pipe 5. During use, liquid resin slurry and the like are fed into the mixing cylinder 2 through the second feed pipe 11. At this time, the valve 8 in the discharge pipe 5 is closed. Then, calcium carbonate filler and chopped glass fiber for the production of BMC bulk molding compound enter the drying chamber 18 from the upper end of the shell 1. The bottom surface of the drying chamber 18 is equipped with a battery that can independently power the heating wire 22 embedded inside the drying chamber 18. Under the action of the heating wire 22, the material inside the drying chamber 18 can be dried. During the drying process of the material in the drying chamber 18, the drying chamber 18 is rotated evenly under the action of the rotating rod 12, so that the material inside the drying chamber 18 can fall from the feeding port 21 under the action of centrifugal force. The dried material can then be added into the resin slurry inside the mixing cylinder 2 and mixed under the action of two mixing rods 16 and multiple mixing blades 17.
[0026] like Figure 2As shown, a drive gear 13 is rotatably mounted on the bottom surface of the mixing cylinder 2. The drive gear 13 is fixedly connected to the outer wall of the output end of the servo motor 14. Driven gears 15 are rotatably mounted on the bottom surface of the mixing cylinder 2 at the corresponding positions of the ends of the two mixing stirring rods 16, and the drive gear 13 is meshed with the two driven gears 15. Under the driving action of the servo motor 14, the drive gear 13 drives the two driven gears 15 to rotate synchronously, thereby causing the mixing stirring rods 16 fixedly connected to the driven gears 15 to rotate synchronously. Thus, under the drive of the servo motor 14, the two mixing stirring rods 16 and the rotating rod 12 can rotate synchronously, thereby mixing the resin slurry, calcium carbonate filler, and chopped glass fiber inside the mixing cylinder 2 through multiple stirring blades 17.
[0027] like Figure 4 As shown, multiple inclined third guide plates 19 and fourth guide plates 20 are fixedly installed inside the drying chamber 18, and the inclination directions of the third guide plates 19 and fourth guide plates 20 are opposite. The arrangement of multiple third guide plates 19 and fourth guide plates 20 can, on the one hand, block the material and prolong the time the material stays inside the drying chamber 18, and on the other hand, make the material disperse and distribute inside the drying chamber 18 during the movement under the guidance of the third guide plates 19 and fourth guide plates 20, thereby accelerating the drying efficiency of the material.
[0028] like Figure 4 As shown, a material distribution block 7 is fixedly installed on the upper end of the rotating rod 12, and a first feed pipe 6 is fixedly installed on the upper end face of the housing 1 outside the material distribution block 7. The material distribution block 7 is a frustum-shaped structure that is narrow at the top and wide at the bottom. When the material to be dried is fed into the drying chamber 18, it will first collide with the material distribution block 7, and then be guided into the drying chamber 18 along the inclined outer wall of the material distribution block 7. The setting of the first feed pipe 6 can prevent the material from falling outside the device when it is fed.
[0029] like Figure 4 As shown, multiple stirring blades 17 are also fixedly installed on the outer wall of the mixing cylinder 2 inside the rotating rod 12. The stirring blades 17 fixedly installed on the outer wall of the rotating rod 12 cooperate with the stirring blades 17 fixedly installed on the outer wall of the mixing rod 16. The stirring blades 17 have a triangular cross-section and are hollow. The cooperation between the multiple stirring blades 17 fixedly installed on the outer wall of the rotating rod 12 and the multiple stirring blades 17 fixedly installed on the outer wall of the mixing rod 16 can enhance the shear force on the resin slurry and the mixing of fillers and glass fibers during mixing, thereby enhancing the mixing effect.
[0030] like Figure 4As shown, a first guide plate 9 is fixedly installed on the inner wall of the shell 1 below the drying chamber 18, and a second guide plate 10 is fixedly installed on the outer wall of the rotating rod 12 below the first guide plate 9. The first guide plate 9 and the second guide plate 10 are inclined in opposite directions. When materials such as calcium carbonate and chopped glass fall outward from the material outlet 21 opened on the bottom surface of the drying chamber 18 after drying, they first fall onto the upper surface of the first guide plate 9. Then, under the guidance of the first guide plate 9, they fall onto the upper surface of the second guide plate 10. After the second guide plate 10 cooperates with the inner wall of the guide cylinder 3, the material enters the mixing cylinder 2 after three impacts. The material after the impact is more loose, which makes it easier to mix evenly with the resin slurry in the mixing cylinder 2.
[0031] like Figure 4 As shown, multiple support legs 4 are fixedly installed on the bottom surface of the mixing cylinder 2, and all the support legs 4 are inclined. The multiple support legs 4 can raise the entire device, so that the bottom of the mixing cylinder 2 has enough space to install structures such as the drive gear 13, the servo motor 14 and the driven gear 15.
[0032] The working principle of this invention is as follows: When using this invention, the calcium carbonate filler and chopped glass fibers used in the production of BMC bulk molding compound need to be pre-dried. Users can add these materials into the drying chamber 18 for drying. The drying chamber 18 is equipped with multiple third guide plates 19 and fourth guide plates 20, which extend the residence time of the materials inside. Furthermore, the drying chamber 18 rotates under the action of the rotating rod 12, and centrifugal force allows the materials inside the drying chamber 18 to be added into the resin slurry inside the mixing drum 2. This process further facilitates the drying process. During the process of adding calcium carbonate filler and chopped glass fiber into the resin slurry by rotating the hopper 18, a small amount of dried material can be continuously added to the resin slurry. In conjunction with the two mixing rods 16 and the mixing blades 17 inside the mixing cylinder 2, the resin slurry and the added material are mixed, which can improve the mixing efficiency and make the mixing effect between the resin slurry and the added material better. In addition, the device can make the mixing of materials that need to be dried and other raw materials simultaneously, further improving the processing efficiency of BMC bulk molding compound raw materials and enhancing the practicality of the device.
[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A raw material processing mechanism for the production of BMC (bulk molding compound), comprising a mixing cylinder (2), characterized in that: A guide cylinder (3) is fixedly installed at the upper end of the mixing cylinder (2), and a housing (1) is fixedly installed at the upper end of the guide cylinder (3). A rotating rod (12) is installed through the interior of the mixing cylinder (2), the guide cylinder (3), and the housing (1). A servo motor (14) is installed on the bottom surface of the mixing cylinder (2). The output end of the servo motor (14) is fixedly connected to the end of the rotating rod (12). The rotating rod (12) is driven to rotate by turning on the servo motor (14). A drying chamber (18) is fixedly installed on the outer wall inside the housing (1) through the rotating rod (12). An electric heating wire is embedded in the inner wall of the drying chamber (18). (22) The upper end face of the drying chamber (18) is rotatably connected to the top inner wall of the shell (1). Multiple material feeding ports (21) are opened through the bottom periphery of the drying chamber (18). Two symmetrically arranged mixing rods (16) are rotatably installed on both sides of the rotating rod (12) on the bottom surface of the mixing cylinder (2). Multiple mixing blades (17) are fixedly installed on the outer wall of the mixing rod (16). A second feed pipe (11) is fixedly installed on the upper half of the outer wall of the mixing cylinder (2). A discharge pipe (5) is fixedly installed on the lower half of the outer wall of the shell (1). A valve (8) is rotatably installed inside the discharge pipe (5).
2. The raw material processing mechanism for BMC bulk molding compound production according to claim 1, characterized in that: The bottom surface of the mixing cylinder (2) is rotatably mounted with a drive gear (13), which is fixedly connected to the outer wall of the output end of the servo motor (14). The bottom surface of the mixing cylinder (2) and the corresponding positions of the ends of the two mixing rods (16) are rotatably mounted with driven gears (15), and the drive gear (13) and the two driven gears (15) are meshed.
3. The raw material processing mechanism for BMC bulk molding compound production according to claim 2, characterized in that: The drying chamber (18) is fixedly installed with multiple inclined third guide plates (19) and fourth guide plates (20), and the inclination directions of the third guide plates (19) and the fourth guide plates (20) are opposite.
4. The raw material processing mechanism for BMC bulk molding compound production according to claim 3, characterized in that: The upper end of the rotating rod (12) is fixedly installed with a material distribution block (7), and the upper end face of the housing (1) is fixedly installed with a first feed pipe (6) on the outside of the material distribution block (7).
5. The raw material processing mechanism for BMC bulk molding compound production according to claim 4, characterized in that: The rotating rod (12) is connected to the outer wall of the mixing cylinder (2) and multiple stirring blades (17) are also fixedly installed. The stirring blades (17) fixedly installed on the outer wall of the rotating rod (12) are used in conjunction with the stirring blades (17) fixedly installed on the outer wall of the mixing rod (16).
6. The raw material processing mechanism for BMC bulk molding compound production according to claim 5, characterized in that: The inner wall of the housing (1) is fixedly installed with a first guide plate (9) below the drying chamber (18), and the outer wall of the rotating rod (12) is fixedly installed with a second guide plate (10) below the first guide plate (9), and the first guide plate (9) and the second guide plate (10) are inclined in opposite directions.
7. A raw material processing mechanism for the production of BMC bulk molding compound according to claim 6, characterized in that: The bottom surface of the mixing cylinder (2) is fixedly equipped with multiple support legs (4), and all the support legs (4) are inclined.