Automatic preforming equipment for rubber products
By introducing auger conveying and multi-return pipe structure into the rubber product preforming equipment, the problem of raw material settling at the bottom was solved, achieving uniform mixing of rubber raw materials and high-quality preforming, thus improving product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2026-03-10
AI Technical Summary
Existing rubber product preforming equipment is prone to raw material settling at the bottom during the mixing process, resulting in uneven distribution of additives and affecting product quality.
The system employs a screw conveyor assembly and a multi-return pipe structure within the heating tank, combined with solenoid valves and electrically controlled valves, to achieve the circulation mixing and filtration of rubber raw materials, ensuring uniform stirring and extrusion.
It improves the mixing uniformity of rubber raw materials and the quality of finished products, reduces the impact of impurities on extruded products, and realizes integrated processing of storage, mixing and extrusion.
Smart Images
Figure CN223982139U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rubber processing technology, and in particular to an automatic preforming equipment for rubber products. Background Technology
[0002] Automatic preforming equipment for rubber products is a pretreatment device for rubber raw materials. Its main function is to perform a series of pretreatment operations on rubber raw materials during the manufacturing process to facilitate subsequent molding processes. Before preforming, the rubber raw materials need to be introduced into a heating tank to soften them, making them flowable and reducing their viscosity. The heated raw materials then need to be stirred and mixed to ensure uniform dispersion of the various ingredients, thereby improving the performance and quality of the finished rubber product. The mixed raw materials are then fed into an extrusion device, where they are automatically extruded and preformed through the extrusion tube under the action of the extrusion structure.
[0003] However, most common rubber product preforming equipment mixes rubber raw materials in a container, which causes some raw materials to settle to the bottom. This not only affects the uniform distribution of rubber raw material additives, but also affects the quality of the finished rubber products. In view of this, we propose an automatic rubber product preforming equipment. Utility Model Content
[0004] The purpose of this invention is to address the problems existing in the background technology by proposing an automatic preforming equipment for rubber products.
[0005] The technical solution of this utility model is as follows: An automatic preforming equipment for rubber products includes a heating tank, a support frame, and a controller. The heating tank is equipped with a conveying component for facilitating the conveying of rubber raw materials. A three-way solenoid valve is installed at the opening on the side wall of the heating tank. The outlet end of the three-way solenoid valve is connected to an extrusion pipe and a first return pipe. The outlet end of the first return pipe is connected to a second return pipe. A first electrically controlled valve is installed on the bottom wall of the second return pipe. The outlet end of the first electrically controlled valve is connected to a third return pipe. A material guiding component is installed at the top opening of the heating tank. The material guiding component includes a feed pipe. A filter screen and a guide rod are installed inside the feed pipe. A sealing plate, a screw, and a nut are arranged on the front-view wall of the feed pipe.
[0006] Preferably, the conveying assembly includes a motor, and a motor frame is mounted on one side wall of the heating tank, with the motor mounted on the top wall of the motor frame.
[0007] Preferably, a rotating shaft is connected to the output end of the motor, and an auger is sleeved on the outer surface wall of the rotating shaft, with the auger disposed inside the motor.
[0008] Preferably, a reflux port is provided on the top wall of the heating tank, and the bottom end of the third reflux pipe is inserted into the reflux port.
[0009] Preferably, a discharge port is provided on the bottom wall of the second reflux pipe, the first solenoid valve is installed at the discharge port, a second solenoid valve is installed at the opening on the side wall of the feed pipe, and the discharge port of the second reflux pipe is connected to the inlet of the second solenoid valve.
[0010] Preferably, the feed pipe has an insertion port on the front wall, and symmetrical grooves are formed on the inner walls of both sides of the feed pipe. The two guide rods are symmetrically installed on the two side walls of the filter screen and are positioned in the corresponding grooves.
[0011] Preferably, a cover plate is provided at the top opening of the feed pipe, and hinges are symmetrically installed on the outer side wall of the feed pipe, with a portion of the thin sheet of the two hinges connected to the side wall of the cover plate.
[0012] Compared with the prior art, the present invention has the following beneficial technical effects:
[0013] 1. This utility model uses a motor to drive a rotating shaft to rotate an auger. The rotating auger, in conjunction with a heating tank, conveys rubber raw materials. By switching a three-way solenoid valve, the rubber raw materials can be introduced into the first return pipe, and then guided back into the heating tank through the second return pipe, the first solenoid valve, and the third return pipe. This process is repeated to improve the mixing effect of the rubber raw materials. At the same time, under the switching action of the three-way solenoid valve, the materials can be directly extruded through the extrusion pipe to achieve pre-forming, which facilitates subsequent processing and integrates storage, mixing, and extrusion.
[0014] 2. This utility model closes the first solenoid valve and, guided by the second return pipe, opens the second solenoid valve on the feed pipe, allowing the rubber raw material to be introduced into the feed pipe. At this time, the rubber raw material is in a liquid state. After being filtered by the filter screen, it is easy to filter it, reducing the impact of impurities on the subsequent extruded finished product. The filter screen can also be disassembled and cleaned to avoid clogging and affecting the subsequent filtration of the rubber raw material. Attached Figure Description
[0015] Figure 1 This is a three-dimensional structural diagram of an automatic preforming equipment for rubber products.
[0016] Figure 2 yes Figure 1 A three-dimensional structural diagram of the conveyor component;
[0017] Figure 3 yes Figure 1 A schematic diagram of the unfolded structure of the material guiding component.
[0018] Reference numerals: 1. Heating tank; 2. Support frame; 3. Conveying assembly; 31. Motor; 32. Rotating shaft; 33. Screw; 4. Motor frame; 5. Controller; 6. Material guiding assembly; 61. Feed pipe; 62. Cover plate; 63. Filter screen; 64. Sealing plate; 65. Screw; 66. Nut; 67. Guide rod; 68. Hinge; 7. Three-way solenoid valve; 8. Extrusion tube; 9. First return pipe; 10. Second return pipe; 11. First solenoid valve; 12. Third return pipe. Detailed Implementation
[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.
[0020] Example 1
[0021] like Figures 1 to 2 As shown, this utility model proposes an automatic preforming equipment for rubber products, including a heating tank 1, which is mounted on a support 2 and supported by the vertical plate structure of the support 2; a conveying assembly 3 includes a motor 31, a rotating shaft 32, and an auger 33, with the motor 31 mounted on the top wall of a motor frame 4, and the motor frame 4 mounted on the side wall of the heating tank 1 and the side wall of the vertical plate structure of the support 2, supporting the motor 31; and a controller 5 mounted on the front-facing wall of the motor frame 4 for easy operation by the operator; the rotating shaft 32 and the auger 33... All augers 33 are installed inside the heating tank 1. The auger 33 is sleeved on the outer surface wall of the rotating shaft 32. A rotating groove is opened on one side inner wall of the heating tank 1, and a rotating hole is opened on the other side wall of the heating tank 1. Sealed bearings are arranged in both the rotating hole and the rotating groove. Two sealed bearings are sleeved on the outer surface wall of the rotating shaft 32 to assist the rotating shaft 32 in positioning and rotation. One end of the rotating shaft 32 is connected to the output end of the motor 31, which is beneficial for the rotating shaft 32 to drive the auger 33 to rotate and transport the rubber raw material in the heating tank 1 under the drive of the motor 31.
[0022] Furthermore, the three-way solenoid valve 7 is installed at the opening on one side of the outer wall of the heating tank 1. The inlet ends of the extrusion pipe 8 and the first reflux pipe 9 are connected to the two outlet ends of the three-way solenoid valve 7, which facilitates switching under the setting of the three-way solenoid valve 7 and makes it convenient to adjust the reflux or extrusion state of the rubber raw material. The first reflux pipe 9 is L-shaped, and the outlet of the first reflux pipe 9 is connected to the inlet end of the second reflux pipe 10. The second reflux pipe 10 is set in an inclined state to assist the flow of the rubber raw material in the second reflux pipe 10. The bottom end of the third reflux pipe 12 is connected to the reflux port opened on the top wall of the heating tank 1 and is set in a vertical state. The first solenoid valve 11 is installed at the top of the third reflux pipe 12, and the inlet end of the first solenoid valve 11 is installed in the discharge port opened on the bottom wall of the second reflux pipe 10, which facilitates the adjustment of the flow direction of the rubber raw material in the second reflux pipe 10 and makes it easier for the raw material to reflux under the guidance of the first solenoid valve 11 and the third reflux pipe 12, thereby improving the uniformity of the mixing process.
[0023] In this embodiment, the starting motor 31 drives the rotating shaft 32 to rotate the auger 33 inside the heating tank 1, so that the raw material is conveyed under the rotation of the auger 33 and switched through the outlet of the three-way solenoid valve 7. Thus, the extrusion or reflux state of the raw material can be adjusted according to the processing requirements of the rubber raw material. When the connection between the extrusion pipe 8 and the three-way solenoid valve 7 is in a connected state, the raw material can be automatically extruded. When the connection between the first reflux pipe 9 and the three-way solenoid valve 7 is in a connected state, the rubber raw material can be guided into the second reflux pipe 10. The inclined state of the second reflux pipe 10 facilitates the raw material to enter the third reflux pipe 12 from the first solenoid valve 11 in the open state and then flow back into the heating tank 1. This cycle is repeated, and with the rotation and conveying of the auger 33, the rubber raw material can be heated evenly, while improving the mixing quality.
[0024] Example 2
[0025] like Figures 1 to 3 As shown, the stainless steel pipe end docking device proposed in this utility model, compared with Embodiment 1, further includes a heating tank 1 and a second return pipe 10. The material guiding assembly 6 includes a feed pipe 61, a cover plate 62, a filter screen 63, a sealing plate 64, a screw 65, a nut 66, a guide rod 67, and a hinge 68. The feed pipe 61 is installed at the feed inlet at the top of the heating tank 1 and is used to guide the raw material into the heating tank 1. The cover plate 62 is arranged at the top opening of the feed pipe 61 and is used to cover the top of the feed pipe 61. The closed state of the feed pipe 61 can be adjusted according to the working state of the heating tank 1. Two hinges 68 are symmetrically installed on the outer wall of the feed pipe 61. Parts of the thin plates of the two hinges 68 are connected to the side wall of the cover plate 62, so that the cover plate 62 can be flipped with the assistance of the hinges 68, which is convenient for the operator to operate.
[0026] The second solenoid valve is installed in an opening on one side wall of the feed pipe 61. The outlet end of the second return pipe 10 is connected to the inlet end of the second solenoid valve, which facilitates the introduction of raw materials requiring secondary processing into the feed pipe 61. At the same time, it can share the guiding pressure of the first solenoid valve 11 and the third return pipe 12. Two guide rods 67 are symmetrically welded to the outer walls of the filter screen 63 on both sides. The two guide rods 67 and the filter screen 63 pass through the insertion port on the feed pipe 61 facing the wall. Since the insertion port is connected to the sliding grooves symmetrically opened on the inner walls of the feed pipe 61 on both sides, the guide rods 67 inserted into the feed pipe 61 play a supporting and limiting role for the filter screen 63. Furthermore, the filter screen 63 facilitates the filtration of the returned raw materials.
[0027] The back wall of the sealing plate 64 is fixedly connected to the front wall of the filter screen 63. The size of the sealing plate 64 is larger than the inlet on the front wall of the feed pipe 61, which is beneficial for blocking and sealing the front wall of the feed pipe 61. Two screws 65 are symmetrically welded to the front wall of the feed pipe 61. Two protrusions are symmetrically arranged at the top of the sealing plate 64, and positioning holes are symmetrically opened on the two protrusions. One end of each of the two screws 65 passes through the corresponding positioning hole. Two nuts 66 are located on the front wall of the sealing plate 64 and are sleeved on the outer surface of the screws 65, which plays a positioning role for the sealing plate 64. This facilitates the disassembly and assembly of the filter screen 63 according to the usage, so as to prevent affecting the subsequent automatic preforming operation of rubber raw materials.
[0028] In this embodiment, when the rubber raw material needs to be filtered, the first solenoid valve 11 is closed, causing the second solenoid valve to open. Under the guidance of the second return pipe 10, the raw material enters the feed pipe 61, and the filter screen 63 completes the filtration process, reducing the amount of impurities mixed in the raw material and its impact on the subsequent finished rubber products. When it is necessary to assist the second return pipe 10 in returning the raw material, the nut 66 can be unscrewed to release the restriction on the sealing plate 64, which facilitates the disassembly of the filter screen 63. This makes it easier to share the responsibility of guiding the return of the raw material between the first solenoid valve 11 and the third return pipe 12. Furthermore, the detachable design of the filter screen 63 allows the staff to clean the filter screen 63, reducing the impact on subsequent filtration.
[0029] The above specific embodiments are merely several preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.
Claims
1. An automatic preforming apparatus for rubber products, comprising a heating tank (1), a support (2) and a controller (5), characterized in that: The heating tank (1) is provided with a conveying assembly (3) for conveying rubber raw materials, a three-way electromagnetic valve (7) is installed at the opening of the side wall of the heating tank (1), an outlet end of the three-way electromagnetic valve (7) is connected with an extrusion pipe (8) and a first return pipe (9), an outlet end of the first return pipe (9) is connected with a second return pipe (10), a first electric control valve (11) is installed at the bottom wall of the second return pipe (10), an outlet end of the first electric control valve (11) is connected with a third return pipe (12), a material guiding assembly (6) is installed at the top opening of the heating tank (1), the material guiding assembly (6) comprises a feeding pipe (61), the feeding pipe (61) is provided with a filter screen (63) and a guide rod (67), and a sealing plate (64), a screw rod (65) and a screw cap (66) are arranged on the front wall of the feeding pipe (61).
2. An apparatus for automatically preforming a rubber article according to claim 1, wherein The conveying assembly (3) comprises a motor (31), and a motor rack (4) is installed on one side wall of the heating tank (1), and the motor (31) is installed on the top wall of the motor rack (4).
3. An apparatus for automatically preforming a rubber article according to claim 2, wherein An output end of the motor (31) is connected with a rotating shaft (32), the rotating shaft (32) is sleeved with an auger (33) on the outer surface wall, and the auger (33) is arranged in the motor (31).
4. An apparatus for automatically preforming a rubber article according to claim 1, wherein A return flow port is formed in the top wall of the heating tank (1), and the bottom end of the third return pipe (12) is inserted into the return flow port.
5. An apparatus for automatically preforming a rubber article according to claim 1, wherein A discharge port is formed in the bottom wall of the second return pipe (10), the first electric control valve (11) is installed at the discharge port, a second electric control valve is installed at the opening of the side wall of the feeding pipe (61), and the discharge port of the second return pipe (10) is connected with the inlet of the second electric control valve.
6. An apparatus for automatically preforming a rubber article according to claim 1, wherein An insertion port is formed in the front wall of the feeding pipe (61), and two guide rods (67) are symmetrically installed on the two side walls of the filter screen (63) and arranged in the position corresponding sliding grooves.
7. An apparatus for automatically preforming a rubber article according to claim 1, wherein A cover plate (62) is arranged at the top opening of the feeding pipe (61), two hinges (68) are symmetrically installed on the outer wall of the feeding pipe (61), and part of the sheets of the two hinges (68) are connected with the side wall of the cover plate (62).