Continuous production device for silicone sealant
By improving the structure of the continuous production equipment for silicone sealant and using a premixed screw mixer to modify the low-end powder, the problem of decreased silicone sealant quality caused by mixing low-end and high-end powders was solved, achieving high-quality production and cost optimization.
Patent Information
- Application Number
- CN202422906115.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2034-11-27
AI Technical Summary
In existing technologies, the use of low-end and high-end fillers such as calcium carbonate powder leads to a decline in the quality of silicone sealants.
The system employs a combined structure consisting of a low-end powder input unit, a first basic polymer input unit, a premix screw mixer, a high-end powder input unit, a second basic polymer input unit, a feeder, and a main mixing screw mixer. The low-end powder is modified in the premix screw mixer to reduce its surface polarity and increase its oil absorption value. Subsequently, it is fully mixed with the high-end powder and the basic polymer in the main mixing screw mixer to avoid the generation of particulate matter.
It improves the production quality of silicone sealant, reduces particulate defects, lowers equipment costs, and eliminates the need for additional filtration devices.
Smart Images
Figure CN223931245U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of silicone sealant technology, and in particular relates to a continuous production apparatus for silicone sealant. Background Technology
[0002] Silicone sealants are widely used in construction, machinery, electronics and other fields. They can be divided into two-component silicone sealants and one-component silicone sealants. Two-component silicone sealants consist of two separately packaged components A and B. When using them, components A and B are mixed in a certain proportion and then cured. One-component silicone sealants consist of a base adhesive and a curing agent. They can be cured when exposed to moisture. One-component silicone sealants are more convenient to use.
[0003] The raw materials for silicone sealants include: basic polymers such as polydimethylsiloxane, fillers such as calcium carbonate powder, catalysts, etc. Calcium carbonate powder and other fillers play a reinforcing role in silicone sealants. To reduce quality defects such as clumping and particles in silicone sealants, it is necessary to fully knead and disperse the calcium carbonate powder and other fillers and the polydimethylsiloxane during the production process. Currently, calcium carbonate powder manufacturers perform surface treatment on commercially available calcium carbonate powder and other fillers to make the surface of the inorganic component non-polar or low-polar, increasing the oil absorption value and improving the quality of commercially available calcium carbonate powder and other fillers. This is beneficial for improving the compatibility between calcium carbonate powder and other fillers and the organic component polydimethylsiloxane, and promotes the kneading and dispersion of calcium carbonate powder and other fillers and the basic polymers such as polydimethylsiloxane during the silicone sealant production process.
[0004] However, some manufacturers of calcium carbonate powder and other fillers have poor surface treatment, resulting in relatively low-quality and inexpensive products. Others have good surface treatment, producing high-quality products that are also more expensive. In the production of silicone sealants, to reduce costs, some manufacturers mix low-end and high-end calcium carbonate powder and fillers. However, during production, it has been found that when the mixed calcium carbonate powder and filler, along with the polysiloxane base polymer, enter the screw mixer, the significant quality difference between the low-end and high-end fillers easily leads to granular formation, making thorough mixing and grinding impossible, thus reducing the quality of the produced silicone sealant. Utility Model Content
[0005] In view of this, this application provides a continuous production apparatus for silicone sealant to solve the technical problem that the quality of silicone sealant is easily reduced when low-end and high-end powders are mixed in the prior art.
[0006] The first aspect of this application provides a continuous production apparatus for silicone sealant, comprising: a low-end powder input unit, a first basic polymer input unit, a premix screw mixer, a high-end powder input unit, a second basic polymer input unit, a feeder, and a main mixing screw mixer;
[0007] The low-end powder input unit is connected to the feed inlet of the premixed screw mixer, and the first basic polymer input unit is connected to the feed inlet of the premixed screw mixer.
[0008] The discharge port of the premixed screw mixer is connected to the inlet of the feeder;
[0009] The high-end powder input unit is connected to the feed inlet of the feeder, and the second basic polymer input unit is connected to the feed inlet of the feeder.
[0010] The discharge port of the feeder is connected to the inlet of the main screw mixer.
[0011] Preferably, the low-end powder input unit includes a low-end powder storage tank and a low-end powder metering and conveying device;
[0012] The discharge port of the low-end powder storage tank is connected to the inlet of the low-end powder metering and conveying device, and the discharge port of the low-end powder metering and conveying device is connected to the inlet of the premixed screw mixer.
[0013] Preferably, the first basic polymer input unit includes a first basic polymer storage tank and a first basic polymer metering pump;
[0014] The outlet of the first basic polymer storage tank is connected to the inlet of the first basic polymer metering pump, and the outlet of the first basic polymer metering pump is connected to the inlet of the premixed screw mixer.
[0015] Preferably, the high-end powder input unit includes a high-end powder storage tank and a high-end powder metering and conveying device;
[0016] The discharge port of the high-end powder storage tank is connected to the inlet of the high-end powder metering and conveying device, and the discharge port of the high-end powder metering and conveying device is connected to the inlet of the feeder.
[0017] Preferably, the second basic polymer input unit includes a second basic polymer storage tank and a second basic polymer metering pump;
[0018] The outlet of the second basic polymer storage tank is connected to the inlet of the second basic polymer metering pump, and the outlet of the second basic polymer metering pump is connected to the inlet of the feeder.
[0019] Preferably, the first basic polymer metering pump is selected from a twin-screw metering pump, and the second basic polymer metering pump is selected from a single-screw metering pump.
[0020] Preferably, the single screw metering pump is selected from horizontal single screw metering pumps.
[0021] Preferably, the twin-screw metering pump is selected from a horizontal single-screw metering pump.
[0022] Preferably, the low-end powder metering and conveying device and the high-end powder metering and conveying device are selected from mechanical metering and conveying devices or pneumatic metering and conveying devices.
[0023] Preferably, the premixed screw mixer and the main mixing screw mixer are selected from single-screw mixers or twin-screw mixers.
[0024] In summary, this application provides a continuous production apparatus for silicone sealant. The apparatus includes a low-end powder input unit, a first basic polymer input unit, a premixed screw mixer, a high-end powder input unit, a second basic polymer input unit, a feeder, and a main mixing screw mixer. In this continuous production apparatus, the low-end powder input unit, the input low-end powder, and the first basic polymer input from the first basic polymer input unit can sequentially pass through the premixed screw mixer and the main mixing screw mixer. The low-end powder and the first basic polymer... In the premixed screw mixer, the first base polymer can modify the low-end powder, reducing the surface polarity of the low-end powder and increasing its oil absorption value. After processing in the premixed screw mixer, the quality of the low-end powder can be close to that of the high-end powder. In the main mixing screw mixer, the low-end powder, high-end powder, first base polymer, and second base polymer are less likely to produce particles and are effectively mixed and ground by the main mixing screw mixer, thus improving the quality of the produced silicone sealant. This solves the technical problem in the existing technology where the mixing of low-end and high-end powders easily leads to a decrease in the quality of silicone sealant. Attached Figure Description
[0025] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0026] Figure 1 This is a schematic diagram of a continuous production apparatus for silicone sealant provided in this application.
[0027] Figure 1The reference numerals in the attached diagram are as follows: 1. Low-end powder input unit; 2. First basic polymer input unit; 3. Premixed screw mixer; 4. High-end powder input unit; 5. Second basic polymer input unit; 6. Feeder; 7. Main mixing screw mixer; 8. Low-end powder storage tank; 9. Low-end powder metering pump; 10. First basic polymer storage tank; 11. First basic polymer metering pump; 12. High-end powder storage tank; 13. High-end powder metering pump; 14. Second basic polymer storage tank; 15. Second basic polymer metering pump. Detailed Implementation
[0028] This application provides a continuous production apparatus for silicone sealant, which solves the technical problem that the quality of silicone sealant is easily reduced when low-end and high-end powders are mixed in the prior art.
[0029] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0030] Example 1
[0031] Embodiment 1 of this application provides a continuous production apparatus for silicone sealant, the structure of which is shown in the figure below. Figure 1 As shown, the system includes: a low-end powder input unit consisting of a low-end powder storage tank and a mechanical low-end powder metering and conveying device; a first basic polymer input unit consisting of a first basic polymer storage tank and a first basic polymer twin-screw metering pump; a single-screw premixing screw mixer; a high-end powder input unit consisting of a high-end powder storage tank and a mechanical high-end powder metering and conveying device; a second basic polymer input unit consisting of a second basic polymer storage tank and a second basic polymer single-screw metering pump; a feeder; and a twin-screw main mixing screw mixer, etc.
[0032] In the continuous silicone sealant production unit, the connection relationship between the low-end powder input unit, the first basic polymer input unit, and the premixed screw mixer is as follows: the outlet of the low-end powder storage tank is connected to the inlet of the low-end powder metering and conveying device, and the outlet of the low-end powder metering and conveying device is connected to the inlet of the premixed screw mixer; the outlet of the first basic polymer storage tank is connected to the inlet of the first basic polymer metering pump, and the outlet of the first basic polymer metering pump is connected to the inlet of the premixed screw mixer. Therefore, during the silicone sealant production process, the first basic polymer can be used to pre-treat and modify the low-end powder. The polydimethylsiloxane, as the first basic polymer, has low polarity. In the premixed screw mixer, the polydimethylsiloxane and low-quality calcium carbonate can be fully kneaded and dispersed, and the surface of the calcium carbonate can be fully modified. This reduces the polarity of the low-end powder surface and increases its oil absorption value, allowing the quality of the low-end powder to approach that of the high-end powder.
[0033] The connection relationships of the high-end powder input unit, the second basic polymer input unit, the premix screw mixer, the feeder, and the main mixing screw mixer in the continuous production unit of silicone sealant are as follows: the outlet of the high-end powder storage tank is connected to the inlet of the high-end powder metering and conveying device, and the outlet of the high-end powder metering and conveying device is connected to the inlet of the feeder; the outlet of the second basic polymer storage tank is connected to the inlet of the second basic polymer metering pump, the outlet of the second basic polymer metering pump is connected to the inlet of the feeder, and the outlet of the premix screw mixer is connected to the inlet of the feeder. The feeder's outlet is connected to the main mixing screw mixer's inlet; thus, during the silicone sealant production process, the low-end powder, high-end powder, and the first and second base polymers, which have undergone modification treatment in the premixing screw mixer, can be fed into the main mixing screw mixer for production. Because the low-end powder has been modified by the premixing screw mixer, it is effectively mixed and ground by the main mixing screw mixer, improving the quality of the produced silicone sealant and making it less prone to producing particulate matter. Therefore, no additional filtration device is needed before proceeding to the next process, reducing equipment costs.
[0034] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. A continuous production apparatus for silicone sealant, characterized in that, include: The system includes a low-end powder input unit, a first basic polymer input unit, a premix screw mixer, a high-end powder input unit, a second basic polymer input unit, a feeder, and a main mixing screw mixer. The low-end powder input unit is connected to the feed inlet of the premixed screw mixer, and the first basic polymer input unit is connected to the feed inlet of the premixed screw mixer. The discharge port of the premixed screw mixer is connected to the inlet of the feeder; The high-end powder input unit is connected to the feed inlet of the feeder, and the second basic polymer input unit is connected to the feed inlet of the feeder. The discharge port of the feeder is connected to the inlet of the main screw mixer.
2. The continuous production apparatus for silicone sealant according to claim 1, characterized in that, The low-end powder input unit includes a low-end powder storage tank and a low-end powder metering pump; The outlet of the low-end powder storage tank is connected to the inlet of the low-end powder metering pump, and the outlet of the low-end powder metering pump is connected to the inlet of the premixed screw mixer.
3. The continuous production apparatus for silicone sealant according to claim 1, characterized in that, The first basic polymer input unit includes a first basic polymer storage tank and a first basic polymer metering pump; The outlet of the first basic polymer storage tank is connected to the inlet of the first basic polymer metering pump, and the outlet of the first basic polymer metering pump is connected to the inlet of the premixed screw mixer.
4. The continuous production apparatus for silicone sealant according to claim 1, characterized in that, The high-end powder input unit includes a high-end powder storage tank and a high-end powder metering pump; The outlet of the high-end powder storage tank is connected to the inlet of the high-end powder metering pump, and the outlet of the high-end powder metering pump is connected to the inlet of the feeder.
5. A continuous production apparatus for silicone sealant according to claim 3, characterized in that, The second basic polymer input unit includes a second basic polymer storage tank and a second basic polymer metering pump; The outlet of the second basic polymer storage tank is connected to the inlet of the second basic polymer metering pump, and the outlet of the second basic polymer metering pump is connected to the inlet of the feeder.
6. A continuous production apparatus for silicone sealant according to claim 5, characterized in that, The first basic polymer metering pump is selected from a twin-screw metering pump, and the second basic polymer metering pump is selected from a single-screw metering pump.
7. A continuous production apparatus for silicone sealant according to claim 6, characterized in that, The single-screw metering pump is selected from horizontal single-screw metering pumps.
8. A continuous production apparatus for silicone sealant according to claim 6, characterized in that, The twin-screw metering pump is selected from horizontal twin-screw metering pumps.
9. A continuous production apparatus for silicone sealant according to claim 1, characterized in that, The low-end powder metering and conveying device and the high-end powder metering and conveying device are selected from mechanical metering and conveying devices or pneumatic metering and conveying devices.
10. A continuous production apparatus for silicone sealant according to claim 1, characterized in that, The premixed screw mixer and the main mixing screw mixer are selected from single screw mixers or twin screw mixers.