Liquid silica gel wire preheating device
By designing a liquid silicone wire preheating device, using segmented transition design and heating layer length adjustment, the problem of difficult setting of liquid silicone extruded silicone wire is solved, and rapid vulcanization and setting of liquid silicone wire is achieved, and production efficiency is improved.
Patent Information
- Application Number
- CN202421389420.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-18
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-06-18
AI Technical Summary
It is difficult to shape the liquid silica gel extrusion silicone wire, and the existing technology has not effectively solved this problem.
A liquid silicone wire preheating device is designed, including a preheating chamber, a heating layer and a heat insulation layer. Through a segmented transition design and the length adjustment of the heating layer, rapid vulcanization and setting of the liquid silicone is achieved.
The vulcanization time of liquid silicone wire in the open space is shortened, the rapid setting of silicone wire is promoted, and the production efficiency of silicone wire is improved.
Smart Images
Figure CN222178610U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of silicone wire production devices, and specifically relates to a liquid silicone wire preheating device. Background Art
[0002] Currently, most silicone filaments are extruded from solid silicone. Solid silicone needs to go through a mixing process to mix the silicone base material and other additives before extrusion. Liquid silicone has a simple production process and can be directly extruded without mixing. However, the technology of using liquid silicone to extrude silicone filaments is not mature, and it is difficult to shape silicone filaments using liquid silicone. Utility Model Content
[0003] The utility model aims at the above-mentioned problems, makes up for the deficiencies of the prior art, and provides a liquid silicone wire preheating device; the utility model can facilitate the rapid shaping of the silicone wire and solve the problem that it is difficult to shape the silicone wire when liquid silicone is extruded.
[0004] To achieve the above purpose, the utility model adopts the following technical solutions.
[0005] The utility model provides a liquid silicone wire preheating device, comprising a preheating chamber, a heating layer and a heat insulating layer, wherein the heating layer is wrapped around the outside of the preheating chamber to heat the material in the preheating chamber, and the heat insulating layer is wrapped around the outside of the heating layer for heat insulation, and is characterized in that a feed port is provided at the feed end of the preheating chamber, and at least one product mold hole is provided at the discharge end of the preheating chamber, and the preheating chamber is divided into a first transition section, a main body section, a second transition section and a discharge mold hole section that are connected from the feed end to the discharge end, the discharge mold hole section corresponds to the product mold hole one by one, and the aperture of the discharge mold hole section is smaller than the aperture of the main body section.
[0006] Furthermore, all of the discharge die hole sections are commonly connected to one second transition section.
[0007] Furthermore, the first transition section and the second transition section are both conical, and the aperture of the main body section is smaller than the aperture of the feed port.
[0008] Furthermore, the heating layer is located outside the main body section, and the length of the heating layer is the product of the flow velocity of the liquid silicone in the main body section and the vulcanization time in the preheating chamber.
[0009] Furthermore, the length of the heat insulation layer is not less than the length of the heating layer.
[0010] Furthermore, the preheating chamber is provided with a thread on the outer wall near the feed end for connection with a feed equipment port, and a hexagonal head for limiting is provided at the end of the thread.
[0011] The beneficial effects of the utility model.
[0012] The inner diameter of the preheating chamber of the utility model is transitioned in sections, so that the vulcanization time of the liquid silicone in the preheating chamber is about 25% of the total vulcanization time, thereby shortening the vulcanization time of the liquid silicone wire in the open space after extrusion, which is conducive to the rapid shaping of the liquid silicone wire. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described here are only used to explain the utility model and are not used to limit the utility model.
[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model when it is a single product mold hole.
[0015] Figure 2 It is a schematic diagram of the side section structure of the utility model when it is a single product mold hole.
[0016] Figure 3 It is a three-dimensional structural schematic diagram of the utility model when there are three product mold holes.
[0017] Figure 4 It is a schematic diagram of the side section structure of the utility model when there are three product mold holes.
[0018] Markings in the figure: 1 is the preheating chamber, 2 is the heating layer, 3 is the insulation layer, 4 is the feed port, 5 is the product die hole, 6 is the first transition section, 7 is the main section, 8 is the second transition section, 9 is the discharge die hole section, and 10 is the hexagonal head. DETAILED DESCRIPTION
[0019] As shown in the accompanying drawings, this embodiment provides a liquid silicone wire preheating device, including a preheating chamber 1, a heating layer 2 and an insulating layer 3. The heating layer 2 is wrapped around the outside of the preheating chamber 1 to heat the material in the preheating chamber 1, and the insulating layer 3 is wrapped around the outside of the heating layer 2 for thermal insulation.
[0020] The feed end of the preheating chamber 1 is provided with a feed port 4, and the discharge end of the preheating chamber 1 is provided with at least one product mold hole 5. The preheating chamber 1 is divided into a connected first transition section 6, a main section 7, a second transition section 8 and a discharge mold hole section 9 from the feed end to the discharge end.
[0021] The length of the discharge die hole section 9 is 3 mm to 5 mm, which is convenient for extrusion and shaping of the product. The discharge die hole sections 9 correspond to the product die holes 5 one by one, and all the discharge die hole sections 9 are connected to a second transition section 8.
[0022] The first transition section 6 and the second transition section 8 are both conical, the aperture of the main section 7 is smaller than the aperture of the feed port 4 , and the aperture of the discharge die hole section 9 is smaller than the aperture of the main section 7 .
[0023] The heating layer 2 is located outside the main section 7. The length of the heating layer 2 is the product of the flow rate of the liquid silicone in the main section 7 and the vulcanization time in the preheating chamber 1. The heating layer 2 adopts electric heating, and the temperature adjustment range is between 50~300℃.
[0024] The length of the heat insulating layer 3 is not less than that of the heating layer 2, and the thickness is about 30 mm. The heat insulating layer 3 plays a role in heat insulation and heat preservation to prevent operators from being scalded.
[0025] The preheating chamber 1 is provided with threads on the outer wall near the feed end for connection with the feed equipment port, the connection method is threaded matching, and a hexagonal head 10 for limiting is provided at the end of the thread to facilitate limiting and operation.
[0026] Example 1
[0027] like Figure 1 and Figure 2 As shown, liquid silicone is used to produce Φ0.5 mm silicone wire, and the preheating chamber 1 is set to a single product die hole 5 for extrusion.
[0028] The diameter of the product mold hole 5 is Φ0.5 mm, the diameter of the main section 7 of the preheating chamber 1 is Φ3.6 mm, and the length of the heating layer 2 is 100 mm.
[0029] The curing temperature of the liquid silicone wire is set to 160°C, the total curing time is 40s, and the curing time of the liquid silicone in the preheating chamber 1 is 10s.
[0030] According to the vulcanization time of the preheating section and the length of the heating section, it can be deduced that the flow velocity of the main section 7 of the preheating chamber 1 is 10mm / s. The area of the main section 7 is about 50 times the area of the die hole, so the flow velocity of the liquid silicone in the preheating chamber 1 is about 1 / 50 of the extrusion velocity, and the extrusion velocity of a single liquid silicone wire is about 0.5m / s when the temperature is 160℃.
[0031] The total length of the preheating chamber 1 is 156mm, the outer contour diameter of the main body is Φ25mm, and the outer contour of the 6mm area at the discharge end transitions from Φ25mm to Φ10.5mm. The outer contour of the 30mm area at the feed end is made into an external thread and a 5mm wide hexagonal head 10, which cooperates with the port nut of the liquid silicone feeding equipment.
[0032] The discharge die hole section 9 of the preheating chamber 1 has a diameter of Φ0.5mm and a length of 3mm to facilitate product shaping; the inner diameter of the main section 7 of the preheating chamber 1 is Φ3.6mm and the length is 120mm, which is 20mm longer than the heating layer 2 to facilitate heating of the raw materials from room temperature to the set temperature; the length of the second transition section 8 between the main section 7 and the discharge die hole section 9 is 3mm, and the length of the first transition section 6 between the feed port 4 and the main section 7 is 30mm.
[0033] The length of the heating layer 2 is 100 mm. The heating layer 2 is electrically heated and has a temperature regulator. The temperature adjustment range is 50°C to 300°C.
[0034] The thickness of the heat insulating layer 3 is 30 mm, and the length is the same as the heating layer 2. The heat insulating layer 3 plays a role of heat insulation and heat preservation to prevent operators from being scalded.
[0035] Example 2
[0036] like Figure 3 and Figure 4 As shown, liquid silicone is used to produce Φ0.5 mm silicone wire, and the preheating chamber 1 is set to three product die holes 5 for extrusion.
[0037] When three product die holes 5 are provided, there are also three discharge die hole sections 9 which are respectively connected to the same second transition section 8 at the same time.
[0038] The size parameters of the device are as follows: the inner diameter of the main section 7 of the preheating chamber 1 is Φ3.6 mm, and the other parameters are the same as those of the single product mold hole 5.
[0039] In addition, when the product mold holes 5 are set to N, the discharge mold hole sections 9 are also N and are respectively connected to the same second transition section 8, the diameter of the main section 7 of the preheating chamber 1 is Φ3.6mm, and other parameters are the same as those of the single product mold hole 5.
[0040] It can be understood that the above specific description of the utility model is only used to illustrate the utility model and is not limited to the technical solution described in the implementation mode of the utility model. Ordinary technicians in the field should understand that the utility model can still be modified or replaced by equivalents to achieve the same technical effect; as long as the use requirements are met, they are within the protection scope of the utility model.
Claims
1. A liquid silicone wire preheating device, comprising a preheating chamber (1), a heating layer (2) and a heat insulating layer (3), wherein the heating layer (2) is wrapped around the outside of the preheating chamber (1) to heat the material in the preheating chamber (1), and the heat insulating layer (3) is wrapped around the outside of the heating layer (2) to provide heat insulation, characterized in that: The feed end of the preheating chamber (1) is provided with a feed port (4), and the discharge end of the preheating chamber (1) is provided with at least one product die hole (5). The preheating chamber (1) is divided into a first transition section (6), a main section (7), a second transition section (8) and a discharge die hole section (9) which are connected from the feed end to the discharge end. The discharge die hole section (9) corresponds to the product die hole (5) one by one, and the aperture of the discharge die hole section (9) is smaller than the aperture of the main section (7).
2. A liquid silicone wire preheating device according to claim 1, characterized in that: All of the discharge die hole sections (9) are commonly connected to one of the second transition sections (8).
3. A liquid silicone wire preheating device according to claim 1, characterized in that: The first transition section (6) and the second transition section (8) are both conical, and the aperture of the main section (7) is smaller than the aperture of the feed port (4).
4. A liquid silicone wire preheating device according to claim 1, characterized in that: The heating layer (2) is located outside the main body section (7), and the length of the heating layer (2) is the product of the flow rate of the liquid silicone in the main body section (7) and the vulcanization time in the preheating chamber (1).
5. The liquid silicone wire preheating device according to claim 1, characterized in that: The length of the heat insulation layer (3) is not less than the length of the heating layer (2).
6. A liquid silicone wire preheating device according to claim 1, characterized in that: The preheating chamber (1) is provided with a thread on the outer wall near the feed end for connection with a feed equipment port, and a hexagonal head (10) for limiting is provided at the end of the thread.