Cold runner mechanism of liquid silicone mold

Abstract

The utility model discloses a liquid silica gel mold cold runner mechanism which comprises a flow guide plate for shunting liquid silica gel and a runner on the flow guide plate, the runner is distributed in an I shape, the middle section of the runner is provided with a gel inlet penetrating through the flow guide plate, and cooling structures are arranged at the end points of the runner. The top of the cooling structure is provided with a glue outlet, the glue outlet is communicated with the end point of the runner, and liquid silica gel flows in from the glue inlet, is shunted by the runner, passes through the cooling structure and then is ejected out from the glue outlet in the top of the cooling structure. The I-shaped runner design effectively improves the liquidity of the liquid silica gel and ensures the uniformity of product quality, and the silica gel inlet is directly connected with the middle section of the runner, so that the inflow speed of the liquid silica gel is increased, the forming period is shortened, and the production efficiency is improved. And due to the arrangement of the cooling structure, the liquid silica gel reaches a proper temperature before being ejected, silica gel curing is prevented, and the product quality is further guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of silicone molds, in particular to a cold runner mechanism for liquid silicone molds. Background Art

[0002] In the field of liquid silicone molding, the cold runner mechanism of the mold plays a crucial role. There are certain limitations in the design and function of the traditional cold runner mechanism for liquid silicone molds. The traditional cold runner mechanism for liquid silicone molds often adopts a relatively simple runner design, which results in a relatively large flow resistance in the runner when injecting liquid silicone into the mold, and the flow velocity of the liquid silicone is not uniform enough, thus affecting the filling efficiency and molding quality of the mold. During the molding process of liquid silicone, the temperature needs to be precisely controlled to ensure the stability of its fluidity and the quality after molding. However, the traditional cold runner mechanism has difficulties in temperature control, often resulting in uneven temperature distribution inside the mold, thereby affecting the molding effect of liquid silicone. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art solutions, the utility model provides a cold runner mechanism for liquid silicone molds, which can effectively solve the problems of uneven flow velocity of liquid silicone and uneven temperature after splitting flow proposed in the background art.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a cold runner mechanism for liquid silicone molds, including a deflector for splitting liquid silicone and runners on the deflector. The runners are distributed in a "work" shape. A glue inlet penetrating the deflector is arranged in the middle section of the runner, and cooling structures are arranged at the end points of the runner. An outlet is arranged at the top of the cooling structure, and the outlet is communicated with the end points of the runner. Liquid silicone flows in from the glue inlet, is split by the runner, passes through the cooling structure, and is ejected from the outlet at the top of the cooling structure.

[0005] Preferably, the cooling structure includes a cold core and a water pipe communicating with the cold core. The water pipe connects the cold cores in series, and flowing water flows into the cold core from the water pipe to absorb the heat of the liquid silicone.

[0006] Preferably, the cold core is provided with an outer sleeve, the outer sleeve wraps the cold core, and a fixing sleeve is arranged at the bottom of the outer sleeve. The fixing sleeve is connected to the outer sleeve through a fastening bolt.

[0007] Preferably, a heat insulation cap is arranged at the top of the cold core, and the heat insulation cap is arranged at the connection between the cold core and the outer sleeve.

[0008] Preferably, a sealing ring is arranged at the gap at the connection between the heat insulation cap and the outer sleeve.

[0009] Preferably, the sealing ring at least comprises one of a neoprene rubber ring, a nitrile rubber ring, an ethylene propylene diene monomer rubber ring, and a fluororubber ring.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows: The cold runner mechanism of this liquid silicone mold effectively improves the fluidity of liquid silicone through the "I"-shaped runner design, ensuring the uniformity of product quality. The inlet is directly connected to the middle section of the runner, accelerating the inflow speed of liquid silicone, shortening the molding cycle, and improving production efficiency. The setting of the cooling structure enables the liquid silicone to reach an appropriate temperature before injection to prevent curing, further ensuring product quality. The optimized design reduces material loss and production costs, contributing to enhancing the economic benefits and market competitiveness of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is the three-dimensional structure of the present utility model Figure 1 ;

[0012] Figure 2 is the three-dimensional structure of the present utility model Figure 2 ;

[0013] Figure 3 is the top view of the structure of the present utility model;

[0014] Figure 4 is the sectional view of the structure of the present utility model;

[0015] Figure 5 is the front view of the structure of the present utility model;

[0016] Figure 6 is the left view of the structure of the present utility model.

[0017] Reference numerals in the figures:

[0018] 1 - deflector, 2 - runner, 3 - fixing sleeve, 4 - fastening bolt, 5 - cooling structure, 6 - glue outlet, 7 - water pipe, 8 - glue inlet, 51 - outer sleeve, 52 - cold core, 53 - sealing ring, 54 - heat insulation cap. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following describes the embodiments of the present disclosure in detail with reference to the accompanying drawings.

[0020] The following describes the embodiments of the present disclosure through specific examples, and those skilled in the art can easily understand the other advantages and effects of the present disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. The present disclosure can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present disclosure without creative efforts belong to the scope of protection of the present disclosure. Embodiment

[0021] As Figures 1-6 shown, the present utility model provides a cold runner 2 mechanism for a liquid silicone mold, including a deflector plate 1 for diverting liquid silicone and a runner 2 on the deflector plate 1. The runner 2 is distributed in a "work" shape. An injection port 8 penetrating the deflector plate 1 is provided in the middle section of the runner 2. Cooling structures 5 are provided at the end points of the runner 2. An ejection port 6 is provided at the top of the cooling structure 5. The ejection port 6 is communicated with the end points of the runner 2. Liquid silicone flows in from the injection port 8, is diverted through the runner 2, passes through the cooling structure 5, and then is ejected from the ejection port 6 at the top of the cooling structure 5.

[0022] The runner 2 is distributed in a "work" shape, which enables the liquid silicone to be evenly diverted in the runner 2, ensuring that each injection point can obtain sufficient silicone. An injection port 8 penetrating the deflector plate 1 is provided in the middle section of the runner 2. Liquid silicone enters the runner 2 from here and starts its flow and injection process.

[0023] Cooling structures 5 are provided at the end points of the runner 2 to cool the fluid in the runner 2 through the circulation of water, ensuring that the liquid silicone has appropriate temperature and fluidity when flowing to the ejection port 6. An ejection port 6 is provided at the top of the cooling structure 5. After flowing through the cooling structure 5, the temperature of the liquid silicone decreases and its fluidity is further controlled, and then it is ejected from the ejection port 6 and enters the mold cavity.

[0024] The design of the cooling structure 5 effectively controls the temperature of the liquid silicone, enabling it to maintain good fluidity and curing effect during the injection process, and further improving the quality of the product.

[0025] Through this cold runner 2 mechanism, rapid and precise injection of liquid silicone can be achieved, improving production efficiency and the qualified rate of products.

[0026] See Figure 1 and Figure 4, the temperature reduction structure 5 includes a cold core 52 and a water pipe 7 connected to the cold core 52. The water pipe 7 connects the cold cores 52 in series, and the flowing water enters the cold core 52 from the water pipe 7 to absorb the heat of the liquid silicone.

[0027] The core function of the temperature reduction structure 5 is to absorb the heat of the liquid silicone through the flow of water, thereby reducing the temperature of the liquid silicone. This helps to maintain the stability of the liquid silicone during the flow and injection molding processes, ensuring that it has appropriate fluidity and curing effect when entering the mold cavity.

[0028] By controlling the temperature of the liquid silicone, the deformation and shrinkage of the product can be reduced, and the dimensional accuracy and appearance quality of the product can be improved.

[0029] The temperature reduction structure 5 can quickly reduce the temperature of the liquid silicone to the required range, thereby shortening the molding cycle and improving production efficiency.

[0030] See Figure 2 and Figure 4 , the cold core 52 is provided with an outer jacket 51. The outer jacket 51 wraps around the cold core 52, and a fixing sleeve 3 is provided at the bottom of the outer jacket 51. The fixing sleeve 3 is connected to the outer jacket 51 through a fastening bolt 4.

[0031] The outer jacket 51 wraps around the outside of the cold core 52, playing a role of heat preservation and insulation, ensuring that the cooling effect is more stable. When the liquid silicone flows in the runner 2, it absorbs heat through the cold core 52, and the outer jacket 51 helps to maintain this low-temperature state, enabling the liquid silicone to be fully cooled when flowing through the temperature reduction structure 5.

[0032] A fixing sleeve 3 is provided at the bottom of the outer jacket 51 and is connected to the outer jacket 51 through a fastening bolt 4, ensuring the stable fixation of the cold core 52 in the mold and preventing displacement or deformation caused by factors such as pressure and vibration during the injection molding process.

[0033] The design of the fastening bolt 4 makes the installation of the outer jacket 51 and the cold core 52 more convenient and fast. And when it is necessary to clean, repair or replace the cold core 52, only need to loosen the fastening bolt 4 to easily disassemble the outer jacket 51, improving the convenience of maintenance.

[0034] The existence of the outer jacket 51 can protect the cold core 52 from direct erosion of the external environment, helping to extend the service life of the cold core 52 and reducing damage or failures caused by environmental factors.

[0035] See Figure 4 , a heat insulation cap 54 is provided at the top of the cold core 52. The heat insulation cap 54 is arranged at the connection between the cold core 52 and the outer jacket 51.

[0036] The heat insulation cap 54 is provided at the connection between the cold core 52 and the outer jacket 51. Its main function is to isolate the direct contact between the cold core 52 and the external environment, reduce the influence of external heat on the cold core 52, and ensure that the temperature inside the cold core 52 remains relatively low.

[0037] The heat insulation cap 54 is made of a material with good heat insulation performance, which can effectively reduce heat transfer, improve the cooling effect, reduce stress changes caused by temperature changes, and thus reduce deformation or damage of the cold core 52 and the outer jacket 51.

[0038] See Figure 4 , and a sealing ring 53 is provided in the gap at the connection between the heat insulation cap 54 and the outer jacket 51.

[0039] The sealing ring 53 ensures that the gap at the connection between the heat insulation cap 54 and the outer jacket 51 is effectively sealed, preventing liquid silicone or other media from leaking out of the gap under high pressure or high temperature, which can avoid waste of materials and ensure the continuity of the production process.

[0040] In addition, it can also prevent the sudden ejection of liquid silicone under high temperature and high pressure, thus protecting the safety of operators.

[0041] Among them, the sealing ring 53 at least includes one of a neoprene rubber ring, a nitrile rubber ring, an ethylene propylene diene monomer rubber ring, and a fluororubber ring.

[0042] Due to its characteristics such as oil resistance, anti-aging, and wear resistance, it is widely used in the manufacture of mechanical seals and rubber products. In the cold runner 2 mechanism of the liquid silicone mold, it can provide good sealing performance and durability.

[0043] The nitrile rubber ring is particularly suitable for oil-resistant environments, such as hydraulic and pneumatic systems. In the cold runner 2 mechanism of the liquid silicone mold, it can ensure the sealing effect in an oily medium.

[0044] The ethylene propylene diene monomer rubber ring has excellent oxidation resistance and anti-aging properties, and is suitable for environments that require long-term use. It can provide stable sealing performance and extend the service life of the sealing ring 53.

[0045] The fluororubber ring is particularly suitable for high-temperature, high-pressure, and strongly corrosive environments. In the cold runner 2 mechanism of the liquid silicone mold, it can ensure the sealing reliability under extreme conditions.

[0046] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "middle", "length", "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0047] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. The meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0048] In the present utility model, unless otherwise clearly specified and defined, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or capable of communicating with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0049] The above is only to illustrate the embodiments of the present utility model and is not used to limit the present utility model. For those skilled in the art, any modifications, equivalent replacements, improvements, etc. made without creative efforts within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A cold runner mechanism for a liquid silicone mold, comprising a guide plate for diverting liquid silicone and a runner on the guide plate, characterized in that: The flow channel is distributed in an "I" shape, and a glue inlet penetrating the guide plate is arranged in the middle section of the flow channel. Cooling structures are arranged at the end points of the flow channel. A glue outlet is arranged on the top of the cooling structure, and the glue outlet is connected with the end points of the flow channel. Liquid silicone flows into the glue inlet from the glue inlet, is diverted through the flow channel, passes through the cooling structure, and is ejected from the glue outlet on the top of the cooling structure.

2. A liquid silicone mold cold runner mechanism according to claim 1, characterized in that: The cooling structure includes a cold core and a water pipe connected to the cold core. The water pipe connects the cold core in series, and flowing water flows from the water pipe into the cold core to absorb the heat of the liquid silica gel.

3. A liquid silicone mold cold runner mechanism according to claim 2, characterized in that: The cold core is provided with an outer jacket, which is wrapped around the cold core. A fixing sleeve is provided at the bottom of the outer jacket, which is connected to the outer jacket via fastening bolts.

4. A liquid silicone mold cold runner mechanism according to claim 3, characterized in that: A heat insulation cap is arranged on the top of the cold core, and the heat insulation cap is arranged at the connection between the cold core and the outer jacket.

5. A liquid silicone mold cold runner mechanism according to claim 4, characterized in that: A sealing ring is provided at the gap at the connection between the heat insulation cap and the outer jacket.

6. A liquid silicone mold cold runner mechanism according to claim 5, characterized in that: The sealing ring at least comprises one of a chloroprene rubber ring, a nitrile rubber ring, an EPDM rubber ring and a fluororubber ring.

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