Quick-release silica gel mold

Abstract

The application discloses a quick-release silica gel mold, which comprises a fixed mold and a movable mold; one side of the fixed mold is provided with a mounting gap; a silica gel runner system is detachably connected in the mounting gap; the silica gel runner system comprises quick-release positioning blocks, cylinder mounting positioning plates, upper silica gel feeding runner plates, lower silica gel feeding runner plates, fixed mold plates and heat insulation plates which are sequentially arranged from top to bottom; and a feeding channel is formed between the upper silica gel feeding runner plates and the lower silica gel feeding runner plates. The silica gel runner system can be quickly released by being detachably connected on the fixed mold, so that the silica gel inside the silica gel runner system is convenient to clean; meanwhile, the feeding channel adopts a 3D printing random-shaped channel, and the front end of the cylinder valve needle system is provided with a double-helix cooling circulation system, so that the cooling surface area and the cooling efficiency are increased, the special requirements of special cooling equipment such as an ice water machine are not needed in the production process, and the possibility of silica gel solidification in the silica gel runner system is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of silicone mold technology, and in particular to a quick-release silicone mold. Background Technology

[0002] Quick-release silicone molds are crucial components in silicone mold making. The smoothness of silicone injection and the ease of cleaning after curing directly impact the stability of silicone product injection production and the routine maintenance after mold removal. Silicone is a thermosetting material, unlike thermoplastics. Silicone does not require heating within the mold runner system; instead, it needs cooling, even ice water cooling. However, once inside the mold cavity, it needs to be heated to above its glass transition temperature within a short time to cure. Therefore, the overall requirement is that the mold needs to cure at room temperature (23℃) or even low temperatures (-5~0℃) within the runner, and at high temperatures (150~200℃) within the cavity. Due to the rapid alternation of heat and cold in injection molding, silicone mold design must carefully consider preventing heat conduction to the mold runner at the points of rapid temperature change. Current solutions to these problems include the following:

[0003] (1) Optimize the silicone runner cooling system, increase the number of cooling water channels and reduce the temperature of ice water, so as to reduce the surface temperature of quick-release silicone mold through heat conduction.

[0004] (2) Add mica heat insulation plates with low thermal conductivity to the mold frame on both sides of the silicone runner to fully isolate the low temperature of the silicone runner from the high temperature of the cavity and reduce heat conduction.

[0005] The solution of increasing the number of cooling water channels and lowering the temperature makes it difficult to raise the temperature inside the mold cavity to the required temperature. This also leads to uneven distribution of curing temperature inside the cavity, and problems such as localized low temperature causing the silicone to not cure or have an excessively long curing cycle. If the cavity continues to be heated, the temperature inside the runner will rise further, causing the silicone to cure inside the runner, resulting in abnormal injection molding and low yield and cycle efficiency.

[0006] While adding heat insulation plates to the mold frame can effectively reduce heat transfer efficiency, the current heat insulation plates have low load-bearing capacity. After the mold is closed, the load-bearing plate may crack, causing the mold life to not meet production requirements. Therefore, mold steel pads are generally added during mold design. The addition of pads further increases the thermal conductivity, causing the silicone in the flow channel to solidify.

[0007] Whether it's increasing the number of cooling water channels and lowering the water temperature, or adding heat insulation plates at the mold frame, both solutions share the common problem of silicone easily curing in the silicone runner system and being difficult to clean.

[0008] Therefore, it is necessary to design a quick-release silicone mold to solve the above problems. Summary of the Invention

[0009] The purpose of this invention is to address the shortcomings of existing technologies by proposing a quick-release silicone mold.

[0010] The technical solution of this invention is: a quick-release silicone mold, comprising a fixed mold and a moving mold; a mounting notch is provided on one side of the fixed mold; a silicone flow channel system is detachably connected within the mounting notch; the silicone flow channel system includes, from top to bottom, a quick-release positioning block, a cylinder mounting positioning plate, an upper silicone inlet flow channel plate, a lower silicone inlet flow channel plate, a fixed template, and a heat insulation plate; an inlet channel is formed between the upper and lower silicone inlet flow channel plates; a silicone inlet nozzle block is provided on one side of the upper and lower silicone inlet flow channel plates; a silicone inlet nozzle communicating with the inlet channel is provided on the silicone inlet nozzle block; a cylinder valve needle system penetrating the fixed template is fixed inside the cylinder mounting positioning plate; the cylinder valve needle system is connected to the outlet of the inlet channel; the inlet channel is a 3D printed conformal channel; a double-spiral cooling circulation system is provided at the front end of the cylinder valve needle system.

[0011] The surface of the adhesive inlet channel is coated with an amorphous silicon oxynitride layer.

[0012] The cylinder valve needle system includes a valve needle cylinder body, a valve needle, and a valve needle bushing; the valve needle cylinder body is installed inside the cylinder mounting and positioning plate, and its bottom end extends out of the upper silicone glue inlet channel plate; the valve needle bushing is sealed and connected to the outlet of the glue inlet channel on the lower silicone glue inlet channel plate; the valve needle is fixed on the piston rod of the valve needle cylinder body and extends into the valve needle bushing.

[0013] The double-helix cooling circulation system includes a double-helix cooling channel located outside the cylinder valve needle system and a cooling water jacket sleeved outside the double-helix cooling channel; the inlet and outlet of the cooling water jacket are sealed with a sealing ring.

[0014] The cylinder valve needle system is equipped with a heat insulation cap at its end.

[0015] The heat-insulating cap is made of titanium alloy.

[0016] The present invention has the following beneficial effects by adopting the above technical solution: (1) The present invention has a detachable connection of silicone flow channel system on the fixed mold, which makes the silicone flow channel system quick to disassemble, thereby facilitating the cleaning of the silicone cured inside. At the same time, the glue inlet channel adopts a 3D printed conformal channel, and is equipped with a double spiral cooling circulation system at the front end of the cylinder valve needle system, which increases the cooling surface area and cooling efficiency. During the production process, there is no need to use special cooling equipment such as ice water, which reduces the manufacturing cost and greatly reduces the possibility of silicone curing in the silicone flow channel system.

[0017] (2) The present invention provides an amorphous silicon oxynitride coating on the surface of the glue inlet channel, which can increase the flow efficiency of silicone and reduce silicone residue on the inner wall of the glue inlet channel.

[0018] (3) The present invention uses a cylinder valve needle system to control the silicone injection, which not only ensures the stability of silicone injection, but also facilitates the installation of the double spiral cooling circulation system.

[0019] (4) The present invention uses a double spiral cooling circulation system to cool the cylinder valve needle system, resulting in better cooling effect.

[0020] (5) The present invention provides a heat insulation cap at the end of the cylinder valve needle system to prevent heat transfer between the moving mold and the silicone flow channel system, and further avoids silicone curing.

[0021] (6) The heat insulation cap of the present invention is made of titanium alloy, which not only has low thermal conductivity, but is also more pressure resistant, thus ensuring the structural stability of the heat insulation cap. Attached Figure Description

[0022] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0023] Figure 1 This is a schematic diagram of the structure of the present invention.

[0024] Figure 2 This is a schematic diagram of the silicone flow channel system of the present invention.

[0025] Figure 3 This is a schematic diagram of the adhesive inlet channel of the present invention.

[0026] Figure 4 This is a schematic diagram of the installation structure of the cylinder valve needle system of the present invention.

[0027] Figure 5 This is a schematic diagram of the cylinder valve needle system of the present invention.

[0028] Figure 6 This is a broken view of the cylinder valve needle system of the present invention.

[0029] The labels in the attached diagram are:

[0030] 1. Fixed mold, 1-1. Mounting notch, 2. Moving mold, 3. Silicone runner system, 3. Quick-release positioning block, 3-1. Cylinder mounting positioning plate, 3-2. Upper silicone inlet runner plate, 3-3. Lower silicone inlet runner plate, 3-4. Fixed mold plate, 3-5. Heat insulation plate, 3-6. Inlet channel, 3-7. Silicone inlet nozzle block, 3-8. Silicone inlet nozzle, 3-9. Sealing ring, 3-10. Cylinder valve needle system, 4. Valve needle cylinder body, 4-1. Valve needle, 4-2. Valve needle bushing, 4-3. Heat insulation cap, 4-4. Double spiral cooling circulation system, 5. Double spiral cooling channel, 5-1. Cooling water jacket, 5-2. Detailed Implementation

[0031] (Example 1)

[0032] See Figures 1 to 6 This embodiment of a quick-release silicone mold includes a fixed mold 1 and a moving mold 2; one side of the fixed mold 1 is provided with an installation notch 1-1; a silicone flow channel system 3 is detachably connected to the installation notch 1-1; the silicone flow channel system 3 includes, from top to bottom, a quick-release positioning block 3-1, a cylinder mounting positioning plate 3-2, an upper silicone inlet flow channel plate 3-3, a lower silicone inlet flow channel plate 3-4, a fixed mold plate 3-5, and a heat insulation plate 3-6; an inlet channel 3-7 is formed between the upper silicone inlet flow channel plate 3-3 and the lower silicone inlet flow channel plate 3-4; the upper silicone inlet flow channel plate 3-3 and the lower silicone inlet flow channel plate 3-4 form an inlet channel 3-7; the upper silicone inlet flow channel plate 3-3 and the lower silicone inlet flow channel plate 3-4 form an inlet channel 3-7; the upper silicone inlet flow channel plate 3-3 and the lower silicone inlet flow channel plate 3-4 form an inlet channel 3-7; the upper silicone inlet flow channel plate 3-3 and the lower silicone inlet flow channel plate 3-4 form an inlet channel 3-7; the upper silicone inlet flow channel plate 3-3 and the lower silicone inlet flow channel plate 3-4 form an inlet channel 3-7; the lower ... lower silicone inlet flow channel plate 3-3 and the lower silicone inlet flow channel plate 3-4 form an inlet channel 3-7; the lower silicone inlet flow channel plate 3-3 and the lower A silicone injection nozzle block 3-8 is provided on one side of the lower silicone injection channel plate 3-4; the silicone injection nozzle block 3-8 is provided with a silicone injection nozzle 3-9 that communicates with the injection channel 3-7; a cylinder valve needle system 4 that penetrates the template 3-5 is fixed inside the cylinder mounting positioning plate 3-2; the cylinder valve needle system 4 is connected to the outlet of the injection channel 3-7, and a sealing ring 3-10 is provided inside the injection channel to ensure the sealing of the injection channel 3-7; the injection channel 3-7 is a 3D printed conformal channel; a double spiral cooling circulation system 5 is provided at the front end of the cylinder valve needle system 4.

[0033] Furthermore, the surface of the glue inlet channel 3-7 is provided with an amorphous silicon oxynitride coating, which can increase the flow efficiency of silicone and reduce silicone residue on the inner wall of the glue inlet channel.

[0034] Furthermore, the cylinder valve needle system 4 includes a valve needle cylinder body 4-1, a valve needle 4-2, and a valve needle bushing 4-3; the valve needle cylinder body 4-1 is installed inside the cylinder mounting positioning plate 3-2, and its bottom end extends out of the upper silicone glue inlet channel plate 3-3 in a sealed manner; the valve needle bushing 4-3 is sealed and connected to the outlet of the glue inlet channel 3-7 on the lower silicone glue inlet channel plate 3-4; the valve needle 4-2 is fixed on the piston rod of the valve needle cylinder body 4-1 and extends into the valve needle bushing 4-3. The present invention uses a cylinder valve needle system 4 to control the glue inlet of silicone, which not only ensures the stability of silicone glue inlet, but also facilitates the installation of the double spiral cooling circulation system 5.

[0035] Furthermore, the double-helix cooling circulation system 5 includes a double-helix cooling channel 5-1 located outside the cylinder valve needle system 4 and a cooling water jacket 5-2 sleeved outside the double-helix cooling channel 5-1; the inlet and outlet of the cooling water jacket 5-2 are sealed with sealing rings to ensure airtightness. This invention uses the double-helix cooling circulation system 5 to cool the cylinder valve needle system 4, resulting in better cooling performance.

[0036] Furthermore, the cylinder valve needle system 4 is provided with a heat insulation cap 4-4 at its end to prevent heat transfer between the moving mold 2 and the silicone flow channel system 3, thereby further preventing silicone curing. Preferably, the heat insulation cap 4-4 is made of titanium alloy, which has low thermal conductivity and is more pressure resistant, ensuring the structural stability of the heat insulation cap 4-4; it can also be replaced with a high-pressure, high-temperature resistant heat insulation resin according to actual requirements, which can also achieve the required heat insulation.

[0037] Preferably, the heat insulation plates 3-6 are made of titanium alloy to further reduce heat transfer between the silicone runner system 3 and the moving mold.

[0038] The quick-release silicone mold of this embodiment is preferably a two-color mold, but it can also be a three-color mold. Its silicone injection method can also be designed to inject silicone through the main central axis, and its silicone injection system can be optimized by corresponding structural changes.

[0039] The quick-release silicone mold of the present invention has a silicone flow channel system 3 that can be detachably connected to the fixed mold 1, so that the silicone flow channel system 3 can be quickly disassembled, thereby facilitating the cleaning of the cured silicone inside and standardized mold change operations. At the same time, the glue inlet channel 3-7 adopts a 3D printed conformal channel, and is equipped with a double spiral cooling circulation system 5 at the front end of the cylinder valve needle system 4, which increases the cooling surface area and cooling efficiency. The special requirements of using special cooling equipment such as ice water are not required during the production process, reducing manufacturing costs, and at the same time significantly reducing the possibility of silicone curing in the silicone flow channel system 3.

[0040] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A quick-release silicone mold, characterized in that: The system includes a fixed mold (1) and a moving mold (2); one side of the fixed mold (1) is provided with an installation notch (1-1); a silicone runner system (3) is detachably connected to the installation notch (1-1); the silicone runner system (3) includes, from top to bottom, a quick-release positioning block (3-1), a cylinder mounting positioning plate (3-2), an upper silicone inlet runner plate (3-3), a lower silicone inlet runner plate (3-4), a fixed mold plate (3-5), and a heat insulation plate (3-6); an inlet channel (3-7) is formed between the upper silicone inlet runner plate (3-3) and the lower silicone inlet runner plate (3-4); a silicone inlet nozzle block (3-8) is provided on one side of the upper silicone inlet runner plate (3-3) and the lower silicone inlet runner plate (3-4); a silicone inlet nozzle (3-9) communicating with the inlet channel (3-7) is provided on the silicone inlet nozzle block (3-8); the cylinder mounting... A cylinder valve needle system (4) is fixed inside the positioning plate (3-2) and extends through the template (3-5); the cylinder valve needle system (4) is connected to the outlet of the glue inlet channel (3-7); the glue inlet channel (3-7) is a 3D printed conformal channel; the front end of the cylinder valve needle system (4) is provided with a double spiral cooling circulation system (5); the cylinder valve needle system (4) includes a valve needle cylinder body (4-1), a valve needle (4-2) and a valve needle bushing (4-3); the valve needle cylinder body (4-1) is installed inside the cylinder mounting positioning plate (3-2) and its bottom end is sealed and extends out of the upper silicone glue inlet channel plate (3-3); the valve needle bushing (4-3) is sealed and connected to the outlet of the glue inlet channel (3-7) on the lower silicone glue inlet channel plate (3-4); the valve needle (4-2) is fixed on the piston rod of the valve needle cylinder body (4-1) and extends into the valve needle bushing (4-3).

2. The quick-release silicone mold according to claim 1, characterized in that: The surface of the adhesive inlet channel (3-7) is provided with an amorphous silicon oxynitride coating.

3. The quick-release silicone mold according to claim 1, characterized in that: The double-helix cooling circulation system (5) includes a double-helix cooling channel (5-1) located outside the cylinder valve needle system (4) and a cooling water jacket (5-2) sleeved outside the double-helix cooling channel (5-1); the inlet and outlet of the cooling water jacket (5-2) are sealed with a sealing ring.

4. The quick-release silicone mold according to claim 1, characterized in that: The cylinder valve needle system (4) is provided with a heat insulation cap (4-4) at its end.

5. A quick-release silicone mold according to claim 4, characterized in that: The heat insulation cap (4-4) is made of titanium alloy.

Images