Pouring runner structure of bakelite injection mold
By adopting an internal temperature-controlled runner structure in bakelite injection molds, the problems of complex mold structure and high operation difficulty have been solved, achieving high production efficiency.
Patent Information
- Application Number
- CN202511435006.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-09
- Publication Date
- 2025-12-23
AI Technical Summary
Existing bakelite manufacturing processes involve complex mold structures, require the design of cold runners, are difficult to operate, have low assembly efficiency, and have long production cycles.
The Bakelite injection mold employs a pouring channel structure that eliminates the need for a cold runner, including an inner cylinder, an outer cylinder, an internal temperature-regulating runner, a gate and stop mechanism, and a drive assembly. The internal temperature-regulating runner cools and regulates the temperature of the material, avoiding thermal curing and simplifying the production process.
It simplifies the production process, saves product molding time, and improves production efficiency.
Smart Images
Figure CN121179660A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of bakelite production technology, and in particular to a gating channel structure for a bakelite injection mold. Background Technology
[0002] In existing bakelite manufacturing processes, to prevent premature curing of the material within the runner, a cold runner is machined into the injection mold. The bakelite injection molding machine then fills the product cavity with the raw material through this cold runner. After filling, the bakelite material is heated and cured to form the product. The product is then removed along with the cured material in the cold runner. The cured material in the cold runner is then removed, and the cut marks are trimmed. Existing bakelite manufacturing processes have the following shortcomings: 1. Complex mold structure, requiring the design of a cold runner for product filling; 2. High operational difficulty, due to the complex operation process and the need for operators to perform each action, increasing waste; 3. Low assembly efficiency, due to the complex product filling process and long manufacturing cycle, resulting in low operational efficiency in actual production. Summary of the Invention
[0003] The technical problem to be solved by the present invention is to provide a gating runner structure for a bakelite injection mold that does not require a cold runner.
[0004] To solve the above-mentioned technical problems, the present invention provides a gating runner structure for a bakelite injection mold, comprising: A casting cylinder, comprising an inner cylinder and an outer cylinder, wherein the inner cylinder has a feed inlet at its top end and a discharge outlet at its bottom end, and the outer cylinder is fitted onto the inner cylinder, and an internal temperature regulating channel is provided between the inner cylinder and the outer cylinder. The first water inlet pipe is connected to the input end of the internal temperature regulating channel; The first return water pipe is connected to the output end of the internal temperature regulating channel; The stop mechanism includes a valve needle and a drive assembly. The valve needle is coaxially disposed inside the inner cylinder. The bottom end of the valve needle blocks the discharge port, and the top end of the valve needle extends sealingly out of the top of the inner cylinder. The drive assembly is connected to the top end of the valve needle and can drive the valve needle to move axially along the inner cylinder.
[0005] As a preferred embodiment of the present invention, the internal temperature regulating channel includes a first spiral groove and a second spiral groove respectively disposed on the outer side of the inner cylinder. The first spiral groove and the second spiral groove are arranged in opposite spiral directions. The top end of the first spiral groove is connected to the water inlet pipe. The bottom end of the first spiral groove and the bottom end of the second spiral groove are connected to the bottom of the outer cylinder. The top end of the second spiral groove is connected to the water return pipe.
[0006] As a preferred embodiment of the present invention, an external temperature regulating sleeve is provided on the top of the outer cylinder, and an external temperature regulating cavity is provided inside the external temperature regulating sleeve, which is arranged around the axis of the outer cylinder. The external temperature regulating sleeve is provided with an inlet and an outlet that are respectively connected to the external temperature regulating cavity. The first inlet pipe is connected to the inlet and the input end of the internal temperature regulating channel, and the first outlet pipe is connected to the outlet and the output end of the internal temperature regulating channel.
[0007] As a preferred embodiment of the present invention, the casting cylinder further includes a connecting seat disposed at the top of the inner cylinder. The connecting seat is provided with a water inlet channel, a water return channel, and a material inlet channel. The input end of the water inlet channel is located on one side of the connecting seat and connected to the first water inlet pipe. The output end of the water inlet channel is located at the bottom of the connecting seat and connected to the input end of the internal temperature regulating channel. The water return channel is located on one side of the connecting seat and connected to the first water return pipe. The input end of the material inlet channel is located at the top of the connecting seat. The output end of the material inlet channel is located at the bottom of the connecting seat and connected to the material inlet. The tip of the valve needle extends out of the top of the connecting seat. The driving assembly is installed on the top of the connecting seat.
[0008] As a preferred embodiment of the present invention, an adapter is installed on the top of the connecting seat, and an injection port is provided on the top of the adapter. The adapter has a flow channel and a temperature regulating channel inside. The input end of the flow channel is connected to the injection port, and the output end of the flow channel is located at the bottom of the connecting seat and connected to the input end of the feeding channel. The temperature regulating channel is arranged around the flow channel. The input end of the temperature regulating channel is connected to a second water inlet pipe, and the output end of the temperature regulating channel is connected to a second water return pipe.
[0009] As a preferred embodiment of the present invention, the side of the connecting seat is provided with an inlet water outlet communicating with the inlet channel and a return water outlet communicating with the return water channel. The inlet water outlet is connected to the inlet water outlet through a pipe, and the return water outlet is connected to the return water outlet through a pipe.
[0010] As a preferred embodiment of the present invention, the bottom of the adapter is provided with a mounting groove, the drive assembly includes a drive cylinder, the cylinder body of the drive cylinder is fixedly installed in the mounting groove, and the telescopic shaft of the drive cylinder is connected to the top of the valve needle.
[0011] As a preferred embodiment of the present invention, two feed channels and two flow channels are provided respectively, and the flow channels and the feed channels are connected in a one-to-one correspondence.
[0012] As a preferred embodiment of the present invention, the outer cylinder is provided with a temperature sensor for detecting the temperature of the liquid in the inner temperature regulating channel, and the water temperature in the inner temperature regulating channel is controlled at 80℃-100℃.
[0013] This invention discloses a gating runner structure for a bakelite injection mold. Compared with existing technologies, its advantages are as follows: During casting, the drive assembly moves the valve needle, causing it to separate from the outlet. The material is then conveyed through the inlet to the inner cylinder, then along the inner cylinder, and finally from the outlet to the product cavity. During the material's transport along the inner cylinder, the water in the internal temperature-regulating runner cools and regulates the material, preventing thermal solidification. After the product cavity is filled, the drive assembly moves the valve needle to block the outlet. The water in the internal temperature-regulating runner maintains a temperature-regulating effect on the material in the inner cylinder, keeping it in a flowing state. When filling the product cavity again, the valve needle only needs to be separated from the outlet once more. Because the internal temperature-regulating runner regulates the temperature of the material in the inner cylinder, the material can be directly filled into the product cavity without the need for an additional cold runner, simplifying the production process, saving product molding time, and improving production efficiency. Attached Figure Description
[0014] Figure 1 This is a structural diagram of the present invention; Figure 2 This is a half-sectional perspective view of the present invention; Figure 3 This is another half of the sectional perspective view of the present invention; Figure 4 yes Figure 3 A magnified view of a portion at point A; Figure 5 This is a broken structure diagram of the connection between the first water inlet pipe and the connecting seat of the present invention; Figure 6 This is a diagram showing the fracture structure at the connection between the second water inlet pipe and the adapter of the present invention; Figure 7 This is a connection structure diagram of the connecting seat and the inner cylinder of the present invention; In the figure, there is a casting cylinder 1; an inner cylinder 11; a feed inlet 111; a discharge outlet 112; an outer cylinder 12; an inner temperature regulating channel 13; a first spiral groove 131; a second spiral groove 132; an outer temperature regulating sleeve 14; an outer temperature regulating cavity 141; a water inlet 142; a water return outlet 143; a connecting seat 15; a water inlet channel 151; a water return channel 152; a feed channel 153; a water inlet outlet 154; a water return outlet 155; a first water inlet pipe 2; a first water return pipe 3; a stop / go mechanism 4; a valve needle 41; a drive assembly 42; an adapter seat 5; an injection port 51; a flow channel 52; a temperature regulating channel 53; a mounting groove 54; a second water inlet pipe 6; and a second water return pipe 7. Detailed Implementation
[0015] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.
[0016] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The accompanying drawings more clearly show the internal structure of the connecting seat, with the internal arm of the connecting seat rendered in perspective.
[0017] like Figure 1-7 As shown, a preferred embodiment of the present invention provides a gating runner structure for a bakelite injection mold, comprising: The casting cylinder 1 includes an inner cylinder 11 and an outer cylinder 12. The inner cylinder 11 has a feed inlet 111 at the top and a discharge outlet 112 at the bottom. The outer cylinder 12 is fitted onto the inner cylinder 11. An internal temperature regulating channel 13 is provided between the inner cylinder 11 and the outer cylinder 12. The first water inlet pipe 2 is connected to the input end of the internal temperature regulating channel 13; The first return water pipe 3 is connected to the output end of the internal temperature regulating channel 13; The stop mechanism 4 includes a valve needle 41 and a drive assembly 42. The valve needle 41 is coaxially disposed inside the inner cylinder 11. The bottom end of the valve needle 41 blocks the discharge port 112, and the top end of the valve needle 41 extends out of the top of the inner cylinder 11 in a sealed manner. The drive assembly 42 is connected to the top end of the valve needle 41 and can drive the valve needle 41 to move axially along the inner cylinder 11.
[0018] The working principle of this embodiment is as follows: the first water inlet pipe 2 and the second water inlet pipe 6 are respectively connected to a constant temperature water bath device that can adjust the water temperature, and the outlet 112 is connected to the product cavity; during pouring, the drive assembly 42 drives the valve needle 41 to move, so that the valve needle 41 separates from the outlet 112. At this time, the material (flowing bakelite raw material) is transported into the inner cylinder 11 through the inlet 111, then transported along the inner cylinder 11, and finally transported into the product cavity from the outlet 112. During the process of the material being transported along the inner cylinder 11, the water in the inner temperature regulating channel 13 exchanges heat with the outside of the inner cylinder 11, thereby cooling and regulating the material in the inner cylinder 11 and preventing the material from being poured. Thermal curing occurs; after the product cavity is filled, the drive assembly 42 drives the valve needle 41 to move, causing the valve needle 41 to block the discharge port 112. At this time, the water in the internal temperature regulating channel 13 maintains the temperature of the material in the inner cylinder 11, keeping the material in the inner cylinder 11 in a flowing state. When filling the product cavity again, it is only necessary to separate the valve needle 41 from the discharge port 112 again. Since the internal temperature regulating channel 13 regulates the temperature of the material in the inner cylinder 11, the material in the cylinder can be directly filled into the product cavity without the need for an additional cold runner, which simplifies the production process, saves the product molding time cycle, and improves production efficiency.
[0019] For example, the internal temperature regulating channel 13 includes a first spiral groove 131 and a second spiral groove 132 respectively disposed on the outer side of the inner cylinder 11. The spiral directions of the first spiral groove 131 and the second spiral groove 132 are staggered. The top end of the first spiral groove 131 is connected to the water inlet pipe, and the bottom end of the first spiral groove 131 and the bottom end of the second spiral groove 132 are connected to the bottom of the outer cylinder 12. The top end of the second spiral groove 132 is connected to the water return pipe. That is, the top end of the first spiral groove 131 is the input end of the internal temperature regulating channel 13, and the top end of the second spiral groove 132 is the output end of the internal temperature regulating channel 13. Generally, the top end of the first spiral groove 131 and the top end of the second spiral groove 132 are located on both sides of the inner cylinder 11. After the water in the first water inlet pipe 2 is delivered to the top end of the first spiral groove 131, it flows spirally along the first spiral groove 131 and then to the bottom end of the second spiral groove 132, where it flows spirally along the second spiral groove 132, thereby achieving comprehensive and uniform temperature regulation of the material in the inner cylinder 11.
[0020] For example, an outer temperature regulating sleeve 14 is fitted onto the top of the outer cylinder 12. The outer temperature regulating sleeve 14 has an outer temperature regulating cavity 141 arranged around the axis of the outer cylinder 12. The outer temperature regulating sleeve 14 has an inlet 142 and an outlet 143 respectively connected to the outer temperature regulating cavity 141. In this embodiment, the inlet 142 and the outlet 143 are located on opposite sides of the top of the outer temperature regulating sleeve 14. The first inlet pipe 2 is connected to the inlet 142 and the input end of the inner temperature regulating channel 13, respectively. The first outlet pipe 3 is connected to the outlet 143 and the inner temperature regulating channel 13, respectively. The output end of the flow channel 13 is connected, that is, the water in the first water inlet pipe 2 will be delivered to the water inlet 142 and the input end of the inner temperature regulating flow channel 13 respectively. The water at the return water inlet 143 and the output end of the inner temperature regulating flow channel 13 will be delivered to the first return water pipe 3 respectively, so as to realize the water circulation in the inner temperature regulating flow channel 13 and the outer temperature regulating cavity 141. During the pouring, the temperature of the material at the top of the inner cylinder 11 will be higher than the temperature of the material at the bottom. Therefore, the outer temperature regulating sleeve 14 and the outer temperature regulating cavity 141 are set to regulate and cool the material at the top of the inner cylinder 11.
[0021] For example, the casting cylinder 1 also includes a connecting seat 15 located at the top of the inner cylinder 11. The connecting seat 15 has a water inlet channel 151, a water return channel 152, and a feed channel 153. The input end of the water inlet channel 151 is located on one side of the connecting seat 15 and connected to the first water inlet pipe 2. The output end of the water inlet channel 151 is located at the bottom of the connecting seat 15 and connected to the input end of the inner temperature regulating channel 13. The water return channel 152 is located on one side of the connecting seat 15 and connected to the first water return pipe 3. The feed channel... The input end of the feed channel 153 is located at the top of the connector 15, and the output end of the feed channel 153 is located at the bottom of the connector 15 and connected to the feed port 111. That is, the water in the first water inlet pipe 2 is transported to the input end of the internal temperature regulating channel 13 through the water inlet channel 151, and the water at the output end of the internal temperature regulating channel 13 is transported to the first return water pipe 3 through the return water channel 152, which facilitates assembly and connection. The top end of the valve needle 41 extends out of the top of the connector 15, and the drive assembly 42 is installed on the top of the connector 15.
[0022] For example, an adapter 5 is mounted on the top of the connector 15. The top of the adapter 5 has an injection port 51. The adapter 5 contains a flow channel 52 and a temperature-regulating channel 53. The input end of the flow channel 52 is connected to the injection port 51, and the output end of the flow channel 52 is located at the bottom of the connector 15 and connected to the input end of the feed channel 153. The temperature-regulating channel 53 is arranged around the flow channel 52. In this embodiment, the input and output ends of the temperature-regulating channel 53 are located on both sides of the connector 15, respectively. The input end is connected to the second water inlet pipe 6, and the output end of the temperature regulating channel 53 is connected to the second return water pipe 7. The injection molding machine injects the material into the injection port 51, and then the material is conveyed into the inner cylinder 11 through the flow channel 52 and the feed channel 153 in sequence. The water in the second water inlet pipe 6 is conveyed to the input end of the temperature regulating channel 53 and conveyed around the flow channel 52 along the temperature regulating channel 53 to regulate the temperature of the material in the flow channel 52. Finally, it is conveyed to the second return water pipe 7 through the output end of the temperature regulating channel 53 to realize the circulation of water.
[0023] For example, the side of the connecting seat 15 is provided with an inlet water diversion port 154 communicating with the inlet water channel 151 and a return water diversion port 155 communicating with the return water channel 152. The inlet water diversion port 154 is connected to the inlet water port 142 through a pipe, and the return water diversion port 155 is connected to the return water port 143 through a pipe. That is, the water in the inlet water channel 151 will be diverted to the inlet water port 142 through the inlet water diversion port 154, and then enter the external temperature control chamber 141. The water in the external temperature control chamber 141 will be transported to the return water channel 152 in sequence through the return water port 143 and the return water diversion port 155.
[0024] For example, the bottom of the adapter 5 is provided with an installation groove 54, and the drive assembly 42 includes a drive cylinder. The cylinder body of the drive cylinder is installed and fixed in the installation groove 54. The telescopic shaft of the drive cylinder is connected to the top of the valve needle 41. The telescopic shaft of the drive cylinder is arranged along the axial direction of the inner cylinder 11. The extension and retraction of the telescopic shaft of the drive cylinder can drive the valve needle 41 to move along the axial direction of the inner cylinder 11, thereby causing the bottom end of the valve needle 41 to separate from or block the discharge port 112, thus realizing the opening and closing of the discharge port 112.
[0025] For example, there are two feed channels 153 and two flow channels 52 respectively. The flow channels 52 and the feed channels 153 are connected one-to-one. The raw material at the injection port 51 is diverted to the two flow channels 52 and then transported to the inner cylinder 11 through the corresponding feed channel 153. The material diversion and transportation can help to regulate the temperature of the material.
[0026] For example, the outer cylinder 12 is equipped with a temperature sensor for detecting the temperature of the liquid in the inner temperature regulating channel 13. The water temperature in the inner temperature regulating channel 13 is controlled at 80℃-100℃. The temperature sensor can monitor the water temperature in the inner temperature regulating channel 13 in real time, thereby providing feedback to control the water temperature and keep it at 80℃-100℃. Bakelite raw materials can maintain good fluidity within this range.
[0027] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.
Claims
1. A gating system structure for a bakelite injection mold, characterized in that: include: A casting cylinder, comprising an inner cylinder and an outer cylinder, wherein the inner cylinder has a feed inlet at its top end and a discharge outlet at its bottom end, and the outer cylinder is fitted onto the inner cylinder, and an internal temperature regulating channel is provided between the inner cylinder and the outer cylinder. The first water inlet pipe is connected to the input end of the internal temperature regulating channel; The first return water pipe is connected to the output end of the internal temperature regulating channel; The stop mechanism includes a valve needle and a drive assembly. The valve needle is coaxially disposed inside the inner cylinder. The bottom end of the valve needle blocks the discharge port, and the top end of the valve needle extends sealingly out of the top of the inner cylinder. The drive assembly is connected to the top end of the valve needle and can drive the valve needle to move axially along the inner cylinder.
2. The gating runner structure of the bakelite injection mold according to claim 1, characterized in that: The internal temperature regulating channel includes a first spiral groove and a second spiral groove respectively disposed on the outer side of the inner cylinder. The spiral directions of the first spiral groove and the second spiral groove are staggered. The top end of the first spiral groove is connected to the first water inlet pipe, and the bottom end of the first spiral groove and the bottom end of the second spiral groove are connected to the bottom of the outer cylinder. The top end of the second spiral groove is connected to the first water return pipe.
3. The gating runner structure of the bakelite injection mold according to claim 1, characterized in that: The top of the outer cylinder is fitted with an external temperature regulating sleeve. The interior of the external temperature regulating sleeve is provided with an external temperature regulating cavity arranged around the axis of the outer cylinder. The external temperature regulating sleeve is provided with an inlet and an outlet that are respectively connected to the external temperature regulating cavity. The first inlet pipe is connected to the inlet and the input end of the internal temperature regulating channel. The first outlet pipe is connected to the outlet and the output end of the internal temperature regulating channel.
4. The gating runner structure of the bakelite injection mold according to claim 3, characterized in that: The casting cylinder also includes a connecting seat located at the top of the inner cylinder. The connecting seat has a water inlet channel, a water return channel, and a feed channel. The input end of the water inlet channel is located on one side of the connecting seat and connected to the first water inlet pipe. The output end of the water inlet channel is located at the bottom of the connecting seat and connected to the input end of the internal temperature regulating channel. The water return channel is located on one side of the connecting seat and connected to the first water return pipe. The input end of the feed channel is located at the top of the connecting seat. The output end of the feed channel is located at the bottom of the connecting seat and connected to the feed inlet. The tip of the valve needle extends beyond the top of the connecting seat. The drive assembly is installed on the top of the connecting seat.
5. The gating runner structure of the bakelite injection mold according to claim 4, characterized in that: An adapter is installed on the top of the connector, and an injection port is provided on the top of the adapter. The adapter has a flow channel and a temperature regulating channel inside. The input end of the flow channel is connected to the injection port, and the output end of the flow channel is located at the bottom of the connector and connected to the input end of the feed channel. The temperature regulating channel is arranged around the flow channel. The input end of the temperature regulating channel is connected to a second water inlet pipe, and the output end of the temperature regulating channel is connected to a second water return pipe.
6. The gating runner structure of the bakelite injection mold according to claim 5, characterized in that: The side of the connecting seat is provided with an inlet water outlet communicating with the inlet channel and a return water outlet communicating with the return water channel. The inlet water outlet is connected to the inlet water outlet through a pipe, and the return water outlet is connected to the return water outlet through a pipe.
7. The gating runner structure of the bakelite injection mold according to claim 5, characterized in that: The bottom of the adapter is provided with a mounting groove, the drive assembly includes a drive cylinder, the cylinder body of the drive cylinder is fixedly installed in the mounting groove, and the telescopic shaft of the drive cylinder is connected to the top of the valve needle.
8. The gating runner structure of the bakelite injection mold according to claim 5, characterized in that: The feeding channel and the flow channel are each provided in two lines, and the flow channel and the feeding channel are connected in a one-to-one correspondence.
9. The gating runner structure of the bakelite injection mold according to claim 1, characterized in that: The outer cylinder is equipped with a temperature sensor for detecting the temperature of the liquid in the inner temperature regulating channel, and the water temperature in the inner temperature regulating channel is controlled between 80℃ and 100℃.