CN216127660U - Needle valve type hot runner of injection mold - Google Patents
Needle valve type hot runner of injection mold Download PDFInfo
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- CN216127660U CN216127660U CN202121406098.2U CN202121406098U CN216127660U CN 216127660 U CN216127660 U CN 216127660U CN 202121406098 U CN202121406098 U CN 202121406098U CN 216127660 U CN216127660 U CN 216127660U
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- needle valve
- seat plate
- sliding
- plate
- installation seat
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Abstract
The utility model discloses a needle valve type hot runner of an injection mold, which comprises an installation seat plate and a lead screw pushing-out mechanism, wherein the lead screw pushing-out mechanism comprises a servo motor, a lead screw in transmission connection with the servo motor and a sliding nut seat arranged on the lead screw, and the lead screw and the servo motor are arranged at the front end of the installation seat plate; the utility model discloses a needle valve installation seat plate, including installation seat plate, needle valve mount, inclined slide nut seat, needle valve guide pin, installation seat plate's up end has the sliding frame along fore-and-aft direction sliding connection, the front end and the sliding nut seat of sliding frame are connected, there is the needle valve mount along inclined sliding connection in the sliding frame, along the projection of inclined line segment at the horizontal plane along the fore-and-aft direction, it has the needle valve to set up on the needle valve mount to be used for sealing the runner, vertical uide pin is worn to be equipped with in the activity on the needle valve mount, the lower extreme of uide pin is pegged graft on the installation seat plate. After the needle valve type hot runner is adopted, the pressure maintaining pressure in the forming die is easy to control and adjust.
Description
Technical Field
The utility model relates to the technical field of hot runner structures of injection molds, in particular to a needle valve type hot runner of an injection mold.
Background
The needle valve type hot runner of the existing injection molding machine generally comprises a main runner lining, a sub-runner lining, a needle valve and a flow distribution plate, after the injection molding of each mold cavity is finished, the needle valve is pushed by a cylinder, so that each sub-runner is closed by the needle valve, and the cylinder applies pressure maintaining pressure required by molding to the molten plastic in each mold cavity through the needle valve; the pressure maintaining pressure generated by pushing the needle valve by the cylinder is difficult to adjust, especially cannot be micro-adjusted; after the mould is used for a long time, the inner wall of the runner is inevitably worn or the injection molding material is remained, so that the pressure maintaining pressure during molding is insufficient, and the defect of the molded mould is caused.
Accordingly, the present inventors have conducted extensive studies to solve the above problems and have made the present invention.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a needle valve type hot runner of an injection mold, which is easy to control and adjust the pressure maintaining pressure.
A needle valve type hot runner of an injection mold comprises an installation seat plate and a lead screw pushing-out mechanism, wherein the lead screw pushing-out mechanism comprises a servo motor, a lead screw in transmission connection with the servo motor and a sliding nut seat arranged on the lead screw, and the lead screw and the servo motor are installed at the front end of the installation seat plate; the upper end surface of the installation seat plate is connected with a sliding frame in a sliding mode along the front-back direction, the front end of the sliding frame is connected with a sliding nut seat, a needle valve fixing frame is connected in the sliding frame in a sliding mode, the sliding track of the needle valve fixing frame relative to the sliding frame is inclined from front to back, a guide pin arranged vertically penetrates through the needle valve fixing frame, and the lower end of the guide pin is inserted into the installation seat plate;
a splitter plate is also embedded in the mounting seat plate, a main runner bushing and a plurality of splitter channel bushings are mounted on the splitter plate, and the outlet end of each splitter channel bushing is connected with a sprue nozzle core;
and a plurality of needle valves are arranged on the needle valve mounting frame, and each needle valve is in one-to-one correspondence with each sub-runner bushing.
All install the oblique slide rail that sets up along the slant on the lateral wall of the both sides of needle valve mount, correspond on the inside wall of sliding frame respectively the oblique slide rail is provided with an oblique slider respectively, each slider sliding connection to one side is in corresponding on the oblique slide rail.
The utility model also comprises an upper die seat plate arranged at the bottom of the mounting seat plate, each shunt passage bushing is embedded in the upper die seat plate, the shunt plates are arranged on the upper end surfaces of the shunt passage bushings, and a gap is formed between each shunt plate and the upper die seat plate; each sprue core is sleeved outside the lower end of the corresponding runner bushing.
A slide rail is convexly arranged on the installation seat plate along the front-back direction, the sliding frame is connected to the slide rail in a sliding manner, an upper seat plate is arranged on the installation seat plate in a covering manner, an avoiding groove hole is formed in the bottom of the upper seat plate corresponding to the slide rail, and a square groove for the sliding frame to slide back and forth is formed in the bottom of the upper seat plate; the upper ends of the guide pins are inserted into the upper seat plate, a plurality of abutting pins are arranged at the top of the flow distribution plate, and the upper ends of the abutting pins abut against the upper seat plate.
After the technical scheme is adopted, the servo motor can drive the sliding frame to slide along the front-back direction, and the needle valve fixing frame is connected to the guide pin in a sliding mode along the vertical direction and is connected to the sliding frame in a sliding mode, and the sliding track of the needle valve fixing frame relative to the sliding frame inclines from front to back, so that the sliding frame can drive the needle valve fixing frame to move up and down when sliding along the front-back direction; when the needle valve moves downwards to the sprue position of the sprue nozzle core, the needle valve can seal the outlet of the sprue nozzle core, and pressure maintaining pressure is formed in the molding die cavity, because the rotating speed and the rotating position of the servo motor are easy to accurately control, the sliding quantity of the screw rod pushing mechanism is also easy to accurately and continuously adjust, the moving quantity of the sliding frame is easy to accurately control, the up-and-down moving quantity of the needle valve is also easy to accurately and continuously adjust, further, the pressure maintaining pressure in the molding die is easy to micro-adjust, the larger pressure maintaining pressure can be obtained by increasing the downward moving quantity of the needle valve, after the die is prevented from being used for a long time, the pressure maintaining pressure caused by die loss is insufficient, and the air cylinder cannot be accurately adjusted to the required pressure maintaining pressure.
Drawings
For ease of illustration, the utility model is described in detail by the following detailed description and the accompanying drawings.
FIG. 1 is a schematic view of an injection mold fitted with a needle valve type hot runner of the present invention (upper seat plate omitted);
FIG. 2 is a schematic view of a portion of the needle valve hot runner of the present invention;
FIG. 3 is a schematic diagram of a part of the structure of the needle valve type hot runner and the upper and lower cavities of the injection mold for installing the needle valve type hot runner according to the present invention;
FIG. 4 is a schematic view of a primary flowpath liner and a diverter plate of the present invention;
FIG. 5 is a cross-sectional view of a diverter plate of the present invention;
FIG. 6 is a schematic view of an injection mold fitted with a needle valve style hot runner of the present invention;
FIG. 7 is a cross-sectional view of an injection mold fitted with the needle valve hot runner of the present invention taken along line A-A;
FIG. 8 is a cross-sectional view of an injection mold with a needle valve style hot runner of the present invention installed taken along line B-B;
fig. 9 is a schematic view of an upper seat plate of the present invention.
In the figure:
servo motor-11 screw rod-12
Sliding nut seat-13 sliding frame-14
Inclined slide block-141 mounting seat plate-2
Slide rail-21 main runner bush-31
Splitter plate-32 offset-321
Branch channel-322 needle valve fixing frame-33
Guide pin-331 inclined slide rail-332
Needle valve-333 subchannel bush-34
Sprue nozzle core-35 upper die base plate-4
Upper seat board-5 square groove-51
Avoidance slotted hole-52
Detailed Description
In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following specific examples.
As shown in fig. 1 to 9, a needle valve type hot runner of an injection mold comprises an installation seat plate 2 and a lead screw pushing mechanism, wherein the lead screw pushing mechanism comprises a servo motor 11, a lead screw in transmission connection with the servo motor 11 and a sliding nut seat 13 arranged on the lead screw, and the lead screw and the servo motor 11 are installed at the front end of the installation seat plate 2; after the servo motor 11 is started, the installation and connection mode of the screw rod pushing mechanism is common knowledge, and the details are not repeated herein. In this embodiment, the upper end surface of the installation seat plate 2 is convexly provided with a slide rail 21 along the front-back direction, the slide rail 21 is slidably connected with a slide frame 14, and the front end of the slide frame 14 is installed on the slide nut seat 13; after the servo motor 11 is started, the slide frame 14 can slide in the forward or backward direction.
A needle valve fixing frame 33 capable of moving up and down obliquely in the sliding frame 14 is connected in the sliding frame 14 in a sliding manner, and a sliding track formed by the needle valve fixing frame 33 moving up and down obliquely relative to the sliding frame 14 is arranged in the front-back direction on a projection line of a horizontal plane (namely the sliding track inclines from front to back); in this embodiment, the outer sidewall of one side of the needle valve fixing frame 33 is provided with two inclined slide rails 332, the outer sidewall of the other side of the needle valve fixing frame 33 is also provided with two inclined slide rails 332, each inclined slide rail 332 inclines downwards from front to back, the inner sidewall of the sliding frame 14 is provided with an inclined slider 141 corresponding to each inclined slide rail 332, each inclined slider 141 is connected to the corresponding inclined slide rail 332 in an inclined sliding manner, and the sliding frame 14 and the needle valve fixing frame 33 are connected to the inclined slide rails 332 in an inclined sliding manner through the inclined sliders 141. The needle valve fixing frame 33 is provided with a guide pin 331 which is vertically arranged in a penetrating way, and the lower end of the guide pin 331 is inserted on the installation seat plate 2. The needle valve fixing frame 33 is vertically and slidably connected to the guide pin 331, and when the servo motor 11 drives the sliding frame 14 to slide in the front-back direction, the needle valve fixing frame 33 slides up and down along the guide pin 331 by the oblique sliding between the oblique slider 141 on the sliding frame 14 and the oblique slide rail 332 of the needle valve fixing frame 33, in this embodiment, when the sliding frame 14 slides forward, the needle valve fixing frame 33 slides down.
A splitter plate 32 located below the needle valve fixing frame 33 is further embedded in the mounting seat plate 2, in this embodiment, a main flow channel inlet of the splitter plate 32 is arranged on the upper end surface, and a main flow channel bushing 31 is installed on the upper end surface of the splitter plate 32 and is communicated with the main flow channel inlet. The splitter plate 32 has six splitter channels 322, the outlet of each splitter channel 322 is set up in the lower end of splitter plate 32, the lower end of splitter plate 32 is equipped with a splitter channel bush 34 on the position of the outlet of each splitter channel 322 respectively, each splitter channel bush 34 communicates with corresponding splitter channel 322 respectively, the exit end (namely lower end) of each splitter channel bush 34 connects with sprue core 35 respectively. Six needle valves 333 are provided on the needle valve mounting frame 33, each needle valve 333 is provided in one-to-one correspondence with each subchannel bush 34, the upper end of each needle valve 333 is fixed to the needle valve mounting frame, and the lower end of each needle valve 333 is inserted into the corresponding sprue core 35. When the needle valve 333 moves downwards, the lower end of the needle valve 333 can block the outlet of the sprue core 35, so that the molten plastic in the mold cavity can obtain the pressure maintaining pressure; when the needle valve 333 moves upwards, the main runner liner 31, the splitter plate 32, the splitter runner liner 34, the sprue core 35 and the mold cavity are communicated in sequence, and the injection molding machine can be injected into the mold cavity through the needle valve type hot runner of the technical scheme; the mounting and connection of the main runner liner 31, manifold 32, runners, needle valve 333 and sprue core 35 is well known and need not be described in detail herein.
After the technical scheme of the embodiment is adopted, the servo motor 11 can drive the sliding frame to slide along the front-back direction, because the needle valve fixing frame 33 is connected on the guide pin 331 in the vertical direction in a sliding manner, the needle valve fixing frame 33 and the sliding frame 14 are connected with the inclined slide block 141 on the sliding frame 14 in a sliding manner through the inclined slide rail 332 on the needle valve fixing frame 33, and the inclined slide rail 332 inclines downwards from front to back, when the sliding frame 14 slides forwards, the needle valve fixing frame 33 can be driven to move downwards, so that the needle valve 333 on the needle valve fixing frame 33 can seal the sprue core 35, pressure maintaining pressure is formed in the forming mold, because the rotating speed and the rotating position of the servo motor 11 are easy to accurately control (the rotating speed and the rotating position of the servo motor can be controlled through an encoder, which is common knowledge), the sliding amount of the screw rod pushing mechanism is easy to accurately adjust, therefore, the sliding amount of the sliding frame 14 is easy to accurately control, the downward or upward movement amount of the needle valve 333 is also easy to accurately control, so that the pressure maintaining pressure is easy to adjust, and the larger pressure maintaining pressure can be obtained by increasing the downward movement amount of the needle valve 333, thereby avoiding insufficient pressure maintaining pressure caused by mold loss after the mold is used for a long time.
Preferably, the needle valve type hot runner of the technical scheme includes that the upper die base plate 4 is arranged at the bottom of the installation base plate 2, the shunt bushings 34 are embedded in the upper die base plate 4, the shunt plate 32 is arranged on the upper end face of the shunt bushings 34, a gap is formed between the shunt plate 32 and the upper die base plate 4, the shunt plate 32 and the shunt bushings 34 are convenient to assemble and repair due to the arrangement of the gap, and the split plate 32 and the shunt bushings 34 are convenient to clean when molten plastic leakage occurs between the shunt plate 32 and the shunt bushings 34. The injection mold comprises an upper cavity and a lower cavity, each sprue core 35 is embedded in the upper cavity, and the lower end of each runner bush 34 is embedded in the corresponding sprue core 35. By adopting the arrangement mode, the needle valve type hot runner is convenient to assemble.
Preferably, the upper cover of the installation seat plate 2 is provided with an upper seat plate 5, the bottom of the upper seat plate 5 is provided with an avoidance slotted hole 52 corresponding to the slide rail 21, the bottom of the upper seat plate 5 is provided with a square groove 51 corresponding to the sliding frame 14, and the sliding frame 14 can slide back and forth in the square groove 51 without affecting the operation of the needle valve 333; the upper ends of the guide pins 331 are inserted into the upper seat plate 5, the top of the flow distribution plate 32 is provided with a plurality of abutting pins 321, and the upper ends of the abutting pins 321 abut against the upper seat plate 5. By adopting the arrangement mode, the installation of the splitter plate 32 and the splitter channel bush 34 is firmer; after the upper end and the lower end of the guide pin 331 are fixed, the guide pin 331 is more stably installed, and the needle valve fixing frame 33 is more stable, so that the needle valve 333 is more stable; and the arrangement of the upper seat plate 5 also facilitates the cleaning of the flow distribution plate 32, the sliding frame 14, the needle valve fixing frame 33 and the like.
The embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications thereof by one of ordinary skill in the art should be considered as not departing from the scope of the present invention.
Claims (4)
1. The utility model provides an injection mold's needle valve formula hot runner which characterized in that: the screw rod pushing mechanism comprises a servo motor, a screw rod in transmission connection with the servo motor and a sliding nut seat arranged on the screw rod, and the screw rod and the servo motor are arranged at the front end of the mounting seat plate; the upper end surface of the installation seat plate is connected with a sliding frame in a sliding mode along the front-back direction, the front end of the sliding frame is connected with a sliding nut seat, a needle valve fixing frame is connected in the sliding frame in a sliding mode, the sliding track of the needle valve fixing frame relative to the sliding frame is inclined from front to back, a guide pin arranged vertically penetrates through the needle valve fixing frame, and the lower end of the guide pin is inserted into the installation seat plate;
a splitter plate is also embedded in the mounting seat plate, a main runner bushing and a plurality of splitter channel bushings are mounted on the splitter plate, and the outlet end of each splitter channel bushing is connected with a sprue nozzle core;
and a plurality of needle valves are arranged on the needle valve mounting frame, and each needle valve is in one-to-one correspondence with each sub-runner bushing.
2. The needle valve type hot runner of an injection mold according to claim 1, wherein: all install the oblique slide rail that sets up along the slant on the lateral wall of the both sides of needle valve mount, correspond on the inside wall of sliding frame respectively the oblique slide rail is provided with an oblique slider respectively, each slider sliding connection to one side is in corresponding on the oblique slide rail.
3. The needle valve type hot runner of an injection mold according to claim 1, wherein: the device comprises an upper die seat plate arranged at the bottom of an installation seat plate, wherein each shunt passage bushing is embedded in the upper die seat plate, the shunt plate is arranged on the upper end surface of each shunt passage bushing, and a gap is formed between the shunt plate and the upper die seat plate; and each sprue nozzle core is arranged outside the lower end of the corresponding runner bushing.
4. The needle valve type hot runner of an injection mold according to claim 1, wherein: a slide rail is convexly arranged on the installation seat plate along the front-back direction, the sliding frame is connected to the slide rail in a sliding manner, an upper seat plate is arranged on the installation seat plate in a covering manner, an avoiding groove hole is formed in the bottom of the upper seat plate corresponding to the slide rail, and a square groove for the sliding frame to slide back and forth is formed in the bottom of the upper seat plate; the upper ends of the guide pins are inserted into the upper seat plate, a plurality of abutting pins are arranged at the top of the flow distribution plate, and the upper ends of the abutting pins abut against the upper seat plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121406098.2U CN216127660U (en) | 2021-06-23 | 2021-06-23 | Needle valve type hot runner of injection mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121406098.2U CN216127660U (en) | 2021-06-23 | 2021-06-23 | Needle valve type hot runner of injection mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216127660U true CN216127660U (en) | 2022-03-25 |
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ID=80766796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121406098.2U Active CN216127660U (en) | 2021-06-23 | 2021-06-23 | Needle valve type hot runner of injection mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216127660U (en) |
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2021
- 2021-06-23 CN CN202121406098.2U patent/CN216127660U/en active Active
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