Hot nozzle structure of inclined plastic feeding needle valve
By using a single-sided injection design and insert fixing of the oblique injection needle valve hot nozzle structure, the problems of valve needle misalignment and jamming are solved, achieving high concentricity and continuous injection molding process.
Patent Information
- Application Number
- CN202422809844.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-18
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-11-18
AI Technical Summary
In existing injection molding hot runner needle valve structures, the valve needle is prone to deflection, resulting in poor concentricity, and the valve needle and valve sleeve are prone to jamming, affecting injection molding quality and production continuity.
The design incorporates a slanted glue needle valve hot nozzle structure with a single-sided glue inlet. The valve needle is fixed by inserts and a valve sleeve. The difference in the thermal expansion coefficients of the inserts prevents the valve needle from wobbling, and the use of materials with high thermal conductivity ensures temperature uniformity and prevents localized overheating.
It effectively prevents valve needle deflection, improves concentricity, avoids valve needle and valve sleeve jamming, and ensures the continuity and quality of the injection molding process.
Smart Images
Figure CN223520104U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to injection molding field especially relates to a slanting glue needle valve hot nozzle structure. BACKGROUND
[0002] The injection molding hot runner needle valve structure on the market at present all adopt that glue material flows into the hot nozzle through the flow distribution plate, then the valve needle carries out the telescopic activity, opens or closes the gate, and the injection molding channel leads to the injection molding cavity from the both sides of the valve needle, and when the material flows through the injection molding channel, the valve needle will be impacted, and the valve needle will produce the yaw, and the traditional injection molding hot runner needle valve structure only adopts the valve sleeve fixed mode, the valve sleeve is far away from the gate, the fixed effect is not good, and the valve sleeve and the valve needle gate concentricity are poor, the injection molding deviation increases, and in actual use, the valve needle and the valve sleeve will be stuck, inaction and other phenomena, causing the problems such as shutdown.
[0003] Therefore, how to design a slanting glue needle valve hot nozzle structure with the valve needle not easy to yaw becomes a problem that the technical personnel in the field urgently need to solve. CONTENT OF THE UTILITY MODEL
[0004] The utility model discloses a kind of slanting glue needle valve hot nozzle structure, to solve the problem raised in above background technology.
[0005] To achieve the above object, the utility model provides the following technical scheme:
[0006] Provide a kind of slanting glue needle valve hot nozzle structure, including body, heater and valve needle, the heater is wrapped body, the body is equipped with gate, slanting glue needle valve hot nozzle structure is equipped with injection molding channel and valve needle channel, the injection molding channel is sequentially equipped with input section, corner section and output section from top to bottom, the valve needle channel is communicated with corner section, the valve needle channel, output section and gate are sequentially opposite from top to bottom, the valve needle is movably arranged in valve needle channel, corner section, output section and gate to open or close gate, the slanting glue needle valve hot nozzle structure further includes first insert piece, the first insert piece is fixedly connected with the body, the upper part of the valve needle channel and input section are all equipped in first insert piece, the first insert piece thermal expansion coefficient is greater than the thermal expansion coefficient of body.
[0007] Further, the slanting glue needle valve hot nozzle structure further includes valve sleeve, the first insert piece is fixedly connected in the body, the valve sleeve is located in the body and is located at the lower end of the first insert piece, the lower part of the valve needle channel, corner section and output section are all equipped in the valve sleeve.
[0008] Further, the first insert piece is fixedly connected on the upper end of the body, the lower part of the valve needle channel, corner section and output section are all equipped in the body.
[0009] Further, the corner section comprises a vertical channel and a horizontal channel, and the body is further provided with a third insert for guiding the movement of the valve needle, and the third insert is arranged in the horizontal channel and away from the end of the vertical channel.
[0010] Further, the third insert has a thermal expansion coefficient greater than that of the body.
[0011] Further, the inclined glue needle valve hot nozzle structure further comprises a fourth insert wrapped at the connection between the first insert and the body.
[0012] Further, the inclined glue needle valve hot nozzle structure further comprises a heat insulation cap wrapped around the peripheral side of the gate.
[0013] Further, the inclined glue needle valve hot nozzle structure further comprises a second insert wrapped around the outer wall of the body and located at a height corresponding to the output section.
[0014] Further, the second insert has a thermal expansion coefficient smaller than that of the body.
[0015] Further, the inclined glue needle valve hot nozzle structure further comprises a flange and a shell, and a part of the body is located in the shell, and the flange is sleeved on the upper end of the shell.
[0016] Compared with the prior art, the inclined glue needle valve hot nozzle structure has the following beneficial effects:
[0017] The inclined glue needle valve hot nozzle structure is provided, through the structure design of single-side glue feeding, and the valve needle is fixed in a valve sleeve or an insert, the positioning position of the valve needle is close to the gate, the positioning position of the valve needle and the body has high perpendicularity with the gate, the positioning position of the valve needle and the body is close to the gate, the valve needle is not prone to deflection during the working process, the first insert is made of a material with high thermal conductivity, the temperature inside the body is uniform, local overheating of the body is prevented, material decomposition is prevented, the thermal expansion amount of the first insert is greater than that of the body, the thermal expansion amount of the second insert is smaller than that of the body, the valve needle is prevented from shaking during the working process, and the problems of stoppage caused by the phenomenon that the valve needle and the valve sleeve are stuck and do not move during plastic molding are solved. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is a whole structure diagram of the embodiment 1 of the utility model;
[0019] Figure 2 It is a structure exploded view of the embodiment 1 of the utility model;
[0020] Figure 3 It is a sectional view of the embodiment 1 of the utility model;
[0021] Figure 4The injection channel schematic view of the embodiment 1 of the utility model is shown in the figure.
[0022] Figure 5 The overall structure diagram of the embodiment 2 of the utility model is shown in the figure.
[0023] Figure 6 The structure exploded view of the embodiment 2 of the utility model is shown in the figure.
[0024] Figure 7 The sectional view of the embodiment 2 of the utility model is shown in the figure.
[0025] Figure 8 The injection channel schematic view of the embodiment 2 of the utility model is shown in the figure.
[0026] The marks of the components in the figure are as follows: 11, valve needle; 12, flow distribution plate; 13, body; 14, flange; 15, heater; 16, injection channel; 161, input section; 162, corner section; 1621, vertical channel; 1622, horizontal channel; 163, output section; 17, valve sleeve; 18, heat insulation cap; 19, first insert; 110, second insert; 111, gate; 112, shell; 113, valve needle channel; 21, third insert; 22, fourth insert. DETAILED DESCRIPTION
[0027] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model.
[0028] Please refer to Figures 1 to 8 , provide a kind of oblique into glue needle valve hot nozzle structure, provide two specific embodiments below:
[0029] First embodiment: please refer to Figures 1 to 4, including the body 13, the heater 15 and the valve needle 11, the heater 15 wraps the body 13, the body 13 is provided with a gate 111, the inclined glue needle valve hot nozzle structure is provided with an injection channel 16 and a valve needle channel 113, the injection channel 16 is sequentially provided with an input section 161, a corner section 162 and an output section 163 from top to bottom, the valve needle channel 113 communicates with the corner section 162, the valve needle channel 113, the output section 163 and the gate 111 are sequentially opposite from top to bottom, the valve needle 11 is movably arranged in the valve needle channel 113, the corner section 162, the output section 163 and the gate 111 to open or close the gate 111, the inclined glue needle valve hot nozzle structure further comprises a first insert 19, the first insert 19 is fixedly connected with the body 13, the upper part of the valve needle channel 113 and the input section 161 are arranged in the first insert 19, the first insert 19 has a larger thermal expansion coefficient than the body 13, the first insert 19 cooperates with the fixed valve needle 11, so that the valve needle 11 is not easy to be deflected, the inclined glue needle valve hot nozzle structure further comprises an outer shell 112, the outer shell 112 wraps the outermost side to provide protection for the internal structure.
[0030] Further, the inclined glue needle valve hot nozzle structure further comprises a heat insulation cap 18, the heat insulation cap 18 wraps the circumferential side of the gate 111, since the gate 111 communicates with the outside air, the heat insulation cap 18 can reduce the heat loss at the gate 111, and avoid that the material in the injection channel 16 cannot flow due to cooling.
[0031] Further, the inclined glue needle valve hot nozzle structure further comprises a second insert 110, the second insert 110 wraps the outer wall of the body 13 and is located at a height corresponding to the output section 163. The second insert 110 is tightly fitted with the body 13, the second insert 110 is formed of a material with a small thermal expansion coefficient and a small thermal conductivity coefficient, for example, a titanium alloy material, which will not deform during work, after the second insert 110 is tightly fitted with the body 13, the positioning and size are adjusted by reprocessing, the concentricity is higher than that of the traditional valve sleeve 17, and after the second insert 110 is tightly fitted with the body 13, it is not disassembled in the later stage, there is no installation error in the later stage, so that the second insert 110 and the body 13 maintain a high concentricity.
[0032] Further, the inclined glue needle valve hot nozzle structure further comprises a flange 14, the flange 14 is sleeved on the upper end of the outer shell 112. The flange 14 can firmly fix the mold on the injection molding machine, ensuring that there is no looseness or displacement during the injection molding process.
[0033] The inclined needle valve hot nozzle structure further comprises a valve sleeve 17, the first insert 19 is fixedly connected in the body 13, the valve sleeve 17 is located in the body 13 and at the lower end of the first insert 19, and the lower part, corner section 162 and output section 163 of the valve needle channel 113 are all arranged in the valve sleeve 17. The valve sleeve 17 is positioned on the body 13 and near the second insert 110, which can better ensure that the valve sleeve 17 has a relatively high concentricity with the valve needle 11 and the gate 111. Since the valve sleeve 17 is relatively close to the gate 111, the perforation of the valve sleeve 17 has a relatively high perpendicularity with the gate 111, and the distance between the valve sleeve 17 and the gate 111 is shorter than that in the conventional structure, so the length of the deflection of the end of the valve needle 11 is shorter, and the valve needle 11 is less likely to deflect during the working process.
[0034] The first insert 19 is made of a material with a large thermal conductivity coefficient and a large thermal expansion coefficient, such as beryllium copper. The large thermal conductivity coefficient can ensure that the temperature inside the body 13 is uniform, preventing local overheating of the body 13 from causing material decomposition. The large thermal expansion coefficient can ensure that the thermal expansion amount of the first insert 19 is greater than that of the body 13 during the working process, preventing the gap between the first insert 19 and the body 13 from being filled with glue. Since this position is a dead angle position, the glue stays for a long time, which can cause decomposition. Therefore, the thermal expansion amount of the first insert 19 is greater than that of the body 13, which can fill the gap during the working process of the first insert 19, preventing glue from seeping in. Moreover, the thermal expansion amount of the first insert 19 is greater than that of the body 13, which can block the valve sleeve 17 during the working process, preventing the valve sleeve 17 from shaking and increasing the friction between the valve needle 11 and the valve sleeve 17.
[0035] During the working process, the material flows into the injection channel 16 from the flow distribution plate 12, and flows in the injection channel 16 under the heating action of the heater 15. The first insert 19 also expands under the action of the heater 15, the gap between the first insert 19 and the body 13 is filled by the first insert 19, and the first insert 19 pushes against the lower valve sleeve 17, preventing the valve sleeve 17 from shaking, controlling the upward movement of the valve needle 11, opening the gate 111, starting the injection, and moving the valve needle 11 downward after the injection is completed, closing the gate 111 and completing the injection. In this embodiment, the valve sleeve 17 is installed on the body 13, and the valve sleeve 17 is located close to the gate 111, which can better prevent the valve needle 11 from deflecting. Moreover, the first insert 19 fills the gap between the body 13 by using the thermal expansion effect during the working process, preventing the material from seeping in.
[0036] Second embodiment: please refer to Figures 5 to 8Compared with the first embodiment, the valve sleeve 17 is cancelled in the embodiment, and the first insert 19 is fixedly connected to the upper end of the body 13, and the lower part, the corner section 162 and the output section 163 of the valve needle channel 113 are arranged in the body 13. The corner section 162 comprises a vertical channel 1621 and a horizontal channel 1622, and the body 13 is further provided with a third insert 21 arranged in the horizontal channel 1622 and away from the end of the vertical channel 1621. The hot nozzle structure of the inclined glue needle valve further comprises a fourth insert 22 wrapped around the periphery of the connection between the first insert 19 and the body 13, and the first insert 19, the third insert 21 and the fourth insert 22 all have a larger thermal expansion coefficient than the body 13.
[0037] During operation, the control valve needle 11 moves upward, the gate 111 is opened, the injection molding is started, the material flows into the injection molding channel 16 from the distribution plate 12, and the material flows in the injection molding channel 16 under the heating action of the heater 15. The first insert 19, the third insert 21 and the fourth insert 22 all expand under the action of the heater 15, the gap between the first insert 19 and the body 13 is filled by the first insert 19 and the fourth insert 22, which prevents the decomposition of the glue due to long residence time, and the third insert 21 fills the gap at the side to prevent the material from seeping in. After the injection molding is completed, the valve needle 11 moves downward, the gate 111 is closed, and the injection molding is completed. The traditional valve sleeve structure has low concentricity, which may cause the phenomenon of jamming due to the deviation of the plate, and the material seeps into the gap of the traditional valve sleeve during the injection molding process, which causes jamming. The traditional valve sleeve structure is cancelled in the embodiment, the concentricity problem is solved by the first insert 19 and the third insert 21, and the third insert 21 and the fourth insert 22 can well fill the connection gap everywhere during the injection molding heating process, which avoids the phenomenon of jamming during the injection molding.
[0038] The above only describes the preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any skilled person in the art can make equivalent replacements or changes to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.
Claims
1. A bevel needle valve hot nozzle structure, comprising a body (13), a heater (15) and a valve needle (11), the heater (15) wrapping the body (13), the body (13) being provided with a gate (111), the bevel needle valve hot nozzle structure being provided with an injection channel (16) and a valve needle channel (113), the injection channel (16) being sequentially provided with an input section (161), a corner section (162) and an output section (163) from top to bottom, the valve needle channel (113) being communicated with the corner section (162), the valve needle channel (113), the output section (163) and the gate (111) being sequentially and vertically opposite from top to bottom, the valve needle (11) being movably arranged in the valve needle channel (113), the corner section (162), the output section (163) and the gate (111) to open or close the gate (111), characterized in that: The oblique-injection glue needle valve hot nozzle structure further comprises a first insert (19) fixedly connected with the body (13), and the upper part and the input section (161) of the valve needle channel (113) are arranged in the first insert (19), and the first insert (19) has a larger thermal expansion coefficient than the body (13).
2. A bevelled pin valve hot tip structure according to claim 1, wherein: The oblique-injection glue needle valve hot nozzle structure further comprises a valve sleeve (17), the first insert (19) is fixedly connected in the body (13), the valve sleeve (17) is located in the body (13) and at the lower end of the first insert (19), and the lower part, the corner section (162) and the output section (163) of the valve needle channel (113) are arranged in the valve sleeve (17).
3. A bevelled pin valve hot tip structure according to claim 1, wherein: The first insert (19) is fixedly connected at the upper end of the body (13), and the lower part, the corner section (162) and the output section (163) of the valve needle channel (113) are arranged in the body (13).
4. A bevelled pin valve hot tip structure according to claim 3, wherein: The corner section (162) comprises a vertical channel (1621) and a horizontal channel (1622), the body (13) further comprises a third insert (21) for guiding the movement of the valve needle (11), and the third insert (21) is arranged in the horizontal channel (1622) and away from the end of the vertical channel (1621).
5. A bevelled pin valve hot tip structure according to claim 4, wherein: The third insert (21) has a larger thermal expansion coefficient than the body (13).
6. A bevelled pin valve hot tip structure according to claim 3, wherein: The oblique-injection glue needle valve hot nozzle structure further comprises a fourth insert (22), and the fourth insert (22) is wrapped around the connection between the first insert (19) and the body (13).
7. A bevelled pin valve hot tip structure according to claim 1, wherein: The oblique-injection glue needle valve hot nozzle structure further comprises a heat insulation cap (18), and the heat insulation cap (18) is wrapped around the circumferential side of the gate (111).
8. The bevelled pin valve hot tip structure of claim 1, wherein: The oblique-injection glue needle valve hot nozzle structure further comprises a second insert (110), the second insert (110) is wrapped around the outer wall of the body (13) and located at a height corresponding to the output section (163).
9. A bevelled pin valve hot tip structure according to claim 8, wherein: The second insert (110) has a smaller thermal expansion coefficient than the body (13).
10. The bevelled pin valve hot tip structure of claim 1, wherein: The oblique-injection glue needle valve hot nozzle structure further comprises a flange (14) and an outer shell (112), a part of the body is located in the outer shell (112), and the flange (14) is arranged at the upper end of the outer shell (112).