Needle valve automatic glue overflowing system
By designing the needle valve automatic spilling system with the overflow hole position and overflow runner on the needle valve sleeve, the mold spilling problem is solved, disassembly and maintenance is achieved, production efficiency and product quality are improved, and costs are reduced.
Patent Information
- Application Number
- CN202421982018.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-15
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-08-15
AI Technical Summary
In the prior art, the mold is prone to leakage problems during use, especially the leakage of the needle valve sleeve, which causes the mold to be frequently disassembled and cleaned, affecting production efficiency and product quality, and increasing maintenance costs.
An automatic needle valve overflow system is designed. By opening an overflow hole position and an overflow flow channel on the needle valve sleeve, the aperture of the overflow hole position is larger than the aperture of the needle valve sleeve. When the pressure of the molten material is too large, the molten material flows out of the overflow flow channel through the overflow hole position and is discharged out of the diverter plate to avoid overflow.
It effectively avoids mold glue spills, saves production time and maintenance costs, improves product quality, extends mold service life, and reduces production costs.
Smart Images
Figure CN223290197U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mold equipment, in particular to an automatic glue overflow system for a needle valve. Background Art
[0002] Glue overflow from the manifold is a common problem, primarily occurring in hot runner systems within plastic injection molds. Glue overflow occurs when plastic melt unexpectedly escapes from the mold. Troubleshooting this issue typically involves disassembling the mold to inspect and clean the manifold, ensuring it is properly aligned with the hot runner nozzle to avoid gaps.
[0003] However, in actual use, no matter how well the installation dimensions are in place, due to the good fluidity of some materials or materials that require higher pressure, such as pp-pet-pe---PPSGF-PEEK-PA66GF, glue overflows from the needle valve sleeve, and the valve needle cylinder cannot return to its original position. As a result, after a period of use, the mold must be disassembled to remove the glue overflow. The need to repeatedly disassemble the mold leads to slower product production time. If the glue overflow in the mold is not cleaned, the quality of the prepared product will be defective. Moreover, multiple mold disassembly leads to further increase in mold assembly errors, which incurs time costs for mold cleaning and maintenance. At the same time, some glue overflows that are difficult to clean also damage the mold itself, causing the mold to be scrapped and further increasing costs.
[0004] The market usually installs an alarm device on the mold, that is, when glue overflow occurs, the equipment stops running immediately. Although it can prevent the glue overflow from continuing to expand, the mold still needs to be disassembled and cleaned, which is extremely inconvenient.
[0005] Therefore, improvements need to be made to this. Utility Model Content
[0006] The technical problem solved by the present invention is to provide a needle valve automatic glue overflow system to solve the problems raised in the above background technology in view of the defects existing in the above prior art.
[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: a needle valve automatic glue overflow system, comprising: a mold diverter plate, wherein the mold diverter plate is provided with a hot runner for diverting the molten material; the bottom of the mold diverter plate is provided with a discharge hole for the molten material to flow out, and the discharge hole is communicated with the hot runner; the top of the mold diverter plate is provided with a main nozzle for the molten material to enter, and the mold diverter plate is provided with more than one needle valve sleeve, at least a part of the needle valve sleeve is placed in the hot runner, and the needle valve sleeve has There is a hole position communicating with the hot runner and the discharge hole, and the needle valve sleeve is used to cooperate with an external valve needle to open or close the molten material to flow out through the discharge hole; wherein, the needle valve sleeve is provided with an overflow hole position at the position of the hot runner, the aperture of the overflow hole position is larger than the aperture of the needle valve sleeve, an overflow channel is arranged inside the mold diverter plate and drains to the outside, and the overflow channel is communicated with the overflow hole position; when the pressure of the molten material in the hot runner is relatively large, the molten material in the hot runner is discharged through the overflow channel to release the pressure.
[0008] Furthermore, the diameter of the overflow hole is 1 mm to 8 mm larger than the diameter of the needle valve sleeve.
[0009] Furthermore, the distance between the bottom edge of the overflow hole and the bottom edge of the needle valve sleeve is 5 mm to 8 mm.
[0010] Furthermore, the horizontal plane of the overflow channel is higher than the horizontal plane of the hot runner.
[0011] Furthermore, the overflow channels are arranged in series or in parallel.
[0012] Furthermore, it includes a heating device, which is arranged on the side of the mold diverter plate and connected to the overflow channel, and is used to heat the molten material in the overflow channel.
[0013] Furthermore, the needle valve sleeve is detachably connected to the mold diverter plate, and the lower end surface of the needle valve sleeve is in contact with the mold diverter plate.
[0014] Furthermore, the mold manifold includes heating tubes laid on the upper and lower end surfaces of the mold manifold, and the heating tubes are used to heat the molten material in the hot runner.
[0015] Compared with the prior art, the beneficial effects of the present invention are:
[0016] 1. By opening an overflow hole on the needle valve sleeve and cooperating with the overflow channel of the manifold, when the pressure of the molten material in the hot runner is high, the molten material can flow out from the overflow hole of the needle valve sleeve and be discharged out of the manifold through the overflow channel, thereby effectively avoiding the glue overflow problem of the manifold. During use, there is no need to disassemble and clean the mold, which can save production time; there is no need to disassemble and maintain the mold, which correspondingly saves maintenance costs and achieves maintenance-free; solves the glue overflow problem of the mold, eliminates product quality defects, and improves product production quality; greatly reduces production costs and extends the service life of the mold.
[0017] 2. Add a heating device. The heating device is used to heat the molten material outside the manifold to avoid blockage of the molten material discharged from the manifold, which will cause the manifold to overflow again. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a partial structural diagram of the automatic glue overflow system for mold applications.
[0019] Figure 2 It is a structural diagram of the present utility model.
[0020] Figure 3 It is a schematic diagram of the top structure of the utility model.
[0021] Figure 4 yes Figure 3 AA cross-section structure diagram.
[0022] Figure 5 yes Figure 4 Schematic diagram of the enlarged structure.
[0023] Figure 6 It is a side structural schematic diagram of the utility model.
[0024] Figure 7 yes Figure 6 Schematic diagram of the BB cross-section structure.
[0025] Figure 8 It is a front view structural schematic diagram of the utility model.
[0026] Figure 9 yes Figure 8 Schematic diagram of the CC cross-section structure.
[0027] Figure 10 This is a schematic diagram of a mold explosion using an automatic glue overflow system.
[0028] Figure 11 It is a structural diagram of the needle valve cylinder, valve needle, needle valve sleeve and hot nozzle.
[0029] Figure 12This is a schematic diagram of the application of the automatic overflow glue system.
[0030] Figure 13 yes Figure 12 AA cross-sectional diagram of .
[0031] Figure 14 yes Figure 13 A partial enlarged schematic diagram.
[0032] Figure numerals: 1. mold manifold; 2. hot runner; 3. discharge hole; 4. main nozzle; 5. needle valve sleeve; 6. overflow hole; 7. overflow channel; 8. heating device; 9. heating tube; 10. needle valve cylinder; 11. valve needle; 12. hot nozzle; 13. overflow position. DETAILED DESCRIPTION
[0033] The present invention will be further described in detail below with reference to the accompanying drawings.
[0034] The embodiments described with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application. In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present application, "several" or "multiple" means two or more, unless otherwise specifically defined. In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; or internal communication between two components. A person skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances. In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them. Furthermore, "above," "above," and "above" a first feature may include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher level than the second feature. "Below," "below," and "below" a first feature may include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a lower level than the second feature.
[0035] like Figure 1-9As shown, a needle valve automatic glue overflow system is provided, comprising: a mold diverter plate 1, wherein a hot runner 2 for diverting molten material is provided inside the mold diverter plate 1; a discharge hole 3 for molten material to flow out is provided at the bottom of the mold diverter plate 1, and the discharge hole 3 is communicated with the hot runner 2; a main nozzle 4 for molten material to enter is provided at the top of the mold diverter plate 1, and one or more needle valve sleeves 5 are provided on the mold diverter plate 1, and at least a part of the needle valve sleeve 5 is placed in the hot runner 2, and the needle valve sleeve 5 has a connection with the hot runner 2, ... The hole position communicated with the discharge hole 3, the needle valve sleeve 5 is used to cooperate with the external valve needle to open or close the molten material flowing out through the discharge hole 3; wherein, the needle valve sleeve 5 opens an overflow hole position 6 at the position of the hot runner 2, the aperture of the overflow hole position 6 is larger than the aperture of the needle valve sleeve 5, and an overflow channel 7 is arranged inside the mold diverter plate 1 and drains to the outside, and the overflow channel 7 is communicated with the overflow hole position 6; when the pressure of the molten material in the hot runner 2 is relatively large, the molten material in the hot runner 2 is discharged through the overflow channel 7 to release the pressure.
[0036] Provides a needle valve automatic glue overflow system, mainly used for molds, such as injection molding equipment, blow molding equipment, etc.
[0037] As described in the background art, the problem of glue overflow in the mold mainly occurs at the manifold position. It is mainly caused by the pressure problem generated by the flow of various materials and the fluidity problem of the material itself. Specifically, the molten material pressure in the manifold is too high or the fluidity is good, causing the molten material to overflow from the manifold; Figure 14 As shown, the overflow position 13 is mainly where the molten material overflows. Figure 12 and Figure 13 When the molten material overflows from the valve needle sleeve 5, the needle valve cylinder 10 cannot return to its position, resulting in product defects and the produced products cannot meet customer needs.
[0038] In this regard, a needle valve automatic glue overflow system is proposed, which adopts an automatic glue overflow method. When the pressure of the molten material in the hot runner 2 is too high, the glue overflow pressure is released to avoid glue overflow from the manifold.
[0039] In practice, the hot runner 2 is set inside the diverter plate 1 according to the needs of the product. There is no restriction on the shape of the hot runner 2, and it can be set accordingly according to the different products produced. A valve needle 11 and a needle valve cylinder 10 are installed above the diverter plate 1, and a hot nozzle 12 is installed below the diverter plate 1. The external valve needle 11 opens the hot nozzle 12 under the drive of the needle valve cylinder 10. During normal use, the main nozzle 4 on the diverter plate is used for the entry of molten material, so that the molten material enters the hot runner 2 for diversion, and is connected to the hot nozzle through the discharge hole 3 on the diverter plate for product molding. When the pressure of the molten material in the hot runner 2 is high or the fluidity of the molten material is good, it is easy for the molten material to overflow from the needle valve sleeve 5. For this purpose, an overflow hole 6 is designed on the needle valve sleeve 5. The overflow hole 6 is horizontally arranged on the needle valve sleeve 5, and the aperture of the needle valve sleeve 5 is used to place the valve needle 11. In the design, while satisfying the flow of the molten material, the aperture of the overflow hole 6 is designed to be larger than the aperture of the needle valve sleeve 5. Through this structural design, the molten material pressure in the diverter plate 1 is too high or the fluidity is good, causing the molten material in the hot runner 2 to flow toward the needle valve sleeve 5 position. Since the aperture of the overflow hole 6 is designed to be larger than the aperture of the needle valve sleeve 5, the valve needle 11 cannot block and close the overflow hole 6, and the molten material flows out of the overflow hole 6 to release the pressure, so that the molten material will not flow out from the upper part of the needle valve sleeve 5, causing the problem of glue overflow from the diverter plate 1.
[0040] Through this technical solution, by opening an overflow hole 6 on the needle valve sleeve 5 and cooperating with the overflow channel 7 of the diverter plate 1, when the pressure of the molten material in the hot runner 2 is relatively high, the molten material can flow out from the overflow hole 6 of the needle valve sleeve 5 and be discharged out of the diverter plate 1 through the overflow channel 7, thereby effectively avoiding the glue overflow problem of the diverter plate 1. During use, there is no need to disassemble and clean the mold, which can save production time; there is no need to disassemble and maintain the mold, which correspondingly saves maintenance costs and achieves maintenance-free; the glue overflow problem of the mold is solved, the product has no quality defects, and the product production quality is improved; the production cost is greatly reduced, and the service life of the mold is extended; and the glue overflow problem of materials with good fluidity, high-temperature materials or materials with high injection pressure is effectively solved.
[0041] Preferably, the diameter of the overflow hole is 1 mm to 8 mm larger than the diameter of the needle valve sleeve, so that the mold can be depressurized in time while meeting product production requirements to avoid glue overflow.
[0042] Furthermore, the distance between the bottom edge of the overflow hole and the bottom edge of the needle valve sleeve is 5mm to 8mm. This distance can ensure that when the molten material is under high pressure, the pressure can be released in time to avoid glue overflow from the needle valve. If the distance between the overflow hole and the bottom edge is set too large, the pressure cannot be released in time.
[0043] As a preferred technical solution, in order to facilitate the pressure relief of the over-pressured molten material, the overflow channel 7 is located at a level higher than the level of the hot runner 2. Furthermore, the molten material in the hot runner 2 is discharged outside the manifold through the overflow channel 7.
[0044] Specifically, the overflow channels 7 can be arranged in series or in parallel, which can be selected according to the specific implementation situation and is not limited to this. For example, an overflow channel can be independently set for each needle valve sleeve, or the overflow channels of multiple needle valve sleeves can be connected.
[0045] The utility model includes a heating device 8 , which is arranged on the side of the mold manifold 1 and connected to the overflow channel 7 . The heating device 8 is used to heat the molten material in the overflow channel 7 .
[0046] Since the molten material outside the diverter plate is prone to solidification and blockage in the absence of a heating device 8, the molten material cannot be discharged and the pressure is released. Therefore, a heating device 8 is added to the outside of the diverter plate. The heating device 8 can be a heating tube heated by a resistance wire or other methods to heat the molten material and maintain fluidity.
[0047] Specifically, the needle valve sleeve 5 is detachably connected to the mold diverter plate 1 , and the lower end surface of the needle valve sleeve 5 is in contact with the mold diverter plate 1 .
[0048] Specifically, the mold manifold 1 includes heating tubes 9 laid on the upper and lower end surfaces of the mold manifold 1 , and the heating tubes 9 are used to heat the molten material in the hot runner 2 .
[0049] The above does not limit the technical scope of the present invention. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.
Claims
1. The needle valve automatic glue overflow system is characterized by: include: A mold manifold plate, wherein a hot runner for diverting molten material is provided inside the mold manifold plate; a discharge hole for discharging molten material is provided at the bottom of the mold manifold plate, and the discharge hole is communicated with the hot runner; a main nozzle for entering molten material is provided at the top of the mold manifold plate, and one or more needle valve sleeves are provided on the mold manifold plate, at least a portion of the needle valve sleeve is placed in the hot runner, the needle valve sleeve has a hole position communicating with the hot runner and the discharge hole, and the needle valve sleeve is used to cooperate with an external valve needle to open or close the flow of molten material through the discharge hole; Among them, the needle valve sleeve opens an overflow hole at the hot runner position, the aperture of the overflow hole is larger than the aperture of the needle valve sleeve, the overflow channel is set inside the mold diverter plate and drains to the outside, and the overflow channel is connected to the overflow hole.
2. The needle valve automatic glue overflow system according to claim 1, characterized in that: The diameter of the overflow hole is 1 mm to 8 mm larger than the diameter of the needle valve sleeve.
3. The needle valve automatic glue overflow system according to claim 1, characterized in that: The distance between the lowermost edge of the overflow hole and the lowermost edge of the needle valve sleeve is 5 mm to 8 mm.
4. The needle valve automatic glue overflow system according to claim 1, characterized in that: The horizontal plane of the overflow channel is higher than the horizontal plane of the hot runner.
5. The needle valve automatic glue overflow system according to claim 1, characterized in that: The overflow channels are arranged in series or in parallel.
6. The needle valve automatic glue overflow system according to claim 1, characterized in that: It comprises a heating device, which is arranged on the side of the mold diverter plate and connected to the overflow channel. The heating device is used to heat the molten material in the overflow channel.
7. The needle valve automatic glue overflow system according to claim 1, characterized in that: The needle valve sleeve is detachably connected to the mold diverter plate, and the lower end surface of the needle valve sleeve is in contact with the mold diverter plate.
8. The needle valve automatic glue overflow system according to claim 1, characterized in that: The mold manifold includes heating tubes laid on the upper and lower end surfaces of the mold manifold, and the heating tubes are used to heat the molten material in the hot runner.