Injection molding nozzle for injection molding

Abstract

The utility model relates to the field of injection nozzles, and discloses an injection nozzle for injection molding, which comprises a nozzle body and a nozzle head, a sealing mechanism is arranged on the inner wall of the nozzle body, the edge of the lower end of the nozzle body is fixedly connected with the edge of the upper end of the nozzle head, and the sealing mechanism comprises a worm. A cavity is formed in the lower end of the inner wall of the nozzle body, a mounting block is fixedly connected to the lower portion of the inner wall of the cavity, a rotating groove is formed in the edge of the upper end of the mounting block, a threaded rod is in threaded connection with the middle of the mounting block, a plug is fixedly connected to the lower end of the threaded rod, and the outer wall of the threaded rod is sleeved with a worm wheel. Liquid enters through the feeding cylinder, the worm rotates to drive the worm gear and the threaded rod to move linearly, the chock plug is driven to move upwards to open the outlet, the flow speed of the liquid is controlled by adjusting the position of the chock plug, the heating wire keeps the temperature of the liquid constant, the liquid is prevented from being solidified to block the nozzle, and when not used, the chock plug descends to block the outlet, leakage is prevented, and flexible flow control is achieved.

Description

Technical Field

[0001] The utility model relates to the field of injection nozzles, in particular to an injection nozzle for injection molding. Background Art

[0002] Injection molding is a common plastic processing technology that forms the desired plastic product by injecting molten plastic material into a mold, which is then cooled and solidified inside the mold. The injection nozzle accurately and quickly injects the molten plastic into the mold cavity during the injection molding process. It can precisely control the flow of the molten plastic to ensure that the plastic evenly fills every corner of the mold.

[0003] However, traditional injection nozzles have poor thermal insulation performance, making it difficult to maintain a constant temperature of the liquid, and have poor sealing performance, which will cause liquid leakage when not in use. Most existing injection nozzles can only maintain one speed for processing and cannot meet the adjustment of the spraying speed.

[0004] Therefore, those skilled in the art provide an injection nozzle for injection molding to solve the problems raised in the above background technology. Utility Model Content

[0005] The purpose of the present utility model is to solve the shortcomings of the prior art and to propose an injection molding nozzle for injection molding. Liquid enters through a feed barrel, the worm rotates to drive the worm wheel, and the threaded rod moves linearly, driving the plug to move up to open the outlet. The liquid flow rate is controlled by adjusting the position of the plug, and the heating wire maintains a constant temperature of the liquid to prevent solidification and clogging of the nozzle. When not in use, the plug descends to block the outlet to prevent leakage, thereby realizing flexible flow control.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] An injection nozzle for injection molding, comprising a nozzle body and a nozzle head, wherein the inner wall of the nozzle body is provided with a sealing mechanism, the lower edge of the nozzle body is fixedly connected to the upper edge of the nozzle head, the sealing mechanism comprises a worm, the lower end of the inner wall of the nozzle body is provided with a cavity, the lower portion of the inner wall of the cavity is fixedly connected to a mounting block, the upper edge of the mounting block is provided with a rotation groove, the middle portion of the mounting block is threadedly connected to a threaded rod, the lower end of the threaded rod is fixedly connected to a plug, the outer wall of the threaded rod is sleeved with a worm gear, and both sides of the lower end of the worm gear are fixedly connected to rotating columns;

[0008] By the above technical scheme, the worm is rotated, the worm wheel is rotated, the threaded rod is moved linearly through the threaded connection, and the plug head is moved up and down, when not in use, the plug head is lowered by operating the worm, the outlet is blocked, liquid leakage is effectively prevented, and material waste is reduced, and when in use, the plug head is raised by rotating the worm, the outlet is opened, the position of the plug head is controlled, the speed of liquid flow is adjusted, and different use requirements are met.

[0009] Further, a feeding cylinder is arranged at the upper end of the nozzle body, and heating wires are arranged in the middle of the outer walls of the feeding cylinder;

[0010] Through the above technical scheme, the liquid flowing from the feeding cylinder can be maintained at a constant temperature by heating the heating wires, the liquid is prevented from solidifying due to temperature drop, the nozzle head is prevented from being blocked, and the downtime caused by nozzle blockage is reduced.

[0011] Further, a discharging cavity is arranged in the inner wall of the nozzle head;

[0012] Through the above technical scheme, the molten plastic can flow more smoothly, and the flow resistance is reduced.

[0013] Further, the two rotating columns rotate in the inner walls of the rotating grooves;

[0014] Through the above technical scheme, the frequency of maintenance and replacement of parts is reduced, thereby reducing the maintenance cost.

[0015] Further, the worm wheel is engaged with the worm;

[0016] Through the above technical scheme, the worm and worm wheel transmission has a self-locking feature, after stopping rotation, the worm wheel will not rotate in the opposite direction due to gravity or other external forces, and the safety of operation is improved.

[0017] Further, the worm wheel is threadedly connected with the threaded rod;

[0018] Through the above technical scheme, the rotational motion of the worm wheel is converted into the linear motion of the threaded rod through the threaded connection, the power can be effectively transmitted, and the energy loss is reduced.

[0019] Further, the worm penetrates the cavity and the nozzle body to the outside of the nozzle body on the other side;

[0020] Through the above technical scheme, the replacement and maintenance of the worm are more convenient, and the operator can directly contact the worm from the outside of the nozzle.

[0021] Further, the plug head is tightly attached to the lower end of the nozzle head;

[0022] Through the above technical scheme, good sealing performance is ensured, and molten plastic is prevented from leaking in a non-working state.

[0023] The utility model has the following beneficial effects:

[0024] 1. The utility model proposes an injection molding nozzle for injection molding. When the worm is rotated, the worm wheel rotates accordingly. Through the threaded connection, the threaded rod produces linear motion, which in turn drives the plug to move up and down. When not in use, the worm is operated to lower the plug to block the outlet, effectively preventing liquid leakage and reducing material waste. When in use, the plug is raised by rotating the worm to open the outlet. At the same time, the position of the plug is controlled to adjust the speed of liquid flow to meet different usage requirements. This design not only realizes the anti-leakage function, but also can flexibly control the flow rate of the liquid.

[0025] 2. The utility model proposes an injection nozzle for injection molding, which can maintain a constant temperature of the liquid flowing into the feed barrel by heating the heating wire, preventing the liquid from solidifying due to temperature drop, avoiding clogging of the nozzle head, reducing downtime caused by nozzle clogging, improving the operating efficiency and output of the production line, and ensuring the smooth progress of the entire injection molding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is an axonometric view of an injection nozzle for injection molding proposed in the utility model;

[0027] Figure 2 This is a front cross-sectional view of an injection nozzle for injection molding proposed by the utility model;

[0028] Figure 3 This is a structural diagram of an injection nozzle for injection molding proposed by the utility model;

[0029] Figure 4 This is a partial structural diagram of an injection nozzle for injection molding proposed by the utility model.

[0030] Legend:

[0031] 1. Sealing mechanism; 101. Worm; 102. Worm wheel; 103. Threaded rod; 104. Mounting block; 105. Rotating groove; 106. Rotating column; 107. Plug;

[0032] 2. Nozzle body; 3. Nozzle head; 4. Feed barrel; 5. Discharge cavity; 6. Cavity; 7. Heating wire. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the specific embodiments of the present invention to clearly and completely describe the technical solutions in the specific embodiments of the present invention. Obviously, the specific embodiments described are only part of the specific embodiments of the present invention, not all of the specific embodiments. Based on the specific embodiments of the present invention, all other specific embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] Reference Figure 1 、 Figure 2 and Figure 3 , a specific embodiment of the present invention provides: an injection nozzle for injection molding, comprising a nozzle body 2 and a nozzle head 3, a sealing mechanism 1 is provided on the inner wall of the nozzle body 2, the lower edge of the nozzle body 2 is fixedly connected to the upper edge of the nozzle head 3, the sealing mechanism 1 comprises a worm 101, a cavity 6 is provided at the lower end of the inner wall of the nozzle body 2, a mounting block 104 is fixedly connected to the lower part of the inner wall of the cavity 6, a rotating groove 105 is provided at the upper edge of the mounting block 104, a threaded rod 103 is threadedly connected to the middle part of the mounting block 104, a plug 107 is fixedly connected to the lower end of the threaded rod 103, a worm gear 102 is sleeved on the outer wall of the threaded rod 103, and rotating columns 106 are fixedly connected to both sides of the lower end of the worm gear 102;

[0035] By rotating the worm 101, the worm wheel 102 rotates accordingly, and through the threaded connection, the threaded rod 103 produces linear motion, which in turn drives the plug 107 to move up and down. When not in use, the worm 101 is operated to lower the plug 107 to block the outlet, effectively preventing liquid leakage and reducing material waste. When in use, the worm 101 is rotated to raise the plug 107 to open the outlet, and the position of the plug 107 is controlled at the same time to adjust the speed of liquid flow to meet different usage requirements.

[0036] Reference Figure 3 and Figure 4A feed barrel 4 is provided at the upper end of the nozzle body 2, and a heating wire 7 is sleeved in the middle of the outer wall on both sides of the feed barrel 4. By heating the heating wire 7, the liquid flowing in from the feed barrel 4 can be kept at a constant temperature to prevent the liquid from solidifying due to temperature drop, avoid clogging the nozzle head 3, and reduce the downtime caused by nozzle clogging. A discharge cavity 5 is provided on the inner wall of the nozzle head 3, which helps the molten plastic to flow more smoothly and reduces the flow resistance. The two rotating columns 106 rotate on the inner wall of the rotating groove 105, reducing the frequency of maintenance and replacement of parts, thereby reducing maintenance costs. The worm gear 102 is engaged with the worm 101, and the worm 101 and worm gear 102 transmission have self-locking Characteristics: After stopping rotation, the worm gear 102 will not rotate in the opposite direction due to gravity or other external forces, which improves the safety of operation. The worm gear 102 is threadedly connected to the threaded rod 103, and the rotational motion of the worm gear 102 is converted into the linear motion of the threaded rod 103 through the threaded connection, which can effectively transmit power and reduce energy loss. The other side of the worm 101 passes through the cavity 6 and the nozzle body 2 to the outside of the nozzle body 2, making the replacement and maintenance of the worm 101 easier. The operator can directly contact the worm 101 from the outside of the nozzle, and the plug 107 fits tightly with the lower end of the nozzle head 3 to ensure good sealing performance and prevent the molten plastic from leaking when not in operation.

[0037] Working principle: let the liquid enter through the feed barrel 4, rotate the worm 101, and the worm wheel 102 rotates accordingly. Through the threaded connection, the threaded rod 103 produces linear motion, which in turn drives the plug 107 to move up and down, so that the plug 107 rises and opens the outlet. At the same time, the position of the plug 107 is controlled to adjust the flow rate of the liquid. The heating wire 7 is heated to maintain a constant temperature of the liquid flowing into the feed barrel 4, preventing the liquid from solidifying due to temperature drop, avoiding clogging of the nozzle head 3, and reducing the downtime caused by nozzle clogging. When not in use, operate the worm 101 to lower the plug 107 and block the outlet, effectively preventing liquid leakage, realizing the anti-leakage function, and being able to flexibly control the flow of the liquid.

[0038] Finally, it should be noted that the above is only a preferred specific implementation method of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned specific implementation methods, those skilled in the art can still modify the technical solutions described in the aforementioned specific implementation methods or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An injection molding nozzle, comprising a nozzle body (2) and a nozzle head (3), characterized in that: The inner wall of the nozzle body (2) is provided with a sealing mechanism (1), and the lower end edge of the nozzle body (2) is fixedly connected to the upper end edge of the nozzle head (3); The sealing mechanism (1) comprises a worm (101), a cavity (6) is provided at the lower end of the inner wall of the nozzle body (2), a mounting block (104) is fixedly connected to the lower portion of the inner wall of the cavity (6), a rotation groove (105) is provided at the upper edge of the mounting block (104), a threaded rod (103) is threadedly connected to the middle portion of the mounting block (104), a plug (107) is fixedly connected to the lower end of the threaded rod (103), a worm wheel (102) is sleeved on the outer wall of the threaded rod (103), and rotating columns (106) are fixedly connected to both sides of the lower end of the worm wheel (102).

2. The injection molding nozzle according to claim 1, characterized in that: A feed barrel (4) is provided at the upper end of the nozzle body (2), and a heating wire (7) is sleeved on the middle portion of the outer walls on both sides of the feed barrel (4).

3. The injection molding nozzle according to claim 1, characterized in that: The inner wall of the nozzle head (3) is provided with a discharge cavity (5).

4. The injection molding nozzle according to claim 1, wherein: The two rotating columns (106) both rotate on the inner wall of the rotating groove (105).

5. The injection molding nozzle according to claim 1, characterized in that: The worm wheel (102) is meshed with the worm (101).

6. The injection molding nozzle according to claim 1, characterized in that: The worm wheel (102) is threadedly connected to the threaded rod (103).

7. The injection molding nozzle according to claim 1, characterized in that: The other side of the worm (101) passes through the cavity (6) and the nozzle body (2) to the outside of the nozzle body (2).

8. The injection molding nozzle according to claim 1, characterized in that: The plug head (107) is tightly fitted to the lower end of the nozzle head (3).

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