Injection mold with a nozzle structure that is easy to replace

Abstract

This utility model relates to the field of injection molding technology, specifically disclosing an injection mold that facilitates nozzle structure replacement, including: a hot run nozzle and an upper mold; it also includes: a connecting plate, with a snap-fit ​​component fixedly connected to the top of the connecting plate, a push rod provided on one side of the snap-fit ​​component, and a locking component sleeved on the surface of the push rod. This utility model, through the snap-fit ​​component and the locking component, eliminates the need to disassemble multiple fasteners one by one when replacing the nozzle. Simply push the push rod to drive the prism panel away from the notch of the locking component, and the axial locking is released under the elastic force of the fixed spring. Simultaneously, the compressed spring pushes the moving component to reset, causing the contact component to separate from the nozzle, releasing the lateral clamping. The entire process requires no complex tools, and the operation steps are simplified, effectively solving the problems of narrow operating space and cumbersome steps in traditional structures. It significantly shortens the time for a single nozzle replacement, especially in multi-variety, small-batch production scenarios, significantly reducing the production preparation cycle.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, specifically to an injection mold with a convenient nozzle structure replacement. Background Technology

[0002] In the field of injection molding, hot runner nozzles are core functional components of the mold system, directly responsible for the precise delivery of molten plastic to the mold cavity. Their performance and condition play a decisive role in the quality of molded parts (such as dimensional accuracy, surface finish, and weld line control). However, during long-term use, hot runner nozzles are prone to aging, clogging, or damage due to factors such as melt erosion, high-temperature oxidation, and mechanical wear, requiring regular replacement to ensure production continuity. Furthermore, different plastic products have different requirements for melt flow paths, injection pressures, and nozzle diameters, necessitating the replacement of hot runner nozzles with corresponding specifications during production changeovers.

[0003] Existing nozzles are mostly fixed in a rigid manner using bolts, flanges, etc. Disassembly requires loosening multiple fasteners one by one, which is a narrow operating space and a complicated process. Each replacement often requires a lot of manpower and downtime. Especially in multi-variety, small-batch production scenarios, frequent nozzle replacements lead to excessively long production preparation cycles, which seriously affect production efficiency. To address this, we propose an injection mold with a convenient nozzle structure for replacement. Utility Model Content

[0004] The purpose of this invention is to provide an injection mold that facilitates the replacement of nozzle structures, thereby solving the problems mentioned in the background art, such as narrow operating space, cumbersome steps, and the need for a large amount of manpower and downtime for each replacement.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an injection mold with a convenient nozzle structure replacement, comprising: a hot run nozzle and an upper mold;

[0006] It also includes: a connecting plate, a snap-fit ​​component fixedly connected to the top of the connecting plate, a push rod provided on one side of the snap-fit ​​component, a locking component sleeved on the surface of the push rod, the locking component being fixedly connected inside the upper mold, and the locking component restricting the position of the hot run nozzle;

[0007] The movable component is located on one side of the connecting plate. A connecting rod is fixedly connected to one side of the movable component, and an abutment is fixedly connected to one end of the connecting rod. The abutment fixes the hot flow nozzle.

[0008] The snap-fit ​​component is disposed on the surface of the hot flow nozzle, and the surface of the snap-fit ​​component is provided with a prism panel. The interior of the snap-fit ​​component is provided with a first slot that is adapted to the hot flow nozzle.

[0009] One end of the push rod has a uniformly serrated groove, and the edge plate contacts the serrated groove at one end of the push rod.

[0010] The push rod has a second slot inside that is compatible with the hot flow nozzle, and a limit plate is fixedly connected to the surface of the push rod. The limit plate is slidably connected inside the locking component.

[0011] The locking component has an internal groove that matches the limiting plate, and the surface of the locking component has notches of varying depths, so that the edge panels can be engaged in the notches of the locking component.

[0012] The bottom of the connecting plate is fixedly connected to a fixing spring, one end of which is fixedly connected to a support plate, which is fixedly connected inside the upper mold.

[0013] The connecting plate has a first placement groove on its surface that is adapted to the moving part, and a compression spring is fixedly connected to one end of the moving part.

[0014] The connecting plate has a stepped circular groove inside, and the compression spring is fixedly connected inside the stepped circular groove. The connecting plate also has a second placement groove that matches the abutment plate.

[0015] The movable part is a ladder plate, and one side of the upper mold is an inclined surface. The upper mold is adapted to the movable part.

[0016] The movable part is a semi-circular arc plate, and one side of the interior of the upper mold is an arc surface. The upper mold is adapted to the movable part.

[0017] This utility model has at least the following beneficial effects:

[0018] This invention utilizes a snap-fit ​​and locking mechanism to eliminate the need to disassemble multiple fasteners individually when replacing nozzles. Simply push the prism panel with a push rod to disengage from the notch in the locking mechanism. Under the elastic force of the fixing spring, the axial locking is released. Simultaneously, the compressed spring pushes the moving part to reset, causing the contacting part to separate from the nozzle and releasing the lateral clamping. The entire process requires no complex tools and the operation steps are simplified, effectively solving the problems of narrow operating space and cumbersome steps in traditional structures. It significantly shortens the time for a single nozzle replacement, especially in multi-variety, small-batch production scenarios, significantly reducing the production preparation cycle. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the three-dimensional disassembled structure of this utility model;

[0020] Figure 2 This is a three-dimensional disassembled structural diagram of the hot channel flow nozzle of this utility model;

[0021] Figure 3 This is a top view cross-sectional structural diagram of the connecting plate of this utility model;

[0022] Figure 4 This is a partially enlarged cross-sectional view of the present invention, which is a structural schematic diagram.

[0023] Figure 5 This is an enlarged cross-sectional structural diagram of Embodiment 2 of this utility model.

[0024] In the diagram: 1. Hot run nozzle; 2. Upper mold; 3. Connecting plate; 4. Snap-fit ​​component; 5. Push rod; 6. Locking component; 7. Moving component; 8. Connecting rod; 9. Abutting component; 10. Rib panel; 11. Limiting plate; 12. Fixing spring; 13. Support plate; 14. Compression spring. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1

[0027] Please see Figures 1 to 5 This utility model provides a technical solution: an injection mold with a convenient nozzle structure replacement, comprising: a hot run nozzle 1 and an upper mold 2;

[0028] It also includes: a connecting plate 3, a snap-fit ​​4 fixedly connected to the top of the connecting plate 3, a push rod 5 provided on one side of the snap-fit ​​4, a locking member 6 sleeved on the surface of the push rod 5, the locking member 6 fixedly connected to the inside of the upper mold 2, and the locking member 6 restricting the position of the hot run nozzle 1;

[0029] Movable component 7 is located on one side of connecting plate 3. A connecting rod 8 is fixedly connected to one side of movable component 7. An abutment component 9 is fixedly connected to one end of connecting rod 8. The abutment component 9 fixes the hot flow nozzle 1.

[0030] Hot run nozzle 1 is a key channel for melt flow during injection molding, which directly affects the injection molding quality. Upper mold 2, as the basic frame of the mold, provides installation reference and working space for all auxiliary components and is the main load-bearing structure of the entire fixed structure.

[0031] The connecting plate 3 is the core carrier connecting various fixed components. The top is fixed with the connecting snap-fit ​​4, and the bottom is connected to the support plate 13 via a fixing spring 12. The support plate 13 is fixed inside the upper mold 2. The fixing spring 12 provides elastic restoring force; when the nozzle is disassembled, the spring force pushes the connecting plate 3 back to its original position, facilitating the release of the locking state. The snap-fit ​​4 is a key component for initially fixing the hot-running nozzle 1. It has a first slot inside that matches the hot-running nozzle 1, achieving initial positioning through the fit between the slot and the nozzle surface. The snap-fit ​​4 has a ridged panel on its surface. 10 is the core structure that works with push rod 5 and locking component 6 to achieve locking. The shape design of the prism panel 10 ensures stability during locking. The locking component 6 is sleeved on the surface of push rod 5 and fixed inside the upper mold 2. It is the core locking component that restricts the position of hot run nozzle 1. One end of push rod 5 has a uniformly serrated groove. The prism panel 10 of the snap fastener 4 contacts the groove and transmits force through the meshing of the two. The inside of push rod 5 has a second slot that matches the hot run nozzle 1. This does not affect the installation and passage of the nozzle and can also limit the nozzle circumferentially.

[0032] The snap-fit ​​part 4 is disposed on the surface of the hot flow nozzle 1. The surface of the snap-fit ​​part 4 is provided with a prism panel 10. The interior of the snap-fit ​​part 4 is provided with a first slot that is adapted to the hot flow nozzle 1.

[0033] The first slot inside the snap-fit ​​part 4 fits into the nozzle surface to achieve initial radial positioning; the ridge panel 10 on the surface is the locking core, which engages with the serrated groove of the push rod 5 and snaps into the notch of the locking part 6 to achieve axial locking.

[0034] One end of the push rod 5 has a uniformly serrated groove, and the prism plate 10 is in contact with the serrated groove at one end of the push rod 5.

[0035] The serrated groove at one end of the push rod 5 engages with the ridge panel 10 of the snap-fit ​​part 4, transmitting the movement of the connecting plate 3 to the locking structure. The limiting plate 11 on the surface slides along the groove of the locking part 6, ensuring that the push rod 5 moves smoothly only along the axial direction and avoiding locking deviation.

[0036] The push rod 5 has a second slot inside that is adapted to the hot flow nozzle 1. The surface of the push rod 5 is fixedly connected to a limiting plate 11, which is slidably connected inside the locking member 6.

[0037] The locking member 6 has a sliding groove inside that matches the limiting plate 11, and the surface of the locking member 6 has notches of varying depths, so that the prism panel 10 can be snapped into the notches of the locking member 6.

[0038] The core design of the locking component 6 is the notches of varying depths on its surface. The prism panel 10 can be inserted into notches of different depths to achieve: ① different locking forces (deeper notches provide a more stable lock and are suitable for high-pressure conditions; shallower notches are suitable for light loads); ② adaptability to different nozzle sizes (the difference in nozzle size is compensated by adjusting the locking position).

[0039] A fixing spring 12 is fixedly connected to the bottom of the connecting plate 3, and a support plate 13 is fixedly connected to one end of the fixing spring 12. The support plate 13 is fixedly connected inside the upper mold 2.

[0040] The fixed spring 12 connects the support plate 13 and the connecting plate 3. Under normal conditions, it pushes the connecting plate 3 upward to reset. When disassembling, it provides core elastic force to help the prism panel 10 disengage from the notch of the locking member 6.

[0041] The surface of the connecting plate 3 is provided with a first placement groove that is adapted to the moving part 7, and a compression spring 14 is fixedly connected to one end of the moving part 7.

[0042] The connecting plate 3 has a stepped circular groove inside, and the compression spring 14 is fixedly connected inside the stepped circular groove. The connecting plate 3 also has a second placement groove that matches the abutment plate.

[0043] When the compression spring 14 is installed, it is compressed by the moving part 7 to store elastic force. When disassembling, the moving part 7 is pushed to reset, which causes the contact part 9 to separate from the nozzle and release the lateral clamping.

[0044] The movable part 7 is set in the first placement groove of the connecting plate 3, and one end of it is fixedly connected to the compression spring 14. The stepped circular groove inside the connecting plate 3 provides installation space for the compression spring 14, which can prevent the spring from being misaligned during the extension and contraction process. The movable part 7 is fixedly connected to the abutment 9 through the connecting rod 8. The second placement groove inside the connecting plate 3 provides movement space for the abutment 9. The abutment 9 directly contacts the hot flow nozzle 1 to achieve lateral fixation of the nozzle.

[0045] The movable part 7 is a ladder plate, and one side of the interior of the upper mold 2 is an inclined surface. The upper mold 2 is adapted to the movable part 7.

[0046] The movable part 7 is a ladder plate (with inclined surface) or a semi-circular arc plate (with arc surface), which is adapted to the corresponding surface of the upper mold 2. When it is squeezed, it moves along the first placement groove of the connecting plate 3. The connecting rod 8 transmits the movement of the movable part 7 to the abutting part 9. The abutting part 9 directly contacts the surface of the hot flow nozzle 1 and achieves auxiliary fixation of the nozzle through lateral force to prevent radial shaking.

[0047] The movable part 7 is designed as a ladder plate, with one side of the upper mold 2 being an inclined surface. The upper mold 2 and the movable part 7 are adapted to each other. When the mold is assembled, the inclined or curved surface of the upper mold 2 will squeeze the movable part 7, causing the movable part 7 to move along the first placement groove. Then, through the connecting rod 8, the contact part 9 will move closer to and clamp towards the hot flow nozzle 1.

[0048] Example 2

[0049] In this second embodiment, the other structures remain unchanged. The difference from the first embodiment is that the movable part 7 is a semi-circular arc plate, and one side of the interior of the upper mold 2 is an arc surface. The upper mold 2 is adapted to the movable part 7.

[0050] The movable part 7 is designed as a semi-circular arc plate, corresponding to the inner arc surface of the upper mold 2. The upper mold 2 and the movable part 7 are adapted to each other. When the nozzle is disassembled, the compression spring 14 returns to its original position and pushes the movable part 7 to move in the opposite direction. The contact part 9 then releases the nozzle, achieving quick disassembly. This structure uses the mold's own assembly force to achieve clamping, eliminating the need for additional locking operations and greatly improving replacement efficiency.

[0051] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0052] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An injection mold that facilitates the replacement of nozzle structures, comprising: Hot runner nozzle and upper mold; The feature is that it further includes: a connecting plate, the top of which is fixedly connected to a snap-fit ​​component, a push rod is provided on one side of the snap-fit ​​component, a locking component is sleeved on the surface of the push rod, the locking component is fixedly connected to the inside of the upper mold, and the locking component restricts the position of the hot run nozzle; A movable component is disposed on one side of a connecting plate. A connecting rod is fixedly connected to one side of the movable component, and an abutment is fixedly connected to one end of the connecting rod. The abutment fixes the hot flow nozzle.

2. The injection mold with a convenient nozzle structure replacement according to claim 1, characterized in that: The snap-fit ​​component is disposed on the surface of the hot flow nozzle, the surface of the snap-fit ​​component is provided with a prism panel, and the interior of the snap-fit ​​component is provided with a first slot adapted to the hot flow nozzle.

3. The injection mold with a convenient nozzle structure replacement according to claim 2, characterized in that: One end of the push rod has a uniformly serrated groove, and the prism plate is in contact with the serrated groove at one end of the push rod.

4. The injection mold with a convenient nozzle structure replacement according to claim 1, characterized in that: The push rod has a second slot inside that is adapted to the hot flow nozzle, and a limiting plate is fixedly connected to the surface of the push rod. The limiting plate is slidably connected inside the locking member.

5. The injection mold with a convenient nozzle structure replacement according to claim 3, characterized in that: The locking component has an internal groove that matches the limiting plate, and the surface of the locking component has notches of varying depths. All the edge panels can be engaged in the notches of the locking component.

6. The injection mold with a convenient nozzle structure replacement according to claim 1, characterized in that: A fixing spring is fixedly connected to the bottom of the connecting plate, and a support plate is fixedly connected to one end of the fixing spring. The support plate is fixedly connected inside the upper mold.

7. The injection mold with a convenient nozzle structure replacement according to claim 1, characterized in that: The surface of the connecting plate is provided with a first placement groove that is adapted to the moving part, and a compression spring is fixedly connected to one end of the moving part.

8. The injection mold with a convenient nozzle structure replacement according to claim 7, characterized in that: The connecting plate has a stepped circular groove inside, and the compression spring is fixedly connected inside the stepped circular groove. The connecting plate also has a second placement groove that matches the abutment plate.

9. The injection mold with a convenient nozzle structure replacement according to claim 1, characterized in that: The movable component is a ladder plate, and one side of the interior of the upper mold is an inclined surface. The upper mold is adapted to the movable component.

10. The injection mold with a convenient nozzle structure replacement according to claim 1, characterized in that: The movable component is a semi-circular arc plate, and one side of the interior of the upper mold is an arc surface. The upper mold is adapted to the movable component.

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