Mold structure for injection molding of elbow-shaped cigarette holder

Abstract

A mold structure for injection molding of a bent pipe-shaped cigarette holder relates to the technical field of injection molding and comprises an upper mold and a lower mold, the upper mold and the lower mold are closed to form a molding cavity, an arc-shaped insert is arranged in the molding cavity and comprises a fixing part and a bent pipe part, and a demolding channel for the bent pipe part to enter and exit from the molding cavity is arranged on one side of the molding cavity. A core pulling mechanism for driving the arc-shaped insert to enter and exit from the molding cavity from the demolding channel is arranged in the lower mold; the core-pulling mechanism comprises an arc-shaped rail formed in the lower die, a sliding block insert in sliding fit with the arc-shaped rail, a swing rod rotationally connected to the sliding block insert, a linear sliding block rotationally connected to the end, away from the sliding block insert, of the swing rod, and a driving piece used for driving the linear sliding block to do linear motion. By the adoption of the technical scheme, the production requirement of the bent-pipe-shaped cigarette holder can be met, the structure is compact, practicability is high, and the good market popularization prospect is achieved.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to a mold structure for injection molding of bent tube-shaped cigarette nozzles. Background Technology

[0002] The mouthpiece is a crucial part of an e-cigarette's structure and the component that comes into most direct contact with the user during use. Common mouthpiece shapes include round, flat, angled, and curved. Among these, the curved mouthpiece, with its unique design, is increasingly favored by users because it is more comfortable to hold and reduces the amount of smoke blowing directly into the face.

[0003] In the prior art, injection molds are usually used to produce bent tube products. At the same time, in order to facilitate demolding, a bent tube demolding structure is set in the injection mold. For example, CN117047993A discloses a bent tube demolding structure for a bent tube forming mold, including a power component and a demolding guide rail. A demolding slider is provided on the output end of the power component. The end of the demolding slider away from the power component is connected to a linkage component. Multiple curved sliders are sleeved on the linkage component. The demolding guide rail has curved sliders, and the end of the demolding guide rail passing through the curved sliders is provided with an arc-shaped guide part.

[0004] However, the tube bending demolding structure disclosed in CN117047993A requires driving the demolding slider and the bending slider to slide out of the product cavity along the length of the demolding guide rail. The movement distance is long. In order to avoid the tube bending demolding mechanism occupying a large space, it can generally only be used in injection molds for some plastic pipes with short tube bending lengths, which is difficult to meet the production needs of bent tube cigarette nozzles. Utility Model Content

[0005] The purpose of this invention is to solve the problem that the existing bending tube demolding structure has a long movement distance and can only be used in injection molds for plastic pipe fittings with short bending tube lengths, which makes it difficult to meet the production needs of bent tube cigarette holders. This invention provides a mold structure for injection molding of bent tube cigarette holders.

[0006] The technical solution adopted by this utility model is: a mold structure for injection molding of a curved cigarette holder, characterized in that it includes an upper mold and a lower mold, wherein the upper mold and the lower mold are closed to form a molding cavity, and an arc-shaped insert adapted to the shape and size of the curved cigarette holder is provided in the molding cavity. The arc-shaped insert includes a fixing part and a curved part. A demolding channel is provided on one side of the molding cavity for the curved part of the arc-shaped insert to enter and exit the molding cavity. A core-pulling mechanism is provided in the lower mold for driving the arc-shaped insert to enter and exit the molding cavity from the demolding channel.

[0007] The core-pulling mechanism includes an arc-shaped track opened in the lower mold, a slider insert that slides with the arc-shaped track, a rocker arm rotatably connected to the slider insert, a linear slider rotatably connected to the end of the rocker arm away from the slider insert, and a drive component for driving the linear slider to move linearly. One end of the arc-shaped track is located at the end of the demolding channel away from the molding cavity, and the other end extends in an arc to the bottom of the molding cavity. The fixing part of the arc-shaped insert is fixedly connected to the side of the slider insert facing the molding cavity.

[0008] Optionally, the lower mold has an installation cavity, and there are two sets of arc-shaped tracks. The two sets of arc-shaped tracks are symmetrically arranged on two opposite inner walls of the installation cavity. Both ends of the slider insert are provided with arc-shaped sliders for sliding cooperation with the arc-shaped tracks.

[0009] Optionally, the rocker arm is inclined, with its top end rotatably connected to the middle of the bottom side of the slider insert, and its bottom end rotatably connected to the middle of the linear slider near the middle of the slider insert.

[0010] Optionally, a linear slide groove is provided inside the mounting cavity, the linear slide groove is located below the molding cavity, and the linear slider is slidably connected in the linear slide groove.

[0011] Optionally, the driving component includes a hydraulic cylinder, the cylinder body of which is fixedly connected to the side wall of the lower mold, and the piston rod of which extends into the mounting cavity and is fixedly connected to the side of the linear slider away from the swing arm.

[0012] Optionally, the upper mold has a glue inlet channel, and the fixing part of the arc-shaped insert has a glue inlet hole. The first end of the glue inlet hole is connected to the glue inlet channel, and the second end of the glue inlet hole is connected to the molding cavity.

[0013] Optionally, the glue inlet channel includes a linear acceleration section and a curved nozzle section that are smoothly connected vertically. The linear acceleration section is connected to the glue inlet channel, and the curved nozzle section is connected to the molding cavity.

[0014] Optionally, the linear acceleration section for glue injection is connected to the glue injection channel on the top side of the fixed part of the arc-shaped insert, and the curved nozzle section for glue injection is connected to the molding cavity on the bottom side of the fixed part of the arc-shaped insert.

[0015] Optionally, the inner diameter of the demolding channel is set to gradually decrease towards the molding cavity, and the minimum inner diameter of the demolding channel is greater than the maximum inner diameter of the molding cavity.

[0016] After adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0017] In this application, during demolding, the upper and lower molds are first separated. A driving component then moves a linear slider away from the slider insert, causing a rocker arm to move. This moves the slider insert along the arc of the curved track from the demolding channel to the bottom of the molding cavity, causing the curved section of the insert to slide out of the molding cavity. This allows the injection-molded product to separate from the curved insert, achieving demolding. The curved insert's movement trajectory is arc-shaped, and its compact structure meets the production requirements of curved cigarette holders, offering wide applicability and strong practicality. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0020] Figure 2 This is a cross-sectional view of this embodiment;

[0021] Figure 3 This is a schematic diagram illustrating the cooperation relationship between the core-pulling mechanism and the upper and lower mold cores;

[0022] Figure 4 This is a schematic diagram illustrating the assembly relationship between the slider insert and the arc insert;

[0023] Figure 5 yes Figure 3 A cross-sectional view;

[0024] Figure 6 yes Figure 5 A partial view;

[0025] Figure 7 yes Figure 6 Enlarged view of section A.

[0026] Explanation of reference numerals in the attached drawings: 10. Upper mold; 11. Upper mold core; 12. Inlet channel; 20. Lower mold; 21. Lower mold core; 22. Mounting cavity; 221. Linear slide; 30. Molding cavity; 31. Arc-shaped insert; 311. Fixing part; 312. Bend part; 40. Demolding channel; 50. Core pulling mechanism; 51. Arc-shaped track; 52. Slider insert; 521. Arc-shaped slider; 53. Rocker arm; 54. Linear slider; 55. Hydraulic cylinder; 60. Inlet channel; 61. Linear acceleration section for inlet; 62. Curved nozzle section for inlet. Detailed Implementation

[0027] The following will refer to the appendix in the embodiments of this utility model. Figure 1-7 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0028] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0029] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0030] This embodiment relates to a mold structure for injection molding of curved cigarette nozzles, referring to... Figures 1-7 The system includes an upper mold 10 and a lower mold 20. The upper mold 10 and the lower mold 20 are closed to form a molding cavity 30. An arc-shaped insert 31 with a curved tube-shaped mouthpiece and matching its shape and size is provided in the molding cavity 30. The arc-shaped insert 31 includes a fixing part 311 and a curved part 312. A demolding channel 40 is provided on one side of the molding cavity 30 for the curved part 312 of the arc-shaped insert 31 to enter and exit the molding cavity 30. A core-pulling mechanism 50 is provided in the lower mold 20 for driving the arc-shaped insert 31 to enter and exit the molding cavity 30 through the demolding channel 40.

[0031] Specifically, the core-pulling mechanism 50 includes an arc-shaped track 51 opened in the lower mold 20, a slider insert 52 that slides and engages with the arc-shaped track 51, a rocker arm 53 rotatably connected to the slider insert 52, a linear slider 54 rotatably connected to the end of the rocker arm 53 away from the slider insert 52, and a drive component for driving the linear slider 54 to move linearly. One end of the arc-shaped track 51 is located at the end of the demolding channel 40 away from the molding cavity 30, and the other end of the arc-shaped track 51 extends to the bottom of the molding cavity 30. The slider insert 52 can slide along the arc direction of the arc-shaped track 51, and the fixing part 311 of the arc-shaped insert 31 is fixedly connected to the side of the slider insert 52 facing the molding cavity 30.

[0032] It should be noted that during injection molding, the fixing part 311 of the arc-shaped insert 31 is located in the demolding channel 40 and seals the connection between the demolding channel 40 and the molding cavity 30. The bent part 312 of the arc-shaped insert 31 extends into the molding cavity 30. The area between the bent part 312 of the arc-shaped insert 31 and the molding cavity 30 is the injection molding area of ​​the bent tube product. After injection molding, the bent part 312 of the arc-shaped insert 31 is located inside the bent tube product.

[0033] During demolding, the linear slider 54 is driven by the drive component to move away from the slider insert 52, which in turn moves the rocker arm 53. This causes the slider insert 52 to slide along the arc of the arc track 51. At this time, the slider insert 52 drives the arc insert 31 to move, causing the bent part 312 of the arc insert 31 to rotate out of the molding cavity 30. This separates the bent part 312 of the arc insert 31 from the bent tube product in the molding cavity 30, thus achieving demolding.

[0034] In addition, the mold structure provided in this embodiment also includes an upper mold core 11 and a lower mold core 21. The upper mold core 11 and the lower mold core 21 are respectively disposed on the upper mold 10 and the lower mold 20. When the mold is closed, the upper mold core 11 and the lower mold core 21 cooperate to form a plurality of the above-mentioned forming cavities 30. The number of arc-shaped inserts 31 corresponds to the number of forming cavities 30, and the plurality of arc-shaped inserts 31 are fixedly connected to the slider insert 52.

[0035] Understandably, by adopting the above settings, a single mold can simultaneously form multiple bent tube products and demold multiple bent tube products at the same time, thereby improving production efficiency.

[0036] Furthermore, the lower mold 20 has an installation cavity 22, and there are two sets of arc-shaped tracks 51. The two sets of arc-shaped tracks 51 are symmetrically arranged on two opposite inner walls of the installation cavity 22. Both ends of the slider insert 52 are provided with arc-shaped sliders 521 for sliding cooperation with the arc-shaped tracks 51.

[0037] The two sets of arc-shaped tracks 51 cooperate with the arc-shaped sliders 521 at both ends of the slider insert 52, ensuring a tight fit between the slider insert 52 and the arc-shaped tracks 51. This guarantees the stability of the movement path of the arc-shaped insert 31 and prevents damage caused by collision between the arc-shaped insert 31 and the inner wall of the molding cavity 30 or the demolding channel 40 when it slides out of the molding cavity 30. Furthermore, it should be noted that during demolding, the bent portion 312 of the arc-shaped insert 31 rotates out of the molding cavity 30 and enters the demolding channel 40 under the drive of the slider insert 52. That is, the bent portion 312 of the arc-shaped insert 31 is fully inserted into the molding cavity 30 when the mold is closed, and is located within the demolding channel 40 during demolding.

[0038] Furthermore, the rocker arm 53 is inclined, with its top end rotatably connected to the middle of the bottom side of the slider insert 52, and its bottom end rotatably connected to the middle of the linear slider 54 on the side near the slider insert 52.

[0039] By rotating the two ends of the rocker arm 53 to the middle of the slider insert 52 and the linear slider 54 respectively, the rocker arm 53 can stably transmit the force of the driving component acting on the linear slider 54 to the slider insert 52, thereby driving the slider insert 52 to slide stably along the arc direction of the arc track 51, and thus enabling the arc insert 31 to stably enter and exit the molding cavity 30.

[0040] Furthermore, a linear slide groove 221 is provided inside the mounting cavity 22. The linear slide groove 221 is located below the molding cavity 30, and the linear slide groove 221 is slidably connected in the linear slide groove 221.

[0041] The cooperation between the linear groove 221 and the linear slider 54 enables the linear slider 54 to move stably along the length of the linear groove 221 under the action of the driving component, thus ensuring the stability of the entire core-pulling mechanism 50.

[0042] Furthermore, the driving component includes a hydraulic cylinder 55, the cylinder body of which is fixedly mounted on the side wall of the lower mold 20, and the piston rod of the hydraulic cylinder 55 extends into the mounting cavity 22 and is fixedly connected to the end of the linear slider 54 away from the rocker arm 53.

[0043] By driving the hydraulic cylinder 55 to extend and retract, the linear slider 54 is moved along the length of the linear groove 221 towards or away from the slider insert 52, thereby causing the slider insert 52 to move back and forth along the arc of the arc guide rail, and in turn causing the arc insert 31 to extend into or slide out of the mounting cavity 22. The structure is simple and the power transmission is stable.

[0044] Furthermore, the upper mold 10 is provided with a glue inlet channel 12, and the fixing part 311 of the arc-shaped insert 31 is provided with a glue inlet hole 60. The first end of the glue inlet hole 60 is connected to the glue inlet channel 12, and the second end of the glue inlet hole 60 is connected to the molding cavity 30.

[0045] Compared to the traditional injection molding method where the injection channel 12 is directly connected to the molding cavity 30, by opening an injection hole 60 on the fixing part 311 of the arc-shaped insert 31, which connects the injection channel 12 and the molding cavity 30, the molten plastic enters the molding cavity 30 through the injection hole 60. This transfers the sprue from the surface of the bent tube product to the inner wall, ensuring the integrity of the bent tube product's appearance, improving its aesthetic appeal, and eliminating the need for a sprue removal process, thus simplifying the production process and reducing production costs.

[0046] Furthermore, the glue inlet channel 60 includes a glue inlet linear acceleration section 61 and a glue inlet curved tip section 62 that are smoothly connected vertically. The glue inlet linear acceleration section 61 is connected to the glue inlet channel 12, and the glue inlet curved tip section 62 is connected to the molding cavity 30.

[0047] By setting the linear acceleration section 61 for the injection, the flow rate of the molten plastic can be accelerated. The curved nozzle section 62 for the injection can inject the plastic into the molding cavity 30 at an inclined angle, avoiding backflow of plastic and reducing the formation of sprue burrs, thereby further improving the molding quality of the product.

[0048] Furthermore, the linear acceleration section 61 of the glue injection is connected to the glue injection channel 12 on the top side of the fixing part 311 of the arc-shaped insert 31, and the curved tip section 62 of the glue injection is connected to the molding cavity 30 on the bottom side of the fixing part 311 of the arc-shaped insert 31.

[0049] Understandably, through the above settings, the molten plastic in the injection channel 12 enters the injection linear acceleration section 61 of the injection channel 60 from the top of the fixing part 311 of the arc-shaped insert 31, and then is injected into the molding cavity 30 from the bottom of the fixing part 311 of the arc-shaped insert 31, thus achieving fast and stable injection.

[0050] Furthermore, the inner diameter of the demolding channel 40 is gradually reduced towards the molding cavity 30, and the minimum inner diameter of the demolding channel 40 is greater than the maximum inner diameter of the molding cavity 30.

[0051] With the above settings, when the arc-shaped insert 31 slides out of the molding cavity 30, it can block the product inside the molding cavity 30, preventing the bent tube product from moving out of the molding cavity 30 together with the arc-shaped insert 31, thereby improving the demolding quality and reducing defects in the bent tube product.

[0052] The above is only used to illustrate the technical solution of this utility model and not to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A mold structure for injection molding of bent-tube cigarette holders, characterized in that, The device includes an upper mold (10) and a lower mold (20). The upper mold (10) and the lower mold (20) are closed to form a molding cavity (30). An arc-shaped insert (31) adapted to the shape and size of the curved cigarette holder is provided in the molding cavity (30). The arc-shaped insert (31) includes a fixing part (311) and a curved part (312). A demolding channel (40) is provided on one side of the molding cavity (30) for the curved part (312) of the arc-shaped insert (31) to enter and exit the molding cavity (30). A core-pulling mechanism (50) is provided in the lower mold (20) for driving the arc-shaped insert (31) to enter and exit the molding cavity (30) from the demolding channel (40). The core-pulling mechanism (50) includes an arc-shaped track (51) opened in the lower mold (20), a slider insert (52) that slides with the arc-shaped track (51), a rocker arm (53) rotatably connected to the slider insert (52), a linear slider (54) rotatably connected to the end of the rocker arm (53) away from the slider insert (52), and a driving component for driving the linear slider (54) to move linearly. One end of the arc-shaped track (51) is located at the end of the demolding channel (40) away from the molding cavity (30), and the other end extends in an arc to the bottom of the molding cavity (30). The fixing part (311) of the arc-shaped insert (31) is fixedly connected to the side of the slider insert (52) facing the molding cavity (30).

2. The mold structure for injection molding of a bent-tube cigarette holder according to claim 1, characterized in that, The lower mold (20) has an installation cavity (22) inside. There are two sets of arc-shaped tracks (51). The two sets of arc-shaped tracks (51) are symmetrically arranged on two opposite inner walls of the installation cavity (22). Both ends of the slider insert (52) are provided with arc-shaped sliders (521) for sliding cooperation with the arc-shaped tracks (51).

3. The mold structure for injection molding of a bent-tube cigarette holder according to claim 2, characterized in that, The swing rod (53) is inclined, and the top end of the swing rod (53) is rotatably connected to the middle of the bottom side of the slider insert (52), and the bottom end of the swing rod (53) is rotatably connected to the middle of the side of the linear slider (54) near the slider insert (52).

4. The mold structure for injection molding of a bent-tube cigarette holder according to claim 2, characterized in that, The mounting cavity (22) is provided with a linear slide groove (221), which is located below the molding cavity (30), and the linear slider (54) is slidably connected in the linear slide groove (221).

5. The mold structure for injection molding of a bent-tube cigarette holder according to claim 1, characterized in that, The driving component includes a hydraulic cylinder (55), the cylinder body of which is fixedly connected to the side wall of the lower mold (20), and the piston rod of the hydraulic cylinder (55) is fixedly connected to the side of the linear slider (54) away from the rocker arm (53) after extending into the mounting cavity (22).

6. The mold structure for injection molding of a bent-tube cigarette holder according to claim 1, characterized in that, The upper mold (10) is provided with a glue inlet channel (12), and the fixing part (311) of the arc-shaped insert (31) is provided with a glue inlet hole (60). The first end of the glue inlet hole (60) is connected to the glue inlet channel (12), and the second end of the glue inlet hole (60) is connected to the molding cavity (30).

7. The mold structure for injection molding of a bent-tube cigarette holder according to claim 6, characterized in that, The glue inlet channel (60) includes a glue inlet linear acceleration section (61) and a glue inlet curved tip section (62) that are smoothly connected from top to bottom. The glue inlet linear acceleration section (61) is connected to the glue inlet channel (12), and the glue inlet curved tip section (62) is connected to the molding cavity (30).

8. The mold structure for injection molding of a bent-tube cigarette holder according to claim 7, characterized in that, The linear acceleration section (61) for glue injection is connected to the glue injection channel (12) on the top side of the fixing part (311) of the arc-shaped insert (31), and the curved tip section (62) for glue injection is connected to the molding cavity (30) on the bottom side of the fixing part (311) of the arc-shaped insert (31).

9. The mold structure for injection molding of a bent-tube cigarette holder according to claim 1, characterized in that, The inner diameter of the demolding channel (40) gradually decreases towards the molding cavity (30), and the minimum inner diameter of the demolding channel (40) is greater than the maximum inner diameter of the molding cavity (30).

10. A mold structure for injection molding of a bent-tube cigarette holder according to claim 6, characterized in that, The upper mold (10) and the lower mold (20) are respectively provided with an upper mold core (11) and a lower mold core (21). The upper mold core (11) and the lower mold core (21) cooperate to form multiple molding cavities (30) when the mold is closed. The number of arc-shaped inserts (31) corresponds to the number of molding cavities (30), and multiple arc-shaped inserts (31) are fixedly connected to the slider insert (52).

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