An adjustable flow channel plastic mold

Abstract

This utility model relates to the field of plastic mold equipment technology, and provides a plastic mold with an adjustable flow channel, including a main body of equipment. The main body includes an upper mold base, a lower mold base, and a feed pipe. The feed pipe is installed on the upper mold base, which has a feed inlet and an installation cavity. An adjustment structure is also included, comprising blades, an arc plate, and a rotating ring. Each arc plate has two ends respectively rotatably connected to one corner of each blade and the inner wall of the rotating ring. The other corner of the blade is rotatably connected to the inner wall of the installation cavity. In this utility model, the rotating ring drives the arc plate to rotate synchronously, changing the angle between the arc plate and the rotating ring, which in turn drives the blades to rotate synchronously. Each blade rotates around the point where it rotates to the inner wall of the installation cavity, increasing or decreasing the gap between the blades, thereby adjusting the amount of molten plastic fed through the feed pipe.

Description

Technical Field

[0001] This utility model belongs to the technical field of plastic mold equipment, and in particular relates to a plastic mold with an adjustable flow channel. Background Technology

[0002] Plastic molds are a type of combined mold used for compression molding, extrusion molding, injection molding, blow molding, and low-temperature foaming molding. Through the coordinated changes of the mold's punch and die and auxiliary molding system, a series of plastic parts of different shapes and sizes can be processed. It is a key tool in the plastics processing industry that is used in conjunction with plastic molding machines, and it can give plastic products a complete structure and precise dimensions.

[0003] According to the search, Chinese Patent (Publication No.: CN215039844U) discloses a plastic mold with an adjustable flow channel structure, including a lower mold and a connecting mechanism disposed on the upper surface of the lower mold, a feeding mechanism disposed on the upper surface of the upper mold, and a mold removal mechanism disposed inside the lower mold. During the injection process using the feeding cylinder, gas is injected into the sealing airbag, which causes the sealing airbag to slowly expand, thereby reducing the diameter of the feeding cylinder and achieving the purpose of controlling the feeding amount. Furthermore, an electric push rod is used to move the sealing plate to the connection point, thereby achieving the effect of immediate material blocking, preventing excessive feeding, and improving the product molding quality.

[0004] However, the repeated expansion and contraction of the sealing airbag during injection molding may lead to material fatigue, rupture, or air leakage with long-term use, making it impossible to stably control the feed rate. Although airbag expansion can reduce the diameter of the feed cylinder, this adjustment method is difficult to achieve high-precision flow control. Different batches of materials, temperature changes, or fluctuations in injection pressure may all affect the consistency of airbag expansion, resulting in unstable feed rate and affecting product quality. Therefore, an adjustable flow channel plastic mold is needed to solve the above problems. Utility Model Content

[0005] The purpose of this utility model embodiment is to provide a plastic mold with an adjustable flow channel to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An adjustable flow channel plastic mold, comprising:

[0008] The main body of the equipment includes an upper mold base, a lower mold base, and a feed pipe. The feed pipe is installed on the upper mold base, and the upper mold base is vertically and flexibly installed at a predetermined distance above the lower mold base. The upper mold base has a feed port that communicates with the feed pipe, and the upper mold base has a mounting cavity that communicates with the feed port.

[0009] The adjustment structure includes multiple blades, multiple arc-shaped plates, and a rotating ring. Each blade has an arc-shaped sidewall that fits against each other. The multiple blades and arc-shaped plates are circumferentially distributed around the center of the feed inlet. Each arc-shaped plate has two ends rotatably connected to one corner of each blade and the inner wall of the rotating ring. The other corner of each blade is rotatably connected to the inner wall of the mounting cavity. The rotating ring is rotatably mounted in the mounting cavity. Both the blades and arc-shaped plates are disposed within the mounting cavity.

[0010] In a further technical solution, the rotating ring has multiple circumferentially distributed arc-shaped grooves, and the upper mold base has multiple circumferentially distributed fixing posts on the inner wall of the mounting cavity. Each fixing post is placed in each arc-shaped groove, and the side wall of each fixing post is in contact with the inner wall of each arc-shaped groove.

[0011] In a further technical solution, the rotating ring is configured as a gear on the side wall away from the arc plate. The adjustment structure also includes a rotating gear and a driving component. The output shaft of the driving component is connected to the rotating gear. The rotating gear meshes with the gear-shaped side wall of the arc plate. The rotating gear is rotatably mounted on the inner wall of the mounting cavity. The driving component is mounted on the upper mold base.

[0012] In a further technical solution, the adjustment structure also includes a locking plate, the sidewall of which meshes with the gear-shaped sidewall of the arc-shaped plate, and the locking plate is movably installed inside the mounting cavity.

[0013] In a further technical solution, the upper mold base has a sliding column on the inner wall of the mounting cavity, the adjustment structure further includes a rotating screw, the upper mold base has a threaded hole, the locking plate is slidably inserted into the sliding column, one end of the rotating screw is rotatably mounted on the locking plate, and the rotating screw is threadedly connected to the threaded hole.

[0014] In a further technical solution, the main body of the equipment also includes a sealing strip. The upper mold base has a placement groove on the inner wall of the mounting cavity near the feed pipe. The sealing strip is placed in the placement groove. The sealing strip is made of a high-temperature resistant material and is in contact with the blade.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention features an adjustment structure comprising blades, an arc-shaped plate, and a rotating ring. Each blade has an arc-shaped section on its adjacent sidewalls that fits snugly against each other. Each arc-shaped plate has two ends rotatably connected to one corner of each blade and the inner wall of the rotating ring. The other corner of each blade is rotatably connected to the inner wall of the mounting cavity. The rotating ring is rotatably mounted in the mounting cavity. Both the blades and the arc-shaped plate are located within the mounting cavity. The rotating ring drives the arc-shaped plate to rotate synchronously, changing the angle between the arc-shaped plate and the rotating ring. This, in turn, causes the blades rotatably connected to the other end of the arc-shaped plate to rotate synchronously, changing the angle between the arc-shaped plate and the blades. Each blade rotates around the point where it rotatably connects to the inner wall of the mounting cavity, increasing or decreasing the gap between the blades. Molten plastic flows through the gap between the blades from the feed inlet between the upper and lower mold bases. By incorporating the blades and the rotating ring, the amount of molten plastic fed through the feed pipe can be adjusted.

[0017] This invention features a locking plate whose sidewall meshes with the gear-shaped sidewall of an arc-shaped plate. The locking plate is movably installed inside the mounting cavity. The upper mold base has a sliding column on the inner wall of the mounting cavity. The adjustment structure also includes a rotating screw. The upper mold base has a threaded hole. The locking plate is slidably inserted into the sliding column. One end of the rotating screw is rotatably mounted on the locking plate, and the rotating screw is threadedly connected to the threaded hole. When the rotating ring needs to be fixed after adjustment, the worker rotates the rotating screw, causing the locking plate, which is rotatably connected to the rotating screw, to slide along the axial direction of the sliding column and towards the rotating ring until the locking plate meshes with the gear-shaped sidewall of the rotating ring. By setting the locking plate, the rotating ring is fixed in the adjusted position, thus ensuring normal feeding.

[0018] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0020] Figure 2 This is a cross-sectional view of the present invention;

[0021] Figure 3 This is a structural diagram of the adjustment structure of this utility model;

[0022] Figure 4 This is a partial exploded view of the present invention.

[0023] In the diagram: 1. Main body of the equipment; 11. Upper mold base; 111. Feed inlet; 112. Mounting cavity; 113. Fixed column; 114. Sliding column; 115. Threaded hole; 116. Placement groove; 12. Lower mold base; 13. Feed pipe; 14. Sealing strip; 2. Adjustment structure; 21. Blade; 22. Arc plate; 23. Rotating ring; 231. Arc groove; 24. Rotating gear; 25. Driving component; 26. Locking plate; 27. Rotating screw. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0025] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0026] like Figures 1 to 4 As shown, this utility model embodiment provides a plastic mold with an adjustable flow channel, comprising:

[0027] The main body of the equipment 1 includes an upper mold base 11, a lower mold base 12 and a feed pipe 13. The feed pipe 13 is installed on the upper mold base 11. The upper mold base 11 is vertically and flexibly installed at a predetermined distance above the lower mold base 12. The upper mold base 11 has a feed port 111 that communicates with the feed pipe 13 and a mounting cavity 112 that communicates with the feed port 111.

[0028] Adjustment structure 2 includes multiple blades 21, multiple arc plates 22, and a rotating ring 23. Each blade 21 has an arc shape on its adjacent sidewalls and fits together. The multiple blades 21 and multiple arc plates 22 are circumferentially distributed with the center of the feed inlet 111 as the center. The two ends of each arc plate 22 are rotatably connected to one corner of each blade 21 and the inner wall of the rotating ring 23, respectively. The other corner of the blade 21 is rotatably connected to the inner wall of the mounting cavity 112. The rotating ring 23 is rotatably mounted in the mounting cavity 112. Both the blades 21 and the arc plates 22 are set in the mounting cavity 112.

[0029] In this embodiment, the rotating ring 23 drives multiple arc-shaped plates 22 to rotate synchronously, changing the angle between the arc-shaped plates 22 and the rotating ring 23. This causes the blades 21, which are rotatably connected to the other end of the arc-shaped plates 22, to also rotate synchronously, changing the angle between the arc-shaped plates 22 and the blades 21. Each blade 21 rotates around the point where it rotates to connect with the inner wall of the mounting cavity 112, increasing or decreasing the gap between the multiple blades 21. At this time, molten plastic flows from the feed inlet 111 between the upper mold base 11 and the lower mold base 12 through the gap between the multiple blades 21. By setting multiple blades 21 and the rotating ring 23, the amount of molten plastic fed through the feed pipe 13 can be adjusted.

[0030] Specifically, the rotating ring 23 has a plurality of circumferentially distributed arc-shaped grooves 231, and the upper mold base 11 has a plurality of circumferentially distributed fixing posts 113 on the inner wall of the mounting cavity 112. Each fixing post 113 is placed in each arc-shaped groove 231, and the side wall of each fixing post 113 is in contact with the inner wall of each arc-shaped groove 231.

[0031] In this embodiment, when the rotating ring 23 rotates, the relative position of each fixed post 113 in the arc groove 231 changes. By setting the fixed posts 113, the rotation range of the rotating ring 23 is limited.

[0032] Specifically, the rotating ring 23 is gear-shaped on the side wall away from the arc plate 22. The adjustment structure 2 also includes a rotating gear 24 and a driving member 25. The output shaft of the driving member 25 is connected to the rotating gear 24. The rotating gear 24 meshes with the gear-shaped side wall of the arc plate 22. The rotating gear 24 is rotatably mounted on the inner wall of the mounting cavity 112. The driving member 25 is mounted on the upper mold base 11.

[0033] In this embodiment, after startup, the drive unit 25 drives the rotating gear 24 to rotate, which in turn drives the rotating ring 23 to rotate; by setting the rotating gear 24 and the drive unit 25, the automation level of the equipment is improved;

[0034] Specifically, the adjustment structure 2 also includes a locking plate 26, the side wall of the locking plate 26 meshes with the gear-shaped side wall of the arc plate 22, and the locking plate 26 is movably installed inside the mounting cavity 112.

[0035] Specifically, the upper mold base 11 has a sliding column 114 on the inner wall of the mounting cavity 112, the adjustment structure 2 also includes a rotating screw 27, the upper mold base 11 has a threaded hole 115, the locking plate 26 is slidably inserted into the sliding column 114, one end of the rotating screw 27 is rotatably mounted on the locking plate 26, and the rotating screw 27 is threadedly connected to the threaded hole 115.

[0036] In this embodiment, when the rotating ring 23 needs to be fixed after adjustment, the worker rotates the rotating screw 27, which in turn drives the locking plate 26, which is rotatably connected to the rotating screw 27, to slide along the axial direction of the slide column 114 and toward the rotating ring 23, until the locking plate 26 meshes with the gear-shaped sidewall of the rotating ring 23; by setting the locking plate 26, the rotating ring 23 is fixed in the adjusted position, thereby ensuring that the feeding is carried out normally;

[0037] Specifically, the main body 1 of the equipment also includes a sealing strip 14. The upper mold base 11 has a placement groove 116 on the inner wall of the mounting cavity 112 near the feed pipe 13. The sealing strip 14 is placed in the placement groove 116. The sealing strip 14 is made of high temperature resistant material and is in contact with the blade 21.

[0038] In this embodiment, a sealing strip 14 is provided to prevent molten plastic flowing from the feed inlet 111 from seeping between the inner wall of the blade 21 and the mounting cavity 112 and damaging other mechanisms, thereby extending the service life of the equipment.

[0039] The working principle of this utility model is as follows:

[0040] In the initial state, the locking plate 26 is separated from the gear-shaped sidewall of the rotating ring 23. When it is necessary to adjust the amount of molten plastic entering between the upper mold base 11 and the lower mold base 12 through the feed pipe 13 according to actual needs, the activated drive component 25 drives the rotating gear 24 to rotate, thereby driving the rotating ring 23 to rotate. By setting the rotating gear 24 and the drive component 25, the automation level of the equipment is improved. At this time, the relative position of each fixed column 113 in the arc groove 231 changes. By setting the fixed column 113, the rotation range of the rotating ring 23 is limited.

[0041] The rotating ring 23 drives multiple arc-shaped plates 22 to rotate synchronously, changing the angle between the arc-shaped plates 22 and the rotating ring 23. This causes the blades 21, which are rotatably connected to the other end of the arc-shaped plates 22, to also rotate synchronously, changing the angle between the arc-shaped plates 22 and the blades 21. Each blade 21 rotates around the point where it rotates to connect with the inner wall of the mounting cavity 112, increasing or decreasing the gap between the multiple blades 21. At this time, molten plastic flows from the feed port 111 between the upper mold base 11 and the lower mold base 12 through the gap between the multiple blades 21. By setting multiple blades 21 and the rotating ring 23, the feeding amount of molten plastic through the feed pipe 13 can be adjusted.

[0042] When the rotating ring 23 needs to be fixed after adjustment, the worker rotates the rotating screw 27, which in turn drives the locking plate 26, which is rotatably connected to the rotating screw 27, to slide along the axis of the slide column 114 and toward the rotating ring 23, until the locking plate 26 meshes with the gear-shaped sidewall of the rotating ring 23; by setting the locking plate 26, the rotating ring 23 is fixed in the adjusted position, thereby ensuring that the feeding is carried out normally.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A plastic mold with an adjustable flow channel, characterized in that, include: The main body of the equipment (1) includes an upper mold base (11), a lower mold base (12) and a feed pipe (13). The feed pipe (13) is installed on the upper mold base (11). The upper mold base (11) is vertically installed at a predetermined distance above the lower mold base (12). The upper mold base (11) has a feed port (111) that communicates with the feed pipe (13) and a mounting cavity (112) that communicates with the feed port (111). The adjustment structure (2) includes multiple blades (21), multiple arc plates (22), and a rotating ring (23). Each blade (21) is set in an arc shape on adjacent sidewalls and fits together. The multiple blades (21) and multiple arc plates (22) are circumferentially distributed with the center of the feed inlet (111) as the center. The two ends of each arc plate (22) are respectively rotatably connected to one corner of each blade (21) and the inner wall of the rotating ring (23). The other corner of the blade (21) is rotatably connected to the inner wall of the mounting cavity (112). The rotating ring (23) is rotatably mounted in the mounting cavity (112). The blades (21) and the arc plates (22) are both disposed in the mounting cavity (112).

2. The adjustable flow channel plastic mold according to claim 1, characterized in that: The rotating ring (23) has a plurality of circumferentially distributed arc grooves (231), and the upper mold base (11) has a plurality of circumferentially distributed fixing posts (113) on the inner wall of the mounting cavity (112). Each fixing post (113) is placed in each arc groove (231), and the side wall of each fixing post (113) is in contact with the inner wall of each arc groove (231).

3. The adjustable flow channel plastic mold according to claim 2, characterized in that: The rotating ring (23) is gear-shaped on the side wall away from the arc plate (22). The adjustment structure (2) also includes a rotating gear (24) and a driving member (25). The output shaft of the driving member (25) is connected to the rotating gear (24). The rotating gear (24) meshes with the gear-shaped side wall of the arc plate (22). The rotating gear (24) is rotatably mounted on the inner wall of the mounting cavity (112). The driving member (25) is mounted on the upper mold base (11).

4. A plastic mold with an adjustable flow channel according to claim 3, characterized in that: The adjustment structure (2) further includes a locking plate (26), the sidewall of which meshes with the gear-shaped sidewall of the arc plate (22), and the locking plate (26) is movably installed inside the mounting cavity (112).

5. A plastic mold with an adjustable flow channel according to claim 4, characterized in that: The upper mold base (11) has a sliding column (114) on the inner wall of the mounting cavity (112). The adjustment structure (2) also includes a rotating screw (27). The upper mold base (11) has a threaded hole (115). The locking plate (26) is slidably inserted into the sliding column (114). One end of the rotating screw (27) is rotatably mounted on the locking plate (26). The rotating screw (27) is threadedly connected to the threaded hole (115).

6. A plastic mold with an adjustable flow channel according to claim 4, characterized in that: The main body of the equipment (1) also includes a sealing strip (14). The upper mold base (11) has a placement groove (116) on the inner wall of the mounting cavity (112) near the feed pipe (13). The sealing strip (14) is placed in the placement groove (116). The sealing strip (14) is made of high temperature resistant material. The sealing strip (14) is in contact with the blade (21).

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