Injection mold for a garbage can swing rod

Abstract

The utility model relates to a injection mold of garbage can swing rod belongs to injection mold technical field. Including top plate, the bottom of top plate is equipped with fixedly connected fixed mold plate, the bottom of fixed mold plate is equipped with the sliding connection of movable mold plate, the bottom of movable mold plate is equipped with fixedly connected footboard, be equipped with a plurality of same structure forming cavity between fixed mold plate and movable mold plate, the top of movable mold plate is equipped with the connecting runner of strip shape, the both sides of connecting runner are equipped with a plurality of obliquely arranged glue inlet runner, and the glue inlet runner is connected with forming cavity, and the connecting place of glue inlet runner and forming cavity is equipped with the relatively narrow glue inlet, and the both ends of connecting runner are equipped with buffer cavity, in this scheme, connecting runner is set up into strip shape to improve the length of connecting runner, make connecting runner both sides can connect more glue inlet runner, make the inside of mould can set up more forming cavity, and glue inlet can promote the pressure of solution inside glue inlet runner, improve the speed that solution fills forming cavity, make forming cavity filling more complete.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology, and relates to an injection mold for a trash can swing arm. Background Technology

[0002] Trash cans are common household items. Their structure includes a rocker arm that controls the lid's opening and closing. Since this rocker arm is made of plastic, it can be manufactured using injection molding. In the injection molding process, the plastic raw material is first heated to a molten state and then injected into the pre-designed molding cavity. Once the cavity is full, the mold is rapidly cooled, causing the molten plastic to solidify and form the desired rocker arm. Using injection molding to produce plastic products offers advantages such as high precision and high efficiency.

[0003] To improve the production efficiency of molds, multiple molding cavities with the same structure are set inside the mold. After one injection molding, multiple rocker products can be produced at the same time. However, the injection molds used to produce rocker products in the existing technology still have some shortcomings. Due to the large number of molding cavities, flow channels need to be set inside the mold to connect the molding cavities. In order to make the filling inside the molding cavity more complete, the plastic melt injected into the flow channel needs to maintain sufficient pressure. Therefore, the flow channel structure inside the mold also needs to be optimized. Summary of the Invention

[0004] The purpose of this invention is to address the problems existing in the current technology by proposing an injection mold for a trash can swing arm. The technical problem to be solved by this invention is: how to optimize the flow channel structure inside the injection mold.

[0005] The objective of this utility model can be achieved through the following technical solution: An injection mold for a trash can swing arm includes a top plate, a fixed template fixedly connected to the bottom of the top plate, a slidingly connected moving template at the bottom of the fixed template, a fixed foot plate at the bottom of the moving template, several molding cavities with identical structures between the fixed template and the moving template, a long strip-shaped connecting channel at the top of the moving template, several obliquely arranged glue inlet channels on both sides of the connecting channel, the glue inlet channels being connected to the molding cavities, a narrow glue inlet at the connection between the glue inlet channels and the molding cavities, and buffer cavities at both ends of the connecting channel.

[0006] In this design, molten plastic heated to a molten state is first injected into the connecting channel, then diverted into the injection channel, and finally fills the molding cavity through the injection port. Once the molding cavity is completely filled, the molten plastic cools to form the rocker arm product. In this structure, the connecting channel is designed as a long strip to increase its length, allowing more injection channels to be connected to both sides, thus enabling more molding cavities to be formed inside the mold. Due to the narrow injection port at the end of the injection channel, the pressure of the solution inside the channel can be increased, increasing the speed at which the solution fills the molding cavity and ensuring more complete filling. After the molding cavity is completely filled, the molten liquid can also flow into the buffer cavity to reduce the pressure inside the connecting channel, preventing the molten liquid from continuing to impact the connecting channel after the molding cavity is completely filled, thereby improving the service life of the mold.

[0007] In the injection mold of the aforementioned trash can swing arm, the injection port is conical, with the end of the injection port near the molding cavity being narrower. The conical shape of the injection port increases the pressure of the solution inside the narrower end, thereby increasing the speed at which the solution fills the molding cavity.

[0008] In the injection mold for the aforementioned trash can rocking arm, the bottom of the molding cavity has upwardly protruding molding blocks, which together form a molding groove. The interior of the molding cavity is used to form the plastic rocking arm part, and the interior of the molding groove can form reinforcing ribs integrally connected to the rocking arm to improve the structural strength of the rocking arm.

[0009] In the injection mold for the aforementioned trash can swing arm, the top plate is provided with a feed inlet, and the fixed mold plate has a feed channel inside. The top of the feed channel is connected to the feed inlet, and the bottom of the feed channel is connected to a connecting channel. The plastic raw material is first heated to a molten state, and then the molten plastic is injected from the feed inlet through an external pressurizing device. The molten plastic flows through the bottom feed channel and then into the connecting channel.

[0010] In the injection mold of the aforementioned trash can rocking arm, the feed channel is connected to the center of the connecting channel. This connection to the center allows the molten plastic to flow more evenly into the connecting channel.

[0011] In the injection mold of the aforementioned trash can rocking arm, a slidingly connected push plate is provided on the inner side of the foot plate. The push plate has several fixed ejector pins, the tops of which slidably pass through the moving mold plate and extend to the bottom of the molding cavity or connecting runner. During demolding, the push plate is pushed towards one side of the moving mold plate, causing the ejector pins to push upwards. The ejector pins extend from the bottom of the molding cavity and connecting runner, pushing the internally molded plastic part out of the mold.

[0012] In the injection mold for the aforementioned trash can rocking arm, at least two ejector pins are provided at the bottom of the molding cavity, with the ejector pins located at both ends of the molding cavity. The ejector pins extend upwards from the bottom of both ends, enabling more stable demolding of the rocking arm.

[0013] Compared with the prior art, the present invention has the following advantages: In this design, the connecting channel is designed as a long strip to increase its length, allowing more injection channels to be connected to both sides, thus enabling more molding cavities to be set inside the mold. Because the injection port at the end of the injection channel is narrow, the pressure of the solution inside the injection channel can be increased, thereby increasing the speed at which the solution fills the molding cavity and making the filling of the molding cavity more complete.

[0014] In this design, after the molding cavity is fully filled, the molten liquid can flow into the buffer cavity to reduce the pressure inside the connecting channel and prevent the molten liquid from continuing to impact the connecting channel after the molding cavity is fully filled, thereby improving the service life of the mold. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a frontal half-sectional view of the structure of this utility model; Figure 3 This is a schematic diagram of the internal structure of the moving template of this utility model; Figure 4 yes Figure 3 A magnified schematic diagram of a portion of the structure.

[0016] In the diagram, 1 is the top plate; 1a is the feed inlet; 2 is the fixed template; 2a is the feed channel; 3 is the moving template; 3a is the connecting channel; 3b is the glue inlet channel; 3b1 is the glue inlet; 3c is the buffer cavity; 4 is the foot plate; 4a is the push plate; 4b is the ejector pin; 5 is the molding cavity; 5a is the molding block; and 5b is the molding groove. Detailed Implementation

[0017] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments. Example

[0018] like Figure 1 As shown, the injection mold for the swing arm of the trash can includes a top plate 1, a fixed template 2 fixedly connected to the bottom of the top plate 1, a slidingly connected moving template 3 at the bottom of the fixed template 2, a foot plate 4 fixedly connected to the bottom of the moving template 3, a feed inlet 1a on the top plate 1, and a slidingly connected push plate 4a on the inner side of the foot plate 4.

[0019] like Figure 2As shown, the top of the moving template 3 is provided with a long strip-shaped connecting channel 3a, the inside of the fixed template 2 is provided with a feeding channel 2a, the top of the feeding channel 2a is connected to the feeding port 1a, the bottom of the feeding channel 2a is connected to the center of the connecting channel 3a, and the push plate 4a is provided with a plurality of fixed ejector pins 4b. The top of the ejector pins 4b slides through the moving template 3 and extends to the bottom of the connecting channel 3a.

[0020] like Figure 3 Combination Figure 4 As shown, several identical molding cavities 5 are provided between the fixed template 2 and the moving template 3. Several obliquely arranged glue inlet channels 3b are provided on both sides of the connecting flow channel 3a. The glue inlet channels 3b are connected to the molding cavities 5. A glue inlet 3b1 is provided at the connection between the glue inlet channel 3b and the molding cavity 5. The glue inlet 3b1 is conical and narrower at the end near the molding cavity 5. Buffer cavities 3c are provided at both ends of the connecting flow channel 3a. The bottom of the molding cavity 5 is provided with upwardly protruding molding blocks 5a. The molding blocks 5a surround each other to form a molding groove 5b. At least two ejector pins 4b are provided at the bottom of the molding cavity 5. The ejector pins 4b are respectively located at both ends of the molding cavity 5.

[0021] The working principle of this solution is as follows: Figure 1-4 As shown, the plastic raw material is heated to a molten state. The molten plastic is injected into the inlet 1a through an external pressurizing device. The molten plastic flows through the bottom inlet channel 2a, then into the connecting channel 3a and is distributed into each injection channel 3b. When the molten plastic passes through the injection port 3b1, it is pressurized and fills the molding cavity 5. Once the molding cavity 5 is completely filled, the molten plastic cools to form the rocker arm product. After the molding cavity 5 is completely filled, the mold interior is rapidly cooled to allow the molten plastic to cool and form the rocker arm structure. The moving platen 3 is then moved to open the mold, and the push plate 4a is pushed to one side of the moving platen 3. The push plate 4a drives the ejector pins 4b upwards, which extend from the bottom of the molding cavity 5 and the connecting channel 3a, pushing the internally molded plastic part out of the mold.

[0022] By designing the connecting channel 3a as a long strip to increase its length, more injection channels 3b can be connected to both sides of the connecting channel 3a, allowing for more molding cavities 5 to be set inside the mold. Because the injection port 3b1 at the end of the injection channel 3b is narrower, the pressure of the solution inside the injection channel 3b can be increased, increasing the speed at which the solution fills the molding cavity 5, resulting in more complete filling of the molding cavity 5. After the molding cavity 5 is completely filled, the molten liquid can also flow into the buffer cavity 3c to reduce the pressure inside the connecting channel 3a, preventing the molten liquid from continuing to impact the connecting channel 3a after the molding cavity 5 is completely filled, thus improving the service life of the mold.

[0023] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0024] Although this document frequently uses terms such as 1. top plate; 1a. feed inlet; 2. fixed template; 2a. feed channel; 3. moving template; 3a. connecting channel; 3b. glue inlet channel; 3b1. glue inlet; 3c. buffer cavity; 4. foot plate; 4a. push plate; 4b. ejector pin; 5. molding cavity; 5a. molding block; 5b. molding groove, etc., the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any kind of additional limitation would contradict the spirit of this utility model.

Claims

1. An injection mold for a trash can swing arm, comprising a top plate (1), a fixed template (2) fixedly connected to the bottom of the top plate (1), a slidingly connected movable template (3) at the bottom of the fixed template (2), a fixed foot plate (4) at the bottom of the movable template (3), and a plurality of molding cavities (5) with identical structures between the fixed template (2) and the movable template (3), characterized in that, The top of the moving template (3) is provided with a long strip-shaped connecting channel (3a), and several obliquely arranged glue inlet channels (3b) are provided on both sides of the connecting channel (3a). The glue inlet channel (3b) is connected to the molding cavity (5). A narrow glue inlet (3b1) is provided at the connection between the glue inlet channel (3b) and the molding cavity (5). Buffer cavities (3c) are provided at both ends of the connecting channel (3a).

2. The injection mold for a trash can rocking rod according to claim 1, characterized in that, The inlet (3b1) is conical, and the end of the inlet (3b1) near the molding cavity (5) is thinner.

3. The injection mold for a trash can rocking rod according to claim 1, characterized in that, The bottom of the molding cavity (5) is provided with an upwardly protruding molding block (5a), and the molding blocks (5a) are arranged together to form a molding groove (5b).

4. The injection mold for a trash can rocking rod according to claim 1, characterized in that, The top plate (1) is provided with a feed inlet (1a), and the fixed template (2) is provided with a feed channel (2a). The top of the feed channel (2a) is connected to the feed inlet (1a), and the bottom of the feed channel (2a) is connected to the connecting channel (3a).

5. The injection mold for a trash can rocking rod according to claim 4, characterized in that, The feed channel (2a) is connected to the center of the connecting channel (3a).

6. The injection mold for a trash can rocking rod according to claim 1, characterized in that, The foot plate (4) is provided with a sliding push plate (4a) on its inner side. The push plate (4a) is provided with a number of fixed ejector pins (4b). The top of the ejector pins (4b) slides through the moving template (3) and extends to the bottom of the molding cavity (5) or the connecting channel (3a).

7. The injection mold for a trash can rocking rod according to claim 6, characterized in that, At least two ejector pins (4b) are provided at the bottom of the molding cavity (5), and the ejector pins (4b) are respectively located at both ends of the molding cavity (5).

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