Injection mold for barrel packing box

Abstract

The utility model relates to an injection mold for a barrel packing box, and belongs to the technical field of injection molds. The forming part, the fixed mold plate and the annular piece jointly define a closed forming cavity, a sliding groove is formed in the annular piece, a sliding block in sliding connection is arranged in the sliding groove, an embedding part is arranged at one end of the sliding block, the embedding part can be inserted into the forming cavity in a sliding mode, an inserting groove is formed in the top of the sliding block, an oblique outward pushing part is arranged on one side of the inserting groove, and a reset slope is arranged on the other side of the inserting groove. A fixedly-connected insertion block is arranged on the fixed mold plate and is in sliding connection with the insertion groove; according to the scheme, when the movable mold plate and the fixed mold plate are opened and separated, the core pulling work of the sliding block can be synchronously completed, demolding can be conducted after the mold is opened, the production efficiency is improved, a core pulling mechanism is optimized, core pulling through an external air cylinder is not needed, and the manufacturing cost of the mold is reduced.

Description

An injection mold for a cylindrical packaging box Technical Field

[0001] This utility model belongs to the field of injection mold technology, and relates to an injection mold for a cylindrical packaging box. Background Technology

[0002] Injection molds are devices used to produce plastic products. Plastic raw materials are heated to a molten state and injected into the molding cavity inside the mold. After the cavity is filled, the mold is cooled to allow the molten plastic to solidify, forming a plastic product with a specific structure. Using injection molds to produce plastic products offers advantages such as high precision and high efficiency. Cylindrical packaging boxes are mainly used in the takeout industry. Since cylindrical containers are made of plastic, they can be produced using injection molds.

[0003] With societal development, people are paying more attention to the safety and health of takeout food. As a result, anti-theft tags have appeared on packaging boxes. If the anti-theft tag is not removed, the packaging box cannot be opened, and if the tag is removed, the box is restored, greatly improving the safety of food delivery. However, the existing cylindrical production molds still have some shortcomings. They have a core-pulling mechanism on the outside of the mold. During demolding, a cylinder is needed to pull the slider used to form the anti-theft tag structure. The complex core-pulling mechanism increases the manufacturing cost of the mold and reduces production efficiency because it requires waiting for the cylinder to pull the core. Summary of the Invention

[0004] The purpose of this utility model is to address the problems existing in the current technology by proposing an injection mold for cylindrical packaging boxes. The technical problem to be solved by this utility model is: how to improve the production efficiency of cylindrical injection molds.

[0005] The objective of this utility model can be achieved through the following technical solution: An injection mold for a cylindrical packaging box includes a top plate, a flow divider plate, a fixed template, a moving template, and a bottom plate arranged in sequence. The moving template has an outwardly protruding forming part inside. A slidably connected annular component is arranged around the bottom outer side of the forming part. The forming part, the fixed template, and the annular component together form a closed forming cavity. A groove is provided inside the annular component. A slider is slidably connected inside the groove. One end of the slider has an embedding part that can be slidably inserted into the forming cavity. The top of the slider has a slot. One side of the slot has an obliquely outwardly pushing part, and the other side has a reset inclined surface. A fixedly connected insert is provided on the fixed template. The insert is slidably connected to the slot.

[0006] In this design, the molding cavity is used to form cylindrical products. The insert on the slider is inserted laterally into the molding cavity, forming an anti-theft buckle structure on the cylinder. During the cylinder demolding process, the moving template opens the molding cavity. When the moving template separates from the fixed template, the insert on the fixed template is pulled out from the groove. The insert can abut against the inclined outward push part, thereby pushing the slider to move away from the molding cavity, pulling the insert out of the molding cavity, and then pushing the bottom annular part to push the cylinder off the molding part. During the mold closing process, the insert abuts against the bottom reset inclined surface, thereby pushing the slider to move to one side of the molding cavity, realizing the automatic reset function. Through the above method, the core pulling work of the slider can be completed simultaneously during the separation of the moving template and the fixed template, so that demolding can be carried out after the mold is opened, improving production efficiency. Furthermore, the core pulling mechanism has been optimized, eliminating the need for external cylinder core pulling and reducing the mold manufacturing cost.

[0007] In the injection mold of the aforementioned cylindrical packaging box, a wear-resistant block is fixedly attached to the side of the insert block near the reset inclined surface. The wear-resistant block abuts against the reset inclined surface, and the outward pushing part is inclined towards the side near the insert block. The wear-resistant block on the insert block pushes the slider to reset, improving its service life. Because the outward pushing part is inclined towards the side near the insert block, when the insert block is pulled out horizontally, it can drive the slider to move outward.

[0008] In the injection mold of the aforementioned cylindrical packaging box, the annular component is provided with a fixed limiting block, which is located on both sides of the slide groove. The slider has sliding portions on both sides, and these sliding portions are slidably connected to the bottom of the limiting block. The limiting block and the sliding portions cooperate to allow the slider to slide within the slide groove.

[0009] In the injection mold of the aforementioned cylindrical packaging box, a cylindrical body is injection molded inside the molding cavity. An anti-theft buckle is located on the top of the cylindrical body, and several connecting parts are provided between the anti-theft buckle and the cylindrical body. The cylindrical body is formed inside the molding cavity. Because the inserting part is inserted into the molding cavity, an anti-theft buckle structure is formed on the cylindrical body. The connecting parts allow the anti-theft buckle to be easily broken off.

[0010] In the injection mold for the aforementioned cylindrical packaging box, the top plate is provided with a feed inlet, the manifold plate has a manifold channel inside, the bottom of the feed inlet is connected to the manifold channel, the fixed mold plate has a nozzle inside, the bottom of the manifold channel is connected to the nozzle, and the bottom of the nozzle is connected to the molding cavity. Molten plastic heated to a molten state is injected from the feed inlet, and after being divided by the manifold channel, it flows evenly into the nozzle and is injected into the molding cavity by the nozzle.

[0011] In the injection mold of the aforementioned cylindrical packaging box, a heating element is fixedly installed inside the fixed mold plate. The heating element has a heating wire, and the heating element is arranged around the outside of the nozzle. The heating wire provides heating, keeping the molten liquid inside the nozzle fluid.

[0012] In the injection mold of the aforementioned cylindrical packaging box, the base plate is equipped with a slidingly connected push plate, and the push plate is provided with several push rods, which are fixedly connected to the annular component. The push plate can drive the push rods to move upward, thereby pushing the annular component out from below the molding part and pushing the barrel body on the molding part to demold.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] 1. In this solution, the core pulling of the slider can be completed simultaneously during the separation of the moving template and the fixed template, so that the mold can be demolded immediately after it is opened, which improves production efficiency. Furthermore, the core pulling mechanism has been optimized, eliminating the need for external cylinder core pulling and reducing the manufacturing cost of the mold. Attached Figure Description

[0015] Figure 1 is a three-dimensional structural diagram of this utility model;

[0016] Figure 2 is a front view cross-sectional structural diagram of the feed inlet of this utility model;

[0017] Figure 3 is a partial enlarged structural diagram of Figure 2;

[0018] Figure 4 is a three-dimensional cross-sectional view of the internal open state of the moving template and the push rod of this utility model.

[0019] Figure 5 is a three-dimensional structural diagram of the slider of this utility model;

[0020] Figure 6 is a three-dimensional structural diagram of the barrel body of this utility model.

[0021] In the diagram, 1 is the top plate; 1a is the feed inlet; 2 is the flow divider plate; 2a is the flow channel; 3 is the fixed template; 3a is the nozzle; 3b is the heating element; 3c is the insert block; 3c1 is the wear-resistant block; 4 is the moving template; 4a is the forming part; 5 is the bottom plate; 6 is the ring part; 6a is the slide groove; 6b is the limiting block; 7 is the forming cavity; 7a is the barrel body; 7b is the anti-theft buckle; 7c is the connecting part; 8 is the slider; 8a is the embedded part; 8b is the slot; 8c is the push part; 8d is the reset slope; 8e is the sliding part; 9 is the push plate; 9a is the push rod. Detailed Implementation

[0022] 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.

[0023] Example

[0024] As shown in Figure 1, the injection mold for the cylindrical packaging box includes a top plate 1, a flow divider plate 2 fixedly connected to the rear of the top plate 1, a fixed template 3 fixedly connected to the rear of the flow divider plate 2, a slidingly connected moving template 4 to the rear of the moving template 4, a bottom plate 5 fixedly connected to the rear of the moving template 4, and a feed inlet 1a on the top plate 1.

[0025] As shown in Figures 2 and 3, the moving template 4 has a forming part 4a protruding towards the fixed template 3. The bottom of the outer side of the forming part 4a is surrounded by a slidingly connected annular part 6. The forming part 4a, the fixed template 3, and the annular part 6 together form a closed forming cavity 8. The flow divider 2 has a flow divider channel inside. The bottom of the feed inlet 1a is connected to the flow divider channel. The fixed template 3 has a nozzle 3a inside. The bottom of the flow divider channel is connected to the nozzle 3a. The bottom of the nozzle 3a is connected to the forming cavity 8. The fixed template 3 has a fixed heating element 3b inside. The heating element 3b has a heating wire and is arranged around the outside of the nozzle 3a.

[0026] As shown in Figures 3 and 4, the annular part 6 has a groove 6a inside, and a slider is slidably connected inside the groove 6a. One end of the slider has an embedding part 8a, which can be slidably inserted into the molding cavity 8. The top of the slider has a slot 8b, and one side of the slot 8b has an inclined outward pushing part 8c. The outward pushing part 8c is inclined towards the side close to the insert block 3c. The other side of the slot 8b has a reset inclined surface 8d. The fixed template 3 has a fixed insert block 3c, which is slidably connected to the slot 8b. The side of the insert block 3c close to the reset inclined surface 8d has a fixed wear-resistant block 3c1, which abuts against the reset inclined surface 8d.

[0027] As shown in Figure 4 and Figure 5, the base plate 5 is provided with a slidingly connected push plate 9. The push plate 9 is provided with a plurality of push rods 9a. The push rods 9a are fixedly connected to the annular part 6. The annular part 6 is provided with a fixedly connected limiting block 6b. The limiting block 6b is provided on both sides of the slide groove 6a. The slider is provided with a sliding part 8e on both sides. The sliding part 8e is slidably connected to the bottom of the limiting block 6b.

[0028] As shown in Figure 6, the molding cavity 8 is provided with an injection-molded barrel body, the top of the barrel body is provided with an anti-theft buckle, and there are several connecting parts between the anti-theft buckle and the barrel body.

[0029] The working principle of this scheme is as follows, as shown in Figure 1-6: Molten plastic, heated to a molten state, is injected into the inlet 1a. After being diverted by the flow divider, it flows evenly into the nozzle 3a and is injected into the molding cavity 8. After the molding cavity 8 is filled, the mold is rapidly cooled to allow the plastic material to cool and solidify. Then, the moving platen 4 is moved to open the molding cavity 8. When the moving platen 4 separates from the fixed platen 3, the insert 3c on the fixed platen 3 is pulled out from the slide groove 6a. The insert 3c can engage with... The inclined outward push part 8c abuts against the mold, thereby pushing the slider to move away from the molding cavity 8, pulling the embedded part 8a out of the molding cavity 8. Then, by pushing the push plate 9, the push rod 9a pushes the ring part 6 out from the bottom of the molding part 4a, pushing the barrel body off the molding part 4a and completing the demolding. When the mold is closed for the next injection, the wear-resistant block 3c1 on the insert 3c abuts against the bottom reset inclined surface 8d, thereby pushing the slider to move to one side of the molding cavity 8, realizing the automatic reset function.

[0030] In this way, the core-pulling operation of the slider can be completed simultaneously during the separation of the moving template 4 and the fixed template 3, so that demolding can be carried out immediately after the mold is opened, which improves production efficiency. Furthermore, the core-pulling mechanism has been optimized, eliminating the need for external cylinder core-pulling and reducing the manufacturing cost of the mold.

[0031] 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.

[0032] Although this document frequently uses terms such as 1. top plate; 1a. feed inlet; 2. flow divider; 2a. flow channel; 3. fixed template; 3a. nozzle; 3b. heating element; 3c. insert block; 3c1. wear-resistant block; 4. moving template; 4a. forming part; 5. bottom plate; 6. ring part; 6a. groove; 6b. limiting block; 7. forming cavity; 7a. barrel body; 7b. anti-theft buckle; 7c. connecting part; 8. slider; 8a. embedding part; 8b. slot; 8c. push part; 8d. reset slope; 8e. sliding part; 9. push plate; 9a. push rod, 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 cylindrical packaging box, comprising a top plate (1), a flow divider plate (2), a fixed template (3), a movable template (4), and a bottom plate (5) arranged sequentially, wherein the movable template (4) has an outwardly protruding molding part (4a) inside, and a slidingly connected annular member (6) is arranged around the bottom outer side of the molding part (4a), and the molding part (4a), the fixed template (3), and the annular member (6) together enclose a closed molding cavity (7), characterized in that, The annular part (6) has a groove (6a) inside, and a slider (8) is slidably connected inside the groove (6a). One end of the slider (8) has an embedding part (8a) that can be slidably inserted into the molding cavity (7). The top of the slider (8) has a slot (8b). One side of the slot (8b) has an inclined outward push part (8c), and the other side has a reset inclined surface (8d). The fixed template (3) has a fixed insert (3c) that is slidably connected to the slot (8b).

2. The injection mold for a cylindrical packaging box according to claim 1, characterized in that, A wear-resistant block (3c1) is fixedly connected to the side of the insert (3c) near the reset slope (8d). The wear-resistant block (3c1) abuts against the reset slope (8d), and the push-out part (8c) is inclined to the side near the insert (3c).

3. The injection mold for a cylindrical packaging box according to claim 2, characterized in that, The annular component (6) is provided with a fixed limiting block (6b), which is located on both sides of the slide groove (6a). The slider (8) is provided with sliding parts (8e) on both sides, which are slidably connected to the bottom of the limiting block (6b).

4. The injection mold for a cylindrical packaging box according to claim 1, characterized in that, The molding cavity (7) is provided with an injection-molded barrel (7a), the top of the barrel (7a) is provided with an anti-theft buckle (7b), and a number of connecting parts (7c) are provided between the anti-theft buckle (7b) and the barrel (7a).

5. The injection mold for a cylindrical packaging box according to claim 1, characterized in that, The top plate (1) is provided with a feed inlet (1a), the flow divider plate (2) is provided with a flow divider channel (2a), the bottom of the feed inlet (1a) is connected to the flow divider channel (2a), the fixed template (3) is provided with a nozzle (3a), the bottom of the flow divider channel (2a) is connected to the nozzle (3a), and the bottom of the nozzle (3a) is connected to the molding cavity (7).

6. The injection mold for a cylindrical packaging box according to claim 5, characterized in that, The fixed template (3) is provided with a heating element (3b) fixed inside, and the heating element (3b) is provided with a heating wire. The heating element (3b) is arranged around the outside of the nozzle (3a).

7. The injection mold for a cylindrical packaging box according to claim 1, characterized in that, The base plate (5) is provided with a slidingly connected push plate (9), and the push plate (9) is provided with a plurality of push rods (9a), which are fixedly connected to the ring part (6).

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