Injection molding machine, injection molding mold for preventing material column breakage, and working method thereof

Abstract

The present application belongs to the technical field of plastic injection molding, and particularly relates to an injection mold for preventing the breakage of a material column of an injection molded part during mold opening, and more particularly to an injection molding machine, an injection mold for preventing the breakage of a material column of the injection molding machine, and a working method of the injection mold. The injection mold for preventing the breakage of a material column of the injection molding machine comprises an upper mold and a lower mold. The upper mold is provided with an injection port in communication with an injection cavity. An injection pipe is arranged in the injection port. The end of the injection pipe is provided with a pushing portion. After the cooling of the injection molded part, the pushing portion of the injection pipe is driven by an external injection head to push the material column of the injection molded part away from the injection pipe during mold opening. The end of the injection pipe is provided with the pushing portion. After the cooling of the injection molded part, the pushing portion is driven by the external injection head to actively push the material column of the injection molded part away from the injection pipe during mold opening, so as to ensure the surface quality of the injection molded part, avoid the shutdown and cleaning caused by the residual material column in the injection pipe, and improve the production efficiency.

Description

Technical Field

[0001] This invention belongs to the field of plastic injection molding technology, specifically relating to an injection mold that prevents the material column from breaking during mold opening, and more particularly to an injection molding machine, an injection mold for the injection molding machine that prevents the material column from breaking, and a method for operating the same. Background Technology

[0002] In the injection molding process of plastic parts, the injection mold usually consists of an upper mold and a lower mold. After the mold is closed, an injection cavity is formed, and molten plastic material is injected into the injection cavity through the injection port of the upper mold. After the injection molded part cools and solidifies, the mold needs to be opened to remove the finished product.

[0003] In related technologies, a common problem during mold opening is the adhesion between the sprue and the injection tube. Because the sprue adheres tightly to the injection tube after cooling, forcibly separating it during mold opening can easily lead to sprue breakage. Broken sprue not only affects the surface quality of the molded part, causing product defects, but may also remain inside the injection tube, affecting the next injection cycle and requiring separate cleaning of the injection tube, thus reducing production efficiency.

[0004] Therefore, how to prevent the material column from breaking inside the injection tube is a technical problem that urgently needs to be solved.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore, the above description is not considered to constitute prior art information. Summary of the Invention

[0006] This disclosure provides at least one injection molding machine, an injection mold for preventing material column breakage in the injection molding machine, and a method for operating the same.

[0007] In a first aspect, embodiments of this disclosure provide an injection mold for preventing material column breakage in an injection molding machine, comprising: Upper mold and lower mold; The upper and lower molds are joined together to form an injection cavity; The upper mold has an injection port that communicates with the injection cavity; An injection tube is provided inside the injection port; The injection tube is provided with a pushing part at its end; After the injection molded part cools down, the external injection head drives the pusher of the injection tube to separate the material column of the injection molded part from the injection tube at the same time as the mold is opened.

[0008] In one alternative embodiment, the injection tube includes: An outer tube, which is inserted into the injection port from the top of the upper mold; An inner tube is inserted into the outer tube, and the inner tube is in contact with the outer tube; The pushing part is slidably connected to the outer tube and rotatably connected to the inner tube; When the external injection head drives the inner tube to rotate, the pushing part slides away from the outer tube to push the material column of the injection molded part to separate from the inner tube.

[0009] In one optional embodiment, the pushing portion is annular; Furthermore, the inner wall of the pushing part is coplanar with the inner wall of the inner tube; The inner wall of the pusher is funnel-shaped, and the diameter of the end near the injection cavity is larger than the diameter of the end away from the injection cavity.

[0010] In one optional embodiment, the inner wall of the inner tube is a tapered surface; Furthermore, the diameter of the inner wall of the inner tube gradually increases from the outside to the inside; The diameter of the inner wall of the inner tube near the pushing part is the same as the diameter of the inner wall of the pushing part near the inner tube.

[0011] In one optional embodiment, an annular groove is provided on the top of the pushing portion; The inner tube is provided with a insertion ring that is adapted to the annular groove; The outer wall of the insertion ring is provided with an arc-shaped groove; The annular groove is provided with a slider that is adapted to the arc-shaped sliding groove; When the inner tube rotates, the arc-shaped sliding groove drives the pushing part to slide away from the outer tube.

[0012] In one optional embodiment, the top surface of the pushing part is provided with multiple guide posts; The guide post is inserted into the bottom of the outer tube.

[0013] In one alternative embodiment, a protrusion is provided at the top of the inner tube; When the external injection head is inserted into the inner tube, the inner tube is circumferentially fixed to the external injection head by a protrusion.

[0014] In one alternative embodiment, while the sprue of the injection molded part separates from the injection tube, the pusher pushes the middle of the top surface of the injection molded part to separate the injection molded part from the upper mold.

[0015] Secondly, embodiments of this disclosure also provide an injection molding machine, comprising: The injection molding machine body is provided with an injection head, which is mounted on the injection molding machine body via a rotating mechanism; Such as the injection mold used in the injection molding machine to prevent the material column from breaking; The injection molding machine body injects raw materials into the injection mold of the injection molding machine through the injection head to prevent the material column from breaking.

[0016] Thirdly, this disclosure also provides a method for operating an injection mold for preventing material column breakage as described above, the method comprising: The upper and lower molds are joined together; The injection head injects raw material into the injection cavity through the injection tube; Wait for the injection molded part to cool; After the injection molded part cools, the upper mold and lower mold open. At the same time as the mold is opened, the external injection head drives the pusher of the injection tube to push the material column of the injection molded part to separate from the injection tube.

[0017] The beneficial effects of this invention are that the injection molding machine, the injection mold for preventing material column breakage, and the working method thereof, by setting a pusher at the end of the injection tube, after the injection part cools and at the same time as the mold is opened, the external injection head drives the pusher to actively push the material column of the injection part to separate from the injection tube, thus ensuring the surface quality of the injection part, avoiding downtime for cleaning due to material column residue in the injection tube, and thereby improving production efficiency.

[0018] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 A cross-sectional view of an injection mold for preventing material column breakage in an injection molding machine, provided in an embodiment of this disclosure; Figure 2 A cross-sectional view of the injection tube provided in an embodiment of this disclosure; Figure 3 A cross-sectional view of the upper mold provided in an embodiment of this disclosure; Figure 4A schematic diagram showing the injection tube pushing the injection molded part after it has been pushed by the pushing part of the injection tube according to an embodiment of this disclosure; Figure 5 This is a flowchart illustrating the working method of an injection mold for preventing material column breakage in an injection molding machine, as provided in an embodiment of this disclosure.

[0022] In the diagram: 100, upper mold; 110, injection port; 120, injection tube; 121, ejector; 1211, annular groove; 1212, slider; 122, outer tube; 123, inner tube; 1231, insert ring; 1232, arc-shaped groove; 1233, protrusion; 124, guide post; 200, lower mold; 300, injection cavity; 400, injection molded part; 410, sprue. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0025] Research has revealed a common problem of sprue sticking to the injection tube during mold opening. Because the sprue adheres tightly to the injection tube after cooling, forcibly separating it during mold opening can easily lead to sprue breakage. Broken sprue not only affects the surface quality of the molded part, causing product defects, but may also remain inside the injection tube, affecting subsequent injection processes and requiring separate cleaning of the injection tube, thus reducing production efficiency.

[0026] Based on the above research, the present disclosure provides an injection molding machine, an injection mold for preventing material column breakage, and a working method thereof. By setting a pusher at the end of the injection tube, after the injection part cools and at the same time as the mold opens, the external injection head drives the pusher to actively push the material column of the injection part to separate from the injection tube, which ensures the surface quality of the injection part and avoids downtime for cleaning due to material column residue in the injection tube, thereby improving production efficiency.

[0027] The shortcomings of the above solutions are the result of the inventors' practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed by the present disclosure embodiments in this article should be considered as contributions made by the inventors during the development of the present disclosure embodiments.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0030] Please see Figure 1 and Figure 2 At least one embodiment provides an injection mold for preventing material column breakage in an injection molding machine, comprising: an upper mold 100 and a lower mold 200; the upper mold 100 and the lower mold 200 form an injection cavity 300 after being closed; the upper mold 100 has an injection port 110 communicating with the injection cavity 300; an injection tube 120 is provided in the injection port 110; wherein, the end of the injection tube 120 is provided with a pusher 121; after the injection molded part 400 cools, at the same time as the mold is opened, the external injection head drives the pusher 121 of the injection tube 120 to push the material column 410 of the injection molded part 400 to separate from the injection tube 120.

[0031] By setting an ejector part 121 at the end of the injection tube 120, after the injection molded part 400 cools and at the same time as the mold opens, the ejector part 121 driven by the external injection head actively pushes the material column 410 of the injection molded part 400 to separate from the injection tube 120, which ensures the surface quality of the injection molded part 400 and avoids the downtime for cleaning caused by the material column 410 remaining in the injection tube 120, thereby improving production efficiency.

[0032] Please see Figure 2 and Figure 3 The injection tube 120 includes: an outer tube 122, which is inserted into the injection port 110 from the top of the upper mold 100; an inner tube 123, which is inserted into the outer tube 122 and is in contact with the outer tube 122; a pusher 121, which is slidably connected to the outer tube 122 and rotatably connected to the inner tube 123; the inner tube 123 is rotated by an external injection head (rotation direction as shown in the figure). Figure 2 When (as shown in F1), the pushing part 121 is slid away from the outer tube 122 (sliding direction as shown in F1). Figure 2 As shown in F2), the material column 410 of the injection molded part 400 is pushed to separate from the inner tube 123. The schematic diagram of the state before separation is shown in Figure 123. Figure 3 As shown in the diagram, the state after separation is as follows: Figure 4 As shown.

[0033] When the external injection head drives the inner tube 123 to rotate, the pusher 121 can slide along the outer tube 122 axially, making the application of the pusher force more stable and controllable, thereby pushing the material column 410 to separate from the inner tube 123. At the same time, when the inner tube 123 rotates, it accelerates the separation of the inner tube 123 from the material column 410, further reducing the probability of the material column 410 breaking.

[0034] Please see Figure 2 The pusher portion 121 is annular; and the inner wall of the pusher portion 121 is coplanar with the inner wall of the inner tube 123; wherein, the inner wall of the pusher portion 121 is trumpet-shaped, and the diameter of the end near the injection cavity 300 is larger than the diameter of the end away from the injection cavity 300.

[0035] The flared structure of the pusher 121 can apply a uniform thrust to the material column 410 when the pusher 121 pushes the material column 410 downward, making it easier for the material column 410 to come out of the injection pipe 120, and further reducing the possibility of the material column 410 breaking during the ejection process.

[0036] To facilitate the separation of the material column 410 from the inner tube 123, the inner wall of the inner tube 123 is tapered; and the diameter of the inner wall of the inner tube 123 gradually increases from the outside to the inside; wherein, the diameter of the inner wall of the inner tube 123 near the end of the pusher 121 is the same as the diameter of the inner wall of the pusher 121 near the end of the inner tube 123.

[0037] The inner tube 123 adopts a conical inner wall design, which makes it easier to separate the inner tube 123 from the material column 410. At the same time, the push part 121 covers the connection between the material column 410 and the injection part 400 for push, which can further prevent the material column 410 from breaking.

[0038] Please see Figure 2 and Figure 3 The top of the pushing part 121 is provided with an annular groove 1211; the inner tube 123 is provided with a plug ring 1231 adapted to the annular groove 1211; the outer wall of the plug ring 1231 is provided with an arc-shaped sliding groove 1232; the annular groove 1211 is provided with a slider 1212 adapted to the arc-shaped sliding groove 1232; when the inner tube 123 rotates, the pushing part 121 is driven to slide away from the outer tube 122 through the arc-shaped sliding groove 1232.

[0039] By opening an annular groove 1211 at the top of the pusher part 121, setting an insert ring 1231 with an arc-shaped sliding groove 1232 on the inner tube 123, and setting a slider 1212 adapted to the arc-shaped sliding groove 1232 in the annular groove 1211, the pusher part 121 is driven to slide axially when the inner tube 123 rotates. Through the rotation of the inner tube 123, the material column 410 is separated from the inner tube 123. Through the axial sliding of the pusher part 121, the pusher part 400 is pushed.

[0040] Please see Figure 2 and Figure 3 The top surface of the pusher 121 is provided with multiple guide posts 124; the guide posts 124 are inserted into the bottom of the outer tube 122.

[0041] The guide post 124 guides the up-and-down sliding of the push part 121, preventing the push part 121 from tilting during the sliding process, thereby ensuring that the pushing force is evenly applied to the material column 410, thus avoiding the material column 410 from tilting or breaking due to uneven local force.

[0042] Please see Figure 2 The inner tube 123 is provided with a protrusion 1233 at its top; when the external injection head is inserted into the inner tube 123, the inner tube 123 is circumferentially fixed to the external injection head by the protrusion 1233.

[0043] The inner tube 123 is snapped and fixed to the outer injection head by the protrusion 1233, so that the inner tube 123 can stably rotate with the injection head, thereby ensuring that the push part 121 can accurately perform the pushing operation, and ensuring that the push part 121 pushes the material column 410 when the mold is opened.

[0044] Please see Figure 3 and Figure 4 At the same time as the sprue 410 of the injection molded part 400 separates from the injection tube 120, the pusher 121 pushes the middle of the top surface of the injection molded part 400 to separate the injection molded part 400 from the upper mold 100.

[0045] While pushing the material column 410 to separate from the injection tube 120, the pusher 121 can also simultaneously push the middle part of the top surface of the injection molded part 400, so that the injection molded part 400 can be separated from the upper mold 100. This avoids the problem that the injection molded part 400 cannot fall off by itself due to adsorption on the upper mold 100, and further improves the continuity and efficiency of automated production.

[0046] At least one embodiment also provides an injection molding machine, comprising: an injection molding machine body having an injection head disposed on the injection molding machine body via a rotation mechanism; an injection mold for preventing material column breakage as described above; the injection molding machine body injecting raw material into the injection mold for preventing material column breakage via the injection head.

[0047] Please see Figure 5 At least one embodiment also provides a method for operating an injection mold for preventing material column breakage in an injection molding machine as described above. By providing a pusher 121 at the end of the injection tube 120, after the injection part 400 cools down and at the same time as the mold opens, the external injection head drives the pusher 121 to actively push the material column 410 of the injection part 400 to separate from the injection tube 120, thus ensuring the surface quality of the injection part 400 and avoiding downtime for cleaning caused by the material column 410 remaining in the injection tube 120, thereby improving production efficiency.

[0048] Specifically, the working method includes: S110: Upper mold 100 and lower mold 200 are joined together; S120: The injection head injects raw material into the injection cavity 300 through the injection tube 120; S130: Wait for the injection molded part to cool to 400°C; S140: After the injection molded part 400 cools, the upper mold 100 and the lower mold 200 open the mold; S150: At the same time as the mold is opened, the external injection head drives the pusher 121 of the injection tube 120 to push the material column 410 of the injection molded part 400 to separate from the injection tube 120.

[0049] In summary, this invention provides an injection molding machine, an injection mold for preventing material column breakage in the injection molding machine, and a method for operating the same. The injection mold for preventing material column breakage in the injection molding machine includes: an upper mold 100 and a lower mold 200; the upper mold 100 and the lower mold 200, when closed, form an injection cavity 300; the upper mold 100 has an injection port 110 communicating with the injection cavity 300; an injection tube 120 is provided inside the injection port 110; wherein, the end of the injection tube 120 is provided with a pusher portion 121; after the injection molded part 400 cools, simultaneously with mold opening, an external injection head drives the pusher portion 121 of the injection tube 120 to push the material column 410 of the injection molded part 400 apart from the injection tube 120. By setting an ejector part 121 at the end of the injection tube 120, after the injection molded part 400 cools and at the same time as the mold opens, the ejector part 121 driven by the external injection head actively pushes the material column 410 of the injection molded part 400 to separate from the injection tube 120, which ensures the surface quality of the injection molded part 400 and avoids the downtime for cleaning caused by the material column 410 remaining in the injection tube 120, thereby improving production efficiency.

[0050] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0051] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as a second element, component, region, layer, or segment.

[0052] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0053] In the above discussion, unless otherwise stated, when used to describe numerical values, the terms “about,” “approximately,” “basically,” etc., indicate a change of + / - 10% in that value.

[0054] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An injection mold for preventing material column breakage in an injection molding machine, characterized in that, include: Upper mold (100) and lower mold (200); The upper mold (100) and the lower mold (200) are closed to form an injection cavity (300); The upper mold (100) has an injection port (110) that communicates with the injection cavity (300). An injection tube (120) is provided inside the injection port (110); The injection tube (120) is provided with a pusher (121) at its end. After the injection molded part (400) cools down, at the same time as the mold is opened, the external injection head drives the push part (121) of the injection tube (120) to push the material column (410) of the injection molded part (400) to separate from the injection tube (120); The injection tube (120) includes: An outer tube (122) is inserted from the top of the upper mold (100) into the injection port (110); An inner tube (123) is inserted into the outer tube (122), and the inner tube (123) is in contact with the outer tube (122); The pusher (121) is slidably connected to the outer tube (122), and the pusher (121) is rotatably connected to the inner tube (123); When the external injection head drives the inner tube (123) to rotate, the push part (121) slides away from the outer tube (122) to push the material column (410) of the injection molded part (400) to separate from the inner tube (123); The top of the pusher (121) is provided with an annular groove (1211). The inner tube (123) is provided with a plug ring (1231) that is adapted to the annular groove (1211). The outer wall of the insert ring (1231) is provided with an arc-shaped groove (1232); The annular groove (1211) is provided with a slider (1212) that is adapted to the arc-shaped sliding groove (1232). When the inner tube (123) rotates, the pusher (121) is driven away from the outer tube (122) by the arc-shaped slide groove (1232).

2. The injection mold for preventing material column breakage in an injection molding machine as described in claim 1, characterized in that, The pusher part (121) is annular; Furthermore, the inner wall of the pusher (121) is coplanar with the inner wall of the inner tube (123); The inner wall of the pusher (121) is funnel-shaped, and the diameter of the end near the injection cavity (300) is larger than the diameter of the end away from the injection cavity (300).

3. The injection mold for preventing material column breakage in an injection molding machine as described in claim 2, characterized in that, The inner wall of the inner tube (123) is a conical surface; Furthermore, the diameter of the inner wall of the inner tube (123) gradually increases from the outside to the inside; The diameter of the inner wall of the inner tube (123) near the end of the pusher (121) is the same as the diameter of the inner wall of the pusher (121) near the end of the inner tube (123).

4. The injection mold for preventing material column breakage in an injection molding machine as described in claim 1, characterized in that, The top surface of the pusher (121) is provided with multiple guide columns (124). The guide post (124) is inserted into the bottom of the outer tube (122).

5. The injection mold for preventing material column breakage in an injection molding machine as described in claim 1, characterized in that, The top of the inner tube (123) is provided with a protrusion (1233). When the external injection head is inserted into the inner tube (123), the inner tube (123) is circumferentially fixed to the external injection head by the protrusion (1233).

6. The injection mold for preventing material column breakage in an injection molding machine as described in claim 1, characterized in that, While the sprue (410) of the injection part (400) separates from the injection tube (120), the pusher (121) pushes the middle of the top surface of the injection part (400) to separate the injection part (400) from the upper mold (100).

7. An injection molding machine, characterized in that, include: The injection molding machine body is provided with an injection head, which is mounted on the injection molding machine body via a rotating mechanism; An injection mold for an injection molding machine that prevents the material column from breaking, as described in any one of claims 1-6; The injection molding machine body injects raw materials into the injection mold of the injection molding machine through the injection head to prevent the material column from breaking.

8. A method for operating an injection mold for preventing material column breakage in an injection molding machine as described in any one of claims 1-6, characterized in that, The working method includes: The upper mold (100) and the lower mold (200) are joined together; The injection head injects raw material into the injection cavity (300) through the injection tube (120); Wait for the injection molded part (400) to cool; After the injection molded part (400) cools, the upper mold (100) and the lower mold (200) open. At the same time as the mold is opened, the external injection head drives the push part (121) of the injection tube (120) to push the material column (410) of the injection part (400) to separate from the injection tube (120).

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