Gas jacking mechanism for assisting demolding and injection mold

Abstract

The utility model discloses a pneumatic ejection mechanism and injection mould for assisting demoulding, the pneumatic ejection mechanism comprises a mould base assembly, a push block and an elastic piece, a gas path system for air flow to enter is arranged in the mould base assembly, the mould base assembly is provided with a cavity, the gas outlet end of the gas path system is in butt joint with the cavity, and the push block is arranged in the cavity. The push block is movably arranged on the die holder assembly and located at the air outlet end of the air path system, the elastic piece is located in the air path system and acts on the push block, the push block can block and close the air outlet end of the air path system under the action of the elastic piece, and airflow in the air path system can act on the push block. And the push block overcomes the acting force of the elastic piece under the airflow pressure effect of the air path system and moves towards the cavity so as to push a product in the cavity and open the air outlet end of the air path system. The mold is simple and reasonable in structure, can be used for demolding a product through auxiliary cooperation of two modes of blowing and pushing, is beneficial to reducing the demolding difficulty of a large product, and can be better suitable for demolding of the large product.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to an air ejector mechanism and an injection mold for assisting demolding. Background Technology

[0002] In existing injection molding processes, some polished products often encounter vacuum suction during the demolding stage. This can lead to problems such as the product adhering to the inner wall of the mold cavity, affecting demolding. A common approach to address this vacuum suction issue is to blow air between the product and the cavity wall. However, for larger products, the contact area between the product and the cavity is larger, resulting in a correspondingly larger vacuum suction area. Simply using vents for air blowing is insufficient to effectively solve the vacuum suction problem, leading to continued difficulties during demolding. Therefore, it is necessary to explore more effective solutions to address the demolding challenges of products with large contact areas. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an air ejector mechanism for assisting demolding, which assists in demolding the product by blowing air into the mold cavity and pushing the product in the mold cavity with push blocks. This helps to reduce the demolding difficulty of large products and can be well adapted to the demolding of large products.

[0004] This utility model also proposes an injection mold having the air ejector mechanism for assisting demolding.

[0005] According to a first aspect embodiment of the present invention, an air ejector mechanism for assisting demolding includes a mold base assembly, a push block, and an elastic element. The mold base assembly is provided with an air passage system for airflow entry. The mold base assembly has a cavity. The air outlet of the air passage system is connected to the cavity. The push block is movably disposed on the mold base assembly and located at the air outlet of the air passage system. The elastic element is located in the air passage system and acts on the push block. The push block can block and close the air outlet of the air passage system under the action of the elastic element. The airflow in the air passage system can act on the push block, causing the push block to overcome the force of the elastic element under the airflow pressure of the air passage system and move towards the cavity to push the product in the cavity and open the air outlet of the air passage system.

[0006] The air ejector mechanism for assisting demolding according to the embodiments of this utility model has at least the following beneficial effects: During the injection molding process, before mold opening after injection molding, an external air supply device inputs airflow into the air circuit system. Then, the mold opens. Simultaneously, the airflow is transported along the air circuit system and acts on the ejector block. Under the pressure of the airflow in the air circuit system, the ejector block overcomes the force of the elastic element and moves towards the cavity to push the product in the cavity. At the same time, the movement of the ejector block opens the air outlet of the air circuit system, allowing airflow into the cavity. Through the combined action of blowing air into the cavity and pushing the product in the cavity by the ejector block, the product is assisted in demolding. After the product is demolded, the external air supply device stops supplying air to the air circuit system, and the ejector block moves back to its original position under the action of the elastic element to seal and close the air outlet of the air circuit system. This utility model has a simple and reasonable structure. By using both blowing and pushing methods to assist in demolding the product, it helps to reduce the demolding difficulty of large products and can better adapt to the demolding of large products.

[0007] According to some embodiments of the present invention, the air passage system includes a first air passage and a second air passage. The first air passage is used to allow airflow to enter. The first air passage is connected to the second air passage. The outlet end of the second air passage is connected to the cavity. The push block is disposed at the outlet end of the second air passage. The elastic member is disposed in the second air passage. A connecting member is provided in the second air passage. The connecting member is connected to the push block. A first step is provided in the second air passage. The connecting member has an abutment portion. The two ends of the elastic member act on the abutment portion and the first step, respectively.

[0008] According to some embodiments of the present invention, the connector is a threaded component, and the connector and the push block are connected by a threaded structure. The connector can change the distance between the abutment portion and the push block by thread engagement.

[0009] According to some embodiments of the present invention, the abutting portion is disposed directly opposite the air outlet end of the first air passage.

[0010] According to some embodiments of the present invention, a second step is provided in the second air passage, and the abutting part can move to abut against the second step under the action of the airflow pressure of the air passage system.

[0011] According to some embodiments of the present invention, the elastic element is a spring and is sleeved on the connecting member.

[0012] According to some embodiments of the present invention, the air outlet end of the second airway is a flared structure, and the portion of the push block located at the air outlet end of the second airway is adapted to the shape of the air outlet end of the second airway.

[0013] According to some embodiments of the present invention, a rotation limiting structure is provided between the push block and the wall of the second air passage to restrict the push block from rotating relative to the second air passage.

[0014] According to some embodiments of the present invention, the mold base assembly includes a template, a mold core, and a sealing ring. The first air passage is disposed on the template, the cavity and the second air passage are disposed on the mold core, the template and the mold core are stacked, and the sealing ring is located between the template and the mold core and is arranged around the outer periphery of the junction of the first air passage and the second air passage.

[0015] According to a second aspect of the present invention, the injection mold includes an air ejector mechanism for assisting demolding, according to the first aspect of the present invention described above.

[0016] According to the embodiments of this utility model, the injection mold has at least the following beneficial effects: by adopting the above-mentioned air ejector mechanism for assisting demolding, it helps to reduce the demolding difficulty of large products and can better adapt to the demolding use of large products.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the injection mold structure according to an embodiment of the present invention;

[0020] Figure 2 for Figure 1 One of the cross-sectional schematic diagrams of an air ejector mechanism used to assist in demolding;

[0021] Figure 3 for Figure 1 Schematic diagram of the cross-section of the air ejector mechanism used to assist in demolding (Part 2);

[0022] Figure 4 for Figure 3 A partial structural diagram of the air ejector mechanism used to assist in demolding.

[0023] Figure label:

[0024] Mold base assembly 100, cavity 101, template 110, first air channel 111, mold core 120, second air channel 121, first step 122, second step 123, square channel section 124, sealing ring 130;

[0025] Push block 210, sealing part 211, connecting part 212, groove 213, elastic element 220, connecting part 230, abutting part 231;

[0026] Product 1. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] In the description of this utility model, it should be understood that if directional descriptions are involved, such as up, down, front, back, left, right, etc., indicating the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings, it is only for the convenience of describing this utility model and simplifying the description, and does 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 this utility model.

[0029] In the description of this utility model, if words such as several, greater than, less than, exceeding, above, below, or within appear, several means one or more, multiple means two or more, greater than, less than, exceeding, etc. are understood to exclude the number itself, and above, below, or within are understood to include the number itself.

[0030] If the terms "first" and "second" are used only to distinguish technical features, they should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0031] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0032] Reference Figure 1 , Figure 2 and Figure 3An air ejector mechanism for assisting demolding includes a mold base assembly 100, a pusher block 210, and an elastic element 220. The mold base assembly 100 has an air passage system for airflow entry and a cavity 101. The air outlet of the air passage system is connected to the cavity 101. The pusher block 210 is movably disposed on the mold base assembly 100 and located at the air outlet of the air passage system. The elastic element 220 is located in the air passage system and acts on the pusher block 210. The pusher block 210 can block and close the air outlet of the air passage system under the action of the elastic element 220. The airflow in the air passage system can act on the pusher block 210, causing the pusher block 210 to overcome the force of the elastic element 220 and move towards the cavity 101 under the action of the airflow pressure of the air passage system, so as to push the product 1 in the cavity 101 and open the air outlet of the air passage system.

[0033] Understandably, such as Figure 2 and Figure 3 As shown, the push block 210 is movable up and down at the air outlet of the air passage system and has a sealing part 211. The elastic member 220 makes the push block 210 tend to move upward, so as to seal the air outlet of the air passage system through the sealing part 211 of the push block 210, and prevent the injection fluid in the cavity 101 from entering the air passage system. During the injection molding process, before the mold is opened after injection molding, an external air supply device inputs airflow into the air circuit system. Then, the mold is opened. At the same time, the airflow is transported along the air circuit system and acts on the push block 210. Under the pressure of the airflow in the air circuit system, the push block 210 overcomes the force of the elastic element 220 and moves downward into the cavity 101 to push the product 1 in the cavity 101, separating the product 1 from the wall of the cavity 101. At the same time, the downward movement of the push block 210 opens the air outlet of the air circuit system, and the airflow enters the cavity 101. Through the combined action of blowing air into the cavity 101 and pushing the product 1 in the cavity 101 by the push block 210, the product 1 is assisted in demolding. After the product 1 is demolded, the external air supply device stops supplying air to the air circuit system, and the push block 210 moves upward and resets under the action of the elastic element 220 to block and close the air outlet of the air circuit system. This utility model has a simple and reasonable structure. It uses both air blowing and pushing methods to assist in the demolding of products, which helps to reduce the demolding difficulty of large products and can be well adapted to the demolding of large products.

[0034] In practical applications, the specific structures of the mold base assembly 100, the air circuit system, the push block 210, and the elastic element 220 can be set according to the actual needs of use. They will not be described in detail here, but will be explained in detail below.

[0035] In some embodiments, the air passage system includes a first air passage 111 and a second air passage 121. The first air passage 111 is used to allow airflow to enter. The first air passage 111 is connected to the second air passage 121. The air outlet of the second air passage 121 is connected to the cavity 101. A pusher block 210 is disposed at the air outlet of the second air passage 121. An elastic member 220 is disposed in the second air passage 121. A connector 230 is provided in the second air passage 121. The connector 230 is connected to the pusher block 210. A first step 122 is provided in the second air passage 121. The connector 230 has an abutment portion 231. The two ends of the elastic member 220 act on the abutment portion 231 and the first step 122, respectively.

[0036] Understandably, such as Figure 2 and Figure 3 As shown, the first air passage 111 is arranged laterally, and the second air passage 121 is arranged longitudinally and located below the first air passage 111. The air outlet end of the first air passage 111 extends downward and connects with the second air passage 121. A connecting member 230 and an elastic member 220 are provided in the second air passage 121. The connecting member 230 is connected to the upper side of the push block 210 and has a pushing part on its upper part. The second air passage 121 has a radially contracting first step 122, making the second air passage 121 a stepped channel structure. The two ends of the elastic member 220 act on the abutting part 231 and the first step 122 respectively, causing the connecting member 230 to have an upward tendency, thereby driving the push block 210 to move upward to block and close the air outlet end of the second air passage 121 with the sealing part 211. The above structure is simple and reasonable, and is convenient for production, assembly and use.

[0037] In practical applications, in addition to the above structure, the air passage system may also include multiple air passages or multiple air outlets set in one air passage. The two ends of the elastic element 220 may be engaged with the inner wall of the air passage at one end and welded to the push block 210 at the other end. The specific details can be changed according to the actual needs of use.

[0038] In some embodiments, the connector 230 is a threaded component, and the connector 230 is connected to the push block 210 by a threaded structure. The connector 230 can change the distance between the abutment portion 231 and the push block 210 by thread engagement.

[0039] Understandably, such as Figure 2 , Figure 3 and Figure 4As shown, the connector 230 is a bolt, the abutment part 231 is the head of the bolt, and the push block 210 has a corresponding screw hole. The connector 230 and the push block 210 are connected by a threaded structure, which is simple and provides a stable and reliable connection. In use, the connector 230 can be screwed on to change the distance between the abutment part 231 and the push block 210 through the thread engagement, thereby changing the degree of compression on the elastic element 220 and adjusting the force of the elastic element 220, making it easy to use. In practical applications, the connector 230 can also be a pin structure, connected to the push block 210 through an interference fit with a shaft hole. Alternatively, the connector 230 can also be connected to the push block 210 through a snap-fit ​​structure, such as a screw thread. The specific design can be adjusted according to actual usage requirements.

[0040] In some embodiments, the abutment portion 231 is disposed directly opposite the air outlet end of the first air passage 111. It is understood that, as Figure 2 , Figure 3 and Figure 4 As shown, the abutment portion 231 is located directly below the air outlet end of the first air passage 111, so that the airflow from the first air passage 111 can act effectively on the connector 230, thereby driving the connector 230 to move downward against the force of the elastic member 220, and driving the push block 210 downward, which is convenient for use. In actual application, the position between the abutment portion 231 and the air outlet end of the first air passage 111 can also be changed according to the actual use needs.

[0041] In some embodiments, the second air passage 121 is provided with a second step 123, and the contact portion 231 can move to contact the second step 123 under the action of the airflow pressure of the air passage system.

[0042] Understandably, such as Figure 2 , Figure 3 and Figure 4 As shown, the second air passage 121 is provided with a second step 123. When the connector 230 moves downward, the abutment part 231 moves to abut against the second step 123, thereby limiting the downward travel distance of the connector 230 and the push block 210, avoiding excessive movement and facilitating use. In practical applications, the specific structure of the second step 123 can be set according to actual usage needs.

[0043] In some embodiments, the elastic element 220 is a spring and is sleeved on the connector 230. It is understood that, as Figure 2 , Figure 3 and Figure 4As shown, the elastic element 220 is a spring, and the connecting element 230 passes through the elastic element 220, so that the elastic element 220 is sleeved on the outside of the screw of the connecting element 230. Its structure is simple and convenient for the assembly and connection of the elastic element 220. In practical applications, the elastic element 220 can also be an elastic sheet or other elastic material component, which can be set according to the actual needs of the application.

[0044] In some embodiments, the air outlet of the second air passage 121 is a flared structure, and the portion of the pusher block 210 located at the air outlet of the second air passage 121 is adapted to the shape of the air outlet of the second air passage 121.

[0045] Understandably, such as Figure 2 , Figure 3 and Figure 4 As shown, there is a gap between the outer surface of the connector 230 and the wall surface of the second air passage 121 to allow airflow to be delivered to the push block 210. The outlet end of the second air passage 121 has a flared structure, and its wall cross-section has a beveled structure. The sealing part 211 is adapted to the shape of the outlet end of the second air passage 121. This design ensures that once the push block 210 moves down, a gap is formed between the sealing part 211 and the wall surface of the outlet end of the second air passage 121, allowing airflow to be output to the cavity 101. This allows the blowing and pushing of the product to move synchronously, facilitating demolding. Specifically, the outlet end of the second air passage 121 has a square flared structure, and the outer contour of the sealing part 211 is a matching truncated pyramid structure. In practical applications, the outlet end of the second air passage 121 can also be a frustum-shaped flared structure, which can be varied according to actual needs.

[0046] In some embodiments, a rotation-limiting structure is provided between the pusher 210 and the wall of the second air passage 121 to restrict the pusher 210 from rotating relative to the second air passage 121. It is understood that, as Figure 2 , Figure 3 and Figure 4 As shown, the rotation limiting structure includes a connecting portion 212 located on the upper side of the push block 210. The transverse cross-section of the connecting portion 212 is square, and the second air passage 121 is correspondingly provided with a square channel section 124. Through the cooperation of the wall surfaces of the connecting portion 212 and the square channel section 124, the rotation of the push block 210 relative to the second air passage 121 is limited, which is beneficial to the connection of the connector 230 and also prevents the push block 210 from loosening or shifting, making it easy to use. In practical applications, the outer surface of the connecting block can be provided with a groove 213 to allow airflow to pass through. In addition to the above structural form, the rotation limiting structure can also be provided with a guide groove on the wall surface of the second air passage 121, and a guide block that cooperates with it can be provided at the connecting portion 212, thereby limiting the rotation of the push block 210 relative to the second air passage 121. The specific configuration can be set according to the actual usage requirements.

[0047] In some embodiments, the mold base assembly 100 includes a template 110, a mold core 120, and a sealing ring 130. A first air passage 111 is disposed on the template 110, a cavity 101 and a second air passage 121 are disposed on the mold core 120, the template 110 and the mold core 120 are stacked, and the sealing ring 130 is located between the template 110 and the mold core 120 and is arranged around the outer periphery of the junction of the first air passage 111 and the second air passage 121.

[0048] Understandably, such as Figure 1 , Figure 2 and Figure 3 As shown, the mold base assembly 100 includes a template 110 and a mold core 120. A first air passage 111 is located on the template 110, and a cavity 101 and a second air passage 121 are located on the mold core 120. This split structure facilitates the manufacturing and processing of the air passages, as well as the assembly of the push block 210, elastic element 220, and connecting element 230. The template 110 and mold core 120 are stacked. A sealing ring 130 is located between the template 110 and mold core 120 and is arranged around the outer periphery of the joint between the first air passage 111 and the second air passage 121, thereby sealing the joint between the first air passage 111 and the second air passage 121, reducing the possibility of air leakage, and facilitating use. In practical applications, the specific structure of the mold base assembly 100 can be set according to actual usage needs.

[0049] According to a second aspect of the present invention, an injection mold includes an air ejector mechanism for assisting demolding, according to the first aspect of the present invention described above.

[0050] According to the embodiments of the present invention, the injection mold, by employing the above-mentioned air ejector mechanism for assisting demolding, helps to reduce the demolding difficulty of large products and can better adapt to the demolding use of large products.

[0051] Since the other components of the injection mold of this utility model embodiment are known to those skilled in the art, they will not be described in detail here.

[0052] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An air-pump mechanism for assisting demolding, characterized in that, include: A mold base assembly, wherein the mold base assembly is provided with an air passage system for airflow entry, the mold base assembly is provided with a cavity, and the air outlet of the air passage system is connected to the cavity; A pusher block, which is movably disposed on the mold base assembly and located at the air outlet end of the air circuit system; An elastic element is located in the air passage system and acts on the push block. The push block can block and close the air outlet of the air passage system under the action of the elastic element. The airflow in the air passage system can act on the push block, causing the push block to overcome the force of the elastic element and move towards the cavity under the airflow pressure of the air passage system, so as to push the product in the cavity and open the air outlet of the air passage system.

2. The air-pump mechanism for assisting demolding according to claim 1, characterized in that, The air passage system includes a first air passage and a second air passage. The first air passage is used to supply airflow. The first air passage is connected to the second air passage. The air outlet of the second air passage is connected to the cavity. The push block is disposed at the air outlet of the second air passage. The elastic element is disposed in the second air passage. A connector is provided in the second air passage. The connector is connected to the push block. A first step is provided in the second air passage. The connector has an abutment portion. The two ends of the elastic element act on the abutment portion and the first step, respectively.

3. The air-pump mechanism for assisting demolding according to claim 2, characterized in that, The connector is a threaded component, and the connector and the push block are connected by a threaded structure. The connector can change the distance between the abutment part and the push block by screwing the thread.

4. The air-pump mechanism for assisting demolding according to claim 2, characterized in that, The contact portion is positioned directly opposite the air outlet of the first air passage.

5. The air-pump mechanism for assisting demolding according to claim 2, characterized in that, The second airway is provided with a second step, and the contact part can move to contact the second step under the airflow pressure of the airway system.

6. The air-pump mechanism for assisting demolding according to claim 2, characterized in that, The elastic element is a spring and is sleeved on the connecting member.

7. The air ejector mechanism for assisting demolding according to claim 2, characterized in that, The outlet end of the second airway has a flared structure, and the portion of the pusher block located at the outlet end of the second airway is adapted to the shape of the outlet end of the second airway.

8. The air-pump mechanism for assisting demolding according to claim 2, characterized in that, A rotation-limiting structure is provided between the push block and the wall of the second air passage to restrict the push block from rotating relative to the second air passage.

9. The air-pump mechanism for assisting demolding according to claim 2, characterized in that, The mold base assembly includes a template, a mold core, and a sealing ring. The first air passage is located on the template, the cavity and the second air passage are located on the mold core, the template and the mold core are stacked, and the sealing ring is located between the template and the mold core and is arranged around the outer periphery of the joint between the first air passage and the second air passage.

10. An injection mold, characterized in that, Includes the air ejector mechanism for assisting demolding as described in any one of claims 1 to 9.

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