Automatic demolding mechanism

Abstract

The invention discloses an automatic demolding mechanism which comprises a base, a first mold, a second mold and a third mold, and the base is arranged on a mold and can selectively move in the first direction; the sliding block body is connected with the base and extends in the second direction, the second direction is orthogonal to the first direction, and the outer surface of the sliding block body is coated with an injection molding part; the guide plate is arranged on the mold, and a first guide part is formed on the guide plate; the scraping plate is arranged on the sliding block body in a sleeving manner, and a second guide part matched with the first guide part is formed on the scraping plate; and the first guide part is matched with the second guide part so as to be suitable for moving in the second direction when the scraper moves along with the sliding block body. According to the automatic demolding mechanism, long-distance core pulling can be avoided, and the mold cost and the machining difficulty are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of injection molding machines, and in particular to an automatic demolding mechanism. BACKGROUND

[0002] In the related art, the demolding mechanism of a circular deep cavity product is usually driven by an oil cylinder to drive a sliding block core-pulling mechanism. However, this driving method has the following technical problems: the core-pulling distance is related to the length of the product, the longer the product, the longer the core-pulling distance, and the corresponding guide rail will also be longer, and the processing difficulty of the excessively long guide rail is great; on the other hand, the cost of oil cylinder driving is high. Moreover, the mold opening and closing action is extremely complex, and the operator of the injection molding machine is required to be high. In actual operation, the sequence of the mold opening and closing action is often wrong due to insufficient experience and improper operation of the operator, which further causes the mold to be damaged, and in severe cases, the mold is even scrapped, which brings many adverse effects to the production. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present application is to provide an automatic demolding mechanism which can avoid long-distance core-pulling and reduce the cost and processing difficulty of the mold.

[0004] According to the automatic demolding mechanism of the present application, the automatic demolding mechanism comprises a base, the base is arranged in a mold and can be selectively moved in a first direction; a sliding block body, the sliding block body is connected with the base and extends in a second direction, the second direction is orthogonal to the first direction, and the outer surface of the sliding block body is covered with an injection molding part; a guide plate, the guide plate is arranged in the mold, and the guide plate is formed with a first guide part; a scraper, the scraper is sleeved on the sliding block body, and the scraper is formed with a second guide part matched with the first guide part; wherein the first guide part and the second guide part are matched to be suitable for moving in the second direction when the scraper moves with the sliding block body.

[0005] According to the automatic demolding mechanism of the present application, the automatic demolding mechanism has a base, a sliding block body, a guide plate and a scraper, the base is selectively moved in a first direction, the sliding block body is connected with the base and the outer surface is covered with an injection molding part, the guide plate is fixedly connected with the mold and is formed with a first guide part, the scraper is sleeved on the sliding block body and is formed with a second guide part matched with the first guide part, the first guide part and the second guide part are matched to be suitable for moving in the second direction when the scraper moves with the sliding block body, and the scraper can separate the injection molding part from the sliding block body during movement, thereby avoiding long-distance core-pulling and reducing the cost and processing difficulty of the mold.

[0006] In some embodiments of this application, the first guide portion is configured as one of a guide groove and a guide post, and the second guide portion is configured as the other of the guide groove and the guide post, wherein the guide post can be selectively slidable within the guide groove.

[0007] In some embodiments of this application, the guide groove includes a first groove, a second groove, and a third groove that are connected in sequence. The first groove and the third groove extend along the first direction, and the second groove extends obliquely along the first direction toward a direction away from the base.

[0008] In some embodiments of this application, the angle between the extension direction of the second groove and the first direction is α and satisfies: 50°≤α≤60°.

[0009] In some embodiments of this application, the number of guide plates is two, the guide plates are spaced apart along a third direction, the two guide plates have a first guide portion formed on one side facing each other, the scraper is located between the two guide plates, and the scraper has a second guide portion formed on both sides along the third direction; wherein, the first direction, the second direction and the third direction are orthogonal to each other.

[0010] In some embodiments of this application, the scraper is formed with a first through hole that extends along the second direction, and the slider body passes through the first through hole. The inner diameter of the first through hole is smaller than the maximum outer diameter of the injection molded part.

[0011] In some embodiments of this application, the scraper is further formed with a second through hole that extends through the second direction, and the automatic demolding mechanism further includes a guide rod, which is connected to the base and extends along the second direction, and passes through the second through hole and fits against the inner wall of the second through hole.

[0012] In some embodiments of this application, there are multiple guide rods, which are spaced apart along a third direction. There are also multiple second through holes, which correspond one-to-one with each of the guide rods.

[0013] In some embodiments of this application, the base has a first mounting hole and a second mounting hole extending inward on the side facing the scraper, a portion of the slider body is mounted in the first mounting hole, and a portion of the guide rod is mounted in the second mounting hole.

[0014] In some embodiments of this application, the automatic demolding mechanism further includes: a push rod disposed on the mold and connected to the base, the push rod being adapted to drive the base to move along the first direction.

[0015] Additional aspects and advantages of this application 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 this application. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a partially exploded schematic diagram of the automatic demolding mechanism according to an embodiment of this application; Figure 2 This is a cross-sectional schematic diagram of the automatic demolding mechanism according to an embodiment of this application; Figure 3 yes Figure 2 A cross-sectional schematic diagram of the automatic demolding mechanism after it has moved to a certain position; Figure 4 yes Figure 2 A cross-sectional schematic diagram of the automatic demolding mechanism in the demolding state.

[0017] Figure label: 10. Automatic demolding mechanism; 11. Base; 111. First mounting hole; 112. Second mounting hole; 12. Slider body; 13. Guide plate; 131. Guide groove; 1311. First groove; 1312. Second groove; 1313. Third groove; 14. Scraper; 141. Guide post; 142. First through hole; 143. Second through hole; 15. Mold; 16. Guide rod; 17. Ejector rod; 20. Injection molded part. Detailed Implementation

[0018] The embodiments of this application 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 application, and should not be construed as limiting this application.

[0019] The following is for reference. Figures 1-4 The automatic demolding mechanism 10 according to an embodiment of the present application is described. The automatic demolding mechanism 10 includes a base 11, a slider body 12, a guide plate 13, and a scraper 14.

[0020] A base 11 is disposed on a mold 15 and is selectively movable along a first direction. A slider body 12 is connected to the base 11 and extends along a second direction, which is orthogonal to the first direction. The outer surface of the slider body 12 is covered with an injection molded part 20. A guide plate 13 is disposed on the mold 15 and has a first guide portion. A scraper 14 is sleeved on the slider body 12 and has a second guide portion that cooperates with the first guide portion. The first guide portion and the second guide portion cooperate to adapt to the scraper 14 moving along the second direction as it moves with the slider body 12.

[0021] Currently, the demolding mechanism for circular deep-cavity products mostly uses a hydraulic cylinder-driven slider core-pulling mechanism. However, this driving method has the following technical problems: the core-pulling distance is related to the product length; the longer the product, the longer the core-pulling distance, and the corresponding guide rail also becomes longer, which makes the machining of excessively long guide rails difficult. Furthermore, hydraulic cylinder drives are expensive. Moreover, the mold opening and closing actions are extremely complex, requiring highly skilled injection molding machine operators. In actual operation, insufficient operator experience and improper operation often lead to errors in the sequence of mold opening and closing actions, resulting in damage to the mold 15, and in severe cases, even rendering the mold 15 unusable, causing numerous adverse effects on production.

[0022] In response, this application proposes an automatic demolding mechanism 10, which can avoid long-distance core pulling and reduce the cost and processing difficulty of the mold 15.

[0023] Specifically, the automatic demolding mechanism 10 may include a base 11, a slider body 12, a guide plate 13, and a scraper 14. The base 11 may be mounted on the mold 15, and the base 11 may selectively move along a first direction (the X direction shown in Figure 1). Optionally, the base 11 may be driven to move along the first direction by a drive mechanism. The slider body 12 may be connected to the base 11. In some embodiments, the slider body 12 and the base 11 may be detachably connected by screws or bolts, or by snap-fit ​​or plug-in connection. In a specific embodiment, the slider body 12 may form a self-locking structure with the base 11 through a wedge groove. The slider body 12 may move along a second direction (e.g., ... Figure 1 The second direction (as shown in the Y direction) extends, and the second direction can be orthogonal to the first direction. The outer surface of the slider body 12 can be covered with an injection molded part 20. It is understood that the injection molded part 20 can cover the outer surface of the slider body 12. In some embodiments, the base 11 can serve as a core support, and the material is selected as S55C, with quenching and tempering treatment of HB280-320, thereby improving the structural strength of the base 11.

[0024] A guide plate 13 can be disposed at the mold 15, and a first guide portion can be formed on the guide plate 13. Optionally, the guide plate 13 and the mold 15 can be detachably connected by screws or bolts, or the guide plate 13 and the mold 15 can be detachably connected by snap-fit ​​or plug-in. The thickness of the guide plate 13 can be 25mm. A scraper 14 can be sleeved on the slider body 12, and the scraper 14 can be formed with a second guide portion. The second guide portion can cooperate with the first guide portion. The cooperation of the first guide portion and the second guide portion is adapted to allow the scraper 14 to move along a second direction when it moves with the slider body 12. It can be understood that by cooperating the first guide portion and the second guide portion, the scraper 14 can move along the second direction when it moves with the slider body 12. In actual operation, when the base 11 moves in the first direction away from the mold 15, the slider body 12 can move synchronously with the base 11, and the scraper 14 can move along the first direction with the base 11. By cooperating the first guide portion and the second guide portion, the scraper can achieve... Scraper 14 moves relative to slider body 12 along the second direction. Since the injection molded part 20 covers the outer surface of slider body 12, scraper 14 can separate injection molded part 20 from slider body 12 during movement. Specifically, scraper 14 can create a separation gap of 0.5-0.7mm between injection molded part 20 and slider body 12 along the draft angle during movement, allowing injection molded part 20 to fall freely under gravity. This method does not require setting the opening and closing sequence of mold 15. The injection molding machine operator only needs to set it according to the ordinary mold 15 setting method. It solves the problems of long slider core pulling distance, high hydraulic cylinder drive cost, difficult processing and assembly, reduces the production and processing cost of core pulling mechanism and shortens the production cycle.

[0025] In short, the automatic demolding mechanism 10 of this application embodiment has a base 11, a slider body 12, a guide plate 13, and a scraper 14. The base 11 can selectively move along a first direction. The slider body 12 is connected to the base 11 and its outer surface is covered with an injection molded part 20. The guide plate 13 is fixedly connected to the mold 15 and has a first guide portion. The scraper 14 is sleeved on the slider body 12 and has a second guide portion that cooperates with the first guide portion. The first guide portion and the second guide portion cooperate to be suitable for the scraper 14 to move along the second direction when it moves with the slider body 12. During the movement, the scraper 14 can separate the injection molded part 20 from the slider body 12, thereby avoiding long-distance core pulling and reducing the cost and processing difficulty of the mold 15.

[0026] In some embodiments of this application, the first guide portion may be configured as one of the guide groove 131 and the guide post 141, and the second guide portion may be configured as the other of the guide groove 131 and the guide post 141. The guide post 141 may optionally slide within the guide groove 131. In a specific embodiment, the first guide portion may be configured as the guide groove 131, and the second guide portion may be configured as the guide post 141. By sliding the guide post 141 along the guide groove 131, the scraper 14 can move relative to the slider body 12 in a second direction.

[0027] like Figures 2-4 As shown, in some embodiments of this application, the guide groove 131 may include a first groove 1311, a second groove 1312, and a third groove 1313, which are connected in sequence. The first groove 1311 and the third groove 1312 can extend along a first direction, and the second groove 1312 can extend obliquely away from the base 11 along the first direction. When the guide post 141 slides along the second groove 1312, the scraper 14 can move relative to the slider body 12 in a second direction. When the guide post 141 slides along the first groove 1311 and the third groove 1313, the scraper 14 is stationary relative to the slider body 12. By providing the second groove 1312, the scraper 14 can move relative to the slider body 12 in a second direction, that is, the injection molded part 20 can be separated from the slider body 12.

[0028] In some embodiments of this application, the angle between the extension direction of the second groove 1312 and the first direction is α, satisfying the relationship: 50°≤α≤60°. That is, the angle between the extension direction of the second groove 1312 and the first direction can be any value between 50° and 60°. For example, the angle between the extension direction of the second groove 1312 and the first direction can be, but is not limited to, 50°, 53°, 55°, 57°, 60°, etc. If the angle between the extension direction of the second groove 1312 and the first direction is too small, the separation gap between the injection molded part 20 and the slider body 12 will be too small and they will not be able to separate. If the angle between the extension direction of the second groove 1312 and the first direction is too large, the scraper 14 will detach from the slider body 12 during the movement, affecting the subsequent process. Therefore, by setting the angle between the extension direction of the second groove 1312 and the first direction within the above range, the movement of the scraper 14 relative to the slider body 12 along the second direction can be made more reliable, and the separation of the injection molded part 20 and the slider body 12 can be achieved.

[0029] like Figure 1 As shown, in some embodiments of this application, the number of guide plates 13 can be two, and the two guide plates 13 can be along a third direction (e.g., Figure 1The Z-direction shown is spaced apart, wherein the first direction, the second direction, and the third direction are orthogonal to each other. The two guide plates 13 can form a first guide portion on one side facing each other. The scraper 14 can be located between the two guide plates 13, and the scraper 14 can form a second guide portion on both sides along the third direction. By setting the scraper 14 between the two guide plates 13 and using two second guide portions in cooperation with two first guide portions, the scraper 14 can be subjected to more uniform force, which helps to drive the scraper 14 to move relative to the slider body 12 along the second direction, making the scraper 14 more stable during the movement, and ensuring that the scraper 14 can detach the injection molded part 20 from the slider body 12 during the movement.

[0030] like Figure 1 As shown, in some embodiments of this application, the scraper 14 is formed with a first through hole 142, which can be disposed through along the second direction. The slider body 12 can be disposed inside the first through hole 142, and the inner diameter of the first through hole 142 is smaller than the maximum outer diameter of the injection molded part 20. This ensures that the scraper 14 can contact the injection molded part 20 during movement, and ensures that the scraper 14 can create a separation gap of 0.5-0.7mm between the injection molded part 20 and the slider body 12 along the demolding draft angle during movement, so that the injection molded part 20 can fall off freely under the action of gravity.

[0031] like Figure 1 As shown, in some embodiments of this application, the scraper 14 may also have a second through hole 143, which can be disposed through the second direction. The automatic demolding mechanism 10 may also include a guide rod 16, which can be connected to the base 11 and can extend along the second direction. The guide rod 16 can pass through the second through hole 143 and can fit against the inner wall of the second through hole 143. The guide rod 16 can guide the movement of the scraper 14. Since the guide rod 16 can extend along the second direction, it ensures that the scraper 14 can also move along the second direction during the movement, ensuring that the scraper 14 moves relative to the slider body 12 along the second direction, thereby realizing the separation of the injection molded part 20 from the slider body 12. In some embodiments, the surface of the guide rod 16 can be plated with hard chrome, and the fit clearance between the guide rod 16 and the second through hole 143 is less than or equal to 0.015 mm.

[0032] like Figure 1 As shown, in some embodiments of this application, the number of guide rods 16 can be multiple, and the multiple guide rods 16 can be spaced apart along a third direction. The number of second through holes 143 can be multiple, and the multiple second through holes 143 can be arranged one-to-one with the multiple guide rods 16. By providing multiple second through holes 143 and multiple guide rods 16, the scraper 14 can move more smoothly during the movement, ensuring that the scraper 14 can disengage the injection molded part 20 from the slider body 12 during the movement.

[0033] like Figure 1 As shown, in some embodiments of this application, the base 11 has a first mounting hole 111 and a second mounting hole 112 on the side facing the scraper 14. The first mounting hole 111 and the second mounting hole 112 can extend toward the interior of the base 11. A portion of the slider body 12 can be installed in the first mounting hole 111, and a portion of the guide rod 16 can be installed in the second mounting hole 112. The first mounting hole 111 and the second mounting hole 112 can fix the slider body 12 and the guide rod 16, ensuring that the slider body 12 and the guide rod 16 can be fixedly connected to the base 11 respectively, so that when the base 11 moves along the first direction, it can drive the slider body 12 and the guide rod 16 to move synchronously.

[0034] like Figures 2-4 As shown, in some embodiments of this application, the automatic demolding mechanism 10 may further include an ejector rod 17, which may be disposed on the mold 15 and connected to the base 11. The ejector rod 17 may be used to drive the base 11 to move in a first direction. Further, the ejector rod 17 may include a push rod and an ejector plate. The ejector plate may be fixed on the base 11, and the push rod may be disposed on the mold 15. The push rod and the ejector plate may be floatingly connected, and the gap between the push rod and the ejector plate may be between 0.03 mm and 0.05 mm.

[0035] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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 this application.

[0036] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0037] In the description of this application, "multiple" means two or more.

[0038] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them.

[0039] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0040] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0041] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An automatic demolding mechanism, characterized in that, include: A base, which is disposed on the mold and can be selectively moved along a first direction; A slider body, which is connected to the base and extends along a second direction, the second direction being orthogonal to the first direction, and the outer surface of the slider body is covered with an injection molded part; A guide plate is disposed on the mold, and the guide plate has a first guide portion; A scraper, which is sleeved on the slider body and has a second guide portion that cooperates with the first guide portion; The first guide portion cooperates with the second guide portion to be adapted to move along a second direction when the scraper moves with the slider body.

2. The automatic demolding mechanism according to claim 1, characterized in that, The first guide portion is constructed as one of a guide groove and a guide post, and the second guide portion is constructed as the other of the guide groove and the guide post, wherein the guide post can be selectively slidable within the guide groove.

3. The automatic demolding mechanism according to claim 2, characterized in that, The guide groove includes a first groove, a second groove, and a third groove connected in sequence. The first groove and the third groove extend along the first direction, and the second groove extends obliquely away from the base along the first direction.

4. The automatic demolding mechanism according to claim 3, characterized in that, The angle between the extension direction of the second groove and the first direction is α and satisfies: 50°≤α≤60°.

5. The automatic demolding mechanism according to any one of claims 1-4, characterized in that, The number of guide plates is two, and the guide plates are spaced apart along a third direction. The first guide portion is formed on one side of the two guide plates facing each other. The scraper is located between the two guide plates, and the scraper has a second guide portion formed on both sides along the third direction. The first direction, the second direction, and the third direction are all orthogonal to each other.

6. The automatic demolding mechanism according to claim 5, characterized in that, The scraper has a first through hole extending along the second direction, and the slider body passes through the first through hole. The inner diameter of the first through hole is smaller than the maximum outer diameter of the injection molded part.

7. The automatic demolding mechanism according to claim 6, characterized in that, The scraper also has a second through hole extending along the second direction, and the automatic demolding mechanism further includes: A guide rod is connected to the base and extends along the second direction. The guide rod passes through the second through hole and fits against the inner wall of the second through hole.

8. The automatic demolding mechanism according to claim 7, characterized in that, The number of guide rods is multiple, and the multiple guide rods are spaced apart along a third direction. The number of second through holes is multiple, and the multiple second through holes are arranged in a one-to-one correspondence with the multiple guide rods.

9. The automatic demolding mechanism according to claim 8, characterized in that, The base has a first mounting hole and a second mounting hole extending inward on the side facing the scraper. A portion of the slider body is mounted in the first mounting hole, and a portion of the guide rod is mounted in the second mounting hole.

10. The automatic demolding mechanism according to claim 1, characterized in that, Also includes: A push rod is disposed in the mold and connected to the base, and the push rod is adapted to drive the base to move along the first direction.

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