Demolding mechanism and injection mold

Abstract

The present application provides a demolding mechanism and an injection mold for demolding a workpiece. The workpiece has an inner wall, and a first wall and a second wall that are both convexly provided on the inner wall and are spaced apart in a first direction. The demolding mechanism includes an inclined ejector block, a straight ejector block, and a lifting member. The inclined ejector block and the straight ejector block cooperate to form the first wall, the inner wall, and the second wall of the workpiece; the inclined ejector block and the straight ejector block are slidably matched along a second direction; a slideway extending along the first direction is provided on the straight ejector block, and the lifting member is slidably matched with the slideway along the first direction; wherein, the first direction and the second direction form an angle; when the mold is opened, the inclined ejector block can move away from the inner wall along the second direction, and after the inclined ejector block is separated from the second wall, the inclined ejector block can drive the lifting member to move close to the first wall along the first direction, and cause the lifting member to lift the first wall, so that the workpiece is separated from the straight ejector block. The demolding mechanism is simple and reasonable, low in cost, and the workpiece can be demolded conveniently and reliably.

Description

Technical Field

[0001] The present invention relates to the field of mold manufacturing, and more particularly, to a demolding mechanism and an injection mold. Background Art

[0002] When processing workpieces using an injection mold, the workpiece contacts the molding part of the mold, and after injection molding, it is necessary to separate the workpiece from the mold. For example, when processing an intelligent security detection temperature measurement door foot cover, after molding with an injection mold, it is necessary to separate the intelligent security detection temperature measurement door foot cover from the mold to take out the processed product.

[0003] It has been found through research that the existing injection molds for processing intelligent security detection temperature measurement door foot covers have the following disadvantages:

[0004] It is inconvenient to separate the workpiece from the mold. Summary of the Invention

[0005] The purpose of the present invention is to provide a demolding mechanism and an injection mold, which can improve the convenience of separating the workpiece from the mold.

[0006] The embodiments of the present invention are implemented as follows:

[0007] In a first aspect, an embodiment of the present invention provides a demolding mechanism for demolding a workpiece. The workpiece has an inner wall, and a first wall and a second wall that are both convexly provided on the inner wall and are spaced apart in a first direction. The demolding mechanism includes:

[0008] An inclined ejector block, a straight ejector block, and a lifting member. The inclined ejector block and the straight ejector block cooperate to form the first wall, the inner wall, and the second wall of the workpiece; the inclined ejector block and the straight ejector block are slidably engaged along a second direction; a slideway extending in the first direction is provided on the straight ejector block, and the lifting member is slidably engaged with the slideway along the first direction; wherein, the first direction and the second direction form an angle;

[0009] When the mold is opened, the inclined ejector block can move away from the inner wall along the second direction, and after the inclined ejector block is separated from the second wall, the inclined ejector block can drive the lifting member to move closer to the first wall along the first direction, and cause the lifting member to lift the first wall, so that the workpiece is separated from the straight ejector block.

[0010] In an alternative embodiment, a first driving surface is provided on a side of the inclined ejector block away from the second wall, and a second driving surface is provided on a side of the lifting member close to the second wall. At least one of the first driving surface and the second driving surface is not perpendicular to the first direction, so that after the inclined ejector block moves away from the inner wall along the second direction and is separated from the second wall, the second driving surface abuts against the first driving surface to drive the lifting member to move closer to the first wall along the first direction.

[0011] In an alternative embodiment, both the first driving surface and the second driving surface are not perpendicular to the first direction.

[0012] In an optional embodiment, at least one of the first driving surface and the second driving surface has an angle with the first direction, and the angle is 30°-40°.

[0013] In an optional embodiment, a sliding groove is provided on a side of the inclined ejection block away from the second wall, and the ejection member is slidably matched with the sliding groove in the second direction.

[0014] In an optional embodiment, the demoulding mechanism further includes an elastic reset member, which is disposed on the straight ejector block and is used to cause the ejector member to generate a movement tendency in the first direction away from the first wall.

[0015] In an optional embodiment, a first limiting protrusion is provided on the outer peripheral surface of the lifting member, a second limiting protrusion is provided on the inner peripheral wall of the slideway, and the elastic return member is sleeved outside the lifting member and located between the first limiting protrusion and the second limiting protrusion.

[0016] In an optional embodiment, a third limiting protrusion is further provided on the straight top block, the first limiting protrusion is located between the second limiting protrusion and the third limiting protrusion, and the third limiting protrusion can abut against the second limiting protrusion to prevent the lifting member from detaching from the slide when it is away from the first wall.

[0017] In an optional embodiment, the demoulding mechanism also includes a push plate, a sliding sleeve and a guide oblique rod, the guide oblique rod has an angle with the first direction, the sliding sleeve is arranged outside the guide oblique rod and is used to be fixedly connected to the mold frame; the guide oblique rod is connected to the inclined lift block, and the guide oblique rod and the push plate slide in cooperation in the second direction; the push plate is used to drive the guide oblique rod to move along the first direction, and under the limitation of the sliding sleeve, the guide oblique rod moves away from the inner wall along the second direction, thereby separating the inclined lift block from the second wall.

[0018] In a second aspect, an embodiment of the present invention provides an injection mold, the injection mold comprising:

[0019] The demoulding mechanism of any of the preceding embodiments.

[0020] The beneficial effects of the embodiments of the present invention are:

[0021] In summary, this embodiment provides a demolding mechanism. After the workpiece is injection-molded, the mold is opened, and then the angled ejector block is driven to move away from the inner wall of the workpiece and separate from the second wall of the workpiece. When the angled ejector block separates from the second wall, the movement of the workpiece in the first direction is not restricted by the angled ejector block. At the same time, after the angled ejector block separates from the second wall, the angled ejector block continues to move away from the inner wall, contacts the lifting member, and drives the lifting member to approach the first wall in the first direction. When the lifting member contacts the first wall, under the lifting of the lifting member, the workpiece moves away from the straight ejector block in the first direction. Since the angled ejector block has separated from the second wall of the workpiece, the workpiece can smoothly move in the first direction under the lifting of the lifting member, thereby separating from the straight ejector block, loosening the contact position between the workpiece and the straight ejector block, and having a small contact area between the workpiece and the straight ejector block, making it convenient to remove the workpiece from the straight ejector block, and the operation is convenient and reliable.

[0022] This embodiment also provides an injection mold, including the above-mentioned demolding mechanism, which can improve the demolding convenience of processed workpieces such as intelligent security detection temperature measurement door foot covers. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0024] Figure 1 is a schematic structural diagram of the foot cover;

[0025] Figure 2 is a schematic structural diagram of the demolding mechanism of the embodiment of the present invention;

[0026] Figure 3 is a cross-sectional structural diagram of the demolding mechanism of the embodiment of the present invention;

[0027] Figure 4 is a cross-sectional schematic diagram of a part of the demolding mechanism of the embodiment of the present invention;

[0028] Figure 5 is Figure 4 a partial enlarged structural diagram of part A in

[0029] Figure 6 is a schematic diagram of a deformed structure of the demolding mechanism of the embodiment of the present invention.

[0030] ICON:

[0031] 10 - Foot cover; 11 - Inner wall; 12 - First wall; 13 - Second wall; 14 - First reverse buckle; 15 - Second reverse buckle; 001 - Demolding mechanism; 100 - Angled ejector block; 110 - Slide groove; 111 - First driving surface; 200 - Straight ejector block; 210 - Slideway; 211 - First hole section; 212 - Second hole section; 213 - Second limiting convex part; 220 - Connecting rod; 300 - Lifting piece; 310 - First limiting convex part; 320 - First end; 330 - Second end; 331 - Second driving surface; 400 - Push plate; 410 - Strip-shaped hole; 500 - Slide sleeve; 600 - Guide angled rod; 700 - Elastic reset piece; 800 - Pressing block; 810 - Fixing screw; 900 - Side core-pulling slider; 910 - Angled guide pillar; 920 - Wear-resistant block. Detailed implementation mode

[0032] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. The components of the embodiments of the present invention usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0034] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0035] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the workpiece of the invention is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0036] In addition, terms such as "horizontal" and "vertical" do not require the components to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0037] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "arranged", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0038] Please refer to Figures 1 - 6 , this embodiment provides a demolding mechanism 001 for improving the convenience of removing a processed workpiece from a mold. The demolding mechanism 001 can be used to demold an intelligent safety detection temperature measuring door foot cover. Obviously, the demolding mechanism 001 can also be used for demolding other workpieces. The structure of the demolding mechanism 001 is simple and reasonable, and the demolding during work is smooth and convenient, improving the operation efficiency.

[0039] Please refer to Figure 1 , in this embodiment, taking the workpiece to be demolded as an intelligent safety detection temperature measuring door foot cover (hereinafter referred to as foot cover 10) as an example for illustration, that is, the injection mold to which the demolding mechanism 001 is attached can be used for injecting the foot cover. The foot cover has an inner wall 11, and a first wall 12 and a second wall 13 that are both convexly provided on the inner wall 11 and are spaced apart in the first direction. A first undercut 14 is provided on one side of the first wall 12 close to the second wall 13; a second undercut 15 is also provided on the inner wall 11 of the foot cover. After injection molding, the first undercut 14 is demolded by an inclined lifter method, and the second undercut 15 is demolded by a side core-pulling slider method.

[0040] Please refer to Figures 2 - 5 , in this embodiment, the demolding mechanism 001 includes an inclined lifter block 100, a straight lifter block 200, and a lifting member 300. The inclined lifter block 100 and the straight lifter block 200 cooperate to form the first wall 12, the inner wall 11, and the second wall 13 of the workpiece; the inclined lifter block 100 and the straight lifter block 200 are slidably engaged along the second direction; a slideway 210 extending in the first direction is provided on the straight lifter block 200, and the lifting member 300 and the slideway 210 are slidably engaged along the first direction; wherein, the first direction and the second direction form an angle.

[0041] When the mold is opened, the lifter block 100 can move away from the inner wall 11 in the second direction. After the lifter block 100 is separated from the second wall 13, the lifter block 100 can drive the lifting member 300 to move closer to the first wall 12 in the first direction, and cause the lifting member 300 to lift the first wall 12 in the first direction, so that the foot sleeve 10 is separated from the direct lifter block 200.

[0042] For the demolding mechanism 001 provided in this embodiment, after the workpiece is injection molded, the mold is opened. During the mold opening process, the lifter block 100 is driven, so that the lifter block 100 moves away from the inner wall 11 of the workpiece and separates the lifter block 100 from the second wall 13 of the workpiece and the first undercut 14 on the second wall 13. After the lifter block 100 is separated from the second wall 13, the movement of the workpiece in the first direction is not restricted by the lifter block 100. At the same time, after the lifter block 100 is separated from the second wall 13, the lifter block 100 continues to move away from the inner wall 11. The lifter block 100 can contact the lifting member 300 and drive the lifting member 300 to move closer to the first wall 12 in the first direction. When the lifting member 300 contacts the first wall 12, under the lifting of the lifting member 300, the workpiece moves away from the direct lifter block 200 in the first direction. Since the lifter block 100 has been separated from the second wall 13 of the workpiece, the workpiece can move smoothly in the first direction under the lifting of the lifting member 300, so that the first wall 12 of the workpiece is separated from the direct lifter block 200, and the position where the inner wall 11 of the workpiece contacts the direct lifter block 200 is separated, and the contact position between the workpiece and the direct lifter block 200 is loosened. The contact area between the workpiece and the direct lifter block 200 is small, so that it is convenient to remove the workpiece from the direct lifter block 200, and the demolding operation is convenient and reliable.

[0043] Please refer to Figure 5 , the arrow pointing to the right in the figure indicates that the lifter block 100 can move to the right after the mold is opened, so that after moving a set distance, it abuts against the lifting member 300 and drives the lifting member 300 to move. Among them, the set distance refers to the stroke required for the lifter block 100 to disengage from the first undercut 14 of the foot sleeve. In this embodiment, optionally, a chute 110 is provided on the side surface of the lifter block 100 for contacting the direct lifter block 200. The chute 110 extends in the second direction. A first groove wall is provided on one side of the chute 110 in its extending direction, and on the other side in its extending direction, it extends to the side surface of the lifter block 100, that is, the chute 110 is a through groove with one side open. The chute 110 also has two second groove walls that are connected to and opposite to the first groove wall. The bottom wall of the chute 110 is perpendicular to the first direction.

[0044] Furthermore, the first groove wall of the chute 110 and the bottom wall have an included angle, and this included angle is an obtuse angle. In other words, the first groove wall and the first direction have an included angle, and this included angle is an acute angle, and the range of the included angle is 30° - 40°. For example, the included angle between the first groove wall and the first direction is 30°, 35° or 40°, etc.

[0045] For ease of description, the first groove wall may also be referred to as the first driving surface 111.

[0046] Please refer to Figure 2 or Figure 3 , optionally, the demolding mechanism 001 further includes a push plate 400, a sliding sleeve 500, and a guiding inclined rod 600. The guiding inclined rod 600 forms an angle with the first direction. The sliding sleeve 500 is sleeved outside the guiding inclined rod 600 and is used for fixedly connecting with the mold base; the guiding inclined rod 600 is connected to the lifter block 100. A strip-shaped hole 410 extending in the second direction is provided on the push plate 400. The guiding inclined rod 600 is inserted into the strip-shaped hole 410 and is in sliding fit with the push plate 400 in the second direction; the push plate 400 is used to drive the guiding inclined rod 600 to move in the first direction, and under the limitation of the sliding sleeve 500, the guiding inclined rod 600 slides relative to the push plate 400 in the strip-shaped hole 410 to move away from the inner wall 11 in the second direction, thereby driving the lifter block to move together and separating the lifter block 100 from the second wall 13.

[0047] It should be noted that the lifter block 100 can be driven by one guiding inclined rod 600 or multiple guiding inclined rods 600, and they are not listed one by one in this embodiment.

[0048] In addition, the straight lifter block 200 and the push plate 400 are connected by a connecting rod 220.

[0049] In this embodiment, optionally, a through hole is provided on the straight lifter block 200, and the through hole is the sliding groove 210. The through hole can be a cylindrical hole, which is convenient for the installation of the lifting member 300.

[0050] Optionally, the sliding groove 210 includes a first hole section 211 and a second hole section 212. The first hole section 211 is communicated with the second hole section 212. The first hole section 211 and the second hole section 212 are coaxial, and the aperture of the first hole section 211 is smaller than that of the second hole section 212 to form an annular stepped surface at the connection position of the first hole section 211 and the second hole section 212. The annular stepped surface is the second limiting convex part 213. The second hole section 212 is arranged close to the lifter block 100.

[0051] Please refer to Figure 5 , optionally, the demolding mechanism 001 further includes a pressing block 800 and a fixing screw 810. The pressing block 800 is connected to the straight lifter block 200 by the fixing screw 810. The pressing block 800 is used to cover the port of the second hole section 212, and a through hole for the lifting member 300 to extend out is provided on the pressing block 800. The end wall of the pressing block 800 facing the second hole section 212 forms a third limiting part.

[0052] It should be understood that the pressing block 800 and the straight lifter block 200 can also be fixedly connected in other ways.

[0053] In this embodiment, optionally, the lifting member 300 is rod-shaped. The lifting member 300 can be a cylindrical rod, which is convenient for being inserted into the slideway 210 of the direct lifting block 200. And the lifting member 300 and the slideway 210 are in clearance fit, so that the lifting member 300 is convenient to slide relative to the slideway 210 in the first direction.

[0054] Furthermore, a first limiting convex portion 310 is provided on the outer peripheral surface of the lifting member 300. The first limiting convex portion 310 is an annular structure and is arranged around the axis of the lifting member 300.

[0055] Furthermore, the lifting member 300 has a first end 320 for abutting against the first wall 12 of the workpiece and a second end 330 for abutting against the inclined lifting block 100. At least part of the end surface of the second end 330 is an inclined surface, which can also be called a second driving surface 331. The second driving surface 331 has an included angle with the first direction, and this included angle is 30°-40°. For example, the included angle between the second driving surface 331 and the first direction is 30°, 35° or 40°, etc.

[0056] Optionally, the demolding mechanism 001 further includes an elastic reset member 700. The elastic reset member 700 is arranged on the direct lifting block 200 and is used to make the lifting member 300 have a movement tendency to move away from the first wall 12 in the first direction.

[0057] Furthermore, the elastic reset member 700 can be but is not limited to a spring. The elastic reset member 700 is sleeved outside the lifting member 300 and is clamped between the first limiting convex portion 310 and the second limiting convex portion 213. At the same time, the first limiting convex portion 310 is located between the second limiting convex portion 213 and the third limiting convex portion on the pressing block 800. The first limiting convex portion 310 abuts against the third limiting convex portion under the action of the elastic reset member 700 to prevent the lifting member 300 from disengaging from the slideway 210.

[0058] The demoulding mechanism 001 provided in this embodiment first sets the elastic reset member 700 outside the lifting member 300 from the first end 320 of the lifting member 300, and then passes the first end 320 of the lifting member 300 through the second hole section 212 and enters the first hole section 211. Then, the second end 330 of the lifting member 300 passes through the pressing block 800, and then the pressing block 800 is fixed on the straight lifting block 200, so as to complete the assembly of the lifting member 300, the elastic reset member 700 and the straight lifting block 200. After the assembly is completed, the second section of the lifting member 300 extends out of the pressing block 800 and abuts against the bottom wall of the groove on the inclined lifting block 100. The lifting member 300 is clamped between the two second groove walls, and the lifting member 300 is not only limited by the first hole section 211, but also by the slide groove 110, so that the position of the lifting member 300 is accurate and reliable. During the process of opening the mold after the injection molding of the workpiece, the inclined ejector block 100 moves away from the inner wall 11 of the workpiece along the second direction, and the first driving surface 111 can abut against the second driving surface 331 when the inclined ejector block 100 is separated from the first undercut 14, thereby smoothly driving the lifting member 300 to approach the first wall 12 of the workpiece and lift the workpiece away from the straight ejector block 200. At the same time, due to the action of the elastic reset member 700, when the lifting member 300 rises, the elastic reset member 700 is compressed, and the lifting member 300 has a tendency to move in a direction opposite to the first direction. When the inclined ejector block 100 is reset in a direction opposite to the second direction, the lifting member 300 loses the abutment of the inclined ejector block 100, and is reset under the action of the elastic reset member 700, which is convenient for the next demolding.

[0059] It should be noted that in order to reduce burrs on the workpiece, when the lifting member 300, the elastic return member 700, the straight ejector block 200 and the inclined ejector block 100 are assembled and the mold is closed, the first end 320 of the lifting member 300 is flush with the end surface of the straight ejector block 200, so that the molten material will not enter the slide 210, thereby reducing burrs on the workpiece.

[0060] At the same time, in order to avoid the second driving surface 331 on the lifting member 300 and the first driving surface 111 on the slide groove 110 being staggered after multiple opening and closing of the mold, and the two cannot resist each other, the through hole on the pressing block 800 can be set to a non-circular hole, and the cross-section of the rod section of the lifting member 300 located between the first limiting protrusion 310 and the second end 330 is non-circular. After the lifting member 300 is inserted into the through hole of the pressing block 800, the two are relatively fixed in the circumferential direction of the lifting member 300, that is, the lifting member 300 will not rotate relative to the pressing block 800, and the position of the second driving surface 331 on the lifting member 300 and the first driving surface 111 on the slide groove 110 is more accurate.

[0061] It should be noted that, by providing the pressing block 800 , it is convenient to install the lifting member 300 and the straight lifting block 200 , and it is convenient to replace the lifting member 300 .

[0062] It should be noted that it is sufficient to set one of the first driving surface 111 and the second driving surface 331 as an inclined surface having an angle with the first direction, and the lifter 300 can also be lifted under the abutment of the first driving surface 111.

[0063] Please refer to Figure 6 , where the arrow pointing to the left indicates the movement direction of the side core-pulling slider 900 during the mold opening process. In this embodiment, optionally, the demolding mechanism 001 further includes a side core-pulling slider 900 and an inclined guide pillar 910. The inclined guide pillar 910 is connected to the template and has an angle with the first direction. The side core-pulling slider 900 is slidably engaged with the straight ejector block 200 along the second direction. During the mold opening process, under the guidance of the inclined guide pillar 910, the side core-pulling slider 900 moves away from the inner wall 11 of the workpiece along the second direction.

[0064] Optionally, wear-resistant blocks 920 are provided at the contact positions between the side core-pulling slider 900 and the template, thereby reducing the wear of the side core-pulling slider 900.

[0065] In other words, in order to facilitate the demolding of the workpiece, the side core-pulling slider 900 and the inclined guide pillar 910 are provided to smoothly demold the second undercut 15 of the workpiece.

[0066] During the processing of the workpiece, the side core-pulling slider 900, the straight ejector block 200, and the inclined ejector block 100 cooperate together to form the inner wall 11, the second wall 13, the first wall 12, the first undercut 14, and the second undercut 15 of the workpiece. After the workpiece is formed, a mold opening operation is performed. During the mold opening process, the side core-pulling slider 900 moves away from the workpiece along the second direction under the action of the inclined guide pillar 910, so that the side core-pulling slider 900 is disengaged from the second undercut 15. Then, the injection molding machine drives the push plate 400. Driven by the connecting rod 220, the straight ejector block 200 moves upward along the first direction and drives the workpiece to rise together. And under the cooperation of the guiding inclined rod 600 and the sliding sleeve 500, the guiding inclined rod 600 drives the inclined ejector block 100 to rise so that the inclined ejector block 100 moves away from the inner wall 11 of the workpiece along the second direction. When the inclined ejector block 100 is disengaged from the second wall 13 and the first undercut 14, the inclined ejector block 100 continues to move away from the inner wall 11 of the workpiece, and the first driving surface 111 can abut against the second driving surface 331, thereby driving the lifter 300 to lift the workpiece and separating the workpiece from the straight ejector block 200. Finally, the workpiece can be taken off the straight ejector block 200 by using a manipulator.

[0067] The demolding mechanism 001 provided in this embodiment has a simple and reasonable structure, is convenient for manufacturing and processing, has a low cost, and is convenient, reliable for demolding.

[0068] This embodiment also provides an injection mold, which can be used for injection molding of a foot sleeve and can improve the demolding convenience of the processed intelligent safety detection temperature measuring door foot sleeve.

[0069] It should be noted that the injection mold can form multiple workpieces simultaneously. Correspondingly, each workpiece can be demolded through a demolding mechanism 001.

[0070] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, various modifications and changes can be made to the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A demolding mechanism for demolding a workpiece, the workpiece having an inner wall, and a first wall and a second wall both protruding from the inner wall and arranged at intervals in a first direction, characterized in that, The demolding mechanism includes: An inclined ejector block, a straight ejector block, and a lifting member. The inclined ejector block and the straight ejector block cooperate to form the first wall, the inner wall, and the second wall of the workpiece. The inclined ejector block and the straight ejector block are slidably engaged in the second direction. The straight ejector block is provided with a slideway extending in the first direction, and the lifting member is slidably engaged with the slideway in the first direction. Wherein, the first direction and the second direction form an angle. When the mold is opened, the inclined ejector block can move away from the inner wall in the second direction. After the inclined ejector block is separated from the second wall, the inclined ejector block can drive the lifting member to approach the first wall in the first direction and cause the lifting member to lift the first wall so that the workpiece is separated from the straight ejector block. The demolding mechanism further includes a push plate, a sliding sleeve, and a guiding inclined rod. The guiding inclined rod forms an angle with the first direction. The sliding sleeve is sleeved outside the guiding inclined rod and is used for fixedly connecting with the mold base. The guiding inclined rod is connected to the inclined ejector block. The push plate is provided with a strip-shaped hole extending in the second direction. The guiding inclined rod is inserted into the strip-shaped hole and is slidably engaged with the push plate in the second direction. The push plate is used to drive the guiding inclined rod to move in the first direction. Under the limitation of the sliding sleeve, the guiding inclined rod slides relative to the push plate in the strip-shaped hole to move away from the inner wall in the second direction, thereby driving the inclined ejector block to move together and separating the inclined ejector block from the second wall. The push plate and the straight ejector block are connected by a connecting rod. A chute is provided on the side surface of the inclined ejector block for contacting the straight ejector block. The chute extends in the second direction, and a first driving surface is provided on one side of the chute in its extending direction. The lifting member has a first end for abutting against the first wall of the workpiece and a second end for abutting against the inclined ejector block. At least part of the end surface of the second end is a second driving surface, and the second driving surface is an inclined surface. The injection molding machine drives the push plate. Driven by the connecting rod, the straight ejector block moves upward in the first direction and drives the workpiece to rise together. Under the cooperation of the guiding inclined rod and the sliding sleeve, the guiding inclined rod drives the inclined ejector block to rise so that the inclined ejector block moves away from the inner wall of the workpiece in the second direction. When the inclined ejector block is separated from the second wall and the first undercut, the inclined ejector block continues to move away from the inner wall of the workpiece. The first driving surface can abut against the second driving surface, thereby driving the lifting member to lift the workpiece and separating the workpiece from the straight ejector block.

2. The demolding mechanism according to claim 1, wherein: Both the first driving surface and the second driving surface are not perpendicular to the first direction.

3. The demolding mechanism according to claim 1, wherein: At least one of the first driving surface and the second driving surface forms an angle with the first direction, and the angle is 30° - 40°.

4. The demolding mechanism according to claim 1, wherein: The demolding mechanism further includes an elastic reset member. The elastic reset member is arranged on the straight ejector block and is used to cause the lifting member to have a movement tendency to move away from the first wall in the first direction.

5. The demolding mechanism according to claim 4, wherein: The outer peripheral surface of the lifting member is provided with a first limiting protrusion, the inner peripheral wall of the slideway is provided with a second limiting protrusion, and the elastic return member is sleeved outside the lifting member and located between the first limiting protrusion and the second limiting protrusion.

6. The demoulding mechanism according to claim 5, characterized in that: The straight top block is also provided with a third limiting protrusion, the first limiting protrusion is located between the second limiting protrusion and the third limiting protrusion, and the third limiting protrusion can abut against the second limiting protrusion to prevent the lifting member from detaching from the slideway when it is away from the first wall.

7. An injection mold, characterized in that, The injection mold comprises: The demoulding mechanism according to any one of claims 1 to 6.

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