Injection mold stripping mechanism and injection mold

Abstract

The application provides an injection mold stripping mechanism and an injection mold, and relates to the field of mold design. The injection mold stripping mechanism comprises a shovel base, a yielding slider, an inclined ejector block and an ejector pin assembly. The yielding slider and the shovel base are slidably connected in a first direction. The yielding slider and the inclined ejector block are slidably connected in a second direction. The inclined ejector block is connected with the ejector pin assembly. The yielding slider has a first position and a second position which are switched with each other. When the yielding slider is in the first position, the yielding slider and the inclined ejector block have a spacing on the surface of a molding cavity for forming a molding inner recess, so that the yielding slider and the inclined ejector block can move together in a stripping direction under the action of the ejector pin assembly. When the yielding slider is in the second position, the yielding slider and the inclined ejector block jointly cooperate to participate in forming the molding cavity of the molding inner recess. The stripping is convenient, and the plastic part is not easy to be damaged.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of mold design, in particular to an injection mold stripping mechanism and an injection mold. BACKGROUND

[0002] In the field of mold design, when the outer side of the injection molded plastic part has a hole, a recess or a boss which is different from the opening and closing direction, the plastic part cannot be directly ejected by the ejector pin or other ejector mechanism. At this time, the slide block that forms this part on the mold must be a movable core that can move laterally, so that the lateral forming slide block is pulled out before the plastic part is ejected, and then the plastic part is ejected from the mold. Otherwise, it cannot be stripped and the product will be damaged. The entire mechanism that drives the laterally formed part to move laterally is called a slide core pulling mechanism. The inclined ejector is a mechanism used to form the hook of the product in mold design. When the inner or outer side of the product wall has a reverse buckle, using an inclined ejector is often a very effective method. When ejecting, the inclined ejector moves horizontally relative to the product, thereby causing the product to separate. The general working principle of the inclined ejector: the inclined ejector is pushed forward at a certain angle, and after a certain distance, it moves horizontally relative to the product, thereby causing the product to separate. The position of the product buckle is separated from the inside of the plastic, thereby allowing the product to be easily removed.

[0003] The inventor found that the existing injection mold stripping mechanism has the following shortcomings:

[0004] The action is single, only capable of stripping the regular reverse buckle structure, and the adaptation range is small. SUMMARY

[0005] The purpose of the present application is to provide an injection mold stripping mechanism and an injection mold, which can adapt to the stripping of complex reverse buckle structures, have a wide adaptation range, are convenient and reliable to strip, and are not easy to damage the plastic part.

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

[0007] In a first aspect, the present application provides an injection mold stripping mechanism for stripping an injection molded part having an inner recess with an opening, the inner recess having opposite first and second wall surfaces, the first and second wall surfaces being inclinedly arranged, the distance between the two sides close to the opening being smaller than the distance between the two sides away from the opening; comprising:

[0008] a shovel base connected with the movable mold core, a clearance slide block, an inclined ejector block and an ejector pin assembly, the clearance slide block being slidably connected with the shovel base in a first direction having an included angle with the opening and closing direction, and the two being relatively fixed in the opening and closing direction; the clearance slide block and the inclined ejector block being slidably connected in a second direction having an included angle with the first direction; the inclined ejector block being connected with the ejector pin assembly;

[0009] The yield slider has a first position and a second position which are switched with each other. When in the first position, the yield slider has a spacing with the surface of the inclined ejector block for forming the molding cavity of the inner recess, so that the yield slider and the inclined ejector block can move together towards the demolding direction under the action of the ejector assembly. When in the second position, the yield slider and the inclined ejector block jointly cooperate for participating in forming the molding cavity of the inner recess.

[0010] In an optional embodiment, a first sliding part is arranged on the shovel base, a second sliding part is arranged on the yield slider, one of the first sliding part and the second sliding part is a sliding groove, and the other is a protrusion; the first sliding part and the second sliding part are slidably connected in the first direction.

[0011] In an optional embodiment, the cross-sectional profile of the first sliding part and the second sliding part is dovetail-shaped or "T"-shaped.

[0012] In an optional embodiment, a first limiting part is arranged on the yield slider, and a second limiting part is arranged on the inclined ejector block; the first limiting part and the second limiting part are used for abutting when the yield slider is in the first position, so that the inclined ejector block can drive the yield slider to move synchronously towards the demolding direction.

[0013] In an optional embodiment, the first limiting part is arranged as a sliding groove, and the second limiting part is arranged as a limiting rod; part of the limiting rod is inserted into the sliding groove, and the limiting rod can abut against the groove wall of the sliding groove when the yield slider is in the first position.

[0014] In an optional embodiment, the sliding groove has a first groove wall and a second groove wall which are arranged in the second direction; the second groove wall is located on the side of the first groove wall close to the shovel base; when in the first position, the limiting rod abuts against the first groove wall, and when in the second position, the limiting rod abuts against the second groove wall.

[0015] In an optional embodiment, the demolding mechanism of the injection mold further comprises an elastic member which is connected to the inclined ejector block and the yield slider at the same time, so that the yield slider has a tendency to move from the second position to the first position.

[0016] In an optional embodiment, the elastic member is arranged as a spring, a spring sheet or a rubber member; the yield slider is provided with a receiving hole, the elastic member is inserted into the receiving hole, one end of the elastic member is connected to the hole bottom wall of the receiving hole, and the other end abuts against the inclined ejector block.

[0017] In an optional embodiment, the ejector pin assembly comprises an ejector pin base plate, an ejector pin face plate, an inclined ejector seat, an inclined guide rod and an inclined ejector rod, the ejector pin base plate is connected with the ejector pin face plate, the inclined ejector seat is slidably connected with the ejector pin face plate in the opening direction, the inclined guide rod is arranged in the inclined ejector seat and slidably connected with the inclined ejector seat, the inclined guide rod is used for being fixed on the fixed die base plate, one end of the inclined ejector rod is fixedly connected with the inclined ejector seat, and the other end of the inclined ejector rod is connected with the inclined ejector block.

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

[0019] The injection mold opening mechanism according to any one of the preceding embodiments.

[0020] The injection mold opening mechanism according to any one of the preceding embodiments.

[0021] In summary, the injection mold opening mechanism provided by the present embodiment can open the inner recess part with inconsistent inner cavity sizes on the plastic part. Specifically, after the mold is closed, the displacement slide block and the inclined ejector block cooperate, and the fixed mold core and the movable mold core jointly define the injection cavity. Part of the surface of the displacement slide block and part of the surface of the inclined ejector block are used to form the inner wall surface of the inner recess part. After the injection is completed, the mold is opened, the movable mold core is driven by the movable mold plate to move away from the fixed mold core in the opening direction, in this process, the shovel base moves with the movable mold core, and the displacement slide block moves in the first direction with the shovel base and also moves in the second direction relative to the inclined ejector block. It can be understood that the second direction is the combined movement direction of the opening and closing directions and the first direction, that is, the displacement slide block can slide relative to the shovel base and the inclined ejector block, the displacement slide block is first demolded from the plastic part, and the distance between the structure formed by the displacement slide block and the inclined ejector block in the opening and closing direction is not greater than the distance between the first wall surface and the second wall surface of the inner recess part on the side close to the opening, then the inclined ejector block and the displacement slide block are driven by the ejector pin assembly to move in the demolding direction, and the inclined ejector block and the displacement slide block can also be demolded from the inner recess part in the process of lifting the plastic part away from the fixed mold core, finally the demolding of the plastic part is realized. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0023] Figure 1 The structure diagram of the plastic part of the present embodiment;

[0024] Figure 2Schematic diagram of the injection mold stripping mechanism and the plastic part cooperation (clamping state) of the embodiment of the present application;

[0025] Figure 3 Schematic diagram of the structure of the injection mold stripping mechanism of the embodiment of the present application;

[0026] Figure 4 Schematic diagram of the structure of the injection mold stripping mechanism of the embodiment of the present application;

[0027] Figure 5 Schematic diagram of the structure of the injection mold stripping mechanism of the embodiment of the present application;

[0028] Figure 6 Schematic diagram of the structure of the shovel base of the embodiment of the present application;

[0029] Figure 7 Schematic diagram of the cooperation of the inclined block and the yield slide block of the embodiment of the present application;

[0030] Figure 8 Schematic diagram of the structure of the yield slide block of the embodiment of the present application from one perspective;

[0031] Figure 9 Schematic diagram of the structure of the yield slide block of the embodiment of the present application from another perspective;

[0032] Figure 10 Schematic diagram of the partial structure of the injection mold of the embodiment of the present application;

[0033] Figure 11 Schematic diagram of the partial structure of the injection mold of the embodiment of the present application;

[0034] Figure 12 Schematic diagram of the partial structure of the injection mold of the embodiment of the present application.

[0035] Figure:

[0036] 001 - plastic part; 011 - inner recess; 012 - opening; 013 - first wall surface; 014 - second wall surface; 100 - spade base; 110 - guide slope; 120 - first sliding portion; 200 - displacement slider; 201 - first side surface; 202 - second side surface; 210 - second sliding portion; 220 - first limiting portion; 221 - first slot wall; 222 - second slot wall; 230 - accommodating hole; 300 - inclined ejector; 301 - third side surface; 302 - fourth side surface; 303 - fifth side surface; 310 - second limiting portion; 320 - limiting slot; 400 - ejector assembly; 410 - ejector bottom plate; 420 - ejector face plate; 421 - strip-shaped hole; 430 - inclined ejector seat; 440 - inclined guide rod; 450 - inclined ejector rod; 500 - auxiliary demolding ejector; 600 - fixed mold plate; 700 - fixed mold core; 800 - elastic member. DETAILED DESCRIPTION

[0037] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0039] It should be noted that: similar reference numbers and letters represent 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.

[0040] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation and cannot be understood as indicating or implying relative importance.

[0041] In addition, the terms "horizontal", "vertical", and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0042] In the description of the present application, it should be further pointed out that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0043] At present, the side core-pulling slider mechanism can only demold the position where the regular groove or hole of the plastic part 001 is located. When the slot width of the groove is less than the width of the groove depth or the opening width of the hole is less than the opening width of the hole body, the slider cannot smoothly enter and exit the opening 012, thereby causing demolding failure or damage to the plastic part 001.

[0044] In view of this, the designer designs a demolding mechanism for injection mold, which can demold the part of the plastic part 001 where the slot width of the groove is less than the width of the groove depth, and can also demold the part of the plastic part 001 where the opening width of the hole is less than the opening width of the hole body.

[0045] Please refer to Figure 1 , Figure 2 and combine Figure 9 , wherein the groove or hole can also be referred to as the inner recess 011. The slot of the groove and the opening of the hole can be referred to as the opening 012 of the inner recess 011. For example, in the present embodiment, the plastic part 001 with a substantially square cross-sectional profile of the inner recess 011 is taken as an example for description. The inner recess 011 has a first wall surface 013 and a second wall surface 014 arranged oppositely and obliquely, the distance between the side of the first wall surface 013 and the second wall surface 014 close to the opening 012 is D1, the distance between the side of the first wall surface 013 and the second wall surface 014 away from the opening 012 is D2, D1 is less than D2, and the distance between the first wall surface 013 and the second wall surface 014 gradually decreases from D2 to D1, that is, the distance between the first wall surface 013 and the second wall surface 014 is gradually changed. It can be understood that when the plastic part 001 is completed by injection molding, the first wall surface 013 of the plastic part 001 is located above the second wall surface 014 and is arranged substantially horizontally.

[0046] Please refer to Figure 2 and Figure 3In the embodiment, the injection mold stripping mechanism includes a shovel base 100, a let-out slider 200, an inclined ejector block 300, and a ejector pin assembly 400. The shovel base 100 is used to be fixedly connected with the movable mold core through bolts or other fasteners. The let-out slider 200 is slidably connected with the shovel base 100 in a first direction having an angle with the mold opening and closing direction, and the two are relatively fixed in the mold opening and closing direction. The let-out slider 200 is slidably connected with the inclined ejector block 300 in a second direction having an angle with the first direction. The inclined ejector block 300 is connected with the ejector pin assembly 400.

[0047] The let-out slider 200 has a first position and a second position which are switched with each other. When in the first position, the let-out slider 200 and the inclined ejector block 300 have a spacing from the surface of the molding cavity for forming the inner recess 011, so that the let-out slider 200 and the inclined ejector block 300 can move together in the stripping direction under the action of the ejector pin assembly 400. When in the second position, the let-out slider 200 and the inclined ejector block 300 jointly cooperate to participate in forming the molding cavity of the inner recess 011.

[0048] The working principle of the injection mold stripping mechanism provided in the embodiment is as follows:

[0049] Please refer to Figures 2-5 , wherein Figure 3In the middle, A represents the opening and closing direction, B represents the first direction, C represents the second direction, and the shovel base 100 moves upward during mold opening. After the mold is closed, the displacement slider 200 is guided by the shovel base 100 to be in the second position, and the displacement slider 200 cooperates with the inclined ejector block 300, and the fixed mold core 700 and the movable mold core together define the injection cavity. Part of the surface of the displacement slider 200 and part of the surface of the inclined ejector block 300 are used to form the inner wall surface of the inner recess 011. After the plastic part 001 is injection molded, the movable mold plate is driven by a press machine to perform the mold opening action, and the movable mold core is driven by the movable mold plate to move away from the fixed mold core 700 in the opening and closing direction. During this process, the shovel base 100 moves with the movable mold core, and under the driving of the shovel base 100, the displacement slider 200 moves in the first direction with the shovel base 100 and also moves in the second direction relative to the inclined ejector block 300. It can be understood that the second direction is the combined movement direction of the opening and closing direction and the first direction, that is, the displacement slider 200 can slide relative to the shovel base 100 and the inclined ejector block 300 under the driving of the shovel base 100, the displacement slider 200 is demolded first, and the part of the structure formed by the displacement slider 200 and the inclined ejector block 300 inserted into the inner recess 011 in the opening and closing direction The maximum distance D3 between the first wall surface 013 and the second wall surface 014 on the side close to the opening 012 is not greater than the distance D1. In this way, the displacement slider 200 and the inclined ejector block 300 can smoothly pass through the opening 012 for demolding, that is, next, under the action of the ejector pin assembly 400, the inclined ejector block 300 and the displacement slider 200 are driven to move in the demolding direction, and the inclined ejector block 300 and the displacement slider 200 can also pass through the opening 012 to demold the inner recess 011 during the process of ejecting the plastic part 001 from the fixed mold core 700, so that the inclined ejector block 300 is separated from the plastic part 001, and finally the plastic part 001 is demolded.

[0050] Please refer to Figure 6 In the embodiment, optionally, the shovel base 100 has a guide slope 110, and the first sliding part 120 is arranged on the guide slope 110. The first sliding part 120 is a strip-shaped protrusion, and the cross-sectional profile of the first sliding part 120 is dovetail-shaped or “T”-shaped, wherein the cross-sectional plane is a plane perpendicular to the length direction of the first sliding part 120.

[0051] When the shovel base 100 is assembled to the movable mold core by the fasteners such as bolts, the guide slope 110 has an included angle with the opening and closing direction, and the inclination direction of the guide slope 110 is consistent with the first direction.

[0052] Please refer to Figures 7-9In the embodiment, the second sliding part 210 and the first limiting part 220 are arranged on the let-in slider 200. The second sliding part 210 can be of a split structure, so that the two parts can be made of different materials, thereby reducing the cost. The second sliding part 210 can be fixed on the let-in slider 200 by screws or other fasteners. Meanwhile, the second sliding part 210 is provided with a groove, and the cross-sectional profile of the groove is dovetail-shaped or T-shaped. The first sliding part 120 and the second sliding part 210 are slidably connected, so that the cross-sectional shapes of the first sliding part 120 and the second sliding part 210 are basically the same. It should be noted that the second sliding part 210 can also be a groove directly arranged on the let-in slider 200. In addition, in other embodiments, the first sliding part 120 can be a groove, and correspondingly, the second sliding part 210 can be a protrusion.

[0053] The first limiting part 220 is arranged as a sliding groove. The first limiting part 220 is a strip-shaped groove. The first limiting part 220 extends along the second direction. The first limiting part 220 has a first groove wall 221 and a second groove wall 222 in the second direction. The second groove wall 222 is located on the side of the first groove wall 221 close to the base 100.

[0054] Further, the let-in slider 200 is further provided with a receiving hole 230. The receiving hole 230 is a blind hole. An elastic member 800 is arranged in the receiving hole 230. One end of the elastic member 800 abuts against the hole bottom wall of the receiving hole 230. When the elastic member 800 is in a natural state, the end of the elastic member 800 away from the hole bottom wall of the receiving hole 230 can extend out of the hole opening of the receiving hole 230.

[0055] Further, the surface of the let-in slider 200 has a first side surface 201 for constituting a forming cavity and a second side surface 202 capable of being attached to the inclined ejector pin 300. The first side surface 201 and the second side surface 202 are parallel. When the let-in slider 200 is assembled with the base 100, the first side surface 201 and the second side surface 202 on the let-in slider 200 are arranged obliquely to the horizontal plane, and the oblique direction is consistent with the second direction.

[0056] Please refer to Figure 3 Further, the second side surface 202 is provided with an auxiliary demolding ejector pin 500. Part of the auxiliary demolding ejector pin 500 is embedded in the second side surface 202, and part of the auxiliary demolding ejector pin 500 protrudes from the second side surface 202. The part protruding from the second side surface 202 is a flat triangular prism structure.

[0057] Optionally, the inclined ejector block 300 has a third side surface 301, a fourth side surface 302 and a fifth side surface 303 connected in sequence, the third side surface 301 and the fourth side surface 302 are used to form a forming cavity of the molded plastic part 001. The fifth side surface 303 is used to be in slidable contact with the second side surface 202. The inclined ejector block 300 is further provided with a second limiting part 310, which is a limiting rod. The limiting rod can be screwed on the inclined ejector block 300, and a part of the limiting rod can be inserted into the sliding groove and can reciprocate in the sliding groove along the second direction. When the yielding slide block 200 is in the first position, the limiting rod is in abutment with the first groove wall 221, and when the yielding slide block 200 is in the second position, the limiting rod is in abutment with the second groove wall 222. In this way, the yielding slide block 200 can be stably positioned at the first position or the second position through the cooperation of the limiting rod and the sliding groove.

[0058] Further, the fifth side surface 303 of the inclined ejector block 300 is provided with two limiting grooves 320. When the yielding slide block 200 is in the first position, the auxiliary demolding ejector block 500 is clamped with one of the limiting grooves 320; when the yielding slide block 200 is in the second position, the auxiliary demolding ejector block 500 is clamped with the other limiting groove 320 of the two limiting grooves 320. This further improves the stability of the yielding slide block 200 at the first position and the second position, and the relative position of the inclined ejector block 300 and the yielding slide block 200 is not easy to change during demolding. When the yielding slide block 200 is in the first position, the inclined ejector block 300 moves obliquely under the drive of the ejector pin mechanism, and the yielding slide block 200 can be driven to slide together by the auxiliary demolding ejector block 500, so that the demolding is more smooth.

[0059] It should be noted that when the yielding slide block 200 is in the second position, it is in a clamping state, and the yielding slide block 200 cooperates with the inclined ejector block 300 to form a forming cavity. The end of the elastic member 800 on the yielding slide block 200 protruding from the containing hole 230 abuts against the inclined ejector block 300, and the elastic member 800 makes the yielding slide block 200 have a tendency to move from the second position to the first position, thereby assisting the demolding of the yielding slide block 200. That is, during the opening process, the yielding slide block 200 moves along the first direction and the second direction simultaneously under the drive of the shovel base 100 and needs to be separated from the plastic part 001, and the elastic force of the elastic member 800 is consistent with the demolding direction of the yielding slide block 200, thereby facilitating the sliding of the yielding slide block 200 relative to the inclined ejector block 300.

[0060] It should be understood that in other embodiments, a guide hole can be provided on the inclined ejector block 300, and the yielding slide block 200 can be slidably arranged in the guide hole. The cooperation between the yielding slide block 200 and the inclined ejector block 300 is more compact.

[0061] It should be noted that the distance between the second side surface 202 away from the side of the shovel base 100 and the third side surface 301 away from the side of the shovel base 100 is substantially equal to D2 and greater than D1 when the displacement slider 200 is in the second position. Direct demolding will cause the displacement slider 200 and the inclined ejector block 300 to be stuck by the opening 012 and cannot be separated from the plastic part 001, and even cause the plastic part 001 to be broken and the product to be scrapped. Therefore, before the inclined ejector block 300 and the displacement slider 200 are demolded, the shovel base 100 is used to drive the displacement slider 200 to demold in the second direction. In this process, the needle assembly 400 is not started, the inclined ejector block 300 is not actuated, and only the displacement slider 200 moves in the second direction by a set distance, which is determined by the first limiting portion 220 and the second limiting portion 310. That is, when the displacement slider 200 moves from the second position to the first position, the first limiting portion 220 just abuts against the second limiting portion 310. At this time, the mold is opened, the movement of the shovel base 100 stops, and the maximum distance D3 of the part of the structure formed by the displacement slider 200 and the inclined ejector block 300 in the inner recess 011 is less than or equal to D1, wherein the maximum distance is the vertical distance between the second side surface 202 of the displacement slider 200 away from the side of the shovel base 100 and the third side surface 301. The displacement slider 200 and the inclined ejector block 300 can smoothly demold through the opening 012. Specifically, the needle assembly 400 is started, driving the inclined ejector block 300 to move obliquely, and the inclined ejector block 300 drives the displacement slider 200 to move obliquely synchronously through the auxiliary demolding ejector block 500. The displacement slider 200 and the inclined ejector block 300 lift the plastic part 001 in the process of moving in the horizontal direction to separate from the inner recess 011 until the demolding is completed.

[0062] Please combine Figures 9-12In the embodiment, the ejector assembly 400 includes an ejector base plate 410, an ejector face plate 420, an inclined ejector seat 430, an inclined guide rod 440, and an inclined ejector rod 450. The ejector base plate 410 is connected to the fixed mold plate 600 through a guide sleeve. The ejector face plate 420 is arranged on the ejector base plate 410 and can be lifted or lowered by the ejector face plate 420. The ejector face plate 420 is provided with a strip-shaped hole 421 extending in the demolding direction. The inclined ejector seat 430 is embedded in the strip-shaped hole 421 and slidably connected to the ejector face plate 420 in the demolding direction. Meanwhile, the inclined ejector seat 430 is relatively fixed to the ejector face plate 420 in the opening and closing direction. For example, the inclined ejector seat 430 and the strip-shaped hole 421 can be matched through a dovetail structure or a T-shaped structure. The inclined guide rod 440 is arranged in the inclined ejector seat 430 and slidably connected to the inclined ejector seat 430. The inclined guide rod 440 is used to be fixed to the fixed mold base plate. One end of the inclined ejector rod 450 is fixedly connected to the inclined ejector seat 430, and the other end of the inclined ejector rod 450 is connected to the inclined ejector block 300. After the mold is opened, the shovel base 100 drives the let-in slide block 200 to move to the first position. Then, the telescopic cylinder is used to lift the ejector base plate 410, so that the ejector base plate 410 is away from the fixed mold plate 600, thereby lifting the ejector face plate 420, the inclined ejector seat 430 and the inclined ejector rod 450 through the ejector base plate 410. Under the guidance of the inclined guide rod 440, the inclined ejector seat 430 drives the inclined ejector rod 450 to move in the demolding direction, so that the inclined ejector rod 450 drives the inclined ejector block 300 and the let-in slide block 200 to separate from the plastic part 001 in the process of lifting the plastic part 001, thereby achieving demolding.

[0063] The demolding mechanism of the injection mold provided in the embodiment can realize the demolding operation of the inner concave part 011 of the plastic part 001 through step-by-step demolding. After demolding, the plastic is not easy to be damaged, the product yield is improved, and the cost is reduced.

[0064] The embodiment also provides an injection mold, which includes the demolding mechanism of the injection mold mentioned in the above embodiment, and further includes a fixed mold plate 600, a fixed mold core 700, a movable mold plate, a movable mold core and the like. The fixed mold core 700 is fixed to the fixed mold plate 600, and the movable mold core is fixed to the movable mold plate. The fixed mold plate 600 and the movable mold plate are slidably connected through guide columns and guide sleeves. The movable mold plate can be driven by a power mechanism such as a press to move relative to the fixed mold core 700 to realize the opening and closing action of the mold.

[0065] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A demolding mechanism for an injection mold, used to demold a recess (011) having an opening (012) in an injection molded part (001), the recess (011) having opposing first wall surfaces (013) and second wall surfaces (014), the first wall surfaces (013) and the second wall surfaces (014) being inclinedly arranged, the distance between the sides of the two surfaces near the opening (012) being less than the distance between the sides of the two surfaces away from the opening (012); characterized in that, include: The components for connecting to the moving mold core are a shovel base (100), a clearance slider (200), an angled ejector block (300), and an ejector pin assembly (400). The clearance slider (200) is slidably connected to the shovel base (100) in a first direction having an angle with the mold opening and closing direction, and the two are relatively fixed in the mold opening and closing direction. The clearance slider (200) is slidably connected to the angled ejector block (300) in a second direction having an angle with the first direction. The angled ejector block (300) is connected to the ejector pin assembly (400). The clearance slider (200) has a first position and a second position that can be switched between each other. When it is in the first position, the clearance slider (200) and the inclined ejector block (300) have a distance between their surfaces used to form the molding cavity of the concave portion (011), so that the clearance slider (200) and the inclined ejector block (300) can move together in the demolding direction under the action of the ejector pin assembly (400). When it is in the second position, the clearance slider (200) and the inclined ejector block (300) cooperate to participate in forming the molding cavity of the concave portion (011). The inclined top block is provided with a guide hole, and the clearance slider is slidably disposed in the guide hole.

2. The injection mold demolding mechanism according to claim 1, characterized in that: The shovel base (100) is provided with a first sliding part (120), and the clearance slider (200) is provided with a second sliding part (210). One of the first sliding part (120) and the second sliding part (210) is a groove, and the other is a protrusion. The first sliding part (120) and the second sliding part (210) are slidably connected in the first direction.

3. The injection mold demolding mechanism according to claim 2, characterized in that: The cross-sectional profiles of the first sliding part (120) and the second sliding part (210) are swallowtail-shaped or "T"-shaped.

4. The injection mold demolding mechanism according to claim 1, characterized in that: The clearance slider (200) is provided with a first limiting part (220), and the inclined ejector block (300) is provided with a second limiting part (310). The first limiting part (220) and the second limiting part (310) are used to abut against each other when the clearance slider (200) is in the first position, so that the inclined ejector block (300) can drive the clearance slider (200) to move synchronously in the demolding direction.

5. The injection mold demolding mechanism according to claim 4, characterized in that: The first limiting part (220) is configured as a sliding groove, and the second limiting part (310) is configured as a limiting rod. Part of the limiting rod is inserted into the sliding groove. When the yielding slider (200) is in the first position, the limiting rod can abut against the groove wall of the sliding groove.

6. The injection mold demolding mechanism according to claim 5, characterized in that: The chute has a first chute wall (221) and a second chute wall (222) arranged at intervals in the second direction, the second chute wall (222) being located on the side of the first chute wall (221) near the shovel base (100); when in the first position, the limiting rod abuts against the first chute wall (221), and when in the second position, the limiting rod abuts against the second chute wall (222).

7. The injection mold demolding mechanism according to claim 5, characterized in that: The injection mold demolding mechanism further includes an elastic element (800), which is connected to both the inclined ejector block (300) and the clearance slider (200) so that the clearance slider (200) tends to move from the second position to the first position.

8. The injection mold demolding mechanism according to claim 7, characterized in that: The elastic element (800) is configured as a spring, a sheet, or a rubber component; the yielding slider (200) is provided with a receiving hole (230), the elastic element (800) is inserted into the receiving hole (230), one end of the elastic element (800) is connected to the bottom wall of the receiving hole (230), and the other end abuts against the inclined top block (300).

9. The injection mold demolding mechanism according to claim 1, characterized in that: The ejector assembly (400) includes an ejector base plate (410), an ejector panel (420), an inclined ejector seat (430), an inclined guide rod (440), and an inclined ejector rod (450). The ejector base plate (410) is connected to the ejector panel (420), and the inclined ejector seat (430) is slidably connected to the ejector panel (420) in the demolding direction. The inclined guide rod (440) passes through the inclined ejector seat (430) and the two are slidably connected. The inclined guide rod (440) is used to fix it to the mold base plate. One end of the inclined ejector rod (450) is fixedly connected to the inclined ejector seat (430), and the other end of the inclined ejector rod (450) is connected to the inclined ejector block (300).

10. An injection mold, characterized in that, The injection mold includes: The injection mold demolding mechanism according to any one of claims 1-9.

Images