Inner fastener injection mold convenient to demold

Abstract

The utility model relates to the technical field of injection molding, in particular to an inner fastener injection mold convenient to demold, which comprises a demolding mechanism, an upper mold core, a lower mold core and a cavity arranged between the upper mold core and the lower mold core, and the cavity comprises a product body forming groove and an inner fastener forming groove communicated with the product body forming groove. The inner wall of the product body forming groove is concavely arranged towards the lower mold core to form the inner fastener forming groove; the demolding mechanism comprises a first ejection assembly, a second ejection assembly and a buckle body forming groove formed in one end of the first ejection assembly. According to the utility model, the buckle body forming groove is arranged on the demolding mechanism, the demolding mechanism firstly ejects a product out of the product body forming groove, and then the inner buckle structure is separated from the buckle body forming groove, so that the problem that the formed product is damaged in the releasing process is avoided, the inner buckle structure is convenient to demold, and the demolding efficiency is improved. And the reject ratio of products is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection molding technical field, concretely relates to an inner buckle injection mold convenient to demould. BACKGROUND

[0002] Plastic products have been more common products now, injection molding is widely used in the production of various plastic products, including digital, household appliances, daily necessities and various fields such as products.

[0003] Some injection molding products are provided with inner buckles, the inner buckles have inner buckle structures, and the products are connected with other products through the inner buckle structures. When injection molding, a groove for forming the inner buckle structure is arranged in the mold, the molten plastic flows into the groove, and the inner buckle structure is formed after cooling.

[0004] The existing mold applied to the inner buckle structure prevents the damage of the inner buckle structure during demolding, generally a plurality of movable parting surfaces are used, the product is removed by moving the parting surface to create a little space, so as to avoid the damage of the inner buckle structure during the product removal. The structure of the plurality of parting surfaces will cause the mold to be more complex, and the complex mold is not only easy to damage but also inconvenient to maintain. Therefore, there is an urgent need for a solution. UTILITY MODEL CONTENT

[0005] In view of the above problems, the utility model aims at providing an inner buckle injection mold convenient to demold, which effectively solves the problem of complex demolding mechanism in the existing mold for inner buckle injection molding products.

[0006] The technical scheme solved by the utility model is an inner buckle injection mold convenient to demold, which comprises a demolding mechanism, an upper mold core, a lower mold core and a cavity arranged between the upper mold core and the lower mold core, the cavity comprises a product body forming groove and an inner buckle forming groove communicated with the product body forming groove, and the inner buckle forming groove is concave from the inner wall of the product body forming groove to the lower mold core.

[0007] The demolding mechanism comprises a first ejection assembly, a second ejection assembly, a buckle body forming groove arranged at one end of the first ejection assembly and a driving member drivingly connected with the first ejection assembly and the second ejection assembly respectively, and the buckle body forming groove is communicated with the inner buckle forming groove.

[0008] One end of the first ejection assembly protrudes into the inner buckle forming groove, the second ejection assembly can protrude into the product body forming groove, the first ejection assembly and the second ejection assembly can slide relative to the lower die core, the driving member can drive the first ejection assembly and the second ejection assembly to move up and down synchronously relative to the lower die core to eject the product after injection molding into the product body forming groove; the driving member can also drive the second ejection assembly to move up and down alone to eject the inner buckle after forming into the buckle body forming groove.

[0009] Preferably, the driving member includes a driving plate and a limiting plate, the limiting plate is installed on one side of the driving plate close to the lower die core, the end of the first ejection assembly and the second ejection assembly are installed in the limiting plate, the end of the first ejection assembly is connected with the driving plate through the first spring, and the end of the second ejection assembly is fixedly connected with the limiting plate.

[0010] Preferably, the demolding structure further comprises a guide column, the guide column is fixed opposite to the lower die core, one end of the guide column penetrates through the second ejection assembly and protrudes into the product body forming groove.

[0011] Preferably, the first ejection assembly comprises a limiting rod and a giving-in rod, the end of the limiting rod is inserted into the limiting plate and connected with the driving plate through the first spring, the giving-in rod is arranged at the end of the limiting rod away from the driving plate and inserted into the inner buckle forming groove, and the end of the giving-in rod inserted into the inner buckle forming groove is provided with the buckle body forming groove.

[0012] Preferably, the rear mold and the front mold are further included, the lower die core is installed on the rear mold and fixed relative to the rear mold, the upper die core is installed on the front mold and fixed relative to the front mold, the driving member is located inside the rear mold and connected with the rear mold through the auxiliary guide rod, the rear mold is provided with a sliding hole communicated with the inner buckle forming groove, the giving-in rod is inserted into the sliding hole and connected with the sliding hole in sliding mode, and the diameter of the limiting rod is greater than the diameter of the sliding hole for limiting the moving distance of the limiting rod.

[0013] Preferably, the rear mold comprises a bearing plate, a support plate and a bottom plate, the support plate is provided between the bottom plate and the bearing plate to form a containing space for the sliding of the driving plate, the bearing plate is provided with a containing groove for containing the lower die core, and the lower die core is installed in the containing groove.

[0014] Preferably, the auxiliary guide rod is provided between the bottom plate and the bearing plate, the auxiliary guide rod penetrates through the driving plate for limiting and guiding the driving plate, and the auxiliary guide rod is sleeved with a second spring having two ends connected with the driving plate or the bearing plate.

[0015] Preferably, the bottom plate is provided with an auxiliary hole, the auxiliary hole is used for containing the output end of the power structure and making the output end of the power structure act on the driving plate.

[0016] Preferably, the yielding rod is detachably connected with the limiting rod; or the yielding rod is telescopically connected with the limiting rod.

[0017] The utility model discloses the beneficial effect that:

[0018] The utility model discloses a first ejection assembly and second ejection assembly are driven to product body with inner buckle is removed after the inner buckle forming groove, and then the second ejection assembly is used for ejecting the buckle body forming groove in the first ejection assembly. The utility model discloses the structure of stripping structure is simple, and the stripping structure is cooperated with the cavity and forms the inner buckle, first, product body and the inner buckle are synchronously ejected to the product forming body forming groove above, then the inner buckle structure is ejected the inner buckle forming groove, and the structure of inner buckle injection mold is simplified, and the whole assembly and cleaning of inner buckle injection mold are facilitated, the inner buckle is not easy to be damaged in stripping process, and the bad rate of product is greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the three-dimensional structure schematic diagram of the utility model, and

[0020] Figure 2 It is the cut right view structure schematic diagram of the utility model,

[0021] Figure 3 It is the cut main view structure schematic diagram of the utility model,

[0022] Figure 4 It is the cut right view structure schematic diagram of the utility model after opening the mould,

[0023] Figure 5 It is the three-dimensional structure schematic diagram of the utility model middle rear mould,

[0024] Figure 6 It is the cut right view structure schematic diagram of the utility model rear mould after product removal inner buckle forming groove,

[0025] Figure 7 It is the cut right view structure schematic diagram of the utility model rear mould after product removal buckle body forming groove,

[0026] Figure 8 It is the three-dimensional structure schematic diagram of the utility model, Figure 7 The enlarged view of A in the utility model,

[0027] In the figure, 1 - demoulding mechanism; 2 - upper die core; 3 - lower die core; 4 - cavity; 5 - product body forming groove; 6 - inner buckle forming groove; 101 - first ejection assembly; 102 - second ejection assembly; 103 - buckle body forming groove; 104 - driving member; 1041 - driving plate; 1042 - limiting plate; 1043 - first spring; 105 - guide column; 1011 - give way rod; 1012 - limiting rod; 7 - back mould; 8 - front mould; 9 - auxiliary guide rod; 10 - sliding hole; 701 - bearing plate; 702 - support plate; 703 - bottom plate; 704 - containing groove; 11 - second spring; 12 - auxiliary hole. DETAILED DESCRIPTION

[0028] The specific embodiments of the utility model are further described in detail below with reference to the accompanying drawings.

[0029] Refer to the description accompanying Figures 1-8 A inner buckle injection mold convenient to demould, including demoulding mechanism 1, upper die core 2, lower die core 3 and the cavity 4 being set between upper die core 2 and lower die core 3, demoulding mechanism 1 and lower die core 3 are installed in back mould 7, upper die core 2 is installed in front mould 8, and the closure between upper die core 2 and lower die core 3 is realized by the relative movement between front mould 8 and back mould 7, the cavity 4 formed after the closure of upper die core 2 and lower die core 3, and the molten plastic flows into the cavity 4 and solidifies in the cavity 4 to form;

[0030] Wherein back mould 7 is generally a movable mould, and will move relative to front mould 8 during injection molding and opening and closing mould, and front mould 8 is generally a fixed mould, and will be provided with a flow channel for molten plastic to pass through and a cooling structure for cooling in front mould 8.

[0031] The cavity 4 includes product body forming groove 5 and inner buckle forming groove 6 communicated with product body forming groove 5, the shape of product body forming groove 5 is same as the product to be injection molded, and inner buckle forming groove 6 is concave from the inner wall of product body forming groove 5 to the inside of lower die core 3, and is used for injection molding of inner buckle on the product body.

[0032] Back mould 7 is divided into bottom plate 703, support plate 702 and bearing plate 701, bearing plate 701 is used for bearing lower die core 3, in order to better install lower die core 3, bearing plate 701 is also provided with containing groove 704, lower die core 3 is installed in containing groove 704, and containing groove 704 fixes and limits lower die core 3;

[0033] Support plate 702 is two and is parallelly arranged between bottom plate 703 and bearing plate 701, bottom plate 703, support plate 702 and bearing plate 701 form containing space with both sides open, and driving assembly 104 is arranged in the containing space and can slide relative to bearing plate 701 and lower die core 3.

[0034] A plurality of auxiliary guide rods 9 are arranged between the bottom plate 703 and the support plate 702, the auxiliary guide rods 9 penetrate the driving assembly 104 and are used for limiting and guiding the driving assembly 104, so that one end of the driving assembly 104 can always be in contact with the bottom plate 703 under the condition that no external force is applied to the driving assembly 104, and a second spring 11 is sleeved on the auxiliary guide rod 9, and the second spring 11 applies a certain pressure to the driving assembly 104.

[0035] The demolding mechanism 1 is used for pushing the injection molding product formed in the cavity 4 out, so that the injection molding product is separated from the lower mold core 3, and the demolding mechanism 1 comprises a first ejection assembly 101, a second ejection assembly 102, a buckle body forming groove 103 and a driving member 104, one end of the first ejection assembly 101 protrudes into the inner buckle member forming groove 6, the buckle body forming groove 103 is arranged at one end of the first ejection assembly 101 and can extend into the inner buckle member forming groove 6 and communicate with the inner buckle member forming groove 6, and the buckle body forming groove 103 is used for forming an inner buckle structure on the inner buckle member of the product, and the inner buckle structure arranged on the inner buckle member of the product comprises an inner buckle claw and the like. The driving member 104 can drive the first ejection assembly 101 and the second ejection assembly 102 to synchronously displace relative to the lower mold core 3, so as to push the molded product out of the product body forming groove 5, then the driving member 104 can drive the second ejection assembly 102 to move upward relative to the lower mold core 3 and the first ejection assembly 101, so as to further push the inner buckle structure of the product out of the buckle body forming groove 103. When the product is pushed out of the product body forming groove 5, the driving member 104 drives the second ejection assembly 102 to push the product upward again, so as to drive the product to move relative to the first ejection assembly 101, and then the inner buckle structure is pushed out of the buckle body forming groove 103, when the inner buckle structure extends out of the buckle body forming groove 103, the circumferential side wall of the product body forming groove 5 no longer limits the circumferential side of the inner buckle structure, the inner buckle structure can slightly elastically deform in a direction away from the buckle body forming groove 103, and the inner buckle structure is convenient to be pushed out of the buckle body forming groove 103.

[0036] The driving member 104 comprises a driving plate 1041 and a limiting plate 1042, the driving plate 1041 is located in the accommodating space formed between the bearing plate 701, the support plate 702 and the bottom plate 703, and the driving plate 1041 slides in the accommodating space, and the driving plate 1041 can drive the second ejection assembly 102 to move close to or away from the injection molding product through the limiting plate 1042, one end of the second spring 11 is in contact with the limiting plate 1042, and the other end is in contact with the bottom surface of the bearing plate 701, and the second spring 11 enables the driving plate 1041 to be in contact with the bottom plate 703 for a long time under the condition that no external force is applied;

[0037] The bearing plate 701 and the lower die core 3 are provided with through holes in communication with the injection molded product, the second ejection assembly 102 is inserted into the through hole and in contact with the injection molded product, and the second ejection assembly 102 is driven by the driving plate 1041 to push out the injection molded product during movement of the driving plate 1041;

[0038] Meanwhile, the bottom plate 703 is further fixedly connected with a guide column 105 inserted into the second ejection assembly 102, and the second ejection assembly 102 can adopt an existing hollow ejector rod; the end of the guide column 105 extends out of the second ejection assembly 102 and into the product body forming groove 5. On the one hand, the guide column 105 is used for auxiliary guiding, and on the other hand, the shape of the product body to be formed is limited or shaped by cooperation of the guide column 105 and the product body forming groove 5, so as to form the required product body.

[0039] The first ejection assembly 101 includes a yielding rod 1011 and a limiting rod 1012, the end of the limiting rod 1012 is inserted into the limiting plate 1042 and is slidably connected with the limiting plate 1042 through the first spring 1043, and the end of the limiting rod 1012 will be in contact with the bearing plate 701 during upward movement; the yielding rod 1011 is arranged at the end of the limiting rod 1012 away from the driving plate 1041 and is inserted into the inner buckle member forming groove 6, and the buckle body forming groove 103 is arranged on the end of the yielding rod 1011 inserted into the inner buckle member forming groove 6, when the driving plate 1041 drives the injection molded product to separate from the lower die core 3 through the second ejection assembly 102, the driving plate 1041 drives the buckle body forming groove 103 on the yielding rod 1011 to move out of the inner buckle member forming groove 6 through the limiting rod 1012;

[0040] The yielding rod 1011 and the limiting rod 1012 can be detachably connected through the insertion of the pin, and the yielding rod 1011 and the limiting rod 1012 can also have an inner sleeve structure, the limiting rod 1012 is sleeved on the outer side of the yielding rod 1011, and the extension and contraction connection between the yielding rod 1011 and the limiting rod 1012 is realized through the sleeving arrangement therebetween;

[0041] The detachable connection or the extension and contraction connection between the yielding rod 1011 and the limiting rod 1012 is used to increase the installation convenience between the yielding rod 1011 and the limiting rod 1012 and the universality of the first ejection assembly 101;

[0042] The rear mold 7 is provided with a sliding hole 10 communicated with the inner buckle forming groove 6, the accommodation rod 1011 is inserted into the sliding hole 10 and is in sliding connection with the sliding hole 10, the diameter of the limiting rod 1012 is greater than the diameter of the sliding hole 10, in the process that the driving plate 1041 drives the limiting rod 1012 and the accommodation rod 1011 to move upwards, the diameter of the sliding hole 10 limits the limiting rod 1012, the limiting rod 1012 is in abutment with the bearing plate 701, so that the accommodation rod 1011 and the limiting rod 1012 do not move any more after moving a certain distance;

[0043] At this time, the limiting rod 1012 is in sliding connection with the driving plate 1041 through the first spring 1043, the compression of the first spring 1043 provides a space for the driving plate 1041 and the limiting rod 1012, therefore, the driving plate 1041 can continue to move upwards and drive the second ejection assembly 102 to move. When the driving plate 1041 is reset, the first spring 1043 releases the elastic potential energy and drives the limiting rod 1012 to continue to protrude into the product body forming groove 5. Furthermore, the second ejection assembly 102 on the driving plate 1041 drives the injection molded product to move upwards away from the lower mold core 3, and since the buckle body forming groove 103 is partially located outside the inner buckle forming groove 6 at this time, the injection molded product will not cause damage to the buckle body forming groove 103 when it is separated from the buckle body forming groove 103 of the accommodation rod 1011.

[0044] In order to provide corresponding power for the driving plate 1041, the auxiliary hole 12 is formed in the bottom plate 703, and the output end of the power structure in the injection molding equipment acts on the driving plate 1041 through the auxiliary hole 12, so that the driving plate 1041 can be driven to move towards the lower mold core 3.

[0045] When the utility model is used, first, the mold 8 and the mold 7 are closed, the lower mold core 3 on the mold 7 and the upper mold core 2 on the mold 8 form a closed cavity 4, and the molten plastic flows into the cavity 4 through the runner under the action of the injection port on the mold 8. At this time, the accommodation rod 1011 penetrates the sliding hole 10 and protrudes into the inner buckle forming groove 6, and the molten plastic forms the inner buckle structure under the action of the buckle body forming groove 103.

[0046] When the injection molded product is pressurized and cooled for a period of time, the mold 8 and the mold 7 are separated by manual or automatic equipment, and the mold 8 and the mold 7 are separated. At the same time, the injection molded product is left on the mold 7 due to the action of the buckle body forming groove 103, the staff starts the power structure used in cooperation with the mold 7, the output end of the power structure acts on the driving plate 1041 through the auxiliary hole 12, and in the process that the driving plate 1041 is driven, the driving plate 1041 drives the injection molded product through the accommodation rod 1011 and the second ejection assembly 102, so that the product moves upwards out of the product forming groove 5.

[0047] When the limiting rod 1012 moves to the sliding hole 10, the buckle body forming groove 103 in the displacement rod 1011 is located outside the inner buckle forming groove 6 at this time, and under the limitation of the diameter of the sliding hole 10, the limiting rod 1012 cannot continue to move, but the driving plate 1041 can still drive the second ejection assembly 102 to move, at this time, the inner buckle structure of the injection molded product can be separated from the buckle body forming groove 103, and since the separation position at this time is located outside the inner buckle forming groove 6, the inner buckle forming groove 6 inner wall cannot cause extrusion to the buckle body forming groove 103, and the inner buckle structure of the product can be better separated from the buckle body forming groove 103.

[0048] When the driving plate 1041 is displaced relative to the limiting rod 1012, the end of the limiting rod 1012 compresses the first spring 1043, and when the driving plate 1041 is displaced relative to the base, the driving plate 1041 compresses the second spring 11, and when the power structure no longer applies a certain pressure to the driving plate 1041, under the action of the first spring 1043 and the second spring 11, the driving part 104, the limiting rod 1012 and the displacement rod 1011 return to the initial position.

[0049] The utility model discloses a first ejection assembly 101 and second ejection assembly 102 are driven by driving part 104, and after the product body with inner buckle is moved out of the inner buckle forming groove 6, the second ejection assembly 102 is used for ejecting the inner buckle from the buckle body forming groove 103 in the first ejection assembly 101. The structure of the demolding mechanism 1 is simple, the demolding mechanism and the cavity are matched to form the inner buckle, the product body and the inner buckle are first ejected synchronously to the product body forming groove 5, and then the inner buckle structure is ejected from the inner buckle forming groove 6, which simplifies the inner buckle injection mold structure, facilitates the overall assembly and cleaning of the inner buckle injection mold, and greatly reduces the product failure rate.

Claims

1. An inner buckle injection mold facilitating demolding, characterized in that, The mold stripping mechanism (1) includes a first ejection assembly (101), a second ejection assembly (102), a buckle body forming groove (103) arranged at one end of the first ejection assembly (101), and a driving member (104) drivingly connected with the first ejection assembly (101) and the second ejection assembly (102) respectively. One end of the first ejection assembly (101) protrudes into the inner buckle part forming groove (6), the second ejection assembly (102) can protrude into the product body forming groove (5), the first ejection assembly (101) and the second ejection assembly (102) can respectively slide up and down relative to the lower die core (3), and the driving member (104) can drive the first ejection assembly (101) and the second ejection assembly (102) to synchronously move up and down relative to the lower die core (3) to eject the product after injection molding to the product body forming groove (5); the driving member (104) can also drive the second ejection assembly (102) to move up and down alone to eject the molded inner buckle part to the buckle body forming groove (103). The driving member (104) includes a driving plate (1041) and a limiting plate (1042), the limiting plate (1042) is installed on one side of the driving plate (1041) close to the lower die core (3), the end portions of the first ejection assembly (101) and the second ejection assembly (102) are installed in the limiting plate (1042), the end portion of the first ejection assembly (101) is slidingly connected with the driving plate (1041) through a first spring (1043), and the end portion of the second ejection assembly (102) is fixedly connected with the limiting plate (1042).

2. The inner buckle injection mold facilitating demolding according to claim 1, characterized in that: The mold stripping mechanism (1) further includes a guide column (105), the guide column (105) is fixed opposite to the lower die core (3), one end of the guide column (105) penetrates through the second ejection assembly (102) and protrudes into the product body forming groove (5).

3. The inner buckle injection mold facilitating demolding according to claim 2, characterized in that: The first ejection assembly (101) includes a yielding rod (1011) and a limiting rod (1012), the end portion of the limiting rod (1012) is inserted into the limiting plate (1042) and slidingly connected with the driving plate (1041) through the first spring (1043), the yielding rod (1011) is arranged at one end of the limiting rod (1012) away from the driving plate (1041) and is inserted into the inner buckle part forming groove (6), and one end of the yielding rod (1011) inserted into the inner buckle part forming groove (6) is provided with the buckle body forming groove (103).

4. The inner buckle injection mold facilitating demolding according to claim 2, characterized in that: ​ 5. The inner buckle injection mold facilitating demolding according to claim 4, characterized in that: Also include the back die (7) and front die (8), the lower die (3) is installed on the back die (7) and is fixed relative to the back die (7), the upper die (2) is installed on the front die (8) and is fixed relative to the front die (8), the driving member (104) is located inside the back die (7) and is connected with the back die (7) through the auxiliary guide rod (9), the back die (7) is provided with a sliding hole (10) communicated with the inner buckle member forming groove (6), the let go of the rod (1011) is inserted into the sliding hole (10) and is connected with the sliding hole (10), the limiting rod (1012) is greater than the diameter of the sliding hole (10) for limiting the moving distance of the limiting rod (1012).

6. The inner buckle injection mold facilitating demolding according to claim 5, characterized in that: The back die (7) includes a bearing plate (701), a support plate (702) and a bottom plate (703), the support plate (702) is provided between the bottom plate (703) and the bearing plate (701) to form a containing space for the sliding of the driving plate (1041), the bearing plate (701) is provided with a containing groove (704) for containing the lower die (3), and the lower die (3) is installed in the containing groove (704).

7. The inner buckle injection mold facilitating demolding according to claim 6, characterized in that: The auxiliary guide rod (9) is provided between the bottom plate (703) and the bearing plate (701), the auxiliary guide rod (9) penetrates the driving plate (1041) to limit and guide the driving plate (1041), and the auxiliary guide rod (9) is provided with a second spring (11) connected with the driving plate (1041) or the bearing plate (701) at two ends.

8. The inner buckle injection mold facilitating demolding according to claim 6, characterized in that: The bottom plate (703) is provided with an auxiliary hole (12), and the auxiliary hole (12) is used for containing the output end of the power structure and enabling the output end of the power structure to act on the driving plate (1041).

9. The inner buckle injection mold facilitating demolding according to claim 4, characterized in that: The let go of the rod (1011) and the limiting rod (1012) are detachably connected, or the let go of the rod (1011) and the limiting rod (1012) are telescopically connected.

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