CN214820415U

CN214820415U - Injection mold of product with side direction concave part

Info

Publication number: CN214820415U
Application number: CN202120627497.5U
Authority: CN
Inventors: 张团员; 庄惠凤
Original assignee: Xiamen Surini Precision Mould Co ltd
Current assignee: Chaori Xiamen Technology Co ltd
Priority date: 2021-03-26
Filing date: 2021-03-26
Publication date: 2021-11-23
Anticipated expiration: 2031-03-26

Abstract

The utility model provides an injection mold of product with side direction inner concave part, which comprises a front mold component, a first rear front mold component, a second rear mold component, a mold core and an opening forming component, wherein the mold core comprises a front mold core arranged on the front mold component and a rear mold core arranged on the first rear mold component, and the front mold core and the rear mold core jointly enclose to form a product cavity in a mold closing state; the concave part forming component is provided with a rear sliding block core for forming the concave part, the first rear mould component and the rear mould core are provided with rear inclined slideways which penetrate through to the product cavity, and the rear sliding block core is assembled in the rear inclined slideways in a sliding manner and is in transmission connection with the second rear mould component; and the mold closing or opening between the first rear mold component and the second rear mold component drives the rear slide block core to switch between the in-place position inserted into the product cavity and the dislocation position separated from the product cavity. The injection molding of the injection product with the lateral concave part can be well realized, the mold is simple in structure, and the demolding qualification rate is high.

Description

Injection mold of product with side direction concave part

Technical Field

The utility model relates to an injection mold field, concretely relates to injection mold of product with concave part in side direction.

Background

An injection mold is a tool for producing plastic products and also a tool for giving the plastic products complete structure and precise dimensions. Injection molding by means of an injection mold is a processing method used in mass production of some parts having complicated shapes. The method comprises the specific steps of injecting heated and melted plastic into a mold cavity from an injection molding machine at high pressure, and cooling and solidifying to obtain a formed product.

As shown in fig. 1(a) and 1(b), an injection molded product 100 with an inclined handle has an inclined front end wall and a recess 104 provided on an inner wall of the front end wall; because the opening 101 is the slope setting, when forming this product through moulding plastics, the structure that current injection mold realized is comparatively complicated, and the drawing of patterns qualification rate is on the low side. Therefore, further improvements are needed.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides an injection mold of product with concave part in side direction, the above-mentioned problem of improvement that can be fine.

In order to achieve the above purpose, the utility model provides a technical scheme as follows:

an injection mold for a product with a laterally recessed portion, the product for injection molding having an inclined front end wall and a recessed portion provided on an inner wall of the front end wall; the injection mold comprises a mold body, and a mold core and a concave part forming assembly which are arranged in the mold body, wherein the mold body comprises a front mold assembly, a first rear mold assembly and a second rear mold assembly which are sequentially arranged from front to back and can move relatively, the mold core comprises a front mold core arranged on the front mold assembly and a rear mold core arranged on the first rear mold assembly, and the front mold core and the rear mold core jointly enclose to form a product cavity in a mold closing state;

the concave part forming assembly is provided with a rear sliding block core for forming the concave part, the first rear mould assembly and the rear mould core are provided with rear inclined slideways which penetrate through to the product cavity, and the rear sliding block core is assembled in the rear inclined slideways in a sliding manner and is in transmission connection with the second rear mould assembly; and the mold closing or opening between the first rear mold component and the second rear mold component drives the rear slide block core to switch between a position in which the rear slide block core is inserted into the product cavity and a position out of position in which the rear slide block core is separated from the product cavity.

Furthermore, the concave part forming assembly further comprises a rear inclined guide block, the rear inclined guide block is fixedly arranged on the second rear die assembly, an inclined guide groove is formed in the rear slider core, and the rear inclined guide block is inserted into the inclined guide groove of the rear slider core to be matched with the inclined guide of the rear slider core.

Furthermore, the first rear die assembly is also provided with a limiting structure which corresponds to the front end and the rear end of the front sliding block core respectively.

Furthermore, the product is also provided with an inner buckle, the injection mold also comprises an inclined ejector rod for forming the inner buckle, the second rear mold assembly is provided with an ejector pin driving plate capable of moving back and forth, a fixing plate is fixed on the ejector pin driving plate, a lateral sliding groove perpendicular to the front and rear direction is formed in the fixing plate, and the rear end of the inclined ejector rod is hinged in the lateral sliding groove of the fixing plate and can slide in the lateral sliding groove; the front end of the inner clamping structure is provided with an inner clamping buckle forming structure for forming an inner clamping buckle and respectively penetrates through the first rear die assembly and the rear die core to the product cavity.

Furthermore, the product is also provided with an outer buckle, the injection mold also comprises an outer buckle forming assembly for forming the outer buckle, the outer buckle forming assembly comprises an oblique guide sliding block and a middle oblique guide block, the oblique guide sliding block is provided with an outer buckle forming structure for forming the outer buckle and can be assembled on the first rear mold assembly in a lateral sliding mode, and the middle oblique guide block is fixed on the front mold assembly and forms oblique guide fit with the oblique guide sliding block; the mold closing or opening of the front mold assembly and the first rear mold assembly drives the outer buckle forming structure on the inclined guide sliding block to switch between an in-place position where the outer buckle forming structure is inserted into a product cavity and a dislocation position where the outer buckle forming structure is separated from the product cavity.

Furthermore, a limiting buckle machine is arranged between the front die assembly and the first rear die assembly and between the first rear die assembly and the second rear die assembly, when the assembly located at the front end moves forwards to a dislocated position, the assembly at the rear end can be limited by the limiting buckle machine, and the assembly at the front end continuously moves forwards to drive the assembly at the rear end to move forwards synchronously through the limiting buckle machine.

Through the utility model provides a technical scheme has following beneficial effect:

the injection mold provided by the scheme can well realize injection molding of injection products with the lateral concave parts as shown in fig. 1(a) and fig. 1(b), and is simple in structure and high in demolding qualification rate.

Drawings

FIG. 1(a) is a schematic structural view of an injection molded product;

FIG. 1(b) is a schematic view of another angle of the product shown in FIG. 1 (a);

FIG. 2 is a schematic perspective view of an injection mold according to an embodiment;

FIG. 3 is a side view of one side of an injection mold according to an embodiment;

FIG. 4(a) is a schematic structural view of a front mold part of an injection mold in an embodiment;

FIG. 4(b) is a schematic structural view of a rear mold part of an injection mold in an embodiment;

FIG. 5 is a side view of the injection mold in a closed state in the embodiment;

FIG. 6 is a sectional view of the injection mold in a closed state in the embodiment; at this time, injection molding is not carried out;

FIG. 7 is a sectional view showing the injection mold according to the embodiment at the time of injection molding of a product;

FIG. 8 is a first side view of the injection mold of the embodiment during mold opening; in which the internal structure is hidden;

FIG. 9 is a cross-sectional view of the state of FIG. 8;

FIG. 10 is a second side view of the injection mold of the embodiment during mold opening; in which the internal structure is hidden;

FIG. 11 is a cross-sectional view of the state of FIG. 10;

FIG. 12 is a side view III of the injection mold of the embodiment shown in the mold opening process; in which the internal structure is hidden;

FIG. 13 is a cross-sectional view of the condition of FIG. 12;

fig. 14 is a sectional view showing the injection mold in the embodiment when ejecting the product.

Detailed Description

To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

Meanwhile, the directions of front, rear, left, right, and the like referred to in the present embodiment are only used as a reference for one direction, and do not represent directions in actual use.

The present invention will now be further described with reference to the accompanying drawings and detailed description.

The present embodiment provides an injection mold for a product with a laterally recessed portion, which is used for injection molding of an injection molded product 100 shown in fig. 1(a) and 1 (b); referring to fig. 2 to 14, the injection mold comprises a mold body, and a mold core and an opening forming assembly which are arranged in the mold body, wherein the mold body comprises a first front mold assembly 11, a second front mold assembly 12 and a rear mold assembly which are sequentially arranged from front to back and can move relatively, the first front mold assembly 11 and the second front mold assembly 12 form the front mold assembly, the mold core comprises a front mold core 21 arranged on the second front mold assembly 12 and a rear mold core 22 arranged on the rear mold assembly, and in a mold closing state, the front mold core 21 and the rear mold core 22 jointly enclose to form a product cavity 201.

The opening forming assembly has a front slider core 31 for forming an opening 101 of the product 100 of fig. 1(a) and 1 (b); the second front mold component 12 and the front mold core 21 are provided with a front inclined slideway (not marked) penetrating to the product cavity 201, and the front slider core 31 is slidably assembled in the front inclined slideway and forms transmission connection with the first front mold component 11; the closing or opening of the first front mold assembly 11 and the second front mold assembly 12 switches the front slider core 31 between a position inserted into the product cavity 201 (as shown in fig. 6) and a position disengaged from the product cavity 201 (as shown in fig. 9). Namely, when the first front mold assembly 11 is close to the second front mold assembly 12 for mold closing, the front slide block core 31 is driven to be inserted into the product cavity 201 to reach the in-place position, and at the moment, the injection molding operation can be carried out. When the first front mold assembly 11 is far away from the second front mold assembly 12 to open the mold, the front slider core 31 is driven to be separated from the product cavity 201 to reach a dislocation position, core pulling is realized, and the injection product 100 forms the inclined opening 101 after core pulling. Thereafter, the front mold assembly (i.e., first front mold assembly 11 and second front mold assembly 12) is moved away from the rear mold assembly, effecting separation of front mold core 21 and rear mold core 22.

The injection mold that this scheme provided, realization that can be fine has the injection moulding of injection moulding product 100 of slope opening 101, and mould simple structure, and the slope of preceding slider core 31 is loosed core and is made the drawing of patterns qualification rate high.

Specifically, the specific structure of the front slider core 31 and the first front mold assembly 11 forming the transmission connection is as follows: the opening forming assembly further comprises a front inclined guide block 32, the front inclined guide block 32 is fixedly arranged on the first front mold assembly 11, an inclined guide groove (not marked) is formed in the front slider core 31, and the front inclined guide block 32 is inserted into the inclined guide groove of the front slider core 31 to be matched with the inclined guide of the front slider core 31. When the first front mold assembly 11 approaches the second front mold assembly 12 for mold closing, the approach of the first front mold assembly 11 drives the front slide core 31 to be inserted into the product cavity through the front inclined guide block 32 to reach the position of the position. When the first front mold assembly 11 moves forward relative to the second front mold assembly 12, the approach of the first front mold assembly 11 drives the front slide core 31 to be drawn out of the product cavity 201 through the front inclined guide block 32 to reach the dislocated position. Therefore, the transmission structure of the first front mold assembly 11 and the front slider core 31 is simple, easy to realize and stable in transmission. Of course, in other embodiments, other transmission means may be used instead.

Although, the sliding of the front slider core 31 is directly controlled by the first front mold assembly 11, and the position of the front slider core 31 can be accurately controlled; however, in order to make the position of the front slider core 31 more accurate and have a limiting effect, in this embodiment, the second front mold assembly 12 is further provided with a limiting structure corresponding to the front end and the rear end of the front slider core 31, and the limiting structure plays an auxiliary role to prevent the front slider core 31 from being excessively displaced to generate abrasion. Specifically, the limiting structure corresponding to the front end of the front slider core 31 is: a front abutting block 33 transversely extending to the front end opening of the front inclined slideway is fixed on the second front mold component 12, and the front sliding block core 31 stops when sliding forwards to perform core pulling until abutting against the front abutting block 33, and at the moment, the dislocation position is reached. The limiting structure corresponding to the rear end of the front slider core 31 is a collision step (not shown) formed on the front mold core 21, and the front slider core 31 stops when sliding backwards and being inserted to abut against the collision step, and reaches the in-place position at the moment. The limiting structure is easy to realize and simple to assemble. Of course, in other embodiments, the above-mentioned limiting structure is not limited thereto.

Further, in the present embodiment, as shown in fig. 1(a) and 1(b), the front end wall of the product 100 further has a through hole 102 and a groove 103 (e.g., a groove having a trademark pattern) at the periphery of the opening 101, and the front slider core 31 specifically includes a front slider body, an opening forming core, a through hole forming core, and a groove forming core; the front sliding block body is assembled in the front inclined slideway in a sliding mode, and the opening forming core, the through hole forming core and the groove forming core are fixed at the rear end portion of the front sliding block body and extend towards the direction of the product cavity 201. The single front sliding block core 31 can meet the forming of the opening, the through hole and the groove, and the structure is simple. Of course, in other embodiments, the forming structure of the through holes and the grooves can be realized by other independent structures, but the structure is more complicated due to the arrangement.

Further, in the present embodiment, as shown in fig. 1(a) and 1(b), the inner wall surface of the product 100 further has a recess 104 located at the periphery of the opening 101, the rear mold assembly includes a first rear mold assembly 13 located at the rear end of the second front mold assembly 12 and a second rear mold assembly 14 located at the rear end of the first rear mold assembly 13, and the rear mold core 22 is disposed on the first rear mold assembly 13; the injection mold further comprises a concave part forming assembly, the concave part forming assembly is provided with a rear sliding block core 41 for forming the concave part 104, rear inclined slideways (not marked) penetrating to the product cavity 201 are formed in the first rear mold assembly 13 and the rear mold core 22, and the rear sliding block core 41 is slidably assembled in the rear inclined slideways and forms transmission connection with the second rear mold assembly 14; the closing or opening of the first rear mold assembly 13 and the second rear mold assembly 14 causes the rear slider core 41 to switch between a seated position inserted into the product cavity 201 (as shown in fig. 6) and a released position released from the product cavity 201 (as shown in fig. 13). Namely, when the first rear mold assembly 13 is close to the second rear mold assembly 14 for mold closing, the rear slider core 41 is driven to be inserted into the product cavity 201 to reach the in-place position, and at this time, the injection molding operation can be performed. When the first rear mold assembly 13 is far away from the second rear mold assembly 14 to open the mold, the rear slider core 41 is driven to be separated from the product cavity 201 to reach a dislocation position, core pulling is realized, and the inner wall of the injection product 100 after core pulling forms the concave part 104. Meanwhile, the inclined core pulling of the rear slider core 41 enables the demolding qualification rate to be high.

An opening forming component for forming the opening 101 is arranged in front and is controlled by the relative action between the first front mold component 11 and the second front mold component 12; the recess forming assembly for forming the inner wall recess 104 is arranged at the rear, and is controlled by the relative motion between the first rear mold assembly 13 and the second rear mold assembly 14; the two form a bidirectional inclined core pulling combination; the structure is reasonable in layout, the mutual interference is avoided, and the action is stable. Of course, in other embodiments, the configuration and placement of the recess-forming assembly are not limited thereto.

Of course, in other embodiments, if the product 100 does not have the recess 104 structure of the inner wall, the mold may not need to employ a recess forming assembly, nor the rear mold assembly need to be disassembled into the separable first rear mold assembly 13 and second rear mold assembly 14. Alternatively, if the product 100 has a recess of an inner wall, the structure of the opening 101, the through hole 102 and the groove 103 may not be provided, and an opening forming assembly may not be used, and the front mold assembly may not be disassembled into the first front mold assembly 11 and the second front mold assembly 12 which are separable, that is, the first front mold assembly 11 and the second front mold assembly 12 may be integrally formed. When the mold is opened, the front mold assembly is directly driven to move forward, so that the front mold core 21 is separated.

Further, in this embodiment, the concave portion forming assembly further includes a rear inclined guide block 42, the rear inclined guide block 42 is fixedly disposed on the second rear mold assembly 14, an inclined guide groove (not shown) is formed on the rear slider core 41, and the rear inclined guide block 42 is inserted into the inclined guide groove of the rear slider core 41 to realize an inclined guide fit with the rear slider core 41. When the first rear mold assembly 13 moves close to or away from the second rear mold assembly 14, the rear slider core 41 and the rear inclined guide block 42 slide relatively, and the rear slider core 41 is driven by the inclined guide structure to slide in the rear inclined slide way, so that switching between a position in which the rear inclined guide block is located (as shown in fig. 6) and a position out of position (as shown in fig. 13) is finally realized. Thus, the transmission structure of the second rear mold assembly 14 and the rear slider core 41 is simple, easy to implement, and stable in transmission. Of course, in other embodiments, other transmission means may be used instead.

More specifically, as shown in fig. 1(a) and fig. 1(b), the product 100 further has an inner buckle 105, the injection mold further includes an inclined push rod 51 for forming the inner buckle 105, the second rear mold assembly specifically includes a base 142, a rear mold plate 141 fixed on the base, and an ejector pin drive plate 143 disposed in the base 142 and capable of moving forward and backward, a fixing plate 52 is fixed on the ejector pin drive plate 143, a lateral sliding slot (not shown) perpendicular to the front-rear direction is formed in the fixing plate 52, and a rear end of the inclined push rod 51 is hinged in the lateral sliding slot of the fixing plate 52 and capable of sliding in the lateral sliding slot; the front end of the inner clamping buckle forming structure is provided with an inner clamping buckle forming structure for forming the inner clamping buckle 105, and the inner clamping buckle forming structure respectively passes through the first rear mold assembly 13 and the rear mold core 22 to the product cavity 201. When the mold is removed from the mold at this position, as shown in fig. 13 and 14, the pin driving plate 143 is driven by an external driving device to move forward, the pin driving plate 143 moves forward and simultaneously drives the inclined push rod 51 to eject upward, the upward ejection movement of the inclined push rod 51 ejects the product 100 out of the rear mold core, and the mold is also removed. Simple structure and ingenious design. Of course, in other embodiments, the structure of the molded inner snap 105 is not limited thereto.

More specifically, the product 100 further has an outer buckle 106, and the injection mold further includes an outer buckle forming assembly for forming the outer buckle 106, the outer buckle forming assembly includes an oblique guide slider 61 and a middle oblique guide block 62, the oblique guide slider 61 has an outer buckle forming structure for forming the outer buckle 106, as shown in fig. 6, the outer buckle forming structure may be directly formed on the oblique guide slider 61 or formed on an insert 63, and the insert 63 is connected to the oblique guide slider 61. The inclined guide sliding block 61 can be assembled on the first rear die assembly 13 in a laterally sliding manner, and the middle inclined guide block 62 is fixed on the second front die assembly 12 and forms inclined guide fit with the inclined guide sliding block 61; the mold closing or opening of the second front mold assembly 12 and the first rear mold assembly 13 drives the outer buckle forming structure on the inclined guide sliding block 61 to switch between a position (shown in fig. 6) where the outer buckle forming structure is inserted into the product cavity 201 and a position (shown in fig. 11) where the outer buckle forming structure is separated from the product cavity 201. Namely, when the second front mold assembly 12 is close to the first rear mold assembly 13, the intermediate oblique guide block 62 drives the oblique guide slide block 61 to be close to the product cavity 201, and further drives the external buckle forming structure to be inserted into the product cavity 201 to reach the in-place position; when the second front mold assembly 12 is far away from the first rear mold assembly 13, the oblique guide block 62 in the middle drives the oblique guide slide block 61 to be far away from the product cavity 201, and then the outer buckle forming structure is driven to be separated from the product cavity 201 to reach a dislocation position, so that core pulling is realized. Simple structure and easy realization. Of course, in other embodiments, the structure of the outer snap molding member is not limited thereto.

And limiting button machines are arranged between the first front mold assembly 11 and the second front mold assembly 12, between the second front mold assembly 12 and the first rear mold assembly 13 and between the first rear mold assembly 13 and the second rear mold assembly 14, when the assembly at the front end moves forwards to a dislocation position, the assembly at the rear end can be limited by the limiting button machines, and the assembly at the front end continuously moves forwards to drive the assembly at the rear end to synchronously move forwards through the limiting button machines.

Specifically, the two limit button machines are respectively a first limit button machine and a second limit button machine; the first limit button machine is set as a short-distance limit and is suitable for being arranged between the first front mold assembly 11 and the second front mold assembly 12 and between the first rear mold assembly 13 and the second rear mold assembly 14; the second limit button machine is set to a long-distance limit suitable for being disposed between the second front mold assembly 12 and the first rear mold assembly 13.

More specifically, the first limit button machine is realized by adopting a limit screw. Such as between the first front mold assembly 11 and the second front mold assembly 12, a front-to-rear straight distance defining the switching of the front slider core 31 between the seated position and the unseated position is L1, a limit slot hole (defined as a first limit slot hole 72) is formed on the second front mold assembly 12, the limit screw (defined as a first limit screw 71) is accommodated in the first limit slot hole 72, and passes through the second front mold assembly 12 to be fixed on the first front mold assembly 11, in the mold clamping state, the nut 711 of the first limit screw 71 has a distance L1 (as shown in FIG. 5) with the bottom of the first limit slot 72, when the first front mold assembly 11 is moved to a distance L1 away from the second front mold assembly 12, the front slider core 31 reaches the unseated position, meanwhile, the nut 711 of the first limit screw 71 is just abutted against the bottom of the first limit slot 72 (as shown in fig. 8); the continuous forward movement of the first front mold assembly 11 drives the second front mold assembly 12 to move forward synchronously through the abutting fit of the nut 711 of the first limit screw 71 and the first limit slot 72. Therefore, the second front mold assembly 12 can be driven to synchronously move forwards through the simple limiting structure, and the matching is accurate and the structure is simple.

And as provided between the first rear mold assembly 13 and the second rear mold assembly 14, the front-rear straight distance defining the switching of the rear slider core 41 between the seated position and the unseated position is L2, a limit slot hole (defined as a second limit slot hole 74) is formed on the first rear mold assembly 13, the limit screw (defined as a second limit screw 73) is accommodated in the second limit slot hole 74, and passes through the first rear mold assembly 13 to be fixed on the second rear mold assembly 14, in the mold clamping state, the nut 731 of the second limit screw 73 has a distance L2 (as shown in FIG. 5) from the bottom of the second limit slot 74, when the first rear mold assembly 13 is moved away from the second rear mold assembly 14 to a distance L2, the rear slider core 41 reaches the unseated position, meanwhile, the nut 731 of the second limit screw 73 just abuts against the bottom of the second limit slot 74 (as shown in fig. 12); and realizing the limit. Therefore, the first rear die assembly 13 can be limited to move forwards continuously through the simple limiting structure, and the matching is accurate and the structure is simple.

The mold opening distance of the second front mold assembly 12 and the first rear mold assembly 13 is defined as L3, the second limit button machine is implemented by using a connecting rod 75, specifically, a limit nail 76 is respectively fixed on the second front mold assembly 12 and the first rear mold assembly 13, the axial extending direction of the connecting rod 75 is the front-back direction, and two limit long holes 751 are formed along the axial extending direction of the connecting rod 75, the limit nails 76 on the second front mold assembly 12 and the first rear mold assembly 13 are respectively inserted into the two limit long holes 751, when the second front mold assembly 12 moves forward for an L3 distance relative to the first rear mold assembly 13, the mold opening between the second front mold assembly 12 and the first rear mold assembly 13 is completed, at this time, the two limit nails 76 respectively abut against the outer ends of the two limit long holes 751 (as shown in forward movement fig. 10), at this time, the second front mold assembly 12 can continuously drive the first rear mold assembly 13 to move synchronously. So, just can drive first back mould subassembly 13 synchronous antedisplacement through simple limit structure, the cooperation is accurate, simple structure.

Of course, in other embodiments, the structure of the limit button machine is not limited thereto.

Still further, in this embodiment, the mould still includes the order machine of detaining, the order machine of detaining includes fixing base 81, preceding gag lever post 82 and back gag lever post 83, fixing base 81 is fixed to be set up on second front mould subassembly 12 to set up two sets of holes of stepping down (not shown) that link up around, the front end of preceding gag lever post 82 is fixed in on first front mould subassembly 11, the rear end of back gag lever post 83 is fixed in first back mould subassembly 13, under the matched molds state, the front end of back gag lever post 83 is worn to locate one of them group of holes of stepping down of fixing base 81 and is fixed with fixing base 81 looks lock joint, the rear end of preceding gag lever post 82 passes another group of holes of fixing base 81 and extends L1 distance backward, the rear end of preceding gag lever post 81 is formed with the trigger part that is used for triggering to remove back gag lever post 83 and fixing base 81 looks lock joint.

Specifically, referring to fig. 2 and 3, the sequential fastening machine further includes a sliding latch 85 and an elastic member 84 disposed in the fixing base 81, the sliding latch 85 is assembled in the fixing base 81 in a laterally slidable manner (e.g., in a left-right slidable manner as shown in fig. 3), two end portions defining a lateral sliding direction of the sliding latch 85 are a first end (a left end in fig. 3) and a second end (a right end in fig. 3), a middle portion of the sliding latch 85 is provided with an allowance for the front limiting rod 82 to pass through, the elastic member 84 is disposed between the fixing base 81 and the first end of the sliding latch 85 and applies an elastic force to the sliding latch 85 toward the second end of the sliding latch 85, a front end of the rear limiting rod 83 is provided with a latch head 831, and is latched to the second end of the sliding latch 85 through the latch head 831; the triggering portion of the front limiting rod 82 is a convex portion 821 which protrudes and extends towards the first end direction of the sliding block 85, when the first front mold assembly 11 moves forward by a distance of L1, the convex portion 821 of the first front limiting rod 82 enters the receding opening of the sliding block 85, and pushes the sliding block 85 to overcome the elastic force of the elastic member 84 and slide towards the first end direction, so that the second end of the sliding block 85 is separated from the clamping head 831 of the rear limiting rod 83, and the unlocking of the second front mold assembly 12 and the first rear mold assembly 13 is realized. The structure design is simple and easy to realize. Of course, in other embodiments, the structure of the sequential trip is not limited thereto.

The concrete demoulding step of product in the injection mold that this scheme provided is as follows:

in the first step, as shown in fig. 7, after the injection molding is completed, the first front mold assembly 11 is driven to move forward, the forward movement of the first front mold assembly 11 relative to the second front mold assembly 12 can realize the core pulling of the front slider core 31, and after the forward movement is performed by a distance of L1, the front slider core 31 completes the core pulling and reaches the dislocated position, as shown in fig. 8 and 9. At this time, the nut 711 of the first limit screw 71 just abuts against the bottom of the first limit slot 72; and the rear end of the front limiting rod 82 enters the fixed seat 81 and triggers unlocking (i.e. releasing the fastening of the rear limiting rod 83 and the fixed seat 81).

The second step is that: the first front mold assembly 11 moves forward continuously, and the nut 711 of the first limit screw 71 is in butt fit with the first limit slot hole 72 to drive the second front mold assembly 12 to move forward synchronously; the front mold core 21 begins to be separated, and the surface of the injection molding product is exposed; the outer snap forming assembly also begins to dislocate; when the front end of the rear end of the front end of; at this time, the mold opening operation of the second front mold assembly 12 is completed, as shown in fig. 10 and 11.

The third step: the first front mold assembly 11 and the second front mold assembly 12 move forwards continuously, and the sequential button machine drives the first rear mold assembly 13 to move forwards synchronously; the first rear mold assembly 13 starts to be separated, in the process, the rear slider core 41 performs core pulling, when the first rear mold assembly 13 moves forwards by L2, the rear slider core 41 completes core pulling, and meanwhile, the nut 731 of the second limit screw 73 just abuts against the bottom of the second limit slot 74; the limit is realized as shown in fig. 12 and 13.

Specifically, in this process, since the inclined push rod 51 is always limited, the inclined push rod 51 and the ejector pin driving plate 143 are driven to synchronously move forward by the distance L3 in the forward movement process of the first rear mold assembly 13.

The fourth step: the thimble driving plate 143 is driven by an external driving device to move forward, the thimble driving plate 143 moves forward and drives the inclined ejector rod 51 to eject upward, the inclined ejector rod 51 ejects upward to complete dislocation, and the product 100 is ejected out of the rear mold core to complete demolding of the product 100, as shown in fig. 14.

The injection molding of above-mentioned product structure has been accomplished to this mould fine, simple structure, design benefit.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. An injection mold for a product with a laterally recessed portion, the product for injection molding having an inclined front end wall and a recessed portion provided on an inner wall of the front end wall; the method is characterized in that: the die comprises a die body, a die core and a concave part forming assembly, wherein the die core and the concave part forming assembly are arranged in the die body, the die body comprises a front die assembly, a first rear die assembly and a second rear die assembly which are sequentially arranged from front to back and can relatively move, the die core comprises a front die core arranged on the front die assembly and a rear die core arranged on the first rear die assembly, and the front die core and the rear die core jointly enclose to form a product cavity in a die closing state;

2. An injection mold for a product with a laterally recessed portion according to claim 1, wherein: the concave part forming assembly further comprises a rear inclined guide block, the rear inclined guide block is fixedly arranged on the second rear die assembly, an inclined guide groove is formed in the rear slider core, and the rear inclined guide block is inserted into the inclined guide groove of the rear slider core to be matched with the inclined guide of the rear slider core.

3. An injection mold for a product with a laterally recessed portion according to claim 2, wherein: and the first rear die assembly is also provided with a limiting structure which corresponds to the front end and the rear end of the front sliding block core respectively.

4. An injection mold for a product with a laterally recessed portion according to claim 1, wherein: the product is also provided with an inner buckle, the injection mold further comprises an inclined ejector rod for forming the inner buckle, the second rear mold assembly is provided with an ejector pin driving plate capable of moving back and forth, a fixing plate is fixed on the ejector pin driving plate, a lateral sliding groove perpendicular to the front and rear direction is formed in the fixing plate, and the rear end of the inclined ejector rod is hinged in the lateral sliding groove of the fixing plate and can slide in the lateral sliding groove; the front end of the inner clamping structure is provided with an inner clamping buckle forming structure for forming an inner clamping buckle and respectively penetrates through the first rear die assembly and the rear die core to the product cavity.

5. An injection mold for a product with a laterally recessed portion according to claim 1, wherein: the product is also provided with an outer buckle, the injection mold further comprises an outer buckle forming assembly for forming the outer buckle, the outer buckle forming assembly comprises an oblique guide sliding block and a middle oblique guide block, the oblique guide sliding block is provided with an outer buckle forming structure for forming the outer buckle and can be assembled on the first rear mold assembly in a lateral sliding mode, and the middle oblique guide block is fixed on the front mold assembly and forms oblique guide fit with the oblique guide sliding block; the mold closing or opening of the front mold assembly and the first rear mold assembly drives the outer buckle forming structure on the inclined guide sliding block to switch between an in-place position where the outer buckle forming structure is inserted into a product cavity and a dislocation position where the outer buckle forming structure is separated from the product cavity.

6. An injection mold for a product with a laterally recessed portion according to claim 1, wherein: and when the assembly at the front end moves forwards to a dislocation position, the assembly at the rear end can be limited by the limiting button machine, and the assembly at the front end continuously moves forwards by the limiting button machine to drive the assembly at the rear end to move forwards synchronously.