High-precision insert positioning injection mold

Abstract

The utility model discloses a high-precision insert positioning injection mold, which relates to the technical field of molds, and comprises an upper mold and a lower mold, the upper mold is provided with an upper mold core, the lower mold is provided with a lower mold core, and the upper mold and the lower mold are matched in a butt joint manner, so that the upper mold core and the lower mold core are mutually butted to form a mold cavity for forming a product. An assembling groove is formed along the end face of the upper mold core, and an insert assembly is detachably connected in the assembling groove; the insert assembly comprises a first slide, a first insert, an elastic element, a fixing block and an abutting block, a first sliding groove is formed in one side of the end face of the first slide, a first end and a second end are formed at the two ends of the first insert respectively, the first end is embedded into the first sliding groove, the second end extends out of the outer side of the first sliding groove, and the elastic element is arranged on the first sliding groove. The second end is provided with a product profiling structure, and the upper mold core is provided with a channel which corresponds to the second end and is communicated with the assembling groove; the problem that a traditional mold insert is not accurate in positioning is effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a mould technical field, concretely is a high-precision insert positioning injection mould. BACKGROUND

[0002] In modern manufacturing industry, injection molding process is widely applied because it can efficiently and massively produce plastic products with complex shape and high precision. As the core component of injection molding process, the structure design and performance of injection mold directly affect the quality, production efficiency and production cost of products.

[0003] With the continuous expansion of the application of plastic products in various fields, the design of products is increasingly diversified and refined, which puts forward higher requirements on the flexibility and functionality of injection mold. Although the traditional injection mold can meet some basic molding requirements in the design and manufacturing process, it exposes defects in positioning accuracy when facing products with fine structure or high precision requirements.

[0004] For example, when molding some products with micro features, thin-walled structure or close-fit size requirements, especially when forming a specific undercut structure or side hole structure inside the product, slight deviation in positioning between the core and cavity of the mold, as well as between the insert and mold core, will cause serious quality problems such as flash, material shortage and size out-of-tolerance in the product.

[0005] Some existing mold positioning methods, such as simple mechanical cooperation and conventional guide pillar and guide sleeve structure, are difficult to continuously ensure the accurate relative position relationship between the insert and mold core in the long-term production process due to factors such as mold wear, thermal expansion and contraction, and repeated impact of injection pressure. This unstable positioning accuracy not only increases the product scrap rate, increases production cost, but also reduces production efficiency, because the mold needs to be frequently debugged and maintained.

[0006] Therefore, it is necessary to propose an improved technical solution to solve the above problems. UTILITY MODEL CONTENT

[0007] The utility model aims at providing a technical solution to solve the above problems.

[0008] A high-precision insert positioning injection mold, comprising an upper mold and a lower mold, the upper mold has an upper mold core, the lower mold has a lower mold core, the upper mold and the lower mold are butt-jointed to form a mold cavity for molding products, a mounting groove is formed along the end face of the upper mold core, and an insert assembly is detachably connected in the mounting groove.

[0009] The insert assembly comprises a first row, a first insert, an elastic element, a fixing block and an abutting block, a first sliding groove is formed on the end face of the first row, the two ends of the first insert are respectively formed into a first end and a second end, the first end is embedded into the first sliding groove, the second end extends out of the first sliding groove, and a product profiling structure is arranged on the second end, the upper die core is provided with a channel corresponding to the second end and communicating with the assembly groove, the second end is connected with the mold cavity through the channel, one end of the abutting block is located on the side of the first row away from the first insert and is slidably connected with the first row, a second sliding groove communicating with the assembly groove is formed on one side of the upper die core, the other end of the abutting block is slidably extended out of the upper die core through the second sliding groove and is connected to the power output end of the external power element, the elastic element is located on the same side of the first end to elastically abut the inner wall of the first sliding groove, and the fixing block is located at the opening position of the assembly groove to limit the first row, the first insert, the elastic element and the abutting block in the assembly groove.

[0010] As a further scheme of the present application, the assembly groove comprises a first groove and a second groove arranged in sequence from top to bottom, the first groove, the second groove and the second sliding groove are sequentially communicated, a threaded groove is arranged on the first groove, the fixing block is provided with a matching mounting hole, and the first row, the first insert, the elastic element and the abutting block are located in the second groove.

[0011] As a further scheme of the present application, the abutting block is obliquely matched with the first row at the matching end, and a T-shaped sliding rail structure is arranged on the oblique surface of the abutting block, and a T-shaped sliding groove is arranged on the oblique surface of the first row and slidably matched with the T-shaped sliding rail structure.

[0012] As a further scheme of the present application, the T-shaped sliding groove is at least partially communicated with the first sliding groove, wherein the T-shaped sliding rail structure and the first end of the first insert are matched in an upper and lower interval at the portion where the T-shaped sliding groove and the first sliding groove coincide.

[0013] As a further scheme of the present application, the inner side of the first sliding groove is bent to form an abutting portion, and the first end is limited and matched with the abutting portion.

[0014] As a further scheme of the present application, the first row is provided with a mounting groove corresponding to the elastic element on the same side of the first end, an abutting wall corresponding to the mounting groove is formed in the assembly groove, one end of the elastic element is arranged in the mounting groove, the other end of the elastic element extends out of the mounting groove and is elastically matched with the abutting wall.

[0015] Compared with the prior art, the present application has the following advantages:

[0016] 1) effectively solve the traditional mold in the face of fine structure products insert positioning problem, through the buffer fine-tuning of elastic element and the abutment block and the accurate control of power element, the first insert can always keep high-precision positioning in the mold cavity, greatly reduce the incidence of quality defects such as product flash, material shortage, size out-of-tolerance caused by positioning deviation, significantly improve the product quality;

[0017] 2) stable positioning accuracy reduces the number of mold debugging and maintenance due to product quality problems, at the same time, the automatic insert action control can better match the injection molding cycle, shorten the molding time, improve the production rhythm, thereby effectively improving the production efficiency.

[0018] The additional aspects and advantages of the present application will be partially given in the following description, some of which will become apparent from the following description, or will be understood by those skilled in the art from the description of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0020] Figure 1 is a structural schematic diagram of the present application;

[0021] Figure 2 is a structural schematic diagram of the insert assembly and the upper mold core of the present application;

[0022] Figure 3 is Figure 2 a structural schematic diagram of the present application removing the fixed block;

[0023] Figure 4 is a structural schematic diagram of the assembly groove of the present application;

[0024] Figure 5 is a local explosion structural schematic diagram of the insert assembly of the present application.

[0025] The reference signs and names in the drawings are as follows:

[0026] 1, upper die; 2, lower die; 3, upper die core; 4, assembly groove; 5, first row; 6, first insert; 7, elastic element; 8, fixed block; 9, abutting block; 10, first sliding groove; 11, first end; 12, second end; 13, product profiling structure; 14, channel; 15, second sliding groove; 16, power element; 17, first slot; 18, second slot; 19, threaded groove; 20, mounting hole; 21, T-shaped sliding rail structure; 22, T-shaped sliding groove; 23, abutting portion; 24, mounting groove; 25, abutting wall. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0028] Please refer to Figures 1-5 In the embodiments of the utility model, a high-precision insert positioning injection mold comprises an upper die 1 and a lower die 2, the upper die 1 has an upper die core 3, the lower die 2 has a lower die core 2, the upper die 1 and the lower die 2 are butted and matched to make the upper die core 3 and the lower die core 2 butt against each other to form a mold cavity for molding a product, an assembly groove 4 is formed along the end face of the upper die core 3, and an insert assembly is detachably connected in the assembly groove 4.

[0029] The insert assembly comprises a first row 5, a first insert 6, an elastic element 7, a fixed block 8 and an abutting block 9, a first sliding groove 10 is formed along one side of the end face of the first row 5, the first insert 6 has a first end 11 and a second end 12 formed at two ends respectively, the first end 11 is embedded into the first sliding groove 10, the second end 12 extends out of the first sliding groove 10, the product profiling structure 13 is arranged on the second end 12, the upper die core 3 is provided with a channel 14 corresponding to the second end 12 and communicating with the assembly groove 4, the second end 12 is butted and matched with the mold cavity through the channel 14, one end of the abutting block 9 is located on the side of the first row 5 away from the first insert 6 and is slidably butted and matched with the first row 5, a second sliding groove 15 communicating with the assembly groove 4 is formed along one side of the upper die core 3, the other end of the abutting block 9 is slidably extended out of the upper die core 3 through the second sliding groove 15 and is connected to the power output end of an externally arranged power element 16, the elastic element 7 is located on the same side of the first end 11 to make the first row 5 and the inner wall of the first sliding groove 10 elastically butted and matched, and the fixed block 8 is located at the opening position of the assembly groove 4 to limit the first row 5, the first insert 6, the elastic element 7 and the abutting block 9 in the assembly groove 4.

[0030] The core insert assembly of the mold is composed of a first row position 5, a first insert 6, an elastic element 7, a fixed block 8 and an abutting block 9, a first sliding groove 10 on one side of the end face of the first row position 5 provides a precise embedding track for the first insert 6, the first end 11 of the first insert 6 is embedded therein, and the positioning accuracy in this direction is ensured, the elastic element 7 (such as a telescopic spring) is cleverly arranged on the same side of the first end 11, the elastic force of the elastic element 7 always keeps the first row position 5 and the inner wall of the first sliding groove 10 in an elastic abutting state, during the processing and manufacturing of the mold, slight size deviation and surface roughness difference will inevitably occur, and there may be certain cumulative error in the assembly link, and under the high-pressure environment of injection molding, the first insert 6 will also bear a huge melt impact force, the elastic element 7 can effectively absorb and compensate the slight displacement change caused by these factors, so that the first insert 6 still maintains a relatively accurate and stable position in the dynamic environment, and positioning deviation caused by external interference is avoided;

[0031] One end of the abutting block 9 forms a slidable abutting relationship with the first row position 5, and the other end thereof is connected with the power output end of an external power element 16 (such as an oil cylinder) through a second sliding groove 15 of the side communicating assembly groove 4 of the upper mold core 3, and a close connection is established, in the opening and closing action of the mold and the molding process of a specific complex structure product, the power element 16 accurately drives the abutting block 9 to move linearly according to the preset program or process requirement, due to the abutting relationship between the abutting block 9 and the first row position 5, the movement is accurately transmitted to the first row position 5 and the first insert 6 connected therewith, so as to realize accurate displacement control of the first insert 6 in the assembly groove 4, for example, for the product molding with internal reverse buckle structure or side hole structure, in the key stage of injection molding, the power element 16 timely pushes the abutting block 9, so that the second end 12 (the product profiling structure 13 thereof) of the first insert 6 accurately extends to a specific position of the mold cavity through the passage 14 of the upper mold core 3, and participates in the molding of the key part of the product; after the molding process is completed, the power element 16 can stably pull the first insert 6 back to the initial position or other predetermined position, so as to prepare for the next injection molding cycle, this design not only realizes accurate control of the complex movement of the insert, but also greatly improves the molding adaptation ability and response speed of the mold to various complex product structures by means of the automatic power transmission and execution system;

[0032] The fixed block 8 is located at the opening key part of the assembly groove 4, and its main function is to firmly limit the first row position 5, the first insert 6, the elastic element 7 and the abutting block 9 in the internal space of the assembly groove 4. During the injection molding process, the plastic melt in the mold cavity will exert a continuous and huge pressure, which may try to extrude or loosen the insert assembly from its original installation position. The fixed block 8 effectively resists the adverse effects of melt pressure by its stable limiting effect, ensuring that the entire insert assembly can still maintain the integrity of the structure and the stability of the position in the extreme stress environment, thereby providing a solid and reliable foundation for the high-precision positioning of the insert. The insert can always maintain its precise positioning state during long-term and high-intensity injection molding production process, without position deviation or component scattering caused by external pressure interference.

[0033] During the construction process of the insert assembly of the mold, the first insert 6 is placed in the assembly groove 4 of the upper mold core 3 during initial installation, with the second end 12 smoothly extending into the corresponding channel 14. At this time, the first end 11 of the first insert 6 is at the predetermined position in the assembly groove 4. Then, the first row position 5 is placed along the assembly groove 4, and the first sliding groove 10 on the end face side is precisely slid into the first end 11 of the first insert 6, thereby achieving the close fitting of the first end 11 in the first sliding groove 10 and completing the stable connection of the first insert 6 and the first row position 5. This step-by-step installation design lays a solid foundation for the precise positioning and stable operation of subsequent inserts in the mold. The fitting of the first sliding groove 10 to the first end 11 not only precisely limits the first insert 6 in the horizontal direction, limiting its left-right and front-back displacement, but also achieves a close fit tolerance between the two.

[0034] In summary, the injection mold effectively solves the problem of inaccurate positioning of inserts in traditional molds when facing products with fine structures. Through the buffer adjustment of the elastic element 7 and the precise control of the abutting block 9 and the power element 16, the first insert 6 can always maintain high-precision positioning in the mold cavity, greatly reducing the occurrence of quality defects such as product flash, material shortage and size out-of-tolerance caused by positioning deviation, and significantly improving product quality. Stable positioning accuracy reduces the number of mold debugging and maintenance due to product quality problems. At the same time, automatic insert action control can better match the injection molding cycle, shorten the molding time, improve the production rhythm, and thus effectively improve the production efficiency.

[0035] The assembling groove 4 is sequentially provided with the first groove position 17 and the second groove position 18 from top to bottom, the first groove position 17, the second groove position 18 and the second sliding groove 15 are sequentially communicated, the threaded groove 19 is arranged on the first groove position 17, the fixing block 8 is provided with the matching mounting hole 20, the first row position 5, the first insert 6, the elastic element 7 and the abutting block 9 are located in the second groove position 18.

[0036] The assembling groove 4 is sequentially provided with the first groove position 17 and the second groove position 18 from top to bottom, the first groove position 17, the second groove position 18 and the second sliding groove 15 are sequentially communicated, the threaded groove 19 is arranged on the first groove position 17, the fixing block 8 is provided with the matching mounting hole 20, the first row position 5, the first insert 6, the elastic element 7 and the abutting block 9 are located in the second groove position 18.

[0037] The threaded groove 19 arranged on the first groove position 17 is matched with the mounting hole 20 of the fixing block 8, the mounting of the fixing block 8 is realized through threaded connection, during installation, the fixing block 8 is placed above the first groove position 17, the mounting hole 20 is aligned with the threaded groove 19, then a screw is screwed in, and the fixing block 8 can be firmly fixed, the fixing mode not only is convenient to install, but also can provide sufficient fastening force, and effectively prevents the fixing block 8 from loosening or displacement due to factors such as injection pressure, mechanical vibration and the like during the working process of the mold.

[0038] The abutting block 9 is matched with the first row position 5 in a slope mode, the T-shaped sliding rail structure 21 is arranged on the slope of the abutting block 9, and the first row position 5 is provided with the T-shaped sliding groove 22 which is slidably matched with the T-shaped sliding rail structure 21.

[0039] The abutting block 9 is matched with the first row position 5 in a slope mode, and the linear motion of the abutting block 9 is converted into the compound motion of the first row position 5; when the abutting block 9 is driven by the power element 16 to slide linearly along the second sliding groove 15, due to the existence of the slope, the abutting block 9 generates a slanting thrust to the first row position 5, the thrust can be decomposed into horizontal and vertical components, the horizontal component pushes the first row position 5 to move horizontally in the second groove position 18, thereby driving the second end 12 of the first insert 6 to perform the horizontal extension and retraction motion in the channel 14, so as to realize the forming action on the specific part (such as a side hole, an inverted buckle, etc.) of the product, and the vertical component makes the first row position 5 perform the micro-lifting motion along the slope under the cooperation of the T-shaped sliding groove 22 and the T-shaped sliding rail structure of the abutting block 9; the sliding cooperation between the T-shaped sliding rail structure 21 and the T-shaped sliding groove 22 ensures the stability and accuracy of the first row position 5 in the compound motion process, limits the other degrees of freedom of the first row position 5 except the predetermined motion direction, prevents the shaking or deviation, and ensures the accuracy of the motion track of the first insert 6.

[0040] In the embodiment of the utility model, the T-shaped sliding groove 22 is at least partially communicated with the first sliding groove 10, wherein the T-shaped sliding rail structure 21 and the first end 11 of the first insert 6 are matched in an upper and lower interval mode in the part where the T-shaped sliding groove 22 coincides with the first sliding groove 10.

[0041] In the communication area, the T-shaped sliding rail structure 21 and the first end 11 of the first insert 6 are matched in an upper and lower interval mode, so that the first row position 5 can keep the close embedded relationship between the first sliding groove 10 and the first end 11 of the first insert 6 during the motion process, ensure the stable positioning and accurate motion control of the first insert 6 in the horizontal direction, and realize the compound motion (the combined motion in the horizontal and vertical directions) of the first row position 5 in the slope direction by means of the cooperation between the T-shaped sliding groove 22 and the T-shaped sliding rail structure; when the abutting block 9 pushes the first row position 5, the first row position 5 moves along the limited path of the T-shaped sliding groove 22 and the first sliding groove 10, the T-shaped sliding rail structure 21 slides in the T-shaped sliding groove 22, and the first end 11 of the first insert 6 is relatively stably embedded in the first sliding groove 10, thereby ensuring the coherence and coordination of the overall motion; the design makes the components work cooperatively in the limited space, fully play their respective functions, and improve the compactness and functionality of the mold structure.

[0042] In the embodiment of the utility model, the inner side of the first sliding groove 10 is bent to form an abutting portion 23, and the first end 11 is limited and matched with the abutting portion 23.

[0043] In the assembling process of the insert assembly, when the first end 11 of the first insert 6 is embedded into the first sliding groove 10, the abutting portion 23 can block and limit the first end 11 from a specific direction, that is, the limiting effect is generated on the first insert 6 in the horizontal and vertical directions, so that the first insert 6 is prevented from excessive displacement or disengagement in the first sliding groove 10.

[0044] In the embodiment of the utility model, the first row position 5 is provided with the mounting groove 24 corresponding to the elastic element 7 on the same side of the first end 11, the abutting wall 25 corresponding to the mounting groove 24 is formed in the assembling groove 4, one end of the elastic element 7 is placed in the mounting groove 24, the other end of the elastic element 7 extends outside the mounting groove 24 and elastically abuts with the abutting wall 25.

[0045] The mounting groove 24 provided on the same side of the first end 11 of the first row position 5 provides a special accommodating space for the elastic element 7, so that the elastic element 7 can be stably installed on the first row position 5, the abutting wall 25 formed in the assembling groove 4 is used as the reaction force support point of the elastic element 7, when the elastic element 7 is placed in the mounting groove 24, one end is positioned in the mounting groove 24 and the other end extends outside the mounting groove 24 and contacts with the abutting wall 25 to form the elastic abutment, this layout makes the elastic element 7 be able to elastically deform along the predetermined direction when subjected to external force, and the elastic force is uniformly transmitted to the first row position 5 through the interaction with the mounting groove 24 and the abutting wall 25 during the deformation process; for example, when the melt pressure makes the first row position 5 have a tendency to move outward during the injection molding process, the elastic element 7 is compressed, the reverse elastic force generated by the elastic element 7 precisely acts on the first row position 5 through the abutment with the abutting wall 25 and the constraint in the mounting groove 24, and pushes the first row position 5 to move inward, so as to offset part of the external force and ensure the stability of the relative position of the first insert 6 in the first sliding groove 10, and realize the dynamic fine adjustment and compensation of the insert position.

[0046] It is obvious for those skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims instead of the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model.

Claims

1. A high-precision insert positioning injection mold characterized by, The upper die has an upper die core, and the lower die has a lower die core. The upper die and the lower die are in abutting fit to make the upper die core and the lower die core abut each other to form a die cavity for a molded product. An assembly groove is formed in an end surface of the upper die core. A insert assembly is detachably connected in the assembly groove. The insert assembly comprises a first row, a first insert, an elastic element, a fixing block and an abutting block. A first sliding groove is formed in one side of an end surface of the first row. The first insert has a first end and a second end. The first end is fitted into the first sliding groove, and the second end extends out of the first sliding groove. The second end is provided with a product profiling structure. The upper die core is provided with a channel corresponding to the second end and communicating with the assembly groove. The second end is in abutting fit with the die cavity through the channel. One end of the abutting block is located on a side of the first row away from the first insert and is in slidable abutting fit with the first row. A second sliding groove communicating with the assembly groove is formed in one side of the upper die core. The other end of the abutting block extends out of the upper die core through the second sliding groove and is connected to a power output end of an external power element. The elastic element is located on the same side of the first end to make the first row and the inner wall of the first sliding groove in elastic abutting fit. The fixing block is located at the opening position of the assembly groove to limit the first row, the first insert, the elastic element and the abutting block in the assembly groove.

2. A high-precision insert positioning injection mold according to claim 1, characterized in that, The assembly groove comprises a first groove and a second groove arranged in sequence from top to bottom. The first groove, the second groove and the second sliding groove are in sequence communication. The first groove is provided with a threaded groove. The fixing block is provided with a matching mounting hole. The first row, the first insert, the elastic element and the abutting block are located in the second groove.

3. The high-precision insert positioning injection mold of claim 1, wherein, The fitting end of the abutting block corresponding to the first row is in bevel fit with the first row. The abutting block is provided with a T-shaped sliding rail structure on the bevel thereof. The first row is provided with a T-shaped sliding groove in sliding fit with the T-shaped sliding rail structure.

4. The high-precision insert positioning injection mold according to claim 3, wherein, The T-shaped sliding groove is at least partially in communication with the first sliding groove. The T-shaped sliding rail structure and the first end of the first insert are in up-down spaced fit in the part of the T-shaped sliding groove coinciding with the first sliding groove.

5. A high-precision insert positioning injection mold according to claim 1 or 4, characterized in that, The inner side of the first sliding groove is bent to form an abutting part. The first end is in limiting fit with the abutting part.

6. The high-precision insert positioning injection mold of claim 1, wherein, The first row is provided with a mounting groove corresponding to the elastic element on the same side of the first end. The assembly groove is extended to form an abutting wall corresponding to the mounting groove. One end of the elastic element is located in the mounting groove. The other end of the elastic element extends out of the mounting groove and is in elastic abutting fit with the abutting wall.

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