An injection mold with replaceable shaped inserts

Abstract

The utility model discloses a replaceable injection mold of forming insert relates to injection mold technical field, including mutually butt joint's upper die and lower die, the bottom end extension of upper die has formed with first boss, the top end extension of lower die has formed with second boss, first boss and second boss are misaligned butt joint to form the mold cavity for forming product between the misalignment of first boss and second boss, the top end detachable connection of second boss has formed with forming insert, the bottom end extension of forming insert has formed with step part, and the top end of second boss is equipped with the step groove of adapting to step part, wherein, the top end of forming insert is provided with product profiling part, the lower die, second boss and forming insert are equipped with the passage for the thimble to set up together, and the passage is misaligned with product profiling part and cooperates, realized the accurate positioning and quick replacement of forming insert, and only through replacing insert can get the product of different local characteristics.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an injection mold with replaceable molding inserts. Background Technology

[0002] In the field of injection molding, many products often have a uniform main structure, but require differentiated design for only local features (such as surface textures, local protrusions / grooves, interface shapes, etc.). Examples include different function buttons on the same model of home appliance, different connection ports on the same series of tubing, and the anti-slip texture / brand logo / capacity markings on the bottom of the same specification disposable cup. While existing injection molds with replaceable molding inserts can achieve the replacement of local features for these products, significant technical limitations remain in practical use. On the one hand, existing inserts are often too closely associated with the main structure of the cavity. Even when changing local features, it is still necessary to adjust the overall fit between the insert and the cavity, resulting in poor insert versatility, cumbersome replacement operations, and reduced production efficiency.

[0003] On the other hand, the existing positioning structure of inserts and mold cores is simple and cannot meet the high-precision molding requirements of local features. It is easy for the size deviation of local features to be caused by the installation offset of inserts.

[0004] Therefore, it is necessary to propose a new technical solution to address the above problems. Utility Model Content

[0005] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0006] An injection mold with replaceable molding inserts includes an upper mold core and a lower mold core that are mated to each other. The bottom end of the upper mold core extends to form a first boss, and the top end of the lower mold core extends to form a second boss. The first boss and the second boss are misaligned to form a mold cavity for molding a product between the misalignment of the first boss and the second boss. The top of the second boss is detachably connected to a molded insert, the bottom end of which extends to form a stepped portion, and the top of the second boss is provided with a stepped groove adapted to the stepped portion. The top of the molding insert is provided with a product contour part, and the lower mold core, the second boss, and the molding insert are provided with a channel for ejector pins to pass through, and the channel is misaligned with the product contour part.

[0007] As a further embodiment of this utility model: the molded insert and the second boss are detachably connected by a locking member; The bottom end of the molding insert and the position corresponding to the step are provided with a threaded groove. The lower mold core and its second boss are provided with through holes corresponding to the threaded groove. The threaded section of the locking member passes through the through hole and is screwed into the threaded groove.

[0008] As a further embodiment of this utility model: the mating surface between the molded insert and the second boss is provided with a positioning key and a keyway structure, and the positioning key is arranged in the molded insert in the vertical direction.

[0009] As a further embodiment of this utility model: a hot nozzle is provided at the top of the upper mold core, the product contouring part is located at the top center of the molding insert, the outlet of the hot nozzle is correspondingly provided with the feeding area of ​​the product contouring part, and the axis of the hot nozzle is on the same straight line as the feeding center point of the product contouring part.

[0010] As a further embodiment of this utility model: the top of the lower mold core is provided with a first groove that engages with the first boss; The bottom end of the upper mold core is provided with a second groove that mates with the second boss.

[0011] As a further embodiment of this utility model: the second boss, the molding insert and the lower mold core together constitute a cooling channel for the flow of cooling medium.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention forms a mold cavity by setting a first boss and a second boss with staggered mating, and uses a molding insert with a stepped part to cooperate with the stepped groove of the second boss. Combined with the positioning key and keyway structure and locking part, it realizes the precise positioning and quick replacement of the molding insert. Products with different local features can be obtained by simply changing the insert. At the same time, the precise correspondence between the hot nozzle and the product contour part ensures the stability of feeding, the staggered ejector channel avoids damage to the local features of the product, and the cooling channel accelerates the cooling of the product. Overall, it improves the versatility of the mold, production efficiency and product molding quality.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 yes Figure 2 Enlarged structural diagram at point A; Figure 4 This is a schematic diagram of the upper mold core in this utility model; Figure 5 This is a schematic diagram of the structure of the lower mold core in this utility model.

[0016] The reference numerals and names in the figure are as follows: 1. Upper mold core; 2. Lower mold core; 3. First boss; 4. Second boss; 5. Mold cavity; 6. Molding insert; 7. Stepped part; 8. Step groove; 9. Product contouring part; 10. Channel; 11. Threaded groove; 12. Through hole; 13. Hot nozzle; 14. First groove; 15. Second groove. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-5 In this embodiment of the present invention, an injection mold with a replaceable molding insert 6 includes an upper mold core 1 and a lower mold core 2 that are connected to each other. The upper mold core 1 and the lower mold core 2 are connected to form the main structure of the mold.

[0019] The bottom end of the upper mold core 1 extends to form a first boss 3, and the top end of the lower mold core 2 extends to form a second boss 4. The first boss 3 and the second boss 4 are connected in a staggered manner, and the two enclose the staggered area to form a mold cavity 5 for molding the product. The contour of the mold cavity 5 is adapted to the main structure of the product. The bottom end of the upper mold core 1 is also provided with a second groove 15. Specifically, the bottom end of the first boss 3 is provided with a second groove 15, and the shape and size of the second groove 15 are adapted to the second boss 4. The top end of the lower mold core 2 is provided with a first groove 14, and the shape and size of the first groove 14 are adapted to the first boss 3. When the first boss 3 and the second boss 4 are connected in a staggered manner, the first boss 3 is embedded in the first groove 14, and the second boss 4 is embedded in the second groove 15, so as to improve the stability of the connection between the upper mold core 1 and the lower mold core 2.

[0020] The top of the second boss 4 is detachably connected to a molding insert 6. The top of the molding insert 6 is provided with a product contouring part 9, which is used to mold local features of the product. By replacing different molding inserts 6, products with different local features can be obtained. The bottom end of the molding insert 6 extends to form a step 7, and the top of the second boss 4 is provided with a step groove 8. The step 7 and the step groove 8 are adapted to each other. After the two are engaged, they play a role in the initial positioning and axial limiting of the molding insert 6, preventing the molding insert 6 from moving in the vertical direction.

[0021] The molding insert 6 and the second boss 4 are detachably connected by a locking member. Specifically, a threaded groove 11 is provided at the bottom end of the molding insert 6, corresponding to the position of the step 7. The lower mold core 2 and its second boss 4 are provided with through holes 12 corresponding to the threaded groove 11. The threaded section of the locking member passes through the through hole 12 and is screwed into the threaded groove 11, thereby fixing the molding insert 6 onto the second boss 4. When it is necessary to replace the molding insert 6, simply loosen the locking member to remove the molding insert 6 from the second boss 4, which is a simple operation.

[0022] The mating surfaces of the molding insert 6 and the second boss 4 are provided with a positioning key and a keyway structure (not shown). The positioning key is set vertically on the molding insert 6, and the corresponding position of the second boss 4 is provided with a keyway that matches the positioning key. After the positioning key and the keyway are engaged, the circumferential rotation of the molding insert 6 relative to the second boss 4 can be restricted, further improving the installation accuracy of the molding insert 6 and ensuring that the product contouring part 9 can accurately form the local features of the product.

[0023] A hot nozzle 13 is provided at the top of the upper mold core 1. The hot nozzle 13 is used to inject molten material into the mold cavity 5. The product contouring part 9 is located at the center of the top of the molding insert 6. The outlet of the hot nozzle 13 is corresponding to the feeding area of ​​the product contouring part, and the axis of the hot nozzle 13 is on the same straight line as the feeding center point of the product contouring part. This ensures that the molten material can flow accurately and stably into the area where the product contouring part is located, and ensures the molding quality of the local features of the product.

[0024] The lower mold core 2, the second boss 4, and the molding insert 6 are provided with a channel 10 for ejector pins to pass through. The ejector pins can slide along the channel 10 to eject the product from the mold cavity 5 after the product is molded. The channel 10 is misaligned with the product contour part, that is, the position of the channel 10 avoids the product contour part to prevent the ejector pin from damaging the local features of the product during the ejection process.

[0025] The second boss 4, the molding insert 6, and the lower mold core 2 together form a cooling channel 10 (not shown) for the flow of cooling medium. The cooling medium can flow in the cooling channel 10 to absorb the heat generated by the mold during the molding process, accelerate the cooling speed of the product, improve production efficiency, and at the same time help ensure the dimensional stability of the product.

[0026] In summary, this utility model forms a mold cavity 5 by setting a first boss 3 and a second boss 4 with staggered mating, and uses a molding insert 6 with a stepped part 7 to cooperate with the stepped groove 8 of the second boss 4. Combined with the positioning key and keyway structure and locking parts, it realizes the precise positioning and quick replacement of the molding insert 6. Products with different local features can be obtained by simply changing the insert. At the same time, the precise correspondence between the hot nozzle 13 and the product contour part ensures the stability of feeding, the staggered ejector channel 10 avoids damage to the local features of the product, and the cooling channel 10 accelerates the cooling of the product. Overall, it improves the versatility of the mold, production efficiency and product molding quality.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. An injection mold with replaceable molding inserts, characterized in that, It includes an upper mold core and a lower mold core that are connected to each other. The bottom end of the upper mold core extends to form a first boss, and the top end of the lower mold core extends to form a second boss. The first boss and the second boss are misaligned and connected to form a mold cavity for molding products between the misalignment of the first boss and the second boss. The top of the second boss is detachably connected to a molded insert, the bottom end of which extends to form a stepped portion, and the top of the second boss is provided with a stepped groove adapted to the stepped portion. The top of the molding insert is provided with a product contour part, and the lower mold core, the second boss, and the molding insert are provided with a channel for ejector pins to pass through, and the channel is misaligned with the product contour part.

2. The injection mold for a replaceable molding insert according to claim 1, characterized in that, The molded insert and the second boss are detachably connected by a locking component; The bottom end of the molding insert and the position corresponding to the step are provided with a threaded groove. The lower mold core and its second boss are provided with through holes corresponding to the threaded groove. The threaded section of the locking member passes through the through hole and is screwed into the threaded groove.

3. The injection mold for replaceable molding inserts according to claim 1, characterized in that, The mating surface between the molded insert and the second boss is provided with a positioning key and a keyway structure, and the positioning key is set in the molded insert in the vertical direction.

4. The injection mold for a replaceable molding insert according to claim 1, characterized in that, The top of the upper mold core is provided with a hot nozzle, the product contouring part is located at the top center of the molding insert, the outlet of the hot nozzle is correspondingly provided with the feeding area of ​​the product contouring part, and the axis of the hot nozzle is on the same straight line as the feeding center point of the product contouring part.

5. The injection mold for a replaceable molding insert according to claim 1, characterized in that, The top of the lower mold core is provided with a first groove that engages with the first boss; The bottom end of the upper mold core is provided with a second groove that mates with the second boss.

6. The injection mold for a replaceable molding insert according to claim 1, characterized in that, The second boss, the molding insert, and the lower mold core together form a cooling channel for the flow of cooling medium.

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