Injection mold based on mold opening sequence to realize product zero-degree demolding

Abstract

The utility model relates to injection mold technical field especially is involved in an injection mold based on realizing product zero degree demolding of mold sequence, including mutually coordinated front mould main part and back mould main part, and the front mould main part has the front mould upper plate, front mould middle plate and front mould lower plate of butt joint cooperation in proper order, is provided with the first limit long lever in the upper end of front mould middle plate, and the lower end of front mould middle plate is provided with the second limit long lever, and front mould middle plate is limited cooperation with front mould upper plate and front mould lower plate through first limit long lever and second limit long lever respectively, wherein, front mould lower plate is provided with product outside profiling block, and through the design of stage mold opening, first by spade base drive line position slider completes core-pulling, then with the help of front mould middle plate realizes cutting water gap, finally relies on the locking cooperation of barb and inverted buckle, drives back mould top board, insert push plate and ejection component and forces demolding from product inside, avoids the contact of the product high gloss outer surface and the taking mechanism throughout the journey, avoids surface scratch, indentation and other defects, and guarantees product appearance quality.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to an injection mold that achieves zero-degree demolding of products based on the mold opening sequence. Background Technology

[0002] In the field of precision injection molding, as industries such as electronics, automobiles, and home appliances continue to demand higher product appearance quality, the application scenarios for high-gloss surface products are becoming increasingly widespread. These products typically require extremely low surface roughness, free of scratches and contact marks, to meet aesthetic and functional requirements. Simultaneously, to accommodate assembly precision or structural design requirements, some high-gloss products feature a flat side profile (i.e., the sidewall is perpendicular to the product end face, with a draft angle of 0°), further increasing the difficulty of injection molding and demolding processes.

[0003] Existing injection molds face a core contradiction when molding high-gloss, non-draft products: the conflict between demolding and ensuring surface quality. Specifically, to ensure the high gloss of the product surface, direct contact between the demolding mechanism (such as robotic arms or ejector pins) and the product's outer surface must be strictly avoided during demolding. Contact can easily cause scratches, indentations, or friction marks, leading to product appearance defects and failing to meet usage requirements. Therefore, theoretically, demolding should be achieved by applying force from the inside of the product, meaning the demolding mechanism only contacts the inner, non-outer surfaces, thus avoiding damage to the high-gloss outer surface.

[0004] However, the existing structural design of injection molds makes it difficult to achieve this part removal method. On the one hand, the sidewalls of products without draft angles will form a strong clamping force with the mold cavity, resulting in significantly greater demolding resistance than products with draft angles. Sufficient demolding force is required to separate the product from the cavity. On the other hand, the inner side of the product often has a complex cavity structure or space constraints. Existing mold ejection mechanisms (such as conventional ejector pins and ejector plates) cannot provide enough force application points on the inner side of the product, and the direction of force application is difficult to keep consistent with the demolding direction, which can easily lead to deformation of the inner side of the product or the product falling off during the removal process. In addition, although some molds have attempted to use internal core-pulling mechanisms to assist in part removal, the coordinated control of the core-pulling action and the demolding action is difficult, and the setting of the core-pulling component may affect the integrity of the mold cavity, thereby reducing the molding accuracy of the product surface.

[0005] In summary, existing injection molds cannot effectively solve the problem of internal part removal for high-gloss, non-sloping products, resulting in easily damaged surface quality after molding, low production efficiency, and difficulty in meeting the high-quality production requirements of related industries for precision products. Therefore, there is an urgent need to develop an injection mold structure that can achieve stable internal part removal and ensure high-gloss surface quality to overcome the shortcomings of existing technologies. Utility Model Content

[0006] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0007] An injection mold for achieving zero-degree demolding of a product based on the mold opening sequence includes a front mold body and a rear mold body that cooperate with each other. The front mold body has a front mold upper plate, a front mold middle plate, and a front mold lower plate that are sequentially mated together. A first limiting rod is provided at the upper end of the front mold middle plate, and a second limiting rod is provided at the lower end of the front mold middle plate. The front mold middle plate is limited to the front mold upper plate and the front mold lower plate respectively by the first limiting rod and the second limiting rod. The front mold lower plate is provided with a product outer contour block, and the front mold upper plate is provided with a gate that mates with the product outer contour block. A shovel base is fixedly connected to the front mold upper plate, and a sliding slider that mates with the product outer contour block is slidably connected to the front mold lower plate. The sliding slider is driven by the shovel base. The rear mold body has a rear mold base, a rear mold base plate, a rear mold top plate, and an insert push plate. The rear mold base plate is fixedly installed on the rear mold base. The rear mold top plate is guided and connected to the upper part of the rear mold base plate. The insert push plate is guided and connected to the lower part of the rear mold base plate. A fixing rod passing through the rear mold base plate is also connected between the insert push plate and the rear mold top plate. An inner contour block of the product passing through the rear mold top plate is also provided on the rear mold base plate. An ejector component is provided on the insert push plate that is movably embedded in the inner contour block of the product. The inner contour block of the product, the outer contour block of the product, the sliding block, the rear mold top plate, and the ejector component together form the cavity of the molded product. The outer side of the front mold lower plate is also provided with a barb, and the outer side of the rear mold top plate is provided with a sliding seat. A buckle is elastically connected in the sliding seat, and the buckle is set to lock with the barb. The outer side of the rear mold base plate is also provided with a push rod that pushes the buckle to overcome the elastic force. The buckle can slide along the sliding seat to make way for the barb by the push of the push rod.

[0008] Preferably, both the first and second limiting rods are threadedly connected to the middle plate of the front mold. Through holes are provided on both the upper and lower plates of the front mold, and limiting deep holes are also provided in the through holes. The ends of the first and second limiting rods are both expanded portions that are confined within the limiting deep holes, so that the upper plate of the front mold can sequentially perform delayed linkage with the middle plate of the front mold and the lower plate of the front mold during the mold opening process.

[0009] Preferably, an air passage block is inlaid on the outer contour block of the product and connected to the cavity. An air passage connected to the air passage block is provided inside the lower front mold plate. A sealing ring is provided between the air passage block and the lower front mold plate. The surface where the air passage block and the air passage connect is sealed by the sealing ring.

[0010] Preferably, the lower end of the front mold lower plate is provided with a sliding groove, the slide block is slidably connected in the sliding groove, the slide block is provided with an oblique hole, and the lower end of the shovel base has an oblique rod that matches the oblique hole. The oblique rod passes through the front mold middle plate and then movably docks with the oblique hole.

[0011] Preferably, the rear mold base includes a rear mold base plate and square plates installed on both sides of the rear mold base plate. The rear mold base plate is installed on the square plates, so that a space for accommodating the insert push plate is formed between the rear mold base plate and the rear mold base plate through the square plates.

[0012] Preferably, the ejector component includes a T-shaped slide fixedly mounted on the insert push plate and an inclined top insert slidably connected to the T-shaped slide, wherein the inclined top insert is movably fitted into the inner contour block of the product.

[0013] Preferably, the ejector component includes a hollow rod fixedly mounted on the insert push plate, and a core insert extending into the cavity is provided inside the hollow rod. The core insert is fixedly connected to the rear mold base plate.

[0014] Preferably, the combination of the barb, sliding seat, buckle and push rod is provided in multiple sets, which are evenly arranged on the left and right sides of the upper mold body and the lower mold body.

[0015] Preferably, positioning strips are provided on both the front and rear sides of the front mold plate, and positioning blocks that cooperate with the positioning strips are provided on both the front and rear sides of the rear mold base plate. The front mold plate and the rear mold base plate are positioned by the cooperation of the positioning strips and the positioning blocks.

[0016] Compared with the prior art, the beneficial effects of this utility model are: Through a phased mold design, the core is first pulled by the shovel base driving the slide block, then the gate is cut with the help of the front mold plate, and finally the locking fit of the hook and buckle drives the rear mold top plate, insert push plate and ejection parts to demold from the inside of the product. The entire process avoids contact between the part removal mechanism and the high gloss outer surface of the product, avoids surface scratches, indentations and other defects, and ensures the appearance quality of the product. By using the mold opening sequence to simultaneously achieve core pulling, sprue cutting, and inner demolding, there is no need to set up additional complex collaborative control mechanisms, which simplifies the mold structure, reduces the difficulty of operation, and at the same time, the sprue cutting action can directly separate injection molding waste, reduce subsequent processes, and significantly improve production efficiency. The ejector component applies force evenly from the inside of the product. Before applying force, an air blowing mechanism can be set up to blow air into the mold, so that the product and the cavity are initially separated. Combined with the precise matching of the inner and outer contour blocks of the product, even if the product has a non-sloping structure, it can avoid product deformation or falling off during demolding, ensuring product molding accuracy and meeting the production needs of high gloss and non-sloping products in the precision injection molding field.

[0017] 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

[0018] 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.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the front mold upper plate of this utility model in the open state; Figure 3 This is a structural schematic diagram of the front mold plate of this utility model in the open state; Figure 4 This is a schematic diagram of the structure of the front mold lower plate linkage lower mold body movement of this utility model; Figure 5 This is a utility model Figure 4 Schematic diagram of the structure at point A; Figure 6 This is a structural diagram of the present invention with the barb and buckle separated. Figure 7 This is a utility model Figure 6 Schematic diagram of the structure at point B; Figure 8 This is a structural schematic diagram of the present invention in a fully open mold state; Figure 9 This is another structural schematic diagram of the present invention in a fully open mold state; Figure 10 This is a schematic diagram of the structure of the front mold upper plate in this utility model; Figure 11 This is a schematic diagram of the structure of the front mold plate in this utility model; Figure 12 This is a schematic diagram of the outer contour block and the sliding block of the product in this utility model; Figure 13 This is a structural schematic diagram of the rear mold top plate and the insert push plate in this utility model; Figure 14 This is a schematic diagram of the structure of the rear mold base and the rear mold substrate in this utility model.

[0020] The reference numerals and names in the figure are as follows: Front mold body 10, front mold upper plate 11, front mold middle plate 12, through hole 121, limiting deep hole 122, expansion part 123, front mold lower plate 13, airflow channel 131, sealing ring 132, sliding groove 133, first limiting rod 14, second limiting rod 15, outer contour block of product 16, air passage block 161, sprue 17, spade base 18, inclined rod 181, sliding block 19, inclined hole 191, rear mold 20. Main body, 21. Rear mold base, 211. Rear mold base plate, 212. Square plate, 22. Rear mold base plate, 23. Rear mold top plate, 24. Insert push plate, 25. Fixing rod, 26. Inner contour block of product, 27. Ejection component, 271. T-shaped slide, 272. Slanted top insert, 273. Hollow rod, 274. Core insert, 31. Barb, 32. Sliding seat, 33. Buckle, 34. Push rod, 35. Positioning insert, 36. Positioning block. Detailed Implementation

[0021] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] Please see Figure 1-14 In this embodiment of the present invention, an injection mold for achieving zero-degree demolding of a product based on the mold opening sequence includes a front mold body 10 and a rear mold body 20 that cooperate with each other. The front mold body 10 has a front mold upper plate 11, a front mold middle plate 12 and a front mold lower plate 13 that are sequentially mated together. A first limiting rod 14 is provided at the upper end of the front mold middle plate 12 and a second limiting rod 15 is provided at the lower end of the front mold middle plate 12. The front mold middle plate 12 is limited to the front mold upper plate 11 and the front mold lower plate 13 respectively by the first limiting rod 14 and the second limiting rod 15. The front mold lower plate 13 is provided with a product outer contour block 16, the front mold upper plate 11 is provided with a glue inlet 17 that is mated to the product outer contour block 16, the front mold upper plate 11 is fixedly connected with a shovel base 18, and the front mold lower plate 13 is slidably connected with a sliding slider 19 that is mated to the product outer contour block 16. The sliding slider 19 is driven by the shovel base 18. The rear mold body 20 has a rear mold base 21, a rear mold base plate 22, a rear mold top plate 23, and an insert push plate 24. The rear mold base plate 22 is fixedly installed on the rear mold base 21. The rear mold top plate 23 is guided and connected to the upper part of the rear mold base plate 22. The insert push plate 24 is guided and connected to the lower part of the rear mold base plate 22. A fixing rod 25 passing through the rear mold base plate 22 is also connected between the insert push plate 24 and the rear mold top plate 23. An inner contour block 26 of the product passing through the rear mold top plate 23 is also provided on the rear mold base plate 22. An ejector component 27 that is movably embedded in the inner contour block 26 of the product is provided on the insert push plate 24. The inner contour block 26 of the product, the outer contour block 16 of the product, the sliding block 19, the rear mold top plate 23, and the ejector component 27 together form the cavity of the molded product. A barb 31 is provided on the outer side of the front mold lower plate 13, and a sliding seat 32 is provided on the outer side of the rear mold top plate 23. A buckle 33 is elastically connected in the sliding seat 32 and is configured to lock with the barb 31. A pushing rod 34 is provided on the outer side of the rear mold base plate 22 to push the buckle 33 to overcome the elastic force. The buckle 33 can slide along the sliding seat 32 to make way for the barb 31 by pushing the pushing rod 34.

[0023] This injection mold achieves zero-degree demolding of the product by precisely controlling the mold opening sequence. The specific process is as follows: In the initial stage of mold opening, the injection molding machine drives the front mold upper plate 11 to move. The shovel base 18, which is fixedly connected to the front mold upper plate 11, simultaneously drives the sliding block 19 on the front mold lower plate 13 to disengage from the molding chamber, completing the core pulling operation. When the front mold upper plate 11 moves to the first limit rod 14 and forms a limit engagement with the front mold upper plate 11, the front mold upper plate 11 begins to drive the front mold middle plate 12 to move. During the movement, the front mold middle plate 12 performs a gate cutting action, separating the waste material remaining during injection from the product. When the front mold middle plate 12 moves to the second limit rod 15 and forms a limit engagement with the front mold lower plate 13, the front mold middle plate 12 further drives the front mold lower plate 13 to move. Because the barb 31 on the outside of the front mold lower plate 13 and the buckle 33 in the sliding seat 32 on the outside of the rear mold top plate 23 are in a locked engagement state, the front mold lower plate 13 synchronously drives the sliding block 19 on the front mold lower plate 13 to move. The rear mold top plate 23 moves, and the rear mold top plate 23 drives the insert push plate 24 to move together through the fixing rod 25. At this time, the ejector component 27 on the rear mold top plate 23 and the insert push plate 24 work together to apply force from the inside of the product, causing the product to detach from the inner contour block 26 of the product. As the front mold bottom plate 13 and the rear mold top plate 23 continue to move, the push rod 34 fixed on the outside of the rear mold base 21 and the undercut 33 move relative to each other. The two cooperate through the inclined plane, and the push rod 34 causes the undercut 33 to overcome the elastic force and slide along the sliding seat 32 until the undercut 33 and the hook 31 are released from the locking state. The rear mold top plate 23 and the front mold bottom plate 13 are released from the constraint, and the front mold body 10 and the rear mold body 20 are completely separated. Finally, the product that detaches from the inner contour block 26 of the product remains in the front mold body 10. Then, the product is removed from the front mold body 10 along the inside of the product by the robot and other mechanisms, completing the entire demolding process.

[0024] Through the above technical solution, this injection mold effectively solves the pain point of difficulty in demolding high-gloss, non-sloping products from the inside in existing technologies. Firstly, through a phased mold opening design, the core is first pulled by the shovel base 18 driving the slide block 19, then the sprue is cut with the help of the front mold plate 12, and finally, the locking fit between the undercut 31 and the buckle 33 drives the rear mold top plate 23, the insert push plate 24, and the ejector component 27 to demold from the inside of the product. This process avoids contact between the part removal mechanism and the high-gloss outer surface of the product, avoiding surface scratches, indentations, and other defects, thus ensuring the product's appearance quality. Secondly, by using the mold opening sequence to simultaneously achieve core pulling, sprue cutting, and inside demolding, the process is seamless. The addition of a complex collaborative control mechanism simplifies the mold structure and reduces the difficulty of operation. At the same time, the gate cutting action can directly separate the injection waste, reducing subsequent processes and significantly improving production efficiency. Thirdly, the ejector component 27 applies force evenly from the inside of the product. Before applying force, an air blowing mechanism can be set up to blow air into the mold, so that the product and the cavity can be initially separated. Combined with the precise cooperation between the inner contour block 26 and the outer contour block, even if the product has a non-sloping structure, it can avoid product deformation or falling off during demolding, ensuring product molding accuracy and meeting the production needs of high gloss and non-sloping products in the precision injection molding field.

[0025] Please see Figure 10-11 Based on the above technical solution, it is further proposed that the first limiting rod 14 and the second limiting rod 15 are both threadedly connected and fixed to the front mold middle plate 12. Through holes 121 are provided on the front mold upper plate 11 and the front mold lower plate 13. Limiting deep holes 122 are also provided in the through holes 121. The ends of the first limiting rod 14 and the second limiting rod 15 are both provided with expansion parts 123 that are restricted in the limiting deep holes 122, so that the front mold upper plate 11 can sequentially perform delayed linkage with the front mold middle plate 12 and the front mold lower plate 13 during the mold opening process. In the above technical solution, the threaded connection method has convenient disassembly and adjustment characteristics. It can flexibly replace the limiting rod of different lengths according to the molding requirements or mold opening parameters of different products, or finely adjust the connection depth between the limiting rod and the front mold middle plate 12. This allows for precise control of the delayed linkage timing of the front mold upper plate 11 driving the front mold middle plate 12 and the front mold middle plate 12 driving the front mold lower plate 13. This adapts to the demolding requirements of more specifications of high-gloss and non-sloping products, improving the versatility and adaptability of the mold. Furthermore, the matching structure of the limiting deep hole 122 and the expansion part 123 can provide stable guidance and limiting for the limiting rod during the mold opening process. This prevents the limiting rod from shifting due to force, which could cause the linkage of the front mold plates to become stuck or the sequence to be disordered. It ensures that key actions such as core pulling, sprue cutting, and inner demolding are executed accurately in the preset sequence, effectively preventing product surface damage or molding defects caused by abnormal mold opening sequence.

[0026] Please see Figure 12Based on the above technical solution, it is further proposed that an air passage block 161 connected to the cavity is inlaid on the outer contour block 16 of the product, and an air flow channel 131 connected to the air passage block 161 is provided inside the lower front mold plate 13. A sealing ring 132 is provided between the air passage block 161 and the lower front mold plate 13, and the surface where the air passage block 161 and the air flow channel 131 are connected by the air passage is sealed by the sealing ring 132. In the above technical solution, the air passage system formed by the air passage block 161 and the air passage 131 can accurately deliver high-pressure gas into the cavity through the air passage 131 during the demolding stage. This allows the gas to form an "air film" between the outer surface of the product and the outer contour block 16, effectively reducing the adhesion resistance between the product and the contour block. This assists the ejector component 27 in demolding from the inside. Especially for products without a slope, the demolding difficulty caused by the large clamping force can be significantly reduced, avoiding product deformation or surface damage caused by forced demolding, and further ensuring the integrity of the high-gloss surface. Furthermore, the sealing ring 132 can prevent gas leakage at the air passage connection surface, ensuring that the output air pressure of the air passage system is stable and controllable. This avoids poor demolding effect due to insufficient air pressure, prevents gas leakage into other gaps in the mold that affects molding accuracy, and also prevents leaked gas from forming bubbles in the cavity that cause appearance defects in the product.

[0027] Please see Figure 9 , Figure 10 and Figure 12 Based on the above technical solution, it is further proposed that the lower end of the front mold lower plate 13 is provided with a sliding groove 133, the sliding slider 19 is slidably connected in the sliding groove 133, the sliding slider 19 is provided with an oblique hole 191, and the lower end of the shovel base 18 has an oblique rod 181 that matches the oblique hole 191. The oblique rod 181 passes through the front mold middle plate 12 and then movably docks with the oblique hole 191. In the above technical solution, the sliding groove 133 forms a guiding constraint on the slide block 19, so that the slide block 19 always slides along the preset trajectory when it moves with the shovel base 18. This avoids the offset and jamming problems that are prone to occur in the slide block 19 in the traditional non-guided structure, and ensures that the slide block 19 can stably dock with or disengage from the molding cavity. This reduces problems such as insufficient cavity sealing and product molding size deviation caused by slide block offset. It is especially suitable for high-gloss products without slope and the stringent requirements for cavity precision. The matching docking structure of the inclined rod 181 and the inclined hole 191 accurately transforms the linear mold opening movement of the shovel base 18 with the front mold upper plate 11 into the transverse core pulling movement of the slide block 19 along the sliding groove 133. The transmission efficiency is high and the action synchronization is strong. At the same time, the design of the inclined rod 181 passing through the front mold middle plate 12 avoids interference between the front mold middle plate 12 and the shovel base 18 and the slide block 19 during the gate cutting stage. This ensures the continuous execution of the "core pulling-gate cutting" action in the mold opening sequence and reduces the movement conflict of internal mold components.

[0028] Please see Figure 13-14Based on the above technical solution, the rear mold base 21 is further proposed to include a rear mold base plate 211 and square plates 212 installed on both sides of the rear mold base plate 211. The rear mold base plate 22 is installed on the square plates 212, so that a space for accommodating the insert push plate 24 is formed between the rear mold base plate 22 and the rear mold base plate 211 through the square plates 212. The ejection component 27 includes a T-shaped slide 271 fixedly installed on the insert push plate 24 and an inclined top insert 272 slidably connected to the T-shaped slide 271. The inclined top insert 272 is movably fitted with the product inner contour block 26. The ejection component 27 also includes a hollow rod 273 fixedly installed on the insert push plate 24. A core insert 274 extending into the cavity is provided inside the hollow rod 273. The core insert 274 is fixedly connected to the rear mold base plate 211. In the above technical solution, the sliding fit between the inclined ejector insert 272 and the T-shaped slide block 271 allows for precise sliding along the inner contour block 26 of the product under the action of the insert push plate 24. This enables multi-angle, adaptable ejection for complex inner structures of the product, avoiding deformation of the inner side of the product caused by ejection in a single direction. The combination of the hollow rod 273 and the core insert 274 ensures the forming accuracy of the inner cavity of the product through the core insert 274, and also ensures the stable movement of the ejector component 27 by the guiding effect of the hollow rod 273, preventing the core insert 274 from shifting during demolding. In addition, the design of fixing the core insert 274 to the rear mold base plate 211 and moving the hollow rod 273 with the insert push plate 24 allows the hollow rod 273 and the core insert 274 to slide relative to each other during demolding, enabling the product to separate from the core insert 274 simultaneously. Combined with the ejection action of the inclined ejector insert 272, this further improves the smoothness of demolding.

[0029] Please see Figure 4-7 Based on the above technical solution, it is further proposed that multiple sets of the combination of the hook 31, sliding seat 32, buckle 33 and pushing rod 34 be arranged evenly on the left and right sides of the upper mold body and the lower mold body. The symmetrical and uniform layout of the multiple sets of combinations can make the forces on the left and right sides more balanced when the lower mold plate 13 drives the upper mold plate 23 to move synchronously. This avoids the problem of excessive force on one side of the mold and plate tilting caused by the traditional single set or asymmetrical layout. It ensures that the lower mold plate 13 and the upper mold plate 23 always move in parallel, thereby ensuring that the ejector component 27 on the insert push plate 24 applies uniform force to the inner side of the product, preventing the product from deforming or getting stuck in the cavity due to force offset. It is especially suitable for products without slope and the strict requirements of demolding force accuracy.

[0030] Please see Figure 1-3Based on the above technical solution, it is further proposed that positioning inserts 35 are provided on both the front and rear sides of the front mold middle plate 12, and positioning blocks 36 that cooperate with the positioning inserts 35 are provided on both the front and rear sides of the rear mold base plate 22. The front mold middle plate 12 and the rear mold base plate 22 are positioned by the cooperation of the positioning inserts 35 and the positioning blocks 36. This can provide additional guidance and positioning reference for the front mold body 10 and the rear mold body 20 during the mold closing stage, effectively compensate for the mold closing deviation caused by component wear after long-term use of the mold, and ensure the precise docking of components such as the outer contour block 16 of the front mold lower plate 13, the inner contour block 26 of the rear mold base plate 22, and the sliding block 19, avoiding cavity size deviation caused by mold closing misalignment. It is especially suitable for high-gloss, non-sloping products with stringent requirements for cavity precision, ensuring the consistency of product molding dimensions.

[0031] 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 for achieving zero-degree demolding of a product based on the mold opening sequence, comprising a front mold body (10) and a rear mold body (20) that cooperate with each other, characterized in that, The front mold body (10) has a front mold upper plate (11), a front mold middle plate (12) and a front mold lower plate (13) that are connected in sequence. A first limiting rod (14) is provided at the upper end of the front mold middle plate (12) and a second limiting rod (15) is provided at the lower end of the front mold middle plate (12). The front mold middle plate (12) is limited to the front mold upper plate (11) and the front mold lower plate (13) respectively through the first limiting rod (14) and the second limiting rod (15). The front mold lower plate (13) is provided with a product outer contour block (16), and the front mold upper plate (11) is provided with a glue inlet (17) that is connected to the product outer contour block (16). The front mold upper plate (11) is fixedly connected with a shovel base (18), and the front mold lower plate (13) is slidably connected with a sliding slider (19) that is connected to the product outer contour block (16). The sliding slider (19) is driven by the shovel base (18). The rear mold body (20) has a rear mold base (21), a rear mold base plate (22), a rear mold top plate (23), and an insert push plate (24). The rear mold base plate (22) is fixedly installed on the rear mold base (21). The rear mold top plate (23) is guided and connected to the upper part of the rear mold base plate (22). The insert push plate (24) is guided and connected to the lower part of the rear mold base plate (22). A through-hole is also connected between the insert push plate (24) and the rear mold top plate (23). 22) The fixing rod (25); a product inner contour block (26) passing through the rear mold top plate (23) is also provided on the rear mold base plate (22), and an ejector component (27) movably embedded in the product inner contour block (26) is provided on the insert push plate (24); the product inner contour block (26), the product outer contour block (16), the sliding block (19), the rear mold top plate (23) and the ejector component (27) together form the cavity of the molded product; A barb (31) is provided on the outer side of the front mold lower plate (13), and a sliding seat (32) is provided on the outer side of the rear mold top plate (23). A buckle (33) is elastically connected in the sliding seat (32), and the buckle (33) is set to lock with the barb (31). A push rod (34) is provided on the outer side of the rear mold base plate (22) to push the buckle (33) to overcome the elastic force. The buckle (33) can slide along the sliding seat (32) to make way for the barb (31) through the push of the push rod (34).

2. The injection mold for achieving zero-degree demolding of a product based on the mold opening sequence according to claim 1, characterized in that, The first limiting rod (14) and the second limiting rod (15) are both threadedly connected to the middle plate of the front mold (12). Through holes (121) are provided on the upper plate of the front mold (11) and the lower plate of the front mold (13). A limiting deep hole (122) is also provided in the through hole (121). The ends of the first limiting rod (14) and the second limiting rod (15) are both expansion parts (123) that are restricted in the limiting deep hole (122), so that the upper plate of the front mold (11) can sequentially perform delayed linkage with the middle plate of the front mold (12) and the lower plate of the front mold (13) during the mold opening process.

3. The injection mold for achieving zero-degree demolding of a product based on the mold opening sequence according to claim 1, characterized in that, An air passage block (161) is inlaid on the outer contour block (16) of the product and connected to the cavity. An air passage (131) is provided inside the lower front mold plate (13) and connected to the air passage block (161). A sealing ring (132) is provided between the air passage block (161) and the lower front mold plate (13). The surface where the air passage block (161) and the air passage (131) are connected by the air passage is sealed by the sealing ring (132).

4. The injection mold for achieving zero-degree demolding of a product based on the mold opening sequence according to claim 1, characterized in that, The lower end of the front mold lower plate (13) is provided with a sliding groove (133), and the sliding block (19) is slidably connected in the sliding groove (133). The sliding block (19) is provided with an oblique hole (191), and the lower end of the shovel base (18) has an oblique rod (181) that matches the oblique hole (191). The oblique rod (181) passes through the front mold middle plate (12) and then moves to connect with the oblique hole (191).

5. An injection mold for achieving zero-degree demolding of a product based on the mold opening sequence according to claim 1, characterized in that, The rear mold base (21) includes a rear mold base plate (211) and square plates (212) installed on both sides of the rear mold base plate (211). The rear mold base plate (22) is installed on the square plates (212), so that a space for accommodating the insert push plate (24) is formed between the rear mold base plate (22) and the rear mold base plate (211) through the square plates (212).

6. An injection mold for achieving zero-degree demolding of a product based on the mold opening sequence according to claim 5, characterized in that, The ejector component (27) includes a T-shaped slide (271) fixedly mounted on the insert push plate (24) and an inclined top insert (272) slidably connected to the T-shaped slide (271). The inclined top insert (272) is in a movable fit with the inner contour block (26) of the product.

7. An injection mold for achieving zero-degree demolding of a product based on the mold opening sequence according to claim 5, characterized in that, The ejector component (27) includes a hollow rod (273) fixedly mounted on the insert push plate (24). The hollow rod (273) has a core insert (274) extending into the cavity. The core insert (274) is fixedly connected to the rear mold base plate (211).

8. An injection mold for achieving zero-degree demolding of a product based on the mold opening sequence according to claim 1, characterized in that, The combination of the barb (31), sliding seat (32), buckle (33) and push rod (34) is provided in multiple sets, which are evenly arranged on the left and right sides of the upper mold body and the lower mold body.

9. An injection mold for achieving zero-degree demolding of a product based on the mold opening sequence according to claim 1, characterized in that, Positioning inserts (35) are provided on both the front and rear sides of the front mold plate (12), and positioning blocks (36) that cooperate with the positioning inserts (35) are provided on both the front and rear sides of the rear mold base plate (22). The front mold plate (12) and the rear mold base plate (22) are positioned by the cooperation of the positioning inserts (35) and the positioning blocks (36).

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