Sequential core-pulling injection mold

Abstract

The invention relates to the field of injection molds, and mainly discloses a sequential core-pulling injection mold. Comprising a bottom plate, mold feet oppositely arranged on the side face of the bottom plate, a movable mold plate installed on the mold feet, a fixed mold plate pressed on the side face of the movable mold plate, a heat insulation plate arranged on the side face of the fixed mold plate, a transition plate arranged between the heat insulation plate and the fixed mold plate, and a push plate and an ejector plate which are arranged between the two mold feet. The mold designed by the invention is mainly composed of the lower mold, the upper mold, the core-pulling insert core, the first insert and the second insert, different core-pulling directions and core-pulling areas close to each other are arranged according to the characteristics of the inverted buckle, and sequential core-pulling is designed, so that the completeness of a product in the core-pulling process can be ensured.

Description

Technical Field

[0001] This invention relates to the field of injection molds, and more particularly to a sequential core-pulling injection mold. Background Technology

[0002] Injection molding is a method of shaping industrial products. Products are typically produced using rubber injection molding and plastic injection molding. Injection molding can also be divided into injection molding and die casting.

[0003] Injection molding involves pre-designing various types of molds based on the product. These molds are then assembled into the injection molding machine, and molten plastic is injected. After the molten plastic cools, the mold is opened, and the molded product can be removed. Since product shapes vary, the molds also need to be modified accordingly. Some products are not only non-coplanar but also designed with various intersecting structures such as bends and grooves. In such cases, mold modifications are necessary. Molds are not simply composed of two joined parts; the more joined parts a mold has, the more directional the movement during mold opening becomes. The direction of mold opening is generally required to follow the shape and structure of the product. Molds on the market typically use intelligent control programs for sequential mold opening, resulting in relatively high costs. For relatively compact molds, how to achieve cost-effective and efficient mold opening without affecting product quality remains a challenge and urgently needs improvement. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: in order to achieve sequential core pulling of each insert during the mold opening process for a compact mold, the present invention provides an injection mold that can automatically achieve sequential core pulling by separating the template.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a sequential core-pulling injection mold, including a base plate, mold feet disposed opposite to the side of the base plate, a movable mold plate mounted on the mold feet, a fixed mold plate pressed against the side of the movable mold plate, a heat insulation plate disposed on the side of the fixed mold plate, a transition plate disposed between the heat insulation plate and the fixed mold plate, and a push plate and an ejector plate disposed between the two mold feet;

[0006] The moving template is equipped with a lower mold at one end facing the fixed template, and the fixed template is equipped with an upper mold at one end facing the moving template. A cylinder core-pulling assembly is installed on the side of the fixed template away from the moving template. The cylinder core-pulling assembly passes through the fixed template and is adapted to the upper mold at one end facing the center of the fixed template.

[0007] A slanted guide post core-pulling assembly is installed on the side of the moving template facing the fixed template. The central axis of the slanted guide post core-pulling assembly and the central axis of the cylinder core-pulling assembly are coplanar in the vertical direction. A first insert is installed on the end of the slanted guide post core-pulling assembly facing the lower mold.

[0008] The side of the moving template facing the fixed template is also equipped with a slanted guide post side-pulling assembly, and the end of the slanted guide post side-pulling assembly facing the lower mold is equipped with a second insert.

[0009] Furthermore, in order to facilitate stable injection molding between the upper and lower molds, a sprue sleeve is installed on the side of the heat insulation plate away from the fixed template, and a pouring pipe is inserted into the side of the fixed template facing the heat insulation plate. Protective columns are fixedly installed on the bottom end face of the base plate, the moving template, the fixed template, and the heat insulation plate.

[0010] Furthermore, in order to ensure stable assembly of the mold as a whole, a guide post is fixedly installed on one end face of the heat insulation plate facing the fixed template, a guide sleeve is installed through the fixed template and the moving template, and a guide hole is opened at the end of the mold foot.

[0011] Furthermore, in order to ensure that the moving template and the fixed template remain accurate when they are closed together, a first precision positioning block is embedded in the side wall of the fixed template near the moving template, and a second precision positioning block is embedded in the side wall of the moving template near the fixed template. The opposite end faces of the first precision positioning block and the second precision positioning block are respectively provided with mutually compatible positioning grooves or positioning protrusions.

[0012] Furthermore, to ensure that the fixed template and the moving template are in a relatively static state when they are closed, a locking component is installed on the outer wall of the fixed template, a first insert rod is installed on the outer wall of the heat insulation plate, and a second insert rod is installed on the outer wall of the moving template. A first push block is integrally provided at the end of the first insert rod, and a third push block is integrally provided at the end of the second insert rod at a right angle. The two ends of the first push block along the length direction of the first insert rod are provided with ramps, and the end of the third push block away from the second insert rod is also provided with a ramp.

[0013] Furthermore, in order to enable the locking assembly to be stably assembled with the second insert rod, thereby achieving locking between the fixed template and the moving template, the locking assembly includes a fixed plate fixedly installed on the fixed template, a fixed block fixed on the outer wall of the fixed plate, two lock holes opened on the fixed block, a sliding groove opened on the fixed block connecting the two lock holes, a lock cylinder sliding inside the sliding groove, and a tightening spring. The lock cylinder is generally arranged in a U-shape, and the two ends of the lock cylinder facing the moving template and close to the first insert rod are provided with bevels.

[0014] Furthermore, to delay the adjustment of the fixed template during mold opening and separation by the transition plate, thereby ensuring stable separation of the fixed template and the moving template, a reset spring assembly is installed on the fixed template. The reset spring assembly includes a delay rod fixedly mounted on the transition plate at one end and a through hole in the fixed template through which the delay rod passes. The diameter of the through hole at the end away from the transition plate is larger than the diameter at the end near the transition plate. The fixed template also has a groove communicating with the through hole on the end face facing the transition plate. A preload spring is installed in the groove. A stop block is provided at the end of the delay rod away from the transition plate. The diameter of the stop block is larger than the diameter of the through hole at the end near the transition plate, and smaller than the diameter of the through hole at the end away from the transition plate.

[0015] Furthermore, in order to ensure that the cylinder core-pulling assembly can achieve stable and effective core-pulling operation, the cylinder core-pulling assembly includes a guide block installed on the fixed template and a core-pulling insert that penetrates the fixed template. A vertical block is installed at the end of the guide block, and a core-pulling cylinder is installed on the end face of the vertical block. The output shaft end of the core-pulling cylinder penetrates the vertical block and is connected to a traction block. A connecting groove is opened at the end of the traction block, and the end of the core-pulling insert is slidably disposed in the connecting groove.

[0016] The cylinder core-pulling assembly also includes a positioning base fixed on a fixed template. The positioning base has an oblique hole, through which the core-pulling insert passes. The outer wall of the core-pulling insert has a first plane along its length, and the inner wall of the oblique hole has a second plane along its length. When the core-pulling insert passes through the oblique hole, the first plane and the second plane are matched.

[0017] Furthermore, in order to enable the inclined guide post core-pulling assembly to pull the core synchronously when the fixed template and the moving template are separated, the inclined guide post core-pulling assembly includes a first slider base fixedly installed on the moving template, a first slide block slidably installed on the first slider base, a shovel base fixedly installed on the fixed template and facing the first slide block, a first inclined guide post fixedly installed at the end of the shovel base, and a first through hole opened on the first slide block for the first inclined guide post to pass through.

[0018] The first slide block is fixedly connected to the first insert at one end facing the center of the moving template. The first slide block is equipped with a first cooling water channel, which passes through the interior of the first insert.

[0019] Furthermore, in order to enable the inclined guide post side-pulling assembly to simultaneously pull the core when the fixed template and the moving template are separated, the inclined guide post side-pulling assembly includes a bidirectional slider base and a second slider base installed on the moving template, a second slide block slidably disposed between the second slider base and the bidirectional slider base, an inclined guide post fixing seat fixed on the fixed template and disposed opposite to the second slide block, and a second inclined guide post installed on the inclined guide post fixing seat.

[0020] The second slide has a second through hole along the length of the second inclined guide post. A second cooling water channel is installed inside the second slide and passes through the interior of the second insert.

[0021] The beneficial effects of the present invention are that the mold designed in the present invention is mainly composed of a lower mold, an upper mold, a core-pulling insert, a first insert, and a second insert. Different core-pulling directions are set for the undercut feature, and the core-pulling areas are close to each other. The sequential core-pulling design can ensure the integrity of the product during the core-pulling process.

[0022] Specially designed for product shape differences, the core-pulling mechanism allows for independent yet interconnected core-pulling of each component. Through the separation process of the fixed and moving templates, the core-pulling components of the inclined guide post and the inclined guide post side-pulling component are automatically and synchronously pulled, eliminating the need for additional core-pulling power. This saves on core-pulling power and avoids the need for additional control components, thus reducing costs.

[0023] The locking component, which is set up at the same time, works in conjunction with the first and second insert rods. Only when the transition plate is separated to a certain extent during the mold opening process will the locking state between the moving platen and the fixed platen be automatically released. Moreover, the cooperation between the locking component and the first and second insert rods is achieved through a simple mechanical structure. It can also achieve intelligent unlocking without the need for an additional controller to issue commands.

[0024] The inclined guide pillar core-pulling assembly and the inclined guide pillar side-pulling assembly achieve the core-pulling action through their respective inclined guide pillars. The action of the inclined guide pillars is automatically adjusted by the separation of the moving template and the fixed template. Therefore, both core-pulling and mold opening and subsequent mold re-closing can be automatically adjusted without manual operation.

[0025] The ejector plate can move toward the moving template after the core pulling action is completed, and then the ejector pins on the ejector plate can be used to eject the molded product, so as to facilitate the removal of the product and the next injection molding operation. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Figure 1 This is a schematic diagram of the optimal embodiment of a sequential core-pulling injection mold according to the present invention.

[0028] Figure 2 This is a partial exploded view of a sequential core-pulling injection mold according to the present invention.

[0029] Figure 3 This is a schematic diagram of the fixed template in a sequential core-pulling injection mold according to the present invention.

[0030] Figure 4 This is a schematic diagram of the fixed template in a sequential core-pulling injection mold according to the present invention from another perspective.

[0031] Figure 5 This is a schematic diagram of the assembly of the moving template in a sequential core-pulling injection mold according to the present invention.

[0032] Figure 6 This is a schematic diagram of the moving template in a sequential core-pulling injection mold according to the present invention;

[0033] Figure 7 This is a schematic diagram of the bottom plate in a sequential core-pulling injection mold according to the present invention;

[0034] Figure 8 This is a schematic diagram of the connection between the heat insulation plate and the transition plate in a sequential core-pulling injection mold according to the present invention;

[0035] Figure 9 yes Figure 2 The front view;

[0036] Figure 10 yes Figure 9 A cross-sectional view along the AA direction;

[0037] Figure 11 This is a schematic diagram of the locking component in a sequential core-pulling injection mold according to the present invention;

[0038] Figure 12 This is an exploded view of a locking component in a sequential core-pulling injection mold according to the present invention;

[0039] Figure 13 This is a schematic diagram of the combination of the upper mold, the first insert, and the second insert in a sequential core-pulling injection mold according to the present invention;

[0040] Figure 14 This is a schematic diagram of another perspective combination of the upper mold, the first insert, and the second insert in a sequential core-pulling injection mold according to the present invention;

[0041] Figure 15 This is a schematic diagram showing the connection between the cylinder core-pulling assembly and the inclined guide post core-pulling assembly in a sequential core-pulling injection mold according to the present invention.

[0042] Figure 16 yes Figure 13 The right view;

[0043] Figure 17 yes Figure 16 A cross-sectional view along the BB direction;

[0044] Figure 18 This is an assembly diagram of the core-pulling insert and the positioning base in a sequential core-pulling injection mold according to the present invention.

[0045] Figure 19 This is a schematic diagram of the oblique guide post side-pulling assembly in a sequential core-pulling injection mold according to the present invention;

[0046] Figure 20 This is a plan view of the inclined guide post side-pulling assembly in a sequential core-pulling injection mold according to the present invention;

[0047] Figure 21 yes Figure 20 A cross-sectional view along the CC direction.

[0048] In the diagram: 100. Product; 1. Base plate; 2. Mold foot; 3. Moving mold plate; 4. Fixed mold plate; 5. Heat insulation board; 6. Transition plate; 7. Sprue sleeve; 8. Protective column; 9. Casting pipe; 10. Guide column;

[0049] 11. Cylinder core-pulling assembly; 111. Stand block; 112. Core-pulling cylinder; 113. Guide block; 114. Traction block; 115. Limiting groove; 116. Connecting groove; 117. Core-pulling insert; 118. Positioning base; 119. Angled hole;

[0050] 12. Inclined guide post core-pulling assembly; 121. Shovel base; 122. First cooling water channel; 123. First slide block; 124. First positioning post; 125. First inclined guide post; 126. First slider base;

[0051] 13. Angled guide post side-pull assembly; 131. Bidirectional slider base; 132. Second slider base; 133. Second slide block; 134. Second cooling water channel; 135. Second angled guide post; 136. Angled guide post fixing seat; 137. Second positioning post;

[0052] 14. Guide sleeve; 15. Connecting block; 151. Lifting hole; 16. Locking block; 17. First precision positioning block; 18. Second precision positioning block; 19. Guide hole; 20. Push plate; 21. Ejector plate; 22. Support column; 23. Reset rod; 24. Guide rod; 25. Pressure block; 26. Push plate limit switch; 27. Socket;

[0053] 28. First insert rod; 281. First push block; 282. Second push block;

[0054] 29. Locking assembly; 291. Fixing plate; 292. Fixing block; 293. Lock hole; 294. Slide groove; 295. Lock cylinder; 296. Bevel; 297. Tightening spring;

[0055] 30. Insert rod limit switch; 31. Second insert rod; 311. Third push block;

[0056] 32. Return spring assembly; 321. Delay rod; 322. Through hole; 323. Groove; 324. Preload spring;

[0057] 33. Lower mold; 34. Upper mold; 341. Casting hole; 35. First insert; 36. Second insert; 37. Positioning plate; 371. Limiting block. Detailed Implementation

[0058] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0059] Example 1: As Figures 1 to 6 The diagram shows the preferred embodiment of the present invention: a sequential core-pulling injection mold, comprising a base plate 1, with mold feet 2 arranged vertically opposite each other on one side of the base plate 1, a movable mold plate 3 arranged on the side of the mold feet 2 away from the base plate 1, a fixed mold plate 4 pressed onto the side of the movable mold plate 3 away from the mold feet 2, a heat insulation plate 5 arranged on the side of the fixed mold plate 4 away from the movable mold plate 3, a transition plate 6 provided between the heat insulation plate 5 and the fixed mold plate 4, a sprue sleeve 7 installed in the middle area of ​​the side of the heat insulation plate 5 away from the fixed mold plate 4, and a casting pipe 9 inserted into the side of the fixed mold plate 4 facing the heat insulation plate 5. When the heat insulation plate 5 is assembled and fitted with the fixed mold plate 4 through the transition plate 6, the end of the casting pipe 9 passes through the transition plate 6 and connects to the end of the sprue sleeve 7, and the end of the casting pipe 9 away from the sprue sleeve 7 passes through the fixed mold plate 4. After the mold is assembled between the fixed mold plate 4 and the movable mold plate 3, injection molding liquid is introduced from the sprue sleeve 7, and the injection molding liquid enters the mold through the casting pipe 9, thereby realizing injection molding. Protective posts 8 are fixedly installed on the bottom end faces of the base plate 1, moving template 3, fixed template 4 and heat insulation plate 5. The protective posts 8 can ensure that the module as a whole can maintain relative stability whether it is being transported or used later.

[0060] To ensure stable assembly between the heat insulation board 5, the fixed template 4, and the moving template 3, guide posts 10 are fixedly installed at the four corners of the end face of the heat insulation board 5 facing the fixed template 4, and guide sleeves 14 are installed through the corners of the fixed template 4 and the moving template 3. When the heat insulation board 5 is assembled on the outside of the fixed template 4, the guide posts 10 are sequentially installed through the guide sleeves 14 on the fixed template 4 and the moving template 3.

[0061] A lower mold 33 is fixedly installed on the end face of the moving mold plate 3 facing the fixed mold plate 4, and an upper mold 34 is fixedly installed on the end face of the fixed mold plate 4 facing the moving mold plate 3. To ensure that the top and sides of the product 100 can be easily demolded after molding, a cylinder core-pulling assembly 11 is installed on the bottom side of the fixed mold plate 4 away from the moving mold plate 3. One end of the cylinder core-pulling assembly 11 facing the center area of ​​the fixed mold plate 4 passes through the fixed mold plate 4 and is adapted to the upper mold 34. A slanted guide post core-pulling assembly 12 is installed on the bottom side of the moving mold plate 3 facing the fixed mold plate 4. The central axis of the slanted guide post core-pulling assembly 12 and the central axis of the cylinder core-pulling assembly 11 are coplanar in the vertical direction. A first insert 35 is installed on the end face of the slanted guide post core-pulling assembly 12 facing the lower mold plate 33. A slanted guide post side-pulling assembly 13 is also installed on the side face of the moving mold plate 3 facing the fixed mold plate 4. A second insert 36 is installed on the end face of the slanted guide post side-pulling assembly 13 facing the lower mold plate 33. The end faces of the first insert 35 and the second insert 36 are closely fitted together. Figure 13 and Figure 14 The first insert 35, the second insert 36 and the upper mold 34 can be completely combined, so that they can be fully adapted to the lower mold 33. At the same time, the upper mold 34 has a pouring hole 341 on the outer wall facing the fixed template 4. The end of the pouring pipe 9 is sealed and inserted into the pouring hole 341. When the injection liquid is introduced into the pouring pipe 9, the injection liquid can enter between the upper mold 34 and the lower mold 33 through the pouring hole 341, and then finally be injection molded.

[0062] To prevent loosening between the moving template 3 and the fixed template 4 during the overall handling and assembly of the injection mold, the tops of the moving template 3 and the fixed template 4 are fixedly connected by a connecting block 15. The connecting block 15 has a lifting hole 151, which facilitates the subsequent lifting and handling of the entire injection mold. In addition, a locking block 16 is fixedly installed between the side walls of the moving template 3 and the fixed template 4 to prevent the moving template 3 and the fixed template 4 from loosening and separating during handling.

[0063] To ensure assembly accuracy when the moving template 3 and the fixed template 4 are assembled, a first precision positioning block 17 is embedded in the middle of the side wall of the fixed template 4 near the moving template 3, and a second precision positioning block 18 is embedded in the middle of the side wall of the moving template 3 near the fixed template 4. The opposite end faces of the first precision positioning block 17 and the second precision positioning block 18 are respectively provided with mutually compatible positioning grooves or positioning protrusions.

[0064] like Figure 7As shown, each end of the mold foot 2 is provided with a guide hole 19. When the heat insulation plate 5 is attached to the outside of the fixed template 4, the end of the guide post 10 away from the heat insulation plate 5 is inserted into the guide hole 19. A push plate 20 is provided between the two mold feet 2. An ejector plate 21 is installed on the end face of the push plate 20 away from the bottom plate 1. Several ejector pins are provided on the end face of the ejector plate 21 facing the moving template 3. The ejector pins pass through the moving template 3 and the lower mold 33. By setting an ejector rod on the side of the bottom plate 1 away from the moving template 3, the end of the ejector rod is connected to the push plate 20. When the ejector rod moves, it can push the push plate 20 to move between the mold feet 2. The push plate 20 pushes the ejector plate 21 to move. The ejector pins on the ejector plate 21 can eject the molded product 100 on the lower mold 33, making it convenient to remove the product 100.

[0065] A support column 22 is fixedly installed on the end face of the base plate 1 facing the moving template 3. The support column 22 passes through the push plate 20 and the ejector plate 21. When the moving template 3 is pressed against the mold foot 2, the support column 22 can provide auxiliary support for the moving template 3 to ensure stability. A reset rod 23 is fixedly installed on the ejector plate 21 near the end corner. The end of the reset rod 23 away from the ejector plate 21 passes through the moving template 3. A guide rod 24 is also fixedly installed on the base plate 1. The guide rod 24 passes through the push plate 20 and the ejector plate 21. The guide rod 24 can keep the push plate 20 and the ejector plate 21 relatively stable when they move and are adjusted.

[0066] A pressure block 25 is fixedly installed on one side of the outer wall of the ejector plate 21. A push plate limit switch 26 is fixedly installed on one side of the outer wall of the base plate 1, which is directly opposite the pressure block 25. When the push plate 20 is pressed against the base plate 1, the pressure block 25 is pressed against the push plate limit switch 26. When the push plate 20 pushes the ejector plate 21 and moves the moving template 3, the pressure block 25 leaves the push plate limit switch 26, and the push plate limit switch 26 can release a signal. A socket 27 is also fixedly installed on the outer wall of the mold foot 2. In the subsequent assembly process, sensors can be installed inside the moving template 3 and the fixed template 4 to detect internal data and monitor it.

[0067] In actual use, the injection mold is hoisted into the injection molding machine through the hoisting hole 151 on the connecting block 15. After assembly, the connecting block 15 and the locking block 16 are removed. Then, the injection liquid is injected through the sprue sleeve 7. The injection liquid enters the mold through the pouring pipe 9. After the injection is completed, the heat insulation plate 5 and the transition plate 6 are separated. Then, the cylinder core pulling assembly 11 is started. After the cylinder core pulling assembly 11 completes its work, the fixed platen 4 is separated. Then, the inclined guide post core pulling assembly 12 and the inclined guide post side pulling assembly 13 are started respectively. After the inclined guide post core pulling assembly 12 and the inclined guide post side pulling assembly 13 have completed their work, the push plate 20 can be adjusted to push out the moving platen 3 through the ejector plate 21. The molded product 100 is then removed from the lower mold 33 on the moving platen 3.

[0068] Example 2: Figure 3 , Figure 4 , Figure 6 and Figure 8 As shown, a locking component 29 is fixedly installed on the outer wall of the fixed template 4, close to the moving template 3. A first insert rod 28 is fixedly installed on the outer wall of the heat insulation plate 5, and a second insert rod 31 is fixedly installed on the outer wall of the moving template 3. When the moving template 3, the fixed template 4, and the heat insulation plate 5 are assembled together, the end of the first insert rod 28 away from the heat insulation plate 5 and the end of the second insert rod 31 away from the moving template 3 both pass through the locking component 29. The locking component 29 can maintain the tight fit between the moving template 3 and the heat insulation plate 5 on both sides of the fixed template 4 through the first insert rod 28 and the second insert rod 31. An insert rod limit switch 30 is also fixedly installed on the outer wall of the fixed template 4, close to the first insert rod 28. When the heat insulation plate 5 is separated from the fixed template 4, the first insert rod 28 will control the action of the insert rod limit switch 30, thereby releasing a signal.

[0069] like Figure 11 and Figure 12 As shown, the locking assembly 29 includes a fixing plate 291 fixedly installed on the fixed template 4. A fixing block 292 is fixedly installed on the outer wall of the fixing plate 291. Two locking holes 293 are opened on the fixing block 292, which are respectively set to the first insertion rod 28 and the second insertion rod 31. A sliding groove 294 is opened in the middle of one end face of the fixing block 292 facing the fixing plate 291, and the sliding groove 294 is connected to the two locking holes 293. A lock cylinder 295 is slidably installed inside the sliding groove 294. The lock cylinder 295 is in the shape of a U. The two edges of the lock cylinder 295 facing the moving template 3 and close to the first insertion rod 28 are provided with inclined surfaces 296. A tightening spring 297 is also installed in the sliding groove 294. The tightening spring 297 is located between one end of the lock cylinder 295 and one end of the sliding groove 294.

[0070] When the moving template 3, the fixed template 4, and the heat insulation plate 5 are fixedly assembled, the first insert rod 28 and the second insert rod 31 are respectively inserted into the corresponding locking holes 293. When the heat insulation plate 5 is separated, the first insert rod 28 moves synchronously and will disengage from the corresponding locking hole 293. After that, the fixed template 4 and the moving template 3 are separated, and the second insert rod 31 will also disengage from the corresponding locking hole 293.

[0071] The end of the first insertion rod 28 is integrally provided with a first push block 281, which is positioned towards the inclined surface 296. A second push block 282 is fixedly installed on the outer wall of the first insertion rod 28 away from the first push block 281. The end of the second insertion rod 31 is integrally provided with a third push block 311 positioned at a right angle. Both ends of the first push block 281 and the second push block 282 along the length direction of the first insertion rod 28 are provided with slopes. The end of the third push block 311 away from the second insertion rod 31 is also provided with a slope facing the inclined surface 296. When the first insertion rod 28 and the second insertion rod 31 are respectively inserted into the corresponding lock holes 293, the third push block 311, which is set at a right angle at the end of the second insertion rod 31, will limit it, thereby locking the second insertion rod 31 in conjunction with the lock cylinder 295. When the first insertion rod 28 begins to be withdrawn, the second push block 282 will first contact the insertion rod limit switch 30, thereby releasing the heat insulation plate 5 separation signal. Then the first insertion rod 28 continues to move until the first push block 281 enters the lock hole 293 and pushes the lock cylinder 295 to move in the slide groove 294 through the ramp. At this time, the third push block 311 at the end of the second insertion rod 31 can pass through the corresponding lock hole 293 to realize the disengagement operation. When reassembling, the ramp at the top of the third push block 311 can also automatically push the lock cylinder 295 to move without affecting normal assembly.

[0072] like Figure 3 , Figure 9 and Figure 10 As shown, the fixed template 4 is also equipped with several reset spring assemblies 32. The reset spring assembly 32 includes a delay rod 321. One end of the delay rod 321 is fixedly installed on the transition plate 6. The fixed template 4 has a through hole 322 through which the delay rod 321 passes. The diameter of the through hole 322 at the end away from the transition plate 6 is larger than the diameter at the end near the transition plate 6. The fixed template 4 also has a groove 323 corresponding to the through hole 322 at the end facing the transition plate 6. The bottom of the groove 323 is connected to the through hole 322. A preload spring 324 is provided in the groove 323. The delay rod 321 passes through the preload spring 324. A stop block is integrally provided at the end of the delay rod 321 away from the transition plate 6. The diameter of the stop block is larger than the diameter of the through hole 322 at the end near the transition plate 6 and smaller than the diameter of the through hole 322 at the end away from the transition plate 6.

[0073] When the transition plate 6 separates from the fixed template 4 along with the heat insulation plate 5, the delay rod 321 will also move synchronously. When the stop block moves to the junction of two different diameter holes in the through hole 322, the first push block 281 pushes the lock cylinder 295 to move. The heat insulation plate 5 can continue to move and drive the fixed template 4 to move synchronously through the delay rod 321. At this time, the second insertion rod 31 will not lock the fixed template 4 through the lock cylinder 295.

[0074] Compared to Embodiment 1, this embodiment adds a locking component 29 and corresponding first insert rod 28 and second insert rod 31. When the heat insulation plate 5 and the fixed template 4 reach their farthest position, the transition plate 6 can drive the fixed template 4 to move through the delay rod 321. At the same time, the first insert rod 28 will also adjust the locking component 29, thereby causing the lock cylinder 295 to disengage from the second insert rod 31, realizing the normal separation of the fixed template 4 and the moving template 3.

[0075] Example 3: Figures 15 to 18 As shown, the cylinder core-pulling assembly 11 includes two guide blocks 113 symmetrically arranged on the side of the fixed template 4. The guide blocks 113 are positioned away from the moving template 3. One end of each guide block 113, away from the center region of the fixed template 4, protrudes outward from the outside of the fixed template 4. A vertical block 111 is fixedly installed at the end of each guide block 113 away from the center region of the fixed template 4. A core-pulling cylinder 112 is fixedly installed at the end face of the vertical block 111 away from the guide block 113. The output shaft end of the core-pulling cylinder 112 passes through the vertical block 111 and is connected to a traction block 114. The traction block 114 is slidably connected to the guide blocks 113 on both sides. The end of the traction block 114 away from the core-pulling cylinder 112 is connected to the core-pulling insert 117. The end of the core-pulling insert 117 away from the core-pulling cylinder 112 passes through the fixed template 4 and is adapted to the upper mold 34. The core-pulling insert 117 and the upper mold 34 are used together to form the tube at the top of the product 100. After the product 100 is formed, the core-pulling insert 117 is pulled out through the core-pulling cylinder 112, which can ensure the injection molding of the tube at the top of the product 100.

[0076] A positioning base 118 is also fixedly installed on the template 4. The positioning base 118 is located near the guide block 113 and has an oblique hole 119. The core puller 117 is installed through the oblique hole 119. The outer wall of the core puller 117 has a first plane along its length direction, and the inner wall of the oblique hole 119 has a second plane along its length direction. The first plane and the second plane are adapted to each other. When the core puller 117 passes through the oblique hole 119, the first plane and the second plane can prevent the core puller 117 from rotating during the core pulling process.

[0077] A connecting groove 116 is provided at the end of the traction block 114 away from the core-pulling cylinder 112. The end of the core-pulling insert 117 is slidably disposed in the connecting groove 116. During the core-pulling process, the core-pulling insert 117 not only moves along the working direction of the core-pulling cylinder 112, but also moves along the length direction of the inclined hole 119. Therefore, there will be relative movement between the end of the core-pulling insert 117 and the traction block 114. The setting of the connecting groove 116 can ensure that the core-pulling insert 117 automatically adjusts relative to the traction block 114.

[0078] A limit groove 115 is provided on the end face of the traction block 114 away from the fixed template 4, combined with Figure 8 A positioning plate 37 is fixedly installed on the end face of the transition plate 6 facing the fixed template 4. A limiting block 371 is integrally provided on the positioning plate 37, which is positioned opposite the limiting groove 115. When the transition plate 6 is attached to the fixed template 4, the limiting block 371 is locked in the limiting groove 115. When the heat insulation plate 5 is not separated from the fixed template 4, the limiting block 371 will limit the traction block 114 through the limiting groove 115. At this time, even if the core-pulling cylinder 112 is activated, the traction block 114 cannot pull the core into the core insert 117. Only when the transition plate 6 is separated from the fixed template 4 will the traction block 114 be locked, which can ensure the subsequent core-pulling sequence.

[0079] The inclined guide post core-pulling assembly 12 includes a first slider base 126 fixedly mounted on the moving template 3. A first slide block 123 is slidably mounted on the side of the first slider base 126 facing the inclined guide post core-pulling assembly 13. The sliding direction of the first slide block 123 is the same as the moving direction of the traction block 114. One end face of the first slide block 123 facing the center region of the moving template 3 is fixedly connected to the first insert 35. A shovel base 121 is fixedly mounted on the end face of the fixed template 4 facing the first slide block 123. A first inclined guide post 125 is mounted on the end of the shovel base 121 facing the first slide block 123. The first inclined guide post 125 passes through the first slide block 123. The first slide block 123 is provided with a first through hole along the length direction of the first inclined guide post 125. When the fixed template 4 begins to separate from the moving template 3, the fixed template 4 will drive the shovel base 121 to move synchronously. The movement of the shovel base 121 will drive the first inclined guide post 125 to move. When the first inclined guide post 125 moves, it will slide in the first through hole. At this time, the movement direction of the first inclined guide post 125 is not collinear with the length direction of the first through hole. Therefore, the movement of the first inclined guide post 125 will drive the first slide block 123 to move synchronously along the movement direction of the traction block 114 through the first through hole, thereby realizing the extraction of the first insert 35.

[0080] The first slide 123 has a first cooling water passage 122 installed inside. The first cooling water passage 122 passes through the interior of the first insert 35, and both the inlet and outlet of the first cooling water passage 122 extend out of the interior of the first slide 123. The first cooling water passage 122 can effectively dissipate heat from the first insert 35.

[0081] A first positioning post 124 is fixedly installed on one end face of the moving template 3 facing the first slide 123. An elastic protrusion is provided at the end of the first positioning post 124 facing the first slide 123. A first positioning groove is provided on the end face of the first slide 123 facing the moving template 3. Theoretically, there should be two first positioning grooves, which correspond to the working position of the first slide 123 during injection molding and the working position of the first slide 123 after the inclined guide post core pulling assembly 12 has completed core pulling.

[0082] like Figures 19 to 21 As shown, the inclined guide post side-pulling assembly 13 includes a bidirectional slider base 131 and a second slider base 132 fixedly installed on the moving template 3. The second slider base 132 is located away from the first slider base 126. A second slide block 133 is slidably disposed between the second slider base 132 and the bidirectional slider base 131. One end of the second slide block 133 facing the center region of the moving template 3 is fixedly connected to the second insert 36. An inclined guide post fixing seat 136 is fixedly installed on the end face of the fixed template 4 facing the moving template 3, which is directly opposite the second slide block 133. A second inclined guide post 135 is installed on the end of the inclined guide post fixing seat 136 facing the second slide block 133, and the second inclined guide post 135 passes through the second slide block. The second slide 133 is provided with a second through hole along the length of the second inclined guide post 135. Similarly, when the fixed template 4 begins to separate from the moving template 3, the fixed template 4 will drive the inclined guide post fixing seat 136 to move synchronously. The movement of the inclined guide post fixing seat 136 will drive the second inclined guide post 135 to move. When the second inclined guide post 135 moves, it will slide in the second through hole. At this time, the movement direction of the second inclined guide post 135 is not collinear with the length direction of the second through hole. Therefore, the movement of the second inclined guide post 135 will drive the second slide 133 to slide between the bidirectional slider base 131 and the second slider base 132 through the second through hole, thereby realizing the removal of the second insert 36.

[0083] The bidirectional slider base 131 is positioned along the length of the first slide 123 at one end face opposite to the first slide 123, and the end face of the first slide 123 away from the first slide 123 is slidably connected to the bidirectional slider base 131. The bidirectional slider base 131 ensures that the second slide 133 can slide stably while also ensuring that the first slide 123 can slide stably.

[0084] The second slide 133 has a second cooling water passage 134 installed inside. The second cooling water passage 134 passes through the interior of the second insert 36, and both the inlet and outlet of the second cooling water passage 134 extend out of the interior of the second slide 133. The second cooling water passage 134 can effectively dissipate heat from the second insert 36.

[0085] A second positioning post 137 is also fixedly installed on one end face of the moving template 3 facing the second slide 133. An elastic protrusion is also provided on the end face of the second positioning post 137 facing the second slide 133. A second positioning groove is provided on the end face of the second slide 133 facing the moving template 3. Similarly, two second positioning grooves are also provided, which correspond to the working position of the second slide 133 during injection molding and the working position of the second slide 133 after the inclined guide post side pulling assembly 13 has completed core pulling.

[0086] Working principle: The connecting block 15 and locking block 16 are assembled onto the relative positions of the moving platen 3 and the fixed platen 4. Then, the entire mold is hoisted into the injection molding machine through the lifting hole 151 for installation. After the mold is installed stably, the connecting block 15 and locking block 16 are removed, and the injection molding liquid is introduced into the sprue sleeve 7. The injection molding liquid enters the upper mold 34 through the pouring pipe 9 and enters the mold through the pouring hole 341. After the product 100 is formed, the mold opening command is issued, and the injection molding and ejector pins retract. At this time, the transition plate 6 separates from the fixed platen 4 under the action of the pre-compression spring 324. The core-pulling cylinder 112 is activated, and the core-pulling insert 117 moves along the inclined hole 119 to pull the core until it is completely pulled out. During the separation of the fixed platen 4, the first push block 281 on the first insert 28 will trigger the locking component 29, and the locking component 29 will release the second insert 31. Locking, the fixed template 4 and the moving template 3 are separated. During the separation process, the fixed template 4 limits the first inclined guide post 125 and the second inclined guide post 135 through the shovel base 121 and the inclined guide post fixing seat 136 respectively. The first inclined guide post 125 and the second inclined guide post 135 then drive their respective first slide block 123 and second slide block 133 to slide and adjust, thereby realizing the core pulling of the first insert 35 and the second insert 36 respectively. After the upper mold 34 is separated and the core pulling insert 117, the first insert 35 and the second insert 36 are pulled, the product 100 will remain on the lower mold 33. The injection molding machine ejector rod is started. The ejector rod indirectly pushes the ejector plate 21 to move. The ejector pin on the ejector plate 21 can then eject the product 100 on the lower mold 33, and then prepare for the next injection molding.

[0087] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A sequential core-pulling injection mold, characterized in that: It includes a base plate (1), mold feet (2) disposed opposite to the side of the base plate (1), a movable template (3) mounted on the mold feet (2), a fixed template (4) pressed against the side of the movable template (3), a heat insulation plate (5) disposed on the side of the fixed template (4), a transition plate (6) disposed between the heat insulation plate (5) and the fixed template (4), and a push plate (20) and an ejector plate (21) disposed between the two mold feet (2); The moving template (3) is equipped with a lower mold (33) at one end facing the fixed template (4), and the fixed template (4) is equipped with an upper mold (34) at one end facing the moving template (3). A cylinder core-pulling assembly (11) is installed on one side of the fixed template (4) away from the moving template (3). The cylinder core-pulling assembly (11) passes through the fixed template (4) and is adapted to the upper mold (34) at one end facing the center of the fixed template. The moving template (3) is equipped with a slanted guide post core-pulling assembly (12) on one side facing the fixed template (4). The central axis of the slanted guide post core-pulling assembly (12) and the central axis of the cylinder core-pulling assembly (11) are coplanar in the vertical direction. The end of the slanted guide post core-pulling assembly (12) facing the lower mold (33) is equipped with a first insert (35). The moving template (3) is also equipped with a slanted guide post side pull assembly (13) on one side facing the fixed template (4), and a second insert (36) is installed on one end of the slanted guide post side pull assembly (13) facing the lower mold (33).

2. The sequential core-pulling injection mold as described in claim 1, characterized in that: A pouring sleeve (7) is installed on the side of the heat insulation board (5) away from the fixed template (4). A pouring pipe (9) is inserted on the side of the fixed template (4) facing the heat insulation board (5). Protective columns (8) are fixedly installed on the bottom end face of the base plate (1), the moving template (3), the fixed template (4), and the heat insulation board (5).

3. The sequential core-pulling injection mold as described in claim 1, characterized in that: A guide post (10) is fixedly installed on one end face of the heat insulation plate (5) facing the fixed template (4). A guide sleeve (14) is installed through the fixed template (4) and the moving template (3). A guide hole (19) is opened at the end of the mold foot (2).

4. The sequential core-pulling injection mold as described in claim 1, characterized in that: A first precision positioning block (17) is embedded on the side wall of the fixed template (4) near the moving template (3), and a second precision positioning block (18) is embedded on the side wall of the moving template (3) near the fixed template (4). The first precision positioning block (17) and the second precision positioning block (18) are respectively provided with mutually compatible positioning grooves or positioning protrusions on their opposite end faces.

5. A sequential core-pulling injection mold as described in claim 1, characterized in that: A locking assembly (29) is installed on the outer wall of the fixed template (4), a first insert rod (28) is installed on the outer wall of the heat insulation plate (5), and a second insert rod (31) is installed on the outer wall of the moving template (3). A first push block (281) is integrally provided at the end of the first insert rod (28), and a third push block (311) is integrally provided at the end of the second insert rod (31) at a right angle. The two ends of the first push block (281) along the length direction of the first insert rod (28) are provided with ramps, and the end of the third push block (311) away from the second insert rod (31) is also provided with a ramp.

6. A sequential core-pulling injection mold as described in claim 5, characterized in that: The locking assembly (29) includes a fixing plate (291) fixedly installed on the fixed template (4), a fixing block (292) fixed on the outer wall of the fixing plate (291), two lock holes (293) opened on the fixing block (292), a sliding groove (294) opened on the fixing block (292) connecting the two lock holes (293), a lock cylinder (295) sliding inside the sliding groove (294), and a top spring (297). The lock cylinder (295) is arranged in a U-shape. The two ends of the lock cylinder (295) facing the moving template (3) and close to the first insertion rod (28) are provided with inclined surfaces (296).

7. A sequential core-pulling injection mold as described in claim 1, characterized in that: The fixed template (4) is equipped with a reset spring assembly (32). The reset spring assembly (32) includes a delay rod (321) fixedly mounted on the transition plate (6) at one end and a through hole (322) opened on the fixed template (4) for the delay rod (321) to pass through. The diameter of the through hole (322) at the end away from the transition plate (6) is larger than the diameter at the end near the transition plate (6). The fixed template (4) also has a groove (323) connected to the through hole (322) on the end face facing the transition plate (6). A preload spring (324) is provided in the groove (323). A stop block is provided at the end of the delay rod (321) away from the transition plate (6). The diameter of the stop block is larger than the diameter of the through hole (322) at the end near the transition plate (6) and smaller than the diameter of the through hole (322) at the end away from the transition plate (6).

8. A sequential core-pulling injection mold as described in claim 1, characterized in that: The cylinder core-pulling assembly (11) includes a guide block (113) mounted on a fixed template (4) and a core-pulling insert (117) that penetrates the fixed template (4). A vertical block (111) is mounted on the end of the guide block (113), and a core-pulling cylinder (112) is mounted on the end face of the vertical block (111). The output shaft end of the core-pulling cylinder (112) penetrates the vertical block (111) and is connected to a traction block (114). A connecting groove (116) is opened at the end of the traction block (114), and the end of the core-pulling insert (117) is slidably disposed in the connecting groove (116). The cylinder core-pulling assembly (11) also includes a positioning base (118) fixed on the fixed template (4). The positioning base (118) has an oblique hole (119). The core-pulling insert (117) is disposed through the oblique hole (119). The outer wall of the core-pulling insert (117) is provided with a first plane arranged along its length direction. The inner wall of the oblique hole (119) is provided with a second plane arranged along its length direction. When the core-pulling insert (117) passes through the oblique hole (119), the first plane and the second plane are adapted to each other.

9. A sequential core-pulling injection mold as described in claim 1, characterized in that: The inclined guide post core-pulling assembly (12) includes a first slider base (126) fixedly installed on the moving template (3), a first slide block (123) slidably installed on the first slider base (126), a shovel base (121) fixedly installed on the fixed template (4) and facing the first slide block (123), a first inclined guide post (125) fixedly installed at the end of the shovel base (121), and a first through hole opened on the first slide block (123) for the first inclined guide post (124) to pass through; The first slide (123) is fixedly connected to the first insert (35) at one end facing the center of the moving template (3). The first slide (123) is equipped with a first cooling water channel (122), and the first cooling water channel (122) passes through the interior of the first insert (35).

10. A sequential core-pulling injection mold as described in claim 1, characterized in that: The inclined guide post side-pulling assembly (13) includes a bidirectional slider base (131) and a second slider base (132) mounted on the moving template (3), a second slide block (133) slidably disposed between the second slider base (132) and the bidirectional slider base (131), an inclined guide post fixing seat (136) fixed on the fixed template (4) and facing the second slide block (133), and a second inclined guide post (135) mounted on the inclined guide post fixing seat (136); The second slide (133) has a second through hole arranged along the length of the second inclined guide post (135). The second slide (133) has a second cooling water channel (134) installed inside, and the second cooling water channel (134) passes through the interior of the second insert (36).

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