A cross-type secondary core-pulling mold

Abstract

The present invention relates to the field of mold technology, and discloses a cross-type secondary core-pulling mold, comprising a movable mold, a fixed mold and a core-pulling assembly, wherein the movable mold and the fixed mold are relatively arranged to form a molding cavity, and the core-pulling assembly comprises a driving device, a slide seat, a first core-pulling unit and a second core-pulling unit, the output shaft of the driving device is connected to the slide seat, the first core-pulling unit comprises a first sliding core and a vertically arranged slider, the second core-pulling unit comprises a sliding core fixing plate and a second sliding core, the sliding core fixing plate is located on the side of the slide seat close to the molding cavity, one end of the first sliding core movably penetrates the sliding core fixing plate and is connected to the slide seat, the other end of the first sliding core is fixed with a lifting plate inclined upward, the slider is slidably connected to the lifting plate, the second sliding core is fixed on the side of the sliding core fixing plate away from the slide seat, the sliding core fixing plate is movably blocked with the slide seat, the present invention uses a set of core-pulling assemblies to successively complete vertical and horizontal core-pulling actions, simplifies the core-pulling structure, and reduces the mold opening cost.

Description

Technical Field

[0001] The invention relates to the technical field of moulds, in particular to a cross-type secondary core-pulling mould. Background Art

[0002] At present, the scope of mold application is becoming more and more extensive, and people's requirements for mold production process technology are becoming higher and higher. There are many ways to realize mold processing, among which the core-pulling mold processing method is also increasingly widely used. The mold can simply and quickly prepare plastic products of various shapes through injection molding. When it is necessary to produce a product with holes in both the X and Y directions, the most commonly used method for designing such a mold is to pull the core through the template in one direction and drive the core through the cylinder in the other direction. The core pulling setting in two directions involves more parts, which is bound to lead to a larger mold volume, and will also increase the manufacturing cost of the mold; in addition, for cross core pulling, a set of mechanisms that ensure the sequence of the opening and closing of the template and the core pulling of the cylinder need to be added during the design, and the mechanism accuracy requirements are high, otherwise it is easy to cause the slide to be damaged, the structural failure rate is high, and the maintenance is difficult, thereby affecting the service life of the mold, affecting production, greatly increasing the production cost, and greatly increasing the maintenance cost of the mold. Two sets of core pulling mechanisms are required. Summary of the invention

[0003] Therefore, it is necessary to provide a cross-type secondary core-pulling mold to solve the problems of complex structure, high manufacturing cost and poor stability of the existing cross-type core-pulling mold.

[0004] To achieve the above-mentioned purpose, the present invention provides a cross-type secondary core-pulling mold, characterized in that it includes a movable mold, a fixed mold and a core-pulling assembly, the movable mold is located above the fixed mold, the movable mold and the fixed mold are relatively arranged to form a molding cavity, the core-pulling assembly includes a driving device, a slide, a first core-pulling unit and a second core-pulling unit, the output shaft of the driving device is connected to the slide, the slide is slidably arranged on the side of the molding cavity, the first core-pulling unit includes a first sliding core and a vertically arranged slider, the second core-pulling unit includes a sliding core fixing plate and a second sliding core, the sliding core fixing plate is located on the side of the slide close to the molding cavity, one end of the first sliding core movably passes through the sliding core fixing plate and is connected to the slide, the other end of the first sliding core is fixed with a lifting plate inclined upward, the slider is slidably connected to the lifting plate, the second sliding core is fixed on the side of the sliding core fixing plate away from the slide, and the sliding core fixing plate is movably blocked with the slide.

[0005] Furthermore, the bottom of the slider moves through the second slider core, the first slider core is located in the second slider core, and the second slider core is vertically provided with a slot, a clip strip is fixed on the side of the slider, and the slot and the clip strip cooperate with each other. The cooperation of the slot and the clip strip restricts the first slider core from directly driving the slider to move horizontally, so that the lifting plate lifts the slider when sliding, so that the slider slides in the vertical direction, completing the core pulling in the vertical direction.

[0006] The top surface of the sliding plate is provided with an inclined extrusion surface, and the side edge of the pushing block is provided with an inclined mating surface, and the extrusion surface matches the inclined surface.

[0007] The function of the extrusion push unit is to push and reset the second core pulling unit. When the extrusion push unit follows the slide seat and slides a certain distance, it enters the sliding channel, and the push block is squeezed and contracted into the extrusion groove. At this time, the extension plate falls into the gap. There is a vertical height difference between the gap and the sliding core fixing plate, so that after the extension plate falls into the gap, it blocks and connects with the sliding core fixing plate. When the slide seat slides toward the molding cavity, the extension plate can push the second core pulling assembly to reset. After the extrusion push unit slides out of the sliding channel, the extension plate moves up to cancel the pushing effect on the second core pulling assembly, and then the slide seat continues to push the first core pulling unit to slide in the molding cavity. The inclined extrusion surface facilitates the sliding channel to extrude the push block into the extrusion groove.

[0008] Furthermore, a horizontal limit rod is fixed on the side of the sliding core fixing plate close to the sliding seat, and the limit rod is extended along the sliding direction of the first sliding core. A limit channel is opened on the side of the sliding seat close to the sliding core fixing plate, and the limit rod moves through the limit channel. A movable baffle is fixed on the end of the limit rod away from the sliding core fixing plate, and the diameter of the movable baffle is D1. The opening diameter of the limit channel close to the sliding core fixing plate is D2, and D1 is larger than D2. The sliding seat slides outward, and when the opening of the limit channel reaches the end of the limit rod, the movable baffle is blocked and connected with the opening of the limit channel, so that the sliding seat drives the second core pulling assembly to perform the core pulling action.

[0009] Furthermore, the core pulling assembly further includes a transmission unit, which includes a transmission slide and a connecting block, a slide rail is obliquely arranged on the upper surface of the transmission slide, the connecting block is slidably arranged on the slide rail, the slide seat is fixed on the side of the connecting block, and the output shaft of the driving device is connected to the transmission slide. Since the slide rail is obliquely arranged, the pushing direction of the output shaft of the driving device is perpendicular to the sliding direction of the slide seat, so the driving device can be arranged on the side of the transmission slide to avoid the driving device occupying too much lateral space of the mold.

[0010] Furthermore, a limiting convex strip is fixed to one end of the slide rail away from the driving device, and the limiting convex strip is fixed to the transmission slide plate. The limiting convex strip is used to engage with the slide seat to limit the travel of the driving device.

[0011] Furthermore, the core pulling assembly also includes an extrusion limiting unit, and the upper surface of the slide is provided with an extrusion limiting groove and a locking groove in parallel, and the locking groove is located on the side of the slide close to the sliding core fixing plate, and the extrusion limiting unit includes a limiting block and a limiting elastic member, and the limiting elastic member is fixed on the upper surface of the limiting block, and the limiting elastic member is connected to the movable mold, and the lower surface of the limiting block is fixed with a locking protrusion and an extrusion protrusion, and the locking protrusion and the extrusion protrusion correspond to the locking groove and the extrusion limiting groove respectively, and the sides of the locking groove and the extrusion limiting groove are inclined surfaces.

[0012] The horizontal plane of the bottom surface of the locking groove is lower than the top surface of the sliding core fixing plate. When the locking protrusion is in the locking groove, it presses against the sliding core fixing plate to prevent the movement of the second core pulling unit. When the slide seat slides to make the extrusion protrusion ejected from the extrusion limit groove, the limit block pushes upward, and the locking protrusion releases the blocking of the second core pulling assembly. The second core pulling assembly performs the core pulling action driven by the slide seat.

[0013] Furthermore, a fixing rod is fixed on the side of the sliding core fixing plate close to the molding cavity, and the fixing rod is extended along the sliding direction of the second sliding core. The second sliding core is provided with a fixing hole, and the fixing rod corresponds to the position of the fixing hole. The fixing rod extends into the fixing hole, and the fixing rod is used to play a good limiting role on the fixing hole, and the fixing rod can also strengthen the rigidity of the second sliding core.

[0014] Furthermore, two limit fixing plates are included, and the two limit fixing plates are respectively located on the two opposite sides of the slide. The interval between the two limit fixing plates forms a space, connecting the sliding channel and the molding cavity, which is used to play a certain role in limiting the sliding path of the slide, ensuring the stable operation of the core pulling action.

[0015] Furthermore, the number of the core pulling assemblies is two, and the two core pulling assemblies are respectively located on two opposite sides of the molding cavity.

[0016] The above technical solution has the following beneficial effects:

[0017] In the present invention, the first sliding core can slide in the horizontal direction through the driving device, and the lifting plate drives the sliding block to move upward when sliding, and then the sliding seat pulls the second core pulling unit through the limiting pull rod to complete the core pulling in the horizontal direction, and the vertical core pulling and horizontal core pulling actions are completed in succession through the same core pulling assembly, and there is no need to set a core pulling assembly for each core pulling direction, which simplifies the core pulling structure, reduces the parts of the slider core pulling structure, reduces the workload, saves the mold design space, and greatly reduces the mold opening cost. At the same time, since the sliding core fixing plate and the sliding seat are movably blocked, after the first sliding core follows the sliding seat to slide a certain distance, the sliding seat drives the second core pulling assembly to move, which solves the problem of the core pulling sequence of the first sliding core and the second sliding core. It has a simple structure and is easy to install, which can effectively reduce the failure rate of the mold and reduce the difficulty of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the mold described in the specific implementation method.

[0019] Figure 2 It is a stereoscopic view of the core pulling assembly described in the specific implementation manner.

[0020] Figure 3 It is an exploded view of the core pulling assembly described in the specific implementation method.

[0021] Figure 4 It is a stereoscopic diagram of the connection block described in the specific implementation manner.

[0022] Figure 5 It is a three-dimensional diagram of the slide seat described in the specific implementation method.

[0023] Figure 6 It is a structural diagram of the first core pulling unit and the second core pulling unit in a specific implementation manner.

[0024] Figure 7 It is a cross-sectional view of the extrusion limiting unit along its center line according to the specific implementation method.

[0025] Figure 8 It is a cross-sectional view of the extrusion and pushing unit along its center line according to a specific implementation method.

[0026] Fig. 9 It is a cross-sectional view of the mold described in the specific implementation method.

[0027] Description of reference numerals:

[0028] 1. Moving mold;

[0029] 2. Fix the mold;

[0030] 3. Core pulling assembly; 31. Driving device;

[0031] 32. Transmission unit; 321. Transmission slide plate; 322. Connecting block; 323. Slide rail; 324. Position limiting convex strip; 325. Slide groove;

[0032] 33, slide seat; 331, extrusion groove; 332, notch; 333, positioning groove; 334, extrusion limiting groove; 335, limiting channel;

[0033] 34, first core pulling unit; 341, first sliding core; 342, lifting plate; 343, sliding block; 344, clamping strip;

[0034] 35, second core pulling unit; 351, sliding core fixing plate; 352, second sliding core; 353, slot; 354, fixing rod; 355, limiting pull rod; 356, movable baffle;

[0035] 36. Extrusion push unit; 361. Push block; 362. Extrusion elastic member; 363. Extension plate;

[0036] 37. guide slide seat; 371. sliding channel; 372. extrusion surface;

[0037] 38. Extrusion limiting unit; 381. Limiting block; 382. Limiting elastic member; 383. Positioning protrusion; 384. Extrusion protrusion;

[0038] 39. Limit fixing plate;

[0039] 4. Molding cavity. DETAILED DESCRIPTION

[0040] In order to explain the technical content, structural features, achieved objectives and effects of the technical solution in detail, the following is a detailed description in conjunction with specific embodiments and accompanying drawings.

[0041] See also Figure 1-9 The present embodiment discloses a cross-type secondary core-pulling mold, including a movable mold 1, a fixed mold 2 and a core-pulling assembly 3. The movable mold 1 is located above the fixed mold 2. The movable mold 1 and the fixed mold 2 are relatively arranged to form a molding cavity 4. A lifting rod can be arranged between the fixed mold 2 and the movable mold 1. A lifting cylinder can also be fixed on the movable mold 1 or the fixed mold 2. The lifting cylinder and the lifting rod complete the mold opening and closing actions between the movable mold 1 and the fixed mold 2.

[0042] In this embodiment, there are two core pulling assemblies 3, and the two core pulling assemblies 3 are respectively located on two opposite sides of the molding cavity 4. The two opposite sides of the plastic product after injection molding have holes in both horizontal and vertical directions.

[0043] The core pulling assembly 3 includes a driving device 31 , a transmission unit 32 , a slide 33 , a first core pulling unit 34 , a second core pulling unit 35 , an extrusion pushing unit 36 ​​, a guide slide 3733 and an extrusion limiting unit 38 .

[0044] The output shaft of the driving device 31 is connected to the slide 33 through the transmission unit 32. The slide 33 is slidably arranged on the side of the molding cavity 4. In this embodiment, the transmission unit 32 includes a transmission slide 321 and a connecting block 322. The upper surface of the transmission slide 321 is inclinedly provided with a slide rail 323. The connecting block 322 is slidably arranged on the slide rail 323. Specifically, the bottom surface of the connecting block 322 is provided with an inclined slide groove 325 corresponding to the slide rail 323. The slide 33 is fixed on the side of the connecting block 322. The output shaft of the driving device 31 is connected to the transmission slide 321. Since the slide rail 323 is inclined, the pushing direction of the output shaft of the driving device 31 is perpendicular to the sliding direction of the slide 33. Therefore, the driving device 31 can be arranged on the side of the transmission slide 321 to prevent the driving device 31 from occupying too much lateral space of the mold. The driving device 31 is a driving oil cylinder or a driving cylinder. A limiting convex strip 324 is fixed to one end of the slide rail 323 away from the driving device 31, and the limiting convex strip 324 is fixed to the transmission slide plate 321. The limiting convex strip 324 is used to block with the slide seat 33 to limit the stroke of the driving device 31.

[0045] The first core pulling unit 34 includes a first sliding core 341 and a vertically arranged slider 343, and the second core pulling unit 35 includes a sliding core fixing plate 351 and a second sliding core 352. The sliding core fixing plate 351 is located on the side of the slide seat 33 close to the molding cavity 4, one end of the first sliding core 341 movably passes through the sliding core fixing plate 351 and is connected to the slide seat 33, and the other end of the first sliding core 341 is fixed with a lifting plate 342 inclined upward, the slider 343 is slidably connected to the lifting plate 342, and the second sliding core 352 is fixed on the side of the sliding core fixing plate 351 away from the slide seat 33, and the sliding core fixing plate 351 is movably blocked with the slide seat 33. The bottom of the slider 343 movably passes through the second slide core 352, the first slide core 341 is located in the second slide core 352, and the second slide core 352 is vertically provided with a slot 353, and a clip strip 344 is fixed on the side of the slider 343, and the slot 353 and the clip strip 344 cooperate with each other. The cooperation of the slot 353 and the clip strip 344 restricts the first slide core 341 from directly driving the slider 343 to move horizontally, so that the lifting plate 342 lifts the slider 343 when sliding, so that the slider 343 slides in the vertical direction, completing the core pulling in the vertical direction.

[0046] In this embodiment, the bottom of the slider 343 movably passes through the second slider core 352, and the first slider core 341 is located in the second slider core 352. The slider 343 is used to form a vertical hole on the molded plastic product, and the second slider core 352 is used to form a vertical hole on the molded plastic product.

[0047] A horizontal limit rod 355 is fixed on the side of the slide core fixing plate 351 close to the slide seat 33. The limit rod 355 is extended along the sliding direction of the first slide core 341. A limit channel 335 is provided on the side of the slide seat 33 close to the slide core fixing plate 351. The limit rod 355 moves through the limit channel 335. A movable baffle 356 is fixed on the end of the limit rod 355 away from the slide core fixing plate 351. The diameter of the movable baffle 356 is D1. The opening diameter of the limit channel 335 close to the slide core fixing plate 351 is D2, and D1 is greater than D2. The slide seat 33 slides outward. When the opening of the limit channel 335 reaches the end of the limit rod 355, the movable baffle 356 blocks the opening of the limit channel 335, so that the slide seat 33 drives the second core pulling assembly 3 to perform the core pulling action.

[0048] In this embodiment, one slide seat 33 corresponds to one extrusion limiting unit 38 and two extrusion pushing units 36 , and the two extrusion pushing units 36 are respectively located on both sides of the extrusion limiting unit 38 .

[0049] The guide slide 3733 is provided with a sliding channel 371, the slide 33 moves through the sliding channel 371, the upper surface of the slide 33 is provided with an extrusion groove 331, the extrusion push unit 36 ​​includes a push block 361 and an extrusion elastic member 362, the extrusion elastic member 362 is fixed in the extrusion groove 331, the push block 361 is fixed on the extrusion elastic member 362, the push block 361 protrudes from the upper surface of the slide 33, the top end of the sliding channel 371 is closed, the top end of the sliding channel 371 squeezes the push block 361 so that the push block 361 shrinks into the extrusion groove 331, and the extrusion push unit 36 ​​includes a push block 361 and an extrusion elastic member 362, the extrusion elastic member 362 is fixed in the extrusion groove 331, the push block 361 is fixed on the extrusion elastic member 362, the push block 361 protrudes from the upper surface of the slide 33, and the top end of the sliding channel 371 squeezes the push block 361 so that the push block 361 shrinks into the extrusion groove 331, and the extrusion push unit 36 ​​includes a push block 361 and an extrusion elastic member 362. A notch 332 is provided on the side of the pressing groove 331 close to the sliding core fixing plate 351, and an extension plate 363 is fixed on the side of the pushing block 361 close to the sliding core fixing plate 351, and the extension plate 363 is adapted to the notch 332. The extension plate 363 is configured to block and engage with the side of the sliding core fixing plate 351 when the pushing block 361 is squeezed, and an inclined extrusion surface 372 is provided on the top surface of one end of the sliding channel 371 close to the sliding seat 33, and an inclined matching surface is provided on the side of the pushing block 361 close to the sliding channel 371, and the extrusion surface 372 matches the inclined surface. The function of the extrusion push unit 36 ​​is to push and reset the second core pulling unit 35 to a certain extent. When the extrusion push unit 36 ​​follows the slide 33 and slides a certain distance, it enters the sliding channel 371, and the push block is squeezed and contracted into the extrusion groove 331. At this time, the extension plate 363 falls into the notch 332. There is a vertical height difference between the notch 332 and the sliding core fixing plate 351, so that after the extension plate 363 falls into the notch 332, it blocks and contacts the sliding core fixing plate 351. When the slide 33 slides toward the molding cavity 4, the extension plate 363 can push the second core pulling assembly 3 to reset. After the extrusion push unit 36 ​​slides out of the sliding channel 371, the extension plate 363 moves up, canceling the pushing effect on the second core pulling assembly 3, and then the slide 33 continues to push the first core pulling unit 34 to slide in the molding cavity 4. The inclined extrusion surface 372 facilitates the sliding channel 371 to squeeze the push block 361 into the extrusion groove 331.

[0050] The upper surface of the slide 33 is provided with an extrusion limit groove 334 and a locking groove 333 in parallel. The locking groove 333 is located on the side of the slide 33 close to the slide core fixing plate 351. The extrusion limit unit 38 includes a limit block 381 and a limit elastic member 382. The limit elastic member 382 is fixed on the upper surface of the limit block 381. The limit elastic member 382 is connected to the movable mold 1. The lower surface of the limit block 381 is fixed with a locking protrusion 383 and an extrusion protrusion 384. The locking protrusion 383 and the extrusion protrusion 384 correspond to the locking groove 333 and the extrusion limit groove 334 respectively. The sides of the locking groove 333 and the extrusion limit groove 334 are inclined surfaces. The horizontal plane of the bottom surface of the locking groove 333 is lower than the top surface of the sliding core fixing plate 351. When the locking protrusion 383 is located in the locking groove 333, it presses against the sliding core fixing plate 351 to prevent the movement of the second core pulling unit 35. When the slide seat 33 slides to make the extrusion protrusion 384 pop out of the extrusion limit groove 334, the limit block 381 pushes upward, and the locking protrusion 383 releases the blocking of the second core pulling assembly 3. The second core pulling assembly 3 performs the core pulling action under the drive of the slide seat 33.

[0051] In this embodiment, both the extrusion elastic member 362 and the limiting elastic member 382 are springs.

[0052] The sliding core fixing plate 351 and the second sliding core 352 are fixed by bolt fasteners. A fixing rod 354 is fixed on the side of the sliding core fixing plate 351 close to the molding cavity 4. The fixing rod 354 is extended along the sliding direction of the second sliding core 352. The second sliding core 352 is provided with a fixing hole, and the fixing rod 354 corresponds to the position of the fixing hole. The fixing rod 354 extends into the fixing hole, and the fixing rod 354 is used to play a good limiting role on the fixing hole. At the same time, the fixing rod 354 can strengthen the rigidity of the second sliding core 352.

[0053] It also includes two limit fixing plates 39, which are respectively located on two opposite sides of the slide 33. The interval between the two limit fixing plates 39 forms a space, connecting the sliding channel 371 and the molding cavity 4, which is used to limit the sliding path of the slide 33 to a certain extent, ensuring the stable operation of the core pulling action.

[0054] The use process of this embodiment includes the following steps:

[0055] 1. In the mold closing state, the second slide core 352 is located in the molding cavity 4 to form a horizontal hole on the plastic product, and the slider 343 vertically passes through the second slide core 352 to form a vertical hole on the plastic product. At this time, the positioning protrusion 383 of the limit block 381 is located in the positioning groove 333, supporting the slide core fixing plate 351;

[0056] 2. When the mold is opened, the driving device 31 drives the transmission slide plate 321 to slide through the output shaft. At this time, since the slide rail 323 is inclined, the slide seat 33 slides out along the sliding channel 371, and the slide seat 33 drives the first slide core 341 to slide out. The slide block 343 is pulled out upward due to the action of the stopper and the inclined lifting plate 342;

[0057] 3. When the slide seat 33 drives the first slide core 341 to slide out, the open end of the limit channel 335 gradually moves toward the movable baffle 356 at the end of the limit pull rod 355, the extrusion push unit 36 ​​enters the sliding channel 371, the push block 361 is squeezed and completely retracted in the extrusion groove 331, and the limit block 381 is gradually lifted up;

[0058] 4. After the slider 343 completes the core pulling in the vertical direction, the movable baffle 356 at the end of the limiting pull rod 355 is blocked with the open end of the limiting channel 335, and the locking protrusion 383 is completely lifted up and disengaged from the locking groove 333. The locking protrusion 383 no longer blocks the sliding core fixing plate 351, and the extension plate 363 of the push block 361 falls into the notch 332. The slide seat 33 pulls the second core pulling unit 35 and the first core pulling unit 34 to slide together through the action of the limiting pull rod 355, completing the core pulling action of the second sliding core 352;

[0059] 5. After the core pulling is completed, the movable mold 1 and the fixed mold 2 are opened to take out the plastic product, and the movable mold 1 and the fixed mold 2 are closed again, and the core pulling assembly 3 is reset. When the core pulling assembly 3 is reset, the driving device 31 drives the slide 33 to move inward, and the slide 33 moves inward, driving the first core pulling assembly 3 to move inward. At this time, the extension block falls into the notch 332, and the extension block supports the slide core fixing plate 351, so the second core pulling assembly 3 also slides into the molding cavity 4.

[0060] 6. When the push block 361 slides out of the sliding channel 371, the extrusion elastic member 362 pushes up the push block 361, and the extension block also moves up with the push block 361. At this time, the second slide core 352 has completed the reset, and then the slide seat 33 drives the first slide core 341 to slide into the molding cavity 4. Due to the setting of the inclined lifting plate 342, the slider 343 moves downward, and the bottom end passes through the second slide core 352, completing the reset of the core pulling assembly 3.

[0061] This embodiment uses a set of core pulling components 3 to complete vertical and horizontal core pulling actions in sequence, simplifies the core pulling structure, reduces the parts of the core pulling structure of the slider 343, reduces the workload, saves mold design space, and greatly reduces the mold opening cost.

[0062] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "include..." or "comprise..." do not exclude the existence of other elements in the process, method, article or terminal device including the elements. In addition, in this article, "greater than", "less than", "exceed" and the like are understood to exclude the number itself; "above", "below", "within" and the like are understood to include the number itself.

[0063] Although the above embodiments have been described, once those skilled in the art know the basic creative concepts, they can make additional changes and modifications to these embodiments. Therefore, the above description is only an embodiment of the present invention and does not limit the patent protection scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A cross-type secondary core-pulling mold, characterized in that: The invention comprises a movable mold, a fixed mold and a core pulling assembly, wherein the movable mold is located above the fixed mold, and the movable mold and the fixed mold are relatively arranged to form a molding cavity, and the core pulling assembly comprises a driving device, a slide seat, a first core pulling unit and a second core pulling unit, the output shaft of the driving device is connected to the slide seat, the slide seat is slidably arranged on the side of the molding cavity, the first core pulling unit comprises a first sliding core and a vertically arranged slider, the second core pulling unit comprises a sliding core fixing plate and a second sliding core, the sliding core fixing plate is located on the side of the slide seat close to the molding cavity, one end of the first sliding core movably passes through the sliding core fixing plate and is connected to the slide seat, the other end of the first sliding core is fixed with a lifting plate inclined upward, the slider is slidably connected to the lifting plate, the second sliding core is fixed on the side of the sliding core fixing plate away from the slide seat, and the sliding core fixing plate is movably blocked with the slide seat; The top surface of the sliding plate is provided with an inclined extrusion surface, and the side edge of the pushing block is provided with an inclined mating surface, and the extrusion surface matches the inclined surface; A horizontal limit rod is fixed on the side of the sliding core fixing plate close to the sliding seat, and the limit rod is extended along the sliding direction of the first sliding core. A limit channel is provided on the side of the sliding seat close to the sliding core fixing plate, and the limit rod moves through the limit channel. A movable baffle is fixed on the end of the limit rod away from the sliding core fixing plate, and the diameter of the movable baffle is D1. The opening diameter of the limit channel close to the sliding core fixing plate is D2, and D1 is larger than D2. The core pulling assembly also includes a transmission unit, which includes a transmission slide and a connecting block. A slide rail is obliquely arranged on the upper surface of the transmission slide, the connecting block is slidably arranged on the slide rail, the slide seat is fixed on the side of the connecting block, and the output shaft of the driving device is connected to the transmission slide; When the mold is opened, the driving device drives the transmission slide plate to slide through the output shaft. At this time, due to the inclined setting of the slide rail, the slide seat slides out along the sliding channel, and the slide seat drives the first slide core to slide out. The slide block is pulled out upward due to the action of the stopper and the inclined lifting plate. When the sliding seat drives the first sliding core to slide out, the open end of the limiting channel gradually moves toward the movable baffle at the end of the limiting pull rod, the extrusion push unit enters the sliding channel, the push block is squeezed and completely retracted in the extrusion groove, and the limiting block is gradually lifted up; after the slider completes the core pulling in the vertical direction, the movable baffle at the end of the limiting pull rod is blocked and connected with the open end of the limiting channel, the locking protrusion is completely lifted up and disengaged from the locking groove, the locking protrusion no longer blocks the sliding core fixing plate, the extension plate of the push block falls into the notch, and the sliding seat pulls the second core pulling unit and the first core pulling unit to slide together through the action of the limiting pull rod, completing the core pulling action of the second sliding core; The core pulling assembly also includes an extrusion limiting unit, and the upper surface of the slide is provided with an extrusion limiting groove and a locking groove in parallel, and the locking groove is located on the side of the slide close to the sliding core fixing plate, and the extrusion limiting unit includes a limiting block and a limiting elastic member, and the limiting elastic member is fixed on the upper surface of the limiting block, and the limiting elastic member is connected to the movable mold, and a locking protrusion and an extrusion protrusion are fixed on the lower surface of the limiting block, and the locking protrusion and the extrusion protrusion correspond to the locking groove and the extrusion limiting groove respectively, and the sides of the locking groove and the extrusion limiting groove are inclined surfaces.

2. The mold according to claim 1, characterized in that The bottom of the slider movably passes through the second slider core, the first slider core is located in the second slider core, a card slot is vertically arranged in the second slider core, a card strip is fixed on the side of the slider, and the card slot and the card strip match each other.

3. The mold according to claim 1, characterized in that A limiting convex strip is fixed to one end of the slide rail away from the driving device, and the limiting convex strip is fixed on the transmission slide plate.

4. The mold according to claim 1, characterized in that A fixing rod is fixed on the side of the sliding core fixing plate close to the molding cavity. The fixing rod is extended along the sliding direction of the second sliding core. A fixing hole is provided on the second sliding core. The fixing rod corresponds to the fixing hole.

5. The mold according to claim 1, characterized in that It also includes two limit fixing plates, which are respectively located on two opposite sides of the slide seat.

6. The mold according to claim 1, characterized in that The number of the core pulling assemblies is two, and the two core pulling assemblies are respectively located on two opposite sides of the molding cavity.

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