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CN-121973403-A - Dual-mode core-pulling injection mold

CN121973403ACN 121973403 ACN121973403 ACN 121973403ACN-121973403-A

Abstract

The application relates to a dual-mode core-pulling injection mold which comprises an upper mold and a lower mold which are matched with each other, wherein the upper mold and the lower mold are symmetrically provided with a pair of cavities, and a synchronous core-pulling mechanism, a lateral core-pulling mechanism and an ejection mechanism are arranged between the upper mold and the lower mold. The synchronous core-pulling mechanism drives the synchronous core-pulling guide block to move through synchronous core-pulling driving, the inclined guide parts on two sides of the synchronous core-pulling mechanism drive the synchronous core-pulling block to realize synchronous composite inclined core-pulling of the double-mode cavity, the lateral core-pulling mechanism is matched with the end part for reversely pulling the core, and the ejection mechanism comprises a straight ejection mechanism and an inclined ejection mechanism, so that stable ejection and middle reversely-pulling demolding are respectively realized. The synchronous core-pulling mechanism, the lateral core-pulling mechanism and the ejection mechanism are respectively provided with an induction component and are electrically connected, so that linkage control is realized. The application has compact structure and good action synchronism, can adapt to the multi-directional core pulling and demoulding requirements of the plastic part with a complex structure, improves the molding precision, the running stability and the automation level of the plastic part, and reduces the failure rate.

Inventors

  • Ji Jiaohong
  • CHAI ZHENHAI

Assignees

  • 宁波吉海模具有限公司

Dates

Publication Date
20260505
Application Date
20260403

Claims (10)

  1. 1. The dual-mode core-pulling injection mold is characterized by comprising an upper mold and a lower mold which are mutually matched, wherein the upper mold and the lower mold are symmetrically provided with paired cavities by taking the central vertical plane as a symmetrical plane, a synchronous core-pulling mechanism (1) is arranged between the upper mold and the lower mold, the synchronous core-pulling mechanism (1) comprises a synchronous core-pulling drive (101), synchronous core-pulling guide blocks (102) are connected to the synchronous core-pulling drive (101), guide parts (102 a) are arranged on two sides of the synchronous core-pulling guide blocks (102) facing the cavities and are connected with synchronous core-pulling blocks (103) through the guide parts (102 a) in a sliding manner, the end parts of the synchronous core-pulling blocks (103) are deep into the cavities, the guide parts (102 a) are obliquely arranged, the guide parts (102 a) are inclined with included angles with the horizontal direction and the vertical direction, a side core-pulling mechanism (2) and an ejection mechanism (3) corresponding to the cavities are arranged between the upper mold and the lower mold, the side core-pulling mechanism (2) and the ejection mechanism (3) are arranged in pairs, a first induction component (4) is connected to the side core-pulling guide blocks (102), and the side core-pulling mechanism (2) is connected with a second induction component (5) and a third induction component (5) respectively.
  2. 2. The dual-mode core-pulling injection mold of claim 1, wherein the upper mold comprises an upper mold plate (6) and an upper mold core plate (7), the lower mold comprises a lower mold core plate (8), an ejector plate (9), a hot runner plate (10) and a lower mold plate (11), the shape of the upper mold core plate (7) corresponds to that of the cavity, a positioning slide block (801) is slidably connected to the lower mold core plate (8), the positioning slide block (801) is positioned on the outer side of the cavity, one side of the positioning slide block (801) close to the cavity is provided with a positioning convex part (801 a), the positioning convex part (801 a) is a plurality of positioning convex parts (801 a) with different sizes and positions, one side of the positioning slide block (801) away from the cavity is provided with an inclined plane and is connected with the upper mold core plate (7) through the inclined plane, and the upper mold core plate (7) is provided with a groove corresponding to the positioning convex part (801 a).
  3. 3. The dual-mode core-pulling injection mold of claim 2, wherein the lower mold core plate (8) is provided with a movable core (802) in a sliding manner, one side of the movable core (802) is matched with the shape of the cavity, the other side of the movable core (802) is provided with an inclined surface, the upper mold core plate (7) is provided with an inclined part corresponding to the upper inclined surface of the movable core (802), and the upper mold core plate (7) can push the movable core (802) to move towards a direction approaching to the cavity through the inclined part.
  4. 4. The dual-mode core-pulling injection mold of claim 1, wherein the synchronous core-pulling guide block (102) is a T-shaped block, the guide parts (102 a) are arranged on two sides of the synchronous core-pulling guide block (102), the guide parts (102 a) are T-shaped sliding grooves, the guide parts (102 a) are obliquely downwards arranged, and an included angle between the guide parts (102 a) and the length direction of the synchronous core-pulling guide block (102) is an acute angle.
  5. 5. The dual-mode core-pulling injection mold of claim 1, wherein the output end of the synchronous core-pulling drive (101) is provided with a T-shaped connecting block (101 a) and is connected with the lower end of the synchronous core-pulling guide block (102) through the T-shaped connecting block (101 a), two sides of the T-shaped connecting block (101 a) are provided with elastic guide blocks (101 b), the setting direction of the elastic guide blocks (101 b) is perpendicular to the direction of the T-shaped connecting block (101 a), and the contact surface of the elastic guide blocks (101 b) and the T-shaped connecting block (101 a) is an inclined surface.
  6. 6. The dual-mode core-pulling injection mold of claim 1, wherein the first induction component (4) comprises a first induction rod (401) arranged on the synchronous core-pulling guide block (102), a first induction switch (402) and a second induction switch (403) are arranged on the outer side of the lower mold, and the first induction switch (402) and the second induction switch (403) are respectively arranged on one of the upper side and the lower side of the first induction rod (401) and one of the left side and the right side of the first induction rod.
  7. 7. The dual-mode core-pulling injection mold of claim 1, wherein the lateral core-pulling mechanism (2) comprises a linear core-pulling component (201) and an oblique core-pulling component (202), the linear core-pulling component (201) and the oblique core-pulling component (202) are both connected with the second induction component (5), the second induction component (5) comprises a second induction rod (501), the second induction rod (501) is connected with a core-pulling block of the linear core-pulling component (201), a third induction switch (502) and a fourth induction switch (503) are arranged on the side face of the end part of the second induction rod (501), and the second induction rod (501) can be connected with the third induction switch (502) and the fourth induction switch (503).
  8. 8. The dual-mode core-pulling injection mold of claim 2, wherein the ejection mechanism (3) comprises a straight ejection mechanism (301) and an inclined ejection mechanism (302), the straight ejection mechanism (301) comprises a plurality of straight ejection rods (301 a), straight ejection core blocks matched with the mold cavities are arranged at the upper ends of the straight ejection rods (301 a), the lower ends of the straight ejection rods (301 a) are connected with the ejection plates (9), the inclined ejection mechanism (302) comprises a fixed block (302 a), inclined sliding grooves are formed in the fixed block (302 a) and are connected with sliding blocks (302 b) in the sliding grooves in a sliding mode, inclined ejection core blocks (302 c) are rotatably connected to the sliding blocks (302 b), inclined ejection core blocks matched with the mold cavities are arranged at the upper ends of the inclined ejection rods (302 c), and waist-shaped through holes are formed in positions of the lower model core plates (8) and the ejection plates (9) corresponding to the inclined ejection rods (302 c).
  9. 9. The dual-mode core-pulling injection mold of claim 8, wherein the inclined ejector core block is provided with an avoidance through hole for the straight ejector rod (301 a) to pass through, and the avoidance through hole is a kidney-shaped hole.
  10. 10. The dual-mode core-pulling injection mold of claim 8, wherein the ejector plate (9) comprises a first ejector plate (901) and a second ejector plate (902), the first ejector plate (901) and the second ejector plate (902) are respectively connected with the straight ejection mechanism (301) and the inclined ejection mechanism (302), the third induction assembly comprises a third induction rod, a fifth induction switch and a sixth induction switch, the third induction rod is connected to the first ejector plate (901), and the fifth induction switch and the sixth induction switch are respectively arranged on the lower mold core plate (8) and the lower mold plate (11).

Description

Dual-mode core-pulling injection mold Technical Field The application relates to the technical field of molds, in particular to a dual-mode core-pulling injection mold. Background Injection molding is one of the most widely applied molding processes in the production of plastic parts at present, and the large-scale injection mold is mainly applied to the mass production of large-size and large-projection-area plastic products such as automobile inner and outer decorations, household appliance shells, logistics turnover boxes and the like, and along with the continuous improvement of the requirements of industrial manufacturing on the dimensional precision, the surface quality, the production efficiency and the molding stability of the large-scale injection mold, the requirements on the large-scale injection mold are also higher and higher. For the injection molding piece that has complicated structures such as back-off, hem and through-hole simultaneously, traditional injection mold generally need set up independent loose core or ejection mechanism respectively for every structure, and this kind of mode exists that the mould structure is complicated, spare part is many, the motion is asynchronous scheduling problem, leads to the product to draw to hinder, warp easily to the direction of loosing core is limited, can't adapt to the drawing of patterns demand of special angle well, and multi-cavity mould's synchronism and stability are also relatively poor, and present injection mold can set up dual-cavity structure in general moreover, leads to the drawing of patterns more complicated. In the prior art, a plurality of structures capable of simultaneously pulling cores of the dual-mode cavity exist, for example, the Chinese patent with the publication number of CN110450358B is published for 2021, 9 months and 21 days, an injection mold with a dual-core pulling structure is disclosed, the injection mold comprises a mold body composed of a fixed mold and a movable mold, a first cavity and a second cavity which are bilaterally symmetrical are arranged in the mold body, a first core pulling structure and a second core pulling structure are arranged on the mold body, in a mold opening state, the third slide block synchronously drives the first slide block and the second slide block to slide, the first slide block simultaneously slides inwards along a first raised strip and slides along the moving direction of the third slide block, and the second slide block simultaneously slides inwards along a second raised strip and slides along the moving direction of the third slide block. However, the first core-pulling structure and the second core-pulling structure in the application can only core-pull the core in the same plane, and the defects of poor adaptability and insufficient synchronism still exist for complex structural members with special angles, so that a dual-mode core-pulling injection mold capable of realizing oblique core-pulling with special angles needs to be designed. Disclosure of Invention The application provides a dual-mode core-pulling injection mold capable of realizing oblique core pulling at a special angle. The application provides a dual-mode core-pulling injection mold, which adopts the following technical scheme: The utility model provides a bimodulus injection mold of loosing core, includes the last mould and the lower mould that mutually support and set up, goes up mould and lower mould and use its center perpendicular to be the symmetry to be provided with the die cavity in pairs with the symmetry, go up and be provided with synchronous core-pulling mechanism between mould and the lower mould, synchronous core-pulling mechanism is including synchronous core-pulling drive, synchronous core-pulling drive is last to be connected with synchronous core-pulling guide block, synchronous core-pulling guide block all is provided with the guide part and has synchronous core-pulling block through guide part sliding connection towards the both sides of die cavity, synchronous core-pulling block's tip is in the die cavity in depth, the guide part is for the slope setting and guide part all is provided with the contained angle with horizontal direction and vertical direction, go up still be provided with between mould and the lower mould with lateral core-pulling mechanism and ejection mechanism that the die cavity corresponds are in pairs setting, be connected with first response subassembly on the synchronous core-pulling guide block, lateral core-pulling mechanism with be connected with second response subassembly and third response subassembly on the ejection mechanism respectively, electric connection between first response subassembly, second response subassembly and the third response subassembly. Preferably, the upper die comprises an upper die plate and an upper die core plate, the lower die comprises a lower die core plate, an ejector plate, a hot runner plate and a lower die plate, the shape o