Search

CN-122008487-A - Auto parts injection mold with structure of moulding plastics fast

CN122008487ACN 122008487 ACN122008487 ACN 122008487ACN-122008487-A

Abstract

The invention relates to the technical field of injection molds and discloses an automobile part injection mold with a rapid injection structure, which comprises a guide rod, a fixed mold clamped outside the guide rod, a movable mold connected outside the guide rod in a sliding way, a shell arranged outside the movable mold, a limiting piece positioned in an isolation unit at the beginning and attached to the inside of the isolation unit, a limiting piece positioned at the set position and attached to the isolation plate, and a thimble device moving intermittently and gradually increasing in distance through the isolation unit and finally moving in a long distance through the isolation plate. The short stroke and middle stroke pretreatment is formed through the thickness difference of the first block and the second block, long-distance ejection is finally realized by means of the rigid support of the baffle plate, and the stop lever and the thimble device synchronously move at a uniform speed, so that the problem of warp deformation caused by uneven stress of a part made of a complex curved surface and soft materials during demolding is effectively solved, the rejection rate of warp, top crack and the like is obviously reduced, the ineffective loss of reworking and production repairing is reduced, and the effective output ratio is improved.

Inventors

  • HU WEIMIN

Assignees

  • 浙江星泰模塑科技股份有限公司

Dates

Publication Date
20260512
Application Date
20260409

Claims (10)

  1. 1. The automobile part injection mold with the rapid injection structure comprises a guide rod (1) and is characterized by further comprising a fixed mold (2) clamped outside the guide rod (1), a movable mold (3) which is connected outside the guide rod (1) in a sliding mode, a shell (4) arranged outside the movable mold (3), a baffle plate (5) fixedly connected with the guide rod (1), a thimble device (6) which is connected with the movable mold (3) in a sliding mode, a rotating needle part (7) which is provided with two baffle units (9) which are connected with the thimble device (6) in a rotating mode, a baffle unit (9) which is provided with two baffle units (9) which are connected with the guide rod (1) in a sliding mode, and a connecting frame (10) which is fixedly connected with the thimble device (6), wherein the two rotating needle parts (7), the limiting parts (8) and the baffle unit (9) are symmetrical relative to the central axis of the movable mold (3), the two limiting parts (8) are connected with the connecting frame (10), the limiting parts (8) comprise an initial position and a setting position, and the limiting parts (8) are positioned in the inner position of the baffle unit (6) and gradually fit with each other when the two baffle units (8) are positioned in the inner position and the baffle unit (6) in a gradually-increasing mode, finally, a long-distance movement is produced by means of the baffle plate (5).
  2. 2. The automobile part injection mold with the rapid injection structure according to claim 1, wherein a plurality of guide blocks (41) are arranged in the shell (4), the blocking unit (9) is slidably connected in the guide blocks (41), the blocking unit (9) is divided into a secondary block (91) and a primary block (92), the secondary block (91) is located between the primary block (92) and the baffle plate (5), and return springs (93) are connected between the secondary block (91) and the primary block (92) and the shell (4).
  3. 3. The automobile part injection mold with the rapid injection structure according to claim 2, wherein the limiting piece (8) comprises a connecting plate (81) which is in sliding connection with the guide rod (1), a limiting rod (82) which is fixedly connected with the connecting plate (81), the secondary block (91) and the primary block (92) are provided with through holes (901), and the diameter of the through holes (901) is equal to that of the limiting rod (82).
  4. 4. The injection mold for automobile parts with the rapid injection structure according to claim 2, wherein the secondary block (91) and the primary block (92) are arranged in a double-sided arc shape on one side close to the ejector pin device (6), and the thickness of the secondary block (91) is larger than that of the primary block (92).
  5. 5. The automobile part injection mold with the rapid injection structure according to claim 3, wherein the horizontal axes of the rotating needle part (7) and the movable mold (3) are coincident, the rotating needle part (7) comprises a needle tube (71) rotationally connected with the thimble device (6) and a torsion spring (72) connected between the needle tube (71) and the thimble device (6), the needle tube (71) is provided with a guide groove (711), and the interior of the needle tube (71) is hollow.
  6. 6. The automobile part injection mold with the rapid injection structure according to claim 5, wherein a linkage spring (101) is connected between the connecting frame (10) and the connecting plate (81), a pressing block (61) is fixedly connected to the thimble device (6), two ends of the pressing block (61) are arranged in a double-sided arc shape, and a through hole is formed in the connecting frame (10).
  7. 7. The automobile part injection mold with the rapid injection structure according to claim 6, wherein the baffle plate (5) is fixedly connected with two baffle sleeves (51) and an inner rod (52), the inner rod (52) is fixedly connected with a protruding shaft (521), and the diameter of the inner rod (52) is equal to the inner diameter of the needle tube (71).
  8. 8. The injection mold for automobile parts with rapid injection structure according to claim 7, wherein the diameter of the protruding shaft (521) is equal to the width of the guiding groove (711), the blocking sleeve (51) is concentric with the through hole, and the blocking plate (5) is provided with a round hole (501).
  9. 9. The automobile part injection mold with the rapid injection structure according to claim 2, wherein a return spring (62) is connected between the ejector pin device (6) and the movable mold (3), and the elastic coefficient of the return spring (62) is larger than that of the return spring (93).
  10. 10. The injection mold for automotive parts having a rapid injection molding structure according to claim 6, wherein when the link plate (81) is located at the initial position, a distance between a side of the limit lever (82) away from the link plate (81) and a side of the pressing block (61) is smaller than a thickness of the sub-block (91), and the side of the limit lever (82) is located between the pressing block (61) and the sub-block (91).

Description

Auto parts injection mold with structure of moulding plastics fast Technical Field The invention relates to the technical field of injection molds, in particular to an automobile part injection mold with a rapid injection structure. Background The injection molding process of automobile parts is a core process device for mass production of automobile injection molded parts, is widely applied to manufacturing of interior trim parts, exterior trim parts and functional part products, and is essentially characterized in that a cavity tool is designed according to the three-dimensional shape of the automobile parts, a mold is divided into a movable mold and a fixed mold, and equipment is respectively composed of core components such as a pouring system, a cooling system, a demolding system, a guiding positioning system and the like, and molten plastics are copied into solid parts consistent with the cavity. In the prior art, the demolding modes are three, firstly, the blowing demolding cost is lower, compressed air is introduced into a reserved air passage or an exhaust groove of a mold, an air cushion is formed on the surfaces of a part and the mold, the part is blown away from a cavity by virtue of air pressure, the structure only needs the air passage and an air compressor, but the automobile part is of a complex curved surface and a thin-wall structure, the high-pressure air flow is difficult to uniformly act, the local air pressure is too large, the part is easy to warp and deform at the edge, the subsequent assembly is influenced, the process cost is increased, the application range is extremely narrow, the mold stripping device can only be used for small parts with simple structure, high rigidity and small attaching area, secondly, the manipulator clamps the demolding, the mold stripping device is matched with a custom fixture by an industrial manipulator, the mold stripping action linkage is carried out with the injection molding machine, the precisely grabbed part is moved out, the mold is placed in a conveying belt or a material box, the defect is concentrated in the cost and maintenance aspect, and the automobile part is of a special-shaped structure, the fixture is designed in a customized way, the curved surface, the groove or the soft material part is easy to have the problem that the clamp is not firmly dropped or the surface is damaged, the operation space of a mechanical arm is reserved in the die, the size of the die is increased, the die opening stroke of the injection molding machine is prolonged, the production efficiency is reduced, the last one is the ejection and demolding of the ejector pins and the manual taking collocation, the most widely used general scheme is adopted at present, a plurality of steel ejector pins are arranged in the die, one end of the ejector pin is connected with an ejector pin plate, the other end of the ejector pin is aligned with a preset ejection point of a cavity, an ejector pin plate is pushed by an ejector mechanism of the injection molding machine after the die is opened, the ejector pin extends to jack the part, then the part is picked up by manpower, one is usually provided with the ejector pin plate by a baffle plate, the ejector pin plate is not moved, the movable die is continuously moved with the injection molding part, the ejector pin is pushed by the ejector pin, the injection molding part is directly pushed by an air cylinder, but both modes are pushed with a single distance, the injection molding part is not loosened in advance, and the ejector pins are in point contact with the part, so that the local pressure of the injection molding part is easily concentrated, and the part is enabled to be uneven in wall thickness, corner position or sticking position, and ejection crack occurs when the ejector pins are ejected. Disclosure of Invention The invention aims to provide an automobile part injection mold with a rapid injection structure, which solves the problem that an injection molding part cannot be rapidly and effectively demolded. The technical scheme includes that the automobile part injection mold with the rapid injection structure comprises a guide rod, a fixed mold clamped outside the guide rod, a movable mold connected with the outside of the guide rod in a sliding mode, a shell arranged outside the movable mold, a baffle plate fixedly connected with the guide rod, a thimble device connected with the movable mold in a sliding mode, two rotating needle parts rotatably connected with the thimble device, two baffle units connected with the guide rod in a sliding mode, two baffle units connected with the shell in a sliding mode, a connecting frame fixedly connected with the thimble device, the two rotating needle parts, the limiting parts and the baffle units are symmetrical relative to the central axis of the movable mold, the two limiting parts are connected with the connecting frame, the limiting parts comprise an initial position and a set