Forming injection mold with positioning function

Abstract

The invention belongs to the technical field of injection molds, and particularly relates to a forming injection mold with a positioning function. The injection mold comprises a machine base, a fixed mold body and a movable mold body, the fixed mold body is fixedly connected to the machine base, and an injection molding hole is formed in the fixed mold body; the movable mold is fixedly connected with the pushing mechanism; the two sides of the fixed mold are symmetrically connected with a pair of positioning assemblies, each positioning assembly comprises a pair of positioning seats, and the two sides of the movable mold are fixedly connected with a pair of limiting blocks; a guide cylinder is fixedly connected to the positioning seat, a lifting rod is slidably connected to the guide cylinder, a threaded rod is fixedly connected to the lifting rod, a lifting frame is fixedly connected to the threaded rod, and a positioning rod is fixedly connected to the lifting frame; the limiting block is fixedly connected with a positioning block, and the positioning block is provided with a positioning hole connected with the positioning rod in a matched mode. After the movable mold and the fixed mold are closed, the pushing mechanism continues to push forwards to insert the positioning rod into the positioning hole, so that the movable mold is automatically locked, and the stability of the mold after mold closing is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, and in particular to a molding injection mold with a positioning function. Background Art

[0002] At present, the traditional injection mold is a tool for producing plastic products. Specifically, the heated and melted plastic is injected into the mold cavity by the injection molding machine under high pressure, and the molded product is obtained after cooling and solidification. The injection mold consists of a movable mold and a fixed mold. The movable mold is installed on the movable mold plate of the injection molding machine, and the fixed mold is installed on the fixed mold plate of the injection molding machine.

[0003] When the injection mold is in use, the movable mold is pushed to the fixed mold position by the cylinder, the movable mold and the fixed mold are closed, and then the injection molding machine injects plastic liquid into the mold. After the plastic is solidified and formed, the mold can be opened to take out the plastic product; while waiting for the plastic to solidify, the existing mold needs to apply pressure to the movable mold through the cylinder for a long time to ensure the stability of the mold closing. The cylinder is in a high-pressure state for a long time, which will reduce the service life of the cylinder, and the fluctuation of the pressure in the cylinder also affects the mold closing stability and the quality of the workpiece. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a molding injection mold with a positioning function, which can automatically position and lock the movable mold by providing a positioning component on the fixed mold, thereby ensuring the stability of the mold, aiming to solve the problems in the background technology.

[0005] In order to achieve the above technical objectives, the specific technical scheme of the present invention is as follows: a molding injection mold with a positioning function proposed by the present invention comprises: a machine base, a fixed mold and a movable mold, the fixed mold is fixedly connected to the machine base, and an injection hole is provided on the fixed mold; a pushing mechanism is installed on the machine base, and the movable mold is fixedly connected to the pushing mechanism; a pair of positioning components are symmetrically connected on both sides of the fixed mold for positioning and locking the movable mold, the positioning component comprises a pair of positioning seats, and a pair of limit blocks are fixedly connected on both sides of the movable mold for connecting between the two positioning seats; a guide cylinder is fixedly connected to the positioning seat, a lifting rod is slidably connected to the guide cylinder, a threaded rod is fixedly connected to the lifting rod, a lifting frame is fixedly connected to the threaded rod, and a positioning rod is fixedly connected to the lifting frame; a positioning block is fixedly connected to the limit block, and a positioning hole that cooperates with the positioning rod is provided on the positioning block.

[0006] As a preferred technical solution of the present invention, the positioning seat is rotatably connected to a rotating shaft, a torsion spring is installed on the rotating shaft, a first gear is fixedly connected to the rotating shaft, the positioning seat is fixedly connected to a fixed seat, a second gear meshing with the first gear is rotatably connected to the fixed seat, and a threaded sleeve threadedly connected to the threaded rod is fixedly connected to the second gear, and the second gear drives the threaded rod to rise and fall when the second gear rotates.

[0007] As a preferred technical solution of the present invention, the rotating shaft is connected to a rotating frame, and the rotating shaft is driven to rotate when the rotating frame rotates, and a connecting sleeve slidably connected to the rotating shaft is fixedly connected to the rotating frame.

[0008] As a preferred technical solution of the present invention, a connecting frame is connected to the movable mold, the connecting frame is fixedly connected to the pushing mechanism, an elastic component is connected between the connecting frame and the limit block, and pushing frames are fixedly connected to both ends of the connecting frame for pushing the rotating frame to rotate.

[0009] As a preferred technical solution of the present invention, a ratchet is fixedly connected to the rotating shaft, a connecting block is fixedly connected to the positioning seat, a pawl cooperating with the ratchet is rotatably connected to the connecting block, and a tension spring is fixedly connected between the pawl and the connecting block.

[0010] As a preferred technical solution of the present invention, a bracket is fixedly connected to the pawl, and the two brackets are fixedly connected via a telescopic frame.

[0011] As a preferred technical solution of the present invention, a sliding groove slidably connected to the positioning seat is provided on the side of the fixed mold, and the positioning seat is fixedly connected to the fixed mold through a screw rod, and one end of the screw rod is fixedly connected to the fixed mold through a nut.

[0012] As a preferred technical solution of the present invention, a pair of guide frames are fixedly connected to the surface of the movable mold, and a mold ejection rod is movably connected to the guide frame for demolding the molded workpiece in the movable mold; one end of the mold ejection rod extends into the interior of the movable mold.

[0013] As a preferred technical solution of the present invention, a pair of sliders are slidably connected to the surface of the movable mold, a stopper is fixedly connected to the push mold rod, a groove is provided on the slider, a moving block is slidably connected in the groove, a first connecting rod is rotatably connected between the moving block and the stopper, and a second connecting rod is rotatably connected between the connecting frame and the slider.

[0014] As a preferred technical solution of the present invention, a cylindrical spring is connected between the stopper and the guide frame, and the cylindrical spring is sleeved on the surface of the ejector rod.

[0015] The beneficial effects of the present invention are:

[0016] 1. The present invention provides positioning components on both sides of the fixed mold. After the movable mold and the fixed mold are closed, when the pushing mechanism continues to push forward, the pushing frame drives the rotating frame to rotate, and then drives the lifting frame to move, and the positioning rod is inserted into the positioning hole, thereby realizing automatic locking of the movable mold and ensuring the stability of the mold after closing.

[0017] 2. The present invention connects a push rod to the movable mold. When the movable mold approaches the fixed mold, one end of the push rod is automatically drawn out of the movable mold. When the movable mold moves away from the fixed mold, the push rod can automatically eject the workpiece from the movable mold by the elastic force of the cylindrical spring, thereby achieving the function of automatic demoulding. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The present invention is a schematic structural diagram of a molding injection mold with a positioning function.

[0019] Figure 2 It is a structural schematic diagram of the movable mold proposed by the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of the positioning component proposed by the present invention.

[0021] Figure 4 The structural schematic diagram of the fixed mold proposed by the present invention

[0022] Figure 5 This is a schematic diagram from another angle of the fixed mold proposed by the present invention.

[0023] Figure 6 for Figure 5 A partial enlarged view of point A in the middle.

[0024] In the figure: 1, machine base; 2, fixed mold; 21, injection hole; 22, screw; 23, slide; 3, positioning assembly; 31, positioning seat; 32, rotating shaft; 33, ratchet; 34, first gear; 35, fixed seat; 36, second gear; 37, threaded sleeve; 38, threaded rod; 39, lifting frame; 310, positioning rod; 311, lifting rod; 312, guide cylinder; 313, rotating frame; 314, connecting sleeve; 315, ratchet; 3 16. Tension spring; 317. Bracket; 318. Telescopic frame; 319. Connecting block; 320. Torsion spring; 4. Moving mold; 41. Limiting block; 42. Connecting frame; 43. Positioning hole; 44. Pushing frame; 45. Elastic component; 46. Positioning block; 5. Pushing mold rod; 51. Stop block; 52. Guide frame; 53. Sliding block; 54. First connecting rod; 55. Second connecting rod; 56. Cylindrical spring; 57. Moving block; 58. Groove; 6. Pushing mechanism. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] Embodiment 1: This embodiment discloses a molding injection mold with a positioning function, such as Figure 1-Figure 6As shown, it includes: a machine base 1, a fixed mold 2 and a movable mold 4, the fixed mold 2 is fixedly connected to the machine base 1, and an injection hole 21 is provided on the fixed mold 2, and the injection molding machine injects molten plastic into the mold through the injection hole 21; a pushing mechanism 6 is installed on the machine base 1, the pushing mechanism 6 adopts a cylinder, the movable mold 4 is fixedly connected to the pushing mechanism 6, and the movable mold 4 is driven to move by the pushing mechanism 6, so that the movable mold 4 can be molded with the fixed mold 2; a pair of positioning components 3 are symmetrically connected on both sides of the fixed mold 2, which are used to position and lock the movable mold 4 to ensure that the movable mold 4 is accurately positioned and the mold is stable.

[0027] like Figure 3-Figure 4 As shown, the positioning assembly 3 includes a pair of positioning seats 31, the two positioning seats 31 are distributed up and down, and a pair of limit blocks 41 are fixedly connected on both sides of the movable mold 4, which are used to connect between the two positioning seats 31, so that the position of the movable mold 4 is accurate; a sliding groove 23 is provided on the side of the fixed mold 2 with a sliding connection to the positioning seat 31, and the positioning seat 31 is fixedly connected to the fixed mold 2 through a screw rod 22, one end of the screw 22 is fixedly connected to the positioning seat 31, and one end of the screw 22 is fixedly connected to the fixed mold 2 through a nut, so as to facilitate fine adjustment of the position of the positioning seat 31; a guide cylinder 312 is fixedly connected to the positioning seat 31, and a lifting rod 311 is slidably connected to the guide cylinder 312, and the lifting rod 311 is limited to It moves up and down in the guide cylinder 312, and the lifting rod 311 is fixedly connected with a threaded rod 38, and the threaded rod 38 is fixedly connected with a lifting frame 39, and the lifting frame 39 is fixedly connected with a positioning rod 310; the limiting block 41 is fixedly connected with a positioning block 46, and the positioning block 46 is provided with a positioning hole 43 which is connected with the positioning rod 310, and the shape of the positioning hole 43 is the same as that of the positioning rod 310, and the positioning rod 310 can be set to a cylindrical or rectangular structure; after the movable mold 4 and the fixed mold 2 are molded together, the limiting block 41 is connected between the two positioning seats 31, and the positioning rod 310 is driven to be inserted into the positioning hole 43 by moving the lifting frame 39, so as to achieve the purpose of locking the movable mold.

[0028] The locating seat 31 is rotatably connected to a rotating shaft 32, a torsion spring 320 is installed on the rotating shaft 32, and a retaining frame matched with the torsion spring 320 is provided on both the locating seat 31 and the rotating shaft 32. When the rotating shaft 32 rotates, the torsion spring 320 is deformed, and the torsion spring 320 plays a role in resetting the rotating shaft 32. A first gear 34 is fixedly connected to the rotating shaft 32, and a fixing seat 35 is fixedly connected to the locating seat 31. A second gear 36 meshing with the first gear 34 is rotatably connected to the fixing seat 35, and a threaded sleeve 37 threadedly connected to the threaded rod 38 is fixedly connected to the second gear 36. When the rotating shaft 32 rotates, The first gear 34 is driven to rotate, and when the first gear 34 rotates, the second gear 36 is driven to rotate, and when the second gear 36 rotates, the threaded sleeve 37 is driven to rotate, which can drive the threaded rod 38 to rise and fall, thereby driving the lifting frame 39 to move, and controlling the positioning rod 310 to be inserted into the positioning hole 43; wherein, a rotating frame 313 is connected to the rotating shaft 32, and a connecting sleeve 314 slidably connected to the rotating shaft 32 is fixedly connected to the rotating frame 313, and the connecting sleeve 314 is provided with a pair of connections respectively connected to the two rotating shafts 32, and the connecting sleeve 314 only slides on the rotating shaft 32, and when the rotating frame 313 rotates, it drives the rotating shaft 32 to rotate.

[0029] Among them, a ratchet 33 is fixedly connected to the rotating shaft 32, a connecting block 319 is fixedly connected to the positioning seat 31, a pawl 315 cooperating with the ratchet 33 is rotatably connected to the connecting block 319, and a tension spring 316 is fixedly connected between the pawl 315 and the connecting block 319. The pawl 315 maintains contact with the ratchet 33 under the tension of the tension spring 316, and a bracket 317 is fixedly connected to the pawl 315. The two brackets 317 are fixedly connected by a telescopic frame 318. The pawl 315 can be driven to rotate by rotating the telescopic frame 318 to control the contact between the pawl 315 and the ratchet 33.

[0030] Among them, a connecting frame 42 is connected to the movable mold 4, the connecting frame 42 is fixedly connected to the pushing mechanism 6, and an elastic component 45 is connected between the connecting frame 42 and the limit block 41. The elastic component 45 adopts a matching structure of a slide rod and a spring, and pushing frames 44 are fixedly connected to both ends of the connecting frame 42 for pushing the rotating frame 313 to rotate.

[0031] During the specific implementation, the push mechanism 6 drives the movable mold 4 to move, the movable mold 4 first contacts the fixed mold 2, and the limit block 41 is inserted between the two positioning seats 31. When the push mechanism 6 pushes, the movable mold 4 remains stationary, and the connecting frame 42 moves toward the movable mold 4. During the movement, the push frame 44 drives the rotating frame 313 to rotate, and the rotating frame 313 drives the rotating shaft 32 to rotate when the rotating frame 313 rotates. The rotating shaft 32 drives the first gear 34, the second gear 36 and the threaded sleeve 37 to rotate, and then drives the threaded rod 38 and the lifting frame 39 to move toward the limit block 41, so that the positioning rod 310 is inserted into the positioning hole 43. The ratchet 33 is limited by the pawl 315, thereby avoiding the reverse rotation of the rotating shaft 32, positioning and locking the position of the movable mold 4, reducing the pressure of the pushing mechanism 6, and ensuring the stability of the movable mold 4 when the mold is closed; when the mold needs to be opened, the pawl 315 can be driven to separate from the ratchet 33 by manually rotating the telescopic frame 318. At this time, the pushing mechanism 6 contracts, first driving the connecting frame 42 to move in the reverse direction, and the rotating shaft 32 rotates in the reverse direction under the torsion of the torsion spring 320, driving the lifting frame 39 to rise. After the positioning rod 310 is pulled out of the positioning hole 43, the movable mold 4 moves in the reverse direction and separates from the fixed mold 2.

[0032] Embodiment 2: Based on the structure of the above embodiment 1, the difference is that Figure 5-Figure 6 As shown, in order to facilitate demoulding of the workpiece, a pair of guide frames 52 are fixedly connected to the surface of the movable mold 4, and a push rod 5 is movably connected to the guide frame 52 for demoulding the molded workpiece in the movable mold 4; one end of the push rod 5 extends to the inside of the movable mold 4; a pair of sliders 53 are slidably connected to the surface of the movable mold 4, and the two sliders 53 correspond to the two push rods 5 respectively, and a stopper 51 is fixedly connected to the push rod 5, and a groove 58 is provided on the slider 53, and a moving block 57 is slidably connected in the groove 58, and a first connecting rod 54 is rotatably connected between the moving block 57 and the stopper 51, and a second connecting rod 55 is rotatably connected between the connecting frame 42 and the slider 53; a cylindrical spring 56 is connected between the stopper 51 and the guide frame 52, and the cylindrical spring 56 is sleeved on the surface of the push rod 5, and the cylindrical spring 56 applies elastic force to the stopper 51.

[0033] During specific implementation: after the movable mold 4 and the fixed mold 2 are closed, when the connecting frame 42 continues to approach the movable mold 4, the connecting frame 42 drives the slider 53 to slide, and the slider 53 drives the ejection rod 5 to move away from the movable mold 4 until one end of the ejection rod 5 is just flush with the inside of the movable mold 4, and the cylindrical spring 56 is compressed by force; when the injection molding mold is opened, the connecting frame 42 first moves away from the movable mold 4, and the connecting frame 42 drives the slider 53 to move in the opposite direction, and the moving block 57 moves from one end of the groove 58 to the other end away from the second connecting rod 55, and the position of the ejection rod 5 remains unchanged. When the movable mold 4 is separated from the fixed mold 2, the workpiece will be separated from the fixed mold 2 together with the movable mold 4. During the separation process, the ejection rod 5 applies a thrust to the workpiece under the elastic force of the cylindrical spring 56, and automatically pushes the workpiece out of the movable mold 4, thereby achieving the purpose of automatic demolding of the workpiece.

[0034] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A molding injection mold with positioning function, characterized in that: include: A machine base (1), a fixed mold (2) and a movable mold (4), wherein the fixed mold (2) is fixedly connected to the machine base (1), and an injection hole (21) is provided on the fixed mold (2); A pushing mechanism (6) is mounted on the machine base (1), and the movable mold (4) is fixedly connected to the pushing mechanism (6); A pair of positioning components (3) are symmetrically connected to both sides of the fixed mold (2) for positioning and locking the movable mold (4), the positioning component (3) comprising a pair of positioning seats (31), and a pair of limit blocks (41) are fixedly connected to both sides of the movable mold (4) for connecting between the two positioning seats (31); The positioning seat (31) is fixedly connected with a guide cylinder (312), the guide cylinder (312) is slidably connected with a lifting rod (311), the lifting rod (311) is fixedly connected with a threaded rod (38), the threaded rod (38) is fixedly connected with a lifting frame (39), and the lifting frame (39) is fixedly connected with a positioning rod (310); A positioning block (46) is fixedly connected to the limit block (41), and the positioning block (46) is provided with a positioning hole (43) that cooperates with the positioning rod (310).

2. The molding injection mold with positioning function according to claim 1, characterized in that: The positioning seat (31) is rotatably connected to a rotating shaft (32), a torsion spring (320) is installed on the rotating shaft (32), a first gear (34) is fixedly connected to the rotating shaft (32), a fixing seat (35) is fixedly connected to the positioning seat (31), a second gear (36) meshing with the first gear (34) is rotatably connected to the fixing seat (35), and a threaded sleeve (37) threadedly connected to the threaded rod (38) is fixedly connected to the second gear (36), and the threaded rod (38) is driven to rise and fall when the second gear (36) rotates.

3. The molding injection mold with positioning function according to claim 2, characterized in that: The rotating shaft (32) is connected to a rotating frame (313), and when the rotating frame (313) rotates, the rotating shaft (32) is driven to rotate, and a connecting sleeve (314) is fixedly connected to the rotating frame (313) and is slidably connected to the rotating shaft (32).

4. The molding injection mold with positioning function according to claim 3, characterized in that: The movable mold (4) is connected to a connecting frame (42), the connecting frame (42) is fixedly connected to the pushing mechanism (6), an elastic component (45) is connected between the connecting frame (42) and the limit block (41), and pushing frames (44) are fixedly connected to both ends of the connecting frame (42) for pushing the rotating frame (313) to rotate.

5. The molding injection mold with positioning function according to claim 4, characterized in that: The rotating shaft (32) is fixedly connected with a ratchet (33), the positioning seat (31) is fixedly connected with a connecting block (319), the connecting block (319) is rotatably connected with a ratchet pawl (315) matched with the ratchet (33), and a tension spring (316) is fixedly connected between the ratchet pawl (315) and the connecting block (319).

6. The molding injection mold with positioning function according to claim 5, characterized in that: The ratchet (315) is fixedly connected to a bracket (317), and the two brackets (317) are fixedly connected via a telescopic bracket (318).

7. The molding injection mold with positioning function according to claim 6, characterized in that: The side of the fixed mold (2) is provided with a sliding groove (23) slidably connected to the positioning seat (31), and the positioning seat (31) is fixedly connected to the fixed mold (2) through a screw rod (22), and one end of the screw rod (22) is fixedly connected to the fixed mold (2) through a nut.

8. The molding injection mold with positioning function according to claim 7, characterized in that: A pair of guide frames (52) are fixedly connected to the surface of the movable mold (4), and a mold ejection rod (5) is movably connected to the guide frame (52) for demoulding the molded workpiece in the movable mold (4); one end of the mold ejection rod (5) extends into the interior of the movable mold (4).

9. The molding injection mold with positioning function according to claim 8, characterized in that: A pair of sliders (53) are slidably connected to the surface of the movable mold (4), a stopper (51) is fixedly connected to the ejector rod (5), a groove (58) is provided on the slider (53), a moving block (57) is slidably connected in the groove (58), a first connecting rod (54) is rotatably connected between the moving block (57) and the stopper (51), and a second connecting rod (55) is rotatably connected between the connecting frame (42) and the slider (53).

10. The molding injection mold with positioning function according to claim 9, characterized in that: A cylindrical spring (56) is connected between the stopper (51) and the guide frame (52), and the cylindrical spring (56) is sleeved on the surface of the ejector rod (5).

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