CN223790946U - A bushing injection mold - Google Patents

Abstract

The utility model relates to the technical field of injection molds, in particular to a bushing injection mold, which comprises a bottom plate, a top plate and four guide posts fixedly arranged between the bottom plate and the top plate, wherein a sliding seat capable of elastically resetting is arranged between left and right opposite guide posts in a sliding manner, a hydraulic cylinder is arranged on the top plate to drive the two sliding seats to synchronously move downwards, sliding grooves are formed in opposite sides of the two sliding seats, two movable molds capable of elastically separating are arranged between the sliding grooves in a sliding manner, the movable molds are connected with a rolling shaft in a rotating manner on the deviating side, a right-angle triangular block with an inclined surface facing the rolling shaft is arranged on the top surface of the bottom plate, and the rolling shaft is in rolling fit with the inclined surface of the triangular block. The utility model provides a mold assembly device, which comprises a base plate, a connecting plate, a sliding seat, a connecting plate, a movable mould, a semi-circular cavity, a core, a top ring, a connecting plate, a sliding seat and a lining, wherein the semi-circular cavity is arranged on the opposite side of the movable mould, the core matched with the cavity is arranged on the top surface of the base plate, the top ring is sleeved on the periphery of the core, and the connecting plate is symmetrically welded and fixedly connected with the bottom surface of the sliding seat.

Description

Bushing injection mold

Technical Field

The utility model relates to the technical field of injection molds, in particular to a bushing injection mold.

Background

In the field of injection molding, bushing molds are core tools for manufacturing annular or cylindrical plastic products, and are widely applied to the industries of automobiles, machinery and electronics for producing key components such as bearing bushings, sealing elements and the like.

The existing bushing injection mold has certain defects in practical application, after injection molding is finished, bushing products are easy to adhere to the cavity wall of a fixed mold or the core of a movable mold, so that demolding is difficult, manual taking out is needed, labor intensity is increased, surface damage or deformation of the bushing is caused by improper operation, the yield of products is reduced, meanwhile, the production rhythm is dragged slowly due to frequent manual intervention, efficiency bottlenecks are formed, and improvement of automatic production level is restricted.

Disclosure of utility model

The utility model aims to provide a bushing injection mold, which solves the problems in the background.

The bushing injection mold comprises a bottom plate, a top plate and four guide posts fixedly arranged between the bottom plate and the top plate and distributed in a rectangular shape, wherein a sliding seat capable of elastically resetting after moving downwards is slidably matched between each two opposite guide posts, a hydraulic cylinder for driving the two sliding seats to synchronously move downwards is fixedly arranged on the top surface of the top plate, sliding grooves are formed in one opposite side of the two sliding seats, two movable molds capable of being elastically separated after opposite mold clamping are slidably arranged between the two sliding grooves, one side, facing away from each other, of the two movable molds is respectively and rotatably connected with a roller which is longitudinally arranged, right-angle triangular blocks with two inclined faces facing the roller are fixedly arranged on the top surface of the bottom plate, the two rollers are respectively and rotatably matched with the inclined faces of the right-angle triangular blocks, semicircular cavities are formed in opposite sides of the two movable molds, a core which is positioned between the two semicircular cavities and is matched with the outline of the semicircular cavities is fixedly arranged on the top surface of the bottom plate, two movable molds are arranged on the periphery of the bottom plate, two movable molds are positioned below the top rings, and the two movable molds are correspondingly welded on the periphery of the bottom plates of the two movable molds, and the two movable molds are fixedly connected with the outer periphery plates.

Preferably, the top surface of bottom plate all opens along the periphery of every guide pillar has an annular groove, every all be provided with the first spring of movable sleeve locating the guide pillar periphery in the annular groove, the one end elasticity butt in the bottom surface of slide that keeps away from annular groove on the first spring.

Preferably, the piston shaft of the hydraulic cylinder movably penetrates through the top plate and is fixedly connected with a pressing plate positioned below the top plate, the pressing plate is slidably arranged on the four guide posts, the bottom surface of the pressing plate is fixedly connected with four connecting sleeves, each connecting sleeve is movably sleeved outside the corresponding guide post, and the bottom end of each connecting sleeve is fixedly connected with the top surface of the sliding seat.

Preferably, two sides that the slide deviates from are opened respectively and are linked together the movable groove of spout, every all the butt has an optical axis between the left and right sides in the movable groove, every the equal movable sleeve of periphery of optical axis is equipped with second spring and elasticity butt at the slider at second spring both ends, and the free end of two sliders on every optical axis is fixed respectively on corresponding movable mould.

Preferably, two bearing seats are respectively fixed on one sides of the two moving dies, which are away from each other, and each rolling shaft is rotationally connected between the two corresponding bearing seats.

Preferably, the top surface of the bottom plate is provided with a containing groove, and the top ring and the two connecting plates can be contained in the containing groove.

Preferably, an injection hole communicated with a semicircular cavity is formed in the top surface of one movable die.

Preferably, the bottom surfaces of the two movable molds are provided with cooling grooves which are arranged at positions close to the semicircular cavities, and one sides of the two movable molds, which are away from each other, are respectively provided with cooling holes communicated with the cooling grooves, wherein the cooling holes comprise water inlet holes and water outlet holes.

Compared with the prior art, the bushing injection mold has the beneficial effects that the two movable molds are arranged between the two sliding seats capable of elastically resetting after moving downwards in a sliding manner, the rolling shafts and the right-angle triangular blocks can be driven to push the movable molds to be matched with each other to mold the molds when the sliding seats move downwards, the movable molds are elastically separated along with the sliding seats when the sliding seats elastically reset, the connecting plates are driven to drive the ejector rings to eject the molding bushing, and finally, the mold closing molding and automatic demolding of the bushing are realized, so that the problems that the existing bushing production needs manual demolding, products are easy to damage, the mold is knocked down and the efficiency is low are solved.

Drawings

FIG. 1 is a schematic view of the overall structure of the present utility model;

FIG. 2 is a schematic partial cross-sectional view of the present utility model;

FIG. 3 is a schematic diagram of a movable mold according to the present utility model;

Fig. 4 is a schematic diagram of the movable mold in full section in the present utility model.

1, A bottom plate, 2, a top plate, 3, a guide post, 4, a sliding seat, 5, a hydraulic cylinder, 6, a sliding groove, 7, a movable die, 8, a roller, 9, a right-angle triangular block, 10, a semicircular cavity, 11, a core, 12, a top ring, 13, a connecting plate, 14, an annular groove, 15, a first spring, 16, a pressing plate, 17, a connecting sleeve, 18, a movable groove, 19, an optical axis, 20, a second spring, 21, a sliding block, 22, a bearing seat, 23, a containing groove, 24, an injection molding hole, 25, a cooling groove, 26 and a cooling hole.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples: referring to fig. 1 to 4, a bushing injection mold comprises a bottom plate 1, a top plate 2, and four rectangular guide posts 3 fixed between the bottom plate 1 and the top plate 2, sliding seats 4 capable of elastically resetting after moving downwards are slidably matched between the two guide posts 3 opposite to each other, hydraulic cylinders 5 for driving the two sliding seats 4 to synchronously move downwards are fixed on the top surface of the top plate 2, sliding grooves 6 are respectively arranged on opposite sides of the two sliding seats 4, two movable molds 7 capable of elastically separating after oppositely closing the mold are slidably arranged between the two sliding grooves 6, one longitudinally arranged roller 8 is respectively connected to opposite sides of the two movable molds 7 in a rotating manner, right triangular blocks 9 with two inclined surfaces facing the roller 8 are fixedly arranged on the top surface of the bottom plate 1, the inclined surfaces of the two right triangular blocks 9 are respectively matched with the two rollers 8 in a rolling manner, semicircular cavities 10 are respectively arranged on opposite sides of the two movable molds 7, the top surface of the bottom plate 1 is fixedly provided with a core 11 which is positioned between two semicircular cavities 10 and the outline of which is matched with the outline of the semicircular cavities 10, the periphery of the core 11 is movably sleeved with a top ring 12 positioned below the two movable molds 7, the periphery of the top ring 12 is symmetrically welded with a connecting plate 13, the outer ends of the two connecting plates 13 are respectively fixedly connected with the bottom surfaces of corresponding sliding seats 4, further, the sliding seats 4 are driven by a hydraulic cylinder 5 to move downwards along a guide post 3 to drive the movable molds 7 to move downwards synchronously, a roller 8 rolls along the top of an inclined plane of a right-angle triangular block 9 to the bottom of the inclined plane during the period of the synchronous downward movement of the movable molds 7, the two movable molds 7 are pushed to be clamped in opposite directions, the semicircular cavities 10 and the core 11 are enclosed to form a lining molding cavity, after the mold clamping is completed, the hydraulic cylinder 5 is decompressed, the sliding seats 4 are elastically reset and lifted, the roller 8 rolls along the bottom of the inclined plane of the right-angle triangular block 9 to the top of the inclined plane, and no more opposite thrust is generated to the movable molds 7, the movable mould 7 is separated elastically, and meanwhile, the sliding seat 4 drives the top ring 12 and the connecting plate 13 to ascend, so that the forming bushing is ejected out of the core 11, and the forming and demoulding of the bushing are realized.

The top surface of bottom plate 1 all opens along the periphery of every guide pillar 3 has an annular groove 14, all is provided with the first spring 15 of movable sleeve locating guide pillar 3 periphery in every annular groove 14, the one end elasticity butt in the bottom surface of slide 4 of keeping away from annular groove 14 on the first spring 15, further, through set up annular groove 14 and first spring 15 at guide pillar 3 periphery, when pneumatic cylinder 5 drive slide 4 moves down, slide 4 extrusion first spring 15 makes its shrink hold the power, after pneumatic cylinder 5 pressure release, first spring 15 releases holds the power, elasticity butt pushes away slide 4 and upwards moves along guide pillar 3, thereby realize the elasticity reset of slide 4.

The piston shaft of the hydraulic cylinder 5 movably penetrates through the top plate 2 and is fixedly connected with a pressing plate 16 positioned below the top plate 2, the pressing plate 16 is slidably arranged on the four guide posts 3, the bottom surface of the pressing plate 16 is fixedly connected with four connecting sleeves 17, each connecting sleeve 17 is movably sleeved outside the corresponding guide post 3, the bottom end of each connecting sleeve 17 is fixedly connected with the top surface of the corresponding sliding seat 4, further, when the hydraulic cylinder 5 drives the piston shaft to move downwards, the piston shaft drives the pressing plate 16 to move downwards synchronously along the guide posts 3, the pressing plate 16 transmits driving force to the two sliding seats 4 through the connecting sleeves 17, so that the two sliding seats 4 are ensured to be stressed uniformly and synchronously to move downwards along the guide posts 3, and the sliding seats 4 are prevented from moving downwards.

The movable grooves 18 communicated with the sliding grooves 6 are respectively formed in one side, away from each other, of each sliding seat 4, an optical axis 19 is respectively abutted between the left side and the right side in each movable groove 18, a second spring 20 and sliding blocks 21 elastically abutted to the two ends of the second spring 20 are respectively sleeved on the periphery of each optical axis 19, free ends of the two sliding blocks 21 on each optical axis 19 are respectively fixedly arranged on the corresponding movable die 7, further, by arranging the movable grooves 18, the optical axes 19 and the second springs 20, the rolling shafts 8 roll towards the inclined surface bottom along the inclined surface top of the right-angle triangular block 9 during die assembly, the movable die 7 is pushed to move oppositely, the movable die 7 drives the sliding blocks 21 to slide along the optical axes 19 and squeeze the second springs 20, after the sliding seats 4 ascend and the rolling shafts 8 roll towards the inclined surface top along the inclined surface bottom of the right-angle triangular block 9, the second springs 20 release the accumulated force to push the sliding blocks 21 to slide reversely along the optical axes 19, and the sliding blocks 21 drive the two movable dies 7 to separate reversely and remotely, so that the elastic separation of the movable die 7 is realized.

Two bearing seats 22 are respectively fixed on one side, away from each other, of the two movable dies 7, each roller 8 is rotationally connected between the corresponding two bearing seats 22, further, the bearing seats 22 are fixed on the side surfaces of the movable dies 7, the rollers 8 are rotationally connected between the two bearing seats 22, stable support is provided for the rollers 8, flexible rotation and no deviation are ensured when the rollers 8 roll along the inclined surfaces of the right-angle triangular blocks 9, and smooth die assembly and separation actions of the movable dies 7 are ensured.

The holding tank 23 has been seted up to the top surface of bottom plate 1, and top ring 12 and two connecting plates 13 all can hold in holding tank 23, and is further, through seting up holding tank 23, when slide 4 pushes down and drives movable mould 7 compound die, slide 4 synchronous drive top ring 12 and connecting plate 13 downwardly moving, and top ring 12 and connecting plate 13 can hold completely in holding tank 23 this moment, avoid both to produce the interference with bottom plate 1 top surface, ensure that slide 4 can move down to the compound die position smoothly, realize stable compound die.

The injection molding device comprises a movable mold 7, a cooling groove 25, a cooling hole 26, a water inlet and a water outlet, wherein the top surface of one movable mold 7 is provided with an injection molding hole 24 communicated with a semicircular cavity 10 arranged on the movable mold, the bottom surfaces of the two movable molds 7 are respectively provided with the cooling groove 25, the cooling grooves 25 are arranged at positions close to the semicircular cavities 10, one side of the two movable molds 7, which is away from each other, is respectively provided with the cooling hole 26 communicated with the cooling groove 25, the cooling hole 26 comprises the water inlet and the water outlet, and further, through arranging the cooling groove 25 and the water inlet and the water outlet, cooling water enters the cooling groove 25 from the water inlet during injection molding, flows along a groove body in a surrounding way and absorbs heat of the semicircular cavity 10, and is discharged from the water outlet, so that the movable mold 7 is rapidly cooled, the molding cooling time of a lining is shortened, the adhesion degree of the lining and the cavity is reduced, and the follow-up demolding is facilitated.

The working principle is that firstly, the die assembly action is started, the hydraulic cylinder 5 on the top surface of the top plate 2 provides driving force, the piston shaft of the hydraulic cylinder 5 extends downwards and drives the pressing plate 16 to synchronously move downwards along the four guide posts 3, as the bottom surface of the pressing plate 16 is fixedly connected with the two sliding seats 4 in a one-to-one correspondence manner through the four connecting sleeves 17, the driving force is uniformly transmitted to the two sliding seats 4 through the connecting sleeves 17, the sliding seats 4 stably slide downwards along the left and right opposite guide posts 3, in the process, the sliding seats 4 extrude the first springs 15 in the annular grooves 14 on the outer circumference of the guide posts 3, the first springs 15 shrink the force storage for preparation for the subsequent reset, meanwhile, the sliding seats 4 move downwards to drive the movable die 7 matched with the sliding seats 4 to synchronously move downwards, the movable die 7 rotates through the bearing seat 22 to synchronously move downwards, the roller 8 rolls along the inclined top of the right-angle triangular block 9 to the inclined surface bottom, lateral thrust in the horizontal direction is generated, the two movable die 7 is pushed to move along the sliding grooves 6 of the sliding seats 4 in the opposite directions, the sliding blocks 21 on the optical axes 19 are synchronously slid on the movable grooves 18, the second springs 20 between the sliding blocks 21 are extruded, potential energy is stored by the second springs 20, the second springs 20 shrink the movable die 7 completely to completely shrink the top surface of the semicircular die assembly cavity 11 until the die assembly cavity is completely matched with the semicircular die assembly cavity 11, and the die assembly cavity is completely formed. Simultaneously, the sliding seat 4 drives the top ring 12 to move downwards synchronously through the connecting plate 13 when the die is clamped, the top ring 12 and the connecting plate 13 are completely accommodated in the accommodating groove 23 of the bottom plate 1, interference with the bottom plate 1 is avoided, accurate and stable die clamping position is ensured, after the die is clamped in place, molten plastic is injected into the forming cavity through the injection molding hole 24 on the top surface of one movable die 7, a cooling system is started to cool, cooling water enters from the water inlet hole on the side surface of the movable die 7, flows through the cooling groove 25 arranged close to the semicircular cavity 10, fully absorbs heat of the movable die 7 and the forming cavity in the circulating flow process in the groove body, is discharged from the water outlet hole, the temperature of the molten plastic in the cavity is quickly reduced, the forming cooling time of the bushing is shortened, adhesion between the bushing and the cavity wall is reduced, convenience is provided for subsequent demoulding after the bushing forming cooling is finished, the hydraulic cylinder 5 releases pressure, the first spring 15 compressed before releases the accumulated force, the elastic pushing sliding seat 4 moves upwards along the guide post 3 to realize elastic reset of the sliding seat 4, the sliding seat 4 rises to drive the movable mould 7 to move upwards synchronously, the roller 8 rolls along the inclined surface bottom of the right-angle triangular block 9 to the inclined surface top along with the sliding seat, the lateral thrust of the movable mould 7 gradually disappears, at the moment, the second spring 20 compressed in the movable groove 18 releases elastic potential energy to push the sliding block 21 to slide reversely along the optical axis 19, the sliding block 21 drives the two movable moulds 7 to separate oppositely to finish the mould opening action, meanwhile, the sliding seat 4 rises to drive the top ring 12 to move upwards synchronously through the connecting plate 13, the top ring 12 pushes the formed lining upwards along the periphery of the core 11 to release the lining stably from the core 11, and finally complete forming and demoulding of the lining are realized.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (8)

1. The bushing injection mold comprises a bottom plate (1), a top plate (2) and four guide posts (3) which are fixedly arranged between the bottom plate (1) and the top plate (2) and are in rectangular distribution, and is characterized in that two right-angle triangular blocks (9) which are capable of elastically resetting after moving downwards are slidingly matched between each two guide posts (3) which are opposite to each other, the top surface of the top plate (2) is fixedly provided with a hydraulic cylinder (5) which drives the two sliding blocks (4) to synchronously move downwards, one opposite side of the two sliding blocks (4) is provided with a sliding groove (6), two movable molds (7) which are capable of elastically separating after being oppositely clamped are slidingly arranged between the two sliding grooves (6), one opposite side of each movable mold (7) is respectively and rotatably connected with a roller (8) which is longitudinally arranged, two right-angle triangular blocks (9) which are respectively and rotatably matched with two inclined surfaces of the roller (8) are fixedly arranged between the bottom plate (1), the two right-angle triangular blocks (9) are respectively and in rolling fit, one side of each movable mold (7) is provided with two semicircular molds (10) which are opposite to each other, one side of each semicircular mold is provided with a semicircular cavity (10) which is fixedly arranged between the two semicircular cavities (10), the core (11) is movably sleeved with a top ring (12) positioned below the two movable dies (7), connecting plates (13) are symmetrically welded on the periphery of the top ring (12), and the outer ends of the two connecting plates (13) are fixedly connected to the bottom surfaces of the corresponding sliding seats (4) respectively.

2. The bushing injection mold of claim 1, wherein the top surface of the bottom plate (1) is provided with an annular groove (14) along the periphery of each guide post (3), each annular groove (14) is internally provided with a first spring (15) movably sleeved on the periphery of the guide post (3), and one end, far away from the annular groove (14), of the first spring (15) is elastically abutted against the bottom surface of the sliding seat (4).

3. The bushing injection mold of claim 1, wherein a piston shaft of the hydraulic cylinder (5) movably penetrates through the top plate (2) and is fixedly connected with a pressing plate (16) positioned below the top plate (2), the pressing plate (16) is slidably arranged on the four guide posts (3), the bottom surface of the pressing plate (16) is fixedly connected with four connecting sleeves (17), the connecting sleeves (17) are respectively and movably sleeved outside the corresponding guide posts (3), and the bottom ends of the connecting sleeves (17) are fixedly connected with the top surface of the sliding seat (4).

4. The bushing injection mold according to claim 1, wherein one side, away from the sliding seat (4), of each sliding seat is provided with a movable groove (18) communicated with the sliding groove (6), an optical axis (19) is abutted between the left side and the right side in each movable groove (18), the periphery of each optical axis (19) is movably sleeved with a second spring (20) and sliding blocks (21) which are elastically abutted to two ends of the second spring (20), and free ends of the two sliding blocks (21) on each optical axis (19) are respectively fixedly arranged on the corresponding movable mold (7).

5. The bushing injection mold according to claim 1, wherein two bearing seats (22) are respectively fixed on one side, facing away from the movable mold (7), of each roller (8) and are rotatably connected between the corresponding two bearing seats (22).

6. The bushing injection mold according to claim 1, wherein the top surface of the bottom plate (1) is provided with a containing groove (23), and the top ring (12) and the two connecting plates (13) can be contained in the containing groove (23).

7. A bushing injection mold according to claim 1, wherein an injection hole (24) communicating with a semi-circular cavity (10) provided in the movable mold (7) is formed in the top surface of the movable mold.

8. The bushing injection mold according to claim 1 is characterized in that cooling grooves (25) are formed in the bottom surfaces of the two movable molds (7), the cooling grooves (25) are formed in positions close to the semicircular cavities (10), cooling holes (26) communicated with the cooling grooves (25) are formed in one sides, facing away from the movable molds (7), of the two movable molds, and the cooling holes (26) comprise water inlet holes and water outlet holes.