CN213972383U - Injection mold for low-pressure molding of high-gloss transparent part - Google Patents

Abstract

The application relates to the technical field of injection molds, in particular to an injection mold for low-pressure molding of a high-gloss transparent part, which comprises a support, an upper mold and a lower mold which are arranged at intervals, wherein a lifting part for driving the upper mold to lift is arranged on the support, a mold groove is formed in the lower surface of the upper mold, a fixing plate is arranged on the upper surface of the lower mold, the injection mold also comprises a jacking component, the jacking component comprises an inserting hole formed in the wall of the top groove of the mold groove, a jacking column is inserted in the inserting hole, the upper end surface of the jacking column is abutted against the wall of the top hole of the inserting hole, and the lower end surface of the jacking column is flush with the wall of the top groove of the mold groove; the upper surface of the upper die is provided with a connecting hole communicated with the inserting hole, the aperture of the connecting hole is smaller than that of the inserting hole, and the support is provided with a fixing rod penetrating through the connecting hole. This application has improved the unloading efficiency of transparency.

Description

Injection mold for low-pressure molding of high-gloss transparent part

Technical Field

The application relates to the technical field of injection molds, in particular to an injection mold for low-pressure molding of a high-gloss transparent part.

Background

The high-gloss transparent piece has high requirements on appearance, and the front surface and the back surface of the product are both appearance. Generally, the high-gloss transparent member is formed by low-pressure injection molding. Low pressure molding is a process of injecting a packaging material into a mold at a very low injection pressure and rapidly curing the molding.

As shown in fig. 1, the current injection mold comprises a support 1, an upper mold 2 and a lower mold 3 which are arranged at an upper-lower interval, a lifting piece for driving the upper mold 2 to lift is arranged on the support 1, a mold cavity 21 is arranged on the lower surface of the upper mold 2, and a fixing plate 31 is arranged on the upper surface of the lower mold 3. In the injection molding process, the lifting piece drives the upper die 2 to descend, so that the upper die 2 and the lower die 3 are matched, the fixing plate 31 is embedded in the die cavity 21, and at the moment, a worker injects the plastic in a molten state into the die cavity 21 and makes the plastic solution fill the die cavity 21. Subsequently, the driver will drive the upper mold 2 to further descend, so that the fixing plate 31 is further inserted into the mold cavity 21, and at this time, the distance between the upper surface of the fixing plate 31 and the top groove wall of the mold cavity 21 is reduced, thereby realizing the compression of the molten plastic in the mold cavity 21. Finally, the molten plastic in the cavity 21 is cooled and formed, and the high-gloss transparent part is manufactured.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: after the transparent piece injection moulding, the piece that goes up will be driven to go up the mould and rise and keep away from in the lower mould, and the transparent piece probably blocks in the die cavity, needs the workman to take out the transparent piece from the die cavity manually this moment, has influenced the unloading efficiency of transparent piece, consequently needs to improve.

SUMMERY OF THE UTILITY MODEL

In order to improve the unloading efficiency of transparency, the application provides an injection mold of low pressure shaping highlight transparency.

The application provides a pair of injection mold of low pressure shaping highlight transparency adopts following technical scheme: an injection mold for low-pressure molding of a highlight transparent part comprises a support, an upper mold and a lower mold which are arranged at an interval from top to bottom, wherein a lifting part for driving the upper mold to lift is arranged on the support, a mold groove is formed in the lower surface of the upper mold, a fixing plate is arranged on the upper surface of the lower mold, the injection mold further comprises a jacking assembly, the jacking assembly comprises an insertion hole formed in the top groove wall of the mold groove, a jacking column is inserted in the insertion hole, the upper end surface of the jacking column is abutted against the top hole wall of the insertion hole, and the lower end surface of the jacking column is flush with the top groove wall of the mold groove; the upper surface of the upper die is provided with a connecting hole communicated with the inserting hole, the aperture of the connecting hole is smaller than that of the inserting hole, and the support is provided with a fixing rod penetrating through the connecting hole.

Through adopting above-mentioned technical scheme, drive when the piece that goes up and down and go up the mould decline for when going up mould and lower mould compound die, the up end of fore-set will be contradicted in the top pore wall of spliced eye, and the lower terminal surface of fore-set will flush with the top cell wall of die cavity, makes the difficult injection moulding who influences transparent in the die cavity of fore-set. Then, the lifting piece drives the upper die to rise, and the fixing rod is gradually embedded into the connecting hole; when the fixed rod is abutted to the upper end surface of the ejection column, the ejection column cannot continue to ascend, and the ejection column ejects the transparent piece clamped in the die cavity onto the fixed plate. Therefore, the upper die is driven to ascend through the lifting piece, the transparent piece can fall onto the fixing plate from the die cavity, operation is convenient, and discharging efficiency of the transparent piece is improved.

Optionally, the side wall of the fixing rod and the hole wall of the connecting hole are arranged at an interval, a spring for urging the upper end face of the top post to abut against the hole wall of the top of the inserting hole is wound outside the fixing rod, one end of the spring is fixedly connected to the hole wall of the connecting hole, and the other end of the spring is fixedly connected to the top post.

Through adopting above-mentioned technical scheme, when the workman was not to the spring application of force, the spring will be in deformation state and make the up end of fore-set support tightly in the top pore wall of spliced eye for the lower terminal surface of fore-set flushes with the top cell wall of die cavity, thereby further makes the fore-set difficult influence transparent's injection moulding. When the driving piece drives the upper die to rise, the fixed rod pushes the top column out of the plug hole, and the spring further deforms; when the driving piece drives the upper die to descend, the spring drives the ejection column to move and reset.

Optionally, still include the unloading subassembly, the unloading subassembly includes rotates the push pedal of connecting in the support through the montant, and the push pedal rotates and contradicts in the transparent on the fixed plate.

Through adopting above-mentioned technical scheme, when rotatory montant, the montant will drive the push pedal rotation, and the transparent on the push pedal will be fixed plate promotes and breaks away from in the fixed plate, need not the workman and extends the palm earlier and take the transparent again between mould and the lower mould, the unloading of the transparent of being convenient for.

Optionally, the blanking assembly further comprises a rack, a driving piece and a horizontal shaft, the driving piece drives the rack to move along the length direction of the rack, the horizontal shaft is rotatably connected to the support, a matching gear and a first bevel gear are sleeved on the horizontal shaft, the matching gear is meshed with the rack, a second bevel gear is meshed with the first bevel gear, and the second bevel gear is fixedly sleeved on the vertical rod.

By adopting the technical scheme, when the driving piece drives the rack to move along the length direction of the rack, the rack drives the matching gear, the horizontal shaft and the first bevel gear to rotate, and the first bevel gear drives the second bevel gear, the vertical rod and the push plate to rotate. Therefore, the driving piece drives the rack to move, so that the push plate can be promoted to push the transparent piece to be separated from the fixed plate, and the operation is convenient.

Optionally, the rack extends in a vertical direction, and the driving member is a connecting plate connected to the rack and the upper die.

By adopting the technical scheme, when the driving piece drives the upper die to lift, the upper die drives the rack to move through the connecting plate, and the rack drives the push plate to rotate through the matching gear, the horizontal shaft, the first bevel gear, the second bevel gear and the vertical rod. When the lifting piece drives the upper die to ascend, the transparent piece is pushed to be separated from the fixed plate by the push plate, so that automatic blanking of the transparent piece is realized; when the lifting piece drives the upper die to descend, the push plate rotates to reset.

Optionally, a plurality of rolling grooves are formed in the push plate, a ball is embedded in each rolling groove in a rolling manner, and the surface part of each ball protrudes out of each rolling groove and is used for pushing the transparent part to move.

By adopting the technical scheme, when the push plate rotates towards the transparent part, the part of the ball protruding out of the rolling groove is abutted against the transparent part; in the process that the transparent part is pushed to move by the balls, the transparent part is possible to slide relative to the balls, and the transparent part drives the balls to roll in the rolling groove, so that the sliding friction between the push plate and the transparent part is changed into the rolling friction between the balls and the transparent part, and the abrasion of the transparent part is reduced.

Optionally, still including receiving the material subassembly, receive the material subassembly including locating on the support and being used for receiving the receipts flitch of the transparent member that is promoted by the push pedal, receive the flitch and be the slope setting, and receive the high-end connection in the lower mould of material platform.

Through adopting above-mentioned technical scheme, promote the transparency when breaking away from in the fixed plate when the push pedal, the transparency will drop to receive on the flitch and along receiving the incline direction gliding of flitch to the support for on the transparency is difficult for directly dropping the support, reduced colliding with of transparency.

Optionally, a plurality of positioning grooves extending in the vertical direction are formed in the lower die, and a plurality of positioning rods embedded in the corresponding positioning grooves in a sliding manner are arranged on the upper die.

Through adopting above-mentioned technical scheme, when the piece that goes up and down drove and go up the mould decline, the locating lever will insert in the constant head tank for go up the difficult relative lower mould of mould and take place to rock, thereby improved the injection moulding quality of transparent.

To sum up, the application comprises the following beneficial technical effects:

1. the material ejecting assembly is arranged, the upper die is driven to ascend through the lifting piece, so that the transparent piece can fall onto the fixed plate from the die cavity, the operation is convenient, and the blanking efficiency of the transparent piece is improved;

2. the blanking assembly is arranged, and the upper die is driven to lift by the lifting piece, so that the injection molding of the transparent piece and the automatic blanking of the transparent piece can be realized;

3. receive the setting of material subassembly for on being promoted to break away from the transparency landing of fixed plate to receive the flitch, reduced colliding with of transparency.

Drawings

FIG. 1 is a schematic sectional view of an injection mold in the background art;

FIG. 2 is a schematic structural diagram of the whole in the embodiment of the present application;

FIG. 3 is a schematic cross-sectional view showing an upper die in the embodiment of the present application;

fig. 4 is a schematic configuration diagram showing the closing of the upper mold and the lower mold in the embodiment of the present application.

Reference numerals: 1. a support; 2. an upper die; 21. a die cavity; 22. an injection molding port; 23. positioning a rod; 3. a lower die; 31. a fixing plate; 32. positioning a groove; 4. a hydraulic cylinder; 5. a material ejecting component; 51. inserting holes; 52. a top pillar; 53. connecting holes; 54. fixing the rod; 55. a spring; 6. a blanking assembly; 61. pushing the plate; 611. a vertical rod; 62. a rolling groove; 63. a ball bearing; 64. a connecting plate; 65. a second bevel gear; 66. a first bevel gear; 67. a horizontal axis; 68. a mating gear; 69. a rack; 7. a material receiving assembly; 71. a material collecting plate; 72. a baffle plate; 73. and a limiting plate.

Detailed Description

The present application is described in further detail below with reference to figures 2-4.

The embodiment of the application discloses injection mold of low pressure shaping highlight transparency. As shown in fig. 2 and fig. 3, an injection mold for molding a high-gloss transparent part at low pressure comprises a bracket 1, and an upper mold 2 and a lower mold 3 which are arranged at an interval from top to bottom. Two lifting pieces are fixed on the support 1, the two lifting pieces are hydraulic cylinders 4, and piston rods of the two hydraulic cylinders 4 extend along the vertical direction and are fixedly connected to the upper surface of the upper die 2. The lower surface of the upper die 2 is provided with a die cavity 21, and the side wall of the upper die 2 is provided with an injection molding port 22 communicated with the die cavity 21; a fixing plate 31 is fixed to the upper surface of the lower mold 3.

In the injection molding process, the hydraulic cylinder 4 drives the upper mold 2 to descend, so that the upper mold 2 and the lower mold 3 are assembled, the fixing plate 31 is embedded in the mold cavity 21, and at the moment, a worker injects the plastic in a molten state into the mold cavity 21 through the injection port 22, and the mold cavity 21 is filled with the plastic solution. Subsequently, the hydraulic cylinder 4 will drive the upper mold 2 to further descend, so that the fixing plate 31 is further embedded into the mold cavity 21, and at this time, the distance between the upper surface of the fixing plate 31 and the top groove wall of the mold cavity 21 will be reduced, thereby realizing the compression of the molten plastic in the mold cavity 21. Finally, the molten plastic in the cavity 21 is cooled and formed, and the high-gloss transparent part is manufactured.

As shown in fig. 2, the upper surface of the lower mold 3 is provided with a plurality of positioning grooves 32 extending in the vertical direction, the upper surface of the upper mold 2 is fixed with a plurality of positioning rods 23 extending in the vertical direction, and the positioning rods 23 correspond to the positioning grooves 32 one to one. When pneumatic cylinder 4 drove and goes up mould 2 and descend, locating lever 23 will insert in the constant head tank 32 for go up mould 2 and be difficult for 3 lower moulds relatively and take place to rock.

As shown in fig. 2, the upper mold 2 is provided with an ejector assembly 5, and the ejector assembly 5 is used for ejecting the transparent member clamped in the mold cavity 21 onto the fixing plate 31. Be equipped with unloading subassembly 6 and receipts material subassembly 7 on the support 1, unloading subassembly 6 is used for promoting the transparency on the fixed plate 31 to receive the material subassembly 7 on, receives the material subassembly 7 and is used for the transparency to collect.

As shown in fig. 2 and 3, the ejection assembly 5 includes an insertion hole 51 formed in a wall of the top groove of the mold chase 21, an ejection column 52 is inserted into the insertion hole 51, and a height of the ejection column 52 is the same as a depth of the insertion hole 51. When pneumatic cylinder 4 drove last mould 2 and descends for go up mould 2 and 3 compound dies of lower mould, the up end of fore-set 52 will contradict in the top pore wall of spliced eye 51, and the lower terminal surface of fore-set 52 will flush with the top cell wall of chase 21, makes fore-set 52 be difficult for influencing the injection moulding of transparency in the chase 21.

As shown in fig. 3, the upper surface of the upper die 2 is provided with a connection hole 53 communicated with the insertion hole 51, the insertion hole 51 and the connection hole 53 are both circular holes, and the aperture of the connection hole 53 is smaller than that of the insertion hole 51, so that the top pillar 52 cannot rise and slide into the connection hole 53. A fixing rod 54 penetrating through the connecting hole 53 is fixed on the bracket 1, and when the hydraulic cylinder 4 drives the upper die 2 to ascend, the fixing rod 54 is gradually embedded into the connecting hole 53; when the fixing rod 54 abuts against the upper end surface of the top pillar 52, the top pillar 52 cannot rise further, and at this time, the top pillar 52 ejects the transparent member clamped in the mold cavity 21 onto the fixing plate 31.

As shown in fig. 3, when the fixing lever 54 is inserted into the connection hole 53, the side wall of the fixing lever 54 is spaced apart from the hole wall of the connection hole 53. A spring 55 is wound outside the fixing rod 54, one end of the spring 55 is fixedly connected to the hole wall of the connecting hole 53, and the other end of the spring 55 is fixedly connected to the top pillar 52. When the worker does not apply force to the spring 55, the spring 55 is in a deformed state and urges the top pillar 52 to be completely inserted into the insertion hole 51, so that the top pillar 52 is further not easy to affect the injection molding of the transparent member. When the hydraulic cylinder 4 drives the upper die 2 to ascend, so that the fixing rod 54 pushes the top column 52 out of the plug hole 51, the spring 55 further deforms; when the hydraulic cylinder 4 drives the upper die 2 to descend, the spring 55 drives the jack-prop 52 to move and reset.

As shown in fig. 2, the blanking assembly 6 includes a push plate 61 rotatably connected to the bracket 1 through a vertical rod 611, a plurality of rolling grooves 62 are formed in one side of the push plate 61 facing the transparent member on the fixed plate 31, a ball 63 is embedded in each rolling groove 62 in a rolling manner, and a surface portion of the ball 63 protrudes out of the rolling groove 62. When the top pillar 52 ejects the transparent member out of the fixed plate 31, the vertical rod 611 is rotated, the vertical rod 611 drives the push plate 61 to rotate, and the balls 63 on the push plate 61 abut against the transparent member on the fixed plate 31; the transparent member will slide relative to the push plate 61, and the transparent member will drive the balls 63 to roll in the rolling groove 62, so that the sliding friction between the push plate 61 and the transparent member is changed into the rolling friction between the balls 63 and the transparent member, thereby reducing the abrasion of the transparent member.

As shown in fig. 2, a second bevel gear 65 is fixedly sleeved on the vertical rod 611; the second bevel gear 65 is engaged with a first bevel gear 66; a horizontal shaft 67 is fixedly embedded in the first bevel gear 66; the horizontal shaft 67 is rotationally connected to the bracket 1, and a matching gear 68 is fixedly sleeved on the horizontal shaft 67; a rack 69 extending in the vertical direction is engaged with the mating gear 68; the rack 69 is connected to the upper die 2 by a driver; the driving part is a connecting plate 64, one end of the connecting plate 64 is fixedly connected to the rack 69, and the other end of the connecting plate 64 is fixedly connected to the upper die 2.

As shown in fig. 2, when the hydraulic cylinder 4 drives the upper mold 2 to move up and down, the upper mold 2 will drive the rack 69 to move through the connecting plate 64, the rack 69 will drive the mating gear 68, the horizontal shaft 67 and the first bevel gear 66 to rotate, and the first bevel gear 66 will drive the second bevel gear 65, the vertical rod 611 and the push plate 61 to rotate.

As shown in FIG. 2, when the hydraulic cylinder 4 lifts the upper mold 2, the pushing plate 61 pushes the transparent member on the fixed plate 31 to the material collecting assembly 7.

As shown in fig. 4, when the hydraulic cylinder 4 lowers the upper mold 2, the push plate 61 is rotated and reset.

As shown in fig. 4, the material receiving assembly 7 includes a material receiving plate 71 disposed in an inclined manner, a high end of the material receiving plate 71 is fixedly connected to a sidewall of the lower mold 3, a low end of the material receiving plate 71 is fixed on the bracket 1, and a baffle 72 is fixed at the low end of the material receiving plate 71. The transparent piece separated from the fixed plate 31 and pushed by the push plate 61 slides onto the material receiving plate 71, the transparent piece on the material receiving plate 71 slides downwards along the inclined direction of the material receiving plate 71 and abuts against the baffle 72, and the collection of the transparent piece is realized.

As shown in fig. 4, it should be noted that two spacing plates 73 are fixed on the upper surface of the material receiving plate 71, the transparent member sliding on the material receiving plate 71 is located between the two spacing plates 73, and the spacing plates 73 make the transparent member not easily slide off the edge of the material receiving plate 71.

The embodiment of the application provides an injection mold for molding a high-light transparent part at low pressure, and the implementation principle is as follows: in the injection molding process, the hydraulic cylinder 4 drives the upper mold 2 to descend, so that the upper mold 2 and the lower mold 3 are assembled, the fixing plate 31 is embedded in the mold cavity 21, and at the moment, a worker injects the plastic in a molten state into the mold cavity 21 through the injection port 22, and the mold cavity 21 is filled with the plastic solution. Subsequently, the hydraulic cylinder 4 will drive the upper mold 2 to further descend, so that the fixing plate 31 is further embedded into the mold cavity 21, and at this time, the distance between the upper surface of the fixing plate 31 and the top groove wall of the mold cavity 21 will be reduced, thereby realizing the compression of the molten plastic in the mold cavity 21. Finally, the molten plastic in the cavity 21 is cooled and formed, and the high-gloss transparent part is manufactured.

When the hydraulic cylinder 4 drives the upper die 2 to ascend, the fixing rod 54 is gradually embedded into the connecting hole 53; when the fixing rod 54 abuts against the upper end surface of the top pillar 52, the top pillar 52 cannot rise continuously, at this time, the spring 55 deforms further, and at this time, the lower end of the top pillar 52 penetrates through the inserting hole 51 and ejects the transparent member clamped in the mold cavity 21 out of the fixing plate 31.

In the ascending process of the upper die 2, the upper die 2 drives the rack 69 to move through the connecting plate 64, the rack 69 drives the matching gear 68, the horizontal shaft 67 and the first bevel gear 66 to rotate, the first bevel gear 66 drives the second bevel gear 65, the vertical rod 611 and the push plate 61 to rotate, and the push plate 61 pushes the transparent piece on the fixed plate 31 to the material receiving plate 71; the transparent pieces on the material receiving plate 71 slide downwards along the inclined direction of the material receiving plate 71 and abut against the baffle 72, so that the transparent pieces are collected.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. The utility model provides an injection mold of low pressure shaping highlight transparency, includes support (1), last mould (2) and lower mould (3) that the interval set up about being, is equipped with the lift piece that drives mould (2) lift on support (1), and the lower surface of going up mould (2) is equipped with die cavity (21), and the upper surface of lower mould (3) is equipped with fixed plate (31), its characterized in that: the ejection mechanism is characterized by further comprising an ejection assembly (5), wherein the ejection assembly (5) comprises an insertion hole (51) formed in the top groove wall of the die cavity (21), a top column (52) is inserted in the insertion hole (51), the upper end face of the top column (52) abuts against the top hole wall of the insertion hole (51), and the lower end face of the top column (52) is flush with the top groove wall of the die cavity (21); the upper surface of the upper die (2) is provided with a connecting hole (53) communicated with the inserting hole (51), the aperture of the connecting hole (53) is smaller than that of the inserting hole (51), and the bracket (1) is provided with a fixing rod (54) penetrating through the connecting hole (53).

2. The injection mold for low-pressure molding of the high-gloss transparent part according to claim 1, wherein: the side wall of the fixing rod (54) and the hole wall of the connecting hole (53) are arranged at intervals, a spring (55) which enables the upper end face of the top column (52) to abut against the hole wall of the top of the inserting hole (51) is wound outside the fixing rod (54), one end of the spring (55) is fixedly connected to the hole wall of the connecting hole (53), and the other end of the spring (55) is fixedly connected to the top column (52).

3. The injection mold for low-pressure molding of the high-gloss transparent part according to claim 1, wherein: still include unloading subassembly (6), unloading subassembly (6) include through montant (611) rotate connect in push pedal (61) of support (1), push pedal (61) rotate and contradict in the transparent member on fixed plate (31).

4. The injection mold for low-pressure forming of the high-gloss transparent part according to claim 3, wherein: the blanking assembly (6) further comprises a rack (69), a driving piece for driving the rack (69) to move along the length direction of the rack and a horizontal shaft (67) connected to the support (1) in a rotating mode, a matching gear (68) and a first bevel gear (66) are sleeved on the horizontal shaft (67), the matching gear (68) is meshed with the rack (69), a second bevel gear (65) is meshed on the first bevel gear (66), and the second bevel gear (65) is fixedly sleeved on a vertical rod (611).

5. The injection mold for low-pressure forming of the high-gloss transparent part according to claim 4, wherein: the rack (69) extends along the vertical direction, and the driving piece is a connecting plate (64) connected to the rack (69) and the upper die (2).

6. The injection mold for low-pressure forming of the high-gloss transparent part according to claim 3, wherein: a plurality of rolling grooves (62) are formed in the push plate (61), a ball (63) is embedded in each rolling groove (62) in a rolling mode, and the surface portion of each ball (63) protrudes out of each rolling groove (62) and is used for pushing the transparent part to move.

7. The injection mold for low-pressure forming of the high-gloss transparent part according to claim 3, wherein: still including receiving material subassembly (7), receive material subassembly (7) including locating on support (1) and being used for receiving material collecting plate (71) by the transparent member that push pedal (61) promoted, material collecting plate (71) are the slope setting, and receive the high-end connection in lower mould (3) of material platform.

8. The injection mold for low-pressure molding of the high-gloss transparent part according to claim 1, wherein: a plurality of positioning grooves (32) extending along the vertical direction are formed in the lower die (3), and a plurality of positioning rods (23) which are slidably embedded in the corresponding positioning grooves (32) are arranged on the upper die (2).

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