CN112848116B - Double-hole rubber opening separation die - Google Patents

Abstract

The application relates to a double-cavity rubber port separation die which comprises a front die set and a rear die set, wherein the front die set comprises a front die fixing plate, a front die base plate and a front die plate; the back module includes the back mould fixed plate, back mould backing plate, carrier plate and back template, the back template is mosaic structure, the back template includes that one leads the rubber piece, two shaping bottom blocks and two sets of shaping side blocks, every group shaping side block with lead the rubber piece and surround a shaping bottom block jointly with forming type groove, the front template seals type groove in order to form the die cavity, it has seted up and leads the gluey groove to lead the rubber piece top surface, the fixed runner cover that is provided with in front mould fixed plate middle part, first gluey hole has been seted up to the front template, the second gluey hole has been seted up to the front mould backing plate, the runner cover has into the gluey hole, advance the gluey hole, first gluey hole, the second is glued the hole, it communicates in proper order to lead gluey groove and shaping chamber. This application has the effect that improves the fashioned precision of light guide plate in two cave moulds.

Description

Double-cavity rubber opening separation die

Technical Field

The application relates to the field of light guide plate injection molding production, in particular to a double-cavity glue opening separation mold.

Background

The injection molding of the light guide plate is to fill the melted molding material into a closed mold in a high pressure manner, which requires that the light guide plate and the microstructure are simultaneously completed in the injection molding. To meticulous fashioned light guide plate, it is stable in order to control the shaping of light guide plate, generally adopt the single cave shaping, it designs the back template of mould with the moulding cavity an organic whole of light guide plate, perhaps designs the moulding cavity an organic whole of light guide plate on mould benevolence, and inlay mould benevolence and locate the back template, this injection moulding production efficiency who makes the light guide plate is lower, when consequently just having appeared two cave shaping, set up two cavities promptly simultaneously, two cavity simultaneous forming light guide plates, this shaping production efficiency who makes the light guide plate has great promotion. But the shaping of two caves is than single cave shaping degree of difficulty greatly increased, and it is uneven to appear walking to glue easily, leads to the uneven scheduling problem of product thickness for the production precision of light guide plate is lower.

In view of the above-mentioned related art, the inventor believes that the double-cavity injection mold for the light guide plate has a defect of low molding precision of the light guide plate.

Disclosure of Invention

In order to improve the fashioned precision of light guide plate in two cave moulds, this application provides a mouth separation mould is glued to two caves.

The application provides a mouthful separation mould is glued to two caves adopts following technical scheme:

a double-cavity rubber port separation die comprises a front die set and a rear die set, wherein the front die set comprises a front die fixing plate, a front die base plate and a front die plate, and the front die base plate and the front die plate are fixed on the front die fixing plate together through screws; the rear die set comprises a rear die fixing plate, a rear die backing plate, a bearing plate and a rear die plate, the rear die backing plate is fixed on the rear die fixing plate through screws, the rear die backing plate and the bearing plate are fixed on the rear die fixing plate together through screws, the rear die plate is of a splicing structure and comprises a rubber guide block, two forming bottom blocks and two groups of forming side blocks, the rubber guide block is fixed in the middle of the top surface of the bearing plate, the two forming bottom blocks are tightly attached to two sides of the rubber guide block respectively, each group of forming side blocks and the rubber guide block surround one forming bottom block together to form a groove, the groove is sealed by the front die plate to form a cavity, the top surface of the rubber guide block is provided with a rubber guide groove, the rubber guide groove is communicated with the forming grooves on two sides simultaneously, the middle of the front die fixing plate is fixedly provided with a gate sleeve, the front die plate is provided with a first rubber hole, the front die backing plate is provided with a second rubber hole, the gate sleeve is provided with a rubber inlet hole, the first rubber hole, the second rubber guide groove and the forming cavity are sequentially communicated with the forming hole.

Through adopting above-mentioned technical scheme, two sets of shaping side pieces surround in order forming the type groove with the shaping bottom block that leads the gluey piece to correspond respectively, form two type grooves from this simultaneously, and the mould compound die forms two die cavities promptly, can carry out the production of two light guide plates in once moulding plastics, improves production efficiency, reduces the total energy consumption of light guide plate production. And the cavity of the mold can be finely adjusted through the rubber guide block, the molding bottom block and the molding side block, so that the molding precision of the injection molding piece is higher, and the production quality of the light guide plate is improved.

Optionally, a supporting block fixing groove is formed in the top surface of the bearing plate, a supporting block is inserted into the supporting block fixing groove and fixed to the supporting block fixing groove, the side wall of the supporting block is tightly supported on one side, away from the forming bottom block, of the forming side block to limit the forming side block, a hanging table is fixedly arranged on one side, away from the forming side block, of the supporting block, and the hanging table is lapped at a notch of the supporting block fixing groove.

Through adopting above-mentioned technical scheme, support tight piece and contradict in the shaping side piece in order to carry on spacingly to the shaping side piece for the shaping side piece is more stable, supports tight piece and can produce horizontal holding power to the shaping side piece simultaneously, makes the piece of shaping side and shaping bottom block and leads the amalgamation of gluing the piece more stable. Hang the platform overlap joint in the notch department of first fixed slot, on the one hand, hang the platform and make the installation of supporting tight piece more convenient, on the other hand, hang the platform and produce stress with the carrier plate top surface for it is difficult for producing the deflection to support tight piece, further improves the stability of supporting tight effect of supporting tight piece to shaping side piece.

Optionally, the bottom block positioning groove is formed in the top surface of the bearing plate, the forming bottom block is arranged in the bottom block positioning groove, a bottom block base plate is arranged between the forming bottom block and the bottom groove of the bottom block positioning groove, and the forming bottom block and the bottom block base plate are fixed in the bottom block positioning groove through screws.

Through adopting above-mentioned technical scheme, the shaping bottom block is fixed in the bottom block constant head tank, sets up the bottom block backing plate between the tank bottom of shaping bottom block and bottom block constant head tank, and the bottom block backing plate passes through the fix with screw jointly with the shaping bottom block in the bottom block constant head tank, and the bottom block backing plate makes the shaping bottom block can carry out the fine setting of certain degree, improves the installation accuracy of shaping bottom block, and then improves the injection moulding quality of mould.

Optionally, the bottom surface of the molding side block is provided with a central cushion block and an end side cushion block, the central cushion block is fixed to the bearing plate through a screw, the end side cushion block is also fixed to the bearing plate through a screw, and the end side cushion block and the molding side block are fixed to the bearing plate together through a screw.

Through adopting above-mentioned technical scheme, central cushion bears the weight of shaping side piece with end side cushion for shaping side piece can carry out more meticulous regulation, and end side cushion passes through the screw with shaping side piece again and together is fixed in the carrier plate, makes the fixed effect of shaping side piece more stable.

Optionally, the glue guiding block includes a flow channel block and a flow guiding block, the flow channel block is provided with a flow guiding fixing groove, the flow guiding block is fixed in the flow guiding fixing groove, the top of the flow guiding block is higher than the top surface of the flow channel block, and the side edge of the flow guiding block and the top surface of the flow channel block together form the glue guiding groove.

Through adopting above-mentioned technical scheme, lead the gluey piece and form by runner piece and water conservancy diversion piece equipment to this forms leads gluey groove, can go on further meticulous regulation to leading gluey groove through leading gluey piece or water conservancy diversion piece, makes to lead gluey groove and has better gluey effect of leading, and then has better gluey effect of advancing to the die cavity, has higher shaping quality when further ensuring the light guide plate shaping in the die cavity from this.

Optionally, it glues groove and third gluey groove to lead gluey groove to include first gluey groove, second in proper order by the center to both sides, the degree of depth in first gluey groove is between 1mm to 3mm, the degree of depth in second gluey groove is between 0.5mm to 1.5mm, the degree of depth in third gluey groove is between 0.3mm to 1mm, just the degree of depth in first gluey groove is greater than the degree of depth in second gluey groove, the degree of depth in second gluey groove is greater than the degree of depth in third gluey groove.

Through adopting above-mentioned technical scheme, the degree of depth in groove is glued to the third is between 0.3mm to 1mm, the degree of depth setting in groove is glued to the third is corresponding to the thickness of light guide plate product, light guide plate to different thickness can have better shaping effect, the thickness in groove is glued to the second is greater than the thickness in groove is glued to the third, the thickness in first gluey groove is greater than the thickness in groove is glued to the second, make the melting shaping material receive better the gluey effect of leading in leading gluey groove, it is more stable when the die cavity is penetrated to the melting shaping material, it is better to the filling effect of die cavity, further guarantee that the light guide plate in the die cavity has better shaping effect.

Optionally, the front mold fixing plate is fixedly provided with a guide sleeve in a penetrating manner, the guide sleeve is provided with a guide hole, the bearing plate is fixedly provided with a guide pillar, a balance cushion block is fixedly arranged on the bearing plate, the balance cushion block is provided with a yielding hole, and the guide pillar penetrates through the yielding hole and then is inserted into the guide hole of the guide sleeve and is in sliding fit with the guide hole.

Through adopting above-mentioned technical scheme, fixed back template and the balanced cushion of setting of carrier plate top surface, when the mould compound die, preceding template and back template amalgamation, and preceding template is inconsistent with balanced cushion simultaneously, balanced cushion partial pressure. When die holding, correspond the amalgamation condition of front forms and back template, select the balanced cushion of suitable height, balanced cushion can be that the size is all the same, also can be that the size is inequality, position department that stress is big between front forms and back template, use the slightly big balanced cushion of size, position department that stress is little between front forms and back template, use the less balanced cushion of size, all balanced cushions are contradicted with front forms jointly, make the stress between front forms and the back template more even, the stability of die cavity when improving the mould compound die promptly, further improve the shaping effect of light guide plate in the die cavity from this.

Optionally, a mounting hole is formed in the middle of the rear mold base plate, an ejection assembly is arranged in the mounting hole and comprises a thimble, a needle fixing block, a push block and a limiting block, a limiting groove is formed in the push block, the limiting block is inserted into the limiting groove and is in sliding fit with the limiting groove, a limiting fixing groove and a sliding hole are formed in the rear mold fixing plate, the limiting fixing groove is communicated with the sliding hole, the limiting block is fixed in the limiting fixing groove, the push block is arranged in the sliding hole in a sliding manner, the needle fixing block is arranged in the mounting hole in a sliding manner, the push block is fixedly connected with the needle fixing block, and one end of the thimble is fixed to the needle fixing block and the other end of the thimble is penetrated through the bottom wall of the cavity of the mold to push out the injection molding part.

Through adopting above-mentioned technical scheme, when carrying out the injection molding ejecting, exert thrust by the injection molding machine to the ejector pad, the ejector pad moves with the needle fixed block together, the thimble follows the needle fixed block and moves in order ejecting with the injection molding, at this in-process, stopper and spacing groove sliding fit, the stopper produces limiting displacement to the removal of ejector pad and needle fixed block for the removal of ejector pad is more stable, improves the stability of the ejecting effect of injection molding, further ensures that the light guide plate has higher production quality.

Optionally, the needle fixing block is provided with an ejection guide hole, the limiting block is fixed with a guide needle, and the guide needle is inserted into the ejection guide hole and is in sliding fit with the ejection guide hole.

By adopting the technical scheme, the guide pin is inserted into the ejection guide hole and is in sliding fit with the ejection guide hole, when the ejection assembly ejects the injection molding part, the guide pin plays a guiding role in the movement of the needle fixing block, the movement action of the ejector pin is more stable, and the stability of the ejection effect of the injection molding part is further improved.

Optionally, the rear die cushion plate comprises a plurality of rear die cushion blocks, the rear die cushion blocks are spliced to form the rear die cushion plate, and the mounting hole is formed in the middle of the rear die cushion plate.

Through adopting above-mentioned technical scheme, the back mould backing plate is formed by a plurality of pieces together the piece amalgamation for the roughness of back mould backing plate has higher adjustability, can carry out meticulous regulation so that the back mould backing plate has higher roughness to back mould backing plate is whole, and improves the structural stability of whole back module.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the two groups of molding side blocks and the rubber guide blocks respectively surround the corresponding molding bottom blocks to form the grooves, so that two grooves are formed at the same time, the mold is closed to form two cavities, and two light guide plates can be produced in one-time injection molding, so that the production efficiency is improved, and the total energy consumption of the light guide plate production is reduced;

2. the forming bottom block is fixed in the bottom block positioning groove, a bottom block base plate is arranged between the forming bottom block and the bottom block positioning groove, the bottom block base plate enables the forming bottom block to be finely adjusted to a certain degree, the central cushion block and the end side cushion block bear the forming side block, the forming side block can be finely adjusted, a cavity of the die can be finely adjusted through the forming bottom block and the forming side block, the forming precision of an injection molding piece is higher, and the production quality of the light guide plate is improved;

3. the abutting block abuts against the forming side block to limit the forming side block, so that the forming side block is more stable, the hanging table is lapped at the notch of the first fixing groove, on one hand, the hanging table enables the abutting block to be more convenient to install, on the other hand, the hanging table and the top surface of the bearing plate generate stress, the abutting block is not prone to deflection, and the stability of the abutting effect of the abutting block on the forming side block is further improved;

4. when the injection molding is ejected, the limiting block is in sliding fit with the limiting groove, and the limiting block generates limiting effect on the movement of the push block and the needle fixing block, so that the push block is more stable in movement, the stability of ejection effect of the injection molding is improved, and the light guide plate is further ensured to have higher molding production quality.

Drawings

FIG. 1 is an overall three-dimensional view of a mold of an embodiment of the present application when closed.

Fig. 2 is a three-dimensional structural view of a front module in an embodiment of the present application.

Fig. 3 is a view of a partially exploded structure of an embodiment of the present application.

Fig. 4 is a partial exploded view of the rear template in an embodiment of the present application.

Fig. 5 is a view of a partially exploded structure of a rear module in an embodiment of the present application.

Fig. 6 is a relational view of a rear mold shim plate, a rear mold fixing plate and an ejector assembly in an embodiment of the present application.

Fig. 7 is an overall three-dimensional structural view of the ejection assembly in the embodiment of the present application.

Description of reference numerals: 1. a front mold fixing plate; 11. a sprue bush; 111. a glue inlet hole; 12. a guide sleeve; 121. a guide hole; 13. mounting grooves; 2. a front mold backing plate; 21. a second glue hole; 3. a front template; 31. a first glue hole; 4. a rear template; 41. a rubber guide block; 411. a flow passage block; 412. a flow guide block; 42. a glue guiding groove; 421. a first glue tank; 422. a second glue tank; 423. a third glue groove; 43. forming a bottom block; 44. molding a side block; 45. a profiled groove; 5. a carrier plate; 51. a supporting block fixing groove; 52. a bottom block positioning groove; 521. a bottom block backing plate; 53. a central slot; 531. a central cushion block; 54. an end side groove; 541. an end side cushion block; 55. a propping block; 551. hanging a table; 56. a guide post; 57. balancing the cushion block; 571. a hole for abdication; 6. a rear mold backing plate; 61. a rear mold cushion block; 62. mounting holes; 7. a rear mold fixing plate; 71. a limiting fixing groove; 72. a slide hole; 8. ejecting the assembly; 81. a thimble; 82. a needle fixing block; 821. ejecting the guide hole; 83. a push block; 831. a limiting groove; 84. a limiting block; 85. guiding a needle; 86. a guide cylinder; 87. a guide post; 88. a return spring.

Detailed Description

The present application is described in further detail below with reference to figures 1-7.

The embodiment of the application discloses a mouthful separation mould is glued to two caves, refers to fig. 1 and fig. 2, including front module and back module, front module includes front mould fixed plate 1, front mould backing plate 2 and front mould board 3, and front mould backing plate 2 passes through the screw with front mould board 3 and is fixed in front mould fixed plate 1 together. The back module includes back mould fixed plate 7, back mould backing plate 6, carrier plate 5 and back template 4, and back mould backing plate 6 passes through the fix with screw in back mould fixed plate 7 to back mould backing plate 6 is together fixed in back mould fixed plate 7 through the screw with carrier plate 5 again. When the front module and the rear module are combined, the front template 3 and the rear template 4 are mutually spliced to form a cavity for injection molding of the light guide plate.

Referring to fig. 3 and 4, the rear mold plate 4 is a splicing structure, the rear mold plate 4 includes a rubber guide block 41, two molding bottom blocks 43 and two sets of molding side blocks 44, the rubber guide block 41 is rectangular, the rubber guide block 41 is fixed to the middle of the top surface of the carrier plate 5 by countersunk screws, specifically, in combination with fig. 5, the rubber guide block 41 includes a flow channel block 411 and a flow guide block 412, the flow channel block 411 has an approximately "H" shape, flow guide fixing grooves are formed at two ends of the flow channel block 411 in the length direction, the profile of the flow guide block 412 is identical to that of the flow guide fixing grooves, the flow guide block 412 is inserted into the flow guide fixing grooves, the flow channel block 411 and the flow guide block 412 are fixed to the carrier plate 5 by countersunk screws, the top of the flow guide block 412 is higher than the top surface of the flow channel block 411, and the side edges of the flow guide block 412 and the top surface of the flow channel block 411 form a rubber guide groove 42 together. Referring back to fig. 4, the glue guiding groove 42 includes a first glue groove 421, a second glue groove 422 and a third glue groove 423 which are sequentially communicated from the middle part of the runner block 411 to both sides, the length of the first glue groove 421 is gradually increased from the center position of the runner block 411 to one side communicated with the second glue groove 422, the length of the first glue groove 421 is smaller than the length of the forming bottom block 43, and the depth of the first glue groove 421 is between 1mm and 3 mm; the length of the second glue groove 422 is gradually increased from one side communicated with the first glue groove 421 to one side communicated with the third glue groove 423, the maximum length of the second glue groove 422 is equal to the length of the forming bottom block 43, and the depth of the second glue groove 422 is between 0.5mm and 1.5 mm; the length of the third glue groove 423 is uniform and equal to the length of the molding bottom block 43, that is, the length of the third glue groove 423 is equal to the length of the light guide plate product, and the depth of the third glue groove 423 is between 0.3mm and 1 mm. In this embodiment, for a catheter plate with a molding thickness of 0.5mm, the depth of the first glue groove 421 is preferably 2mm, the depth of the second glue groove 422 is preferably 1.2mm, and the depth of the third glue groove 423 is preferably 0.5mm.

Referring to fig. 4 and 5, the forming bottom block 43 is a cube, the forming bottom block 43 is fixed to the carrier plate 5 by countersunk screws, and the two forming bottom blocks 43 are respectively attached to two sides of the runner block 411. The position of the top surface of the carrier plate 5 corresponding to the molded bottom block 43 is provided with a bottom block positioning groove 52, a bottom block base plate 521 is arranged in the bottom block positioning groove 52, the horizontal cross section contour of the bottom block base plate 521 is consistent with that of the molded bottom block 43, the bottom surface of the bottom block base plate 521 is tightly attached to the bottom of the bottom block positioning groove 52, the bottom of the molded bottom block 43 is inserted into the bottom block positioning groove 52, the bottom surface of the molded bottom block 43 is tightly attached to the top surface of the bottom block base plate 521, the top surface of the molded bottom block 43 is slightly lower than that of the rubber guide block 41, and specifically, the height difference between the top surface of the molded bottom block 43 and the top surface of the rubber guide block 41 depends on the thickness of an injection molding piece.

With continued reference to fig. 4 and 5, two sets of molding side blocks 44 correspond to the two molding bottom blocks 43 one-to-one, and each set of molding side blocks 44 and the rubber guide block 41 together surround the corresponding molding bottom block 43 to form a groove 45 of the injection molded part. In this embodiment, each set of forming side blocks 44 includes three forming side blocks 44, each forming side block 44 is fixed to the carrier plate 5 by a countersunk head screw, and the three forming side blocks 44 and the rubber guide block 41 respectively and simultaneously abut against four side walls of the forming bottom block 43. The top surface of the molding side block 44 and the top surface of the rubber guide block 41 are located at the same level. The top surface of the carrier plate 5 corresponding to each forming side block 44 is further provided with a central groove 53 and two end side grooves 54, and the central groove 53 and the end side grooves 54 are both communicated with the bottom block positioning groove 52. A center pad 531 is inserted into the center groove 53, the center pad 531 is fixed in the center groove 53 by a countersunk screw, the top surface of the center pad 531 abuts against the middle of the bottom surface of the molded side block 44, an end side pad 541 is inserted into the end side groove 54, the end side pads 541 are fixed in the end side groove 54 by countersunk screws, and the top surfaces of the two end side pads 541 abut against the two ends of the bottom surface of the molded side block 44 respectively. In this embodiment, preferably, the side edge of the central cushion block 531 abuts against the forming bottom block 43 at the same time, so that the combining of the forming bottom block 43 and the flow channel block 411 is more stable. In order to make the combination of the molding side block 44, the molding bottom block 43 and the glue guide block 41 more compact and stable, a pressing block 55 is also fixedly arranged on the carrier plate 5. The top surface of the carrier plate 5 is provided with a supporting block fixing groove 51 corresponding to the supporting block 55, and the supporting block 55 is inserted into the corresponding supporting block fixing groove 51 and fixed in the supporting block fixing groove 51 through a countersunk head screw. Specifically, in the present embodiment, a pressing block 55 is disposed on a side of each of the forming side blocks 44 away from the forming bottom block 43, and the six pressing blocks 55 jointly press all the forming side blocks 44 toward the center. The supporting block 55 is away from the rubber guiding block 41, a hanging platform 551 is integrally formed on one side of the supporting block 55, the hanging platform 551 is located at the top of the supporting block 55, and the bottom surface of the hanging platform 551 is tightly attached to the top surface of the bearing plate 5.

Referring to fig. 2, a mounting groove 13 is formed in the bottom surface of the front mold fixing plate 1, the front mold backing plate 2 is fixed to the bottom of the mounting groove 13 by screws, the front mold plate 3 is inserted into the mounting groove 13 and abuts against the front mold backing plate 2, and the front mold plate 3 and the front mold backing plate 2 are fixed to the mounting groove 13 together by screws. In this embodiment, it should be noted that the thickness of the front mold backing plate 2 is less than the thickness of the mounting groove 13, and the sum of the thickness of the front mold backing plate 2 and the thickness of the front mold plate 3 is greater than the thickness of the mounting groove 13, so that the front mold plate 3 can be stably inserted into the mounting groove 13, and a good mounting effect is achieved on the front mold plate 3, and meanwhile, the front mold plate 3 is prevented from being recessed into the mounting groove 13, so that the front mold plate 3 has a stable sealing effect on the cavity. In this embodiment, preferably, the front template 3 includes two front template jointed boards, the two front template jointed boards are in the shape of a plate with the same size, the side edges of the two front template jointed boards, which are mutually attached, are both provided with first half grooves, and the two first half grooves are spliced to form the first glue hole 31; front mould backing plate 2 includes two front mould pad makeup, and two front mould pad makeup are the platelike of size the same, and half groove of second has all been seted up to the side that two front mould pad makeup laminated each other, and half groove amalgamation of two seconds forms second and glues hole 21. Referring to fig. 3, a sprue bush 11 is fixedly inserted through the middle of the front mold fixing plate 1, the sprue bush 11 has a glue inlet hole 111, and the glue inlet hole 111, the second glue hole 21, the first glue hole 31, the glue guide groove 42 and the cavity are sequentially communicated.

Referring to fig. 3, the guide sleeves 12 are respectively and fixedly arranged at four corners of the front mold fixing plate 1, the guide sleeves 12 are cylindrical, the guide sleeves 12 are provided with guide holes 121, guide pillars 56 are respectively and fixedly arranged at four corners of the carrier plate 5, the guide pillars 56 are cylindrical, and the four guide pillars 56 are in one-to-one insertion connection with the four guide sleeves 12 and are in sliding fit with each other to guide the mold closing and opening of the mold. The four corners position department of carrier plate 5 top surface is provided with balanced cushion 57, and balanced cushion 57 passes through countersunk screw to be fixed in the carrier plate 5 top surface, and the top surface of balanced cushion 57 and the top surface of shaping side piece 44 are located the coplanar. The positions of the four balance cushion blocks 57 correspond to the positions of the four guide pillars 56 one by one, the balance cushion blocks 57 are respectively provided with a yielding hole 571, and the guide pillars 56 penetrate through the yielding holes 571 of the balance cushion blocks 57 at the corresponding positions and then are inserted into the corresponding guide holes 121 of the guide sleeves 12 and are in sliding fit with the guide holes 121. In order to reduce the friction of the inner wall of the relief hole 571 against the guide pillar 56, in the present embodiment, the diameter of the relief hole 571 is larger than the diameter of the guide pillar 56. In order to make the guide pillar 56 and the guide sleeve 12 more smoothly inserted, in this embodiment, the top end of the guide pillar 56 is rounded and the bottom end of the guide sleeve 12 is rounded, so as to reduce the possibility of rigid collision between the guide pillar 56 and the guide sleeve 12 during insertion.

Referring to fig. 1 and 6, the rear die backing plate 6 includes a plurality of rear die cushion blocks 61, all the rear die cushion blocks 61 are assembled together to form the rear die backing plate 6, and a mounting hole 62 is formed in the middle of the rear die backing plate 6. The mounting hole 62 is provided with the ejector assembly 8.

Referring to fig. 6 and 7, the ejection assembly 8 includes an ejector pin 81, a pin fixing block 82, and a push block 83. In this embodiment, the mounting hole 62 is preferably a square hole, the needle fixing block 82 is a square block having a contour shape identical to the contour shape of the mounting hole 62, the needle fixing block 82 is slidably disposed in the mounting hole 62, the ejector pin 81 is disposed in the middle of the needle fixing block 82, the bottom end of the ejector pin 81 is fixed to the needle fixing block 82, and the other end of the ejector pin 81 penetrates through the bottom wall of the cavity of the mold to eject the injection molding part. The needle fixing block 82 penetrates through and is fixedly provided with a guide cylinder 86, the guide cylinder 86 is a cylinder with the height being consistent with that of the needle fixing block 82, a guide post 87 is inserted into the guide cylinder 86, with reference to fig. 3, the top end of the guide post 87 is fixed on the bearing plate 5, the bottom end of the guide post 87 is fixed on the rear mold fixing plate 7, and the guide post 87 guides and limits the movement of the needle fixing block 82. In this embodiment, still the cover is equipped with reset spring 88 on guide post 87, and reset spring 88's top is contradicted in the carrier plate 5 bottom surface, and reset spring 88's bottom is contradicted in needle fixed block 82 top surface, and injection molding is ejecting back, and ejector pad 83 and needle fixed block 82 can be under reset spring 88's elastic force effect automatic re-setting.

Referring to fig. 6 and 7, a position corresponding to the needle fixing block 82 in the middle of the rear mold fixing plate 7 is provided with a limiting fixing groove 71 and a sliding hole 72, the sliding hole 72 vertically penetrates through the rear mold fixing plate 7, the limiting fixing groove 71 is provided by the top surface of the rear mold fixing plate 7, that is, the limiting fixing groove 71 is arranged at the top end of the sliding hole 72, the limiting fixing groove 71 is communicated with the sliding hole 72, and the push block 83 is inserted into the sliding hole 72 and is in sliding fit with the sliding hole 72. The push block 83 and the needle fixing block 82 are fixed by a countersunk screw, so that the push block 83 can drive the needle fixing block 82 to move to control the ejection of the thimble 81. The top surface of the pushing block 83 is provided with a limiting groove 831, and the limiting groove 831 is communicated with the limiting fixing groove 71. The limiting block 84 is fixedly arranged in the limiting fixing groove 71 through a countersunk screw, and the limiting block 84 simultaneously penetrates through the limiting groove 831 and is in sliding fit with the limiting groove 831. When the push block 83 moves together with the needle fixing block 82, the stopper 84 produces a stopper effect on the movement of the push block 83 and the needle fixing block 82. A guide pin 85 is fixedly arranged in the middle of the top surface of the limiting block 84, an ejection guide hole 821 is formed in the bottom surface of the needle fixing block 82, the guide pin 85 is inserted into the ejection guide hole 821 and is in sliding fit with the ejection guide hole 821, and when the push block 83 and the needle fixing block 82 move together, the guide pin 85 guides and limits the needle fixing block 82 so that the ejection effect of the ejector pin 81 is more stable.

The implementation principle of the double-hole rubber mouth separation die in the embodiment of the application is as follows: two sets of shaping side pieces 44 surround the shaping bottom piece 43 that corresponds with leading gluey piece 41 respectively in order to form type groove 45, form two type grooves 45 simultaneously from this, and the mould compound die forms two die cavities promptly, can carry out the production of two light guide plates in once moulding plastics, improves production efficiency, reduces the total energy consumption of light guide plate production. And, the die cavity of mould can carry out fine adjustment through leading gluey piece 41, shaping bottom block 43 and shaping side block 44, every shaping side block 44 bottom surface all is provided with central cushion 531 and distolateral cushion 541, central cushion 531 supports the shaping side block 44 that the position corresponds simultaneously with distolateral cushion 541, central cushion 531 makes shaping side block 44 have better adjustability with distolateral cushion 541, can carry out the regulation and control of better precision to the die cavity, make the shaping precision of injection molding higher, improve the quality of light guide plate production.

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 (9)

1. The utility model provides a mouth separation mould is glued to two caves which characterized in that: the die comprises a front die set and a rear die set, wherein the front die set comprises a front die fixing plate (1), a front die base plate (2) and a front template (3), and the front die base plate (2) and the front template (3) are fixed on the front die fixing plate (1) together through screws; the rear die set comprises a rear die fixing plate (7), a rear die backing plate (6), a bearing plate (5) and a rear die plate (4), the rear die backing plate (6) is fixed on the rear die fixing plate (7) through screws, the rear die backing plate (6) is fixed on the rear die fixing plate (7) together with the bearing plate (5) through screws, the rear die plate (4) is of a splicing structure, the rear die plate (4) comprises a rubber guide block (41), two forming bottom blocks (43) and two groups of forming side blocks (44), the rubber guide block (41) is fixed in the middle of the top surface of the bearing plate (5), the two forming bottom blocks (43) are tightly attached to two sides of the rubber guide block (41) respectively, each group of forming side blocks (44) and the rubber guide block (41) surround one forming bottom block (43) together to form a groove (45), the front die plate (3) seals the groove (45) to form a die cavity, the rubber guide groove (42) is formed in the top surface of the rubber guide block (41), the rubber guide groove (42) and the rubber guide block (42) are communicated with the front die fixing holes (11) in the middle of the front die fixing plate (1), a second die fixing plate (21) is arranged on the front die fixing plate (21), the sprue bush (11) is provided with a glue inlet hole (111), and the glue inlet hole (111), the first glue hole (31), the second glue hole (21), the glue guide groove (42) and the cavity are communicated in sequence;

a mounting hole (62) is formed in the middle of the rear die base plate (6), an ejection assembly (8) is arranged in the mounting hole (62), the rear die base plate (6) comprises a plurality of rear die cushion blocks (61), the rear die cushion blocks (61) are spliced to form the rear die base plate (6), and the mounting hole (62) is formed in the middle of the rear die base plate (6);

the glue guide block (41) comprises a flow channel block (411) and a flow guide block (412), the outline of the flow channel block (411) is similar to an H shape, flow guide fixing grooves are formed in two ends of the flow channel block (411) in the length direction, the outline of the flow guide block (412) is consistent with the outline of the flow guide fixing grooves, the flow guide block (412) is inserted into the flow guide fixing grooves, the flow channel block (411) and the flow guide block (412) are respectively fixed on the bearing plate (5), the top of the flow guide block (412) is higher than the top surface of the flow channel block (411), and the side edge of the flow guide block (412) and the top surface of the flow channel block (411) form a glue guide groove (42) together;

the glue guide groove (42) comprises a first glue groove (421), a second glue groove (422) and a third glue groove (423) which are sequentially communicated from the middle part of the runner block (411) to two sides, the length of the first glue groove (421) is gradually increased from the center position of the runner block (411) to one side communicated with the second glue groove (422), the length of the first glue groove (421) is smaller than that of the forming bottom block (43), the length of the second glue groove (422) is gradually increased from one side communicated with the first glue groove (421) to one side communicated with the third glue groove (423), the maximum length of the second glue groove (422) is equal to that of the forming bottom block (43), the length of the third glue groove (423) is uniform and equal to that of the forming bottom block (43), so that the length of the third glue groove (423) is equal to the length of a light guide plate product, the depth of the first glue groove (421) is greater than that of the second glue groove (422), and the depth of the second glue groove (422) is greater than that of the third glue groove (423).

2. The dual-cavity gate separation die of claim 1, wherein: the top surface of the bearing plate (5) is provided with a supporting block fixing groove (51), a supporting block (55) is inserted into the supporting block fixing groove (51) and fixed in the supporting block fixing groove, the side wall of the supporting block (55) is tightly supported on one side, away from the forming bottom block (43), of the forming side block (44) to limit the forming side block (44), a hanging table (551) is fixedly arranged on one side, away from the forming side block (44), of the supporting block (55), and the hanging table (551) is lapped at a notch of the supporting block fixing groove (51).

3. The double-cavity rubber-mouth separation die according to claim 1, characterized in that: bottom block constant head tank (52) have been seted up to carrier plate (5) top surface, shaping bottom block (43) set up in bottom block constant head tank (52), shaping bottom block (43) with be provided with bottom block backing plate (521) between the tank bottom of bottom block constant head tank (52), shaping bottom block (43) with bottom block backing plate (521) are jointly through the fix with screw in bottom block constant head tank (52).

4. The dual-cavity gate separation die of claim 1, wherein: the bottom surface of the molding side block (44) is provided with a central cushion block (531) and an end side cushion block (541), the central cushion block (531) is fixed on the bearing plate (5) through screws, the end side cushion block (541) is also fixed on the bearing plate (5) through screws, and the end side cushion block (541) and the molding side block (44) are fixed on the bearing plate (5) through screws together.

5. The double-cavity rubber-mouth separation die according to claim 1, characterized in that: the glue guiding block (41) comprises a flow channel block (411) and a flow guiding block (412), a flow guiding fixing groove is formed in the flow channel block (411), the flow guiding block (412) is fixed in the flow guiding fixing groove, the top of the flow guiding block (412) is higher than the top surface of the flow channel block (411), and the side edge of the flow guiding block (412) and the top surface of the flow channel block (411) jointly form the glue guiding groove (42).

6. The dual-cavity gate separation die of claim 1, wherein: the depth of the first glue groove (421) is between 1mm and 3mm, the depth of the second glue groove (422) is between 0.5mm and 1.5mm, and the depth of the third glue groove (423) is between 0.3mm and 1 mm.

7. The dual-cavity gate separation die of claim 1, wherein: front mould fixed plate (1) runs through and is fixed with guide pin bushing (12), guide pin bushing (12) have guiding hole (121), carrier plate (5) are fixed with guide pillar (56), the fixed balanced cushion (57) that is provided with on carrier plate (5), balanced cushion (57) have been seted up and have been stepped down hole (571), guide pillar (56) pass insert behind stepping down hole (571) in guiding hole (121) of guide pin bushing (12) and with guiding hole (121) sliding fit.

8. The double-cavity rubber-mouth separation die according to claim 1, characterized in that: ejecting subassembly (8) include thimble (81), needle fixed block (82), ejector pad (83) and stopper (84), spacing groove (831) have been seted up in ejector pad (83), stopper (84) insert in spacing groove (831) and with spacing groove (831) sliding fit, spacing fixed slot (71) and slide opening (72) have been seted up in back mould fixed plate (7), spacing fixed slot (71) with slide opening (72) communicate each other, stopper (84) are fixed in spacing fixed slot (71), ejector pad (83) slide set up in slide opening (72), needle fixed block (82) slide set up in mounting hole (62), ejector pad (83) with needle fixed block (82) fixed connection, thimble (81) one end is fixed in needle fixed block (82) and the other end run through to the die cavity diapire of mould in order to be used for ejecting injection molding.

9. The dual-pocket gate separation die of claim 8, wherein: the needle fixing block (82) is provided with an ejection guide hole (821), the limiting block (84) is fixedly provided with a guide needle (85), and the guide needle (85) is inserted into the ejection guide hole (821) and is in sliding fit with the ejection guide hole (821).

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