CN209903800U

CN209903800U - Compression mold capable of improving molding quality of mobile phone rear cover

Info

Publication number: CN209903800U
Application number: CN201920621305.2U
Authority: CN
Inventors: 廖文亮
Original assignee: Suzhou Bright Mould Technology Co Ltd
Current assignee: Suzhou Bright Mould Technology Co Ltd
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2020-01-07
Anticipated expiration: 2029-04-30

Abstract

The utility model discloses a can improve compression mould of lid shaping quality behind cell-phone, it relates to lid mould field behind the cell-phone. Aims to solve the problem of low product quality when the traditional injection molding is used for forming large-area thin-wall products. The key points of the technical scheme comprise: the fixed die assembly comprises a cover die and a bottom die; a first brace assembly for carrying the cover mold; the second support plate assembly is used for bearing the bottom die; the disc spring groups are borne between the first support plate component and the second support plate component; the limiting assembly is borne between the first support plate assembly and the second support plate assembly; the disc spring assembly is in a compressed state, and the limiting assembly is used for limiting the compression distance of the first support plate assembly and the second support plate assembly moving relatively along the central axis direction of the disc spring assembly. The utility model discloses reached and improved lid surface quality behind the cell-phone, reduced the rainbow line, reduced product appearance defect and increased product density's effect.

Description

Compression mold capable of improving molding quality of mobile phone rear cover

Technical Field

The utility model relates to a lid mould field behind the cell-phone, more specifically say, it relates to a can improve lid forming quality's behind cell-phone compression mould.

Background

An injection mold is a tool for producing plastic products and also a tool for giving the plastic products complete structure and precise dimensions. Injection molding is a processing method used for mass production of parts with complex shapes, and particularly, plastic melted by heat is injected into a mold cavity from an injection molding machine at high pressure, and a formed product is obtained after cooling and solidification.

Traditional injection molding is often not confident in forming large area thin-walled articles, with the result often being a designer's compromise: the thickness of the product is increased, and the color value of the product is reduced to meet the requirement of common production. This result is due to the deficiencies of conventional injection molding:

(1) when the common injection molding is used for forming a thin-wall product, the injection pressure is inevitably increased to meet the requirement of a plastic process, otherwise, the cavity is not filled. The high injection pressure causes large internal stress of products, the warp size of the products is out of tolerance or the products are cracked and deformed by stress after standing, and the assembly size precision requirement or the durability of the products can not be met.

(2) The common injection molding sol fills a cavity from a narrow runner system, the injection molding pressure near a gate is high, appearance defects (especially transparent PC (polycarbonate) materials) are easily generated near the gate, and the requirements of optical performance and appearance product cannot be met.

(3) Transparent PC cell-phone back of body lid, the rainbow line appears in ordinary injection molding surface very high probability, can not satisfy the appearance requirement, and adopts and does not produce rainbow line raw materials, will face the difficult problem that the cost sharply increases again.

(4) The pressure maintaining mode of common injection molding has the defects that the sol surface far away from the gate part is solidified at the earliest time, so that sufficient pressure maintaining is not obtained, the fine appearance effect of a mold is difficult to reproduce, and the appearance of a thin-wall product far away from the gate part is not perfect.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a can improve lid shaping quality's behind cell-phone compression mould, it has following advantage: (1) smaller injection molding pressure is needed, so that the appearance defects of the product can be reduced; (2) because only small shear stress exists in the melt, the internal stress of the product is small, the pressure maintaining pressure is more uniform, the surface quality of the product can be improved, and the rainbow lines are reduced; (3) the product density is increased, the internal stress is reduced, the chemical resistance of the product is stronger, and the hardness of the product can be made higher by using the hardening liquid with higher grade.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a compression mould capable of improving the forming quality of a mobile phone rear cover comprises:

the fixed die assembly comprises a cover die and a bottom die;

a first brace assembly for carrying the cover mold;

the second support plate assembly is used for bearing the bottom die;

the disc spring groups are borne between the first support plate component and the second support plate component; and the number of the first and second groups,

the limiting component is borne between the first support plate component and the second support plate component;

the disc spring assembly is in a compressed state, and the limiting assembly is used for limiting the compression distance of the first support plate assembly and the second support plate assembly moving relatively along the central axis direction of the disc spring assembly.

The second support plate component comprises a first support plate, a second support plate, a third support plate, a fourth support plate and an eighth support plate connected with the bottom die in sequence, and the first support plate component comprises a seventh support plate, a sixth support plate and a fifth support plate opposite to the fourth support plate in sequence; the cover die is embedded in the sixth support plate, and the bottom die and the eighth support plate are embedded in the fifth support plate.

Furthermore, a plurality of positioning holes for accommodating the disc spring group are formed in the fourth support plate.

Furthermore, the limiting assembly comprises a plurality of limiting sleeves embedded in the fifth support plate, and limiting bolts connected with the fourth support plate penetrate through the limiting sleeves; the stop collar is movable relative to the fifth fulcrum plate.

Furthermore, a limiting branch part is arranged at one end, far away from the fourth support plate, of the outer side wall of the limiting sleeve in an extending mode, and a limiting hole matched with the limiting sleeve and a limiting sinking groove matched with the limiting branch part are formed in the fifth support plate; when the end faces of the fourth support plate and the fifth support plate are in contact, the shortest distance between the bottom wall in the limiting sinking groove and the end face of the limiting support part is the compression distance.

Furthermore, a plurality of guide posts penetrating through the fifth support plate and the sixth support plate are uniformly distributed on the fourth support plate, a first sliding sleeve matched with the guide posts is embedded in the fifth support plate, and a second sliding sleeve matched with the guide posts is embedded in the sixth support plate.

Furthermore, a plurality of positioning devices are uniformly distributed between the fifth support plate and the sixth support plate, and each positioning device comprises a convex positioning bottom plate which is embedded on the fifth support plate and a concave positioning top plate which is embedded on the sixth support plate.

Furthermore, a plurality of clamping devices are arranged between the fifth support plate and the sixth support plate, each clamping device comprises a fixed clamping plate hinged to the outer side wall of the sixth support plate and a fixed bolt screwed on the outer side wall of the fifth support plate, and a fixed clamping groove matched with the fixed bolt is formed in each fixed clamping plate.

Further, the fixed die assembly comprises two groups of cover dies and a bottom die, a middle die cover plate connected with the sixth supporting plate is arranged between the cover dies, and a middle die bottom plate connected with the fifth supporting plate is arranged between the bottom die.

Furthermore, side template assemblies surrounding the two bottom dies are embedded in the fifth support plate, abdicating grooves are formed in the side walls of the bottom dies, and rolling rods in contact with the side template assemblies are arranged in the abdicating grooves; the chip groove has been seted up to the die block lateral wall, chip groove one end with the groove intercommunication of stepping down, the other end extends to the die block with the terminal surface of eighth extension board contact.

To sum up, the utility model discloses following beneficial effect has:

1. smaller injection molding pressure is needed, so that the appearance defects of the product can be reduced;

2. because only small shear stress exists in the melt, the internal stress of the product is small, the pressure maintaining pressure is more uniform, the surface quality of the product can be improved, and the rainbow lines are reduced;

3. the product density is increased, the internal stress is reduced, the chemical resistance of the product is stronger, and the hardness of the product can be higher by using a higher-grade hardening liquid;

4. smaller mold locking force is needed, a small machine has the opportunity to realize multi-mold-cavity production, and the efficiency is improved;

5. the label machine can be used for modification, so that the equipment investment is reduced;

6. the problems of hardening and cracking and local chromatic aberration during injection molding are solved, the problem of local glue thin filling is solved, the product flatness is improved, the problem of large heating deformation of the subsequent process is solved, and the dimensional stability of injection molding is improved.

Drawings

FIG. 1 is a schematic view of the overall structure of a compression mold capable of improving the molding quality of a mobile phone rear cover in an embodiment;

FIG. 2 is a first cross-sectional view of a compression mold capable of improving molding quality of a mobile phone rear cover in an embodiment;

FIG. 3 is an exploded view of a stationary mold assembly in an embodiment;

FIG. 4 is a sectional view of a stationary mold assembly in an embodiment;

FIG. 5 is a second cross-sectional view of a compression mold capable of improving molding quality of a rear cover of a mobile phone in an embodiment;

FIG. 6 is an enlarged view of portion A of FIG. 5;

FIG. 7 is a schematic structural diagram of the positioning device and the fastening device in the embodiment;

FIG. 8 is a schematic structural diagram of a sixth supporting plate and a fixing clip in the embodiment.

In the figure: 1. a first support plate; 11. a first bolt; 2. a second support plate; 3. a third support plate; 31. a third bolt; 4. a fourth support plate; 41. a fourth bolt; 42. positioning holes; 43. a disc spring set; 44. a guide post; 5. a fifth support plate; 51. an eighth support plate; 52. a fifth bolt; 53. a first sliding sleeve; 54. a limit bolt; 55. a limiting sleeve; 551. a limiting branch part; 561. a limiting hole; 562. limiting the sink groove; 57. a sliding hole; 6. a sixth support plate; 61. a sixth bolt; 62. a lower feed inlet; 63. a second sliding sleeve; 7. a seventh support plate; 71. a seventh bolt; 72. an upper feed inlet; 81. covering the mold; 82. bottom die; 821. a yielding groove; 822. rolling a rod; 83. a first side form; 84. a middle mold bottom plate; 85. a middle die cover plate; 86. a material injection pipe; 861. a material injection hole; 87. a thimble; 88. a second side form; 91. positioning a top plate; 92. positioning the bottom plate; 93. fixing the clamping plate; 94. fixing the bolt; 95. and fixing the clamping groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Example (b):

a compression mould capable of improving the molding quality of a mobile phone rear cover refers to fig. 1 and 2 and comprises a fixed mould component, a first support plate component and a second support plate component; the first support plate component comprises a fifth support plate 5, a sixth support plate 6 and a seventh support plate 7 which are sequentially connected, the fifth support plate 5 is connected with the sixth support plate 6 through two clamping devices, and the sixth support plate 6 is connected with the seventh support plate 7 through a plurality of seventh bolts 71; the second support plate component comprises a first support plate 1, a second support plate 2, a third support plate 3, a fourth support plate 4 and an eighth support plate 51 which are sequentially connected, the first support plate 1, the second support plate 2, the third support plate 3 and the fourth support plate 4 are connected through a plurality of first bolts 11, a plurality of third bolts 31 are further connected between the third support plate 3 and the fourth support plate 4, and the fourth support plate 4 and the eighth support plate 51 are connected through a plurality of fourth bolts 41.

Referring to fig. 2 and 3, the fixed mold assembly in this embodiment includes two cover molds 81, two bottom molds 82, a middle mold cover plate 85 between the two cover molds 81, a middle mold bottom plate 84 between the two bottom molds 82, and a sideform assembly surrounding the two bottom molds 82, the sideform assembly including two first sideform plates 83 and two second sideform plates 88; a complete cavity is formed between the two cover dies 81, the middle die cover plate 85, the two bottom dies 82, the middle die bottom plate 84 and the side die plate assembly, a die cavity for forming the rear cover of the mobile phone is formed between the cover dies 81 and the bottom dies 82, the space of the die cavity is larger than the space of the two die cavities, and then the allowance is left on the side edge of the formed rear cover of the mobile phone, so that the rear process processing is facilitated.

Referring to fig. 2 and 3, a cover die 81 and a middle die cover plate 85 are embedded in the sixth support plate 6, the cover die 81 and the sixth support plate 6 are connected through a plurality of sixth bolts 61, and the middle die cover plate 85 and the sixth support plate 6 are connected through bolts (not shown in the drawings); the bottom die 82, the middle die bottom plate 84 and the side die plate assemblies are embedded in the fifth support plate 5, the bottom die 82 is connected with the eighth support plate 51 through a plurality of fifth bolts 52, and the side die plate assemblies and the middle die bottom plate 84 are connected with the fifth support plate 5 through bolts; in this embodiment, a sliding hole 57 engaged with the eighth support plate 51 is formed in the fifth support plate 5, and the eighth support plate 51 is in clearance fit with the sliding hole 57, so that the eighth support plate 51 can move relative to the sliding hole 57.

Referring to fig. 2 and 4, the seventh supporting plate 7 is provided with an upper feeding port 72, and the sixth supporting plate 6 is provided with a lower feeding port 62 opposite to the upper feeding port 72; a material injection pipe 86 penetrating through the middle die cover plate 85 is embedded in the inner bottom wall of the lower feed port 62, and a material injection hole 861 communicating the upper feed port 72, the lower feed port 62 and the die cavity is formed in the middle of the material injection pipe 86; a thimble 87 opposite to the material injection hole 861 is arranged in the middle of the middle die bottom plate 84 in a penetrating manner, and the end part of the thimble 87 is in a conical shape and is embedded into the material injection hole 861.

Referring to fig. 4, a yielding groove 821 is formed in the side wall of the bottom die 82, and a roller 822 contacting with the sideform assembly is arranged in the yielding groove 821; a chip groove (not shown in the drawing) is formed in the side wall of the bottom die 82, one end of the chip groove is communicated with the abdicating groove 821 close to the cover die 81, and the other end of the chip groove extends to the end surface of the bottom die 82; metal chips generated by friction between the bottom die 82 and the side die plate enter the abdicating groove 821 under the action of the roller 822 and are discharged through the chip grooves, so that the metal chips can be prevented from entering the die cavity and affecting the product quality.

Referring to fig. 2, a plurality of disc spring groups 43 are arranged between the first support plate assembly and the second support plate assembly, a plurality of positioning holes 42 are uniformly distributed in the fourth support plate 4 in the embodiment, and the disc spring groups 43 are embedded in the positioning holes 42; one end of the disc spring set 43 is abutted against the third support plate 3, the other end is abutted against the fifth support plate 5, and the disc spring set 43 is in a compressed state.

Referring to fig. 5, a limiting assembly is arranged between the first support plate assembly and the second support plate assembly, and the limiting assembly is used for limiting the compression distance of the relative movement of the first support plate assembly and the second support plate assembly along the central axis direction of the disc spring assembly (refer to fig. 2); the limiting assembly in this embodiment includes a limiting sleeve 55 embedded in the fifth support plate 5, and a limiting bolt 54 connected with the fourth support plate 4 penetrates through the middle of the limiting sleeve 55.

Referring to fig. 5 and 6, a limit branch 551 is extended from one end of the outer side wall of the limit sleeve 55 far away from the fourth support plate 4, and a limit hole 561 matched with the limit sleeve 55 and a limit sink 562 matched with the limit branch 551 are formed in the fifth support plate 5; when the end surfaces of the fourth support plate 4 and the fifth support plate 5 are contacted, the shortest distance between the bottom wall in the limit sunken groove 562 and the end surface of the limit support part 551 is the compression distance.

Referring to fig. 5, a plurality of guide posts 44 penetrating through a fifth support plate 5 and a sixth support plate 6 are uniformly distributed on the fourth support plate 4, a first sliding sleeve 53 matched with the guide posts 44 is embedded in the fifth support plate 5, and a second sliding sleeve 63 matched with the guide posts 44 is embedded in the sixth support plate 6; the guide post 44 cooperates with the first sliding sleeve 53 and the second sliding sleeve 63 to play a guiding role, so that the stability can be improved.

Referring to fig. 7 and 8, the clamping device includes a fixing clamping plate 93 hinged to the outer side wall of the sixth support plate 6, and a fixing bolt 94 rotatably disposed on the outer side wall of the fifth support plate 5, and a fixing clamping slot 95 matched with the fixing bolt 94 is formed in the fixing clamping plate 93; in the embodiment, the fixing clamping plate 93 is connected with the sixth supporting plate 6 through the bolt, so that the fixing clamping plate 93 can rotate by taking the bolt as an axis; in this embodiment, the two clamping devices are respectively disposed on two opposite sidewalls of the sixth supporting plate 6 and are disposed in a non-centering manner, so that the connection stability of the fifth supporting plate 5 and the sixth supporting plate 6 can be improved; four positioning devices are uniformly distributed between the fifth support plate 5 and the sixth support plate 6, and each positioning device comprises a convex positioning bottom plate 92 embedded on the fifth support plate 5 and a concave positioning top plate 91 embedded on the sixth support plate 6; the positioning bottom plate 92 is matched with the positioning top plate 91, so that the connection accuracy of the fifth support plate 5 and the sixth support plate 6 can be improved.

The working principle is as follows:

injecting melted plastics into the cavity through the material injection hole 861, wherein under the elastic action of the disc spring group 43, the end surface of the limiting branch 551 is contacted with the inner bottom wall of the limiting sink 562, and the thickness of the formed mobile phone rear cover is larger than the preset thickness;

the injection molding machine drives the second support plate component to move against the elastic force of the disc spring group 43, so that the fourth support plate 4 is in contact with the fifth support plate 5, the distance between the bottom die 82 and the cover die 81 is compressed, and the mobile phone rear cover is formed to be in a preset thickness.

Claims

1. The utility model provides a can improve lid forming quality's behind cell-phone compression mould which characterized in that includes:

the fixed die assembly comprises a cover die (81) and a bottom die (82);

a first support plate assembly for carrying the cover mold (81);

a second plate assembly for carrying the bottom die (82);

a plurality of disc spring sets (43) carried between the first and second leg plate assemblies; and the number of the first and second groups,

the disc spring group (43) is in a compressed state, and the limiting component is used for limiting the compression distance of the relative movement of the first support plate component and the second support plate component along the central axis direction of the disc spring group (43).

2. The compression mold capable of improving molding quality of the mobile phone rear cover according to claim 1, characterized in that: the second support plate component comprises a first support plate (1), a second support plate (2), a third support plate (3), a fourth support plate (4) and an eighth support plate (51) connected with the bottom die (82) which are sequentially connected, and the first support plate component comprises a seventh support plate (7), a sixth support plate (6) and a fifth support plate (5) opposite to the fourth support plate (4) which are sequentially connected; the cover die (81) is embedded in the sixth support plate (6), and the bottom die (82) and the eighth support plate (51) are embedded in the fifth support plate (5).

3. The compression mold capable of improving molding quality of the mobile phone rear cover according to claim 2, characterized in that: and a plurality of positioning holes (42) for accommodating the disc spring group (43) are formed in the fourth support plate (4).

4. The compression mold capable of improving molding quality of the mobile phone rear cover according to claim 2, characterized in that: the limiting assembly comprises a plurality of limiting sleeves (55) embedded in the fifth support plate (5), and limiting bolts (54) connected with the fourth support plate (4) penetrate through the limiting sleeves (55); the stop sleeve (55) can be moved relative to the fifth bearing plate (5).

5. The compression mold capable of improving molding quality of the mobile phone rear cover according to claim 4, wherein: a limiting support part (551) is arranged at one end, far away from the fourth support plate (4), of the outer side wall of the limiting sleeve (55) in an extending mode, a limiting hole (561) matched with the limiting sleeve (55) and a limiting sinking groove (562) matched with the limiting support part (551) are formed in the fifth support plate (5); when the fourth support plate (4) is in end face contact with the fifth support plate (5), the shortest distance between the inner bottom wall of the limit sunken groove (562) and the end face of the limit branch part (551) is the compression distance.

6. The compression mold capable of improving molding quality of the mobile phone rear cover according to claim 5, wherein: a plurality of guide posts (44) penetrating through the fifth support plate (5) and the sixth support plate (6) are uniformly distributed on the fourth support plate (4), a first sliding sleeve (53) matched with the guide posts (44) is embedded in the fifth support plate (5), and a second sliding sleeve (63) matched with the guide posts (44) is embedded in the sixth support plate (6).

7. A compression mould capable of improving the forming quality of a mobile phone rear cover according to any one of claims 2-6, characterized in that: a plurality of positioning devices are uniformly distributed between the fifth support plate (5) and the sixth support plate (6), and each positioning device comprises a convex positioning bottom plate (92) which is embedded on the fifth support plate (5) and a concave positioning top plate (91) which is embedded on the sixth support plate (6).

8. The compression mold capable of improving molding quality of the mobile phone rear cover according to claim 7, wherein: a plurality of clamping devices are arranged between the fifth support plate (5) and the sixth support plate (6), each clamping device comprises a fixing clamp plate (93) hinged to the outer side wall of the sixth support plate (6) and a fixing bolt (94) rotatably arranged on the outer side wall of the fifth support plate (5), and a fixing clamp groove (95) matched with the fixing bolt (94) is formed in the fixing clamp plate (93).

9. A compression mould capable of improving the forming quality of a mobile phone rear cover according to any one of claims 2-6, characterized in that: the fixed die assembly comprises two groups of cover dies (81) and a bottom die (82), a middle die cover plate (85) connected with the sixth supporting plate (6) is arranged between the cover dies (81), and a middle die bottom plate (84) connected with the fifth supporting plate (5) is arranged between the bottom die (82).

10. The compression mold capable of improving molding quality of the mobile phone rear cover according to claim 9, wherein: a side formwork assembly surrounding the two bottom formworks (82) is embedded in the fifth support plate (5), a yielding groove (821) is formed in the side wall of each bottom formwork (82), and a rolling rod (822) in contact with the side formwork assembly is arranged in the yielding groove (821); chip grooves have been seted up to die block (82) lateral wall, chip groove one end with abdication groove (821) intercommunication, the other end extends to die block (82) with the terminal surface of eighth extension board (51) contact.