CN109278240B - Mobile terminal rear cover molding method with 3D cambered surface and compression mold - Google Patents

Mobile terminal rear cover molding method with 3D cambered surface and compression mold Download PDF

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Publication number
CN109278240B
CN109278240B CN201811115449.7A CN201811115449A CN109278240B CN 109278240 B CN109278240 B CN 109278240B CN 201811115449 A CN201811115449 A CN 201811115449A CN 109278240 B CN109278240 B CN 109278240B
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die
movable
mold
rear cover
fixed
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CN109278240A (en
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彭永生
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Shenzhen Australis Electronic Technology Co Ltd
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Shenzhen Australis Electronic Technology Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • B29C45/0055—Shaping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
    • B29L2031/3431—Telephones, Earphones
    • B29L2031/3437—Cellular phones

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Telephone Set Structure (AREA)

Abstract

The invention discloses a method for forming a rear cover of a mobile terminal with a 3D cambered surface and a compression mold. According to the method for forming the rear cover of the mobile terminal with the 3D cambered surface, provided by the invention, the rear cover base material of the rear cover of the mobile terminal with the rectangular binding surface can be formed in a compression molding mode, the mold splitting difficulty in injection molding is simplified, and the mold precision requirement is reduced.

Description

Mobile terminal rear cover molding method with 3D cambered surface and compression mold
Technical Field
The invention relates to the field of mobile terminal rear cover forming methods, in particular to a mobile terminal rear cover forming method with a 3D arc surface and a compression mold.
Background
The mobile terminal such as a mobile phone and a back cover of a tablet are used as back accessories, so that on one hand, the internal accessories of the mobile terminal can be protected, and on the other hand, the appearance of the mobile terminal can be optimized to improve the sales volume.
As a common molding method of the rear cover of the mobile terminal, the injection molding is weak when applied to the rear cover of the mobile terminal having an arc-shaped attaching surface (in fig. 1, the arc-shaped attaching surface is indicated by a letter T), because the attaching surface of the rear cover of the mobile terminal is non-planar, the mold splitting is difficult, and the requirement on the mold manufacturing precision is high.
Therefore, there is still a need for improvement and development of the prior art.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method for molding a rear cover of a mobile terminal with a 3D arc surface and a compression mold, and aims to solve the problems that in the prior art, the rear cover of the mobile terminal with the arc-shaped binding surface is produced in an injection molding mode, so that mold splitting is difficult, and the requirement on mold manufacturing precision is high.
The technical scheme of the invention is as follows:
a method for forming a rear cover of a mobile terminal with a 3D cambered surface comprises the following steps:
controlling a movable die in the compression die to move towards a fixed die until the distance between the movable die and the fixed die reaches the sum of the height of a die cavity of the die and the height of a reserved space; one of the fixed mold core and the movable mold core of the compression mold is provided with an arc-shaped groove, the other one of the fixed mold core and the movable mold core of the compression mold is provided with an arc-shaped bulge, and one side of the edge of the arc-shaped groove, which faces the arc-shaped bulge, extends to form a plane notch;
the injection molding machine injects the sol into a mold cavity and a reserved space which are formed by encircling the arc-shaped groove and the arc-shaped bulge until the filling amount of the mold cavity and the reserved space reaches a first preset value;
controlling the movable die to move towards the fixed die until the movable die is attached to the fixed die, and keeping the attachment state of the movable die and the fixed die for a preset time;
opening the mould and taking out the molded rear cover base material, wherein the end face of the opening end of the rear cover base material is a plane;
and removing the material of the end face of the opening end of the back cover base material by the CNC according to a set program until the end face of the opening end of the back cover base material is formed into an arc-shaped binding face.
In a further preferred scheme, the step of controlling the movable mold in the compression mold to move towards the fixed mold until the distance between the movable mold and the fixed mold reaches the sum of the height of the mold cavity and the height of the reserved space specifically includes:
die assembly: controlling a movable die of the compression die to move towards the fixed die until the movable die cannot move continuously;
moving back: and the movable die moves away from the fixed die until the distance between the movable die and the fixed die reaches the sum of the height of the die cavity and the height of the reserved space.
In a further preferred scheme, one side of the movable die core is connected with a spring plate, and the spring plate is compressed in the die assembly process;
the step that the movable die moves away from the fixed die until the distance between the movable die and the fixed die reaches the sum of the height of the die cavity and the height of the reserved space is specifically as follows:
the spring plate resets to drive the movable mold core to move away from the fixed mold core; and a compression spring is arranged in the spring plate, and when the compression spring is in a maximum length state, the distance between the movable die and the fixed die is just the sum of the height of the die cavity and the height of the reserved space.
In a further preferred scheme, a movable mold panel and a movable mold insert are arranged at the upper end of the spring plate, the upper end surface of the movable mold panel is higher than the upper end surface of the movable mold core, and the distance between the two end surfaces is equal to the height of the reserved space.
In a further preferred scheme, at least two guide posts extend upwards from the upper end face of the movable die panel, and the fixed die is matched with the guide posts and provided with guide holes.
In a further preferred embodiment, the height of the reserved space is between 0.1mm and 0.2 mm.
In a further preferred embodiment, the number of the fixed mold core and the movable mold core is two, so that the compression mold can simultaneously form two rear cover substrates.
In a further preferred scheme, a first trimming groove extends outwards from the plane notch, a second trimming groove is formed in the upper end face of the movable die core, the first trimming groove is matched with the second trimming groove in shape, a frame body forming groove is formed after the first trimming groove and the second trimming groove are surrounded, and the frame body forming groove is used for forming a process frame when a rear cover substrate is formed;
the CNC removes the material of back lid substrate open end terminal surface according to the procedure of setting for, still includes before the step of back lid substrate open end terminal surface shaping for the arc binding face:
the CNC removes the process frame according to a set program to avoid the directly molded rear cover substrate from generating a mantle, a burr or a flow mark.
In a further preferable scheme, the first preset value is 70% -90%.
A compression mold is used for realizing the method for molding the rear cover of the mobile terminal with the 3D arc surface.
The invention provides a method for forming a rear cover of a mobile terminal with a 3D cambered surface, which comprises the steps of forming a rear cover base material with a planar opening end surface after glue injection, compression forming and mold opening by utilizing a planar notch formed by extending a compression mold, and then removing the material of the opening end surface of the rear cover base material by utilizing CNC according to a set program to form the rear cover of the mobile terminal with a cambered surface binding surface. The rear cover base material can be molded by a compression molding mode of the rear cover of the mobile terminal with the rectangular binding surface, so that the mold splitting difficulty in injection molding is simplified, and the mold precision requirement is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a rear cover of a mobile terminal having an arc-shaped abutting surface according to the present invention.
FIG. 2 is a schematic structural view of a preferred embodiment of the compression mold of the present invention.
Fig. 3 is a schematic diagram illustrating a positional relationship between a cavity and a cavity in step S110 of the method for molding a rear cover of a mobile terminal having a 3D arc surface according to the present invention.
Fig. 4 is an enlarged view of a portion a in fig. 3.
Fig. 5 is a schematic diagram illustrating a positional relationship between a cavity and a cavity in step S120 of a method for molding a rear cover of a mobile terminal having a 3D arc surface according to the present invention.
Fig. 6 is an enlarged view of a portion B in fig. 5.
Fig. 7 is a schematic diagram of sol filling in a mold cavity and a reserved space in step S200 of the method for forming the rear cover of the mobile terminal with the 3D arc surface according to the present invention.
Fig. 8 is an enlarged view of a portion C in fig. 7.
Fig. 9 is a schematic diagram of a compression mold in the compression molding of the mobile terminal rear cover molding method step with a 3D arc surface according to the present invention.
Fig. 10 is an enlarged view of a portion D in fig. 9.
Fig. 11 is a schematic diagram of a state of a compression mold when the mold opening is performed in the mobile terminal rear cover molding method with a 3D arc surface according to the present invention.
FIG. 12 is a schematic view of the shape of the molded backing substrate of the present invention from which material is to be removed.
Fig. 13 is a flowchart of a method for forming a rear cover of a mobile terminal having a 3D curved surface according to a preferred embodiment of the present invention.
Detailed Description
The embodiments and examples of the present invention will be described in detail below with reference to the accompanying drawings, and the described embodiments are only for the purpose of illustrating the present invention and are not intended to limit the embodiments of the present invention.
The method for forming the rear cover of the mobile terminal with the 3D arc surface is used for forming the rear cover of the mobile terminal with the arc-shaped binding surface (such as the rear cover of the mobile terminal made of high polymer resin materials), and is realized based on a compression mold, wherein the compression mold comprises the following steps: the movable mould and the cover half, the movable mould includes movable mould benevolence, the cover half includes cover half benevolence, arbitrary being provided with the arc recess of movable mould benevolence and cover half benevolence, another of the two is provided with the arc arch, the edge of arc recess has the plane notch towards the protruding one side extension of arc, and the terminal surface of the back lid substrate (the substrate that the shaping after the injection cooling is gone on the aftertreatment to the shaping yet CNC) open end after the shaping promptly is the plane, and to dividing the mould, simple feasible, and can use the compression technology shaping.
In specific implementation, the arc-shaped groove 131 is formed in the cavity block 130, and the arc-shaped protrusion 231 is formed in the cavity block 230, as shown in fig. 2.
In a preferred embodiment of the present invention, the moving mold body includes: the movable mold comprises a movable mold base plate 210, a movable mold panel 220, a movable mold insert 250 and a movable mold core 230. The number of the movable mold cores 230 is two, the movable mold panel 220 is provided with a runner 270, the runner 270 is located between the two movable mold cores 230, and the movable mold base plate 210 is arranged away from the fixed mold. The fixed mold body includes: the fixed mold comprises a fixed mold base plate 110, a fixed mold panel 120 and fixed mold cores 130, wherein the number of the fixed mold cores 130 is two, the fixed mold cores 130 are respectively matched with a movable mold core 230, the fixed mold panel 120 is provided with a sprue 170, the sprue 170 is positioned between the two fixed mold cores 130, and the sprue 170 is communicated with the flow channel 270. During glue injection, the glue enters the runner 270 from the sprue bushing 170, then is shunted towards two sides in the runner 270, and respectively enters between the fixed mold core 130 and the movable mold core 230 which are matched with each other.
In a further preferred embodiment of the present invention, a plurality of spring plates 240 (i.e. at least two spring plates 240) are disposed on one side of the movable mold core 230 below the movable mold insert 250 and the movable mold panel 220, and the spring plates 240 can drive the movable mold core 230 and the movable mold base plate 210 to move in a direction away from the fixed mold. Preferably, a plurality of guide posts 260 are arranged on the movable die, the fixed die is matched with the guide posts 260, guide holes are formed in the guide posts, and the movable die moves along the axes of the guide holes.
Preferably, the method for forming the rear cover of the mobile terminal includes the steps of:
s100, controlling a movable die in the compression die to move towards a fixed die until the distance between the movable die and the fixed die reaches the sum of the height of a die cavity of the die and the height of a reserved space. The die cavity is a semi-closed cavity formed by enclosing the arc-shaped protrusion and the arc-shaped groove under the state that the movable die is attached to the fixed die.
The control of the distance between the movable mould and the fixed mould has a plurality of modes: for example, the control center directly controls the brake die to move a certain distance towards the fixed die until the distance between the brake die and the fixed die reaches a preset value; for another example, the control center firstly controls the movable mold to move towards the fixed mold, and then controls the movable mold to retreat after the movable mold and the fixed mold are attached until the distance between the movable mold and the fixed mold reaches a preset value (the preset value is the height value of the reserved space), and the method is different from the method in that the movable mold and the fixed mold are in place at one time: the original points are different, the original position of the movable mold is used as the original point in one-time in-place mode, the joint position of the fixed mold and the movable mold is used as the original point when the fixed mold and the movable mold are jointed and then retreated, and the accuracy of the fixed mold and the movable mold is higher; for example, the control center controls the movable mold to move towards the fixed mold until the movable mold and the fixed mold are attached, and then the movable mold is moved backwards (the retreating distance is the height value of the reserved space) by means of the elasticity of the elastic piece arranged on the movable mold or the fixed mold, and the mode does not need an original point.
In practical implementation, the spring plate 240 is preferably connected to one side of the movable mold core 230, as shown in fig. 2, and is compressed during the mold closing process; after the movable mold is attached to the fixed mold, the compressed spring plate drives the movable mold core to retreat until the spring recovers, and the distance between the movable mold and the fixed mold reaches the sum of the height of the mold cavity and the height of the reserved space. And when the compression spring is in a maximum length state, the distance between the movable die and the fixed die is just the sum of the height of the die cavity and the height of the reserved space. Compared with the method that the distance between the two is directly controlled by the control center, the embodiment does not need to accurately detect the position of the movable mold, has lower requirement on control precision, lower cost and higher efficiency.
Based on this, the step S100 specifically includes:
as shown in fig. 3 and 4, S110, mold clamping: and controlling the movable die of the compression die to move towards the fixed die until the movable die cannot move continuously, namely, the movable die is completely attached to the fixed die. In the figures 3 and 4, the distance between the movable mould core and the fixed mould core is 0.3 mm.
As shown in fig. 5 and 6, S120, return: and the movable mold moves away from the fixed mold until the distance between the movable mold and the fixed mold reaches the sum of the height of the mold cavity and the height of the reserved space, and the return distance of the movable mold is preferably 0.1mm to 0.2 mm. The method specifically comprises the following steps: the spring plate resets to drive the movable mold core to move away from the fixed mold core; and when the compression spring is in a maximum length state, the distance between the movable die and the fixed die is just the sum of the height of the die cavity and the height of the reserved space. In the figures 5 and 6, the distance between the movable mold core and the fixed mold core is 0.4 mm.
As shown in fig. 7 and 8, S200, the injection molding machine injects the sol into the mold cavity and the reserved space surrounded by the arc-shaped groove and the arc-shaped protrusion until the filling amount of the mold cavity and the reserved space reaches a first preset value. In fig. 7 and 8, the reference RJ is sol, and it can be seen that the filling amount of sol in the mold cavity and the reserved space does not reach 100%. In fig. 7 and 8, the distance between the moving mold core and the fixed mold core is 0.4 mm.
Therefore, the reserved space is arranged, the width of the space formed by the arc-shaped groove and the arc-shaped protrusion in a surrounding mode is enlarged, the flowing performance of the sol is improved, when the filling amount of the die cavity and the reserved space reaches a first preset value (preferably 70% to 90%, and is necessarily less than 100%), compression can be carried out, and therefore the rear cover substrate is compressed and formed.
As shown in fig. 9 and 10, S300, compression molding: and controlling the movable die to move towards the fixed die until the movable die is attached to the fixed die, and keeping the attachment state of the movable die and the fixed die for a preset time. In fig. 9 and 10, the distance between the moving mold core and the fixed mold core is 0.3 mm.
As shown in fig. 11, S400, opening the mold: and opening the mold to take out the molded rear cover base material, wherein the end face of the opening end of the rear cover base material is a plane. In fig. 11, reference number JC denotes a back cover substrate, and in fig. 11 there are two symmetrical back cover substrates, which are connected together by a material (e.g. polymer resin) cured in the squirt nozzle and the flow channel.
S500, removing the material on the end face of the opening end of the base material of the rear cover by the CNC according to a set program, wherein the material to be removed is represented by a cross section line in FIG. 12 as shown in FIG. 12; until the end surface of the opening end of the back cover substrate is formed into an arc-shaped binding surface.
According to the invention, the rear cover of the mobile terminal with the arc-shaped binding surface can use a planar structure by extending the edge of the arc-shaped groove outwards out of the plane notch, so that the compression mold is convenient to split, and the problem that the arc-shaped opening end can not be formed by the compression mold is solved.
In a further preferred embodiment of the present invention, the planar notch extends outward to form a first trimming groove, the movable die core is provided with a second trimming groove, the first trimming groove and the second trimming groove are matched in shape, as exemplified in fig. 4, the two trimming grooves are matched in shape, that is, if the first trimming groove is rectangular, the second trimming groove is also rectangular and the two trimming grooves have the same length, and meanwhile, if a first fillet is formed between the first trimming groove and the arc-shaped groove, a second fillet is formed between the second trimming groove and the arc-shaped protrusion, and the first fillet and the second fillet have the same angle. The first trimming groove and the second trimming groove are encircled to form a frame body forming groove, the frame body forming groove is used for forming a process frame during the forming of the rear cover base material, the thickness of the first trimming groove is preferably 0.1mm, the thickness of the second trimming groove is preferably 0.3mm, and the thickness of the frame body forming groove is 0.4 mm; the thickness of the rear cover of the mobile terminal is preferably 0.8mm, the thickness of the first trimming groove is far smaller than that of the rear cover of the mobile terminal, so that materials are saved on one hand, and the rear cover of the mobile terminal is convenient to cut off on the other hand.
The first trimming groove and the second trimming groove can be merged into the same groove to be opened on the movable mold core or the fixed mold core, for example, the arc-shaped groove is moved upwards by a certain thickness (the thickness is the thickness of the second trimming groove), and the thickness of the first trimming groove is increased (the increased thickness is also the thickness of the second trimming groove). However, it should be noted that the first trimming groove and the second trimming groove have a positioning function in addition to the function of the forming process frame after being surrounded, that is, the first trimming groove (still taking the arc-shaped groove as an example for illustration) is used as a reference, the right end of the second trimming groove is aligned with the right end of the first trimming groove, so that the die assembly of the movable die core and the fixed die core is completed, and if the right ends of the movable die core and the fixed die core are not aligned, it is proved that a transverse error is formed between the movable die core and the fixed die core, and the position of the movable die core needs to be readjusted, so as to improve the product yield.
The CNC removes the material of back lid substrate open end terminal surface according to the procedure of setting for, still includes before the step of back lid substrate open end terminal surface shaping for the arc binding face: the CNC removes the process frame according to a set program to avoid the directly molded rear cover substrate from generating a mantle, a burr or a flow mark.
The invention also provides a compression mold, which is used for realizing the method for molding the rear cover of the mobile terminal with the 3D cambered surface, and the specific structure of the compression mold is as described in the method embodiment.
It should be understood that the above-mentioned embodiments are merely preferred examples of the present invention, and not restrictive, but rather, all the changes, substitutions, alterations and modifications that come within the spirit and scope of the invention as described above may be made by those skilled in the art, and all the changes, substitutions, alterations and modifications that fall within the scope of the appended claims should be construed as being included in the present invention.

Claims (8)

1. A method for forming a rear cover of a mobile terminal with a 3D cambered surface is characterized by comprising the following steps:
controlling a movable die in the compression die to move towards a fixed die until the distance between the movable die and the fixed die reaches the sum of the height of a die cavity of the die and the height of a reserved space; one of the fixed mold core and the movable mold core of the compression mold is provided with an arc-shaped groove, the other one of the fixed mold core and the movable mold core of the compression mold is provided with an arc-shaped bulge, and one side of the edge of the arc-shaped groove, which faces the arc-shaped bulge, extends to form a plane notch;
the injection molding machine injects the sol into a mold cavity and a reserved space which are formed by encircling the arc-shaped groove and the arc-shaped bulge until the filling amount of the mold cavity and the reserved space reaches a first preset value;
controlling the movable die to move towards the fixed die until the movable die is attached to the fixed die, and keeping the attachment state of the movable die and the fixed die for a preset time;
opening the mould and taking out the molded rear cover base material, wherein the end face of the opening end of the rear cover base material is a plane;
removing the material on the end face of the opening end of the back cover base material by the CNC according to a set program until the end face of the opening end of the back cover base material is formed into an arc-shaped binding face;
the fixed die core and the movable die core are provided with two die cores for the compression die to simultaneously form two back cover base materials; a runner is arranged on a movable mould bottom plate of the movable mould and is positioned between the two movable mould cores; a fixed die panel of the fixed die is provided with a sprue bushing, the sprue bushing is positioned between the two fixed die cores and is communicated with the runner; during glue injection, the sol enters the flow channel from the squirt nozzle, is shunted towards two sides in the flow channel and respectively enters between the fixed mold core and the movable mold core which are matched;
the first trimming groove and the second trimming groove are matched in shape and form a frame body forming groove after being surrounded, and the frame body forming groove is used for forming a process frame when a rear cover base material is formed;
the CNC removes the material of back lid substrate open end terminal surface according to the procedure of setting for, still includes before the step of back lid substrate open end terminal surface shaping for the arc binding face:
the CNC removes the process frame according to a set program to avoid the directly molded rear cover substrate from generating a mantle, a burr or a flow mark.
2. The method for forming the rear cover of the mobile terminal with the 3D arc surface of claim 1, wherein: the step of controlling the movable mold in the compression mold to move towards the fixed mold until the distance between the movable mold and the fixed mold reaches the sum of the height of the mold cavity and the height of the reserved space specifically comprises the following steps:
die assembly: controlling a movable die of the compression die to move towards the fixed die until the movable die cannot move continuously;
moving back: and the movable die moves away from the fixed die until the distance between the movable die and the fixed die reaches the sum of the height of the die cavity and the height of the reserved space.
3. The method for forming the rear cover of the mobile terminal with the 3D arc surface as claimed in claim 2, wherein: one side of the movable mold core is connected with a spring plate, and the spring plate is compressed in the mold closing process;
the step that the movable die moves away from the fixed die until the distance between the movable die and the fixed die reaches the sum of the height of the die cavity and the height of the reserved space is specifically as follows:
the spring plate resets to drive the movable mold core to move away from the fixed mold core; and a compression spring is arranged in the spring plate, and when the compression spring is in a maximum length state, the distance between the movable die and the fixed die is just the sum of the height of the die cavity and the height of the reserved space.
4. The method for forming the rear cover of the mobile terminal with the 3D arc surface as claimed in claim 3, wherein: the upper end of the spring plate is provided with a movable mould panel and a movable mould insert, the upper end face of the movable mould panel is higher than the upper end face of the movable mould insert, and the distance between the two end faces is equal to the height of the reserved space.
5. The method for forming the rear cover of the mobile terminal with the 3D arc surface of claim 4, wherein: the movable mould panel upper end upwards extends has two at least guide posts, the cover half adaptation the guide post has seted up the guiding hole.
6. The method for forming the rear cover of the mobile terminal with the 3D arc surface as claimed in claim 3, wherein: the height of the reserved space is between 0.1mm and 0.2 mm.
7. The method for forming the rear cover of the mobile terminal with the 3D arc surface of claim 1, wherein: the first preset value is 70% -90%.
8. A compression mold, characterized in that, the compression mold is used for realizing the method for molding the rear cover of the mobile terminal with 3D arc surface as claimed in any one of claims 1 to 7.
CN201811115449.7A 2018-09-25 2018-09-25 Mobile terminal rear cover molding method with 3D cambered surface and compression mold Active CN109278240B (en)

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CN109278240B true CN109278240B (en) 2020-10-13

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005007383A1 (en) * 2003-07-18 2005-01-27 Sumitomo Heavy Industries, Ltd. Molding method, mold for molding, molded product, and molding machine
CN202071294U (en) * 2011-05-14 2011-12-14 冠捷显示科技（厦门）有限公司 Novel injection compression moulding mould
CN102773976A (en) * 2012-07-10 2012-11-14 华南理工大学 Bidirectional compression die, and implementation method and application thereof
CN107498788A (en) * 2017-08-07 2017-12-22 深圳市南极光电子科技有限公司 Forming light guide plate method based on compression forming

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005007383A1 (en) * 2003-07-18 2005-01-27 Sumitomo Heavy Industries, Ltd. Molding method, mold for molding, molded product, and molding machine
CN202071294U (en) * 2011-05-14 2011-12-14 冠捷显示科技（厦门）有限公司 Novel injection compression moulding mould
CN102773976A (en) * 2012-07-10 2012-11-14 华南理工大学 Bidirectional compression die, and implementation method and application thereof
CN107498788A (en) * 2017-08-07 2017-12-22 深圳市南极光电子科技有限公司 Forming light guide plate method based on compression forming

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