CN109228174A - The injection mold of display rear cover and the Shooting Technique of display rear cover - Google Patents
The injection mold of display rear cover and the Shooting Technique of display rear cover Download PDFInfo
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- CN109228174A CN109228174A CN201811099844.0A CN201811099844A CN109228174A CN 109228174 A CN109228174 A CN 109228174A CN 201811099844 A CN201811099844 A CN 201811099844A CN 109228174 A CN109228174 A CN 109228174A
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- injection
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- rear cover
- pressure
- mold
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- 238000002347 injection Methods 0.000 title claims abstract description 59
- 239000007924 injection Substances 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000001746 injection moulding Methods 0.000 claims description 34
- 239000002994 raw material Substances 0.000 claims description 28
- 238000010438 heat treatment Methods 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 12
- 239000004033 plastic Substances 0.000 claims description 12
- 239000003292 glue Substances 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000004677 Nylon Substances 0.000 claims description 3
- 238000003556 assay Methods 0.000 claims description 3
- 239000000498 cooling water Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000007791 dehumidification Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 235000013372 meat Nutrition 0.000 claims description 3
- 238000000048 melt cooling Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 230000000704 physical effect Effects 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims 1
- 239000012778 molding material Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 238000010586 diagram Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 238000000465 moulding Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 210000004877 mucosa Anatomy 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
-
- 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
- B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
-
- 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
- B29C45/2602—Mould construction elements
-
- 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
- B29C45/40—Removing or ejecting moulded articles
- B29C45/4005—Ejector constructions; Ejector operating mechanisms
Abstract
The invention discloses the Shooting Technique of a kind of injection mold of display rear cover and display rear cover, including panel, water gap plate, female module, male module and bottom plate, for water gap plate between panel and female module, bottom plate is equipped with two pieces of support blocks, and male module is fixed on support block；Panel is equipped with guide support equipped with sprue bush, the lower end of sprue bush and in sprue channel, and guide support includes the guide ring and several diversion rods at center, and several diversion rods are uniformly distributed between guide ring and sprue channel, and along the circumferential direction of guide ring.The present invention prevents product surface from phenomena such as heaving, blistering occur, and is demoulded convenient for product, improves production efficiency, guarantees the aesthetics and quality of product surface.
Description
Technical field
The invention belongs to technical field of mold, more particularly to a kind of injection mold of display rear cover.
Background technique
Injection molding is also known as injection molding molding, it is a kind of forming method of simultaneous molding of injection.Injection molding forming method
Advantage is that speed of production is fast, high-efficient, operates and automation can be achieved, and designs and varieties are more, and shape can go from the simple to the complex, and size can be with
It is descending, and product size is accurate, and the product of energy forming shape complexity, injection molding is suitable for the complex-shaped production of mass production
Product, high production efficiency.
Injection molding technology is that polymer barrel is added in graininess or powdered polymer raw material, is being added thermally or mechanically
It is plasticized under shear action, finally enters in mold under the promotion of plunger or screw rod, cooling and solidifying forms consistent with mold cavity
Polymer product.
A kind of injection mold disclosed in 207344999 U of Chinese patent publication No. CN is all accommodated in upper mold due to filling mouth
In plate and upper cores, so that the size for filling mouth is smaller, the length of runner is shorter, shortens stream material in injection molding in this way and is flowing
Road residence time is conducive to formed product and improves production efficiency, but since the mobility of stream material, temperature are in the presence of certain poor
Different, it is uneven to there is mixing when mixing, into the intracavitary molding of type it is cooling after will appear bonding wire, or even buckling deformation occur etc. it is scarce
It falls into, seriously affects the qualification rate of product, and product stripping low efficiency, mucosa events often occur.
Summary of the invention
The invention mainly solves the technical problem of providing a kind of injection mold of display rear cover and display rear covers
Shooting Technique prevents product surface from phenomena such as heaving, blistering occur, and is demoulded convenient for product, and production efficiency is improved, and guarantees to produce
The aesthetics and quality on product surface.
In order to solve the above technical problems, one technical scheme adopted by the invention is that: a kind of injection mould of display rear cover
Tool, including panel, water gap plate, female module, male module and bottom plate, the water gap plate be located at the panel and the female module it
Between, the bottom plate is equipped with two pieces of support blocks, and the male module is fixed on the support block；
The female module includes caster and mother module core, and the caster is equipped with the mother close to the surface of the male module
Mode, the male module include male template and male die core, and the male template is equipped with male die core, institute close to the surface of the female module
State shape forming cavity between mother module core and the male die core；
Ejector retainner plate and guide rod are equipped between the male template and the bottom plate, one end of the guide rod and bottom plate connect
It connects, the other end of the guide rod passes through the ejector retainner plate and connect with male template, and the guide rod is cased with reset spring, described multiple
For position spring between the ejector retainner plate and the male template, the ejector retainner plate is equipped with thimble, and the thimble passes through male module
It is contradicted with product；
The periphery of the mother module core is equipped with sliding shoe, and the sliding shoe has abutting portion, and it is intracavitary that the abutting portion is located at type
And the cavity for being used to form display rear cover is collectively formed with type chamber, the sliding shoe is equipped with driving sliding shoe and slides in or out type
The guide pad of chamber, the guide pad are fixed on panel；
The guide pad is equipped with guide part, and the sliding shoe has the pilot hole to match with the guide part, described to lead
It is inclined-plane to the side in portion, and its inclined direction gradually inclines to the center of mother module core along the direction that guide pad skids off pilot hole
Tiltedly, the gradient of the side wall of the pilot hole is consistent with the gradient on the inclined-plane of the guide part；
The panel is equipped with sprue bush, and the inside of the sprue bush is equipped with sprue channel, the sprue channel and the mother
The surface of template is connected into glue runner, described to be connected into glue runner with the glue-feeder of caster, the glue-feeder of the caster
It is connected to the gum-injecting port of the mother module core, the gum-injecting port of the mother module core is connected to the type chamber；
The lower end of the sprue bush and be located at sprue channel in be equipped with guide support, the guide support includes leading for center
Stream ring and several diversion rods, several diversion rods are led between the guide ring and sprue channel, and along described
The circumferential direction of stream ring is uniformly distributed；
The direction that the side of the diversion rod is flowed along fluid is tilted by the two sides of the Center wizard flow post of diversion rod, institute
The direction that the side of guide ring is flowed along fluid is stated to be tilted by the outside of the Center wizard stream ring of guide ring.
Further say, further include the first limit pull rod and the second limit pull rod, one end of first limit pull rod and
One end of second limit pull rod has limiting section all to limit caster, water gap plate and panel disengaging, first limit pull rod
The limiting section of one end be installed on the sliding eye of the panel, and the other end and the second limit pull rod of first limit pull rod
Connection, the caster, the male template and the support block, which are all equipped with, to match with the limiting section of second limit pull rod
Sliding eye.
It further says, the caster is equipped with sliding slot, and the left and right side of the sliding slot is equipped with two pieces of limited blocks, described
Limited block is fixed on caster, and the two sides of the sliding shoe have draw runner, and the draw runner is located at the bottom of limited block and the sliding slot
Between face.
It further says, the ejector retainner plate includes mounting plate and top plate, and the top plate is located at the bottom plate and the installation
Between plate, the surface that the mounting plate and the top plate fit is equipped with the mounting hole of installation thimble plush copper.
It further says, the panel is equipped with guide rod, the water gap plate, the caster, the male template and described
Support block is equipped with the through-hole to match with the guide rod.
It further says, further includes support column, the both ends of the support column are connect with the male template and bottom plate respectively.
The present invention is that further technical solution is used by solving its technical problem:
Utilize the Shooting Technique of the injection mold manufacture display rear cover of aforementioned display device rear cover, comprising the following steps:
The installation of S1, injection mold；
The inspection of S2, injection raw material: the physical property such as the rheological property of raw material, mechanical performance, hot property and electrical property are carried out
It examines, selected raw material is nylon；
The drying of S3, injection raw material: plastic particles are dried using dehumidification equipment, drying temperature 110-
120 DEG C, drying time 3-5h, the moisture content of plastic particles after drying is tested with detector for water content rate, if plastic particles contain
Water rate is greater than 0.02%, repeats S3 step；
The melting of S4, injection raw material: preheating injection-moulding device and mold, sets injection parameters, and injection raw material is defeated
It send to barrel, heating makes it at molten condition；
The injection molding of S5, injection raw material: it by the injection raw material of molten condition through screw extruding to nozzle, is arrived by nozzle injection
In mold, the temperature of nozzle is 220-230 DEG C；
Injection process is divided into 4 stages:
First segment injection pressure is 90-100MPa, and injection moulding speed 50-60mm/s, position of the screw rod apart from nozzle is
120-130mm；
Second segment injection pressure is 85-95MPa, and injection moulding speed 20-30mm/s, position of the screw rod apart from nozzle is 115-
125mm；
Third section injection pressure is 110-120MPa, and injection moulding speed 75-80mm/s, position of the screw rod apart from nozzle is
50-55mm；
4th section of injection pressure is 75-85MPa, and injection moulding speed 22-28mm/s, position of the screw rod apart from nozzle is 40-
48mm；
The total duration of the injection molding is 2-2.5s；
S6, pressure maintaining: in a mold when melt cooling meat, continue that pressurized state is kept to force melt near glue-feeder not
It is disconnected to be added in mold, so that the raw material of type chamber is molded the complete and fine and close plastic of shape；Pressure maintaining period is divided into 3 sections:
First segment dwell pressure is 45-50MPa, and pressure maintaining speed is 8-12mm/s, time 2.0s；
Second segment dwell pressure is 50-55MPa, and pressure maintaining speed is 10-15mm/s, time 2.5s；
Third section dwell pressure is 60-65MPa, and pressure maintaining speed is 12-18mm/s, time 2S；
S7, cooling and shaping: cooling down product by cooling water, cooling time 35s；
S8, product stripping: sliding shoe unclamps product under the action of guide pad, and product is ejected by the thimble of mold,
Molded part is put into carrier, places 2-3h at room temperature；
The ejection pressure of the thimble is 45-50MPa, and ejection speed is 30-40mm/s, and the distance of thimble ejection is
62mm；The back pressure of thimble is 50-55MPa, and rollback speed is 28-32mm/s；
S9, the examination and test of products: the appearance and performance of product are tested, packed after the assay was approved.
It further says, the heating temperature of the barrel is divided into 3 sections: the heating temperature of first segment is 215-225 DEG C, second
The heating temperature of section is 210-220 DEG C and the heating temperature of third section is 200-210 DEG C.
It further says, penetrating for screw rod moves back pressure as 48-52MPa after injection molding, and penetrating back speed degree is 22-28mm/s, spiral shell
Position of the bar apart from nozzle is 5mm.
It further says, the storing process of barrel is divided into 3 sections after injection molding:
First segment stock pressure is 115-125MPa, and storing speed is 80-90mm/s, and position of the screw rod apart from nozzle is
35-45mm；
Second segment stock pressure is 115-125MPa, and storing speed is 80-90mm/s, and position of the screw rod apart from nozzle is
75-85mm；
Third section stock pressure is 115-125MPa, and storing speed is 80-90mm/s, and position of the screw rod apart from nozzle is
125-135mm。
Beneficial effects of the present invention at least have the following:
Panel of the invention is equipped with sprue bush, and the inside of sprue bush is equipped with sprue channel, the table of sprue channel and caster
Being connected into glue runner for face, is connected into glue runner with the glue-feeder of caster, the glue-feeder of caster and the gum-injecting port of mother module core
Connection, the gum-injecting port of mother module core are connected to type chamber, the design into glue runner of master mold plate surface, when effectivelying prevent being molded too fast,
There is phenomena such as heaving, blistering in product surface, and guarantees the aesthetics and quality of product surface；
The periphery of mother module core of the invention is equipped with sliding shoe, and sliding shoe is equipped with driving sliding shoe and slides in or out leading for type chamber
To block, guide pad is fixed on panel, and in die sinking, sliding shoe is separated under the drive of guide pad with product, to reduce demoulding
Difficulty, improve production efficiency；
Guide support is equipped in sprue channel of the invention, guide support includes the guide ring and several water conservancy diversion at center
Bar, thus when entering stream material into glue runner from sprue channel, by guide support will stream material shunted after re-mix, make
Stream material mixing is more uniform, avoids forming bonding wire on product between not cocurrent flow material, guarantees the quality of injecting products；
The present invention is equipped with the first limit pull rod and the second limit pull rod, one end of the first limit pull rod and the second limit pull rod
One end all there is limiting section, the limiting section of first limit pull rod one end is installed on the sliding eye of panel, and the first limit pull rod
The other end connect with the second limit pull rod, thus die sinking when limitation panel, water gap plate and caster displacement, demoulding
When, panel, water gap plate and caster are separated, convenient for taking out material head；
The present invention optimizes the parameters such as injection molding, pressure maintaining, cooling, die sinking, the pressure of storing, speed, effectively reduces
Molding cycle and production cost.
Detailed description of the invention
Fig. 1 is decomposition diagram of the invention；
Fig. 2 is the cross-sectional view at sprue bush of the invention；
Fig. 3 is the enlarged drawing at the A of Fig. 2 of the invention；
Fig. 4 is the structural schematic diagram of mother module core of the invention, sliding shoe and guide pad；
Fig. 5 is the structural schematic diagram of sliding shoe of the invention；
Fig. 6 is the structural schematic diagram of guide pad of the invention；
Fig. 7 is the structural schematic diagram of caster of the invention；
Fig. 8 is the cross-sectional view at the first limit pull rod of the invention；
Fig. 9 is the structural schematic diagram of mounting plate of the invention；
Figure 10 is the structural schematic diagram of sprue bush of the invention；
Figure 11 is the structural schematic diagram of guide support of the invention；
Each section label is as follows in attached drawing:
Panel 1, sliding eye 11, water gap plate 2, bottom plate 3, support block 4, caster 5, sliding slot 51, limited block 52, into glue runner
53, glue-feeder 54, mother module core 6, sliding shoe 61, pilot hole 611, draw runner 612, abutting portion 613, gum-injecting port 62, male template 7, public affairs
Mode 8, ejector retainner plate 9, mounting plate 91, mounting hole 911, top plate 92, guide rod 100, reset spring 200, thimble 300, first limit
Position pull rod 400, limiting section 401, the second limit pull rod 500, support column 600, sprue bush 700, sprue channel 701, guide support
702, guide ring 7021, diversion rod 7022, guide rod 800, guide pad 900, guide part 901 and inclined-plane 9011.
Specific embodiment
The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawing, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.
Embodiment: a kind of injection mold of display rear cover, as shown in Figure 1-Figure 11, including panel 1, water gap plate 2, master mold
Block, male module and bottom plate 3, for the water gap plate 2 between the panel 1 and the female module, the bottom plate 3 is equipped with two pieces of moulds
Foot 4, the male module are fixed on the support block 4；
The female module includes caster 5 and mother module core 6, and the caster 5 is equipped with institute close to the surface of the male module
Mother module core 6 is stated, the male module includes male template 7 and male die core 8, and the male template 7 is equipped with close to the surface of the female module
Male die core 8, shape forming cavity between the mother module core 6 and the male die core 8；
Ejector retainner plate 9 and guide rod 100, one end of the guide rod 100 are equipped between the male template 7 and the bottom plate 3
It is connect with bottom plate 3, the other end of the guide rod 100 passes through the ejector retainner plate 9 and connect with male template 7,100 sets of the guide rod
There is reset spring 200, the reset spring 200 between the ejector retainner plate 9 and the male template 7, install by the ejector retainner plate 9
There is thimble 300, the thimble 300 passes through male module and product contradicts；
The periphery of the mother module core 6 is equipped with sliding shoe 61, and the sliding shoe 61 has abutting portion 613, the abutting portion 613
Intracavitary positioned at type and the cavity for being used to form display rear cover is collectively formed with type chamber, the sliding shoe 61 is equipped with driving sliding shoe
61 slide in or out the guide pad 900 of type chamber, and the guide pad 900 is fixed on panel 1；
The guide pad 900 is equipped with guide part 901, and the sliding shoe 61 has leads with what the guide part 901 matched
To hole 611, the side of the guide part 901 is inclined-plane 9011, and its inclined direction skids off pilot hole 611 along guide pad 900
Direction gradually tilted to the center of mother module core 6, the gradient of the side wall of the pilot hole 611 is oblique with the guide part 901
The gradient in face 9011 is consistent；
When it is implemented, the end of the guide part 901 is curved guiding surface so that the guide part 901 is inserted into pilot hole
611。
The panel 1 is equipped with sprue bush 700, and the inside of the sprue bush 700 is equipped with sprue channel 701, the cast gate stream
Road 701 is connected to the surface of the caster 5 into glue runner 53, described to connect into the glue-feeder 54 of glue runner 53 and caster 5
Logical, the glue-feeder 54 of the caster 5 is connected to the gum-injecting port 62 of the mother module core 6, the gum-injecting port 62 of the mother module core 6 and institute
State the connection of type chamber；
The lower end of the sprue bush 700 and be located at sprue channel 701 in be equipped with guide support 702, the guide support 702
Guide ring 7021 and several diversion rods 7022 including center, several diversion rods 7022 are located at the guide ring 7021
It is uniformly distributed between sprue channel 701, and along the circumferential direction of the guide ring 7021；
The direction that the side of the diversion rod 7022 is flowed along fluid by diversion rod 7022 Center wizard flow post 7022
Two sides inclination, the direction that the side of the guide ring 7021 is flowed along fluid by guide ring 7021 Center wizard stream ring
7021 outside inclination.
It further include the first limit pull rod 400 and the second limit pull rod 500, one end of first limit pull rod 400 and
One end of two limit pull rods 500 has limiting section 401 all to limit caster 5, water gap plate 2 and panel 1 and be detached from, and described first limits
The limiting section 401 of one end of position pull rod 400 is installed on the sliding eye 11 of the panel 1, and first limit pull rod 400 is another
One end is connect with the second limit pull rod 500, and the caster 5, the male template 7 and the support block 4 are all equipped with and described second
The sliding eye 11 that the limiting section 401 of limit pull rod 500 matches.
The caster 5 is equipped with sliding slot 51, and the left and right side of the sliding slot 51 is equipped with two pieces of limited blocks 52, the limit
Block 52 is fixed on caster 5, and the two sides of the sliding shoe 61 have a draw runner 612, and the draw runner 612 is located at limited block 52 and described
Between the bottom surface of sliding slot 51.
The ejector retainner plate 9 includes mounting plate 91 and top plate 92, and the top plate 92 is located at the bottom plate 3 and the mounting plate 91
Between, the mounting plate 91 is equipped with the mounting hole 911 of installation thimble plush copper with the surface that the top plate 92 fits.
The panel 1 is equipped with guide rod 800, the water gap plate 2, the caster 5, the male template 7 and the support block 4
Equipped with the through-hole to match with the guide rod 800.
It further include support column 600, the both ends of the support column 600 are connect with the male template 7 and bottom plate 3 respectively.
Utilize the Shooting Technique of the injection mold manufacture display rear cover of aforementioned display device rear cover, comprising the following steps:
The installation of S1, injection mold；
The inspection of S2, injection raw material: the physical property such as the rheological property of raw material, mechanical performance, hot property and electrical property are carried out
It examines, selected raw material is nylon；
The drying of S3, injection raw material: plastic particles are dried using dehumidification equipment, drying temperature 110-
120 DEG C, drying time 3-5h, the moisture content of plastic particles after drying is tested with detector for water content rate, if plastic particles contain
Water rate is greater than 0.02%, repeats S3 step；
The melting of S4, injection raw material: preheating injection-moulding device and mold, sets injection parameters, and injection raw material is defeated
It send to barrel, heating makes it at molten condition；
The injection molding of S5, injection raw material: it by the injection raw material of molten condition through screw extruding to nozzle, is arrived by nozzle injection
In mold, the temperature of nozzle is 220-230 DEG C；
Injection process is divided into 4 stages:
First segment injection pressure is 90-100MPa, and injection moulding speed 50-60mm/s, position of the screw rod apart from nozzle is
120-130mm；
Second segment injection pressure is 85-95MPa, and injection moulding speed 20-30mm/s, position of the screw rod apart from nozzle is 115-
125mm；
Third section injection pressure is 110-120MPa, and injection moulding speed 75-80mm/s, position of the screw rod apart from nozzle is
50-55mm；
4th section of injection pressure is 75-85MPa, and injection moulding speed 22-28mm/s, position of the screw rod apart from nozzle is 40-
48mm；
The total duration of the injection molding is 2-2.5s；
S6, pressure maintaining: in a mold when melt cooling meat, continue that pressurized state is kept to force melt near glue-feeder not
It is disconnected to be added in mold, so that the raw material of type chamber is molded the complete and fine and close plastic of shape；Pressure maintaining period is divided into 3 sections:
First segment dwell pressure is 45-50MPa, and pressure maintaining speed is 8-12mm/s, time 2.0s；
Second segment dwell pressure is 50-55MPa, and pressure maintaining speed is 10-15mm/s, time 2.5s；
Third section dwell pressure is 60-65MPa, and pressure maintaining speed is 12-18mm/s, time 2S；
S7, cooling and shaping: cooling down product by cooling water, cooling time 35s；
S8, product stripping: sliding shoe unclamps product under the action of guide pad, and product is ejected by the thimble of mold,
Molded part is put into carrier, places 2-3h at room temperature；
The ejection pressure of the thimble is 45-50MPa, and ejection speed is 30-40mm/s, and the distance of thimble ejection is
62mm；The back pressure of thimble is 50-55MPa, and rollback speed is 28-32mm/s；
S9, the examination and test of products: the appearance and performance of product are tested, packed after the assay was approved.
The heating temperature of the barrel is divided into 3 sections: the heating temperature of first segment is the heating temperature of 215-225 DEG C, second segment
Degree is 210-220 DEG C and the heating temperature of third section is 200-210 DEG C.
Penetrating for screw rod moves back pressure as 48-52MPa after injection molding, and penetrating back speed degree is 22-28mm/s, and screw rod is apart from nozzle
Position is 5mm.
The storing process of barrel is divided into 3 sections after injection molding:
First segment stock pressure is 115-125MPa, and storing speed is 80-90mm/s, and position of the screw rod apart from nozzle is
35-45mm；
Second segment stock pressure is 115-125MPa, and storing speed is 80-90mm/s, and position of the screw rod apart from nozzle is
75-85mm；
Third section stock pressure is 115-125MPa, and storing speed is 80-90mm/s, and position of the screw rod apart from nozzle is
125-135mm。
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure transformation made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant technical fields,
Similarly it is included within the scope of the present invention.
Claims (10)
1. a kind of injection mold of display rear cover, it is characterised in that: including panel (1), water gap plate (2), female module, male module
With bottom plate (3), for the water gap plate between the panel and the female module, the bottom plate is equipped with two pieces of support blocks (4), described
Male module is fixed on the support block；
The female module includes caster (5) and mother module core (6), and the caster is equipped with described close to the surface of the male module
Mother module core, the male module include male template (7) and male die core (8), and the male template is equipped with close to the surface of the female module
Male die core, shape forming cavity between the mother module core and the male die core；
Ejector retainner plate (9) and guide rod (100), one end of the guide rod and bottom plate are equipped between the male template and the bottom plate
Connection, the other end of the guide rod pass through the ejector retainner plate and connect with male template, and the guide rod is cased with reset spring
(200), for the reset spring between the ejector retainner plate and the male template, the ejector retainner plate is equipped with thimble (300), institute
Thimble is stated to contradict across male module and product；
The periphery of the mother module core is equipped with sliding shoe (61), and the sliding shoe has abutting portion (613), and the abutting portion is located at type
Intracavitary and the cavity for being used to form display rear cover is collectively formed with type chamber, the sliding shoe is equipped with driving sliding shoe and slides into or sliding
The guide pad (900) of type chamber, the guide pad are fixed on panel out；
The guide pad is equipped with guide part (901), and the sliding shoe has the pilot hole (611) to match with the guide part,
The side of the guide part is inclined-plane (9011), and its inclined direction skids off the direction of pilot hole gradually to master mold along guide pad
The center of benevolence tilts, and the gradient of the side wall of the pilot hole is consistent with the gradient on the inclined-plane of the guide part；
The panel is equipped with sprue bush (700), and the inside of the sprue bush is equipped with sprue channel (701), the sprue channel with
Being connected into glue runner (53) for the surface of the caster, it is described to be connected into glue runner with the glue-feeder (54) of caster, it is described
The glue-feeder of caster is connected to the gum-injecting port (62) of the mother module core, and the gum-injecting port of the mother module core is connected to the type chamber；
The lower end of the sprue bush and be located at sprue channel in be equipped with guide support (702), the guide support includes center
Guide ring (7021) and several diversion rods (7022), several diversion rods be located at the guide ring and sprue channel it
Between, and be uniformly distributed along the circumferential direction of the guide ring；
The direction that the side of the diversion rod is flowed along fluid is tilted by the two sides of the Center wizard flow post of diversion rod, described to lead
The direction that the side of stream ring is flowed along fluid is tilted by the outside of the Center wizard stream ring of guide ring.
2. the injection mold of display rear cover according to claim 1, it is characterised in that: further include the first limit pull rod
(400) and the second limit pull rod (500), one end of first limit pull rod and one end of the second limit pull rod all have limit
Portion (401) is detached from limiting caster, water gap plate and panel, and the limiting section of one end of first limit pull rod is installed on described
The sliding eye (11) of panel, and the other end of first limit pull rod is connect with the second limit pull rod, it is the caster, described
Male template and the support block are all equipped with the sliding eye to match with the limiting section of second limit pull rod.
3. the injection mold of display rear cover according to claim 1, it is characterised in that: the caster is equipped with sliding slot
(51), the left and right side of the sliding slot is equipped with two pieces of limited blocks (52), and the limited block is fixed on caster, the sliding shoe
Two sides have draw runner (612), the draw runner is between limited block and the bottom surface of the sliding slot.
4. the injection mold of display rear cover according to claim 1, it is characterised in that: the ejector retainner plate includes mounting plate
(91) and top plate (92), between the bottom plate and the mounting plate, the mounting plate is affixed the top plate with the top plate
The surface of conjunction is equipped with the mounting hole (911) of installation thimble plush copper.
5. the injection mold of display rear cover according to claim 1, it is characterised in that: the panel is equipped with guide rod
(800), the water gap plate, the caster, the male template and the support block are equipped with the through-hole to match with the guide rod.
6. the injection mold of display rear cover according to claim 1, it is characterised in that: further include support column (600), institute
The both ends for stating support column are connect with the male template and bottom plate respectively.
7. the Shooting Technique of display rear cover according to claim 1, it is characterised in that: the following steps are included:
The installation of S1, injection mold；
The inspection of S2, injection raw material: testing to physical property such as the rheological property of raw material, mechanical performance, hot property and electrical properties,
Selected raw material is nylon；
The drying of S3, injection raw material: being dried plastic particles using dehumidification equipment, and drying temperature is 110-120 DEG C,
Drying time is 3-5h, the moisture content of plastic particles after drying is tested with detector for water content rate, if the moisture content of plastic particles is big
In 0.02%, S3 step is repeated；
The melting of S4, injection raw material: preheating injection-moulding device and mold, sets injection parameters, injection raw material is delivered to
In barrel, heating makes it at molten condition；
The injection molding of S5, injection raw material: by the injection raw material of molten condition through screw extruding to nozzle, by nozzle injection to mold
In, the temperature of nozzle is 220-230 DEG C；
Injection process is divided into 4 stages:
First segment injection pressure is 90-100MPa, and injection moulding speed 50-60mm/s, position of the screw rod apart from nozzle is 120-
130mm；
Second segment injection pressure is 85-95MPa, and injection moulding speed 20-30mm/s, position of the screw rod apart from nozzle is 115-
125mm；
Third section injection pressure is 110-120MPa, and injection moulding speed 75-80mm/s, position of the screw rod apart from nozzle is 50-
55mm；
4th section of injection pressure is 75-85MPa, and injection moulding speed 22-28mm/s, position of the screw rod apart from nozzle is 40-48mm；
The total duration of the injection molding is 2-2.5s；
S6, pressure maintaining: in a mold when melt cooling meat, continue to keep pressurized state that the melt near glue-feeder is forced constantly to be mended
It is filled in mold, the raw material of type chamber is enable to mold the complete and fine and close plastic of shape；Pressure maintaining period is divided into 3 sections:
First segment dwell pressure is 45-50MPa, and pressure maintaining speed is 8-12mm/s, time 2.0s；
Second segment dwell pressure is 50-55MPa, and pressure maintaining speed is 10-15mm/s, time 2.5s；
Third section dwell pressure is 60-65MPa, and pressure maintaining speed is 12-18mm/s, time 2S；
S7, cooling and shaping: cooling down product by cooling water, cooling time 35s；
S8, product stripping: sliding shoe unclamps product under the action of guide pad, and product is ejected by the thimble of mold, will be at
Type part is put into carrier, places 2-3h at room temperature；
The ejection pressure of the thimble is 45-50MPa, and ejection speed is 30-40mm/s, and the distance of thimble ejection is 62mm；Top
The back pressure of needle is 50-55MPa, and rollback speed is 28-32mm/s；
S9, the examination and test of products: the appearance and performance of product are tested, packed after the assay was approved.
8. the Shooting Technique of display rear cover according to claim 7, it is characterised in that: the heating temperature of the barrel point
Be 3 sections: the heating temperature of first segment is 215-225 DEG C, the heating temperature of second segment is 210-220 DEG C and the heating temperature of third section
Degree is 200-210 DEG C.
9. the Shooting Technique of display rear cover according to claim 7, it is characterised in that: penetrating for screw rod is moved back after injection molding
Pressure is 48-52MPa, and penetrating back speed degree is 22-28mm/s, and position of the screw rod apart from nozzle is 5mm.
10. the Shooting Technique of display rear cover according to claim 7, it is characterised in that: the storage of barrel after injection molding
Material process is divided into 3 sections:
First segment stock pressure is 115-125MPa, and storing speed is 80-90mm/s, and position of the screw rod apart from nozzle is 35-
45mm；
Second segment stock pressure is 115-125MPa, and storing speed is 80-90mm/s, and position of the screw rod apart from nozzle is 75-
85mm；
Third section stock pressure is 115-125MPa, and storing speed is 80-90mm/s, and position of the screw rod apart from nozzle is 125-
135mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811099844.0A CN109228174A (en) | 2018-09-20 | 2018-09-20 | The injection mold of display rear cover and the Shooting Technique of display rear cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811099844.0A CN109228174A (en) | 2018-09-20 | 2018-09-20 | The injection mold of display rear cover and the Shooting Technique of display rear cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109228174A true CN109228174A (en) | 2019-01-18 |
Family
ID=65059758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811099844.0A Pending CN109228174A (en) | 2018-09-20 | 2018-09-20 | The injection mold of display rear cover and the Shooting Technique of display rear cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109228174A (en) |
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| CN201769338U (en) * | 2010-09-01 | 2011-03-23 | 东莞信易电热机械有限公司 | Hot runner mould with color-changing nozzle |
| CN203888138U (en) * | 2014-06-09 | 2014-10-22 | 杭州中进包装制品有限公司 | Slide and stroke limiting structure of mold |
| CN105128288A (en) * | 2015-08-25 | 2015-12-09 | 芜湖市恒峰科技有限公司 | Television set front shell injection mold |
| CN205044060U (en) * | 2015-08-13 | 2016-02-24 | 昆山明炜精密模具有限公司 | Lid injection mold behind battery |
| CN205165808U (en) * | 2015-09-29 | 2016-04-20 | 苏州飞拓精密模具有限公司 | Die casting die of magnesium alloy fan |
| CN106113428A (en) * | 2016-06-24 | 2016-11-16 | 芜湖恒信汽车内饰制造有限公司 | A kind of Shooting Technique of PP LGF30 material fronts module |
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2018
- 2018-09-20 CN CN201811099844.0A patent/CN109228174A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5553542A (en) * | 1978-10-13 | 1980-04-19 | Hitachi Ltd | Mechanism for cooling mold |
| CN201769338U (en) * | 2010-09-01 | 2011-03-23 | 东莞信易电热机械有限公司 | Hot runner mould with color-changing nozzle |
| CN203888138U (en) * | 2014-06-09 | 2014-10-22 | 杭州中进包装制品有限公司 | Slide and stroke limiting structure of mold |
| CN205044060U (en) * | 2015-08-13 | 2016-02-24 | 昆山明炜精密模具有限公司 | Lid injection mold behind battery |
| CN105128288A (en) * | 2015-08-25 | 2015-12-09 | 芜湖市恒峰科技有限公司 | Television set front shell injection mold |
| CN205165808U (en) * | 2015-09-29 | 2016-04-20 | 苏州飞拓精密模具有限公司 | Die casting die of magnesium alloy fan |
| CN106113428A (en) * | 2016-06-24 | 2016-11-16 | 芜湖恒信汽车内饰制造有限公司 | A kind of Shooting Technique of PP LGF30 material fronts module |
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Application publication date: 20190118 |
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