CN107186963B - Precision mould of copying machine deep cavity injection molding and forming method thereof - Google Patents
Precision mould of copying machine deep cavity injection molding and forming method thereof Download PDFInfo
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- CN107186963B CN107186963B CN201710449130.7A CN201710449130A CN107186963B CN 107186963 B CN107186963 B CN 107186963B CN 201710449130 A CN201710449130 A CN 201710449130A CN 107186963 B CN107186963 B CN 107186963B
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims description 8
- 229920003023 plastic Polymers 0.000 claims abstract description 17
- 239000004033 plastic Substances 0.000 claims abstract description 17
- 230000002093 peripheral effect Effects 0.000 claims abstract description 11
- 238000001816 cooling Methods 0.000 claims description 44
- 238000000465 moulding Methods 0.000 claims description 38
- 239000000463 material Substances 0.000 claims description 23
- 238000002347 injection Methods 0.000 claims description 19
- 239000007924 injection Substances 0.000 claims description 19
- 238000010438 heat treatment Methods 0.000 claims description 15
- 238000002844 melting Methods 0.000 claims description 15
- 230000008018 melting Effects 0.000 claims description 15
- 239000012943 hotmelt Substances 0.000 claims description 13
- 239000002994 raw material Substances 0.000 claims description 8
- 239000000498 cooling water Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 6
- 239000000110 cooling liquid Substances 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000009415 formwork Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
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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
- B29C45/17—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
- B29C45/26—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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/4005—Ejector constructions; Ejector operating mechanisms
-
- 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
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
- B29C45/7312—Construction of heating or cooling fluid flow channels
-
- 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
- B29C45/76—Measuring, controlling or regulating
- B29C45/77—Measuring, controlling or regulating of velocity or pressure of moulding material
-
- 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
- B29C45/76—Measuring, controlling or regulating
- B29C45/78—Measuring, controlling or regulating of temperature
-
- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76498—Pressure
-
- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76531—Temperature
-
- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76551—Time
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
- B29K2067/003—PET, i.e. poylethylene terephthalate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2069/00—Use of PC, i.e. polycarbonates or derivatives thereof, as moulding material
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a precise mould of a deep cavity injection molding piece of a duplicator, wherein the bottom surface of a front template and the top surface of a rear template are respectively provided with a fixing groove corresponding to each other, a front mould core is embedded in the fixing groove on the bottom surface of the front template, a mould core insert is fixed on the bottom surface of the front mould core, a rear mould core is embedded in the fixing groove on the top surface of the rear template, the top surface of the rear mould core is provided with a forming block and a groove, the bottom side surface of the groove is penetrated with a mould core block, a mould cavity is formed after the front mould core is correspondingly matched with the rear mould core and the mould core insert is correspondingly matched with the groove, and the mould core insert is inserted into the mould cavity; a gate piece is embedded on the front fixing plate and is communicated with the die cavity through a hot runner in the hot runner plate, and a core-pulling device is arranged on the peripheral side of the die cavity; an ejection mechanism penetrates through the rear template, and the top end of the ejection mechanism penetrates through the rear mold core and is inserted into the mold cavity. The die is reasonable in structural design, simple in parting, stable in product forming and high in die precision, and the forming precision of the plastic part and the probability of forming a finished product are improved.
Description
Technical Field
The invention relates to the technical field of precision molds for molding injection-molded parts, in particular to a precision mold for a deep-cavity injection-molded part of a copying machine and a molding method thereof.
Background
At present, a housing of an exhaust system of a copying machine is a deep-cavity injection molding piece, and is characterized by large area, high height, thin wall thickness, more bone positions and the like, the phenomena of underfilling, glue shortage and the like often occur in the injection molding process, and the appearance requirement is higher. The mold frame is provided with an insert block, the insert block is provided with an insert block exhaust groove, the insert block exhaust groove is distributed along the edge of a product rib position, the direction of the insert block exhaust groove is consistent with that of the product rib position, a plurality of rib position exhaust grooves communicated with the insert block exhaust groove are arranged between the product rib positions, the mold frame is provided with an exhaust channel, and the exhaust channel is connected with the insert block exhaust groove and the rib position exhaust groove. The invention increases the speed of injection molding and filling, reduces the fraction defective of the finished product, and shortens the production cycle of the finished product, but does not solve the actual technical problems of low service life of the existing mold, low mold precision, low product molding precision, poor molding uniformity and stability, high energy consumption, complex production process and the like, so the invention provides a precision mold in view of the technical problems.
Disclosure of Invention
The invention aims to solve the technical defects and provides a precise mold for a deep-cavity injection molding part of a copying machine, which is improved in use effect and service life.
The invention relates to a precision die for a deep cavity injection molding piece of a copying machine, which comprises a front die and a rear die, wherein the front die sequentially comprises a front fixing plate, a hot runner plate and a front template from top to bottom, the rear die sequentially comprises a rear template and a rear fixing plate from top to bottom, the bottom surface of the front template and the top surface of the rear template are respectively provided with fixing grooves corresponding to each other, a front die core is embedded in the fixing groove at the bottom surface of the front template, a die core insert used for molding the deep cavity of the injection molding piece is fixed at the bottom surface of the front die core, a rear die core correspondingly matched with the front die core is embedded in the fixing groove at the top surface of the rear template, the top surface of the rear die core is provided with a molding block used for molding a plurality of holes and a plurality of grooves of injection molding pieces and a groove for correspondingly inserting the die core insert, a die core block used for molding the peripheral slotted holes of the injection molding piece is arranged on the bottom side surface of the groove, the front die core and the rear die core are correspondingly matched with the die core, and the die core insert is formed into the die cavity used for molding piece after the die is correspondingly matched with the groove; a sprue part is embedded in the front fixing plate, the sprue part is communicated with the die cavity through a hot runner in the hot runner plate, and a core-pulling device for forming holes and/or grooves on the peripheral side of the injection molding part is arranged on the peripheral side of the die cavity; an ejection mechanism for ejecting the molded injection molding piece from the rear mold core penetrates through the rear mold plate, and the top end of the ejection mechanism penetrates through the rear mold core and is inserted into the mold cavity.
Preferably, the core pulling device comprises a slider seat, a core pulling slider, a shovel base and an inclined guide post, the shovel base and the inclined guide post are respectively fixed on the bottom surface of the front template, the top surface of the rear template is provided with a sliding groove corresponding to the shovel base, and the slider seat is slidably embedded in the sliding groove; the core-pulling slide block penetrates through the space between the front mold core and the rear mold core and then is inserted into the mold cavity; the sliding block seat and the core-pulling sliding block are connected and fixed with each other; the slider seat is obliquely provided with a guide hole; the inner bottom surface of the sliding groove is provided with a positioning slot for the inclined guide post to penetrate through the guide hole and then to be inserted.
Further preferably, the hot runner in the hot runner plate has a specific structure as follows: the hot runner plate is embedded with a hot runner fixing plate, a runner on the sprue part is communicated with a runner in the hot runner fixing plate, a plurality of needle valve type hot runners penetrate through the hot runner fixing plate, the needle valve type hot runners are communicated with the runner and the die cavity in the hot runner fixing plate respectively, and a heating module is arranged on each needle valve type hot runner.
Preferably, the combined type formwork further comprises a concave block with a concave-shaped section and a convex block with a convex-shaped section, the concave block is fixed on the bottom surface of the front formwork, the convex block is fixed on the top surface of the rear formwork, and the convex part of the convex block is inserted into the concave part of the concave block for limiting.
Preferably, the ejection mechanism comprises an ejector plate, a plurality of straight ejector rods, a plurality of inclined ejector rods, an inclined ejector guide block, an inclined ejector base and an inclined ejector seat fixing block, wherein a cavity is formed in the rear fixing plate after the rear fixing plate is fixed with the rear template through mold pins, the ejector plate is arranged in the cavity, the inclined ejector seat fixing block is fixed on the ejector plate, the inclined ejector base is fixed on the inclined ejector seat fixing block, the bottom end of each inclined ejector rod is fixed on the inclined ejector base, the top end of each inclined ejector rod sequentially penetrates through the inclined ejector guide block, the rear template and the rear mold core and can be ejected, the top end of each straight ejector rod penetrates through the rear mold core and can be ejected, and the top end of each straight ejector rod is provided with an ejector block.
Further preferably, the front template, the front mold core, the rear template, the rear mold core and the mold core insert are respectively provided with a cooling channel, the cooling channel of the front template is communicated with the cooling channel of the front mold core, the cooling channel of the rear template is communicated with the cooling channel of the rear mold core, and the cooling channel of the front mold core is communicated with the cooling channel of the mold core insert; spiral water-proof sheets are inserted into each cooling channel.
Preferably, the front mold core is embedded in the fixing groove of the front mold plate through the trapezoid-shaped front mold wedging block, and the rear mold core is embedded in the fixing groove of the rear mold plate through the trapezoid-shaped rear mold wedging block.
Further preferably, the method for molding the copy deep-cavity injection molding part comprises the following specific molding steps of adopting a precision mold of the copy deep-cavity injection molding part:
a. preparing materials: taking the model PC + PET KCA9371NH as a plastic raw material of a molding injection molding piece;
b. melting: putting a PC + PET KCA9371NH plastic raw material into a hot melting device, heating to 245-260 ℃ for melting, and then forming a hot melting material, wherein the hot melting material enters an injection channel;
c. plasticizing: keeping the hot melt in the injection channel in a molten state, wherein the temperature for keeping the molten state is as follows: 245-260 ℃;
d. die assembly: the front template is driven to be attached to the rear template, the core-pulling slide block slides under the guide of the inclined guide post and the shovel base to penetrate through the space between the front mold core and the rear mold core and then is inserted into the mold cavity, the front mold core is correspondingly matched with the rear mold core, and the mold core insert is inserted into the groove, so that a mold cavity for core-pulling molding of the injection molding piece is formed;
e. injecting materials: the plastic raw material of molten state is pressed and injected into the runner of the hot runner fixing plate through the sprue piece, and the hot melt material in the runner of the hot runner fixing plate enters the needle valve type hot runner, the hot melt material in the needle valve type hot runner is heated through the heating module to keep the molten state, and then the hot melt material enters the molding injection molding in the mold cavity, and the pressure of injection is applied: 90Mpa, the injection amount is: 50 mm, the molding time is: and 60 seconds, wherein the heating temperature of the heating module is as follows: 245-260 ℃;
f. and (3) cooling: injecting cooling liquid into the cooling channels to cool the temperature of the injection molding piece, enabling the cooling water to be smooth through the spiral water-proof sheets when the cooling channels are slightly staggered, cooling the temperature to 20-30 ℃, and cooling for the following time: 25 seconds;
g. opening the mold: the front template is driven to open the mold, the core-pulling slide block slides towards the outer side of the mold under the guide of the inclined guide post, and the inclined ejector rod and the straight ejector rod of the ejection mechanism eject out an injection molding product under the upward ejection effect of the ejector plate, so that the injection molding product and the mold are demolded.
The precision mould of the copying machine deep cavity injection molding part, which is designed by the invention, has the advantages that the mould structure realizes the perfect molding of the ultra-thin electric vehicle storage battery plastic shell with multiple rib positions, the structural design is reasonable, the parting is simple, the precision of the mould can be easily controlled, the precision of the mould can reach 0.01mm, the service life of the mould is 2-3 times that of a general mould, the product molding is stable, the precision of the mould is high, the speed ratio of the molding period is improved by 4-5 times, the precision of the product can reach 0.02mm, the production efficiency of the general mould is about 2 times that of the general mould, in addition, the molding performance of the plastic part is greatly improved, the risk of generating plastic part bubbles is also avoided, the probability of molding a finished product is higher, and the abrasion to the mould is small.
Drawings
FIG. 1 is the whole structure diagram of embodiment 1;
FIG. 2 is the whole structure diagram of embodiment 1 (II);
FIG. 3 is the whole structure diagram (III) of embodiment 1;
FIG. 4 is the whole structure diagram of example 1 (IV);
FIG. 5 is a schematic view of the structure of the parts of embodiment 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
Example 1:
as shown in fig. 1-5, the precision mold for the deep cavity injection molding of the copier described in this embodiment includes a front mold and a rear mold, the front mold sequentially includes a front fixing plate 1, a hot runner plate 2 and a front mold plate 3 from top to bottom, the rear mold sequentially includes a rear mold plate 4 and a rear fixing plate 5 from top to bottom, the bottom surface of the front mold plate 3 and the top surface of the rear mold plate 4 are respectively provided with fixing grooves 14 corresponding to each other, a front mold core 6 is embedded in the fixing groove 14 at the bottom surface of the front mold plate 3, a mold core insert 61 for molding the deep cavity of the injection molding is fixed at the bottom surface of the front mold core 6, a rear mold core 7 corresponding to the position of the front mold core 6 is embedded in the fixing groove 14 at the top surface of the rear mold plate 4, the top surface of the rear mold core 7 is provided with a molding block 72 for molding a plurality of holes and a plurality of grooves of the injection molding, and a groove 71 for inserting the mold core insert 61 into the mold core insert 61 for molding the peripheral slot of the injection molding, and the molding block 61 is inserted into the cavity of the injection molding; a sprue part 11 is embedded on the front fixing plate 1, the sprue part 11 is communicated with a mold cavity through a hot runner in the hot runner plate 2, and a core-pulling device 8 for forming holes and/or grooves on the peripheral side of the injection molding part is arranged on the peripheral side of the mold cavity; an ejection mechanism 9 for ejecting the molded injection molding piece from the rear mold core 7 penetrates through the rear mold plate 4, and the top end of the ejection mechanism 9 penetrates through the rear mold core 7 and is inserted into the mold cavity. The structure of the mould opening device enables the mould opening to be convenient and reliable, the injection molding filling is good, the size is accurate, and the yield is high. This patent is applicable to various ultra-thin type plastic shell goods injection mold's mold core structure.
In this embodiment, the core pulling device 9 includes a slider seat 83, a core pulling slider 85, a shovel base 81 and an inclined guide post 84, the shovel base 81 and the inclined guide post 84 are respectively fixed on the bottom surface of the front mold plate 3, the top surface of the rear mold plate 4 is provided with a sliding groove 82 corresponding to the shovel base 81, and the slider seat 83 is slidably embedded in the sliding groove 82; the core-pulling slide block 85 penetrates between the front mold core 6 and the rear mold core 7 and then is inserted into the mold cavity; the sliding block seat 83 and the core-pulling sliding block 85 are fixedly connected with each other; a guide hole 831 is obliquely arranged on the sliding block seat 83; the inner bottom surface of the sliding groove 82 is provided with a positioning slot 86 for the inclined guide post 84 to pass through the guide hole 831 and then be inserted. The structure perfectly shapes the straight hole and the straight groove which need to be shaped on the peripheral side of the plastic shell of the ultra-thin type electric vehicle storage battery with more rib positions, and the shaping precision of the product reaches 0.02mm. The shovel base makes the slider of loosing core location accurate reliable after having the compound die, promotes result of use and practicality. The inclined guide post is in interference fit with the front template.
In this embodiment, the hot runner in the hot runner plate 2 has the following specific structure: the hot runner plate 2 is embedded with a hot runner fixing plate 10, a runner on the sprue piece 11 is communicated with a runner in the hot runner fixing plate 10, a plurality of needle valve type hot runners 12 penetrate through the hot runner fixing plate 10, each needle valve type hot runner 12 is communicated with a runner and a mold cavity in the hot runner fixing plate 10, and each needle valve type hot runner 12 is provided with a heating module. The structure of the hot runner mould adopts a plurality of needle valve type hot runners 12, so that the function of no residual sprue on the formed exhaust system shell of the copying machine is achieved, and the material injection in the mould cavity is more uniform, so that the formed exhaust system shell product of the copying machine has better uniformity and stability.
In this embodiment, the front mold plate further includes a concave block 16 having a concave section and a convex block 15 having a convex section, the concave block 16 is fixed to the bottom surface of the front mold plate 3, the convex block 15 is fixed to the top surface of the rear mold plate 4, and the convex portion of the convex block 15 is inserted into the concave portion of the concave block 16 for limiting. The structure of the mould enables the front mould plate and the rear mould plate to be attached to a preset position after mould closing, and has a positioning function, so that the front mould core 6, the rear mould core 7, the mould core insert 61, the groove 71, the mould core block 73, the forming block 72 and the core-pulling slide block 85 are tightly matched at the preset position to form a mould cavity for forming an ultra-thin, rib-position-rich and deep-cavity exhaust system shell of the copying machine, the precision of the ultra-thin, rib-position-rich and deep-cavity exhaust system shell of the copying machine is within the range of 0.02mm, and the quality of the product is improved.
In this embodiment, the ejection mechanism 9 includes an ejector plate 95, a plurality of straight ejector rods 97, a plurality of oblique ejector rods 92, an oblique ejector guide block 91, an oblique ejector base 94 and an oblique ejector seat fixing block 93, the rear fixing plate 5 forms a cavity inside after being fixed with the rear mold plate 4 through mold pins 96, the ejector plate 95 is disposed in the cavity, the oblique ejector seat fixing block 93 is fixed on the ejector plate 95, the oblique ejector base 94 is fixed on the oblique ejector base fixing block 93, the bottom end of the oblique ejector rod 92 is fixed on the oblique ejector base 94, the top end of the oblique ejector rod 92 sequentially penetrates through the oblique ejector guide block 91, the rear mold plate 4 and the rear mold core 7 and then can be ejected, the top end of the straight ejector rod 97 penetrates through the rear mold core 7 and then can be ejected, and the top end of the straight ejector rod 97 is provided with an ejector block 921. After the product is molded and the mold is opened, the ejector plate drives the inclined ejector rod and the straight ejector rod to eject towards the direction of the rear mold core under the condition of being pushed, so that the molded ultrathin copier exhaust system shell product with more ribs is perfectly pushed out.
In this embodiment, the front mold plate 3, the front mold core 6, the rear mold plate 4, the rear mold core 7 and the mold core insert 61 are respectively provided with a cooling channel, the cooling channel of the front mold plate 3 is communicated with the cooling channel of the front mold core 6, the cooling channel of the rear mold plate 4 is communicated with the cooling channel of the rear mold core 7, and the cooling channel of the front mold core 6 is communicated with the cooling channel of the mold core insert 61; spiral water-proof sheets are inserted into each cooling channel. Because the spiral water-proof sheet adopts a split type, the assembly operation is simple, and the cooling water can be smooth when the upper cooling hole and the lower cooling hole are slightly staggered. The spiral water-proof sheet can increase the contact between cooling water and the mold core by enabling the cooling water to flow in a rotating manner, so that the cooling efficiency is 4-5 times higher than that of a conventional water-proof sheet; because the spiral water-proof sheet is made of plastic, the cooling hole can not be blocked due to rusting.
The working principle of the die structure is as follows: the mould is fixed on the injection molding machine, and the injection molding machine divide into fixed part and movable part, and the front mould is fixed at injection molding machine fixed part when the mould is in the compound die state, and the movable part at the injection molding machine is fixed to the back mould, and the process after the product injection moulding is: front template 3 and back template 4 are opened, thereby force slider seat 81 to outwards slide under the effect of oblique guide pillar 84 and deviate from the product outside back-off, and the push rod of injection molding machine promotes thimble board 95 upwards and follow the removal with the oblique ejector pin of movable core formula through the hole on the bottom plate, and ejection mechanism 9 can be ejecting the product, and the injection molding machine is the thrust with the help of the screw rod. During die assembly, the ejector plate 95 returns, the die is assembled again, and in the die assembly process, the push rod contacts with the swing rod first, so that the ejector plate 95 is forced to return completely. In the production process of each product, the waterway is connected to ensure that qualified products are produced.
In this embodiment, the front core 6 is fitted in the fixing groove 14 of the front mold plate 3 via the front mold caulking piece 13 having a trapezoidal shape, and the rear core 7 is fitted in the fixing groove 14 of the rear mold plate 4 via the rear mold caulking piece 13 having a trapezoidal shape. The structure of the mould makes the front mould core and the rear mould core fixed more firmly and reliably.
In the method for molding the copy deep cavity injection molding piece in the embodiment, the specific molding steps of the precision mold of the copy deep cavity injection molding piece are as follows:
a. preparing materials: taking the model PC + PET KCA9371NH as a plastic raw material of a molding injection molding piece;
b. melting: placing a PC + PET KCA9371NH plastic raw material into a hot melting device, heating to 245-260 ℃ for melting, and then forming a hot melting material, wherein the hot melting material enters an injection channel;
c. plasticizing: keeping the hot melt in the injection channel in a molten state, wherein the temperature for keeping the molten state is as follows: 245-260 ℃;
d. die assembly: the front template 3 and the rear template 4 are driven to be attached, the core-pulling sliding block 85 slides under the guide of the inclined guide post 84 and the shovel base 81 to penetrate through the space between the front mold core 6 and the rear mold core 7 and then be inserted into the mold cavity, the front mold core 6 and the rear mold core 7 are correspondingly matched, and the mold core insert 61 is inserted into the groove 71, so that a mold cavity for core-pulling molding an injection molding piece is formed; the mode makes the injection molding fill good, and the size is accurate, and the yield is high. This patent is applicable to various ultra-thin type plastic shell goods injection mold's mold core structure.
e. Injecting materials: the plastic raw material in the molten state is pressurized and injected into a runner of the hot runner fixing plate 10 through the gate piece 11, the hot melt material in the runner of the hot runner fixing plate 10 enters the needle valve type hot runner 12, the hot melt material in the needle valve type hot runner 12 is heated through the heating module to be kept in the molten state, then the hot melt material enters the mold cavity to form an injection molding piece, and the pressure for applying injection is as follows: 90Mpa, the injection amount is: 50 mm, the molding time is: and 60 seconds, wherein the heating temperature of the heating module is as follows: 245-260 ℃; the mode makes the hot melt of injection comparatively even, prevents the production of bubble, and the injection volume is controlled by better, and the shaping effect of product is better.
f. And (3) cooling: injecting cooling liquid into the cooling channels to cool the temperature of the injection molding piece, enabling the cooling water to be smooth through the spiral water-proof sheets when the cooling channels are slightly staggered, cooling the temperature to 20-30 ℃, and cooling for the following time: 25 seconds; so that the product after cooling and forming has better solidification performance and is easy to demould.
g. Opening the die: the front template 3 is driven to open the mold, the core-pulling slide block 85 slides towards the outer side of the mold under the guide of the inclined guide post 84, and the inclined ejector rod 91 and the straight ejector rod 97 of the ejection mechanism 9 eject the injection molding product under the upward ejection effect of the ejector plate 95, so that the injection molding product and the mold are demolded. The mode promotes the product and carries out automatic drawing of patterns, promotes the efficiency of drawing of patterns to automatic intelligent degree is higher.
The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by anyone in the light of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as those of the present application, fall within the protection scope of the present invention.
Claims (6)
1. A precision mould of an injection molding piece of a deep cavity of a copying machine comprises a front mould and a rear mould, and is characterized in that the front mould sequentially comprises a front fixing plate, a hot runner plate and a front template from top to bottom, the rear mould sequentially comprises a rear template and a rear fixing plate from top to bottom, the bottom surface of the front template and the top surface of the rear template are respectively provided with fixing grooves which correspond to each other, a front mould core is embedded in the fixing groove on the bottom surface of the front template, a mould core insert used for molding the deep cavity of the injection molding piece is fixed on the bottom surface of the front mould core, a rear mould core matched with the front mould core in position is embedded in the fixing groove on the top surface of the rear template, a molding block used for molding a plurality of holes and a plurality of grooves of injection molding pieces and a groove used for the corresponding insertion of the mould core insert are arranged on the top surface of the rear mould core, a mould core block used for molding the peripheral slotted holes of the injection molding piece penetrates through the bottom side surface of the groove, the front mould core and the rear mould core are correspondingly matched, a mould cavity used for molding piece is formed after the injection molding piece is correspondingly matched with the insert and the front mould core and the rear mould core and the groove; a sprue part is embedded in the front fixing plate, the sprue part is communicated with the die cavity through a hot runner in the hot runner plate, and a core-pulling device for forming holes and/or grooves on the peripheral side of the injection molding part is arranged on the peripheral side of the die cavity; an ejection mechanism for ejecting the molded injection molding piece from the rear mold core penetrates through the rear mold plate, and the top end of the ejection mechanism penetrates through the rear mold core and is inserted into the mold cavity;
the core pulling device comprises a sliding block seat, a core pulling sliding block, a shovel base and an inclined guide post, wherein the shovel base and the inclined guide post are respectively fixed on the bottom surface of the front template, the top surface of the rear template is provided with a sliding groove corresponding to the shovel base, and the sliding block seat is slidably embedded in the sliding groove; the core-pulling slide block penetrates through the space between the front mold core and the rear mold core and then is inserted into the mold cavity; the sliding block seat and the core-pulling sliding block are connected and fixed with each other; the slider seat is obliquely provided with a guide hole; the inner bottom surface of the sliding groove is provided with a positioning slot for the inclined guide post to penetrate through the guide hole and then to be inserted;
the hot runner structure in the hot runner plate is as follows: the hot runner plate is embedded with a hot runner fixing plate, a runner on the sprue part is communicated with a runner in the hot runner fixing plate, a plurality of needle valve type hot runners penetrate through the hot runner fixing plate, the needle valve type hot runners are communicated with the runner and the die cavity in the hot runner fixing plate respectively, and a heating module is arranged on each needle valve type hot runner.
2. The precision mold for the injection-molded deep cavity of a copying machine according to claim 1, further comprising a concave block having a concave shape in cross section and a convex block having a convex shape in cross section, wherein the concave block is fixed to the bottom surface of the front mold plate, the convex block is fixed to the top surface of the rear mold plate, and the convex portion of the convex block is inserted into the concave portion of the concave block for limiting.
3. The precision mold for the deep cavity injection-molded part of a copying machine as claimed in claim 2, wherein the ejection mechanism comprises an ejector plate, a plurality of straight ejector rods, a plurality of inclined ejector rods, an inclined ejector guide block, an inclined ejector base and an inclined ejector base fixing block, the rear fixing plate is fixed with the rear mold plate through mold legs to form a cavity inside, the ejector plate is arranged in the cavity, the inclined ejector base fixing block is fixed on the ejector plate, the inclined ejector base is fixed on the inclined ejector base fixing block, the bottom end of the inclined ejector rod is fixed on the inclined ejector base, the top end of the inclined ejector rod sequentially penetrates through the inclined ejector guide block, the rear mold plate and the rear mold core to be ejected, the top end of the straight ejector rod penetrates through the rear mold core to be ejected, and the top end of the straight ejector rod is provided with an ejector block.
4. The precision mold for deep cavity injection molding of copying machine according to claim 3, wherein the front mold plate, the front mold core, the rear mold plate, the rear mold core and the mold core insert are respectively provided with a cooling channel, and the cooling channel of the front mold plate is communicated with the cooling channel of the front mold core, the cooling channel of the rear mold plate is communicated with the cooling channel of the rear mold core, and the cooling channel of the front mold core is communicated with the cooling channel of the mold core insert; spiral water-proof sheets are inserted into each cooling channel.
5. The precision mold for deep cavity injection molded parts of copying machines as claimed in claim 4, wherein the front mold core is inserted into the fixing groove of the front mold plate by the front mold wedging block having a trapezoidal shape, and the rear mold core is inserted into the fixing groove of the rear mold plate by the rear mold wedging block having a trapezoidal shape.
6. A method for forming a deep-cavity injection molding part of a copying machine, which is characterized by adopting the precise mold of the deep-cavity injection molding part of the copying machine as claimed in any one of claims 1 to 5, and comprises the following forming steps:
a. preparing materials: taking the model of PC + PETCKA 9371NH as a plastic raw material of a molding injection molding;
b. melting: putting a PC + PETCKA 9371NH plastic raw material into a hot melting device, heating to 245-260 ℃ for melting, and then forming a hot melting material, wherein the hot melting material enters an injection channel;
c. plasticizing: and (3) keeping the hot melt in the injection channel in a molten state, wherein the temperature for keeping the molten state is as follows: 245-260 ℃;
d. die assembly: the front template is driven to be attached to the rear template, the core-pulling slide block slides under the guide of the inclined guide post and the shovel base to penetrate through the space between the front mold core and the rear mold core and then is inserted into the mold cavity, the front mold core is correspondingly matched with the rear mold core, and the mold core insert is inserted into the groove, so that a mold cavity for core-pulling molding of the injection molding piece is formed;
e. injecting materials: in the plastics raw and other materials of molten state exert pressure the injection through runner spare entering hot runner fixed plate's runner, and in the hot melt material entering needle valve formula hot runner in the runner of hot runner fixed plate, the hot melt material in the needle valve formula hot runner heats through the heating module and keeps the molten state, and then the hot melt material gets into mould intracavity shaping injection molding, and the pressure of applying the injection is: 90Mpa, the injection amount is: 50 mm, the molding time is: and 60 seconds, wherein the heating temperature of the heating module is as follows: 245-260 ℃;
f. and (3) cooling: injecting cooling liquid into the cooling channels to cool the temperature of the injection molding piece, enabling the cooling water to be smooth through the spiral water-proof sheets when the cooling channels are slightly staggered, cooling the temperature to 20-30 ℃, and cooling for the following time: 25 seconds;
g. opening the mold: the front template is driven to open the mold, the core-pulling sliding block slides towards the outer side of the mold under the guide of the inclined guide post, and the inclined ejector rod and the straight ejector rod of the ejection mechanism eject an injection molding product under the upward ejection effect of the ejector plate, so that the injection molding product and the mold are demolded.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10100206A (en) * | 1996-09-30 | 1998-04-21 | Pentel Kk | Mold assembly for injection molding |
| CN202781663U (en) * | 2012-09-21 | 2013-03-13 | 深圳市凌波实业有限公司 | General used injection mold of battery box |
| CN203317697U (en) * | 2013-06-28 | 2013-12-04 | 力天模塑(大连)有限公司 | Venous indwelling needle catheter base die |
| CN105415624A (en) * | 2015-08-24 | 2016-03-23 | 思柏精密模具注塑（无锡）有限公司 | Precise mold for paper plate injection molding piece of duplicator |
| CN105643883A (en) * | 2015-12-30 | 2016-06-08 | 优力精密塑胶（苏州工业园区）有限公司 | Front and back mold inclined top release mold and machining method thereof |
| CN205467090U (en) * | 2015-12-30 | 2016-08-17 | 优力精密塑胶（苏州工业园区）有限公司 | Front and back mould pushes up drawing of patterns mould to one side |
| CN106042299A (en) * | 2016-08-15 | 2016-10-26 | 思柏精密模具注塑（无锡）有限公司 | Precise mold of vehicle accumulator shell injection molding parts |
| CN106142473A (en) * | 2016-08-15 | 2016-11-23 | 思柏精密模具注塑（无锡）有限公司 | Mould for photocopier moulding |
| CN206840607U (en) * | 2017-06-14 | 2018-01-05 | 思柏精密模具注塑（无锡）有限公司 | The precision die of duplicator depth chamber moulding |
-
2017
- 2017-06-14 CN CN201710449130.7A patent/CN107186963B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10100206A (en) * | 1996-09-30 | 1998-04-21 | Pentel Kk | Mold assembly for injection molding |
| CN202781663U (en) * | 2012-09-21 | 2013-03-13 | 深圳市凌波实业有限公司 | General used injection mold of battery box |
| CN203317697U (en) * | 2013-06-28 | 2013-12-04 | 力天模塑(大连)有限公司 | Venous indwelling needle catheter base die |
| CN105415624A (en) * | 2015-08-24 | 2016-03-23 | 思柏精密模具注塑（无锡）有限公司 | Precise mold for paper plate injection molding piece of duplicator |
| CN105643883A (en) * | 2015-12-30 | 2016-06-08 | 优力精密塑胶（苏州工业园区）有限公司 | Front and back mold inclined top release mold and machining method thereof |
| CN205467090U (en) * | 2015-12-30 | 2016-08-17 | 优力精密塑胶（苏州工业园区）有限公司 | Front and back mould pushes up drawing of patterns mould to one side |
| CN106042299A (en) * | 2016-08-15 | 2016-10-26 | 思柏精密模具注塑（无锡）有限公司 | Precise mold of vehicle accumulator shell injection molding parts |
| CN106142473A (en) * | 2016-08-15 | 2016-11-23 | 思柏精密模具注塑（无锡）有限公司 | Mould for photocopier moulding |
| CN206840607U (en) * | 2017-06-14 | 2018-01-05 | 思柏精密模具注塑（无锡）有限公司 | The precision die of duplicator depth chamber moulding |
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