CN113954310B - An injection mold - Google Patents
An injection mold Download PDFInfo
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- CN113954310B CN113954310B CN202111210972.XA CN202111210972A CN113954310B CN 113954310 B CN113954310 B CN 113954310B CN 202111210972 A CN202111210972 A CN 202111210972A CN 113954310 B CN113954310 B CN 113954310B
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- mold
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- lower mold
- core
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- 238000002347 injection Methods 0.000 title claims abstract description 34
- 239000007924 injection Substances 0.000 title claims abstract description 34
- 238000001746 injection moulding Methods 0.000 claims abstract description 66
- 238000013519 translation Methods 0.000 claims description 17
- 230000000149 penetrating effect Effects 0.000 claims description 7
- 239000004033 plastic Substances 0.000 description 8
- 229920003023 plastic Polymers 0.000 description 8
- 238000000465 moulding Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000012797 qualification Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012778 molding material Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
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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
- B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
- B29C45/332—Mountings or guides therefor; Drives therefor
-
- 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
- B29C45/64—Mould opening, closing or clamping devices
-
- 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
- B29C45/64—Mould opening, closing or clamping devices
- B29C45/66—Mould opening, closing or clamping devices mechanical
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
本发明公开了一种注塑模具，包括：模芯，模芯包括上模仁、下模仁、活动设置在上模仁与下模仁之间的滑动组件和承托顶出组件，所述下模仁套设在承托顶出组件上端，所述滑动组件上设有用于放置待注塑件的第一安装槽，所述下模仁上设有用于放置待注塑件的第二安装槽，合模时，所述上模仁、下模仁、滑动组件和承托组件之间形成型腔，以及上模座和下模座。本发明采用一种注塑模具，上模仁、下模仁和滑动组件之间设有具有缓冲的弹性件，使得开合模时不产生刚性冲击，减少对模具的损伤；在注塑过程中，上模仁、下模仁和滑动组件之间紧配合，不会产生间隙造成注塑件飞边的问题。
The present invention discloses an injection mold, comprising: a mold core, the mold core comprises an upper mold core, a lower mold core, a sliding assembly movably arranged between the upper mold core and the lower mold core, and a supporting ejection assembly, the lower mold core is sleeved on the upper end of the supporting ejection assembly, the sliding assembly is provided with a first mounting groove for placing the part to be injected, the lower mold core is provided with a second mounting groove for placing the part to be injected, and when the mold is closed, a cavity is formed between the upper mold core, the lower mold core, the sliding assembly and the supporting assembly, as well as an upper mold base and a lower mold base. The present invention adopts an injection mold, wherein an elastic member with a buffer is provided between the upper mold core, the lower mold core and the sliding assembly, so that no rigid impact is generated when the mold is opened and closed, thereby reducing damage to the mold; during the injection molding process, the upper mold core, the lower mold core and the sliding assembly are tightly matched, and no gap is generated to cause the problem of flash of the injection molded part.
Description
Technical Field
The invention relates to the field of molds, in particular to an injection mold.
Background
In mechanical transmission, gear transmission is used as a transmission mode with the widest application, and plastic gears are used as one of gear products, so that the application of the plastic gears in various fields is also increasing. The insert injection molding type gear in the existing market greatly meets the requirement of industrial development. When injection molding, the inserts are required to be positioned first and then injection molded, and burrs and the like are easy to generate when the gears are injection molded, so that the production efficiency is reduced, and the time for workers to select workpieces is prolonged.
For example, chinese patent publication No. 2020 and 09, entitled "Plastic Gear injection mold with an insert", includes a front mold body and a rear mold body, the rear mold body includes a rear mold portion and a bottom plate, the bottom plate is disposed on a side of the rear mold portion away from the front mold body, the rear mold portion is provided with a longitudinally disposed assembly hole for assembling a columnar insert and a laterally positioning structure for laterally positioning the columnar insert, the bottom plate is provided with a longitudinal positioning structure, when assembling the columnar insert, the longitudinal positioning structure can longitudinally pre-position the columnar insert to avoid displacement of the columnar insert during mold assembly, affecting installation accuracy and installation speed of the columnar insert, and when mold assembly, the longitudinal positioning structure and the laterally positioning structure respectively perform longitudinal final positioning and lateral positioning on the columnar insert, thereby enabling the columnar insert to be accurately and rapidly positioned.
The existing patent has the defects that (1) when the die is closed, rigid impact is generated between the upper die core and the lower die core, flash is easy to generate when the gear is injection molded, the product percent of pass and the aesthetic property are reduced, and the later processing cost is increased, and (2) when the die is opened, the injection molding part is directly ejected out, and the injection molding part is easy to damage in the ejection process.
Disclosure of Invention
The invention aims to solve the problem that the production efficiency is reduced due to the fact that burrs are generated during injection molding of gears, and provides an injection mold which is capable of reducing the burrs generated during injection molding of gears, improving the quality of gear products and improving the production efficiency.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
An injection mold, comprising:
The mold core comprises an upper mold core, a lower mold core, a sliding component and a supporting ejection component, wherein the sliding component and the supporting ejection component are movably arranged between the upper mold core and the lower mold core, the lower mold core is sleeved at the upper end of the supporting ejection component, a first mounting groove for placing a part to be molded is formed in the sliding component, a second mounting groove for placing the part to be molded is formed in the lower mold core, and a cavity is formed among the upper mold core, the lower mold core, the sliding component and the supporting component during mold assembly;
The upper die base is sequentially provided with a top plate, an upper die supporting plate and an upper die plate from top to bottom, and the upper die core is positioned on one side of the upper die plate, which faces the die core;
The die comprises a die core, a lower die base, a lower die plate, die legs, a lower die supporting plate and a lower die plate, wherein the lower die base is sequentially provided with the lower die plate, the die legs, the lower die supporting plate and the lower die plate from bottom to top, a moving cavity is formed in one side of the lower die plate, a lower die core is arranged in the moving cavity, sliding components are arranged on two sides of the lower die core in a moving mode, a baffle is arranged on the lower die plate, and a pushing plate is arranged on the baffle.
The top plate is provided with a feeding hole, the top plate and the upper die carrier plate are internally provided with a main runner communicated with the feeding hole, and the upper die carrier plate and the upper die plate are internally provided with a sub-runner communicated with the main runner and the cavity.
When the mold is closed, the upper mold base and the lower mold base are closed, the upper mold core, the lower mold core, the sliding component and the supporting ejection component form a mold cavity in the moving cavity, the sliding component is positioned between the upper mold core and the lower mold core, the supporting ejection component is positioned below the lower mold core, the upper end of the supporting ejection component extends into the mold cavity, and the supporting ejection component is matched with the inner side wall of the injection molding piece. To treat the injection molding and place on first mounting groove and second mounting groove, the material of moulding plastics gets into the die cavity through feed inlet, sprue and auxiliary flow way in proper order, after the completion of moulding plastics, upper die base and die holder separate, remove the slip subassembly, will mould plastics the injection molding that good pass through the ejecting subassembly of bearing and ejecting can.
The first mounting groove and the second mounting groove are convenient to mount the injection molding part to be molded, the injection molding part to be molded is convenient to mount the insert molding mold, and the sliding assembly improves the accuracy of the position of the insert in the injection molding part, and the qualification rate of the injection molding part is improved.
Preferably, the sliding assembly comprises a moving plate and sliding inserts, wherein the moving plate is arranged on two sides of the lower die core, the sliding inserts are arranged on the moving plate, one end of each sliding insert is arranged on the moving plate, the other end of each sliding insert is located above the lower die core, a first mounting groove is formed in the upper end face of each sliding insert, the sliding inserts located on two sides of the lower die core are symmetrically distributed in a one-to-one correspondence mode, when the dies are assembled, the two symmetrically distributed sliding inserts are tightly matched, a translation cylinder is arranged on the lower die plate and located on two sides of the lower die core, an output shaft of the translation cylinder is connected with the moving plate, and the translation cylinder drives the moving plate to move relatively on two sides of the lower die core.
The movable plate is arranged on the movable plate, the movable plates positioned on two sides of the lower die core are symmetrically distributed according to the lower die core, the movable plate moves in the movable groove under the driving of the translation air cylinder, the movable plate drives the sliding inserts to move along two sides of the lower die core in the movable cavity, when in die assembly, the two symmetrically distributed sliding inserts are in tight fit, the first mounting grooves on the two sliding inserts are matched, the injection molding piece to be molded is prevented from being arranged on the first mounting grooves of the two sliding inserts, the die cavities are in one-to-one fit with the split runners, and a plurality of circumferentially distributed pouring gates are correspondingly arranged on each die cavity, and the pouring gates penetrate through the die cavities and the split runners. The sprue that is circumference distribution makes the injection molding more accurate when moulding plastics for the material distributes evenly in the die cavity, improves the qualification rate of injection molding.
Preferably, an elastic piece is arranged between the sliding insert and the moving plate, the elastic piece is perpendicular to the moving plate, limiting plates are arranged on the outer sides of the sliding inserts in a one-to-one correspondence mode, and the limiting plates incline towards one end of the upper die holder to the direction of the first mounting groove. Before die assembly, the inserts are placed in a second mounting groove, the sliding inserts which are symmetrically matched one by one are driven to be tightly matched through a translation cylinder, the inserts are placed in a first mounting groove, then the die assembly is carried out, an upper die holder and a lower die holder are closed, and the sliding inserts are tightly pressed on a lower die core by the inclined surface of a limiting plate, so that flash is not easy to generate during injection molding, and the product percent of pass is reduced.
Preferably, the limiting plates are arranged in the upper die core through countersunk screws, and the limiting plates are in one-to-one correspondence with the outer side walls of one ends of the sliding inserts arranged on the moving blocks. The sliding insert is inclined towards one side of the outer side of the die, the inclined surface is matched with the limiting plate, and when the die is closed, the limiting plate tightly presses the sliding insert on the upper end face of the lower die core through the inclined surface, so that the sliding insert is tightly matched with the lower die core, and when the die is injection molded, gaps are not generated among the upper die core, the lower die core and the sliding insert, and the problem that a part is easy to flash when the die is injection molded is solved.
Preferably, the lower die core comprises die core plates in one-to-one correspondence with the first mounting grooves during die assembly and die core seats for placing the die core plates, a plurality of die core plates are arranged on the die core seats, and second mounting grooves in one-to-one correspondence with the first mounting grooves are formed in the die core plates.
The die core seat is provided with the mounting grooves corresponding to the die core plates one by one, the die core plates correspond to the sliding components one by one, a plurality of injection molding pieces can be injected simultaneously, when the die core plates, the sliding inserts and the like are damaged, the injection molding pieces can be replaced, the maintenance cost is reduced, a plurality of sliding inserts are arranged on one sliding plate, and a plurality of die core plates are arranged on the die core seat, so that the sliding components are driven simultaneously by only one relative translation cylinder when moving, and the working cost is reduced.
Preferably, the supporting ejection assembly comprises a supporting piece for supporting the injection molding piece and a thimble penetrating through the supporting piece, the supporting piece is penetrated in the lower die core, the upper end of the supporting piece is matched with the inner side wall of the injection molding piece, the upper end face of the thimble is flush with the lower end face of the injection molding piece, the thimble is arranged on the push plate, and the thimble sequentially penetrates through the lower die support plate, the lower die plate and the supporting piece.
The upper end of the supporting piece is matched with the inner side wall of the produced injection molding piece, and the supporting piece stretches into the cavity during injection molding. The support piece is fixed to be set up in the lower mould benevolence, wears to be equipped with the thimble that the circumference distributes in the support piece, the thimble lower extreme is equipped with spacing arch and spacing in the push pedal, and the baffle is fixed to be set up the thimble in the push pedal, through countersunk head screw fixation between push pedal and the baffle, and the thimble is used for ejecting the injection molding.
Preferably, the bearing ejection assembly further comprises a first floating needle penetrating through the bearing member and a second floating needle evenly distributed on the outer side of the bearing member, the upper end face of the first floating needle is flush with the lower end face of the injection molding member, the upper end of the second ejector pin is fixedly arranged with the mold core plate, a plurality of grooves are formed in one side, facing the mold core, of the lower mold support plate, a first floating plate and a second floating plate which are fixed through countersunk screws are arranged in the grooves, a spring piece is arranged at the lower end of the second floating plate, the first floating needle is arranged on the first floating plate, the second floating needle is arranged on the first floating plate, and penetrates through the lower mold support plate, the lower mold plate and the bearing member, and the second floating needle penetrates through the lower mold support plate and the lower mold plate.
The first floating needle is located between the injection molding piece and the lower mold supporting plate, the second floating needle is located between the mold core plate and the lower mold supporting plate, the first floating needle and the second floating needle float along the pressure direction of the mold through the spring piece, so that rigid impact is not generated among the upper mold core, the lower mold core and the sliding insert during mold closing and mold opening, and the mold core plate floats during mold opening after cooling of the injection molding piece, so that the injection molding piece is buffered during demolding, and damage to the injection molding piece in the demolding process is reduced.
Preferably, an elastic piece is arranged between the lower die carrier plate and the lower die plate, and the lower die plate is arranged on the lower die carrier plate in a floating mode. The elastic piece adopts the linear spring, be equipped with the guide bar in the linear spring, the guide bar sets up perpendicularly with the lower bolster for the lower bolster can be on the lower bolster along pressure direction floating, when die sinking and compound die, buffering is difficult for producing rigid impact between lower bolster and the lower bolster.
Preferably, an elastic element is arranged between the push plate and the lower die plate, and the elastic element penetrates through the lower die carrier plate. The elastic piece adopts the linear spring, wear to be equipped with the guide bar in the linear spring, the guide bar sets up perpendicularly with the push pedal for push pedal and baffle obtain buffering and spacing when following mould pressure direction and reciprocate under the drive force effect.
Preferably, the top plate is fixed with the upper die supporting plate through countersunk screws, and a guide post and a guide sleeve matched with the guide post are arranged between the upper die supporting plate and the upper die plate.
The invention has the advantages that (1) the elastic piece with buffer is arranged among the upper die core, the lower die core and the sliding component, so that rigid impact is not generated when the die is opened and closed, and the damage to the die is reduced, and (2) in the injection molding process, the upper die core, the lower die core and the sliding component are tightly matched, so that the problem of flash of an injection molding piece caused by gaps is avoided.
Drawings
Fig. 1 is a schematic view of a structure of the present invention.
Fig. 2 is a schematic structural view of a lower die holder according to the present invention.
Fig. 3 is a top view of the lower die holder of the present invention.
Fig. 4 is a cross-sectional view of A-A in fig. 3.
Fig. 5 is a cross-sectional view of B-B in fig. 3.
Fig. 6 is a schematic view of one construction of the bearing and ejector assembly, the moving assembly and the base plate of the present invention.
Fig. 7 is a schematic view of a construction of the bearing and ejector assembly of the present invention with injection molding.
Figure 8 is a cross-sectional view of the present invention with an injection molded component of the bearing and ejector assembly.
Fig. 9 is a schematic view of a structure of a supporting and ejecting assembly and a moving assembly provided with an injection molding part according to the present invention.
FIG. 10 is a schematic view of an injection molding structure according to the present invention.
Fig. 11 is a cross-sectional view of fig. 10.
As shown in the figure, an upper die core 1, a lower die core 2, a die core plate 2.1, a die core seat 2.2,
A sliding component 3, a moving plate 3.1, a sliding insert 3.2,
The supporting ejection assembly 4, the supporting piece 4.1, the thimble 4.2, the first floating needle 4.3, the second floating needle 4.4, the first floating plate 4.5, the second floating plate 4.6 and the spring piece 4.7
A first mounting groove 5, a second mounting groove 6,
An upper die base 7, a top plate 7.1, an upper die carrier plate 7.2, an upper die plate 7.3,
A lower die holder 8, a bottom plate 8.1, die legs 8.2, a lower die carrier plate 8.3, a lower die plate 8.4, a baffle plate 8.5, a push plate 8.6,
The device comprises a moving cavity 9, a translation cylinder 10, a limiting plate 11, a guide post 12, a guide sleeve 13, an injection molding piece 14 and an insert 15.
Detailed Description
In order to make the purposes, technical solutions and advantages of the technical solution embodiments of the present invention more clear, the present invention is further described below with reference to the accompanying drawings and the detailed description.
In the embodiments shown in fig. 1,2, 3,4, 5, 6, 7,8, 9, 10, and 11, an injection mold includes:
The mold core comprises an upper mold core 1, a lower mold core 2, a sliding component 3 and a bearing ejection component 4, wherein the sliding component 3 and the bearing ejection component 4 are movably arranged between the upper mold core 1 and the lower mold core 2, the lower mold core 2 is sleeved at the upper end of the bearing ejection component 4, a first mounting groove 5 for placing a part 14 to be molded is arranged on the sliding component 3, a second mounting groove 6 for placing the part 14 to be molded is arranged on the lower mold core 2, and a cavity is formed among the upper mold core 1, the lower mold core 2, the sliding component 3 and the bearing component during mold closing;
The upper die holder 7 is provided with a top plate 7.1, an upper die carrier plate 7.2 and an upper die plate 7.3 in sequence from top to bottom, the upper die core 1 is positioned on one side of the upper die plate 7.3 facing the die core, the top plate 7.1 is provided with a feed inlet, the top plate 7.1 and the upper die carrier plate 7.2 are internally provided with a main runner communicated with the feed inlet, and the upper die carrier plate 7.2 and the upper die plate 7.3 are internally provided with a sub-runner communicated with the main runner and the die cavity.
The die comprises a die core, a lower die base 8, a lower die base 8.1, die legs 8.2, a lower die supporting plate 8.3 and a lower die plate 8.4, wherein the lower die base 8 is sequentially provided with the bottom plate 8.1, the die legs 8.2, the lower die supporting plate 8.3 and the lower die plate 8.4 from bottom to top, a movable cavity 9 is formed in one side of the lower die plate 8.4, the lower die core 2 is arranged in the movable cavity 9, the sliding components 3 are movably arranged on two sides of the lower die core 2, a baffle plate 8.5 is arranged on the lower die plate 8.4, and a push plate 8.6 is arranged on the baffle plate 8.5.
The mold is provided with cooling water channels, support rods, guide posts 12 and other parts which are indispensable in the prior art.
When the mold is closed, the upper mold seat 7 and the lower mold seat 8 are closed, a cavity is formed by the upper mold core 1, the lower mold core 2, the sliding component 3 and the bearing ejection component 4 in the moving cavity 9, the sliding component 3 is positioned between the upper mold core 1 and the lower mold core 2, the bearing ejection component 4 is positioned below the lower mold core 2, the upper end of the bearing ejection component 4 stretches into the cavity, and the bearing ejection component 4 is matched with the inner side wall of the injection molding piece 14. To-be-injection-molded parts 14 are placed on the first mounting groove 5 and the second mounting groove 6, injection molding materials sequentially enter the cavity through the feed inlet, the main runner and the auxiliary runner, after injection molding is completed, the upper die holder 7 and the lower die holder 8 are separated, the sliding assembly 3 is moved, and the injection-molded parts 14 are ejected through the bearing ejection assembly 4.
The first mounting groove 5 and the second mounting groove 6 are convenient to mount the injection molding piece 14, the injection molding piece 14 is convenient to mount the injection molding piece 15 type injection mold, the sliding assembly 3 improves the accuracy of the position of the insert 15 in the injection molding piece 14, and the qualification rate of the injection molding piece 14 is improved.
According to the injection mold disclosed in the above embodiment, the insert 15 is positioned by the sliding component 3 and the insert 15 is positioned by the lower mold core 2, so that the insert 15 is accurately positioned in the cavity, the insert 15 cannot deviate in the injection molding process, the moving component can float, and the injection molding piece 14 is not easy to generate flash and other problems in the injection molding process.
As shown in fig. 2, 3, 4, 5, 6, 8 and 9, the sliding assembly 3 comprises a moving plate 3.1 arranged on two sides of a lower die core 2 and a sliding insert 3.2 arranged on the moving plate 3.1, one end of the sliding insert is arranged on the moving plate 3.1, the other end of the sliding insert 3.2 is positioned above the lower die core 2, a first mounting groove 5 is formed in the upper end face of the sliding insert, the sliding inserts 3.2 positioned on two sides of the lower die core 2 are symmetrically distributed in a one-to-one correspondence manner, during die assembly, the two sliding inserts which are symmetrically distributed are in tight fit, a translation cylinder 10 is arranged on the lower die plate 8.4, an output shaft of the translation cylinder 10 is connected with the moving plate 3.1, and the translation cylinder 10 drives the moving plate 3.1 to relatively move on two sides of the lower die core 2.
The movable plate 3.1 is provided with a plurality of sliding inserts, the movable plates 3.1 positioned at two sides of the lower die core 2 are symmetrically distributed according to the lower die core 2, the movable plates 3.1 move in the movable grooves under the driving of the translation air cylinders 10, the movable plates 3.1 drive the sliding inserts 3.2 to move along two sides of the lower die core 2 in the movable cavity 9, when the die is closed, the two symmetrically distributed sliding inserts 3.2 are tightly matched, the first mounting grooves 5 on the two sliding inserts 3.2 are matched, the to-be-molded part 14 is prevented from being arranged on the first mounting grooves 5 of the two sliding inserts 3.2, the die cavities are in one-to-one fit with the split runners, a plurality of circumferentially distributed pouring gates are correspondingly arranged on each die cavity, and the pouring gates penetrate through the die cavities and the split runners. The sprue distributed circumferentially enables injection molding to be more accurate during injection molding, so that injection molding materials in the cavity are distributed uniformly, and the qualification rate of injection molding parts 14 is improved.
Insert 15 is positioned through sliding component 3 and insert 15 is positioned to lower mould benevolence 2 for insert 15 accurate location is in the die cavity, makes the mould can not produce the skew at the in-process of moulding plastics insert 15.
As shown in fig. 2, 3, 4,5 and 6, an elastic piece is arranged between the sliding insert and the moving plate 3.1, the elastic piece is perpendicular to the moving plate 3.1, limiting plates 11 are arranged on the outer sides of the sliding insert in a one-to-one correspondence manner, and the limiting plates 11 incline towards the direction of the first mounting groove 5 towards one end of the upper die holder 7. Before die assembly, the insert 15 is placed in the second mounting groove 6, the sliding inserts 3.2 which are symmetrically matched one by one are in close fit through the translation cylinder 10, the insert 15 is placed in the first mounting groove 5, then the die assembly is carried out, the upper die holder 7 and the lower die holder 8 are closed, the sliding insert 3.2 is tightly pressed on the lower die core 2 by the inclined surface of the limiting plate 11, and therefore, flash is not easy to generate during injection molding, and the product percent of pass is reduced.
As shown in fig. 4,5 and 6, the limiting plate 11 is arranged in the upper die core 1 through countersunk screws, and the limiting plate 11 is in one-to-one correspondence with the outer side wall of one end of the sliding insert 3.2 arranged on the moving block. The side surface of the sliding insert facing the outer side of the die is an inclined surface, the inclined surface is matched with the limiting plate 11, and when the die is closed, the limiting plate 11 tightly presses the sliding insert 3.2 on the upper end surface of the lower die core 2 through the inclined surface, so that the sliding insert 3.2 is tightly matched with the lower die core 2, and when the die is injection molded, gaps are not generated among the upper die core 1, the lower die core 2 and the sliding insert 3.2, and the problem that a part is easy to flash when the die is injection molded is solved.
As shown in fig. 4, 5, 6 and 7, the lower die core 2 includes a die core plate 2.1 corresponding to the first mounting grooves 5 one by one during die assembly and a die core seat 2.2 for placing the die core plate 2.1, a plurality of die core plates 2.1 are arranged on the die core seat 2.2, and second mounting grooves 6 corresponding to the first mounting grooves 5 one by one are arranged on the die core plate 2.1.
The die core seat 2.2 is provided with mounting grooves corresponding to the die core plates 2.1 one by one, the die core plates 2.1 correspond to the sliding components 3 one by one, a plurality of injection molding pieces 14 can be simultaneously injected, when the die core plates 2.1, the sliding inserts 3.2 and the like are damaged, replacement can be performed, maintenance cost is reduced, a plurality of the sliding inserts 3.2 are arranged on one sliding plate, a plurality of the die core plates 2.1 are arranged on the die core seat 2.2, and the sliding components 3 are driven by only one relative translation cylinder 10 during movement, so that working cost is reduced.
The die core seat 2.2 is provided with a groove for installing the die core plate 2.1, the die core plate 2.1 is provided with a plurality of limiting partition plates, and the sliding insert 3.2 moves in the limiting partition plates and is used for guiding the sliding insert 3.2. The guide groove is arranged at the lower end of the moving block, the guide plate is arranged at the lower end of the moving plate 3.1, and the guide block is arranged on the guide plate, so that the moving plate 3.1 does not deviate when moving in the moving cavity 9.
As shown in fig. 4,5, 6, 7, 8 and 9, the supporting and ejecting assembly 4 comprises a supporting member 4.1 for supporting the injection molding member 14, and a thimble 4.2 penetrating through the supporting member 4.1, wherein the supporting member 4.1 is penetrated in the lower die core 2, the upper end of the supporting member 4.1 is matched with the inner side wall of the injection molding member 14, the upper end surface of the thimble 4.2 is flush with the lower end surface of the injection molding member 14, the thimble 4.2 is arranged on the push plate 8.6, and the thimble 4.2 sequentially penetrates through the lower die supporting plate 8.3, the lower die plate 8.4 and the supporting member 4.1.
The upper end of the support 4.1 is matched with the inner side wall of the produced injection molding piece 14, and the support 4.1 stretches into the cavity during injection molding. The support piece 4.1 is fixedly arranged in the lower die core 2, the circumferentially distributed ejector pins 4.2 are arranged in the support piece 4.1 in a penetrating manner, the lower end of each ejector pin 4.2 is provided with a limiting protrusion which is limited on the push plate 8.6, the ejector pins 4.2 are fixedly arranged on the push plate 8.6 by the baffle plate 8.5, the push plate 8.6 and the baffle plate 8.5 are fixed by countersunk screws, and the ejector pins 4.2 are used for ejecting the injection molding piece 14.
As shown in fig. 4, 5, 6, 7, 8 and 9, the supporting ejection assembly 4 further comprises a first floating needle 4.3 penetrating through the supporting member 4.1 and a second floating needle uniformly distributed on the outer side of the supporting member 4.1, the upper end surface of the first floating needle 4.3 is flush with the lower end surface of the injection molding member 14, the upper end of the second ejector pin 4.2 is fixedly arranged with the mold core plate 2.1, a plurality of grooves are formed in one side, facing the mold core, of the lower mold support plate 8.3, of the first floating plate 4.5 and the second floating plate 4.6 fixed through countersunk screws are formed in the grooves, a spring piece 4.7 is arranged at the lower end of the second floating plate 4.6, the first floating needle 4.3 is arranged on the first floating plate 4.5, the second floating needle is arranged on the first floating plate 4.5, the first floating needle 4.3 penetrates through the lower mold support plate 8.3, the lower mold plate 8.4 and the lower mold support plate 8.4.1, and the lower mold support plate 8.3.
The first floating needle 4.3 is located between the injection molding piece 14 and the lower die carrier plate 8.3, the second floating needle is located between the die core plate 2.1 and the lower die carrier plate 8.3, the first floating needle 4.3 and the second floating needle float along the pressure direction of the die through the spring piece 4.7, so that rigid impact is not generated among the upper die core 1, the lower die core 2 and the sliding insert 3.2 during die assembly and die opening, and the die core plate 2.1 floats during die opening after the injection molding piece 14 is cooled, so that the injection molding piece 14 is buffered during die stripping, and damage to the injection molding piece 14 during the die stripping process is reduced.
As shown in fig. 5, an elastic member is provided between the lower die carrier plate 8.3 and the lower die plate 8.4, and the lower die plate 8.4 is floatingly provided on the lower die carrier plate 8.3. The elastic piece adopts the linear spring, is equipped with the guide bar in the linear spring, and the guide bar sets up perpendicularly with lower bolster 8.4 for lower bolster 8.4 can be on lower bolster 8.3 along pressure direction float, when die sinking and compound die, cushion between lower bolster 8.3 and the lower bolster 8.4, be difficult for producing rigid impact.
As shown in fig. 8, an elastic member is provided between the push plate 8.6 and the lower die plate 8.4, and penetrates through the lower die carrier plate 8.3. The elastic piece adopts a linear spring, a guide rod is arranged in the linear spring in a penetrating way, and the guide rod is perpendicular to the push plate 8.6, so that the push plate 8.6 and the baffle plate 8.5 are buffered and limited when moving up and down along the pressure direction of the die under the action of driving force.
As shown in fig. 5, the top plate 7.1 and the upper die carrier plate 7.2 are fixed by countersunk screws, and a guide post 12 and a guide sleeve 13 matched with the guide post 12 are arranged between the upper die carrier plate 7.2 and the upper die plate 7.3.
The above embodiments are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. All equivalent changes in shape and structure according to the present invention are intended to be included in the scope of the present invention.
Claims (10)
1. The injection mold is characterized by comprising a mold core, an upper mold seat, an upper mold support plate and an upper mold plate, wherein the mold core comprises an upper mold core, a lower mold core, a sliding component and a bearing ejection component, the sliding component and the bearing ejection component are movably arranged between the upper mold core and the lower mold core, the lower mold core is sleeved at the upper end of the bearing ejection component, a first mounting groove for placing a part to be injection molded is formed in the sliding component, a second mounting groove for placing the part to be injection molded is formed in the lower mold core, a cavity is formed between the upper mold core, the lower mold core, the sliding component and the bearing component during mold closing, the upper mold seat is sequentially provided with a top plate, an upper mold support plate and an upper mold plate from top to bottom, the upper mold core is positioned at one side of the upper mold plate facing the mold core, the lower mold seat is sequentially provided with a bottom plate, mold legs, a lower mold support plate and a lower mold plate, a moving cavity is formed at one side of the lower mold plate facing the mold core, the lower mold core, the sliding component is movably arranged in the moving cavity, two sides of the lower mold core, a baffle plate is arranged on the lower mold plate, a push plate is arranged on the baffle plate, a bearing ejection component comprises a bearing part for supporting the part and a first floating pin and a second floating pin and a floating pin penetrating the bearing part in the bearing part are uniformly distributed between the bearing part and the first floating pin and the floating pin.
2. The injection mold of claim 1, wherein the sliding assembly comprises a moving plate and sliding inserts, the moving plates are arranged on two sides of the lower mold core, the sliding inserts are arranged on the moving plate, one ends of the sliding inserts are arranged on the moving plate, the other ends of the sliding inserts are located above the lower mold core, the upper end faces of the sliding inserts are provided with first mounting grooves, the sliding inserts located on two sides of the lower mold core are symmetrically distributed in a one-to-one correspondence mode, when the mold is closed, the two sliding inserts in the symmetrical distribution mode are in tight fit, the lower mold plate is provided with translation air cylinders, the translation air cylinders are located on two sides of the lower mold core, an output shaft of each translation air cylinder is connected with the corresponding moving plate, and the translation air cylinders drive the corresponding moving plates to move relatively on two sides of the lower mold core.
3. The injection mold of claim 2, wherein an elastic member is arranged between the sliding insert and the moving plate, the elastic member is perpendicular to the moving plate, limiting plates are arranged on the outer sides of the sliding inserts in a one-to-one correspondence manner, and the limiting plates incline towards the first mounting groove toward one end of the upper mold base.
4. An injection mold according to claim 3, wherein the limiting plates are disposed in the upper mold plate by countersunk screws, and the limiting plates are in one-to-one correspondence with the outer side walls of one end of the sliding insert disposed on the moving block.
5. The injection mold of claim 1, wherein the lower mold core comprises mold core plates corresponding to the first mounting grooves one by one during mold closing and mold core seats for placing the mold core plates, a plurality of mold core plates are arranged on the mold core seats, and second mounting grooves corresponding to the first mounting grooves one by one are arranged on the mold core plates.
6. The injection mold of claim 1 wherein the support ejector assembly comprises a pin disposed in the support member in a manner of being disposed in the lower mold insert, the upper end of the support member being engaged with the inner sidewall of the injection mold, the upper end of the pin being flush with the lower end of the injection mold, the pin being disposed in the push plate and passing through the lower mold carrier, the lower mold plate and the support member in sequence.
7. The injection mold according to claim 1 or 6, wherein the upper end face of the first floating needle is flush with the lower end face of the injection molding member, the upper end of the second floating needle is fixedly arranged with the mold core plate, a plurality of grooves are formed in one side of the lower mold support plate, which faces the mold core, a first floating plate and a second floating plate which are fixed through countersunk screws are arranged in the grooves, a spring piece is arranged at the lower end of the second floating plate, the first floating needle is arranged on the first floating plate, the second floating needle is arranged on the first floating plate, and the first floating needle penetrates through the lower mold support plate, the lower mold plate and the support member, and the second floating needle penetrates through the lower mold support plate and the lower mold plate.
8. An injection mold according to claim 1, wherein an elastic member is provided between the lower mold carrier plate and the lower mold plate, and the lower mold plate is floatingly provided on the lower mold carrier plate.
9. An injection mold according to claim 1, wherein an elastic member is provided between the push plate and the lower die plate, and the elastic member penetrates through the lower die carrier plate.
10. The injection mold according to claim 1, wherein the top plate and the upper mold carrier plate are fixed by countersunk screws, and a guide post and a guide sleeve matched with the guide post are arranged between the upper mold carrier plate and the upper mold plate.
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| CN120481207B (en) * | 2025-07-21 | 2025-10-21 | 成都宝利根创科电子有限公司 | In-mold automatic assembly device and method for plastic mold |
| CN121290716B (en) * | 2025-12-10 | 2026-02-17 | 厦门华晔精密科技有限公司 | An injection molding die and method for thin-walled products |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111231244A (en) * | 2020-02-12 | 2020-06-05 | 东莞力浦精密电子有限公司 | Helical gear injection mold and helical gear |
| CN210705812U (en) * | 2019-10-08 | 2020-06-09 | 东莞市星火齿轮有限公司 | Plastic gear injection mold with inserts |
| CN216300026U (en) * | 2021-10-18 | 2022-04-15 | 宁波拓普电器有限公司 | Injection mold |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2005240940A (en) * | 2004-02-27 | 2005-09-08 | Nsk Ltd | Resin gear |
| CN211763189U (en) * | 2019-11-12 | 2020-10-27 | 珠海艾诚精密模具有限公司 | Embedded injection mold with sliding insert |
| CN211074511U (en) * | 2019-11-21 | 2020-07-24 | 威海恒锐精密机械有限公司 | A mould for processing gear for printer |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210705812U (en) * | 2019-10-08 | 2020-06-09 | 东莞市星火齿轮有限公司 | Plastic gear injection mold with inserts |
| CN111231244A (en) * | 2020-02-12 | 2020-06-05 | 东莞力浦精密电子有限公司 | Helical gear injection mold and helical gear |
| CN216300026U (en) * | 2021-10-18 | 2022-04-15 | 宁波拓普电器有限公司 | Injection mold |
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