CN118493788A - Injection molding system and method for complex curved surface injection molding part - Google Patents
Injection molding system and method for complex curved surface injection molding part Download PDFInfo
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- CN118493788A CN118493788A CN202410785513.1A CN202410785513A CN118493788A CN 118493788 A CN118493788 A CN 118493788A CN 202410785513 A CN202410785513 A CN 202410785513A CN 118493788 A CN118493788 A CN 118493788A
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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
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
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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
- B29C45/1756—Handling of moulds or mould parts, e.g. mould exchanging means
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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
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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
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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
- B29C45/38—Cutting-off equipment for sprues or ingates
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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
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/58—Details
- B29C45/60—Screws
-
- 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
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/58—Details
- B29C45/62—Barrels or cylinders
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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
- B29C45/72—Heating or cooling
- B29C45/74—Heating or cooling of the injection unit
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
本发明公开了一种复杂曲面注塑件的注塑加工系统及成型方法，涉及注塑件注塑加工的技术领域。本发明包括设置在加工机床上的遮挡防护罩，还包括送料熔融单元、注塑加压单元、塑型调整单元；送料熔融单元内设置有用于输送注塑物料的送料组件与加热融化注塑物料的熔融组件；注塑加压单元由加压组件与剪切组件构成；塑型调整单元包括定位组件与模腔调整组件。优点在于：本发明通过采用螺旋推送加热熔融并配合液压加压的方式，可快速完成注塑物料的稳定注塑，并灵活调整注塑模腔的内部形状，可注塑出多种具有不同复杂曲面的注塑件，并可对注塑物料施加稳定均衡的外部压力，使注塑物料可与注塑模腔紧密贴合，提高成型注塑件的完整性。
The present invention discloses an injection molding system and molding method for complex curved surface injection molding parts, and relates to the technical field of injection molding processing of injection molding parts. The present invention includes a shielding protective cover arranged on a processing machine tool, and also includes a feeding and melting unit, an injection molding pressurizing unit, and a molding adjustment unit; the feeding and melting unit is provided with a feeding component for conveying injection molding materials and a melting component for heating and melting the injection molding materials; the injection molding pressurizing unit is composed of a pressurizing component and a shearing component; the molding adjustment unit includes a positioning component and a mold cavity adjustment component. The advantages are: the present invention can quickly complete the stable injection molding of the injection molding material by adopting a spiral push heating and melting method combined with hydraulic pressurization, and flexibly adjust the internal shape of the injection molding cavity, and can injection mold a variety of injection molding parts with different complex curved surfaces, and can apply a stable and balanced external pressure to the injection molding material, so that the injection molding material can fit tightly with the injection molding cavity, thereby improving the integrity of the molded injection molding parts.
Description
Technical Field
The invention relates to the technical field of injection molding, in particular to an injection molding system and a molding method of a complex curved surface injection molding.
Background
The injection molding system is a plastic processing technology for injecting molten plastic material into a cavity of an injection mold and cooling to prepare a part with a required shape, and has the advantages of high efficiency, high precision, short production period, low cost and the like;
The existing injection molding system adopts various modes to realize the processing of injection molding, for example, chinese patent publication No. CN115157554A discloses a plastic part injection molding device capable of carrying out batch injection molding processing, and aims at the problems that when materials in the existing charging barrel are used up, the materials need to be replenished, the heating process cannot work, the charging barrel is relatively high, and the material replenishing is inconvenient, the existing injection molding system provides a scheme that the injection molding system comprises a vertical plate, one side of the vertical plate is fixedly connected with a supporting frame, the top of the supporting frame is rotationally connected with a rotating disc, and the top of the rotating disc is fixedly connected with a plurality of lower modules;
The existing injection molding system can only perform injection molding to obtain an injection molding part with one shape when a mold is not replaced, and when the injection molding part with a complex curved surface shape is subjected to injection molding, the integral pressure applied to injection molding materials is insufficient, so that the injection molding materials cannot be tightly attached to the inner wall of the complex curved surface mold, the injection molding part has poor molding effect, for example, in the prior art, the mold of the device is single, a plurality of injection molding parts with different complex curved surface shapes cannot be rapidly molded, the injection molding materials in an injection molding mold cavity and the materials in an injection molding pipe cannot be cut off after injection molding, the upper end of the injection molding part after cooling molding and the residual materials in the injection molding pipe are integrally molded, additional cutting is needed during demolding in later period, and the demolding is difficult, so that the injection molding device has certain limitation;
therefore, there is a need to design an injection molding system and a molding method for complex curved injection molding to solve the above problems.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an injection molding system and a molding method of a complex curved surface injection molding piece, which solve the problems in the prior art.
In order to achieve the above purpose, the invention is realized by the following technical scheme: the injection molding system for the complex curved surface injection molding part comprises a shielding protective cover arranged on a processing machine tool, a feeding melting unit, an injection molding pressurizing unit and a molding adjusting unit, wherein a control console is arranged on the shielding protective cover;
the feeding melting unit is used for feeding and heating melting injection molding materials, and a feeding component used for conveying the injection molding materials and a melting component used for heating and melting the injection molding materials are arranged in the feeding melting unit;
The injection molding pressurizing unit is composed of a pressurizing component and a shearing component, wherein the pressurizing component is used for pressurizing the molten injection molding material and injecting the molten injection molding material into the molding adjusting unit for injection molding, and the shearing component is used for shearing and removing the redundant injection molding material after injection molding is completed;
The molding adjusting unit comprises a positioning assembly and a die cavity adjusting assembly, wherein the positioning assembly is used for carrying out combined positioning of injection molds, an injection molding die cavity used for molding injection molding pieces is arranged in the positioning assembly, and the die cavity adjusting assembly is used for adjusting the internal shape of the injection molding die cavity so as to realize injection molding of injection molding pieces with various shapes.
Preferably, the feeding assembly comprises a fixed box fixedly arranged on the processing machine tool, an injection molding transverse pipe is fixedly arranged outside the fixed box, a feeding hopper for collecting injection molding materials is fixedly communicated with the injection molding transverse pipe, and the feeding hopper is matched with an external feeding system;
The hydraulic injection molding device is characterized in that a servo motor is fixedly arranged in the fixed box, a hydraulic pushing rod is fixedly arranged on the driving end of the servo motor, an injection molding screw rod is fixedly arranged on the driving end of the hydraulic pushing rod, and the injection molding screw rod is positioned in the injection molding transverse tube.
Preferably, the melting assembly comprises a plurality of heating rings fixedly mounted outside the injection molding transverse tube, a heating tube is fixedly mounted in each heating ring, and a heat conducting rod is fixedly mounted between each heating ring and the injection molding transverse tube.
Preferably, the pressurizing assembly comprises a pressurizing conical head fixedly arranged at the end part of the injection molding screw rod, a pressurizing pump for pressurizing the molten injection molding material is arranged in the injection molding transverse pipe, an exhaust pipe is arranged at the end part of the injection molding transverse pipe, and an electric valve is arranged in the exhaust pipe.
Preferably, the positioning assembly comprises a hydraulic positioning rod fixedly arranged on the shielding protective cover, a molding die is fixedly arranged on the driving end of the hydraulic positioning rod, a positioning die is fixedly arranged on the processing machine tool, an injection hole matched with the injection transverse pipe is formed in the positioning die, a molding die cavity for molding an injection part is formed in the positioning die, the molding die cavity is communicated with the injection hole, and a cooling system is arranged in the positioning die;
The shaping mold is fixedly provided with a plurality of positioning bolts, and a plurality of positioning holes matched with the positioning bolts are formed in the positioning mold.
Preferably, the shearing assembly comprises a fixing frame fixedly arranged outside the positioning die, a middle position shaft is rotatably arranged on the fixing frame, a limiting groove matched with the injection molding hole is formed in the positioning die, a shearing knife is fixedly arranged in the limiting groove through a plurality of extrusion springs, and a driving mechanism is arranged between the shearing knife and the injection molding transverse tube.
Preferably, the driving mechanism comprises a driving push rod fixedly arranged on the pressurizing conical head, a driven push rod matched with the driving push rod is slidably arranged on the injection molding transverse pipe, a lower push plate matched with the driven push rod is fixedly arranged at the lower part of the middle position shaft, an upper push rod is fixedly arranged at the side part of the middle position shaft, a connecting shaft is rotatably arranged on the shearing knife, and one end, far away from the middle position shaft, of the upper push rod is fixedly arranged on the connecting shaft.
Preferably, the die cavity adjusting assembly comprises a molding box fixedly arranged on a molding die, the molding box is matched with the forming die cavity, and an elastic soft template is fixedly arranged on the molding box;
the space between the elastic soft template and the molding cavity is an injection molding cavity for injection molding of an injection molding piece, a plurality of electric telescopic rods are fixedly arranged in the molding box, and a molding extrusion roller matched with the elastic soft template is fixedly arranged at the driving end of each electric telescopic rod;
The processing machine tool is provided with a discharge chute for discharging injection molding pieces, and the shielding protective cover is provided with an observation window for observing injection molding conditions.
An injection molding method of a complex curved surface injection molding part is used for the injection molding system and comprises the following steps:
S1, controlling an external feeding system to inject quantitative injection molding materials into a feeding and melting unit through a control console, conveying the injection molding materials through a feeding assembly in the feeding and melting unit, and heating and melting the injection molding materials through a melting assembly in the conveying process;
S2, controlling a positioning assembly in the molding adjusting unit and a die cavity adjusting assembly to start through a control console, enabling an injection molding die cavity to be molded through the starting positioning assembly, and adjusting the shape of an inner curved surface of the injection molding die cavity through the die cavity adjusting assembly, so that an injection molding die cavity with a complex curved surface is formed;
S3, controlling a pressurizing assembly in the injection pressurizing unit to start pressurizing the molten injection molding material through a control console, injecting the molten injection molding material into an injection molding cavity in the molding adjusting unit, and after the injection molding material in the injection molding cavity is cooled and solidified, finishing processing the injection molding piece;
S4, after the injection molding material is pressurized and injected, the shearing assembly synchronously starts to shear and block the rear part of the injection molding material, and the rear part of the injection molding piece is demolded before the injection molding material is not completely cooled;
S5, after the injection molding piece is cooled and molded, the positioning assembly is controlled by the control console to release the positioning of the injection molding piece, so that the injection molding piece automatically falls down to finish demolding and unloading.
Preferably, after the demolding of the last injection molding piece is finished, the inner curved surface shape of the injection molding cavity is adjusted again through the cavity adjusting assembly, so that the injection molding of the injection molding pieces with different curved surface shapes is performed.
The invention provides an injection molding system and a molding method of a complex curved surface injection molding piece. The beneficial effects are as follows:
1. When the injection molding system is used for injection molding of injection molding parts, the spiral pushing and the matching surrounding heating are adopted, so that the quick pushing and pressurizing of injection molding materials can be realized, the injection molding materials can be circularly heated and melted while being rotationally pushed, and the melting uniformity and efficiency are high.
2. This injection molding system is when carrying out the injection molding of injection molding, through adopting hydraulic push rod to drive the removal of pressurization conical head and extrude and cooperate the screw rod screw extrusion's that moulds plastics mode, can apply stable injection molding pressure to the material after the melting, improve injection molding's stability to can accomplish the emission of the interior unnecessary air of horizontal intraductal of moulding plastics in step, can avoid the air to get into the shaping of influence injection molding in the die cavity of moulding plastics.
3. When the injection molding system is used for injection molding of injection molding pieces, the shape of the inner space of the injection molding cavity can be flexibly adjusted according to actual production requirements, so that various injection molding pieces with different complex curved surfaces can be injection molded, and the preparation range is wider.
4. This injection molding system can be after the material of moulding plastics is accomplished when carrying out the injection molding of injection molding to before the material of moulding plastics does not cool off the shaping, can cut the unnecessary material that is located the downthehole of moulding plastics through vertical shearing's mode and cut, can effectively avoid its tip and the downthehole residual material of moulding plastics to bond fixedly after the injection molding, make the drawing of patterns more save trouble.
5. When the injection molding system is used for injection molding of injection molding pieces, the shape of the elastic soft template can be changed by the mode that the plastic extrusion rollers are pushed by the plurality of groups of electric telescopic rods, so that injection molding pieces with different curved surface shapes can be injection molded, injection molding materials in the injection molding cavity can be pressurized again, the adhesion between the injection molding materials and the elastic soft template is tighter, and the integrity of the injection molding pieces is improved.
In summary, the invention can rapidly finish stable injection molding of injection molding materials by adopting a mode of spiral pushing, heating and melting and matching with hydraulic pressurization, flexibly adjust the internal shape of the injection molding cavity, can inject various injection molding pieces with different complex curved surfaces, and can apply stable and balanced external pressure to the injection molding materials, so that the injection molding materials can be closely attached to the injection molding cavity, and the integrity of the molded injection molding pieces is improved.
Drawings
The invention is described in further detail below with reference to the attached drawing figures, wherein:
FIG. 1 is a schematic diagram of an injection molding system and a molding method for a complex curved injection molding part according to the present invention;
FIG. 2 is a block diagram illustrating the operation of the control system of the present injection molding system;
FIG. 3 is a schematic view of the structure of FIG. 1 with the shield cover removed;
FIG. 4 is a schematic view of the structure of FIG. 3 with the machine tool removed;
FIG. 5 is an exploded view of the structure of FIG. 4;
FIG. 6 is a schematic view of the structure of the stationary box and the injection cross tube of FIG. 5;
FIG. 7 is a schematic diagram of the upper structure of a servo motor according to the present invention;
FIG. 8 is a schematic diagram of a connection structure among a positioning mold, an injection mold and an injection cross pipe in the invention;
FIG. 9 is a top view of FIG. 8;
FIG. 10 is a cross-sectional view of the structure of A-A in FIG. 9;
FIG. 11 is a schematic perspective view of FIG. 10;
FIG. 12 is a schematic view of the upper structure of the fixture and the pressure cone of FIG. 10;
Fig. 13 is an exploded view of the structure of fig. 11.
In the figure: the device comprises a processing machine tool 1, a shielding protective cover 2, a control console 3, an observation window 4, a fixed box 5, a feeding hopper 6, an injection molding transverse pipe 7, a discharge chute 8, a heating ring 9, a hydraulic positioning rod 10, a positioning die 11, a molding die 12, a fixed frame 13, an injection molding hole 14, a positioning bolt 15, an elastic soft template 16, a servo motor 17, a hydraulic pushing rod 18, an injection molding screw rod 19, a pressurizing cone head 20, an exhaust pipe 21, a driven push rod 22, a molding cavity 23, a molding box 24, an electric telescopic rod 25, a limiting groove 26, a push plate 27, a middle shaft 28, an upper push rod 29, a shearing knife 30, a squeezing spring 31, a driving push rod 32, a squeezing roller 34 and a positioning hole.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Example 1
Referring to fig. 1 to 5, an injection molding system for complex curved injection molding parts comprises a shielding and protecting cover 2 arranged on a processing machine tool 1, a feeding melting unit, an injection molding pressurizing unit and a molding adjusting unit;
A control console 3 is arranged on the shielding protective cover 2, a plurality of groups of control sensors are arranged in the control console 3 and used for accurately controlling the opening, closing and running states of the feeding melting unit, the injection molding pressurizing unit and the molding adjusting unit, and the plurality of groups of control sensors in the control console 3 are collectively called as a control assembly;
an observation window 4 for observing injection molding conditions is arranged on the shielding protective cover 2, and the injection molding state can be observed through the observation window 4.
Example two
Referring to fig. 3 to fig. 7, the distinguishing technical scheme of the present embodiment compared with the first embodiment is as follows: the feeding melting unit is used for feeding and heating melting injection molding materials, and a feeding component used for conveying the injection molding materials and a melting component used for heating and melting the injection molding materials are arranged in the feeding melting unit;
The feeding assembly comprises a fixed box 5 fixedly arranged on the processing machine tool 1, an injection molding transverse pipe 7 is fixedly arranged outside the fixed box 5, a feeding hopper 6 for collecting injection molding materials is fixedly communicated with the injection molding transverse pipe 7, and the feeding hopper 6 is matched with an external feeding system;
the control console 3 controls the externally connected feeding system to start, quantitative injection molding materials are injected into the feed hopper 6 and automatically slide into the injection molding transverse tube 7 under the action of gravity, so that automatic feeding is completed.
The servo motor 17 is fixedly installed in the fixed box 5, the hydraulic pushing rod 18 is fixedly installed on the driving end of the servo motor 17, the injection molding screw rod 19 is fixedly installed on the driving end of the hydraulic pushing rod 18, the injection molding screw rod 19 is located in the injection molding transverse tube 7, the servo motor 17 is started to drive the injection molding screw rod 19 to rotate through the hydraulic pushing rod 18, the injection molding screw rod 19 rotates to push the injection molding material in the injection molding transverse tube 7 forward, so that the automatic pushing of the injection molding material is carried out, the injection molding material can be pressurized when being pushed, and the internal pressure of the injection molding material is improved.
In a further embodiment, the melting assembly comprises a plurality of heating rings 9 fixedly arranged outside the injection molding transverse tube 7, a heating pipe is fixedly arranged in each heating ring 9, and a heat conducting rod is fixedly arranged between each heating ring 9 and the injection molding transverse tube 7;
The injection molding material is pushed forward, and heating pipes in the heating rings 9 can start heating, heat is conducted into the injection molding transverse pipe 7 through the heat conducting rod, and the injection molding material in the injection molding transverse pipe 7 can be heated and melted, so that the injection molding material is melted into a liquid state for conveying, and subsequent injection molding is facilitated.
Example III
Referring to fig. 1 to 3 and fig. 8 to 13, the distinguishing technical scheme of the present embodiment compared with the second embodiment is as follows: the injection molding pressurizing unit consists of a pressurizing component and a shearing component, wherein the pressurizing component is used for pressurizing the molten injection molding material and injecting the molten injection molding material into the molding adjusting unit for injection molding;
the pressurizing assembly comprises a pressurizing conical head 20 fixedly arranged at the end part of the injection molding screw rod 19, a pressurizing pump for pressurizing the melted injection molding material is arranged in the injection molding transverse pipe 7, an exhaust pipe 21 is arranged at the end part of the injection molding transverse pipe 7, and an electric valve is arranged in the exhaust pipe 21;
When the injection molding screw rod 19 pushes the molten injection molding material to the end part of the injection molding transverse pipe 7, the hydraulic pushing rod 18 in the pressurizing pump and feeding assembly is started at the moment, the injection molding screw rod 19 and the pressurizing conical head 20 are pushed to move in the injection molding transverse pipe 7, namely, the injection molding material is pressurized and pushed to move continuously;
When the injection molding material moves, the exhaust pipes 21 are synchronously opened, air in the injection molding transverse pipe 7 is extruded through the exhaust pipes 21 when the injection molding material moves, and the exhaust pipes 21 are immediately closed after the air is extruded, so that the air is prevented from being mixed into the injection molding material more, and the air is prevented from entering an injection molding cavity along with the injection molding material, so that negative influence is caused on the molding of injection molding pieces.
In a further embodiment, a positioning die 11 is fixedly installed on the processing machine tool 1, an injection molding hole 14 matched with the injection molding transverse tube 7 is formed in the positioning die 11, a shearing assembly is used for shearing and removing redundant injection molding materials after injection molding is completed, the shearing assembly comprises a fixing frame 13 fixedly installed outside the positioning die 11, a middle shaft 28 is rotatably installed on the fixing frame 13, a limit groove 26 matched with the injection molding hole 14 is formed in the positioning die 11, a shearing blade 30 is fixedly installed in the limit groove 26 through a plurality of extrusion springs 31, and a driving mechanism is installed between the shearing blade 30 and the injection molding transverse tube 7;
The driving mechanism comprises a driving push rod 32 fixedly arranged on the pressurizing conical head 20, a driven push rod 22 matched with the driving push rod 32 is slidably arranged on the injection molding transverse tube 7, a lower push plate 27 matched with the driven push rod 22 is fixedly arranged at the lower part of the middle position shaft 28, an upper push rod 29 is fixedly arranged at the side part of the middle position shaft 28, a connecting shaft is rotatably arranged on the shearing knife 30, and one end, far away from the middle position shaft 28, of the upper push rod 29 is fixedly arranged on the connecting shaft;
The injection hole 14 is matched with the injection transverse pipe 7, and the molten injection material in the injection transverse pipe 7 is injected through the injection hole 14, and the shearing knife 30 is positioned in the injection hole 14 when the injection is not performed in the initial state, so that the injection hole 14 can be plugged, and the injection material is prevented from entering the positioning die 11 when the injection is not performed;
when the injection molding material is pressurized and pushed, the pressurizing conical head 20 moves to drive the driving push rod 32 on the pressurizing conical head to move, the driving push rod 32 moves to be in contact with the driven push rod 22 and push the driven push rod 22 to move, the driven push rod 22 moves to be in contact with the lower push plate 27, so that the lower push plate 27 is pushed to deflect by taking the middle position shaft 28 as an axis, the middle position shaft 28 is driven to rotate when the driven push rod 22 moves, the middle position shaft 28 drives the upper push rod 29 to deflect upwards when rotating, and the middle position shaft 28 is connected with the shearing blade 30 in a rotating way through a connecting shaft, so that the upper push rod 29 drives the shearing blade 30 to vertically move upwards when deflecting, and simultaneously a plurality of extrusion springs 31 are compressed;
When the shearing knife 30 moves vertically upwards, the shearing knife leaves the injection hole 14 and enters the limiting groove 26, namely the blocking of the injection hole 14 can be relieved, at the moment, injection materials can enter the injection hole 14 when being pushed under pressure and enter the positioning die 11, and automatic injection can be completed.
The limit sliding groove matched with the driven push rod 22 is formed in the injection molding transverse pipe 7, two closely attached rubber sealing strips are fixedly arranged on the inner wall of the limit sliding groove, and the two rubber sealing strips are matched with each other, so that the driven push rod 22 can normally move, the limit sliding groove can be blocked, and injection molding materials in the injection molding transverse pipe 7 are prevented from overflowing through the limit sliding groove.
Example IV
Referring to fig. 1 to 3 and fig. 8 to 13, the distinguishing technical scheme of the present embodiment compared with the third embodiment is as follows: the molding adjusting unit comprises a positioning assembly and a die cavity adjusting assembly, wherein the positioning assembly is used for carrying out combined positioning on an injection mold, and an injection mold cavity for molding an injection molding piece is arranged in the positioning assembly;
The positioning assembly comprises a hydraulic positioning rod 10 fixedly arranged on the shielding protective cover 2, a molding die 12 is fixedly arranged on the driving end of the hydraulic positioning rod 10, a molding die cavity 23 for molding injection molding pieces is arranged in the positioning die 11, and the molding die cavity 23 is communicated with the injection molding hole 14;
a plurality of positioning bolts 15 are fixedly arranged on the molding die 12, and a plurality of positioning holes 34 matched with the positioning bolts 15 are formed in the positioning die 11;
Before injection molding, the hydraulic positioning rod 10 is started to drive the molding die 12 to move and approach the inside of the positioning die 11, so that a plurality of positioning bolts 15 in the molding die 12 are clamped and inserted into a plurality of positioning holes 34 in the positioning die 11, and positioning and attaching of the molding die 12 and the positioning die 11 are completed.
In a further embodiment, the cavity adjustment assembly is used for adjusting the internal shape of the injection cavity to realize injection molding of injection molding pieces with various shapes, the cavity adjustment assembly comprises a molding box 24 fixedly mounted on the molding die 12, the molding box 24 is matched with the molding cavity 23, and the elastic soft template 16 is fixedly mounted on the molding box 24;
when the molding die 12 is attached and fixed with the positioning die 11, the molding box 24 is clamped into the molding die cavity 23;
The space between the elastic soft template 16 and the molding cavity 23 is an injection molding cavity for injection molding of injection molding pieces, a plurality of electric telescopic rods 25 are fixedly arranged in the molding box 24, and a molding extrusion roller 33 matched with the elastic soft template 16 is fixedly arranged at the driving end of each electric telescopic rod 25;
The plurality of electric telescopic rods 25 can be started to drive the plurality of molding extrusion rollers 33 to move and extrude the elastic soft templates 16 according to actual production requirements, so that the curved surface shape of the elastic soft templates 16 in the molding die cavity 23 can be changed, at the moment, the shape between the elastic soft templates 16 and the molding die cavity 23 is the injection die cavity of an injection molding part to be injection molded, and the shape of the elastic soft templates 16 can be quickly adjusted according to requirements, so that various injection molding parts with complex curved surface shapes can be injection molded;
The elastic soft template 16 is made of P20 steel material, and the P20 steel material is universal soft tool steel, has good heat resistance, flexibility and surface smoothness, can bear the high temperature of molten injection molding materials, has certain deformability, and enables the elastic soft template 16 to deform smoothly.
The plurality of electric telescopic rods 25 extrude the elastic soft templates 16 to apply a certain extrusion force to the injection molding materials in the injection molding cavity, so that the injection molding materials can be extruded and attached with the elastic soft templates 16 tightly, the integrity of the molded injection molding piece is improved, and the problems of unfilled corners and the like of the injection molding piece are avoided.
After the shape of the injection molding cavity is adjusted, the injection molding materials in the injection molding transverse pipe 7 can be injected into the injection molding cavity through the injection molding hole 14, after the injection molding is finished, the hydraulic pushing rod 18 can drive the pressurizing conical head 20 to move back, so that the driving pushing rod 32 is separated from the driven pushing rod 22, at the moment, the plurality of extrusion springs 31 can be automatically stretched to drive the shearing knife 30 to move back into the injection molding hole 14, the injection molding materials in the injection molding hole 14 can be cut off, the injection molding materials in the injection molding hole 14 are prevented from being connected with the injection molding materials in the injection molding cavity, the injection molding materials and the injection molding materials are prevented from being integrally formed, and the formed injection molding piece is easier to discharge;
When the shearing knife 30 moves downwards, the upper push rod 29 is driven to deflect downwards, so that the middle shaft 28 is driven to rotate, and the lower push plate 27 is driven to rotate and reset, so that the driven push rod 22 is driven to automatically return to the initial state, and further injection molding is facilitated.
The positioning die 11 is internally provided with a cooling system, and after injection molding and cutting-off of injection molding materials are completed, the control console 3 can control the cooling system to start cooling and cooling the injection molding materials in the injection molding die cavity, so that the injection molding materials in the injection molding die cavity are rapidly cooled and shaped.
Be provided with the discharge chute 8 that is used for the injection molding to unload on the machine tool 1, the injection molding cooling finalizes the design after, hydraulic pressure locating lever 10 can start to drive the shaping mould 12 and remove and make its and positioning die 11 separation, and the injection molding in the positioning die 11 can fall to the discharge chute 8 in the effect of gravity in this moment automatically, can accomplish the automatic collection of injection molding.
The embodiment of the invention also provides an injection molding method of the complex curved surface injection molding piece, which is used for the injection molding system and comprises the following steps:
S1, controlling an external feeding system to inject quantitative injection molding materials into a feeding and melting unit through a control console 3, conveying the injection molding materials by a feeding assembly in the feeding and melting unit, and heating and melting the injection molding materials by the melting assembly in the conveying process;
s2, controlling a positioning assembly and a die cavity adjusting assembly in a molding adjusting unit to start through a control console 3, enabling an injection molding die cavity to be molded through starting the positioning assembly, and adjusting the inner curved surface shape of the injection molding die cavity through the die cavity adjusting assembly, so that an injection molding die cavity with a complex curved surface is formed;
S3, controlling a pressurizing assembly in the injection pressurizing unit to start pressurizing the molten injection molding material through a control console 3, injecting the molten injection molding material into an injection molding cavity in the molding adjusting unit, and after the injection molding material in the injection molding cavity is cooled and solidified, finishing processing the injection molding piece;
S4, after the injection molding material is pressurized and injected, the shearing assembly synchronously starts to shear and block the rear part of the injection molding material, and the rear part of the injection molding piece is demolded before the injection molding material is not completely cooled;
S5, after the injection molding piece is cooled and molded, the control console 3 controls the positioning component to release the positioning of the injection molding piece, so that the injection molding piece automatically falls down to finish demolding and unloading.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (10)
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| CN202410785513.1A CN118493788A (en) | 2024-06-18 | 2024-06-18 | Injection molding system and method for complex curved surface injection molding part |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119261120A (en) * | 2024-12-11 | 2025-01-07 | 温岭市光森鞋业有限公司 | Safety shoe insole injection molding equipment |
| CN119682112A (en) * | 2025-02-21 | 2025-03-25 | 杭州凯美模具有限公司 | Injection mold and method for processing automobile headlight reflector |
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2024
- 2024-06-18 CN CN202410785513.1A patent/CN118493788A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119261120A (en) * | 2024-12-11 | 2025-01-07 | 温岭市光森鞋业有限公司 | Safety shoe insole injection molding equipment |
| CN119682112A (en) * | 2025-02-21 | 2025-03-25 | 杭州凯美模具有限公司 | Injection mold and method for processing automobile headlight reflector |
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