CN112109273A - BMC material injection molding process - Google Patents
BMC material injection molding process Download PDFInfo
- Publication number
- CN112109273A CN112109273A CN202010900863.XA CN202010900863A CN112109273A CN 112109273 A CN112109273 A CN 112109273A CN 202010900863 A CN202010900863 A CN 202010900863A CN 112109273 A CN112109273 A CN 112109273A
- Authority
- CN
- China
- Prior art keywords
- injection molding
- molding process
- mold
- raw materials
- machine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/10—Conditioning or physical treatment of the material to be shaped by grinding, e.g. by triturating; by sieving; by filtering
-
- 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
- B29C45/1753—Cleaning or purging, e.g. of the injection unit
-
- 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
- B29C45/1769—Handling of moulded articles or runners, e.g. sorting, stacking, grinding of runners
-
- 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
- B29C45/18—Feeding the material into the injection moulding apparatus, i.e. feeding the non-plastified material into the injection unit
-
- 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
- B29C45/64—Mould opening, closing or clamping devices
- B29C45/67—Mould opening, closing or clamping devices hydraulic
-
- 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
- B29C45/7207—Heating or cooling of the moulded articles
-
- 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
-
- 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
- B29C2045/0096—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor drying the moulding material before injection, e.g. by heating
-
- 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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/1418—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure
- B29C2045/14286—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure means for heating the insert
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention discloses a BMC material injection molding process, which comprises the following steps: preparing before molding, treating raw materials, cleaning a cylinder, preheating an insert and preparing a release agent; BMC injection, charging, plasticizing, injection, cooling and demolding; further cooling treatment; and (4) post-treatment of the product. The method has the beneficial effects that: this kind of BMC material injection moulding technology compares with traditional injection moulding technology, between BMC injection, the processing of raw materials has been carried out, realize surperficial the decontaminating, reduce inside impurity, holistic quality has been improved, the stoving operation has been carried out simultaneously, realize preheating of raw materials, for providing the intensification before moulding plastics, further still have broken structure, can carry out the broken handling of raw materials, be convenient for reduce the size of raw materials, thereby be convenient for heat up and melt, be convenient for mould plastics, the molding quality has been improved.
Description
Technical Field
The invention relates to an injection molding process, in particular to a BMC material injection molding process, and belongs to the technical field of BMC material injection molding application.
Background
BMC is bulk molding compound; BMC is a mould pressing intermediate material for manufacturing glass fiber reinforced thermosetting products by a semi-dry method, unsaturated polyester resin, low shrinkage/low profile additives, initiators, internal release agents, mineral fillers and the like are mixed into paste in advance, then thickeners, colorants and the like are added, the paste and glass fibers with different lengths are stirred in a special material kettle, and a thickening process is carried out, so that a bulk intermediate material is finally formed and can be used for mould pressing and injection molding.
The processing quality of the existing BMC material injection molding process may be insufficient, the raw material may lack a pretreatment process between injection molding, the raw material is easy to have a large amount of impurities therein and to be removed, and the raw material may lack preheating and is not easy to melt before entering an injection molding machine, which may affect the processing rate. Therefore, a BMC material injection molding process is proposed to address the above problems.
Disclosure of Invention
The present invention is directed to solving the above problems and providing a BMC material injection molding process.
The invention realizes the aim through the following technical scheme, and provides a BMC material injection molding process, which comprises the following steps:
(1) preparation before molding
a. The raw material is treated, the raw material is moved out of a warehouse and is loaded into a drum type cleaning machine to be poured, the drum type cleaning machine is started, the rotating speed of the drum type cleaning machine is kept between 800-ion 1000r/min, the water pressure of flushing water flow is controlled between 800-ion 1300MPA, the cleaning time is controlled between 30-40min, after cleaning, the machine is stopped for 10-14min, standing and draining are carried out, the raw material is further taken out manually, and high-temperature drying is carried out through a drying machine until the raw material is completely dried;
b. cleaning a machine barrel, manually checking and debugging the injection molding machine, and cleaning the machine barrel in the injection molding machine to discharge dirt;
c. preheating the insert and preparing a release agent, namely preheating the used insert, heating, selecting the release agent and preparing the release agent;
(2) BMC injection
a. Mounting a crushing device, namely mounting the crushing device on the top of a hopper of an injection molding machine;
b. feeding, namely feeding the raw materials treated in the step (1) into a hopper of an injection molding machine through a constant volume device or manual operation, and crushing the raw materials through a crushing device and then feeding the crushed raw materials into the hopper of the injection molding machine;
c. plasticizing, namely feeding the raw materials into a charging barrel of an injection molding machine, conveying the raw materials through a screw, and heating and melting the raw materials to form a plastic melt;
d. injecting, namely applying high pressure to a plunger or a screw from a metering position in a machine barrel through an injection oil cylinder and a piston, and quickly conveying a plasticized plastic melt into a closed die cavity through a nozzle at the front end of the machine barrel and a pouring system in a die;
e. cooling, after injection, introducing cooling media such as cooling water, oil or air into the mold to cool the mold, and blowing air to the whole mold by using an industrial fan outside during cooling;
f. demoulding, after the plastic part is cooled, opening the mould, separating the left mould from the right mould, and pushing the plastic part out of the mould under the action of a pushing mechanism;
(3) further cooling, namely placing the plastic part formed after demolding, blowing air to the surface by a fan, and further cooling to dissipate heat and reduce the temperature of the surface;
(4) and (3) post-processing of the product, namely annealing and humidifying the plastic product, trimming the periphery of the plastic product and removing burrs through a cutter.
Preferably, when the raw material is dried in the step (1), the drying temperature is controlled to be between 80 and 94 ℃, the drying time is controlled to be between 30 and 36min, and the raw material is turned over manually by a shovel tool while being dried until the raw material is completely dried.
Preferably, when the injection molding machine is inspected in the step (1), the number of inspectors is controlled to be 3-4, and two inspectors are combined to perform common inspection, and the inspected data is recorded and photographed.
Preferably, the release agent in the step (1) is coated on the mold, and the release agent is manually brushed on the surface of the mold by a brush.
Preferably, during the transportation of the raw material in the step (2), a heater on the injection molding machine is used for heating treatment, and the heating temperature is controlled to be between 135 ℃ and 185 ℃, so that the raw material is melted.
Preferably, during the injection in step (2), the mold for molding is in a mold closing device, the mold is installed on one side of the injection molding machine, and the mold is provided with a hydraulic system for driving the left mold and the right mold of the mold.
Preferably, the injection pressure of the injection molding machine in the step (2) is controlled to be between 94 and 152MPa, and the injection speed of the injection molding machine is controlled to be between 1.9 and 3.3 m/min.
Preferably, when cooling is performed in the step (2), the plastic melt in the mold and at the gate is frozen, the pressure of the injection molding machine is removed, and the cooling time is controlled within 30-40 min.
Preferably, when the plastic part is further cooled in the step (3), the plastic part is taken and placed by a clamp, and is placed in the bearing tray when the plastic part is integrally cooled.
Preferably, after the product is processed in the step (4), the product is manually transported by a transport vehicle, and meanwhile, the transport vehicle is covered with a covering cloth for shielding and is transferred to the next workshop for further processing.
The invention has the beneficial effects that: this kind of BMC material injection moulding technology compares with traditional injection moulding technology, between BMC injection, the processing of raw materials has been carried out, realize surperficial the decontaminating, reduce inside impurity, holistic quality has been improved, the stoving operation has been carried out simultaneously, realize preheating of raw materials, for providing the intensification before moulding plastics, further still have broken structure, can carry out the broken handling of raw materials, be convenient for reduce the size of raw materials, thereby be convenient for heat up and melt, be convenient for mould plastics, the molding quality has been improved.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
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, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
a BMC material injection molding process, the injection molding process comprising the steps of:
(1) preparation before molding
a. Processing raw materials, namely moving the raw materials out of a warehouse, loading the raw materials into a drum-type cleaning machine, pouring the raw materials into the drum-type cleaning machine, starting the drum-type cleaning machine, keeping the rotating speed of the drum-type cleaning machine at 1000r/min, controlling the water pressure of flushing water flow at 1300MPA, controlling the cleaning time at 40min, stopping the machine for 14min after cleaning, standing for draining, further manually taking out the raw materials, and drying the raw materials at high temperature by a drying machine until the raw materials are completely dried;
b. cleaning a machine barrel, manually checking and debugging the injection molding machine, and cleaning the machine barrel in the injection molding machine to discharge dirt;
c. preheating the insert and preparing a release agent, namely preheating the used insert, heating, selecting the release agent and preparing the release agent;
(2) BMC injection
a. Mounting a crushing device, namely mounting the crushing device on the top of a hopper of an injection molding machine;
b. feeding, namely feeding the raw materials treated in the step (1) into a hopper of an injection molding machine by manual operation, and crushing the raw materials by a crushing device and then feeding the crushed raw materials into the hopper of the injection molding machine;
c. plasticizing, namely feeding the raw materials into a charging barrel of an injection molding machine, conveying the raw materials through a screw, and heating and melting the raw materials to form a plastic melt;
d. injecting, namely applying high pressure to a plunger or a screw from a metering position in a machine barrel through an injection oil cylinder and a piston, and quickly conveying a plasticized plastic melt into a closed die cavity through a nozzle at the front end of the machine barrel and a pouring system in a die;
e. cooling, after injection, introducing cooling media such as cooling water, oil or air into the mold to cool the mold, and blowing air to the whole mold by using an industrial fan outside during cooling;
f. demoulding, after the plastic part is cooled, opening the mould, separating the left mould from the right mould, and pushing the plastic part out of the mould under the action of a pushing mechanism;
(3) further cooling, namely placing the plastic part formed after demolding, blowing air to the surface by a fan, and further cooling to dissipate heat and reduce the temperature of the surface;
(4) and (3) post-processing of the product, namely annealing and humidifying the plastic product, trimming the periphery of the plastic product and removing burrs through a cutter.
Further, when the raw material is dried in the step (1), the drying temperature is controlled at 94 ℃, the drying time is controlled at 36min, and the raw material is turned over manually by a shovel tool while being dried until the raw material is completely dried.
Further, when the injection molding machine is inspected in the step (1), the number of inspectors is controlled to be 3-4 persons, two persons are in a group during each inspection, common inspection is carried out, and the inspected data is recorded and photographed.
Further, the release agent in the step (1) is coated on the mold, and the release agent is manually brushed on the surface of the mold by a brush.
Further, in the process of conveying the raw materials in the step (2), a heater on the injection molding machine is used for heating, and the heating temperature is controlled at 185 ℃, so that the raw materials are melted.
Further, in the injection process in the step (2), a mold for molding is arranged in a mold closing device, the mold is installed on one side of the injection molding machine, and a hydraulic system is arranged on the mold and used for driving the left mold and the right mold of the mold.
Further, the injection pressure of the injection molding machine in the step (2) is controlled at 152MPa, and the injection speed of the injection molding machine is controlled at 3.3 m/min.
Further, when cooling is carried out in the step (2), the plastic melt in the mold and at the sprue is frozen, the pressure of the injection molding machine is removed, and the cooling time is controlled to be 40 min.
Further, when the plastic part is further cooled in the step (3), the plastic part is taken and placed by the clamp, and meanwhile, when the plastic part is integrally cooled, the plastic part is placed in the bearing plate.
Further, after the product is processed in the step (4), the product is manually transported by a transfer vehicle, and meanwhile, the transfer vehicle is covered with a shielding cloth for shielding and is transferred to the next workshop for further processing.
The injection molding process is suitable for the processing requirement of low yield, manual operation is mostly adopted, and the overall cost is low.
Example two:
a BMC material injection molding process, the injection molding process comprising the steps of:
(1) preparation before molding
a. The raw material is treated, the raw material is taken out of a warehouse and is loaded into a drum type cleaning machine to be poured, the drum type cleaning machine is started, the rotating speed of the drum type cleaning machine is kept at 800r/min, the water pressure of flushing water flow is controlled at 800MPA, the cleaning time is controlled at 30min, the machine is stopped for 10min after cleaning, standing and draining are carried out, the raw material is further taken out manually, and high-temperature drying is carried out through a drying machine until the raw material is completely dried;
b. cleaning a machine barrel, manually checking and debugging the injection molding machine, and cleaning the machine barrel in the injection molding machine to discharge dirt;
c. preheating the insert and preparing a release agent, namely preheating the used insert, heating, selecting the release agent and preparing the release agent;
(2) BMC injection
a. Mounting a crushing device, namely mounting the crushing device on the top of a hopper of an injection molding machine;
b. feeding, namely feeding the raw materials treated in the step (1) into a hopper of an injection molding machine through a constant volume device, and crushing the raw materials through a crushing device and then feeding the crushed raw materials into the hopper of the injection molding machine;
c. plasticizing, namely feeding the raw materials into a charging barrel of an injection molding machine, conveying the raw materials through a screw, and heating and melting the raw materials to form a plastic melt;
d. injecting, namely applying high pressure to a plunger or a screw from a metering position in a machine barrel through an injection oil cylinder and a piston, and quickly conveying a plasticized plastic melt into a closed die cavity through a nozzle at the front end of the machine barrel and a pouring system in a die;
e. cooling, after injection, introducing cooling media such as cooling water, oil or air into the mold to cool the mold, and blowing air to the whole mold by using an industrial fan outside during cooling;
f. demoulding, after the plastic part is cooled, opening the mould, separating the left mould from the right mould, and pushing the plastic part out of the mould under the action of a pushing mechanism;
(3) further cooling, namely placing the plastic part formed after demolding, blowing air to the surface by a fan, and further cooling to dissipate heat and reduce the temperature of the surface;
(4) and (3) post-processing of the product, namely annealing and humidifying the plastic product, trimming the periphery of the plastic product and removing burrs through a cutter.
Further, when the raw material is dried in the step (1), the drying temperature is controlled at 80 ℃, the drying time is controlled at 30min, and the raw material is turned over manually by a shovel tool while being dried until the raw material is completely dried.
Further, when the injection molding machine is inspected in the step (1), the number of inspectors is controlled to be 3, two inspectors are combined to perform common inspection each time, and the inspected data is recorded and photographed.
Further, the release agent in the step (1) is coated on the mold, and the release agent is manually brushed on the surface of the mold by a brush.
Further, in the process of conveying the raw materials in the step (2), a heater on an injection molding machine is used for heating, and the heating temperature is controlled at 135 ℃ so that the raw materials are melted.
Further, in the injection process in the step (2), a mold for molding is arranged in a mold closing device, the mold is installed on one side of the injection molding machine, and a hydraulic system is arranged on the mold and used for driving the left mold and the right mold of the mold.
Further, the injection pressure of the injection molding machine in the step (2) is controlled at 94MPa, and the injection speed of the injection molding machine is controlled at 1.9 m/min.
Further, when cooling is carried out in the step (2), the plastic melt in the mold and at the sprue is frozen, the pressure of the injection molding machine is removed, and the cooling time is controlled to be 30 min.
Further, when the plastic part is further cooled in the step (3), the plastic part is taken and placed by the clamp, and meanwhile, when the plastic part is integrally cooled, the plastic part is placed in the bearing plate.
Further, after the product is processed in the step (4), the product is manually transported by a transfer vehicle, and meanwhile, the transfer vehicle is covered with a shielding cloth for shielding and is transferred to the next workshop for further processing.
The injection molding process is suitable for the processing requirement of large output, and the machine is mostly adopted to replace the manual work for operation, so that the overall efficiency is high.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A BMC material injection molding process is characterized in that: the injection molding process comprises the following steps:
(1) preparation before molding
a. The raw material is treated, the raw material is moved out of a warehouse and is loaded into a drum type cleaning machine to be poured, the drum type cleaning machine is started, the rotating speed of the drum type cleaning machine is kept between 800-ion 1000r/min, the water pressure of flushing water flow is controlled between 800-ion 1300MPA, the cleaning time is controlled between 30-40min, after cleaning, the machine is stopped for 10-14min, standing and draining are carried out, the raw material is further taken out manually, and high-temperature drying is carried out through a drying machine until the raw material is completely dried;
b. cleaning a machine barrel, manually checking and debugging the injection molding machine, and cleaning the machine barrel in the injection molding machine to discharge dirt;
c. preheating the insert and preparing a release agent, namely preheating the used insert, heating, selecting the release agent and preparing the release agent;
(2) BMC injection
a. Mounting a crushing device, namely mounting the crushing device on the top of a hopper of an injection molding machine;
b. feeding, namely feeding the raw materials treated in the step (1) into a hopper of an injection molding machine through a constant volume device or manual operation, and crushing the raw materials through a crushing device and then feeding the crushed raw materials into the hopper of the injection molding machine;
c. plasticizing, namely feeding the raw materials into a charging barrel of an injection molding machine, conveying the raw materials through a screw, and heating and melting the raw materials to form a plastic melt;
d. injecting, namely applying high pressure to a plunger or a screw from a metering position in a machine barrel through an injection oil cylinder and a piston, and quickly conveying a plasticized plastic melt into a closed die cavity through a nozzle at the front end of the machine barrel and a pouring system in a die;
e. cooling, after injection, introducing cooling media such as cooling water, oil or air into the mold to cool the mold, and blowing air to the whole mold by using an industrial fan outside during cooling;
f. demoulding, after the plastic part is cooled, opening the mould, separating the left mould from the right mould, and pushing the plastic part out of the mould under the action of a pushing mechanism;
(3) further cooling, namely placing the plastic part formed after demolding, blowing air to the surface by a fan, and further cooling to dissipate heat and reduce the temperature of the surface;
(4) and (3) post-processing of the product, namely annealing and humidifying the plastic product, trimming the periphery of the plastic product and removing burrs through a cutter.
2. The injection molding process of a BMC material of claim 1, wherein the injection molding process comprises: when the raw material is dried in the step (1), the drying temperature is controlled to be between 80 and 94 ℃, the drying time is controlled to be between 30 and 36min, and the raw material is turned over manually by a spade tool while being dried until the raw material is completely dried.
3. The injection molding process of a BMC material of claim 1, wherein the injection molding process comprises: when the injection molding machine is inspected in the step (1), the number of inspectors is controlled between 3 and 4, two inspectors are combined to perform common inspection in each inspection, and the inspected data is recorded and photographed.
4. The injection molding process of a BMC material of claim 1, wherein the injection molding process comprises: and (2) coating the release agent in the step (1) on a mold, and manually brushing the release agent on the surface of the mold by a brush.
5. The injection molding process of a BMC material of claim 1, wherein the injection molding process comprises: and (3) in the process of conveying the raw materials in the step (2), heating the raw materials by a heater on an injection molding machine, wherein the heating temperature is controlled to be between 135 ℃ and 185 ℃, so that the raw materials are melted.
6. The injection molding process of a BMC material of claim 1, wherein the injection molding process comprises: in the injection process in the step (2), a mold for molding is arranged in a mold closing device, the mold is arranged on one side of an injection molding machine, and a hydraulic system is arranged on the mold and used for driving a left mold and a right mold of the mold.
7. The injection molding process of a BMC material of claim 1, wherein the injection molding process comprises: and (3) controlling the injection pressure of the injection molding machine in the step (2) to be 94-152MPa, and controlling the injection speed of the injection molding machine to be 1.9-3.3 m/min.
8. The injection molding process of a BMC material of claim 1, wherein the injection molding process comprises: and (3) when cooling is carried out in the step (2), freezing the plastic melt in the mold and at the sprue, removing the pressure of the injection molding machine, and controlling the cooling time to be 30-40 min.
9. The injection molding process of a BMC material of claim 1, wherein the injection molding process comprises: and (4) when the plastic part is further cooled in the step (3), taking and placing the plastic part, clamping by using the clamp, and simultaneously, when the plastic part is integrally cooled, placing the plastic part in the bearing plate.
10. The injection molding process of a BMC material of claim 1, wherein the injection molding process comprises: and (4) after the product is processed in the step (4), manually transporting the product through a transfer vehicle, covering a piece of shielding cloth on the transfer vehicle for shielding, and transferring the product to the next workshop for further processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010900863.XA CN112109273A (en) | 2020-09-01 | 2020-09-01 | BMC material injection molding process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010900863.XA CN112109273A (en) | 2020-09-01 | 2020-09-01 | BMC material injection molding process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112109273A true CN112109273A (en) | 2020-12-22 |
Family
ID=73805081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010900863.XA Pending CN112109273A (en) | 2020-09-01 | 2020-09-01 | BMC material injection molding process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112109273A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011183612A (en) * | 2010-03-05 | 2011-09-22 | Denso Corp | Resin molding method using a plurality of molds |
| CN203221593U (en) * | 2013-04-28 | 2013-10-02 | 龙岩大乘塑胶有限公司 | Plastic granulator for complete processing |
| CN104139485A (en) * | 2014-07-01 | 2014-11-12 | 江苏海纬集团有限公司 | Process for manufacturing bottom box of threading box |
| CN105365173A (en) * | 2015-12-11 | 2016-03-02 | 滁州市博康模具塑料有限公司 | Quick thermoplastic forming process |
| CN110524829A (en) * | 2019-08-19 | 2019-12-03 | 湖北丰凯机械有限公司 | A kind of fan spacer block manufacturing process |
-
2020
- 2020-09-01 CN CN202010900863.XA patent/CN112109273A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011183612A (en) * | 2010-03-05 | 2011-09-22 | Denso Corp | Resin molding method using a plurality of molds |
| CN203221593U (en) * | 2013-04-28 | 2013-10-02 | 龙岩大乘塑胶有限公司 | Plastic granulator for complete processing |
| CN104139485A (en) * | 2014-07-01 | 2014-11-12 | 江苏海纬集团有限公司 | Process for manufacturing bottom box of threading box |
| CN105365173A (en) * | 2015-12-11 | 2016-03-02 | 滁州市博康模具塑料有限公司 | Quick thermoplastic forming process |
| CN110524829A (en) * | 2019-08-19 | 2019-12-03 | 湖北丰凯机械有限公司 | A kind of fan spacer block manufacturing process |
Non-Patent Citations (1)
| Title |
|---|
| 娄春华: "《高分子科学导论》", 31 March 2019 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103612361B (en) | Injection molding process | |
| CN206748981U (en) | A kind of quick injection molding mould | |
| CN102294780A (en) | Injection molding system and injection molding method | |
| CN114311493A (en) | Injection mold for processing electronic plastic element and injection method thereof | |
| CN109664460A (en) | A kind of injection molding process of precise injection mould | |
| CN111761797A (en) | Injection molding device for processing thermoplastic plastic products | |
| US4309379A (en) | Method and apparatus for runnerless injection-compression molding thermosetting materials | |
| CN110561704A (en) | Double-injection molding process of plastic product | |
| CN113021752B (en) | Injection molding machine with cooling device | |
| CN112109273A (en) | BMC material injection molding process | |
| CN219686433U (en) | Injection mold capable of rapidly demolding | |
| CN219486472U (en) | Injection molding excess material recycling structure for injection molding machine | |
| CA2792890C (en) | Mold assembly with integrated melting device | |
| CN209903777U (en) | Special charging equipment of injection molding machine | |
| CN111055426A (en) | Injection molding process of PP drawer | |
| CN212400236U (en) | Injection molding machine with quick drawing of patterns | |
| CN114536587A (en) | Injection molding equipment for plastic part forming and processing and material conveying structure thereof | |
| CN210705719U (en) | Material feeding device of injection molding machine | |
| CN204278424U (en) | A kind of Preplasticizing injection moulding apparatus | |
| CN111531826A (en) | Injection molding process of automobile fan | |
| CN106626236A (en) | Intelligent mold changing method of plastic injection machine | |
| CN220075480U (en) | Packing box forming device | |
| CN205343728U (en) | Driving valve and plastics extruder who uses thereof | |
| US2980962A (en) | Method for automatic molding | |
| CN218640196U (en) | Car back row middle sleeve pillow injection mold with cooling function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201222 |
|
| RJ01 | Rejection of invention patent application after publication |