The box opener is a fully automatic equipment which automatically operates the carton, converts the bottom of the carton according to a certain procedure, and seals it with adhesive tape and transmits it to the packing machine through the conveyor belt. The machine has a high degree of automation and simple operation, and can automatically complete a series of work, such as box picking, forming, folding cover, bottom sealing and so on. It has developed rapidly in the packaging machinery industry. The workload of operators and the number of operators are reduced. At the same time, the occupation space of machinery is reduced, and the cost of purchasing other auxiliary machinery is saved. Save the cost of workers and improve the production efficiency of enterprises. Learn more about automatic box opener Shanghai trek intelligent equipment
What is a plastic injection molding machine? What is it used for? What is the finished product?
Plastic injection molding machine is used for injection molding machines, a wide range of products, such as the general NOTEBOOK,LCD frame, mobile phone case, TV case and so on, almost all plastic parts are made in this way.
The following is the working principle of the injection molding machine and the injection molding process:
1. The working principle of injection molding machine
The working principle of the injection molding machine is similar to that of the syringe for injection. With the help of the thrust of the screw (or plunger), the plastic which has been plasticized and melted (that is, viscous flow) is injected into the closed mold cavity, and the product is obtained after curing and shaping.
Injection molding is a cyclic process, and each cycle mainly includes: quantitative feeding-melt plasticizing-pressure injection-filling cooling-opening and taking parts. Take out the plastic part and then close the mold for the next cycle.
2. The structure of injection molding machine.
According to the plasticizing mode, the injection molding machine is divided into plunger injection molding machine and screw injection molding machine. According to the transmission mode of the machine, it can be divided into hydraulic type, mechanical type and hydraulic-mechanical (connecting rod) type, and it is divided into automatic, semi-automatic and manual injection molding machine according to the mode of operation.
(1) horizontal injection molding machine: this is the most common type. The mold closing part and the injection part are on the same horizontal centerline, and the mold is opened along the horizontal direction. Its features are: the fuselage is short, easy to operate and maintain; the center of gravity of the machine is low, and the installation is stable; after the product is ejected, the product can be automatically dropped by gravity, so it is easy to realize automatic operation. At present, this type of injection molding machine is mostly used in the market.
(2) Vertical injection molding machine: the mold closing part and the injection part are on the same vertical centerline, and the mold is opened along the vertical direction. Therefore, the utility model has the advantages of small area, easy placement of inserts, convenient loading and unloading of moulds, and the materials falling into the hopper can be plasticized more evenly. However, after the product is ejected, it is not easy to drop automatically, it must be removed by hand, and it is not easy to realize automatic operation. Vertical injection molding machine is suitable for small injection molding machine, generally less than 60 grams of injection molding machine is more, large, medium-sized machine is not suitable.
(3) Angle injection molding machine: its injection direction and mold interface are on the same surface, so it is especially suitable for flat products where gate marks are not allowed in the machining center. It covers an area smaller than the horizontal injection molding machine, but the inserts put into the mold are easy to fall. This type of injection molding machine is suitable for small machines.
(4) Multi-mold turntable injection molding machine: it is a special injection molding machine with multi-station operation, which is characterized by the turntable structure of the mold closing device and the rotation of the mold around the rotating shaft. This type of injection molding machine gives full play to the plasticizing ability of the injection device, which can shorten the production cycle and improve the production capacity of the machine. therefore, it is especially suitable for the production of mass products with long cooling setting time or more auxiliary time due to the placement of inserts. However, because the mold closing system is huge and complex, and the mold closing force of the mold closing device is often small, this kind of injection molding machine is widely used in the production of plastic soles and other products.
The general injection molding machine includes injection device, mold closing device, hydraulic system and electrical control system and so on.
The basic requirements of injection molding are plasticizing, injection and molding. Plasticizing is the premise of realizing and ensuring the quality of molded products, and in order to meet the requirements of molding, injection must have sufficient pressure and speed. At the same time, due to the high injection pressure, there is a high pressure in the mold cavity (the average pressure in the mold cavity is generally between 20~45MPa), so there must be enough mold closing force. Thus it can be seen that the injection device and mold closing device are the key components of the injection molding machine.
3. Operation of injection molding machine
3.1 Action procedure of injection molding machine
Mold closing → pre-molded → inverted → nozzle forward → injection → packing → nozzle back → cooling → opening → ejection → door → take workpiece → close → closing mold.
3.2 injection molding machine operation items: injection molding machine operation items include control keyboard operation, electrical control cabinet operation and hydraulic system operation. Select the injection process, feeding action, injection pressure, injection speed and ejection form, monitor the temperature, current and voltage of each section of the barrel, adjust the injection pressure and back pressure, and so on.
3.2.1 Action selection in injection process
The general injection molding machine can be operated either manually or semi-automatically or fully automatically.
Manual operation is in a production cycle, each action is realized by the operator toggling the operation switch. Generally, it is only selected when testing the machine to adjust the mold.
In semi-automatic operation, the machine can automatically complete the action of a work cycle, but after each production cycle, the operator must open the safety door, remove the workpiece, and then close the safety door, so that the machine can continue the next cycle of production.
When fully automatic operation, the injection molding machine can automatically enter the next working cycle after completing the action of one working cycle. In the normal continuous working process, there is no need to stop the machine for control and adjustment. However, it should be noted that if fully automatic work is required, (1) do not open the safety door halfway, otherwise the automatic operation will be interrupted; (2) the material should be fed in time; (3) if you choose the electric eye sensor, you should be careful not to close the electric eye.
In fact, it is usually necessary to stop temporarily in the fully automatic operation, such as spraying release agent to the machine mold and so on.
In normal production, semi-automatic or fully automatic operation is generally selected. At the beginning of the operation, the mode of operation (manual, semi-automatic or fully automatic) should be selected according to the needs of production, and the manual, semi-automatic or fully automatic switch should be switched accordingly.
The semi-automatic and fully automatic working procedure has been determined by the circuit itself. the operator only needs to change the speed and pressure, the length of time, the number of thimbles and so on on the cabinet surface, so that the working procedure will not be confused by the operator adjusting the wrong button.
Before each action is adjusted properly in a cycle, manual operation should be selected first, and after confirming that each action is normal, semi-automatic or fully automatic operation should be selected.
3.2.2 selection of premolded action
According to whether the injection seat retreats before and after pre-plastic feeding, that is, whether the nozzle leaves the mold, the injection molding machine generally has three options.
(1) fixed feeding: the nozzles are always affixed to the mold before and after premolding, and the injection seat does not move.
(2) pre-feeding: the nozzle carries on the pre-plastic feeding against the mold, the pre-molding is finished, the injection seat retreats, and the nozzle leaves the mold. The purpose of choosing this method is to use the injection hole of the mold against the nozzle during premolding, so as to prevent the melt from flowing out of the nozzle when the back pressure is high, and after premolding, the heat transfer between the nozzle and the mold can be avoided for a long time, which affects the relative stability of their respective temperature.
(3) Post-feeding: after the injection is completed, the injection seat retreats, the nozzle leaves the mold and then premolded, and the injection seat moves forward after premolding. This action is suitable for processing plastics with very narrow molding temperature, because the contact time between the nozzle and the mold is short, the heat loss is avoided and the solidification of the melt in the nozzle hole is avoided.
After the injection is over and the cooling timer is finished, the premolding action begins. The screw rotates to squeeze the plastic melt to the front of the screw head. Due to the function of the one-way valve at the front end of the screw, the molten plastic is accumulated at the front end of the barrel, forcing the screw back. When the screw retreats to a predetermined position (this position is determined by the stroke switch to control the distance of the screw retreat to achieve quantitative feeding), the premolding stops and the screw stops rotating. This is followed by the retractive action, that is, the screw makes a small amount of axial retreat, which can relieve the pressure of the molten material gathered at the nozzle and overcome the “salivation” phenomenon caused by the imbalance of pressure inside and outside the barrel. If there is no need for retraction, it should be stopped and the switch should be set to the appropriate position to allow the premolding to stop. At the same time when the switch is pressed, the reverse stop switch is also pressed. When the screw retracts back to the pressure stop switch, the reversal stops. Then the betting seats began to fall back. When the injection seat retreats to the pressure stop switch, the injection seat stops retreating. If the fixed feeding mode is adopted, attention should be paid to adjusting the position of the stroke switch.
In general, fixed feeding is adopted in general production to save the injection seat advance and retreat operation time and speed up the production cycle.
The technological process of plastic products (simply described)
Technological process of plastic products
1. Preparation before molding
(a) preheating and drying of the granule family: if the grain family is damp, it should be dried.
B, insert preheating: in order to reduce the cooling shrinkage gap between metal and plastic, larger metal inserts should be preheated in advance.
C, barrel cleaning: it is necessary to clean the cylinder when changing the product or changing the raw material.
2. Injection molding process feeding-plasticizing-injection-pressure-holding-cooling-opening and taking parts
A. feeding: the quantity of each feeding should be maintained to ensure the uniformity of plasticization.
B. Plasticizing: the granule is heated in the tube to reach the melting state.
C. Injection: the injection molding machine uses a screw to inject the molten plastic into the mold cavity
D, holding pressure: keep the pressure on the melting for a certain period of time after filling the mold
E, cooling: keep cooling in the mold cavity for a certain period of time
F, open the mold to pick up the parts: open the mold and take out the product.
3. Post-processing of plastic parts: post-processing of plastic parts:
A, remove the flying edge, material handle.
B, inspection, packing.
Surface requirements of plastic products class 121.What do you mean?
Production technology and application of plastic mould 1. Plastic container injection machine with rapid mold replacement device 2. Steel alloy Plastic molding moulds and ductile quenched blanks for plastic molding moulds 3, multi-purpose plastic co-extrusion composite pipe moulds 4, a core foamed plastic pipe, production process and special moulds 5, plastic shoe last primary forming process and mould manufacturing 6, fiber reinforced plastic products forming method and mould 7, method and device for adding labels in plastic blow molding machine moulds, Integral centrifugal pump housing with plastic lining, compression mold and compression process 9, plastic mold steel 10, manufacturing method of long-life resin mold for plastic injection 11, easy-to-cut high toughness plastic mold steel 12, equipment for accurately and quickly opening and closing blow molding machine mold of thermoplastic hollow body, mold closing device 14for products made from thermoplastic, Semi-mold locking device of blow molding machine for blowing thermoplastic hollow body 15, forming process of fluoroplastic mold 16, combined plastic mold 17, thermal bonding process and mold 18 of plastic strip and fabric, combination of plastic camp and sealing body and manufacturing method and mould 19, forming method of plastic hollow part with flange and mould and device 20, manufacturing process of plastic pattern mold and its products 21, Fluoroplastic bellows processing method and products and special moulds 22, new methods for manufacturing plastic molding moulds 23, methods for producing double-wall reinforced plastic pipes and moulds 24, manufacturing methods for plastic optical total reflector moulds 25, manufacturing methods for plastic optical total reflector moulds and fixtures 26, plastic mold manufacturing methods 27, production methods for porous plastic moulds and moulds for implementing the method 28, Mold closing device for articles made of thermoplastics 29, mold closing device 30 for plastic processing machine, thermosetting plastic stamp manufacturing method and mould 31, low alloy steel 32 for manufacturing plastic and rubber moulds, aluminum profile, plastic profile mold ultra-thick restoration processing process 33, plastic mold made of iron-based alloy 34, method and device for closing plastic processing mechanical mold 35, Weldable mending steel for manufacturing plastic moulds 36, steel 37 mainly used for manufacturing molds for injection plastics, semiconductor devices encapsulated in plastic packages and metal moulds for producing them 38, low alloy steels for manufacturing plastic moulds 39, application methods of microporous materials in plastic moulds 40, plastic molds and forming methods thereof, molds and forming devices 41, Plastic injection mold 42 with melt transfer bushing between runner plates, plastic injection mold 43 with melt distribution bushing, manufacturing method 44 of microalloyed plastic mold steel, composite plastic pipe and production mold and process method 45, injection method of plastic and air injection head 46 for injection mold, mold 47 for plastic injection mold, plastic mold base steel and manufacturing method 48, Rubber plastic mold microporous exhaust plug 49, injection molding method and mold 50 for plastic material components on packaging sheet, plastic hot adhesive coil and manufacturing method and mold 51, plastic optical total reflector mold manufacturing method 52, auxiliary injection device 53 for manufacturing plastic parts with at least two components, plastic extrusion series setting sleeve mold and manufacturing method 54, A device for conveying the molten plastic extrudate discharged from the mold to the discharge channel 55, a mold for the main body of the plastic faucet 56, a stainless plastic mold steel 57, a steel for a plastic molding mold and its heat treatment method 58, a production process of a non-slip plastic film and a special mold thereof, a mold 60 for a plastic outer shell, a pipe molding device 61 with contact and air cooling plastic in the mold channel, Phenolic fiber reinforced plastic molding produces corrosion resistant water ring vacuum pump 62, mold opening sequence controller 63 with adjustable opening force for plastic mold, hollow molding mold 64 for in-mold labeling plastic products, mould 65 for plastic products, production method and mold 66 of plastic profiles coextruded with different plastic materials, roll molding method and special mould for large plastic products, Bainite quenching method of plastic mold steel 68, production method of plastic reflector mold 69, foam block mold gasket 70, manufacturing method of plastic injection mold with vehicle bumper covering system 71, excellent mechanical processability of plastic injection mold steel 72, plastic injection-pressing composite molding process and mould 73, mold for forming head member of deformable tubular plastic container 74, Integrated flanged plastic pipe and its processing mold and method for manufacturing the pipe 75, mold and method for manufacturing plastic products 76, especially check valve 77 for mold for plastic molding machine, steel mold 78 for steel and plastic materials, plastic foldable container and manufacturing method and mold 79, an one-time molding hollow plastic product grading blowing method and blowing mold 80, new type corrosion resistance, Preparation and production method of wear-resistant plastic mold steel 4Cr16Mo and mirror large module 81, in-mold decorative plastic parts which can be completed by ordinary injection mold and manufacturing method thereof 82, moulds for molding products of directly injected and blown plastic hollow containers, plastic products and moulds thereof and applicable products 84, machine tools for manufacturing plastic containers with linear motors for moving mold support units, Method for blowing bottle in ring mold of plastic infusion bottle and mould 86, bainitic large cross-section plastic die steel and manufacturing method thereof 87, a shrinking inner core-pulling device for plastic mold and its use method 88, a rapid plastic mold water-soluble cooling channel forming process 89, a hydraulic ejection device for metal resin composite plastic mold demoulding, A release agent composition for a plastic mold and a component 91 using the composition, a mold for foaming, a manufacturing method of ethyl carbamate foam and an ethyl carbamate foam 92, an anti-overflow plastic packaging mold 93, a steel for plastic forming mold 94, a mold for manufacturing a plastic plate and a method for manufacturing a plastic plate, a locally adjustable plastic mold 96, A mold 97 for producing a plurality of multicolor plastic packing belts, a corrosion resistant and easy-cutting plastic mold steel 98, a plastic faucet and its production process and mold 99, a method for realizing uniform heating and cooling of plastic injection moulds 100, molded plastic lens 101, a thermosetting plastic injection molding method and mold 102, forging mold modified nylon plastic guide sleeve 103, Forming method of forming die and forming device thereof, manufacturing method of plastic lens and manufacturing device 104, die positioning method and die 105 of plastic extrusion die, steel for plastic forming die and heat treatment method 106 thereof, mold unit and method for manufacturing plastic edge glass shelf 107, method for producing multi-specification plastic pipe with fixed diameter die and die die 108, A forming mold 109 of a spiral plastic rattan, a high pressure molding machine mold 110 for processing a mirror ink plastic film on a mobile phone, an ultra-thick non-quenched and tempered plastic mold steel and a manufacturing method 111 thereof, a temperature control device 112 for rapid heating and cooling of a plastic mold, a hot pressing mold 113 for welding a plastic handbag handle, a plastic injection molding mold and a plastic injection molding method 114, A mold for plastic injection molding and a plastic injection molding method 115, a microfluidic plastic chip injection mold 116, an inner flow channel core-pulling mold 117 of the plastic pump shell of a centrifugal pump, a cross internal heating multi-gate hot runner 118 of the plastic injection mold, a combined mold 119 for curing the plastic chip, used for manufacturing the pneumatic thermoforming mold for plastic utensils with anti-scalding bowl feet, Die 121 for forming plastic optical fiber by co-extrusion, 122 for hot pressing plastic pipe, integral centrifugal pump shell with plastic lining and its pressing die 123, combined plastic die 124, plastic sheet bending die 125, two-color plastic extrusion die 126, automatic coating plastic film extrusion die 127, biological slice plastic embedding agent molding die 128, Blow pressing die 129 for plastic hollow parts with flanges, plastic profile extrusion mold 130, stamping plastic diaphragm forming die 131, plastic special-shaped pipe model 132, plastic injection mold hot runner device 133, mine anchor plastic shell expansion die 134, an extrusion mold 135 for processing plastic products, injection mold 136 for transparent plastic door curtain beads, plastic wire extrusion die 137, Plastic bag sealing and cutting machine punching die 138, plastic pipe flaring die 139, integral thermosetting plastic impeller and its manufacturing mold 140, plastic zipper ejector molding mold 141, plastic chemical barrel hollow molding mold 142, a special mold for manufacturing plastic pipe connections containing resistance wires, a new plastic injection mold 144, a plastic profile 145which is easy to be molded in the mold and easy to assemble, An improved plastic injection mold 146, a mold 147 for making plastic pipe flange joints, a mold safety sensing device 148 for a plastic injection molding machine, a pressing roller device for casting a microporous mold for casting plastic film, an improved plastic molding mold 150, a molding mold for making artificial leather plastic hard plates, a plastic extrusion mold 152 for direct preheating of the core mold, a plastic film forming mold 153, Plastic extrusion die 154 equipped with pattern making device, plastic packaging bag one-time molding die 155, plastic zipper die injection length adjustment device 156, plastic mold with multiple injection pieces 157, plastic mold hot runner heater 158, plastic plate production die 159 for rapid clamping by locking positioning pliers, positioning device 160 for plastic inner cavity trimming and punching die, special ventilation device 161for plastic mold, The utility model relates to a special mold 162 for making composite plastic plates, a plastic extrusion mold with a temperate zone 163, a controllable multi-cavity plastic pipe die 164, a double-layer plastic pipe extrusion die 165, a rubber plastic mold microporous exhaust plug 166, a flexible interface plastic pipe integral injection molding mold core (3) 167, a flexible interface plastic pipe integral injection molding mold core (2) 168, Flexible interface plastic pipe integral injection molding mold core (1) 169, plastic seedling tray composite mold 170, mold device 171 for manufacturing steel mesh skeleton reinforced composite plastic pipe, needle structure 172 for manufacturing plastic reflector mold, horizontal molding machine plastic foam mold 173, plastic drainage pipe mold 174 with reinforcement, mold ejection mechanism 175 for making plastic hook, plastic extrusion series setting sleeve mold 176, Plastic injection mold device 177 for reducing molding stress, 178 plastic boxed mold for concrete board of impervious canal, 179 plastic box lighting candle mold, 180 plastic mesh plate punching die, 181 core demoulding plastic ball valve mold, 182 core demoulding plastic ball valve mold, two-color co-extrusion plastic profile mold 183, a rear co-extrusion die 184 for making plastic door and window profile sealing strips, a plastic pipe extrusion mold 185, The plastic sheet shell forming die structure 186, the plastic sheet shell forming die structure 187, the plastic sheet shell forming die structure 188, the concrete prefabricated plastic mold 189, the combined plastic shutter special die 190, the plastic optical fiber double extrusion die 191, the plastic optical fiber double extrusion die polymerization reaction kettle 192, a plastic chip curing combination die 193, a plastic extrusion profile fully coated co-extrusion die 194, Molding die 195 for bearing seal and guide bearing of power generation equipment made of engineering plastics, compound forming die 196 for plastic pencil, plastic helical gear mold 197, plastic bellows heat dissipation molding mold 198, hollow plastic bottle blow molding mold 199 with handle, co-extrusion multicolor inner core plastic profile die 200, mold opening and closing linkage 201 of automatic plastic bottle blowing machine, inclusive co-extrusion die 202 of imitation wood grain plastic profile, Dies 203 for coextrusion composite plastic profiles with different plastic materials, 204 for plastic injection molding, 205 for a plastic film sealing and cutting machine, 206 for forming plastic optical fibers or plastic wires by co-extrusion, 207 for point gate plastic moulds, 208 for plastic pencil forming tees, 209 for plastic sheet extrusion, adjustable mold opener 210 for automatic plastic bottle blowing machine, Hot fluoroplastics flat extrusion up-blow die 211, mold 212 for moulding plastic parts, direct heating device 213 for flange connecting die of plastic processing extruder, direct heating device 214 for plastic flat wire drawing die, turntable type large diameter plastic pipe flaring die 215, oil storage cup upper cover side lobe closing plastic injection mold 216, a plastic hose line injection mold 217, Glass fiber mat reinforced thermoplastic sheet pressing die 218, plastic air pressure thermoforming mold 219, molded plastic pipe mold 220, metal and plastic composite extrusion die 221, inner concave closed plastic shell mold 222, both sides core-pulling injection mould 223 for plastic support box molding, two-stage lateral core-pulling device 224 of plastic mold, plastic injection-pressing composite molding mold 225, a mold for producing plastic three-wall bellows, In particular, a check valve 227 for a mold for a plastic molding machine, a mold mechanism 228 for a plastic container molding machine, a plastic mold 229, a molded plastic cellar mold 230, a mold connecting sleeve 231 for producing coated plastic door and window profiles, an integrated flange plastic pipe and its processing mold 232, a four-lobe side core-pulling plastic injection mold 233, a plastic mold 234 with elastic elements for limiting opening, The invention relates to a plastic injection mold 235 with a hydraulic cylinder core-pulling, a plastic injection mold 236 for protecting a multiple opening of the shaft sleeve, a plastic pipe metal mold 237, a plastic pressure pipe mold 238, a mold 239 for manufacturing foam, a plastic hose extrusion die 240, a mold 241 which can directly punch out specific specifications of plastic floor tiles, a new plastic dust cover mold 242, a shrinking inner core-pulling device for plastic moulds 243, and a shrinkage inner core-pulling device for plastic moulds. Mould 244 for molding products of directly injected and blown plastic hollow containers, plastic layer molding mould 245 for rolling plastic lining flange surface, plastic embossed plastic parts 246 for in-mold decoration which can be completed by ordinary injection moulds, plastic embossed profile moulds for doors and windows 247, metal-plastic composite molding moulds 248 with magnetic templates, plastic moulds 249 for double-layer thermal insulation bricks, a hot-pressing mold 250for welding plastic handbag handles, The utility model relates to a mold 251 for producing a plastic overturning plate lower nozzle, a protection circuit 252 for a plastic mold oil cylinder top withdrawal template, an electric heating die 253 for a plastic bag edge seal, a plastic faucet and a mold 254 thereof, a mold 255 for producing plastic foam insoles, an automatic demoulding die 256 for plastic pipe fittings with internal threads, a co-extrusion die 257 for the surface of plastic profiles, and an eccentric plastic inspection well forming die 258, Core fixing device 259 of plastic injection mold, injection molding mold 260 of thermosetting plastic, cooling channel 261 of plastic mold, rapid prototyping mold 262 for sheet molding, reference material of window rapid production mold for extruding plastic profiled materials:
What kinds of injection molding machines are there?
classification
(1) classified according to plasticizing mode
1. Plunger plastic injection molding machine
Its mixing property is very poor, plasticizing property is not good, so it is necessary to install a shunt shuttle device. It is seldom used.
Rely on the screw for plasticizing and injection, mixing and plasticizing properties are very good, now the most used.
3. Screw-plunger plastic injection molding machine plasticizing by screw and injection by plunger, the two processes are separated.
(2) classified according to the mode of mold closing.
1. Mechanical type
two。 Hydraulic type
3.。 Hydraulic-mechanical type
Injection molding machine, also known as injection molding machine or injection machine. It is the main molding equipment for making thermoplastics or thermosetting plastics into plastic products of various shapes by using plastic molding moulds. It is divided into vertical, horizontal and all-electric type. The injection molding machine heats the plastic and exerts high pressure on the molten plastic so that it can be ejected and fill the mold cavity.
So much for the introduction of the horizontal box opener. Thank you for taking the time to read the contents of this site. Don’t forget to look for more information about the horizontal box opener 3D and horizontal box opener on this site.
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