kif tagħżel magna tal-iffurmar tal-injezzjoni

There are two templates on the magna tal-iffurmar tal-injezzjoni, wieħed mhux miexi, imsejjaħ il-mudell fiss; l-ieħor jista 'jiġi mċaqlaq, imsejjaħ il-mudell li jiċċaqlaq. Il-moffa hija mwaħħla fuq iż-żewġ mudelli permezz ta 'viti u pjanċi tal-ippressar rispettivament. Meta tinfetaħ il-moffa, il-mudell mobbli tal-magna tal-iffurmar tal-injezzjoni jiċċaqlaq, b'hekk issuq il-moffa biex tiftaħ.

Wara l- moffa is manufactured, it is necessary to carry out injection molding, put on the injection molding machine, and start to produce products. Madankollu, there are many models of injection molding machines, and each injection molding machine has its own parameters. The design mold must be able to meet the requirements of the injection molding machine model provided by the customer, otherwise it will not be able to produce. Lil

There are many design parameters tal-magna tal-iffurmar tal-injezzjoni. The following will focus on several parameters related to the mold. I hope that readers will pay attention to the specific design of the mold. Lil

1. Injection volume
The injection volume is the maximum mass value (or volume value) that the injection molding machine can shoot at one time during production, and represents the maximum injection capacity of this type of injection molding machine. The amount of melt used in the designed mold is less than the injection volume of the injection molding machine. Otherwise, the product is dissatisfied and cannot be produced. Lil

2. Forza tal-ikklampjar
What happened was the pressing force of the injection molding machine on the template when the mold was closed. The clamping force required for the molded product during molding must be less than the rated clamping force of the selected injection molding machine. Otherwise, the molten glue will easily run off the parting surface, resulting in flash.

3. Tie rod spacing
There are four tie rods in the dead corners of the fixed template and the movable template of the injection molding machine. Their function is to ensure that the injection molding machine has sufficient strength and rigidity, and at the same time is responsible for the sliding template. Madankollu, it tends to limit the overall dimensions of the mold, because the mold is hoisted in from the middle of the tie rod during installation. Lil

The dimensions of the mold cannot be larger than the distance between the tie rods. If the length of the mold exceeds the distance between the tie rods, check whether the mold is hoisted into the rod workshop by rotating. If the rotary hoisting cannot be carried out, then the mold size can only be changed. , Or replace the injection molding machine. Lil

4. Nozzle size check
The nozzle head of the injection molding machine is generally spherical. When selecting the sprue sleeve, the spherical radius of the sprue sleeve should be consistent with the spherical radius of the nozzle. In order to prevent the high-pressure melt from overflowing from the contact gap between the nozzle and the sprue sleeve, the spherical radius of the sprue sleeve should generally be larger than the nozzle radius. Fl-istess waqt, the size of the small end of the main runner should also be slightly larger than the size of the nozzle hole. Easy to align the muzzle

The design of the gating system is an important part of the design of the injection mold. It has a direct impact on the injection molding cycle and the quality of the plastic parts (such as appearance, physical properties, preċiżjoni dimensjonali, eċċ.).

The following principles must be followed when designing
(1) The cavity layout and gate opening position should be symmetrical to prevent the mold from being subjected to unbalanced load and causing flashing.
(2) The arrangement of cavities and gates should reduce the overall dimensions of the mold as much as possible.
(3) The system flow channel should be as short as possible, and the cross-sectional size should be appropriate (too small, the pressure and heat loss will be large, and too large, the plastic consumption will be large); minimize the bending, and the surface roughness should be low to make the heat and pressure loss As small as possible.
(4) For multiple cavities, the plastic melt should enter the depths and corners of each cavity at the same time as much as possible, jiġifieri, the runners should be arranged in a balanced manner as much as possible
(5) On the premise that the cavity is full, the volume of the pouring system should be as small as possible to reduce the consumption of plastic.
(6) The gate position should be appropriate, try to avoid impacting the insert and the small core to prevent the core from deforming. The residual marks of the gate should not affect the appearance of the plastic part.

Five hazards of high temperature of magna tal-iffurmar tal-injezzjoni
Il-ħames perikli ewlenin ta 'żieda eċċessiva fit-temperatura tal-magna tal-iffurmar tal-injezzjoni huma: deformazzjoni termali tal-magna, viskożità taż-żejt imnaqqsa, deformazzjoni tas-siġilli tal-gomma, ossidazzjoni aċċellerata taż-żejt u deterjorazzjoni, u pressjoni mnaqqsa tal-komponent tal-arja.

Wieħed mill-perikli: deformazzjoni termali tal-magna
The moving parts with different coefficients of thermal expansion in the hydraulic components are stuck due to their smaller fits, tikkawża ħsarat, li jaffettwaw l-eżattezza tat-trażmissjoni tas-sistema idrawlika, u tiddeterjora l-kwalità tax-xogħol tal-partijiet.

Ħsara tnejn: tnaqqas il-viskożità taż-żejt
Żieda eċċessiva fit-temperatura tal-magna tal-iffurmar tal-injezzjoni tikkawża li tonqos il-viskożità taż-żejt, iżżid it-tnixxija, u l-effiċjenza volumetrika tal-pompa u l-effiċjenza tas-sistema kollha se titnaqqas b'mod sinifikanti. Hekk kif il-viskożità taż-żejt tonqos, il-film taż-żejt tal-valv li jiżżerżaq u partijiet oħra li jiċċaqalqu isir irqaq u maqtugħ, and the friction resistance increases, li jirriżulta f'użu akbar.

Periklu 3: Deformazzjoni tas-siġilli tal-gomma
Żieda eċċessiva fit-temperatura tal-magna tal-iffurmar tal-injezzjoni se tiddeforma s-siġilli tal-gomma, taċċellera l-falliment tax-xjuħija, tnaqqas il-prestazzjoni tas-siġillar u l-ħajja tas-servizz, u tikkawża tnixxija.

Periklu 4: Aċċellera l-ossidazzjoni u d-deterjorazzjoni taż-żejt
Żieda eċċessiva fit-temperatura tal-magna tal-iffurmar tal-injezzjoni se taċċellera l-ossidazzjoni u d-deterjorazzjoni taż-żejt, sustanzi bituminużi preċipitati, u tnaqqas il-ħajja tas-servizz taż-żejt idrawliku. Il-preċipitati jimblokkaw l-orifiċju tad-damping u l-port tal-valv tal-qasma, li tikkawża li l-valv tal-pressjoni jeħel u ma jkunx jista 'jiċċaqlaq, u l-pajp tal-metall huwa miġbud u mgħawweġ, jew saħansitra faqqgħet.

Periklu 5: Li jwassal għal kwalità fqira tax-xogħol tal-komponenti
Excessive temperature rise of the magna tal-iffurmar tal-injezzjoni will result in poor working quality of the parts, and the dissolved air in the oil will escape, li jirriżulta fi bwiet ta 'l-arja, li se jnaqqas il-prestazzjoni tax-xogħol tas-sistema idrawlika. It-temperatura ideali tax-xogħol tas-sistema idrawlika għandha tkun bejn 45 gradi u 50 gradi. Ir-raġuni hija li s-sistema idrawlika hija ddisinjata skont viskożità taż-żejt tal-pressjoni magħżula, Iżda l-viskożità tinbidel bit-temperatura taż-żejt, li se jaffettwa x-xogħol fis-sistema. Komponenti, bħal ċilindri taż-żejt, Valvi idrawliċi, eċċ., Naqqas il-preċiżjoni tal-kontroll u s-sensittività tar-rispons, speċjalment għal magni ta 'injezzjoni ta' preċiżjoni.

Fl-istess waqt, if the temperatura huwa għoli wisq, se taċċellera x-xjuħija tas-siġill u tikkawżaha tibbies u xquq; Jekk it-temperatura hija baxxa wisq, l-enerġija tal-ipproċessar se tiġi kkunsmata u l-veloċità operattiva titnaqqas. Għalhekk, huwa meħtieġ li tingħata attenzjoni mill-qrib għat-temperatura tax-xogħol taż-żejt idrawliku. Hemm ħafna raġunijiet għat-temperatura għolja taż-żejt, Iżda ħafna minnhom huma dovuti għan-nuqqas taċ-ċirkwit taż-żejt jew il-falliment tas-sistema tat-tkessiħ.

Jekk għandek xi mistoqsijiet dwar iffurmar bl-injezzjoni ,plz tħossok liberu li tistaqsi tim FLYSE,aħna nagħtuk l-aħjar servizz!