kiel elekti injektan muldan maŝinon

There are two templates on the injekta muldilo, one is not moving, called the fixed template; the other can be moved, called the moving template. The mold is fixed on the two templates by screws and pressing plates respectively. Kiam la muldilo estas malfermita, the movable template of the injection molding machine moves, thereby driving the mold to open.

After the ŝimo is manufactured, it is necessary to carry out injection molding, put on the injection molding machine, and start to produce products. Tamen, 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. Al

There are many design parameters of the injection molding machine. 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. Al

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. Al

2. Krampforto
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. Tamen, 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. Al

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. Al

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. Samtempe, 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, dimensional accuracy, ktp.).

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, tio estas, 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 injekta muldilo
The five major hazards of excessive temperature rise of the injection molding machine are: termika deformado de la maŝino, reduktita oleoviskozeco, deformado de kaŭĉukaj sigeloj, akcelita oleooksidado kaj difekto, kaj reduktita aerkomponenta premo.

Unu el la danĝeroj: termika deformado de la maŝino
The moving parts with different coefficients of thermal expansion in the hydraulic components are stuck due to their smaller fits, kaŭzante misfunkciojn, influante la transdono-precizecon de la hidraŭlika sistemo, kaj malbonigante la laborkvaliton de la partoj.

Malutilu du: redukti la viskozecon de la oleo
Troa temperaturaltiĝo de la injektomuldmaŝino kaŭzos la viskozecon de la oleo malpliiĝi, pliigi la elfluon, kaj la volumetra efikeco de la pumpilo kaj la efikeco de la tuta sistemo estos signife reduktitaj. Ĉar la viskozeco de la oleo malpliiĝas, la oleofilmo de la glitanta valvo kaj aliaj moviĝantaj partoj fariĝas pli maldika kaj tranĉita, and the friction resistance increases, rezultigante pliigitan eluziĝon.

Danĝero 3: Deformado de kaŭĉukaj sigeloj
Troa temperaturaltiĝo de la injekta muldmaŝino misformos la kaŭĉukajn sigelojn, akceli la maljuniĝan fiaskon, redukti la sigelan rendimenton kaj servodaŭron, kaj kaŭzi elfluon.

Danĝero 4: Akceli la oksigenadon kaj difekton de oleo
Troa temperaturaltiĝo de la injekta muldmaŝino akcelos la oksigenadon kaj difekton de la oleo, precipitaj bitumaj substancoj, kaj redukti la servodaŭron de la hidraŭlika oleo. La precipitaĵoj blokas la malseketigantan orificion kaj la fendan valvan havenon, igante la premvalvon iĝi blokita kaj nekapabla moviĝi, kaj la metala tubo estas etendita kaj fleksita, aŭ eĉ krevis.

Danĝero 5: Kondukante malbonan laborkvaliton de komponantoj
Excessive temperature rise of the injekta muldilo will result in poor working quality of the parts, and the dissolved air in the oil will escape, rezultigante aerpoŝojn, kiu reduktos la laboran agadon de la hidraŭlika sistemo. La ideala labortemperaturo de la hidraŭlika sistemo devus esti inter 45 gradoj kaj 50 gradoj. The reason is that the hydraulic system is designed according to a selected pressure oil viscosity, but the viscosity will change with the oil temperature, kiu influos la laboron en la sistemo. Komponentoj, kiel ekzemple oleocilindroj, hidraŭlikaj valvoj, ktp., reduktu kontrolo-precizecon kaj respondsentemon, precipe por precizecaj injektaj maŝinoj.

Samtempe, if the temperaturo is too high, it will accelerate the aging of the seal and cause it to harden and crack; if the temperature is too low, la pretiga energio estos konsumita kaj la operacia rapideco estos reduktita. Tial, necesas tre atenti la labortemperaturon de hidraŭlika oleo. Estas multaj kialoj por la alta oleotemperaturo, sed la plej multaj el ili ŝuldiĝas al la fiasko de la oleo-cirkvito aŭ al la fiasko de la malvarmiga sistemo.

Se vi havas demandojn pri injekta muldado ,bonvolu demandi FLYSE-teamo,ni donos al vi plej bonan servon!