Bad phenomena in forming of plastic moulding machine 1, lack of filling 2, spill 3, pore 4, ripple 5, Silver Stripe 6, external halo 7, fusion line 8, bubble 9, black stripe and burn mark 10, crack 11, release spill 12, bending 13, bad demoulding 14, bad demoulding of straight gate 15, bad overlapping edge of material

The following is an analysis of the causes

Cause of lack of filling

[1] The volume of formed parts is too large

[2] too small runner and gate

[3] Low nozzle temperature

[4] Low temperature or ejection pressure of materials

[5] Excessive distance of fluid movement in the inner chamber

[6] Die temperature is low

[7] Slow ejection speed

[8] Excessive supply of materials

[9] bad exhaust spills

[1] Lack of clamping force

[2] Poor die

[3] Impurities on Die Surface

[4] The projection area of the formed part is too large

[5] The temperature of the material is too high

[6] Excess material supply

[7] High ejection pressure

Stomatal causes:

When the material is fully dry, it is formed by transpiration or air. Most of the time, it occurs in the position of the product rubber thickness. In practice, vacuum bubbles are caused by the shortening of the material.

[1] too small runner or gate

[2] The wall thickness difference of formed parts is large

[3] High temperature of materials

[4] Long distance from gate

[5] premature demoulding

[6] Low ejection pressure

[7] Short cooling time

[8] insufficient pressure retention

Ripple

[1] Material inactivity

[2] Low Temperature of Die

[3] Moisture or transpiration components with too small silver stripes at the gate [1]

[2] The temperature of the material is too high

[3] Low Temperature of Die

[4] Poor exhaust

[5] Poor planning of forming products or dies

[6] Moisture or transpiration components on die surface

[8] Mixed materials

[9] Improper operation of propeller

Dark appearance

[1] Excessive lubrication or transpiration

[2] Too many fusion lines for demoulding

[1] Temperature of Materials

[2] Poor gate planning

[3] Too much transpiration or release agent in the material

[4] Fast setting of materials

[5] Poor planning of forming products

Bubble

[1] too small gate or runner

[2] Low ejection pressure

[3] Excess water

[4] Poor planning of forming products

[5] The practice of bad exhaust black streak and burning mark is that the material is decomposed and burned under high temperature and pressure.

[1] Material overheating

[2] poor forming machine

[3] Poorly planned gate, small exhaust and bad cracking of die

Practice is formed by internal stresses in the internal molecular structure of a material when irregular conditions are injected into a specific shape.

[1] Excessive ejection pressure

[2] Material activity is not smooth

[3] Push nail in thick layer

[4] Exhaust traceless

[5] Poor adjustment of pressure retention

[6] Large thermal cracks

[7] Corrosion off-mold spills of chemicals

[1] Poor gate planning

[2] Shooting speed

[3] Low temperature of materials

[4] Low Temperature of Die

Bend

[1] insufficient cooling

[2] Poor demoulding of direct gate

[3] uneven cooling

[4] Unsuitable ejection pressure

[5] inappropriate gate location

[6] Core bias

[7] The movable distance from gate is uneven, the demoulding is bad, [1] the directional pressure is high.

[2] Mould temperature adjustment is not good

[3] Poor planning of the die, poor ventilation from the die core, lack of strength of the die and poor demoulding of the direct gate [1] Poor equipment of the die

[2] Poor shape of straight gate

Poor overlap of materials

[1] Poor blanking of hopper

[2] too much crushed recycled material mixed in

[3] Excess External Lubricants