10 conventional structures commonly used in plastic molds can basically meet more than 90% of produc

Time:2022-09-14 09:05:55 / Popularity: / Source:

1. Two-plate mold: referred to as big nozzle mold, as shown in following figure:
More than 60% of products can meet requirements of two-plate molds.
Two-plate mold 
2 Three-plate mold: referred to as fine nozzle mold, as shown in following figure:
In the case of complex product structure and multiple cavities in one mold, three-plate molds are basically used to dispense glue to meet product requirements.
hree-plate mold 
3. Two-plate and half-mold: referred to as core-pulling structure of front mold of large nozzle, it can also be called a simplified fine nozzle.
In the case of high product appearance requirements, front mold needs to be core-pulled through tunnel, and a two-plate half mold will be used.
two-plate half mold 
4. Open hot runner mold: also known as large nozzle mold hot runner feeding, as shown in following figure:
In the case of a large amount of products, in order to save molding cycle, save nozzle material, and save product price.
large nozzle mold 
5. Needle point hot runner mold: referred to as hot runner point injection, as shown in following figure:
When product appearance requirements are high, output is relatively large, needle point type hot runner can be used to save nozzle material, shorten molding cycle and save product price.
Needle point hot runner mold 
Needle point hot runner mold 
6. Needle valve type hot runner mold: It can also be said to be dispensing glue, as shown in following figure:
Needle valve type hot runner mold 
7. Master mold inversion mold: referred to as master mold ejection mold, as shown in following figure:
When product is relatively large and appearance requirements are high, it can be considered to pour glue backwards. For example, cover of notebook computer uses back glue.
Master mold inversion mold 
Master mold inversion mold 
8. Front mold Huff structure mold, as shown below:
When product is a ring type product, and circumference is inverted, front mold half structure can be considered.
Front mold Huff structure mold 
9. Secondary ejection structure mold: as shown in the following figure:
When product has a relatively small undercut surface, and undercut surface is only about 0.3~0.6mm, when lifter or the slider is not easy to pull core, a strong release mechanism can be used, and a secondary ejection structure needs to be used.
Secondary ejection structure mold 
10. Thread core pulling mold structure: as shown in following figure
When product is an internal thread, it is basically necessary to use a thread core-pulling structure.
Thread core pulling mold structure 
Thread core pulling mold structure 
 
Injection temperature guide table
Raw material name Code Nozzle temperature First temperature Second temperature Temperature of blanking section
Polystyrene PS 150-230℃ 
330-445℉
165-230℃
330-445℉
155-215℃
310-420℉
145-200℃
295-390℉
Styrene_Acrylonitrile SAN(AS) 190-280℃
380-540℉
150-230℃
300-445℉
150-230℃
300-445℉
150-230℃
300-445℉
Acylonitrile-Butadient-Styrene ABS 210-230℃
410-446℉
220-230℃
428-446℉
210-220℃
410-428℉
200-210℃
392-410℉
Cellulose Acetate CA 160-225℃
320-440℉
185-225℃
365-440℉
175-210℃
345-410℉
160-190℃
320-375℉
Cellulose Acetate Butyrate CAB 140-190℃
285-375℉
160-190℃
320-375℉
150-180℃
300-355℉
140-170℃
285-340℉
Acrylic PMMA 200-250℃
390-480℉
220-250℃
430-485℉
210-240℃
410-465℉
200-230℃
390-445℉
Polyphenylen oxide (Noryl) PPO 225-290℃
440-555℉
245-290℃
475-555℉
235-280℃
455-540℉
225-270℃
440-520℉
Polycarbonate PC 250-320℃
480-610℉
290-320℃
555-610℉
270-300℃
520-575℉
250-280℃
480-540℉
Polysulphone PSF 300-360℃
575-680℉
320-360℃
610-680℉
310-350℃
590-660℉
300-340℃
575-645℉
Polyamide 6.6 (Polyamide A) PA 260-295℃
500-565℉
270-295℃
520-565℉
270-295℃
520-565℉
270-295℃
520-565℉
Polyamide 6 (Polyamide B) PA 220-260℃
430-500℉
230-260℃
445-500℉
220-250℃
430-485℉
220-240℃
430-465℉
Polyamide 12 PA 195-250℃
385-480℉
200-250℃
390-480℉
190-240℃
380-465℉
190-240℃
380-465℉
Polyurethane (linear)
(Polyamide C)
PUR 175-230℃
345-445℉
200-235℃
390-455℉
190-225℃
375-440℉
180-215℃
365-420℉
Acetat resin POM 185-220℃
365-430℉
185-215℃
365-420℉
185-200℃
365-390℉
185-200℃
365-390℉
Lin. Polyester PETP 230-290℃
450-555℉
240-290℃
465-555℉
230-280℃
445-540℉
220-270℃
430-520℉
Polyethylene Soft PE 185-250℃
360-480℉
210-250℃
410-480℉
200-240℃
390-465℉
190-230℃
375-445℉
Polyethylene Hard PE 190-300℃
375-575℉
230-300℃
445-575℉
220-290℃
430-555℉
210-280℃
410-540℉
Polypropylene PP 230-300℃
445-575℉
220-290℃
430-555℉
210-270℃
410-520℉
200-250℃
390-480℉
Polytetrafluor-ethylene 
(Hostaflon Teflon FEP)
PCTFE
FEP
320-390℃
610-735℉
340-370℃
645-700℉
320-350℃
610-660℉
300-330℃
575-625℉
Tefzel ETFE 325-350℃
620-600℉
350-365℃
600-690℉
305-355℃
580-670℉
295-345℃
565-655℉
PVC Rigid PVC Rigid 145-180℃
295-355℉
160-180℃
320-355℉
150-170℃
300-340℉
140-160℃
285-320℉
PVC Soft PVC Soft 140-200℃
285-390℉
150-170℃
300-340℉
140-160℃
285-320℉
130-150℃
265-300℉
Polyphenylene
sulfide
PPS 310-320℃
590-608℉
310-320℃
590-608℉
300-310℃
572-590℉
290-300℃
554-572℉
Liquid Crystal Polymer LCP 290-310℃
554-590℉
310-330℃
590-626℉
300-320℃
572-608℉
280-290℃
536-554℉
Polyethersulfone PES 330-370℃
626-698℉
330-370℃
626-698℉
310-350℃
590-662℉
300-340℃
572-644℉
Polyamide-imide PAI 320-330℃
608-626℉
340-360℃
644-680℉
310-330℃
590-626℉
290-300℃
554-572℉
Polyetherimide PEI 325-410℃
617-770℉
320-405℃
608-761℉
310-395℃
590-743℉
310-330℃
590-626℉
Polyetheretherketone PEEK 360-400℃
680-752℉
380-410℃
716-770℉
370-400℃
698-752℉
350-380℃
662-716℉
 

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