Impact Crusher | XingQing Machinery

Product OverviewProduct Overview

Impact Crusher uses high-speed rotating blow bars on the rotor to apply impact force, causing material to repeatedly collide and fracture between blow bars and impact plates. After material enters the crushing chamber, it is accelerated by high-speed rotating blow bars and thrown toward the impact plates, then rebounds back to the blow bar zone. This "blow bar impact — impact plate rebound — re-impact" cycle continuously fractures material along its natural joints and weak planes, providing selective crushing — softer components break first while harder components retain larger size. Final product has cubic particle shape with flake content far lower than jaw crusher, making it the preferred equipment for projects with strict aggregate shape requirements such as high-grade highway surfaces and hydropower dam construction.

Working PrincipleWorking Principle

1

High-Speed Blow Bar Impact Acceleration

After material enters the crushing chamber from the feed opening, the high-speed rotor (30-45 m/s tip speed) blow bars strike material with extremely high kinetic energy, accelerating it to near rotor tip speed and throwing it along the tangential direction.

2

Multiple Impact Plate Rebound Collisions

Thrown material strikes the upper impact plate (first stage) and rebounds back to the rotor zone for another blow bar impact, then hits the second-stage impact plate and rebounds again. Material forms a "Z"-shaped repeated collision path between blow bars and the two-stage impact plates.

3

Selective Crushing & Discharge

The gap between impact plates and blow bars determines final product size. Material fractures along natural joints and weak planes during repeated impact, discharging from the bottom opening when reaching target size. Impact plate gaps can be adjusted hydraulically or manually to control discharge size.

Blow Bar & Impact Plate Multi-Collision Crushing Path

Material entry → Blow bar impact accelerates & throws → 1st stage impact plate rebound → Blow bar secondary impact → 2nd stage impact plate rebound → Discharge from bottom when reaching size

PF vs. PFV Series ComparisonPF vs. PFV Series

Comparison Item	PF Series (Standard)	PFV Series (Fine Crushing)
Feed Opening Shape	Wide rectangular (820-1600mm wide)	Narrow tall rectangular (400-860mm wide)
Max Feed Size	300-1000 mm	300-500 mm
Capacity	24-860 t/h	25-180 t/h
Crushing Ratio	Medium (10-20)	Large (15-30)
Application	Primary/medium crushing, large material primary impact	Medium/fine crushing, finer and more uniform discharge
Typical Discharge Size	15-60 mm	5-30 mm

PF SeriesTechnical ParametersPF Series Parameters

Model	FeedOpening Size (mm)	MaxFeed (mm)	生Capacity力 (t/h)	Motor power (kW)	Weight (t)	Dimensions L×W×H (mm)
PF-1007	820×700	300	24-45	37-55	9.5	1800×1600×1800
PF-1010	1170×720	350	50-80	55-75	10	2340×2007×2500
PF-1210	1090×465	350	80-130	110-132	14	2582×2053×2809
PF-1214	1440×465	350	100-160	132-160	18	2582×2403×2809
PF-1315	1532×560	500	140-200	180-220	19.3	2930×2761×3053
PF-1515	1580×696	500	220-280	250-280	28.5	3553×2835×3277
PF-1620	1600×2080	800	350-450	500-560	47.5	3800×3350×3250
PF-1822	1500×2250	1000	550-860	630	90	4260×3550×3640

※ PF Series suitable for primary and medium crushing, large feed opening and high capacity. Based on limestone (compressive strength ≤150MPa); capacity when crushing granite is approximately 60-80% of nominal value.

PFV SeriesTechnical ParametersPFV Series Parameters

Model	FeedOpening Size (mm)	MaxFeed (mm)	生Capacity力 (t/h)	Motor power (kW)	Weight (t)	Dimensions L×W×H (mm)
PFV-1007	400×730	300	25-45	55	10.5	1800×1600×1800
PFV-1010	400×1080	350	35-60	75	14.8	2340×2007×2500
PFV-1210	400×1080	350	45-100	110	18	2582×2053×2809
PFV-1214	400×1430	350	60-140	132	23.5	2582×2403×2809
PFV-1315	860×1520	500	70-180	200	28	2930×2761×3053

※ PFV Series positioned for medium-fine crushing, narrower feed opening allows longer material retention in chamber for more thorough crushing and more uniform discharge shape. Technical data subject to change without notice.

Structure ComponentsStructure Components

Component	Function	Material / Features
Rotor & Blow Bar	Core component of impact crusher, consisting of main shaft, rotor body and 4-6 blow bars. Rotor rotates at high speed (30-45 m/s tip speed), blow bars fixed to rotor body via wedges or bolts, impacting and crushing material. Large rotors dynamically balanced for smooth operation	42CrMo shaft + high chromium cast iron blow bar
Impact Plate (Two-Stage)	First stage impact plate (upper) withstands the most intense material impact for primary crushing; second stage (lower) handles fine crushing and shaping. Both stage impact plate gaps independently adjustable to control discharge size. Impact plate surface cast with wear-resistant teeth	High manganese steel ZGMn13 / wear-resistant cast steel
Impact Plate Adjustment Device	Adjusts gap between impact plate and blow bar via hydraulic cylinder or screw mechanism for discharge size control and overload protection. Impact plate can retreat when encountering uncrushable material, protecting the main machine from damage	Hydraulic cylinder or spring screw
Crushing Chamber Shell	Upper and lower shell sections bolted together, with impact plate liners on inner wall. Shell uses integral casting or thick steel plate welded structure to withstand enormous impact loads. Feed opening at top, discharge opening at bottom	ZG270-500 cast steel / Q345B welded
Homogeneous Plate (Grinding Plate)	Arc-shaped liner in the discharge zone, providing final grinding and shaping to ensure cubic discharge particle shape with minimal flake particles	High chromium cast iron / wear-resistant alloy steel
Drive & Frame	Motor drives rotor via V-belts or hydraulic coupling. Frame is a rigid steel section welded base that withstands crushing impact forces. Large models equipped with hydraulic coupling for soft start, reducing grid impact	Y Series motor + hydraulic coupling (optional)

Product FeaturesProduct Features

Large Crushing Ratio, High One-Pass Yield

Uses dual impact + rebound force for "selective crushing", single-stage crushing ratio up to 10-30 (jaw crusher only 4-6). Suitable for two-stage crushing replacing fine jaw + cone crusher combination, simplifying process and reducing equipment count.

Excellent Particle Shape, High Cubicity

Stone repeatedly collides between blow bars and impact plates, with flake particles preferentially breaking along weak planes. Finished product is cubic with flake content below 8% (jaw crusher typically 15-25%), meeting high-standard requirements for highway and hydropower station aggregates.

Overload Protection, Safe & Reliable

Impact plates equipped with spring or hydraulic overload protection devices. When uncrushable materials (bucket teeth, iron blocks, etc.) enter the crushing chamber, impact plates automatically retreat to allow passage, then auto-reset after the foreign object is discharged, protecting the rotor and blow bars from damage.

Convenient Wear Part Replacement

Blow bars use wedge-type locking structure, replaceable through the side maintenance door without disassembling the rotor. Impact plate liners are modular design with single-piece light weight, allowing individual replacement of worn areas for high maintenance efficiency and short downtime.

Adjustable Discharge Size

Discharge size can be steplessly adjusted within a certain range by hydraulically or manually adjusting the gap between two-stage impact plates and blow bars. PF Series typical discharge 15-60mm, PFV Series can reach 5-30mm, meeting various operating conditions.

Low Energy, High Capacity

Crushing work is directly applied to material without excess friction loss, with per-ton power consumption 20-30% lower than jaw crushers. Large PF-1822 achieves capacity of 550-860 t/h, making it the core secondary crushing equipment for large aggregate production lines.

Application FieldsApplication Fields

Highway & High-Speed Rail Base Aggregates

Highway asphalt surface and concrete base have strict aggregate shape requirements (flakes ≤10%). Impact crusher discharge is cubic with rich edges and corners, good adhesion with asphalt — standard equipment for road surface aggregates.

Hydroelectric & Water Conservancy

Dam concrete requires high-strength, excellent-shape coarse aggregates. Impact crusher can process hard rock like granite and basalt, producing cubic aggregates that improve concrete density and compressive strength, meeting hydraulic specifications.

Manufactured Sand & Aggregate Production

Replaces cone crusher in secondary or tertiary crushing stages, reducing 100-300mm material from jaw crusher to 15-40mm finished aggregate in one pass. Combined with sand maker, forms efficient "jaw + impact + sand maker" three-stage closed-circuit aggregate production line.

Construction Waste & Concrete Recycling

Impact crusher excels in construction waste processing: impact crushing effectively separates concrete from rebar, selective crushing strips old cement paste from aggregate surfaces, producing clean recycled aggregates. PF Series large feed opening can directly accept reinforced concrete blocks.

Highway SurfaceHydro DamHSR AggregateGraniteLimestoneConcrete RecyclingConstruction WasteAggregate LineManufactured Sand

Selection AdviceSelection Advice

PF or PFV depends on crushing stage: As secondary crusher (after jaw), choose PF Series large feed models for high throughput. As tertiary fine crusher/shaping, choose PFV Series — narrow feed allows longer retention for better shape. For road projects with strict shape requirements, prioritize PFV.
Material hardness determines suitability: Impact crusher best for medium-soft rock ≤150MPa (limestone, dolomite, sandstone) and medium-hard rock ≤350MPa (granite, basalt). For high-silica, highly abrasive quartzite, blow bar life will be significantly reduced — cone crusher recommended instead.
Feed opening width > 1.2× max feed size: If max feed is 300mm, PF-1007 (820×700 opening) is sufficient; 500mm max requires PF-1315+. PF-1822 opening 1500×2250mm can directly accept jaw crusher discharge without intermediate screening.
Blow bar material & wear cost: High Cr cast iron suitable for medium-soft limestone, life 300-500h/set. High Mn steel suits high-impact hard rock. Blow bars reversible (double-sided wear), replacement 1-3 months. At 2000h annual operation, annual blow bar cost ~5-10% of equipment price.