Precision Preformer is a kind of high-efficiency and high-precision device for manufacturing rubber blank. It can be used in combination with a wide range of rubber material in extruding rubber blank of mid to high hardness and of intricate shapes such as circle and solid figures. Owing to its high precision volume and low air content, it is capable of producing products ranging from rubber sundries, sealing members,tyre valves, tennis balls and shoe soles.

● PLC control system and touch screen operator interface.    Color touch screen to input data and password protection. ● 200 products technics database available to connect anytime. ● Variable inverter controlled infinite speed regulation for cutter    speed. ● Weigh scale feedback close loop for blank weight control. ● Reliable safety performance. There are interlocks when close    ram head, the cutter rotates and ram move forwards and    retracts. ● Graphic and text display for failure point and causes.

● Quick return on investment (labor & material saving). ● Suitable to preform diversified rubber material as     vulcanizing required. ● Special balance design for cutter and runs stably. ● Special logic hydraulic circuit with patent to insure     weight precision for rubber blanks.

　　◇  Structure introduction
The precision preformer is composed of a ram extruder and a rubber blank cutter attached to the ram head. It is also equipped with hydraulic, vacuum, heating, pneumatic and electrical system. While in operation, the first step is to open the ram head and add the preheated prehensile rubber material into the machine from anterior part of the barrel. After that, the ram head is to be closed to adjust the extruding and cutting speed (volume control chart is provided with the machine). Eventually, after vacuumization and cutting, the rubber blank with precise weight will then be obtained.
1. Extruding device: It is composed of hydraulic cylinder, batching barrel and ram head.
2. Hydraulic device: This device is selected with high-pressure gear pump and YUKEN flow valve imported from Japan. Hydraulic oil in hydraulic cylinder is controlled by the flow valve and the pressure difference prior to and after throttling is controlled at a constant value so as to ensure the precise weight of the rubber blank extruded. This device is equipped with cooling system driven by 2 sets of hydraulic axletrees which can make reasonable and effective use of energy and control the temperature of the hydraulic oil.
3. Pneumatic device: It is used to open and close the ram head as well as control the movements of other devices, for example, the cylinder.
4. Vacuumizing system: Before extruding and cutting of rubber material, the vacuumization aims at eliminating the air remained inside the barrel and the ram head as well as the gas contained in the rubber material so as to improve the quality of sulfur products to be produced in the following process.
5. Heating system: With the adoption of water circulation heating method, the temperature is controlled and displayed by the digital thermostat which can effectively maintain the constant temperature of the ram head and the barrel.
6. Cutting device: It is composed of frame, electromotor and deceleration system, which can conduct speed transmission via four-speed motor gearbox and frequency conversion motor. In addition, there is also a transmission system installed under the frame.

　　JY(Z) Technical data:

Item	Unit	JY150	JY200	JY250	JYZ200	JYZ250
Barrel inside diameter	mm	150	200	250	200	250
Total power	Kw	16	16	19	16	19
Max. oil cylinder pressure	MPa	36.8	20.7	17	20.7	17
Max. barrel temperature	°C	95	95	95	95	95
Max. die diameter	mm	80	125	190	125	190
Rubber blank weight range	g	0.3～100	0.3～200	0.3～2000	0.3～200	0.3～2000
Rubber blank weight accuracy	%	±1.0	±1.0	±1.0	±1.0	±1.0
Single feeding volume	kg	12～13	20～25	60～70	20～25	60～70
Cutter speed	r/min	35～300	35～300	23～300	35～300	23～300
External dimension(L×W×H)	m	4×1.1×1.8	3.6×1.15×1.64	5×1.15×1.64	3.6×1.15×1.64	5×1.15×1.64
Weight	T	2.8	3	4	3	4