JPH043774Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" The present invention utilizes the rotational force of a plastic material, particularly a screw shaft, and supplies a belt-shaped or string-shaped rubber material that is not affected by the advance or retreat of the screw shaft. The present invention relates to a supply device for plate-shaped or string-shaped raw materials, which is provided with a detection device that is activated when the rubber material runs out, and is equipped with a notification device that is linked to the device.

``Prior art'' Conventionally, powders and pellets are often used as plastic molding materials, and these molding materials are supplied to screw cylinders through hoppers.However, it is not technically possible to use hoppers for belt-shaped or string-shaped rubber materials. It's difficult.

Therefore, a strip of rubber material is supplied to the screw cylinder via a separate rubber material supply device (not shown).

Supplied.

Therefore, in the case of a direct drive system using a hydraulic motor, etc., it is necessary to provide a material supply device in addition to the screw shaft drive device, which increases equipment investment and increases the cost of the product. do not have.

``Problems to be solved by the invention'' In view of these problems, the present invention has developed a special equipment for supplying rubber materials by utilizing the rotational driving force of an injection molding machine or an extrusion molding machine. This is because only the material feed shaft can move forward and backward through the slit of the material feed roll so that the screw shaft does not need to be provided and at the same time does not interfere with the rotation of the forward feed roll when the screw shaft moves backward or forward.

"Means for Solving the Problems" The present invention takes the following technical means to solve the above problems.

In other words, a feeding device for belt-shaped or string-shaped raw materials that meets the conditions ABCD and E below.

A. The first drive member is attached to the rear end of the screw shaft.

B. A second driving member is attached to the material feeding shaft arranged on a vertical line of the first driving member.

C. An endless chain or belt is placed between the first drive member and the second drive member, and a material feed roll is inserted into the material feed shaft to which the second drive member is attached.

D. The material feed roll has a finite slit in the axial direction that is closed at one end and open at the other end, and the lower end of a bolt slidably inserted into the slit is screwed into the material feed shaft. That's what I'm doing.

E. Following the advance or retreat of the screw shaft, the material feed shaft also advances or retreats along the finite slit of the pipe.

"Operation" The rubber material is smoothly fed into the temperature control cylinder by the rotation of the material feed roll and auxiliary roller.
Furthermore, the amount of rubber material supplied is accurately measured by the continuously rotating and retracting screw shaft.

"Example" An embodiment of the present invention will be described below based on the drawings.

Since the plastic material is a rubber material in the form of a band or string, the temperature of the injection cylinder 10 is preferably controlled or cooled.

A screw shaft that can move forward or backward is inserted into the injection cylinder 10.

The screw shaft consists of a screw part 11 and a shaft part 12, and the screw part 1
A supply port 13 facing 1 is formed in the cylinder 10, and the shaft portion 12 is supported by a bearing 101 of the injection cylinder 10 and a rear bearing 14.

A first driving member, that is, a first driving pulley 15 or a sprocket is attached between the bearing 101 and the rear bearing 14 of the shaft portion 12 via a split collar or the like, and a rotating shaft 121 is attached to the end of the shaft 12. A hydraulic motor 16 is connected to the rotating shaft 121 via a joint member, and rotates the screw shaft and the material feed shaft 19.

An end plate 18 is welded to a bearing block 17 that supports the bearing 14, and a material feed shaft 19 is rotatably supported on the end plate 18.

20 is a second driving member, that is, a second driving pulley or a second driving sprocket attached to the material feeding shaft 19 on the vertical line of the first driving pulley 15, and the upper and lower first and second driving sprockets 15 , 20 is provided with an endless belt 21 or chain.

The material feed shaft 19 has a finite slit 22.
A material feed roll 23 formed in the axial direction is fitted therein.

The material feed roll 23 is rotatably fitted into front and rear frames 24 and 25 provided perpendicularly to the rear of the injection cylinder 10, and its tip is secured to a nut 26.
It is pivotally connected to the frame 24 via.

Female threads are formed at required locations on the material feed shaft 19, and the head of the bolt 27 screwed into the female thread is inserted into the finite slit 22 of the material feed roll 23.
is inserted into.

A shaft 29 of an auxiliary roll 28 is rotatably fitted into the frames 24, 25.

30 is a material detection piece attached to the end face of the auxiliary roll 28, and the proximity switch 3 is perpendicular to the detection piece 30.
1 are set at required intervals.

32 is a band-shaped rubber material, 33 is an injection hydraulic cylinder, and the piston rod 34 of the hydraulic cylinder 33 is connected to the bearing block 17 by a bush 35.
The screw shaft is slidably attached to the screw shaft to advance the retracted screw shaft to a predetermined position.

40 is a detection piece attached to the shaft 29 of the auxiliary roll 28.

"Effect of the invention" Since the material feed roll in which the finite slit is formed is integrated with the material feed shaft via bolts, the material feed roll rotates simultaneously with the rotation of the material feed shaft.

Therefore, the auxiliary roll disposed parallel to the material feed roll rotates through the rubber material, and the rubber material is reliably and smoothly supplied to the material supply port of the injection cylinder.

The screw shaft is metered and retracted according to the amount of rubber material supplied.

At this time, the first and second drive pulleys also rotate and retreat together with the screw shaft.

The material feed shaft, which is integrally constructed with the second drive pulley, transmits rotation to the finite slit of the material feed roll via a bolt, and at the same time can slide and retreat, which is a unique feature of this invention. play.

After retreating to a predetermined position, the check valve is opened, and the bearing block supporting the screw shaft is moved forward by the operation of the hydraulic cylinder, and a predetermined amount of rubber material is injected.

In addition, when the rubber material is smoothly supplied to the screw section through the supply port of the injection cylinder by the material feed roll and the auxiliary roll, that is,
If the detection piece passes in front of the proximity switch during the required cycle, the proximity switch will not operate, but when the material runs out, the rotation of the auxiliary roll will stop, and the detection piece will no longer pass in front of the proximity switch. So, when I discovered that the material was out, the alarm buzzer went off.

[Brief explanation of the drawing]

Figure 1 is a partial cross-sectional plan view of a direct drive system equipped with the material supply device of the present invention, Figure 2 is a vertical cross-sectional front view of the main parts of the material supply device of the present invention, and Figure 3 is a diagram showing material supply and material cutting. FIG. 2 is an enlarged schematic diagram showing the detection device of FIG. DESCRIPTION OF SYMBOLS 10... Injection cylinder, 11... Screw part, 12... Shaft part, 15... First drive member, 20... Second drive member, 19... Material feeding shaft.

Claims (1)

[Scope of Claim for Utility Model Registration] A feeding device for belt-shaped or string-shaped raw materials that meets the conditions ABCD and E below. A. The first drive member is attached to the rear end of the screw shaft. B. A second driving member is attached to the material feeding shaft arranged on a vertical line of the first driving member. C. An endless chain or belt is placed between the first drive member and the second drive member, and a material feed roll is inserted into the material feed shaft to which the second drive member is attached. D. The material feed roll has a finite slit in the axial direction that is closed at one end and open at the other end, and the lower end of a bolt slidably inserted into the slit is screwed into the material feed shaft. That's what I'm doing. E. The material feed shaft also moves forward or backward along the finite slit of the pipe in accordance with the forward movement or backward movement of the screw shaft.