JPH0246982Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a pressure vulcanization device for rubber or plastic elongated bodies such as rubber or plastic coated electric wires or rubber or plastic hoses.

Normally, for example, in pressurized LCM (liquid heating medium type) continuous vulcanization equipment, when a pressurized vulcanized long body (electric wire, rubber hose, etc.) is pulled out under atmospheric pressure, scratches and other external injuries such as indentations occur on the surface. In order to commercialize products without any problems, various mechanisms are being considered for the outlet of the vulcanizer and the inlet of the cooling section. FIG. 1 is a longitudinal sectional side view showing a pressure vulcanization apparatus previously proposed by the present inventors. The pressure vulcanization section 1 shown in FIG. The elongated body 5 vulcanized within 2 penetrates so as to make light contact. The other end of the tank 2 (the left end in the figure) is connected to the crosshead (not shown) of the extruder, and at the crosshead is a long body made of a core coated with an unvulcanized polymeric material such as rubber or plastic. 5
passes through the heating medium 4 in the direction of the arrow. After the vulcanization bath 2, an air chamber tank 6 and a cooling section 7 are connected in sequence, and a multistage decompression section 8 in the cooling section 7 has a plurality of gaskets 9 arranged in the center thereof, each having a hole through which the elongated body 5 passes. It is divided into a plurality of subchambers W ₁ , W _{2 , . .} . , and an auxiliary cooling section 11 at approximately normal pressure is arranged thereafter. The cooling water supply line 2 is connected to the suction port of the pump 13, and from the main pipe 14 connected to the discharge port of the pump 13 is a distribution pipe 16 having a pressure regulating valve 15 in the middle.
branches, and each distribution pipe 16 has a corresponding branch chamber W ₁ , W ₂
It is connected to... Each branch room W ₁ , W ₂ . . . is connected to the supply tank 12 through a drain pipe 19 and a main drain pipe 20 having a check valve 17 and an on-off valve 18. 2
1 is a pressure gauge attached to each compartment. The air chamber 23 in the air chamber tank 6 is connected to a pressure supply device via an air pipe 24 having a pressure regulating valve 22 in the middle, and the air chamber 23 is
The upper end of the tank 3 communicates with an upper space 26 inside the tank 2 via an air pipe 25. 27 is a pressure gauge, 29 is a partition plate, and 28 and 28 are return pipes when the vulcanizing medium and cooling water overflow, respectively.

The heating medium 4 is maintained at a high temperature (for example, 200 to 250°C) suitable for vulcanizing the unvulcanized coating, and is
It is compressed to 0.5 to 30 Kg/cm ² by the air pressure supplied inside 23. Since an air chamber 23 is provided between the pressure vulcanization section 1 and the multi-stage decompression section 8, and there is a partition plate 29 in the center, there is a danger that the heating medium leaking from the packing 3 may come into contact with the cooling water. is prevented. The elongated body 5 is then taken out into the air chamber 23.
Since it is still in a high temperature state, there is a gasket 9 on its surface.
If they are brought into strong sliding contact, external damage such as scratches or impressions is likely to occur on the surface, so the gasket 9 in the multi-stage cooling section 8 is in light contact with the elongated body 5, and each water chamber W ₁ , W ₂ . The pressure in each water chamber W ₁ , W ₂ .
The pressure is adjusted.

However, according to the device shown in Fig. 1, each branch room W ₁ ,
It is necessary to read the pressure of W ₂ . In addition, air tends to accumulate at the upper end of each compartment, and when air accumulates, pulsations occur in the pressure in the compartment, and a sudden tightening phenomenon (hunting) against the elongated body 5 by the gasket in each water chamber tends to occur. Problems such as constrictions occurring on the surface of the long body at the crosshead portion of the extruder, and fluctuations in wall thickness when manufacturing coated wires or hoses are unavoidable.

Further, the cooling section 7 is shown in FIG.
As shown in the figure, a plurality of short cooling water pipes 7a are connected, and a gasket 9 is sandwiched between each cooling water pipe 7a. However, this structure of the cooling section 7 has a problem in that it takes time and effort to center the gasket 9 when assembling the cooling section 7.

The present invention aims to provide a continuous vulcanizing device free from the above-mentioned problems, and its purpose is (1) to prevent fluctuations in the outer diameter of a long body by preventing air from accumulating in each compartment of the cooling section; (2) simplify the control operation to prevent outside diameter fluctuation; and (3) make it easier to assemble the cooling section, especially centering the packing. The present invention will be explained below based on the drawings.

FIG. 3 shows a cross-sectional side view of the vulcanizing device according to the present invention, and the same reference numerals as those in FIG. 1 indicate corresponding parts. In FIG. 3, the cooling unit 30 has one cooling water pipe 31 extending in the longitudinal direction of the elongated body, and the cooling water pipe 31 has a plurality of annular packing holders H ₁ , H _{2 .}
. . . are fitted sequentially in the longitudinal direction of the elongated body from the inlet side of the cooling water pipe to the outlet side, and a final packing holder H' is fitted on the outlet end side. Each of the packing holders H ₁ , H ₂ . A holding pipe 32 is screwed onto the outlet end of the cooling water pipe 31.
The seal holders H ₁ , H _{2 .} . . and the final seal holder H' are tightened between the presser tube 32 and the entrance-side stopper 33.

In FIG. 4, which is a partially enlarged detailed view of FIG. 3, an annular groove 35 for an inflow path is formed on the outer periphery of the entrance side portion of each packing holder H ₁ , H ₂ . An annular groove 36 for an outflow path is formed in the holder, and an O-ring 37 is fitted between the annular grooves 35 and 36 on the same holder.

Annular groove 35 for inflow passage of each holder H ₁ , H ₂ ...
are in communication with the corresponding compartments W ₁ , W ₂ . The corresponding compartments W ₁ , W _{2 ,} . . . are communicated through the outflow holes 39, respectively. In each holder H ₁ , H ₂ . . . , one of the plurality of outflow holes 39 opens at the upper end of the corresponding compartment W ₁ , W ₂ . It communicates with the upper end portion of 36. Adjacent holders, for example, the first holder _H1 and the second holder on the inlet end side
A notch 40 is formed in the upper edge of the holder H ₂ to communicate the annular groove 36 for the outflow path of the first holder H ₁ and the annular groove 35 for the inflow path of the second holder H ₂ . Similarly, the annular groove 36 for the outflow path of the i-th holder Hi and the (i+1)th holder H(i+1)
The annular groove 35 for the inflow path is connected to the holder Hi, H(i+1)
They communicate through a notch (communication path) 40 in the upper edge of the . However, the annular groove 3 for the inflow path of the first holder _H1
5 communicates with the main supply pipe 14 via the upper end inlet portion 41 of the cooling water pipe 31, and the annular groove 36 for the outflow path of the n-th holder Hn communicates with the outlet portion 44 of the cooling water pipe 31. The main supply pipe 14 is connected to the pump 13 (third
It communicates with the cooling water supply tank 12 via the cooling water supply tank 12 (Fig.).

The gasket 9 is fixed to the step 47 on the inner peripheral side of the holder by a press-fit ring 48. Also, the first holder
An O-ring 49 is fitted around the outer periphery of the inlet side end of _H1 .

Note that FIG. 5 is a partial perspective view of FIG. 4 to clarify the structure of the inflow hole 38, the outflow hole 39, etc.

The cooling water sent from the pump 13 flows from the cooling water pipe inlet 41 to the inflow channel annular groove 3 of the first holder _H1 .
5 and enters the first compartment W ₁ through the inflow hole 38 . Further, from the first compartment W ₁ through the outflow hole 39, the annular groove 36 for outflow path and the notch 40, the second holder is connected.
It enters the annular groove 35 for the inflow path of H ₂ and enters the second compartment W ₂ through the inflow hole 38 . Thereafter, the cooling water is similarly sent to the n-th compartment Wn and discharged from the outlet portion 44 of the cooling water pipe 31. Since the outflow hole 39 is formed at least at the upper end of the holder H, air will not accumulate in each compartment W.

The advantages of the present invention are listed below.

(1) The cooling water outflow path (i.e., the annular groove 36 for the outflow path and the outflow hole 39), the cooling water inflow path (i.e., the annular groove 35 for the inflow path and the inflow hole 38), and the notch (communication path) 40 form each subchamber. Since the spaces W are communicated with each other and the outflow holes 39 are opened at least at the upper ends of the compartments, no air remains in each compartment W. Therefore, there is no possibility of pulsation occurring, and it is possible to prevent the phenomenon of sudden tightening of the elongated body by the packing 9 of each compartment, that is, hunting. Therefore, no constrictions or wall thickness fluctuations occur on the surface of the vulcanizate.

(2) Since the separate chambers W are communicated with each other, there is no need to adjust the pressure for each separate chamber, and the pressure adjustment work during vulcanization becomes less time-consuming.

(3) The cooling unit 30 is constructed by attaching the cooling part packing 9 to the annular packing holder H, and sequentially stacking and fitting the packing holder H into the cooling water pipe 31 extending in the longitudinal direction of the elongated body. This not only simplifies the assembly of the cooling unit 30, but also allows the centering of the gasket 9 to be performed extremely easily and accurately.

In addition, in FIG. 4, the inflow hole 38 and the outflow hole 3
Although the number of outflow holes 39 can be determined as appropriate, at least one of the outflow holes 39 should open at the upper end of the compartment.

Further, the inflow path is not limited to the structure consisting of the annular groove 35 for the inflow path and the radial inflow holes 38 as shown in FIG. 4, but if the structure shown in FIG. Long body 5 from all around
Since the cooling water flows toward the cooling water, it is most preferable in terms of the cooling effect.

Further, instead of the notch 40, a hole extending in the longitudinal direction of the elongated body may be formed as a communication path that communicates the grooves 35, 36.

[Brief explanation of the drawing]

FIG. 1 is a vertical side view of the conventional example, FIG. 2 is a detailed partial view of FIG. 1, FIG. 3 is a vertical side view of the vulcanization apparatus according to the present invention, and FIG. 4 is a detailed partially enlarged view of FIG. ,
FIG. 5 is a partial perspective view of FIG. 4. 1... Pressure vulcanization section, 9... Packing for cooling section,
30... Cooling section, 31... Cooling water pipe, 35, 38
...Inflow channel annular groove, inflow hole (inflow channel), 36,
39... Annular groove for outflow path, outflow hole (outflow path), 4
0... Notch (an example of a communication path), H ₁ , H ₂ ... Packing holder, W ₁ , W ₂ ... Separate room.

Claims (1)

[Scope of utility model registration request] In a continuous vulcanization device for rubber or plastic elongated objects having a pressure vulcanization section and a cooling section, a plurality of cooling section packings are each attached to an annular packing holder, and cooling water extending in the length direction of the elongated object is installed. The above-mentioned packing holders are sequentially stacked and fitted in the lengthwise direction of the long body from the inlet side to the outlet side of the long body to form a cooling section having a large number of compartments, and each seal holder has cooling water inflow. A cooling water outflow path opening at least at the upper end of the compartment is formed, and a communication path is formed at the upper end edge of the adjacent packing holder to communicate the outflow path of the inlet side holder and the inflow path of the outlet side holder. Features: Continuous vulcanization equipment for long rubber and plastic bodies.