JPH0572428U - Resin mandrel connection device - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] There is no step at the joint of the resin mandrel, and it is possible to always connect linearly and with high accuracy, and the flow of resin at the welded portion is small Provided is an improved resin mandrel connecting device. [Structure] In the vicinity of the terminal portions 3a and 3b of the resin mandrel,
Clamping means 6a, 6b that are movable in the horizontal direction
Clamped by the terminal part 3a of the resin mandrel,
In a connecting device for resin mandrels 1a, 1b configured to butt and connect 3b in a state of being melted by a heating and melting means 7, a division in which the heating and melting means 7 covers an outer peripheral surface of a terminal connecting portion of the resin mandrel. Mold 8a, 8
b, and mold frames 11a and 11b that can detachably hold the split molds 8a and 8b and that are provided with mold heating means and cooling means and that can be opened and closed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a resin mandrel connecting device, and more particularly to a resin mandrel connecting device capable of accurately connecting terminal connecting portions of a resin mandrel.

[0002]

[Prior Art]

 Generally, when manufacturing a long hose, a resin mandrel made of nylon or the like is used, but this resin mandrel is used by cutting it according to the length of the hose, etc., so the resin mandrel can be reused. If so, it is necessary to connect the resin mandrels together.

Conventionally, as a device for connecting a resin mandrel as described above, after the cut end faces of the resin mandrel are brought into contact with both side surfaces of a heating plate heated to such a degree that the resin is melted, and after heating and melting for a certain period of time, , Remove the hot plate. After that, the end faces of the melted resin mandrel are butted against each other, pressure-bonded, and then cooled and solidified to be connected.

[0004]

[Problems to be solved by the device]

 However, in the case of the resin mandrel connection method as described above, the bent state is connected due to the bending tendency of the resin mandrel, the step difference of the connection part due to the difference in outer diameter is inevitable, and the resin flow at the connection weld part is large. In addition, there is a problem that the workability and the productivity are extremely poor because a so-called finishing work is required to scrape off the flow portion with a knife after connecting.

The present invention has been made in view of such conventional problems, and can always linearly and accurately connect without causing a step at the joint of the resin mandrel, and the connection welding portion Since there is little resin flow, it is possible to omit the finishing work such as scraping off the flow part with a knife or the like, and it is an object to provide a resin mandrel connecting device capable of significantly improving workability and productivity. To do.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention comprises a heating / melting means for a connection portion of a resin mandrel, a split mold for covering the outer peripheral surface of a terminal connection portion of the resin mandrel, and a detachable mold for holding the split mold in a detachable manner. The gist is that it is composed of an openable and closable mold frame equipped with the above heating means.

[0007]

[Function of the device]

 The present invention is configured as described above, and in the state where the connection end faces of the resin mandrel are butted against each other, the outer peripheral surface is covered with a split mold, and the connection end face of the resin mandrel is melted and butt-bonded by the heating and melting means to perform crimp By cooling and solidifying in the split mold as it is, the joints of the resin mandrels are always linear, and since there is little resin flow, finishing work such as scraping off the flow part with a knife can be omitted. Is.

[0008]

[Example of device]

 An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a front view of a resin mandrel connecting device embodying the present invention, and 1a and 1b show a divided resin mandrel used for manufacturing a hose made of 6 nylon, 11 nylon or the like, and 2a. , 2b denote horizontally movable V-block-shaped slide tables that support the vicinity of the terminal connection portions 3a, 3b of the resin mandrels 1a, 1b. On the slide tables 2a, 2b, the slide table 2a is provided. , 2b, clamp cylinders 5a, 5b, which are equipped with clamp members 4a, 4b having V-shaped clamp grooves (not shown), are vertically arranged. These are resin mandrels 1a, 1b. The clamping means 6a and 6b are constructed.

Between the clamping means 6a, 6b, there is provided a heating and melting means 7 which abuts the terminal connecting portions 3a, 3b of the resin mandrels 1a, 1b and linearly connects them in a molten state. As shown in FIG. 2, 7 is a split mold 8a, 8b which covers the outer peripheral surface of the terminal connection portion of the resin mandrels 1a, 1b, and the split molds 8a, 8b which are detachably held and which are molded respectively. It is composed of openable and closable mold frames 11a and 11b provided with heating means 9 of 8a and 8b and cooling means 10, and 12 is an opening / closing cylinder.

A cartridge heater that heats the split molds 8a and 8b to about 300 ° C. is used as the heating means 9 embedded in the mold frames 11a and 11b, and the cooling means 10 has a cooling inside. It is composed of a cold water pipe 10a for circulating water and the like. This cooling means 10 is a means for abutting the terminal connecting portions of the resin mandrels 1a and 1b, connecting them linearly in a molten state, and then forcibly cooling them. The two split molds 8a and 8b are replaceable according to the outer diameters of the resin mandrels 1a and 1b. At least the connecting end faces of the resin mandrels 1a and 1b are abutted, and the outer peripheral surface is covered. Has a width.

Next, a method of connecting the terminal portions of the resin mandrels 1a and 1b will be described. First, the split molds 8a and 8b corresponding to the outer diameters of the resin mandrels 1a and 1b are set on the mold frames 11a and 11b of the heating and melting means 7 in an open state, and then the cut resin mandrels 1a and 1b are cut. The terminal connection part of is clamped and fixed by the slide tables 2a and 2b of the clamp means 6a and 6b arranged on both sides of the heating and melting means 7 and the clamp members 4a and 4b attached to the clamp cylinders 5a and 5b. .. At this time, the resin mandrels 1a and 1b are arranged so that the terminal connection surfaces of the resin mandrels 1a and 1b contact each other.

From such a state, the mold frames 11a and 11b in which the split molds 8a and 8b are set are closed via the opening / closing cylinder 12 so that the outer peripheral surfaces of the terminal connecting portions 3a and 3b of the resin mandrels 1a and 1b are sandwiched. It is covered and heated by the heating means 9 embedded in the mold frames 11a and 11b for a certain period of time. Although it is necessary to set the heating time depending on the type of the resin of the mandrel, it is generally 15 to 60 seconds for thermoplastic resin.

After the elapse of the set time, the heating by the heating means 9 is stopped, and at the same time, the slide tables 2a, 2b on the left and right of the clamping means 6a, 6b are moved to the heating means 9 side to melt the resin mandrels 1a, 1b. The terminals are butted and pressed. Under this pressure, cooling is performed by the cooling means 10 incorporated in the mold frames 11a and 11b, but it is also possible to force cold water to flow through the cold water pipe 10a as necessary. ..

After the cooling of the terminal connecting portions of the resin mandrels 1a and 1b is completed, the mold frames 11a and 11b in which the split molds 8a and 8b of the heating and melting means 7 are set are opened, and the clamp means 6a and 6b are clamped. After that, the resin mandrels 1a and 1b that have been connected are removed and the work is completed. Thus, in a state where the connection end faces of the resin mandrels 1a and 1b are butted against each other, the outer peripheral surfaces thereof are covered with the split molds 8a and 8b, and the connection end faces of the resin mandrels 1a and 1b are melted by the heating and melting means 7. Butt and crimp, and by cooling and solidifying in the split molds 8a and 8b in the crimped state, the joint between the resin mandrels 1a and 1b is always linear, and since the resin flow is small, the flow portion It is also possible to omit the finishing work such as scraping off with a knife or the like.

[0015]

[Effect of the device]

 In this invention, as described above, the heating / melting means is provided with a split mold for covering the outer peripheral surface of the terminal connection portion of the resin mandrel, and the split mold is detachably held, and the open / close is provided with the heating means for the mold. Since it is composed of a mold frame that can be used, there is no step at the joint of the resin mandrel, and it can always be connected linearly and with good accuracy. It is also possible to omit finishing work such as scraping off with a scalpel, etc., which has the effect of significantly improving workability and productivity.

[Brief description of drawings]

FIG. 1 is a front view of a resin mandrel connection device embodying the present invention.

FIG. 2 is an enlarged sectional view taken along the line AA of FIG.

[Explanation of symbols]

1a, 1b Resin mandrel 2a, 2b Slide table 3a, 3b Terminal connection part 4a, 4b Clamp member 5a, 5b Clamp cylinder 6a, 6b Clamping means 7 Heating and melting means 8a, 8b Split mold 9 Heating means 10 Cooling means 11a, 11b Mold flame

Claims (2)

[Scope of utility model registration request] 1. A terminal portion of a resin mandrel is clamped by horizontally movable clamping means, and the terminal portion of the resin mandrel is abutted and connected while being melted by a heating and melting means. In the resin mandrel connecting device, the heating / melting means covers the outer peripheral surface of the terminal connecting portion of the resin mandrel, and the divided molds are detachably held and can be opened / closed with a heating means for the mold. A connection device for resin mandrels, which is composed of a simple mold frame. 2. The resin mandrel connecting device according to claim 1, wherein the mold frame is provided with heating means for heating the entire mold and cooling means inside thereof.