Reducing-proof hot melting device for polypropylene pipeline hot melting welding

Abstract

The utility model relates to the field of polypropylene pipe processing and application, in particular to an anti-shrinkage hot melting device for hot melting welding of a polypropylene pipeline, which comprises a heating ironing plate, a male die and a female die, the male die and the female die are respectively fixed on two sides of the heating ironing plate, a groove is arranged on the inner bottom surface of the female die, and the male die and the female die are fixed on the heating ironing plate. The outer edge face of the groove abuts against the end face of a pipe entering the female die in a limiting mode, a heat insulation gasket is fixed in the groove, through holes are formed in the periphery of the side wall of the bottom of the female die, and the through holes are specifically located above the outer edge face of the groove and correspond to the end of the pipe abutting against the through holes. According to the hot melting device, the heat insulation gasket and the through hole are designed at the position of the female die, the heat insulation gasket is used for conducting heat insulation treatment on a pipe, heated polypropylene can not flow into the inner diameter of the pipe, redundant melt is extruded out of the through hole through the through hole, the inner flanging amount is effectively reduced, and therefore the pipe is prevented from being shrunk.

Description

Technical Field

[0001] The utility model relates to the field of polypropylene pipe processing applications, and particularly relates to a shrinkage-preventing hot melt welder for hot melt welding of polypropylene pipes. Background Art

[0002] When polypropylene pipes are hot melted using existing hot melt welders, if the time is too long or the heating temperature is too high, the socket of the hot melt welding of the pipes will show a shrinkage phenomenon, which will seriously affect the pipeline flow. Content of the Utility Model

[0003] In order to solve the above technical problems existing in the prior art, the utility model provides a shrinkage-preventing hot melt welder for hot melt welding of polypropylene pipes, and the specific technical solution is as follows:

[0004] A shrinkage-preventing hot melt welder for hot melt welding of polypropylene pipes, comprising: a heating hot plate, a male mold and a female mold. The male mold and the female mold are respectively fixed on both sides of the heating hot plate. A groove is formed on the inner bottom surface of the female mold, and the outer edge surface of the groove is in limit abutment with the end surface of the pipe entering the female mold. A heat insulation gasket is fixed in the groove, and through holes are formed around the side wall at the bottom of the female mold. The through holes are specifically located above the outer edge surface of the groove and correspond to the end of the pipe in abutment.

[0005] Further, the diameter of the groove is 80% - 85% of the diameter of the pipe to be hot melted.

[0006] Further, the heat insulation gasket is made of carbonized wood material.

[0007] Further, the central axes of the male mold, the female mold and the heat insulation gasket are on the same straight line.

[0008] Further, the heating hot plate, the male mold, the female mold and the heat insulation gasket are fixed simultaneously by the same bolt.

[0009] The hot melt welder of the utility model only makes changes at the female mold, and designs a heat insulation gasket and through holes therein. The heat insulation gasket is used to insulate the pipe, so that the heated polypropylene will not flow into the inner diameter of the pipe. The excess molten material is extruded from the through holes, effectively reducing the amount of internal flanging, thereby preventing the pipe from shrinking. Description of the Drawings

[0010] Figure 1 is an exploded structural schematic diagram of a shrinkage-preventing hot melt welder for hot melt welding of polypropylene pipes in this embodiment;

[0011] Figure 2 is a structural schematic diagram of the female mold in this embodiment;

[0012] In the figure, 1 is a heating ironing plate, 2 is a male mold, 3 is a female mold, 4 is a heat insulation gasket, and 5 is a bolt. Detailed implementation mode

[0013] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0014] As Figure 1 shown, this embodiment discloses a shrinkage-preventing hot melt welder for hot melt welding of polypropylene pipes, including: a heating ironing plate 1, a male mold 2 and a female mold 3. The male mold 2 and the female mold 3 are respectively fixed on both sides of the heating ironing plate 1. The male mold 2 is used to hot melt the end of the pipe to form a socket at its end, and the female mold 3 is used to hot melt the end of the pipe to form a spigot at its end.

[0015] As Figure 2 shown, a groove is opened on the inner bottom surface of the female mold 3, and the diameter of the groove is 80% to 85% of the diameter of the pipe to be hot melted. After the end of the pipe enters the female mold 3, its end face is limited and abuts against the outer edge surface of the groove, that is, the outer edge surface of the groove is the limiting surface of the female mold 3.

[0016] A heat insulation gasket 4 made of carbonized wood material is fixed in the groove. Using the heat insulation gasket 4 to insulate the pipe can prevent the heated polypropylene from flowing into the inner diameter of the pipe, reduce the amount of inner flanging, and thus prevent the pipe from shrinking in diameter.

[0017] Through holes are opened around the side wall at the bottom of the female mold 3. The through holes are specifically located above the outer edge surface of the groove and correspond to the end of the pipe in contact therewith, and are used to extrude the molten material with too long hot melt time and the redundant molten material caused by simultaneous extrusion from the through holes, so as to further reduce the amount of inner flanging and prevent the pipe from shrinking in diameter.

[0018] The central axes of the male mold 2, the female mold 3, and the heat insulation gasket 4 are located on the same straight line, and are fixed simultaneously by a bolt 5.

[0019] When the hot melt welder of the present invention is used, after the heating ironing plate 1 is powered on, the male mold 2 and the female mold 3 on both sides are heated to the required welding temperature. Then, the two pipes are respectively heated and melted at the male mold 2 and the female mold 3. The pipe heated at the female mold 3 is pressed and abutted against the limiting surface. Due to the action of the heat insulation gasket 4, the inner diameter of the pipe in this mold is not easily melted, while the molten polypropylene on the outer diameter surface can be extruded from the through hole and will not stagnate at the pipe orifice, so as to maintain the size and cleanliness of the inner diameter of the pipe and prevent the pipe from shrinking during hot melting.

[0020] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly. In the present utility model, unless otherwise clearly specified and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0021] The above is only the preferred embodiment of the present utility model, and does not impose any form of limitation on the present utility model. Although the implementation process of the present utility model has been described in detail above, for those familiar with the field, they can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacements for some of the technical features. Any modifications, equivalent replacements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A shrinkage-preventing hot melt welder for polypropylene pipes, comprising: A heating ironing plate (1), a male die (2) and a female die (3), the male die (2) and the female die (3) are respectively fixed on both sides of the heating ironing plate (1), and it is characterized in that a groove is formed in the inner bottom surface of the female die (3), the outer edge surface of the groove is in limiting abutment with the end surface of the pipe entering the female die (3), a heat insulation gasket (4) is fixed in the groove, through holes are formed around the bottom side wall of the female die (3), and the through holes are specifically located above the outer edge surface of the groove and correspond to the end of the pipe in abutment therewith.

2. The hot melt device according to claim 1, characterized in that, The diameter of the groove is 80% - 85% of the diameter of the hot-melt pipe required.

3. The hot melt device according to claim 1, characterized in that, The heat insulation gasket (4) is made of carbonized wood material.

4. The hot melt applicator according to claim 1, characterized in that, The central axes of the male die (2), the female die (3) and the heat insulation gasket (4) are located on the same straight line.

5. The hot melt applicator according to claim 1, characterized in that, The heating ironing plate (1), the male die (2), the female die (3) and the heat insulation gasket (4) are fixed simultaneously by the same bolt (5).

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