Post-welding rapid local heat treatment device for surfacing repair of plastic mold

Abstract

The utility model discloses a post-welding rapid local heat treatment device for surfacing repair of a plastic mold. The post-welding rapid local heat treatment device comprises fire-resistant asbestos, heat-resistant stainless steel balls, an induction heater, an induction heating coil, a temperature thermocouple and a temperature controller. The heat-resistant stainless steel balls are rapidly heated through the induction heating coil, and then the surfacing repair layer of the plastic mold is heated through heat conduction of the heated heat-resistant stainless steel balls, so that rapid local heat treatment after surfacing repair is achieved. The rapid local heat treatment device disclosed by the utility model is simple in structure and convenient to arrange, and can realize rapid heating of the surfacing part of the die.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of rapid local heat treatment device, in particular to a kind of plastic mould surfacing repair postweld heat treatment device. BACKGROUND

[0002] When serving, plastic mould forms specific lines on the surface of injection molding product, and it is usually needed to etch the surface before serving, to obtain consistent etching effect, it requires that plastic mould has uniform microstructure. However, in actual production, plastic mould machining is often out of tolerance, and bumping or wear occurs during transportation or service, resulting in that the size of mould is out of tolerance and cannot be used normally. The cost of a pair of medium-sized mould is as high as several million yuan, so in actual production, plastic mould that cannot be used normally often needs to be repaired.

[0003] Laser welding and argon arc welding surfacing process have been widely used for local repair of plastic mould. However, during the surfacing repair process of plastic mould, due to the large size of plastic mould, when the surfacing weld cools, the plastic mould itself is equivalent to an infinite cold body, which makes the cooling speed of molten weld metal very fast, thereby forming ultra-fine grain martensite structure. This microstructure is obviously different from the original microstructure of plastic mould, so that consistent lines cannot be obtained during etching, which seriously affects the surface quality of injection molded product. In the prior art, the problem that the microstructure of heat affected zone and weld of surfacing repaired mould is significantly different from the microstructure of plastic mould body has not been effectively solved. Patent CN116213887A discloses an argon arc welding repair method for 1.2738 steel plastic mould, and in the heat treatment method, resistance heating wire is used for heating, and quartz sand is used for heat transfer and heat preservation, which has the disadvantages of slow heating and slow heat conduction, and cannot meet the needs of actual production. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of plastic mould surfacing repair postweld heat treatment device.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] A kind of plastic mould surfacing repair postweld heat treatment device, the device includes fire-resistant asbestos one, heat-resistant stainless steel bead, induction heater, induction heating coil, temperature measuring thermocouple and temperature controller;Wherein, fire-resistant asbestos one encloses the plastic mould surfacing area needing heat treatment, heat-resistant stainless steel bead is filled in the area enclosed by fire-resistant asbestos one, the bottom of the heat-resistant stainless steel bead is placed temperature measuring thermocouple, the top is placed fire-resistant asbestos two, induction heating coil is arranged above fire-resistant asbestos two, induction heating coil is connected with induction heater, temperature measuring thermocouple and induction heater are connected with temperature controller.

[0007] The thickness of the accumulated heat-resistant stainless steel beads is 3-20 cm; the diameter of the heat-resistant stainless steel beads is 2-6 mm; the area surrounded by the refractory asbestos is the surfacing repair area and the surrounding 2 cm range; the thickness of the refractory asbestos one and the refractory asbestos two is 0.3-1 cm.

[0008] The effect of the plastic mold surfacing repair post-welding rapid local heat treatment device is as follows: (1) induction heating can realize rapid heating of the mold locally; (2) the heat-resistant stainless steel is used as a direct heating object and is used for heat conduction, which can not only realize rapid heat conduction, but also can avoid oxidation of the steel beads, and through the feedback of the temperature measuring thermocouple, the temperature of the surfacing part of the mold can be effectively controlled; (3) the whole rapid local heat treatment device has simple structure and convenient arrangement, and can adapt to molds of various complex shapes and curved surfaces. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 It is a schematic view of the plastic mold surfacing repair post-welding rapid local heat treatment device in the utility model.

[0010] The utility model will be further described in combination with examples. DETAILED DESCRIPTION

[0011] Example 1

[0012] A plastic mold surfacing repair post-welding rapid local heat treatment device, the device includes refractory asbestos 1, heat-resistant stainless steel beads 2, induction heater 6, induction heating coil 5, temperature measuring thermocouple 3 and temperature controller 7, wherein the refractory asbestos one 1 surrounds the plastic mold surfacing area needing heat treatment, the heat-resistant stainless steel beads 2 are filled in the area surrounded by the refractory asbestos one 1, the bottom of the heat-resistant stainless steel beads is placed with the temperature measuring thermocouple 3, the top is placed with the refractory asbestos two 4, the induction heating coil 5 is arranged above the refractory asbestos two 4, the induction heating coil 5 is connected with the induction heater 6 by wire, and the temperature measuring thermocouple and the induction heater 6 are connected with the temperature controller 7 by wire. The thickness of the accumulated heat-resistant stainless steel beads is 3 cm; the diameter of the heat-resistant stainless steel beads is 4 mm; the area surrounded by the refractory asbestos 1 is the surfacing repair area and the surrounding 2 cm range; the thickness of the refractory asbestos 1 is 1 cm.

[0013] Example 2

[0014] The device comprises fire-resistant asbestos 1, fire-resistant asbestos 4, heat-resistant stainless steel beads 2, an induction heater 6, an induction heating coil 5, a temperature measuring thermocouple 3 and a temperature controller 7. The fire-resistant asbestos 1 encloses the area of the plastic mold that needs to be heat treated, the heat-resistant stainless steel beads 2 are filled in the area enclosed by the fire-resistant asbestos 1, the bottom of the heat-resistant stainless steel beads is placed with the temperature measuring thermocouple 3, the top is placed with the fire-resistant asbestos 4, the induction heating coil 5 is arranged above the fire-resistant asbestos 4, the induction heating coil 5 is connected with the induction heater 6, and the temperature measuring thermocouple 3 and the induction heater 6 are connected with the temperature controller 7 through wires. The thickness of the heat-resistant stainless steel beads is 20 cm, the diameter of the heat-resistant stainless steel beads is 2 mm, the area enclosed by the fire-resistant asbestos 1 is the area of the repair welding and the surrounding 2 cm, and the thickness of the fire-resistant asbestos 4 is 0.3 cm.

[0015] Example 3

[0016] The device comprises fire-resistant asbestos 1, fire-resistant asbestos 4, heat-resistant stainless steel beads, an induction heater, an induction heating coil, a temperature measuring thermocouple and a temperature controller. The fire-resistant asbestos 1 encloses the area of the plastic mold that needs to be heat treated, the heat-resistant stainless steel beads 2 are filled in the area enclosed by the fire-resistant asbestos 1, the bottom of the heat-resistant stainless steel beads is placed with the temperature measuring thermocouple 3, the top is placed with the fire-resistant asbestos 4, the induction heating coil 5 is arranged above the fire-resistant asbestos 4, the induction heating coil 5 is connected with the induction heater 6, and the temperature measuring thermocouple and the induction heater 6 are connected with the temperature controller 7. The thickness of the heat-resistant stainless steel beads is 8 cm, the diameter of the heat-resistant stainless steel beads is 6 mm, the area enclosed by the fire-resistant asbestos 1 is the area of the repair welding and the surrounding 2 cm, and the thickness of the fire-resistant asbestos 4 is 0.5 cm.

Claims

1. A device for rapid localized heat treatment after welding for repair welding of plastic molds, characterized by, Fireproof asbestos one (1) will need to heat the plastic mold area around the welding, heat-resistant stainless steel beads (2) filled in the area surrounded by fireproof asbestos one (1), the bottom of the heat-resistant stainless steel beads placed temperature measuring thermocouple (3), the top of the heat-resistant stainless steel beads placed fireproof asbestos two (4), fireproof asbestos two (4) above the setting induction heating coil (5), induction heating coil (5) and induction heater (6) connected by wire, temperature measuring thermocouple and induction heater (6) connected to the temperature controller (7).

2. The device for rapid local heat treatment after welding of a plastic mold repair welding according to claim 1, characterized in that: The thickness of the heat-resistant stainless steel beads (2) is 3-20 cm.

3. The device for rapid local heat treatment after welding of a plastic mold repair welding according to claim 1, characterized in that: The diameter of the heat-resistant stainless steel beads (2) is 2-6 mm.

4. The apparatus for rapid localized heat treatment of a plastic mold hardfacing repair after welding according to claim 1, characterized in that: The area surrounded by fireproof asbestos one (1) is the welding repair area and the surrounding 2 cm range.

5. The apparatus for rapid localized heat treatment of a plastic mold hardfacing repair after welding according to claim 1, characterized in that: The thickness of the fireproof asbestos two (4) is 0.3-1 cm.

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