CN209775326U

CN209775326U - heating pipe for core mold of precoated sand mold

Info

Publication number: CN209775326U
Application number: CN201920152771.0U
Authority: CN
Inventors: 袁堂银
Original assignee: Shandong Jinkai Electric Power Gold Ware Co Ltd
Current assignee: Shandong Jinkai Electric Power Gold Ware Co Ltd
Priority date: 2019-01-29
Filing date: 2019-01-29
Publication date: 2019-12-13
Anticipated expiration: 2029-01-29

Abstract

The utility model discloses a tectorial membrane sand mould heating pipe for mandrel, include last mould, lower mould and loose core, loose core install in go up the mould with the inside of lower mould, just the number of loosing core is one at least, go up mould, lower mould and the inside of loosing core all are provided with heating pipe installation through-hole, just two liang of intercommunication of each other of heating installation through-hole, the internally mounted of installation through-hole has the heating pipe, the internally mounted of heating pipe has the outer tube, the inside of outer tube is provided with the heating cavity, the internally mounted of heating cavity has the inner tube, the internally mounted of inner tube has the electric seal wire, the surface winding of inner tube has nickel-chromium alloy resistance wire, the electrode is installed to the one end of electric seal wire, connecting wire is installed to. The utility model discloses a set up a series of structures and make this device have in the use that the heating is effectual, be convenient for characteristics such as installation and change.

Description

Heating pipe for core mold of precoated sand mold

Technical Field

The utility model relates to a mould firing equipment technical field specifically is a tectorial membrane sand mould heating pipe for mandrel.

Background

The mould heating generally adopts the hot-press forming method to carry on the back moulding, the hot-press forming is a simple, common processing method in the plastic processing industry, mainly utilize heat processing mould, inject the sample, fix the model on the hot plate with the pressure, control the melting temperature and time of the sample, so as to harden, cool after melting, take out the model finished product, the hot-press forming can also be divided into the vacuum forming sometimes, with compression forming, its way of exerting pressure is different.

However, in the existing hot-pressing heating device for the mold, an upper mold and a lower mold are adopted to be provided with heating pipes for heating, a sand mold core mold is coated, the heating pipes are only arranged on the upper mold and the lower mold, the curing time of a forming pressing mold is long, and the working efficiency is low; when the solidification of the outer surface of the sand core is finished, the inner of the sand core is still in a slag shape and is not compact; if the pressing time is increased, the phenomenon of external scorching and internal scorching occurs; psammitolite defect is many, and foundry goods appearance defect is just many, influences casting quality, can produce the foundry goods processing for next process simultaneously and bring the difficulty, has further reduced production efficiency, has increased manufacturing cost, so appear loosing core inside and add the heating pipe, but loosing core inside and add the heating pipe, because the thickness of loosing core itself, the heat conduction efficiency is low when having led to the heating, in addition long-time the use, leads to the life-span loss piece of heating pipe, inconvenient change and installation.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a tectorial membrane sand mould heating pipe for mandrel to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a tectorial membrane sand mould heating pipe for mandrel, includes mould, lower mould and looses core, loose core install in go up the mould with the inside of lower mould, just the number of loosing core is one at least, it all is provided with heating pipe installation through-hole to go up mould, lower mould and the inside of loosing core, just two liang of intercommunication of each other of heating installation through-hole, the internally mounted of installation through-hole has the heating pipe, the internally mounted of heating pipe has the outer tube, the inside of outer tube is provided with the heating cavity, the internally mounted of heating cavity has the inner tube, the internally mounted of inner tube has the electric seal wire, the surface winding of inner tube has the nichrome resistance wire, the electrode is installed to the one end of electric seal wire.

Preferably, a heat conducting sleeve is sleeved on the surface of the heating pipe.

Preferably, an asbestos heat insulating mat is filled in an axial gap formed between the end of the inner pipe and the end of the outer pipe.

Preferably, both sides of one end of the core pulling are provided with screw fixing slotted holes, and one end of the core pulling is fixedly provided with a core opening fixing iron sheet through screws and the screw fixing slotted holes.

Preferably, the pipe diameter of the outer pipe close to the pipe orifice is smaller than the pipe diameters of the rest positions of the outer pipe.

Preferably, the upper die and the lower die are internally provided with four heating pipe mounting through holes, and the core pulling part is internally provided with at least one heating pipe mounting through hole.

Compared with the prior art, the beneficial effects of the utility model are that:

1. The utility model discloses an internally mounted at the loose core has two heating pipes, makes this device heat when heating evenly to and be provided with the inner tube in the inside of heating pipe, the surface winding of inner tube has the nichrome resistance wire, the nichrome resistance wire has higher resistivity, surface oxidation resistance is good, thermal emissivity is high and characteristics such as anticorrosive, makes the work efficiency of this device heating pipe high, long service life, through being provided with core mouth fixed iron sheet, only need through the screw with core mouth fixed iron sheet with its fixed can, make this device be convenient for installation and change;

2. The utility model discloses the while still is filled with the asbestos heat insulating mattress in the axial clearance that forms between the end of inner tube and the end of outer tube, prevents that this axial clearance space undersize, too late heat transfer leads to the outer tube to be heated inhomogeneously, through having cup jointed the heat conduction sleeve pipe in the outside of outer tube, is convenient for distribute away the heat that the heating pipe produced evenly for it is even to loose core to be heated, through setting up electric seal wire, electrode and connecting wire, only needs to connect wire connecting power supply and can begin to heat.

Drawings

Fig. 1 is a schematic overall structure diagram of the present invention;

Fig. 2 is an internal cross-sectional view of a heating tube of the present invention;

Fig. 3 is a cross-sectional view of the inside of the core puller of the present invention.

In the figure: 1. an upper die; 2. a lower die; 3. core pulling; 4. connecting a lead; 5. a screw; 6. fixing iron sheets at the core openings; 7. a heating pipe mounting through hole; 8. an electrode; 9. an electrical guide wire; 10. heating the cavity; 11. an outer tube; 12. a screw fixing slot hole; 13. an asbestos insulation mat; 14. a nickel-chromium alloy resistance wire; 15. an inner tube; 16. a heat conducting sleeve; 17. heating the tube.

Detailed Description

the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: the utility model provides a tectorial membrane sand heating pipe for mould mandrel, include last mould 1, lower mould 2 and 3 of loosing core, 3 of loosing core install in last mould 1 with the inside of lower mould 2, and the number of 3 of loosing core is one at least, it all is provided with heating pipe installation through-hole 7 to go up mould 1, the inside of lower mould 2 and 3 of loosing core, and two liang of intercommunication each other of heating pipe installation through-hole 7, the internally mounted of installation through-hole 7 has heating pipe 17, the internally mounted of heating pipe 17 has outer tube 11, the inside of outer tube 11 is provided with heating cavity 10, the internally mounted of heating cavity 10 has inner tube 15, the internally mounted of inner tube 15 has electric seal wire 9, the surface winding of inner tube 15 has nickel chromium alloy resistance wire 14, electrode 8 is installed to electric.

Preferably, the surface of the heating pipe 17 is sleeved with the heat conducting sleeve 16, so that the heat inside the heating pipe 17 is conducted quickly and uniformly.

Preferably, an asbestos heat insulating mat 13 is filled in an axial gap formed between the end of the inner tube 15 and the end of the outer tube 11, so as to prevent the outer tube 11 from being heated unevenly due to too small an axial gap space and late heat transfer.

Preferably, both sides of one end of the core pulling 3 are provided with screw fixing slotted holes 12, and one end of the core pulling 3 is fixedly provided with a core opening fixing iron sheet 6 through a screw 5 and the screw fixing slotted hole 12, so that the heating pipe 17 is convenient to install and replace.

Preferably, the pipe diameter of the outer pipe 11 near the pipe orifice is smaller than the pipe diameter of the rest positions of the outer pipe 11, so that the electric wire 9 is stably placed in the front end of the outer pipe 11.

Preferably, the inside of going up mould 1 and lower mould 2 all is provided with four heating pipe installation through-holes 7, and the inside of loosing core 3 is provided with at least one heating pipe installation through-hole 7, and heating pipe 17 is all installed to the inside of heating pipe installation through-hole 7, makes this device holistic heating when carrying out the mould heating effectual through installing a plurality of heating pipes 17.

The working principle is as follows: the utility model discloses a through install two heating pipes 17 in the inside of 3 of loosing core, make this device heat when heating evenly, and be provided with inner tube 15 in the inside of heating pipe 17, the surface winding of inner tube 15 has nickel-chromium alloy resistance wire 14, nickel-chromium alloy resistance wire 14 has higher resistivity, surface oxidation resistance is good, thermal emissivity is high and characteristics such as anticorrosive, make the work efficiency of this device heating pipe high, long service life, through being provided with core mouth fixed iron sheet 6, rethread screw 5 with core mouth fixed iron sheet 6 with its fixed can, make this device convenient to install and change; simultaneously still be filled with asbestos heat insulating mattress 13 in the axial clearance that forms between the end of inner tube 15 and the end of outer tube 11, prevent that this axial clearance space undersize, too late heat transfer leads to outer tube 11 to be heated inhomogeneously, through having cup jointed heat conduction sleeve 16 in the outside of outer tube 11, be convenient for distribute away the heat that heating pipe 17 produced evenly, make 3 of loosing core be heated evenly, through setting up electric seal wire 9, electrode 8 and connecting wire 4, only need can begin to heat connecting wire 4 connecting power supply.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. the utility model provides a tectorial membrane sand mould heating pipe for mandrel, includes last mould (1), lower mould (2) and (3) of loosing core, its characterized in that: the loose core (3) is arranged in the upper die (1) and the lower die (2), at least one loose core (3) is arranged, heating pipe installation through holes (7) are arranged inside the upper die (1), the lower die (2) and the loose core (3), the heating installation through holes (7) are communicated with each other in pairs, the heating pipes (17) are installed in the installation through holes (7), an outer tube (11) is arranged in the heating tube (17), a heating cavity (10) is arranged in the outer tube (11), an inner tube (15) is arranged in the heating cavity (10), an electric guide wire (9) is arranged in the inner tube (15), the surface of the inner tube (15) is wound with a nickel-chromium alloy resistance wire (14), one end of the electric guide wire (9) is provided with an electrode (8), and the other end of the electrode (8) is provided with a connecting wire (4).

2. The heating pipe for the precoated sand mold core mold according to claim 1, characterized in that: and a heat-conducting sleeve (16) is sleeved on the surface of the heating pipe (17).

3. The heating pipe for the precoated sand mold core mold according to claim 1, characterized in that: an asbestos heat insulation pad (13) is filled in an axial gap formed between the tail end of the inner pipe (15) and the tail end of the outer pipe (11).

4. The heating pipe for the precoated sand mold core mold according to claim 1, characterized in that: the core pulling device is characterized in that both sides of one end of the core pulling body (3) are provided with screw fixing groove holes (12), and one end of the core pulling body (3) is fixedly provided with a core opening fixing iron sheet (6) through screws (5) and screw fixing groove holes (12).

5. The heating pipe for the precoated sand mold core mold according to claim 1, characterized in that: the pipe diameter of the outer pipe (11) close to the pipe orifice is smaller than the pipe diameters of the rest positions of the outer pipe (11).

6. The heating pipe for the precoated sand mold core mold according to claim 1, characterized in that: the mould (1) and the inside of lower mould (2) all are provided with four heating pipe installation through-holes (7), the inside of loosing core (3) is provided with at least one heating pipe installation through-hole (7).