CN213108074U

CN213108074U - Electric heating device for injection mold

Info

Publication number: CN213108074U
Application number: CN202021972471.6U
Authority: CN
Inventors: 李海梅; 郝明亮; 杨北京
Original assignee: Zhengzhou University
Current assignee: Zhengzhou University
Priority date: 2020-09-10
Filing date: 2020-09-10
Publication date: 2021-05-04
Anticipated expiration: 2030-09-10

Abstract

The utility model provides an electric heating device for injection mold, belong to injection mold's control by temperature change technique, including the die cavity board, one side of die cavity board is the die cavity, the opposite side is the heating side, the heating side of die cavity board is provided with general piece, general piece includes at least one heating unit, the heating unit is the cuboid structure, open at the center of its two relative faces has communicating through-hole, be provided with the heating rod in the through-hole, general piece still includes auxiliary unit, auxiliary unit is solid cuboid structure, general piece is formed by heating unit and auxiliary unit concatenation, the heating unit all sets up the one side of pasting nearly die cavity board at general piece. The utility model discloses novel structure, think about ingenious, the processing cost is low, maintains simply, convenient to use, and adaptability is wide, and rate of heating is fast, and temperature distribution is even, and the effect is showing.

Description

Electric heating device for injection mold

Technical Field

The utility model belongs to the technical field of injection mold's control by temperature change, concretely relates to combination formula device for heating of shaping engineering material.

Background

Traditional injection mold is in the forming process, because the mould temperature is lower, the part that the plastics fuse-element contacted the mould earlier in the process of moulding plastics cools down rapidly, too early condensation, make the fuse-element mobility poor, lead to the surface quality defects such as weld mark, flow line to appear in the goods, even the bubble fails the goods internal quality defect that in time the evacuation leads to, the product of surface quality defect need just calculate qualified through secondary treatment such as polishing, internal quality defect then directly becomes the substandard product, the manpower has so not only been wasted, the environment is polluted, the yields has been reduced, resources have been wasted. This problem is significantly solved if the mold can be heated in advance before filling, and thus heating the mold before filling is particularly important and has received much attention.

In the current mold heating process technology, the improved problems can be solved, but some defects still exist. The existing mold heating processes comprise water bath heating, coil induction heating and heating rod heating. When the hot water is used for heating the mold, the temperature is slowly increased, the molding cycle is seriously influenced, and the production efficiency is reduced; when the die is heated by induction, the die cavity can only be in a nearly planar structure, and the temperature distribution is not uniform; when the heating rod heats, because all heating rods use constant power, the different structures of the cavity plate still can not achieve the effect of uniform temperature distribution, the problem of surface defects of products still can occur, and the mold needs to be perforated, so that the processing cost is high.

Therefore, a process scheme with low processing cost, high heating speed and uniform temperature distribution is urgently needed in the industry to meet the market demand.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects of the prior art, the utility model provides an electric heating device for injection mold carries out quick even heating to injection mold.

The to-be-solved technical problem of the utility model is realized through following technical scheme:

the utility model provides an electric heating device for injection mold, includes the die cavity board, and one side of die cavity board is the die cavity, and the opposite side is the heating side the utility model discloses in, the heating side of die cavity board is provided with general piece, and general piece includes at least one heating unit, and the heating unit is the cuboid structure, and open at the center of its two relative faces has communicating through-hole, is provided with the heating rod in the through-hole, and general piece still includes auxiliary unit, and auxiliary unit is solid cuboid structure, and general piece is formed by heating unit and auxiliary unit concatenation, and the heating unit all sets up the one side of pasting nearly die cavity board at general piece.

The utility model discloses in, heating element's cross section is the rectangle, and the heating rod passes the through-hole and runs through heating element's cross section perpendicularly, and auxiliary unit's cross section is the rectangle, and is unanimous with the heating element size.

Furthermore, the universal piece is formed by 1-4 combination splicing of heating units and auxiliary units, wherein the number of the heating units is 1-3, the number of the auxiliary units is 0-2, and the universal piece selects the heating units and the auxiliary units to match with different specifications according to actual requirements.

Furthermore, the heating unit and the auxiliary unit of the universal piece are of an integrated structure.

The utility model discloses in, the heating rod includes electric heating wire and body, and electric heating wire sets up in the body, packs the insulating filler of heat conduction in the body, and the body opening is provided with joint sealant and heat insulating sheet, and the heating rod passes through clearance fit and installs in heating unit's through-hole, and the heating rod external diameter is less than the through-hole internal diameter by 0.2 mm.

Furthermore, the heating rod is a single-end wiring heating rod, one end of the tube body is closed, the other end of the tube body is a wiring end, and the wiring end is sealed through sealing glue and a heat insulation sheet.

The utility model discloses in, the heating side cutting of die cavity board is fluted, is provided with one or more general parts in the recess, and the inboard at the recess is fixed through modes such as riveting, spiro union, sticky to general part, and the same or different specification is selected according to actual demand to a plurality of general parts, still is provided with the supplementary general part of fixed of cooperation piece in the recess.

The utility model discloses in, an electric heater unit for injection mold still includes controlling means, controlling means is connected with every heating rod electricity respectively, controls the input power of heating rod, and controlling means provides electric power by industrial power and supports.

Compared with the prior art, the utility model has the advantages of it is following:

through the design of the universal piece and the heating rod, the universal piece is well matched with the cavity, the cost of the cavity for opening the hole is reduced, and the universal piece is simple to maintain and convenient to use; the universal piece can be spliced into universal pieces with various specifications and basic models through the matching of the heating unit and the auxiliary unit, is suitable for cavities with different structures, and has wide adaptability; the distribution of the heating rods in the universal part can ensure that the distance between the heating rods and the plastic melt in the cavity is consistent, so that the plastic melt is heated uniformly and quickly; the control device uniformly and effectively controls the input power of the heating rod, and inputs different powers aiming at different parts of the cavity, so that the effect of uniform heating is further ensured.

To sum up, the utility model discloses novel structure, the design is ingenious, and processing cost is low, maintains simply, convenient to use, and adaptability is wide, and rate of heating is fast, and temperature distribution is even, and the effect is showing.

Drawings

FIG. 1 is a schematic diagram of the utility model showing various specifications of the universal parts;

FIG. 2 is a schematic view of the overall structure of the present invention;

FIG. 3 is a schematic diagram of the control principle of the present invention;

FIG. 4 is a schematic structural view of a heating rod of the present invention;

FIG. 5 is another schematic structural view of the present invention;

FIG. 6 is a graph of the temperature increase of the mold cavity of FIG. 2;

fig. 7 is a final temperature profile of the mold cavity of fig. 2.

In the figure: the device comprises a cavity plate 1, a universal part 2, a matching block 3, a heating unit 4, an auxiliary unit 5, a heating rod 6, a pipe body 7, an electric heating wire 8, a filler 9, a wiring terminal 10, a heat insulation sheet 11 and a sealant 12; A. b, C, D, E, F, G are the temperature measuring points of the cavity surface.

Detailed Description

The invention will be further described with reference to the drawings and specific preferred embodiments without limiting the scope of the invention.

An electric heating device for an injection mold comprises a cavity plate 1, wherein one side of the cavity plate 1 is a cavity, the other side of the cavity plate 1 is a heating side, a groove is formed in the heating side, a universal part 2 and a matching block 3 are fixed in the groove, a heating rod 6 is arranged in the universal part 2, the heating rod 6 is a single-end wiring heating rod and comprises an electric heating wire 8 and a pipe body 7, the electric heating wire 8 is arranged in the pipe body 7, a heat-conducting insulating filler 9 is filled in the pipe body 7, one end of the pipe body 7 is sealed, the other end of the pipe body 7 is a wiring end 10, and the wiring end 10 is sealed by a sealant 12 and; the utility model discloses still include controlling means, controlling means is connected with 6 electricity of every heating rod respectively, and the input power of control heating rod 6, controlling means provide electric power by industrial electricity and support.

General piece 2 includes heating element 4 and auxiliary unit 5, heating element 4 is the cuboid structure, open at the center of its two relative faces has communicating through-hole, be provided with heating rod 6 in the through-hole, heating element 4's cross section is the rectangle, heating rod 6 passes the through-hole and runs through heating element 4's cross section perpendicularly, auxiliary unit 5's cross section is the rectangle, unanimous with heating element 4 size, heating element 4 all sets up the one side that is close to type chamber board 1 at general piece 2.

The general part 2 is formed by 1-4 combination splices of heating unit 4 and auxiliary unit 5, wherein heating unit has 1-3, and the auxiliary unit has 0-2, and general part 2 in figure 1 shows 6 specifications, respectively: the common part 2 comprises 1 heating unit 4; the universal piece 2 is formed by splicing two heating units 4; the universal piece 2 is spliced into a strip shape by the three heating units 4; the universal piece 2 is spliced into a T shape by three heating units 4 and an auxiliary unit 5; the universal piece 2 is spliced into an angle steel shape by two heating units 4 and an auxiliary unit 5; the universal piece 2 is spliced into an angle steel shape by three heating units 4 and an auxiliary unit 5.

As

embodiment

1, 2 common parts of the first specification and 2 common parts of the second specification in fig. 1 are selected on the heating side of the cavity plate 1 in fig. 2, and the common parts are fixed in the grooves of the cavity plate 1 by the aid of the fitting blocks 3.

In example 2, 2 common members of the sixth specification in fig. 1 were selected on the heating side of the cavity plate 1 in fig. 5.

The utility model discloses when being applied to injection mold, the die cavity board cuts for the recess in one side of die cavity back to, and the inboard at the recess is fixed through modes such as riveting, gluing to general piece 2, and the cooperation piece is supplementary fixed, through adjustment control device, adjusts the heat output of each heating rod 6 of each general piece 2 respectively for the die cavity surface evenly heaies up and keeps.

Taking the cavity plate structure of embodiment 1 as an example, A, B, C, D, E, F, G temperature measurement points are uniformly selected on the cavity surface for temperature detection, the temperature is recorded within the first 30min according to the frequency of one time of 3min, the temperature rise curve diagram (fig. 6) of each temperature measurement point and the final temperature distribution diagram (fig. 7) of each temperature measurement point are established, and comparison is carried out, so that the temperature rise speed and the temperature distribution of each temperature measurement point are uniform.

Therefore, combine above-mentioned structure and working process to discover, an electric heater unit for injection mold novel structure, think about ingenious, the processing cost is low, maintain simple, convenient to use, adaptability is wide, and rate of heating is fast, temperature distribution is even, the effect is showing.

Claims

1. The utility model provides an electric heater unit for injection mold, includes the die cavity board, and one side of die cavity board is the die cavity, and the opposite side is heating side, its characterized in that: the heating side of die cavity board is provided with general piece, and general piece includes at least one heating unit, and the heating unit is the cuboid structure, and open at the center of its two relative faces has communicating through-hole, is provided with the heating rod in the through-hole, and general piece still includes auxiliary unit, and the auxiliary unit is solid cuboid structure, and general piece is formed by heating unit and auxiliary unit concatenation, and the heating unit all sets up the one side of pasting near die cavity board at general piece.

2. An electric heating device for injection molds according to claim 1, characterized in that: the cross section of the heating unit is rectangular, the heating rod penetrates through the through hole to vertically penetrate through the cross section of the heating unit, and the cross section of the auxiliary unit is rectangular and is consistent with the size of the heating unit.

3. An electric heating device for injection molds according to claim 2, characterized in that: the universal piece is formed by 1-4 combination splicing of heating units and auxiliary units, wherein the number of the heating units is 1-3, and the number of the auxiliary units is 0-2.

4. An electric heating device for injection molds according to claim 3, characterized in that: the heating unit and the auxiliary unit of the universal piece are of an integrated structure.

5. An electric heating device for injection molds according to claim 1, characterized in that: the heating rod comprises an electric heating wire and a pipe body, the electric heating wire is arranged in the pipe body, heat-conducting insulating filler is filled in the pipe body, sealing glue and heat-insulating sheets are arranged at an opening of the pipe body, and the heating rod is installed in a through hole of the heating unit in a clearance fit mode.

6. An electric heating device for injection molds according to claim 5, characterized in that: the heating rod is a single-end wiring heating rod, one end of the tube body is closed, the other end of the tube body is a wiring end, and the wiring end is sealed through sealing glue and a heat insulation sheet.

7. An electric heating device for injection molds according to claim 1, characterized in that: the heating side of the cavity plate is cut with a groove, one or more universal parts are arranged in the groove, and the universal parts are fixed on the inner side of the groove.

8. An electric heating device for injection molds according to claim 1, characterized in that: the electric heating device for the injection mold further comprises a control device, and the control device is electrically connected with each heating rod respectively.