CN202922925U

CN202922925U - Die

Info

Publication number: CN202922925U
Application number: CN 201220565541
Authority: CN
Inventors: 杨洪华; 李贵晨
Original assignee: XIAMEN TOUCH VIDEO MONITOR Corp
Current assignee: XIAMEN TOUCH VIDEO MONITOR Corp
Priority date: 2012-10-31
Filing date: 2012-10-31
Publication date: 2013-05-08
Anticipated expiration: 2022-10-31

Abstract

The utility model relates to a die which at least comprises an upper die core (1), a lower die core (2) and a heating device (3), wherein the upper die core (1) and the lower die core (2) are matched to form a molding cavity of an injection product; the heating device (3) consists of a heating rod (31), a connection electric wire (34), a temperature detector (32) and a temperature controller (33); the heating rod (31) and the temperature detector (32) are fixedly mounted on one of the die core; the temperature controller (33) is connected with the heating rod (31) through the connection electric wire (34); and the heating rod (31) is reasonably mounted at a position which is close to a runner of the molding cavity of the die, and is used for continuously heating in an injection process, so that temperature balance of the die is realized, and a phenomenon of an injection binding wire can be improved. The die provided by the utility model has the advantages of reasonable structure and uniform heating, and can be used for effectively improving the quality of the surface of the injection product.

Description

A kind of mould

Technical field

The utility model relates to a kind of mould, belongs to mould and makes the machine-shaping technical field, especially relates to a kind of mould structure that improves the injecting products joint line, is specially adapted to the injecting products of touch screen shell class.

Background technology

In present common plastic injection mold design, the ubiquity injecting products easily produces the problem of joint line, reason is to be subjected to the restriction (the face frame class formation than macropore is arranged for example) of product structure, often need to use a plurality of cast gates, more cast gates cause more material junctions of two streams, joint line also just increases thereupon, the product of large-size particularly, and, temperature long due to the Material Flow time descends too much, can cause joint line clearly, have a strong impact on the product appearance quality.

At present the general processing method of industry is to use to wipe away agent and carry out the manual wipping polishing, but easy damaged product appearance surface like this makes it lose original gloss, and the more difficult control of uniformity coefficient, and product quality is very unstable.Although the scheme that adopts hot runner mould moulding or rapid heat cycle forming technique to improve the injecting products joint line is also arranged, but the mould of these two kinds of technical schemes and auxiliary equipment cost are too expensive, and safeguard more complicatedly, be difficult to be applied to the transformation to existing mold, be difficult to be used more widely.

The utility model content

For the deficiencies in the prior art, the utility model provides a kind of rational in infrastructure, homogeneous heating, can effectively improve the injection moulding joint line, improve the mould structure of injecting products surface quality.

For achieving the above object, the utility model is achieved through the following technical solutions:

A kind of mould, at least comprise upper cores and lower die, upper and lower die matches and forms the molding cavity of injecting products, also be provided with a heater on a die therein, this heater comprises that at least one heating rod, that is fixedly mounted on this die is arranged on this die the Temperature Detector with monitor temperature equally, and once the temperature controller that connects electric wire and be connected with heating rod.

Further, the fixed installation position of described heating rod is close in the runner of the molding cavity of mould, and the quantity of hard-wired heating rod is relevant to the quantity of the runner of the molding cavity of mould, specifically: all two runner intersections of mould be at least need to by one or covered by two heating rods at the most and.Because two runner intersections are places that the injection moulding joint line easily produces, therefore need to use heating rod that material is heated, make up the heat that loses when material flows in the runner of molding cavity, in order to avoid material temperature is too low, fuse insufficient and produce the injection moulding joint line, the restriction heating rod is at most the reason of two 2 points, and the one, for the consideration of saving the cost aspect, the 2nd, prevent that material from crossing heating and having a negative impact.

Further, covered by a heating rod in all two runner intersections of mould and.This arrangement form takes full advantage of heat-conduction effect, cover and the prerequisite of all two runner intersections under, heating rod is set every between a runner continuously, and need not all arranging heating rod on runner, arranged that the heat on the runner of heating rod can not arrange from trend the lower adjacent channels transmission of temperature of heating rod, can play better heat effect equally, effectively save die cost.

Further, described Temperature Detector is the infrared thermometry device.The temperature that the infrared thermometry device is measured temperature probe feeds back to temperature controller with the infrared radio aspect, need not cable and connects, and is succinct convenient.

In practice, due to the utility model, heating rod is fixedly mounted near the runner of mould molding cavity and cover and all two runner intersections, and the feedback according to Temperature Detector in injection moulding process is in time adjusted the heating-up temperature of heating rod by temperature controller, continue mold runner is heated, kept mold temperature balanced, material neither can be produced joint line, affect surface quality by the too low product surface that causes of Yin Wendu when the interflow, also can not reduce because excess Temperature causes product surface atomizing, glossiness.The utility model is simple effectively, improvement cost is cheap, be easy to be extended and applied.

Description of drawings

Fig. 1 is certain general display plastic rubber surface frame schematic diagram.

Fig. 2 is die structural upright schematic diagram under the utility model.

Fig. 3 is that under the utility model, die is partly assembled front view.

Fig. 4 is the utility model mold integral side view.

Fig. 5 is that under the utility model, die is partly assembled top view.

In figure, 2. times dies of 1. upper cores, 31. heating rod 32. Temperature Detector 320. temperature probe 33. temperature controllers 34. connect electric wire 4. display plastic rubber surface frame 40. joint line 5. glue-feeders

The specific embodiment

The utility model is described in further detail below in conjunction with accompanying drawing:

Utility model people is through great many of experiments, and find that the reason that the injecting products joint line produces has: 1) die venting is not smooth; 2) the material melt temperature is low; 3) mold temperature is low; 4) injection moulding speed and pressure are less than normal; Etc..And wherein topmost reason is: when during the product injection moulding, material flows in the runner of the molding cavity of mould, relatively low because of mold temperature, the material heat constantly loses, to such an extent as to when fusing in intersection, the too low fusion of material Yin Wendu is insufficient, thereby has produced the injection moulding joint line.According to the characteristics of mould structure, the injection moulding joint line is the easy intersection that results from two runners of mould molding cavity generally.Therefore, the applicant proposes the generation that a kind of improved mould structure is avoided the injection moulding joint line, and is concrete, is to adopt following embodiment to realize:

See also Fig. 1, describe take a general display plastic rubber surface frame 4 as specific embodiment, arrow represents the flow direction of material in the runner of mould molding cavity.This injecting products is the frame series products of middle perforate, size is larger, be provided with altogether four glue-feeders 5, during injection mo(u)lding, because mold temperature is relatively low, to be cooling gradually when the material of fusing flows in the runner of mould molding cavity, the position that easily produces joint line 40 be on the material junction of two streams of two runner intersections on display plastic rubber surface frame 4 four angles substantially.

See also Fig. 2, Fig. 3, Fig. 4, the utility model mould structure shown in Figure 5, at least comprise upper cores 1 and lower die 2, upper and lower die matches and forms the molding cavity of injecting products, and this molding cavity conforms to the shape of above-mentioned general display plastic rubber surface frame 4.A die therein, exemplarily be lower die (2) upper (but being not limited to this) herein, also be provided with a heater 3, this heater 3 comprises the heating rod 31 and Temperature Detector 32 that is fixedly mounted on this die, and once the temperature controller 33 that connects electric wire 34 and be connected with heating rod 31.Because the display plastic rubber surface frame 4 in the present embodiment is the frame-shaped construction that four runners are arranged, therefore as long as arrange near its two relative runners that two heating rods 31 can cover and all runners intersections easily produces joint line 40 positions, the heat that during heating, heating rod 31 produces can not arrange from trend the adjacent channels conduction of heating rod 31, play equally heat effect, more save cost than the die heater of all heating.Temperature Detector 32 can be the infrared thermometry device, it is measured temperature and in the mode of infrared radio signal, the measured temperature value is fed back to temperature controller 33 by temperature probe 320, and operating personnel re-use temperature controller 33 according to the temperature of Display panel and in time adjust the heating-up temperature of heating rod 31.

During concrete the use, heating rod 31 and Temperature Detector 32 are fixedly mounted on lower die 2 relevant positions, with connecting electric wire 34, heating rod 31 are connected with temperature controller 33, after setting heating-up temperature, the upper cores of closing 1 also is fixed on mould on injection machine, just can begin injection moulding.In injection moulding process, Temperature Detector 32 is presented at the temperature signal feedback on temperature controller 33, operating personnel can in time adjust the heating-up temperature of heating rod 31 according to actual conditions serviceability temperature controller 33, so that mould remain on one both only cold only heat appropriate temperature, effectively improve injection moulding joint line phenomenon, improved the surface quality of injecting products.

Although specifically show and introduced the utility model in conjunction with preferred embodiment; but the those skilled in the art should be understood that; within not breaking away from the spirit and scope of the present utility model that appended claims limits; can make a variety of changes the utility model in the form and details, be protection domain of the present utility model.

Claims

1. mould, at least comprise upper cores and lower die, upper and lower die matches and forms the molding cavity of injecting products, it is characterized in that: also be provided with a heater on a die therein, this heater comprises that at least one heating rod, that is fixedly mounted on this die is arranged on this die the Temperature Detector with monitor temperature equally, and once the temperature controller that connects electric wire and be connected with heating rod.

2. a kind of mould according to claim 1, it is characterized in that: the fixed installation position of described heating rod is close in the runner of the molding cavity of mould, and the quantity of hard-wired heating rod is relevant to the quantity of the runner of the molding cavity of mould, specifically: all two runner intersections of mould be at least need to by one or covered by two heating rods at the most and.

3. a kind of mould according to claim 2 is characterized in that: covered by a heating rod in all two runner intersections of mould and.

4. a kind of mould according to claim 1, it is characterized in that: described Temperature Detector is the infrared thermometry device.