CN212400265U

CN212400265U - Injection mold

Info

Publication number: CN212400265U
Application number: CN202020652289.6U
Authority: CN
Inventors: 肖杰
Original assignee: Huizhou Yaoying Precision Technology Co ltd
Current assignee: Huizhou Yaoying Precision Technology Co ltd
Priority date: 2020-04-26
Filing date: 2020-04-26
Publication date: 2021-01-26
Anticipated expiration: 2030-04-26

Abstract

The utility model relates to an injection mold, including injector die board, ejector die board and the portion that adjusts the temperature, the portion that adjusts the temperature includes first portion and the second portion of adjusting the temperature, and first portion of adjusting the temperature forms single continuous passageway that adjusts the temperature in the injector die inboard, and the second portion of adjusting the temperature sets up and forms single continuous passageway that adjusts the temperature in ejector die inboard. This injection mold still includes the first thermal-insulated portion and the thermal-insulated portion of second of cell body structure, thereby first thermal-insulated portion and the relative connection of the thermal-insulated portion notch of second constitute an accommodation space, and injection molding ware mould board and ejector mould board all set up in accommodation space. The first injection molding device mold plate is in contact with the groove bottom surface of the first heat insulation part, and the second ejector mold plate is in contact with the groove bottom surface of the second heat insulation part. The injection mold further comprises a fixed platen and an ejector assembly, the fixed platen is connected with the top end face of the first heat insulation part, and the ejector assembly is connected to the bottom of the second heat insulation part.

Description

Injection mold

Technical Field

The utility model relates to a technical field of moulding plastics, concretely designs an injection mold.

Background

Existing injection mold assemblies are commonly provided with cooling channels through which a quantity of cooling fluid may be passed at a limited rate to reduce potential leakage. In this case, therefore, the cooling method enables rapid production, but the cooling process still needs to be more efficient, for example, for injection molding of complex parts, including thin parts, and for improving productivity, reducing costs, and providing high quality.

To the technical problem that exists among the prior art, the utility model provides an injection mold, this injection mold can optimize the heat exchange between plastic material and the injection mold in order to obtain short cycle time to obtain the productivity ratio of increase, and high-quality moulded plastics product. The utility model provides a pair of injection mold is particularly useful for making thin part.

The term "temperature regulating medium" as used in the present application refers to a fluid selected from a gas or a liquid adapted to convey thermal energy, such as to maintain a selected temperature for a time suitable to exchange thermal energy with at least the injection mold material, thereby heating the injection mold before and/or during injection of the plastic material.

The term "injector mold plate" in the present application is the mold half from which injection of molding material takes place, and thus the term "injector mold plate" is the "injector mold half" and these terms are to be understood as interchangeable.

The "ejector mold plate" recited in the present invention is the mold half from which ejection of the molded part occurs after sufficient curing so that the "ejector mold plate" is the "ejector mold half" and these terms should be understood as interchangeable.

The "ejector mold plate" recited in the present invention is generally referred to as "mold core", and the injection mold plate is referred to as "mold cavity". In order that conventional terminology is not to be construed as limiting the scope of the invention to the arrangement of the core and the cavity, more general terminology is used throughout this application. It will therefore be appreciated that the cavities and/or cores may be in both the injector and ejector mold plates, depending on the advantageous solution that the tool designer finds for a given injection mold in a given injection molding process.

When the injection mold is closed, such that the second mold plate surface is forcibly contacted, the injector mold half and the ejector mold half together define "one or more mold cavities".

SUMMERY OF THE UTILITY MODEL

In order to achieve the above purpose, the utility model adopts the following technical scheme: an injection mold comprising:

an injector mold plate having a first injector mold plate face and an opposing second injector mold plate face, the first injector mold plate face comprising a first mold cavity half of the one or more mold cavities;

an ejector die plate having a first ejector die plate face and an opposing second ejector die plate face, the first ejector die plate face comprising a second die cavity half of the one or more die cavities;

the first injector mold plate face faces the first ejector mold plate face to define one or more mold cavities when the injector mold plate and the ejector mold plate are in intimate contact during injection of the plastic material;

the temperature adjusting part is provided with a first temperature adjusting part and a second temperature adjusting part, the first temperature adjusting part is arranged in the injection molding device mold plate, and the second temperature adjusting part is arranged in the ejector mold plate. The temperature conditioning portion is provided based on the position of one or more mold cavities.

This injection mold still includes the first thermal-insulated portion and the thermal-insulated portion of second of cell body structure, thereby first thermal-insulated portion and the relative connection of the thermal-insulated portion notch of second constitute an accommodation space, and injection molding ware mould board and ejector mould board all set up in accommodation space. The first injection molding device mold plate is in contact with the groove bottom surface of the first heat insulation part, and the second ejector mold plate is in contact with the groove bottom surface of the second heat insulation part. The first heat insulating portion, the second heat insulating portion, the injector mold, and the ejector mold plate constitute an injection molding tool.

The injection mold further includes a stationary platen and an ejector assembly for ejecting the cooled molded part, the injection molding tool being sandwiched between the stationary platen and the ejector assembly. The fixed platen is connected to a top end surface of the first heat insulating portion, and an injection gate is provided on the fixed platen, through which a molten plastic material is injected into the injection molding tool. Be provided with the first hole that runs through on the first heat insulating part, be provided with the second hole that runs through on the injection molding ware mould board, first hole and second hole and the runner axial alignment of moulding plastics to make unobstructed the moulding plastics of melting plastics material.

In one embodiment, an injection gate bushing is disposed on the injection gate.

The temperature adjusting part of the injection mold is of a tubular structure, the temperature adjusting medium flows in the temperature adjusting part, the molten plastic material is introduced into a mold cavity through an injection gate, heat exchange is carried out between the temperature adjusting medium flowing in the temperature adjusting part and the injection material, and the injection mold can be alternately cooled and heated in an injection molding cycle, so that the thermal stress in the mold is reduced.

The temperature control medium circulating in the temperature control section of the injection mold can preferably be an oil, such as mineral oil, but also other fluids can be used as temperature control medium.

The first temperature regulating part of the injection mold forms a single continuous temperature regulating channel in the mold plate of the injection mold, and the second temperature regulating part is arranged in the mold plate of the ejector to form a single continuous temperature regulating channel. The temperature regulating part is close to the mold cavity.

In an embodiment, the first temperature regulating part comprises a first duct, one port of which is a first temperature regulating medium inlet and the other port is a first temperature regulating medium outlet. The first temperature-adjusting medium inlet and the first temperature-adjusting medium outlet are arranged on the outer side of the side wall of the first heat insulation part, the part of the first pipeline penetrating into the injection molding device mould plate from the side wall of the first heat insulation part is of a bent structure, and the path of the part of the first pipeline inside the injection molding device mould plate passes through all the first mould cavity halves.

In an embodiment, the second temperature regulating part comprises a second duct, one port of which is a second temperature regulating medium inlet and the other port is a second temperature regulating medium outlet. The second temperature-adjusting medium inlet and the second temperature-adjusting medium outlet are both arranged on the outer side of the side wall of the second heat insulation part, the part of the second pipeline penetrating into the ejector die plate from the side wall of the second heat insulation part is of a bent structure, and the path of the part of the second pipeline inside the ejector die plate passes through all the second die cavity half parts.

In one embodiment, the first temperature regulating part and the second temperature regulating part are arranged asymmetrically. The portion of the second conduit inside the ejector die plate is routed between the second die cavity halves.

The use of the injection mold comprises the following steps:

(a) connecting the fixed platen, the injection molding tool and the ejector assembly in a matched manner by using a connecting piece;

(b) adjusting the injection molding machine and the ejector molding plate to a first temperature by a temperature adjusting part;

(c) injecting a plastic material having a first temperature into an injection mold to fill one or more molding cavities;

(d) the injection molding device mould plate is adjusted to a second temperature and maintained through the first temperature adjusting part, and meanwhile, the ejector mould plate is adjusted to a third temperature and maintained through the second temperature adjusting part, and the second temperature and the third temperature can be the same or different;

(e) circulating a temperature regulating medium having a fourth temperature within the temperature regulating section to cool at least one or more mold cavities in the filled and closed injection mold to the fourth temperature at which the molded plastic part within the injection mold solidifies;

(f) the injector mold plate is separated from the ejector mold plate to open the injection mold,

(g) ejecting the cured molded plastic part by actuating ejector pins of the ejector assembly;

(h) repeating the cycle of steps (c) - (g) until a desired number of plastic parts are produced.

The utility model has the advantages that: according to the utility model provides an injection mold can make the mould plastic part that has complicated shape and thickness are thinner. Due to the unique design of the tempering section, tempering, i.e. alternating heating and cooling, of the injection mold during an injection cycle enables a number of different cavities of the same injection mold to be controlled in the best possible manner. In this way, the physical properties of the final plastic part are good. Since the heat exchange is much more uniform for each section of the plastic part than with conventional injection molds, the plastic part has good physical properties that are substantially similar across the entire plastic part unit. High productivity and low tool and equipment costs, in particular because the melt can be fed to a heated injection mould, which can be smaller than conventional injection moulds.

Drawings

The figures further illustrate the invention, but the embodiments in the figures do not constitute any limitation of the invention.

Fig. 1 is a front view of an injection mold according to an embodiment of the present invention.

Fig. 2 is a top view of an injection mold according to an embodiment of the present invention.

Fig. 3 is a schematic structural view of an ejector die plate, a second heat insulation portion and an ejector assembly according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of an ejector assembly according to an embodiment of the present invention.

Fig. 5 is a schematic structural view of an injection molding tool according to an embodiment of the present invention.

Fig. 6 is a schematic diagram of a structure of an injection mold plate and an ejector mold plate according to an embodiment of the present invention.

Fig. 7 is an oblique view of an injection mold plate and an ejector mold plate according to an embodiment of the present invention.

Fig. 8 is an oblique view of an injection mold plate and an ejector mold plate according to an embodiment of the present invention.

Fig. 9 is a schematic structural view of a temperature adjustment portion according to an embodiment of the present invention.

Fig. 10 is a bottom view of the temperature adjustment unit according to an embodiment of the present invention.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be mechanically coupled, directly coupled, or indirectly coupled through intervening agents, both internally and/or in any other manner known to those skilled in the art. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

As shown in fig. 1-2, an embodiment of the present invention provides an injection mold, which includes a stationary platen 1, an injection molding tool 2, and an ejector assembly 3. The injection molding tool 2 includes an injector mold plate 21, an ejector mold plate 22, a first thermal shield 23, and a second thermal shield 24. The injector mold plate 2 is disposed inside the first heat insulating portion 23 to constitute a front half of the injection mold, and the first heat insulating portion 23 is connected to the fixed platen 1. The ejector mold plate 22 is disposed inside a second insulating portion 24 constituting an opposite rear half of the injection mold, the second insulating portion 24 being operatively connected to the ejector assembly 3. The fixed platen 1 is provided with a through injection gate 11, the first heat insulating part 23 is provided with a through first hole 231, the injector mold plate 21 is provided with a through second hole 211, and the first hole 231 and the second hole 211 are axially aligned with the injection gate 11.

The injector mold plate 22, the first insulator 23 and the second insulator 24 are fixedly connected by screws through the first mounting holes at the four corners of the first insulator 23, the second mounting holes at the four corners of the second insulator 24, and the corner coupling holes at the four corners of the fixed platen 1, which are aligned, respectively. In this way, it is ensured that the injector mold plate 21 and the ejector mold plate 22 are sufficiently firmly fixed to avoid detachment when subjected to an injection molding cycle and when subjected to forces resulting from the opening and closing of the injection mold, and to ensure leak-proof closing of the injector mold plate 21 and the ejector mold plate 22.

As shown in fig. 3-5, the second thermal insulation portion 24 is connected and fixed with the ejector assembly 3 by a conventional connection means, which is not described herein. After injection molding is complete, the injection molding tool 2 and the ejector assembly 3 are separated and the ejector assembly ejects the solidified plastic part.

The specific structure of the ejector assembly 3 belongs to the technical scope disclosed in the prior art, the ejector assembly 3 comprises a first ejector assembly plate 31, a second ejector assembly plate 32, a rod 33 and an ejector pin 34, and the rod 33 pushes the first ejector assembly plate 31 forward to drive the second ejector assembly plate 32. Pushing the first ejector assembly plate 31 pushes the ejector pins 34 toward the molded part so that the ejector pins 34 can eject the solidified plastic part from the open mold cavities at the tops of the ejector pins 34.

As shown in fig. 6 to 10, the injection mold further includes a temperature adjusting portion, the temperature adjusting portion includes a first temperature adjusting portion and a second temperature adjusting portion, the first temperature adjusting portion penetrates through the sidewall of the first heat insulating portion 23 and then enters the injection molding tool 21 from the top of the injection molding tool 21, and the second temperature adjusting portion penetrates through the sidewall of the second heat insulating portion 24 and then enters the ejector mold plate 22 from the bottom of the ejector mold plate 22.

The first temperature adjustment part includes a first duct 41, the first duct 41 is bent inside the injection molding tool 21 and then passes through the side wall of the first heat insulation part 23, and the first duct 41 includes a first temperature adjustment medium inlet 411 and a first temperature adjustment medium outlet 412. The first conduit 41 is inside the injection molding tool 21 proximate to the first mold cavity half 212, and the portion of the first conduit 41 inside the injector mold plate 21 is routed through all of the first mold cavity halves 212. The second temperature adjusting portion includes a second duct 42, the second duct 42 is bent inside the ejector die plate 22 and then penetrates through the side wall of the second heat insulating portion 24, and the second duct 42 includes a second temperature adjusting medium inlet 421 and a second temperature adjusting medium outlet 422. Second conduit 42 is proximate second mold cavity half 222 inside ejector mold plate 22, and the portion of second conduit 42 inside ejector mold plate 22 is routed through all second mold cavity halves 222.

The first conduit 41 and the second conduit 42 are asymmetrically arranged, and the second conduit 42 increases the path through the portion between the second mold cavity halves 222 as compared to the first conduit 41, the increase in the portion serving to increase the rate of temperature rise of the second mold cavity halves 222 of the ejector die plate 22 during the heating phase, and the cooling phase increasing the rate of cooling of the second mold cavity halves 222, thereby enabling thin-walled parts to be processed.

With the injection mold 1 according to the invention, mold plastic parts with complex shapes and fine details can be produced. Due to the unique design of the tempering channel, the tempering, i.e. the alternating heating and cooling, of the injection mold during an injection cycle can be controlled in the best possible way for many different cavities of the same injection mold. In this way, the physical properties of the final plastic part are good.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An injection mold, its characterized in that:

the temperature adjusting part comprises a first temperature adjusting part and a second temperature adjusting part, the first temperature adjusting part forms a single continuous temperature adjusting channel in the injection mould plate, and the second temperature adjusting part is arranged in the ejector mould plate to form a single continuous temperature adjusting channel;

the injection mold further comprises a first heat insulation part and a second heat insulation part of the groove body structure, notches of the first heat insulation part and the second heat insulation part are oppositely connected to form an accommodating space, the injection mold plate and the ejector mold plate are arranged in the accommodating space, the surface of the first injection mold is in contact with the groove bottom surface of the first heat insulation part, and the surface of the second ejector mold is in contact with the groove bottom surface of the second heat insulation part;

the injection mold further comprises a fixed platen and an ejector assembly, the fixed platen is connected with the top end face of the first heat insulation part, and the ejector assembly is connected to the bottom of the second heat insulation part.

2. An injection mold according to claim 1, characterized in that: be provided with the runner of moulding plastics on the fixed platen, be provided with the first hole that runs through on the first heat-insulating portion, be provided with the second hole that runs through on the injection molding ware mould board, first hole and second hole and the runner axial alignment of moulding plastics.

3. An injection mould according to claim 2, characterized in that: the temperature adjusting part is close to a mold cavity of the injection mold.

4. An injection mold according to claim 3, wherein: the first temperature adjusting part comprises a first pipeline, one port of the first pipeline serves as a first temperature adjusting medium inlet, the other port serves as a first temperature adjusting medium outlet, the first temperature adjusting medium inlet and the first temperature adjusting medium outlet are arranged on the outer side of the side wall of the first heat insulation part, the first pipeline is of a bent structure in the portion, penetrating into the injection molding device mold plate, of the side wall of the first heat insulation part, and the path of the first pipeline in the portion, inside the injection molding device mold plate, of the first pipeline passes through all the first mold cavity halves.

5. An injection mold according to claim 4, wherein: the second temperature adjusting part comprises a second pipeline, one port of the second pipeline is used as a second temperature adjusting medium inlet, the other port of the second pipeline is used as a second temperature adjusting medium outlet, the second temperature adjusting medium inlet and the second temperature adjusting medium outlet are both arranged on the outer side of the side wall of the second heat insulating part, the part of the second pipeline penetrating into the ejector die plate from the side wall of the second heat insulating part is of a bent structure, and the path of the part of the second pipeline inside the ejector die plate passes through all second die cavity halves.

6. An injection mold according to claim 5, wherein: the portion of the second conduit inside the ejector die plate is routed between the second die cavity halves.