CN216182339U

CN216182339U - Continuous injection mold

Info

Publication number: CN216182339U
Application number: CN202122563768.8U
Authority: CN
Inventors: 赵僧文; 李辉平
Original assignee: Pinghu Bajun Mould Manufacturing Co ltd
Current assignee: Pinghu Bajun Mould Manufacturing Co ltd
Priority date: 2021-10-25
Filing date: 2021-10-25
Publication date: 2022-04-05
Anticipated expiration: 2031-10-25

Abstract

The utility model relates to the field of injection molds, in particular to a continuous injection mold, which comprises the following components: the upper die base is internally provided with a sprue, the upper die is internally provided with a through hole, a sprue bushing is arranged in the through hole, a main pouring gate is arranged in the sprue bushing, the lower end of the main pouring gate is communicated with a cavity of the upper die, the upper end of the main pouring gate is communicated with the sprue, a core of the lower die is arranged below the cavity, the main pouring gate comprises a first pouring gate and a second pouring gate, the second pouring gate is positioned below the first pouring gate and communicated with the first pouring gate, the cross section of the bottom of the first pouring gate is arc-shaped, the cross section of the second pouring gate is conical, the diameter of the cross section of the second pouring gate is reduced downwards along the vertical direction, the first pouring gate can effectively increase the shearing heat of the melt, the melt flowability is enhanced, the continuous operation of the die is facilitated, the material consumption is saved, and the surplus material is reduced; the second pouring gate accelerates the flow speed of the conveyed molten plastic to form an ideal flow state, quickly fills the cavity, facilitates the continuous operation of the mold, saves materials and reduces excess materials.

Description

Continuous injection mold

Technical Field

The utility model relates to the field of injection molds, in particular to a continuous injection mold.

Background

The injection molding technology is widely applied to the molding of thermoplastic plastics, granular plastic raw materials can be heated in a heating cylinder of an injection molding machine to be in a flowing state, then the granular plastic raw materials are injected into a forming mold through a nozzle of an injection molding device, the mold is opened after a finished product is cooled and solidified, the finished product is ejected, and the single finished product with a specific structure type can be formed.

In summary, in order to overcome the defects in the prior art, a continuous injection mold with a simple structure and convenient use needs to be designed.

SUMMERY OF THE UTILITY MODEL

The utility model provides a continuous injection mold for solving the problems in the prior art.

The purpose of the utility model can be realized by the following technical scheme: a continuous injection mold comprising: the upper die comprises an upper die base, an upper die, a lower die and a lower die base, the upper die is fixedly arranged below the upper die base, the lower die is fixedly arranged above the lower die base, a sprue is arranged in the upper die, a through hole is formed in the upper die, a sprue bushing is arranged in the through hole, a main runner is arranged in the sprue bushing, the lower end of the main runner is communicated with a die cavity of the upper die, the upper end of the main runner is communicated with the sprue, a core of the lower die is arranged below the die cavity, the main runner comprises a runner I and a runner II, the runner II is positioned below the runner and is communicated with the runner I, the cross section of the bottom of the runner is arc-shaped, the cross section of the runner II is conical and is provided with the cross section diameter of the runner II which is downwards reduced along the vertical direction.

In a further improvement, the diameter of a cross section of the pouring channel is reduced downwards along the vertical direction.

In a further improvement, the cross section of the injection port is isosceles trapezoid, and the diameter of the cross section of the injection port is reduced downwards along the vertical direction.

In a further improvement, the upper die base is connected with a positioning ring through a bolt, the positioning ring is communicated with the pouring gate, and the inner diameter of the positioning ring is equal to the diameter of the upper end face of the pouring gate.

In a further improvement, the through hole is a stepped through hole, the diameter of the upper end of the through hole is larger than the diameter of the lower end of the through hole, the sprue bushing comprises an upper end of the bushing and a lower end of the bushing, the outer diameter of the upper end of the bushing is equal to the diameter of the upper end of the through hole, and the outer diameter of the lower end of the bushing is equal to the diameter of the lower end of the through hole.

Compared with the prior art, the cross section of the bottom of the pouring gate of the continuous injection mold is arranged in the shape of a circular arc, so that the shear rate of the melt can be effectively increased, larger shear heat can be generated, the apparent viscosity of the melt is reduced, the fluidity is enhanced, the continuous operation of the mold is facilitated, the material consumption is saved, and the generation of excess material is reduced; the diameter of the second cross section of the pouring gate is arranged to be reduced downwards along the vertical direction, so that the flow speed of the conveyed molten plastic generates acceleration to form an ideal flow state, the cavity is filled with molten plastic quickly, the effect of sealing the cavity to prevent molten plastic from flowing backwards is also achieved, the pouring gate and the plastic part are conveniently separated after molding, the continuous operation of the mold is facilitated, materials are saved, and excess materials are reduced.

Drawings

FIG. 1 is a schematic structural diagram of the present invention

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

FIG. 3 is a schematic view of the structure of the sprue bushing of the present invention

In the figure, 1-upper die holder, 11-sprue, 2-upper die, 21-through hole, 211-upper end, 212-lower end, 22-sprue bushing, 221-bushing upper end, 222-bushing lower end, 23-main runner, 231-runner one, 232-runner two, 24-cavity, 3-lower die, 31-core, 4-lower die holder and 5-positioning ring.

Detailed Description

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The technical solution of the present invention is further described below with reference to the following embodiments and accompanying drawings 1 to 3.

Example 1

The utility model provides a continuous injection mold, includes upper die base 1, goes up mould 2, lower mould 3 and die holder 4, it sets firmly in 1 below of upper die base to go up mould 2, lower mould 3 sets firmly in 4 tops of die holder, be equipped with sprue 11 in the upper die base 1, upward be equipped with through-hole 21 in the mould 2, be equipped with sprue bush 22 in the through-hole 21, be equipped with main 23 of watering in the sprue bush 22, the die cavity 24 of mould 2 is gone up in the communication of 23 lower extremes of main watering, main 23 upper end intercommunication sprue 11 of watering, the core 31 of lower mould 3 sets up in die cavity 22 below, main watering 23 is including watering one 231 and watering two 232, it is located and waters one 231 below and with a 231 intercommunication of watering to water two 232, it is arc to water one 231 bottom cross-section, it is the toper just to water two 232 cross-section diameters and the setting of watering two 232 along vertical direction downwardly reducing.

As shown in fig. 1, 2 and 3, the injection molding machine injects the molten melt through the sprue 11 and the main runner 23 into a cavity formed by the cavity 22 and the core 31 to mold a desired product. The first pouring channel 231 and the second pouring channel 232 of the main pouring channel 23 are arranged, the section of the second pouring channel 232 is conical, and the diameter of the upper end of the second pouring channel 232 is smaller than the diameter of the joint of the upper end of the second pouring channel 232 and the bottom of the first pouring channel 231; the cross section of the bottom of the first pouring gate 231 is arranged in an arc shape, so that the shear rate of the melt can be effectively increased, and larger shear heat can be generated, so that the apparent viscosity of the melt is reduced, the fluidity is enhanced, the continuous operation of a die is facilitated, the material consumption is saved, and the excess material is reduced; the diameter of the section of the second runner 232 is reduced downwards along the vertical direction, so that the flow speed of the conveyed molten plastic generates acceleration to form an ideal flow state, the cavity is filled with molten plastic quickly, the effect of sealing the cavity to prevent molten plastic from flowing backwards is also achieved, the sprue and the plastic part are conveniently separated after molding, the continuous operation of the mold is facilitated, materials are saved, and excess materials are reduced.

As a further preferred embodiment, the cross-sectional diameter of the first runner 231 decreases downward in the vertical direction. As shown in FIG. 3, runner one 231 is tapered to facilitate demolding.

As a further preferred embodiment, the section of the injection opening 11 is isosceles trapezoid, and the diameter of the section of the injection opening 11 is reduced downwards along the vertical direction. As shown in FIG. 2, the nozzle 11 with the above shape can effectively increase the shear rate of the melt and generate larger shear heat, thereby lowering the apparent viscosity of the melt, enhancing the fluidity and being more beneficial to mold filling.

In a further preferred embodiment, the upper die holder 1 is bolted with a positioning ring 5, the positioning ring 5 is communicated with the pouring gate 11, and the inner diameter of the positioning ring 5 is equal to the diameter of the upper end face of the pouring gate 11. As shown in fig. 2, the positioning ring ensures that the injection port 11 of the mold is horizontally and completely overlapped with the nozzle of the injection molding machine, and the positioning ring 5 is fixedly connected to the upper mold base 1 through a bolt, so that the installation and the replacement are convenient.

As a further preferred embodiment, the through hole 21 is a stepped through hole, the diameter of the upper end 211 of the through hole 21 is larger than the diameter of the lower end 212 of the through hole 21, the sprue bushing 22 includes a bushing upper end 221 and a bushing lower end 222, the outer diameter of the bushing upper end 221 is equal to the diameter of the upper end 211 of the through hole 21, and the outer diameter of the bushing lower end 222 is equal to the diameter of the lower end 212 of the through hole 21. As shown in fig. 3, the sprue bushing 22 is matched with the through hole 21 in shape, so that the sprue bushing 22 can be conveniently clamped and mounted in the through hole 21, and subsequent replacement is facilitated.

The foregoing detailed description of the preferred embodiments of the utility model has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims

1. The utility model provides a continuous injection mold, its characterized in that includes the upper die base, goes up mould, lower mould and die holder, it sets firmly in the upper die base below to go up the mould, the lower mould sets firmly in the die holder top, be equipped with the sprue in the upper die base, be equipped with the through-hole in the last mould, be equipped with the sprue bush in the through-hole, be equipped with the main die cavity of watering in the sprue bush, the main die cavity of watering the lower extreme intercommunication and going up the mould, the main upper end intercommunication sprue of watering, the core of lower mould sets up in the die cavity below, the main watering is including watering one and watering two, water two be located water a below and with water a intercommunication, it is convex to water a bottom cross-section, it is the toper just to water two cross-sectional diameters and reduce the setting downwards along vertical direction.

2. A continuous injection mold as claimed in claim 1, wherein a cross-sectional diameter of the runner decreases in a downward direction in a vertical direction.

3. A continuous injection mold according to claim 1, wherein the nozzle cross-section is an isosceles trapezoid and the diameter of the nozzle cross-section decreases downward in a vertical direction.

4. The continuous injection mold of claim 1, wherein the upper mold base is bolted to a positioning ring, the positioning ring is in communication with the nozzle and has an inner diameter equal to the diameter of the upper end face of the nozzle.

5. The continuous injection mold of claim 1, wherein the through hole is a stepped through hole, an upper end diameter of the through hole is larger than a lower end diameter of the through hole, the sprue bushing comprises a bushing upper end and a bushing lower end, an outer diameter of the bushing upper end is equal to the upper end diameter of the through hole, and an outer diameter of the bushing lower end is equal to the lower end diameter of the through hole.