CN218399265U

CN218399265U - Negative pressure hot runner mold

Info

Publication number: CN218399265U
Application number: CN202222890284.9U
Authority: CN
Inventors: 王小杨; 李鑫; 李财
Original assignee: Hengyang Dongwu Plastic Products Co ltd
Current assignee: Hengyang Dongwu Plastic Products Co ltd
Priority date: 2022-11-01
Filing date: 2022-11-01
Publication date: 2023-01-31
Anticipated expiration: 2032-11-01

Abstract

The utility model discloses a mould technical field's a negative pressure hot runner mold, including install on the injection molding machine die holder first template and with the second template of the adjacent installation of first template, the molding chamber has been seted up on the second template, be equipped with a plurality of die cavities in the molding chamber, set up the runner of gluing of walking that runs through the die cavity in the second template. Compared with the prior art, the beneficial effects of the utility model are that: through negative pressure equipment to walking interior evacuation of gluey runner, make liquefied resin can get into the die cavity fast and be full of the die cavity along walking gluey runner like this, improved the efficiency and the beat of moulding plastics, through setting up the silica gel packing ring, and then seal between first template, the second template, reduce liquefied resin and leak.

Description

Negative pressure hot runner mold

Technical Field

The utility model relates to the technical field of mold, specifically a negative pressure hot runner mold.

Background

The mould is a tool which can make the blank into a finished piece with specific shape and size under the action of external force, and is widely used for blanking, die forging, cold heading, extrusion, powder metallurgy piece pressing, pressure casting and the forming processing of compression molding or injection molding of products such as engineering plastics, rubber, ceramics and the like, the mould has a specific outline or inner cavity shape, the blank can be separated (blanked) according to the contour line shape by applying the outline shape with a cutting edge, the blank can obtain a corresponding three-dimensional shape by applying the inner cavity shape, the mould generally comprises a movable mould and a fixed mould (or a male mould and a female mould), the movable mould and the fixed mould can be combined, the finished piece is taken out when the fixed mould is separated, the blank is injected into a mould cavity to be formed when the fixed mould is closed, the mould is a precision tool, has a complex shape, bears the expansion force of the blank, and has higher requirements on structural strength, rigidity, surface hardness, surface roughness and processing precision, and the development level of mould production is one of important marks of the mechanical manufacturing level.

In actual operation, because the number of cavities of some models of molds is large, a cold runner and a mold structure in conventional design cannot meet normal production requirements, so that poor injection molding is caused, for example, liquefied resin cannot be filled into the cavities quickly during injection molding, and the beat of injection molding operation is influenced.

To solve the above problems, we propose a negative pressure hot runner mold.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome prior art's defect, provide a negative pressure hot runner mold, in order to solve the technical problem who mentions in the above-mentioned background art, the utility model provides a following technical scheme:

the utility model provides a negative pressure hot runner mold, including install the first template on the injection molding machine die holder and with the second template of the adjacent installation of first template, the one-tenth die cavity has been seted up on the second template, become the intracavity and be equipped with a plurality of die cavities, set up the runner of gluing of walking that runs through the die cavity in the second template.

In the negative pressure hot runner mold, the second mold plate is provided with two vacuum-pumping ports, and the two vacuum-pumping ports are respectively communicated with the ports at the two ends of the glue flow channel.

In the negative-pressure hot runner mold, the lower mold base of the injection molding machine is vertically connected with a plurality of guide posts, the first mold plate and the second mold plate are embedded with a plurality of guide sleeves, and the guide sleeves are correspondingly sleeved on the guide posts and can freely slide up and down.

In the negative pressure hot runner mold, a plurality of cooling channels are mounted on the second mold plate, and the cooling channels are communicated with each other.

In the negative-pressure hot runner mold, the abutting surfaces of the first mold plate and the second mold plate are sealed by installing a silicone gasket.

Compared with the prior art, the beneficial effects of the utility model are that: vacuum pumping in the glue flowing channel is carried out through negative pressure equipment, so that liquefied resin can quickly enter the cavity along the glue flowing channel and be full of the forming cavity, injection molding efficiency and beat are improved, and through the arrangement of the silica gel gasket, sealing is carried out between the first template and the second template, and liquefied resin leakage is reduced.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the principles of the invention. In the drawings:

fig. 1 is a schematic structural view of a negative pressure hot runner mold of the present invention;

fig. 2 is a schematic structural diagram of the silicone gasket of the present invention.

In the figure: 1-a first template, 2-a vacuum-pumping port, 3-a cooling runner, 4-a second template, 5-a guide sleeve, 6-a guide column, 7-a forming cavity, 8-a cavity, 9-a silica gel gasket, 91-an arc section, 92-an air storage cavity, 93-a main body and 94-a pressure-bearing section.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

Examples

Referring to fig. 1-2, a negative pressure hot runner mold comprises a first mold plate 1 mounted on a lower mold base of an injection molding machine and a second mold plate 4 mounted adjacent to the first mold plate 1, wherein a molding cavity 7 is formed in the second mold plate 4, a plurality of mold cavities 8 are formed in the molding cavity 7, a glue flowing channel penetrating through the mold cavities 8 is formed in the second mold plate 4, in addition, two vacuum pumping ports 2 are formed in the second mold plate 4, the two vacuum pumping ports 2 are respectively communicated with two end openings of the glue flowing channel, an external vacuum pumping device is started and communicated with the two vacuum pumping ports, so that the inside of the glue flowing channel can be vacuumized through the vacuum pumping ports, and therefore, liquefied resin in the mold cavities can be quickly filled in the molding cavities under the action of negative pressure, and the injection molding efficiency is improved.

In this embodiment, a plurality of guide posts 6 are vertically connected to the lower die holder of the injection molding machine, a plurality of guide sleeves 5 are embedded in the first die plate 1 and the second die plate 4, the guide sleeves 5 are correspondingly sleeved on the guide posts 6 and can freely slide up and down, and the guide posts guide the first die plate and the second die plate, so that the position precision between the first die plate and the second die plate is higher.

In this embodiment, install a plurality of cooling runner 3 on the second template 4, a plurality of cooling runner 3 communicate each other, and outside coolant liquid conveying equipment carries the coolant liquid to in the cooling runner 3 to through flowing in cooling runner 3, and then cool down whole die holder, the shaping after the acceleration is moulded plastics.

In this embodiment, the abutting surfaces of the first template 1 and the second template 4 are sealed by installing the silica gel gasket 9, so as to reduce leakage of liquefied resin from the abutting surfaces of the first template and the second template, further, the silica gel gasket 9 is composed of an arc section 91, a main body 93, a gas storage cavity 92 and a pressure-bearing section 94, wherein the arc section 91 and the pressure-bearing section 94 are respectively arranged on the upper side and the lower side of the main body 93, the gas storage cavity 92 is arranged in the main body 93 and is filled with inert gas, the pressure-bearing section 94 is arranged in a gasket mounting groove formed on the surface of the first template/the second template, so as to fix the silica gel gasket 9, the arc section 91 is used for abutting against the surface of the second template/the first template, when abutting, the inert gas in the gas storage cavity 92 plays a role in buffering, so as to reduce aging and wear of the silica gel gasket, the main body 93 is mainly used for elastic deformation, and then generates a sealing effect on the abutting surfaces of the first template and the second template.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for descriptive purposes only. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a negative pressure hot runner mold, its characterized in that, including install first template (1) on the injection molding machine die holder and with second template (4) of first template (1) adjacent installation, set up into die cavity (7) on second template (4), be equipped with a plurality of die cavities (8) in becoming die cavity (7), set up the gluey runner of walking that runs through die cavity (8) in second template (4).

2. The negative-pressure hot runner mold as claimed in claim 1, wherein the second mold plate (4) is provided with two vacuum ports (2), and the two vacuum ports (2) are respectively communicated with the two end openings of the glue flow channel.

3. The negative-pressure hot runner mold as claimed in claim 1, wherein a plurality of guide posts (6) are vertically connected to the lower mold base of the injection molding machine, a plurality of guide sleeves (5) are embedded in the first mold plate (1) and the second mold plate (4), and the guide sleeves (5) are correspondingly sleeved on the guide posts (6) and can freely slide up and down.

4. A negative pressure hot runner mold according to claim 1, wherein a plurality of cooling channels (3) are installed on the second mold plate (4), and the plurality of cooling channels (3) are communicated with each other.

5. A negative pressure hot runner mold according to claim 1, wherein the abutting surfaces of the first mold plate (1) and the second mold plate (4) are sealed by installing a silicone gasket (9).