CN217395572U

CN217395572U - Injection mold with air blowing channel

Info

Publication number: CN217395572U
Application number: CN202221118292.5U
Authority: CN
Inventors: 不公告发明人
Original assignee: Calolo Plastic Technology Taicang Co ltd
Current assignee: Calolo Plastic Technology Taicang Co ltd
Priority date: 2022-05-10
Filing date: 2022-05-10
Publication date: 2022-09-09
Anticipated expiration: 2032-05-10

Abstract

The utility model provides an injection mold with an air blowing channel, which is used for molding injection molding parts with hollow structures, and comprises a front mold bottom plate, a front mold plate, a rear mold plate and a rear mold bottom plate which are arranged in sequence, wherein the front mold plate is provided with an outer core, the rear mold plate is provided with an inner core, and a molding mold cavity of the injection molding parts is formed between the outer core and the inner core; the injection molding machine is characterized in that a push plate is arranged between the front template and the rear template and connected with an ejection rod of the injection molding machine, a push sleeve is arranged on the push plate, an imitated hole for the inner core to pass through is formed in the push sleeve, and a blowing channel for enabling the imitated hole to be communicated with an external gas circuit is formed in the circumferential wall of the imitated hole. Injection mold with channel of blowing in this scheme through set up the channel of blowing on pushing away the cover, blows to the die cavity in when outer core and interior core separation, can not only cool off injection molding central point, can also clean the die cavity after the drawing of patterns at every turn, prevents that impurity from influencing the injection molding quality.

Description

Injection mold with air blowing channel

Technical Field

The utility model belongs to the technical field of injection moulding, especially, relate to an injection mold with air blowing channel.

Background

The injection mold is manufactured by adding plastic into a mold, gradually and uniformly coating and melting the plastic in the mold on the whole surface of the mold cavity under the action of gravity and heat energy, forming into a required shape, and then cooling and shaping. The injection molding method has the advantages of high production speed, high efficiency, automation of operation, accurate product size, easy replacement of products and suitability for mass production of products with complex shapes, and the shapes of the products can be changed from simple to complex and the sizes of the products can be changed from large to small.

For injection molding parts with hollow structures, cooling water paths which transversely surround the products are generally adopted for cooling the products and the molds, the centers of the products are far away from the cooling water paths, the total cooling time is prolonged, and therefore the production efficiency is reduced. In addition, after one-time injection molding is finished, the mold needs to be opened and closed once, and dust impurities in the air can fall into the mold cavity to affect the appearance of the product; in addition, along with long-term friction, some falling scrap irons and scraps of plastic products can be generated on the die, and part of the scrap irons and the scraps can fall into the die cavity, so that the attractiveness is influenced, and the service performance, the strength and the like of the products can be caused.

In the prior art, generally, a die is maintained regularly, spare parts of a wear part are replaced, a die cavity is cleaned, lubricating oil is coated, and the like, but the die is required to be disassembled after being stopped, the time interval is long, and impurities generated in two maintenance periods cannot be treated; in some workshops, the air gun is used for removing impurities in the mold cavity after mold opening at each time, but the impurity removing effect cannot be guaranteed, the mold opening and closing time is prolonged, and the production efficiency is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model provides an injection mold with gas blowing channel can cool off the inside of hollow injection molding, can also effectively get rid of the impurity in the die cavity simultaneously.

Other objects and advantages of the present invention can be obtained from the technical features of the present invention disclosed herein.

In order to achieve the above-mentioned purpose or other purposes, the utility model provides an injection mold with air blowing channel for the shaping of the injection molding that has hollow structure, including the preceding die bed plate, preceding template, back template and the back die bed plate that set gradually, be equipped with the outward shape core on the preceding template, be equipped with the inner core on the back template, form the shaping die cavity of injection molding between outward shape core and the inner core; the injection molding machine is characterized in that a push plate is arranged between the front template and the rear template and connected with an ejection rod of the injection molding machine, a push sleeve is arranged on the push plate, an imitated hole for the inner core to pass through is formed in the push sleeve, and a blowing channel for enabling the imitated hole to be communicated with an external gas circuit is formed in the circumferential wall of the imitated hole.

After the injection molding piece is molded, when the mold is opened, air is blown into the profiling hole through the air blowing channel, a gap exists between the inner mold core and the hollow cavity of the injection molding piece, the air flows out through the hollow cavity of the injection molding piece, and heat at the center of the injection molding piece is taken away due to heat exchange in the flowing process of the air, so that the cooling of a product is accelerated, the total cooling time is shortened, and the production efficiency is improved; simultaneously, because the effect of air current, after the injection molding drawing of patterns, impurity such as iron fillings, material bits in the die cavity also is clear away, and the dust can not drop into the die cavity, is favorable to injection molding surface quality, avoids impurity influence injection molding performance.

The blowing channel can be arranged horizontally or obliquely, and in one possible embodiment, the blowing channel is inclined towards the shape core, so that impurities can be blown out of the mold.

The number of the blowing channels is a plurality of the blowing channels which are symmetrically arranged by taking the axis of the profiling hole as a center, so that the diameter of each blowing channel is reduced while the air flow is ensured, and the use strength of the push sleeve is ensured.

The outer surface of the push sleeve is provided with an annular groove, one end part of the blowing channel is positioned in the annular groove, the annular groove is communicated with an external gas circuit, the external gas circuit supplies gas to the annular groove, sufficient flowing gas in the annular groove is ensured, the gas in the annular groove is distributed to each blowing channel, two or more directions of gas flow are formed, and the inner surface of the push sleeve is favorably cleaned.

The push plate is provided with an air connector for connecting an external air path and an air path for connecting the air connector with the annular groove, the air connector is used for connecting an air source through an air pipe, and air enters the air path through the air connector and then flows into the annular groove.

The annular groove is formed by machining through a numerically controlled lathe, and the air blowing channel is formed by machining through a drilling machine.

The outer surface of the push sleeve is positioned on two sides of the annular groove and is provided with a sealing ring for preventing air leakage, and generally, the surface of the push sleeve is provided with a groove for placing the sealing ring at the mounting position of the sealing ring.

And a first cooling water channel surrounding the outer core is arranged on the front template, and the injection molding piece and the mold are cooled from the circumferential direction of the injection molding piece.

And a second cooling water channel leading to the axial center of the inner mold core is arranged on the rear mold bottom plate, and the injection molding part and the mold are cooled from the center of the inner mold core.

The injection mold with the air blowing channel further comprises a controller, wherein the controller controls the on-off of an air path in the air blowing channel in the mold opening and closing process, continuous air blowing is avoided, and the cost is saved.

Compared with the prior art, the beneficial effects of the utility model mainly include:

1. the utility model provides an injection mold with air blowing channel, through set up the air blowing channel on pushing away the cover, blow to the die cavity in the time of outer core and interior core separation, can not only cool off injection molding central point and put, guarantee product quality, can also clean the die cavity after every drawing of patterns, prevent that impurity from influencing injection molding quality;

2. the utility model provides an injection mold with channel of blowing pushes away the cover axle center through setting up a plurality of and pushes away the channel of blowing of the terminal surface center slope towards the outward shape core that the cover axle center is central symmetry, and the air current orientation pushes away the cover internal surface and has not equidirectional, is favorable to cooling and cleaning action.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an injection mold with an air blowing channel according to an embodiment of the present invention;

FIG. 2 is an enlarged view of FIG. 1 at A;

fig. 3 is a schematic view of a mold opening process of the injection mold with a blowing channel according to an embodiment of the present invention.

Reference numerals: 1-front mould bottom plate, 2-hot runner plate, 3-backing plate, 4-front mould plate, 41-outer mould core, 5-push plate, 51-push sleeve, 510-annular groove, 511-air blowing channel, 512-sealing ring, 52-air joint, 6-rear mould plate, 61-inner mould core, 7-rear mould bottom plate, 8-first cooling water channel, 9-second cooling water channel and 100-injection moulding piece.

Detailed Description

The foregoing and other technical and other features and advantages of the invention will be apparent from the following detailed description of a preferred embodiment, when read in conjunction with the accompanying drawings. Directional terms as referred to in the following examples, for example: up, down, left, right, front or rear, etc., are referred to only in the direction of the attached drawings. Accordingly, the directional terminology used is intended to be illustrative and not limiting of the invention.

Examples

The injection mold with the air blowing channel of the embodiment shown in fig. 1-3 is used for molding an injection molding part with a hollow structure, and comprises a front mold base plate 1, a hot runner plate 2, a base plate 3, a front mold plate 4, a push plate 5, a rear mold plate 6 and a rear mold base plate 7 which are sequentially arranged, wherein the front mold plate 4 is provided with an outer core 41, the rear mold plate 6 is provided with an inner core 61, a molding mold cavity of the injection molding part is formed between the outer core 41 and the inner core 61, the push plate 5 is provided with a push sleeve 51, the push sleeve 51 is provided with a profiling hole for the inner core 61 to pass through, the push plate 5 is connected with an ejector rod of the injection molding machine, and the ejector rod pushes the push plate 5 to move towards the front mold plate 4 after mold opening, so that the inner core 61 is separated from the injection molding part 100, and demolding of the injection molding part 100 is realized.

The hot runner plate 2 and the backing plate 3 are arranged as required according to the specific structure of the mold, and in another embodiment, the hot runner plate 2 and the backing plate 3 may not be arranged.

As shown in fig. 2, the circumferential wall of the push sleeve 51 surrounding the contour hole is provided with an air blowing channel 511 for communicating the contour hole with an external air passage. Specifically, in this embodiment, an air connector 52 for connecting an air source is disposed on the push plate 5, an annular groove 510 is disposed on the outer surface of the push sleeve 51 in the circumferential direction, the air connector 52 is communicated with the annular groove 510 through an air passage in the push plate 5, one end of an air blowing channel 511 is located in the annular groove 510, and the other end of the air blowing channel 511 is inclined toward the outer core 41, that is, an air flow sequentially passes through the air connector 52, the annular groove 510, and the air blowing channel 511 to reach the dummy hole, and then reaches the hollow hole of the injection molding part 100 to cool the central position of the injection molding part 100, and after the injection molding part 100 is demolded, the air flow can blow out impurities in the mold cavity, such as scrap iron generated by mold abrasion, injection molding chips generated during injection molding, and dust in air. In other embodiments, the blowing channel 511 may be arranged horizontally, which also serves for cooling and cleaning, but the inclined arrangement is more advantageous for cleaning the mold cavity. A sealing ring 512 for preventing air leakage is provided on both sides of the annular groove 510. Usually, a groove for placing the sealing ring 512 is provided on the pushing sleeve 51, so as to facilitate the installation and positioning of the sealing ring 512.

The material of the push sleeve 51 is die steel, the annular groove 510 is formed by machining with a numerically controlled lathe, and the air blowing channel 511 is formed by machining with a drilling machine.

In this embodiment, two blowing channels 511 are symmetrically arranged with the axis of the contour hole as the center, and two air flows blow into the mold cavity in opposite directions and blow away towards the front mold plate 4, which is beneficial to forming two ascending air flows, thereby being beneficial to cooling the mold and cleaning the mold cavity.

In other embodiments, the air blowing channels 511 may also be asymmetrically arranged, and air can be blown towards the contour holes; the number of the air blowing passages 511 may be one or more, and when there is a plurality of air blowing passages 511, the outer ends of the air blowing passages 511 may be directly connected to the air passages in the push plate 5 without providing the annular groove 510.

The front mold plate 4 is provided with a first cooling water path 8 surrounding the outer mold core 41, the rear mold bottom plate 7 is provided with a second cooling water path 9 communicated to the axial center of the inner mold core 61, and the second cooling water path is matched with the blowing channel 511 to cool the mold and the injection molding part 100 from different directions and different positions, so that the product quality is ensured, the cooling time in the production period is shortened, and the production efficiency is improved. The on-off of the air passage in the air blowing passage 511 is controlled by a controller, in the embodiment, air blowing is started when the push plate 5 is ejected, and air blowing is stopped after die assembly.

As shown in fig. 3, where (a) is a mold closing state, (b) is a mold opening state, (c) is a state where the ejector pin of the injection molding machine ejects 5mm, and (d) is a state where the injection molding member 100 is completely ejected, the mold opening process of the injection mold with the air blowing channel of the present embodiment is as follows:

after the injection molding piece 100 is molded, the mold is split under the action of an injection molding machine by taking the joint surface of the front template 4 and the push plate 5 as a split surface, so that the upper end surface of the injection molding piece 100 is completely separated from the outer mold core 41;

the ejector rod of the injection molding machine pushes the push plate 5 to move towards the direction of the front template 4, at the moment, the contour hole in the push sleeve 51 and the inner core 61 start to be separated to generate a gap, meanwhile, the controller controls the air path to blow air into the air blowing channel 511, the air is blown into the hollow cavity of the injection molding piece 100 to form air flow, partial heat is taken away through heat exchange in the air flow flowing process, and partial impurities are blown out at the same time; in the present embodiment, the inner core 61 is conical, and the clearance between the contour hole and the inner core 61 is generated by the shape itself; for other shapes of internal cores, gaps are also formed due to draft angles during mold opening.

The push plate 5 continues to move under the action of the ejector rod of the injection molding machine until the contour hole in the push sleeve 51 is completely separated from the inner core 61;

and (3) demolding the injection molding part 100, continuously cleaning the mold cavity by using air flow in the mold closing process, and closing the air path by using the controller after the mold closing is finished.

It is right above the utility model provides an injection mold with gas blowing channel introduces in detail, and this paper only uses specific individual example right the utility model discloses a structure and theory of operation have been expounded, and the description of above embodiment is only used for helping understanding the utility model discloses a method and core thought. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the scope of the appended claims.

Claims

1. An injection mold with a blowing channel is used for molding an injection molding part with a hollow structure and comprises a front mold bottom plate (1), a front mold plate (4), a rear mold plate (6) and a rear mold bottom plate (7) which are sequentially arranged, wherein an outer mold core (41) is arranged on the front mold plate (4), an inner mold core (61) is arranged on the rear mold plate (6), and a molding mold cavity of the injection molding part is formed between the outer mold core (41) and the inner mold core (61); the injection molding machine is characterized in that a push plate (5) is arranged between the front template (4) and the rear template (6), the push plate (5) is connected with an ejector rod of the injection molding machine, a push sleeve (51) is arranged on the push plate (5), an imitation hole through which the inner core (61) passes is arranged on the push sleeve (51), and a blowing channel (511) which enables the imitation hole to be communicated with an external gas circuit is formed in the circumferential wall of the imitation hole in a surrounding mode.

2. The injection mold with blow channel as claimed in claim 1, characterized in that the blow channel (511) is inclined towards the outer core (41).

3. The injection mold with the air blowing channel as claimed in claim 1 or 2, wherein the air blowing channel (511) is provided in a plurality of numbers symmetrically around the center of the contour hole.

4. An injection mold with an air blowing channel according to claim 3, characterized in that the outer surface of the push sleeve (51) is provided with an annular groove (510), one end of the air blowing channel (511) is located in the annular groove (510), and the annular groove (510) is communicated with an external air passage.

5. The injection mold with an air blowing channel as claimed in claim 4, wherein the push plate (5) is provided with an air connector (52) for connecting an external air passage and an air passage for connecting the air connector (52) with the annular groove (510).

6. The injection mold with a blowing channel as claimed in claim 4, wherein the annular groove (510) is formed by a numerically controlled lathe and the blowing channel (511) is formed by a drilling machine.

7. The injection mold with an air blowing channel as claimed in claim 4, wherein the outer surface of the push sleeve (51) is provided with a sealing ring (512) for preventing air leakage at both sides of the annular groove (510).

8. The injection mold with blow channel as claimed in claim 1, characterized in that the front mold plate (4) is provided with a first cooling water channel (8) surrounding the outer core (41).

9. An injection mould with a blow channel according to claim 1, characterised in that the rear mould base plate (7) is provided with a second cooling water channel (9) which opens into the axial centre of the inner core (61).

10. The injection mold with the air blowing channel as claimed in claim 1, further comprising a controller, wherein the controller controls the on-off of the air channel in the air blowing channel (511) during the mold opening and closing process.