CN212045783U

CN212045783U - Front mold elastic block structure of injection mold

Info

Publication number: CN212045783U
Application number: CN202020247274.1U
Authority: CN
Inventors: 邱翌; 邬开华
Original assignee: Ningbo Lian Science And Technology Co ltd
Current assignee: Ningbo Lian Science And Technology Co ltd
Priority date: 2020-03-03
Filing date: 2020-03-03
Publication date: 2020-12-01
Anticipated expiration: 2030-03-03

Abstract

The utility model relates to the technical field of injection molds, in particular to an injection mold front mold elastic block structure, which comprises a rear mold and a front mold, wherein the front mold is provided with a cavity towards one side of the rear mold, the front mold is provided with a plurality of material returning openings, the material returning openings are through grooves for penetrating the front mold, the material returning openings are arranged at the periphery of the cavity, the material returning openings are communicated with the cavity, material returning blocks capable of filling the space in the grooves are arranged in the material returning openings, the material returning blocks can horizontally reciprocate along the groove length of the through grooves in the through grooves, one end of the material returning blocks always faces towards the rear mold and is a discharging end, the other end of the material returning blocks is provided with an elastic returning structure, an elastic piece is arranged in the elastic returning structure, the discharging end of the material returning block corresponding to the elastic piece is arranged outside the through grooves under the normal state of the elastic piece, the discharging end of the material returning block is a leveling surface of a closed structure, the utility model can avoid the situation that, thereby improving the production efficiency.

Description

Front mold elastic block structure of injection mold

Technical Field

The utility model relates to an injection mold technical field, concretely relates to injection mold front mould bullet piece structure.

Background

In the process of manufacturing the mouse base (plastic part), an injection mold is generally adopted for molding, and the specific structural formula is as follows: the mouse base is formed in the injection molding cavity in an injection molding mode; then, demoulding the front mould and the rear mould, and unloading the injection molding piece immediately; generally, the injection molding piece is separated from the front mold along with the rear mold, and then is pushed by the ejector pin in the region after the rear mold is reset to discharge; however, sometimes the injection molding part is left in the front mold due to the viscosity of the injection molding part, so that the rear mold is in idle-load reset, the subsequent firing pin cannot realize the material return of the injection molding part, manual unloading is needed, the operation is troublesome, and the production efficiency is delayed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an injection mold front mould bullet piece structure.

To achieve the purpose, the utility model adopts the following technical proposal:

the front die elastic block structure of the injection die comprises a rear die and a front die, wherein a cavity is formed in one side, facing the rear die, of the front die, a plurality of material returning openings are formed in the front die and are through grooves penetrating through the front die, the material returning openings are formed in the periphery of the cavity and are communicated with the cavity, material returning blocks capable of filling space in the grooves of the material returning openings are arranged in the material returning openings and can horizontally reciprocate in the through grooves along the groove length of the through grooves, one end of each material returning block always faces the rear die and is a discharging end, an elastic piece is arranged in each material returning block, the discharging end, corresponding to the material returning block of the elastic piece, of each material returning block is located outside the corresponding through groove when the elastic piece is in a normal state, and the discharging end of each material returning block is a flat surface of a closed structure.

Further, the number of the material returning openings is at least four, and the material returning openings are distributed on the front die in a rectangular shape.

Furthermore, the end section of the material returning block is in a shape of a convex part with a narrow top and a wide bottom, the upper part of the material returning block is a narrow end, the opening of the material returning opening is matched with the end section of the material returning block, the part of the material returning opening, which corresponds to the upper part of the material returning block, is arranged on the outer edge of the cavity and communicated with the cavity, the lower part of the material returning block is positioned outside the edge of the cavity, the upper end surface of the material returning block can be in contact with an injection molding part in the cavity, and the lower end surface of the material returning block is not in contact with the injection molding part in the cavity all the.

Furthermore, the upper end face of the material returning block can only be in contact with the outer edge of the injection molding part, and the upper end face of the material returning block is provided with a material returning notch matched with the outline of the outer edge of the injection molding part.

Furthermore, the ejection structure is formed by a blind hole formed in the ejection block, the axial direction of the blind hole is parallel to the length of the through groove, the elastic piece comprises a return spring, one end of the return spring is fixedly connected with the bottom of the blind hole, and the other end of the return spring is fixedly connected with one side, away from the rear die, of the front die through a support.

The utility model has the advantages that: the reset spring can press the bottom of the blind hole to enable the discharging end of the material returning block to extend out of the through groove under the normal state, when the rear die and the front die are closed, the front side face of the rear die can contact the discharging end of the material returning block and enable the material returning block to press the reset spring to be pressed into the through groove, the rear die is in butt joint with the cavity of the front die at the moment to form a closed injection molding cavity, the injection molding piece is subjected to injection molding in the injection molding cavity, when the rear die and the front die perform demolding action, the rear die is gradually far away from the front die, the material returning block gradually loses the abutting force of the rear die, therefore, the elastic force of the reset spring can enable the material returning block to move together with the rear die at the moment, and the injection molding piece possibly located in the front die cavity can be pushed into the rear die cavity under the action of the; the utility model discloses can stop the long-pending condition of staying in the front model intracavity of injection molding and take place, and then promote production efficiency.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a schematic perspective view of the present invention;

fig. 2 is a schematic perspective view of the present invention;

fig. 3 is a schematic three-dimensional structure of the present invention;

fig. 4 is a schematic view of a partial three-dimensional structure of the present invention;

fig. 5 is a schematic view of a three-dimensional splitting structure of the present invention;

fig. 6 is a schematic view of a three-dimensional splitting structure of the present invention;

in the figure: the injection molding machine comprises a front mold 1, a rear mold 2, a cavity 3, a material returning opening 4, a material returning block 5, a material returning notch 6, a blind hole 7, a return spring 8, a support 9 and an injection molding part 10.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not indicated or implied that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are used only for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms will be understood by those skilled in the art according to the specific circumstances.

In the description of the present invention, unless otherwise explicitly specified or limited, the term "connected" or the like, if appearing to indicate a connection relationship between the components, is to be understood broadly, for example, as being either a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through one or more other components or may be in an interactive relationship with one another. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 6, the front mold elastic block structure of the injection mold comprises a rear mold 2 and a front mold 1, wherein a cavity 3 is formed in one side of the front mold 1 facing the rear mold 2, a plurality of material returning openings 4 are formed in the front mold 1, the material returning openings 4 are through grooves penetrating through the front mold 1, the material returning openings 4 are located at the periphery of the cavity 3, the material returning openings 4 are communicated with the cavity 3, material returning blocks 5 capable of filling spaces in the grooves are arranged in the material returning openings 4, the material returning blocks 5 can horizontally reciprocate in the through grooves along the groove length of the through grooves, one end of each material returning block 5 always faces the rear mold 2 and is a discharging end, the other end of each material returning block 5 is provided with an elastic returning structure, an elastic piece is arranged in the elastic returning structure, and the discharging end of each material returning block 5 corresponding to the elastic piece is located outside the through groove when the elastic piece is in a normal state, the discharging end of the material returning block 5 is a flat surface with a closed structure.

The quantity of the material returning openings 4 is at least four, and the material returning openings 4 are distributed on the front mold 1 in a rectangular manner, and the quantity of the material returning openings 4 is four, and the material returning openings are distributed in a rectangular manner, which means that all the material returning blocks 5 are also distributed in the same manner, so that when the material returning blocks 5 push the injection molding parts 10 in the cavity 3, the stress on the injection molding parts 10 is uniform, and the injection molding parts 10 cannot be pushed askew.

The cross section of the end part of the material returning block 5 is in a convex shape with a narrow upper part and a wide lower part, the upper part of the material returning block 5 is a narrow end, the opening of the material returning opening 4 is matched with the cross section of the end part of the material returning block 5, the part of the material returning opening 4, corresponding to the upper part of the material returning block 5, is arranged on the outer edge of the cavity 3 and communicated with the cavity 3, the lower part of the material returning block 5 is positioned outside the edge of the cavity 3, the upper end surface of the material returning block 5 can be contacted with an injection molding piece 10 in the cavity 3, the lower end surface of the material returning block 5 is not contacted with the injection molding piece 10 in the cavity 3 all the time, and the upper part (namely the narrower part) of the material returning block 5 is positioned on the edge of; the lower part (i.e. the wider part) of the stripper block 5 is outside the edge of the cavity 3 and is therefore a non-contacting injection molded part 10; the benefits of this arrangement are: the part of the material returning opening 4 arranged on the edge of the cavity 3 is communicated with the cavity 3, so that the part of the material returning block 5 corresponding to the part is heated to generate the sticky phenomenon, the part of the material returning opening 4 arranged outside the edge of the cavity 3 is closed because the part of the rear die 2 and the front die 1 outside the cavity 3 are in close contact when the rear die and the front die are in a closed state, so that the part of the material returning opening 4 is closed, the part of the material returning block 5 corresponding to the area cannot generate the sticky phenomenon, and in order to prevent the part of the material returning block 5 which is possibly sticky from causing the elastic piece to be incapable of moving due to the sticky property, the specification of the part of the material returning block 5 which is not sticky is larger than the specification of the part which is possibly generated with the sticky phenomenon, so that even if the narrow end of the material returning block 5 generates the sticky phenomenon, the wide end of the material returning block 5 can drive the narrow end of the material returning block 5 together through, break through the viscosity.

The upper end face of the material returning block 5 can only contact with the outer edge of the injection molding part 10, and the upper end face of the material returning block 5 is provided with a material returning notch 6 which is matched with the outline of the outer edge of the injection molding part 10; the material returning notch 6 can make the material returning block well contact with the injection molding piece 10, and can play a stable pushing role.

The elastic withdrawing structure is formed by a blind hole 7 arranged on a withdrawing block 5, the axial direction of the blind hole 7 is parallel to the length of the through groove, the elastic part comprises a return spring 8, one end of the return spring 8 is fixedly connected with the bottom of the blind hole 7, the other end of the return spring 8 is fixedly connected with one side of the front die 1 away from the rear die 2 through a support 9, the return spring 8 can press the bottom of the blind hole 7 under normal state to enable the discharging end of the withdrawing block 5 to extend out of the through groove, when the rear die 2 and the front die 1 are closed, the front side surface of the rear die 2 can contact the discharging end of the withdrawing block 5 and enable the withdrawing block 5 to press the return spring 8 to be pressed into the through groove, when the rear die 2 and the front die 1 are demoulded, the rear die 2 gradually gets away from the front die 1, then the withdrawing block 5 gradually loses the contact force of the rear die 2, therefore, the elastic force of the return spring 8 can enable the withdrawing block 5 to move together with the rear die 2, the action of the stripper block 5 pushes the injection molded part 10, which may be in the cavity 3 of the front mold 1, into the cavity 3 of the rear mold 2; the situation that the injection molding part 10 is accumulated in the cavity 3 of the front mold 1 is avoided.

The working principle is as follows: the reset spring 8 can press the bottom of the blind hole 7 to enable the discharging end of the material withdrawing block 5 to extend out of the through groove, when the rear die 2 and the front die 1 are closed, the front side surface of the rear die 2 can contact the discharging end of the material withdrawing block 5 and enable the material withdrawing block 5 to press the reset spring 8 to be pressed into the through groove, at the moment, the rear die 2 is in butt joint with the cavity 3 of the front die 1 to form a closed injection molding cavity, the injection molding piece 10 is subjected to injection molding in the injection molding cavity, then when the rear die 2 and the front die 1 perform demolding action, the rear die 2 is gradually far away from the front die 1, and the material withdrawing block 5 gradually loses the abutting force of the rear die 2, so that the elastic force of the reset spring 8 can enable the material withdrawing block 5 to move together with the rear die 2 at the moment, and at the moment, the action of the material withdrawing block 5 can push the injection molding piece 10 which may be in the cavity 3 of the front; thereby avoiding the situation that the injection molding part 10 is accumulated in the cavity 3 of the front mold 1.

It should be understood that the above-described embodiments are merely illustrative of the preferred embodiments of the present invention and the technical principles thereof. It will be understood by those skilled in the art that various modifications, equivalents, changes, and the like can be made to the present invention. However, these modifications are within the scope of the present invention as long as they do not depart from the spirit of the present invention. In addition, certain terms used in the specification and claims of the present application are not limiting, but are used merely for convenience of description.

Claims

1. The injection mold front mold elastic block structure comprises a rear mold (2) and a front mold (1), and is characterized in that a cavity (3) is formed in one side, facing the rear mold (2), of the front mold (1), a plurality of material returning openings (4) are formed in the front mold (1), the material returning openings (4) are through grooves penetrating through the front mold (1), the material returning openings (4) are located on the periphery of the cavity (3), the material returning openings (4) are communicated with the cavity (3), material returning blocks (5) capable of filling space in the grooves are arranged in the material returning openings (4), the material returning blocks (5) can horizontally reciprocate in the through grooves along the groove length of the through grooves, one end of each material returning block (5) always faces the rear mold (2), the other end of each material returning block is a discharging end, an elastic piece is arranged at the other end of each material returning block (5), and an elastic piece is arranged in each elastic piece, when the elastic piece is in a normal state, the discharging end of the material returning block (5) corresponding to the elastic piece is positioned outside the through groove, and the discharging end of the material returning block (5) is a flat surface with a closed structure.

2. An injection mould front mould block structure as claimed in claim 1, characterized in that said ejection openings (4) are at least four in number and are distributed rectangularly on the front mould (1).

3. An injection mold front mold elastic block structure as claimed in claim 2, characterized in that the end section of the material returning block (5) is in a shape of a Chinese character 'tu' with a narrow top and a wide bottom, the upper part of the material returning block (5) is a narrow end, the opening of the material returning opening (4) is matched with the end section of the material returning block (5), the part of the material returning opening (4) corresponding to the upper part of the material returning block (5) is arranged on the outer edge of the cavity (3) and communicated with the cavity (3), the lower part of the material returning block (5) is arranged outside the edge of the cavity (3), the upper end surface of the material returning block (5) can be contacted with the injection molding (10) in the cavity (3), and the lower end surface of the material returning block (5) is not contacted with the injection molding (10) in the cavity (3) all the time.

4. An injection mold front mold spring piece structure as claimed in claim 3, characterized in that the upper end face of the stripper piece (5) can only contact with the outer edge of the injection molded piece (10), and the upper end face of the stripper piece (5) is provided with a stripper notch (6) matching the contour of the outer edge of the injection molded piece (10).

5. An injection mold front mold elastic block structure as claimed in any one of claims 1 to 4, characterized in that, the ejection structure is formed by a blind hole (7) opened on the ejection block (5), the axial direction of the blind hole (7) is parallel to the groove length of the through groove, the elastic member comprises a return spring (8), one end of the return spring (8) is fixedly connected with the bottom of the blind hole (7), and the other end of the return spring (8) is fixedly connected with one side of the front mold (1) far away from the rear mold (2) through a bracket (9).