CN223864238U - An automatic injection molding production equipment for food packaging boxes - Google Patents

Abstract

This utility model relates to an automatic injection molding production equipment for food packaging boxes, including a fixed mold, a moving mold, a mold auxiliary part, and an ejector part. The fixed mold has a first cavity with a gate on the side facing the moving mold. The moving mold auxiliary part includes a template, and a second cavity is formed at the center of the template. The first and second cavities together form an injection molding cavity. The moving mold includes a base, an inner core, and an inner groove. The inner core is formed at the center of the base facing the fixed mold and passes through the second cavity, forming the injection molding core. Through the coordinated arrangement of the fixed mold, moving mold, moving mold auxiliary part, and ejector part, when injection molding plastic packaging boxes with a skirt around the outer edge of the opening, the injection-molded plastic packaging box can be completely separated from the moving mold through two ejection processes. This improves the smoothness of the demolding process and reduces deformation and damage during demolding.

Description

Automatic injection molding production equipment for food packaging boxes

Technical Field

The utility model relates to the technical field of injection molding processing of food packaging boxes, in particular to automatic injection molding production equipment for food packaging boxes.

Background

When the plastic food packaging box is manufactured, plastic raw material particles are heated and melted and then added into a die, and the die is removed after the plastic raw material particles are cooled and molded.

In the field of injection molding, especially in the production process of plastic packaging boxes with a circle of skirt edges at the outer edge of an opening, a traditional demolding mode mainly ejects a molded product out of a mold through a thimble. However, in practical application, the conventional ejector pin demolding method tends to cause damage or deformation of the skirt edge part of the packaging box in the ejection process due to the skirt edge structure, and particularly, the risk of damage is obviously increased under the condition that the skirt edge is thinner or made of softer materials. In addition, the close fit between the skirt and the mold cavity also increases the difficulty of demolding.

Disclosure of utility model

(One) solving the technical problems

The utility model provides automatic injection molding production equipment for food packaging boxes, which solves the problems in the prior art.

(II) technical scheme

In order to achieve the above purpose, the automatic injection molding production equipment for the food packaging box comprises a fixed die, a movable die, a die auxiliary part and an ejection part, wherein a first cavity communicated with a pouring gate is formed on one side of the fixed die facing the movable die, the movable die auxiliary part comprises a template, a second cavity is formed at the center of the template, an injection molding cavity is jointly formed between the first cavity and the second cavity, the movable die comprises a base, an inner core and an inner groove, the inner core is formed at the center of one side of the base facing the fixed die, the inner core penetrates through the second cavity and forms an injection molding core, the inner groove is formed in the middle of the base and the inner core, the ejection part is movably arranged in the inner groove, and the ejection part is used for ejecting injection molded products.

Preferably, the ejection part comprises a push rod, a connecting disc, a push block and a spring, wherein the push rod is movably arranged in the inner groove, the push rod extends out of the inner groove in a back-to-back mode, the connecting disc fixedly connected with the push rod is sleeved on the outer wall of the push rod, the spring is arranged in the inner groove, two ends of the spring are fixedly connected with the inner wall of the inner groove and the connecting disc respectively, the push block is formed at one end of the push rod facing the fixed die, and the push block can move out of the inner core along with the push rod.

In a further preferred aspect, the movable mold auxiliary part further comprises a connecting column, a connecting seat, an inclined column and a push plate, wherein one side of the template, which is opposite to the fixed mold, is fixedly connected with the connecting seat by the connecting column, the connecting column penetrates through the base and enables the connecting seat to be movably arranged on the inner side of the base, the inclined column is formed on the inner end surface of the base, penetrates through the push plate and is in sliding connection with the push plate, a chute matched with the push plate is formed on the connecting seat, the length of the chute is greater than that of the push plate, the width of the connecting seat is matched with the width of the push plate, a notch is formed at one end, close to the inclined column, of the connecting seat, the inclined column penetrates out of the notch on the connecting seat, the push plate is arranged on the side of the push rod and is close to the push rod, and one end, close to the push plate, of the push plate is provided with an inclined plane.

In a further preferred embodiment, the back surface of the base is formed with an opening, which is oriented towards the connection socket.

(III) beneficial effects

Compared with the prior art, the utility model provides automatic injection molding production equipment for food packaging boxes, which has the following beneficial effects:

According to the utility model, through the matching arrangement of the fixed die, the movable die auxiliary part and the ejection part, when the plastic packaging box with a circle of skirt edge is processed at the outer edge of the opening part by injection molding, the injection molded plastic packaging box can be completely separated from the movable die through the two ejection processes, so that the smoothness of the demolding process of the plastic packaging box is improved, and the deformation and damage of the plastic packaging box in the demolding process can be reduced.

Drawings

Fig. 1 is a schematic view of a partially cut-away structure of an automatic injection molding production apparatus for food package boxes according to an embodiment;

fig. 2 is a schematic structural view of the automatic injection molding production equipment for the food package boxes in fig. 1;

Fig. 3 is a schematic structural view of the automatic injection molding production device for food package boxes in fig. 1, wherein the fixed mold is omitted and the movable mold and the auxiliary part of the movable mold are cut away;

fig. 4 is a schematic structural diagram of the movable mold auxiliary part in fig. 1 with the fixed mold omitted.

In the figure, 10, a fixed die, 20, a movable die, 21, a base, 22, an inner core, 23, an inner groove, 24, an opening, 30, an auxiliary part of the movable die, 31, a template, 311, a second cavity, 32, a connecting column, 33, a connecting seat, 331, a sliding groove, 34, an inclined column, 35, a push plate, 40, an ejection part, 41, a push rod, 42, a connecting disc, 43, a push block, 44 and a spring are shown.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 4, an automatic injection molding apparatus for producing food package boxes includes a fixed mold 10, a movable mold 20, a movable mold auxiliary portion 30, and an ejector portion 40. The fixed mold 10 is formed with a first cavity communicating with a gate on one side of the movable mold 20, the movable mold auxiliary part 30 comprises a mold plate 31, a second cavity 311 is formed at the center of the mold plate 31, and a complete injection molding cavity is formed between the first cavity and the second cavity 311. The movable mold 20 includes a base 21 and an inner core 22, the inner core 22 is formed at the center of the side of the base 21 facing the fixed mold 10, and the inner core 22 passes through the second cavity 311 and constitutes an injection core. Molten plastic can be injected between the inner core 22 and the injection molding cavity formed by the first cavity and the second cavity 311 for injection molding. An inner groove 23 is formed at the middle portions of the base 21 and the inner core 22, and an ejector 40 is movably installed in the inner groove 23 so that it can be used for ejection of injection molded products after injection molding is completed and cooled.

In this embodiment, the movable mold auxiliary portion 30 further includes a connecting post 32, a connecting seat 33, an inclined post 34, and a push plate 35. The side of the template 31 facing away from the fixed die 10 is fixedly connected with the connecting seat 33 by the connecting column 32, the connecting column 32 penetrates through the base 21 and enables the connecting seat 33 to be movably arranged on the inner side of the base 21, and the connecting seat 33 can drive the connecting column 32 and the template 31 to move along with the connecting seat. The inclined column 34 is formed on the inner end surface of the base 21, the inclined column 34 passes through the push plate 35 and is in sliding connection with the push plate 35, a sliding groove 331 matched with the push plate 35 is formed on the connecting seat 33, the length of the sliding groove 331 is larger than that of the push plate 35, and the width of the connecting seat 33 is matched with that of the push plate 35, so that the connecting seat 33 can drive the push plate 35 to slide in the sliding groove 331 under the guide of the inclined column 34 when moving, and the first ejection of the food packaging box is performed. The push plate 35 is arranged at the side of the push rod 41 and is close to the push rod 41 in the ejection part 40, and one end of the push plate 35 close to the push rod 41 is provided with an inclined surface, so that the push rod 41 can be ejected by the inclined surface at the end part of the push plate 35 after the push plate 35 slides to be close to the push rod 41 in the ejection part 40, and the ejection part 40 performs the ejection for the second time.

In the present embodiment, the back surface of the base 21 is formed with the opening 24, and the opening 24 faces the connection base 33, so that the output end of the driving source can pass through the opening 24 and be connected with the connection base 33, thereby driving the connection base 33 to move.

In the present embodiment, the ejector 40 includes a push rod 41, a connecting disc 42, a push block 43, and a spring 44. The push rod 41 is movably disposed in the inner groove 23, and the movement of the push rod 41 away from the fixed mold 10 extends out of the inner groove 23 so that it can be pushed by the push plate 35. The outer wall of the push rod 41 is sleeved with a connecting disc 42 fixedly connected with the push rod 41, a spring 44 is arranged in the inner groove 23, two ends of the spring 44 are fixedly connected with the inner wall of the inner groove 23 and the connecting disc 42 respectively, the spring 44 can be extruded when the push rod 41 is pushed by the push plate 35, and the spring 44 can be utilized to reset the push rod 41 when the push plate 35 is separated from the push rod 41. A push block 43 is formed on an end of the push rod 41 facing the stationary mold 10 and is embedded in the inner core 22, and the push block 43 can move out of the inner core 22 following the push rod 41 for ejecting the molded food package.

In this embodiment, a notch is further formed at one end of the connecting seat 33 near the inclined post 34, and the inclined post 34 can penetrate out of the notch on the connecting seat 33 to avoid interference between the two.

After the injection molding is finished and cooled, the output end of the driving device drives the connecting seat 33 to move away from the fixed mold 10, so that the movable mold auxiliary part 30 and the ejection part 40 are away from the fixed mold 10. Then, the output end of the driving device drives the connecting seat 33 to move towards the fixed mold 10, in the process, the movement of the template 31 can enable the injection molded food packaging box to be in separated contact with the inner core 22, and at the moment, the whole ejection part 40 moves along with the auxiliary part 30 of the movable mold. In the process of pushing the connecting seat 33, the push plate 35 gradually moves to push the push rod 41, and the push rod 41 drives the push block 43 to push the injection molded food packaging box outwards a certain distance again, so that the skirt edge part at the opening of the injection molded food packaging box can be separated from the template 31. Through the cooperation setting of cover half 10, movable mould 20, movable mould auxiliary part 30 and ejecting portion 40 for when the plastic packaging box that processing opening part outward flange had round shirt rim of moulding plastics, can make injection moulding's plastic packaging box completely separate with movable mould 20 through twice ejecting process, improved the smoothness of plastic packaging box drawing of patterns process, and can reduce the deformation and the damage of plastic packaging box drawing of patterns in-process.

In all the above mentioned solutions, in which the connection between two components can be chosen according to the actual situation, a welded, bolt-and-nut-fitted connection, a bolt-or-screw connection or other known connection means, which are not described in detail herein, where reference is made to a written fixed connection, the preferred consideration is welding, although embodiments of the utility model have been shown and described, it will be understood by those skilled in the art that numerous variations, modifications, substitutions and alterations can be made to these embodiments without departing from the principle and spirit of the utility model, the scope of which is defined by the appended claims and their equivalents.

Claims (6)

1. An automatic injection molding production device for food packaging boxes comprises a fixed die (10) and a movable die (20), and is characterized by also comprising a movable die auxiliary part (30) and an ejection part (40),

A first cavity communicated with a gate is formed on one side of the fixed die (10) facing the movable die (20), the movable die auxiliary part (30) comprises a die plate (31), a second cavity (311) is formed in the center of the die plate (31), and an injection molding cavity is formed between the first cavity and the second cavity (311);

The movable mold (20) comprises a base (21), an inner core (22) and an inner groove (23), wherein the inner core (22) is formed at the center of one side of the base (21) facing the fixed mold (10), and the inner core (22) passes through the second cavity (311) and forms an injection molding core;

The inner groove (23) is formed in the middle of the base (21) and the inner core (22), and the ejection portion (40) is movably installed in the inner groove (23), and the ejection portion (40) is used for ejecting an injection molded product.

2. The automatic injection molding production equipment for food packaging boxes according to claim 1, wherein the ejection part (40) comprises a push rod (41), a connecting disc (42), a push block (43) and a spring (44), the push rod (41) is movably arranged in the inner groove (23), the push rod (41) extends out of the inner groove (23) back to the fixed die (10), the connecting disc (42) fixedly connected with the push rod (41) is sleeved on the outer wall of the push rod (41), the spring (44) is arranged in the inner groove (23) and two ends of the spring are fixedly connected with the inner wall of the inner groove (23) and the connecting disc (42) respectively, the push block (43) is formed at one end of the push rod (41) facing the fixed die (10), and the push block (43) can move out of the inner core (22) along with the push rod (41).

3. The automatic injection molding production equipment for food packaging boxes according to claim 2, wherein the movable mold auxiliary part (30) further comprises a connecting column (32), a connecting seat (33), an inclined column (34) and a pushing plate (35), wherein one side of the mold plate (31) facing away from the fixed mold (10) is fixedly connected with the connecting seat (33) through the connecting column (32), the connecting column (32) penetrates through the base (21) and enables the connecting seat (33) to be movably arranged on the inner side of the base (21), the inclined column (34) is formed on the inner end face of the base (21), and the inclined column (34) penetrates through the pushing plate (35) and is in sliding connection with the pushing plate (35).

4. The automatic injection molding production equipment for food packaging boxes according to claim 3, wherein the connecting seat (33) is provided with a chute (331) matched with the pushing plate (35), the length of the chute (331) is larger than that of the pushing plate (35), the width of the connecting seat (33) is matched with that of the pushing plate (35), one end, close to the inclined column (34), of the connecting seat (33) is further provided with a notch, and the inclined column (34) penetrates out of the notch on the connecting seat (33).

5. The automatic injection molding production equipment for food packaging boxes according to claim 4, wherein the push plate (35) is arranged at the side of the push rod (41) and is close to the push rod (41), and one end of the push plate (35) close to the push rod (41) is provided with an inclined surface.

6. An automatic injection molding apparatus for producing food packages according to any one of claims 3-5, wherein the back of the base (21) is formed with an opening (24), the opening (24) being directed towards the connecting seat (33).