Automatic labeling device in injection mold

Abstract

The utility model relates to the technical field of injection molds, in particular to an automatic labeling device in an injection mold, which comprises a movable mold group and a fixed mold group, cavities are arranged on the front surface of the fixed mold group at equal intervals in an array manner, a joint is fixedly connected to the outer side of the fixed mold group, and the inner side of the joint extends into the fixed mold group. A negative pressure pipe is fixedly connected to the inner side of the connector, a connecting pipe is fixedly connected to the negative pressure pipe, a plurality of inclined rods are fixedly connected to one end of the connecting pipe, and a plurality of adsorption heads are fixedly connected to the inner sides of the inclined rods at equal intervals. According to the utility model, the plurality of adsorption heads surround the outer periphery of the cavity and are communicated with the cavity, so that uniform and stable adsorption force can be obtained in the adsorption process of the in-film pasting, the problem of film pasting displacement or poor pasting caused by non-uniform adsorption is effectively avoided, the positioning precision of the in-film pasting is improved, and the production efficiency is improved. And the stability and the reliability of the film pasting process are greatly enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an automatic labeling device in an injection mold. Background Art

[0002] In-mold labeling is mainly used on plastic products. Before blow molding or injection molding, the printed label is placed in the mold cavity. When the mold is closed, the hot melt adhesive layer on the film is melted by the high temperature and high pressure in the mold, and then it is integrated with the surface of the plastic product. The in-mold label will not separate from the plastic product, replacing the traditional printed label.

[0003] After searching, it was found that the announcement number CN213766950U announced an injection mold for in-mold film. When the movable mold group and the fixed mold group are in a separated state, the operator or the robot grabs the film label and fits the film label on the movable mold plate. The air in the air cavity is extracted by the air pump, so that the mouth of the air hole generates negative pressure to adsorb the film label on the movable mold plate. Suctioning the film label by negative pressure can effectively prevent the film label from moving. However, the number of air holes is limited, so the adsorption of the film label on the mold will be uneven, which will cause the film to fail to fit tightly in some areas and excessive adsorption in other areas, causing the film label to sink into the air hole, and the injected plastic will sink into the air hole, thus affecting the appearance and quality of the product. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides an automatic labeling device in an injection mold, which solves the problem in the prior art that the number of pores is limited, so that the adsorption of the film sticker on the mold will be uneven, resulting in the film sticker failing to fit tightly in some areas and excessive adsorption in other areas, causing the film sticker to sink into the pores, and the injected plastic will sink into the pores, thereby affecting the appearance and quality of the product.

[0005] In order to solve the above-mentioned technical problems, the utility model provides the following technical solutions: an automatic labeling device in an injection mold, comprising a movable mold group and a fixed mold group, the front side of the fixed mold group is provided with a mold cavity in an equidistant array, the outer side of the fixed mold group is fixedly connected to a joint, the inner side of the joint extends to the interior of the fixed mold group, the inner side of the joint is fixedly connected to a negative pressure tube, the negative pressure tube is fixedly connected to a connecting tube, one end of the connecting tube is fixedly connected to a plurality of tilting rods, the inner side of the tilting rods is fixedly connected to a plurality of adsorption heads at equidistant intervals, and the plurality of adsorption heads surround the outer periphery of the mold cavity and are connected thereto.

[0006] Preferably, the plurality of tilting rods are equidistantly arranged in a circle, and the tilting rods fit on the outer periphery of the cavity.

[0007] Preferably, the outer diameter of the adsorption head gradually increases in a direction away from the tilting rod.

[0008] Preferably, a convex ring is provided on the back side of the movable die set, and a limiting groove is provided on the top of the fixed die set, and the convex ring corresponds to the limiting groove.

[0009] Preferably, a first through hole is formed at each of the four corners of the front side of the fixed mold assembly, a second through hole is formed on the back side of the first through hole, and an inner diameter of the first through hole is greater than an inner diameter of the second through hole.

[0010] Preferably, four corners of the back side of the movable mold assembly are fixedly connected with insertion rods, and the insertion rods, the first through hole and the second through hole are located on the same straight line.

[0011] Preferably, a buffer spring and a sliding sleeve are sleeved on the outer surface of the insert rod, one end of the buffer spring abuts against the movable die set, and the other end of the buffer spring abuts against the sliding sleeve.

[0012] Preferably, the outer diameter of the insertion rod is equal to the inner diameter of the second through hole, and the outer diameter of the sliding sleeve is equal to the inner diameter of the first through hole.

[0013] Preferably, a through strip groove is provided on the side of the insertion rod, a sliding rod is fixedly connected to the inside of the sliding sleeve, and the sliding rod is slidably connected to the inside of the strip groove.

[0014] By means of the above technical solution, the utility model provides an automatic labeling device in an injection mold, which has at least the following beneficial effects:

[0015] 1. In the automatic labeling device in the injection mold, the air pump is tightly connected to the joint through the pipeline to ensure the stable transmission of the airflow. When the air pump starts to run, the negative pressure effect generated is quickly transmitted to the inside of the negative pressure tube through the joint, so that a negative pressure environment is formed in the negative pressure tube. This negative pressure is transmitted to the tilt rod through the connecting pipe, and finally acts on the adsorption head to generate a strong suction force. Multiple adsorption heads surround the outer periphery of the cavity and are connected with it, ensuring that the film sticker can obtain uniform and stable adsorption force during the adsorption process, effectively avoiding the problem of film displacement or poor bonding caused by uneven adsorption, which not only improves the positioning accuracy of the film sticker, but also greatly enhances the stability and reliability of the film sticking process.

[0016] 2. In the automatic labeling device in the injection mold, during the mold closing process of the movable mold group and the fixed mold group, the convex ring on the movable mold group will be accurately inserted into the limiting groove of the fixed mold group to achieve the initial positioning and connection between the two. At the same time, the insertion rod will pass through the first through hole and the second through hole in sequence according to the preset path. Since the outer diameter of the first through hole is designed to be larger than the outer diameter of the second through hole, this structural feature effectively limits the position of the sliding sleeve, causing the sliding rod to slide in the strip groove on the insertion rod, and the buffer spring produces a buffering effect on the mold closing process through its elastic deformation, avoiding the impact and vibration caused by direct hard contact, thereby protecting the mold structure, extending the service life, and also improving the accuracy and stability of mold closing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application:

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the local structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the connecting pipe, tilting rod and adsorption head of the utility model.

[0021] Figure 4 This is a schematic diagram of the fixed module structure of the utility model.

[0022] Figure 5 It is a rear view of the movable module structure of the utility model.

[0023] Figure 6 This is a schematic diagram of the rod structure of the utility model.

[0024] In the figure: 1. movable mold assembly; 2. fixed mold assembly; 3. cavity; 4. joint; 5. negative pressure tube; 6. connecting tube; 7. tilting rod; 8. adsorption head; 9. convex ring; 10. limiting groove; 11. first through hole; 12. second through hole; 13. insertion rod; 14. buffer spring; 15. sliding sleeve; 16. sliding rod; 17. strip groove. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-6An automatic labeling device in an injection mold comprises a movable mold group 1 and a fixed mold group 2. The front of the fixed mold group 2 is equidistantly arrayed with a cavity 3. The outer side of the fixed mold group 2 is fixedly connected with a joint 4. The air pump is tightly connected to the joint 4 through a pipeline. The inner side of the joint 4 extends to the inside of the fixed mold group 2. A negative pressure pipe 5 is fixedly connected to the inner side of the joint 4. A connecting pipe 6 is fixedly connected to the negative pressure pipe 5. One end of the connecting pipe 6 is fixedly connected with a plurality of tilting rods 7. The inner side of the tilting rod 7 is equidistantly fixed with a plurality of adsorption heads 8. The plurality of adsorption heads 8 surround the outer periphery of the cavity 3 and are connected thereto. The plurality of tilting rods 7 are equidistantly arranged in a circle, and the tilting rods 7 are attached to the outer periphery of the cavity 3. The outer diameter of the adsorption head 8 gradually increases in the direction away from the tilting rod 7.

[0027] A convex ring 9 is provided on the back of the movable die set 1, and a limiting groove 10 is provided on the top of the fixed die set 2, and the convex ring 9 corresponds to the limiting groove 10. A first through hole 11 is provided at the four corners of the front of the fixed die set 2, and a second through hole 12 is provided on the back of the first through hole 11, and the inner diameter of the first through hole 11 is larger than the inner diameter of the second through hole 12. Insertion rods 13 are fixedly connected to the four corners of the back of the movable die set 1, and the insertion rods 13, the first through hole 11 and the second through hole 12 are located on the same straight line.

[0028] The outer surface of the insert rod 13 is sleeved with a buffer spring 14 and a sliding sleeve 15, one end of the buffer spring 14 abuts on the movable die set 1, and the other end of the buffer spring 14 abuts on the sliding sleeve 15. The outer diameter of the insert rod 13 is equal to the inner diameter of the second through hole 12, and the outer diameter of the sliding sleeve 15 is equal to the inner diameter of the first through hole 11. A through strip groove 17 is provided on the side of the insert rod 13, and a sliding rod 16 is fixedly connected to the inside of the sliding sleeve 15, and the sliding rod 16 is slidably connected to the inside of the strip groove 17.

[0029] Working principle: When the movable die set 1 and the fixed die set 2 are in a separated state, the robot grabs the inner film sticker and attaches it to the inner wall of the cavity 3 of the fixed die set 2;

[0030] The air pump starts to run, and the negative pressure effect generated is quickly transmitted to the inside of the negative pressure tube 5 through the joint 4, so that a negative pressure environment is formed in the negative pressure tube 5. This negative pressure is transmitted to the tilt rod 7 through the connecting tube 6, and finally acts on the adsorption head 8, so that it generates a strong suction force. The multiple adsorption heads 8 surround the outer periphery of the cavity 3 and are connected with it, ensuring that the film can obtain a uniform and stable adsorption force during the adsorption process, effectively avoiding the problem of film displacement or poor adhesion caused by uneven adsorption;

[0031] During the mold closing process between the movable mold assembly 1 and the fixed mold assembly 2, the convex ring 9 on the movable mold assembly 1 will be accurately inserted into the limiting groove 10 of the fixed mold assembly 2 to achieve the initial positioning and connection between the two. At the same time, the insertion rod 13 will pass through the first through hole 11 and the second through hole 12 in sequence according to the preset path. Since the outer diameter of the first through hole 11 is designed to be larger than the outer diameter of the second through hole 12, this structural feature effectively limits the position of the sliding sleeve 15, causing the sliding rod 16 to slide in the strip groove 17 on the insertion rod 13, and the buffer spring 14 has a buffering effect on the mold closing process through its elastic deformation, avoiding the impact and vibration caused by direct hard contact, thereby protecting the mold structure, extending the service life, and also improving the accuracy and stability of mold closing.

[0032] It should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic labeling device in an injection mold, comprising a movable mold assembly (1) and a fixed mold assembly (2), characterized in that: The front side of the fixed mold group (2) is provided with a mold cavity (3) in an equidistant array, the outer side of the fixed mold group (2) is fixedly connected to a joint (4), the inner side of the joint (4) extends to the interior of the fixed mold group (2), the inner side of the joint (4) is fixedly connected to a negative pressure tube (5), the negative pressure tube (5) is fixedly connected to a connecting tube (6), one end of the connecting tube (6) is fixedly connected to a plurality of tilting rods (7), the inner side of the tilting rods (7) is fixedly connected to a plurality of adsorption heads (8) at equidistant intervals, and the plurality of adsorption heads (8) surround the outer periphery of the mold cavity (3) and are connected thereto.

2. The automatic in-mold labeling device according to claim 1, characterized in that: The plurality of tilting rods (7) are arranged equidistantly around the circumference, and the tilting rods (7) are fitted to the outer periphery of the cavity (3).

3. The automatic in-mold labeling device according to claim 1, characterized in that: The outer diameter of the adsorption head (8) gradually increases in a direction away from the tilting rod (7).

4. The automatic in-mold labeling device according to claim 1, characterized in that: The back of the movable die assembly (1) is provided with a convex ring (9), the top of the fixed die assembly (2) is provided with a limiting groove (10), and the convex ring (9) corresponds to the limiting groove (10).

5. The automatic in-mold labeling device according to claim 1, characterized in that: The fixed die assembly (2) is provided with first through holes (11) at four corners on the front side, and a second through hole (12) is provided on the back side of the first through hole (11), wherein the inner diameter of the first through hole (11) is greater than the inner diameter of the second through hole (12).

6. The automatic in-mold labeling device according to claim 5, characterized in that: Insertion rods (13) are fixedly connected to the four corners of the back side of the movable mold assembly (1), and the insertion rods (13), the first through hole (11) and the second through hole (12) are located on the same straight line.

7. The automatic in-mold labeling device according to claim 6, characterized in that: The outer surface of the insert rod (13) is sleeved with a buffer spring (14) and a sliding sleeve (15); one end of the buffer spring (14) abuts against the movable die assembly (1), and the other end of the buffer spring (14) abuts against the sliding sleeve (15).

8. The automatic in-mold labeling device according to claim 7, characterized in that: The outer diameter of the insertion rod (13) is equal to the inner diameter of the second through hole (12), and the outer diameter of the sliding sleeve (15) is equal to the inner diameter of the first through hole (11).

9. The automatic in-mold labeling device according to claim 8, characterized in that: A through strip groove (17) is provided on the side of the insertion rod (13), a sliding rod (16) is fixedly connected inside the sliding sleeve (15), and the sliding rod (16) is slidably connected inside the strip groove (17).

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