Injection molding coining mold

Abstract

The utility model relates to an injection molding imprint mould which comprises an upper mould, a lower mould and an imprint mould, the lower end of the upper mould is provided with a forming groove, the upper end of the lower mould is provided with a forming table, an injection molding cavity is formed between the forming groove and the forming table when the upper mould and the lower mould abut against each other up and down, and the side face of the upper mould is provided with an injection molding opening communicated with the injection molding cavity. The coining die is installed in the forming groove, and the lower end face of the coining die is flush with the forming groove. Plastic is formed on the surface of the coining mold in a coining mode, the coining mold adopts a laser engraving technology and is customized according to product patterns, different patterns under injection molding of the same model are achieved by replacing the coining mold, the requirement for brand or pattern diversification is met, and the mold manufacturing cost is reduced. During demolding, the coining mold is firstly separated from the plastic part, so that the plastic part is prevented from being entrained by patterns of the coining mold, and continuous production is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, and particularly relates to an injection molding and embossing mold. Background Art

[0002] Injection molding is a method for producing industrial product shapes. Products usually use rubber injection molding and plastic injection molding. In the toy industry, plastic toys are more suitable for young children compared to toys made of other materials. When producing plastic products, plastic products usually need to be printed with different patterns according to design requirements. Therefore, multiple sets of molds need to be manufactured to achieve batch production of plastic parts with different food patterns, resulting in higher production costs. Moreover, the plastic parts with patterns are easily caught by the patterns of the mold during demolding, which affects the demolding of the plastic parts and further affects the continuous production. Content of the Utility Model

[0003] To solve the above technical problems, the utility model provides an injection molding and embossing mold, which can not only meet the requirements of diverse product patterns, reduce production and manufacturing costs, but also ensure the smooth demolding of plastic parts.

[0004] The technical solution of the utility model is as follows: an injection molding and embossing mold, including an upper mold, a lower mold and an embossing mold. A forming groove is provided at the lower end of the upper mold, and a forming table is provided at the upper end of the lower mold. When the upper mold and the lower mold are abutted against each other up and down, an injection molding cavity is formed between the forming groove and the forming table. An injection port communicating with the injection molding cavity is provided on the side of the upper mold. The embossing mold is installed in the forming groove, and the lower end surface of the embossing mold is flush with the forming groove.

[0005] Further, a pull ring is threadedly connected to the upper end of the embossing mold.

[0006] Further, a sliding groove is provided at the upper end of the upper mold. The sliding groove communicates with the forming groove. A limiting platform is provided at the lower end of the sliding groove. The embossing mold can be slidably inserted into the sliding groove and installed on the limiting platform.

[0007] Further, guide rails are provided on the side of the sliding groove, and guide grooves are provided on the side of the embossing mold. The guide rails are slidably connected to the guide grooves.

[0008] Further, an air groove is provided at the upper end of the limiting platform. A first air valve communicating with the air groove is provided outside the upper mold. A sealing plate is provided at the upper end of the sliding groove. A second air valve is provided on the sealing plate. An air cavity is formed between the sealing plate in the sliding groove and the embossing mold.

[0009] Further, the sealing plate and the upper mold are connected by screws.

[0010] Further, a groove is provided at the upper end of the forming table. A channel leading to the lower end face of the lower die is provided in the middle of the groove. A ejector rod is slidably connected in the channel. The upper end of the ejector rod is erected in the groove and has a shape corresponding to the groove. An activity groove is provided in the middle of the channel, and an activity block is provided in the middle of the ejector rod. The activity block is slidably connected in the activity groove.

[0011] Further, a third air valve is provided at the lower end of the channel.

[0012] Further, positioning holes are provided at the upper end of the lower die, and positioning pins are provided at the lower end of the upper die. The positioning pins can be slidably inserted into the positioning holes.

[0013] Further, both the groove and the upper end of the ejector rod are circular.

[0014] Compared with the prior art, the advantages of the present utility model are as follows: The plastic is imprinted and formed on the surface of the imprinting die. The imprinting die adopts laser engraving technology and is customized according to the product pattern. Different patterns under the same model of injection molding can be achieved by replacing the imprinting die, meeting the needs of brand or pattern diversification and reducing the mold manufacturing cost; when demolding, the imprinting die is first separated from the plastic part, avoiding the pattern of the imprinting die from entraining the plastic part and ensuring the continuous production. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 is an exploded view of the present utility model;

[0017] Figure 2 is a top view of the lower die of the present utility model;

[0018] Figure 3 is Figure 2 an enlarged view of part A in

[0019] Figure 4 is a bottom view of the lower die of the present utility model;

[0020] Figure 5 is a working principle diagram of the present utility model.

[0021] Wherein: 1. Lower die; 2. Upper die; 3. Embossing die; 4. Sealing plate; 5. Forming table; 6. Forming groove; 7. Positioning hole; 8. Positioning pin; 9. Sliding groove; 10. Air cavity; 11. Guide rail; 12. Guide groove; 13. Pull ring; 14. Limit table; 15. Air groove; 16. Groove; 17. Ejector rod; 18. Movable groove; 19. Movable block; 20. Channel; 21. First air valve; 22. Second air valve; 23. Third air valve; 24. Injection port. Detailed implementation mode

[0022] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following, in conjunction with the attached drawings and preferred embodiments, details the specific implementation mode, structure, features and their effects of the present invention as follows.

[0023] As Figures 1-5 shown, an injection embossing mold includes an upper die 2, a lower die 1 and an embossing die 3. The lower end of the upper die 2 is provided with a forming groove 6, and the upper end of the lower die 1 is provided with a forming table 5. When the upper die 2 and the lower die 1 are in contact with each other up and down, an injection molding cavity is formed between the forming groove 6 and the forming table 5. An injection port 24 communicating with the injection molding cavity is provided on the side of the upper die 2. After the plastic is heated to a temperature with a certain fluidity, it is injected into the injection molding cavity through the injection port 24 to form a plastic part. The embossing die 3 is installed in the forming groove 6, and the lower end surface of the embossing die 3 is flush with the forming groove 6. The plastic is embossed on the surface of the embossing die 3. The embossing die 3 adopts laser engraving technology and is customized according to product requirements or LOGO styles. By replacing the embossing die 3, different LOGO styles under the same model injection molding can be realized, meeting the diverse needs of brands or LOGOs and reducing the mold manufacturing cost.

[0024] In the above embodiment, a pull ring 13 is threadedly connected to the upper end of the embossing die 3 to provide a force application point and facilitate the operation of workers when loading and unloading the embossing die 3. A sliding groove 9 is provided at the upper end of the upper die 2. The sliding groove 9 communicates with the forming groove 6. A limit table 14 is provided at the lower end of the sliding groove 9. The embossing die 3 can be slidably inserted into the sliding groove 9 and mounted on the limit table 14, which can not only provide positioning and alignment for the embossing die 3, but also provide good sealing performance to prevent the plastic from squeezing into the extremely small gap between the upper die 2 and the embossing die 3. A guide rail 11 is provided on the side of the sliding groove 9, and a guide groove 12 is provided on the side of the embossing die 3. The guide rail 11 and the guide groove 12 are slidably connected, which can also provide positioning and alignment for the embossing die 3. When the embossing die 3 is circular, it can prevent relative rotation and ensure the accuracy of embossing; the corresponding guide rail 11 and guide groove 12 can be asymmetrically distributed to limit the LOGO direction of the embossing die 3 and ensure the consistency of the product.

[0025] In the above embodiments, an air groove 15 is provided at the upper end of the limit table 14, a first air valve 21 communicating with the air groove 15 is provided outside the upper die 2, a sealing plate 4 is provided at the upper end of the sliding groove 9, a second air valve 22 is provided on the sealing plate 4, and an air cavity 10 is formed between the sealing plate 4 in the sliding groove 9 and the embossing die 3. The second air valve 22 is connected to a first external air pump, and positive and negative pressures are formed in the air cavity 10 by the first external air pump to push and pull the embossing die 3 up and down; when the first external air pump pumps air, a negative pressure is formed in the air cavity 10, the embossing die 3 rises and leaves the plastic part, and also leaves the surface of the air groove 15 at the same time. External air passes through the first air valve 21 and the air groove 15 to balance the others between the plastic part and the embossing die 3, making it easier to separate the embossing die 3 from the plastic part; in addition, the first air valve 21 can also be connected to a second external air pump to assist the embossing die 3 to lift and lower through the second external air pump. The sealing plate 4 and the upper die 2 are connected by screws to further enhance the sealing performance of the air cavity 10 and the stability of the installation of the sealing plate 4, preventing the sealing plate 4 from being pushed out by the air pressure in the air cavity 10 or the air cavity 10 from leaking air when the first external air pump is started. A groove 16 is provided at the upper end of the forming table 5, a channel 20 leading to the lower end surface of the lower die 1 is provided in the middle of the groove 16, a ejector rod 17 is slidably connected in the channel 20, the upper end of the ejector rod 17 is erected in the groove 16 and its shape corresponds to the groove 16. An activity groove 18 is provided in the middle of the channel 20, an activity block 19 is provided in the middle of the ejector rod 17, and the activity block 19 is slidably connected in the activity groove 18. When the plastic part is demolded, the ejector rod 17 can be used to eject it, which is convenient and fast; at the same time, a third air valve 23 is provided at the lower end of the channel 20, which can be connected to a third external air pump, and the activity block 19 is made to move up and down in the activity groove 18 through the action of the air pump, forming the functions of pushing out and resetting the ejector rod 17 to realize the rapid demolding of the plastic part. A positioning hole 7 is provided at the upper end of the lower die 1, and a positioning pin 8 is provided at the lower end of the upper die 2. The positioning pin 8 can be slidably inserted into the positioning hole 7 to improve the accuracy of the mold closing of the upper die 2 and the lower die 1 and ensure that the wall thicknesses of all parts of the plastic part are consistent. Both the groove 16 and the upper end of the ejector rod 17 are circular, which is not easy to scratch when ejecting the plastic part. A blowing device can also be installed on the side of this mold. After the ejector rod 17 ejects the plastic part, the plastic part is blown off by the blowing device, and the circular ejector rod 17 can also avoid its mutual influence with the plastic part, which helps the plastic part to fall off.

[0026] Description of the working mode of the present utility model:

[0027] When producing plastic products for playing house in the shape of a bowl, different food patterns need to be printed on the bottom of the plastic products. An embossing die 3 with different food patterns is engraved by laser, and plastic parts with different food patterns are produced in batches. In the preparatory work, the upper die 2 and the lower die 1 are installed in the injection molding equipment, and the first air valve 21, the second air valve 22 and the third air valve 23 are respectively connected to the second external air pump, the first external air pump and the third external air pump; the embossing die 3 is slid into the sliding groove 9 from above the upper die 2 and abuts against the limiting platform 14, and it is checked whether the embossing die 3 can be installed in place, and then the sealing plate 4 can be covered on the upper end of the sliding groove 9 and fastened and sealed with screws. Before injection molding starts, first, the first external air pump and the second air valve 22 are used to pump air into the air cavity 10, so that the positive pressure in the air cavity 10 firmly presses the embossing die 3 against the limiting platform 14. Subsequently, the second external air pump and the first air valve 21 are used to evacuate the air groove 15, so that the combination between the embossing die 3 and the limiting platform 14 is closer; at the same time, the third external air pump and the third air valve 23 adsorb the movable block 19 through the channel 20, so that the upper end of the ejector rod 17 closely adheres to the groove 16. After injection molding starts, plastic with sufficient fluidity is injected into the injection mold cavity through the injection port 24 and pressurized, so that the plastic fills every corner of the injection mold cavity, and a food concave printing pattern is formed at the embossing die 3. After the plastic cools, it is demolded; during demolding, the first external air pump evacuates the air cavity 10, and at the same time the second external air pump blows air into the air groove 15, jointly lifting the embossing die 3, so that the embossing die 3 is first separated from the plastic part. Subsequently, the upper die 2 moves upward through the injection molding equipment, and the upper die 2 and the lower die 1 are separated. At this time, since the embossing die 3 has left the surface of the plastic part, the contact area between the lower die 1 and the plastic part is larger than the contact area between the upper die 2 and the plastic part. Under the action of gravity and friction, the plastic part remains on the forming table 5 of the lower die 1 and will not be caught in the forming groove 6 of the upper die 2, avoiding affecting continuous injection molding; immediately afterwards, the third external air pump is used to push the ejector rod 17 to eject the plastic part sleeved on the forming table 5. Subsequently, the plastic part is blown obliquely upward by an external blowing device, so that the mold is separated from the ejector rod 17 and falls into the collection box beside the injection molding equipment, completing one injection molding work; after completion, the first external air pump, the second external air pump and the third external air pump are used to reset the ejector rod 17 and the embossing die 3, and then the next injection molding work can be carried out. After a bowl-shaped plastic part with a food pattern is obtained through continuous operation, by replacing the embossing die 3, a bowl-shaped plastic part with the next food pattern is manufactured, and finally a complete set of plastic products for playing house in the shape of a bowl is formed.

[0028] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An injection molding die, comprising an upper die, a lower die and an embossing die, characterized in that: A molding groove is provided at the lower end of the upper mold, and a molding table is provided at the upper end of the lower mold. When the upper mold and the lower mold are pressed against each other, an injection cavity is formed between the molding groove and the molding table. An injection port connected to the injection cavity is provided on the side of the upper mold. The stamping mold is installed in the molding groove, and the lower end surface of the stamping mold is flush with the molding groove.

2. The injection molding die according to claim 1, characterized in that: The upper end of the stamping die is threadedly connected with a pull ring.

3. The injection molding die according to claim 1, characterized in that: The upper end of the upper mold is provided with a sliding groove, the sliding groove is connected with the molding groove, and the lower end of the sliding groove is provided with a limiting platform. The stamping mold can be slidably embedded in the sliding groove and mounted on the limiting platform.

4. The injection molding die according to claim 3, characterized in that: A guide rail is provided on the side of the sliding groove, and a guide groove is provided on the side of the stamping die. The guide rail is slidably connected with the guide groove.

5. The injection molding die according to claim 3, characterized in that: An air groove is provided at the upper end of the limit platform, a first air valve communicating with the air groove is provided on the outer side of the upper mold, a sealing plate is provided at the upper end of the sliding groove, a second air valve is provided on the sealing plate, and an air cavity is formed between the sealing plate in the sliding groove and the stamping mold.

6. The injection molding die according to claim 5, characterized in that: The sealing plate is connected to the upper mold via screws.

7. The injection molding die according to claim 1, characterized in that: A groove is provided at the upper end of the forming table, a channel leading to the lower end surface of the lower mold is provided in the middle of the groove, a push rod is slidably connected in the channel, the upper end of the push rod is mounted in the groove and has a shape corresponding to the groove, a movable groove is provided in the middle of the channel, a movable block is provided in the middle of the push rod, and the movable block is slidably connected in the movable groove.

8. The injection molding die according to claim 7, characterized in that: A third air valve is arranged at the lower end of the channel.

9. The injection molding die according to claim 7, characterized in that: The groove and the upper end of the push rod are both circular.

10. The injection molding die according to claim 1, characterized in that: The upper end of the lower mold is provided with a positioning hole, and the lower end of the upper mold is provided with a positioning pin, and the positioning pin can be slidably embedded in the positioning hole.

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