Double-color plastic product secondary forming injection mold

Abstract

The utility model relates to the technical field of injection molds, in particular to a double-color plastic product secondary forming injection mold which comprises a first forming mechanism, the first forming mechanism comprises an upper mold, a first through hole is formed in the left side surface of the upper mold, an upper groove is formed in the surface of the upper mold, and a second forming mechanism is installed on the right side surface of the upper mold. The second forming mechanism comprises a lower die, a lower groove is formed in the surface of the lower die, the upper groove and the lower groove form a first groove, a rotating mechanism is installed on the right side surface of the lower die and comprises a rotating shaft, the tail end of the rotating shaft is fixedly connected with the right side surface of the lower die, and the other end of the rotating shaft is fixedly connected with a motor. A connecting mechanism is installed on the right side surface of the upper die and comprises a second connecting plate, and the left side surface of the second connecting plate is fixedly connected with the right side surface of the upper die. According to the secondary injection molding device, secondary injection molding is completed by changing the size of the first groove, a workpiece does not need to be taken down and reinstalled, and the working efficiency of the device is improved.

Description

Technical Field

[0001] The utility model relates to the field of injection molds, in particular to a two-color plastic product secondary molding injection mold. Background Technique

[0002] Injection molding is a method for producing industrial product shapes. Products usually use rubber injection molding and plastic injection molding. Injection molding can also be divided into injection molding, compression molding and die-casting methods. An injection molding machine (abbreviation: injection machine or injection molding machine) is the main molding equipment for making various shaped plastic products from thermoplastic or thermosetting materials. Injection molding is achieved through an injection molding machine and a mold.

[0003] In the common secondary molding injection molding on the market, since the plastic product is two-color, during injection molding, the workpiece needs to be taken off after the first color is injected, placed in a new mold, and then the other color is injected, and the position of the workpiece needs to be adjusted, which is time-consuming and reduces the working efficiency of the device. Summary of the Invention

[0004] The purpose of the utility model is to solve the defects existing in the prior art, and to propose a two-color plastic product secondary molding injection mold.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: a two-color plastic product secondary molding injection mold, including a first molding mechanism, the first molding mechanism includes an upper mold, a first through hole is opened on the left side surface of the upper mold, an upper groove is opened on the surface of the upper mold, a second molding mechanism is installed on the right side surface of the upper mold, the second molding mechanism includes a lower mold, the left side surface of the lower mold is attached to the right side surface of the upper mold, a lower groove is opened on the surface of the lower mold, the upper groove and the lower groove form a first groove, a rotating mechanism is installed on the right side surface of the lower mold, the rotating mechanism includes a rotating shaft, the end of the rotating shaft is fixedly connected to the right side surface of the lower mold, the other end of the rotating shaft is fixedly connected to a motor, and a connecting mechanism is installed on the right side surface of the upper mold, the connecting mechanism includes a second connecting plate, and the left side surface of the second connecting plate is fixedly connected to the right side surface of the upper mold.

[0006] As a further description of the above technical solution:

[0007] The number of the first through holes, upper grooves and lower grooves is two, and they are symmetrically distributed with the rotating shaft as the center, and the volume of the upper groove close to the second connecting plate is smaller than the volume of the upper groove far from the second connecting plate.

[0008] As a further description of the above technical solution:

[0009] The connecting mechanism further includes a first connecting plate, which is located inside the lower die, and the left surface of the first connecting plate is in contact with the right surface of the upper die.

[0010] As a further description of the above technical solution:

[0011] A second groove is formed on the left surface of the lower die, and a first spring is fixedly connected to the inner wall of the second groove. The end of the first spring is fixedly connected to the right surface of the first connecting plate.

[0012] As a further description of the above technical solution:

[0013] A pushing mechanism is installed on the right surface of the lower die. The pushing mechanism includes a fixing plate, the left surface of the fixing plate is fixedly connected to the right surface of the lower die, and a cylinder is fixedly connected to the left surface of the fixing plate.

[0014] As a further description of the above technical solution:

[0015] A second through hole is formed on the surface of the lower die, and the cylinder passes through the second through hole and extends to the left side of the lower die. The output end of the cylinder is fixedly connected to a pushing plate.

[0016] As a further description of the above technical solution:

[0017] Two guiding mechanisms are installed on the left surface of the upper die. The guiding mechanism includes a first connecting block, the right surface of the first connecting block is fixedly connected to the left surface of the upper die, and a second connecting block is installed on the left surface of the first connecting block.

[0018] As a further description of the above technical solution:

[0019] A third groove is formed on the left surface of the first connecting block, and a second spring is fixedly connected to the inner wall of the third groove. The end of the second spring is fixedly connected to the right surface of the second connecting block.

[0020] The utility model has the following beneficial effects:

[0021] 1. Compared with the prior art, for this secondary molding injection mold for two-color plastic products, through the motor, the upper mold, the lower mold, the first groove and the second connecting plate, by injecting into the first through hole opened on the surface of the upper mold, the workpiece is preliminarily formed inside the first groove. By driving the lower mold to rotate with the motor and using the second connecting plate to change the size of the first groove, the secondary injection of the workpiece is completed. In contrast to conventional devices, since this plastic product is two-color during production, when injecting, the workpiece needs to be removed after injecting the first color, placed into a new mold and then injected with the other color, and the position of the workpiece needs to be adjusted, which is time-consuming and reduces the working efficiency of the device. Through the above structural design, the present utility model changes the size of the first groove to perform two injections without removing and reinstalling the workpiece, thus improving the working efficiency of the device.

[0022] 2. Compared with the prior art, for this secondary molding injection mold for two-color plastic products, through the first connecting block, the second connecting block, and the second spring, during use, the injection device is placed into the second connecting block, and the second spring fixed on the right surface of the second connecting block is compressed into the third groove opened on the first connecting block fixed on the left surface of the upper mold, which can prevent the injection port of the injection device from colliding with the surface of the first through hole opened on the upper mold, prevent damage to the gate, and improve the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the overall structural schematic diagram of the present utility model;

[0024] Figure 2 is the cross-sectional view of the present utility model;

[0025] Figure 3 is the internal structural schematic diagram of the present utility model;

[0026] Figure 4 is Figure 3 the enlarged view of the structure at A of

[0027] LEGEND DESCRIPTION:

[0028] 1. First forming mechanism; 101. Upper mold; 102. First through hole; 103. First groove; 2. Connecting mechanism; 201. First connecting plate; 202. First spring; 203. Second connecting plate; 3. Second forming mechanism; 301. Lower mold; 302. Second groove; 303. Second through hole; 4. Rotating mechanism; 401. Motor; 402. Rotating shaft; 5. Pushing mechanism; 501. Fixed plate; 502. Cylinder; 503. Pushing plate; 6. Guiding mechanism; 601. First connecting block; 602. Second connecting block; 603. Second spring; 604. Third groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clear and understandable, the following further details this application in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.

[0030] Referring to Figures 1-4 , a two-color plastic product secondary molding injection mold provided by the utility model: includes a first molding mechanism 1, the first molding mechanism 1 includes an upper mold 101, a first through hole 102 is opened on the left surface of the upper mold 101, an upper groove is opened on the surface of the upper mold 101, a second molding mechanism 3 is installed on the right surface of the upper mold 101, the second molding mechanism 3 includes a lower mold 301, the left surface of the lower mold 301 is attached to the right surface of the upper mold 101, a lower groove is opened on the surface of the lower mold 301, and the upper groove and the lower groove form a first groove 103, a rotating mechanism 4 is installed on the right surface of the lower mold 301, the rotating mechanism 4 includes a rotating shaft 402, the end of the rotating shaft 402 is fixedly connected to the right surface of the lower mold 301, the other end of the rotating shaft 402 is fixedly connected to a motor 401, a connecting mechanism 2 is installed on the right surface of the upper mold 101, the connecting mechanism 2 includes a second connecting plate 203, the left surface of the second connecting plate 203 is fixedly connected to the right surface of the upper mold 101, when the upper mold 101 is attached to the lower mold 301, the second connecting plate 203 is inserted into the lower groove.

[0031] In this embodiment, the number of the first through holes 102, upper grooves, and lower grooves is two, which are symmetrically distributed around the rotating shaft 402, and the volume of the upper groove close to the second connecting plate 203 is smaller than the volume of the upper groove far from the second connecting plate 203.

[0032] Specifically, by injecting plastic into the first through hole 102 opened on the surface of the upper mold 101, the workpiece is initially formed inside the first groove 103. Since the second connecting plate 203 above the first groove 103 is inserted into the lower groove, the size of the first groove 103 is the area size of the single-color workpiece. After the workpiece is formed, move the upper mold 101 to the left so that the upper mold 101 is not in contact with the surface of the workpiece, and then start the motor 401. The motor 401 drives the rotating shaft 402 fixed to the output end of the motor 401 to rotate, and the lower mold 301 fixed to the end of the rotating shaft 402 rotates accordingly, and the workpiece in the lower mold 301 also rotates accordingly. When it rotates to the set position, the upper mold 101 moves to the right again and closely fits with the left surface of the lower mold 301. Since the second connecting plate 203 does not exist, the volume of the first groove 103 becomes larger, and inject plastic into the first through hole 102 to complete the secondary injection of the workpiece. Through the above structural design, the size of the first groove 103 is changed for two injections, and it is not necessary to remove the workpiece and reinstall it, improving the working efficiency of the device.

[0033] Such as Figure 2As shown, the connecting mechanism 2 further includes a first connecting plate 201. The first connecting plate 201 is located inside the lower die 301. The left surface of the first connecting plate 201 is in contact with the right surface of the upper die 101. A second groove 302 is formed on the left surface of the lower die 301. A first spring 202 is fixedly connected to the inner wall of the second groove 302. The end of the first spring 202 is fixedly connected to the right surface of the first connecting plate 201. The above structural design is used to buffer the stress generated when the upper die 101 contacts the lower die 301.

[0034] As Figures 1-3 shown, a pushing mechanism 5 is installed on the right surface of the lower die 301. The pushing mechanism 5 includes a fixing plate 501. The left surface of the fixing plate 501 is fixedly connected to the right surface of the lower die 301. A cylinder 502 is fixedly connected to the left surface of the fixing plate 501. A second through hole 303 is formed on the surface of the lower die 301. The cylinder 502 passes through the second through hole 303 and extends to the left side of the lower die 301. The output end of the cylinder 502 is fixedly connected to a pushing plate 503. After the workpiece inside the device is formed, the cylinder 502 is started. The cylinder 502 extends, so that the pushing plate 503 fixed to the output end moves to the left, and the internally formed workpiece is pushed out.

[0035] As Figure 4 shown, two guiding mechanisms 6 are installed on the left surface of the upper die 101. Each guiding mechanism 6 includes a first connecting block 601. The right surface of the first connecting block 601 is fixedly connected to the left surface of the upper die 101. A second connecting block 602 is installed on the left surface of the first connecting block 601. A third groove 604 is formed on the left surface of the first connecting block 601. A second spring 603 is fixedly connected to the inner wall of the third groove 604. The end of the second spring 603 is fixedly connected to the right surface of the second connecting block 602;

[0036] Put the injection device into the second connecting block 602. The second spring 603 fixed to the right surface of the second connecting block 602 is compressed into the third groove 604 formed on the first connecting block 601 fixed to the left surface of the upper die 101, which can prevent the injection port of the injection device from colliding with the surface of the first through hole 102 formed on the upper die 101, prevent the gate from being damaged, and improve the service life of the device.

[0037] Working principle of the utility model: Place the injection device into the second connecting block 602, and perform injection molding through the first through hole 102 formed on the surface of the upper mold 101, so that the workpiece is initially formed inside the first groove 103. Since the second connecting plate 203 above the first groove 103 is fixedly connected to the right surface of the upper mold 101, when the second connecting plate 203 is inserted into the lower groove, the size of the first groove 103 is the area size of the single-color workpiece. After the workpiece is formed, move the upper mold 101 to the left so that the upper mold 101 is not in contact with the surface of the workpiece. Then start the motor 401, and the motor 401 drives the rotation of the rotating shaft 402 fixed to the output end of the motor 401. The lower mold 301 fixed to the end of the rotating shaft 402 rotates accordingly, and the workpiece in the lower mold 301 also rotates accordingly. After rotating to the set position, the upper mold 101 moves to the right again and closely fits with the left surface of the lower mold 301. At this time, the second connecting plate 203 above the first groove 103 does not exist, and the size of the first groove 103 becomes larger. Inject into the first through hole 102 to complete the secondary injection molding of the workpiece. By changing the size of the first groove 103 for two injection moldings, it is not necessary to remove the workpiece and reinstall it, improving the working efficiency of the device.

[0038] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A two-color plastic product secondary molding injection mold, comprising a first molding mechanism (1), characterized in that: The first molding mechanism (1) comprises an upper mold (101), a first through hole (102) is provided on the left side surface of the upper mold (101), an upper groove is provided on the surface of the upper mold (101), a second molding mechanism (3) is installed on the right side surface of the upper mold (101), and the second molding mechanism (3) comprises a lower mold (301), a left side surface of the lower mold (301) is in contact with the right side surface of the upper mold (101), a lower groove is provided on the surface of the lower mold (301), and the upper groove and the lower groove constitute a first groove (103). ), a rotating mechanism (4) is installed on the right side surface of the lower mold (301), the rotating mechanism (4) comprises a rotating shaft (402), the end of the rotating shaft (402) is fixedly connected to the right side surface of the lower mold (301), the other end of the rotating shaft (402) is fixedly connected to the motor (401), and a connecting mechanism (2) is installed on the right side surface of the upper mold (101), the connecting mechanism (2) comprises a second connecting plate (203), the left side surface of the second connecting plate (203) is fixedly connected to the right side surface of the upper mold (101).

2. A two-color plastic product secondary molding injection mold according to claim 1, characterized in that: The number of the first through hole (102), the upper groove and the lower groove are all two, and they are symmetrically distributed with the rotating shaft (402) as the center, and the volume of the upper groove adjacent to the second connecting plate (203) is smaller than the volume of the upper groove away from the second connecting plate (203).

3. The double-color plastic product secondary molding injection mold according to claim 1, characterized in that: The connection mechanism (2) further comprises a first connection plate (201), wherein the first connection plate (201) is located inside the lower mould (301), and the left surface of the first connection plate (201) is in contact with the right surface of the upper mould (101).

4. The double-color plastic product secondary molding injection mold according to claim 3, characterized in that: A second groove (302) is provided on the left side surface of the lower mold (301), a first spring (202) is fixedly connected to the inner wall of the second groove (302), and the end of the first spring (202) is fixedly connected to the right side surface of the first connecting plate (201).

5. The double-color plastic product secondary molding injection mold according to claim 4, characterized in that: An ejection mechanism (5) is installed on the right side surface of the lower mold (301), and the ejection mechanism (5) comprises a fixed plate (501), the left side surface of the fixed plate (501) is fixedly connected to the right side surface of the lower mold (301), and the left side surface of the fixed plate (501) is fixedly connected to a cylinder (502).

6. The double-color plastic product secondary molding injection mold according to claim 5, characterized in that: A second through hole (303) is provided on the surface of the lower die (301), the cylinder (502) passes through the second through hole (303) and extends to the left side of the lower die (301), and a push plate (503) is fixedly connected to the output end of the cylinder (502).

7. The double-color plastic product secondary molding injection mold according to claim 1, characterized in that: Two guide mechanisms (6) are installed on the left side surface of the upper mold (101), and the guide mechanism (6) comprises a first connecting block (601), the right side surface of the first connecting block (601) is fixedly connected to the left side surface of the upper mold (101), and the left side surface of the first connecting block (601) is installed with a second connecting block (602).

8. The double-color plastic product secondary molding injection mold according to claim 7, characterized in that: A third groove (604) is provided on the left side surface of the first connecting block (601), a second spring (603) is fixedly connected to the inner wall of the third groove (604), and the end of the second spring (603) is fixedly connected to the right side surface of the second connecting block (602).

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