Insert injection mold

Abstract

The utility model relates to the technical field of injection molding equipment, and provides an insert injection mold which comprises an upper mold and a lower mold which are matched with each other, an exhaust groove is formed in the lower mold to exhaust gas in a mold cavity, and a plurality of injection molding pipes are arranged at the top of the upper mold and are used for injecting molten raw materials into the mold cavity formed when the upper mold and the lower mold are closed at the same time. The injection mold overcomes the defects in the prior art, is reasonable in design and compact in structure, and the upper mold and the lower mold can synchronously rotate after injection molding is completed, so that molten raw materials can be quickly and comprehensively filled in the mold cavity, the uniformity of raw material distribution is ensured, air generated in the injection molding process can be smoothly exhausted, and the service life of the injection mold is prolonged. Therefore, the overall quality and the yield of injection molding products are greatly improved. The lifting rod moves up and down, so that the upper mold and the lower mold can rotate synchronously, mold closing or mold splitting work can be completed, other equipment is not needed, operation is easy, and the equipment cost is saved.

Description

Technical Field

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

[0002] An insert injection mold is a special injection mold that allows inserts made of metal, plastic, or other materials to be pre-placed in the mold during the injection process and then integrated with the injection material to form components with specific functions or structures.

[0003] Chinese Utility Model Patent with the application number: CN202321244542.4 discloses: A rapid cooling injection mold, including a lower mold, an upper mold is closed on the top of the lower mold. A forming cavity is opened in the middle position of the side walls facing each other of the lower mold and the upper mold. The two forming cavities are arranged symmetrically up and down. A group of injection holes are opened on the top wall of the upper forming cavity. The group of injection holes are three and are arranged horizontally at equal distances. An injection pipe is fixedly installed on the top of the upper mold and at the opening of each injection hole.

[0004] The above structure fills the mold cavity with molten plastic liquid quickly through three injection holes to improve the injection molding efficiency. However, if the injection is too fast, it may cause the gas generated during injection to be difficult to discharge from the mold, thereby affecting the injection quality. For this reason, we propose an insert injection mold. Summary of the Utility Model

[0005] (1) Technical Problems to be Solved

[0006] Aiming at the deficiencies of the prior art, the utility model provides an insert injection mold to solve the above problems existing in the prior art.

[0007] (2) Technical Solutions

[0008] To achieve the above objectives, the utility model is realized through the following technical solutions: An insert injection mold includes an upper mold and a lower mold that are cooperatively arranged. An exhaust groove is opened on the lower mold to discharge the gas in the mold cavity. A plurality of injection pipes are provided on the top of the upper mold for injecting molten raw materials into the mold cavity formed when the upper mold and the lower mold are closed at the same time;

[0009] A receiving cavity is opened on the top of the upper mold. A lifting rod is inserted into the receiving cavity. A spiral protrusion is provided on the outer wall of the lifting rod. A spiral groove matching the spiral protrusion is opened in the cylindrical cavity of the receiving cavity. Through the up and down lifting movement of the lifting rod, the spiral protrusion on it cooperates with the spiral groove in the receiving cavity to make the upper mold rotate along the axis of the lifting rod.

[0010] Further, the upper mold is a convex mold, the lower mold is a concave mold, and the exhaust groove is opened on the parting surface of the lower mold.

[0011] Further, a support platform is provided at the bottom of the lower mold. The lower mold is rotatably arranged on the support platform, and the bottom of the lower mold is connected to the support platform through a connecting spring.

[0012] Further, a support spring is provided at the bottom inside the accommodation cavity. A support plate is provided at the top of the support spring. The support plate abuts against the bottom of the lifting rod. An upwardly extending positioning sleeve is provided at the top of the upper mold. The positioning sleeve is sleeved on the outer wall of the lifting rod. A convex ring is provided on the outer wall of the lifting rod located in the limiting groove of the positioning sleeve. The diameter of the top inside the limiting groove is smaller than the diameter of the convex ring to prevent the lifting rod from moving upward and disengaging from the positioning sleeve.

[0013] Further, a positioning rod is provided on the upper mold, and a positioning groove for mating with the positioning rod is formed in the lower mold. When the upper mold and the lower mold are closed, the positioning rod is inserted into the positioning groove to achieve precise alignment of the upper mold and the lower mold and subsequent synchronous rotation.

[0014] Further, the injection tube is a flexible tube to allow the upper mold to rotate after injection molding.

[0015] (III) Beneficial Effects

[0016] The embodiment of the present utility model provides an insert injection mold, which has the following beneficial effects:

[0017] 1. After injection molding, the upper mold and the lower mold can rotate synchronously, which is not only beneficial to the rapid and comprehensive filling of the molten raw material in the mold cavity, ensuring the uniformity of the raw material distribution, but also can promote the smooth discharge of the air generated during the injection molding process, thereby greatly improving the overall quality and yield of the injection molded product.

[0018] 2. The lifting rod moves up and down, which can not only make the upper mold and the lower mold rotate synchronously for air exhaust, but also complete the mold closing or mold opening work, without the need for additional equipment, with simple operation and saving equipment costs. Description of the Drawings

[0019] Figure 1 is the front view three-dimensional schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 is the present utility model Figure 1 bottom view three-dimensional schematic diagram of the structure;

[0021] Figure 3 is the present utility model Figure 1 sectional schematic diagram of the structure;

[0022] Figure 4 is the three-dimensional schematic diagram of the lifting rod structure of the present utility model.

[0023] In the figure: 1. Upper mold; 11. Injection tube; 12. Lifting rod; 121. Spiral protrusion; 122. Convex ring; 13. Accommodating cavity; 131. Spiral groove; 132. Support spring; 133. Support plate; 14. Positioning sleeve; 141. Limit groove; 15. Positioning rod; 2. Lower mold; 21. Support table; 22. Connecting spring; 23. Positioning groove. Detailed implementation manners

[0024] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0025] Refer to the attached Figures 1-4 , an insert injection mold, comprising an upper mold 1 and a lower mold 2 which are arranged in cooperation with each other. An exhaust groove is formed on the lower mold 2. By controlling the synchronous rotation of the upper mold 1 and the lower mold 2, when the molten raw material quickly fills the mold cavity, the air in the molten raw material is discharged from the raw material, and then discharged from the mold cavity through the exhaust groove, so as to improve the quality of the injection molded product. A plurality of injection tubes 11 are arranged on the top of the upper mold 1 for injecting molten raw material into the mold cavity formed when the upper mold 1 and the lower mold 2 are closed, so as to improve the injection efficiency;

[0026] A receiving cavity 13 is formed at the top of the upper mold 1. A lifting rod 12 is inserted into the receiving cavity 13. A spiral protrusion 121 is arranged on the outer wall of the lifting rod 12. A spiral groove 131 matching the spiral protrusion 121 is formed in the cylindrical cavity of the receiving cavity 13. Through the up-and-down movement of the lifting rod 12, the spiral protrusion 121 thereon cooperates with the spiral groove 131 in the receiving cavity 13, so that the upper mold 1 rotates around the axis of the lifting rod 12.

[0027] During use, the upper mold 1 and the lower mold 2 are closed, and then molten raw material is injected into the mold cavity through the injection tube 11. Then, the lifting rod 12 is controlled to move downward. The top of the lifting rod 12 is connected to the output end of the lifting cylinder. The lifting cylinder drives the lifting rod 12 to move downward. At this time, the spiral protrusion 121 on the surface of the lifting rod 12 moves downward in the spiral groove 131. During this process, the lifting rod 12 can only move vertically downward. Therefore, the upper mold 1 will rotate around the axis of the lifting rod 12. Since the upper mold 1 and the lower mold 2 are in a matching state, the upper mold 1 and the lower mold 2 can rotate synchronously. The rotation process not only facilitates the rapid and comprehensive filling of the molten raw material in the mold cavity, ensuring the uniformity of the raw material distribution, but also promotes the smooth discharge of the air generated during the injection process, thereby greatly improving the overall quality and yield of the injection molded product.

[0028] In this embodiment, the upper mold 1 is a convex mold, and the lower mold 2 is a concave mold. The convex mold and the concave mold cooperate with each other. The raw material for injection molding enters the concave mold of the lower mold 2. The exhaust groove is opened on the parting surface of the lower mold 2, which is convenient for improving the efficiency and speed of exhaust.

[0029] In this embodiment, a support platform 21 is provided at the bottom of the lower mold 2. The lower mold 2 is rotatably arranged on the support platform 21, which is convenient for the lower mold 2 and the upper mold 1 to rotate synchronously. The bottom of the lower mold 2 is connected to the support platform 21 through a connecting spring 22, which is convenient for the lower mold 2 and the upper mold 1 to rotate synchronously and reset, facilitating subsequent injection molding processing.

[0030] In this embodiment, a support spring 132 is provided at the bottom inside the accommodation cavity 13. A support plate 133 is provided at the top of the support spring 132. The support plate 133 abuts against the bottom of the lifting rod 12, forming an effective support structure. In order to strengthen the connection between the upper mold 1 and the lifting rod 12, a positioning sleeve 14 extending upward is provided at the top of the upper mold 1. The positioning sleeve 14 is sleeved on the outer wall of the lifting rod 12. A convex ring 122 is provided on the outer wall of the lifting rod 12 located in the limiting groove 141 of the positioning sleeve 14. A necking structure is designed at the top of the limiting groove 141, and the diameter of its inner top is smaller than the diameter of the convex ring 122 to prevent the lifting rod 12 from moving upward and disengaging from the positioning sleeve 14.

[0031] The lifting rod 12 can drive the upper mold 1 to move up and down, thereby completing the mold closing or mold opening operation. When closing the mold, the lifting rod 12 moves downward. At this time, the lifting rod 12 drives the upper mold 1 to move downward and then form a mold closure with the lower mold 2. After injection through the injection pipe 11, the lifting rod 12 is controlled to continue moving downward. At this time, under the cooperation of the spiral protrusion 121 and the spiral groove 131, the upper mold 1 and the lower mold 2 rotate synchronously. When opening the mold, the lifting rod 12 moves upward. Under the cooperation of the spiral protrusion 121 and the spiral groove 131, the upper mold 1 and the lower mold 2 rotate synchronously in the opposite direction. Then, under the cooperation of the convex ring 122 on the surface of the lifting rod 12 and the positioning sleeve 14, the lifting rod 12 can drive the upper mold 1 to move upward, thereby completing the separation operation of the mold. There is no need for other additional equipment to perform the mold closing or mold opening operation, which is not only simple in operation but also saves equipment costs.

[0032] In this embodiment, a positioning rod 15 is provided on the upper mold 1, and a positioning groove 23 for cooperating with the positioning rod 15 is opened in the lower mold 2. When the upper mold 1 and the lower mold 2 are closed, the positioning rod 15 is inserted into the positioning groove 23 to achieve precise alignment of the upper mold 1 and the lower mold 2 and subsequent synchronous rotation, facilitating the improvement of the accuracy and stability of the injection molding process.

[0033] In this embodiment, the injection pipe 11 is a high-temperature resistant flexible pipe, which has sufficient flexibility to allow the upper mold 1 to rotate after injection molding, ensuring that the upper mold 1 and the lower mold 2 can rotate synchronously and improving the diversity and efficiency of mold operation.

[0034] It should be noted that, in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0035] 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 recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An insert injection mold, comprising an upper mold (1) and a lower mold (2) arranged in cooperation with each other, wherein the lower mold (2) is provided with an exhaust groove to exhaust the gas in the mold cavity when the mold is closed, characterized in that: The top of the upper mold (1) is provided with a plurality of injection tubes (11) for simultaneously injecting molten raw materials into a mold cavity formed when the upper mold (1) and the lower mold (2) are closed; The top of the upper mold (1) is provided with a receiving cavity (13), a lifting rod (12) is inserted into the receiving cavity (13), the outer wall of the lifting rod (12) is provided with a spiral protrusion (121), and a spiral groove (131) matching the spiral protrusion (121) is provided in the cylindrical cavity of the receiving cavity (13). When the lifting rod (12) moves up and down, the spiral protrusion (121) on it matches with the spiral groove (131) in the receiving cavity (13), so that the upper mold (1) rotates along the axis of the lifting rod (12).

2. An insert injection mold according to claim 1, characterized in that: The upper die (1) is a male die, the lower die (2) is a female die, and the exhaust groove is arranged on the parting surface of the lower die (2).

3. An insert injection mold according to claim 2, characterized in that: A support platform (21) is provided at the bottom of the lower mold (2), the lower mold (2) is rotatably arranged on the support platform (21), and the bottom of the lower mold (2) is connected to the support platform (21) via a connecting spring (22).

4. An insert injection mold according to claim 1, characterized in that: A support spring (132) is provided at the bottom of the accommodating cavity (13), a support plate (133) is provided at the top of the support spring (132), the support plate (133) is in contact with the bottom of the lifting rod (12), a positioning sleeve (14) extending upward is provided at the top of the upper mold (1), the positioning sleeve (14) is sleeved on the outer wall of the lifting rod (12), and a convex ring (122) is provided on the outer wall of the lifting rod (12) located in the limiting groove (141) of the positioning sleeve (14), the top diameter of the limiting groove (141) is smaller than the diameter of the convex ring (122), so as to prevent the lifting rod (12) from moving upward and separating from the positioning sleeve (14).

5. The insert injection mold according to claim 1, characterized in that: The upper mold (1) is provided with a positioning rod (15), and the lower mold (2) is provided with a positioning groove (23) that matches the positioning rod (15). When the upper mold (1) and the lower mold (2) are closed, the positioning rod (15) is inserted into the positioning groove (23) to achieve accurate alignment of the upper mold (1) and the lower mold (2) and subsequent synchronous rotation.

6. An insert injection mold according to claim 1, characterized in that: The injection tube (11) is a flexible tube to allow the upper mold (1) to rotate after injection molding.

Images