An insert injection molding anti-overflow mold structure

Abstract

This utility model relates to the field of insert injection molding anti-overflow mold technology, and more particularly to an insert injection molding anti-overflow mold structure. It includes an operating frame, an upper mold base, and a lower mold base. The upper and lower mold bases are internally equipped with a protective mechanism, which includes several molding inserts, spring pins, and positioning rods. The molding inserts are fixedly connected to the inner wall of the upper mold base. Each molding insert has an insert hole at one of its four corners. The bottom end of the inner wall of each insert hole is fixedly connected to the bottom end of the positioning rod. A collar is fixedly connected to the upper end of the positioning rod. An insert base is fixedly connected to the inner wall of the lower mold base. The cross-sectional dimensions of the insert base are adapted to the cross-sectional dimensions of the molding insert. A spring is slidably connected to the inner wall of the collar. The insert injection molding anti-overflow mold structure provided by this utility model has the advantage of conveniently protecting automotive injection molded inserts from overflow.

Description

Technical Field

[0001] This utility model relates to the field of insert injection molding anti-overflow mold technology, and in particular to an insert injection molding anti-overflow mold structure. Background Technology

[0002] In insert molding technology, especially in the manufacturing of electronic device components such as mobile phones, the injection molding technology of metal inserts is often used. It usually involves placing the metal insert in a mold beforehand and then injecting plastic into the mold using an injection molding machine to form a whole with the metal insert.

[0003] Existing document CN217802996U discloses an injection mold with inserts and anti-overflow function. The upper mold is correspondingly positioned above the lower mold, and the insert base is fitted into the lower mold. It also includes a spring pin base, which is disposed within the insert base, and the upper end of the spring pin base has a spring pin slot. A fixing sleeve is nested and connected to the bottom of the spring pin slot. This injection mold with inserts and anti-overflow function, by adding a spring pin mechanism within the mold and utilizing the spring above the spring pin to add an elastic telescopic structure, compensates for height errors caused by insert machining. It also effectively ensures that there is no overflow of glue due to the insert nut during injection molding, and significantly improves the production and processing quality of new energy battery packs. Furthermore, it helps maintain the normal conductivity of the metal nuts inside the battery pack, enabling the new energy battery pack to operate normally.

[0004] In the existing technology, during the processing of injection molds, due to the height error between the pre-embedded nut and the inserter, it is easy for plastic to overflow when the plastic is injected into the mold. At this time, the overflowing burrs need to be removed manually, which increases the process, reduces efficiency, and the overflowing waste also causes waste. Moreover, the overflowing waste may enter important parts of the mold, thereby causing mold damage. Utility Model Content

[0005] The purpose of this invention is to solve the problem in the prior art where, during the processing of injection molds, the height error between the pre-embedded nut and the inserter causes plastic overflow when the plastic is injected into the mold. In this case, the overflowing burrs need to be removed manually, which increases the process, reduces efficiency, and the overflowing waste also causes waste. Furthermore, the overflowing waste may enter important parts of the mold, thereby causing damage to the mold.

[0006] To solve the above-mentioned technical problems, this utility model provides an insert injection molding anti-overflow mold structure, including: an operating frame, an upper mold base, and a lower mold base. The upper mold base and the lower mold base are provided with a protective mechanism. The protective mechanism includes a plurality of molding inserts, a spring pin rod, and a positioning rod. The plurality of molding inserts are fixedly connected to the inner wall of the upper mold base. The inner walls of the four corners of the molding inserts are provided with inlay holes. The bottom end of the inner wall of the inlay hole is fixedly connected to the bottom end of the positioning rod. The upper end of the positioning rod is fixedly connected to a collar. The inner wall of the lower mold base is fixedly connected to an insert base. The cross-sectional dimensions of the insert base are adapted to the cross-sectional dimensions of the molding inserts.

[0007] The effect achieved by the above-mentioned components is as follows: During the injection molding of automotive parts, the injection speed may be too fast, causing the molten plastic to fail to fill the mold smoothly, resulting in overflow. At this time, the protective mechanism set between the upper mold base and the lower mold base can effectively protect against overflow during the injection molding of the insert. It also helps to prevent positional displacement during the injection or molding process, and helps to improve the accuracy and consistency of the molded products.

[0008] Preferably, a spring is slidably connected to the inner wall of the collar, and the two ends of the spring are fixedly connected to the spring pin rod and the positioning rod, respectively.

[0009] The effect achieved by the above components is that the elasticity of the springs can effectively absorb external vibrations and impacts, preventing the spring pin rod and positioning rod from being damaged by excessive impacts, and extending the service life of the equipment.

[0010] Preferably, a plurality of insert protrusions are fixedly connected to the four sides of the molded insert, and a positioning groove is provided on the inner wall surface of the lower mold base corresponding to the position of the insert protrusion, wherein the inner wall size of the positioning groove is adapted to the cross-sectional size of the insert protrusion.

[0011] The effect achieved by the above components is that the cooperation between the insert protrusion and the positioning groove enables the mold to firmly fix the molding insert, preventing loosening or deformation during the molding process, and ensuring product quality and production process stability.

[0012] Preferably, the insert base and the lower mold base form an integrated structure, and the four peripheral corners of the insert base are inserted into the spring pin rod.

[0013] The effect achieved by the above components is that the integrated structural design eliminates the need for complex connections or assembly methods between the insert base and the lower mold base, reducing possible errors during production and assembly, thereby saving time and costs.

[0014] Preferably, auxiliary mechanisms are provided on both sides of the bottom end of the operating frame. The auxiliary mechanisms include mounting frames. One side of the bottom end of the mounting frame is fixedly connected to the bottom side wall of the operating frame. A mounting frame is fixedly connected to the surface of the mounting frame near the lower mold base. Several adjusting rods slide through the surface of the mounting frame. The ends of the several adjusting rods away from the lower mold base are fixedly connected to the same moving frame. A top block is fixedly connected to the end of the adjusting rod near the lower mold base. A retaining ring is fixedly connected to the arc surface of the adjusting rod. One side of the retaining ring abuts against the upper surface of the mounting frame. A tension spring is sleeved on the arc surface of the adjusting rod. The two ends of the tension spring are fixedly connected to the surfaces of the mounting frame and the retaining ring, respectively.

[0015] The effect achieved by the above components is as follows: when injection molding automotive parts using the upper and lower mold bases set inside the operating frame, the injection molded parts may stick to the lower mold base. At this time, the auxiliary mechanisms set on the side walls at both ends of the operating frame can be used to effectively and quickly knock off the molded injection inserts.

[0016] Preferably, a plurality of protrusions are fixedly connected to the inner wall surface of the movable frame, and the protrusions are silicone blocks.

[0017] The effect achieved by the above components is that when the moving frame is stretched, the silicone bumps can be used to assist in anti-slip operation.

[0018] Preferably, the top block is spherical and is a cemented carbide block.

[0019] The effect achieved by the above-mentioned components is that when the insert after injection molding is struck with the top block, the operation can be carried out with the help of the spherical top block made of hard alloy, so as to avoid deformation caused by long-term striking.

[0020] Compared with related technologies, the insert injection molding anti-overflow mold structure provided by this utility model has the following beneficial effects:

[0021] This utility model provides an insert injection molding anti-overflow mold structure. By operating the protective mechanism, the elastic cooperation between the spring pin rod and the spring component is achieved. Dynamic pressure is applied to the insert during mold closing, effectively blocking the flow path of the injection plastic and significantly reducing and avoiding overflow. It is especially suitable for the high-quality injection molding requirements of automotive precision inserts. At the same time, the complementary design of the insert protrusion and the positioning groove realizes three-dimensional positioning, ensuring the precision matching between the insert and the mold cavity, and meeting the assembly tolerance requirements of automotive parts.

[0022] By operating the auxiliary mechanism, the position of the adjusting rod can be slidably controlled, allowing the top block fixed at one end of the adjusting rod to strike the side wall of the lower mold base. This helps to further demold the upper and lower mold bases and prevents the lower mold base from sticking to the injection-molded insert. Attached Figure Description

[0023] Figure 1 A schematic diagram of an insert injection molding anti-overflow mold structure provided by this utility model;

[0024] Figure 2 for Figure 1 A partial structural diagram of the three-dimensional structure shown;

[0025] Figure 3 for Figure 1 The diagram shows the structure of the protective mechanism.

[0026] Figure 4 for Figure 3 A partial structural schematic diagram of the protective mechanism shown;

[0027] Figure 5 for Figure 1 The diagram shows the structure of the auxiliary mechanism.

[0028] The following are the labeling elements in the diagram: 1. Operating frame; 2. Upper mold base; 3. Lower mold base; 4. Protective mechanism; 41. Molding insert; 42. Insert protrusion; 43. Spring pin rod; 44. Spring component; 45. Collar; 46. Positioning rod; 47. Insertion hole; 48. Insert base; 49. Positioning groove; 5. Auxiliary mechanism; 51. Mounting bracket; 52. Mounting frame; 53. Adjusting rod; 54. Moving frame; 55. Protrusion; 56. Retaining ring; 57. Top block; 58. Tension spring. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0030] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0031] Please see Figures 1 to 5 The present invention provides an insert injection molding anti-overflow mold structure, comprising: an operating frame 1, an upper mold base 2 and a lower mold base 3, wherein the upper mold base 2 and the lower mold base 3 are provided with protective mechanisms 4, and auxiliary mechanisms 5 are provided on both sides of the bottom end of the operating frame 1.

[0032] In the embodiments of this utility model, please refer to Figure 2 , Figure 3 and Figure 4The protective mechanism 4 includes several molded inserts 41, spring pin rods 43, and positioning rods 46. The molded inserts 41 are fixedly connected to the inner wall of the upper mold base 2. Each of the four corners of the molded insert 41 has an insert hole 47. The bottom end of the inner wall of the insert hole 47 is fixedly connected to the bottom end of the positioning rod 46. A collar 45 is fixedly connected to the upper end of the positioning rod 46. An insert base 48 is fixedly connected to the inner wall of the lower mold base 3. The cross-sectional dimensions of the insert base 48 are adapted to the cross-sectional dimensions of the molded inserts 41. The collar 45... A spring 44 is slidably connected to the inner wall of the mold base 5. The two ends of the spring 44 are fixedly connected to the spring pin rod 43 and the positioning rod 46 respectively. Several insert protrusions 42 are fixedly connected to the four sides of the molding insert 41. The inner wall surface of the lower mold base 3 is provided with a positioning groove 49 corresponding to the position of the insert protrusion 42. The inner wall size of the positioning groove 49 is adapted to the cross-sectional size of the insert protrusion 42. The insert base 48 and the lower mold base 3 form an integrated structure, and the four peripheral corners of the insert base 48 are inserted into the spring pin rod 43.

[0033] In the embodiments of this utility model, please refer to Figure 5 The auxiliary mechanism 5 includes a mounting frame 51. One side of the bottom end of the mounting frame 51 is fixedly connected to the bottom side wall of the operating frame 1. A mounting frame 52 is fixedly connected to the side surface of the mounting frame 51 near the lower mold base 3. Several adjusting rods 53 slide through the surface of the mounting frame 51. The ends of the several adjusting rods 53 away from the lower mold base 3 are fixedly connected to the same moving frame 54. A top block 57 is fixedly connected to the end of the adjusting rod 53 near the lower mold base 3. A retaining ring 56 is fixedly connected to the arc surface of the adjusting rod 53. One side of the retaining ring 56 abuts against the upper surface of the mounting frame 51. A tension spring 58 is sleeved on the arc surface of the adjusting rod 53. The two ends of the tension spring 58 are fixedly connected to the surfaces of the mounting frame 52 and the retaining ring 56, respectively. Several protrusions 55 are fixedly connected to the inner wall surface of the moving frame 54. The protrusions 55 are silicone blocks. The top block 57 is spherical and is a hard alloy block.

[0034] The working principle of the insert injection molding anti-overflow mold structure provided by this utility model is as follows: When the upper mold base 2 and the lower mold base 3 are closed, the spring pin rod 43 at the bottom of the molding insert 41 forms a dynamic contact seal with the corner of the insert base 48 under the pre-tightening force of the spring member 44. At the same time, the elastic deformation of the spring member 44 compensates for the thermal expansion of the mold and the tolerance of the insert in real time, ensuring the complete closure of the melt flow path during the injection process. The collar 45 and the positioning rod 46 constitute a sliding guide system, which limits the lateral displacement of the spring pin rod 43 and ensures uniform force on the sealing contact surface. High-pressure melt... During injection, the spring pin rod 43 further compresses the spring member 44 under injection pressure to form a double seal. The end face of the spring pin rod 43 contacts the plane of the insert base 48 to form the first layer of seal. The interference fit between the insert protrusion 42 on the side wall of the molding insert 41 and the positioning groove 49 prevents lateral overflow of glue and forms the second layer of seal. When the mold is closed, the insert protrusion 42 is embedded in the positioning groove 49 of the lower mold base 3. The precise alignment of the insert and the mold cavity is achieved through three-dimensional constraints. The slope design of the inner wall of the positioning groove 49 is usually between 1° and 3° to assist the insertion of the insert and avoid damage from hard collisions.

[0035] To facilitate better demolding of the injection-molded insert, the auxiliary mechanism 5 can be used. First, pull the movable frame 54 on one side of the mounting bracket 51, so that the movable frame 54 drives the adjusting rod 53 on the surface of the mounting bracket 51 to slide. This allows the top block 57, which is fixed at one end of the adjusting rod 53, to strike the bottom side wall of the lower mold base 3. At the same time, the tension force generated by the adjusting rod 53 and the tension spring 58 in the mounting frame 52 is used to reset the position. This helps to quickly and easily adjust the position of the entire top block 57, so that the insert can be demolded quickly and avoid sticking.

Claims

1. A structure for an insert injection molding anti-overflow mold, characterized in that, include: The operating frame (1), upper mold base (2) and lower mold base (3) are provided with a protective mechanism (4) inside the upper mold base (2) and the lower mold base (3). The protective mechanism (4) includes several molding inserts (41), spring pin rods (43) and positioning rods (46). Several molding inserts (41) are fixedly connected to the inner wall of the upper mold base (2). The inner walls of the four corners of the molding inserts (41) are provided with inlay holes (47). The bottom of the inner wall of the inlay hole (47) is fixedly connected to the bottom of the positioning rod (46). The upper end of the positioning rod (46) is fixedly connected to a collar (45). The inner wall of the lower mold base (3) is fixedly connected to an insert base (48). The cross-sectional dimensions of the insert base (48) are adapted to the cross-sectional dimensions of the molding inserts (41).

2. The insert injection molding anti-overflow mold structure according to claim 1, characterized in that, The inner wall of the collar (45) is slidably connected to a spring (44), and the two ends of the spring (44) are fixedly connected to the spring rod (43) and the positioning rod (46) respectively.

3. The insert injection molding anti-overflow mold structure according to claim 1, characterized in that, The molded insert (41) has several insert protrusions (42) fixedly connected to its four sides. The inner wall surface of the lower mold base (3) is provided with a positioning groove (49) corresponding to the position of the insert protrusion (42). The inner wall size of the positioning groove (49) is adapted to the cross-sectional size of the insert protrusion (42).

4. The insert injection molding anti-overflow mold structure according to claim 1, characterized in that, The insert base (48) and the lower mold base (3) form an integrated structure, and the four peripheral corners of the insert base (48) are connected to the spring pin rod (43).

5. The insert injection molding anti-overflow mold structure according to claim 1, characterized in that, Auxiliary mechanisms (5) are provided on both sides of the bottom end of the operating frame (1). The auxiliary mechanism (5) includes a mounting frame (51). One side of the bottom end of the mounting frame (51) is fixedly connected to the bottom side wall of the operating frame (1). A mounting frame (52) is fixedly connected to the side surface of the mounting frame (51) near the lower mold base (3). Several adjusting rods (53) slide through the surface of the mounting frame (51). The ends of the several adjusting rods (53) away from the lower mold base (3) are fixedly connected to the same moving frame (54). A top block (57) is fixedly connected to the end of the adjusting rod (53) near the lower mold base (3). A retaining ring (56) is fixedly connected to the arc surface of the adjusting rod (53). One side of the retaining ring (56) abuts against the upper surface of the mounting frame (51). A tension spring (58) is sleeved on the arc surface of the adjusting rod (53). The two ends of the tension spring (58) are fixedly connected to the surfaces of the mounting frame (52) and the retaining ring (56), respectively.

6. The insert injection molding anti-overflow mold structure according to claim 5, characterized in that, The inner wall surface of the movable frame (54) is fixedly connected with several protrusions (55), and the protrusions (55) are silicone blocks.

7. The insert injection molding anti-overflow mold structure according to claim 5, characterized in that, The top block (57) is spherical and is a hard alloy block.

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