Guide structure for injection molding part mold

Abstract

The guide structure comprises a guide column and a guide cylinder, a guide terminal is fixed to the end of the guide column, the guide cylinder jointly sleeves the surfaces of the guide terminal and the guide column, a first guide ball is movably embedded in one side of the guide terminal, and a second guide ball is movably embedded in the other side of the guide terminal; wherein the first guide balls and the second guide balls are distributed in an up-and-down staggered mode, and spiral grooves are formed in the guide terminals. Through the arrangement of the first guide ball and the second guide ball, the conventional surface contact is changed into the rolling point contact of the first guide ball and the second guide ball in the relative sliding process of the guide column and the guide cylinder, so that the contact surface in the sliding process can be reduced, the loss of kinetic energy can be conveniently reduced, and the service life of the guide column and the guide cylinder is prolonged. Meanwhile, friction can be reduced, abrasion is reduced, and the service life of the guide structure is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of injection molding molds, and more specifically, to a guide structure for injection molding molds. Background Technology

[0002] Injection molds are tools used to produce plastic products. Injection molding is a processing method used for the mass production of certain complex-shaped parts. Specifically, it refers to injecting molten plastic into the mold cavity under high pressure by an injection molding machine, and obtaining the molded product after cooling and solidification. With the rapid development of the plastics industry and the continuous improvement of the strength and other properties of general and engineering plastics, the application range of plastic products is constantly expanding, and the consumption of plastic products is also increasing.

[0003] In the practical application of injection molds, guide structures are used to ensure alignment accuracy during the opening and closing of the upper and lower molds. However, traditional guide structures mostly use guide pillars and guide cylinders. In actual applications, due to the large contact area between them, they wear out quickly and need to be replaced frequently. Therefore, we have made improvements and proposed a guide structure for injection molds. Utility Model Content

[0004] The purpose of this invention is to provide a guide structure for injection molds, which solves the problem that existing guide structures for injection molds wear out quickly during use.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] A guide structure for injection molds includes a guide post and a guide cylinder. A guide terminal is fixed to the end of the guide post. The guide cylinder is sleeved on the surface of the guide terminal and the guide post. A first guide ball is movably embedded on one side of the guide terminal, and a second guide ball is movably embedded on the other side.

[0007] The first guide ball and the second guide ball are staggered vertically, and there is a spiral groove inside the guide terminal. The spiral groove has an inflection point at the position corresponding to the first guide ball and the second guide ball. The inflection point allows the lubricating oil inside to contact the surface of the first guide ball and the second guide ball.

[0008] As a preferred technical solution of this application, a lubrication groove is provided inside the guide terminal near the first guide ball and the second guide ball, and a lubricating sponge is provided in the lubrication groove;

[0009] One end of the lubricating sponge is pressed against the surface of the corresponding first guide ball and second guide ball.

[0010] As a preferred technical solution of this application, the inflection point is connected to the corresponding lubrication groove through a connecting groove.

[0011] As a preferred technical solution of this application, the top of the guide terminal has a pressure boosting element for outputting lubricating oil within the spiral groove;

[0012] The boosting element includes a boosting chamber located on one side of the top of the guide terminal and an oil storage chamber located on the other side of the top of the guide terminal. The boosting chamber and the oil storage chamber are connected by a connecting channel.

[0013] As a preferred technical solution of this application, a trigger rod is threaded through the top of one side of the guide cylinder, and rotating the trigger rod can move one end of it toward the inside of the guide cylinder.

[0014] As a preferred technical solution of this application, the two ends of the spiral groove have an input groove and an output groove respectively, and the input groove is connected to the corresponding pressure chamber above;

[0015] The output slot is connected to the oil return slot in the guide terminal.

[0016] As a preferred technical solution of this application, the input groove has a first one-way valve, which allows the lubricating fluid in the pressurization chamber to be input into the input groove in only one direction.

[0017] As a preferred technical solution of this application, the top of the oil storage chamber is provided with a second one-way valve, which allows external air to be input into the oil storage chamber in one direction.

[0018] As a preferred technical solution of this application, a piston is slidably provided in the pressurization chamber, and the top end of the piston passes through the outside of the guide terminal and is fixed with a trigger platform.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] In the scheme of this application:

[0021] 1. By setting the first guide ball and the second guide ball, the conventional surface contact during the relative sliding process of the guide column and the guide cylinder is changed to point contact through the rolling of the first guide ball and the second guide ball. This can reduce the contact area during the sliding process, which can reduce the loss of kinetic energy, reduce friction and wear, and extend the service life of the guide structure.

[0022] 2. By using the pressurizing element and trigger rod, one end of the trigger rod can be inserted into the guide cylinder. During the sliding guidance process of the guide terminal, the trigger table will contact the surface of the trigger rod. The trigger table, subjected to the resistance force, will cause the piston to move in the pressurizing chamber, thereby pressurizing the chamber. This causes some of the lubricating oil to fall through the spiral groove. During the fall, it will contact the corresponding lubricating sponge at multiple inflection points. The lubricating sponge, after absorbing the oil, can achieve dynamic lubrication during the rolling of the first and second guide balls, which helps to further reduce contact friction and achieve better maintenance. Attached Figure Description

[0023] Figure 1 A schematic diagram of the guide structure for injection molds provided in this application;

[0024] Figure 2 A schematic diagram of the separation structure of the guide structure for injection molds provided in this application;

[0025] Figure 3 A cross-sectional structural schematic diagram of the guide structure for injection molds provided in this application;

[0026] Figure 4 A partial cross-sectional view of the guide structure for injection molds provided in this application;

[0027] Figure 5 The guide structure for injection molds provided in this application Figure 4 Enlarged structural diagram at point A in the middle;

[0028] Figure 6 A schematic diagram of the internal structure of the guide structure for the injection mold provided in this application, showing the trigger rod inserted into the guide cylinder;

[0029] Figure 7 A schematic diagram of the contact structure between the trigger rod and the trigger table of the guide structure for the injection mold provided in this application.

[0030] The image shows:

[0031] 1. Guide column; 2. Guide cylinder; 3. Guide terminal; 4. Pressure boosting element; 5. Trigger rod;

[0032] 31. First guide ball; 32. Second guide ball; 33. Spiral groove; 34. Inflection point; 35. Lubrication groove; 36. Lubricating sponge; 37. Connecting groove; 38.

[0033] 330. Input channel; 331. Output channel; 332. Return oil channel; 333. First check valve;

[0034] 41. Pressure chamber; 42. Oil reservoir; 43. Connecting channel; 44. Second check valve; 45. Piston; 46. Trigger platform; 47. Spring. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0036] like Figures 1-7 As shown, a guide structure for injection molds includes a guide post 1 and a guide cylinder 2. A guide terminal 3 is fixed to the end of the guide post 1. The guide cylinder 2 is sleeved on the surface of the guide terminal 3 and the guide post 1. A first guide ball 31 is movably embedded on one side of the guide terminal 3, and a second guide ball 32 is movably embedded on the other side.

[0037] In this embodiment, the first guide ball 31 and the second guide ball 32 are staggered vertically. There are multiple first guide balls 31 and multiple second guide balls 32. The multiple first guide balls 31 are distributed in an orderly manner along the vertical direction. Similarly, the multiple second guide balls 32 are also distributed at equal intervals along their corresponding vertical directions. The multiple first guide balls 31 and multiple second guide balls 32 are staggered sequentially, so that there is a height difference between each of the individual first guide balls 31 and second guide balls 32.

[0038] The guide terminal 3 has a spiral groove 33 inside. The spiral groove 33 has an inflection point 34 at the position corresponding to the first guide ball 31 and the second guide ball 32. The inflection point 34 allows the lubricating oil inside to contact the surface of the first guide ball 31 and the second guide ball 32. The first guide ball 31 and the second guide ball 32 can rotate on the surface of the guide terminal 3 without falling off.

[0039] A lubrication groove 35 is provided inside the guide terminal 3 near the first guide ball 31 and the second guide ball 32. A lubricating sponge 36 is provided in the lubrication groove 35, wherein one end of the lubricating sponge 36 abuts against the surface of the corresponding first guide ball 31 and the second guide ball 32.

[0040] The inflection point 34 is connected to the corresponding lubrication groove 35 through the connecting groove 37. The lubricating sponge 36 can guide and absorb the lubricating oil output from the spiral groove 33 and act on the surface of the corresponding first guide ball 31 and second guide ball 32, thereby forming a lubricating effect on them.

[0041] The top of the guide terminal 3 has a pressure boosting element 4 for outputting lubricating oil within the spiral groove 33. The pressure boosting element 4 includes a pressure boosting chamber 41 located on one side of the top of the guide terminal 3 and an oil storage chamber 42 located on the other side of the top of the guide terminal 3. The pressure boosting chamber 41 and the oil storage chamber 42 are connected via a connecting channel 43. A trigger rod 5 is threaded through the top of one side of the guide cylinder 2. Rotating the trigger rod 5 moves one end towards the inside of the guide cylinder 2. In its natural state (without lubrication), the trigger rod 5 will not extend into the interior of the guide cylinder 2.

[0042] The spiral groove 33 has an input groove 330 and an output groove 331 at its two ends. The input groove 330 is connected to the corresponding pressure chamber 41 above. The output groove 331 is connected to the oil return groove 332 in the guide terminal 3. The oil return groove 332 can recover the remaining lubricating oil after the spiral groove 33 outputs. Specifically, a through hole can be designed at the bottom of the guide terminal 3 to connect with the oil return groove 332 above. In the application state, the through hole is blocked by a rubber head. When recovering, the rubber head in the through hole is removed to realize the discharge and unified collection of the lubricating oil inside.

[0043] The input slot 330 has a first one-way valve 333, which allows the lubricating fluid in the booster chamber 41 to be input into the input slot 330 in only one direction. The top of the oil storage chamber 42 has a second one-way valve 44, which allows external air to be input into the oil storage chamber 42 in one direction. At the same time, through the action of the second one-way valve 44, lubricating oil can be added to the inside of the oil storage chamber 42 periodically by an external oiling device. A piston 45 is slidably installed in the booster chamber 41. The top of the piston 45 passes through the outside of the guide terminal 3 and is fixed with a trigger table 46. A spring 47 fixed to the surface of the guide terminal 3 is sleeved on the surface of the trigger table 46.

[0044] Specifically, when the mold inside the injection mold opens and closes, the guide post 1 and the guide cylinder 2 can slide relative to each other, so that the first guide ball 31 and the second guide ball 32 on the surface of the guide terminal 3 on the guide post 1 roll close to the inner side of the guide cylinder 2. The contact surface between the ball and the guide cylinder 2 is a point contact. In this way, while achieving guidance, the contact area during the guidance process is reduced, thus reducing wear. This is conducive to the better application of this guiding structure in the injection mold.

[0045] Furthermore, during the aforementioned guiding process, the triggering table 46 will not contact the top wall of the guide cylinder 2, so the triggering table 46 will not be triggered to cause the lubricant to be squeezed out. Also, when the overall length of the guide column 1 and the guide cylinder 2 is in its shortest state during the sliding process, there is still a gap between the top of the guide terminal 3 and the top wall of the guide cylinder 2, and the height of this gap is less than the distance between the trigger rod 5 and the top wall of the guide cylinder 2.

[0046] When lubrication and maintenance are required for the first guide ball 31 and the second guide ball 32, the trigger rod 5 is rotated so that one end is inserted into the corresponding guide cylinder 2. During the guiding sliding process between the guide post 1 and the guide cylinder 2, when the movement reaches its shortest state, the trigger platform 46 at the top of the guide terminal 3 will gradually contact the corresponding trigger rod 5. In further movement, the trigger platform 46 will form an abutment with the trigger rod 5. Figure 7 In the state shown, the triggering platform 46, subjected to the resisting force, will drive the piston 45 to slide within the pressurizing chamber 41, allowing the lubricating oil inside to enter the threaded groove 33. During the process of lubricating oil entering within the spiral groove 33, it will seep into the corresponding lubrication groove 35 through multiple inflection points 34, and through the lubricating sponge 36, it will act on the surfaces of the corresponding first guide ball 31 and second guide ball 32 to form a lubricating effect. When the guide column 1 and guide cylinder 2 move away, the reset action of the spring 47 will cause the triggering platform 46 to drive the piston 45 to slide back to its original position. During the reset process, the lubricating oil in the oil storage chamber 42 can be drawn into the corresponding pressurizing chamber 41 through the connecting channel 43 to replenish the lubricating oil. Excess lubricating oil can be collected uniformly through the return oil groove 332.

Claims

1. A guide structure for injection molds, characterized in that, It includes a guide post (1) and a guide cylinder (2). The end of the guide post (1) is fixed with a guide terminal (3). The guide cylinder (2) is sleeved on the surface of the guide terminal (3) and the guide post (1). A first guide ball (31) is movably embedded on one side of the guide terminal (3), and a second guide ball (32) is movably embedded on the other side. The first guide ball (31) and the second guide ball (32) are staggered and have a spiral groove (33) inside the guide terminal (3). The spiral groove (33) has an inflection point (34) at the position corresponding to the first guide ball (31) and the second guide ball (32). The inflection point (34) allows the lubricating oil inside to contact the surface of the first guide ball (31) and the second guide ball (32).

2. The guide structure for injection molds according to claim 1, characterized in that, A lubrication groove (35) is provided inside the guide terminal (3) near the first guide ball (31) and the second guide ball (32), and a lubricating sponge (36) is provided inside the lubrication groove (35). One end of the lubricating sponge (36) abuts against the surface of the corresponding first guide ball (31) and second guide ball (32).

3. The guide structure for injection molds according to claim 2, characterized in that, The inflection point (34) is connected to the corresponding lubrication groove (35) through the connecting groove (37).

4. The guide structure for injection molds according to claim 1, characterized in that, The top of the guide terminal (3) has a pressure boosting element (4) for outputting lubricating oil within the spiral groove (33); The boosting element (4) includes a boosting chamber (41) opened on one side of the top of the guide terminal (3) and an oil storage chamber (42) opened on the other side of the top of the guide terminal (3). The boosting chamber (41) and the oil storage chamber (42) are connected by a connecting channel (43).

5. The guide structure for injection molds according to claim 1, characterized in that, A trigger rod (5) is threaded through the top of one side of the guide cylinder (2). Rotating the trigger rod (5) can move one end of it toward the inside of the guide cylinder (2).

6. A guide structure for injection molds according to claim 4, characterized in that, The spiral groove (33) has an input groove (330) and an output groove (331) at its two ends, respectively. The input groove (330) is connected to the corresponding pressure chamber (41) above. The output slot (331) is connected to the return oil slot (332) in the guide terminal (3).

7. A guide structure for injection molds according to claim 6, characterized in that, The input slot (330) has a first one-way valve (333). The first one-way valve (333) allows the lubricating fluid in the pressurization chamber (41) to be input into the input slot (330) in only one direction.

8. A guide structure for injection molds according to claim 7, characterized in that, The top of the oil storage chamber (42) has a second one-way valve (44), which allows external air to be input into the oil storage chamber (42) in one direction.

9. A guide structure for injection molds according to claim 7, characterized in that, A piston (45) is slidably disposed in the pressurization chamber (41). The top end of the piston (45) passes through the outside of the guide terminal (3) and is fixed with a trigger platform (46). A spring (47) fixed to the surface of the trigger platform (46) is sleeved on the surface of the guide terminal (3).

Images