Plastic chair injection mold with multi-angle pitched roof structure

Abstract

The utility model relates to the technical field of plastic chair injection molds, and discloses a plastic chair injection mold with a multi-angle pitched roof structure, which comprises a fixed mold and a movable mold, a cavity is arranged in the fixed mold, an auxiliary structure is arranged in the cavity, and the movable mold is arranged in the cavity. The auxiliary structure comprises ejector rods, a transverse frame, a liquid inlet pipe, a liquid outlet pipe, an air cylinder and a fixing plate, the air cylinder is fixed to the inner wall of the cavity, an output shaft of the air cylinder is fixed to the bottom of the fixing plate, the top of the fixing plate is fixed to the bottoms of the ejector rods, and the number of the ejector rods is two. Through the arranged auxiliary structure, the liquid inlet pipe and the liquid outlet pipe are connected with the external circulating water tank, the circulating water tank pumps cooling liquid from the liquid inlet pipe through a water pump, the cooling liquid reaches the transverse frame through one set of ejector rods and then is discharged through the other set of ejector rods and the liquid outlet pipe to achieve circulation, heat of the fixed mold is taken away through the transverse frame, and auxiliary heat dissipation is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic chair injection molds, and specifically relates to a plastic chair injection mold with a multi-angle lifter structure. Background Technique

[0002] Plastic chairs are generally injection-molded once through plastic molds, and have the characteristics of fast processing speed, low cost, and recyclability. They are widely used in various scenarios such as restaurants, meeting rooms, and families.

[0003] Currently, when demolding, a lifter mechanism is needed to push out the molded injection parts for demolding. However, it does not have the function of auxiliary heat dissipation, which affects the overall processing efficiency. Therefore, we propose a plastic chair injection mold with a multi-angle lifter structure. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a plastic chair injection mold with a multi-angle lifter structure to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A plastic chair injection mold with a multi-angle lifter structure, including a fixed mold and a movable mold. A cavity is provided inside the fixed mold, and an auxiliary structure is arranged inside the cavity;

[0006] The auxiliary structure includes:

[0007] A push rod for pushing the injection part;

[0008] A cross frame for connecting two groups of push rods;

[0009] An inlet pipe, which cooperates with an outlet pipe to form a circulating water path for the two groups of push rods and the cross frame to dissipate heat from the fixed mold;

[0010] A cylinder for controlling the lifting of two groups of push rods.

[0011] Preferably, the cylinder is fixed on the inner wall of the cavity. The output shaft of the cylinder is fixed to the bottom of a fixed plate, and the top of the fixed plate is fixed to the bottom of the push rod. There are two groups of push rods, and both groups of push rods penetrate through the fixed mold and are slidably connected to the fixed mold. The two groups of push rods are connected and fixed to the cross frame. One group of push rods is connected to the inlet pipe, and the other group of push rods is connected to the outlet pipe. The inlet pipe and the outlet pipe both penetrate through the fixed mold and are fixed to the fixed mold. By connecting the inlet pipe and the outlet pipe to an external circulating water tank, the circulating water tank pumps coolant from the inlet pipe through a water pump. The coolant flows through one group of push rods to the cross frame, and then is discharged through the other group of push rods and the outlet pipe to achieve circulation. The heat of the fixed mold is carried away by the cross frame to achieve auxiliary heat dissipation.

[0012] Preferably, two sets of auxiliary structures are provided, and the two sets of auxiliary structures are symmetrically arranged. The ejector rods are controlled by two cylinders to lift back and forth to achieve multi-angle inclined ejection, so as to facilitate the demolding work of the staff.

[0013] Preferably, a driven device is arranged inside the ejector rod. The driven device includes a piston. Two sets of pistons are provided, and the two sets of pistons are respectively connected to the pistons of the two ejector rods. The liquid inlet pipe is connected to one set of pistons, and the liquid outlet pipe is connected to the other set of pistons. Through holes are formed in the centers of the two sets of pistons. A support plate is fixed inside the through hole in the center of the piston connected to the liquid inlet pipe. A connecting rod is arranged on the support plate. The connecting rod penetrates through the support plate and is slidably connected to the support plate. A rubber plug is fixed at the bottom of the connecting rod. A spring is fixed at the top of the rubber plug. One end of the spring away from the rubber plug is fixed at the bottom of the support plate. By blocking the through hole in the piston center with the rubber plug, it is realized that the liquid can only be discharged from the liquid inlet pipe and cannot flow back into the liquid inlet pipe from the ejector rod. When the cylinder controls the ejector rod to lift, since the liquid inlet pipe and the liquid outlet pipe cannot move, the liquid inlet pipe and the liquid outlet pipe pull the piston to move downward inside the ejector rod in a disguised form, and the coolant inside the ejector rod and the cross frame is pumped. The coolant abuts against the piston with the rubber plug. The rubber plug blocks the through hole under the action of the spring, so that the coolant can only be discharged from the liquid outlet pipe. When the injection molded part is ejected, the coolant inside the ejector rod and the cross frame can be pumped out, avoiding the coolant staying in the cross frame for a long time.

[0014] Compared with the prior art, the present invention provides a plastic chair injection mold with a multi-angle inclined ejection structure, which has the following beneficial effects:

[0015] 1. For the plastic chair injection mold with a multi-angle inclined ejection structure, through the provided auxiliary structure, by connecting the liquid inlet pipe and the liquid outlet pipe to an external circulating water tank, the circulating water tank pumps coolant into the liquid inlet pipe through a water pump. The coolant passes through one set of ejector rods to the cross frame, and then is discharged through the other set of ejector rods and the liquid outlet pipe to realize circulation. The heat of the fixed mold is taken away by the cross frame to achieve auxiliary heat dissipation.

[0016] 2. For the plastic chair injection mold with a multi-angle inclined ejection structure, through the provided auxiliary structure and driven device, when the cylinder controls the ejector rod to lift, since the liquid inlet pipe and the liquid outlet pipe cannot move, the liquid inlet pipe and the liquid outlet pipe pull the piston to move downward inside the ejector rod in a disguised form, and the coolant inside the ejector rod and the cross frame is pumped. The coolant abuts against the piston with the rubber plug. The rubber plug blocks the through hole under the action of the spring, so that the coolant can only be discharged from the liquid outlet pipe. When the injection molded part is ejected, the coolant inside the ejector rod and the cross frame can be pumped out, avoiding the coolant staying in the cross frame for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic front view structure diagram of the whole of the present invention;

[0018] Figure 2 This is a schematic cross-sectional view of the fixed mold of the present utility model;

[0019] Figure 3 This is a schematic view of the auxiliary structure of the present utility model;

[0020] Figure 4 This is a schematic cross-sectional view of the ejector rod and the cross frame of the present utility model;

[0021] Figure 5 This is a schematic cross-sectional view of the piston of the present utility model.

[0022] In the figure: 1, fixed mold; 2, moving mold; 3, auxiliary structure; 31, ejector rod; 32, cross frame; 33, liquid inlet pipe; 34, liquid outlet pipe; 35, cylinder; 36, fixing plate; 4, driven device; 41, piston; 42, through hole; 43, support plate; 44, connecting rod; 45, rubber plug; 46, spring; 5, cavity. Specific embodiments

[0023] As Figures 1-5 shown, the present utility model provides a technical solution: a plastic chair injection mold with a multi-angle angled lifter structure, including a fixed mold 1 and a moving mold 2. A cavity 5 is opened inside the fixed mold 1, and an auxiliary structure 3 is arranged inside the cavity 5. The auxiliary structure 3 includes: an ejector rod 31, a cross frame 32, a liquid inlet pipe 33, a liquid outlet pipe 34, a cylinder 35, and a fixing plate 36.

[0024] The cylinder 35 is fixed on the inner wall of the cavity 5. The output shaft of the cylinder 35 is fixed to the bottom of the fixing plate 36. The top of the fixing plate 36 is fixed to the bottom of the ejector rod 31. There are two groups of ejector rods 31. Both groups of ejector rods 31 penetrate the fixed mold 1 and are slidably connected to the fixed mold 1. The two groups of ejector rods 31 are communicated with and fixed to the cross frame 32. One group of ejector rods 31 is connected to the liquid inlet pipe 33, and the other group of ejector rods 31 is connected to the liquid outlet pipe 34. Both the liquid inlet pipe 33 and the liquid outlet pipe 34 penetrate the fixed mold 1 and are fixed to the fixed mold 1. By connecting the liquid inlet pipe 33 and the liquid outlet pipe 34 to an external circulating water tank, the circulating water tank pumps coolant into the liquid inlet pipe 33 through a water pump. The coolant passes through one group of ejector rods 31 to the cross frame 32, and then is discharged through the other group of ejector rods 31 and the liquid outlet pipe 34 to realize circulation. The heat of the fixed mold 1 is carried away by the cross frame 32 to realize auxiliary heat dissipation.

[0025] There are two groups of auxiliary structures 3, and the two groups of auxiliary structures 3 are symmetrically arranged. The ejector rods 31 are controlled by the two groups of cylinders 35 to lift back and forth to realize multi-angle angled lifting, so as to facilitate the demolding work of the staff.

[0026] Inside the ejector rod 31, there is a driven device 4. The driven device 4 includes a piston 41. There are two sets of pistons 41. The two sets of pistons 41 are respectively piston-connected to the two ejector rods 31. The liquid inlet pipe 33 is connected to one set of pistons 41, and the liquid outlet pipe 34 is connected to the other set of pistons 41. Through holes 42 are provided in the centers of the two sets of pistons 41. Inside the through hole 42 in the center of the piston 41 connected to the liquid inlet pipe 33, a support plate 43 is fixed. On the support plate 43, there is a connecting rod 44. The connecting rod 44 passes through the support plate 43 and is slidably connected to the support plate 43. At the bottom of the connecting rod 44, a rubber plug 45 is fixed. At the top of the rubber plug 45, a spring 46 is fixed. One end of the spring 46 away from the rubber plug 45 is fixed to the bottom of the support plate 43. By blocking the through hole 42 in the piston 41 with the rubber plug 45, it is realized that the liquid can only be discharged from the liquid inlet pipe 33 and cannot flow back from the ejector rod 31 into the liquid inlet pipe 33. When the cylinder 35 controls the ejector rod 31 to lift, since the liquid inlet pipe 33 and the liquid outlet pipe 34 cannot move, the liquid inlet pipe 33 and the liquid outlet pipe 34 pull the piston 41 to move downward in the ejector rod 31 in effect. The coolant inside the ejector rod 31 and the cross frame 32 is pumped. The coolant abuts against the piston 41 with the rubber plug 45. The rubber plug 45 blocks the through hole 42 under the action of the spring 46, so that the coolant can only be discharged from the liquid outlet pipe 34. It is realized that when the injection molded part is ejected, the coolant in the ejector rod 31 and the cross frame 32 can be pumped out, avoiding the coolant staying in the cross frame 32 for a long time.

[0027] In the present utility model, during use, after the fixed mold 1 and the movable mold 2 are clamped, an injection molding operation is carried out. After the injection molding is completed, the connectors of the liquid inlet pipe 33 and the liquid outlet pipe 34 are connected to an external circulating water tank. The coolant is pumped into the ejector rod 31 and the cross frame 32 from the liquid inlet pipe 33 and then discharged from the liquid outlet pipe 34 to realize circulation for auxiliary cooling operation.

[0028] During demolding, after separating the fixed mold 1 and the movable mold 2, the cylinder 35 is externally powered, and the two cylinders 35 are started to control the ejector rod 31 to lift back and forth to realize multi-angle inclined ejection, so as to facilitate the demolding work of the staff.

[0029] When the cylinder 35 controls the ejector rod 31 to lift, since the liquid inlet pipe 33 and the liquid outlet pipe 34 cannot move, the liquid inlet pipe 33 and the liquid outlet pipe 34 pull the piston 41 to move downward in the ejector rod 31 in effect. The coolant inside the ejector rod 31 and the cross frame 32 is pumped. The coolant abuts against the piston 41 with the rubber plug 45. The rubber plug 45 blocks the through hole 42 under the action of the spring 46, so that the coolant can only be discharged from the liquid outlet pipe 34. It is realized that when the injection molded part is ejected, the coolant in the ejector rod 31 and the cross frame 32 can be pumped out, avoiding the coolant staying in the cross frame 32 for a long time. After the demolding is completed, controlling the cylinder 35 to drive the ejector rod 31 and the cross frame 32 to reset is enough.

[0030] The above has generally described the present utility model in detail. However, based on the present utility model, some modifications or improvements can be made thereto, which are obvious to those of ordinary skill in the technical field. Therefore, modifications or improvements made without departing from the spirit and idea of the present utility model are all within the protection scope of the present utility model.

Claims

1. An injection mold for a plastic chair with a multi-angle angled lifter structure, comprising a fixed mold (1) and a movable mold (2), characterized in that: An internal cavity (5) is provided in the fixed mold (1), and an auxiliary structure (3) is arranged inside the cavity (5); The auxiliary structure (3) includes: A ejector rod (31) for pushing the injection molded part; A cross frame (32) for connecting two groups of ejector rods (31); An inlet pipe (33) which, in cooperation with an outlet pipe (34), forms a circulating water path for the two groups of ejector rods (31) and the cross frame (32) to dissipate heat from the fixed mold (1); A cylinder (35) for controlling the lifting of the two groups of ejector rods (31).

2. The plastic chair injection mold with a multi-angle inclined top structure according to claim 1, wherein: The cylinder (35) is fixed on the inner wall of the cavity (5). The output shaft of the cylinder (35) is fixed to the bottom of a fixing plate (36), and the top of the fixing plate (36) is fixed to the bottom of the ejector rod (31). There are two groups of ejector rods (31), and both groups of ejector rods (31) penetrate the fixed mold (1) and are slidably connected to the fixed mold (1).

3. The injection mold for plastic chairs with a multi-angle angled lifter structure according to claim 2, wherein: The two groups of ejector rods (31) are connected and fixed to the cross frame (32). One group of ejector rods (31) is connected to the inlet pipe (33), and the other group of ejector rods (31) is connected to the outlet pipe (34). The inlet pipe (33) and the outlet pipe (34) both penetrate the fixed mold (1) and are fixed to the fixed mold (1).

4. A plastic chair injection mold with a multi-angle angled lifter structure according to claim 1, characterized in that: There are two groups of the auxiliary structures (3), and the two groups of the auxiliary structures (3) are symmetrically arranged.

5. A plastic chair injection mold with a multi-angle inclined core-pulling structure according to claim 2, characterized in that: A driven device (4) is arranged inside the ejector rod (31). The driven device (4) includes a piston (41). There are two groups of pistons (41), and the two groups of pistons (41) are respectively piston-connected to the two groups of ejector rods (31). The inlet pipe (33) is connected to one group of pistons (41), and the outlet pipe (34) is connected to the other group of pistons (41). Through holes (42) are provided at the centers of the two groups of pistons (41).

6. The plastic chair injection mold with a multi-angle lifter structure according to claim 5, characterized in that: A support plate (43) is fixed inside the through hole (42) at the center of the piston (41) connected to the inlet pipe (33). A connecting rod (44) is arranged on the support plate (43). The connecting rod (44) penetrates the support plate (43) and is slidably connected to the support plate (43). A rubber plug (45) is fixed to the bottom of the connecting rod (44), and a spring (46) is fixed to the top of the rubber plug (45). One end of the spring (46) away from the rubber plug (45) is fixed to the bottom of the support plate (43).

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