A preform injection mold for PET bottle preform production

Abstract

The utility model discloses a kind of injection blank mould for PET bottle embryo production, including fixed base and rotating assembly, the fixed base outer wall top is fixedly connected with rotating assembly, the rotating assembly includes connecting rod, the connecting rod outer wall is equipped with mould core, the mould core outer wall is equipped with rotating sleeve, the mould core outer wall is equipped with telescopic groove, the mould core inner wall is fixedly connected with limit block, the rotating sleeve inner wall is fixedly connected with limit ring, the mould core outer wall and rotating sleeve corresponding place are equipped with thread groove, the mould core is connected with rotating sleeve screw, the connecting rod is connected with mould core slidingly.The injection blank mould for PET bottle embryo production is set through rotating assembly, when staff needs to produce different size bottle embryo, staff can manually rotate rotating sleeve, thereby remove the connection of mould core and connecting rod, the whole process is convenient to operate, convenient for staff to disassemble maintenance work to mould core, so that production can be carried out smoothly.

Description

Technical Field

[0001] This utility model relates to the technical field of plastic molding and processing equipment, specifically to a preform mold for PET bottle preform production. Background Technology

[0002] PET material has become one of the most widely used packaging materials in the world due to its advantages such as high transparency, good chemical resistance and easy recycling. During the production process of injection molding, the PET raw material is molten and squeezed into the molding cavity by the injection molding machine. At this time, the air in the molding cavity will be squeezed out of the molding cavity through the venting structure in the mold.

[0003] According to CN214239507U, a demolding mechanism for a preform mold includes a mounting plate. Guide rods are fixedly installed on the top of one side and the bottom of the other side of the mounting plate. The beneficial effects of this utility model are: by driving the lead screw to rotate in the forward direction through a set forward and reverse motor, and cooperating with the lead screw nut and the limiting rod, the two moving blocks can move in opposite directions at the same time. With the cooperation of the fixed rod, the swing rod and the hinge, it is easy to drive the moving frame to move in the horizontal direction, and thus easy to drive the demolding rod to move in the horizontal direction. With the cooperation of the set spring, it is easy to stably demold the mold body sleeved on the surface of the mold core, which greatly improves the stability of the demolding process and reduces the cost.

[0004] While the aforementioned device can improve the stability of demolding, in actual use, workers need to regularly maintain and clean the mold to ensure the production quality of the preform. However, it is difficult for ordinary mold workers to disassemble and maintain the mold core. Utility Model Content

[0005] The purpose of this utility model is to provide a preform injection mold for PET preform production, in order to solve the problem mentioned in the background art that workers need to regularly maintain and clean the mold in actual use to ensure the production quality of the preform, while it is difficult for general mold workers to disassemble and maintain the mold core.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a preform injection mold for PET preform production, comprising a fixed base and a rotating assembly. The rotating assembly is fixedly connected to the top of the outer wall of the fixed base. The rotating assembly includes a connecting rod, a mold core is sleeved on the outer wall of the connecting rod, a rotating sleeve is sleeved on the outer wall of the mold core, a telescopic groove is formed on the outer wall of the mold core, a limit block is fixedly connected to the inner wall of the mold core, a limit ring is fixedly connected to the inner wall of the rotating sleeve, a threaded groove is formed on the outer wall of the mold core corresponding to the rotating sleeve, the mold core and the rotating sleeve are threadedly connected, and the connecting rod and the mold core are slidably connected.

[0007] Preferably, a mold sleeve is provided above the mold core, and a motor is provided on the left side of the outer wall of the connecting rod.

[0008] Preferably, the motor is fixedly connected to the fixed base, and the output end of the motor is provided with a lead screw.

[0009] Preferably, a limiting rod is provided on the right side of the outer wall of the connecting rod, and the limiting rod is fixedly connected to the fixing seat.

[0010] Preferably, a positioning plate is sleeved on the outer wall of the limiting rod, and a movable plate is provided above the positioning plate.

[0011] Preferably, the inner wall of the movable plate is provided with a spring, and a stripping block is provided on the side of the spring away from the inner wall of the movable plate.

[0012] Preferably, a moving groove is provided on the inner wall of the moving plate at the location corresponding to the stripping block, and the stripping block is elastically connected to the moving plate.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. By setting up a rotating component, when workers need to produce preforms of different sizes, they can manually rotate the rotating sleeve to disconnect the mold core from the connecting rod. The whole process is convenient and easy for workers to disassemble and maintain the mold core, so that production can proceed smoothly.

[0015] 2. By setting a lead screw, motor and limit rod, after the mold performs the preform injection stage, the operator can drive the motor to remove the preform by the stripping block. The spring and stripping block ensure that the stripping block is always in close contact with the outer wall of the mold core. Attached Figure Description

[0016] Figure 1 This is a first-view perspective three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a second-view perspective three-dimensional structural diagram of the present invention;

[0018] Figure 3 This is an exploded structural diagram of the mold core and positioning plate in this utility model;

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the movable plate in this utility model;

[0020] Figure 5 This is a schematic diagram of the cross-sectional structure of the rotating sleeve in this utility model.

[0021] In the diagram: 1. Fixed base; 201. Connecting rod; 202. Mold core; 203. Rotating sleeve; 204. Telescopic groove; 205. Limiting block; 206. Limiting ring; 207. Threaded groove; 3. Mold sleeve; 4. Lead screw; 5. Motor; 6. Limiting rod; 7. Positioning plate; 8. Stripping block; 9. Spring; 10. Moving plate; 11. Moving groove. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1 , Figure 2 , Figure 3 and Figure 5 This utility model provides a technical solution: a preform injection mold for PET preform production, including a fixed base 1 and a rotating assembly. The rotating assembly is fixedly connected to the top of the outer wall of the fixed base 1. The rotating assembly includes a connecting rod 201, a mold core 202 sleeved on the outer wall of the connecting rod 201, a rotating sleeve 203 sleeved on the outer wall of the mold core 202, a telescopic groove 204 on the outer wall of the mold core 202, a limiting block 205 fixedly connected to the inner wall of the mold core 202, a limiting ring 206 fixedly connected to the inner wall of the rotating sleeve 203, a threaded groove 207 corresponding to the outer wall of the mold core 202 and the rotating sleeve 203, the mold core 202 and the rotating sleeve 203 being threadedly connected, and the connecting rod 201 and the mold core 202 being slidably connected. By setting the rotating assembly, when the operator needs to produce preforms of different sizes, the operator can manually rotate the rotating sleeve 203 to disconnect the mold core 202 from the connecting rod 201. The whole process is convenient to operate, making it easy for the operator to disassemble and maintain the mold core 202, so that production can proceed smoothly.

[0024] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4A mold sleeve 3 is provided above the mold core 202. A motor 5 is provided on the left side of the outer wall of the connecting rod 201. The motor 5 is fixedly connected to the fixed seat 1. A lead screw 4 is provided at the output end of the motor 5. A limiting rod 6 is provided on the right side of the outer wall of the connecting rod 201. The limiting rod 6 is fixedly connected to the fixed seat 1. A positioning plate 7 is sleeved on the outer wall of the limiting rod 6. A moving plate 10 is provided above the positioning plate 7. A spring 9 is provided on the inner wall of the moving plate 10. A stripping block 8 is provided on the side of the spring 9 away from the inner wall of the moving plate 10. A moving groove 11 is opened on the inner wall of the moving plate 10 corresponding to the stripping block 8. The stripping block 8 is elastically connected to the moving plate 10. By setting the lead screw 4, the motor 5, and the limiting rod 6, when the mold performs the preform injection stage, the operator can drive the motor 5 and the stripping block 8 to strip the preform. The spring 9 and the stripping block 8 ensure that the stripping block 8 can always be in close contact with the outer wall of the mold core 202.

[0025] Working principle: When the operator needs to replace the mold core 202, the operator manually rotates the rotating sleeve 203. At this time, the rotating sleeve 203 gradually disengages from the outer wall of the mold core 202. At this time, the limiting ring 206 releases the pressure on the outer wall of the mold core 202, and the limiting block 205 releases the pressure on the outer wall of the connecting rod 201. The operator can then disassemble the mold core 202 for maintenance and cleaning. When the operator needs to install the mold core 202, the operation is reversed. After the preform injection production is completed, the operator drives the motor 5 to run. At this time, the lead screw 4 rotates accordingly, and the moving plate 10 moves on the outer wall of the limiting rod 6, driving the stripping block 8 to move simultaneously, pushing the preform out of the outer wall of the mold core 202. At the same time, the spring 9 applies pressure to the stripping block 8, so that the stripping block 8 can always be in close contact with the outer wall of the mold core 202. The above is the working process of the entire device. All contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A preform mold for producing PET preforms, comprising a fixed base (1) and a rotating assembly, characterized in that: A rotating assembly is fixedly connected to the top of the outer wall of the fixed base (1). The rotating assembly includes a connecting rod (201). A mold core (202) is sleeved on the outer wall of the connecting rod (201). A rotating sleeve (203) is sleeved on the outer wall of the mold core (202). A telescopic groove (204) is opened on the outer wall of the mold core (202). A limit block (205) is fixedly connected to the inner wall of the mold core (202). A limit ring (206) is fixedly connected to the inner wall of the rotating sleeve (203). A threaded groove (207) is opened at the corresponding position of the outer wall of the mold core (202) and the rotating sleeve (203). The mold core (202) and the rotating sleeve (203) are threadedly connected. The connecting rod (201) and the mold core (202) are slidably connected.

2. The injection mold for producing PET preforms according to claim 1, characterized in that: A mold sleeve (3) is provided above the mold core (202), and a motor (5) is provided on the left side of the outer wall of the connecting rod (201).

3. The injection mold for producing PET preforms according to claim 2, characterized in that: The motor (5) is fixedly connected to the fixed base (1), and the output end of the motor (5) is provided with a lead screw (4).

4. The injection mold for producing PET preforms according to claim 2, characterized in that: The connecting rod (201) has a limiting rod (6) on the right side of its outer wall, and the limiting rod (6) is fixedly connected to the fixing seat (1).

5. The injection mold for producing PET preforms according to claim 4, characterized in that: The limiting rod (6) is fitted with a positioning plate (7) on its outer wall, and a moving plate (10) is provided above the positioning plate (7).

6. The injection mold for producing PET preforms according to claim 5, characterized in that: The inner wall of the movable plate (10) is provided with a spring (9), and a stripping block (8) is provided on the side of the spring (9) away from the inner wall of the movable plate (10).

7. A preform mold for PET preform production according to claim 6, characterized in that: The inner wall of the moving plate (10) is provided with a moving groove (11) corresponding to the stripping block (8), and the stripping block (8) is elastically connected to the moving plate (10).

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