PET plastic bottle blank injection mold

Abstract

The utility model relates to the field of accommodation molds, and discloses a PET (Polyethylene Terephthalate) plastic bottle blank injection mold which comprises a female mold and a male mold arranged in a cavity of the female mold, the guide pipe is movably arranged in the male mold in a sleeving manner; the ventilation opening I is formed in the surface of the male mold; the second ventilation opening is formed in the surface of the guide pipe; the baffle is fixed on the outer surface of one end of the male die away from the female die; the spring sleeves the outer surface of the guide pipe; the limiting plate is fixed on the outer surface of one end of the conduit close to the baffle. The guide pipe is mounted in the male die, the vent holes are formed in the surfaces of the male die and the guide pipe, the male die and the guide pipe are staggered, the vent holes of the male die and the vent holes of the guide pipe coincide with each other, cold air can enter the space between the male die and the blank body from the vent holes, cooling of the male die and the blank body is accelerated, and the blank body is conveniently and rapidly separated from the male die; and the production efficiency of the blank is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold for a PET plastic bottle embryo. Background Art

[0002] The production process of plastic bottles generally has two steps: the first step is the injection molding process, which is to add the plastic raw materials into the injection molding machine, heat and melt it to plasticize and extrude the molten parison, maintain the temperature state inside the parison to avoid complete cooling; the second step is the blow molding process, which is to put the molten parison into the mold of the plastic bottle and blow it into shape. After completion, it is cooled and shaped, and then taken out of the mold, and the waste edges are trimmed to obtain the finished product.

[0003] However, the existing injection mold structure design is single, which makes it difficult to demould the plastic product after cooling and solidification. It requires a long time to cool or the cooling effect is poor, which affects the injection efficiency. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a PET plastic bottle embryo injection mold, which solves the problems mentioned in the above background.

[0005] The utility model provides the following technical solutions:

[0006] The utility model discloses a PET plastic bottle embryo injection mold, comprising a mother mold,

[0007] The male mold is installed in the cavity of the female mold;

[0008] The catheter and the movable sleeve are arranged inside the male mold;

[0009] Ventilation port 1 is provided on the surface of the male mold;

[0010] The second vent is provided on the surface of the conduit;

[0011] A baffle is fixed to the outer surface of the male mold away from the female mold;

[0012] A spring is sleeved on the outer surface of the catheter;

[0013] The limiting plate is fixed on the outer surface of one end of the conduit close to the baffle.

[0014] Furthermore, an injection hole is provided on a surface of the female mold which is away from the male mold.

[0015] Furthermore, both sides of the mother mold are connected with water cooling pipes.

[0016] Furthermore, a side of the limiting plate away from the mother mold is connected to a push rod through a support rod.

[0017] Furthermore, a section of the conduit away from the mother mold is connected with a ventilation pipe.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] 1. The utility model installs a conduit inside the male mold, opens ventilation holes on the surfaces of the male mold and the conduit, and displaces the male mold and the conduit so that the ventilation holes of the male mold and the conduit overlap with each other. Cold air can enter between the male mold and the embryo body from the ventilation holes, thereby accelerating the cooling of the male mold and the embryo body, allowing the embryo body to be quickly cooled and formed, while facilitating rapid separation of the embryo body from the male mold, thereby improving the production efficiency of the embryo body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0021] Figure 2 It is a structural cross-sectional view of the utility model;

[0022] Figure 3 This is a three-dimensional structural diagram of the assembly of the male mold in the utility model;

[0023] Figure 4 This is a split three-dimensional structural diagram of the male mold and the catheter in the utility model;

[0024] The numbers in the figure represent: 1. female mold; 2. male mold; 3. injection hole; 4. water cooling pipe; 5. conduit; 6. vent 1; 7. vent 2; 8. baffle; 9. spring; 10. limit plate; 11. push rod; 12. ventilation pipe. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-4, including a female mold 1 and a male mold 2, which are installed in the cavity of the female mold 1. The end of the male mold 2 away from the female mold 1 is a hollow structure with a guide groove inside; a catheter 5 is movably sleeved inside the male mold 2, and the end of the catheter 5 away from the female mold 1 extends outward for a distance, so that the length of the catheter 5 is greater than the male mold 2, and a guide block is fixed on the surface of the catheter 5, and the guide block matches the guide groove of the male mold 2. Through the assembly of the guide block and the guide groove, the male mold 2 and the catheter 5 can only move in a straight line when they are active, and the male mold 2 and the catheter 5 are prevented from making relative rotational motion; a vent 1 6 is opened on the surface of the male mold 2, and the distances between the vents 1 6 are equal; a vent 2 7 is opened on the surface of the catheter 5, and the vents 2 are equidistant from each other. The air vent 1 6 is on the same straight line. When the conduit 5 moves a certain distance, the air vent 1 6 and the air vent 2 7 can overlap with each other. The baffle 8 is fixed on the outer surface of the end of the male mold 2 away from the female mold 1. The baffle 8 can be used to close one side of the female mold 1 to prevent the liquid material from seeping out during injection molding, and at the same time, the baffle 8 limits the depth of the male mold 2 penetrating into the cavity of the female mold 1. The spring 9 is sleeved on the outer surface of the conduit 5, and one end is against the side of the baffle 8 away from the female mold 1; the limiting plate 10 is fixed on the outer surface of the conduit 5 close to the baffle 8. The spring 9 is located between the baffle 8 and the limiting plate 10. The groups of conduits 5 are fixedly connected by the limiting plate 10, and the conduits 5 are driven to move by moving the limiting plate 10. , so that the male mold 2 sleeved on the outer surface of the conduit 5 approaches or moves away from the female mold 1. When the embryo needs to be injected, the limiting plate 10 is moved in the direction of the female mold 1, so that the limiting plate 10 drives the male mold 2 to move into the cavity of the female mold 1 through the conduit 5. After the male mold 2 enters the female mold 1, the baffle 8 determines the distance that the male mold 2 penetrates into the female mold 1, and there is a spring 9 between the baffle 8 and the limiting plate 10. When the male mold 2 is limited by the baffle 8, the conduit 5 can still move a distance toward the female mold 1 to fully compress the spring 9 until the limiting plate 10 fixes the male mold 2 through the spring 9 to prevent the male mold 2 from moving during injection molding. When the embryo needs to be demolded, the male mold 2 The male mold 2 is cooled with the conduit 5, and the male mold 2 is moved away from the female mold 1. A spring 9 is arranged between the conduit 5 and the male mold 2. When the conduit 5 moves a certain distance away from the female mold 1, the pressure on the spring 9 can be completely reduced, so that the baffle 8 and the female mold 1 are released from the restriction and move with the conduit 5. Since the conduit 5 moves before the male mold 2, the conduit 5 and the male mold 2 are misaligned. After the male mold 2 and the conduit 5 are misaligned, the vent 1 6 on the surface of the male mold 2 is aligned with the vent 2 7 on the surface of the conduit 5. By passing cold air into the conduit 5, the cold air enters between the male mold 2 and the embryo through the vent hole, thereby accelerating the cooling speed of the embryo and the male mold 2, thereby improving the efficiency of the embryo demoulding.

[0027] An injection hole 3 is provided on a surface of the female mold 1 which is away from the male mold 2 .

[0028] Both sides of the mother mold 1 are connected with water cooling pipes 4 , and a circulating water cooling channel is arranged inside the mother mold 1 , and the mother mold 1 is water-cooled through the water cooling pipes 4 .

[0029] The side of the limiting plate 10 away from the mother mold 1 is connected to a push rod 11 through a support rod. The movement of the limiting plate 10 is controlled by the push rod 11, so that the limiting plate 10 drives the catheter 5 to move.

[0030] A section of the conduit 5 away from the mother mold 1 is connected to a ventilation pipe 12 , through which each conduit 5 is ventilated.

[0031] Working principle: when injecting the plastic bottle embryo, first push the male mold 2 into the cavity of the female mold 1 through the push rod 11, block one side of the female mold 1 through the baffle 8, so that a relatively closed mold cavity is formed inside the female mold 1, and the mold cavity inside the female mold 1 is injected through the injection hole 3. After injection, the female mold 1 is water-cooled through the water-cooling pipe 4 to quickly cool the female mold 1 and facilitate the demoulding of the embryo. After the embryo is formed, the male mold 2 is moved away from the female mold 1 through the push rod 11, and the push rod 11 passes through the limit The plate 10 drives the conduit 5 to move. When the conduit 5 moves, the spring 9 still presses against the baffle 8, so that the male mold 2 and the conduit 5 cannot move at the same time. After the conduit 5 moves a certain distance, the pressure of the spring 9 disappears, and the male mold 2 can move with the conduit 5. At this time, the male mold 2 and the water-cooling tube 4 are misaligned, and the vents on the surface of the male mold 2 and the conduit 5 overlap. The cold air inside the conduit 5 enters between the male mold 2 and the embryo through the vents, accelerating the cooling speed of the male mold 2 and the embryo, and facilitating the rapid demolding of the embryo.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A PET plastic bottle embryo injection mold, comprising a mother mold (1), It is characterized in that Also included are: A male mold (2) is installed in the cavity of the female mold (1); A catheter (5) is movably sleeved inside the male mold (2); A vent (6) is provided on the surface of the male mold (2); A second vent (7) is provided on the surface of the conduit (5); A baffle (8) is fixed on the outer surface of the end of the male mold (2) away from the female mold (1); A spring (9) is sleeved on the outer surface of the catheter (5); The limiting plate (10) is fixed on the outer surface of one end of the conduit (5) close to the baffle (8).

2. The PET plastic bottle embryo injection mold according to claim 1, characterized in that: An injection hole (3) is provided on a surface of the female mold (1) which is away from the male mold (2).

3. The PET plastic bottle embryo injection mold according to claim 1, characterized in that: Both sides of the mother mold (1) are connected with water cooling pipes (4).

4. The PET plastic bottle embryo injection mold according to claim 1, characterized in that: The side of the limiting plate (10) away from the mother mold (1) is connected to a push rod (11) via a support rod.

5. The PET plastic bottle embryo injection mold according to claim 1, characterized in that: A section of the conduit (5) away from the mother mold (1) is connected to a ventilation pipe (12).

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