A blow molding machine die head

Abstract

This utility model provides a blow molding machine die head for use in a blow molding machine for manufacturing beverage bottles by blow molding. The die head includes: a cylinder having an inlet for the inflow of molten plastic to form the beverage bottle and a hollow cavity; and a mandrel disposed within the cavity. The mandrel has flow channels for distributing the molten plastic, including a main flow channel and multiple vertical flow channels, all of which are connected to the main flow channel. The multiple vertical flow channels are evenly distributed along the circumference of the mandrel, and the length direction of each vertical flow channel is perpendicular to the horizontal direction.

Description

Technical Field

[0001] This utility model relates to the technical field of blow molding machines, and specifically to a blow molding machine die head. Background Technology

[0002] The blow molding die head is one of the most important components in the blow molding process. Its main function is to transform molten plastic from the linear motion of the extruder into the desired shape. It controls the flow of the plastic melt through the cooperation of the cylinder and the flow channel groove on the internal mandrel, so that the plastic melt forms the preset shape during the blow molding process, and ensures molding accuracy and quality.

[0003] Currently, some beverage bottles manufactured on the market use less molten plastic during production, resulting in a softer bottle body and a poor grip. To improve this, a common practice is to use more molten plastic to thicken the bottle body. However, most blow molding machine dies use a method of uniformly distributing the molten plastic, requiring overall thickening when increasing the bottle body, thus necessitating the use of even more molten plastic. In mass production, this significantly increases the amount of raw materials required, leading to a substantial increase in production costs. Utility Model Content

[0004] This invention was developed to solve the above-mentioned problems, and its purpose is to provide a blow molding machine die head.

[0005] This utility model provides a blow molding die head for use in a blow molding machine for manufacturing beverage bottles by blow molding. It features a cylinder having an inlet for the inflow of molten plastic to form the beverage bottle and a hollow cavity; and a mandrel disposed within the cavity, wherein the mandrel has flow channels for distributing the molten plastic, the flow channels including a main flow channel and multiple vertical flow channels, all of which are connected to the main flow channel.

[0006] The blow molding die head provided by this utility model may also have the following feature: multiple vertical straight grooves are evenly distributed on the mandrel along the circumferential direction, and the length direction of each vertical straight groove is perpendicular to the horizontal direction.

[0007] The blow molding die head provided by this utility model may also have the following feature: the width of the vertical straight channel groove is 1-5mm.

[0008] The blow molding die head provided by this utility model may also have the following feature: the interval between two adjacent vertical straight channel grooves is 5-10mm.

[0009] The blow molding die head provided by this utility model may also have the following features: the distance from the bottom of the vertical straight channel groove to the cavity wall is 3-8mm, and the distance from the smooth surface of the mandrel to the cavity wall is 2-6mm.

[0010] Functions and effects of utility models

[0011] According to the blow molding machine die head involved in this embodiment, by opening uniformly distributed vertical straight grooves on the mandrel, the blow molding machine die head produces plastic bottles with the overall shape of vertically shaped raised sections and smooth sections interspersed. Without making the overall thickness, it can achieve a grip feel that is basically the same as that of plastic bottles with increased overall thickness. When mass production is carried out in the factory, it can greatly reduce the raw materials required and save production costs. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the blow molding machine die head in an embodiment of this utility model;

[0013] Figure 2 This is a top view of the vertical DC channel structure of the cylinder and mandrel in the embodiment of this utility model;

[0014] Figure 3 This is a schematic diagram of the vertical DC channel groove of the cylinder and mandrel in an embodiment of this utility model.

[0015] Explanation of symbols for main components:

[0016] In the diagram: 100, blow molding machine die head; 1, cylinder body; 101, feed inlet; 102, cavity; 2, mandrel; 200, runner groove; 201, main runner groove; 202, vertical runner groove. Detailed Implementation

[0017] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0018] To make the technical means, creative features, objectives and effects of this utility model easy to understand, the following embodiments, in conjunction with the accompanying drawings, will specifically illustrate the blow molding machine die head of this utility model.

[0019] Figure 1This is a schematic diagram of the structure of the blow molding machine die head 100 in an embodiment of this utility model.

[0020] like Figure 1 As shown, the blow molding machine die head 100 in this embodiment includes a cylinder 1 and a mandrel 2.

[0021] The cylinder 1 has an inlet 101 for the flow of molten plastic to form a beverage bottle and a hollow cavity 102. The inlet 101 is located on the upper side of one side of the cylinder 1.

[0022] The mandrel 2 is disposed within the cavity 102. The mandrel 2 has flow channels 200 for distributing the molten plastic. The flow channels 200 include a main flow channel 201 and multiple vertical flow channels 202, all of which are connected to the main flow channel 201. In this embodiment, the main flow channel 201 is annular. In other embodiments, as an alternative, the shape of the main flow channel 201 can be adjusted to a spiral or other shapes as needed.

[0023] Figure 2 This is a top view of the vertical DC channel 202 structure of the cylinder body 1 and the mandrel 2 in this embodiment of the present invention.

[0024] Figure 3 This is a schematic diagram of the vertical DC channel 202 of the cylinder body 1 and the mandrel 2 in the embodiment of this utility model.

[0025] like Figure 1-3 As shown, multiple vertical DC grooves 202 are evenly distributed on the core rod 2 along the circumferential direction, and the length direction of each vertical DC groove 202 is perpendicular to the horizontal direction.

[0026] like Figure 2 As shown, due to the gap between the inner wall of the cylinder 1 and the mandrel 2, the molten plastic flows into the cavity 102 of the cylinder 1 through the inlet 101 and then into the gap, further flowing into the vertical direct current channel 202 via the main current channel 201 on the mandrel 2. During the subsequent blow molding process to form a plastic bottle, the molten plastic in these vertical direct current channels 202 forms thicker, approximately vertically extending strip-shaped protrusions on the plastic bottle wall.

[0027] The width of the vertical DC channel 202 and the spacing between two adjacent vertical DC channel 202 are set according to the diameter of the mandrel 2 and the number of protrusions on the wall of the plastic bottle. The distance from the bottom of the vertical DC channel 202 to the wall of the cavity 102 and the distance from the smooth surface of the mandrel 2 to the wall of the cavity 102 are set according to the thickness of the plastic melt and the weight of a single plastic bottle.

[0028] Specifically, in this embodiment, the width of the vertical DC channel 202 is 1-5mm; the interval between two adjacent vertical DC channel 202 is 5-10mm; the distance from the bottom of the vertical DC channel 202 to the wall of the cavity 102 is 3-8mm; and the distance from the smooth surface of the mandrel 2 to the wall of the cavity 102 is 2-6mm.

[0029] As a result, the produced plastic bottle wall has an overall shape with alternating vertical raised sections and smooth sections, achieving a gripping feel that is essentially the same as a plastic bottle with increased overall thickness without needing to make the entire bottle thicker.

[0030] Functions and effects of the embodiments

[0031] According to the blow molding die head involved in this embodiment, by opening uniformly distributed vertical straight grooves 202 on the mandrel 2, the blow molding die head 100 produces plastic bottles with the overall shape of vertically shaped protruding sections and smooth sections interspersed. Without making the whole body thicker, it can achieve a gripping feel that is basically the same as that of plastic bottles with increased overall thickness. When mass production is carried out in the factory, it can greatly reduce the raw materials required and save production costs.

[0032] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A blow molding machine die for use in a blow molding machine for making beverage bottles by blow molding, characterized by, include: The cylinder has an inlet for the inflow of molten plastic forming the beverage bottle and a hollow cavity; A mandrel is disposed within the cavity. The mandrel has flow channels for distributing the molten plastic. The flow channel includes a main flow channel and multiple vertical direct flow channels. All of the vertical DC channel slots are connected to the main channel slot.

2. The blow molding machine die head according to claim 1, characterized in that: wherein Multiple vertical DC channel slots are evenly distributed along the circumferential direction on the mandrel. The length direction of each of the vertical DC channel slots is perpendicular to the horizontal direction.

3. The blow molding machine die head according to claim 2, characterized in that: wherein, The width of the vertical DC channel is 1-5mm.

4. The blow molding machine die head according to claim 3, characterized in that: in, The interval between two adjacent vertical DC channel slots is 5-10mm.

5. The blow molding machine die head according to claim 4, characterized in that: in, The distance from the bottom of the vertical DC channel to the inner wall of the cavity is 3-8 mm, and the distance from the smooth surface of the mandrel to the inner wall of the cavity is 2-6 mm.

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