A tightly combined plastic kettle blow molding machine mold

Abstract

The present invention discloses a plastic kettle blow molding machine mold with a tight combination, including a template, a mold body, a flange, a pressing head, and a lifting device. There are two templates, which are arranged opposite to each other. A mold body is fixed on each of the opposite sides of the two templates, and the two mold bodies are tightly attached together. A mold cavity is provided inside the mold body, and the mold cavities of the two mold bodies form a model cavity for forming a plastic kettle. An inlet connected to the model cavity is provided at the top of the combined body of the two mold bodies. Flanges are provided on both sides of the fitting sides of the mold bodies, and the flanges on the two mold bodies are symmetrical to each other. The fitting flanges on the two mold bodies form a pressing part, and the pressing part is a rhombus with sharp corners cut off at both the upper and lower ends. A pressing head is provided above and below the pressing part. By cooperating the flange, the pressing head, and the lifting device, the mold of the present invention is tightly combined, and the two mold bodies are not easily separated during blowing, effectively ensuring the quality of blow molding.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic products, especially the technical field of molds. Background Art

[0002] Blow molding, also known as hollow blow molding, is a rapidly developing plastic processing method. A tubular plastic preform obtained by extrusion or injection molding of a thermoplastic resin is placed in a split mold while it is still hot. After closing the mold, compressed air is immediately introduced into the preform, causing the plastic preform to expand and adhere tightly to the inner wall of the mold. After cooling and demolding, various hollow products are obtained. The manufacturing process of blown film is very similar to that of hollow product blow molding in principle, but it does not use a mold. From the perspective of plastic processing technology classification, the forming process of blown film is usually classified as extrusion. The blow molding process began to be used for the production of small bottles made of low-density polyethylene during World War II. In the late 1950s, with the birth of high-density polyethylene and the development of blow molding machines, blow molding technology has been widely used. The volume of hollow containers can reach several thousand liters, and some production has adopted computer control. Plastics suitable for blow molding include polyethylene, polyvinyl chloride, polypropylene, polyester, etc., and the resulting hollow containers are widely used as industrial packaging containers. When the mold of a blow molding machine is in use, due to the need for air injection, gaps are likely to occur between the two half-molds, and even the mold may disintegrate, which will affect the quality of the product. Summary of the Invention

[0003] The purpose of the present invention is to solve the problems in the prior art and propose a mold for a plastic kettle blow molding machine with a tight combination, which can make the mold tightly combined and not easily disintegrate.

[0004] To achieve the above purpose, the present invention proposes a mold for a plastic kettle blow molding machine with a tight combination, including a template, a mold body, a flange, a pressing head, and a lifting device. There are two templates, which are arranged opposite to each other. A mold body is fixed on each of the opposite sides of the two templates. The two mold bodies are closely attached to each other. A mold cavity is provided in the mold body. The mold cavities of the two mold bodies form a model cavity for forming a plastic kettle. An inlet connected to the model cavity is provided at the top of the combination of the two mold bodies. Flanges are provided on both sides of the mating sides of the mold bodies. The flanges on the two mold bodies are symmetrical to each other. The mating flanges on the two mold bodies form a pressing part. The pressing part is a rhombus with the sharp corners cut off at both the upper and lower ends. A pressing head is provided above and below the pressing part. A pressing groove adapted to the pressing part is provided at the bottom of the upper pressing head and the top of the lower pressing head. The cross-section of the pressing groove is an isosceles trapezoid adapted to the pressing part. Both pressing heads are connected to a lifting device.

[0005] Preferably, a positioning groove is provided on the template, and the mold body is embedded in the positioning groove.

[0006] Preferably, a plurality of positioning holes are provided on the template, and a plurality of positioning rods corresponding to the positioning holes are provided on the die body. The positioning rods pass through the positioning holes, and a screw rod is fixed to the end of each positioning rod, and a nut is screwed onto the screw rod.

[0007] Preferably, the outer diameter of the screw rod is smaller than that of the positioning rod. The side of the nut close to the template is an auxiliary sleeve, the diameter of the auxiliary sleeve is larger than that of the positioning rod, and the length of the auxiliary sleeve is greater than the length of the part of the positioning rod protruding from the template.

[0008] Preferably, a liquid inlet pipe and a liquid outlet pipe are provided on the die body, and a cooling cavity is provided inside the die body. Both the liquid inlet pipe and the liquid outlet pipe are communicated with the cooling cavity.

[0009] Preferably, a plurality of jacks are provided on the side wall of the cooling cavity close to the mold cavity, and cooling rods are inserted into the jacks.

[0010] Preferably, the four pressing heads above and below the die body operate synchronously.

[0011] Advantages of the present invention: By cooperating the flange, the pressing head and the lifting device, the mold is tightly combined, and the two die bodies are not easily separated during blowing, effectively ensuring the quality of blow molding; the cooling cavity cooperates with the cooling rods to enable the die body to be quickly and effectively cooled, improving production efficiency.

[0012] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the drawings. Brief Description of the Drawings

[0013] Figure 1 is the front view of a mold for a plastic water kettle blow molding machine with a tight combination of the present invention;

[0014] Figure 2 is the side view of the die body of a mold for a plastic water kettle blow molding machine with a tight combination of the present invention;

[0015] Figure 3 is the internal schematic diagram of the die body of a mold for a plastic water kettle blow molding machine with a tight combination of the present invention.

[0016] In the figure: 1 - template, 2 - die body, 3 - pressing head, 4 - cooling cavity, 10 - positioning groove, 11 - positioning hole, 20 - mold cavity, 21 - feed port, 22 - flange, 25 - positioning rod, 26 - screw rod, 27 - nut, 28 - auxiliary sleeve, 30 - lifting device, 31 - pressing groove, 40 - jack, 41 - cooling rod. Detailed Embodiments

[0017] Refer to Figure 1 、 Figure 2 and Figure 3, a mold for a plastic water kettle blow molding machine with a tight combination of the present invention, includes a template 1, a mold body 2, a flange 22, a pressing head 3, and a lifting device 30. There are two templates 1, which are arranged opposite to each other. A mold body 2 is fixed to each of the opposite sides of the two templates 1. The two mold bodies 2 are closely attached together. A mold cavity 20 is provided inside the mold body 2. The mold cavities 20 of the two mold bodies 2 form a model cavity for forming a plastic water kettle. An inlet 21 connected to the model cavity is provided at the top of the combination of the two mold bodies 2. Flanges 22 are provided on both sides of the fitting sides of the mold bodies 2. The flanges 22 on the two mold bodies 2 are symmetrical to each other. The fitting flanges 22 on the two mold bodies 2 form a pressing part. The pressing part is a rhombus with sharp corners cut off at both the upper and lower ends. A pressing head 3 is provided above and below the pressing part. A pressing groove 31 adapted to the pressing part is provided at the bottom of the pressing head 3 located above and at the top of the pressing head 3 located below. The cross-section of the pressing groove 31 is an isosceles trapezoid adapted to the pressing part. Both pressing heads 3 are connected to a lifting device 30. A positioning groove 10 is provided on the template 1, and the mold body 2 is embedded in the positioning groove 10. A number of positioning holes 11 are provided on the template 1, and a number of positioning rods 25 corresponding to the positioning holes 11 are provided on the mold body 2. The positioning rods 25 pass through the positioning holes 11, and a screw 26 is fixed at the end of the positioning rod 25. A nut 27 is screwed on the screw 26. The outer diameter of the screw 26 is smaller than the outer diameter of the positioning rod 25. The side of the nut 27 close to the template 1 is an auxiliary sleeve 28. The diameter of the auxiliary sleeve 28 is larger than the diameter of the positioning rod 25. The length of the auxiliary sleeve 28 is greater than the length of the part of the positioning rod 25 that passes through the template 1. A liquid inlet pipe and a liquid outlet pipe are provided on the mold body 2. A cooling cavity 4 is provided inside the mold body 2. The liquid inlet pipe and the liquid outlet pipe are both connected to the cooling cavity 4. A number of jacks 40 are provided on the side wall of the cooling cavity 4 close to the mold cavity 20, and cooling rods 41 are inserted into the jacks 40. The four pressing heads 3 above and below the mold body 2 operate synchronously.

[0018] The working process of the present invention:

[0019] During the working process of a mold for a plastic water kettle blow molding machine with a tight combination of the present invention, the flange 22, the pressing head 3, and the lifting device 30 cooperate with each other, making the mold tightly combined. When blowing air, the two mold bodies 2 are not easily separated, effectively ensuring the quality of blow molding; the cooling cavity 4 cooperates with the cooling rods 41 to enable the mold body 2 to be quickly and effectively cooled, improving the production efficiency.

[0020] The above embodiments are descriptions of the present invention, not limitations on the present invention. Any solution obtained by simply transforming the present invention belongs to the protection scope of the present invention.

Claims

1. A tightly combined plastic kettle blow molding machine die, characterized in that: It includes a template (1), a die body (2), a flange (22), a pressing head (3), and a lifting device (30). There are two templates (1), and the two templates (1) are arranged oppositely. A die body (2) is fixed to each of the opposite sides of the two templates (1), and the two die bodies (2) are closely attached together. A die cavity (20) is provided in the die body (2), and the die cavities (20) of the two die bodies (2) form a model cavity for forming a plastic kettle. An inlet (21) connected to the model cavity is provided at the top of the combination of the two die bodies (2). Flanges (22) are provided at both side edges of the fitting sides of the die bodies (2). The flanges (22) on the two die bodies (2) are symmetrical to each other, and the fitting flanges (22) on the two die bodies (2) form a pressing part. The pressing part is a rhombus with sharp corners cut off at both upper and lower ends. A pressing head (3) is provided above and below the pressing part. A pressing groove (31) adapted to the pressing part is provided at the bottom of the pressing head (3) located above and at the top of the pressing head (3) located below. The cross-section of the pressing groove (31) is an isosceles trapezoid adapted to the pressing part. Both pressing heads (3) are connected to a lifting device (30). A number of positioning holes (11) are provided on the template (1), and a number of positioning rods (25) corresponding to the positioning holes (11) are provided on the die body (2). The positioning rods (25) pass through the positioning holes (11), and a screw (26) is fixed to the end of the positioning rod (25). A nut (27) is screwed on the screw (26). The outer diameter of the screw (26) is smaller than the outer diameter of the positioning rod (25). The side of the nut (27) close to the template (1) is an auxiliary sleeve (28). The diameter of the auxiliary sleeve (28) is larger than the diameter of the positioning rod (25), and the length of the auxiliary sleeve (28) is greater than the length of the part of the positioning rod (25) passing through the template (1). A liquid inlet pipe and a liquid outlet pipe are provided on the die body (2). A cooling cavity (4) is provided in the die body (2), and the liquid inlet pipe and the liquid outlet pipe are both communicated with the cooling cavity (4). A number of jacks (40) are provided on the side wall of the cooling cavity (4) close to the die cavity (20), and cooling rods (41) are inserted into the jacks (40).

2. The tightly combined plastic kettle blow molding machine die according to claim 1, characterized in that: A positioning groove (10) is provided on the template (1), and the die body (2) is embedded in the positioning groove (10).

3. The tightly combined plastic kettle blow molding machine die according to claim 1, characterized in that: The four pressing heads (3) above and below the die body (2) operate synchronously.

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