One-step injection stretch blow molding apparatus

Abstract

The utility model discloses one -step method injection -stretch -blow forming device, include: line position mechanism and positioning mechanism, the line position mechanism includes: fixed plate, left line position and right line position, be equipped with line position groove on the fixed plate, left line position and right line position are all slidingly equipped in line position groove, all be equipped with pouring groove on left line position and right line position, two pouring groove form pouring cavity, and the pouring cavity has bottle body chamber and handle chamber, the positioning mechanism includes: positioning spring and positioning jib, be equipped with positioning groove on the fixed plate, and the positioning groove is located handle chamber below, and is connected with handle chamber, the positioning spring is located the bottom of positioning groove, the positioning jib is located the top of positioning spring, and the upper end of positioning jib stretches into handle chamber. The utility model discloses handle is fixed in left line position and right line position between through positioning jib, avoids handle to be pulled by left line position or right line position when opening mould, appears the phenomenon of handle to be pulled off, guarantees the production efficiency of product.

Description

Technical Field

[0001] This utility model relates to the field of plastic molding technology, and in particular to a one-step injection stretch blow molding apparatus. Background Technology

[0002] One-step injection stretch blow molding is the core process for producing high-performance plastic bottles. It completes three steps consecutively on the same equipment: first, injection molding a tubular preform and precisely forming the bottle neck; next, precise temperature control of the hot preform; and finally, longitudinal stretching and high-pressure blow molding, causing bidirectional molecular orientation, greatly improving strength and transparency. This process is highly integrated, energy-efficient, and clean, making it particularly suitable for packaging of beverages, pharmaceuticals, and other products with stringent hygiene and performance requirements. It is also suitable for large-scale, high-efficiency production of a single product. In existing technologies, because the preform and handle are soft after molding, during the preform opening process, the handle is ejected by opening the mold on both sides of the slide mold. The slide may pull the handle, causing it to be pulled away by the left and right slides and break, affecting production efficiency. Summary of the Invention

[0003] According to an embodiment of the present invention, a one-step injection stretch blow molding apparatus is provided, comprising: a sliding mechanism and a positioning mechanism;

[0004] The sliding mechanism includes: a fixed plate, a left sliding mechanism, and a right sliding mechanism;

[0005] The fixed plate is provided with a sliding groove, and the left sliding position and the right sliding position are slidably disposed in the sliding groove. The left sliding position and the right sliding position are provided with a casting groove, and the two casting grooves form a casting cavity. The casting cavity has a bottle body cavity and a handle cavity.

[0006] The positioning mechanism includes: a positioning spring and a positioning push rod;

[0007] The fixing plate has a positioning groove, which is located below and communicates with the handle cavity. The positioning spring is located at the bottom of the positioning groove, and the positioning top rod is located above the positioning spring. The upper end of the positioning top rod extends into the handle cavity.

[0008] Furthermore, the positioning push rod includes: a cylindrical push rod, a first step block, and a second step block;

[0009] The cylindrical top rod has a first step block and a second step block on its surface. The first step block is located above the second step block. The positioning spring is sleeved on the first end of the cylindrical top rod, and the upper end of the positioning spring abuts against the lower surface of the second step block.

[0010] Furthermore, the positioning mechanism also includes: a pressure block;

[0011] The pressure block is located at the opening of the positioning groove, and a push rod opening is provided on the pressure block. The second end of the cylindrical push rod extends into the handle cavity from the push rod opening, and the first stepped block can pass through the push rod opening.

[0012] Furthermore, the two sides of the row slot are inclined, and the outer surfaces of the left and right row slots are also inclined.

[0013] Furthermore, the positioning mechanism further includes: a lip mold;

[0014] The lip mold is located between the left and right positions, with its lower end extending into the bottle cavity and positioned corresponding to the bottle opening.

[0015] Furthermore, the positioning mechanism also includes: an injection cavity tube;

[0016] The injection tube is located on the fixed plate and below the left and right positions, and the injection tube is connected to the casting cavity.

[0017] According to the one-step injection stretch blow molding apparatus of this utility model embodiment, after the injection material is introduced into the casting cavity, the plastic bottle is formed in the casting cavity. During the mold opening process, the left and right slides are moved diagonally upward to separate the left and right slides. In the vertical direction, the positioning ejector moves upward under the action of the positioning spring, so that the positioning ejector moves upward synchronously with the left and right slides. In the horizontal direction, the positioning ejector fixes the handle in the middle between the left and right slides to prevent the handle from being pulled by the left or right slides during mold opening, which would cause the handle to break.

[0018] It should be understood that both the foregoing general description and the following detailed description are exemplary and intended to provide further illustration of the claimed technology. Attached Figure Description

[0019] Figure 1 This is a structural diagram of a one-step injection stretch blow molding apparatus according to an embodiment of the present invention;

[0020] Figure 2 This is a side view of a one-step injection stretch blow molding apparatus according to an embodiment of the present invention;

[0021] Figure 3 This is a mold opening structure diagram of a one-step injection stretch blow molding device according to an embodiment of the present invention;

[0022] Figure 4 This is a mold-opening side view of a one-step injection stretch blow molding apparatus according to an embodiment of the present invention;

[0023] Figure 5 This is a structural diagram of the positioning ejector rod of the one-step injection stretch blow molding device according to an embodiment of the present invention;

[0024] Figure 6 This is a structural diagram of the compression block of the one-step injection stretch blow molding device according to an embodiment of the present invention.

[0025] The attached diagram is labeled as follows: 1 is the fixed plate, 2 is the left travel position, 3 is the right travel position, 4 is the positioning spring, 5 is the positioning ejector rod, 51 is the cylindrical ejector rod, 52 is the first step block, 53 is the second step block, 6 is the pressure block, 7 is the lip mold, and 8 is the injection tube. Detailed Implementation

[0026] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, further illustrating the present invention.

[0027] First, combine Figures 1-6 This invention describes a one-step injection stretch blow molding apparatus according to an embodiment of the present invention, used for injection molding of plastic bottles.

[0028] like Figures 1-6 As shown, the one-step injection stretch blow molding device of this utility model includes: a sliding mechanism and a positioning mechanism;

[0029] The sliding mechanism includes: a fixed plate 1, a left sliding mechanism 2, and a right sliding mechanism 3;

[0030] The fixed plate 1 is provided with a sliding groove, and the left sliding position 2 and the right sliding position 3 are both slidably disposed in the sliding groove. The left sliding position 2 and the right sliding position 3 are both provided with a casting groove, and the two casting grooves form a casting cavity. The casting cavity has a bottle body cavity and a handle cavity.

[0031] The positioning mechanism includes: a positioning spring 4 and a positioning push rod 5;

[0032] The fixing plate 1 has a positioning groove, which is located below the handle cavity and communicates with it. The positioning spring 4 is located at the bottom of the positioning groove, and the positioning rod 5 is located above the positioning spring 4. The upper end of the positioning rod 5 extends into the handle cavity.

[0033] After the injection molding material is introduced into the casting cavity, the plastic bottle is formed in the casting cavity. During the mold opening process, the left slide 2 and the right slide 3 are moved diagonally upward to separate the left slide 2 and the right slide 3. In the vertical direction, the positioning ejector 5 moves upward under the action of the positioning spring 4, so that the positioning ejector 5 moves upward synchronously with the left slide 2 and the right slide 3. In the horizontal direction, the positioning ejector 5 fixes the handle between the left slide 2 and the right slide 3 to prevent the handle from being pulled by the left slide 2 or the right slide 3 during mold opening, which would cause the handle to break.

[0034] like Figures 4-6 As shown, the positioning push rod 5 includes: a cylindrical push rod 51, a first step block 52, and a second step block 53;

[0035] The cylindrical top rod 51 has a first step block 52 and a second step block 53 on its surface. The first step block 52 is located above the second step block 53. The positioning spring 4 is sleeved on the first end of the cylindrical top rod 51, and the upper end of the positioning spring 4 abuts against the lower surface of the second step block 53.

[0036] The positioning mechanism further includes: a pressure block 6;

[0037] The pressure block 6 is located at the opening of the positioning groove. The pressure block 6 has a push rod opening. The second end of the cylindrical push rod 51 extends into the handle cavity from the push rod opening. The first stepped block 52 can pass through the push rod opening.

[0038] In this embodiment, by installing a pressure block 6 at the opening of the positioning groove, the pressure block 6 restricts the movement distance of the positioning push rod 5. The distance of one end of the positioning push rod 5 is the distance from the pressure block 6 to the second step block 53. The second step block 53 and the pressure block 6 also restrict the cylindrical push rod 51 from fully extending out of the positioning groove, allowing the positioning push rod 5 to move upward a certain distance and then separate from the handle, facilitating the removal of the preform. During the reset process of the left and right moving positions 2 and 3, the left and right moving positions 2 and 3 will press the positioning push rod 5, pushing it back into the positioning groove and resetting the positioning push rod 5. The left and right moving positions 2 and 3 can be moved by a cylinder.

[0039] like Figures 1-4 As shown, the two sides of the row slot are inclined, and the outer surfaces of the left row slot 2 and the right row slot 3 are also inclined.

[0040] The positioning mechanism also includes: a lip mold 7;

[0041] The lip mold 7 is located between the left row position 2 and the right row position 3, and the lower end of the lip mold 7 extends into the bottle body cavity and is positioned corresponding to the bottle mouth.

[0042] The positioning mechanism further includes: an injection tube 8;

[0043] The injection tube 8 is located on the fixed plate 1 and below the left row position 2 and the right row position 3. The injection tube 8 is connected to the casting cavity.

[0044] In this embodiment, material can be introduced into the casting cavity through the injection tube 8. By tilting the two sides of the positioning groove, it is easy to move the left positioning 2 and the right positioning 3 obliquely upward. The molded plastic bottle can be pulled upward through the lip mold 7 to remove the plastic bottle.

[0045] Above, refer to Figures 1-6This invention describes a one-step injection stretch blow molding apparatus according to an embodiment of the present invention. After injection molding material is introduced into the casting cavity, the plastic bottle is formed in the casting cavity. During the mold opening process, the left slide 2 and the right slide 3 are moved diagonally upward to separate the left slide 2 and the right slide 3. In the vertical direction, the positioning ejector rod 5 moves upward under the action of the positioning spring 4, so that the positioning ejector rod 5 moves upward synchronously with the left slide 2 and the right slide 3. In the horizontal direction, the positioning ejector rod 5 fixes the handle between the left slide 2 and the right slide 3 to prevent the handle from being pulled by the left slide 2 or the right slide 3 during mold opening, which would cause the handle to break.

[0046] It should be noted that, in this specification, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0047] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above content. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A one-step injection stretch blow molding apparatus, characterized in that, include: The sliding mechanism and the positioning mechanism; The sliding mechanism includes: a fixed plate, a left sliding mechanism, and a right sliding mechanism; The fixed plate is provided with a sliding groove, and the left sliding position and the right sliding position are slidably disposed in the sliding groove. The left sliding position and the right sliding position are provided with a casting groove, and the two casting grooves form a casting cavity. The casting cavity has a bottle body cavity and a handle cavity. The positioning mechanism includes: a positioning spring and a positioning push rod; The fixing plate has a positioning groove, which is located below the handle cavity and communicates with it. The positioning spring is located at the bottom of the positioning groove, and the positioning top rod is located above the positioning spring. The upper end of the positioning top rod extends into the handle cavity.

2. The one-step injection stretch blow molding apparatus as described in claim 1, characterized in that, The positioning push rod includes: a cylindrical push rod, a first step block, and a second step block; The cylindrical top rod has a first step block and a second step block on its surface. The first step block is located above the second step block. The positioning spring is sleeved on the first end of the cylindrical top rod, and the upper end of the positioning spring abuts against the lower surface of the second step block.

3. The one-step injection stretch blow molding apparatus as described in claim 2, characterized in that, The positioning mechanism further includes: a pressure block; The pressure block is located at the opening of the positioning groove, and a push rod opening is provided on the pressure block. The second end of the cylindrical push rod extends into the handle cavity from the push rod opening, and the first stepped block can pass through the push rod opening.

4. The one-step injection stretch blow molding apparatus as described in claim 1, characterized in that, The two sides of the row slot are inclined, and the outer sides of the left and right row slots are also inclined.

5. The one-step injection stretch blow molding apparatus as described in claim 1, characterized in that, The positioning mechanism further includes: a lip mold; The lip mold is located between the left and right positions, with its lower end extending into the bottle cavity and positioned corresponding to the bottle opening.

6. The one-step injection stretch blow molding apparatus as described in claim 1, characterized in that, The positioning mechanism further includes: an injection tube; The injection tube is located on the fixed plate and below the left and right positions, and the injection tube is connected to the casting cavity.

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