One-step injection stretch blow molding handle demolding structure

Abstract

The utility model discloses one -step method injection -stretch -blow bottle embryo handle demoulding structure, include: line position mechanism and demoulding mechanism, the line position mechanism includes: left line position and right line position, left line position and right line position are opposite and set up, left line position and right line position contact surface are parting surface, left line position and right line position all are provided with mounting hole, and demoulding mechanism is located in mounting hole, demoulding mechanism includes: pressing plate, demoulding spring and demoulding top block, left line position and right line position all are equipped with pressing plate, and pressing plate is correspondingly set up mounting hole, one end of demoulding spring is connected with pressing plate, and the other end is connected with demoulding top block, and the front end of two demoulding top blocks is in parting surface and is abutted. The utility model can avoid breaking bottle embryo in the process of opening mould, and improves the demoulding speed of handle.

Description

Technical Field

[0001] This utility model relates to the technical field of preform manufacturing equipment, and in particular to a demolding structure for a one-step injection stretch blow molding preform handle. Background Technology

[0002] One-step injection stretch blow molding is a highly efficient and integrated plastic bottle molding process. A key characteristic of this process is that the preform is ejected from the mold while still soft and transferred to the blow molding station for final blow molding. When making bottles with handles using this method, both the preform and handle are soft at the time of ejection. The bottle handle is ejected using a sliding mold that opens from both sides. The handle's design includes grooves, which can make demolding difficult and may result in the preform breaking. Summary of the Invention

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

[0004] The row positioning mechanism includes: left row position and right row position;

[0005] The left and right sliding positions are arranged opposite to each other, and the contact surface between the left and right sliding positions is a parting surface. Mounting holes are provided on both the left and right sliding positions, and the demolding mechanism is located in the mounting holes.

[0006] The demolding mechanism includes: a pressure plate, a demolding spring, and a demolding top block;

[0007] Pressure plates are provided on both the left and right moving parts, and the pressure plates are set with corresponding mounting holes. One end of the demolding spring is connected to the pressure plate and the other end is connected to the demolding top block. The front ends of the two demolding top blocks abut against each other on the parting surface.

[0008] Furthermore, the demolding block includes: a cylindrical section, a baffle, and a top plate;

[0009] The mounting hole has a large diameter section and a small diameter section. The small diameter section is located on the side close to the parting surface. The baffle is located inside the large diameter section and at the connection between the large diameter section and the small diameter section. The demolding spring is located inside the large diameter section and sleeved on the cylindrical section. The top plate is located in the small diameter section.

[0010] Furthermore, the pressure plate is fixed to the left or right sliding position by bolts, and a support block is provided on the inner side of the pressure plate. The surface of the support block is inclined and parallel to the surface of the baffle.

[0011] Furthermore, the positioning mechanism includes: a fixed plate;

[0012] Both the left and right moving positions are provided with fixing plates on their outer sides, which are used to fix the left or right moving position.

[0013] According to the one-step injection stretch blow molding preform handle demolding structure of this utility model embodiment, during injection molding, demolding top blocks are embedded in both the left and right slides. The front end of the demolding top block abuts against the parting surface, so that the front end of the demolding top block abuts against the edge of the preform handle. After injection molding is completed, the left and right slides are separated to open the mold. The demolding top block is pushed outward under the action of the spring, and the force is applied to the plastic part of the handle, so that the handle is demolded, avoiding the preform being pulled apart during the mold opening process and improving the demolding speed of the handle.

[0014] 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

[0015] Figure 1 This is a cross-sectional view of the demolding structure of the handle of the one-step injection stretch blow molding preform according to an embodiment of the present invention;

[0016] Figure 2 This is a structural diagram of the demolding mechanism of the one-step injection stretch blow molding preform handle demolding structure according to an embodiment of the present invention;

[0017] Figure 3 This is a structural diagram of the demolding top block of the one-step injection stretch blow molding preform handle demolding structure according to an embodiment of the present invention.

[0018] The attached diagram is labeled as follows: 1 for left movement, 2 for right movement, 3 for pressure plate, 4 for demolding spring, 5 for demolding top block, 51 for cylindrical section, 52 for baffle, 53 for top plate, and 6 for fixing plate. Detailed Implementation

[0019] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, further illustrating the present invention.

[0020] like Figures 1-3 As shown in the figure, the one-step injection stretch blow molding preform handle demolding structure of this utility model is characterized by comprising: a sliding mechanism and a demolding mechanism;

[0021] The row positioning mechanism includes: left row position 1 and right row position 2;

[0022] The left slide 1 and the right slide 2 are arranged opposite to each other. The contact surface between the left slide 1 and the right slide 2 is a parting surface. Mounting holes are provided on both the left slide 1 and the right slide 2. The demolding mechanism is located in the mounting holes.

[0023] The demolding mechanism includes: a pressure plate 3, a demolding spring 4, and a demolding top block 5;

[0024] Both the left and right moving parts 1 and 2 are provided with pressure plates 3, and the pressure plates 3 are set with corresponding mounting holes. One end of the demolding spring 4 is connected to the pressure plate 3 and the other end is connected to the demolding top block 5. The front ends of the two demolding top blocks 5 abut against each other on the parting surface.

[0025] In this application, during injection molding, ejector blocks 5 are installed in both the left slide 1 and the right slide 2. The front end of the ejector block 5 pushes against the parting surface, so that the front end of the ejector block 5 pushes against the edge of the preform handle. After injection molding is completed, the mold is opened by separating the left slide 1 and the right slide 2. The ejector block 5 is pushed outward under the action of the spring, and the force is applied to the preform, so that the handle is demolded, avoiding the preform being pulled off during the mold opening process and improving the demolding speed of the handle.

[0026] like Figures 1-3 As shown, the demolding top block 5 includes: a cylindrical section 51, a baffle 52, and a top plate 53;

[0027] The mounting hole has a large diameter section and a small diameter section. The small diameter section is located on the side close to the parting surface. The baffle 52 is located in the large diameter section and at the connection between the large diameter section and the small diameter section. The demolding spring 4 is located in the large diameter section and is sleeved on the cylindrical section 51. The top plate 53 is located in the small diameter section.

[0028] The pressure plate 3 is fixed to the left moving position 1 or the right moving position 2 by bolts. The inner side of the pressure plate 3 is provided with a support block. The surface of the support block is an inclined surface, which is parallel to the surface of the baffle 52.

[0029] In this embodiment, the demolding spring 4 is fixed by a support block, so that the elastic force of the demolding spring 4 is directed toward the baffle 52, allowing the demolding spring 4 to smoothly push the baffle 52 to slide in the large diameter section. During the mold opening process, the demolding spring 4 pushes the baffle 52 to slide in the large diameter section, causing the top plate 53 to be ejected outward. By setting the mounting holes to large and small diameter sections, the baffle 52 slides in the large diameter section, limiting the sliding distance of the baffle 52, thereby limiting the distance of outward ejection.

[0030] like Figure 1 As shown, the positioning mechanism includes: a fixed plate 6;

[0031] A fixing plate 6 is provided on the outer side of both the left row position 1 and the right row position 2. The fixing plate 6 is used to fix the left row position 1 or the right row position 2.

[0032] In this embodiment, two fixing plates 6 are respectively provided on the outer sides of the left row position 1 and the right row position 2, and the left row position 1 and the right row position 2 are fixed by the fixing plates 6.

[0033] Above, refer to Figures 1-3This application describes a one-step injection stretch blow molding preform handle demolding structure according to an embodiment of the present invention. During injection molding, demolding ejector blocks 5 are installed in both the left slide 1 and the right slide 2. The front end of the demolding ejector block 5 abuts against the parting surface, so that the front end of the demolding ejector block 5 abuts against the edge of the preform handle. After injection molding is completed, the left slide 1 and the right slide 2 are separated to open the mold. The demolding ejector block 5 is pushed outward under the action of a spring, and the force is applied to the plastic part of the handle to complete the demolding of the handle. This avoids breaking the preform during the mold opening process and improves the demolding speed of the handle.

[0034] 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.

[0035] 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 preform handle demolding structure, characterized in that, include: Sliding mechanism and demolding mechanism; The row positioning mechanism includes: left row position and right row position; The left and right sliding positions are arranged opposite to each other, and the contact surface between the left and right sliding positions is a parting surface. Mounting holes are provided on both the left and right sliding positions, and the demolding mechanism is located in the mounting holes. The demolding mechanism includes: a pressure plate, a demolding spring, and a demolding top block; Pressure plates are provided on both the left and right moving parts, and the pressure plates are set with corresponding mounting holes. One end of the demolding spring is connected to the pressure plate and the other end is connected to the demolding top block. The front ends of the two demolding top blocks abut against each other on the parting surface.

2. The one-step injection stretch blow molding preform handle demolding structure as described in claim 1, characterized in that, The demolding block includes: a cylindrical section, a baffle, and a top plate; The mounting hole has a large diameter section and a small diameter section. The small diameter section is located on the side close to the parting surface. The baffle is located inside the large diameter section and at the connection between the large diameter section and the small diameter section. The demolding spring is located inside the large diameter section and sleeved on the cylindrical section. The top plate is located in the small diameter section.

3. The demolding structure for the handle of the one-step injection stretch blow molding preform as described in claim 2, characterized in that, The pressure plate is fixed to the left or right sliding position by bolts. The inner side of the pressure plate is provided with a support block. The surface of the support block is inclined and parallel to the surface of the baffle.

4. The demolding structure for the handle of a one-step injection stretch blow molding preform as described in claim 1, characterized in that, The positioning mechanism includes: a fixed plate; Both the left and right moving positions are provided with fixing plates on their outer sides, which are used to fix the left or right moving position.

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