Rotary bottle blowing machine

Abstract

The utility model relates to the technical field of bottle production lines, in particular to a rotary bottle blowing machine. The rotary bottle blowing machine is provided with a guide assembly, the guide assembly comprises a first guide plate and a second guide plate, the first guide plate is installed above the protective plate, the second guide plate is located above the transfer gear, the first guide plate and the second guide plate are arranged in a spaced mode to form a guide gap, and the part, above the supporting ring, of the bottle preform can be clamped in the guide gap. The upper portion of the bottle preform supporting ring is fixed in the guide gap, so that the single fixing mode of the bottle preform on the lower side of the supporting ring is changed into the double fixing mode of the upper side and the lower side of the supporting ring, the stability of the bottle preform in the transferring process is improved, and the bottle preform is prevented from shaking left and right; and the axial line of the bottle blank and the extending direction of the heating head are parallel to the rotating axial direction of the transfer assembly, so that the accuracy and success rate of inserting the heating head into the bottle blank are improved, and the bottle blank is prevented from being damaged.

Description

Technical Field

[0001] This utility model relates to the field of bottle production line technology, and in particular to a rotary blow molding machine. Background Technology

[0002] The main processes in blow molding to form bottles from preforms include preform preparation, heating, and blow molding. During this process, a radially compressible heating head is inserted into the preform at the insertion position. The heating head then deforms to form an interference fit with the preform, which is then transferred to the heating furnace by a robotic arm. With the development of market demand, the need for high-speed blow molding machines is increasing, and reliable and stable high-speed blow molding machines are highly favored by customers.

[0003] Current rotary blow molding machines typically use a combination of transfer gears and guard plates to transfer preforms before they enter the heating unit. The preforms are held between the teeth of the transfer gears and the guard plates. During transfer, the preforms are affected by centrifugal force, friction, and machine vibration, causing them to tilt and bounce to varying degrees, with the effect becoming more pronounced at higher speeds. This tilting and bouncing can cause the bottle neck to deviate from the transfer gears, resulting in misalignment during insertion, incomplete insertion, or overloaded insertion torque, which can easily damage the equipment. Therefore, there is an urgent need to develop a rotary blow molding machine to solve these problems. Utility Model Content

[0004] The purpose of this invention is to provide a rotary blow molding machine to solve the technical problem of preform instability during preform transfer in the prior art.

[0005] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0006] A rotary blow molding machine includes a transfer assembly, a drive assembly, and a heating head. The transfer assembly includes a transfer gear and a guard plate spaced apart from one side of the transfer gear. The drive assembly is driven by the transfer gear. A preform is located between the transfer gear and the guard plate and has a support ring. The lower end of the support ring abuts against the teeth of the transfer gear and the upper edge of the guard plate. The rotary blow molding machine also includes a guide assembly, which includes a first guide plate and a second guide plate. The first guide plate is mounted above the guard plate, and the second guide plate is located above the transfer gear. The first guide plate and the second guide plate are spaced apart to form a guide gap. The portion of the preform above the support ring can be engaged in the guide gap so that the axis of the preform is parallel to the rotation axis of the transfer assembly. The heating head is located above the guide gap and extends in a direction parallel to the rotation axis of the transfer assembly.

[0007] Optionally, the first guide plate includes a first mounting portion and a first guide portion, and the second guide plate includes a second mounting portion and a second guide portion. The first mounting portion is connected to the guard plate, the second mounting portion is connected to the first mounting portion, and the guide gap is formed between the first guide portion and the second guide portion.

[0008] Optionally, the first mounting portion is plate-shaped and recessed inward toward the side of the second guide plate to form a first arc-shaped plate, and the first arc-shaped plate forms the first guide portion toward the side of the second guide plate;

[0009] The second mounting portion is plate-shaped and protrudes towards the side of the first guide plate to form a second arc-shaped plate. The second arc-shaped plate forms a second guide portion towards the side of the first guide plate.

[0010] Optionally, at the inlet end of the guide gap, both the upper and lower sides of the first guide portion and the second guide portion are chamfered.

[0011] Optionally, the first guide portion and the first mounting portion are detachably connected, and the second guide portion and the second mounting portion are detachably connected.

[0012] Optionally, the inlet end of the guide gap is flared.

[0013] Optionally, the first guide plate is attached to the upper side of the protective plate, and one end of the first guide plate is detachably connected to the protective plate.

[0014] Optionally, the guide assembly further includes a connecting plate, one end of which is mounted on the upper side of the first guide plate and the other end of which is connected to the upper side of the second guide plate.

[0015] Optionally, one end of the connecting plate has an elongated hole extending radially along the transfer gear, and the first guide plate has a fixing hole. Fasteners pass through the elongated hole and the fixing hole to connect the first guide plate and the connecting plate.

[0016] Optionally, the first guide plate has an elongated hole extending radially along the transfer gear, and the guard plate has a fixing hole. Fasteners pass through the elongated hole and the fixing hole to connect the first guide plate and the guard plate.

[0017] The beneficial effects of this utility model are:

[0018] This utility model proposes a rotary blow molding machine. Based on the transfer gear and guard plate fixing the lower side of the preform support ring, a guide component is set to fix the upper part of the preform support ring in the guide gap. This changes the single fixing method of the preform from the lower side of the support ring to the double fixing of the upper and lower sides of the support ring, improving the stability of the preform during the transfer process and preventing the preform from swaying left and right. In addition, the extension direction of the preform axis and the heating head are parallel to the rotation axis of the transfer component, improving the accuracy of the heating head insertion into the preform, increasing the success rate of the heating head insertion into the preform, and avoiding damage to the preform. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a rotary blow molding machine provided in an embodiment of the present invention;

[0021] Figure 2 This is a top view of a rotary blow molding machine provided in an embodiment of this utility model;

[0022] Figure 3 yes Figure 2 Sectional view at point AA.

[0023] In the picture:

[0024] 1. Rotary blow molding machine;

[0025] 100. Preform; 1001. Support ring; 1002. Limiting ring;

[0026] 11. Guide assembly; 111. First guide plate; 1111. First mounting part; 1112. First guide part; 112. Second guide plate; 1121. Second mounting part; 1122. Second guide part; 113. Connecting plate; 114. Guide clearance; 115. Elongated hole;

[0027] 12. Transfer assembly; 121. Transfer gear; 122. Guard plate; 123. Guide plate;

[0028] 13. Driver components;

[0029] 14. Heating head;

[0030] 15. Support base. Detailed Implementation

[0031] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. In the description of this embodiment, unless otherwise specified, "multiple" specifically refers to two or more.

[0035] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0036] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or it can be located in between the component.

[0037] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0038] This embodiment proposes a rotary blow molding machine to solve the technical problem of preform instability during preform transfer in the prior art, thereby improving the technical effect of preform transfer stability.

[0039] like Figures 1 to 3 As shown, the rotary blow molding machine 1 includes a transfer assembly 12, a drive assembly 13, and a heating head 14. The transfer assembly 12 includes a transfer gear 121 and a guard plate 122 spaced apart from and surrounding one side of the transfer gear 121. The drive assembly 13 is connected to the transfer gear 121. A preform 100 is located between the transfer gear 121 and the guard plate 122 and has a support ring 1001. The lower end of the support ring 1001 abuts against the upper end of the teeth of the transfer gear 121 and the upper end of the edge of the guard plate 122. That is, the preform 100 is engaged and suspended between the transfer gear 121 and the guard plate 122, and the support ring 1001 restricts its vertical descent. When the preform 100 needs to be transferred, the drive assembly 13 is activated, driving the transfer gear 121 to rotate. The teeth of the transfer gear 121 push the preform 100 along the rotation direction of the transfer gear 121 until the preform 100 detaches from the transfer assembly 12. Furthermore, the rotary blow molding machine 1 also includes a guide assembly 11, which includes a first guide plate 111 and a second guide plate 112. The first guide plate 111 is mounted above the guard plate 122, and the second guide plate 112 is located above the transfer gear 121. The first guide plate 111 and the second guide plate 112 are spaced apart to form a guide gap 114. The portion of the preform 100 above the support ring 1001 can be engaged in the guide gap 114 so that the axis of the preform 100 is parallel to the rotation axis of the transfer assembly 12. The heating head 14 is located above the guide gap 114 and extends in a direction parallel to the rotation axis of the transfer assembly 12. Understandably, during the transfer process, the portion of the preform 100 below the support ring 1001 is engaged between the transfer gear 121 and the guard plate 122, while the portion of the preform 100 above the support ring 1001 is engaged in the guide gap 114. That is, both the upper and lower sides of the support ring 1001 of the preform 100 are effectively fixed, making it difficult for the preform 100 to tilt or swing. Furthermore, the first guide plate 111 is installed above the guard plate 122, and the second guide plate 112 is located above the transfer gear 121, making the axis of the preform 100 parallel to the rotation axis of the transfer assembly 12. At the same time, the extension direction of the heating head 14 is also parallel to the rotation axis of the transfer assembly 12, making the alignment of the preform 100 and the heating head 14 more accurate. When the heating head 14 is inserted downward into the preform 100, it can be aligned more precisely with the bottle mouth of the preform 100, reducing the difficulty of inserting the heating head 14.

[0040] In this embodiment, a rotary blow molding machine 1, based on the transfer gear 121 and the guard plate 122 fixing the lower side of the preform 100 support ring 1001, is further improved by setting a guide component 11 to fix the upper part of the preform 100 support ring 1001 in the guide gap 114. This changes the single fixing method of the preform 100 from the lower side of the support ring 1001 to a double fixing method on both the upper and lower sides of the support ring 1001, improving the stability of the preform 100 during the transfer process and preventing the preform 100 from swaying left and right. In addition, the axis of the preform 100 and the extension direction of the heating head 14 are parallel to the rotation axis of the transfer component 12, improving the accuracy of the heating head 14 in inserting into the preform 100, reducing the difficulty of inserting the heating head 14 into the preform 100, increasing the success rate of inserting the heating head 14 into the bottle mouth of the preform 100, and avoiding damage to the preform 100.

[0041] For example, the transfer assembly 12 also includes a guide plate 123. Along the rotation direction of the transfer gear 121, the guide plate 123 is located upstream of the guide assembly 11, with one end rotatably connected to the guard plate 122 and the other end able to approach or move away from the transfer gear 121. By providing the guide plate 123, the guide plate 123 can be selectively rotated as needed to guide the preform 100 into the transfer assembly 12 or into other processes, increasing the selectivity of processes and improving the rationality of the overall structure.

[0042] Optionally, the first guide plate 111 includes a first mounting portion 1111 and a first guide portion 1112, and the second guide plate 112 includes a second mounting portion 1121 and a second guide portion 1122. The first mounting portion 1111 is connected to the guard plate 122, the second mounting portion 1121 is connected to the first mounting portion 1111, and a guide gap 114 is formed between the first guide portion 1112 and the second guide portion 1122. Understandably, the first guide plate 111 is connected to the guard plate 122 through the first mounting part 1111, and the second mounting part 1121 of the second guide plate 112 is connected to the first mounting part 1111. That is, both the first guide plate 111 and the second guide plate 112 are mounted on the guard plate 122 through the first mounting part 1111, which avoids interference between the second mounting part 1121 and the transfer gear 121. When the preform 100 enters the guide gap 114, the first guide part 1112 and the second guide part 1122 guide and limit the upper part of the preform 100 support ring 1001.

[0043] For example, the first mounting portion 1111 is plate-shaped, and its side facing the second guide plate 112 is recessed to form a first arc-shaped plate, which forms a first guide portion 1112 on the side facing the second guide plate 112; the second mounting portion 1121 is plate-shaped, and its side facing the first guide plate 111 protrudes to form a second arc-shaped plate, which forms a second guide portion 1122 on the side facing the first guide plate 111. The plate-shaped arrangement ensures the structural strength of the first guide plate 111 and the second guide plate 112, and saves space occupied by the guide assembly 11 in the vertical direction. Furthermore, the arc-shaped plate arrangement makes the shape of the guide gap 114 consistent with the movement trajectory of the preform 100 between the transfer gear 121 and the guard plate 122, improving the structural rationality and the smoothness of the preform 100 during transfer.

[0044] During operation, the first guide portion 1112 and the second guide portion 1122 will frequently rub against the preform 100. For example, the first guide portion 1112 and the first mounting portion 1111 are detachably connected, and the second guide portion 1122 and the second mounting portion 1121 are detachably connected. This arrangement facilitates timely replacement of the first guide portion 1112 and the second guide portion 1122 when they are worn, thereby improving the reliability of the rotary blow molding machine 1.

[0045] Optionally, a locking pin is provided on both the first guide portion 1112 and the second guide portion 1122, and a locking hole is provided on both the first mounting portion 1111 and the second mounting portion 1121, with the locking pin cooperating with the locking hole.

[0046] For example, the inlet end of the guide gap 114 is flared. This configuration reduces the difficulty for the preform 100 to enter the guide gap 114, thereby improving the working efficiency of the rotary blow molding machine 1.

[0047] Optionally, at the entrance end of the guide gap 114, both the upper and lower sides of the first guide portion 1112 are chamfered, and both the upper and lower sides of the second guide portion 1122 are also chamfered. This arrangement makes it easier for the first guide portion 1112 and the second guide portion 1122 to enter above the support ring 1001, making it easier to fix the portion of the preform 100 above the support ring 1001, thus improving the fixation success rate. It also improves the smoothness of the movement of the preform 100 in the guide gap 114.

[0048] Optionally, the first guide plate 111 is attached to the upper side of the protective plate 122, and one end of the first guide plate 111 is detachably connected to the protective plate 122. This arrangement improves the compactness and stability of the rotary blow molding machine 1, while also facilitating the inspection and replacement of the first guide plate 111.

[0049] For example, the guide assembly 11 further includes a connecting plate 113, one end of which is mounted on the upper side of the first guide plate 111, and the other end is connected to the upper side of the second guide plate 112. This arrangement enhances the detachability of the guide assembly 11, facilitating timely replacement of either the first guide plate 111 or the second guide plate 112 in case of damage, thereby improving the reliability of the rotary blow molding machine 1.

[0050] Optionally, one end of the connecting plate 113 has an elongated hole 115 extending radially along the transfer gear 121, and the first guide plate 111 has a fixing hole. Fasteners pass through the elongated hole 115 and the fixing hole to connect the first guide plate 111 and the connecting plate 113. This arrangement allows the mating position of the fixing hole and the elongated hole 115 to be changed by moving the connecting plate 113, thereby adjusting the distance between the first guide plate 111 and the second guide plate 112, and thus changing the width of the guide gap 114, improving the adaptability of the rotary blow molding machine 1 to preforms 100 of different sizes.

[0051] For example, the first guide plate 111 has an elongated hole 115 extending radially along the transfer gear 121, and the guard plate 122 has a fixing hole. Fasteners pass through the elongated hole 115 and the fixing hole to connect the first guide plate 111 and the guard plate 122. This arrangement allows the mating position of the fixing hole and the elongated hole 115 to be changed by moving the first guide plate 111, thereby changing the installation position of the first guide plate 111 on the guard plate 122, and further changing the position of the guide gap 114, aligning it vertically with the gap between the transfer gear 121 and the guard plate 122, keeping the axis of the preform 100 vertical, and improving the accuracy of the heating head 14 when inserting into the preform 100.

[0052] Optionally, the connecting plate 113 is inverted U-shaped, with its two legs perpendicularly connected to the upper ends of the first guide plate 111 and the second guide plate 112, respectively. This arrangement allows the portion of the preform 100 above the support ring 1001 to pass between the two legs of the U-shaped plate, avoiding interference with the preform 100. This reduces the thickness of the first guide plate 111 and the second guide plate 112, improves the overall structural rationality, and lowers the overall weight of the rotary blow molding machine 1.

[0053] For example, a limiting ring 1002 is provided around the preform 100 in its circumference. The limiting ring 1002 is spaced above the support ring 1001. When the preform 100 enters the guide gap 114, the first guide portion 1112 and the second guide portion 1122 are located between the limiting ring 1002 and the support ring 1001. The upper and lower sides of the first guide portion 1112 and the second guide portion 1122 are chamfered, which makes it easier for the first guide portion 1112 and the second guide portion 1122 to enter the area between the limiting ring 1002 and the support ring 1001, thereby improving the positioning accuracy of the guide gap 114 for the preform 100. The setting of the limiting ring 1002 also allows the lower end of the limiting ring 1002 of the preform 100 to abut against the upper end of the first guide portion 1112 and the second guide portion 1122 when the support ring 1001 falls off or is damaged, thereby preventing the preform 100 from falling and improving the safety of the rotary blow molding machine 1.

[0054] Optionally, the rotary blow molding machine 1 also includes a support base 15, on which the transfer assembly 12 is mounted. The support base 15 provides an installation position for the transfer assembly 12, improving the structural rationality and installation stability.

[0055] In this embodiment, the working process of the rotary blow molding machine 1 is as follows:

[0056] When the rotary blow molding machine 1 starts working, the drive assembly 13 drives the transfer gear 121 to rotate. The preform 100 below the support ring 1001 is engaged between the transfer gear 121 and the guard plate 122. The teeth of the transfer gear 121 push the preform 100 to move between the transfer gear 121 and the guard plate 122 in the rotation direction of the transfer gear 121. The preform 100 gradually enters the guide gap 114. At this time, the first guide part 1112 and the second guide part 1122 hold the part of the preform 100 above the support ring 1001 to ensure that the axis of the preform 100 is parallel to the rotation axis of the transfer assembly 12. At this time, the heating head 14 is inserted into the preform 100 from above. The preform 100 continues to move until it is disengaged from the guide assembly 11. Finally, the heating head 14, under the action of the robotic arm, forks the preform 100 away from the guide assembly 11 and transports it to the heating furnace.

[0057] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A rotary blow molding machine, comprising a transfer assembly (12), a drive assembly (13), and a heating head (14), wherein the transfer assembly (12) includes a transfer gear (121) and a guard plate (122) arranged around one side of the transfer gear (121) and spaced apart from the transfer gear (121), the drive assembly (13) is connected to the transfer gear (121) in a transmission connection, a preform (100) is located between the transfer gear (121) and the guard plate (122) and has a support ring (1001), the lower end of the support ring (1001) abutting against the teeth of the transfer gear (121) and the upper edge of the guard plate (122), characterized in that, The rotary blow molding machine further includes a guide assembly (11), which includes a first guide plate (111) and a second guide plate (112). The first guide plate (111) is mounted above the guard plate (122), and the second guide plate (112) is located above the transfer gear (121). The first guide plate (111) and the second guide plate (112) are spaced apart to form a guide gap (114). The portion of the preform (100) above the support ring (1001) can be engaged in the guide gap (114) so ​​that the axis of the preform (100) is parallel to the rotation axis of the transfer assembly (12). The heating head (14) is located above the guide gap (114) and extends in a direction parallel to the rotation axis of the transfer assembly (12).

2. The rotary blow molding machine according to claim 1, characterized in that, The first guide plate (111) includes a first mounting portion (1111) and a first guide portion (1112), and the second guide plate (112) includes a second mounting portion (1121) and a second guide portion (1122). The first mounting portion (1111) is connected to the guard plate (122), and the second mounting portion (1121) is connected to the first mounting portion (1111). The guide gap (114) is formed between the first guide portion (1112) and the second guide portion (1122).

3. The rotary blow molding machine according to claim 2, characterized in that, The first mounting portion (1111) is plate-shaped, and a first arc-shaped plate is formed by recessing the side facing the second guide plate (112). The first guide portion (1112) is formed on the side facing the second guide plate (112). The second mounting portion (1121) is plate-shaped and protrudes towards the side of the first guide plate (111) to form a second arc-shaped plate. The second arc-shaped plate forms a second guide portion (1122) towards the side of the first guide plate (111).

4. The rotary blow molding machine according to claim 3, characterized in that, At the entrance end of the guide gap (114), both the upper and lower sides of the first guide portion (1112) and the second guide portion (1122) are chamfered.

5. The rotary blow molding machine according to claim 2, characterized in that, The first guide portion (1112) and the first mounting portion (1111) are detachably connected, and the second guide portion (1122) and the second mounting portion (1121) are detachably connected.

6. The rotary blow molding machine according to claim 1, characterized in that, The inlet end of the guide gap (114) is flared.

7. The rotary blow molding machine according to claim 1, characterized in that, The first guide plate (111) is attached to the upper side of the guard plate (122), and one end of the first guide plate (111) is detachably connected to the guard plate (122).

8. The rotary blow molding machine according to claim 1, characterized in that, The guide assembly (11) further includes a connecting plate (113), one end of which is mounted on the upper side of the first guide plate (111), and the other end is connected to the upper side of the second guide plate (112).

9. The rotary blow molding machine according to claim 8, characterized in that, One end of the connecting plate (113) has an elongated hole (115) extending radially along the transfer gear (121), and the first guide plate (111) has a fixing hole. Fasteners pass through the elongated hole (115) and the fixing hole to connect the first guide plate (111) and the connecting plate (113).

10. The rotary blow molding machine according to claim 8, characterized in that, The first guide plate (111) has an elongated hole (115) extending radially along the transfer gear (121), and the guard plate (122) has a fixing hole. Fasteners pass through the elongated hole (115) and the fixing hole to connect the first guide plate (111) and the guard plate (122).

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