Device for transporting plastic parisons and arrangement for treating plastic containers
By designing a transportation element with adjustable gaps and a downward pressure device for intermittent motion in the equipment for transporting plastic parisons, the fault problems caused by misalignment and pivoting during the transportation of plastic parisons are solved, and automatic troubleshooting and stable transportation are achieved.
Patent Information
- Application Number
- CN202420749250.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2023-04-18
- Filing Date
- 2024-04-11
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-04-11
AI Technical Summary
During the transportation of plastic parisons, the plastic parison may not be completely evenly placed on the track due to the large transportation speed, resulting in misalignment or pivoting, which will lead to transportation failures. The existing technology has not effectively solved the troubleshooting problems in the outlet or outlet accessories of the drum sorter.
An apparatus is designed that includes first and second transport elements to form a gap so that the substrate of the plastic parison can pass through but cannot pass through the support ring and/or threads. A downward pressing device is provided above the device, including a first downward pressing element that can move in the longitudinal direction and a second downward pressing element, which intermittently causes movement of the first downward pressing element to automatically troubleshoot.
Through this design, automatic troubleshooting during transportation is achieved, stable transportation of plastic parison is ensured, and the need for manual intervention is avoided.
Smart Images
Figure CN222610403U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a device and a method for transporting plastic preforms. Background Art
[0002] It is known from the prior art that plastic preforms are first heated and then formed into plastic containers using a forming device, such as a stretch blow molding machine. For this purpose, it is necessary, for example, to separate the plastic containers from a chute and transport them in an orderly manner. For this purpose, so-called drum sorters are used, for example, which have two rotatable drums between which the plastic preforms are transported. In addition, however, transport rails for transporting plastic preforms are also known.
[0003] Plastic preforms are usually transported between two rails, wherein the support ring of the plastic preform is supported on these rails and the base body of the plastic preform protrudes through these rails. In particular, at high transport speeds, the plastic preforms do not lie completely evenly on the rails, but may be misaligned or pivoted. This can lead to transport faults.
[0004] For this purpose, it is also known from the prior art to guide the plastic preforms by means of a hold-down element which is usually arranged above the plastic preforms. Occasionally, faults may occur in this area. However, the prior art does not disclose troubleshooting, in particular in the outlet or outlet fittings of a drum sorter. If a plastic preform is wedged in the area of this fitting, it must be loosened manually.
[0005] In view of this, the object of the present invention is in particular to realize fault elimination in such transport devices. Utility Model Content
[0006] According to the invention, this object is achieved by the subject matter of the independent patent claim. Advantageous embodiments and improvements are the subject matter of the dependent claims.
[0007] The device for transporting plastic preforms of the utility model has a first transport element, in particular a first transport track, which extends along the transport path of the plastic preforms. In addition, the device has a second transport element, in particular a second transport track, which is parallel to the first transport element, wherein the first transport element and the second transport element are spaced apart from each other so that a gap is formed between the first transport element and the second transport element so that the base of the plastic preform can pass through the gap, but the supporting ring and / or the thread of the plastic preform cannot pass through the gap.
[0008] The device also has a hold-down device which is arranged above the transport element and / or above the mouth of the plastic preform.
[0009] According to the invention, the pressing device has a first pressing element movable in two opposite directions in the longitudinal direction of the plastic parison, and a drive device suitable for causing the above movement at least intermittently during the transport operation of the device.
[0010] Particularly preferably, this first hold-down element also extends in the transport direction of the plastic preforms. Particularly preferably, this first hold-down element extends parallel to the aforementioned transport element.
[0011] In a particularly preferred embodiment, the transport element is also adjustable in height direction and in particular in the longitudinal direction of the plastic preforms to be transported. However, particularly preferably, this adjustment is not carried out during the operating operation of the device.
[0012] Preferably, the gaps formed between the transport elements are variable and / or the lateral spacing between the transport elements is variable.
[0013] In another advantageous embodiment, the drive device is suitable and serves to cause a periodic movement of the first hold-down element and / or to cause a circular movement of the first hold-down element, wherein in this case the plane of this circular movement is particularly preferably oriented vertically. Particularly preferably, this plane of the circular movement is oriented in the transport direction of the plastic preforms or parallel to this transport direction.
[0014] The drive device is preferably an electric motor, in particular an engine with a rotary drive.
[0015] In a further advantageous embodiment, the drive has an eccentric element and / or a connecting rod drive.
[0016] In another advantageous embodiment, the drive device has a second holddown element and the first holddown element is arranged movably relative to the second holddown element. Preferably, the second holddown element is arranged movably relative to the first holddown element (at least likewise) in a vertical and / or vertical direction.
[0017] In a further advantageous embodiment, the second holddown element is arranged stationary. In particular, the second holddown element is arranged stationary relative to the transport element.
[0018] In a preferred embodiment, the second hold-down element has at least one contact surface which is suitable and used for contacting a section of the plastic preform. Preferably, this contact surface extends at least partially along the transport path of the plastic preform.
[0019] In a preferred embodiment, the second hold-down element has a second contact surface which is suitable and used for contacting a section of the plastic preform. Preferably, the second contact surface extends at least partially along the transport path of the plastic preform.
[0020] In a preferred embodiment, the first and second contact surfaces of the second pressing element are spaced apart from each other.
[0021] Preferably, the two contact surfaces of the second hold-down element extend obliquely relative to the transport plane of the plastic preforms and / or obliquely relative to a support plane formed by the two transport elements.
[0022] Preferably, the contact surface of the first holddown element is arranged between at least two contact surfaces of the second holddown element.
[0023] Therefore, preferably, in the pressing piece or pressing device, another pressing element is added, particularly as a supplement to the static (i.e. second) pressing element. This second pressing element preferably carries out periodic motion and / or circular motion particularly in the motion direction of the plastic preform.
[0024] Preferably, the contact surface and / or contact area of the second pressing element (that is, the contact surface and / or contact area that intermittently contacts or is suitable for contacting the plastic preform) is intermittently or partially above the contact surface of the first pressing element, and intermittently or partially below the contact surface of the first pressing element.
[0025] Therefore, the second hold-down element particularly preferably forms a contact surface for contacting the mouth of the plastic preform and in particular the edge of the mouth. Particularly preferably, the first hold-down element also forms such a contact surface that can contact the plastic preform or its mouth. As described above, this contact surface of the second hold-down element is partially above the contact surface of the second hold-down element and intermittently below the contact surface of the second hold-down element.
[0026] The height interval of the first pressing element and the second pressing element is thus changed. If the plastic preform is wedged into the second pressing element, this wedging can be released by pressing the plastic preform down with the first pressing element.
[0027] This makes it possible to achieve automatic error elimination in these accessories, in particular in the transport device described here.
[0028] In another advantageous embodiment, the second hold-down element has a groove, and the first hold-down element is (particularly movably) arranged in this groove. The second hold-down element can form a gap, and the first hold-down element is arranged and / or movably arranged in the groove.
[0029] In a further advantageous embodiment, the first transport element and / or the second transport element is designed as a transport track. Particularly preferably, both transport elements are designed as transport tracks.
[0030] Particularly preferably, the gap through which the base body of the plastic preform can pass expands downwards below the surface of the respective support element. This allows for a more stable and trouble-free transport of the plastic preform. Particularly preferably, the gap expands downwards, in particular in a conical or truncated cone shape.
[0031] In another preferred embodiment, the first pressing element performs a stroke in at least one section, in particular the end section and / or the section in contact with the plastic preform, which is greater than 0.1 cm, preferably greater than 0.2 cm, preferably greater than 0.3 cm, preferably greater than 0.4 cm, preferably greater than 0.5 cm, preferably greater than 0.6 cm, and particularly preferably greater than 0.7 cm.
[0032] In another preferred embodiment, the first pressing element performs a stroke in at least one section, in particular the end section and / or the section in contact with the plastic preform, which is less than 10 cm, preferably less than 8 cm, preferably less than 6 cm, preferably less than 5 cm, preferably less than 4 cm, preferably less than 3 cm, and particularly preferably less than 2 cm.
[0033] Practice has shown that travel within this range is very suitable for reliably correcting any faults that occur.
[0034] In another advantageous embodiment, the transport device has another transport unit for transporting plastic preforms, wherein the transport unit preferably has a first transport roller rotatable about a first rotation axis and a second transport roller rotatable about a second rotation axis, and preferably a gap is formed between the first transport roller and the second transport roller, through which the base body of the plastic preform passes or can pass, but the support ring of the plastic preform cannot pass.
[0035] What is preferably involved here is a so-called drum sorter, which is preferably arranged upstream of the above-mentioned device. Therefore, preferably, the transport unit mentioned is arranged upstream of the above-mentioned transport element.
[0036] The utility model also relates to a configuration for processing plastic containers, the configuration having a device of the type described above and a device for heating plastic preforms, the device for heating being preferably arranged downstream of the device described above in a transport device for the plastic preforms.
[0037] The utility model also relates to a method for transporting plastic preforms, wherein the plastic preforms are transported and / or conveyed along a first transport element extending along a transport path of the plastic preforms and along a second transport element also extending parallel to the first transport element, wherein the first transport element and the second transport element are spaced apart from each other in such a way that a gap is formed between the first transport element and the second transport element so that the base body of the plastic preform can pass through the gap, but the supporting ring and / or the thread of the plastic preform cannot pass through the gap and / or are blocked by the transport element.
[0038] The device further comprises a pressing device, which is arranged above the transport element and / or above the mouth of the plastic preform, and the pressing device at least intermittently contacts and / or guides the plastic preform.
[0039] According to the invention, the hold-down device has a hold-down element which is movable in two opposite directions in the longitudinal direction of the plastic preform, and has a drive device which causes the above-mentioned movement during the transport operation of the device.
[0040] In terms of the method, it is therefore proposed that a movable pressing element, in particular a periodically movable pressing element, is provided for eliminating faults.
[0041] Wherein, this pressing element can move continuously during the operation of the device and / or during the transportation of the plastic preform.But it can also only be triggered when a fault is detected and / or found, such as when the plastic preform is stuck.
[0042] Particularly preferably, the pressing element moves periodically. Preferably, the pressing element moves in a circular motion.
[0043] Particularly preferably, the plastic preforms are transported in a linear direction.
[0044] Particularly preferably, the hold-down element is moved by an eccentric drive or an eccentric drive.
[0045] In a further preferred embodiment, the plastic preforms are also transported or guided by a second hold-down element, wherein this second hold-down element is preferably arranged stationary relative to the transport path of the plastic preforms. BRIEF DESCRIPTION OF THE DRAWINGS
[0046] Further advantages and embodiments can be seen from the accompanying drawings:
[0047] in:
[0048] Figure 1 A view of the device of the present invention; and
[0049] Figure 2 A view of the device and a drum sorter arranged upstream. DETAILED DESCRIPTION
[0050] Figure 1 A view of a transport device of the present invention is shown. A first transport element 2 in the form of a first transport track and a second transport element 4 in the form of a second transport track are provided. Plastic preforms 10 are transported between the two transport elements 2, 4. The base body 10a of the plastic preform can pass through the gap formed between the transport elements 2, 4, but the support ring 10b of the plastic preform cannot pass through.
[0051] Reference numeral 6 denotes a hold-down device as a whole, which guides the plastic preforms during their movement or during their transport.
[0052] The pressing device 6 has a first pressing element 62, which is designed to be movable. The pressing device 6 also has a second pressing element 64, which is arranged immovably or fixedly. Preferably, the first pressing element 62 and the second pressing element 64 both form contact surfaces, which are suitable and used for contacting with the plastic preform or its mouth.
[0053] The first holddown element is guided in a recess of the second holddown element 64 or is arranged in the recess.
[0054] In a preferred embodiment, the contact surface of the first hold-down element is parallel to the mouth region of the plastic preform, more precisely to the mouth region of the plastic preform transported in the nominal position.
[0055] Preferably, the contact surface of the first hold-down element extends in a plane parallel to a support plane formed by the transport elements 2 , 4 , in which the plastic preforms are transported and / or in which a support ring supporting the plastic preforms is supported.
[0056] Preferably, the contact surface of the second pressing element 64 is inclined. Particularly preferably, the second pressing element has two contact surfaces, between which the plastic preform 10 is guided. Preferably, these contact surfaces extend upward toward each other in the longitudinal direction of the plastic preform.
[0057] Preferably, at least one contact surface of the second hold-down element extends in a plane which is inclined relative to a support plane formed by the transport elements 2 , 4 in which the plastic preforms are transported and / or in which a support ring which supports the plastic preforms is supported.
[0058] Reference numeral 68 denotes a drive device which, via a connecting rod 72 , moves the first pressing element 62 in a direction H. As already mentioned above, this is a periodic movement caused by the drive device 68 , which is in particular an electric motor.
[0059] Reference numeral 82 denotes a support on which the transport element 2 is arranged. This also allows the height position of the transport element 2 to be changed.
[0060] A further support for holding the transport element 4 is provided on the rear side of the device.
[0061] Figure 2 A further view of the transport device 1 according to the invention is shown. Here too, an optional transport unit 20 is provided, which is preferably arranged upstream.
[0062] Particularly preferably, this transport unit 20 has a rotatable first roller 22 and a rotatable second roller 24. The plastic preforms are transported between these two rollers 22, 24, whereby an alignment is also preferably achieved.
[0063] Preferably, the transport element 2 extends in the direction of the first rotatable roller. Preferably, the transport element 4 extends in the direction of the second rotatable roller.
[0064] In another preferred embodiment, the interval between the rotatable first roller 22 and the rotatable second roller 24 is just equal to the interval between the first transport element 2 and the second transport element 4 .
[0065] The device 1 preferably transfers the plastic preforms to a single-cycle device, such as a single-cycle star, which preferably in turn conveys the plastic preforms to a heating device in order to heat them.
[0066] The applicant reserves the right to claim all features disclosed in the application documents that are essential to the utility model, as long as these features are novel compared to the prior art individually or in combination. Further, it is to be noted that features that can be advantageous in themselves are also described in individual drawings. A person skilled in the art will immediately recognize that a certain feature described in a drawing can be advantageous even without using other features in the drawing. In addition, a person skilled in the art will recognize that advantages can also be obtained by combining several features shown in a single drawing or in different drawings.
Claims
1. A device (1) for transporting plastic preforms (10), comprising a first transport element (2) extending along a transport path (P) of the plastic preforms (10), and a second transport element (4) extending parallel to the first transport element (2), wherein the first transport element (2) and the second transport element (4) are spaced apart from each other in such a way that a gap (S) is formed between the first transport element (2) and the second transport element (4) in such a way that a base body (10a) of the plastic preform (10) can pass through the gap (S), but a supporting ring (10b) of the plastic preform (10) cannot pass through the gap, wherein the device further comprises a pressing device (6), which is arranged above the transport elements (2, 4) and / or above the mouth of the plastic preform (10), It is characterized in that The hold-down device (6) has a first hold-down element (62) which is movable in two opposite directions in the longitudinal direction of the plastic preform and has a drive device (68) which is suitable and intended to cause the movement during the transport operation of the device.
2. The device (1) according to claim 1, It is characterized in that The driving device (68) is suitable for and used to cause a periodic movement of the first pressing element (62), and / or the driving device (68) is suitable for and used to cause a circular movement of the first pressing element (62).
3. The device (1) according to claim 1, It is characterized in that The device (1) has a second pressing element (64), and the first pressing element (62) is arranged movably relative to the second pressing element (64).
4. The device (1) according to claim 3, It is characterized in that The second hold-down element (64) is arranged stationary.
5. The device (1) according to claim 3, It is characterized in that The second pressing member (64) has a groove, and the first pressing member is arranged in the groove.
6. The device (1) according to claim 1, It is characterized in that The first transport element (2) and / or the second transport element (4) is designed as a transport track.
7. The device (1) according to claim 3, It is characterized in that The first pressing element (62) performs a stroke relative to the second pressing element (64), the stroke being greater than 0.1 cm, and / or the first pressing element (62) performs a stroke relative to the second pressing element (64), the stroke being less than 10 cm.
8. The device (1) according to claim 1, It is characterized in that The device comprises a transport unit (20) for transporting the plastic preforms, wherein the transport unit (20) comprises a first transport roller (22) rotatable about a first rotation axis and a second transport roller (24) rotatable about a second rotation axis.
9. An arrangement for handling plastic containers, characterized in that The arrangement comprises a device according to at least one of the preceding claims and a device for heating plastic preforms, which is arranged downstream of the device (1) in the transport direction of the plastic preforms.