Pressing and holding mechanism for injection molding of plastic bags and suitcases

Abstract

The utility model discloses a hold-down mechanism for injection molding of plastic bags and suitcases, and relates to the technical field of injection molding processing of plastic bags and suitcases. The pressing and holding mechanism for injection molding of the plastic bags and suitcases comprises a connecting plate, extrusion mechanisms are fixedly connected to the periphery of the upper surface of the connecting plate, and local pressurizing mechanisms are fixedly connected to the upper surfaces of the extrusion mechanisms. By means of the local pressurizing mechanism, when a plastic bag is pressed and held, the pressing and holding plate is used for integrally pressing and holding the plastic bag, on the basis of overall pressing and holding, if larger pressing and holding force is needed in some areas, local pressing and holding can help to optimize flowing of plastic in a mold, the problem of uneven filling is avoided, and the production efficiency is improved. The thickness and the size of a formed part are controlled more accurately, extra pressure can be applied to a specific area through local pressing, the defects such as possible bubbles and shrinkage cavities can be eliminated easily, and especially in the forming process of complex shapes and thin-wall structures, the local quality problem can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to plastic suitcase injection molding processing technical field, concretely is a kind of plastic suitcase injection molding with hold-down mechanism. BACKGROUND

[0002] Plastic suitcase is widely welcomed due to its durability and lightness, they are usually made of polypropylene, polyvinyl chloride (PVC) or other types of plastic, suitable for travel, storage and carrying goods, the injection molding process of plastic suitcase is a common production method, mainly involves heating plastic material to a molten state, then injecting into a mold for molding, during the injection molding process of plastic suitcase, the hold-down mechanism plays a key role, mainly to ensure that the mold can maintain closed state during injection molding, to avoid plastic melt leakage, and ensure the quality of the molded product.

[0003] The existing hold-down mechanism, most of the whole plastic suitcase is held, but if local bulging occurs in the hold-down of plastic suitcase, the local plastic suitcase needs to be held again, but the height of the hold-down mechanism is different after being taken down, which affects the overall quality of the plastic suitcase, and may cause uneven local stress of the mold, thereby causing warping, cracking or incomplete filling and other problems, which is not convenient for local hold-down on the basis of overall hold-down.

[0004] Therefore, the utility model provides a kind of plastic suitcase injection molding with hold-down mechanism to solve the above problems. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the utility model provides a kind of plastic suitcase injection molding with hold-down mechanism, to solve the problems raised in the above background art.

[0006] To achieve the above object, the utility model is realized by the following technical scheme: a kind of plastic suitcase injection molding with hold-down mechanism, including connecting plate, the upper surface of the connecting plate is uniformly fixedly connected with extrusion mechanism, the upper surface of the extrusion mechanism is fixedly connected with local pressure mechanism, the upper surface of the local pressure mechanism is fixedly connected with support mechanism on both sides, the bottom of the connecting plate is fixedly connected with heating mechanism;

[0007] The local pressure mechanism includes vacuum suction plate, the bottom of the vacuum suction plate is provided with track groove, the inside of the track groove is provided with vacuum suction hole, the inside of the track groove is slidably connected with sliding block, the bottom of the sliding block is fixedly connected with A electric push rod, the bottom of the A electric push rod is fixedly connected with A extrusion disc, the bottom of the A extrusion disc is fixedly connected with A spring, the bottom of the A spring is fixedly connected with B extrusion disc, the inside of the A spring is inserted with A vertical rod, the both sides of the upper surface of the vacuum suction plate are fixedly connected with air pump.

[0008] The further improvement of the utility model technical scheme lies in: the extrusion mechanism includes an extrusion rod, the bottom of the extrusion rod is fixedly connected to the upper surface of the connecting plate, a sleeve is sleeved on the outer surface of the extrusion rod, and a B spring is fixedly connected in the inside of the sleeve.

[0009] The further improvement of the utility model technical scheme lies in: the supporting mechanism includes a B electric push rod, one end of the B electric push rod is fixedly connected to the upper surface of the vacuum suction plate, the other end of the B electric push rod is fixedly connected with a supporting rod, supports are fixedly connected to the two sides of the supporting rod, auxiliary rods are fixedly connected to the two ends of the bottom of the support, the inner side walls of the auxiliary rods are connected through connecting rods, and sleeve rods are sleeved on the outer surfaces of the auxiliary rods.

[0010] The further improvement of the utility model technical scheme lies in: a sliding groove is formed in one side of the sleeve rod, the inside of the sliding groove is slidably connected to the outer surface of the connecting rod, a hole groove is formed in the surface of the sleeve rod, a plug-in rod is inserted into the inside of the hole groove, and a bearing block is fixedly connected to the bottom of the sleeve rod.

[0011] The further improvement of the utility model technical scheme lies in: the heating mechanism includes a C spring, the upper surface of the C spring is fixedly connected to the bottom of the connecting plate, and a pressing plate is fixedly connected to one end of the C spring.

[0012] The further improvement of the utility model technical scheme lies in: a square recess is formed in the bottom of the pressing plate, a heating plate is fixedly connected in the inside of the square recess, a backing plate is fixedly connected to the bottom of the heating plate, and a B vertical rod is inserted into the inside of the C spring.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] 1. When the local pressure mechanism is arranged, the plastic box and bag are pressed and held as a whole by the pressing plate, and if greater pressing force is required in some areas, local pressing can help to optimize the flow of plastic in the mold, avoid uneven filling, make the thickness and size control of the formed part more accurate, and local pressing can apply additional pressure to specific areas, which helps to eliminate possible bubbles, shrinkage holes and other defects, especially in the molding of complex shapes and thin-walled structures, which can avoid local quality problems.

[0015] 2. Through the heating mechanism, during the injection molding of plastic bags, the heating mechanism can ensure that the mold temperature is maintained at an appropriate level, thereby reducing the cooling time of the plastic in the mold, accelerating production efficiency, and improving the fluidity of the molten plastic by increasing the mold temperature, allowing it to better fill the complex shape of the mold. In addition, by maintaining the mold temperature through the heating mechanism, molding defects caused by uneven temperature, such as warping, cracking, and shrinkage, can be reduced, ensuring the dimensional and appearance quality of the molded products, thereby improving production quality. Attached Figure Description

[0016] Figure 1 A schematic diagram of the compression holding mechanism used for injection molding of plastic bags;

[0017] Figure 2 A schematic diagram of the sleeve in the compression holding mechanism for injection molding of plastic bags;

[0018] Figure 3 A schematic diagram of the installation of the auxiliary rod in the injection molding holding mechanism for plastic bags;

[0019] Figure 4 A schematic diagram of spring A in the compression holding mechanism for injection molding of plastic bags;

[0020] Figure 5 A schematic diagram of the installation of the heating plate in the compression holding mechanism for injection molding of plastic bags;

[0021] Figure 6 A schematic diagram of the vacuum suction plate in the pressure holding mechanism for injection molding of plastic bags.

[0022] In the diagram: 1. Connecting plate; 2. Vacuum suction plate; 3. Slider; 4. Electric push rod A; 5. Extrusion plate A; 6. Spring A; 7. Extrusion plate B; 8. Upright pole A; 9. Air pump; 10. Extrusion rod; 11. Sleeve; 12. Spring B; 13. Electric push rod B; 14. Support rod; 15. Bracket; 16. Auxiliary rod; 17. Connecting rod; 18. Sleeve rod; 19. Insert rod; 20. Load-bearing block; 21. Spring C; 22. Pressure plate; 23. Heating plate; 24. Pad; 25. Upright pole B. Detailed Implementation

[0023] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0024] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0025] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. Those skilled in the art should understand that the present application can also be implemented without certain specific details. In some examples, methods, means, elements well known to those skilled in the art are not described in detail, in order to highlight the main idea of the present application.

[0026] Referring to Figures 1-6 The utility model provides 2 technical schemes:

[0027] Embodiment one:

[0028] A kind of plastic luggage injection molding is pressed with mechanism, including connecting plate 1, the upper surface of connecting plate 1 is uniformly fixedly connected with extrusion mechanism around, the upper surface of extrusion mechanism is fixedly connected with local pressurization mechanism, the upper surface of local pressurization mechanism is fixedly connected with support mechanism on both sides, the bottom of connecting plate 1 is fixedly connected with heating mechanism;

[0029] Local pressurization mechanism includes vacuum suction plate 2, the bottom of vacuum suction plate 2 is equipped with track groove, vacuum suction hole is equipped in the inside of track groove, sliding block 3 is connected in the inside of track groove, the bottom of sliding block 3 is fixedly connected with A electric push rod 4, the bottom of A electric push rod 4 is fixedly connected with A extrusion disc 5, the bottom of A extrusion disc 5 is fixedly connected with A spring 6, the bottom of A spring 6 is fixedly connected with B extrusion disc 7, A vertical rod 8 is inserted in the inside of A spring 6, vacuum suction plate 2 upper surface both sides are fixedly connected with air pump 9.

[0030] When plastic luggage is pressed, it is integrally pressed using pressing plate 22, and on the basis of integral pressing, if some areas need greater pressing force, local pressing can help optimize the flow of plastic in the mold, avoid uneven filling problems, make the thickness and size control of the formed piece more accurate, local pressing can apply additional pressure to specific areas, which helps to eliminate possible bubbles, shrinkage and other defects, especially in complex shape and thin-walled structure forming, local quality problems can be avoided.

[0031] Embodiment two:

[0032] On the basis of embodiment one:

[0033] Extrusion mechanism includes extrusion rod 10, the bottom of extrusion rod 10 is fixedly connected to the upper surface of connecting plate 1, sleeve 11 is sleeved on the outer surface of extrusion rod 10, B spring 12 is fixedly connected in the inside of sleeve 11, vacuum suction plate 2 extrudes sleeve 11, sleeve 11 extrudes B spring 12 and extrusion rod 10, B spring 12 can play a role in slowing down, avoid excessive stamping force when pressing, leading to deformation of plastic luggage.

[0034] The supporting mechanism comprises a B electric push rod 13, one end of the B electric push rod 13 is fixedly connected to the upper surface of the vacuum suction plate 2, the other end of the B electric push rod 13 is fixedly connected with a supporting rod 14, both sides of the supporting rod 14 are fixedly connected with supports 15, both ends of the bottom of the support 15 are fixedly connected with auxiliary rods 16, the inner side walls of the auxiliary rods 16 are connected through connecting rods 17, the outer surface of the auxiliary rod 16 is sleeved with a sleeve rod 18.

[0035] A sliding groove is formed on one side of the sleeve rod 18, the sliding groove is slidably connected to the outer surface of the connecting rod 17, a hole groove is formed on the surface of the sleeve rod 18, the hole groove is inserted with a plug-in rod 19, the bottom of the sleeve rod 18 is fixedly connected with a bearing block 20, when the plastic luggage is injection molded and held, the supporting mechanism is used to place the holding plate 22 above the injection molding machine, the height of the auxiliary rod 16 in the sleeve rod 18 is adjusted according to the height of the injection molding machine, the connecting rod 17 can be pulled to lift and lower the auxiliary rod 16 in the sleeve rod 18, after being lifted to the appropriate height, the plug-in rod 19 is used to fix it.

[0036] The warming mechanism comprises a C spring 21, the upper surface of the C spring 21 is fixedly connected to the bottom of the connecting plate 1, one end of the C spring 21 is fixedly connected with a holding plate 22.

[0037] A square recess is formed on the bottom of the holding plate 22, the square recess is fixedly connected with a heating plate 23, the bottom of the heating plate 23 is fixedly connected with a backing plate 24, a B vertical rod 25 is inserted in the C spring 21, when the plastic luggage is injection molded and held, the warming mechanism can ensure that the mold temperature is maintained at an appropriate level, thereby reducing the cooling time of the plastic in the mold, speeding up the production efficiency, improving the mold temperature can improve the flowability of the molten plastic, so that it better fills the complex shape of the mold, in addition, the temperature of the mold can be maintained through the warming mechanism, which can reduce the forming defects caused by uneven temperature, such as warping, cracking, shrinkage, etc., ensure the size and appearance quality of the formed product, thereby improving the production quality.

[0038] On the basis of embodiment one and embodiment two: during the injection molding and pressing of the plastic luggage, the pressing plate 22 is placed above the injection molding machine by using the supporting mechanism, the height of the auxiliary rod 16 in the sleeve rod 18 is adjusted according to the height of the injection molding machine, the auxiliary rod 16 in the sleeve rod 18 is pulled up and down by pulling the connecting rod 17, after being lifted to the appropriate height, it is fixed by using the plug-in rod 19, then the B electric push rod 13 is started to lift, the B electric push rod 13 drives the vacuum suction plate 2 and the extrusion mechanism to descend, the vacuum suction plate 2 extrudes the sleeve 11, the sleeve 11 extrudes the B spring 12 and the extrusion rod 10, the extrusion rod 10 presses the connecting plate 1, the connecting plate 1 extrudes the C spring 21 and the pressing plate 22, when the pressing plate 22 is extruded upward, it is limited by the B vertical rod 25 to avoid deformation of the pressing plate 22 during pressing, then the gasket 24 is tightly attached to the plastic luggage model, and it is pressed, during pressing, the heating plate 23 is turned on, the temperature of the mold can be maintained by the heating mechanism, which can reduce the forming defects caused by uneven temperature, such as warping, cracking, shrinkage, etc., to ensure the size and appearance quality of the formed product, thereby improving the production quality, then, during the pressing process, if local pressing is required, pull the A electric push rod 4 to slide the sliding block 3 in the vacuum suction plate 2 to adjust the position, after being adjusted to the appropriate position, start the air pump 9 to adsorb and fix the top of the A electric push rod 4, then start the A electric push rod 4, the A electric push rod 4 drives the A extrusion disc 5 downward, the A extrusion disc 5 extrudes the A spring 6 and the B extrusion disc 7, when the B extrusion disc 7 is extruded, the A spring 6 is limited by the A vertical rod 8 to avoid deformation of the A spring 6 during pressing, which affects the pressing, then the B extrusion disc 7 is driven by the A electric push rod 4 to stamp up and down, and is stamped on the connecting plate 1 and the pressing plate 22, thereby locally pressing the plastic luggage model to ensure its quality.

[0039] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0040] Although the embodiments of the present application have been shown and described, it is to be understood that for the purpose of the present application, the embodiments change, modify, replace, and vary in many ways without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A pressing mechanism for injection molding of plastic luggage, comprising a connecting plate (1), characterized in that: The upper surface of the connecting plate (1) is fixedly connected with an extrusion mechanism, the upper surface of the extrusion mechanism is fixedly connected with a local pressure mechanism, the upper surface of the local pressure mechanism is fixedly connected with a support mechanism, and the bottom of the connecting plate (1) is fixedly connected with a warming mechanism. The local pressure mechanism comprises a vacuum suction plate (2), the bottom of the vacuum suction plate (2) is provided with a track groove, the inside of the track groove is provided with a vacuum suction hole, the inside of the track groove is slidably connected with a sliding block (3), the bottom of the sliding block (3) is fixedly connected with an A electric push rod (4), the bottom of the A electric push rod (4) is fixedly connected with an A extrusion disc (5), the bottom of the A extrusion disc (5) is fixedly connected with an A spring (6), the bottom of the A spring (6) is fixedly connected with a B extrusion disc (7), the inside of the A spring (6) is inserted with an A vertical rod (8), and the upper surface of the vacuum suction plate (2) is fixedly connected with an air pump (9) on both sides.

2. The holding mechanism for injection molding plastic luggage according to claim 1, wherein: The extrusion mechanism comprises an extrusion rod (10), the bottom of the extrusion rod (10) is fixedly connected to the upper surface of the connecting plate (1), and the outer surface of the extrusion rod (10) is sleeved with a sleeve (11).

3. The holding mechanism for injection molding plastic luggage according to claim 1, wherein: The support mechanism comprises a B electric push rod (13), one end of the B electric push rod (13) is fixedly connected to the upper surface of the vacuum suction plate (2), the other end of the B electric push rod (13) is fixedly connected with a support rod (14), both sides of the support rod (14) are fixedly connected with a support (15), both ends of the bottom of the support (15) are fixedly connected with an auxiliary rod (16), the inner side walls of the auxiliary rods (16) are connected through connecting rods (17), and the outer surface of the auxiliary rod (16) is sleeved with a sleeve rod (18).

4. The holding mechanism for injection molding plastic luggage according to claim 3, wherein: One side of the sleeve rod (18) is provided with a sliding groove, the inside of the sliding groove is slidably connected to the outer surface of the connecting rod (17), the surface of the sleeve rod (18) is provided with a hole groove, the inside of the hole groove is inserted with a plug-in rod (19), and the bottom of the sleeve rod (18) is fixedly connected with a bearing block (20).

5. The holding mechanism for injection molding plastic luggage according to claim 1, wherein: The warming mechanism comprises a C spring (21), the upper surface of the C spring (21) is fixedly connected to the bottom of the connecting plate (1), and one end of the C spring (21) is fixedly connected with a pressing plate (22).

6. The holding mechanism for injection molding plastic luggage according to claim 5, wherein: The bottom of the pressing plate (22) is provided with a square groove, the inside of the square groove is fixedly connected with a heating plate (23), the bottom of the heating plate (23) is fixedly connected with a backing plate (24), and the inside of the C spring (21) is inserted with a B vertical rod (25).

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