Gas-assisted forming mold for large-size outdoor plastic sand beach deck chair

Abstract

The utility model provides a gas-assisted forming mold for a large-size outdoor plastic sand beach deck chair, and belongs to the field of injection molds. The mold comprises a movable mold plate and a fixed mold plate, a mold core is arranged in the movable mold plate, the mold core, the fixed mold plate and the movable mold plate form a forming cavity during mold closing, a locking structure used for fixing the fixed mold plate and the fixed mold plate is arranged on the movable mold plate, an ejection structure is arranged on the lower side of the movable mold plate, and the ejection structure is arranged on the movable mold plate. When the mold is closed, the movable mold plate and the fixed mold plate are fixed together through the locking structure, the movable mold plate and the fixed mold plate cannot generate position deviation under high-pressure injection molding, and the low product percent of pass caused by molding failure of a plastic part due to relative displacement between the movable mold plate and the fixed mold plate is prevented.

Description

Technical Field

[0001] This utility model belongs to the field of injection molds, and in particular relates to a gas-assisted molding mold for a large-size outdoor plastic beach chair. Background Technology

[0002] Injection molding, also known as injection molding, is a molding method that combines injection and molding. It is widely used in industrial manufacturing. When using an injection mold, the raw material undergoes molding, cooling, and demolding within the mold to obtain the preliminary molded product.

[0003] When manufacturing larger plastic parts, large molds are required. Since injection molding is performed under high pressure, a larger size can easily lead to insufficient connection between the moving and fixed mold plates. Under high pressure, the moving and fixed mold plates may shift relative to each other, which can easily cause the plastic parts to fail to form and result in a low product qualification rate.

[0004] For example, Chinese patent literature discloses a large-size narrow-edge refrigerator door liner injection mold [patent application number: CN202123121304.8], which includes a lower injection mold and an upper injection mold. The bottom of the upper injection mold is provided with a door liner forming cavity, and the lower injection mold is provided with a narrow-edge refrigerator door liner forming block assembly. In the injection molding process, the lower injection mold and the upper injection mold are brought close to each other, so that the narrow-edge refrigerator door liner forming block assembly abuts against the door liner forming cavity to form a complete cavity. Molten material is injected into the cavity from the injection section, and the narrow-edge refrigerator door liner forming block assembly is used to form a large-size narrow-edge refrigerator door liner. The forming accuracy is high, and no secondary processing is required, which greatly shortens the forming cycle. After injection molding is completed, the mold is opened, the ejector is moved, and the formed plastic part is ejected by the ejector, with a large ejection area. However, the mold has few locking structures between the moving and fixed mold plates, which can easily cause relative positional shifts between the moving and fixed mold plates under high-pressure injection molding, leading to molding failures and a low product qualification rate. Utility Model Content

[0005] The purpose of this utility model is to address the above-mentioned problems by providing a large-size outdoor plastic beach chair air-assisted molding mold.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A large-size outdoor plastic beach chair air-assisted molding mold includes a moving mold plate and a fixed mold plate. The moving mold plate has a core inside. The core, the fixed mold plate and the moving mold plate form a molding cavity when the mold is closed. The moving mold plate is provided with a locking structure for fixing the fixed mold plate and the fixed mold plate. The lower side of the moving mold plate is provided with an ejection structure.

[0008] In the aforementioned large-size outdoor plastic beach chair air-assisted molding mold, the locking structure includes at least two insertion blocks disposed at one end of the moving template, and the core has an insertion disc disposed on the moving template on each side.

[0009] In the aforementioned large-size outdoor plastic beach chair air-assisted molding mold, the locking structure also includes locking blocks fixed on both sides of the insertion plate. The locking blocks and the insertion plate are in the shape of an I-beam and form two slots.

[0010] In the aforementioned large-size outdoor plastic beach chair gas-assisted molding mold, two insertion blocks are placed flat or staggered, two insertion discs are placed flat or staggered, and locking blocks located on both sides of the insertion discs are placed flat or staggered.

[0011] In the aforementioned large-size outdoor plastic beach chair air-assisted molding mold, the ejection structure includes a lifting cavity located below the moving template, a lifting plate sliding inside the lifting cavity, a base plate on the side of the lifting cavity away from the moving template, a number of connecting holes passing through the base plate, the lifting plate being connected to an external linear actuator through the connecting holes, and a number of push rods provided on the lifting plate, the push rods slidingly passing through the moving template and flush with the outer surface of the core.

[0012] In the aforementioned large-size outdoor plastic beach chair air-assisted molding mold, the lifting cavity has several guide sleeves fixed to the lower surface of the moving template, and the push rod slides into the corresponding guide sleeve.

[0013] In the aforementioned large-size outdoor plastic beach chair air-assisted molding mold, the moving template is provided with several cooling holes, which are placed sequentially along the bottom of the core.

[0014] In the above-mentioned large-size outdoor plastic beach chair air-assisted molding mold, two connecting blocks are respectively provided at both ends of the core. When the mold is closed, a connecting cavity is formed between the connecting blocks, the moving template and the fixed template, which communicates with the molding cavity. The connecting blocks are provided with connecting grooves, which communicate with the connecting cavity or the molding cavity.

[0015] In the aforementioned large-size outdoor plastic beach chair gas-assisted molding mold, the core is provided with a guide groove that communicates with the injection tube. The guide groove extends toward one end of the core, and the end of the guide groove near the core is connected to two hook grooves.

[0016] In the aforementioned large-size outdoor plastic beach chair air-assisted molding mold, the guide channel is also connected to a diversion channel. The diversion channel is placed close to the hook ring channel, and both ends of the diversion channel are connected to the connecting channel. The diversion channel and the guide channel form a cross shape, and there is a push rod at the intersection of the diversion channel and the guide channel.

[0017] Compared with existing technologies, the advantages of this utility model are:

[0018] 1. During mold closing, the moving platen and the fixed platen are fixed together by a locking structure. Under high pressure injection molding, the moving platen and the fixed platen will not shift in position, preventing the plastic part from failing to be molded due to relative displacement between the moving platen and the fixed platen, resulting in a low product qualification rate.

[0019] 2. The two insertion blocks, the insertion plate, and the locking block can be placed in a staggered manner. Due to the wide mold, the fixed template and the moving template can be fixed from different positions, further improving the stability of the fixed template and the moving template.

[0020] 3. Since injection molding is required in the hook ring groove and connecting groove, this part requires more injection liquid, which is diverted through the guide groove and the distribution groove. In addition, since this part has a large adhesion area during demolding, ejector pins are installed at the intersection between the distribution groove and the guide groove to eject the plastic part and prevent it from twisting and deforming. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure;

[0022] Figure 2 This is a schematic diagram of the dynamic template;

[0023] Figure 3 yes Figure 2 A structural diagram from another direction;

[0024] Figure 4 yes Figure 2 A schematic diagram of the structure from another direction.

[0025] In the diagram: Moving template 10, Fixed template 11, Core 12, Locking structure 14, Ejection structure 15, Insertion block 16, Insertion disc 17, Locking block 18, Slot 19, Lifting cavity 20, Lifting plate 21, Base plate 22, Connecting hole 23, Push rod 24, Guide sleeve 25, Cooling hole 26, Connecting block 27, Connecting groove 28, Injection tube 29, Guide groove 30, Hook ring groove 31, Diverting groove 32. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0027] This utility model provides a large-size outdoor plastic beach chair air-assisted molding mold, combined with Figure 1-4 As shown, it includes a moving template 10 and a fixed template 11. The moving template 10 is provided with a core 12. The core 12, the fixed template 11 and the moving template 10 form a molding cavity when the mold is closed. The moving template 10 is provided with a locking structure 14 for fixing the fixed template 11 and the fixed template 11. The lower side of the moving template 10 is provided with an ejection structure 15.

[0028] Because the mold is large and the core 12 is also large, and the injection environment is a high-pressure environment, the stability between the moving mold plate 10 and the fixed mold plate 11 needs to be guaranteed during the injection process. Therefore, in this embodiment, the moving mold plate 10 and the fixed mold plate 11 are fixed together by the locking structure 14 when the mold is closed. Under high-pressure injection, the moving mold plate 10 and the fixed mold plate 11 will not shift in position, preventing the low product qualification rate caused by the failure of plastic part molding due to the relative displacement between the moving mold plate 10 and the fixed mold plate 11. When demolding, the moving mold plate 10 and the fixed mold plate 11 are relatively far apart, and then the plastic part is ejected by the ejection structure 15.

[0029] The locking structure 14 includes at least two insertion blocks 16 disposed at one end of the moving template 10, and the core 12 has an insertion disk 17 disposed on the moving template 10 on each side.

[0030] In this embodiment, when the moving template 10 and the fixed template 11 are closed, the insertion block 16 at the end of the moving template 10 is inserted into the fixed template 11, and the insertion discs 17 on both sides of the core 12 are also inserted into the fixed template 11. Since the mold is relatively wide, the moving template 10 and the fixed template 11 are fixed from the end and middle part of the mold, which improves the stability of the fixation between the two.

[0031] The locking structure 14 also includes locking blocks 18 fixed on both sides of the insertion disk 17. The locking blocks 18 and the insertion disk 17 are in the shape of an I-beam and form two slots 19.

[0032] In this embodiment, further, a portion of the fixed template 11 extends into the slot 19, and the I-shaped slot 19 can be further positioned from the front, back, left and right directions, thereby improving the fixing stability between the fixed template 11 and the moving template 10.

[0033] Two insertion blocks 16 are placed flush or staggered, two insertion discs 17 are placed flush or staggered, and locking blocks 18 located on both sides of the insertion discs 17 are placed flush or staggered.

[0034] In this embodiment, the two insertion blocks 16, the insertion disk 17, and the locking block 18 can be placed in a staggered manner. Since the mold is relatively wide, the fixed template 11 and the moving template 10 are fixed from different positions, which further improves the fixing stability between the fixed template 11 and the moving template 10.

[0035] The ejection structure 15 includes a lifting cavity 20 located below the moving template 10. A lifting plate 21 slides inside the lifting cavity 20. A bottom plate 22 is provided on the side of the lifting cavity 20 away from the moving template 10. Several connecting holes 23 are provided inside the bottom plate 22. The lifting plate 21 is connected to an external linear actuator through the connecting holes 23. Several push rods 24 are provided on the lifting plate 21. The push rods 24 slide inside the moving template 10 and are flush with the outer surface of the core 12.

[0036] In this embodiment, during the ejection process, the lifting plate 21 is connected to an external linear driver. The output shaft of the external linear driver passes through the connecting hole 23 and is connected to the lifting plate 21. The lifting plate 21 moves upward and, along with the ejector rod 24, ejects the plastic part upward to complete the demolding process.

[0037] The lifting cavity 20 has several guide sleeves 25 fixed to the lower surface of the moving template 10, and the top rod 24 slides into the corresponding guide sleeve 25.

[0038] In this embodiment, since the plastic part is relatively long, a large number of ejector pins 24 are required to facilitate demolding. Therefore, guide sleeves 25 are used to stabilize the movement of the ejector pins 24.

[0039] The moving template 10 is provided with a number of cooling holes 26, which are placed sequentially along the bottom of the core 12.

[0040] In this embodiment, the plastic part on the core 12 can be cooled quickly.

[0041] The core 12 has two connecting blocks 27 at its two ends. When the mold is closed, the connecting blocks 27, the moving template 10 and the fixed template 11 form a connecting cavity that communicates with the molding cavity. The connecting blocks 27 have connecting grooves 28 that communicate with the connecting cavity or the molding cavity.

[0042] In this embodiment, the molded plastic part is the leg part of the plastic stool. The connecting block 27 and the connecting groove 28 are used to form the connecting part that is close to other parts of the plastic stool, such as the stool body and the stool back. The injection liquid flows into the connecting groove 28 and the outer surface of the connecting block 27 and forms the part.

[0043] The core 12 is provided with a flow guide groove 30 that communicates with the injection tube 29. The flow guide groove 30 extends toward one end of the core 12, and the end of the flow guide groove 30 near the end of the core 12 is connected to two hook grooves 31.

[0044] In this embodiment, the hook groove 31 is used for the hook part of the molded plastic part and is used to connect with the fabric. The injection molding liquid flows into the hook groove 31 through the guide groove 30 and is formed.

[0045] The flow guide trough 30 is also connected to a flow divider 32. The flow divider 32 is placed close to the hook ring trough 31, and both ends of the flow divider 32 are connected to the connecting groove 28. The flow divider 32 and the flow guide 30 form a cross shape. A top rod 24 is provided at the intersection of the flow divider 32 and the flow guide 30.

[0046] In this embodiment, since injection molding is required on the hook groove 31 and the connecting groove 28, this part requires more injection liquid, which is diverted through the guide groove 30 and the diversion groove 32. In addition, since this part has a large adhesion area during demolding, it is ejected by the ejector rod 24 provided at the intersection between the diversion groove 32 and the guide groove 30 to prevent the plastic part from twisting and deforming.

[0047] The working principle of this utility model is as follows: the moving template 10 and the fixed template 11 close together, so that the insertion block 16 at the end of the moving template 10 is inserted into the fixed template 11, and the insertion discs 17 on both sides of the core 12 are also inserted into the fixed template 11. The part of the fixed template 11 extends into the slot 19. The injection molding liquid injects the mold. After injection molding and cooling, the output shaft of the external linear driver passes through the connecting hole 23 and is connected to the lifting plate 21. The lifting plate 21 moves upward and pushes the plastic part out with the ejector rod 24 to complete the demolding work.

[0048] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0049] Although this article frequently uses terms such as moving template 10, fixed template 11, core 12, locking structure 14, ejection structure 15, insertion block 16, insertion plate 17, locking block 18, slot 19, lifting cavity 20, lifting plate 21, bottom plate 22, connecting hole 23, ejector rod 24, guide sleeve 25, cooling hole 26, connecting block 27, connecting groove 28, injection tube 29, guide groove 30, hook groove 31, and diversion groove 32, these terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any kind of additional limitation would contradict the spirit of this utility model.

Claims

1. A large-size outdoor plastic beach chair air-assisted molding mold, characterized in that, It includes a moving template (10) and a fixed template (11). The moving template (10) is provided with a core (12). The core (12), the fixed template (11) and the moving template (10) form a molding cavity when the mold is closed. The moving template (10) is provided with a locking structure (14) for fixing the fixed template (11) and the fixed template (11). The lower side of the moving template (10) is provided with an ejection structure (15).

2. The gas-assisted molding die for a large-size outdoor plastic beach chair according to claim 1, characterized in that, The locking structure (14) includes at least two insertion blocks (16) disposed at one end of the moving template (10), and the core (12) has an insertion disk (17) disposed on the moving template (10) on each side.

3. The gas-assisted molding die for large-size outdoor plastic beach chairs according to claim 2, characterized in that, The locking structure (14) further includes locking blocks (18) fixed on both sides of the insertion disk (17). The locking blocks (18) and the insertion disk (17) are in the shape of an I-beam and form two slots (19).

4. The gas-assisted molding die for a large-size outdoor plastic beach chair according to claim 3, characterized in that, Two insertion blocks (16) are placed flush or staggered, two insertion disks (17) are placed flush or staggered, and locking blocks (18) located on both sides of the insertion disks (17) are placed flush or staggered.

5. The gas-assisted molding die for a large-size outdoor plastic beach chair according to claim 1, characterized in that, The ejection structure (15) includes a lifting cavity (20) located below the moving template (10). A lifting plate (21) slides inside the lifting cavity (20). A bottom plate (22) is provided on the side of the lifting cavity (20) away from the moving template (10). Several connecting holes (23) are provided inside the bottom plate (22). The lifting plate (21) is connected to an external linear actuator through the connecting holes (23). Several push rods (24) are provided on the lifting plate (21). The push rods (24) slide inside the moving template (10) and are flush with the outer surface of the core (12).

6. The gas-assisted molding die for a large-size outdoor plastic beach chair according to claim 5, characterized in that, The lifting cavity (20) has several guide sleeves (25) fixed to the lower surface of the moving template (10), and the top rod (24) slides into the corresponding guide sleeve (25).

7. The large-size outdoor plastic beach chair air-assisted molding mold according to claim 1, characterized in that, The moving template (10) is provided with a number of cooling holes (26), and the cooling holes (26) are placed sequentially along the bottom of the core (12).

8. The gas-assisted molding die for a large-size outdoor plastic beach chair according to claim 1, characterized in that, The core (12) has two connecting blocks (27) at both ends. When the mold is closed, the connecting block (27), the moving template (10) and the fixed template (11) form a connecting cavity that communicates with the molding cavity. The connecting block (27) has a connecting groove (28) inside, and the connecting groove (28) communicates with the connecting cavity or the molding cavity.

9. The gas-assisted molding die for a large-size outdoor plastic beach chair according to claim 5, characterized in that, The core (12) is provided with a guide groove (30) that communicates with the injection tube (29). The guide groove (30) extends toward one end of the core (12), and the end of the guide groove (30) near the end of the core (12) is connected to two hook grooves (31).

10. The gas-assisted molding die for a large-size outdoor plastic beach chair according to claim 9, characterized in that, The guide channel (30) is also connected to a diversion channel (32). The diversion channel (32) is placed close to the hook groove (31), and both ends of the diversion channel (32) are connected to the connecting groove (28). The diversion channel (32) and the guide channel (30) form a cross shape. There is a top rod (24) at the intersection between the diversion channel (32) and the guide channel (30).

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