Demoulding structure of long-cylinder rubber glove mould

Abstract

The utility model relates to a demoulding structure of a long-barrel rubber glove mould, which belongs to the technical field of lead glove demoulding and comprises a convex rib, a groove and an air hole, the convex rib is connected to a joint surface of a lower mould and an upper mould, the convex rib is annularly arranged in a lower cavity formed in the lower mould, one end of the lower cavity is opened, and the groove is formed in the joint surface of the lower mould and the upper mould. The groove is annularly formed in an upper cavity formed in the upper die and connected with the protruding rib in an inserted mode, the air holes are formed in the upper male die and the lower male die, the lower die can move away from the lower male die, the upper die can move away from the upper male die, a product cavity is formed between the lower die and the upper die and between the lower male die and the upper male die, and the volume of the product cavity is increased after the protruding rib and the groove move relatively. The technical problem that the yield is low when lead gloves are inflated and demoulded in the prior art can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of lead glove demoulding, in particular to a demoulding structure of a long-tube rubber glove mold. Background Art

[0002] Lead-containing long-sleeved rubber gloves (lead gloves) contain lead in the raw materials. If liquid lead is required for infiltration molding, strict safety measures are required to handle and operate liquid lead, and there are certain safety hazards. Therefore, injection molds are often used for production. The lead gloves formed by injection molds and extruders can obtain a more uniform wall thickness due to the extrusion of the punch and die. However, due to the complex shape of the gloves, the lead gloves will adhere to the punch. If the lead gloves are removed directly after the injection molding is completed, it is easy to cause the gloves to rupture and become scrapped.

[0003] The existing patent with publication number CN117817925A discloses a glove demoulding device and demoulding method, including a workbench, a plurality of demoulding mechanisms are arranged on one side of the workbench, a conveying mechanism is arranged on one side of the demoulding mechanism, and a plurality of conveying blocks are fixedly connected to the surface of the conveying mechanism, the demoulding mechanism includes a movable connection block movably connected to one end of the conveying block, a gas filling hole is opened on one side of the top of the movable connection block, a hand mold body is fixedly connected to the bottom end of the movable connection block, five groups of air outlet holes are fixedly connected to the bottom end of the hand mold body, the air outlet holes are communicated with the air filling holes, a base is arranged below the air outlet holes, a plurality of storage tables are fixedly connected to one side of the base, and a plurality of demoulding clamps are arranged inside the base.

[0004] The prior art has the following problems:

[0005] When the lead glove is slightly adhered to the hand mold body (convex mold), continuous inflation will cause the non-adherent part of the lead glove to continue to expand due to the lack of limit on the outside of the lead glove body, further causing local wall thickness to become thinner or damaged, and reducing the demolding yield rate. Utility Model Content

[0006] The utility model provides a demoulding structure for a long-tube rubber glove mold, which can solve the technical problem of low yield rate of lead gloves during inflation and demoulding in the prior art.

[0007] In order to achieve the above object, the utility model is implemented through the following technical solutions:

[0008] The present application provides a demoulding structure of a long-tube rubber glove mold, which includes a convex rib, a groove and an air hole. The convex rib is connected to the joint surface of the lower mold and the upper mold, the convex rib is arranged around the lower cavity opened by the lower mold, one end of the lower cavity is open, the groove is arranged on the joint surface of the lower mold and the upper mold, the groove is arranged around the upper cavity opened by the upper mold and is plugged with the convex rib, the air hole is arranged in the upper punch and the lower punch, the lower mold can move away from the lower punch, the upper mold can move away from the upper punch, a product cavity is formed between the lower mold and the upper mold and the lower punch and the upper punch, and the volume of the product cavity is increased after the convex rib and the groove move relative to each other.

[0009] Through the above technical scheme, the overlapping length and relative movement distance of the ribs and grooves are used to increase the volume of the product cavity, thereby limiting the local excessive expansion and thinning of the lead gloves after inflation, and improving the yield rate of lead gloves during inflation and demolding.

[0010] In the utility model, the demolding structure also includes a movable plug and a driving boss. The movable plug is slidably connected to the air hole. The driving boss abuts against one end of the movable plug away from the air hole. The driving boss drives the movable plug to be inserted into the air hole. The end face of the end of the movable plug inserted into the air hole is flush with the molding surface of the upper punch or the lower punch.

[0011] Through the above technical solution, the pores are blocked during injection molding by the movement of the movable plug relative to the pores, thereby avoiding surface defects on the inner wall of the lead gloves and improving product quality.

[0012] In the utility model, the demolding structure also includes a mounting groove and a first spring, the mounting groove is connected to the inner side of the upper punch and the lower punch, the air hole is opened in the mounting groove, the first spring is inserted into the mounting groove, the end of the first spring facing away from the mounting groove is connected to the movable plug, and the first spring drives the movable plug to separate from the air hole.

[0013] Through the above technical solution, the first spring is used to connect the movable plug in the installation groove, and a resetting elastic force is applied to the movable plug, which simplifies the movement mechanism of the movable plug and improves the utilization rate of the space between the upper punch and the lower punch.

[0014] In the utility model, the demolding structure further includes a finger block and a wedge block, the finger block is slidably connected between the upper punch and the lower punch, the wedge block is connected to the upper punch or the lower punch, the wedge block is inserted into the finger block, the finger block blocks the air hole when sliding toward the wedge block, and the finger block is separated from the air hole when sliding away from the wedge block.

[0015] Through the above technical scheme, finger block and wedge block are used to open and close the air holes in the limited space of the finger position of the upper punch and the lower punch, thereby increasing the demoulding degree in the narrow space of the finger part and improving the yield rate of inflation demoulding.

[0016] In the present invention, the demoulding structure further comprises a driving frame, which is connected to the driving boss and the finger block, and the driving frame moves along the length direction of the upper cavity and the lower cavity.

[0017] Through the above technical solution, a drive frame is used to uniformly move the drive boss and the finger block, which improves the uniformity of movement and facilitates the control of production rhythm.

[0018] In the present invention, the driving frame is provided with a driving groove, the driving groove is abutted against a driving block connected to the upper mold, and the driving block pushes the driving frame to move in a direction away from the opening of the lower cavity.

[0019] Through the above technical solution, the relative sliding movement of the driving frame by the driving block and the driving groove makes the driving structure simpler and the operation more stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 An axonometric view of a long rubber glove mold provided by an embodiment of the utility model;

[0022] Figure 2 An exploded view of a long rubber glove mold provided by an embodiment of the utility model;

[0023] Figure 3 A schematic diagram of the partial structure of a demoulding structure of a long-tube rubber glove mold provided by an embodiment of the utility model;

[0024] Figure 4 An exploded view of a male mold provided in an embodiment of the utility model;

[0025] Figure 5 A partial cross-sectional view of a demoulding structure of a long-tube rubber glove mold provided by an embodiment of the utility model;

[0026] Figure 6 A cross-sectional view of the finger structure of a demoulding structure of a long-tube rubber glove mold provided by an embodiment of the utility model;

[0027] Figure 7 A schematic diagram of a driving structure of a demoulding structure of a long-tube rubber glove mold provided in an embodiment of the utility model.

[0028] Icons: 1-lower die; 101-convex rib; 102-lower cavity; 2-upper die; 201-groove; 202-upper cavity; 203-driving block; 301-upper punch; 302-lower punch; 303-punch seat; 304-trachea interface; 305-air hole; 306-mounting groove; 307-movable plug; 3071-first spring; 3072-connecting ring; 308-driving frame; 309-driving groove; 310-driving boss; 311-wedge block; 312-finger block; 313-second spring; 314-spring fixing column; 401-product cavity. DETAILED DESCRIPTION

[0029] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0030] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0031] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0032] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be welding, bolt connection, or riveting; it can be fixed connection, detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] Embodiment 1:

[0034] Please refer to Figure 1-Figure 7 , Figure 1-Figure 7 An embodiment of the present application is shown.

[0035] This embodiment provides a long rubber glove mold demoulding structure, such as Figure 3 As shown, it includes ribs 101, grooves 201 and air holes 305. The ribs 101 are processed on the joint surface of the lower mold 1 and the upper mold 2 after casting. Figure 2 As shown, the convex rib 101 is arranged around the lower cavity 102 opened by the lower die 1, one end of the lower cavity 102 is open, the groove 201 is arranged on the joint surface of the lower die 1 and the upper die 2, the groove 201 is arranged around the upper cavity 202 opened by the upper die 2, and is plugged with the convex rib 101, and the air hole 305 is opened in the upper punch 301 and the lower punch 302, as shown in FIG. Figure 3 As shown, the lower mold 1 can move away from the lower punch 302, and the upper mold 2 can move away from the upper punch 301. A product cavity 401 is formed between the lower mold 1 and the upper mold 2 and the lower punch 302 and the upper punch 301. The volume of the product cavity 401 increases after the rib 101 and the groove 201 move relative to each other.

[0036] When in use, after the upper mold 2 and the lower mold 1 are closed, the rib 101 and the groove 201 are completely closed. At this time, the size of the product cavity 401 is the design size of the lead glove. After injection molding and cooling, the lead glove is formed. Figure 3 As shown, after the upper mold 2 and the lower mold 1 are separated upward and downward by one quarter of the height of the convex rib 101 at the same time, the convex rib 101 and the groove 201 only overlap by one half. At this time, the inner wall of the lead glove fits the punch (the upper punch 301 and the lower punch 302 are spliced ​​to form a punch) and the outer wall is separated from the upper mold 2 and the lower mold 1. Subsequently, gas is introduced through the air hole 305, and the lead glove expands and separates from the punch until the outer wall of the lead glove fits with the moved lower cavity 102 and the upper cavity 202. Subsequently, the upper mold 2 and the lower mold 1 are completely separated to remove the lead glove from the punch.

[0037] It should be noted that the overlapping distance between the rib 101 and the groove 201 is controlled by the injection molding machine workbench. The rib 101 and the groove 201 cannot be completely separated before inflation to avoid excessive expansion and rupture of the side of the lead glove. The corners are rounded to avoid scratching the lead glove. When the lead glove and the punch are adhered, the pressure around the adhered part will increase due to the restriction of the product cavity 401, thereby increasing the separation force on the adhered part.

[0038] Through the above technical solution, the overlapping length and relative movement distance of the rib 101 and the groove 201 are used to increase the volume of the product cavity 401, thereby limiting the local excessive expansion and thinning of the lead gloves after inflation, and improving the yield rate of the lead gloves during inflation and demolding.

[0039] As a preferred implementation method, Figure 5As shown, the demoulding structure also includes a movable plug 307 and a driving boss 310. The air holes 305 on the upper punch 301 and the lower punch 302 are slidably connected with the movable plug 307. The driving boss 310 abuts against the end of the movable plug 307 away from the air hole 305. The end of the movable plug 307 abutting against the driving boss 310 is hemispherical. When the driving boss 310 moves to the right, the movable plug 307 is driven to rise and insert into the air hole 305. When the driving boss 310 moves to the left, the movable plug 307 is recovered and separated from the air outlet 305 under the action of the first spring 3071. At this time, the compressed gas can enter the punch through the air pipe interface 304 and fill into the lead glove through the air hole 305 to expand it. The end face of one end of the movable plug 307 inserted into the air hole 305 is installed to the upper (lower) dead point limit and then ground to be flush with the surface of the upper punch 301 (lower punch 302).

[0040] When in use, the driving boss 310 moves to the right in the mold closing state to lift the movable plug 307 through the inclined surface so that its end face is flush with the convex model surface. After the injection molding is cooled, the driving boss 310 moves to the left and the inclined surface is separated from the movable plug 307. Then, under the action of the first spring 3071, the movable plug 307 is separated from the air hole 305, so that the gas can be filled into the inner wall of the lead glove.

[0041] It should be noted that the bevel angle of the driving boss 310 needs to be adjusted according to the specific mold size and stroke, and the wall thickness of the punch around the air hole 305 needs to be adjusted according to the stroke of the movable plug 307. Figure 5 It only illustrates the relative positions and movement relationships of related structures, and does not involve specific sizes and angles.

[0042] Through the above technical solution, the movable plug 307 is moved relative to the air hole 305 to block the air hole 305 during injection molding, thereby avoiding surface defects on the inner wall of the lead glove and improving product quality.

[0043] As a preferred implementation method, Figure 4 As shown, the demoulding structure further includes a mounting groove 306 and a first spring 3071. The mounting groove 306 is integrally cast with the upper punch 301 or the lower punch 302 and then machined on the inner side of the upper punch 301 or the lower punch 302. Figure 5 As shown, the air hole 305 is opened in the installation groove 306, the outer diameter of the first spring 3071 is interference fit with the inner diameter of the installation groove 306, and the end of the first spring 3071 away from the installation groove 306 is welded to the connecting ring 3072, the connecting ring 3072 is threadedly connected to the movable plug 307 and the compression force of the first spring 3071 is adjusted by adjusting the position of the connecting ring 3072 relative to the movable plug 307 to ensure that the movable plug 307 can be stably separated from the air hole 305, and the first spring 3071 drives the movable plug 307 to separate from the air hole 305.

[0044] When using, Figure 5 As shown, the first spring 3071 is in a compressed state. At this time, the movable plug 307 is lifted up by the driving boss 310 and is flush with the convex model surface. After the driving boss 310 moves to the left, the first spring 3071 is released and stretched, so that the movable plug 307 is displaced toward the driving boss 310, exposing the air hole 305 for ventilation.

[0045] It should be noted that the opening of the end of the air hole 305 facing the inner side of the punch needs to be chamfered so that the movable plug 307 can be aligned with the mold surface when it is lifted by the driving boss 310, thereby avoiding the movable plug 307 from getting stuck due to the lack of a guide mechanism after being separated from the air hole 305. If necessary, a guide sleeve can be added to guide the movable plug 307 more accurately.

[0046] Through the above technical solution, the first spring 3071 is used to connect the movable plug 307 in the installation groove 306, and a reset elastic force is applied to the movable plug 307, which simplifies the movement mechanism of the movable plug 307 and improves the utilization rate of the intermediate space between the upper punch 301 and the lower punch 302.

[0047] As a preferred implementation method, Figure 4 and Figure 6 As shown, the demolding structure further includes a finger block 312 and a wedge block 311. The finger block 312 is slidably connected between the upper punch 301 and the lower punch 302. The wedge block 311 is inserted into the lower punch 302. The wedge-shaped end of the wedge block 311 is inserted into the open end of the finger block 312. When the finger block 312 slides toward the wedge block 311, the wedge-shaped end is inserted into the open end to open the finger block 312 toward the upper punch 301 and the lower punch 302. The plug on its surface is embedded in the air hole 305 to seal it. When the finger block 312 slides away from the wedge block 311, the plug is separated from the air hole 305.

[0048] When using, Figure 4 The wedge block 311 shown is inserted into the threaded hole column on the inner side of the lower punch 302 for positioning, and then the upper punch 301 is closed and connected to the threaded hole column by screws, and the screw countersunk holes on the upper punch 301 are welded and sealed and ground flat, and then the finger block 312 is inserted through the opening end of the upper punch 301 and the lower punch 302. When the finger block 312 enters the finger part on the inner side of the punch, the plug on it is pressed and retracted inward. When it moves to the air hole 305, the opening of the finger block 312 is combined with the wedge block 311, and then under the action of the wedge block 311, the finger block 312 opens to the air hole 305 on both sides of the punch to seal it.

[0049] It should be noted that if Figure 6The figure only illustrates the relative position relationship and does not involve specific dimensions and angles. The specific length of the bevel angle at one end of the air hole 305 and the length and angle of the wedge block 311 are adjusted according to the actual punch size.

[0050] Through the above technical solution, the finger block 312 and the wedge block 311 are used to open and close the air hole 305 in the limited space of the finger position of the upper punch 301 and the lower punch 302, thereby increasing the demoulding degree in the narrow space of the finger position and improving the yield rate of inflation demoulding.

[0051] As a preferred implementation method, Figure 4 As shown, the demoulding structure further includes a driving frame 308, which is welded to a driving boss 310 and a finger block 312, and slides along the length direction of the upper cavity 202 and the lower cavity 102 through guide grooves on both sides of the punch.

[0052] During use, as the upper mold 2 and the lower mold 1 are closed, the driving frame 308 moves toward the direction of the punch finger so that the movable plug 307 and the finger block 312 seal the air hole 305. After the injection molding is cooled, the driving frame 308 moves toward the direction of the punch opening to open the air hole 305, and then the air source is connected through the air pipe interface 304 to introduce air to demold the lead gloves.

[0053] Through the above technical solution, the driving frame 308 is used to uniformly move the driving boss 310 and the finger block 312, which improves the uniformity of movement and facilitates the control of production rhythm.

[0054] As a preferred implementation method, Figure 7 As shown, the driving frame 308 is provided with a driving groove 309 , and the driving groove 309 abuts against a driving block 203 connected to the upper mold 2 , and the driving block 203 pushes the driving frame 308 to move in a direction away from the opening of the lower cavity 102 .

[0055] When using, Figure 7 As shown, the upper punch 301 and the lower punch 302 are connected to the punch seat 303 by screws, and then the screw countersunk holes are sealed by welding and the flat surfaces are ground. The driving frame 308 is inserted into the through hole of the punch seat 303 before the upper punch 301 and the lower punch 302 are connected. When the upper mold 2 is closed, the driving block 203 is inserted along the opening of the upper punch 301 and the punch seat 303 and abuts against the driving groove 309 to push the driving frame 308 toward the tip of the punch, as shown in FIG. Figure 3 As shown, when the upper mold 2 and the lower mold 1 are displaced a small distance during the inflating demoulding, the driving block 203 rises to make room for the driving frame 308 to move. Figure 4Under the traction of the second spring 313 shown, the driving frame 308 moves toward the spring fixing column 314 to open the air hole 305, and then the air is inflated and demoulded. Finally, the upper mold 2 and the lower mold 1 are completely separated, and the lead gloves are removed.

[0056] Through the above technical solution, the relative sliding movement of the driving block 203 and the driving slot 309 to move the driving frame 308 makes the driving structure simpler and the operation more stable and reliable.

[0057] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope recorded in the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A demoulding structure for a long rubber glove mold, characterized in that: include: A convex rib (101) is connected to the joint surface of the lower mold (1) and the upper mold (2), and the convex rib (101) is arranged around a lower mold cavity (102) formed by the lower mold (1), and one end of the lower mold cavity (102) is open; A groove (201) is formed on the joint surface between the upper mold (2) and the lower mold (1), the groove (201) is arranged around the upper mold cavity (202) formed in the upper mold (2), and a part of the convex rib (101) is inserted into the groove (201); Air holes (305) are provided in the upper punch (301) and the lower punch (302); The lower mold (1) can move away from the lower punch (302), and the upper mold (2) can move away from the upper punch (301). A product cavity (401) is formed between the lower mold (1) and the upper mold (2) and the lower punch (302) and the upper punch (301). The convex rib (101) and the groove (201) move relative to each other to increase the volume of the product cavity (401).

2. The demoulding structure of the long rubber glove mold according to claim 1, characterized in that: Also includes: A movable plug (307) is slidably connected to the air hole (305); The driving boss (310) abuts against one end of the movable plug (307) away from the air hole (305), and the driving boss (310) drives the movable plug (307) to be inserted into the air hole (305). The end surface of one end of the movable plug (307) inserted into the air hole (305) is flush with the molding surface of the upper punch (301) or the lower punch (302).

3. The demoulding structure of the long rubber glove mold according to claim 2, characterized in that: Also includes: A mounting groove (306) connected to the inner sides of the upper punch (301) and the lower punch (302), wherein the air hole (305) is provided in the mounting groove (306); The first spring (3071) is inserted into the installation slot (306), and one end of the first spring (3071) facing away from the installation slot (306) is connected to the movable plug (307), and the first spring (3071) drives the movable plug (307) to separate from the air hole (305).

4. The demoulding structure of the long rubber glove mold according to claim 3, characterized in that: Also includes: A finger block (312) is slidably connected between the upper punch (301) and the lower punch (302); A wedge block (311) is connected to the upper punch (301) or the lower punch (302). The wedge block (311) is inserted into the finger block (312). When the finger block (312) slides toward the wedge block (311), it blocks the air hole (305). When the finger block (312) slides away from the wedge block (311), it separates from the air hole (305).

5. The demoulding structure of the long rubber glove mold according to claim 4, characterized in that: Also includes: A driving frame (308) is connected to the driving boss (310) and the finger block (312), and the driving frame (308) moves along the length direction of the upper cavity (202) and the lower cavity (102).

6. The demoulding structure of the long rubber glove mold according to claim 5, characterized in that: The driving frame (308) is provided with a driving groove (309), and the driving groove (309) is in contact with a driving block (203) connected to the upper mold (2), and the driving block (203) pushes the driving frame (308) to move in a direction away from the opening of the lower mold cavity (102).

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