A molding die and method for a groove elastic body of an easy-open lid for beer packaging

Abstract

The present invention discloses a forming die and method for a groove elastic body of an easy-open lid for beer packaging. A feeding pipe is provided on a fixed part and connected to an external feeding device, a feeding die head is provided at the bottom of the feeding pipe; a blanking gap is provided between the feeding die head and the inner wall of the feeding pipe, a material storage gap is provided between the upper end of a support platform at the bottom of the feeding die head and the bottom end surface of the feeding pipe; an adjustment device is provided in the feeding pipe and connected to the feeding die head to adjust the material storage gap between the feeding die head and the bottom end surface of the feeding pipe; a pushing pipe is provided on the outside of the feeding pipe; the present invention adjusts the size of the material storage gap through an adjustment process; after external feeding, a ring-shaped feeding area is temporarily stored on the material storage gap, and then the TPE material is pushed into the groove of the easy-open lid in a ring shape by pressing down the pushing pipe and extruding and shaping.

Description

Technical Field

[0001] The invention belongs to the technical field of beer packaging cover sealing, and in particular relates to a molding die and method for a groove elastic body of an easy-open cover of beer packaging. Background Art

[0002] In the prior art beer bottle packaging cap, in order to achieve sealing, a sealing pad is set on the inside of the bottle cap. This sealing pad is made of foamed plastic material, that is, PVC. When it is formed, a layer of liquid sealant is injected into the groove inside the bottle cap by equipment, and the sealing pad is formed after foaming and adhered to the bottom of the bottle cap. This material has poor stability to light and heat, and will decompose to produce hydrogen chloride, and further autocatalytic decomposition, causing discoloration, and physical and mechanical properties also decrease rapidly. In practical applications, stabilizers must be added to improve the stability to heat and light. Due to the addition of stabilizers, toxic and harmful substances such as phthalates (PAES), bisphenol A (BPA), and primary aromatic amines are produced, which are not good for food; moreover, during the transportation and storage of beer, some harmful substances will be immersed in the beer due to the long-term immersion of PVC in alcohol, which increases the risk of food safety.

[0003] In view of the various shortcomings of the PVC material sealing gasket in the prior art, the applicant has made improvements, and adopted TPE material to replace PVC material to realize the sealing gasket molding. However, the improved molding process is as follows: Figure 1 The processing method shown is to release the TPE material in a dotted manner to Figure 1 In the center of the inner part of the bottle cap shown in the figure, the sheet forming inside the packaging cap is achieved by the overall downward pressing of the downward pressing device; however, when the material is released in this forming method, due to the irregular discharge of TPE material and the offset of the material, when the die head presses the material, more material flows in places where the material is thick or there is more, and conversely, less material flows in places where there is less material, so the following product disadvantages will appear: 1. The sealing ring cannot be pressed to the edge and the outer ring of the sealing ring is irregular, resulting in poor sealing; 2. For the easy-open cap, this sealing gasket is in sheet form. When the pull ring is opened, the sheet sealing gasket directly fits on the mouth of the wine bottle, resulting in the inability to smoothly take out the wine; 3. The sheet-shaped gasket not only wastes materials but also increases the complexity of use.

[0004] In summary, the technical problems to be solved by this patent application are: 1. How to use a molding method to enable the fluid material to accurately fall into the groove of the beer bottle packaging cap and achieve molding; 2. How to design a set of feeding and molding devices in conjunction with this molding method, which can ensure the stability of the sealing ring during one-piece molding, so that the molded sealing ring has uniform thickness and precise size. Summary of the invention

[0005] To overcome the deficiencies of the prior art, the present invention provides a molding die and method for a groove elastic body of an easy-open lid for beer packaging, which achieves the fixed-point release and molding of fluid materials inside the easy-open lid for beer packaging by designing an assembly.

[0006] In order to achieve the above technical objectives, the present invention adopts the following scheme: a forming mold for a groove elastomer of an easy-open lid for beer packaging, which is provided with a fixing part, a feeding pipe is provided on the fixing part and connected to an external feeding device, a feeding die head is provided at the bottom of the feeding pipe, and a supporting platform is provided at the bottom of the feeding die head; a blanking gap is provided between the feeding die head and the inner wall of the feeding pipe, and a material storage gap is provided between the upper end of the support platform and the bottom end surface of the feeding pipe; an adjustment device is provided in the feeding pipe and connected to the feeding die head to realize the adjustment of the material storage gap between the feeding die head and the bottom end surface of the feeding pipe; a pushing pipe is provided on the outside of the feeding pipe.

[0007] A fixing flange is arranged at the top of the fixing part, a countersunk hole is arranged on the fixing flange, the adjusting device passes through the countersunk hole and a sealing member is arranged in the countersunk hole to achieve sealing.

[0008] The adjusting device is an adjusting screw, the threaded section at the bottom end of which is fixedly matched with the threaded hole on the feeding die head, and a positioning ring is arranged on the adjusting screw, and the positioning ring cooperates with the limiting plate on the fixed disk to realize axial constraint.

[0009] The outer diameter of the feeding die head is matched with the inner wall of the feeding pipe in a concave-convex manner; the blanking gap is a vertical groove body processed on the inner wall of the feeding pipe.

[0010] A guide protrusion is arranged on the outer wall of the feeding die head, and an annular material storage gap is formed between the bottom of the guide protrusion and the supporting platform.

[0011] A circle of pressure spring is arranged around the adjusting screw rod between the top of the feeding die head and the supporting plate at the bottom of the countersunk hole.

[0012] The support platform is provided with a guide column, the wall of the feed pipe is provided with a guide hole, and a guide hole spring is provided in the guide hole; the guide column is inserted into the guide hole to squeeze the guide hole spring.

[0013] The material in the feed pipe of the present invention is made of TPE material.

[0014] A method for forming a groove elastic body for an easy-open lid of beer packaging is implemented by the above-disclosed mold, and the method comprises at least the following steps:

[0015] Adjustment process: adjust the relative position of the feeding die head in the feeding pipe, drive the feeding die head through the adjustment device, and adjust the size of the material storage gap between the feeding die head and the bottom end surface of the feeding pipe; this adjustment is carried out for different material amounts, and is carried out at the initial stage of production equipment operation. After debugging, it continues to operate without secondary adjustment;

[0016] In the feeding process, the fluid material is introduced into the feeding pipe through the external feeding device; the material enters the storage gap through the blanking gap and is temporarily stored on the upper surface of the support table;

[0017] In the pushing process, the feeding time of a single feeding is set through an external control system. When the material in the storage gap reaches a certain amount, the pushing tube is pressed down to push the material into the groove of the easy-open lid and squeeze it into shape.

[0018] The beneficial effects of the present invention are as follows: through the above arrangement, a feed pipe is provided on the fixed part of the present invention and is connected to an external feeding device, and a feed die is provided at the bottom of the feed pipe; a blanking gap is provided between the feed die and the inner wall of the feed pipe, and a material storage gap is provided between the upper end of the support platform at the bottom end of the feed die and the bottom end surface of the feed pipe; an adjustment device is provided in the feed pipe and is connected to the feed die to adjust the material storage gap between the feed die and the bottom end surface of the feed pipe; a pusher tube is provided on the outside of the feed pipe; the present invention adjusts the size of the material storage gap through an adjustment process; after external feeding, a ring-shaped feed area is temporarily stored on the material storage gap, and then the TPE material is pushed into the easy-open cover groove in a ring shape by pressing down the pusher tube and extruded to shape. The device and the molding method are ingeniously conceived and can realize one-time precise molding of the elastic body in the easy-open lid. The device realizes the molding of the annular elastomer while feeding the material, avoiding the disadvantages of uneven thickness, large contact surface with the wine body and easy adhesion to the mouth of the wine bottle during sheet molding, reducing production costs and eliminating the hidden dangers of the sealing structure to food safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the easy-open cover;

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 3 The present invention is a three-dimensional cross-sectional structure schematic diagram Figure Ⅰ ;

[0022] Figure 4 The present invention is a three-dimensional cross-sectional structure schematic diagram Figure II ;

[0023] Figure 5 Schematic diagram of the feeding die head adjustment structure Figure Ⅰ ;

[0024] Figure 6 Schematic diagram of the feeding die head adjustment structure Figure II ;

[0025] Figure 7 Schematic diagram of the feeding die head adjustment structure Figure III ;

[0026] Figure 8 for Figure 3 A schematic diagram of the enlarged structure of the middle A area;

[0027] Fig. 9 for Figure 4 A schematic diagram of the structure of the middle B region;

[0028] Fig.10 for Figure 7 A magnified schematic diagram of the structure of the middle C region;

[0029] Fig.11 The working state of the present invention is shown in FIG. Figure Ⅰ ;

[0030] Fig.12 The working state of the present invention is shown in FIG. Figure II ;

[0031] Fig.13 The working state of the present invention is shown in FIG. Figure III ;

[0032] Fig.14 The working state of the present invention is shown in FIG. Figure IV ;

[0033] In the accompanying drawings, 1. easy-open cover, 11. easy-open cover groove, 12. elastomer, 13. PVC material, 2. pushing part, 21. pushing flange, 22. pushing tube, 3. fixing part, 31. fixing flange, 32. feeding tube, 33. feeding joint, 34. vertical trough, 35. supporting plate, 36. guide hole, 4. fixing plate, 41. limiting plate, 5. adjusting screw, 51. threaded section, 52. positioning ring, 6. feeding die head, 61. supporting platform, 62. threaded hole, 63. guide protrusion, 64. spring gasket, 65. annular material storage gap, 66. material guide slope, 67. guide column, 7. pressure spring, 8. sealing rubber block, 81. rubber block extension, 9. guide hole spring. DETAILED DESCRIPTION

[0034] See attached Figure 1 As shown, the molding die and method of the groove elastic body are both used in Figure 1 The elastic body 12 in the easy-open cover groove 11 on the beer packaging easy-open cover is in the molding process.

[0035] The invention discloses a molding die for an elastic body of an easy-open lid groove of beer packaging. This mold can be called a tooling, and its purpose can be summarized as: using an external driving force to realize material feeding in the easy-open lid groove 11 and to realize extrusion molding or preliminary molding of the elastic body 12.

[0036] It includes a fixing part 3, which includes a fixing flange 31, a feeding pipe 32 and a feeding connector 33 are arranged at the lower part of the fixing flange 31, and a supporting plate 35 is arranged at the center of the fixing flange 31; the feeding connector 33 is connected to an external feeding device, and the external feeding device here is generally a melt extruder;

[0037] A feeding die 6 is provided at the bottom of the feeding tube 32, and the fixing and adjustment method of the feeding die 6 is as follows: an adjustment device is provided in the feeding tube 32 and is connected to the feeding die 6 to realize the adjustment of the material storage gap between the feeding die 6 and the bottom end surface of the feeding tube 32; the above-mentioned adjustment device is an adjustment screw 5, and the threaded section 51 at the bottom end of the adjustment screw 5 is fixed with the threaded hole 62 on the feeding die 6, but it should be noted that when the axial adjustment of the feeding die 6 is realized by the adjustment screw 5, the movement between the adjustment screw 5 and the feeding die 6 is relative. In order to realize the axial drive adjustment of the feeding die 6, the adjustment screw 5 must be constrained to rotate in place. The present invention realizes axial constraint by setting a positioning ring 52 on the adjustment screw 5, and the positioning ring 52 cooperates with the limit plate 41 on the fixed disk 4.

[0038] When the adjusting screw 5 penetrates into the feeding pipe 32, since the feeding pipe 32 is filled with materials in the working state, the joint between the adjusting screw 5 and the fixing flange 31 needs to be sealed to prevent material leakage. The present invention provides a support plate 35 at the top of the feeding pipe 32. The center of the support plate 35 is vertically transparent, and a threaded hole is provided at its edge. The sealing rubber block 8 is fixed by the support plate 35. The sealing rubber block 8 is also provided with a rubber block extension portion 81 that penetrates to the lower part of the support plate 35. The sealing rubber block 8 covers the adjusting screw 5 to achieve sealing when it rotates.

[0039] The present invention provides a support platform 61 at the bottom end of the feeding die 6; a material drop gap is provided between the feeding die 6 and the inner wall of the feeding tube 32, and a material storage gap is provided between the upper end of the support platform 61 and the bottom end surface of the feeding tube 32.

[0040] The above-mentioned material drop gap can be realized by machining a vertical groove 34 on the inner wall of the feed pipe 32, which can be used to guide the material in the feed pipe 32 to the material storage gap. The outer sleeve of the feed pipe 32 is provided with a push pipe 22, and the gap between the push pipe 22 and the feed pipe 32 is 0.05-0.1 mm. This size can facilitate the push pipe 22 to cut the material in a cutting state and push it downward. The push pipe 22 is located at the lower part of the push part 2, and it is integrally arranged with the push flange 21; the push flange 21 is connected to the external drive device.

[0041] The device can feed and shape the elastic body 12 in the easy-open lid groove 11 through the above structure and combination method.

[0042] A method for forming a groove elastic body of an easy-open lid for beer packaging by using the above forming mold specifically comprises the following steps:

[0043] We heat the melt extruder to 140-210°C to melt the TPE material and extrude it into a shape under a pressure of 2-4 MPa;

[0044] Adjust the process, such as Fig.11 As shown in the state, the device realizes the up and down adjustment of the feeding die 6 by screwing the adjustment screw 5. During the adjustment process, in order to prevent the feeding die 6 from radially swinging in the feeding tube 32, three guide protrusions 63 are arranged on the outer wall of the feeding die 6, and an annular material storage gap 65 is formed between the bottom of the guide protrusion 63 and the support platform 61. In this embodiment, the annular material storage gap 65 is formed by removing the material at the junction of the three guide protrusions 63 and the support platform 61, the purpose of which is to enable the material to circle around the support platform 61 for a circle to prevent uneven feeding during annular feeding. Corresponding to the three guide protrusions 63, six vertical grooves 34 are arranged on the inner wall of the feeding tube 32, of which three vertical grooves 34 are matched with the three guide protrusions 63 on the outer diameter of the feeding die 6; the remaining three vertical grooves 34 are used as blanking gaps to realize the downward flow of fluid materials. The vertical grooves 34 used as blanking gaps are arranged at intervals from the vertical grooves 34 with guiding functions.

[0045] During adjustment, in order to prevent the adjustment screw 5 from axially swinging and affecting the adjustment accuracy, the device realizes axial constraint in the following manner: a spring washer 64 is arranged on the top of the feeding die 6, and a circle of pressure spring 7 is arranged around the adjustment screw 5 between the spring washer 64 and the support plate 35. The pressure spring 7 always gives the feeding die 6 a downward thrust to prevent the adjustment screw 5 from deflecting upward.

[0046] On the basis of the above adjustment structure and guide structure, the device also provides a second guide and axial constraint structure, such as Figure 6 , 7As shown in FIG. 10 , three guide posts 67 are arranged on the support platform 61, and three guide holes 36 are correspondingly arranged on the wall of the feed pipe 32. Guide hole springs 9 are arranged in the three guide holes 36; the guide posts 67 are inserted into the guide holes 36 to squeeze the guide hole springs 9. The advantage of this structure is that it can effectively prevent the molten material from affecting the compression performance of the spring.

[0047] The device adjusts the relative position of the feeding die head 6 in the feeding tube 32 to adjust the size of the material storage gap or the annular material storage gap 65 between the feeding die head 6 and the bottom end surface of the feeding tube 32; this adjustment is carried out for different material amounts and is carried out at the initial stage of the production equipment operation. After the debugging is completed, the continuous operation does not require secondary adjustment;

[0048] Feeding process, such as Fig.12 As shown, the external feed connector 33 is fed through a melt extruder, and the fluid material is introduced into the feed pipe 32; the material enters the annular storage gap 65 through three vertical grooves 34 and is temporarily stored on the upper surface of the support table; if the device uses three guide pillars 67 as a guide device, only three vertical grooves 34 are processed in the feed pipe 32 as a fluid flow channel for guiding the material.

[0049] Pushing process, such as Fig.13 , 14 As shown, the feeding time of a single feeding is set by an external control system. When the material in the annular storage gap 65 reaches a certain amount, the pushing tube 22 is pressed down to push the material into the easy-open lid groove 11 and extrude it into shape; the driving force of the pushing tube 22 comes from the pushing flange 21, and the pushing flange 21 is connected to the external driving device.

[0050] The material described in the embodiment of the present invention adopts TPE material, which is a polymer material that shows high elasticity of rubber at room temperature and can be plasticized and formed at high temperature (without vulcanization). TPE is non-toxic, does not contain bisphenol A (BPA), phthalates PAES, polycyclic aromatic hydrocarbons PAHS, and nonylphenol NP, and is a world-recognized standard environmentally friendly material.

[0051] The device and the molding method are ingeniously conceived and can realize one-time precise molding of the elastic body in the easy-open lid. The device realizes the molding of the annular elastomer during feeding and molding, avoiding the disadvantages of uneven thickness and large contact surface with the wine body during sheet molding, reducing production costs and eliminating the hidden dangers of the sealing structure to food safety.

Claims

1. A molding die for the groove elastic body of the beer packaging easy-open lid, Features: It is provided with a fixed part, on which a feeding pipe connected to an external feeding device is provided, a feeding die head is provided at the bottom of the feeding pipe, and a supporting platform is provided at the bottom of the feeding die head; a material drop gap is provided between the feeding die head and the inner wall of the feeding pipe, and a material storage gap is provided between the upper end of the supporting platform and the bottom end surface of the feeding pipe; an adjusting device is provided in the feeding pipe and connected to the feeding die head to adjust the material storage gap between the feeding die head and the bottom end surface of the feeding pipe; a pushing pipe is provided on the outside of the feeding pipe; The adjustment device is an adjustment screw, the threaded section at the bottom end of which is fixedly matched with the threaded hole on the feeding die head, and a positioning ring is arranged on the adjustment screw, and the positioning ring cooperates with the limit plate on the fixed plate to realize axial constraint; A circle of pressure spring is arranged around the adjusting screw between the top of the feeding die head and the support plate at the bottom of the countersunk hole; The support platform is provided with a guide column, the wall of the feed pipe is provided with a guide hole, and a guide hole spring is provided in the guide hole; the guide column is inserted into the guide hole to squeeze the guide hole spring.

2. A forming die for a groove elastic body of an easy-open lid for beer packaging as claimed in claim 1, Features: A fixing flange is arranged at the top of the fixing part, a countersunk hole is arranged on the fixing flange, the adjusting device passes through the countersunk hole and a sealing member is arranged in the countersunk hole.

3. A molding die for the groove elastic body of the beer packaging easy-open lid as claimed in claim 1, Features: The outer diameter of the feeding die head is matched with the inner wall of the feeding pipe in a concave-convex manner; the blanking gap is a vertical groove body processed on the inner wall of the feeding pipe.

4. A forming die for the groove elastic body of the beer packaging easy-open lid as claimed in claim 3, Features: A guide protrusion is arranged on the outer wall of the feeding die head, and an annular material storage gap is formed between the bottom of the guide protrusion and the supporting platform.

5. A forming die for the groove elastic body of the beer packaging easy-open lid as claimed in claim 1, Features: The material in the feed pipe is made of TPE.

6. A molding method using the molding die for the groove elastic body of the beer packaging easy-open lid according to claim 1, Features: It at least includes the following steps: An adjustment process is to adjust the relative position of the feeding die head in the feeding pipe, and the adjustment device drives the feeding die head to adjust the size of the material storage gap between the feeding die head and the bottom end surface of the feeding pipe; In the feeding process, the fluid material is introduced into the feeding pipe through the external feeding device; the material enters the storage gap through the blanking gap and is temporarily stored on the upper surface of the support table; In the pushing process, the feeding time of a single feeding is set through an external control system. When the material in the storage gap reaches a certain amount, the pushing tube is pressed down to push the material into the groove of the easy-open lid and squeeze it into shape.

Images