Die structure capable of quickly adjusting thickness of thin glue position of through hole in top of drinking water bucket cover

Abstract

The utility model provides a die structure capable of quickly adjusting the thickness of a thin glue position of a top through hole of a drinking water bucket cover, the drinking water bucket cover comprises an annular side wall and a top cover, the top cover is provided with the top through hole which is concave downwards, and the hole bottom edge of the top through hole is the thin glue position. The mold structure comprises a rear mold core and a front mold core which are used for forming the annular side wall, and further comprises an ejector rod and an ejector rod end face insert, an inwards-concave insert groove is formed in one end face of the ejector rod, and the ejector rod end face insert is used for being arranged in the insert groove in a replaceable mode to form an ejector rod assembly. The ejector rod assembly is arranged opposite to the top of the front mold core and used for forming the top cover, and the ejector rod end face insert and the front mold core are opposite to form the ejector penetrating hole. According to the utility model, the stability and uniformity of the thickness of the thin glue position of the barrel cover top through hole can be ensured, and the ejector rod end face insert can be conveniently and quickly replaced, so that the requirements of different thicknesses of the thin glue position are met.

Description

Technical Field

[0001] This utility model relates to the field of machinery, specifically to a mold structure for quickly adjusting the thickness of the thin rubber part of the perforation on the top of a drinking water bucket lid. Background Technology

[0002] In the field of disposable bulk drinking water, it is common practice for water bottles to have a perforation in the middle of the cap. The purpose is to make it convenient for consumers to directly install the water bottle onto the water dispenser. The smart column inside the water dispenser passes through the perforation, allowing the water inside the bottle to flow out.

[0003] The design principle of the top-punch cap is as follows: a recessed hole is designed in the center of the top surface of the cap, and a ring-shaped weak connection is set between the bottom surface of the recessed hole and the side wall of the recessed hole. This weak connection is not easily broken when not needed, and it is tightly sealed to prevent water and air leakage. When needed, it is easy to break through to extract water. The weak connection of the top-punch cap is a thin plastic area created by the cooperation of the front mold core and the rear mold ejector pin. During the production process, this thin plastic area may become too thin and leaky or too thick and difficult to break through due to various factors such as mold wear, changes in ambient temperature, and changes in materials. Therefore, the thickness of the thin plastic area needs to be adjusted. However, each adjustment of the thickness of the thin plastic area requires stopping production and disassembling the mold, which is complicated, delays production, and increases costs. In order to adapt to long-term production and various types and models of top-punch caps, a mold structure that is convenient, quick, and easy to adjust the thickness of the thin plastic area at the weak connection of the top-punch cap needs to be designed. Utility Model Content

[0004] In view of the background art, the purpose of this utility model is to provide a mold that can conveniently and cost-effectively adjust the thickness of the thin rubber part of the perforation on the top of a drinking water bottle lid.

[0005] To achieve the intended use, this utility model adopts the following technical solution:

[0006] A mold structure for quickly adjusting the thickness of the thin adhesive portion of the top perforation in a drinking water bottle lid, the drinking water bottle lid including an annular sidewall and a top cover, the top cover having a downwardly recessed top perforation, the bottom edge of the top perforation being the thin adhesive portion, the mold structure including a rear mold core and a front mold core for forming the annular sidewall, and further including a push rod and a push rod end face insert, one end face of the push rod having an inwardly recessed insert groove, the push rod end face insert being replaceably disposed in the insert groove to form a push rod assembly, the push rod assembly being disposed opposite to the top of the front mold core for forming the top cover, wherein the push rod end face insert and the front mold core are opposite to each other to form the top perforation.

[0007] Preferably, the outer end face of the top rod end face insert is provided with a groove that matches the outer wall of the top through hole to be formed, and the top inner wall of the front mold core is provided with a protrusion. The outer end face of the top rod end face insert and the top inner wall of the front mold core are arranged opposite to each other, and the groove and the protrusion are matched to form the top through hole.

[0008] Preferably, the bottom of the groove is provided with a step, so that the diameter of the groove is larger on the outside and smaller on the inside. The end edge of the protrusion of the front mold core is opposite to the step, which is used to form the thin glue position.

[0009] Preferably, the opposite side walls of the insert groove are provided with a first transverse through hole, and the end face insert of the push rod is provided with a second transverse through hole. The first through hole and the second through hole are connected to form a straight through hole. A pin is inserted into the straight through hole to fix the end face insert of the push rod to the push rod.

[0010] Preferably, the fit between the push rod end face insert and the push rod is a fit that connects from a straight surface to an inclined surface: a certain length of the outer side is an inclined surface fit, and the rest is a straight surface fit.

[0011] More preferably, the portion outside the straight through hole is a beveled fit, and the portion inside the straight through hole is a straight fit.

[0012] Preferably, the top rod assembly is disposed within the rear model core.

[0013] Preferably, the front model core is a cap-shaped structure with an opening facing downwards, and the rear model core is annular. The rear model core and the front model core are fitted together to form the annular sidewall.

[0014] Preferably, the rear mold core is a threaded core used to form the internal thread of the side wall of the bucket lid.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] The mold structure of this utility model is applicable to all models and types of drinking water buckets on the market. It can ensure the stability and uniformity of the thickness of the thin rubber part of the top perforation of the bucket lid, so as to be both leak-proof and easy to break through. It can also make it easy and quick to replace the end face insert of the ejector rod, thereby adapting to the needs of different thin rubber parts, reducing mold repair time and reducing costs.

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model;

[0019] Figure 2 This is an exploded structural diagram of an embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram illustrating the replacement principle of the top rod end face insert in an embodiment of this utility model. Detailed Implementation

[0021] This embodiment provides a mold structure for quickly adjusting the thickness of the thin rubber portion of the perforation on the top of a drinking water bottle lid. For example... Figure 2 As shown, the drinking water bottle lid consists of an annular side wall 1 and a top cover 2. The top cover 2 has a downward-recessed top perforation 3 in the center. The bottom edge of the top perforation 3 is provided with a thin rubber part 4, which is convenient to be pierced during use, so that the entire top perforation 3 can be separated from the top cover 2, thereby allowing drinking water to flow out or be sucked out.

[0022] like Figures 1 to 3 As shown, the mold structure of this embodiment includes a rear mold core 10, a front mold core 20, an ejector pin 30, and an ejector pin end face insert 40. The rear mold core 10 is an annular cylindrical shape, and the front mold core 20 is a cap shape. One end of the rear mold core 10 is inserted into the front mold core 20 from back to front, forming an annular sidewall 1 between the two. The ejector pin 30 is generally cylindrical, and its front end face has an inwardly recessed cylindrical insert groove 31. The ejector pin end face insert 40 is a matching cylindrical shape, used to be installed into the insert groove 31, and together with the ejector pin end face insert 40, forms an ejector pin assembly. The ejector pin assembly is inserted from the rear end of the rear mold core 10 and is positioned opposite the top of the front mold core 20 to form the top cover 2.

[0023] Specifically, the front end face of the top rod end face insert 40 is provided with a groove 41 that matches the outer wall of the top through hole 3 to be formed. Correspondingly, the top inner wall of the front model core 20 is provided with a protrusion 21. The outer end face of the top rod end face insert 41 and the top inner wall of the front model core 20 are arranged opposite to each other. The groove 41 and the protrusion 21 are matched to form the top through hole 3.

[0024] More specifically, the bottom of the groove 41 is provided with a step 42, which divides the groove 41 into two parts: the part from the bottom of the groove 41 to the step 42 has a smaller diameter, and the part from the step 42 to the port of the groove 41 has a larger diameter. The end edge of the protrusion 21 of the front mold core 20 is opposite to the edge of the step 42, which is used to form the thin glue position 4.

[0025] The insert groove 31 of the push rod 30 has a first transverse through hole 32 on its opposite side walls. Correspondingly, the insert 40 on the end face of the push rod has a second transverse through hole 43. The first through hole 32 and the second through hole 43 are connected to form a straight through hole. A pin 50 is inserted into the straight through hole to fix the insert 40 on the end face of the push rod to the push rod 30.

[0026] The fit between the push rod end face insert 40 and the push rod 30 is a transition from a straight surface to an inclined surface: the outer diameter of the push rod end face insert 40 gradually decreases from the end with the groove 41 to the second through hole 42, forming an inclined surface; from the second through hole 42 to the other end of the push rod end face insert 40, the outer diameter remains unchanged, forming a straight surface. Correspondingly, the insert groove 31 has a matching shape to facilitate the insertion of the push rod end face insert 40. In use, the straight surface fit makes the push rod end face insert 40 easy to position and quickly removed and inserted, while the inclined surface fit ensures a tight fit between the insert and the push rod 30, accurate positioning, and a flat end face.

[0027] Preferably, the top rod 30 and the rear model core 10 are fitted with a straight front end and a suspended rear end without fitting, which facilitates the top rod 30 to push out the insert 40. The top rod 30 has the same outer diameter and its outer wall is a straight surface. The inner diameter of a section of the front end of the rear model core 10 is smaller and is also a straight surface. This section of the rear model core 10 is in contact with the top rod 30. The inner diameter of the rest of the rear model core 10 is larger, so there is a gap between this section and the top rod 30, and it is suspended without fitting.

[0028] Preferably, the inner wall of the annular sidewall 1 is threaded. Therefore, the rear model core 10 is a threaded core with threads on its outer wall, which is used to form the inner wall thread of the annular sidewall 1 when it forms with the front model core 20.

[0029] In this embodiment, the ejector end face insert 40 is connected to the front end of the ejector 30 by a pin 50. When it is necessary to repair or change the thickness of the thin rubber part 4 of the top through hole 3, it is not necessary to disassemble the entire mold. Just push out the ejector 30 and pull out the pin 50 to quickly replace the ejector end face insert 40.

[0030] With the dimensions of the protrusion 21 of the front mold core 120 remaining unchanged, multiple replacement parts can be made according to the diameter of the edge of the step 42 of the push rod end face insert 40. When a thicker thin glue position 4 is needed for the through hole 3, a push rod end face insert 40 with a larger diameter is used; conversely, a push rod end face insert 40 with a smaller diameter is used. Therefore, the thickness of the thin glue position 4 can be adjusted conveniently and quickly. A thicker thin glue position 4 results in a greater through force, and vice versa, thus adjusting the through force. The principle is that the structure of the thin glue position 4 is generated by the parallel misalignment of the end corner of the protrusion 21 of the front mold core 20 with the step 42 at the bottom of the groove 41 of the push rod end face insert 40. With the dimensions of the protrusion 21 of the front mold core 20 remaining unchanged, an increase in the diameter of the edge of the step 42 leads to a thicker thin glue position, and a decrease in the diameter of the edge of the step 42 leads to a thinner thin glue position. Therefore, the thickness of the thin glue position can be adjusted as needed.

[0031] The above description is merely a preferred embodiment of the utility model and is not intended to limit the utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the utility model shall still fall within the scope of the technical solution of the utility model.

Claims

1. A mold structure for quickly adjusting the thickness of the thin adhesive portion of the top perforation in a drinking water bottle lid, the drinking water bottle lid comprising an annular sidewall and a top cover, the top cover having a downwardly recessed top perforation, the bottom edge of the top perforation being the thin adhesive portion, characterized in that, The mold structure includes a rear mold core and a front mold core for forming the annular sidewall, and also includes a push rod and a push rod end face insert. One end face of the push rod is provided with an inwardly recessed insert groove. The push rod end face insert is used to replaceably set in the insert groove to form a push rod assembly. The push rod assembly is disposed opposite to the top of the front mold core to form the top cover. The push rod end face insert and the front mold core are opposite to form the top through hole.

2. The mold structure according to claim 1, characterized in that, The outer end face of the top rod end face insert is provided with a groove that matches the outer wall of the top through hole to be formed. The top inner wall of the front mold core is provided with a protrusion. The outer end face of the top rod end face insert and the top inner wall of the front mold core are arranged opposite to each other. The groove and the protrusion are matched to form the top through hole.

3. The mold structure according to claim 2, characterized in that, The bottom of the groove is provided with a step, so that the diameter of the groove is larger on the outside and smaller on the inside. The end edge of the protrusion of the front mold core is opposite to the step, which is used to form the thin glue position.

4. The mold structure according to any one of claims 1 to 3, characterized in that, The two opposite side walls of the insert groove are provided with a first transverse through hole, and the end face insert of the top rod is provided with a second transverse through hole. The first through hole and the second through hole are connected to form a straight through hole. A pin is inserted into the straight through hole to fix the end face insert of the top rod to the top rod.

5. The mold structure according to any one of claims 1 to 3, characterized in that, The fit between the top rod end face insert and the top rod is a fit that connects from a straight surface to an inclined surface: a certain length of the outer side is an inclined surface fit, and the rest is a straight surface fit. The diameter of the top rod end face insert in the inclined surface fit is larger than the diameter of the top rod end face insert in the straight surface fit.

6. The mold structure according to claim 1, characterized in that, The top rod assembly is located inside the rear model core.

7. The mold structure according to claim 6, characterized in that, The front model core is a cap-shaped structure with an opening facing downwards, and the rear model core is an annular shape. The rear model core and the front model core are fitted together to form the annular sidewall.

8. The mold structure according to claim 7, characterized in that, The rear mold core is a threaded core used to form the internal thread of the side wall of the bucket lid.

9. The mold structure according to claim 1, characterized in that, The top rod and the rear model core are fitted together such that a certain length of the part at one end of the insert groove is a straight fit, while the rest of the part has a gap and is suspended without a fit.

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