Vulcanization forming device for sealing cover

Abstract

The utility model relates to the field of vulcanization product forming, in particular to a sealing cover vulcanization forming device which comprises an upper die plate and a lower die plate, an insert is embedded below the upper die plate, and the lower end of the insert protrudes out of the upper die plate to form a mold core. A product groove is formed in the upper end of the lower mold plate, and during mold closing, the mold core extends into the product groove to form a mold cavity; the mold core is arranged in the middle of the insert and directly forms a step with the insert, and the edge of the step is in lap joint with the upper end face of the lower mold plate during mold closing. During mold closing, the mold core downwards extrudes the silica gel strip, so that the silica gel flows in the product groove to fill the mold cavity; wherein a part of the silica gel flows into the abdicating groove, and the air which is not exhausted in time is extruded into the abdicating groove while flowing, so that the generation of bubbles after forming is avoided; a part of the silica gel flows towards the first overflow groove, and if redundant silica gel exists, the silica gel continues to flow towards the second overflow groove and the third overflow groove.

Description

Technical Field

[0001] The utility model relates to the technical field of vulcanized product molding, and particularly relates to a vulcanization molding device for a sealing cover. Background Art

[0002] In fields such as medical treatment and chemistry, it is very common to connect containers such as bottles and cans with conduits. Sealing is required during connection, and silicone sealing covers are widely used because of their good sealing performance and easy installation. The production of traditional sealing covers mostly uses injection molds. Relatively speaking, the structure of injection molds is more complex, and the injection equipment used in conjunction with them is relatively expensive, which is not conducive to cost control of enterprises.

[0003] In the prior art, there are also those using flat vulcanization molds for production. However, in production, problems such as material shortage, many burrs on the edge and difficulty in cleaning often occur. Therefore, the utility model has developed a vulcanization molding device for a sealing cover to solve the problems existing in the prior art. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a vulcanization molding device for a sealing cover to solve problems such as many burrs and difficulty in cleaning in the prior art.

[0005] The technical solution of the utility model is: a vulcanization molding device for a sealing cover, including an upper template and a lower template. A insert block is embedded below the upper template, and the lower end of the insert block protrudes from the upper template to form a core. A product groove is arranged at the upper end of the lower template. When the mold is closed, the core extends into the product groove to form a cavity.

[0006] The core is arranged at the center of the insert block and directly forms a step with the insert block. When the mold is closed, the edge of the step overlaps on the upper end surface of the lower template.

[0007] Preferably, a first overflow groove, a second overflow groove and a third overflow groove are arranged on the lower end surface of the upper template. The first overflow groove surrounds the insert block, the second overflow groove surrounds the first overflow groove, and the third overflow groove surrounds the second overflow groove.

[0008] Preferably, when the mold is closed, the distance between the first overflow groove and the lower template is greater than the distance between the second overflow groove and the lower template.

[0009] Preferably, a protrusion is formed between the second overflow groove and the third overflow groove. When the mold is closed, a first gap is formed between the protrusion and the lower template, and the first gap is smaller than the distance between the second overflow groove and the lower template.

[0010] Preferably, a boss is arranged at the center of the bottom of the product groove, and a relief groove is arranged at the center of the lower end of the core. When the mold is closed, the lower end surface of the core near the relief groove overlaps on the upper end surface of the boss.

[0011] Preferably, a plurality of inserts are provided on the upper template, and a plurality of product slots are provided on the corresponding lower template.

[0012] Preferably, the second overflow groove surrounds a plurality of first overflow grooves simultaneously.

[0013] Compared with the prior art, the advantages of the utility model are:

[0014] (1) In the present invention, when the mold is closed, the core squeezes the silicone strip downward, so that the silicone flows in the product groove to fill the cavity; wherein, a portion of the silicone flows into the give-way groove, and while flowing, the air that cannot be discharged in time is squeezed into the give-way groove, thereby avoiding the generation of bubbles after molding; a portion of the silicone flows into the first overflow groove, and if there is any excess silicone, it continues to flow into the second overflow groove and the third overflow groove;

[0015] By setting the depth of the first overflow groove to be greater than the depth of the second overflow groove, and the depth of the second overflow groove to be greater than the depth of the first gap, during the mold closing process, the flow capacity of the silicone rubber to the outside of the cavity is gradually reduced, the pressure of the silicone rubber in the cavity is increased, and the bubbles are further discharged to avoid the occurrence of material shortage;

[0016] (2) When the mold is closed, the edge of the step overlaps the upper end surface of the lower mold plate and the lower end surface of the core overlaps the upper end surface of the boss near the make-away groove. After the mold is closed, the connection between the sealing cover product and the excess silicone is cut off or thinned to avoid the generation of burrs or the burrs can be directly torn off, making burr removal more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0018] Figure 1 This is a schematic diagram of the structure of the sealing cover vulcanization molding device of the utility model;

[0019] Figure 2 It is a schematic diagram of the top view of the structure of the sealing cover vulcanization molding device of the utility model;

[0020] Figure 3 for Figure 2 Schematic diagram of the structure at AA in the middle;

[0021] Figure 4 for Figure 3 The enlarged structural diagram at B in the middle;

[0022] Figure 5 It is a structural schematic diagram of the upper template of the utility model;

[0023] Figure 6 It is a structural schematic diagram of the lower template described in the utility model.

[0024] Wherein: upper template 1, insert block 11, step 111, core 12, relief groove 121, first overflow groove 13, second overflow groove 14, third overflow groove 15, protrusion 16, first gap 161;

[0025] Lower template 2, product groove 21, boss 211;

[0026] Cavity 3. Specific implementation mode

[0027] The following combines specific embodiments to further elaborate on the content of the present utility model:

[0028] As Figures 1-6 shown, the present utility model is applied to the manufacture of a sealing cap. The sealing cap is integrally cylindrical and has a through hole at the bottom. When in use, the sealing cap is buckled at the outlet of a bottle, a can, etc., and only the through hole of the conduit is inserted, realizing the sealed connection between the container such as a bottle or a can and the conduit. In the present utility model, a flat vulcanizing mold is used for the vulcanization molding of the sealing cap. The raw material is solid silica gel. During vulcanization molding, the solid silica gel cut into strips is placed at the product groove on the upper section of the lower template; the upper template moves downward under the drive of a vulcanizing device to close the mold with the lower template. The solid silica gel flows under the extrusion of the upper template and fills the cavity; then it is heated and vulcanized to make the sealing cap solidify and form. When opening the mold, the upper template moves upward, and the sealing cap product moves with the upper template and disengages from the product groove. The operator or the robotic arm can take out the product from the core. Specifically:

[0029] A sealing cap vulcanization molding device includes an upper template 1 and a lower template 2. An insert block 11 is embedded below the upper template 1, and the lower end of the insert block 11 protrudes from the upper template 1 to form a core 12; a product groove 21 is provided at the upper end of the lower template 2. When closing the mold, the core 12 extends into the product groove 21 to form a cavity 3. Among them, there are multiple insert blocks 11 on the upper template 1, and correspondingly, there are multiple product grooves 21 on the lower template 2.

[0030] A first overflow groove 13, a second overflow groove 14, and a third overflow groove 15 are provided on the lower end surface of the upper template 1. The first overflow groove 13 surrounds the insert block 11, the second overflow groove 14 surrounds the first overflow groove 13, and the third overflow groove 15 surrounds the second overflow groove 14. When there are multiple insert blocks 11, the second overflow groove 14 simultaneously surrounds multiple first overflow grooves 13, and the third overflow groove 15 can surround one second overflow groove 14 or can simultaneously surround multiple second overflow grooves 14.

[0031] In this embodiment, a protrusion 16 is formed between the second overflow groove 14 and the third overflow groove 15. When the mold is closed, the distance between the first overflow groove 13 and the lower template 2 is greater than the distance between the second overflow groove 14 and the lower template 2. A first gap 161 is formed between the protrusion 16 and the lower template 2, and the first gap 161 is smaller than the distance between the second overflow groove 14 and the lower template 2. With this structure, during the mold closing process, the ability of the silicone in the cavity 3 to flow outwards gradually decreases, and the pressure in the cavity 3 gradually increases. If there are bubbles in the cavity 3, they can be squeezed out in time. In addition, the space of the third overflow groove 15 can be set larger, so that the excess silicone has enough space to be accommodated, avoiding flowing between the upper and lower templates 2 and affecting the mold closing accuracy.

[0032] The core 12 is arranged at the center of the insert 11 and directly forms a step 111 with the insert 11. When the mold is closed, the edge of the step 111 overlaps the upper end surface of the lower template 2. A boss 211 is arranged at the center of the bottom of the product groove 21, and a relief groove 121 is arranged at the center of the lower end of the core 12. When the mold is closed, the lower end surface of the core 12 near the relief groove 121 overlaps the upper end surface of the boss 211.

[0033] In this embodiment, when the mold is closed, at the overlapping part of the step 111 and the lower template 2, and at the overlapping part of the lower end surface of the core 12 and the relief groove 121, the connection between the product and the excess silicone can be cut off, avoiding the generation of burrs after molding. Of course, in actual production, affected by factors such as precision control, when the mold is closed, it cannot be guaranteed that the overlapping parts mentioned above can be completely in contact and connected. However, it can also greatly thin or reduce the connection between the product and the excess silicone material. After the product is demolded and taken out, the operator can directly tear off the burrs.

[0034] It should be noted that in this embodiment, guide post, guide sleeve and other guiding and positioning devices, heating devices and other structures are arranged on the upper template and the lower template to ensure the normal or stable operation of the flat vulcanizing mold. These are all prior arts and will not be elaborated in this embodiment.

[0035] The above embodiments are only used to illustrate the technical concept and characteristics of the present invention, and their purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and cannot be used to limit the protection scope of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention.

Claims

1. A vulcanization molding device for a sealing cover, characterized in that: It includes an upper template and a lower template. A insert block is embedded below the upper template, and the lower end of the insert block protrudes from the upper template to form a core. A product groove is provided at the upper end of the lower template. When the mold is closed, the core extends into the product groove to form a cavity. The core is arranged at the center of the insert block and directly forms a step with the insert block. When the mold is closed, the edge of the step overlaps on the upper end face of the lower template.

2. A vulcanization molding device for a sealing cover according to claim 1, characterized in that: A first overflow groove, a second overflow groove and a third overflow groove are provided on the lower end face of the upper template. The first overflow groove surrounds the insert block, the second overflow groove surrounds the first overflow groove, and the third overflow groove surrounds the second overflow groove.

3. A vulcanization molding device for a sealing cover according to claim 2, characterized in that: When the mold is closed, the distance between the first overflow groove and the lower template is greater than the distance between the second overflow groove and the lower template.

4. A vulcanization molding device for a sealing cover according to claim 3, characterized in that: A protrusion is formed between the second overflow groove and the third overflow groove. When the mold is closed, a first gap is formed between the protrusion and the lower template, and the first gap is smaller than the distance between the second overflow groove and the lower template.

5. A vulcanization molding device for a sealing cover according to claim 1, characterized in that: A boss is provided at the center of the bottom of the product groove, and a relief groove is provided at the center of the lower end of the core. When the mold is closed, the lower end face of the core near the relief groove overlaps on the upper end face of the boss.

6. A vulcanization molding device for a sealing cover according to claim 4, characterized in that: There are multiple insert blocks on the upper template, and correspondingly, there are multiple product grooves on the lower template.

7. A vulcanization molding device for a sealing cover according to claim 6, characterized in that: The second overflow groove surrounds multiple first overflow grooves at the same time.

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