Full-automatic rubber mold with inward delayed core pulling function and demolding method of full-automatic rubber mold

Abstract

The invention provides a full-automatic rubber mold with an inward delayed core pulling function and a demolding method of the full-automatic rubber mold. The full-automatic rubber mold with the inward delayed core pulling function comprises a lower mold body, a middle mold body and an upper mold body which are sequentially laid in a layered mode, the middle mold body is provided with a delayed pulling plate, the induction end of the delayed pulling plate is connected with the upper mold body, and the action end of the delayed pulling plate is connected with the lower mold body; and one or more groups of core-pulling demolding mechanisms are arranged among the lower mold, the middle mold and the upper mold. The demolding method of the full-automatic rubber mold with the inward delayed core pulling function comprises the steps of upper mold ascending, delayed pulling plate unlocking, middle mold ascending, insert folding and the like. According to the full-automatic rubber mold with the inward delayed core pulling function and the demolding method of the full-automatic rubber mold, the problem that an outer side core pulling scheme is adopted in an existing mold, and the production requirement of a specific product is difficult to meet is solved.

Description

Technical Field

[0001] The invention relates to the field of molds, and in particular to a fully automatic rubber mold with inward delayed core pulling and a demoulding method thereof. Background Art

[0002] The appearance of rubber products has high requirements, but they are tightly attached to the mold core and have a fold line matching surface, so when opening the mold to take out the rubber products, they often warp, get scratched on the surface, and are difficult to take out. This requires the use of a lateral core pulling mechanism to separate the core from the product when demolding and taking out the product, avoiding surface damage to the product and the phenomenon of getting stuck and difficult to take out.

[0003] There is a rubber product such as Figure 1 As shown, the product is made of pure rubber, with a rectangular shell structure as a whole, and multiple raised slots are arranged on the vertical inner wall. When demoulding, the core must be pulled out of the product cavity to avoid the raised slots, and then the product is demoulded and removed in the up and down directions.

[0004] Existing lateral core pulling mechanisms include manual, hydraulic cylinder or inclined guide column core pulling. The manual core pulling mechanism requires the operator to use a crowbar to open the slider to take out the product, which is labor-intensive and extremely inefficient; the hydraulic cylinder core pulling mechanism can achieve an efficient core pulling process, but it is often limited by the mold space and cannot be installed. The mold structure is complex, large in size, and high in cost.

[0005] Regarding the solution of core pulling using inclined guide pins, the existing application numbers are "202011179562.9", "202310006804.1", and "202110855233.X". The applicants are all patents of "Zhuzhou Times New Materials Technology Co., Ltd.". The disclosed solutions are only suitable for outward core pulling of molds for products with simpler structures, which is difficult to meet the production needs of the above-mentioned products.

[0006] Regarding the solution of core pulling by inclined guide pins, there are also patents with application numbers "200920197595.9", "201420542045.7", and "201721728049.4", and the applicants are "Binhai Mould Group Co., Ltd.", "Golden Star" and other units or individuals. The disclosed solutions also use core pulling to the outside, which is difficult to meet the production needs of the above-mentioned products. Summary of the invention

[0007] In order to solve the problem that the existing molds all adopt the outer core pulling solution and are difficult to meet the production requirements of specific products, the present invention provides a fully automatic rubber mold with inward delayed core pulling and a demoulding method thereof to solve the above problem.

[0008] A fully automatic rubber mold with inward delayed core pulling comprises a lower mold, a middle mold and an upper mold which are arranged in sequence, the middle mold being provided with a delayed pull plate, the sensing end of the delayed pull plate being connected to the upper mold, and the action end being connected to the lower mold; one or more sets of core pulling and demolding mechanisms are provided between the lower mold, the middle mold and the upper mold, the core pulling and demolding mechanisms comprising an intermediate mold core provided on the lower mold and a plurality of inserts arranged around the intermediate mold core, the inserts being connected to the intermediate mold core via guide columns, and being connected to the middle mold via guide grooves; the guide columns are fixed to the lower mold, and obliquely extend toward the upper mold direction and the inner side of the intermediate mold core, and the guide grooves extend toward the inner side of the intermediate mold core.

[0009] In a preferred embodiment of the fully automatic rubber mold with inward delayed core pulling provided by the present invention, the lower mold is provided with a stop pin connected to the middle mold to provide a stop when the middle mold reaches the limit position, and the middle mold is provided with a guide column connected to the upper mold. The middle mold extends outwardly with one or more wing plates.

[0010] In a preferred embodiment of the fully automatic rubber mold with inward delayed core pulling provided by the present invention, the intermediate mold core passes through the middle mold into the upper mold, and the upper position of the side surface is an inclined surface that shrinks upward and inward; a plurality of guide columns are provided along the inclined surface, and are correspondingly connected to a plurality of inserts, and the lower ends of the guide columns are fixed to the lower mold.

[0011] In a preferred embodiment of the fully automatic rubber mold with inward delayed core pulling provided by the present invention, the middle mold is located at a lower position on the side of the intermediate mold core, the bottom of the insert extends outward and is connected to the middle mold through a guide groove; the inner side of the insert is an inclined surface parallel to the intermediate mold core, and is connected to the guide column at the inclined surface position.

[0012] In a preferred embodiment of the fully automatic rubber mold with inward delayed core pulling provided by the present invention, the inserts include two long inserts respectively arranged at the long sides of the middle mold core, two short inserts respectively arranged at the short sides of the two ends of the middle mold core, and four corner inserts respectively arranged at the four corners of the middle mold core. The long inserts and the short inserts are connected to the guide column with a small gap, and the corner inserts are connected to the guide column with a large gap.

[0013] The demoulding method of the fully automatic rubber mold with inward delayed core pulling includes: Step 1, the upper die is controlled to rise, the middle die is fixed by locking the lower die with the delayed pull plate, and only the upper die is separated from the middle die; Step 2: When the upper die rises to the sensing end position of the delayed pull plate, the action end of the delayed pull plate is activated to unlock the middle die and the lower die; Step 3, controlling the middle mold to rise and separate from the lower mold; Step 4: During the rising process of the middle mold, the insert is driven to rise through the guide groove, and the insert moves inward along the guide column while rising.

[0014] In a preferred embodiment of the fully automatic demoulding method for rubber molds with delayed inward core pulling provided by the present invention, in step 1, the product is filled between the upper mold, the insert and the middle mold core; the upper mold is controlled to rise, the middle mold is locked and fixed with the lower mold by the delayed pull plate, the upper mold is separated from the outer wall of the product, and the inner wall of the product continues to cover the insert and the middle mold core; Step 2: When the upper die rises to the sensing end position of the delayed pull plate, the action end of the delayed pull plate is activated to unlock the middle die and the lower die; Step 3: Control the middle mold to rise, drive the product to rise together, separate the middle mold from the lower mold, and separate the middle area of ​​the bottom of the product from the middle mold core; Step 4: During the rising process of the middle mold, the insert is driven to rise through the guide groove. While the insert rises, it moves inward along the guide column and separates from the inner wall of the product.

[0015] In a preferred embodiment of the fully automatic rubber mold demolding method with inward delayed core pulling provided by the present invention, by adjusting the gap between the insert and the guide column, the insert located on the side of the middle mold core is first moved and separated from the product during the rising process of the middle mold, and then the inserts located at the four corners of the middle mold core are moved and separated from the product.

[0016] Compared with the prior art, the fully automatic rubber mold with delayed inward core pulling and the demoulding method thereof provided by the present invention have the following beneficial effects: 1. The mold provided by the present invention is provided with eight inserts, and the core is pulled inward to avoid the protrusion of the inner wall. The stroke of each insert meets the core pulling displacement requirement to avoid damage to the product when it is ejected from the mold.

[0017] 2. The mold provided by the present invention is provided with a delayed plate pulling mechanism, which unlocks the middle mold and the lower mold only after the upper mold rises for a period of time, delays the parting, and ensures the parting order of the parting surface.

[0018] 3. The mold provided by the present invention is provided with guide pins and stop pins to limit the core pulling stroke, ensure the lifting direction, and prevent the inclined guide pin from being completely pulled out of the insert due to excessive stroke.

[0019] 4. The mold provided by the present invention realizes the delayed core pulling between the inserts, effectively ensures the sequence of core pulling in a limited cavity, has a simple structure and low cost.

[0020] 5. The mold provided by the present invention is installed on the upper and lower hot plates of the vulcanizing machine, and the vulcanizing machine is used to realize full-automatic demoulding, thereby reducing labor intensity and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the structure of the target rubber product; Figure 2 It is a structural schematic diagram of a fully automatic rubber mold with inward delayed core pulling; Figure 3 yes Figure 2 Schematic diagram of the structure of removing the upper mold; Figure 4 yes Figure 3 A longitudinal section of Figure 5 yes Figure 3 Cross-sectional view of .

[0022] Numbers in the figure: upper mold 1, middle mold 2, wing plate 21, guide groove 22, insert 23, long insert 231, short insert 232, corner insert 233, lower mold 3, middle mold core 31, guide column 32, guide column 4, stop pin 5, delayed pull plate 6. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] Please also see Figures 2 to 5 , respectively, are a structural schematic diagram of the fully automatic rubber mold with inward delayed core pulling provided by the present invention, a structural schematic diagram of removing the upper mold, and a longitudinal section view and a cross-sectional view when the upper mold is removed.

[0025] The fully automatic rubber mold with inward delayed core pulling is composed of a lower mold 3, a middle mold 2 and an upper mold 1 from bottom to top. A plurality of guide pins 4 are vertically arranged at the top edge of the middle mold 2, connected with the upper mold 1, and restricting the upper mold 1 to move up and down only relative to the middle mold 2. Similarly, a plurality of stop pins 5 are vertically arranged at the top edge of the lower mold 3, which, on the one hand, restrict the middle mold 2 to move up and down only relative to the lower mold 3, and on the other hand, restrict the maximum lifting height of the middle mold 2.

[0026] A time-delay pull plate 6 is also provided on the outside of the middle mold 2, whose sensing end is connected to the upper mold 1 and whose action end is connected to the lower mold 3. The working principle of the time-delay pull plate 6 is that there is a certain pre-tension stroke at the sensing end, and the sensing end is triggered after the upper mold 1 moves through the pre-tension stroke, so that the action end is unlocked, that is, the middle mold 2 and the lower mold 3 are unlocked. On the contrary, when the upper mold 1, the middle mold 2 and the lower mold 3 all fall back to their original positions, the upper mold 1 is separated from the sensing end, and the middle mold 2 is locked with the lower mold 3 again. Two wing plates 21 are also provided on the outside of the middle mold 2 to facilitate lifting the middle mold 2 when demoulding.

[0027] Three middle mold cores 31 are arranged on the top surface of the lower mold 3. The upper side of the middle mold core 31 is an inclined surface that shrinks upward and inward. Guide pillars 32 are arranged along the inclined surface at the four sides and four corners of the middle mold core 31. The guide pillars 32 are also inclined upward and inward, and are not inclined to the left or right or front and back. Two guide pillars 32 are arranged along the long sides of the middle mold core 31, one guide pillar 32 is arranged along the short sides, and one guide pillar 32 is arranged at each of the four corners.

[0028] The middle mold 2 is provided with three through holes for the middle mold core 31 to pass through. A guide groove 22 is provided at the inner side of the through hole at a position corresponding to each guide column 32.

[0029] Eight inserts 23 are provided between the middle mold 2 and the middle mold core 31 , including two long inserts 231 located at the long side of the middle mold core 31 , two short inserts 232 located at the short side of the middle mold core 31 , and four corner inserts 233 located at the four corners of the middle mold core 31 .

[0030] The inner sides of the inserts 23 are connected to the guide posts 32 at the corresponding positions, and the outer sides are connected to the guide grooves 22 at the corresponding positions. There are large gaps between the four guide posts 32 at the four corners and the four corner inserts 233, and there are small gaps between the six guide posts 32 at the four sides and the long inserts 231 and the short inserts 232.

[0031] In the initial position, the top surface of the insert 23 is flush with the top surface of the middle mold core 31, and the adjacent inserts 23 are filled with each other. The middle mold core 31 and the insert 23 together constitute the inner mold of the product, and the upper mold 1 serves as the outer mold of the product to form a rubber product mold.

[0032] The upper mold 1 and the lower mold 3 are respectively fixed to the upper and lower hot plates of the vulcanizer by bolts. After the processing is completed, the product is filled between the upper mold 1, the insert 23 and the middle mold core 31, and then the fully automatic rubber mold demoulding method with inward delayed core pulling is started, including: Step 1: The hot plate on the vulcanizing machine rises to lift the upper mold 1.

[0033] Since the lower mold 3 is fixed to the lower hot plate of the vulcanizer, and the middle mold 2 is fixed to the lower mold 3 through the delayed pull plate 6, only the upper mold 1 is lifted. The product is still fixed on the insert 23 and the middle mold core 31. As the upper mold 1 is lifted, the upper mold 1 is separated from the outer wall of the product.

[0034] Step 2: During the ascending process of the upper mold 1, the sensing end is triggered after the pre-pulling stroke of the delayed pull plate 6, so that the action end is unlocked, that is, the middle mold 2 and the lower mold 3 are unlocked.

[0035] Step 3: Lift the demoulding frame of the machine, and drive the wing plate 21 to make the middle mold 2 rise.

[0036] During the rising process of the middle mold 2, the guide groove 22, the insert 23 and the product are successively driven to rise together, so that the middle mold core 31 is separated from the bottom area inside the product.

[0037] Step 4: During the rising process of the middle mold 2, the insert 23 is driven to rise through the guide groove 22. There is a small gap between the six guide pillars 32 located at the four sides and the long insert 231 and the short insert 232. Therefore, during the rising process, the long insert 231 and the short insert 232 quickly fit with the corresponding guide pillars 32, and move inward with the guide pillars 32 and separate from the inner wall of the product.

[0038] Step 5: During the rising process of the middle mold 2, the insert 23 is driven to rise through the guide groove 22. There is a large gap between the four guide pillars 32 at the four corners and the corner inserts 233. Therefore, during the rising process, the corner inserts 233 have a short idle stroke, and then fit with the corresponding guide pillars 32, and move inward with the guide pillars 32 and separate from the inner wall of the product.

[0039] At this point, the upper mold 1, the insert 23 and the middle mold core 31 are separated from the product.

[0040] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A fully automatic rubber mold with delayed inward core pulling, characterized by: It comprises a lower mould, a middle mould and an upper mould which are sequentially laid out in layers, the middle mould is provided with a time-delay pull plate, the sensing end of the time-delay pull plate is connected with the upper mould, and the action end is connected with the lower mould; one or more sets of core-pulling demoulding mechanisms are arranged between the lower mould, the middle mould and the upper mould, the core-pulling demoulding mechanisms comprise an intermediate mould core arranged on the lower mould and a plurality of inserts arranged around the intermediate mould core, the inserts are connected with the intermediate mould core through guide columns, and are connected with the middle mould through guide grooves; the guide columns are fixed to the lower mould, and extend obliquely towards the upper mould direction and the inner side of the intermediate mould core, and the guide grooves extend towards the inner side of the intermediate mould core.

2. The fully automatic rubber mold with inward delayed core pulling according to claim 1 is characterized in that: The lower die is provided with a stop pin connected with the middle die to provide a stop when the middle die reaches the limit position. The middle die is provided with a guide column connected with the upper die.

3. The fully automatic rubber mold with inward delayed core pulling according to claim 1 is characterized in that: The middle mold has one or more wing plates extending outward.

4. The fully automatic rubber mold with delayed inward core pulling according to any one of claims 1 to 3, characterized in that: The intermediate mold core passes through the middle mold into the upper mold, and the upper side is an inclined surface that contracts upward and inward; a plurality of guide columns are arranged along the inclined surface and correspondingly connected to a plurality of inserts, and the lower end of the guide column is fixed to the lower mold.

5. The fully automatic rubber mold with inward delayed core pulling according to claim 4 is characterized in that: The middle mold is located at a lower position on the side of the middle mold core, and the bottom of the insert extends outward and is connected to the middle mold through a guide groove; the inner side of the insert is an inclined surface parallel to the middle mold core, and is connected to the guide column at the inclined surface position.

6. The fully automatic rubber mold with delayed inward core pulling according to claim 5, characterized in that: The inserts include two long inserts respectively arranged at the long sides of both sides of the middle mold core, two short inserts respectively arranged at the short sides at both ends of the middle mold core, and four corner inserts respectively arranged at the four corners of the middle mold core.

7. The fully automatic rubber mold with inward delayed core pulling according to claim 6 is characterized in that: The long insert and the short insert are connected with the guide column with a small gap, and the corner insert is connected with the guide column with a large gap.

8. A demoulding method for a fully automatic rubber mold with inward delayed core pulling according to any one of claims 1 to 7, characterized in that: include: Step 1, the upper die is controlled to rise, the middle die is fixed by locking the lower die with the delayed pull plate, and only the upper die is separated from the middle die; Step 2: When the upper die rises to the sensing end position of the delayed pull plate, the action end of the delayed pull plate is activated to unlock the middle die and the lower die; Step 3, controlling the middle mold to rise and separate from the lower mold; Step 4: During the rising process of the middle mold, the insert is driven to rise through the guide groove, and the insert moves inward along the guide column while rising.

9. The demoulding method of a fully automatic rubber mold with inward delayed core pulling according to claim 8, characterized in that: Step 1: The product is filled between the upper mold, the insert and the middle mold core; the upper mold is controlled to rise, the middle mold is fixed by locking the lower mold with the delayed pull plate, the upper mold is separated from the outer wall of the product, and the inner wall of the product continues to cover the insert and the middle mold core; Step 2: When the upper die rises to the sensing end position of the delayed pull plate, the action end of the delayed pull plate is activated to unlock the middle die and the lower die; Step 3: Control the middle mold to rise, drive the product to rise together, separate the middle mold from the lower mold, and separate the middle area of ​​the bottom of the product from the middle mold core; Step 4: During the rising process of the middle mold, the insert is driven to rise through the guide groove. While the insert rises, it moves inward along the guide column and separates from the inner wall of the product.

10. The demoulding method of a fully automatic rubber mold with inward delayed core pulling according to claim 9, characterized in that: By adjusting the gap between the insert and the guide column, the insert located at the side of the middle mold core is first moved and separated from the product during the rising process of the middle mold, and then the inserts located at the four corners of the middle mold core are moved and separated from the product.

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