Mounting structure of bottom surface forming insert in blow molding die

Abstract

The utility model discloses a mounting structure of a bottom surface forming insert in a blow molding die, which comprises an upper blow molding die holder and a lower blow molding die holder which can move up and down relatively, a blow molding upper half die is arranged on the upper blow molding die holder, and a blow molding lower half die is arranged on the lower blow molding die holder. A plurality of pairs of blow molding half cavities corresponding to each other are formed in the blow molding upper half mold and the blow molding lower half mold; a plurality of pairs of blow molding half cavities are arranged on the lower blow molding die holder, and the lower blow molding die holder is provided with bottom surface molding inserts which are in one-to-one correspondence with the blow molding half cavities, and the specific arrangement mode is as follows: the lower blow molding die holder is movably provided with a bottom surface molding insert mounting plate through a rotating shaft, and the bottom surface molding inserts are all arranged on the bottom surface molding insert mounting plate; a limiting balancing weight is arranged on the outer side of the bottom surface forming insert mounting plate, and a push plate corresponding to the bottom surface forming insert mounting plate is arranged on the upper blow molding die holder. The mounting structure of the bottom surface molding insert is particularly suitable for a blow molding mold with a plurality of cavities.

Description

Technical Field

[0001] The utility model relates to a blow molding die, in particular to an installation structure of a bottom surface molding insert in a blow molding die. Background Art

[0002] like Figure 1 and Figure 2 As shown, the conventional three-station one-step injection-blowing device generally comprises: a machine base 1 and a main shaft 11 movably arranged in the machine base 1, and a triangular turntable 2 arranged on the main shaft 11, and an injection molding station I, a blow molding station II and a demolding station III are arranged in sequence around the triangular turntable 2 in a counterclockwise direction, and the blow molding station II is provided with an upper and a lower blow molding mold base 3 and 4 which can move up and down relatively, and the upper blow molding mold base 3 is provided with a blow molding upper half mold 51, and the lower blow molding mold base 4 is provided with a blow molding lower half mold 52, and the blow molding upper half mold 51 and the blow molding lower half mold 52 are provided with a plurality of pairs of corresponding blow molding half cavities, and the blow molding lower half mold 52 is provided with bottom molding inserts 53 corresponding to the plurality of pairs of blow molding half cavities through bottom molding insert mounting seats 530, and the specific arrangement mode of each bottom molding insert 53 is as follows: the blow molding lower half mold 52 is provided with two threaded holes for guiding connection, A guide connection through hole corresponding to the guide connection threaded hole on the blow molding lower half mold 52 is provided on the bottom molding insert mounting seat 530, and a spring placement hole coaxial with the guide connection through hole is provided on the inner side of the bottom molding insert mounting seat 530. A guide connection bolt 531 passes through the guide connection through hole on the bottom molding insert mounting seat 530, is sleeved with a return spring 532, and is arranged in the corresponding guide connection threaded hole on the blow molding lower half mold 52. The bottom molding insert 53 is arranged on the bottom molding insert mounting seat 530; a push plate 533 matching the bottom molding insert mounting seat 530 is provided on the upper blow molding mold base 3, and a guide chamfer is provided on the outer side of the bottom molding insert mounting seat 530 near one end of the upper blow molding mold base 3, and a guide inclined surface corresponding to the guide chamfer on the bottom molding insert mounting seat 530 is provided on the push plate 533. In the above-mentioned blow molding station II, the blow molding mold 5 is composed of a blow molding upper half mold 51, a blow molding lower half mold 52 and a plurality of bottom molding inserts 53. The bottom molding insert 53 serving as each blow molding cavity is usually an independent insert structure for each cavity. Each bottom molding insert 53 has an independent guide and pushing structure, and the structure is relatively complex and the cost is relatively high. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a mounting structure for a bottom surface molding insert in a blow molding mold which has a simple structure and can reduce costs.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: an installation structure of a bottom surface molding insert in a blow molding mold, comprising: an upper and lower blow molding mold base that can move up and down relatively, a blow molding upper half mold is arranged on the upper blow molding mold base, a blow molding lower half mold is arranged on the lower blow molding mold base, and a plurality of pairs of blow molding half-cavities corresponding to each other are opened on the blow molding upper half mold and the blow molding lower half mold; the lower blow molding mold base is provided with bottom surface molding inserts corresponding to the plurality of pairs of blow molding half-cavities one by one, and the specific arrangement method is: a bottom surface molding insert mounting plate is movably arranged on the lower blow molding mold base through a rotating shaft, the bottom surface molding inserts are all arranged on the bottom surface molding insert mounting plate, a limited counterweight block is arranged on the outer side of the bottom surface molding insert mounting plate, and a push plate corresponding to the bottom surface molding insert mounting plate is arranged on the upper blow molding mold base.

[0005] As a preferred embodiment, in the installation structure of the bottom molding insert in the blow molding mold, the bottom molding insert installation plate is provided with a guide chamfer on the outer side close to one end of the upper blow mold base, and the push plate is provided with a guide slope corresponding to the guide chamfer on the bottom molding insert installation plate.

[0006] As a preferred embodiment, in the installation structure of the bottom molding insert in the blow molding mold, a cooling placement groove is provided on the bottom molding insert installation plate along the arrangement direction of the bottom molding insert and passes through the molding insert installation plate, and a cooling pipe is provided in the cooling placement groove.

[0007] The beneficial effects of the utility model are:

[0008] 1. The utility model arranges the bottom molding insert mounting plate on the lower blow molding mold base through a rotating shaft, so that all the bottom molding inserts can be installed on the same bottom molding insert mounting plate, which greatly simplifies the overall structure of the blow molding mold and greatly reduces the cost; in addition, a limit counterweight block is provided to limit the tipping position of the bottom molding insert mounting plate, thereby ensuring that the push plate can smoothly contact and flip the bottom molding insert mounting plate, so that all the bottom molding inserts correspond to the blow molding half-cavities in the upper and lower half films to form blow molding cavities, thereby ensuring the reliable opening and closing of the blow molding mold; because the movement mode of the bottom molding insert is changed from mobile to flipping, the wear caused by the friction between the bottom molding insert and the upper and lower half films is reduced, thereby greatly extending the service life of the entire blow molding mold.

[0009] 2. The utility model further ensures reliable opening and closing of the blow molding mold by arranging a guide chamfer on the outer side of the bottom molding insert mounting plate close to one end of the upper blow molding mold seat and opening a corresponding guide slope on the push plate.

[0010] 3. The utility model uses the same bottom molding insert mounting plate to mount the bottom molding insert, making the installation of the cooling pipe more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the arrangement structure of a three-station one-step injection-blowing device in the background technology.

[0012] Figure 2 It is a schematic diagram of the installation structure of the bottom surface molding insert described in the background technology.

[0013] Figure 1 and Figure 2 The reference numerals in the drawings are: 1, machine base, 11, main shaft, 2, triangular turntable, 3, upper blow mold base, 4, lower blow mold base, 5, blow mold, 51, blow molding upper half mold, 52, blow molding lower half mold, 53, bottom molding insert, 530, bottom molding insert mounting seat, 531, guide connection bolt, 532, return spring, 533, push plate.

[0014] Figure 3 It is a schematic diagram of the installation structure of the bottom surface molding insert of the utility model during mold closing.

[0015] Figure 4 It is a schematic diagram of the installation structure of the bottom surface forming insert of the utility model when the mold is opened.

[0016] Figure 3 to Figure 4 The reference numerals in the drawings are: 11, main shaft, 2, triangular turntable, 3, upper blow mold base, 4, lower blow mold base, 5, blow mold, 51, blow molding upper half mold, 52, blow molding lower half mold, 53, bottom molding insert, 533, push plate, 5331, guide ramp, 534, rotating shaft, 535, limiting counterweight block, 537, cooling pipe, 538, bottom molding insert mounting plate, 5381, guide chamfer, 7, core rod, 9, plastic bottle. DETAILED DESCRIPTION

[0017] In conjunction with the accompanying drawings, a specific implementation scheme of the installation structure of the bottom surface molding insert in the blow molding mold of the utility model will be described in detail by taking a blow molding mold for blowing plastic bottles as an example.

[0018] like Figure 3 and Figure 4 As shown, the installation structure of the bottom molding insert in the blow molding mold described in the utility model comprises: upper and lower blow molding mold bases 3 and 4 that can move up and down relatively, the upper blow molding mold base 3 is provided with a blow molding upper half mold 51, and the lower blow molding mold base 4 is provided with a blow molding lower half mold 52, and the blow molding upper half mold 51 and the blow molding lower half mold 52 are provided with three pairs of blow molding half cavities corresponding to each other (see Figure 1As shown, the specific number depends on the actual situation); the lower blow mold base 4 is provided with three bottom surface molding inserts 53 corresponding to the three pairs of blow molding half cavities, and the blow molding upper half mold 51, the blow molding lower half mold 52 and the three bottom surface molding inserts 53 constitute the blow mold 5, and the specific arrangement of the bottom surface molding inserts 53 is as follows: a bottom surface molding insert mounting plate 538 is movably provided on the lower blow mold base 4 through a rotating shaft 534, and the three bottom surface molding inserts 53 are all arranged on the bottom surface molding insert mounting plate 5 38, a limited counterweight block 535 is arranged on the outer side of the bottom molding insert mounting plate 538, and a push plate 533 corresponding to the bottom molding insert mounting plate 538 is arranged on the upper blow mold base 3; in this embodiment, the bottom molding insert mounting plate 538 is provided with a guide chamfer 5381 on the outer side near one end of the upper blow mold base 3, and the push plate 533 is provided with a guide inclined surface 5331 corresponding to the guide chamfer 5381 on the bottom molding insert mounting plate 538 on its inner side.

[0019] In actual application, the bottom molding insert mounting plate 538 is provided with a cooling placement groove which runs through the bottom molding insert mounting plate 538 along the arrangement direction of the bottom molding insert 53, and a cooling pipe 537 is arranged in the cooling placement groove.

[0020] The working process of the utility model is as follows: after the plastic bottle 9 is blow-molded, the upper blow mold base 3 is raised together with the upper blow mold 51 and the push plate 533 through the corresponding driving device, the bottom molding insert 53 and the bottom molding insert mounting plate 538 are turned outward around the rotating shaft 534 under the action of the gravity of the limiting counterweight block 535 or other driving force, the bottom molding insert 53 is disengaged from the plastic bottle 9, and the triangular turntable 2 is raised under the action of the main shaft 11, and after the mandrel 7 is raised to the position with the plastic bottle 9 (see Figure 4 As shown in FIG. 1 , the triangular turntable 2 rotates and descends first, and then the upper blow mold base 3 descends with the blow molding upper half mold 51 and the push plate 533. The guide slope 5331 on the push plate 533 pushes the bottom molding insert mounting plate 538 to turn inward around the rotating shaft 534, and the mold is closed (see FIG. 1 ). Figure 3 ), and proceed to the next cycle.

[0021] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. All equivalent changes and modifications made to the shape, structure, characteristics and spirit described in the scope of the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A mounting structure for a bottom molding insert in a blow molding mold, comprising: The upper and lower blow mold bases can be relatively moved up and down, the upper blow mold base is provided with a blow molding upper half mold, the lower blow mold base is provided with a blow molding lower half mold, and the blow molding upper half mold and the blow molding lower half mold are provided with a plurality of pairs of blow molding half cavities corresponding to each other; it is characterized in that the lower blow mold base is provided with bottom surface molding inserts corresponding to the plurality of pairs of blow molding half cavities one by one, and the specific arrangement method is: the lower blow mold base is provided with a bottom surface molding insert mounting plate movably provided through a rotating shaft, the bottom surface molding inserts are all arranged on the bottom surface molding insert mounting plate, a limited counterweight block is arranged on the outer side of the bottom surface molding insert mounting plate, and the upper blow mold base is provided with a push plate corresponding to the bottom surface molding insert mounting plate.

2. The installation structure of the bottom molding insert in the blow molding mold according to claim 1, characterized in that: The bottom molding insert mounting plate is provided with a guide chamfer on the outer side near one end of the upper blow mold base, and the push plate is provided with a guide slope corresponding to the guide chamfer on the bottom molding insert mounting plate.

3. The installation structure of the bottom molding insert in the blow molding mold according to claim 1 or 2, characterized in that: The bottom molding insert installation plate is provided with a cooling placement groove which penetrates the molding insert installation plate along the arrangement direction of the bottom molding insert, and a cooling pipe is arranged in the cooling placement groove.

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