Hollow body forming mold and hollow body forming method

Abstract

A hollow body forming mold includes left and right half molds, a bottom of the left half mold is provided with a left avoidance slot, a bottom of the right half mold is provided with a right avoidance slot, a left bottom slider is disposed in the left avoidance slot, a right bottom slider is disposed in the right avoidance slot, and the left and right bottom sliders constitute a group of sliders. The mold design resolves a difficult problem that a fabrication hole exists during forming of a hollow body with a built-in component by using an existing conventional process The hollow body forming method has the advantages of a short forming period, the high production efficiency, good combination between a built-in component and an inner wall of an fuel tank, and the high location stability.

Claims

1. A hollow body forming method, wherein the method comprises the following steps: step 1) mounting a built-in component to a lifting apparatus; step 2) blanking a parison to a specified location; step 3) delivering, by the lifting apparatus, a baffle into a molten cylindrical parison; step 4) opening a spreader device to expand the parison; step 5) closing a parison closing device to seal the parison; step 6) performing preblowing; step 7) closing a mold, the mold comprising a first mold half and a second mold half; step 8) after the mold is closed in place, lowering the lifting apparatus to outside of the mold; step 9) driving, by a driving apparatus, a first bottom slider of the mold to advance in place, wherein the first bottom slider includes a first slider portion provided in the first mold half and a second slider portion provided in the second mold half, and wherein a second bottom slider is also disposed below the first bottom slider within the mold, and the second bottom slider needs to advance in place before mold clamping; step 10) performing high-pressure blowing in the mold; step 11) after the high-pressure blowing ends, opening the mold, and drawing the first bottom slider of the mold back; and step 12) taking, by a mechanical hand, a product out.

2. The hollow body forming method according to claim 1, wherein in the step 7), the mold is closed in place at one time, and in this process, the first bottom slider of the mold is located at a draw-back location.

3. The hollow body forming method according to claim 1, wherein in the step 9), after the first bottom slider of the mold advances in place, the bottom slider is integrated with a bottom pinch line, to completely seal a mold cavity of the mold; and wherein an advancement process of the first bottom slider has a function of pinching and kneading the parison, and pinches closed a fabrication hole left after the lifting apparatus is lowered.

4. The hollow body forming method according to claim 1, wherein in the step 1), the built-in component is mounted to the lifting apparatus, and the built-in component comprises one or more fuel tank built-in components such as a baffle and a valve pipe assembly.

5. The hollow body forming method according to claim 1, wherein in the step 1), the built-in component is mounted to the lifting apparatus, the lifting apparatus not only has ascending and descending functions, but also has a lateral movement function, and can move to the outside of the mold by using a lateral movement mechanism after descending to be below the mold, to complete the step of mounting the built-in component to the lifting apparatus in the step 1) in advance in the process of the high-pressure blowing in the mold.

6. The hollow body forming method according to claim 5, wherein the lateral movement function implements movement of an entire or a part of the lifting apparatus in a direction perpendicular to a mold closing direction, the lateral movement mechanism comprises a guide rail and the driving apparatus, and the driving apparatus is one or more of conventional drives such as a hydraulic cylinder, a pneumatic cylinder, and a servo motor.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a perspective view of an assembly performing a step 1) of a process;

(2) FIG. 2 is a cross-sectional view of the mold of FIG. 1 showing that the mold is in an open state and a first bottom slider is located at a draw-back location;

(3) FIG. 3 is a perspective view of an assembly performing a step 3) of a process;

(4) FIG. 4 is a perspective view of an assembly performing a step 6) of a processschematic diagram of a process of step 6);

(5) FIG. 5 is a perspective view of an assembly performing a step 7) of a processschematic diagram of a process of step 7);

(6) FIG. 6 is a perspective partial view of an internal status of a mold after the mold is closed in place in the step 7);

(7) FIG. 7 is a cross-sectional view showing that the mold is in a closed state and a first bottom slider is located at a draw-back location;

(8) FIG. 8 is a perspective view of an assembly performing a step 8) of a process;

(9) FIG. 9 is a perspective partial view of an internal status of a the mold after a first bottom slider advances in place in the step 9);

(10) FIG. 10 is a cross-sectional view showing that a mold is in a closed state and a first bottom slider is located at an advancing location;

(11) FIG. 11 is a cross-sectional view showing that a bottom of a mold is provided with a second bottom slider, the mold is in an open state and both a first bottom slider and the second bottom slider are located at a draw-back location;

(12) FIG. 12 is a cross-sectional view showing that a bottom of a mold is provided with a second bottom slider, the mold is in an open state, a first bottom slider is located at a draw-back location and the second bottom slider is located at an advancing location;

(13) FIG. 13 is a cross-sectional view showing that a bottom of a mold is provided with a second bottom slider, the mold is in a closed state, a first bottom slider is located at a draw-back location and the second bottom slider is located at an advancing location; and

(14) FIG. 14 is a cross-sectional view showing that a bottom of a mold is provided with a second bottom slider, the mold is in a closed state and both a first bottom slider and the second bottom slider are located at an advancing location.

DETAILED DESCRIPTION

(15) To deepen the understanding of the present invention, this embodiment is described in detail below with reference to the accompanying drawings.

(16) For purposes of the description hereinafter, the terms “upper”, “lower”, “right”, “left”, “vertical”, “horizontal”, “top”, “bottom”, “lateral”, “longitudinal”, and derivatives thereof, shall relate to the disclosed apparatus as it is oriented in the figures. However, it is to be understood that the apparatus of the present disclosure may assume alternative variations and step sequences, except where expressly specified to the contrary. It is also to be understood that the specific systems and processes illustrated in the attached drawings, and described in the following specification, are simply exemplary examples of the apparatus disclosed herein. Hence, specific dimensions and other physical characteristics related to the examples disclosed herein are not to be considered as limiting.

Embodiment 1

(17) Referring to FIG. 1 to FIG. 10, a hollow body forming mold is provided. The forming mold includes left and right half molds 1, a bottom of the left half mold 1 is provided with a left avoidance slot 9, a bottom of the right half mold 1 is provided with a right avoidance slot 9, a left bottom slider is disposed in the left avoidance slot 9, a right bottom slider is disposed in the right avoidance slot 9, and the left and right bottom sliders constitute a group of sliders.

(18) The left and right avoidance slots 9 are symmetrically distributed and have a same width, and the left and right bottom sliders are symmetrically distributed and have a same width.

(19) The left or right bottom slider is a part that constitutes a bottom pinch line of the left or right half mold 1.

(20) There is only one left or right avoidance slot 9.

(21) There is at least one left bottom slider and at least one right bottom slider, and only one left bottom slider and one right bottom slider are a part that constitutes a bottom pinch line, the group of sliders is referred to as a first bottom slider 2, and remaining slider groups can be arranged below the first bottom slider.

(22) The left and right bottom sliders are respectively connected to the left and right half molds of the mold 1 by using a driving apparatus, and the driving apparatus is usually any one of conventional drives such as a hydraulic cylinder, a pneumatic cylinder, and a servo motor.

Embodiment 2

(23) Referring to FIG. 1 to FIG. 10, a hollow body forming method is shown. The method includes the following steps:

(24) step 1) mounting a built-in component 6 to a lifting apparatus 7;

(25) step 2) blanking a parison 8 to a specified location;

(26) step 3) delivering, by the lifting apparatus 7, a baffle 6 into a molten cylindrical parison 8, where a location at which the lifting apparatus 7 enters the parison 8 is determined based on a location of connection between a built-in component 6 and an fuel tank housing in a product design, and may vary in different products;

(27) step 4) opening a spreader device 5 to expand the parison 8, where an opening direction is perpendicular to a mold 1 closing direction;

(28) step 5) closing a parison closing device 4 to seal the parison 8, where a closing direction is the same as the mold 1 closing direction;

(29) step 6) performing preblowing;

(30) step 7) closing a mold 1;

(31) step 8) after the mold 1 is closed in place, lowering the lifting apparatus 7 to outside of the mold 1;

(32) step 9) driving, by a driving apparatus, a first bottom slider 2 of the mold 1 to advance in place, where the first bottom slider 2 is a constituent part of a lower pinch line of the mold 1, and the first bottom slider 2 is integrated with the lower pinch line of the mold 1 after advancing in place;

(33) step 10) performing high-pressure blowing in the mold 1;

(34) step 11) after the high-pressure blowing ends, opening the mold 1, and drawing the first bottom slider 2 of the mold back; and

(35) step 12) taking, by a mechanical hand, a product out.

Embodiment 3

(36) Referring to FIG. 1 to FIG. 14, a hollow body forming method is shown. The method includes the following steps:

(37) step 1) mounting a built-in component 6 to a lifting apparatus 7;

(38) step 2) blanking a parison 8 to a specified location;

(39) step 3) delivering, by the lifting apparatus 7, a baffle 6 into a molten cylindrical parison 8, where a location at which the lifting apparatus 7 enters the parison 8 is determined based on a location of connection between a built-in component 6 and an fuel tank housing in a product design, and may vary in different products;

(40) step 4) opening a spreader device 5 to expand the parison 8, where an opening direction is perpendicular to a mold 1 closing direction;

(41) step 5) closing a parison closing device 4 to seal the parison 8, where a closing direction is the same as the mold 1 closing direction;

(42) step 6) performing preblowing;

(43) step 7) causing a second bottom slider 3 to advance in place, and closing a mold 1;

(44) step 8) after the mold 1 is closed in place, lowering the lifting apparatus 7 to outside of the mold 1;

(45) step 9) driving, by a driving apparatus, a first bottom slider 2 of the mold to advance in place, where the first bottom slider 2 is a constituent part of a lower pinch line of the mold 1, and the first bottom slider 2 is integrated with the lower pinch line of the mold 1 after advancing in place;

(46) step 10) performing high-pressure blowing in the mold 1;

(47) step 11) after the high-pressure blowing ends, opening the mold 1, and drawing the first bottom slider 2 of the mold back; and

(48) step 12) taking, by a mechanical hand, a product out.

Embodiment 4

(49) Referring to FIG. 1 to FIG. 10, in the step 1), the built-in component 6 is mounted to the lifting apparatus 7, the lifting apparatus 7 not only has ascending and descending functions, but also has a lateral movement function, and can move to the outside of the mold 1 by using a lateral movement mechanism after descending to be below the mold, to complete the step of mounting the built-in component 6 in advance in the process of the high-pressure blowing in the mold 1, and the lateral movement function can implement movement of the entire or a part of the lifting apparatus 7 in a direction perpendicular to a mold 1 closing direction. The function is implemented by using a guide rail and the driving apparatus. The driving apparatus is any one of conventional drives such as a hydraulic cylinder, a pneumatic cylinder, and a servo motor. By using this method, a forming period can be shortened and the forming efficiency can be improved. The remaining steps are the same as those in Embodiment 2 or 3.

(50) While several examples of the invention were shown in the accompanying figures and described in detail hereinabove, other examples will be apparent to, and readily made by, those skilled in the art without departing from the scope and spirit of the disclosure. Accordingly, the foregoing description is intended to be illustrative rather than restrictive. The apparatus of the present disclosure described hereinabove is defined by the appended claims and all changes to the disclosed apparatus that fall within the meaning and range of equivalency of the claims are to be embraced within their scope.